歪斜状况下对数修形圆锥滚子轴承的凸度分析与仿真
Crowning Analysis and Simulation of Tapered Roller Bearings with Logarithmic Profile in Skew Condition

针对对数修形的高铁圆锥滚子轴承在运行时滚子产生的歪斜现象，根据弹性接触理论，建立了圆锥滚子轴承滚子与内/外滚道在歪斜状况下的接触几何模型。利用切片法对单个滚子/滚道进行数值计算，分析了歪斜对滚子接触应力分布的影响，计算了歪斜状况下滚子的最佳凸度量。通过MATLAB仿真得出，歪斜角较小时，增加凸度量可降低歪斜效应引起的应力集中，歪斜角较大时，修形的方法不能改善滚子的应力集中，应避免滚子大角度歪斜。
The tapered roller bearings with logarithmic profile in railway generate the skew phenomenon during working. A contact model between roller and inner/outer race under skewing condition was established based on the elastic contact theory. The contact stress distribution of tapered roller was calculated numerically through the cutting-slice method. The effect of skew on the stress distribution of roller has been analyzed and the optimum crowning value in skew condition has been calculated. MATLAB simulation Results show that when the skew angle is small, stress concentration can be appropriately modified by increasing crowning value; and the large skew angle should be avoided, because the increased crowning can't alleviate roller's stress concentration