비정상 상태의 선접촉 탄성유체윤활 유막두께 및 유막압력 특성연구
Study on the Film Thickness and Pressure of the Transient Line Contact Elastohydrodynamic Lubrication
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Elastohydrodynamic lubrication (EHL) analysis shows that film thickness is very flat in the contact area and pressure distribution is somehow similar to that of Hertzian contact pressure except the outlet region with pressure spike. These typical patterns of EHL film thickness and pressure are the cases under the steady contact conditions of applied loads and speeds. However, many engineering contacts are rather under the conditions of varying loads and contact speeds, and therefore the predictions for endurance life and performance of machine elements with steady EHL analysis are not suitable in many occasions. This study shows the differences in film thickness formation and pressure distribution between steady and transient contact conditions in several contact cases.
Abstract
Elastohydrodynamic lubrication (EHL) analysis shows that film thickness is very flat in the contact area and pressure distribution is somehow similar to that of Hertzian contact pressure except the outlet region with pressure spike. These typical patterns of EHL film thickness and pressure are the cases under the steady contact conditions of applied loads and speeds. However, many engineering contacts are rather under the conditions of varying loads and contact speeds, and therefore the predictions for endurance life and performance of machine elements with steady EHL analysis are not suitable in many occasions. This study shows the differences in film thickness formation and pressure distribution between steady and transient contact conditions in several contact cases.
참고문헌 (7)
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- Dowson, D, "A Transient Elastohydrodynamic Lubrication Analysis of a Cam and Follower", Journal of Physics: Applied Physics, 25, pp.A313~A320 (1992)
- Venner, C. H, "Advanced Multilevel Solution of the EHL Line Contact Problem", Journal of Tribology, pp.426~432 (1990)
- Lubrecht, A. A, "The Numerical Solution of Lubricated Line and Point Contact Problem Using multigrid Techniques", 박사, pp.1987
- Ehret, P, "Analysis of Isothermal Elastohydrodynamic Point Contact Lubricated by Newtonian Fluids using Multigrid Methods", Journal of Engineering Tribology, 211, pp.493~508