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定压预紧下角接触球轴承的动力学建模方法

Keywords: 角接触球轴承,Hertz接触理论,定压预紧,动态接触参数集,电主轴

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Abstract:

针对定压预紧下的角接触球轴承在动态条件下的接触状态进行动力学建模.分析了定压预紧机理和受力特点,考虑了陀螺力和离心力的影响,基于Hertz接触理论,提出了一种角接触球轴承动态非线性模型的建模方法.通过对模型的数值迭代,确定了角接触轴承的动力学参数以及包括轴承内外圈在动态情况下的法向接触力、接触角、最大压应力、轴向位移、接触斑点和刚度值等动态接触参数集.设计了一个装有定压预紧轴承组的试验台,通过预紧力和转速调整,测量轴承在不同工况下内外圈的相对位移,与构建的模型进行了比对,验证了建模方法的正确性,为轴承生热量和疲劳寿命分析提供了理论依据.

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