What are the Causes of Abnormal Motor Vibration? How to Repair?

20Dec

What are the Causes of Abnormal Motor Vibration? How to Repair?

 

What are the Causes of Abnormal Motor Vibration? How to Repair?

 

Causes of Abnormal Motor Vibration:

1. Electromagnetic Vibration

If the power is cut off and the vibration disappears, it is generally electromagnetic vibration.

2. Mechanical Vibration

If the power is cut off and the vibration does not disappear, this is mechanical vibration.

Maintenance Method:

1. Disassemble the connection with the working machinery

After disconnecting the connection with the working machine, if the abnormal vibration disappears, it means that the connection part is not well connected. When the belt wheel is set, pay attention to the parallelism of the shaft, the tension of the belt, etc.

2. Check the base and installation feet

The cause of abnormal vibration cannot be found even if it is operated alone. You can use torque spanner and spanner to check whether the foundation bolts and motor mounting bolts are loose. If they are loose, tighten them.

3. The rotor is not well balanced

According to the above order can not check the cause of vibration, it is necessary to consider whether the rotor is not well balanced.

Due to aging of winding insulation, binding relaxation and so on, the balance of the rotor becomes poor. If the cause of motor vibration is rotor imbalance, the vibration state varies with speed, and the vibration value is probably not reproducible. Remove the rotor and observe with naked eyes, check the hand hammer against the strap, and listen to its sound to determine if there is a problem.

 

Causes of Abnormal Motor Vibration:


1. Electromagnetic Vibration


If the power is cut off and the vibration disappears, it is generally electromagnetic vibration.


2. Mechanical Vibration


If the power is cut off and the vibration does not disappear, this is mechanical vibration.


Maintenance Method:


1. Disassemble the connection with the working machinery


After disconnecting the connection with the working machine, if the abnormal vibration disappears, it means that the connection part is not well connected. When the belt wheel is set, pay attention to the parallelism of the shaft, the tension of the belt, etc.


2. Check the base and installation feet


The cause of abnormal vibration cannot be found even if it is operated alone. You can use torque spanner and spanner to check whether the foundation bolts and motor mounting bolts are loose. If they are loose, tighten them.


3. The rotor is not well balanced


According to the above order can not check the cause of vibration, it is necessary to consider whether the rotor is not well balanced.


Due to aging of winding insulation, binding relaxation and so on, the balance of the rotor becomes poor. If the cause of motor vibration is rotor imbalance, the vibration state varies with speed, and the vibration value is probably not reproducible. Remove the rotor and observe with naked eyes, check the hand hammer against the strap, and listen to its sound to determine if there is a problem.