Agricultural submersible pump maintenance precautions

Responding to the necessary maintenance of the agricultural submersible pump to extend its service life and ensure the normal use of busy:
1, the replacement of lubricants: respectively, open the sealed chamber and the motor inside the oil hole screw, the sealed indoor and motor internal lubricants all release, replace the new oil to ensure that the lubrication system to work properly.
2, check the wearing parts: submersible pump impeller, buckle, sleeve, bearing, etc. are wearing parts. First part of the pump should be removed, check the wearing parts are intact. Do not use damaged and unqualified spare parts.
3, the demolition of the pump shell rust: spring before use, should be opened the last level of the pump shell, turn the wheel after the closing start to prevent the parts rust can not start normal and burn the motor. This maintenance is particularly important for water-filled motors.
4, dry motor: 500 megohm meter measuring submersible pump winding and shell insulation resistance, if the resistance is less than 0.5 megohm, you should get rid of motor moisture. Drying methods are: external drying method, current drying method and the simultaneous co-drying method. External drying method is the use of external heat source for processing, commonly used measures are: ⑴ blowing hot air: the use of electric heater blower (agricultural small submersible pump available hair dryer) blowing hot air to achieve the purpose of drying; ⑵ bulb baking: Sealed box, the use of a number of about 200 watts of bulbs for baking. Note that the baking temperature can not be too high, should be controlled below 125 ℃; ⑶ current drying: According to the submersible pump impedance and power supply size of the motor three-phase winding in series or parallel, and then access a variable resistor, adjust the current For the rated current value of about 60%, power drying.
5, to ensure that the seal: agricultural submersible pump on the sealing requirements are very strict, in the replacement of sealed indoor lubricating oil, if found oil turbidity and high water content, you must replace the whole or replace the sealed box or seal ring to ensure its seal Good performance.
6, check the bearing: check the motor part of the upper and lower bearings, if found to wear or clearance is too large, to be timely replacement of new bearings, is strictly prohibited "sick" improvise. Check the method is as follows: If the motor is running, resulting in "carbazole" sound, and the cycle is proportional to the speed, and hand when the rotor is laborious, bearing raceway is a bit astringent or avulsion phenomenon; if the bearing intermittent Of the "choking choked" sound, hand rotation of the rotor when there is uncertainty of the dead point, the ball is generally damaged, broken inner ring or broken ball. Encountered the above situation, you must replace the bearings, so as to avoid greater damage.
7, to ensure that bearing lubrication: the water-filled submersible pump should be checked to replace the upper and lower end of the bearing chamber skeleton oil seal and lithium grease. To ensure that the bearing long-term work in a good state of lubrication.