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ORIGINAL RESEARCH article
Front. Mech. Eng.
Sec. Tribology
Volume 11 - 2025 | doi: 10.3389/fmech.2025.1522524
This article is part of the Research Topic Visualization Techniques in Tribology View all 16 articles
An in-situ experimental method for monitoring viscosity change and oil amount during sliding test
Provisionally accepted- Japan Aerospace Exploration Agency (JAXA), Tokyo, Japan
In this study, a method was proposed to measure viscosity and oil quantity without breaking the vacuum during a sliding test using a small amount of lubricating oil in a vacuum. Using this method, changes in viscosity and oil quantity until the end of lubrication life were measured in a sliding test using a small amount of MAC. As a result, an increase in viscosity and a decrease in oil quantity were observed. The measured results discussed the relationship between the increase in viscosity and the frictional work or sliding distance, and indicated that the lubrication condition at the lubrication life was severely starvation.
Keywords: oil degradation, Starved EHL, Viscosity measurement, Lubrication life, Vacuum, Visualization test
Received: 04 Nov 2024; Accepted: 15 Jan 2025.
Copyright: © 2025 Shiomi and Obara. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Hiroshi Shiomi, Japan Aerospace Exploration Agency (JAXA), Tokyo, Japan
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