Publication detail

Replenishment Differences in EHL Contact Lubricated by New andIn-bearings-aged Grease

NAVRÁTIL, M. KOŠŤÁL, D. KŘUPKA, I. HARTL, M.

English title

Replenishment Differences in EHL Contact Lubricated by New andIn-bearings-aged Grease

Type

journal article in Scopus

Language

en

Original abstract

Contact replenishment differences between new and aged grease are studied using ball-on-disc optical fluorescence. Threedifferent greases were aged in rolling bearings for 30 –50 % of their predicted life. A considerable effort is focused on fluorescence calibration, so that differences in lubricant volume can be quantified. No changes in replenishment between new and aged samples were found in one grease. The other two greaseswere contaminated by metal particles and iron oxide powder. Grease fluorescence was quenched by contaminants and linear relation between intensity values and film thickness did not apply for samples with heaviest contamination. Nevertheless, strong link between the degree of contamination and lubricant replenishment was found.

English abstract

Contact replenishment differences between new and aged grease are studied using ball-on-disc optical fluorescence. Threedifferent greases were aged in rolling bearings for 30 –50 % of their predicted life. A considerable effort is focused on fluorescence calibration, so that differences in lubricant volume can be quantified. No changes in replenishment between new and aged samples were found in one grease. The other two greaseswere contaminated by metal particles and iron oxide powder. Grease fluorescence was quenched by contaminants and linear relation between intensity values and film thickness did not apply for samples with heaviest contamination. Nevertheless, strong link between the degree of contamination and lubricant replenishment was found.

Keywords in English

Grease lubrication; Replenishment; Contamination; Fluorescence

Released

17.03.2020

Publisher

Faculty of Engineering, University of Kragujevac

ISSN

0354-8996

Volume

42

Number

1

Pages from–to

102–114

Pages count

14

BIBTEX


@article{BUT162599,
  author="Marek {Navrátil} and David {Košťál} and Ivan {Křupka} and Martin {Hartl},
  title="Replenishment Differences in EHL Contact Lubricated by New andIn-bearings-aged Grease",
  year="2020",
  volume="42",
  number="1",
  month="March",
  pages="102--114",
  publisher="Faculty of Engineering, University of Kragujevac",
  issn="0354-8996"
}