Publication detail
Effect of real longitudinal surface roughness on lubrication film formation within line elastohydrodynamic contact
SHEN, XJ. CHEN, XY. ŠPERKA, P. KŘUPKA, I. HARTL, M.
Czech title
Vliv reálných podélných povrchových nerovností na utváření mazacího filmu v liniovém elastohydrodynamickém kontaktu
English title
Effect of real longitudinal surface roughness on lubrication film formation within line elastohydrodynamic contact
Type
journal article - other
Language
en
Original abstract
The line contact formed between a steel tapered roller and glass disc is observed within an optical test rig and the effects of real surface roughness on lubrication film formation are studied. Experiments carried out under pure rolling conditions have shown that the depth is the key parameter that influences the effect on the film thickness. If the roughness features are shallow, the lubrication film shape within the contact follows the shape of the surface closely. However, the groove having only about 800 nm in depth divided the line contact into two parts that behave as two separate line contacts. Such an effect can increase the risk of the wear of rubbing surfaces as the lubrication film thickness between the real machine components can be significantly lower than expected.
Czech abstract
Článek shrnuje výsledky studia chování reálných povrchových nerovností v nekonformních liniových kontaktech provozovaných za podmínek elastohydrodynamického mazání. Kontakt mezi ocelovým kuželíkem a skleněným kotoučem je pozorován interferenčním mikroskopem a získané barevné interferogramy jsou vyhodnocovány pomocí kolorimetrické interferometrii. V článku je ukázán vlvi orientace povrchových nerovností na prolomení mazacího filmu.
English abstract
The line contact formed between a steel tapered roller and glass disc is observed within an optical test rig and the effects of real surface roughness on lubrication film formation are studied. Experiments carried out under pure rolling conditions have shown that the depth is the key parameter that influences the effect on the film thickness. If the roughness features are shallow, the lubrication film shape within the contact follows the shape of the surface closely. However, the groove having only about 800 nm in depth divided the line contact into two parts that behave as two separate line contacts. Such an effect can increase the risk of the wear of rubbing surfaces as the lubrication film thickness between the real machine components can be significantly lower than expected.
Keywords in Czech
elastohydrodynamické mazání; tloušťka mazacího filmu; drsné povrchy; liniový kontakt
Keywords in English
line contact; Film thickness; Elastohydrodynamic lubrication; Surface roughness
RIV year
2010
Released
31.08.2010
Publisher
Elsevier
Location
EU
ISSN
0301-679X
Journal
Tribology International
Volume
44
Number
3
Pages from–to
1–6
Pages count
6
BIBTEX
@article{BUT49898,
author="Ivan {Křupka} and Petr {Šperka} and Martin {Hartl},
title="Effect of real longitudinal surface roughness on lubrication film formation within line elastohydrodynamic contact",
journal="Tribology International",
year="2010",
volume="44",
number="3",
month="August",
pages="1--6",
publisher="Elsevier",
address="EU",
issn="0301-679X"
}