高速列车轴箱圆锥滚子轴承滚动体的对称修形

基于轴承载荷离散分布计算模型的方法,求出高速列车轴箱圆锥滚子轴承受力最大的滚动体及其所受的最大载荷;采用对数修形曲线进行对称修形,用有限元法对受力最大滚动体进行修形设计的精细研究,在不同工况下分析圆锥滚子与内、外圈之间的最大接触应力沿其母线的分布规律,为高速列车轴箱圆锥滚子轴承的修形优化设计提供了指导.

Mechanical behaviors of cross roller bearings with raceway roundness error

Taking the raceway roundness error into account,mechanical characteristics of cross roller bearings(CRBs)were investigated.A static analysis model of CRBs considering the raceway roundness error was established.Based on this model,the rotational accuracy and load distribution of CRBs under constraints of geometry and external loads were derived.The fatigue life of CRBs with roundness error was calculated by applying Palmgren-Miner linear cumulative damage theory.The influence of inner and outer raceway roundness error on the performance of the CRBs,such as rotational accuracy,load distribution,and fatigue life,was studied through the analysis of examples.The results indicate that the influence of roundness error on the rotating inner raceway is more significant than that of roundness error on the nonrotating outer raceway.The roundness error on the rotating inner raceway always degrades the performance of CRBs.However,a proper roundness error on the nonrotating outer raceway can reduce the loads acting on the rollers and thus improve the fatigue life of CRBs.The effect of the roundness error amplitude on the bearing performance is ordinal,whereas the effect of the roundness order on the bearing performance is not in order.