Affiliation:
1. Nagaoka University of Technology Department of Mechanical Engineering, , 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 , Japan
Abstract
Abstract
This paper deals with rolling traction in isoviscous-rigid (IVR), piezoviscous-rigid (PVR), and elastohydrodynamic lubrication (EHL) regimes at line contact. First, a measuring method of rolling traction using the two-disk machine supported by ball bearings was explained. Then, the rolling traction in the IVR, PVR, and EHL regimes at line contact was measured. The measured results showed that as load P increases, the time average rolling traction FR AVG in the IVR and PVR regimes increases, while that in the EHL regime does not significantly increase. The measured FR AVG was lower than the rolling traction FR TED/CPA under the isothermal condition calculated by using the commercial software TED/CPA. To establish the rolling traction expression, a rolling traction expression under the isothermal condition FR iso was first derived by means of curve fitting the calculated FR TED/CPA. Then, a rolling traction expression (which takes into account the thermal effects of the inlet shear heating) FR thermal was derived by multiplying the thermal correction factor Ct to the expression FR iso. Finally, it was shown that the proposed expression FR thermal is effective for estimating the rolling traction in the IVR, PVR, and EHL regimes at line contact.
Funder
Japan Society for the Promotion of Science
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference25 articles.
1. Piezoviscous-Rigid Rolling and Sliding Traction Forces, Application: The Rolling Element-Cage Pocket Contact;Houpert;ASME J. Tribol.,1987
2. EHL Mode Analysis of Tribo-Machine Elements;Nakahara,1998
3. The Lubrication of Gear-Teeth;Martin;Engineering,1916
4. The Lubrication of Rollers, Ⅳ. Measurements of Friction and Effective Viscosity;Crook;Philos. Trans. R. Soc. London, Ser. A,1963