Maintenance methods for motors

Professional motor maintenance and repair center motor maintenance process: cleaning the stator and rotor - replacing carbon brushes or other components - vacuum Class F pressure impregnation paint - drying - calibrating dynamic balance.

1. The usage environment should be kept dry frequently, the surface of the motor should be kept clean, and the air inlet should not be obstructed by dust, fibers, etc.

2. When the thermal protection of the motor continuously operates, it should be determined whether the fault is caused by the motor being overloaded or the setting value of the protection device being too low. Only after the fault is eliminated can it be put into operation.

3. Ensure good lubrication of the motor during operation. A typical electric motor should be replenished or replaced with lubricating grease after running for about 5000 hours. When bearing overheating or lubrication deterioration is found during operation, the hydraulic system should replace the lubricating grease in a timely manner. When replacing the lubricating grease, the old lubricating oil should be removed, and the oil grooves of the bearing and bearing cover should be cleaned with gasoline. Then, fill the cavity between the inner and outer rings of the bearing with ZL-3 lithium grease at 1/2 (for 2 poles) and 2/3 (for 4, 6, and 8 poles).

4. When the service life of the bearing ends, the vibration and noise of the motor operation will significantly increase. When the radial clearance of the bearing reaches the following values, the bearing should be replaced.

5. When disassembling the motor, it is possible to remove the rotor from either the shaft extension end or the non extension end. If it is not necessary to remove the fan, it is more convenient to remove the rotor from the non shaft extension end. When removing the rotor from the stator, it should be prevented from damaging the stator winding or insulation.

6. When replacing the winding, it is necessary to record the form, size, number of turns, wire gauge, etc. of the original winding. When these data are lost, they should be obtained from the manufacturer. Changing the original design winding at will often worsen the performance of one or several items of the motor, or even render it unusable.