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在15万转/分的转速范围内,对角接触陶瓷球轴承及钢球轴承的接触角、接触应力、内圈位移、旋滚比和刚度的变化特性进行了全面的对比分析。根据滚动轴承分析理论建立了数学模型并采用数值方法求解。分析结果表明:在研究的转速范围内,以上各性能参数均呈现显著的非线性变化特征,其变化特性与转速和滚珠材料类型密切相关;在轴向外载作用下,轴承内圈沿轴向移动,随转速升高,轴向移动量先小幅降低而后急剧增大;轴承径向刚度及轴向刚度值也是先下降而后上升,且变化范围较大。陶瓷球混合轴承几乎在所有的性能参数均明显优于传统的钢球轴承。与传统钢球轴承相比,其接触应力和内圈移动量明显降低、接触角变化较小、轴向与径向刚度变化程度相对较低、动态特性相对稳定,从而具有传统钢球轴承无可比拟的优越性。
The contact angle, contact stress, displacement of the inner ring, the ratio of roll to roll and the change of stiffness of the ceramic ball bearings and the ball bearings are analyzed in detail in the speed range of 150,000 rpm. According to the theory of rolling bearing, a mathematical model is established and solved by numerical method. The results show that all of the above performance parameters exhibit significant nonlinear variation within the investigated speed range, and their variation characteristics are closely related to the rotational speed and ball material type. Under the axial external load, the bearing inner ring rotates in the axial direction As the speed increased, the amount of axial movement decreased slightly and then increased sharply. The radial and axial stiffness of the bearing also decreased first and then increased with larger variation. Ceramic ball hybrid bearings are significantly better than traditional ball bearings in almost all performance parameters. Compared with the traditional steel ball bearings, the contact stress and the inner ring movement significantly reduced, the contact angle changes smaller, the axial and radial stiffness changes relatively low, the dynamic characteristics of relatively stable, so with the traditional ball bearings no Compared to the superiority.