1. Selection of Submersible Electric Pump
Key Considerations for high-efficiency deep well pumps :
Service conditions.
Inner diameter and depth of the deep well casing (including casing reducers).
Dynamic and static water levels of the deep well.
Optimal water inflow of the deep well.
For water temperatures up to 20°C, select a QJR submersible electric pump.
2. Product Structure Description
The submersible electric pump unit for wells consists of:
Pump Working Section:
The core component, including the impeller, guide housing, upper guide housing, pump shaft, bearing, water inlet joint, valve body, and other parts.
Submersible Motor:
The power source of the unit, comprising the stator, rotor, upper and lower guide bearings, thrust bearing, base, connection section, and sealing device.
Additional components include the pipeline (e.g., lifting pipe, pump base), cable, gate valve, and control cabinet.
3.Usage and Maintenance
After completing the installation of the submersible electric pump:
Recheck Insulation and Connections: Verify the insulation resistance and three-phase conductivity at the switch. Inspect the connections of the instruments and starting equipment to ensure there are no errors.
Initial Start-Up: If no issues are found, start the pump. During the test run:
Observe whether the readings of each instrument remain within the rated voltage and current specified on the nameplate.
Listen for unusual noises or vibrations from the pump.
If everything appears normal, the pump can be put into regular operation.
Operation Notes
Initial Resistance Check: After the first four hours of operation, stop the motor promptly to test the thermal insulation resistance. It should be no less than 0.5 megohms.
Restarting Precautions: After the pump stops, wait at least five minutes before restarting. This prevents excessive motor current and potential damage caused by incomplete water column return in the pipe.
If any of the following issues occur, stop high-efficiency deep well pumps immediately and troubleshoot:
The current exceeds 20% of the rated value under normal operating conditions.
The dynamic water level drops to the pump's inlet section, causing intermittent water discharge.
The pump vibrates excessively or produces loud noise.
The power supply voltage drops below 340 volts.
A fuse burns out, resulting in one-phase operation.
The water supply pipe is damaged.
The motor's thermal insulation resistance falls below 0.5 megohms.
1. outging cable
2. Check valve
3. Valve cover
4. Upper shell
5. Pump bearing
6. Impeller
7. Pump shaft
8. Midde shell
9. Water inlet section
10. Coupling
11. Connection section
12. Motor shaft
13. Upper guide bearing seat
14. Rotor 15. Stator 16.Lower guide bearing seat
17. upper thrust bearing
18. Thrust disc
19. Lower thrust bearing
20. seal
21. Adjusting bolt
22. Base
23. Pressure regulating membrane
24. Pressure regulating diaphragm cover
Model Meaning
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