对数母线滚子光弹流润滑的实验研究

为了研究对数母线滚子凸度量对滚子摩擦副润滑油膜的影响 ,本文在自制的有限长线接触光干涉弹流试验机上 ,测量了中载、富油润滑和纯滚动工况下对数修形圆锥滚子与玻璃盘之间的油膜形状与膜厚。实验结果表明对数母线轮廓滚子的凸度量对其端部的油膜厚度和膜形分布有较大的影响 ,在给定的工况条件下 ,存在一个使滚子轴向油膜厚度最为均匀的最佳凸度量 ,此最佳凸度量比在相同工况条件下用静弹性接触力学方法求得的最佳凸度量大

Optical Interferometry Studies of the Oil Film in Logarithmic Profile Roller Contacts

It is well known that rollers in roller bearing are slightly modified toward the ends in order to overcome edge stress concentrations caused by finite length and misalignment. In order to study the effects of crowning amount of logarithmic profile rollers on the elastohydrodynamic lubrication, an optical interferometry method is applied to measure the oil film thickness between a profile taper roller and a glass plate under pure rolling, generous oil supply, not too high rolling speed, moderate load and material parameters conditions. It was found from the experiments that there is an optimum crowning value which will induce the thickest and most even oil film in EHL state for a given working condition, and this value is larger than the design value in dry contact state for the same working conditions.