Influence of the Geometry on the Rolling Friction Torque in Lubricated Ball-Race Contacts

Mihaela Rodica Balan; Vasile Ciprian Stamate; Luc Houpert; Ana Tufescu; Dumitru Olaru

doi:10.4028/www.scientific.net/AMM.658.271

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 658Influence of the Geometry on the Rolling Friction...

Influence of the Geometry on the Rolling Friction Torque in Lubricated Ball-Race Contacts

Abstract:

Based on a theoretical model and an experimental methodology for defining the friction torque in a modified thrust ball bearing having only 3 balls and presented in [2], the authors experimentally investigated the influence of the ball diameter on friction torque when operating in mixed and full film lubrication conditions and maintaining the normal load, the race curvature and oil viscosity constant. The experiments were realized using ball diameters between 7.938 mm and 3 mm corresponding to maximum Hertzian pressure between 0.264 GPa and 1 GPa and a rotational speed between 60 rpm to 240 rpm. The experiments confirmed that the measured friction torque can be explained using hydrodynamic rolling force relationships respecting the transition from IsoViscous Rigid (IVR) to ElastoHydrodynamic Lubrication (EHL) regime presented in [2].

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Periodical:

Applied Mechanics and Materials (Volume 658)

Pages:

271-276

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.658.271

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Online since:

October 2014

Authors:

Mihaela Rodica Balan, Vasile Ciprian Stamate, Luc Houpert, Ana Tufescu, Dumitru Olaru*

Keywords:

Elastohydrodynamics, Lubricated Contacts, Rolling Friction, Thrust Ball Bearing

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References

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