Lundberg형 프로파일의 원통형 로울러의 탄성유체윤활 해석
Elastohydrodynamic Lubrication Analysis of a Lundberg Profile-type Cylindrical Roller
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The rollers and/or races in cylindrical and tapered roller bearings should be profiled to relieve highedge stress concentrations caused by their finite lengths and misalignment. In this study, a numerical analysis wasperformed to investigate the elastohydrodynamic (EHL) lubrication of a Lundberg profile-type cylindrical roller. A finite difference method with fully nonuniform grids and the Newton-Raphson method eere used to presentdetailed EHL pressure distributions and film shapes, as well as the variations in the minimum and central filmthicknesses with the profile modification coefficient. In the Lundberg profile, the maximum pressure and minimumfilm thickness always occurred near the edges. Proper modification of the Lundberg profile considerablyincreased the minimum film thickness.
Abstract
The rollers and/or races in cylindrical and tapered roller bearings should be profiled to relieve highedge stress concentrations caused by their finite lengths and misalignment. In this study, a numerical analysis wasperformed to investigate the elastohydrodynamic (EHL) lubrication of a Lundberg profile-type cylindrical roller. A finite difference method with fully nonuniform grids and the Newton-Raphson method eere used to presentdetailed EHL pressure distributions and film shapes, as well as the variations in the minimum and central filmthicknesses with the profile modification coefficient. In the Lundberg profile, the maximum pressure and minimumfilm thickness always occurred near the edges. Proper modification of the Lundberg profile considerablyincreased the minimum film thickness.
참고문헌 (19)
- Lundberg, G., "Elastische Berührung zweier Halbräume", Forschung auf dem Gebiete des Ingenieurwesens, 10(5), pp.201~221 (1939)
- Johns, P. M., "Roller Bearings under Radial and Eccentric Loads", Tribology International, 14, pp.131~136 (1981)
- Fujiwara, H., "Logarithmic Profile of Rollers in Roller Bearing and Optimization of the Profile", Trans. of JSME (Part C), 72, pp.3022~3029 (2006)
- Skurka, J. C., "Elastohydrodynamic Lubrication of Roller Bearings", J. of Lub. Tech., 92, pp.281~291 (1970)
- Dowson, D., "A Numerical Solution to the Elastohydrodynamic Problem", J. of Mech. Eng. Sci., 1, pp.7~15 (1959)
- Wymer, D. G., "Elastohydrodynamic Lubrication of a Line Contact", Proc. IMechE, 188, pp.221~231 (1973)
- Mostofi, A., "Elastohydrodynamic Lubrication of Finite Line Contacts", J. of Lub. Tech., 105, pp.598~604 (1983)
- Park, T. J., "Elastohydrodynamic Lubrication of a Finite Line Contacts", Wear, 223(1-2), pp.102~109 (1998)
- Kushwaha, M., "Aligned and Misaligned Contacts of Rollers to Races in Elastohydrodynamic Finite Line Conjunctions", Proc. IMechE, J. of Mech. Eng. Sci., 216, pp.1051~1069 (2002)
- Park, T. J., "Effect of Roller Profile and Misalignment in EHL of Finite Line Contacts", Proc. of ESDA2010, ESDA2010-24367 (2010)
- 박태조, "Misalignment가 있는 유한한 선접촉 EHL 문제의 수치해석", 한국윤활학회지, 26(5), pp.263~271 (2010), 한국윤활학회
- Yamashita, R., "An Analysis of Elastohydrodynamic Film Thickness in Tapered Roller Bearings", Tribology Series, 32, pp.617~637 (1997)
- 박태조, "시일과 스틸면 사이에 구형 입자가 있는 미끄럼 접촉 해석", 한국윤활학회지, 28(1), pp.1~6 (2012), 한국윤활학회
- Park, T. J., "A Finite Line Contacts EHL Analysis in a Tapered Roller Bearing", Proc. of 18th ICT 2012 (2012)
- Liu, X., "Analysis of the Thermal Elastohydrodynamic Lubrication of a Finite Line Contact", Tribology International, 35, pp.137~144 (2002)
- Chen, X., "Elastohydrodynamic Lubrication of Logarithmic Profile Roller Contacts", Chinese J. of Mechanical Engineering, 14, pp.347~352 (2001)
- Sun, H., "Thermal EHL Analysis of Cylindrical Roller under Heavy Load", Proc. of IUTAM Sympo. on Elastohydrodynamics and Micro-elastohydrodynamics, pp.107~120 (2006)
- Park, T. J., "Elastohydrodynamic Lubrication Analysis of Cylindrical Roller with Lundberg Profile", Proc. of 3rd ITS, ITS2013-0034 (2013)
- Roelands, J. A., "Correlation Aspects of Viscosity- Temperature-Pressure Relationship of Lubricating Oils", 박사, pp.1966