How to find the cause of vibration
1. Before the motor is not stopped, check the vibration of each part with the vibration meter. For the vibration part, test the vibration value in three directions of vertical horizontal axis. If the ground screw is loose or the bearing end cover screw is loose, Directly tighten, measure the vibration after tightening, and observe whether it is eliminated or lightened.
Secondly, it is necessary to check whether the three-phase voltage of the power supply is balanced, and whether the three-phase fuse has a blown phenomenon. The single-phase operation of the motor can not only cause vibration, but also cause the temperature of the motor to rise rapidly, and observe whether the current meter pointer swings back and forth, and the rotor is broken. There is a current swing phenomenon.
Finally, check whether the three-phase current of the motor is balanced. If problems are found, contact the operation personnel in time to stop the motor running, so as not to burn the motor.
2. If the motor vibration is not solved after the surface phenomenon is processed, continue to disconnect the power supply, uncoupling the coupling, and separate the load connected to the motor, and turn the motor.
If the motor itself does not vibrate, it means that the vibration source is caused by the coupling not being aligned or the load machine. If the motor vibrates, it means that the motor itself has a problem.
In addition, the power-off method can be used to distinguish between electrical reasons and mechanical reasons. When the power is cut off, the motor does not vibrate or the vibration is relieved immediately, indicating that it is an electrical cause, otherwise it is a mechanical fault.
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