The effects of speed, load and roller geometry on the oil film thickness and shape in a complete roller bearing are demonstrated experimentally by means of optical interferometry.
At quite moderate roller speeds, increase of film thickness becomes inhibited. This effect is attributed to a truncated inlet meniscus, a similar condition having been observed elsewhere with a ball-and-plate machine and with a model of a tapered-roller thrust bearing.
Get full access to this article
View all access options for this article.
References
1.
FoordC. A.HammanW. C.CameronA.‘Evaluation of lubricants using optical elastohydrodynamics’, Asle Trans.196811, 31.
2.
GoharR.‘Oil film thickness and rolling friction in elasto-hydrodynamic point contact’, J. Lubric. Technol. Asme Trans.197193 (Series F, No. 3).
3.
WymerD. G.CameronA.‘Elastohydrodynamic lubrication of a line contact. Part 1: Optical analysis of a roller bearing’, Proc. Instn mech. Engrs1973–1974188, 221–231.
4.
ThorpN.GoharR.‘Oil film thickness and shape for a ball sliding in a grooved raceway’, Paper No. 71-Lub-18, Asme Lubrication Conference October 1971.
5.
WedevenL. D.EvansD.CameronA.‘Optical analysis of ball bearing starvation’, J. Lubric. Technol. Asme Trans.197193 (Series F, No. 3).
6.
LanghaarH. L.Dimensional analysis and the theory of models1931 (John Wiley).
7.
DowsonD.‘Elastohydrodynamics - Fundamentals and applications to design’, Paper No. 10, Convention on Lubrication and Wear, Proc. Instn mech. Engrs.1967–68, 182 (Pt 3A).
8.
GreenwoodJ. A.KauzlarichJ. J.‘Inlet shear heating in elastohydrodynamic lubrication’, Paper No. 72-Lub-21, Asme-Asle Lub. Conf. October 1972, New York.
9.
ChiuY. P.‘An analysis and prediction of lubricant film starvation in rolling contact systems’, Preprint 73Am-36-4 Asle Mtg, May 1973, Chicago.
10.
GrubinA. N.VinogradovaI. E.Central Scientific Research Institute for Technology and Mechanical Engineering, Book30 (Moscow); D.S.I.R. Trans. No. 337, 1949.
11.
SamanW. Y.DowsonD.Contribution to the discussion of Paper C35 by P. Castle and D. Dowson. Symp. Elastohydr. Lubric.1971, 190–191 (Institution of Mechanical Engineers, London).
12.
WolveridgeP. E.BaglinK. P.ArchardJ. F.‘The starved lubrication of cylinders in line contact’, Proc. Instn mech. Engrs1970–1971185, 1159–1169.
