TS-142
Mixed Lubrication of a Crosshead-Pin Bearing in a Large Marine Diesel Engine
Toshiro HAMATAKE*, Yutaro WAKURI** and Tatsumi KITAHARA***
ABSTRACT
The crosshead-pin bearing in a large marine diesel engine is always subjected to the non-reversing loads with limited angular oscillation. The bearing can not form a thick oil film adequate to be free from the bearing damage such as the metal seizure. Conventionally, several axial oil grooves are arranged on the loaded surface of the bearing. This arrangement leads to the remarkable reduction of load carrying capacity. The theoretical analysis on the mixed lubrication of the crosshead-pin bearing is made in the present study. The mean hydrodynamic pressure generated between two partially lubricated rough surfaces is determined via the average flow model developed by Patir and Cheng. The asperity contact pressure is estimated by using the model of Lee and Ren. The journal center locus and the distributions of the mean hydrodynamic pressure and the asperity contact pressure at the representative crank angles are obtained. Effects of surface roughness and the surface pattern parameter on the minimum film thickness and the maximum pressure are examined.
Key Words :
Mixed Lubrication, Elastohydrodynamic Lubrication, Load Carrying Capacity Crosshead-Pin Bearing, Large Marine Engine, Two-Stroke Cycle Engine
* Faculty of Engineering, Oita University
700 Dannoharu, Oita, 870-1192, JAPAN
FAX :+81-97-554-7764, E-mail:hamatak@cc. oita-u.ac.jp
* * Prof. Emeritus of Kyushu University
* * * Faculty of Engineering, Kyushu University
