面接触纹理微单元对油膜承载能力的影响

Effect of Different Micro-textures on Loading Capacity for Area Contact Friction Pairs

为了从理论上深入分析表面纹理对油膜润滑特性的影响,考虑润滑油膜空化的负压效应,建立了含表面纹理平行面接触油膜润滑的计算模型,应用数值差分方法计算分析了凹槽纹理形式和沟槽纹理形式对润滑油膜平均压力的影响规律,给出了各种纹理微单元最佳油膜承载力的尺寸优化参数。结果表明:选择圆孔凹槽、方孔凹槽和方形沟槽等纹理微单元有利于增强油膜承载效果;选择最佳深度和最佳面积比变化范围较大的球面凹槽和斜面沟槽纹理微单元更有利于加工控制。

A theoretical analysis model was developed for area contact friction pairs with different micro-textures considering cavitation within the fluid film between two faces.Numerical simulation method was used to study the effect of geometric parameters of different micro-textures on the load carrying capacity.Results show that the friction pairs with round aperture dimples or square grooves exhibit the best performance,and the friction pairs with the spheric dimples or the inclined grooves are propitious to the processing of LST.