双列圆锥滚子轴承接触力学特性分析

Analysis of Contact Mechanics Characteristics of Double Row Tapered Roller Bearing

摘要: 本文针对双列圆锥滚子轴承的接触问题，首先基于轴承载荷计算公式获得轴承载荷分布作为单列轴承分析的载荷边界，其次，基于ANSYS建立最大承载区域的双列圆锥滚子轴承接触分析模型，并分析额定载荷作用下滚子与滚道、滚子与内圈、大挡边、内圈端面的接触力学特性，并与Hertz接触理论验证模型的有效性，在此基础上，开展不同载荷工况下对轴承接触性能的影响。结果表明：在额定载荷下的左侧滚动体与内、外滚道接触应力远远小于疲劳接触应力，轴承不会发生疲劳破坏。此外，径向力增加使轴承内部滚子与滚道、内圈挡边间的接触应力增加，而内圈的端面之间的接触应力反而减小。

Abstract: Contact mechanics characteristics is very important for double row tapered roller bearings. In this paper, the bearing load distribution is obtained based on the bearing load calculation formula as the load boundary for single row bearing analysis, and then, the contact analysis model of double row tapered roller bearing in the maximum bearing area is established based on ANSYS which was validated by Hertz contact theory. The contact mechanical properties of contact between roller and raceway, big end face of inner ring are analyzed. On this basis, the effects of different loads on the contact performance are analyzed. The results show that the contact stress between the left rolling element and the inner and outer raceway is less than fatigue contact stress which will not appear easily to fatigue damage. In addition, the contact stress between the inner roller and raceway and the inner ring ribin creases with the increase of radial force, whereas the contact stress between the end faces of the inner ring decreases.