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Research Article | Open Access

Transient tribo-dynamic analysis of crosshead slipper in low-speed marine diesel engines during engine startup

Rui LI1,2, Xianghui MENG1,2( ), Jingjin DONG3, Wenda LI3
State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China
School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
China Shipbuilding Power Engineering Institute Company Limited, Shanghai 201206, China
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Abstract

A crosshead slipper-guide system, which bears a significant thrust force, is an essential friction pair in low-speed marine diesel engines. Owing to the low moving speed of the crosshead slipper during engine startup, it is difficult to form good hydrodynamic lubrication between the crosshead slipper and guide. Therefore, a detailed analysis of the crosshead slipper during engine startup is needed. In this study, a new transient tribo-dynamic model for a crosshead slipper during the engine startup process is presented. The model consists of a mixed lubrication model of the crosshead slipper-guide and dynamic models of the piston assembly, crosshead assembly, connecting rod, and crankshaft. The tribo-dynamic performances of the crosshead slipper during startup and under the rated conditions were simulated and compared. The results show that the tribo-dynamics of the crosshead slipper during the startup process are significantly different from those under the rated conditions. Some measures beneficial for the low friction of a crosshead slipper-guide under the rated conditions may significantly increase the friction loss of the crosshead slipper-guide system during the startup process.

Keywords

low-speed marine diesel enginecrosshead slipperengine start-upmixed lubricationfriction losstribo-dynamic model

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Friction
Volume 9 Issue 6,
December 2021
Pages 1504-1527
DOI: 10.1007/s40544-020-0433-9

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Cite this article:
LI R, MENG X, DONG J, et al. Transient tribo-dynamic analysis of crosshead slipper in low-speed marine diesel engines during engine startup. Friction, 2021, 9(6): 1504-1527. https://doi.org/10.1007/s40544-020-0433-9

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Received: 25 March 2020
Revised: 13 June 2020
Accepted: 16 July 2020
Published: 09 November 2020
© The author(s) 2020

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