Detail publikace
Vliv modifikace topografie na velmi tenký mazací film
KŘUPKA, I. HARTL, M.
Český název
Vliv modifikace topografie na velmi tenký mazací film
Anglický název
Effect of Surface Texturing on Very Thin Film EHD Lubricated Contacts
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
Micro-dents of various depths and shapes have been produced on rubbing surfaces to find out whether there could be some operational conditions suitable for surface texturing applications in highly loaded non-conformal contacts. The significant effect of the size and shape of the micro-dents has been observed as a function of the slide-to-roll ratio. Shallow micro-features within concentrated contact were found to increase the film thickness by supplying more lubricant to the contact under rolling/sliding conditions. However, in many cases this effect was accompanied with local film thickness reduction that even caused lubrication film breakdown under thin film lubrication conditions. Longitudinally and transversely oriented short grooves were found not to be completely suitable for the surface texturing applications from this point of view. Conversely, small circular micro-dents seem to be more promising as to their use to help to separate rubbing surfaces when a micro-textured surface is moving faster than a non-textured one and the lubrication films become very thin. Nevertheless, it would require a well-balanced design, taking into account many factors as the lubrication regime, the slide-to-roll ratio conditions, the rolling contact fatigue, the technology of surface texturing patterns creation, etc.
Český abstrakt
Článek je věnován vlivu modifikace topografie na velmi tenký mazací film.
Anglický abstrakt
Micro-dents of various depths and shapes have been produced on rubbing surfaces to find out whether there could be some operational conditions suitable for surface texturing applications in highly loaded non-conformal contacts. The significant effect of the size and shape of the micro-dents has been observed as a function of the slide-to-roll ratio. Shallow micro-features within concentrated contact were found to increase the film thickness by supplying more lubricant to the contact under rolling/sliding conditions. However, in many cases this effect was accompanied with local film thickness reduction that even caused lubrication film breakdown under thin film lubrication conditions. Longitudinally and transversely oriented short grooves were found not to be completely suitable for the surface texturing applications from this point of view. Conversely, small circular micro-dents seem to be more promising as to their use to help to separate rubbing surfaces when a micro-textured surface is moving faster than a non-textured one and the lubrication films become very thin. Nevertheless, it would require a well-balanced design, taking into account many factors as the lubrication regime, the slide-to-roll ratio conditions, the rolling contact fatigue, the technology of surface texturing patterns creation, etc.
Klíčová slova česky
Modifikace topografie; Elastohydrodynamické mazání; Tloušťka
Klíčová slova anglicky
Elastohydrodynamic Lubrication; Film Thickness; Surface Texturing
Rok RIV
2009
Vydáno
21.01.2009
Nakladatel
Taylor Francis
Místo
Londýn
ISSN
1040-2004
Časopis
TRIBOLOGY TRANSACTIONS
Ročník
52
Číslo
1
Strany od–do
21–28
Počet stran
8
BIBTEX
@article{BUT47938,
author="Ivan {Křupka} and Martin {Hartl},
title="Effect of Surface Texturing on Very Thin Film EHD Lubricated Contacts",
journal="TRIBOLOGY TRANSACTIONS",
year="2009",
volume="52",
number="1",
month="January",
pages="21--28",
publisher="Taylor Francis",
address="Londýn",
issn="1040-2004"
}