Balancing the Pump Rotors

The pump rotor is balanced at the time of manufacture.  However, during operation, the rotor dynamics can change.

This can be due to a variety of reasons such as corrosion of the impeller to uneven alignment with the motor.  The impeller can get corroded due to the medium and the environment.  Cavitation caused by pressure fluctuations can also damage the impeller.  Consequently, the rotor of the pump can get unbalanced.

This can result in excessive vibration.  If corrective action is not taken, further damage to the impeller and the pump can result. Damage to bearings is a principal result of excessive vibration.   The vibration levels of the pump should be monitored.  The impeller should be balanced periodically to bring the vibrations within the recommended limits.

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