Geometrical Optimization of the EHL Roller Face/Rib Contact for Energy Efficiency in Tapered Roller
Wirsching S, Marian M, Bartz M, Stahl T, Wartzack S (2021)
Publication Language: English
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 9
Pages Range: 67
Journal Issue: 7
DOI: 10.3390/lubricants9070067
Open Access Link: https://doi.org/10.3390/lubricants9070067
Abstract
In the context of targeted improvements in energy efficiency, secondary rolling bearing contacts are gaining relevance. As such, the elastohydrodynamically lubricated (EHL) roller face/rib contact of tapered roller bearings significantly affects power losses. Consequently, this contribution aimed at numerical optimization of the pairing’s macro-geometric parameters. The latter were sampled by a statistical design of experiments (DoE) and the tribological behavior was predicted by means of EHL contact simulations. For each of the geometric pairings considered, a database was generated. Key target variables such as pressure, lubricant gap and friction were approximated by a meta-model of optimal prognosis (MOP) and optimization was carried out using an evolutionary algorithm (EA). It was shown that the tribological behavior was mainly determined by the basic geometric pairing and the radii while eccentricity was of subordinate role. Furthermore, there was a trade-off between high load carrying capacity and low frictional losses. Thereby, spherical or toroidal geometries on the roller end face featuring a large radius paired with a tapered rib geometry were found to be advantageous in terms of low friction. For larger lubricant film heights and load carrying capacity, spherical or toroidal roller on toroidal rib geometries with medium radii were favorable.
Authors with CRIS profile
Sven Wirsching
Chair of Engineering Design
Max Marian
Chair of Engineering Design
Marcel Bartz
Chair of Engineering Design
Sandro Wartzack
Chair of Engineering Design
Additional Organisation(s)
Involved external institutions
Germany (DE)How to cite
APA:
Wirsching, S., Marian, M., Bartz, M., Stahl, T., & Wartzack, S. (2021). Geometrical Optimization of the EHL Roller Face/Rib Contact for Energy Efficiency in Tapered Roller. Lubricants, 9(7), 67. https://dx.doi.org/10.3390/lubricants9070067
MLA:
Wirsching, Sven, et al. "Geometrical Optimization of the EHL Roller Face/Rib Contact for Energy Efficiency in Tapered Roller." Lubricants 9.7 (2021): 67.
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