高速直齿轮摩擦动力学特性分析
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TH132.41

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(国家自然科学基金资助项目(2018NSFC51805100); 广西制造系统与先进制造技术重点实验室基金资助项目(7-259-05S001); 广西研究生教育创新计划资助项目 (YCSW2018034)


Analysis of Tribo-Dynamic Performance for High Speed Spur Gear
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    摘要:

    考虑齿面接触温升的影响,针对高速渐开线直齿轮动力学特性和润滑性能问题,建立摩擦动力学模型剖析齿轮润滑特性与动力学行为的耦合关系以及揭示油膜润滑机理。首先,建立含时变啮合刚度、齿侧间隙、传动误差的多自由度直齿轮弯-扭耦合动力学模型;其次,建立一维线接触瞬态混合热弹流润滑模型,通过整合得到含热效应的直齿轮摩擦动力学模型,利用龙格库塔法与多重网格法的联合迭代求解耦合系统的控制方程;最后,通过静态工况和动态工况数值计算结果的对比、摩擦动力学特性的分析以及温升的对比,证明了建立摩擦动力学耦合模型的必要性,为高速齿轮动态特性和润滑性能的改善提供分析方法。

    Abstract:

    For studying the dynamic characteristics and lubrication performance of high speed involute spur gear, a tribo-dynamic model considering the temperature rise of tooth surface contact is proposed to analyze the coupling relation between lubrication characteristics and dynamic behavior, for revealing the lubrication mechanism. Firstly, a multiple degrees of freedom (DOFs) bending-torsional coupling dynamic model for spur gear is established, which consists of time-varying meshing stiffness, backlash and transmission error. Then, a one-dimensional line contact transient thermalelastohydrodynamic lubrication (TEHL) model is built up. A tribo-dynamic model of spur gear with thermal effect is proposed by means of integration, and an iterative calculation integrated the Runge-Kutta method and the multigrid method is utilized to solve the governing equations of coupled system. Finally, the necessity of establishing tribo-dynamic coupling model is proved by comparing the numerical results of static and dynamic conditions.The analysis of tribo-dynamic characteristics and the comparison of temperature rise, provesthe improvement of dynamic characteristics and lubrication performance of high speed gears.

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  • 在线发布日期: 2020-05-07
  • 出版日期: 2020-04-30
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