[1]刘洋洋,金英泽,王亚兵,等.表面粗糙度对低速水润滑滑动轴承混合润滑性能的影响[J].西安交通大学学报,2020,54(07):121-128.[doi:10.7652/xjtuxb202007015]
 LIU Yangyang,JIN Yingze,WANG Yabing,et al.Effect of Surface Roughness on Mixed-Lubrication Performance of Low-Speed and Water-Lubricated Sliding Bearings[J].Journal of Xi'an Jiaotong University,2020,54(07):121-128.[doi:10.7652/xjtuxb202007015]
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表面粗糙度对低速水润滑滑动轴承混合润滑性能的影响
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《西安交通大学学报》[ISSN:0253-987X/CN:61-1069/T]

卷:
54
期数:
2020年第07期
页码:
121-128
栏目:
出版日期:
2020-07-08

文章信息/Info

Title:
Effect of Surface Roughness on Mixed-Lubrication Performance of Low-Speed and Water-Lubricated Sliding Bearings
文章编号:
0253-987X(2020)07-0121-08
作者:
刘洋洋1 金英泽1 王亚兵1 王报龙1 祝长生2 袁小阳1
1.西安交通大学现代设计及转子轴承系统教育部重点实验室, 710049, 西安; 2.浙江大学电气工程学院, 310058, 杭州
Author(s):
LIU Yangyang1 JIN Yingze1 WANG Yabing1 WANG Baolong1 ZHU Changsheng2 YUAN Xiaoyang1
Xi’an 710049, China; 2. College of Electrical Engineering, Zhejiang University, Hangzhou 310058, China
关键词:
滑动轴承 混合润滑 表面粗糙度 低速水润滑
Keywords:
sliding bearing mixed lubrication surface roughness low-speed and water-lubricated
分类号:
TH133
DOI:
10.7652/xjtuxb202007015
文献标志码:
A
摘要:
针对船用滑动轴承在低速水润滑工况下液膜承载能力不足导致的局部固体接触碰磨问题,研究了表面粗糙度对水润滑滑动轴承混合润滑性能的影响。假设轴颈和轴承表面粗糙峰服从高斯分布,以粗糙峰高度综合标准差表征表面粗糙度,联立平均雷诺流体润滑方程和GreenwoodTripp(GT)固体表面接触方程,对比分析了全膜润滑和混合润滑下的液膜厚度和压力分布,针对几种典型转速研究了表面粗糙度对轴承的液膜承载力及其最大压力、粗糙峰接触承载力及其最大压力、偏心率和最小名义膜厚的影响。数值计算结果表明:在低速水润滑工况下,混合润滑模型的最大液膜压力比全膜润滑模型降低一个数量级以上,粗糙峰接触压力的产生使得最小名义膜厚增加; 随着表面粗糙度的增加,液膜承载力、偏心率、最大液膜压力和最大粗糙峰接触压力呈减小趋势,粗糙峰接触承载力和最小名义膜厚呈增加趋势; 在混合润滑下转速对最小名义膜厚和偏心率的变化曲线没有影响。该研究可对低速水润滑滑动轴承优化及可靠性设计提供一定的参考。
Abstract:
In order to solve the problem of insufficient liquid film bearing capacity of marine sliding bearings caused by local solid contact and rubbing under low-speed and water-lubricated conditions, the influence of surface roughness on the mixed lubrication performance of water-lubricated sliding bearings is studied. This paper assumes that the asperities on the journal and bearing surfaces follow the Gaussian distribution, and the surface roughness is characterized by the comprehensive standard deviation of the heights of the asperities. The average Reynolds fluid lubrication equation and the Greenwood-Tripp(GT)solid surface contact equation are combined to compare and analyze the thickness and pressure distribution of the liquid film under full film lubrication and mixed lubrication. The effects of surface roughness on liquid film bearing capacity and maximum pressure, asperity contact bearing capacity and maximum pressure, eccentricity, and minimum nominal liquid film thickness are studied at several typical rotating speeds. Numerical calculation results show that when sliding bearings are under low-speed and water-lubricated conditions, the maximum liquid film pressure of the mixed lubrication model can be reduced by more than an order of magnitude than that of the full film lubrication model. Asperity contact pressure makes the minimum nominal film thickness increase. As the surface roughness increases, the liquid film bearing capacity, eccentricity, maximum liquid film pressure and maximum asperity contact pressure decrease, and the asperity contact bearing capacity and minimum nominal film thickness increase. The rotating speed has no effect on the changing curves of the minimum nominal film thickness and eccentricity under mixed lubrication. This research may provide a reference for the optimization and reliability design of low-speed and water-lubricated sliding bearings.

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备注/Memo

备注/Memo:
收稿日期: 2020-01-14。作者简介: 刘洋洋(1994—),男,博士生; 袁小阳(通信作者),男,教授,博士生导师。基金项目: 基础产品创新科研资助项目(CZ362)。
更新日期/Last Update: 2020-07-10