Effects of contact ratios on mesh stiffness of helical gears for lower noise design

Abstract

In this paper, the influences of various gear parameters on the mesh stiffness are systematically investigated by using the finite element method. The comprehensive analysis shows that contact ratios are the key factors affecting the fluctuation value of mesh stiffness. By comparatively analysing the length of contact lines of various helical gear pairs with different basic parameters, the results show that the fluctuation value of mesh stiffness attains a minimum when the transverse contact ratio or overlap ratio is close to an integer, while it fluctuates more intensively when the total contact ratio is an integer.