Experimental results and analytical film thickness predictions in EHD rolling point contacts |
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Authors: | J-P Chaomleffel G Dalmaz P Vergne |
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Affiliation: | aLaMCoS, INSA-Lyon, CNRS UMR5259, Bâtiment Jean d'Alembert, 18-20 rue des Sciences, F69621 Villeurbanne Cedex, France |
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Abstract: | In this work, we consider several types of lubricants—including non-Newtonian fluids—that were studied in EHD pure rolling point contacts under various operating conditions, leading us to explore a wide range of dimensionless parameters. The experimental results are compared with predictions given by the usual analytical EHL relationships and by more recently developed models. This broad comparison conducted with particular emphasis on minimum film thickness (hm) showed a fair agreement between experimental data and a few predictions including some obtained from extended models. Commonly used elastohydrodynamic lubrication (EHL) models did not systematically give accurate hm estimation, whereas minimum film thickness not only is a yield value but also serves as a key parameter in estimating lubrication regimes. |
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Keywords: | EHD rolling point contact EHL minimum film thickness Lubricant properties Non-Newtonian behaviour Shear-thinning effect |
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