Fault 1:The pump does not produce water, and the needle of the pressure gauge beats violently
Possible causes:
1. The water level is lower than the rear cover plate of the first impeller.
2. Air leakage from pipelines or instruments.
Treatment method: 1. Increase the water level or increase the depth of the pump.
2. Tighten or plug the air leakage.
Fault 2:The pump does not produce water, and the pressure gauge shows that there is pressure
Possible causes:
1. The pressure of the outlet pipeline is too large.
2. The direction of rotation is wrong.
3. The speed is not enough.
Treatment method: 1. Check or shorten the outlet pipeline.
2. Correct the direction of rotation of the motor.
3. Check the power supply voltage. Increase the rotational speed.
Fault three:The flow rate is insufficient or the head is too low
Possible causes:
1. The impeller or water inlet pipeline is blocked.
2. The sealing ring is worn too much or the impeller is damaged.
3. The speed is lower than the specified value.
Treatment method: 1. Clean the impeller or pipeline.
2. Replace damaged parts.
3. Adjust to the rated speed.
Fault four:The pump consumes too much power
Possible causes:
1. The filler is pressed too tightly.
2. Insufficient lubrication of the guide bearing.
3. Friction of the sealing ring.
4. The flow is too large.
5. The medium contains too many impurities.
Treatment method: 1. Loosen the packing gland.
2. Increase the pressure and flow rate of lubricating water.
3. Check the cause and eliminate mechanical friction.
4. Check the opening of the gate valve.
5. Control the impurity mass or increase the supporting power.
Fault five:The sound inside the pump is abnormal, and the pump cannot be watered
Possible causes:
1. The guide bearing is seriously worn.
2. The temperature of the pumping liquid is too high.
3. The pump flow is too large.
Solution: 1. Replace the worn guide bearing.
2. Reduce the temperature of the liquid.
3. Reduce the flow rate.
Fault Six:The pump is vibrating abnormally
Possible causes:
1. The guide bearing is damaged.
2. The pump shaft is not concentric with the motor.
3. The anchor bolt is loose.
4. The pump shaft is deformed or the coupling joint is loose or damaged.
Solution: 1. Replace the damaged guide bearing.
2. Correct the concentricity of the two.
3. Tighten or re-pour.
4. Replace the shaft or coupling.
Fault Seven:The rolling bearing is overheated
Possible causes:
1. Insufficient lubrication of rolling bearings.
2. The pump shaft is not concentric with the motor.
3. The flow head is too large, and the pump is overloaded.
Solution: 1. Check the oil cup and add lubricating oil.
2. Correct the concentricity of the two.
3. Reduce flow rate and head.