Study on Mixed Lubrication Characteristics of Helical Gears of Marine Diesel Engine under Real Machining Surface

doi:10.3901/JME.2025.01.290

Abstract

Abstract: As the core component of the timing transmission system of marine diesel engine, helical gears have been working under the harsh and changeable working conditions of high torque and high power density for a long time, and coupled with the lubrication effect of micro rough interface,which make it worked in the mixed lubrication environment of lubrication-contact coexistence,and it also resulting in frequent tooth surface wear and pitting failure. In this study, the transient mixed elastohydrodynamic lubrication characteristics of helical gear pair are studied considering the typical transient conditions of marine diesel engine timing helical gear and the influence of three-dimensional real machining surface roughness.The results show that the three-dimensional real machined surface will significantly increase the oil film pressure in the contact area of each meshing instantaneous helical gear and make the oil film thickness fluctuate strongly. The film thickness in the local contact area of the shaving surface is 0, and the contact probability of the asperities on the two tooth surfaces increases, which is unfavorable to the lubrication state. The polished surface can improve the interface lubrication state, reduce the contact area ratio of the two tooth surfaces, and increase the film thickness ratio, which is a better processing technology choice.In addition, high power and low speed conditions reduce the average film thickness and increase the contact area ratio, which is not conducive to the formation of interfacial lubricating film. In order to reduce the probability of pitting and wear failure on the tooth surface, try to keep the timing gear working in a high-speed stable state.

Key words: marine diesel engine, timing helical gear, three-dimensional real machining surface, mixed lubrication

CLC Number:

TH117

LI Renze, SHI Xiujiang, LU Xiqun, SUN Wen, LIU He. Study on Mixed Lubrication Characteristics of Helical Gears of Marine Diesel Engine under Real Machining Surface[J]. Journal of Mechanical Engineering, 2025, 61(1): 290-304.

References

[1] 沈成，姜宇，姜春雷，等. 考虑点蚀情况的双渐开线齿轮动态特性研究[J]. 机电工程，2024，41(3)：382-391. SHEN Cheng，JIANG Yu，JIANG Chunlei，et al. Dynamic characteristics of double involute gear system considering wear fault[J]. Journal of Mechanical&Electrical Engineering，2024，41(3)：382-391.
[2] 王晗，李会兰，刘国峰，等. 混合弹流润滑下直齿轮齿面磨损研究[J]. 机械传动，2022，46(12)：31-37. WANG Han，LI Huilan，LIU Guofeng，et al. Study on tooth wear of spur gears under the mixed elastohydrodynamic lubrication[J]. Journal of Mechanical Transmission，2022，46(12)：31-37.
[3] HAN L，ZHANG D，WANG F. Predicting film parameter and friction coefficient for helical gears considering surface roughness and load variation[J]. Tribology Transactions，2013，56(1)： 49-57.
[4] COLBOURNE J R. Geometry of involute gears： With 217 illustrations[M]. New York： Springer-Verlag，1987.
[5] JOHNSON K L，GREENWOOD J A，POON S Y. A simple theory of asperity contact in elastohydro-dynamic lubrication[J]. Wear，1972，19(1)：91–108.
[6] 雷玉英. 干摩擦与混合润滑下斜齿轮齿面粘着磨损计算[D]. 长沙：湖南大学，2018. LEI Yuying. Adhesive wear model for helical gears under dry friction and mixed lubrication[D]. Changsha： Hunan University，2018.
[7] 张玉浩. 考虑粗糙度下的人字齿轮热弹流润滑特性分析[D]. 济南：济南大学，2022. ZHANG Yuhao. Analysis of thermal elastohydrodynamic lubrication characteristics of Herringbone gear considering roughness[D]. Jinan： Jinan university，2022.
[8] 张沁薇. 斜齿轮修形微弹流润滑性能研究[D]. 南京：南京航空航天大学，2018. ZHANG Qinwei. Micro-elastohydrodynamic lubrication properties for modified helical gear[D]. Nanjing： Nanjing University of Aeronautics and Astronautics，2018.
[9] 高攀.直齿圆柱齿轮疲劳点蚀失效机理及实验研究[D]. 大连：大连理工大学，2015. GAO Pan. Failure mechanism and experimental investigation of fatigue pitting for spur gear[D]. Dalian： Dalian University of Technology，2015.
[10] 杨勇，王家序，周青华，等. 表面粗糙度特征对齿轮接触区润滑特性的影响[J]. 摩擦学学报，2017，37(2)：248-256. YANG Yong，WANG Jiaxu ，ZHOU Qinghua，et al. Influence of surface roughnesson the mixed elastohydrodynamic lubrication performance of gear contact area[J]. Tribology，2017，37(2)：248-256.
[11] LI Y，SHI L，LIU Z，et al. Study on the lubrication state and pitting damage of spur gear using a 3D mixed EHL model with fractal surface roughness[J]. Journal of Mechanical Science and Technology, 2022, 36(12)：5947-5957.
[12] YI S，HE T，GONG X. Numerical investigations on the lubrication characteristics of involute harmonic gears[J]. Industrial Lubrication and Tribology，2023，75(10)： 1149–1160.
[13] 栾晓翔. 基于有限元法的直齿轮混合润滑研究[D]. 重庆：重庆大学，2022. LUAN Xiaoxiang，Research on mixed lubrication of spur gears based on the finite element method[D]. Chongqing： Chongqing University，2022.
[14] JING W，Zhang A，Gao P. A study of spur gear pitting under EHL conditions：Theoretical analysis and experiments. Tribology International，2016，94： 146-154.
[15] 李文广，王家序，王骁鹏，等. 基于真实粗糙表面斜齿轮瞬态混合弹流润滑研究[J]. 四川大学学报，2016，48(S2)：173-179. LI Wenguang，WANG Jiaxu，WANG Xiaopeng，et al. Research of transient mixed elastohydrodynamie lubrication model of helical gear with consideration of real roughness surface[J]. Journal of Sichuan University ，2016，48(S2)： 173-179.
[16] CHIMANPURE A S，KAHRAMAN A，TALBOT D. A transient mixed elastohydrodynamic lubrication model for helical gear contacts[J]. Journal of Tribology，2021，143(6)：061601.
[17] SHI X，LU X，HE T，et al. Predictions of friction and flash temperature in marine gears based on a 3D line contact mixed lubrication model considering measured surface roughness[J]. Journal of Central South University，2021，28(5)：1570-1583.
[18] 刘冬伟. 渐开线斜齿圆柱齿轮时变热弹流润滑研究[D]. 青岛：青岛理工大学，2008. LIU Dongwei. Studies on the elastohydrodynamic lubrication of involute helical gears[D]. Qingdao： Qingdao University of Technology，2008.
[19] YANG P，WEN S. A generalized Reynolds equation for non-Newtonian thermal elastohydrodynamic lubrication[J]. Journal of Tribology，1990，112(4)： 631-636.
[20] ROELANDS C J A. Correlation aspects of viscosity- temperature-pressure relationship of lubricating oils[D]. Netherlands：Delft University of Technology，1966.
[21] DOWSON D，HIGGINSON G R. Elasto-hydrodynamic lubrication：international series on materials science and technology[M]. Oxford： University of Oxford，1977.
[22] 刘明勇，刘亚东，吴晨辉，等. 有限长线接触斜齿轮副瞬态弹流润滑研究[J]. 润滑与密封，2018，43(5)：30-36，98. LIU Mingyong ，LIU Yadong，WU Chenhui，et al. Research on transient EHL of helical gears using finite line contact model[J]. Lubrication Engineering，2018，43(5)：30-36，98.
[23] REN N，ZHU D，CHEN W W，et al. A Three-dimensional deterministic model for rough surface line-contact ehl problems[J]. Journal of Tribology，2008，131(1)：011501.
[24] 张肖肖. 凸轮-挺柱副摩擦与润滑特性试验研究[D]. 青岛：青岛理工大学，2022. ZHANG Xiaoxiao. Experimental study on friction and lubrication characteristics of cam-tappet pairs[D]. Qingdao：Qingdao University of Technology，2022.
[25] HU Y，ZHU D. A full numerical solution to the mixed lubrication in point contacts[J]. Journal of Tribology，2000，122(1)：1-9.
[26] 华德良，史修江，孙文，等. 船用柴油机供油凸轮-滚轮副弹流润滑分析[J]. 哈尔滨工程大学学报，2023，44(6)：986-994. HUA Deliang，SHI Xiujiang，SUN Wen，et al. Elastohydrodynamic lubrication analysis of fuel supplycam-roller pair of marine diesel engine[J]. Journal of Harbin Engineering University，2023，44(6)： 986-994.