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

Rui LI; Xianghui MENG; Jingjin DONG; Wenda LI

doi:10.1007/s40544-020-0433-9

Friction 2021, 9(6): 1504-1527 https://doi.org/10.1007/s40544-020-0433-9

Research Article |

Open Access | Issue | Published: 09 November 2020

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

Show Author's Information Hide Author's Information Rui LI^{¹^,²}, Xianghui MENG^{¹^,²}(

), Jingjin DONG^³, Wenda LI^³

1State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China

2School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China

3China Shipbuilding Power Engineering Institute Company Limited, Shanghai 201206, China

Keywords:

mixed lubrication, low-speed marine diesel engine, crosshead slipper, engine start-up, friction loss, tribo-dynamic model

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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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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.

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

Show Author's information Hide Author's Information Rui LI^{¹^,²}, Xianghui MENG^{¹^,²}(

), Jingjin DONG^³, Wenda LI^³

1State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China

2School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China

3China Shipbuilding Power Engineering Institute Company Limited, Shanghai 201206, China

Abstract

Keywords: mixed lubrication, low-speed marine diesel engine, crosshead slipper, engine start-up, friction loss, tribo-dynamic model

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Acknowledgements

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Publication history

Received: 25 March 2020

Revised: 13 June 2020

Accepted: 16 July 2020

Published: 09 November 2020

Issue date: December 2021

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Acknowledgements

This study was supported by the Research Project of High Technological Vessels: Development of Low Speed Marine Engines (Grant No. MC-201501-D01-03), and the National Natural Science Foundation of China (Grant No. 51875344). Professor Youbai Xie, the leader of our group, contributed significantly to this research, but preferred not to be named as an author because he had no time available to check the details of the manuscript. The authors would like to express their sincere appreciation to Professor Xie for his help.

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