Effect of Time-varying Friction Coefficient on Dynamics of Spiral Bevel Gears

Abstract

Abstract:

A generalized 3-dimensional multi-DOF dynamics model for spiral bevel gears was proposed and the influence of time-varying friction coefficient on the gear dynamic responses was analyzed. Mixed EHL model was also proposed to predict the instantaneous friction coefficient at each contact grid cell along the contact zone.

The comparison results to published empirical friction coefficient formulae show that mixed EHL model can predict friction coefficient more accurately.Lastly,comparing to time-varying friction coefficient, constant friction coefficient and without friction case,

the simulation results of dynamic meshing forces and dynamic transmission errors are demonstrated that sliding friction and time-varying friction coefficient have greater effects on dynamics of spiral bevel gears.

Key words: spiral bevel gear, time-varying friction coefficient, mixed elastohydrodynamic lubrication(EHL), nonlinear dynamics, dynamic response

摘要：

建立了弧齿锥齿轮多自由度非线性动力学模型，深入分析了时变摩擦因数对齿轮系统动力学特性的影响。提出了齿轮啮合混合润滑模型，利用该模型计算了齿面啮合区域每个网格点的瞬时摩擦因数。与摩擦因数经验公式法相比，该模型能更准确地预测摩擦因数。对比了时变摩擦因数、常数摩擦因数和不考虑摩擦力三种情况下的动态啮合力和传递误差。研究结果表明，时变摩擦因数对弧齿锥齿轮的动力学特性有重要影响。

关键词:

弧齿锥齿轮, 时变摩擦因数, 混合弹流润滑, 非线性动力学, 动态响应

CLC Number:

TH113.4



WANG Shi-Long, FENG Chi-Heng, LEI Song, XIAO Gong. Effect of Time-varying Friction Coefficient on Dynamics of Spiral Bevel Gears[J]. China Mechanical Engineering, 2011, 22(2): 148-152.

王时龙, 冯治恒, 雷松, 萧红.

时变摩擦因数对弧齿锥齿轮动力学特性的影响

[J]. 中国机械工程, 2011, 22(2): 148-152.

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