An Improved Mesh Stiffness Analytical Model Considering Center Distance Variation Caused by Shaft Misalignment

Shaft misalignment is a common installation error of gear transmission system, which changes the meshing stiffness and increases the risk of premature failure of gear. Establishing an analytical model for calculating the stiffness of gear with misalignment errors is of great significance for accurately studying the dynamic response. However, the traditional model ignores the change of center distance caused by angle misalignment error. In order to solve this problem, a new stiffness analytical model considering misalignment error based on the slice method is proposed, the effect of center distance change on gear meshing angle and contact ratio is considered. The influence of misalignment error parameters on gear meshing stiffness is analyzed. The results show that the influence of meshing state change caused by misalignment error on gear meshing stiffness is more significant and cannot be ignored, and in the y direction and comprehensive direction, as the misalignment angle increases, the coincidence degree becomes smaller. This study can provide a basic theoretical basis for identification and evaluation of misalignment errors.