Elastohydrodynamic lubrication analysis of fuel supply cam-roller pair of marine diesel engine

被引：0
|
作者：
Hua D. [1 ]
Shi X. [1 ]
Sun W. [1 ]
Li R. [1 ]
Lu X. [1 ]
机构：
[1] College of Power and Energy Engineering, Harbin Engineering University, Harbin
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2023年 / 44卷 / 06期
关键词：
cam-roller pair; dynamic contact; elastohydrodynamic lubrication; friction coefficient; fuel supply mechanism; marine diesel engine; surface flash temperature;
D O I：
10.11990/jheu.202111001
中图分类号：
学科分类号：
摘要：
The cam-roller is the core friction pair of the fuel supply mechanism of a diesel engine, which operates under a harsh environment of periodic transient load, speed, and curvature. The service life of cam rollers is reduced due to the complex interface elastohydrodynamic lubrication characteristics and frequent surface pitting and wear. In this paper, an elastohydrodynamic lubrication analysis model considering the transient dynamics of the cam-roller pair is established by taking the fuel supply mechanism of a marine diesel engine as a research object to verify the accuracy of the elastohydrodynamic lubrication results of the cam pair based on the single-mass dynamics model. Moreover, the effect of working conditions on the dynamic contact and the elastohydrodynamic lubrication performance of the cam-roller pair is also investigated. The results show that in one working cycle, the maximum contact stress appears at the end angle of the fuel supply; additionally, it has the worst lubrication state and the highest surface friction flash temperature at the end of the return section. The effects of changing the cam speed and contact load on the friction and lubrication states are discussed. Furthermore, the film thickness decreases under low speed and heavy load, resulting in a high friction coefficient and surface flash temperature. Moreover, the friction and lubrication state of the cam-roller pair can be significantly improved by optimizing the structural parameters, such as eccentricity and base circle radius. © 2023 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：986 / 994
页数：8
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