Detail publikace
Vliv modifikace topografie na nekonformní kontakty za podmínek smíšeného mazání
KŘUPKA, I. HARTL, M. VRBKA, M.
Český název
Vliv modifikace topografie na nekonformní kontakty za podmínek smíšeného mazání
Anglický název
Effect of surface texturing on mixed lubricated non-conformal contacts
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
The behaviour of surface texturing based on shallow micro-dents was observed within mixed lubricated non-conformal contacts and compared with results obtained under thin film elastohydrodynamic conditions. Thin film colorimetric interferometry was used to observe the changes in lubrication film thickness. It was found that lubricant emitted by micro-dents could effectively lift off the real roughness features that provided an increase in average but also the local minimum film thicknesses. On the contrary to smooth contact conditions no film thickness reduction is obvious either downstream or upstream the micro-dent. The possible beneficial effect of surface texturing on mixed lubricated contact was checked through the qualitative wear test. It confirmed that an array of shallow micro-dents reduced asperity interactions of rubbing surfaces. Moreover, the effect of micro-dents on rolling contact fatigue was also considered in this study. It has been shown that individual dents would have to be much deeper compared to those used in surface texturing experiments to cause reduction in contact fatigue life. It can be suggested from the obtained results that property designed surface texturing could help to increase the separation of rubbing surfaces under mixed lubrication conditions.
Český abstrakt
Článek se věnuje vlivu topografie třecích povrchů u velmi zatěžovaných kontaktů strojních částí provozovaných za podmínek smíšeného mazání
Anglický abstrakt
The behaviour of surface texturing based on shallow micro-dents was observed within mixed lubricated non-conformal contacts and compared with results obtained under thin film elastohydrodynamic conditions. Thin film colorimetric interferometry was used to observe the changes in lubrication film thickness. It was found that lubricant emitted by micro-dents could effectively lift off the real roughness features that provided an increase in average but also the local minimum film thicknesses. On the contrary to smooth contact conditions no film thickness reduction is obvious either downstream or upstream the micro-dent. The possible beneficial effect of surface texturing on mixed lubricated contact was checked through the qualitative wear test. It confirmed that an array of shallow micro-dents reduced asperity interactions of rubbing surfaces. Moreover, the effect of micro-dents on rolling contact fatigue was also considered in this study. It has been shown that individual dents would have to be much deeper compared to those used in surface texturing experiments to cause reduction in contact fatigue life. It can be suggested from the obtained results that property designed surface texturing could help to increase the separation of rubbing surfaces under mixed lubrication conditions.
Klíčová slova česky
smíšené mazání; tloušťka mazacího filmu; modifikace topografie
Klíčová slova anglicky
mixed lubrication; film thickness; surface texturing
Rok RIV
2008
Vydáno
13.11.2008
Nakladatel
Elsevier
Místo
EU
ISSN
0301-679X
Časopis
Tribology International
Ročník
41
Číslo
11
Strany od–do
1063–1073
Počet stran
11
BIBTEX
@article{BUT46857,
author="Ivan {Křupka} and Martin {Hartl} and Martin {Vrbka},
title="Effect of surface texturing on mixed lubricated non-conformal contacts",
journal="Tribology International",
year="2008",
volume="41",
number="11",
month="November",
pages="1063--1073",
publisher="Elsevier",
address="EU",
issn="0301-679X"
}