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2021-12-24

MT3 1221 Water pump tells the reason for the abnormal vibration of the water pump motor


Do you know the cause of the abnormal vibration of the pump motor? Follow the editor of MT3 1221 Water pump to have a simple understanding!
1. It is caused by the imbalance of the rotor, coupler, coupling, and transmission wheel (brake wheel).
2. The iron core bracket is loose, the oblique key and the pin are ineffective and loose, and the rotor is not tightly bound, which will cause the rotating part to be unbalanced.
3. The shaft system of the linkage part is not centered, the center line does not coincide, and the centering is incorrect. This kind of failure is mainly caused by poor alignment and improper installation during the installation process.
4. The center line of the linkage part coincides in the cold state, but after a period of operation, due to the deformation of the rotor fulcrum and foundation, the center line is destroyed again, and vibration occurs.
5. The gears and couplings connected to the motor are faulty, the gears are badly engaged, the gear teeth are severely worn, the lubrication of the gears is poor, the coupling is skewed, misaligned, the gear coupling is wrong, the tooth pitch is wrong, and the gap is too large. Large or severe wear will cause a certain amount of vibration.


6. Defects in the structure of the motor itself, the shaft journal is elliptical, the rotating shaft is bent, the gap between the shaft and the bearing bush is too large or too small, the rigidity of a certain part of the bearing seat, foundation plate, foundation and even the entire motor installation foundation is insufficient.
7. Installation problems: the motor and the base plate are not firmly fixed, the foot bolts are loose, and the bearing seat and the base plate are loose.
8. Excessive or too small clearance between the shaft and the bearing bush can not only cause vibration, but also cause abnormal lubrication and temperature of the bearing bush.
9. The load driven by the motor conducts vibration, such as the vibration of the fan and water pump driven by the motor, which causes the motor to vibrate.
10. Stator wiring error of AC motor, short circuit of rotor winding of winding asynchronous motor, short circuit of excitation winding of synchronous motor, wrong connection of excitation coil of synchronous motor, broken bar of cage asynchronous motor, rotor core deformation, resulting in air gap between stator and rotor Even, resulting in an unbalanced air gap magnetic flux and causing vibration.
The above is the editor of MT3 1221 Water pump: the reason for the abnormal vibration of the water pump motor.