An improved mesh stiffness calculation model of helical gear pair is proposed, in which the transverse gear tooth stiffness, transverse gear foundation stiffness, in addition to axial gear tooth stiffness, axial gear foundation stiffness, that influenced by surface roughness under elastohydrodynamic lubrication (EHL) condition are fully considered. The time varying friction coefficients are obtained by elastoplastic model under varying surface roughness, and then the influence of friction force on mesh stiffness calculation are investigated. The results show that the improved mesh stiffness calculation model could obtain the mesh stiffness under actual lubrication condition compared with conventional method, in which the axial mesh forces and friction forces acting on the gear tooth and gear foundation are always ignored in the mesh stiffness calculation for helical gear pair.

提出了一种改进的斜齿轮副啮合刚度计算模型，其中在弹性流体动力润滑（EHL）下，横向轮齿刚度、横向轮基础刚度以及轴向轮齿刚度、轴向轮基础刚度受表面粗糙度的影响。条件得到充分考虑。通过弹塑性模型得到不同表面粗糙度下的时变摩擦系数，进而研究摩擦力对网格刚度计算的影响。结果表明，与常规方法相比，改进后的网格刚度计算模型能够获得实际润滑条件下的网格刚度，