J. Li, T. Pan, W. Xiao, X. Zhang, Y. Huang
Mechanism and Machine Theory
The vibration from gear engagement is the main source of the noise and vibration of reducers under heavy load and high speed. In order to dissipate the energy as well as suppress the vibration, we introduce the particle damping technology into gear transmission. In this paper, the model of the particle dampers is built in the inherent lighting holes of the gear. By dynamic analysis of gear transmission, the boundary conditions of the centrifugal field are obtained. Then we use the discrete element method to analyze the kinematics and dynamics of the damping particles and determine the relationship between energy dissipation and friction coefficient (surface roughness) of the particles at different rotational speed and load. We come to the conclusion from simulation results that at low rotational speed, smoother particles has better damping effect, while at high speed, rougher particles are better. There is no evident relation between the load and the coefficient of static friction. Finally, the simulation results are verified by experimental results. This conclusion will provide theoretical basis for engineering practice.
centrifugal field, Friction coefficient, gear transmission, Particle damping