Surface topography plays an important role in the efficiency of lubricated contacts formed between highly loaded machine parts. Gears, rolling bearings, cam and followers etc. subjected to high loads and/or slow speeds are operated under mixed lubrication when lubrication film is not able to completely separate rubbing surfaces. Such an effect becomes even more serious under transient conditions that bring the risk of the surface damage because of asperities interactions. This paper focuses on the effects of both artificially produced and real roughness features on mixed lubrication film formation during start up motion of non-conformal contacts operated under rolling/sliding conditions. The observation of the effects of surface dents artificially produced on the ball surface helped to understand better the behavior of real surface topography. It was found that the presence of shallow surface features can help to separate mixed lubricated rubbing surfaces more efficiently than it could be suggested from the results obtained with smooth surfaces.
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ASME/STLE 2009 International Joint Tribology Conference
October 19–21, 2009
Memphis, Tennessee, USA
Conference Sponsors:
- Tribology Division
ISBN:
978-0-7918-4895-1
PROCEEDINGS PAPER
Effect of Surface Topography on Mixed Lubrication Film Under Transient Conditions
Ivan Krupka,
Ivan Krupka
Brno University of Technology, Brno, Czech Republic
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Martin Hartl,
Martin Hartl
Brno University of Technology, Brno, Czech Republic
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Petr Svoboda
Petr Svoboda
Brno University of Technology, Brno, Czech Republic
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Ivan Krupka
Brno University of Technology, Brno, Czech Republic
Martin Hartl
Brno University of Technology, Brno, Czech Republic
Petr Svoboda
Brno University of Technology, Brno, Czech Republic
Paper No:
IJTC2009-15050, pp. 481-482; 2 pages
Published Online:
February 16, 2010
Citation
Krupka, I, Hartl, M, & Svoboda, P. "Effect of Surface Topography on Mixed Lubrication Film Under Transient Conditions." Proceedings of the ASME/STLE 2009 International Joint Tribology Conference. ASME/STLE 2009 International Joint Tribology Conference. Memphis, Tennessee, USA. October 19–21, 2009. pp. 481-482. ASME. https://doi.org/10.1115/IJTC2009-15050
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