Three common faults and solutions for pumps


1. Can not start First check the power supply: whether […]

1. Can not start
First check the power supply: whether the connector is secure; whether the switch is tight; whether the fuse is blown; whether the three-phase power supply is equal. If there is an open circuit, poor contact, blown fuse, or lack of phase, the cause should be identified and repaired in time. Secondly, check whether it is the mechanical failure of the pump itself. The common reasons are: the packing is too tight or the impeller and the pump body are stuck by the debris; the pump shaft, the bearing and the leak-reducing ring are rusted; the pump shaft is severely bent. Remedy: loosen the packing, dredge the water tank; disassemble the pump body to remove debris and rust; remove the pump shaft to correct or replace the new pump shaft.
2.Pump heating
Cause: The bearing is damaged; the gap between the rolling bearing or the bracket cover is too small; the pump shaft is bent or the two shafts are not concentric; the tape is too tight; the oil or oil is not good; the balance hole on the impeller is blocked, the impeller is out of balance, and the direction is increased. The thrust on one side. Remedy: Replace the bearing; remove the rear cover, install a gasket between the bracket and the bearing housing; investigate the pump shaft or adjust the concentricity of the two shafts; adjust the tightness of the tape properly; add clean butter, butter accounts for the bearing About 60% of the inner space; remove the blockage in the balance hole.
3. Insufficient flow
This is because: the power speed is not matched or the belt slips, so the speed is low; the axial pump blade installation angle is too small; the head is insufficient, the pipeline is too long or the pipeline has a right angle bend; the suction stroke is high; the bottom valve, the pipeline And partial impeller or impeller defect; the water leakage of the outlet pipe is serious. Remedy: Restore rated speed, remove belt grease, adjust belt tightness; adjust blade angle, reduce pump installation position, shorten pipeline or change pipeline bending; seal pump leak, compact packing; clear blockage Replace the impeller; replace the leak-reducing ring and block the leak.