Mixed-Lubrication Analysis of Journal Bearing Considering Local Wear and Cavitation Effect

被引：0
|
作者：
Song X. [1 ]
Sun S. [1 ]
Wu W. [1 ]
机构：
[1] School of Mechanical Engineering, Beijing Institute of Technology, Beijing
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2020年 / 48卷 / 08期
基金：
中国国家自然科学基金;
关键词：
JFO boundary condition; Journal bearings; Mixed-lubrication; Wear;
D O I：
10.12141/j.issn.1000-565X.190863
中图分类号：
学科分类号：
摘要：
A mixed hydrodynamic lubrication model of bearing with local wear was established based on the ave-raged Reynolds equation and JFO cavitation boundary condition, in order to analyze the effects of local wear and cavitation effect on the mixed lubrication performance of journal bearing. The effect of different maximum wear depths on oil film thickness distribution, average hydrodynamic pressure distribution, position of axial center and Stribeck curves of the bearing were investigated by numerical solution. The results show that local wear significantly changes oil film thickness distribution and average hydrodynamic pressure distribution. The large wear depths lead to the change of the position of axial center, which deviates from the original design. The small wear depths reduce the friction coefficient of the bearing in mixed-lubrication regime, and can transfer from mixed-lubrication to hydrodynamic lubrication at a lower speed. The friction coefficient increases with the increase of the wear depth. © 2020, Editorial Department, Journal of South China University of Technology. All right reserved.
引用
收藏
页码：102 / 107and114
相关论文
共 17 条
  • [1] DUFRANE K F, KANNEL J W, MCCLOSKEY T H., Wear of steam turbine journal bearings at low operating speeds, Journal of Lubrication Technology, 105, 3, pp. 313-317, (1983)
  • [2] SHARMA S, AWASTHI R K., Effect of aspect ratio on the performance of hydrodynamic journal bearing opera-ting under wear, International Journal of Theoretical and Applied Mechanics, 12, 3, pp. 497-522, (2017)
  • [3] LU Longsheng, FANG -HE Zhengzi, XIE Yingxi, Et al., Friction behavior of carbon fiber forged composite, Journal of South China University of Technology(Natural Science Edition), 47, 1, pp. 7-13, (2019)
  • [4] LIU Gang, LI Ming, Lubrication characteristics of water-lubricated rubber bearings with partial wear, Journal of Fluids Engineering, 142, 2, (2020)
  • [5] WONG V W, TUNG S C., Overview of automotive engine friction and reduction trends: effects of surface, material, and lubricant-additive technologies, Friction, 4, 1, pp. 1-28, (2016)
  • [6] JAKOBSSON B, FLOBERG L., The finite journal bea-ring considering vaporization, Transactions of Chalmers University of Technology, 190, pp. 1-116, (1957)
  • [7] OLSSON K O., Cavitation in dynamically loaded bea-rings, Transaction of Chalmers University of Technology, 308, pp. 1-60, (1965)
  • [8] ELROD H G., A cavitation algorithm, Journal of Lubrication Technology, 103, 3, pp. 350-354, (1981)
  • [9] PAYVAR P, SALANT R F., A computational method for cavitation in a wavy mechanical seal, Journal of Tribology, 114, 1, pp. 199-204, (1992)
  • [10] RAJAK D K, PAGAR D D, KUMAR R, Et al., Recent progress of reinforcement materials: a comprehensive overview of composite materials, Journal of Materials Research and Technology, 8, 6, pp. 6354-6374, (2019)
12