有限润滑条件下滑块与圆盘接触时表面润湿性驱动的油膜形成

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Zhaogang Jing, Yusheng Jian, Feng Guo, Penghao Duan, Pat Lam Wong, Ziying Li
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引用次数: 0

摘要

本研究探讨了在有限润滑剂供应(LLS)条件下,调节表面润湿性对流体动力润滑接触面油膜形成的影响。利用圆盘滑块润滑膜试验台,测量了三种表面润湿性配置的油膜厚度:原始圆盘表面和原始滑块侧表面(OD &;OS),防指纹(AF)涂层光盘表面和原始滑块侧表面(AFD &;OS),以及af涂层圆盘表面和af涂层滑块侧表面(AFD &;AFS)。结果表明,AFD &;AFS组合保持最大的油膜厚度。这种增强的性能是由于油在AFD上的不润湿行为。AFS表面,特别是不连续的油滴/油条通过脱湿,促进更多的润滑剂供应到滑块入口。油在进口处以凸储层的形式积聚,产生正拉普拉斯压力,有效承担部分负荷,油膜厚度增大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Surface wettability-driven oil film formation in slider-on-disc contact under limited lubrication

Surface wettability-driven oil film formation in slider-on-disc contact under limited lubrication

The effects of tuned surface wettability on oil film formation in a hydrodynamically lubricated contact with a limited lubricant supply (LLS) were explored in this study. Using a slider-on-disc lubricating film test rig, the oil film thickness was measured for three surface wettability configurations: the original disc surface and original slider side surface (OD & OS), the anti-fingerprint (AF)-coated disc surface and original slider side surface (AFD & OS), and the AF-coated disc surface and the AF-coated slider side surface (AFD & AFS). The results indicate that the AFD & AFS combination maintains the largest oil film thickness. This enhanced performance is due to the oil’s nonwetting behavior on the AFD & AFS surfaces, particularly the discontinuous oil droplet/strip by dewetting, which promotes more lubricant supply at the slider inlet. Moreover, the oil accumulates at the inlet in the form of a convex reservoir so that positive Laplace pressure is generated, which effectively bears part of the load, and the film thickness increases.

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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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