Vibration is a very critical performance index requirement for motor products, especially for some precision equipment and places with high environmental requirements, the performance requirements for motors are more stringent or even severe.
Regarding the vibration and noise of motors, we have also had many topics, but from time to time there are always some new or personalized information input, which triggers our re-analysis and discussion.
In the process of motor production and processing, rotor dynamic balance, fan static balance, balance of large motor shaft, and precision of machined parts all have a great influence on the vibration performance of the motor, especially for high-speed motors, the accuracy and suitability of the balancing equipment It has a great influence on the overall balance effect of the rotor.
Combined with the case of the faulty motor, it is necessary for us to summarize and summarize some problems in the dynamic balancing process of the rotor. Most cast aluminum rotors are dynamically balanced by adding weight on the balance column. During the balancing process, the matching relationship between the balance block hole of the counterweight and the balance column, and the reliability of the balance and fixation must be controlled in place; It is suitable to use some rotors with balance blocks. Most manufacturers use balance cement for balance. If deformation, displacement or falling off occurs during the curing process of the balance cement, the final balance effect will deteriorate, especially for the motors that are put into use. Severe vibration problems with the motor.
The installation of the motor has a great influence on the vibration performance. The installation reference of the motor should ensure that the motor is in a stable state. However, in some applications, it can be found that the motor is in a suspended state and even has adverse effects of resonance. Therefore, the installation reference of the motor The motor manufacturer shall communicate with the user as necessary to reduce and eliminate such adverse effects. It should be ensured that the installation reference has sufficient mechanical strength, and the matching relationship and positional relationship between the installation reference and the installation effect of the motor and the driven equipment must be ensured. If the foundation of the motor installation is not solid, it is easy to cause motor vibration problems, and in severe cases, it will cause the bottom of the motor to break.
For the motor in use, the bearing system should be maintained regularly according to the maintenance requirements. On the one hand, it depends on the performance of the bearing, and on the other hand, it depends on the lubrication of the bearing. The damage of the bearing system will also cause the vibration problem of the motor.
For the control of the motor test process, it should also be based on a reliable and firm test platform. For problems such as uneven platform, unreasonable structure, or even unreliable foundation of the platform, it will lead to distortion of vibration test data. This problem must cause the test agency to of great importance.
During the use of the motor, the fastening of the fixed point between the motor and the foundation should be checked, and necessary anti-loosening measures should be added when fastening.
Similarly, the operation of the dragged equipment has a direct impact on the operation of the motor. Therefore, for the vibration problem of the motor during use, the state verification of the equipment should be used to identify and analyze and solve the problem in a targeted manner.
In addition, the misalignment problem that occurs during the long-term operation of the motor also has a greater impact on the vibration performance of the motor. Especially for large-scale motors that are suspended, regular maintenance and maintenance are the key to preventing vibration problems.
Post time: Mar-22-2023