Effect of Formulation of Li Greases on Their Flow and Ball Bearing Torque

This paper describes a study on the effect of base oil type and thickener type on bearing torques with Li type greases. Using a ball bearing tribometer equipped with a torque sensor, friction torque behaviors were determined for model Li greases with different hydrocarbon type base oils. The results...

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Autores principales:	Kazumi Sakai, Yasuha Tokumo, Yusuke Ayame, Yuji Shitara, Hiroyoshi Tanaka, Joichi Sugimura
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2016
Materias:	grease torque lubricants fluorescence ehl 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/041db8740ceb4694a8ce7a917a457a5b
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spelling	oai:doaj.org-article:041db8740ceb4694a8ce7a917a457a5b2021-11-05T09:21:40ZEffect of Formulation of Li Greases on Their Flow and Ball Bearing Torque1881-219810.2474/trol.11.168https://doaj.org/article/041db8740ceb4694a8ce7a917a457a5b2016-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/11/2/11_168/_pdf/-char/enhttps://doaj.org/toc/1881-2198This paper describes a study on the effect of base oil type and thickener type on bearing torques with Li type greases. Using a ball bearing tribometer equipped with a torque sensor, friction torque behaviors were determined for model Li greases with different hydrocarbon type base oils. The results showed that the bearing torque changed with the formulation of the greases. For the clarification of the mechanisms, rheological parameter and film thickness of greases were evaluated, and the fluorescence technique was introduced to observe flow behaviors of the greases in and around EHL contact area by using a ball-on-disk tribometer, furthermore, thickener fiber structure was observed by an electron microscope. The abundance of grease around EHL contact area was different depending on thickener types. It is suggested that film thickness, flow behaviors, and thickener structure influence simultaneously on the bearing torque behaviors.Kazumi SakaiYasuha TokumoYusuke AyameYuji ShitaraHiroyoshi TanakaJoichi SugimuraJapanese Society of TribologistsarticlegreasetorquelubricantsfluorescenceehlPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 11, Iss 2, Pp 168-173 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	grease torque lubricants fluorescence ehl Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	grease torque lubricants fluorescence ehl Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Kazumi Sakai Yasuha Tokumo Yusuke Ayame Yuji Shitara Hiroyoshi Tanaka Joichi Sugimura Effect of Formulation of Li Greases on Their Flow and Ball Bearing Torque
description	This paper describes a study on the effect of base oil type and thickener type on bearing torques with Li type greases. Using a ball bearing tribometer equipped with a torque sensor, friction torque behaviors were determined for model Li greases with different hydrocarbon type base oils. The results showed that the bearing torque changed with the formulation of the greases. For the clarification of the mechanisms, rheological parameter and film thickness of greases were evaluated, and the fluorescence technique was introduced to observe flow behaviors of the greases in and around EHL contact area by using a ball-on-disk tribometer, furthermore, thickener fiber structure was observed by an electron microscope. The abundance of grease around EHL contact area was different depending on thickener types. It is suggested that film thickness, flow behaviors, and thickener structure influence simultaneously on the bearing torque behaviors.
format	article
author	Kazumi Sakai Yasuha Tokumo Yusuke Ayame Yuji Shitara Hiroyoshi Tanaka Joichi Sugimura
author_facet	Kazumi Sakai Yasuha Tokumo Yusuke Ayame Yuji Shitara Hiroyoshi Tanaka Joichi Sugimura
author_sort	Kazumi Sakai
title	Effect of Formulation of Li Greases on Their Flow and Ball Bearing Torque
title_short	Effect of Formulation of Li Greases on Their Flow and Ball Bearing Torque
title_full	Effect of Formulation of Li Greases on Their Flow and Ball Bearing Torque
title_fullStr	Effect of Formulation of Li Greases on Their Flow and Ball Bearing Torque
title_full_unstemmed	Effect of Formulation of Li Greases on Their Flow and Ball Bearing Torque
title_sort	effect of formulation of li greases on their flow and ball bearing torque
publisher	Japanese Society of Tribologists
publishDate	2016
url	https://doaj.org/article/041db8740ceb4694a8ce7a917a457a5b
work_keys_str_mv	AT kazumisakai effectofformulationofligreasesontheirflowandballbearingtorque AT yasuhatokumo effectofformulationofligreasesontheirflowandballbearingtorque AT yusukeayame effectofformulationofligreasesontheirflowandballbearingtorque AT yujishitara effectofformulationofligreasesontheirflowandballbearingtorque AT hiroyoshitanaka effectofformulationofligreasesontheirflowandballbearingtorque AT joichisugimura effectofformulationofligreasesontheirflowandballbearingtorque
_version_	1718444389527715840

Effect of Formulation of Li Greases on Their Flow and Ball Bearing Torque

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