Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Elastohydrodynamic Film Thickness in Elliptical Contacts with Rolling and Spinning

구름/스핀 운동을 하는 경우의 타원접촉 EHL 유막두께

  • Park, Tae-Jo (School of Mechanical & Aerospace Engineering, ReCAPT, Gyeongsang National University)
  • 박태조 (경상대학교 기계항공공학부.항공기부품기술연구소)
  • Published : 2008.12.31
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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

References

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