The Energy Dissipation Mechanism And Experiment Of Particle Dampers For Gear Transmission Under Centrifugal Loads

The gear transmission is advancing towards high speed,heavy load and high precision.The requirements for the dynamic performance of gear system are urgently proposed.In gear transmission,the motivation of time-varying mesh stiffness is the crucial factor to cause vibration and noise.As a passive vibration reduction technology,the particle damping dissipates mechanical system energy through inelastic collisions and friction between particles.It is an effective and simple measure for vibration reduction.It has many advantages,such as isotropy,high temperature resistance and less modification to the original structure.At present,the particle damping technology is mainly used in vertical or horizontal steady field,but it is less applied to centrifugal field.The particle system in centrifugal field will show different characteristics.For example,when the centrifugal force is great enough,the particle will be extruded far away from the center.The damping performance of particle damping in centrifugal field is greatly different from vertical and horizontal steady field.Therefore,the energy dissipation mechanism and experiment of particle dampers for gear transmission under centrifugal loads is studied,and the motion characteristics of particles in centrifugal field are revealed.It is of great significance for the application of particle damping in centrifugal field.This paper has conducted the prestressed modal analysis of gear system by the finite element method.Based on the dynamics analysis of gear system,the effect of single tooth and double teeth meshing incentive on gear transmission has been analyzed.The energy dissipation model of particle damping for gear transmission in centrifugal field has been established.The effect of particle size,filling rate,material and the damper configuration on dynamic characteristic of gear transmission system has been analyzed.And the experimental results are consistency with the theoretical analysis.The results show that a proper particle size,filling rate,particle material and damper configuration of powder damper can result in an optimal effect on vibration reduction.Reasonable choice of the above parameters can make the particle damping in the centrifugal field to achieve the best energy consumption damping effect.These results can provide guidelines for the application of particle damping in centrifugal field.