Detail publikace
Vliv cílené modifikace povrchu na EHD film
KŘUPKA, I. HARTL, M.
Český název
Vliv cílené modifikace povrchu na EHD film
Anglický název
The effect of surface texturing on thin EHD lubrication films
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
Surface texturing has been successfully used for conformal contacts in many tribological applications in an effort to diminish friction and wear. However, the use of such a surface modifications are still in nascent as far as highly loaded contacts between non-conformal surfaces are concerned. It is mainly caused by the fact that the presence of such micro-features within these contacts can significantly influence the pressure distribution within the contact. Nevertheless, it has been shown in recent studies that the surface texturing can also have beneficial tribological effects if the depth of micro-features is properly designed. This paper is devoted to the experimental study of the effect of the micro-dents of various depths on thin lubrication films to find an experimental evidence of the micro-feature depth threshold for surface texturing applications in highly loaded non-conformal surfaces. The behaviour of an array of micro-dents within thin EHD contacts has been studied by thin film colorimetric interferometry. The influence of surface texturing on lubricant film formation has been observed under sliding/rolling conditions. The significant effect of micro-dents depth on lubricant film thickness is observed for positive slide-to-roll ratio when the disc is moving faster than the micro-textured ball. The presence of deep micro-dents within lubricated contact results in film thickness reduction downstream. As the depth of micro-dents is reduced, this effect diminishes and beneficial effect of micro-dents on film thickness formation has been observed. No significant influence of micro-dents depth on lubricant film shape has been observed in case of negative slide-to-roll conditions when micro-dents do not cause film thickness reduction regardless of their depths.
Český abstrakt
Článek přínáší původní výsledky studia vlivu cílené topografie třecích povrchů na utváření mazacích filmů. Výsledky jsou prezentovány ve formě porovnání tloušťky mazaného kontaktu u modifikovaného a hladkého povrchu.
Anglický abstrakt
Surface texturing has been successfully used for conformal contacts in many tribological applications in an effort to diminish friction and wear. However, the use of such a surface modifications are still in nascent as far as highly loaded contacts between non-conformal surfaces are concerned. It is mainly caused by the fact that the presence of such micro-features within these contacts can significantly influence the pressure distribution within the contact. Nevertheless, it has been shown in recent studies that the surface texturing can also have beneficial tribological effects if the depth of micro-features is properly designed. This paper is devoted to the experimental study of the effect of the micro-dents of various depths on thin lubrication films to find an experimental evidence of the micro-feature depth threshold for surface texturing applications in highly loaded non-conformal surfaces. The behaviour of an array of micro-dents within thin EHD contacts has been studied by thin film colorimetric interferometry. The influence of surface texturing on lubricant film formation has been observed under sliding/rolling conditions. The significant effect of micro-dents depth on lubricant film thickness is observed for positive slide-to-roll ratio when the disc is moving faster than the micro-textured ball. The presence of deep micro-dents within lubricated contact results in film thickness reduction downstream. As the depth of micro-dents is reduced, this effect diminishes and beneficial effect of micro-dents on film thickness formation has been observed. No significant influence of micro-dents depth on lubricant film shape has been observed in case of negative slide-to-roll conditions when micro-dents do not cause film thickness reduction regardless of their depths.
Klíčová slova česky
Elastohydrodynamické mazání; Tloušťka filmu; Kolorimetrická interferometrie; Cílená modifikace topografie
Klíčová slova anglicky
Elastohydrodynamic lubrication; Film thickness; Micro-dents; Thin film colorimetric interferometry; Surface texturing
Rok RIV
2007
Vydáno
01.07.2007
Nakladatel
Elsevier
Místo
Velká Británie
ISSN
0301-679X
Časopis
Tribology International
Ročník
40
Číslo
7
Strany od–do
1100–1110
Počet stran
11
BIBTEX
@article{BUT43776,
author="Ivan {Křupka} and Martin {Hartl},
title="The effect of surface texturing on thin EHD lubrication films",
journal="Tribology International",
year="2007",
volume="40",
number="7",
month="July",
pages="1100--1110",
publisher="Elsevier",
address="Velká Británie",
issn="0301-679X"
}