To Solve The Vibration Problem Of The Motor Must Be To The Point

To Solve the Vibration Problem of the Motor Must Be to The Point

Motor and all other machinery and equipment, in the process of operation, there is energy, heat, wear and tear, vibration and other physical and chemical parameters of the transfer and change, these changes in information directly and indirectly reflect the operation of the motor, and vibration can be sensitive to reflect the operation of the motor.

 

Many factors leading to motor vibration, the quality of the motor itself, the motor and equipment matching problems, but also the actual use of the working conditions and so on.

 

In terms of the motor body, from the processing of parts, winding fixed, rotor balancing, parts and components with the link to control, can ensure that the inherent mechanical vibration characteristics of the motor to meet the requirements. In addition to the vibration caused by mechanical factors, electrical causes of vibration is also more common, such as stator-rotor air gap uneven vibration caused by the stator and rotor core is not aligned with the axial runout caused by the power supply frequency caused by resonance and so on. Vibration analysis caused by electrical factors, may be directly judged by cutting off the power supply.

 

Special attention should be paid to the different conditions of use of the motor vibration requirements are not the same, which requires the overall strength of the motor to put forward special requirements, therefore, the supply and demand sides of the full communication is particularly important.

 

 

Motor Vibration Cause Analysis

 

1. Rotor, coupler, coupling, drive wheel uneven street caused.

 

2. Iron core support loose, oblique Jian, pin failure loose, wire-wound rotor binding is not tight, rotor balance is not good, etc. caused by the rotating part of the imbalance.

 

3. Linkage part of the object system is not centered, the center line does not coincide, centering is not correct. The reason for this failure is mainly due to the installation process, poor centering, improper installation.

 

4. The centerline of the linkage part is coincident in the cold state, but after running for a period of time, due to the rotor pivot point, its base and other deformations, the centerline is destroyed and other reasons to produce vibration.

 

5. With the motor connected to the gear, coupling failure, gear bite bad, gear teeth wear serious, coupling skewed, misalignment, tooth coupling tooth shape, tooth distance is not right, clearance is too large or wear serious, will cause a certain amount of vibration.

 

6. Defects in the structure of the motor itself, such as journal oval, bending of the rotor shaft, too large or too small a gap between the shaft and the axial tile, bearing housing, foundation plate, a part of the foundation and even the entire motor mounting base of the rigidity is not enough.

 

7. Insecure fixing between the motor and the base plate, loosening of the foot bolts, loosening between the bearing seat and the base plate, etc.

 

8. The clearance between the shaft and the shaft tile is too large or too small, not only can cause vibration can also make the lubrication and temperature of the shaft tile to produce abnormal.

 

9. Vibration is transmitted by the load that the motor is dragging. For example, motor-driven fans, pumps vibration, caused by motor vibration.

 

10. AC motor stator wiring error, wire-wound asynchronous motor rotor winding short circuit, synchronous motor excitation winding turn-to-turn short circuit, synchronous motor excitation line round connection error, cage-type asynchronous motor rotor broken, rotor core deformation caused by the stator and rotor air gap is not uniform, resulting in air gap flux imbalance and thus cause vibration.