Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Non-Steady Elastohydrodynamic Lubrication Analysis on the Cam-Roller of Valve Mechanism for a Marine Diesel Engine

박용디젤기관 밸브기구용 캠-롤러 사이의 비정상상태 탄성유체윤활해석

  • 구영필 (부산대학교 기계기술연구소) ;
  • 강민호 (부산대학교 대학원 정밀기계공학과) ;
  • 이득우 (부산대학교 기계공학부) ;
  • 조용주 (부산대학교 기계공학부)
  • Published : 2000.06.01
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Abstract

The numerical procedure to analyze a non-steady 3-dimensional elastohydrodynamic lubrication on the cyclically loaded contact has been newly developed. The procedure was applied on the cam-roller contact of the valve mechanism for the marine diesel engine. Both the pressure distribution and the film thickness between the cam and roller follower were calculated for each time step of the whole cycle. The pressure spike is shown at the outlet of the roller edge and it is getting higher as the external load is increased. The film thicknesses in the result of the non-steady analysis have a tendency to increase compared to those in the result of the analysis with the assumption of steady state. Therefore, the surface roughness of the non-steady contact need not be limited below that of the steady contact of the equivalent operating conditions.

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References

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