Water pump common failure analysis and treatment methods

Different types of pumps have different forms of failure, but in summary, they have the following common characteristics.

1) Insufficient flow: the insufficient flow of the pump is mostly caused by suction pipe leakage and bottom valve leakage; The water inlet is blocked; Bottom valve into the water depth is insufficient; Pump speed is too low; Seal ring or impeller wear is too large; The height of water absorption exceeds the standard.

Treatment method: Check the suction pipe and bottom valve, block the leakage source; Clean up the silt or blockage at the water inlet; The bottom valve into the water depth must be greater than 1.5 times the diameter of the inlet pipe, increase the bottom valve into the water depth; Check the power supply voltage, increase the pump speed, replace the sealing ring or impeller; Lower the installation position of the pump, or replace the high lift pump.

2) Power consumption is too large: the pump speed is too high; The main shaft of the pump is bent or the main shaft of the pump is different or not parallel to the main shaft of the motor; The pump head is not suitable; Pump suction sediment or blockage; Motor ball bearing damage, etc.

Treatment method: Check the circuit voltage, reduce the pump speed; Correct the main shaft of the pump or adjust the relative position of the pump and the motor; Choose the pump with the right lift; Remove sediment or blockages; Replace the ball bearings of the motor.

3) The pump body violent vibration or noise: the pump installation is not strong or the pump installation is too high; Motor ball bearing damage; The main shaft of the pump is bent or different from the main shaft of the motor and is not parallel.

Treatment method: Install the water pump or reduce the installation height of the water pump; Replace motor ball bearings; Correct the bent water pump spindle or adjust the relative position of the water pump and the motor.

4) Drive shaft or motor bearing overheating: lack of lubricating oil or bearing rupture.

Treatment method: fill lubricating oil or replace bearing.

5) The pump does not produce water: the pump body and the suction pipe are not filled with water; The dynamic water level is lower than the water pump filter pipe; Water pipe rupture, etc.

Treatment method: remove the bottom valve fault, fill the water; Reduce the installation position of the pump, so that the filter water pipe is under the dynamic water level, or the dynamic water level rises the filter water pipe and then pumped; Repair or replace the suction pipe.