Failures and Solutions of Submersible Pumps

Category: Water pump knowledge

2024-12-12

Submersible pumps are commonly used devices for extracting water from deep sources to the surface, widely applied in agricultural irrigation, industrial water use, groundwater extraction, and other fields. However, due to long-term use or other factors, submersible pumps may experience various failures. Below we will explore some common submersible pump failures and their solutions.

1. Unable to Start

Failure phenomenon: The submersible pump cannot start after being powered on.

Possible reasons: Power supply issues, motor failure, cable damage, etc.

Solution: Check if the power supply is on, ensure the cable is undamaged and well connected, and check if the motor is damaged.

2. Insufficient Flow

Failure phenomenon: The water flow from the submersible pump is significantly reduced.

Possible reasons: Damaged impeller, pump casing blockage, insufficient speed, etc.

Solution: Replace the damaged impeller, clear the blockage inside the pump casing, and ensure the pump's normal speed.

3. Leakage

Failure phenomenon: The submersible pump casing is leaking.

Possible reasons: Worn sealing ring, cracks in the pump body, etc.

Solution: Replace the sealing ring, repair the cracks in the pump body, or replace the damaged pump body.

4. Overheating

Failure phenomenon: The submersible pump runs at a high temperature.

Possible reasons: Overload operation, bearing wear, internal motor failure, etc.

Solution: Check if the load is too high, replace worn bearings, and repair the internal motor.

5. Loud Noise

Failure phenomenon: The submersible pump produces abnormal noise during operation.

Possible reasons: Bearing wear, loose impeller, foreign objects entering, etc.

Solution: Replace worn bearings, tighten loose impellers, and clear foreign objects that have entered the pump.

6. Electric Leakage

Failure phenomenon: There is an electric leakage in the submersible pump.

Possible reasons: Damaged cable, decreased insulation performance of the motor, etc.

Solution: Replace the damaged cable, repair the insulation performance of the motor, and ensure compliance with safety standards.

7. Automatic Shutdown

Failure phenomenon: The submersible pump automatically shuts down during operation.

Possible reasons: Overheat protection triggered, phase loss operation, etc.

Solution: Check if the overheat protector is set properly and ensure the three-phase power supply is balanced.

To ensure the normal operation of the submersible pump, regular maintenance should also be noted during daily use, such as cleaning impurities inside the pump casing and checking the integrity of cables and connections. If encountering unresolved failures, it is recommended to contact professional maintenance personnel in a timely manner to ensure personal safety and the normal operation of the equipment.

Previous: The working principle and structure of a submersible pump.

Next: Steps for disassembling and installing a submersible pump

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