Investigation on Acoustic Emission Characteristics of Lubricating Grease in Hydrodynamic Lubrication Regime

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2025-04-13 DOI:10.1007/s11249-025-01995-0

Xuanrui Zhang, Dong Zhen, Guojin Feng, Zewen Zhou, Xiaoxia Liang, Hao Zhang, Fengshou Gu

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引用次数: 0

Abstract

Traditional methods for monitoring lubrication and wear typically rely on indirect indicators such as temperature changes, vibration, or lubricant contamination. However, these approaches have limitations in that they are unable to provide real-time, direct insights into the micro-scale interactions occurring between frictional interfaces. This paper aims to explore the mechanisms and characteristics of acoustic emission (AE) signals generated by lubricants, particularly greases, in hydrodynamic lubrication (HL) regime, thereby enabling early detection of surface wear and degradation in mechanical systems. Based on the fundamental theory of elastic deformation strain energy release from micro-asperities, a model for AE signals of lubricants in HL regime was established. Experimental studies using a rheometer platform were conducted on lubricants to compare their flow properties and related friction signals. The results indicate that both lubricating greases and oils share similar characteristics, where shear rate and lubricant viscosity are significant factors affecting AE signals. These findings provide essential references for monitoring the lubrication state of friction pairs and the health condition of lubricants, especially in detecting early surface wear.

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流体动力润滑状态下润滑脂的声发射特性研究

监测润滑和磨损的传统方法通常依赖于间接指标，如温度变化、振动或润滑剂污染。然而，这些方法有局限性，因为它们无法实时、直接地了解摩擦界面之间发生的微观相互作用。本文旨在探讨润滑油（特别是润滑脂）在流体动力润滑（HL）状态下产生的声发射（AE）信号的机制和特征，从而能够早期检测机械系统的表面磨损和退化。基于微颗粒弹性变形应变能释放的基本理论，建立了润滑油在HL状态下的声发射信号模型。利用流变仪平台对润滑油进行了实验研究，比较了润滑油的流动特性和相关的摩擦信号。结果表明，润滑脂和润滑油具有相似的特性，其中剪切速率和润滑油粘度是影响声发射信号的重要因素。这些发现为监测摩擦副的润滑状态和润滑剂的健康状况，特别是早期表面磨损的检测提供了重要的参考。

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

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.