A mixed-lubricated friction model of water lubricated bearing based on fractal theory

IF 1.6 3区 工程技术 Q3 ENGINEERING, MECHANICAL
Chuang Wu, Yinbo Wang, F. Chen, X. Long
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引用次数: 0

Abstract

To the water lubricated bearing, its mixed-lubricated friction model is generally established based on the traditional statistical model, whose accuracy is not high due to the inaccurate characterization of surface topography. Therefore, this paper employs the fractal theory that has scale-independent characteristics and high precision to characterize the surface topography of the bearing and journal, and then establishes the fractal contact model of asperity, combining the average Reynolds equation of the film, proposes a mixed-lubricated friction model based on fractal theory. The scanning experiments of surface topography are carried out to obtain the fractal parameters and measurements of the friction coefficient are performed to verify the effectiveness of the proposed mixed-lubricated model. Subsequently, the proposed mixed-lubricated friction model is employed to analyze the effects of the number of groove, the position of groove and the fractal parameters on the lubrication and friction characteristics of the water lubricated bearing. Results indicate when the grooves are in the non-main load-carrying regions, the friction characteristics of the bearing slightly changes, and the lower surface roughness is beneficial to improve the lubrication and friction properties of the bearing.
基于分形理论的水润滑轴承混合润滑摩擦模型
对于水润滑轴承,其混合润滑摩擦模型一般是基于传统的统计模型建立的,由于表面形貌表征不准确,其精度不高。因此,本文采用具有尺度无关性和高精度的分形理论对轴承和轴颈表面形貌进行表征,然后建立粗糙度的分形接触模型,结合膜的平均雷诺兹方程,提出了基于分形理论的混合润滑摩擦模型。通过表面形貌扫描实验获得了分形参数,并通过摩擦系数测量验证了混合润滑模型的有效性。随后,利用所建立的混合润滑摩擦模型,分析了沟槽数、沟槽位置和分形参数对水润滑轴承润滑摩擦特性的影响。结果表明,当沟槽位于非主承载区域时,轴承的摩擦特性略有变化,较低的表面粗糙度有利于提高轴承的润滑和摩擦性能。
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来源期刊
CiteScore
4.20
自引率
5.00%
发文量
110
审稿时长
6.1 months
期刊介绍: The Journal of Engineering Tribology publishes high-quality, peer-reviewed papers from academia and industry worldwide on the engineering science associated with tribology and its applications. "I am proud to say that I have been part of the tribology research community for almost 20 years. That community has always seemed to me to be highly active, progressive, and closely knit. The conferences are well attended and are characterised by a warmth and friendliness that transcends national boundaries. I see Part J as being an important part of that community, giving us an outlet to publish and promote our scholarly activities. I very much look forward to my term of office as editor of your Journal. I hope you will continue to submit papers, help out with reviewing, and most importantly to read and talk about the work you will find there." Professor Rob Dwyer-Joyce, Sheffield University, UK This journal is a member of the Committee on Publication Ethics (COPE).
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