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"
}