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