滚动轴承稳定工况下的滚动体打滑动力学分析

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摘要打滑是造成滚动轴承表面擦伤甚至失效的重要原因，目前滚动轴承打滑的研究主要集中在恶劣工况，而对正常稳定工况下滚动体的打滑问题关注甚少。针对正常稳定工况下滚动体的打滑问题，考虑径向游隙、保持架兜孔间隙等非线性因素，基于线性压缩弹簧建立滚动体-保持架作用模型，采用分段线性函数描述摩擦系数与滑移速度的关系，建立滚动体打滑非线性动力学模型，分析滚动体在轴承运转过程中的打滑机理及工况参数对滚动体打滑的影响机理。研究结果表明：滚动体在承载区的前段存在急加速现象，存在相对较严重的打滑；滚动体与外圈的滑动相比内圈更严重；轴承转速的增加会增大承载区前段滚动体的打滑速度；载荷增加会降低滚动体打滑程度，缩小滚动体打滑范围。

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关键词 ：滚动轴承, 打滑, 稳定工况, 动力学

Abstract：Skidding is a major contributor to the surface smearing or even failure of rolling bearings. Present research interests are mostly limited to poor operating conditions, while little attention has been paid to skidding issues under stationary conditions. To fill such a gap, a nonlinear dynamic model was established to examine rolling elements’ skidding behaviors under normal stable conditions, taking into account nonlinear factors such as the radial clearance and cage pocket clearance. In the model, the interaction between the rolling elements and cage was modeled as a linear compression spring, whereas the friction coefficient and sliding velocity were depicted using piecewise linear functions. The skidding mechanism of rolling elements during running stage and the influence of working conditions were studied using the proposed dynamic model. The results show that rolling elements experience a rapid speeding-up stage as they get into the front part of loaded zone, and thus have a severe skidding. Moreover, the skidding increases with the bearing rotating speed in this period. The skidding of rolling elements on outer race is more serious than that on inner race. In addition, the load on bearings has an inverse impact on the skidding degree and the skidding areas will reduce with the load increasing.
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Key words： Rolling element bearing Skidding Steady working condition Dynamics

收稿日期: 2017-10-18 出版日期: 2019-03-15

引用本文:

涂文兵，何海斌，罗丫，肖乾. 滚动轴承稳定工况下的滚动体打滑动力学分析[J]. 振动与冲击, 2019, 38(6): 94-99.
TU Wenbing He Haibin LUO Ya XIAO Qian. Dynamic skidding behavior of rolling elements under bearing steady working conditions. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(6): 94-99.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I6/94

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