Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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An Elastohydrodynamic Lubrication of Elliptical Contacts : Part II - The Effect of Spin Motion

타원접촉의 탄성유체윤활 : 제2보 - 스핀운동의 영향

  • Park, Tae-Jo (School of Mechanical and Aerospace Engineering, Gyeongsang National University)
  • 박태조 (경상대학교 기계항공공학부, 공학연구원)
  • Published : 2007.04.30
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Abstract

A numerical analysis of elastohydrodynamic lubrication of elliptical contacts with both rolling and spinning has been carried out. A finite difference method with non-uniform grid systems and the Newton-Raphson method are applied to solve the problems. The velocity vectors resulting from combined spinning and rolling/sliding motion lead to asymmetric pressure distributions and film shapes. Pressure distributions, film contours and variations of the minimum and central film thicknesses are compared with various spin-roll ratios. Reduction of the minimum film thickness under spinning is remarkable whereas the central film thickness is relatively less. The spin motion have large effect on variations of the minimum film thickness with load parameter which are small in pure rolling/sliding cases. Therefore present numerical scheme can be used in the analysis of general elliptical contact EHL problems and further studies are required.

Keywords

References

  1. Aramaki, H. et al., 'The Performance of Ball Bearings with Silicon Nitride Ceramic Balls in High Speed Spindle for Machine Tools,' Trans. ASME, J. of Tribology, Vol. 10, pp.693-698, 1988
  2. Dowson, D. and Higginson, G. R., Elastohydrodynamic Lubrication, SI ed., Pergamon Press, 1977
  3. Hamrock, B. J. and Dowson, D., 'Isothermal Elastohydrodynamic Lubrication of Point Contacts, Part 1 : Theoretical Formulation,' Trans. ASME, J. of Lub. Tech., Vol.98, pp.223-229, 1976 https://doi.org/10.1115/1.3452801
  4. Hamrock, B. J. and Dowson, D., 'Isothermal Elastohydrodynamic Lubrication of Point Contacts, Part 2: Ellipticity Parameter Results,' Trans. ASME, J. of Lub. Tech., Vol.98, pp.375-383, 1976 https://doi.org/10.1115/1.3452861
  5. Hamrock, B. J. and Dowson, D., 'Isothermal Elastohydrodynamic Lubrication of Point Contacts Part 3: Fully Flooded Results,' Trans. ASME, J. of Lub. Tech., Vol.99, pp.264-276, 1977 https://doi.org/10.1115/1.3453074
  6. Chittenden, R. J., Dowson, D. and Taylor, C. M., 'Elastohydrodynamic Film Thickness in Concentrated Contacts,' Proc. Instn. Mech. Engrs., Vol.200, pp.207-226, 1986 https://doi.org/10.1243/PIME_PROC_1986_200_116_02
  7. 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 https://doi.org/10.1243/JMES_JOUR_1982_024_034_02
  8. Dowson, D., Taylor, C. M. and Xu, H., 'Elastohydrodynamic Lubrication of Elliptical Contacts with Pure Spin,' Proc. Instn. Mech. Engrs., J. of Mech. Eng. Sci., Vol.207, pp.83-92, 1993 https://doi.org/10.1243/PIME_PROC_1993_207_104_02
  9. 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 https://doi.org/10.1243/PIME_PROC_1991_205_107_02
  10. 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 https://doi.org/10.1115/1.2834124
  11. Taniguchi, M., Dowson, D. and Taylor, C. M., 'The Effect of Spin Motion upon Elastohydrodynamic Elliptical Contacts,' Elastohydrodynamics, Vol.32, pp.599-610, 1997
  12. 장시열, '무단 변속기의 동력전달 접촉에서 회전운동을 고려한 타원형상의 점접촉 탄성유체윤활연구,' 한국윤활학회지, Vol.21, No.6, pp.272-277, 2006
  13. Park, T. J. and Kim, K. K., 'A Numerical Analysis of the Elastohydrodynamic Lubrication of Elliptical Contacts,' Wear, Vol.136, pp.299-312, 1990 https://doi.org/10.1016/0043-1648(90)90153-2
  14. 박태조, 'Hamrock & Dowson의 EHL 유막두께식에 대한 평가', 한국윤활학회지, Vol. 12, No.3, pp.115-122, 1996
  15. 박태조, 현준수, '타원접촉의 탄성유체윤활 : 제1보- 윤활유의 유입방향이 Hertz 접촉타원의 장축방향인 경우,' 한국윤활학회지, Vol.14, No.4, pp.58-63, 1998

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