Detail publikace

Vliv cílené modifikace topografie na elastohydrodynamicky mazaný kontakt za neustálených provozních podmínek

KŘUPKA, I. HARTL, M. ZIMMERMAN, M. HOUŠKA, P. JANG,S.

Český název

Vliv cílené modifikace topografie na elastohydrodynamicky mazaný kontakt za neustálených provozních podmínek

Anglický název

Effect of surface texturing on elastohydrodynamically lubricated contact under transient speed conditions

Typ

článek v časopise - ostatní, Jost

Jazyk

en

Originální abstrakt

Effect of surface topography modifications on lubrication film thickness within non-conformal lubricated contact operated under transient speed conditions is observed. Optical test rig is used to observe the lubricant film behaviour between the flat surface of a chromium coated glass disc and a steel ball under simplified operational conditions modelling the cam and tappet contact. Numerical simulation was used to be able to choose the operating conditions suitable for experiments. An array of micro-dents was produced on the ball surface to be able to demonstrate the effect of surface topography on lubrication film formation. Experiments were carried out under elastohydrodynamic lubrication conditions. Obtained results have shown that surface texturing could represent the way how to increase lubrication efficiency of rolling/sliding non-conformal contacts under transient operational conditions through the lubricant emitted from micro-dents. It was found that the lubricant emitted from the micro-dents helps to separate rubbing surfaces especially under thin film lubrication conditions where the rubbing surfaces moves in the opposite direction.

Český abstrakt

Článek shrnuje výsledky studia elastohydrodynamicky mazaných bodových kontaktů za neustálených provozních podmínek. Tlošťka mazacího filmu je studována v závislosti na rychlostech třecích povrchů, které simulují chování vačky a zdvihátka. Získané výsledky jsou porovnány s numerickým řešením a je ukázán vliv cílené modifikace topografie na utváření mazacího filmu v kritických fázích provozních podmínek.

Anglický abstrakt

Effect of surface topography modifications on lubrication film thickness within non-conformal lubricated contact operated under transient speed conditions is observed. Optical test rig is used to observe the lubricant film behaviour between the flat surface of a chromium coated glass disc and a steel ball under simplified operational conditions modelling the cam and tappet contact. Numerical simulation was used to be able to choose the operating conditions suitable for experiments. An array of micro-dents was produced on the ball surface to be able to demonstrate the effect of surface topography on lubrication film formation. Experiments were carried out under elastohydrodynamic lubrication conditions. Obtained results have shown that surface texturing could represent the way how to increase lubrication efficiency of rolling/sliding non-conformal contacts under transient operational conditions through the lubricant emitted from micro-dents. It was found that the lubricant emitted from the micro-dents helps to separate rubbing surfaces especially under thin film lubrication conditions where the rubbing surfaces moves in the opposite direction.

Klíčová slova česky

Elastohydrodynamické mazání; Tloušťka filmu; Cílená modifikace topografie; Neustálené provozní podmínky

Klíčová slova anglicky

Elastohydrodynamic; Film thickness; Surface texturing; Transient speed conditions

Rok RIV

2011

Vydáno

13.05.2011

Nakladatel

Elsevier

Místo

Nizozemí

ISSN

0301-679X

Ročník

44

Číslo

10

Strany od–do

1144–1150

Počet stran

7

BIBTEX


@article{BUT74978,
  author="Ivan {Křupka} and Martin {Hartl} and Martin {Zimmerman} and Pavel {Houška},
  title="Effect of surface texturing on elastohydrodynamically lubricated contact under transient speed conditions",
  year="2011",
  volume="44",
  number="10",
  month="May",
  pages="1144--1150",
  publisher="Elsevier",
  address="Nizozemí",
  issn="0301-679X"
}