Mixed Thermal Elastohydrodynamic Lubrication Analysis for the Coupled Cam-roller-pin Contact in Heavy-duty Marine Engines

doi:10.3901/JME.2024.19.116

Abstract

Abstract: The cam-roller-pin pair is the key component of fuel injectors in high-power marine engines, which supports the extremely high fuel pressure from the injector, leading to possible roller slip and severe surface wear.To analyze the performance of this friction pair, a mixed thermo-elastohydrodynamic lubrication model considering the coupling effects of the cam-roller-pin under heavy-duty operating conditions of marine engines is developed.The results show that the high fuel pressure from the injector significantly reduces oil film thickness and increases asperity contact and the coupling effects among the cam-roller-pin could cause roller slip.The friction loss in the cam-roller follower unit is primarily attributed to the roller-pin contact, and the temperature rise in this contact is also more significant.The influences of pin profile modification on friction reduction and wear reduction are also investigated, and the modified profile design resulted in a reduction of approximately 7.2% in friction loss and 12.8% in wear load.Additionally, the comparison between experimental and simulation results shows that the model is valid and the predicted results are reasonable.

Key words: marine engine, cam-roller-pin pair, heavy load, mixed TEHL

CLC Number:

TH117

LÜ Bugao, MENG Xianghui, TANG Yihu, CHEN Kang, YIN Jiabao, XIE Youbai. Mixed Thermal Elastohydrodynamic Lubrication Analysis for the Coupled Cam-roller-pin Contact in Heavy-duty Marine Engines[J]. Journal of Mechanical Engineering, 2024, 60(19): 116-131.

References

[1] DOWSON D，TAYLOR C，ZHU G. A transient elastohydrodynamic lubrication analysis of a cam and follower[J]. Journal of Physics D：Applied Physics，1992，25(1A)：A313.
[2] WANG J，YANG P. A numerical analysis for TEHL of eccentric-tappet pair subjected to transient load[J]. Journal Tribology，2003，125(4)：770-779.
[3] LEE J，PATTERSON D J. Analysis of cam/roller follower friction and slippage in valve train systems [R]. SAE Technical Paper，1995.
[4] 石岩，李云峰，刘佳，等. 高压油泵凸轮轴激光增材制造梯度耐磨层研究[J]. 机械工程学报，2017，53(6)：80-87. SHI Yan，LI Yunfeng，LIU Jia，et al. Research on gradient wear-resistant layer in laser additive manufacturing of high-pressure oil pump camshaft[J]. Journal of Mechanical Engineering，2017，53(6)：80-87.
[5] LÜ B，MENG X，ZHANG R，et al. A comprehensive numerical study on friction reduction and wear resistance by surface coating on cam/tappet pairs under different conditions[J]. Coatings，2020，10(5)：485.
[6] SHIRZADEGAN M，ALMQVIST A，LARSSON R. Fully coupled EHL model for simulation of finite length line cam-roller follower contacts[J]. Tribology International，2016，103：584-98.
[7] ALAKHRAMSING S S，DE ROOIJ M，SCHIPPER D J，et al. Lubrication and frictional analysis of cam–roller follower mechanisms[J]. Proceedings of the Institution of Mechanical Engineers，Part J：Journal of Engineering Tribology，2018，232(3)：347-363.
[8] SHUYI L，FENG G，NANNAN S，et al. Elastohydrodynamic lubrication analysis of cam-roller pairs of internal combustion engines[J]. International Journal of Engine Research，2022：14680874221085638.
[9] 朱建荣，李书义，郭晓龙，等. 内燃机凸轮-滚轮型接触副弹流润滑分析[J]. 润滑与密封，2020，45(11)：83-90. ZHU Jianrong，LI Shuyi，GUO Xiaolong，et al. Elastohydrodynamic lubrication analysis of cam roller contact pairs in internal combustion engines[J]. Lubrication and Sealing，2020，45(11)：83-90.
[10] CHIU Y. Lubrication and slippage in roller finger follower systems in engine valve trains[J]. Tribology transactions，1992，35(2)：261-268.
[11] JI F，TAYLOR C. A tribological study of roller follower valve trains. Part 1：A theoretical study with a numerical lubrication model considering possible sliding [M]. Tribology series. Elsevier. 1998：489-499.
[12] TURTURRO A，RAHMANI R，RAHNEJAT H，et al. Assessment of friction for cam-roller follower valve train system subjected to mixed non-Newtonian regime of lubrication [C]//Proceedings of the Internal Combustion Engine Division Spring Technical Conference. Torino，Piemonte，Italy：American Society of Mechanical Engineers，2012，44663：917-923.
[13] ALAKHRAMSING S S，DE ROOIJ M B，SCHIPPER D J，et al. A full numerical solution to the coupled cam–roller and roller–pin contact[J]. Proceedings of the Institution of Mechanical Engineers，Part J：Journal of Engineering Tribology，2018，232(10)：1273-1284.
[14] ALAKHRAMSING S S，DE ROOIJ M B，VAN DROGEN M，et al. The influence of stick–slip transitions in mixed-friction predictions of heavily loaded cam–roller contacts[J]. Proceedings of the Institution of Mechanical Engineers，Part J：Journal of Engineering Tribology，2019，233(5)：676-691.
[15] KHURRAM M，MUFTI R A，ZAHID R，et al. Experimental measurement of roller slip in end-pivoted roller follower valve train[J]. Proceedings of the Institution of Mechanical Engineers，Part J：Journal of Engineering Tribology，2015，229(9)：1047-1055.
[16] 高帅，韩勤锴，褚福磊. 考虑热流固耦合的角接触滚动轴承动力学特性及打滑状态分析[J]. 机械工程学报，2022，58(9)：87-97. GAO Shuai，HAN Qinkai，CHU Fulei. Dynamic characteristics and slip state analysis of angular contact rolling bearings considering thermal fluid structure coupling[J]. Journal of Mechanical Engineering，2022，58(9)：87-97.
[17] MATTHEWS J A，SADEGHI F. Kinematics and lubrication of camshaft roller follower mechanisms[J]. Tribology Transactions，1996，39(2)：425-433.
[18] PATIR N，CHENG H. An average flow model for determining effects of three-dimensional roughness on partial hydrodynamic lubrication[J]. Journal of Lubrication Technology，1978，100(1)：12-17.
[19] 梅雪松，谢友柏. 高速内燃机凸轮与挺柱付润滑过程的数值分析[J]. 内燃机学报，1994，12(1)：71-77. MEI Xuesong，XIE Youbai. Numerical analysis of lubrication process for high-speed internal combustion engine cam and tappet pairs[J]. Journal of Internal Combustion Engines，1994，12(1)：71-77.
[20] PATIR N，CHENG H. Application of average flow model to lubrication between rough sliding surfaces[J]. Journal of lubrication Technology，1979，100(1)：12-17.
[21] YANG P，WANG J，KANETA M. Thermal and non-Newtonian numerical analyses for starved EHL line contacts[J]. Journal of Tribology，2005，128(2)：282-290.
[22] AUSAS R，RAGOT P，LEIVA J，et al. The impact of the cavitation model in the analysis of microtextured lubricated journal bearings[J]. Journal of Tribology，2007，129(4)：868-875.
[23] LIU R，JING L，MENG X，et al. Mixed elastohydrodynamic analysis of a coupled journal-thrust bearing system in a rotary compressor under high ambient pressure[J]. Tribology International，2021，159：106943.
[24] ROELANDS C J A，WINER W O，WRIGHT W A. Correlational aspects of the viscosity-temperature- ressure relationship of lubricating oils[J]. Journal of Lubrication Technology，1971，93(1)：209-10.
[25] DOWSON D，HIGGINSON G R. Elasto-hydrodynamic lubrication：International series on materials science and technology [M]. New York：Elsevier，2014.
[26] GREENWOOD J，TRIPP J. The contact of two nominally flat rough surfaces[J]. Proceedings of the Institution of Mechanical Engineers，1970，185(1)：625-33.
[27] LIU Z，MENG X，WEN C，et al. On the oil-gas-solid mixed bearing between compression ring and cylinder liner under starved lubrication and high boundary pressures[J]. Tribology International，2019，140：105869.
[28] 彭城，曹宏瑞，朱玉彬，等. 三点接触球轴承打滑动力学分析与验证[J]. 机械工程学报，2023，59(1)：123-130. PENG Cheng，CAO Hongrui，ZHU Yubin，et al. Analysis and verification of sliding dynamics of three point contact ball bearings[J]. Journal of Mechanical Engineering，2023，59(1)：123-130.
[29] ARCHARD J F，HIRST W. The wear of metals under unlubricated conditions[J]. Proceedings of the Royal Society of London Series A Mathematical and Physical Sciences，1956，236(1206)：397-410.
[30] 陈勇，李金锴，臧立彬，等. 疲劳点蚀斜齿轮动力学仿真预测与故障识别试验研究[J]. 机械工程学报，2021，57(9)：61-70. CHEN Yong，LI Jinkai，ZANG Libin，et al. Dynamic simulation prediction and fault identification experimental research on fatigue pitting helical gears[J]. Journal of Mechanical Engineering，2021，57(9)：61-70.
[31] 常秋英，高凯，杨沛然. 凸轮-挺柱热弹流润滑的挤压效应分析[J]. 北京理工大学学报，2016，36(11)：1127-1130. CHANG Qiuying，GAO Kai，YANG Peiran. Analysis of the squeeze effect of cam tappet thermal elastohydrodynamic lubrication[J]. Journal of Beijing Institute of Technology，2016，36(11)：1127-1130.
[32] 解忠良，焦见，杨康. 水润滑夹心轴承流-固耦合动力学特性研究[J]. 机械工程学报，2023，59(3)：86-97. XIE Zhongliang，JIAO Jian，YANG Kang. Research on the fluid structure coupling dynamic characteristics of water lubricated sandwich bearings[J]. Journal of Mechanical Engineering，2023，59(3)：86-97.
[33] 章永年，陶亚满，蒋书运，等. 含角接触球轴承和粗糙间隙表面滑动轴承关节的平面柔性多连杆机构动态误差分析与优化设计[J]. 机械工程学报，2022，58(1)：69-87. ZHANG Yongnian，TAO Yaman，JIANG Shuyun，et al. Dynamic error analysis and optimization design of planar flexible multi link mechanisms with angular contact ball bearings and rough clearance surface sliding bearing joints[J]. Journal of Mechanical Engineering，2022，58(1)：69-87.