作者:赵彦玲,张晓楠,秦生
Authors:ZHAO Yan-ling,ZHANG Xiao-nan,QIN Sheng摘要:摘要:针对无保持架球轴承滚动体之间接触碰撞的问题，提出在外圈滚道设计变速曲面，使滚动体有规律地进行减速、加速运动，进而使滚动体自动分散。分析了滚动体在径向载荷作用下时变位移规律，基于Hertz理论对轴承各零件间的作用力进行分析，建立了滚动体与局部变速曲面之间的接触力方程，揭示了变速曲面环向跨度角与接触力之间的关系，并进行变速曲面结构参数的设计。基于改进无保持架球轴承几何参数进行动力学虚拟仿真验证，分析任意3组相邻滚动体分散间距和任一滚动体加速度变化曲线，验证了变速曲面结构参数设计的正确性。本文的研究成果对无保持架球轴承的设计具有一定的指导意义。
Abstract:Abstract:During the operation of cage-free bearing, the contact collision between the adjacent rollers may reduce the bearing life. Therefore, this paper propose the design of variable speed surface in outer ring raceway so that rollers can decelerate and accelerate regularly, and then rollers can be dispersed automatically. This paper specifically analyzes the time-varying displacement law of rolling body under radial load and the force between each bearing component. Based on Hertz theory, the equation of contact force between the roller and variable speed surface is established, and the variation of contact force during the rolling motion is revealed to determine the circumferential span angle of variable speed surface, which can be used to design the structural parameters of variable speed surface. Based on simulated analysis of the improved cage-free bearing geometry parameters, this work verifies the correctness of structural parameters design of variable speed surface by analyzing and comparing the changing curves that the dispersion spacing of any three groups adjacent roller and acceleration of any roller. The research results of this paper have certain guiding significance for the design of cage-free bearing.

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