Observation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology

The grease fluidity and migration inside a ball bearing has been visualized non-destructively by using a neutron imaging technology. It has been clarified that a lithium (Li) complex grease with lower torque lubricates in the channeling state and that a single Li soap grease with higher torque lubri...

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Autores principales:	Kazumi Sakai, Yusuke Ayame, Yoshimu Iwanami, Nobuharu Kimura, Yoshihiro Matsumoto
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2021
Materias:	grease neutron imaging bearing channeling churning lubrication 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/a3de0621c43241f9b49c063a1dd5561a
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spelling	oai:doaj.org-article:a3de0621c43241f9b49c063a1dd5561a2021-11-05T09:31:04ZObservation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology1881-219810.2474/trol.16.146https://doaj.org/article/a3de0621c43241f9b49c063a1dd5561a2021-06-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/16/2/16_146/_pdf/-char/enhttps://doaj.org/toc/1881-2198The grease fluidity and migration inside a ball bearing has been visualized non-destructively by using a neutron imaging technology. It has been clarified that a lithium (Li) complex grease with lower torque lubricates in the channeling state and that a single Li soap grease with higher torque lubricates in the churning state. Adhesion of the Li complex grease to bearing balls was quite limited, and most of the grease stayed on cage surfaces between the balls; adhesion of the single Li soap grease to bearing balls was remarkable. These observation results correlate to their grease performances for the bearing torque. The less adhesion of the Li complex grease to bearing balls contributes to reducing bearing torque due to easy rotations of bearing balls. In contrast, the remarkable adhesion of the single Li soap grease causes higher shear resistance for bearing ball rotations. The neutron imaging technology clarified the mechanism of the bearing torque difference depending on the grease types and could contribute to developments of energy-saving greases.Kazumi SakaiYusuke AyameYoshimu IwanamiNobuharu KimuraYoshihiro MatsumotoJapanese Society of Tribologistsarticlegreaseneutron imagingbearingchannelingchurninglubricationPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 16, Iss 2, Pp 146-150 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	grease neutron imaging bearing channeling churning lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	grease neutron imaging bearing channeling churning lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Kazumi Sakai Yusuke Ayame Yoshimu Iwanami Nobuharu Kimura Yoshihiro Matsumoto Observation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology
description	The grease fluidity and migration inside a ball bearing has been visualized non-destructively by using a neutron imaging technology. It has been clarified that a lithium (Li) complex grease with lower torque lubricates in the channeling state and that a single Li soap grease with higher torque lubricates in the churning state. Adhesion of the Li complex grease to bearing balls was quite limited, and most of the grease stayed on cage surfaces between the balls; adhesion of the single Li soap grease to bearing balls was remarkable. These observation results correlate to their grease performances for the bearing torque. The less adhesion of the Li complex grease to bearing balls contributes to reducing bearing torque due to easy rotations of bearing balls. In contrast, the remarkable adhesion of the single Li soap grease causes higher shear resistance for bearing ball rotations. The neutron imaging technology clarified the mechanism of the bearing torque difference depending on the grease types and could contribute to developments of energy-saving greases.
format	article
author	Kazumi Sakai Yusuke Ayame Yoshimu Iwanami Nobuharu Kimura Yoshihiro Matsumoto
author_facet	Kazumi Sakai Yusuke Ayame Yoshimu Iwanami Nobuharu Kimura Yoshihiro Matsumoto
author_sort	Kazumi Sakai
title	Observation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology
title_short	Observation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology
title_full	Observation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology
title_fullStr	Observation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology
title_full_unstemmed	Observation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology
title_sort	observation of grease fluidity in a ball bearing using neutron imaging technology
publisher	Japanese Society of Tribologists
publishDate	2021
url	https://doaj.org/article/a3de0621c43241f9b49c063a1dd5561a
work_keys_str_mv	AT kazumisakai observationofgreasefluidityinaballbearingusingneutronimagingtechnology AT yusukeayame observationofgreasefluidityinaballbearingusingneutronimagingtechnology AT yoshimuiwanami observationofgreasefluidityinaballbearingusingneutronimagingtechnology AT nobuharukimura observationofgreasefluidityinaballbearingusingneutronimagingtechnology AT yoshihiromatsumoto observationofgreasefluidityinaballbearingusingneutronimagingtechnology
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Observation of Grease Fluidity in a Ball Bearing Using Neutron Imaging Technology

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