基于拟动力学高速角接触球轴承动态特性分析

Analysis on dynamic characteristics of high speed angular contact ball bearing based on quasi-dynamic

为真实地反映高速角接触球轴承的运转情况,建立了高速角接触球轴承拟动力学分析模型,选用BFGS(Broyden-Fletcher-Goldfarb-Shanno)计算方法嵌入高速角接触球轴承拟动力学计算程序,并通过与SKF公司开发的拟动力学分析程序AT74Y001的计算实例进行对比,两者计算误差在5%之内.通过分析不同结构参数合工况参数对轴承动态特性的影响可以得到:随着轴向载荷的增大,内、外圈接触角增大;随着径向载荷的增大,在承载区内圈接触角减小,外圈接触角增大,在非承载区内圈接触角增大,外圈接触角减小;随着转速的增加,轴承内圈接触角的逐渐变大,外圈接触角逐变小;随着钢球数目和轴向载荷的增大,轴承在3个方向刚度逐渐增大;随着内圈沟曲率系数、径向载荷和转速增大,轴承在3个方向刚度逐渐减小.

In order to reflect the real operation of high speed angular contact ball bear- ings, a quasi-dynamic calculation model for high speed angular contact ball bearing was built. BFGS （Broyden-Fletcher-Goldfarb-Shanno） mutative scale optimization was embed- ded in quasi-dynamic calculation program for high speed angular contact ball bearing and then the calculation model proposed was validated as compared with the calculation example in quasi-dynamic calculation program AT74Y001 developed by SKF Corporation, and error be- tween the two ealculation methods was within 5 %. Quasi-dynamic equations were solved to analyze the dynamic performance of high speed angular contact ball bearing under different structural parameters and operating conditions. Results showed that, with the increase of axial load, the contact angle of inner and outer rings increased; with the increase of radial load, the inner contact angle decreased and the outer contact angle increased in the bearing area, while in the non bearing area , the inner contact angle increased and the outer contact angle decreased; with the increase of rotational speed, the inner contact angle increased, andthe outer contact angle decreased; with the increase of the number of steel balls and axial load, the bearing stiffness increased in three directions; with the increase of curvature of inner ring groove of steel balls and radial load and rotational speed, the bearing stiffness decreased in three directions.