Publication detail
Study of grease behaviour in a starved Elastohydrodynamically lubricated contact
SVOBODA, P. KOŠŤÁL, D. KUŇÁK, J. KŘUPKA, I.
Czech title
Studium chování plastického maziva v hladovějícím elastohydrodynamicky mazaném kontaktu
English title
Study of grease behaviour in a starved Elastohydrodynamically lubricated contact
Type
journal article - other
Language
en
Original abstract
This paper is an experimental study of grease lubrication in a starved elastohydrodynamic lubricated (EHL) contact. Lubricating film thickness is measured with tribological experimental device ball-on-disc using optical interferometry and high speed camera. The lubricants used were commercial greases with a various kinematic viscosities, additives and thickeners formulated for low and high-speed applications. The experiment is aimed at a comparison of results acquired by ball-on-disc device and full scale axial bearing. In addition, this paper also investigates the influence of number of the rolling elements (overrolling time) on the resulting film thickness. Experiments confirm the presence of replenishment mechanism caused by relative motion of the surfaces, which generates base oil flow into the inlet of the contact.
Czech abstract
Experimentální studum plastických maziv v hladovějícím elastohydrodynamicky mazaném (EHD) kontaktu. Tloušťka mazacího filmu je měřena pomocí experimentálního tribometru ložiskového kontaktu s využitím optické interferometrie a vysokorychlostní kamery. Experiment je zaměřen na studium vlivu počtu valivých elementů a porovnání výsledků získaných na jednokontaktním tribometru a na modelu reálného ložiska.
English abstract
This paper is an experimental study of grease lubrication in a starved elastohydrodynamic lubricated (EHL) contact. Lubricating film thickness is measured with tribological experimental device ball-on-disc using optical interferometry and high speed camera. The lubricants used were commercial greases with a various kinematic viscosities, additives and thickeners formulated for low and high-speed applications. The experiment is aimed at a comparison of results acquired by ball-on-disc device and full scale axial bearing. In addition, this paper also investigates the influence of number of the rolling elements (overrolling time) on the resulting film thickness. Experiments confirm the presence of replenishment mechanism caused by relative motion of the surfaces, which generates base oil flow into the inlet of the contact.
Keywords in Czech
grease, starvation, EHD, lubrication
Keywords in English
grease, starvation, EHD, lubrication
RIV year
2014
Released
12.06.2014
Publisher
MM Science Journal
Location
Praha
ISSN
1805-0476
Volume
2014
Number
June
Pages from–to
464–469
Pages count
6
BIBTEX
@article{BUT107874,
author="Petr {Svoboda} and David {Košťál} and Jiří {Kuňák} and Ivan {Křupka},
title="Study of grease behaviour in a starved Elastohydrodynamically lubricated contact",
year="2014",
volume="2014",
number="June",
month="June",
pages="464--469",
publisher="MM Science Journal",
address="Praha",
issn="1805-0476"
}