| 弹流润滑中局部油膜增厚的数值模拟 |
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| 引用本文： | 郭峰,杨沛然,曲十月. 弹流润滑中局部油膜增厚的数值模拟[J]. 机械工程学报, 2000, 36(4): 17-20 |
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| 作者姓名： | 郭峰 杨沛然 曲十月 |
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| 作者单位： | 青岛建筑工程学院机械工程系,青岛,266033 |
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| 基金项目： | 山东省自然科学基金资助项目(Y97F05089). |
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| 摘 要： | 通过理论计算模拟了Kaneta等在光干涉弹流试验中观察到的,当接触区钢球表面和玻璃盘表面反向运动时出现的反常油膜局部增厚现象,即润滑固体表面在接触区出现凹陷.对钢球-玻璃盘接触副进行了热弹流问题的完全数值求解,发现润滑中的热效应是形成凹陷的根本原因.当盘快球慢时有凹陷出现;而盘慢球快时无凹陷出现.讨论了凹陷的深度、位置和形状随运动条件、粘压系数及载荷等的变化.
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| 关 键 词： | 弹性流体动力润滑 热效应 凹陷 |
| 修稿时间： | 1999-03-25 |
NUMERICAL SIMULATION OF THE LOCAL FILM THICKENING IN EHL |
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| Guo Feng,Yang Peiran,Qu Shiyue. NUMERICAL SIMULATION OF THE LOCAL FILM THICKENING IN EHL[J]. Chinese Journal of Mechanical Engineering, 2000, 36(4): 17-20 |
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| Authors: | Guo Feng Yang Peiran Qu Shiyue |
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| Affiliation: | Qingdao Institute of Architecture and Engineering |
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| Abstract: | A complete solution for point contact thermal EHL with slide/roll ratios larger than 2 has been performed to simulate the dimple phenomenon (local film thickening)reported by Kaneta et al in measuring the film thickness profile between a glass disk and a steel ball running in the opposite direction. Results obtained from glass-steel conjunctions under different operating conditions prove that the thermal effect is the most important factor responsible for the abnormality appearing in EHL. Numerical results reveal that a dimple occurs when the glass disk faster than the steel ball, and disappears when the former is slower, which has been observed in the experiment by Kaneta et al. It is showed that the pressure- viscosity coefficient has a strong effect on the occurrence of the dimple. Also, the effects of loads on the dimple are presented. |
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| Keywords: | Elastohydrodynamic lubrication Thermal effect Dimple |
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