Effect of Surface Roughness on Mixed-Lubrication Performance of Low-Speed and Water-Lubricated Sliding Bearings

doi:10.7652/xjtuxb202007015

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Effect of Surface Roughness on Mixed-Lubrication Performance of Low-Speed and Water-Lubricated Sliding Bearings

更新时间：2025-07-09

- Effect of Surface Roughness on Mixed-Lubrication Performance of Low-Speed and Water-Lubricated Sliding Bearings
- Vol. 54, Issue 7, Pages: 121-128(2020)
- 作者机构：
  
  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,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202007015
  CLC： TH133
- Online First：10 July 2020，
  
  Published：2020
- 稿件说明：
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Effect of Surface Roughness on Mixed-Lubrication Performance of Low-Speed and Water-Lubricated Sliding Bearings[J]. 2020, 54(7): 121-128.
DOI：

Effect of Surface Roughness on Mixed-Lubrication Performance of Low-Speed and Water-Lubricated Sliding Bearings[J]. 2020, 54(7): 121-128. DOI： 10.7652/xjtuxb202007015.

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 characteri-ed 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 analy-e 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 studi

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