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On the surface lift-off transition in rough surface EHL contacts
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-3637-9078
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0002-4271-0380
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-9110-2819
2019 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

The pumping and churning losses in transmission assemblies are minimized when gears are operated in low viscosity lubricants. Therefore, in order to improve gear efficiency, it is of crucial importance to gain knowledge about the underlying mechanism that governs elastohydrodynamic (EHL) contacts ability to form a separating oil film. This study was set out to explore the necessary requirements for EHL contacts to achieve a state of full film separation. A ball on disc device, arranged for electrical contact resistance (ECR) measurement, was operated under a wide variety of heavily loaded rolling/sliding conditions. Friction and ECR-signal were simultaneously monitored to capture the contact performance until surfaces achieved lift-off by adequate surface modification due to running-in. Special emphasis was set on post-test surface analysis to reveal whether any surface roughness parameter could provide insights in the pre-requisite for surface lift to take place.

Place, publisher, year, edition, pages
2019.
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-75989OAI: oai:DiVA.org:ltu-75989DiVA, id: diva2:1351235
Conference
STLE Annual Meeting & Exhibition, Nashville, TN, USA, May 19-23
Available from: 2019-09-13 Created: 2019-09-13 Last updated: 2019-09-13

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Hansen, JonnyBjörling, MarcusLarsson, Roland
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Citation style
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  • modern-language-association-8th-edition
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Language
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  • nn-NB
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  • Other locale
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Output format
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  • asciidoc
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