期刊
LUBRICANTS
卷 6, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/lubricants6010017
关键词
elastohydrodynamic; DLC coatings; friction; gears; thermal insulation; EHL simulation
资金
- German Research Foundation (DFG)
- Technical University of Munich (TUM)
Diamond-Like Carbon (DLC) coatings can reduce fluid friction in TEHL contacts (thermo-elastohydrodynamic lubrication) of meshing gears. This study investigates the influence of different base oils i.e., mineral, polyalphaolefin and polyglycol oil on the friction of DLC coated spur gears. Thereby, a transient TEHL simulation model based on the finite element based full-system approach coupled iteratively with the thermal equations is applied, considering mechanical and thermal properties of the DLC coatings. Results show a clear reduction of fluid friction in DLC coated gears for all considered lubricants. This can be traced back to higher TEHL temperatures for DLC coated gears, which is due to its low thermal inertia resulting in a thermal insulation effect.
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