大型滚动轴承承载特性与滑差演变规律研究

Research on Load Distribution and Skidding Mechanism of Large Rolling Bearing

以往打滑分析大多侧重对超高转速极轻载荷工况中的滚动轴承进行分析,此处重点针对相对转速较低而载荷较高的大型滚动轴承打滑机理进行研究。以风电轴承为例,构建了轴承承载特性与滑差分析理论模型,研究了径向游隙、滚子有效长度、滚子数对滚动轴承内部接触载荷分布的影响规律,结果表明径向游隙和滚子数对滚动轴承最大承载滚子接触载荷的影响相比滚子有效长度而言更为显著。在载荷分布特性研究的基础上,基于正交试验法系统研究了径向载荷、内圈转速、滚子直径、径向游隙、润滑油黏度等不同因素对轴承滑差演变的影响权重及其影响机理,研究发现各种滑差组合参数对轴承滑差生成与演变影响权重不同,其中径向载荷对滑差影响最为显著。

Skid analysis mainly concentrated on the ultra-high speed and light load rolling bearing in the past. In this paper, the load distribution and skid mechanism of large rolling bearing with relatively low speed and heavy load were studied. The load distribution and skid analysis model of rolling bearing in wind turbine were built, and the bearing load distribution characteristics were analyzed in terms of various factors such as radial clearance, effective length of roller and number of roller, the result showed that radial clear- ance and number of roller have more significant influence on load distribution than effective length of roller. Based on the orthogonal experiment method, the skidding mechanism were investigated systematically in terms of various factors such as radial load, inner ring speed, roller diameter, radial clearance and lubricant viscosity, the result showed that the radial load has the most significant influence on bearing skid.