Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Effect of Roundness Error of a Crank Pin Bearing for a Marine Engine on the Minimum Film Thickness

박용엔진 크랭크 핀 베어링의 형상오차가 최소유막두께에 미치는 영향

  • Ha, Yang-Hyup (Dept. of Mechanical and Precision Engineering, Pusan National University) ;
  • Shin, In-Dong (R&D Center, S&T Daewoo Co., Ltd.) ;
  • Lee, Sang-Min (Dept. of Nanofusion Technology, Pusan National University) ;
  • Lee, Seung-Jun (Interdisciplinary Program in Innovative Manufacturing Engineering, Pusan National University) ;
  • Lee, Deug-Woo (Dept. of Nano Mechatronics Engineering, Pusan National University)
  • 하양협 (부산대학교 정밀기계공학과) ;
  • 신인동 (S&T 대우(주) 기술연구소) ;
  • 이상민 (부산대학교 나노융합기술학과) ;
  • 이승준 (부산대학교 첨단정밀공학) ;
  • 이득우 (부산대학교 나노메카트로닉스공학과)
  • Received : 2011.02.23
  • Accepted : 2011.07.10
  • Published : 2011.10.31
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Abstract

Bearings of marine engines are operated under severe conditions because of dynamic load and low sliding speed. This paper deals with lubrication analysis of a crank pin bearing for a marine diesel engine. Journal center locus and oil film thickness are compared of crank pin bearing. In the past researches, journal bearings have been studied only about the surface of bearing. In addition to this conventional research, this paper analyzes the effect of roundness error of a journal and a bearing on the minimum film thickness. Numerical analysis has been studied by using Reynolds equation and also Half-Sommerfeld condition is applied as boundary condition. Futhermore, this study investigates the effect of roundness error change on the minimum film thickness. The results demonstrate that the bigger amplitude of roundness error yields, the lower minimum oil film thickness is. In comparison to previous research considered a journal and a bearing individually, the results considering a journal and a bearing together show that amplitude of roundness error of journal has very little effect on the minimum oil film thickness.

Keywords

References

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