Browse > Article
http://dx.doi.org/10.9725/kstle.2008.24.6.355

Elastohydrodynamic Film Thickness in Elliptical Contacts with Rolling and Spinning  

Park, Tae-Jo (School of Mechanical & Aerospace Engineering, ReCAPT, Gyeongsang National University)
Publication Information
Tribology and Lubricants / v.24, no.6, 2008 , pp. 355-361 More about this Journal
Abstract
In highly stressed machine elements such as angular contact ball bearings and toroidal type traction drives, the elastohydrodynamic lubrication of elliptical contacts with both rolling and spinning motion are occur. In this paper, a finite difference method with non-uniform grid systems and the Newton-Raphson method are applied to solve the problems. Pressure distributions, film contours and variations of the minimum and central film thicknesses are compared with various ellipticity parameter, dimensionless speed and load parameter. The results showed that the spinning motion has significant influence especially on the film shapes. Reduction of the minimum film thickness under spinning is remarkable whereas the central film thickness is relatively less. Especially variations of the minimum film thicknesses with rolling velocity, load and ellipticity ratio are a great different from those of pure rolling. Therefore present numerical scheme can be used in the analysis of general elliptical contact EHL problems and further studies are required.
Keywords
elliptical contacts; EHL; rolling/spinning; numerical analysis; newton-raphson method; minimum film thickness;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Dowson, D. and Higginson, G. R., Elastohydrodynamic Lubrication, SI ed., Pergamon Press, 1977
2 Hamrock, B. J. and Dowson, D., 'Isothermal Elastohydro-dynamic Lubrication of Point Contacts, Part 3 : Fully Flooded Results', Trans. ASME, J. of Lub. Tech., Vol. 99, pp. 264-276, 1977   DOI
3 Chittenden, R. J., Dowson, D. and Taylor, C. M., 'Elastohydrodynamic Film Thickness in Concentrated Contacts', Proc. Instn. Mech. Engrs., J. of Mech. Eng. Sci., Vol. 200, pp. 207-226, 1986   DOI
4 Skurka, J. C., 'Elastohydrodynamic Lubrication of Roller Bearings', Trans. ASME, J. of Lub. Tech., Vol. 92, pp. 281-291, 1970   DOI
5 Zou, Q., Huang, C. and Wen, S., 'Elastohydrodynamic Film Thickness in Elliptical Contacts with Spinning and Rolling', Trans. ASME, J. of Tribology, Vol. 121, pp. 686-692, 1999   DOI
6 박태조, 현준수, '타원접촉의 탄성유체윤활: 제1보 - 윤활유의 유입방향이 Hertz 접촉타원의 장축방향인 경우', 한국윤활학회지, Vol. 14, No. 4, pp. 58-63, 1998
7 Park, T. J. and Kim, K. K., 'A Numerical Analysis of the Elastohydrodynamic Lubrication of Elliptical Contacts', Wear, Vol. 136, pp. 299-312, 1990   DOI   ScienceOn
8 Mostofi, A. and Gohar, R., 'Oil Film Thickness and Pressure Distribution in Elastohydrodynamic Point Contacts', J. of Mech. Eng. Sci., Vol. 24, pp. 173-182, 1982   DOI
9 박태조, 고재현, '스핀운동이 타원접촉의 탄성유체윤활에 미치는 영향', 한국정밀공학회 2007년도 춘계학술대회논문집, 2007
10 Dowson, D., Taylor, C. M. and Xu, H., 'Elastohydrodynamic Lubrication of Elliptical Contacts with Spin and Rolling', Proc. Instn. Mech. Engrs., J. of Mech. Eng. Sci., Vol. 205, pp. 165-174, 1991   DOI
11 박태조, '타원접촉의 탄성유체윤활: 제2보 - 스핀운동의 영향', 한국윤활학회지, Vol. 23, No. 2, pp. 49-55, 2007   과학기술학회마을
12 Taniguchi, M., Dowson, D. and Taylor, C. M., 'The Effect of Spin Motion upon Elastohydrodynamic Elliptical Contacts', Elastohydrodynamics, Vol. 32, pp. 599-610, 1997
13 Ehret, P., Chevalier, F., Dowson, D., Taylor, C. M., Okamura, H. and Sano, T., 'Traction in EHL Elliptical Contacts with Spin Conditions', Tribology Series, Vol. 38, pp. 71-83, 2000
14 박태조, 'Hamrock & Dowson의 EHL 유막두께식에 대한 평가', 한국윤활학회지, Vol. 12, No. 3, pp. 115-122, 1996
15 장시열, '무단 변속기의 동력전달 접촉에서 회전운동을 고려한 타원형상의 점접촉 탄성유체윤활연구', 한국윤활학회지, Vol. 21, No. 6, pp. 272-277, 2006