Publication result detail

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

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

Original Title

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

English Title

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

Type

WoS Article

Original Abstract

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.

English abstract

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.

Keywords

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

Key words in English

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

Authors

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

RIV year

2019

Released

01.01.2018

Publisher

Elsevier

Location

United Kingdom

ISBN

0301-679X

Periodical

Tribology International

Volume

117

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

236

Pages to

249

Pages count

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"
}