The meshing characteristics of planetary gear transmission system considering the effects of load and system parameters

In order to investigate the effects of load and system parameters on the planetary gear system, this paper develops a nonlinear time-varying dynamic model of a 12-degree-of-freedom planetary gear system. The model is employed to analyze the influence of load and system parameter variations on the meshing force, kinetic energy, strain energy, and load-sharing coefficient. The results demonstrate that the unbalance exacerbates tooth collision and increase the peak meshing force. Increasing the load will reduce the tooth collision and enhances the load sharing coefficient of the system. Decreasing the tooth side clearance, the unilateral tooth collision will be transformed into bilateral collision and mitigates the fluctuation of the meshing force. Additionally, increasing the transmission error amplifies the magnitude and fluctuation of the strain energy but reduces the system’s load-sharing coefficient.