华南理工大学学报（自然科学版） ›› 2013, Vol. 41 ›› Issue (11): 134-148.doi: 10.3969/j.issn.1000-565X.2013.11.024

• 汽车工程 • 上一篇    下一篇

轿车轮毂轴承实际工况下的弹流脂润滑数值分析

陈英俊 黄平   

  1. 华南理工大学 机械与汽车工程学院，广东 广州 510640
  • 收稿日期:2013-05-16 修回日期:2013-07-05 出版日期:2013-11-25 发布日期:2013-10-11
  • 通信作者: 陈英俊(1979-)，男，博士生，讲师，主要从事润滑及微机电系统理论与应用研究． E-mail:chen.sam@mail.scut.edu.cn
  • 作者简介:陈英俊(1979-)，男，博士生，讲师，主要从事润滑及微机电系统理论与应用研究．
  • 基金资助:

    国家自然科学基金资助项目 (51175182);清华大学摩擦学国家重点实验室开放基金重点资助项目(SKLTKF12B14);茂名市科技计划项目(20120259)

Numerical Analysis of Grease Elastohydrodynamic Lubrication of Automotive Wheel Hub Bearing Under Actual Working Conditions

Chen Ying- jun Huang Ping   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-05-16 Revised:2013-07-05 Online:2013-11-25 Published:2013-10-11
  • Contact: 陈英俊(1979-)，男，博士生，讲师，主要从事润滑及微机电系统理论与应用研究． E-mail:chen.sam@mail.scut.edu.cn
  • About author:陈英俊(1979-)，男，博士生，讲师，主要从事润滑及微机电系统理论与应用研究．
  • Supported by:

    国家自然科学基金资助项目 (51175182);清华大学摩擦学国家重点实验室开放基金重点资助项目(SKLTKF12B14);茂名市科技计划项目(20120259)

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被引次数

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摘要： 轿车轮毂轴承实际工况下的脂润滑因基础黏度大、非牛顿特性强烈、当量接触曲率半径小，其弹性流体动力润滑计算有很大困难．文中在推导脂润滑弹流润滑计算基本方程的基础上，对方程进行了无量纲化和差分求解，求得轮毂轴承脂润滑弹流润滑的数值解，得到了润滑膜的压力分布和膜厚形状．结果表明: 轮毂轴承脂润滑弹流润滑膜具有与油润滑类似的二次压力峰和出口膜厚颈缩现象; 较小的载荷、较高的速度或较大的流变指数会形成较厚的润滑膜，相应的二次压力峰也更加明显; 滚珠与滚道间的润滑实际处于弹流润滑和边界润滑交替变换的状态

关键词: 轿车轮毂轴承, 弹性流体动力润滑, 边界润滑, 脂润滑, 数值分析

Abstract:

Due to the high initial viscosity,obvious non- Newtonian property and small equivalent radius in thegrease lubrication of automotive wheel hub bearing under actual working conditions,great difficulties arise in thecorresponding elastohydrodynamic lubrication (EHL) calculation.In order to solve this problem,basic grease lu-brication equations are derived,non- dimensionalized and difference- solved sequentially.After that,the numericalsolutions of EHL of greased and lubricated wheel hub bearing,such as the pressure distribution and the thicknessshape of lubrication film,are obtained.The results show that (1) in greased and lubricated wheel hub bearings,there exist a second pressure peak and thickness necking similar to those under oil lubricated condition; (2) lightload,high velocity and large rheological exponent all help to form thicker lubrication film with a more obvious se-cond pressure peak; and (3) the lubrication between the rolling ball and the rolling cave is actually in an alternatestate of EHL and boundary lubrication.

Key words: automotive wheel hub bearing, elastohydrodynamic lubrication, boundary lubrication, grease lubrica-tion, numerical analysis

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