一种用于改善缺油润滑下点接触摩擦学性能的凹坑纹理表面。

A Pocket-Textured Surface for Improving the Tribological Properties of Point Contact under Starved Lubrication.

作者信息

Wang Wei, Zhao Wenhan, Liu Yang, Zhang Hui, Hua Meng, Dong Guangneng, Tam Hon-Yuen, Chin Kwai-Sang

机构信息

School of Mechanical Engineering, Institute of Design Science and Basic Components, Xi'an Jiaotong University, Xi'an 710049, China.

Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.

出版信息

Materials (Basel). 2021 Apr 5;14(7):1789. doi: 10.3390/ma14071789.

DOI:10.3390/ma14071789

PMID:33916343

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8038587/

Abstract

This paper reports a novel pocket-textured surface for improving the tribological properties of point contact under starved lubrication by possibly storing and releasing oil, and homogenizing the surface contact pressure. The ball-on-disk experimental results confirmed the coefficient of friction (COF) and wear reduction effect of such pocket-texturing. The maximum reduction rate was 40% compared with a flat surface under the same operating conditions. Analyses on experimental results attributed the oil storage effect and enhanced the secondary lubrication effect within the starved lubrication state, to become the main mechanism. In addition, the plate elasticity and the Hertzian contact principles were employed to estimate the pressure and the load acting on the surface. The experimental results and numerical analysis substantiated the design of pocket-textured surface, making it likely to enlarge about 50% of contact surface and to reduce 90% of equivalent stress in comparison to those of conventional surfaces.

摘要

本文报道了一种新型的凹坑纹理表面，通过储存和释放润滑油以及使表面接触压力均匀化，改善了缺油润滑下点接触的摩擦学性能。球-盘实验结果证实了这种凹坑纹理的摩擦系数（COF）和减磨效果。在相同工况下，与平面相比，最大降低率为40%。对实验结果的分析表明，储油效应以及在缺油润滑状态下增强的二次润滑效应成为主要机制。此外，利用板的弹性和赫兹接触原理来估算作用在表面上的压力和载荷。实验结果和数值分析证实了凹坑纹理表面的设计，与传统表面相比，其接触面积可能增大约50%，等效应力降低90%。