Detail publikace
Analytical Formula for the Ratio of Central to Minimum Film Thickness in a Circular EHL Contact
ŠPERKA, P. KŘUPKA, I. HARTL, M.
Anglický název
Analytical Formula for the Ratio of Central to Minimum Film Thickness in a Circular EHL Contact
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
Prediction of minimum film thickness is often used in practice for calculation of film parameter to design machine operation in full film regime. It was reported several times that majority of prediction formulas cannot match experimental data in terms of minimum film thickness. These standard prediction formulas give almost constant ratio between central and minimum film thickness while numerical calculations show ratio which spans from 1 to more than 3 depending on M and L parameters. In this paper, an analytical formula of this ratio is presented for lubricants with various pressure–viscosity coefficients. The analytical formula is compared with optical interferometry measurements and differences are discussed. It allows better prediction, compared to standard formulas, of minimum film thickness for wide range of M and L parameters.
Anglický abstrakt
Prediction of minimum film thickness is often used in practice for calculation of film parameter to design machine operation in full film regime. It was reported several times that majority of prediction formulas cannot match experimental data in terms of minimum film thickness. These standard prediction formulas give almost constant ratio between central and minimum film thickness while numerical calculations show ratio which spans from 1 to more than 3 depending on M and L parameters. In this paper, an analytical formula of this ratio is presented for lubricants with various pressure–viscosity coefficients. The analytical formula is compared with optical interferometry measurements and differences are discussed. It allows better prediction, compared to standard formulas, of minimum film thickness for wide range of M and L parameters.
Klíčová slova anglicky
point contact lubrication; minimum film thickness; prediction formula
Vydáno
07.09.2018
Nakladatel
MDPI
ISSN
2075-4442
Ročník
6
Číslo
3
Strany od–do
1–11
Počet stran
11
BIBTEX
@article{BUT150792,
author="Petr {Svoboda} and Petr {Šperka} and Ivan {Křupka} and Martin {Hartl},
title="Analytical Formula for the Ratio of Central to Minimum Film Thickness in a Circular EHL Contact",
year="2018",
volume="6",
number="3",
month="September",
pages="1--11",
publisher="MDPI",
issn="2075-4442"
}