How to connect the cable of deep well submersible pump

How to connect the cable of deep well submersible pump
    The factory is usually only leads to the cable, the user installation also need to deep well submersible pump cable, so when the cable should pay attention to the correct method, or the use of submersible pumps have a great impact. Deep well submersible pump factory is generally only leads to the cable, the user installation also need to deep well submersible pump to connect the cable, so when connecting cables to pay attention to the correct way, otherwise the use of submersible pumps have a great impact.
Connection Method of Deep Well Submersible Pump
1, stripping the outer sheath of the pump cable and the main insulation layer, exposing the copper wire 35-40mm, near the core part of the rubber repair cone, the core oxide layer polished clean, and with alcohol (preferably Hydrochloric acid) to wipe the core and the insulating layer to be wrapped, sheath layer and make it dry naturally.
2, connectors
1) Power cable 2) Polyvinyl chloride adhesive tape 3) Self-adhesive butyl rubber tape 4) φ1mm copper wire 5) Solder 6) Lead cable
3, ready 500W soldering iron, rosin, solder, lmm bare copper wire and insulation.
4, with bare copper wire evenly tighten the cable core, electric iron heating, infiltration of tin, requires penetration, infiltration. Repair the flat welding part with a file (do not allow burrs and sharp shuttle), and wipe again with alcohol to be bandaged part, dry.
5, first with self-adhesive butyl tape half-package three-tier, and gradually extend to the external core. Bandage must be stretched 200% of the tape, the outer layer of PVC tape and then half-wrapped three-tier package, but also gradually out to ensure that the bandage part of not less than 200mm.
6, three-core cable connector should be staggered by the distance of the three joints in order to prevent short-circuit.
7, when the lead-out cable for the dual-wire method of wiring
1) After the cable connected to the first test cable and motor (without water) insulation resistance, the value of not less than 150 megohm,
2) motor filled with water and then shake the motor winding insulation resistance should not be less than 40 megohm,
3) turn on power test (time not exceeding 2 seconds). Do a good job continued position mark

QJR hot water deep well pump prices

QJR hot water deep well pump, as the name suggests, is in the hot water environment in the use of QJ deep well submersible pump. Its structure and QJ deep well submersible pump is the same, by the pump head, motor, submersible cable composition, the difference is hot water deep well pump motor and diving cables are required to be heat-resistant. The following are the specific requirements of hot water submersible pumps:
1, hot water pump power requirements:
 (1) rated frequency of 50 Hz, the motor rated voltage should be guaranteed to 380 +5 volts of three-phase AC power (if the user voltage is 660 volts to be special orders).
 (2) Transformer load power should not exceed 75% of its capacity.
 (3) transformer far away from the well, the transmission line voltage drop should be considered for power greater than 45KW of the motor, requiring the transformer to the wellhead distance of not more than 20 meters, more than 20 meters, the requirements of transmission line specifications than with cable specifications Level and consider the line voltage drop.
2, water quality requirements:
  1: Allowable operating water temperature range: +5 to +105 ℃;
  2: solid impurity content (mass ratio) is not more than 0.01%;
  3: PH value (pH) 6.5-8.5;
  4: hydrogen sulfide content of not more than 1.5mg / L;
  5: chloride ion content of not more than 400mg / L;
  6: crew must completely invade the water work. Vertical use, select the model diameter and pump models to match, should not use large diameter diameter of small diameter pump, this is not conducive to the motor cooling.
3, wellbore requirements: integrity, smooth, no protrusion or well tube dislocation phenomenon, well diameter is not less than the corresponding frame number.

Stainless steel submersible pumps advantages

Stainless steel submersible pump advantages:
1, stainless steel submersible pump with overload protection device, when the voltage drops, the impeller blockage, water level drops below the ideal level and other conditions caused by the temperature is too high, it will automatically cut off the power to stop the pump work.
2, leak-proof cable, even if the damage will not lead to motor water
3, stainless steel open impeller and shaft, wear and durable, due to the special structure of the impeller and mechanical design, solid particles and long fibers can be thrown out of the pump cavity at high speed without stuck impeller, excellent anti-clogging performance.
4, the whole stainless steel submersible pump housing made of stainless steel SUS304 precision casting, specifically to take a slightly acidic weak base of the sewage.
5, stainless steel submersible pump motor using the old Y national standard copper motor. In this case,
6, stainless steel submersible pump with double-channel series mechanical seal, mechanical sealing surface: alloy on silicon carbide, mechanical seal rubber parts: nitrile rubber, mechanical seal spring: stainless steel

Hot water pump installation and use of matters needing attention

 Hot water pump installation requirements:
        1, the installation height should be less than allowed to absorb the vacuum height minus the water pipeline losses. In the standard case, the installation height is less than or equal to 10.3 - (NPSH) r-0.5-hw, for the suction pipeline hydraulic loss.
        2, the pump outlet outlet flange should be fitted with pressure gauge, in order to observe and control the pump operating conditions;
        3, pipe weight shall not be borne by the pump.
        4, the pump should be installed in a ventilated place, outdoor installation should be added shield to avoid sun exposure and rain.
       Hot water pump installation:
        1, before installation: should check whether the deformation or damage in the course of transport, fasteners loose or fall off.
        2, the installation and configuration of inlet and outlet pipe: pipe installation should be possible to reduce the principle of the pipeline fluid power. The inlet pipe should be added at the filter to prevent the hard impurities or hard particles into the pump cavity damage shaft seals or water, resulting in leakage or abnormal pump; inlet pipe at the check valve, in order to facilitate water injection.
        3, wiring: must be correct according to the nameplate wiring, wiring, the terminal must be solid, not allowed to loose, otherwise, will cause poor contact caused by lack of phase burner. The wiring circuit must be used overload protection device, and according to the motor nameplate on the current requirements of the protection device to adjust the size of the set value.
       Hot water pump start:
        1, the pump should be opened before the start of the water valve and pump exhaust valve plug, close the export gate valve, pump cavity filled with water, so that the pump can start normally;
        2, Jog motor, from the motor side, check whether the direction shown in the arrow.
        Hot water pump operation:
        1, the pump starts gradually open the export gate valve, adjusted to the required operating point;
        2, the pump during operation, the operating point of the flow rate is not greater than the performance parameters given in the table to the flow of the flow point is appropriate, while the motor running current shall not exceed the rated current.
        3, the shutdown sequence: the closure of the export pipeline valve - motor - pressure gauge
        Pump maintenance:
        1, should always check the pump is running in the process of stability, with or without mechanical seal wear and leakage situation, the timely replacement of seals to prevent the pressure of water into the motor
        2, always check the motor housing temperature changes, the maximum temperature should not exceed 85 degrees, such as the temperature is too high, should immediately stop the inspection;
        3, a long time to stop the pump should be row of net water, remove the embroidery scale, coated with rust-proof grease, so that the next use.

Installation of deep well submersible pump

Deep well submersible pump installation
(1) First of all, install a pump tube in the pump outlet, and clamped with a clamp, hanging down into the well, the splint is located in the well stage.
(2) and then a pair of clamping plate clamp another section of the water pipe. Then lift, lower and then connected to the flange of the flange connected with the pad, when the screws must be diagonal at the same time. Raise the lifting chain to remove the first clamping plate, so that the pump down the splint and fell on the well stage. Repeat installation, go down, until all Zhuangwan, put the covers, the last pair of splints will not be demolished on the covers.
(3) installation of elbow, gate valve, outlet, etc., and add the appropriate pad seal.
(4) cable to be fixed in the water pipe flange groove, each section with a rope fixed, down the process to be careful not to bruise the cable.
(5) under the deep well pump if the process of jamming phenomenon, to overcome the card point, can not force the next pump, so as not to die.
(6) installation is strictly prohibited personnel down the job.
(7) protection switch and starting equipment should be installed in the user's power distribution board, the distribution board has a voltmeter, ammeter, light, and placed in the well room in place.
(8) the use of "with a wire from the motor base to the pump tube bundled," the force of protection measures to prevent accidents.

Uses and characteristics of deep well pump

QJ-type deep well pump is designed in accordance with national standards of energy-saving products, widely used in farmland irrigation, industrial and mining enterprises for the drainage and plateau, mountain people, livestock water.
The pump is composed of QJ submersible pump and YQS submersible submersible motor to work together. With the simple structure, small size, light weight, installation, easy maintenance, safe, reliable, energy efficient and so on.
QJR series of wells with heat-resistant submersible pumps with well-heat diving three-phase asynchronous motor directly linked into one, assembled into a heat-resistant submersible pump, heat water temperature up to 100 ° C, is to sneak into the extraction of geothermal Water, the effective equipment; geothermal is one of the cheapest, most clean, inexhaustible latest energy, now widely used in heating, medical, bathing, farming, farming, industrial and agricultural enterprises, entertainment services, health facilities and many other aspect. It has a pump-one, simple structure, reliable operation, no noise, good performance, high efficiency unit, easy installation and maintenance; and heat-resistant, anti-aging, anti-aging and many other advantages, is the embankment to take the latest products.
Stainless steel deep wel pump types:
1, vertical vertical use, such as in the general wells;
2, oblique use, such as the slope in the mine roadway;
3, horizontal use, such as the use of the pool.

Deep well Pump Features

QJ deep well pump is a motor and pump directly into the water work together into the water lifting equipment, it is suitable for extraction of water from the deep wells, can also be used for rivers, reservoirs, canals and other water lifting works. Mainly used for irrigation and plateau mountain areas of human and livestock water, but also for cities, factories, railways, mines, site for drainage use.
QJ-type deep well pump features are:
1, motor, water pump integrated into the water to run, safe and reliable.
2, no special requirements on the well pipe, Yang pipe (ie: steel pipe wells, ash tube wells, soil wells can be used: under pressure permission, steel pipe, hose, plastic pipe can be used for water pipe).
3, installation, use, maintenance simple and convenient, small footprint, do not need to build pump house.
4, the result is simple, saving raw materials. Submersible pump use of the conditions are appropriate, properly managed and the service life of a direct relationship.

Comprehensive understanding of deep well pump

Deep well pump is the biggest feature of the motor and pump into one, it is immersed in the groundwater wells for pumping and transportation of water pump, is widely used in farmland irrigation and drainage, industrial and mining enterprises, urban water supply and drainage and sewage treatment. As the motor into the water at the same time, so the structure of the motor than the general requirements of the special motor. The structure of the motor is divided into dry, semi-dry, oil-filled, wet four.
Before opening the pump, the suction tube and the pump must be filled with liquid.
After the pump is pumped, the impeller rotates at a high speed, and the liquid rotates with the blade. Under the action of centrifugal force, the impeller flew out of the impeller, and the injected liquid gradually slows down and the pressure gradually increases. Outlet, discharge pipe out. At this point, because the liquid at the center of the blade is shaken to the surrounding and the formation of neither air nor liquid vacuum low pressure area, liquid in the pool of liquid under the action of atmospheric pressure, the suction pipe into the pump, the liquid is so continuous Continuously from the liquid pool was sucked up and out continuously from the discharge pipe.
The basic parameters of deep well pump: including flow, head, pump speed, matching power, rated current, efficiency, outlet diameter and so on.

How to Rationally Use Deep Well Submersible Pump

Deep Well Submersible Pump Reasonable use of methods: deep shaft pump shaft pump guide bearing is filled with water in the pump for lubrication. Before operation, the pump tube has not been filled with water, should be pre-lubricating rubber shaft min. Through the pre-hole on the water section, into the lubricating water, pre-lubrication 3 ~ 5min before start. Deep well pump operation, the water level in the deep wells should not be reduced to the pump inlet pipe near the pump that the water should not be too large, so as to avoid moving water level drop is too large, so that a sharp reduction in water, causing pump vibration, Resulting in damage to the motor and water pump.
In order to ensure the safe and reliable operation of the deep well pump unit, the temperature of the motor bearing and the height of the lubricating oil in the oil sump should be checked and monitored regularly. The voltage, current and water pump pressure, water flow and temperature of each part are recorded regularly. parameter.
Vertical deep well pump equipment used, such as the motor voltage, current and pump pressure, water and other abnormalities occur, or the motor running abnormal sound, etc., should immediately stop the use of vertical deep well pump device , And checked.

Deep well submersible pump installation need what tools

What tools are required to install the deep well submersible pump and how to install the outlet section?

Commonly used tools are to install the tower or tripod, winch and a number of special tools, including the chain clamp, pipe clamp, drive shaft bearing plate head and pipe clamps and so on.

Installation of the water section: Before installation, the packing gland, the packing ring and the retaining ring should be taken out, and then the water outlet section should be lifted to align the center line of the shaft hole with the drive shaft and maintain a steady, So that the drive shaft just out of the hole out of the shaft hole. Such as the water section lifting slightly skewed, both the installation of difficulties, but also may damage the drive shaft end of the thread, even when the shaft will cause serious bending deformation. Driving shaft after the use of bolts will pump pipe flange fastened to the water section, and then into the packing pressure ring and retaining ring.

How to install deep well submersible pump

Deep well Submersible pump installation method

A: pump installation steps down the well

1 Shipping:

Be careful when loading and unloading to avoid damaging the unit or breaking the cable insulation.

2 To test the unit, proceed as follows:

A. Open the filter, with the crowbar should be flexible rotation coupling;

B. (10-15 minutes) whether the phenomenon of water leakage, if the leakage, please contact the agent or in a timely manner, please contact the agent or water leakage, Manufacturer, until after the installation of the filter. And then shake the table to measure the insulation resistance of the motor, the resistance should not be less than 50 megohm.

3 wiring test turn:

A. Connect the motor lead to the power cable (see the connection method for the submersible cable). After connecting, connect the connector to the water and check the resistance of the connector to the ground Insulation resistance) is not less than 500 megohms.

B. (The best is the detergent water) at the same time a little jog about the motor start button (time not more than 2 seconds), observe the pump turn, do a good mark continued.

4 units to go down

A. (In particular the first pump under the new wells), with a rope hanging not less than the length of the unit pipe (diameter equal to the maximum diameter of the unit) down to the depth of the pump should be no jamming phenomenon.

B. Enable the hoisting equipment to go down the well, use the insulated cable tie (strictly forbid wire) to tie the cable to the well pipe (pay attention to the cable moderate tension), the flange place the cable into the cable groove to prevent the cable from fraying. When going down the table with the constant watch cable insulation resistance to observe the changes (to prevent the shaft wall frayed cable). If it is found that the insulation value decreases rapidly (less than 0.5 megohms), the unit is brought up to check the cause. After the completion of downhole can be debugged.

5 Debugging: very important, please install the electrical debugging seriously

A. Start time; according to the motor power, master in 10-20 seconds, high-power motor starting time should be longer accordingly.

B. Overload and over current debugging: After the unit starts, adjust the current adjustment button of the thermal relay slowly to less than the actual operating current, rotate a few times every time (interval 2-5 minutes) until the thermal relay operating unit stops working, Reverse the rotation can be a little scale.

C. Phase sensitivity debugging: the unit starts again, one by one off the knife switch fuse, so that the unit is working in two state, observe the thermal relay within 5 seconds to cut off the control power supply.

D. Short-circuit protection: This function is usually achieved by the power supply system, air switch, generally do not make field tests (more dangerous). Requires power supply system must be equipped with air switch (Model preferred DW10 type, followed by DZ type)

After commissioning the control cabinet can start the normal unit test run.

How to use a deep well submersible pump

Deep well submersible pumps are flooding and oil immersion are two, are composed of two parts pump and motor. In order to ensure the normal operation of the pump, the following methods must be used.
    1. Before using the deep well submersible pump, use the megger to check the motor insulation resistance, the minimum value can not be less than 5MΩ. Inspection method is a megger connected to the terminal on the pump cable, the other terminal connected to the motor shell, shake Megohmmeter to observe the insulation resistance.
    2. Check the cable for cracks, abrasions and other phenomena, if any damage should be replaced in time to prevent leakage.
    3. Flooding motor should be open irrigation bolts, filled with clean water after tightening bolts, and then dive into the water. If the oil-immersed motor is found to be leaking, replace the sealing element before diving into the water.
    4. Pump submerged in water before the pump should be filled with water, idle 1 to 2 minutes, and start 2 times, check the idling and start is normal. If the reverse, the two-phase wiring can be replaced.
    5. Check whether the pipe cracks, connection is strong.
    6. Do not pull the cable when the pump is submerged or lifted to avoid damage to the cable or disconnection of the connector.
    7. The power supply voltage should be controlled within 5% of the rated voltage or less. If the voltage is too high or too low, it will damage the motor.
    8. Pump submerged in water should be vertical, not oblique.
    9. Pumps may not deliver more water or mud. Flooding motor should always clean the sand inside the motor cavity, the replacement of motor cavity water.
    10. The actual pump head should be 0.8 ~ 1.1 times the rated head. This can improve the pump efficiency, energy saving, to avoid overloading the motor operation, extend the service life.
    11. After the pump is used, it should be cleaned, rust-proof on the metal surface, and stored in a dry place. Flooding motor should also be put clean water within the motor.

Precautions for use of mine submersible pump

Precautions for use of mine submersible pump
1, the installation of leakage protection Leakage protection device, also known as security, its role from the "security device" the three words can be understood. Because the submersible pump in the water, easy to leakage caused by power loss or even lead to electric shock accident. If the leakage protection device is installed, the leakage protector will cut off the power supply of the submersible pump to avoid leakage of electricity and ensure the safety if the leakage value of the submersible pump exceeds the operating current value of the leakage protector (generally not more than 30mA).
2, the power supply voltage is abnormal MO start in rural areas due to low voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is below 198 volts, the line voltage is lower than 342 volts, submersible pump motor speed down, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in long start-up winding power and even burn Windings and capacitors. Conversely, a high voltage causes the motor to overheat and burn out the winding. Therefore, the submersible pump in operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, higher than 10% of rated voltage above, the motor should stop running, find out the cause and troubleshooting. In this case,
3, to avoid frequent switching Do not frequently switch on the submersible pump, this is because the pump will stop when the return flow, if the immediate start, the motor load will start, resulting in starting current is too large and burn out the winding. Due to the large current at start-up, the frequent start-up also burns the submersible pump motor windings.
4, let the mine submersible pump long-term overload to avoid submersible pump long-term overload, do not draw large amounts of sediment water and observe whether the current value specified in the nameplate value, if the current is too large, should Shutdown check. In addition, the dehydration pump running time should not be too long, so as not to make the motor overheating and burned.
5, the direction of rotation of the motor to be correct to figure out the direction of rotation of the motor, there are many types of submersible pumps are forward and reverse when the water can be, but the reversal of small water, the current is large, the reversal of a long time Will damage the motor windings.
6, cable installation and submersible pump insulation resistance requirements When installing submersible pumps, the cable to overhead, the power cord should not be too long. Submersible pump into the water or put forward not to force the cable to avoid breaking the power cord. Do not sink submerged pump in the mud, otherwise it will lead to bad motor cooling and burn motor winding. Installation, the motor insulation resistance should not be less than 0.5 megohm. In this case,
7, Qinqin to see the problems found in time to repair the regular checks should always check the motor, if found under the cracks, rubber seal ring damage or failure, should be replaced or repaired, to avoid water infiltration submersible pump.

Movement Rule of Deep Well SubmersiblePump Valve

Deep well submersible pump valve's motion law in addition to the linear motion of the vertical direction, and is accompanied by two kinds of rotary motion. When the piston velocity is small, the valve ball level weeks rotate; When the piston velocity is larger, the valve ball around the week of vertical horizontal biography and the hole edge horn is along the seat seat hole center axis of revolution. The rotating angular velocity is associated with the rate of movement of the plunger, the plunger speed, the greater the valve ball rotation angular velocity. The greater the special movement form the main valve ball and valve seat structure particularity and the impact of the fluid. Deep well pump valve is a ball valve, when the fluid around it activities, behind will occur from the phenomenon of boundary layer, at the same time produce a lateral move. Because of the symmetry valve ball, the lateral exciting force move along the valve ball near the equator of the cycle, the valve ball is not always located in the seat hole axis line. But deviate from an interval and tight against the seat edge rotation, this is the phenomenon of revolution.

Not disorderly fluid activities and relative deviation caused by fluid of valve ball valve ball activity differences, according to the error of valve ball will produce certain scratched, the transverse force is not applied to its. But in the horizontal plane and there is a certain eccentricity, the valve ball in the horizontal plane and a rolling, this kind of phenomenon is called an autobiography.

Common faults and reasons of deep well submersible pump

(1) Poor seal. After a period of use, sealing parts of the motor manufactured by high wear-resisting materials will be aged and worn and water leakage will be happened due to poor seal.

(2) Cannot pump water. Due to the damage of bearing, deep well submersible pump cannot pump the water.

(3) Stuck pump. The phenomenon that the impeller of deep well submersible pump is blocked by debris and deep well submersible pump cannot rotate while can hear the noise is called stuck pump.

(4) Electric leakage. There is automatic trip phenomenon when leakage protector in voltage transformer room closes switch blade.

(5) Outlet pipe is damaged and leaked. If rotation of the ammeter is normal and normal sound of pump wheel of submersible pump in deep well can be heard, while deep well submersible pump pumps little water or cannot pump water, it is often caused by the damage of outlet pipe of deep well submersible pump.

Transformer Electric Power Control of Mine Submersible Pump

Type of Transformer Electricity Control for Mine Submersible Pump Transformer
    Low-pressure mine drainage pump starts, the need to go through the transformer 6kV or 3kV high voltage into low-voltage motor to adapt to the rated voltage, usually 660V or 380V. Mining transformers are divided into mine type and mining type explosion-proof type. Mine general type has KSJ series, KSJL series, only applicable to mine underground no explosion dangerous place; mine explosion-proof type has KSGB type and so on, adapted to have the explosion danger place.
    KSJ-type power transformers are mine-type electrical equipment in general, on both sides of the tank with high and low voltage cable junction box. In order to avoid the oil pillow and the tank connection pipe plug explosion occurred, the upper oil left oil expansion space, the top cover oil filler plug is equipped with ventilation holes. Transformer oil due to high temperature decomposition of the gas, released from the hole in the plug, remove the plug can be added inward insulating oil.
   Transformer high voltage winding with adjustable secondary voltage ± 5% of the tap. When the supply voltage is longer than 95% of the rated voltage, the tap is adjusted to a 5% of the terminals; the other hand, when the power supply voltage is higher than 105% of the rated voltage, the tap adjustment in the +5% To ensure that the low-voltage side of the normal.
    In order to meet the two kinds of power supply voltage level, the secondary winding has two kinds of wiring ways (star, triangle connection), 660V for Y wiring, 380V for △ wiring.
    Under normal circumstances, the mine drainage pump transformer to ensure that there is a run, a spare. Two transformers can run side by side, but also run separately. Two transformers run side by side to meet the following conditions:
    1, the same wiring group.
    2, variable ratio difference shall not exceed 0.5%,
    3, the short circuit voltage difference shall not exceed 10%,
    4, two transformers than the capacity of not more than 3: 1,
    Insulation aging caused by the main transformer is the temperature rise, the general oil-immersed transformer using A-class insulation, A-class insulation of the maximum allowable temperature of 105 ℃, the coil allows the temperature rise of 65 ℃. The allowable temperature rise of the transformer oil is 55 ° C.
    KSGB-type transformer for the flameproof transformer, the internal oil-filled, shell has a greater intensity. High and low voltage coils are multi-layer cylindrical structure, the transformer is H-class insulation, can work at 165 ℃ long-term operation temperature.

The flow field in deep well submersible pump is the key to improve the performance of deep well pump

Studying the flow field in deep well submersible pump is the key to improve the performance of deep well pump.

With the PIV technology, LDV technology and ultrasonic technology matures, people can already use these advanced flow field test technology without disturbing the flow field for high-precision measurement.

In this paper, we use PIV (Particle Image Velocimetry) to study the flow field of deep well pump in Canada. The main content of this paper is to measure the distribution of the flow field in the pump at different flow rates, Similarities and Differences of Flow Field in Deep Well Pumps for Single - phase and Miscible.

Test procedure:

The industrial white oil with density and viscosity similar to that of crude oil was used as the test medium, and GDX501 polystyrene pellets with density close to that of white oil were used as tracer particles. A 10-W neon laser generator and its corresponding light path system were used as the illumination source of the PIV camera, and the PIV images were recorded by video or photographic method. For different working conditions, the PIV images of deep well pump cylinder, pump valve, plunger and other parts were recorded and photographed under single-phase and gas-liquid two-phase medium, respectively, in order to prepare for further analysis and processing.

Experimental results and analysis:

Because of the research on the flow field of the deep well pump fixed valve has been the corresponding research results, and gas-liquid two-phase flow PIV image processing program is imperfect, so here focused on the analysis of single-phase fluid flow medium when the deep well pump valve and column Plug the flow field.

Movement law of deep well pump

In the experiment, it is found that the movement law of the deep well pump valve is not exactly the same as it is known to people. Its motion is accompanied by two kinds of rotary motion besides the vertical linear motion. When the piston moving speed is small, the valve ball around the horizontal axis up and down rotation; when the piston movement speed is greater, the ball around the vertical axis of the horizontal rotation and along the valve seat hole hole angle of the central axis of the valve seat orbital revolution. The rotation speed of the piston and the speed of movement of the plunger, the greater the speed of movement of the plunger, the greater the rotation speed of the valve ball. The special form of movement of the ball is mainly related to the particularity of the valve ball, the seat structure and the impact of the fluid. Deep well pump valve is a spherical valve, when the fluid flows around it, in its rear will be the phenomenon of the detachment of the surface layer, while producing a lateral excitation. Due to the symmetry of the ball, this lateral excit- ing force will move around the "equator" of the valve ball so that the ball does not always lie on the axis of the valve seat bore, but rather deviates a distance and abuts against the valve seat Corner rotation, this is the "revolution" phenomenon.

In addition, due to fluid flow instability and the deviation of the valve ball caused by fluid flow relative to the ball valve asymmetry, the ball will have some flexibility, so that the lateral force is not acting on the core, but in the horizontal plane There is a certain degree of eccentricity, so that the ball in the horizontal plane there is a rotation, the "rotation" phenomenon. The above conclusion is obtained in the case of pure liquid. In the gas-liquid mixed-phase flow, due to the presence of bubbles, the flow field disturbance is more intense, and bubbles on the ball has a certain impact, this time the ball movement is more complex, in addition to rotating movement, there are up and down violent beating

Deep well submersible pump in operation to pay attention to the six major issues

Deep well submersible pumps on the operation of the six major issues, some friends may also not very clear, let's learn about it.
1) deep well submersible pumps work, pay attention to the situation of water level decline, wells with submersible pumps shall not work out of the water surface.
2) The use of wells with a submersible pump stop, less water, noise and thermal protector frequent take-off and so on, should stop the pump in time.
3) Check the power supply voltage is too low or power, cable breakage or lack of phase.
4) Check whether the impeller jam or wear, whether the water chamber blockage, head too high or too low, the filter is blocked and so on. If a fault, find the appropriate solution.
5) In case of stator winding burnout and other failures, shall be sent to the repair unit repair. Reassembly, the sealing parts to be 0.2MPa pressure check.
6) When the submersible pump is used, it is found that the damaged cable is replaced immediately before it can be used. If there is a period of time, wells with submersible pumps should not be infiltrated into the water, should be cleaned. Such as wells with a submersible pump for pumping more viscous slurry, should be placed in clean water running for a few minutes, wash the pump slurry, and then dry painted anti-rust oil, stored in dry gout.

Cause of overheating of submersible pump motor

Weihu submersible pump manufacturers combined with many years of experience in pump system, professional team for your analysis of submersible pumps supporting the reasons for overheating the motor,
    First, the power source of the reasons: the voltage is too high or low, under a specific load, if the voltage range should be in the range of +10% to -5% of the rated value will cause the motor overheating; power three-phase voltage asymmetry, Phase-to-phase voltage interphase imbalance of more than 5%, will lead winding overheating; phase operation, experience shows that more than 85% of agricultural motor is burned due to lack of phase operation caused by motor phase protection device should be installed.
    Second, the reasons for submersible pumps: selection of power is not complete, small horse-drawn carts, motor overload operation for a long time, so that the motor temperature is too high; start too frequently, fixed or short-time intermittent work of the motor system for continuous work. Should limit the number of starts, the correct choice of thermal protection, according to the calibration of the motor using the quota.
    The stator windings are short-circuit, inter-turn short-circuit or local grounding, light when the local overheating of the motor, in severe cases when the insulation is not connected to the motor, Burnout; squirrel cage rotor broken or defective, the motor running 1 to 2 hours, the core temperature increased rapidly; ventilation system failure, should check whether the fan is damaged, the direction of rotation is correct, whether the ventilation duct blockage; Eccentric cleaning chamber so that the stator and rotor core phase wiping metal impact sound, the rapid increase in core temperature, a serious electric motor smoke, and even coil burned.
    Fourth, the working environment reasons: the motor winding damp or dust, oil, etc. attached to the winding, resulting in lower insulation. The insulation resistance of the motor should be measured and cleaned, dried; the ambient temperature is too high. When the ambient temperature exceeds 35 ℃, the inlet air temperature is high, the motor temperature is too high, should try to improve their working environment. Such as scaffolding shade.
    Reminded: due to electrical causes of failure, should be requested to obtain professional qualification certificate of electrical maintenance, knowledgeable people can not blindly repair, to prevent the occurrence of personal injury accidents.

Assembly Process Analysis of Deep Well Submersible Pump

Deep well submersible pump installation requirements rubber ring surface intact, remove the old circle is not allowed to re-use, the new rubber ring should be 2% to 5% of the amount of stretch, circle body is not allowed to flip, can not fall into the motor interior or Damaged by mouth. Tighten the bolts should be tightened in turn, section compression rate to ensure that 15% to 25% or so to prevent the ring body compression or excessive compression caused by sealing failure. Shaft seal: shaft seal is generally located in the shaft extension side of the motor, the use of rotating shaft lip seal (skeleton oil seal), is a rotary seal, which consists of elastic lip, metal frame, spring three parts. Applicable line speed up to 30m / s. It is mainly to prevent impurities in the water and sand into the submersible pump interior. Attention should be paid to maintain the correct position of the spring assembly to prevent spring force from overflowing.
Thermal protection Built-in thermal protection is a bimetal-type protection element, commonly used in dry submersible pumps. When used in series with the motor windings, the motor can provide thermal overload, phase loss and stall protection, the action life of more than 1000 times. For three-phase submersible pumps, the thermal protector is connected to the winding center of the Y-connected. For single-phase submersible pumps, the thermal protector is connected in series with the primary and secondary windings. Pressure test with double-sided mechanical seal or double-track single-ended mechanical seal dry and oil-filled submersible pump should be assembled after the pressure test, the test pressure is generally generated by the compressed air pump, no conditions can be used high-pressure air cylinder string pressure gauge instead of air pump. The pump-side seal shall be subjected to the test pressure equal to the maximum pump head pressure, but shall not be less than 0.2 MPa. The pressure test shall last for 5 min and the seal shall be free of leakage. The inner cavity of the motor and the seal on the motor side shall be capable of withstanding a pressure test of not less than 0.2 MPa for 5 min without leakage or other anomalies

Structure Description of Multistage Deep Well Submersible Pump

1, multi-stage deep well submersible pump unit by: pumps, submersible motors (including cables), water pipes and control switch four major components.
The submersible pump is a single-suction multi-stage vertical centrifugal pump. The submersible motor is a wet-type, vertical three-phase cage induction motor. The motor and water pump are directly connected by a claw type or single cartridge type coupler. Equipped with different specifications of three Core cable; starting equipment for the different capacity levels of air switch and self-dual decompression starter, the water pipe is made of different diameter steel pipe, flange connection, high-lift pump gate valve control.
2, submersible pumps each stage diversion shell is equipped with a rubber bearing; impeller tapered sleeve fixed to the pump shaft; diversion shell with threaded or bolted together into one.
3, high head submersible pump with a check valve at the top, to avoid downtime caused by water damage to the unit.
4, the upper part of the submersible motor shaft with a labyrinth of sand and two reverse assembly of the oil seal to prevent the flow of sand into the motor.
5, submersible motor with water-lubricated bearings, the lower part with rubber pressure regulating film, pressure regulating spring, composed of surge chamber, regulating the temperature changes caused by the pressure; motor winding with polyethylene insulation, nylon sheath durable consumer goods water magnet wire , Cable connection by QJ-type cable connector technology, the joint insulation off scratch paint layer, were connected, welding firm, with a layer of raw rubber around. And then wrapped with 2 to 3 layers of waterproof adhesive tape, wrapped with 2 to 3 layers of waterproof adhesive tape or a layer of rubber tape wrapped with water (bike belt) to prevent seepage.
6, the motor is closed, the use of precision only bolts, cable exports plus pads for sealing.
7, the motor has a water injection hole at the top, there is a vent, the lower part of a drainage hole.
8, the motor is equipped with the upper and lower thrust bearing on the bottom, thrust bearing groove for cooling, and it is the stainless steel thrust plate, with the pump up and down the axial force.

Brand certification Weihu pump safety deep well submersible pump

Deep well submersible pump is an important product of mineral industry, animal husbandry and agriculture in China. In particular, the use of deep well submersible pumps in agriculture and animal husbandry should pay particular attention to power problems. Rural areas as a result of low-voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is below 198 volts, the line voltage is lower than 342 volts, submersible pump motor speed down, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in long start-up winding power and even burn Windings and capacitors. Conversely, a high voltage causes the motor to overheat and burn out the winding. Therefore, the submersible pump in operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, higher than 10% of rated voltage above, the motor should stop running, find out the cause and troubleshooting.
    Leakage protection device, also known as protectors, its role from the "security device" the three words can be understood. Wei Shanghai pump brand submersible pump has a number of patents, leakage protection is the days of submersible pump submersible pump R & D and production of one of the important projects. Combined with years of market feedback from users under the premise of large data, Wei-hu pump is deep digging the user pain points, increased R & D funds, through continuous experiments to determine the safety of the product. Because the deep well submersible pumps are mostly in the water, easy to leakage caused by power loss and even lead to electric shock accident, equipped with leakage protection deep well submersible pump, as long as the submersible pump leakage value exceeds leakage protection action current value (generally not more than 30 mA), leakage protection device will cut off the power of the submersible pump to avoid leakage of waste of electricity to ensure safety. It is also on this basis, Wei Hu pump produced by the deep well before each submersible pump factory will automatically control the test stand insulation resistance data monitoring to increase the safety of the pump and the use of more. "Never leave troubles" has also been the heart of Shanghai Wei people to product quality strictly to control the best interpretation.

The reasons for submersible water pumps flow quantity decrease

The reasons for submersible water pumps flow quantity decrease

Submersible pump is a very versatile tool in water treatment. Unlike ordinary water pump it works under water, and water pump work mostly on the ground. Submersible pump installation, use, maintenance convenience simple, cover an area of an area small, do not need to build the pump room. Simple structure, saves the raw material.

Submersible pump compact structure, and only when the work will be in the water pump can be start work, simple installation, convenient movement. Due to its simple structure, small volume, easy to use, so got rapid development. Submersible pump design starting point is "no jams, no winding", some models with a torn institutions or cutting device, can carry sewage long fiber, bags, such as tear out the back.

Open pump, the suction pipe and pump must be filled with liquid. After open pump, high-speed rotating impeller, the liquid with the blades rotate together, in under the action of centrifugal force, fly away from the impeller to injection, injection of the liquid in the pump shell gradually spread of indoor speed slow, pressure increase gradually, and then from the pump discharge, the discharge pipe flow.

Place in the center of the blade due to liquid was dumped into the surrounding formation is no air and no liquid vacuum low pressure area, fluid in the pool liquid under the action of atmospheric pressure on surface of the pool, the suction pipe into the pump, the liquid is continuously from the liquid pool was sucking up and continuously from the discharge pipe flow. Submersible pump eight factors of water or no flow because there are a lot of submersible pump material is cast iron or plastic, if only use these materials to the submersible pump, it is difficult to meet the needs of customers, such as there are many corrosive medium can't emissions, such as sulfuric acid, hydrochloric acid, nitric acid, etc.; This is one of its characteristics. Also features besides not rust, high temperature resistance.

So there are a lot of manufacturers and production of the high temperature resistant stainless steel submersible pump. Although is stainless steel, but there are a lot of auxiliary material is not much high temperature resistant, generally within 120 ° is no problem, such as some chemical plants need high temperature over 200 degrees or choose centrifugal pump. Insufficient in the operation process of 1, submersible pump flow or no flow, the main reason:(1) the pump installation height is too high, not enough impeller submersion depth, led to the decrease of the water pump water yield;(2) water pump to the opposite;(3) water valve cannot be opened;(4) water line is not clear or impeller blocked;(5) the lower pump abrasion and circle severe or debris jam;(6) pumping liquid density or viscosity is too high;(7) loss or damage to the impeller;(8) pumps more common, the output of the line is not installed a one-way valve or one-way valve seal is lax.2, elimination measures(1) to control the pump installation elevation of allowable deviation, an extended arbitrarily;(2) the pump test run before idling motor, check the steering to that of the water pump.

In the process of using the above situation should check whether the power phase sequence change;(3) check valves, and often the valve for maintenance;(4) clean the pipe and impeller clogs, often salvage reservoirs stuff:(5) clean up debris or replace wearing ring;(6) to find the cause of the water quality change and management;(7) to reinforce or change the impeller;(8) add or replace a one-way valve after check the reason.

WQP series stainless steel submersible water pumps models and parameters

WQP series stainless steel submersible water pumps models and parameters

WQP type series stainless steel submersible pump is the introduction of foreign advanced efficiency non-clog submersible pump design experience, combining with the characteristics of the use of domestic water pump and the successful development of a new generation of submersible pump products, energy saving effect is remarkable, winding, no jam, automatic installation and automatic control, etc.

Solid particles in the lining and long fiber waste stainless steel submersible pump has a unique effect.WQP type series of stainless steel submersible pump used in chemical, petroleum, pharmaceutical, mining, paper industry, cement plant, steel mills, power plants, coal chemical industry, and urban sewage treatment plant drainage systems, municipal engineering, construction and other industries containing particles of sewage, dirt, and can also be used for pumping clean water and corrosive medium.

Stainless steel submersible pump adopt unique structure and new type of mechanical seal, can effectively deliver a solid and long fibers. Compared with the traditional impeller, the impeller of the pump impeller with single port or shuangliu form, it is similar to a cross section of bending tube with the same size, has the very good flow, with reasonable volute chamber, make the pump with high efficiency, impeller through static balance test, for no vibration in the operation of pump.

Well with submersible pump installation1. Submersible pump device by water pump, motor, water pipe, waterproof cable and five most control switch, the pump is single-suction multi-stage vertical centrifugal pump.2. The submersible motor structure of strong water wet, inner cavity is filled with water, it is mainly used for motor cooling, and bearing lubrication.

In the process of operation caused by temperature change, the motor cavity flushing pressure changes, can adjust bottom pressure regulating device automatically by a motor.3. To prevent sediment into motor, the motor with a left upper Sha Qi and skeleton oil seal, sand body, the whole department seal structure.

Top 4. The motor is equipped with water injection hole and vent, the bottom has a plug-hole.5. Lower motor equipped with a thrust bearing thrust plate, mainly bear residual axial force of pump and motor rotor of self-respect.6. Motor stator winding adopts water resistant electromagnetic wire, good insulation and resistance to water, for squirrel-cage rotor structure.

Features and principles of high lift submersible water pumps

Features and principles of high lift submersible water pumps

The characteristics and principle of young pump release date young pump features:AT540QJ mine submersible pump series features:

1, motor, water pump, body, run into the water, the Mars, explosion-proof, safe and reliable.

2, no special requirements for well tube, for delivery as long as can withstand the pressure can be accordingly.

3, installation maintenance convenience simple, cover an area of an area small, do not need to build the pump room.

4, simple structure, saves the raw material.

5, high efficiency, energy saving, single-stage high head, large flow, high head, imported high efficiency and energy saving motor, such as: Germany AT200QJ series submersible motor can do 110 kw (maximum overall diameter 184 mm), level 2 speed 410 kw (2900 / min) can do

Using the environment and conditions1, power frequency 50 hz, rated voltage of 300 v or 660 v or high voltage 6 kv, 10 kv (tolerance of + - 5%) of three-phase ac power supply.2, solid content (in quality) is not greater than 0.01%.3, shout by pumping liquid acid degree of PH value of 6.5 to 6.5.4, medium temperature not to exceed 20 ℃.5, water pump inlet must be below the water level dynamic lm, but diving depth is less than the static water level to 70 m, electric pump bottom hole depth at least lm.6, requirements well integrity, wall smooth, well tube shall not stagger. Structural characteristics of1, ATQJ mine submersible pump series, consists of two most, diving three-phase asynchronous electric and water pump.

Motor pump with its upper body straight, the motor shaft top a reliable shaft sealing device, can effectively prevent the cooling fluid for electric motor and the exchange between pumping medium, guarantee the pump running safely and reliably for a long time.2, submersible pump is single-suction multi-stage vertical centrifugal pump;

Submersible motor for filling water wet, vertical Wells with diving asynchronous motor. Motor and pump through drum coupling straight league.3, motor winding for polyethylene water resistant nylon sheathed electromagnetic wire. Motor cavity filled with clean water.4, guide bearing with water lubricated bearing of the electrical machinery. Lower part of the motor cannot bear water pump axial force of the thrust bearing, high lift water pump of thrust bearing with nickel copper fan, and it is import for the grinding of Loeb, skateboard, inherit and axial force of pump.5, young water pump in the middle of the pump and motor additional axial force bearing, head can be raised to 1500 m.

How to choose a proper model of well submersible water pump?

How to choose a proper model of well submersible water pump?

Well with submersible pump selection should comply with the following: 1.1 using conditions Before the selection must first understand the basic situation of the well, such as caliper size, possible water yield, sediment concentration, etc., according to the circumstance of understanding to choose appropriate electric pump specifications.

It is important to pay special attention to the fresh water pump for water pumps, mix water, the high content of sediment cannot draw more cannot be used to clean out the new well, or you will wear pumps.

Motor burn out.1.2 Wells with submersible pump application Used for pressure tank water supply flow and high delivery lift should be selected for the Wells with submersible pumps; Used in water tower water supply, according to the water tower and head size, can choose medium flow Wells with submersible pumps;

Used in irrigation, under the condition of the head right, try to choose large flow Wells with submersible pumps.1.3 choose fittings In Wells with submersible pumps of choose and buy accessories such as cables, protection switch, Yang conduit. Should choose the formal manufacturers supporting products, lest leave hidden trouble for later use.

Stainless steel deep well submersible pump extensive role depends on what? Stainless steel deep well submersible pump is made from stainless steel as the name implies, it water for agricultural irrigation, plateau region, the respect such as factory drainage plays an important role. The stainless steel deep well submersible pump with what can play an important role in the kind of field?

A. The characteristics of stainless steel deep well submersible pump: Stainless steel deep well submersible pump to realize the integration of the water pump, motor, small work on the well tube, save energy and material, safe and reliable work, each industry welcome.2. Stainless steel deep well submersible pump working principle: Before the pump starts to work, we are going to the pump body and suction tube filled with liquid, began to high-speed rotating impeller, at the beginning of the work at the same time to drive the rotation of the liquid, liquid to fly out, so as to make the center of pressure decrease the water absorption.

Why does the flow quantity of submersible water pumps increase?

Why does the flow quantity of submersible water pumps increase?

Abstract: submersible pump running current is large and the adjustment of the pump valve and the mechanical failure of the motor have a certain relationship

Submersible pump running current is large and the adjustment of the pump valve and the mechanical failure of the motor have a certain relationship. The main reasons are as follows:1, guide bearing motor wear, pump rubber bearing wear, sealing ring wear motor or pump bearing wear, can make the submersible pump in abnormal working state on mechanical, serious damage submersible pumps, the stator winding burn.

Processing method is to repair or replace the damaged bearing and shaft sleeve.2, submersible pump, the flow of small or large use traffic is beyond the scope to use can make the motor overload: for the centrifugal water pump or mixed flow pump, too much traffic, increase of pump shaft power, can make the motor overload;

Of axial flow pump, the flow is too small, the pump shaft power increases, can make the motor overload. Processing method is to adjust the valve to the centrifugal water pump or mixed flow pump decrease to increase the axial flow pump flow, make the use of the flow of water pump in the normal range.3, submersible pump shaft bending, bearing different heart This kind of a serious condition, should immediately for maintenance, bending straightening shaft, replace the unqualified bearing, reassemble submersible pumps.4, thrust bearing wear, submersible pump impeller and the lower cover plate wear This kind of circumstance also can make the submersible pump in abnormal working state on mechanical, serious will also damage the submersible electric pump.

Processing method is to check the cause of the thrust bearing wear, whether due to the damage of mechanical seal, shaft extension end caused by sand and impurities into the motor chamber of thrust bearing caused by excessive wear. If it is the cause of mechanical seal, the repair or replacement of wear under the thrust bearing, thrust plate and impeller, cover board and other components at the same time, should replace the shaft extension end of mechanical seal.5, submersible pump running current is big about selection, head submersible pump selection is too large, the actual use of head is small.

Deep well submersible pump temperature difference control method

Deep well submersible pump motor and pump is straight league diving operations carry water machine, it applies to obtain from a deep well of groundwater, can also be used for rivers, reservoirs, canals and other water engineering: primary human and animal use water for irrigation and plateau mountainous area, also for cities, factories, railways, mines, construction site water supply and drainage. Because of deep well pump is operated by motor and pump body directly into the water, it is the use of safety and reliability will directly affect the deep well pump and operation efficiency, therefore, safe and reliable features high deep well has become the preferred.

Deep well submersible pump temperature difference control method. Because of the heat pump units under heating conditions, it is necessary to ensure that the evaporator water temperature too low, so in the deep well water temperature sensor is set on the pipe, TJH set temperature. Well water side return water temperature is greater than the TJH value, the deep well pump controller drops announced to the inverter current frequency signal, the frequency of the inverter input power, deep well pump revolutions reduced, water supply pump, shaft power and the input power of the motor are down, and then achieved the intention of energy saving. When water side return water temperature is lower than the TJH value, frequency control.

Fountain pump manufacturers products three major characteristics

Fountain pump manufacturers of three major product features:
1, the fountain pump to start the transition time is shorter, to ensure that with the control of the rhythm requirements, the rapid start, so that the fountain pump instantaneous set point conditions to achieve the requirements.
2, when the fountain pump is started frequently, the starting current is 5-7 times the rated current, the pump is subject to frequent overload shock, easily lead to the motor stator winding temperature is too high, more than the standard temperature rise requirements, resulting in winding insulation Layer over-temperature aging, resulting in reduced or burned winding insulation.
3, and drainage pump with a different fountain pump to withstand alternating load, requiring special pump fountain overload capacity to be strong, not overload control switch or inverter overload protection.
The above is the fountain pump manufacturers in Shanghai summed up the three major product features, I hope you have some understanding of the fountain pump. If you would like to learn more news, please also pay attention to our updates, after any questions, please call the inquiry, we wholeheartedly at your service.

Fountain pump use range

Fountain pump range of use, due to the different types of products, different types of use is also a strict requirement. details as follows:
Rotate by hand to see whether the pump is flexible rotation, check the pump piping and joints for loosening or leakage phenomenon.
Check the oil in the bearing body to ensure that the oil level in the oil near the center line and, as the case in time to replace or supplement.
Check whether the damaged pump cable and power supply, electrical equipment is reliable, power supply voltage, frequency, and nameplate requirements are consistent, the deviation is within the allowable conditions within the scope of use.
After installation, should be taken to start the motor, try to see whether the motor steering is correct. After each shutdown and before starting, must be measured in the hot and cold insulation resistance to observe the insulation resistance changes.
In the first month of work, after 100 hours of work, the oil should be replaced, after each 1000 hours oil change. On the water-filled need to regularly replace the upper and lower end caps, bearing room skeleton oil seal and lithium-based grease to ensure good lubrication.
Regularly check the sleeve wear, when there is greater wear, should be replaced in time.
Shanghai fountain submersible pump used in the winter season, after parking, the pump must be the lower part of the water plug screwed open, and the media put the net to prevent the pump frost. Long-term disabled, can not be allowed to soak in water. The rotating parts and joints coated with grease installed, stored upright at room temperature, dry, non-corrosive chemicals where the proper custody.

The advantages of stainless steel fountain pump

Stainless steel fountain pump advantage of our customers in the procurement of pumps will consult our stainless steel pump What are the benefits, of course, this advantage is relative to the cast iron pump, our cast iron pump is cast iron processing, with products The use of the process easier to rust, then the stainless steel pump is used in the international standard 304 stainless steel materials, so the process will not rust in the use of the situation. Effectively guarantee the use of life, there is the difference between the motor, stainless steel motor can be equipped with the corresponding inverter, the effective guarantee of some musical fountain, program-controlled fountain use, the use of a wider range.
Almost can be done is a maintenance-free use of the process, so when you purchase the fountain pump, if the budget is reasonable or select the stainless steel must be easy to use, so you use them easy to use, Save a lot of trouble

304 stainless steel fountain pump description

304 stainless steel fountain pump description

The Use of Small Power Fountain Pump

The Use of Small Power Fountain Pump

Analysis of fountain pump failure

Fountain pump failure analysis, fountain pump, fountain pump flow is insufficient, the occurrence of cavitation, etc. are hydraulic failure. Pump does not run, overheating of the bearing is a mechanical failure. Under normal circumstances, the two faults exist in a phenomenon, such as the lack of head, pump Diao deep operation there is no abnormal vibration and sound.
Troubleshooting should follow the following principles: with the fault should be promptly excluded, the machine can not make sick work. Troubleshooting should: clarify the performance, analysis of a reason to be eliminated. The cause of the failure should be analyzed in many ways, and strive to accurately determine. Exclusion of specific conditions should be specific treatment, can not be mechanically applied.
Analysis and Solution of Common Fault
1) the pump does not water, usually due to a impeller flow path blocked by debris, 2 pump impeller reverse direction of operation, 3 device head beyond the pump design head range caused. As long as the clean-up impeller flow channel, re-connect the motor power cord and re-select the appropriate pump can solve the problem.
4) bending deformation of the pump shaft. With the dial gauge to measure the o axis of the pump shaft in the radial volume, if it is rolling bearings, usually should not be more than 0.05mm beating, if it is sliding bearings, sliding bearing friction should not exceed the gap. In addition, check the rotation of the shaft and wheel rotation Yi, pump normal operation, at different speeds have different rotation jitter allowed value, usually 1450 r / min allowable value of not more than 0.15mm, 2900 points in time to allow The value is less than or equal to 0.10 mm. If the permissible value is exceeded, the shaft and wheel v are measured circumferentially point by point to see if the wheel 0 is eccentric, or is not concentric, or the shaft is bent. It is also possible that the axis is good for neutrality, the rotation is very large, or there is no rotation Mm, but the pay neutral is poor, should be corrected.
5) There is abnormal vibration and sound when the pump is running. It is usually caused by the poor neutral of pump shaft and motor shaft, bending deformation of pump shaft, cavitation of running and friction of rotating parts. If none of the above problems exists, Feet, pump shell bolts without loosening, check the pump pipe there is a clear stress. If the stress is too great, it should be supported at the inlet or outlet to reduce or eliminate stress. Remove and reinstall if necessary.
2) Lack of head, pump outlet pressure can not meet the needs of working conditions. There are many reasons for this failure: pump cavitation, impeller wear and tear after long-term use, supporting the motor speed is lower than the required pump speed, etc., will lead to lower pump head. Increase the level of the pump inlet level or Yang lk pump installation location, can avoid the occurrence of cavitation. Replacement of the impeller is worn, and select the pump to match the motor, is one of the ways to troubleshoot.
3) bearing overheating, bearing more than the normal temperature range. Generally due to a bearing housing lack of oil or 2 oil deterioration caused by bearing temperature anomalies. In the timely confirmation of the reasons to add grease, update the lubricating oil, so as not to damage the bearings. Second, the cause of bearing overheating and 3 pump shaft, motor shaft is not concentric,

Hot water well submersible pump unique structural features

1, hot water well submersible pump heat resistant high temperature submersible motor unique structure
    The high-temperature motor is filled with water and sealed structure, the cavity is filled with water or rust-proof lubricating fluid (rust inhibitor). The joints are sealed with 0-shaped rubber seals or sealant. The shaft end of the motor is equipped with a rubber skeleton oil seal 4 or a single-face mechanical seal 5 so as to prevent the solid impurities and sediment particles in the motor from entering the motor interior. The stator (including windings) 7 of the motor, the rotor 8 and the bearings are all operated in water. The stator winding of the motor is made of water-resistant winding wire with polyethylene insulation, polyethylene insulation or modified polypropylene insulation, and has good water-proof insulation performance and long service life. Water lubricated sliding guide bearings 6 and 9 made of copper alloy, graphite or polymer plastic and the like are attached to the upper and lower portions of the motor, and a water lubricated thrust bearing 11 made of graphite or thermosetting plastic or the like is provided at the lower end of the shaft, In order to withstand the rotor running motor and the axial thrust of the pump. In order to limit the pump to start up the shaft to move up, resulting in short-term motor shaft seal sealing leakage, the lower part of the motor with thrust bearing sliding bearings 10. The bottom of the motor is equipped with rubber pressure regulating bladder 13, to adjust the cavity filled with water due to temperature or pressure changes caused by volume changes. For the thin steel coil shell structure, the shaft end of the installation of rubber skeleton oil seal or mechanical seal for power smaller, shorter core, the chassis force smaller motor. For the steel pipe shell structure, the overall rigidity is better for larger power, longer core, the chassis force larger motor.
2, hot water well submersible pump motor main features
    (1) wells with water-filled hot water submersible motor structure is simple, stator and rotor windings and core immersed in water, cooling effect, the output power, high efficiency.
    (2) due to water-filled high-temperature motor cavity filled with water, the use of the process of leakage on the installation of the well water quality will not produce pollution.
    (3) water-filled high-temperature motor stator windings, iron and bearings are working in the water, the stator winding wire used and its processing technology, joint materials and dressing process, water lubrication bearing structure, materials and processing technology, Iron and metal materials, anti-rust anti-corrosion treatment have high requirements.
    (4) water-filled motor has sufficient reliability, is the well with hot water submersible motors in the production of the most, the most widely used one.

Identification of quality problems of hot water submersible pump several cases

Case 1:
  Due to failure to install according to the instructions required to fill the clean water and clean liquid, or did not put the steam hole open, resulting in false water level. Resulting in hot water submersible pump motor winding burned by the responsibility of the use or installation unit to be responsible.
  The phenomenon is: water invaded the location of the winding adhesion to one (the degree of adhesion can not help the same)
Case 2:
  Because the unit long-term unattended, there is no periodic clean wipe repair the circuit nodes, resulting in increased resistance wire blown fuse, protective measures to adjust and inappropriate or relay failure, resulting in phase loss, the responsibility of the burned winding by the user.
  Phenomenon: a hot water submersible pump unit can not start work, the motor insulation is zero. (If the motor power is large, the scene does not have to open the conditions, must return to the factory identification, the user can be assigned to participate in the identification of technical staff) Winding connection If there is a delta connection of which a winding Burned, the stars connected to the two-phase winding burned, which can be identified as lack of burned. Responsibility for this situation by the use of units to be responsible.
Case 3:
  The user according to the "instructions" requirements, in the one-year warranty period, after the open is due to mechanical wear and tear caused by motor damage, but because of the user's protective measures are sensitive, winding does not burn can continue to use, the factory is responsible for free maintenance Or replacement of mechanical parts, if the hot water submersible pump motor failure caused by mechanical failure of the winding, the user's protective measures do not work, the factory responsible for the maintenance but the cost of the burden of half of the maintenance.
Case 4:
  Hot water submersible pump motor rotor Broken shaft: rotor shaft and rotor silicon steel from: stator casing welding cracking: motor fastening screws loose, are manufacturing quality problems, the responsibility of the mountain manufacturer is responsible for. The solution is: manufacturers responsible for the replacement of new hot water submersible pumps and motors. (Note: the manufacturer is responsible for the replacement of the unit itself is not responsible for associated losses)
  Hot water submersible pump quality problem definition _ mainly from the material and performance of the hot water submersible pump quality requirements of the high hope of using a long life point, we should pay more attention to his material, like the stator height, silicon steel quality Cold rolling is better than cold rolling), the rotor shaft (good with stainless steel welding), as well as oil seals, which is very important for home use if the use of silicon carbide on the very good , Bearing is also very important, even if the brand is a human bearing, which is also divided into 369 and so on. You say the submersible pump, a relatively broad scope, at least talk about how much power, use of such information. Performance, then, you take the pump to test, look at his output power, head flow, speed load how, the same level of motor, high speed, light load.