滤波减速器轮齿表面瞬态微观弹流润滑模型

针对滤波减速器接触齿对多、齿间润滑状况复杂这一问题,建立了滤波减速器轮齿弹流润滑模型.该模型综合考虑了啮合齿对载荷分配、齿面几何间隙以及齿面加工粗糙度等因素,并采用牛顿(有限元)法实现了该润滑模型的完全数值解,得到了齿间油膜厚度、油膜压力沿啮合线的分布规律以及粗糙度对轮齿润滑特性的影响.结果表明:齿间油膜厚度和压力沿着啮合线变化,且存在着振荡和突变现象；加工粗糙度会导致齿面油膜厚度减小,润滑情况变差；正弦波状粗糙度表面的压力、膜厚值接近于真实粗糙度表面,一定程度上可以采用正弦波状粗糙度模拟齿面真实加工粗糙度.

Transient Thermal Micro-elastohydrodynamic Lubrication Model of Filtering Reducer

The elastohydrodynamic lubrication (EHL) of filtering reducer was studied by considering the transient effect, detailed realistic contact geometry gap, un-uniformed load distribution and the real machined surface roughness. An internal-meshing lubrication model was established and a completely numerical solution was achieved with Newton-Raphson(FEM) method. The hydrodynamic pressure and film thickness of lubricant along the line of action was calculated and the effect of teeth surface roughness to the lubrication property was also obtained. The results show that disturbance and mutation of hydrodynamic pressure and film thickness exist along the line of action; the values of film thickness at engaging-in, engaging-out and pitch point are different; the thinnest film thickness occurs at the engaging-out point; the largest film thickness occurs at the engaging-in point; the film thickness decreases and the lubrication status becomes worse when the surface roughness is taken into account; the hydrodynamic pressure and film thickness at the condition of sine wave shape surface roughness get closer to the realistic surface roughness, comparing to the smooth surface roughness.