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On the elastohydrodynamic lubrication in soft seals
Wear, 1984This communication is concerned with the elastohydrodynamic lubrication(EHL) problem in soft seals under reciprocating motion. The aim is todemonstrate theoretically that, if the Reynolds equation for isoviscous fluidsis coupled with a Winkler foundation [l] describing the seal deformabilityand if it is assumed that the dry contact pressure vanishes at
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Elastohydrodynamic Lubrication of Air-Lubricated Rollers
Journal of Tribology, 1996Abstract The lubricating air film between two rotating rollers in close contact was studied numerically. The numerical model used in this study accounts for the effects of air compressibility, material deformation, and the slip flow which occurs when the air film thickness is not much larger than the mean-free-path of the air molecules ...
Y. B. Chang +2 more
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Parched Elastohydrodynamic Lubrication
Journal of Tribology, 1985A parched subregime of elastohydrodynamic lubrication is proposed, lying between starved and mixed. Parched EHL is necessary to describe instrument ball bearing behavior, for example: long term transients in film thickness. A parched bearing has the least driving torque demand and best spin axis definition possible from any lubrication regime.
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The failure of elastohydrodynamic lubrication
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1984Abstract Scuffing experiments were made with circumferentially ground steel discs in a two-disc machine. The load was increased in stages until scuffing failure occurred, as indicated by a sharp increase in noise, vibration and friction.
R. W. Snidle, S. D. Rossides, A. Dyson
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Modelling of Lubricant Degradation and Elastohydrodynamic Lubrication
2006The paper presents a new approach to modeling elastohydrodynamic contacts with degrading lubricants. Considered lubricants are diluted solutions of polymer molecules with linear structure. The problem is formulated mathematically and analyzed numerically. A parametric analysis of the problem is performed.
Kudish, Ilya I. +2 more
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Influence of lubricant properties on elastohydrodynamic lubrication
Wear, 1999Abstract In hard EHL, encountered in, e.g., gears, rolling element bearings etc. the properties of the lubricant play a significant role in the forming of a lubricating film and reducing friction between the contacting surfaces. The influence of pressure and temperature on viscosity, limiting shear stress and density, has to be taken into account ...
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Elastohydrodynamic lubrication: A lubricant industry perspective
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 1999The twin challenges facing the automotive and lubricants industries as we approach the millennium are: how to reduce the levels of gaseous emissions and how to achieve increased durability. Improved durability is necessary in order to maintain low levels of emissions.
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Elastohydrodynamic Lubrication Theory
1993Publisher Summary This chapter focuses on the load capacity of the conventional, liquid-lubricated, journal bearing benefits from the close conformity between two surfaces. Common forms of thrust bearing have films of similar proportions. This is not applicable for gear tooth engagements, cams and followers, and nor for the contact between rolling ...
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Nanometer Elastohydrodynamic Lubrication
1997The ultra-thin film optical interferometry technique has extended the exploration of elastohydrodynamic (EHD) lubrication to a regime where film thickness is measured in nanometers. With the gap between the lubricated surfaces corresponding to the width of just a few molecules, investigations are now being made into the validity of classical EHD theory
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