Film Thickness and Traction in Soft EHL with Grease

Engineering plastic materials like polyamide and polyacetal are widely used for worm wheels and other tribological elements under EHL conditions with grease; typical examples are found in electrical power steering systems and power window mechanisms. Low elastic modulus of those materials makes thei...

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Autores principales:	Tsuyoshi Kochi, Ryosuke Ichimura, Michitaka Yoshihara, Daming Dong, Yoshitsugu Kimura
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2017
Materias:	soft ehl grease film thickness traction rheology Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/bf803a47db46402999ce429cac3db851
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id	oai:doaj.org-article:bf803a47db46402999ce429cac3db851
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spelling	oai:doaj.org-article:bf803a47db46402999ce429cac3db8512021-11-05T09:20:03ZFilm Thickness and Traction in Soft EHL with Grease1881-219810.2474/trol.12.171https://doaj.org/article/bf803a47db46402999ce429cac3db8512017-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/12/4/12_171/_pdf/-char/enhttps://doaj.org/toc/1881-2198Engineering plastic materials like polyamide and polyacetal are widely used for worm wheels and other tribological elements under EHL conditions with grease; typical examples are found in electrical power steering systems and power window mechanisms. Low elastic modulus of those materials makes their contact pressure much lower than steel-to-steel contact, and EHL of those contacts is called “soft EHL”. The current concern of this technology is higher reliability and lower friction losses, which mean maintaining sufficient EHL film thickness and reducing traction in tribological terms. The present work tries to measure soft EHL film thickness and traction of oil and grease by an optical interferometry EHL system, in which a steel ball was made contact with a transparent polycarbonate disk having a similar elasticity as the above-cited engineering plastic materials. The results show that prediction is possible by using the analyses by Dong and Qian for the film thickness and by Muraki and Kimura for the traction coefficient.Tsuyoshi KochiRyosuke IchimuraMichitaka YoshiharaDaming DongYoshitsugu KimuraJapanese Society of Tribologistsarticlesoft ehlgreasefilm thicknesstractionrheologyPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 12, Iss 4, Pp 171-176 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	soft ehl grease film thickness traction rheology Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	soft ehl grease film thickness traction rheology Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Tsuyoshi Kochi Ryosuke Ichimura Michitaka Yoshihara Daming Dong Yoshitsugu Kimura Film Thickness and Traction in Soft EHL with Grease
description	Engineering plastic materials like polyamide and polyacetal are widely used for worm wheels and other tribological elements under EHL conditions with grease; typical examples are found in electrical power steering systems and power window mechanisms. Low elastic modulus of those materials makes their contact pressure much lower than steel-to-steel contact, and EHL of those contacts is called “soft EHL”. The current concern of this technology is higher reliability and lower friction losses, which mean maintaining sufficient EHL film thickness and reducing traction in tribological terms. The present work tries to measure soft EHL film thickness and traction of oil and grease by an optical interferometry EHL system, in which a steel ball was made contact with a transparent polycarbonate disk having a similar elasticity as the above-cited engineering plastic materials. The results show that prediction is possible by using the analyses by Dong and Qian for the film thickness and by Muraki and Kimura for the traction coefficient.
format	article
author	Tsuyoshi Kochi Ryosuke Ichimura Michitaka Yoshihara Daming Dong Yoshitsugu Kimura
author_facet	Tsuyoshi Kochi Ryosuke Ichimura Michitaka Yoshihara Daming Dong Yoshitsugu Kimura
author_sort	Tsuyoshi Kochi
title	Film Thickness and Traction in Soft EHL with Grease
title_short	Film Thickness and Traction in Soft EHL with Grease
title_full	Film Thickness and Traction in Soft EHL with Grease
title_fullStr	Film Thickness and Traction in Soft EHL with Grease
title_full_unstemmed	Film Thickness and Traction in Soft EHL with Grease
title_sort	film thickness and traction in soft ehl with grease
publisher	Japanese Society of Tribologists
publishDate	2017
url	https://doaj.org/article/bf803a47db46402999ce429cac3db851
work_keys_str_mv	AT tsuyoshikochi filmthicknessandtractioninsoftehlwithgrease AT ryosukeichimura filmthicknessandtractioninsoftehlwithgrease AT michitakayoshihara filmthicknessandtractioninsoftehlwithgrease AT damingdong filmthicknessandtractioninsoftehlwithgrease AT yoshitsugukimura filmthicknessandtractioninsoftehlwithgrease
_version_	1718444433580490752

Film Thickness and Traction in Soft EHL with Grease

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