Dynamic meshing characteristics analysis of differential gears based on finite element
1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China; 2. Jiangsu Pacific Precision Forging Co., Ltd.， Jiangyan, Jiangsu 225500, China
Abstract： Under two typical conditions during car driving, the rotational speed and the torque distribution of car differential pinion gear and side gear were calculated. Based on the finite element dynamic simulation method, the finite element model was established to simulate the dynamic meshing of differential gears, and the stress distribution of gears was investigated. The influence of friction coefficient between contact surfaces on the stress distribution was analyzed to show that the contact stress was increased with the increasing of friction coefficient. Taking the maximum contact stress of dynamic meshing as static load input, the fatigue life of gears was calculated based on the nominal stress method. The results show that the dangerous position occurs in the gear tooth contact area and the gear tooth root, and the bending fatigue life can meet the design requirements. The fatigue life of differential gears can be effectively predicted by dynamic simulation of gears and fatigue life analysis method.
2017, Vol. 38 
