基于简化Jones-Harris方法的球轴承接触角研究

作为球轴承重要的结构参数之一，接触角对轴承组件的载荷分布、运动关系、润滑、摩擦等都有重要的影响。将求解惯性力所涉及的变量耦合关系进行简化，提出了用于研究球轴承接触角特性的简化Jones-Harris方法(SJHM)，通过预先给定内圈偏转角，克服了直接迭代法难以考虑内圈偏转角对接触角影响规律的不足。以b218轴承为对象，验证了SJHM方法的有效性；在此基础上，分析了多种因素对接触角的影响规律。研究结果表明：相比陀螺力矩的影响，离心力对内、外接触角的影响更加显著；接触角对轴承内圈偏转角的变化非常敏感，内圈偏转角会使同一个滚动体的内、外接触角同时增大或减小。

Research on contact angle of ball bearings based on simplified Jones-Harris method

As one of the important structural parameters of ball bearings, the contact angle has a great impact on load distribution, motion, lubrication, friction et al. of bearing components. Based on the simplification of coupled relations of variables as deriving the inertia force, a simplified Jones-Harris method(SJHM) used to research the characteristics of contact angle in ball bearings is put forward. The disadvantage of direct iteration method to get the influence of inner-race deflection angle on contact angle is overcome through giving the deflection angle in advance. The validity of SJHM is verified by the calculating example of b218 bearing. Then, the influences of multiple factors on contact angle are analyzed. Results manifest: the centrifugal force has a much greater impact on the inner and outer contact angles than gyroscopic moment; the contact angle is very sensitive to the variations of inner-race deflection angle and the inner-race deflection angle can make the inner and outer contact angle of the same rolling element increase or decrease simultaneously.Key words: ball bearings; contact angle; simplified Jones-Harris method; inner-race deflection angle; inertia force