Journal ArticleDOI
Gear lubrication—a review
A. V. Olver
- Vol. 216, Iss: 5, pp 255-267
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TLDR
In this paper, a simple estimate of the thickness of the lubricating film in a typical pair of spur gears is presented on the basis of classical smooth-body isothermal, elastohydrodynamic lubrication theory.Abstract:
The lubrication of gear teeth is reviewed including some key aspects of recent theoretical research and current practice. A simple estimate of the thickness of the lubricating film in a typical pair of spur gears is presented on the basis of classical smooth-body isothermal, elastohydrodynamic lubrication theory. The deficiencies of this simple calculation are then discussed; these include roughness, friction, churning, starvation and contamination, all common features of practical gearing. Three simple methods are described for estimating the tooth temperature and its consequent effect on film thickness.read more
Citations
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Journal ArticleDOI
Effects of lubrication on gear performance: A review
TL;DR: This work reviews gear lubrication papers with focus on gear efficiency, contact fatigue and dynamics, and compile and categorize key investigations in an expansive field with substantial recent research.
Journal ArticleDOI
Effect of Humidity on Friction and Wear—A Critical Review
TL;DR: In this article, the effects of humidity on macro and nano-scale friction and wear of various types of materials are reviewed, including graphite and graphene, diamond-like carbon (DLC), ultrananocrystalline diamond (UNCD), transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), boric acid, silicon, silicon oxide, silicates, advanced ceramics, and metals.
Journal ArticleDOI
Observations of acoustic emission activity during gear defect diagnosis
Tim Toutountzakis,David +1 more
TL;DR: In this article, an ongoing experimental investigation on the application of acoustic emission (AE) for gear defect diagnosis is presented, where the possibility of monitoring gear defects from the bearing casing is examined.
Journal ArticleDOI
Performance, emissions and lubricant oil analysis of diesel engine running on emulsion fuel
A.K. Hasannuddin,J.Y. Wira,S. Sarah,Wan Syaidatul Aqma,Abdul Hadi,N. Hirofumi,S.A. Aizam,M.A.B. Aiman,S. Watanabe,Muhammad Ahmad,M.A. Azrin +10 more
TL;DR: In this paper, the authors investigated the effect of lubricant oil in diesel engine that operated using emulsion fuels for 200h in comparison with Malaysian conventional diesel fuel (D2).
Journal ArticleDOI
Gear Windage: A Review
Carol Eastwick,Graham Johnson +1 more
TL;DR: In this paper, the authors provide a review of experimental investigations and available models of gear windage power loss for spur, helical, and bevel gears for high-speed applications.
References
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Journal ArticleDOI
On the Theory of Lubrication and Its Application to Mr. Beauchamp Tower's Experiments, Including an Experimental Determination of the Viscosity of Olive Oil
TL;DR: In this paper, the authors considered the boundary or surface actions of fluids and proposed a theoretical treatment of the physical actions of oils and other viscous fluids to diminish friction and wear between solid surfaces.
Journal ArticleDOI
I. On the theory of lubrication and its application to Mr. Beauchamp tower’s experiments, including an experimental determination of the viscosity of olive oil
TL;DR: In this paper, the action of oils and other viscous fluids to diminish friction and wear between solid surfaces is treated as a subject for theoretical treatment, and the absence of such treatment has also been owing to the want of any general laws revealed by experiment.
A Full Numerical Solution to the Mixed Lubrication in Point Contacts full numerical solution for the mixed elastohydrodynamic lubrication (EHL) in point
Yuan-Zhong Hu,Dong Zhu +1 more
TL;DR: In this article, a new numerical approach that is simple and robust, capable of handling three-dimensional measured engineering rough surfaces moving at different rolling and sliding velocities is presented.
Journal ArticleDOI
A Full Numerical Solution to the Mixed Lubrication in Point Contacts
Yuan-Zhong Hu,Dong Zhu +1 more
TL;DR: In this paper, a full numerical solution for the mixed elastohydrodynamic lubrication (EHL) in point contacts is presented, using a new numerical approach that is simple and robust, capable of handling three-dimensional measured engineering rough surfaces moving at different rolling and sliding velocities.
Journal ArticleDOI
A simple theory of asperity contact in elastohydro-dynamic lubrication
TL;DR: In this article, the Greenwood and Williamson theory of random rough surfaces in contact has been combined with established elastohydrodynamic theory to provide a theoretical approach to highly loaded lubricated contacts in which the load is shared between hydrodynamic pressure and asperity contact.