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兵工学报  2015 

推力球轴承摩擦力矩特性研究

DOI: 10.3969/j.issn.1000-1093.2015.09.003, PP. 1615-1623

Keywords: 机械学,推力球轴承,动力学分析模型,摩擦力矩

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Abstract:

?基于滚动轴承动力学理论,建立了推力球轴承动力学分析模型以及摩擦力矩数学模型,仿真分析了不同结构参数、工况参数对摩擦力矩特性的影响规律,并进行了对比验证。研究结果表明:自旋滑动产生的摩擦力矩约为推力球轴承总摩擦力矩的70%;从推力球轴承的设计角度,在保证保持架稳定性的前提下,可以适当增加钢球数和增大保持架兜孔间隙来减小轴承摩擦力矩,但钢球数对摩擦力矩的影响更为明显,且对轴承结构影响最小,应优先考虑;随着轴(座)圈沟曲率半径系数的增大,轴承摩擦力矩呈现指数形式减小,当轴(座)圈沟曲率半径系数达到0.56以后,轴(座)圈沟曲率半径系数的增大对轴承摩擦力矩影响很小,但考虑到推力球轴承的承载能力,轴(座)圈沟曲率半径系数应在0.56~0.58之间选取较为合适;从推力球轴承的使用角度,倾覆力矩、外载荷冲击量和轴承转速会对轴承的摩擦力矩产生显著影响,且外载荷冲击量的影响程度最大。

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