Dynamic Balance Correction and Vibration Attenuation on Motor Reducers Containing Damping Particles

Gear-reduction motors (motor reducer) have been widely applied in industrial equipment in collocation with AC electric power due to their characteristics of compact size and high output torque, as well as their advantages of low noise and vibration, and no oil leakage in operation. With technological advancement, vibration criteria for the gear-reduction motor has become more rigorous in automatic machines. Dynamic imbalance of the motor rotor is a factor causing machine vibration, which would affect working efficiency and service life of the reducer. As known, vibration suppression using damping particles is a kind of passive and nonlinear energy dissipation technology, which has been applied to improve vibration and noise. This project aims to either correct dynamic balance or attenuate machine vibration of the reducer through reasonably design particle-damping devices on the motor rotor and distribute different particle percents in different containing cavities of these devices based on the particle damping technology. In addition, the two-way-coupled DEM (Discrete Element Method)-MBD (Multi-body Dynamics) analysis technology will be employed to investigate the effects of geometry and size on particles and cavities, friction and restitution coefficients of particles on the reducer dynamic behaviors, and predict the improved results. Practical loaded tests on the motor reducer will also be conducted to evaluate the improved achievements on the vibration acceleration and the dynamic imbalance amount.