Causes and Treatment of Pump Vibration
Vibration Caused by Motor Issues
Fault Diagnosis: Check if the vibration of the motor exceeds that of the pump or if it's solely from the motor.
Treatment: Repair or replace the motor.
Vibration Caused by Cavitation
Fault Diagnosis: Unusual sounds in the pump, such as the friction of sand or stones inside.
Treatment: Clear out any sand or stones in the pump to resolve vibration.
Vibration Caused by Coupling
Fault Diagnosis: Disassemble the column pin and measure if the distance between the pump coupling and the motor coupling holes is consistent.
Treatment: Replace the coupling and column pin.
Vibration Caused by Rotor Wear
Fault Diagnosis: Decrease in pump flow rate after prolonged operation, accompanied by increased current and decreased pressure.
Treatment: Disassemble the pump and inspect the wear and clearance of impellers, throat bushings, guide vanes, and throttle devices. If clearances exceed 1 millimeter, replacement is necessary. Shaft deflection over 0.08 millimeters warrants replacement. Minor wear on impellers can be repaired.
Vibration Caused by Foundation Pipework
Fault Diagnosis: Loose foundation, base vibration exceeding pump vibration, loosened anchor bolts, foundation sinking or cracking.
Treatment: Reconstruct the concrete foundation and tighten anchor bolts.
Vibration Caused by Bearings
Fault Diagnosis: Lack of lubrication in bearings, high bearing temperatures.
Treatment: Add lubricating oil to bearings and reduce bearing temperature.
