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http://dx.doi.org/10.9725/kstle.2011.27.5.256

Effect of Roundness Error of a Crank Pin Bearing for a Marine Engine on the Minimum Film Thickness  

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)
Publication Information
Tribology and Lubricants / v.27, no.5, 2011 , pp. 256-263 More about this Journal
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
marine engine bearing; crank pin bearing; roundness error; minimum film thickness; reynolds equation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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