具粗糙度表面平行圓盤間液動擠壓薄膜性能之研究

A Study of Hydrodynamic Squeeze Film Characteristics between Parallel Circular Rough-Surface Disks

賴全(chuan lai)

指導教授 ： 許政行 ； 林昭仁

中原大學/工學院/機械工程研究所/博士(2009年)

https://doi.org/10.6840/cycu200901188

摘要

摘要
本文探討表面粗糙度和轉動慣性之複合效應於平行圓盤間擠壓薄膜潤滑特性。本研究採用克理斯汀森(Christensen)隨機粗糙度理論，並推測出雷諾式方程式應用於旋轉擠壓圓盤之表面性能之近似值。
表面粗糙度之效應對於平均擠壓薄膜特性而言是依隨著粗糙度結構之模式不同而異。本研究經由一封閉型求解獲得平均薄膜壓力，並將其應用於預估平均擠壓薄膜之相關特性。從分析結果顯示，軸承旋轉慣性效應之結果會導致較低平均荷重能力及較短之平均響應時間。整體而言，圓周粗糙之表面構造增加了平均荷重能力及較長之平均響應時間；然而徑向結構表面粗糙度對於擠壓荷重及響應時間則顯現相反之效應。

關鍵字

轉動慣性 ； 響應時間 ； 克理斯汀森(Christensen) 隨機理論模式 ； 平均薄膜壓力

並列摘要

ABSTRACT
The integrated effects of surface roughness and rotating inertia upon squeeze film characteristics between parallel circular disks are expatiated in the present research. According to the Christensen stochastic approach of rough surfaces, the stochastic Reynolds-type equation for rotating squeezing circular disks is therefore derived.
The effects of the surface roughness upon the mean squeeze film characteristics relate to the pattern of roughness structure. The closed-form solution obtained for the mean film pressure is applied to predict the mean squeeze film characteristics. As the outcome, the rotational inertia effects generate a lower mean load-carrying capacity and a shorter mean response time. In general, the surface structures with circumferential roughness increase the mean load-carrying capacity and lengthen the mean response time; On the contrary of the effects of surface roughness with radial structure has reverse effects upon the squeezing load and the response time.

並列關鍵字

rotating inertia ； response time ； Christensen stochastic approach ； mean film pressure

參考文獻

1. Christensen, H., “Elastohydrodynamic Theory of Spherical Bodies in Normal Approach,” ASME Journal of Lubrication Technology, Vol. 92, pp. 145-154 (1970).

2. Gould, P., “High-pressure Spherical Squeeze Films,” ASME Journal of Lubrication Technology, 93, pp. 207-208 (1971).

4. Pinkus, O. and Sternlicht, B., Theory of Hydrodynamic Lubrication, New York, McGraw-Hill. (1961).

5. Murti, P.R.K., “Squeeze Film Behaviour in a Spherical Porous Bearing,” ASME Journal of Lubrication Technology, Vol. 97, pp. 638-641 (1975).

6. Dowson, D., “Modes of Lubrication in Human Joints,” Proceedings of Society of Mechanical Engineers, Vol. 101, pp. 45-54 (1966).