Development of wear and pitting curves with vibration analysis for lubricating grease under contamination conditions

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2024-11-05 DOI:10.1016/j.wear.2024.205625

Jeng-Haur Horng , Thi-Na Ta , Chun-Wei Kuo , Sheng-Jie Liao , Yang-Yuan Chen

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引用次数: 0

Abstract

The application of grease under contaminated environmental conditions typically leads to its degradation and subsequent damage to lubricated surfaces. This study examines the effects of various concentrations of environmental particles and water content, both separately and in combination, on the variation of tribological characteristics of lithium-based grease during wear. Wear and pitting curves are established for grease contaminated with varying weight percentages of water and particles. The introduction of water into grease reduces wear by absorbing friction heat but increases pitting, while particles extend the running-in period and destabilize surface roughness. In mixed conditions, particles exert a greater influence on the tribological behavior than water. To improve pitting monitoring, vibration indicators FM4 and NA4 are modified by incorporating the cumulative effect of the friction coefficient over time, accounting for the progressive accumulation of wear and vibration energy. The modified FM4 indicator proves more effective in detecting pitting variations under contaminated conditions.

查看原文本刊更多论文

利用振动分析法绘制污染条件下润滑油脂的磨损和点蚀曲线

在受污染的环境条件下使用润滑脂通常会导致其降解，进而损坏润滑表面。本研究探讨了不同浓度的环境颗粒和水含量单独或共同作用对磨损过程中锂基润滑脂摩擦学特性变化的影响。针对被不同重量百分比的水和颗粒污染的润滑脂，建立了磨损和点蚀曲线。在润滑脂中加入水可以通过吸收摩擦热来减少磨损，但会增加点蚀，而颗粒则会延长磨合期并破坏表面粗糙度的稳定性。在混合条件下，颗粒对摩擦学行为的影响比水更大。为了改进点蚀监测，对振动指标 FM4 和 NA4 进行了改进，加入了摩擦系数随时间变化的累积效应，考虑了磨损和振动能量的逐步累积。事实证明，改进后的 FM4 指标能更有效地检测污染条件下的点蚀变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.