What to do if the sound of the three-phase asynchronous motor is abnormal when it is running

The processing method when the sound of the three-phase asynchronous motor is abnormal or the vibration of the motor is abnormal.

Possible Causes:

(1) Wrong connection of the stator winding, local short circuit or grounding, resulting in unbalanced three-phase current and noise; (2) Foreign matter inside the bearing or serious lack of lubricating oil.

Approach:

(1) Check separately and prescribe the right medicine;

(2) After cleaning the bearings, replace with new lubricating oil for 1/2-1/3 of the bearing chamber.

motor vibration

Possible Causes:

(1) The installation foundation of the motor is uneven;

(2) The motor rotor is unbalanced;

(3) Unbalanced pulley or coupling;

(4) The shaft head is bent or the pulley is eccentric;

(5) The motor fan is unbalanced.

Approach:

(1) Flatten the base of the motor, and fix it after finding the level;

(2) Rotor calibration static balance or dynamic balance;

(3) Balance the pulley or coupling;

(4) Straighten the shaft, straighten the pulley and set the heavy car;

(5) Calibrate the fan.