Abnormal vibration and vibration solution in centrifugal pump operation
The solutions to abnormal vibration and vibration in the operation of centrifugal pumps can be summarized as follows:
Causes of abnormal vibration and vibration
Cavitation: When the liquid in the pump chamber contains gas or negative pressure appears at the inlet, cavitation will occur, resulting in severe vibration.
Rotor imbalance: Improper rotor assembly or wear after running for a period of time will reduce the balance accuracy and cause vibration.
Flow channel blockage: Foreign matter is blocked in the impeller flow channel, causing the impeller to be overweight, uneven force, and vibration.
Bearing problem: Bearing damage or excessive clearance will cause unstable rotor movement, vibration and noise.
Installation and support problems: The pump and the base, the base and the foundation are loose, or the coupling connecting the motor and the pump is too low in coaxiality, which will also cause vibration.
Solution
Solve cavitation: Increase the inlet pressure, open the inlet valve, or connect a bypass pipe to increase the effective cavitation margin; ensure that the liquid level in the pump chamber is stable to prevent gas from entering.
Balance the rotor: Perform dynamic balancing correction on the rotor to ensure that it remains balanced during operation; regularly check and replace worn parts.
Clean the flow channel: Regularly clean the impeller flow channel and foreign objects in the pump body to keep the flow channel unobstructed.
Replace the bearing: Regularly check the bearing status and replace the damaged or excessively gapped bearings in time; ensure that the bearings are well lubricated.
Tighten the installation: Check and tighten the connecting bolts between the pump and the base, and the base and the foundation; recalibrate the coupling connecting the motor and the pump to ensure that the coaxiality meets the requirements.
