Abstract With the lubrication conditions deteriorating, sliding friction appears and affects the dynamic performance of planetary gear sets significantly. Furthermore, sliding friction can accelerate tooth surface fatigue and consequently cause many kinds of tooth failures. Spalling defect is a typical tooth failure of planetary gear sets. The influence of the spalling defect on the dynamic performance of planetary gear sets remains unknown when sliding friction is considered. In this paper, a dynamic model is proposed to investigate the dynamics of planetary gear sets with the spalling defect and sliding friction. The dynamic model includes the effect of the time-varying mesh stiffness, mesh damping, sliding friction forces and torques. A planetary gear set with three planet gears is taken as an example to analyze the effect of the spalling defect under sliding friction. Through the simulation analysis, it can be found that the spalling defect and sliding friction have remarkable influence on the dynamic responses of the planetary gear set. Finally, the dynamic model is validated by the experiments. This research establishes the theoretical basis for the diagnosis of the spalling defect of the planetary gear set with sliding friction.

中文翻译：

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剥落缺陷对滑动摩擦行星齿轮组动态性能影响的研究

摘要 随着润滑条件的恶化，出现滑动摩擦并显着影响行星齿轮组的动态性能。此外，滑动摩擦会加速齿面疲劳，从而导致多种齿失效。剥落缺陷是行星齿轮组的典型齿失效。当考虑滑动摩擦时，剥落缺陷对行星齿轮组动态性能的影响仍然未知。在本文中，提出了一个动力学模型来研究具有剥落缺陷和滑动摩擦的行星齿轮组的动力学。动力学模型包括时变网格刚度、网格阻尼、滑动摩擦力和扭矩的影响。以具有三个行星齿轮的行星齿轮组为例，分析了滑动摩擦下剥落缺陷的影响。通过仿真分析可以发现，剥落缺陷和滑动摩擦对行星齿轮组的动态响应有显着影响。最后，通过实验验证了动力学模型。本研究为带滑动摩擦的行星齿轮组剥落缺陷的诊断奠定了理论基础。