供油量对对数滚子弹流润滑特性的影响研究

针对现有的凸度设计研究没有考虑供油量因素的现状，研究了供油量对对数滚子弹流润滑特性的影响，指出:在轴向中部，对数滚子的乏油润滑特性与无限长线接触弹流的乏油润滑特性相似；在轴向端部，当供油量较小时，膜厚较小且轴向颈缩不明显；随供油量的增加，膜厚沿滚子轴线方向逐渐由中部向端部增大，轴向颈缩逐步建立，直至形成膜厚的端部闭合效应达到充分供油润滑. 在供油量由乏油到充分供油的变化过程中，压力的边缘效应趋于显著. 因此，充分供油条件下的凸度设计结果不能直接用于乏油工况，乏油时需要的凸度量将小于充分供油润滑的凸度量. 

Oil Supply in EHL Performance for the Logarithmic Profile Roller

Because the factors of oil supply are not taken into account in current crowning design, the influence of oil supply on the elastohydrodynamic lubrication characteristics of logarithmic roller was studied. It was concluded that in the middle of the roller in the axis directions, the lubrication characteristics of logarithmic roller were similar to those of infinite line contact under elastohydrodynamic lubrication. At the axial end, when the oil supply was low, the film thickness was low and the axial oil film neck shrinkage was not obvious. With the increase of oil supply, the film thickness increased gradually from the middle to the end along the axis direction of the roller, and the axial oil film neck shrinkage was gradually established until the end closure effect of the film thickness took into effect,. Therefore, full oil lubrication was reached. The edge effect of pressure tended to be significant in the process from oil starvation to oil enrichment. Therefore, the results of crowning design under fully oil conditions can not be directly applied to oil-starvation conditions, and the crowning value needed in oil-starvation conditions was less than that of fully oil lubrication.