Detail publikačního výsledku

Effects of lateral harmonic vibrations on film thickness in EHL point contacts

FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Originální název

Effects of lateral harmonic vibrations on film thickness in EHL point contacts

Anglický název

Effects of lateral harmonic vibrations on film thickness in EHL point contacts

Druh

Článek WoS

Originální abstrakt

Vibrations are an integral part of machine operation and affect every elastohydrodynamically lubricated conjunctions. In the present experimental study, a rolling contact is subjected to lateral-sliding vibrations with short stroke length. Film thickness behaviour is investigated under diverse conditions including rolling speeds, stroke lengths, frequencies, loads, and variety of lubricants. The results obtained under vibrations are compared with the results for corresponding steady state conditions to determine the effects of vibrations. It is shown that the lubricant rheology and the ratio of main and lateral entrainment speed are crucial parameters where the influence of this ratio on relative film thickness and its deviations can be estimated by exponential functions uniformly for all lubricants. The thresholds for film failures were found.

Anglický abstrakt

Vibrations are an integral part of machine operation and affect every elastohydrodynamically lubricated conjunctions. In the present experimental study, a rolling contact is subjected to lateral-sliding vibrations with short stroke length. Film thickness behaviour is investigated under diverse conditions including rolling speeds, stroke lengths, frequencies, loads, and variety of lubricants. The results obtained under vibrations are compared with the results for corresponding steady state conditions to determine the effects of vibrations. It is shown that the lubricant rheology and the ratio of main and lateral entrainment speed are crucial parameters where the influence of this ratio on relative film thickness and its deviations can be estimated by exponential functions uniformly for all lubricants. The thresholds for film failures were found.

Klíčová slova

Elastohydrodynamic lubrication; non-steady state film thickness; micro-oscillations; lubricants

Klíčová slova v angličtině

Elastohydrodynamic lubrication; non-steady state film thickness; micro-oscillations; lubricants

Autoři

FRÝZA, J.; ŠPERKA, P.; KŘUPKA, I.; HARTL, M.

Rok RIV

2019

Vydáno

01.01.2018

Nakladatel

Elsevier

Místo

United Kingdom

ISSN

0301-679X

Periodikum

Tribology International

Svazek

117

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

236

Strany do

249

Strany počet

14

URL

http://www.sciencedirect.com/science/article/pii/S0301679X17304103

BibTex

@article{BUT140070,
  author="Josef {Frýza} and Petr {Šperka} and Ivan {Křupka} and Martin {Hartl}",
  title="Effects of lateral harmonic vibrations on film thickness in EHL point contacts",
  journal="Tribology International",
  year="2018",
  volume="117",
  number="1",
  pages="236--249",
  doi="10.1016/j.triboint.2017.08.022",
  issn="0301-679X",
  url="http://www.sciencedirect.com/science/article/pii/S0301679X17304103"
}