Study on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils

To meet with the latest environmental regulation, as environmentally acceptable lubricant (EAL) in marine field, biodegradable oils based on synthetic ester oils, have been applied to stern tube bearings of many new building vessels since the end of 2013, when the US EPA&lowast; effectuated the...

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Autores principales:	Akihiko Yano, Eiichi Iwawaki, Masaki Mihara, Sadao Yoshihara
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2015
Materias:	synthetic ester ester oil stern tube bearing stribeck curve sommerfeld number viscosity-pressure coefficient shear viscosity viscosity index improver 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/b146af9287684b5b8f5f486680572511
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spelling	oai:doaj.org-article:b146af9287684b5b8f5f4866805725112021-11-05T09:22:14ZStudy on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils1881-219810.2474/trol.10.377https://doaj.org/article/b146af9287684b5b8f5f4866805725112015-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/10/5/10_377/_pdf/-char/enhttps://doaj.org/toc/1881-2198To meet with the latest environmental regulation, as environmentally acceptable lubricant (EAL) in marine field, biodegradable oils based on synthetic ester oils, have been applied to stern tube bearings of many new building vessels since the end of 2013, when the US EPA&lowast; effectuated the 2013 VGP&lowast;&lowast; regulation. These synthetic ester oils are of the same viscosity grade, ISO VG100, as commonly used mineral oil. However, up to now, there has been no report on verification of tribological characteristics to use them for stern tube bearings, including the 2013 VGP regulation. Therefore, physical properties of them were measured in tribological aspects, and load carrying capacities while mooring trial condition were clarified by the tests using 100 mm inner diameter plain bearing, comparing to mineral oil. As the result, the following are derived. 1) There are three major differences in viscosity characteristics of synthetic ester oils depending on temperature, shear stability and pressure, which gives them lower load carrying capacity. 2) Sliding velocities at friction rising points of synthetic ester oils in Stribeck curve are larger than the one of mineral oil by the effects above, which also indicates lower load carrying capacity of them.&lowast;)EPA: Environmental Protection Agency&lowast;&lowast;)VGP: Vessel General PermitAkihiko YanoEiichi IwawakiMasaki MiharaSadao YoshiharaJapanese Society of Tribologistsarticlesynthetic esterester oilstern tube bearing stribeck curvesommerfeld numberviscosity-pressure coefficientshear viscosityviscosity index improverPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 10, Iss 5, Pp 377-389 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	synthetic ester ester oil stern tube bearing stribeck curve sommerfeld number viscosity-pressure coefficient shear viscosity viscosity index improver Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	synthetic ester ester oil stern tube bearing stribeck curve sommerfeld number viscosity-pressure coefficient shear viscosity viscosity index improver Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Akihiko Yano Eiichi Iwawaki Masaki Mihara Sadao Yoshihara Study on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils
description	To meet with the latest environmental regulation, as environmentally acceptable lubricant (EAL) in marine field, biodegradable oils based on synthetic ester oils, have been applied to stern tube bearings of many new building vessels since the end of 2013, when the US EPA&lowast; effectuated the 2013 VGP&lowast;&lowast; regulation. These synthetic ester oils are of the same viscosity grade, ISO VG100, as commonly used mineral oil. However, up to now, there has been no report on verification of tribological characteristics to use them for stern tube bearings, including the 2013 VGP regulation. Therefore, physical properties of them were measured in tribological aspects, and load carrying capacities while mooring trial condition were clarified by the tests using 100 mm inner diameter plain bearing, comparing to mineral oil. As the result, the following are derived. 1) There are three major differences in viscosity characteristics of synthetic ester oils depending on temperature, shear stability and pressure, which gives them lower load carrying capacity. 2) Sliding velocities at friction rising points of synthetic ester oils in Stribeck curve are larger than the one of mineral oil by the effects above, which also indicates lower load carrying capacity of them.&lowast;)EPA: Environmental Protection Agency&lowast;&lowast;)VGP: Vessel General Permit
format	article
author	Akihiko Yano Eiichi Iwawaki Masaki Mihara Sadao Yoshihara
author_facet	Akihiko Yano Eiichi Iwawaki Masaki Mihara Sadao Yoshihara
author_sort	Akihiko Yano
title	Study on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils
title_short	Study on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils
title_full	Study on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils
title_fullStr	Study on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils
title_full_unstemmed	Study on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils
title_sort	study on the load carrying capacity of sliding bearing lubricated by synthetic ester oils
publisher	Japanese Society of Tribologists
publishDate	2015
url	https://doaj.org/article/b146af9287684b5b8f5f486680572511
work_keys_str_mv	AT akihikoyano studyontheloadcarryingcapacityofslidingbearinglubricatedbysyntheticesteroils AT eiichiiwawaki studyontheloadcarryingcapacityofslidingbearinglubricatedbysyntheticesteroils AT masakimihara studyontheloadcarryingcapacityofslidingbearinglubricatedbysyntheticesteroils AT sadaoyoshihara studyontheloadcarryingcapacityofslidingbearinglubricatedbysyntheticesteroils
_version_	1718444431271526400

Study on the Load Carrying Capacity of Sliding Bearing Lubricated by Synthetic Ester Oils

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