• CN:11-2187/TH
  • ISSN:0577-6686

›› 1984, Vol. 20 ›› Issue (1): 1-15.

• 论文 •    下一篇

热弹性流体动力润滑椭圆接触问题的完全数值解

朱东;温诗铸;郑林庆   

  1. 清华大学
  • 发布日期:1984-01-01

A FULL NUMERICAL SOLUTION FOR THE THERMOELASTOHYDRODYNAMIC PROBLEM IN ELLIPTICAL CONTACTS

Zhu Dong; Wen Shizhu;Zheng Linqing   

  1. Tsing Hua University
  • Published:1984-01-01

摘要: 本文提出了一个热弹性流体动力润滑椭圆接触问题的完全数值解,并且描述了其相应的求解过程。通过联立求解允许润滑油粘度和密度沿油膜厚度方向变化的一般雷诺方程、弹性方程、润滑油膜的能量方程、固体的热传导方程以及润滑油的粘度方程和密度方程,求解出了不同滚动速度和滑滚比下的油膜压力分布、油膜厚度和形状、油膜内和固体内的三维的温度分布以及接触处的滑动摩擦系数和滚动摩擦系数。所得到的数值结果表明:在一般中、低速情况下,热效应对压力分布、油膜厚度以及滚动摩擦系数的影响较小,但对滑动摩擦系数的影响则相当显著;在接触区外,油膜温升相比之下是微小的,而接触区内的温升明显地随滚动速度和滑滚比的增加而增加;在油膜接触区内,存在着一个形状和位置都与压力峰基本一致的温度高峰区;在固体与油膜之间的两个分界面上,温升一般略低于油膜中层温升,而进入固体以后,温升沿垂直于油膜的方向迅速衰减。本文所研究的问题系稳态问题润滑剂仍被假定为牛顿流体。

Abstract: In this paper a full numerical solution for the thermo-elastohydrodynamic problem in elliptical contacts is presented, and the method of computation is also described. The film pressure, thickness and shape, the three dimensional temperature distribution within both the film and the bounding solids, as well as the coefficients of the sliding and rolling frictions have all been determined for different rolling velocities and slide-roll ratios. The results obtained indicate that the film temperature increases as the rolling velocity or slide-roll ratio increases. The effects of thermal action on the pressure distribution, the film shape and thickness and the friction factors are also given. The problem studied in this paper is steady-state, the lubricant is assumed to be Newtonian.