Experimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System

This paper presents the tribometric characteristics analysis of a journal bearing system lubricated with ferrofluid (FF) considering different shaft materials. Two magnetically permeable materials namely, EN-19 and mild steel were used to manufacture the journal. These journals were made magnetic by...

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Autores principales:	Nimeshchandra S. Patel, G. M. Deheri, H. C. Patel, K. R. Shah, Atindra Shukla
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2020
Materias:	ferrofluid journal bearing film pressure and temperature friction and wear 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/f3208bbb67b44743bf9890443fd3a39a
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id	oai:doaj.org-article:f3208bbb67b44743bf9890443fd3a39a
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spelling	oai:doaj.org-article:f3208bbb67b44743bf9890443fd3a39a2021-11-05T09:08:00ZExperimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System1881-219810.2474/trol.15.209https://doaj.org/article/f3208bbb67b44743bf9890443fd3a39a2020-07-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/15/4/15_209/_pdf/-char/enhttps://doaj.org/toc/1881-2198This paper presents the tribometric characteristics analysis of a journal bearing system lubricated with ferrofluid (FF) considering different shaft materials. Two magnetically permeable materials namely, EN-19 and mild steel were used to manufacture the journal. These journals were made magnetic by inserting neodymium magnet inside. It was seen that the magnetic shaft made from EN-19 offered a better dimensional accuracy in comparison with the magnetic shaft made from mild steel. Thus, magnetic shaft made from EN-19 was used in a brass bearing to evaluate various tribometric characteristics namely, fluid film pressure, fluid temperature rise, bearing vibrations, friction torque and wear at various conditions. The experimental results showed that the maximum pressure enhanced up to 84% in the case of FF based bearing system in comparison with conventional lubricant based system. Also, the film pressure was measured for newly acquired FF and the three years old FF to check the stability of the FF. It was found that almost no change in the pressure profile was observed. Further, the temperature rise was found to be less in FF based system while marginal difference in damping characteristic was observed. Moreover, tribometric characteristics such as friction and wear were also investigated and compared between FF based and oil based bearing system. A significant drop in friction torque was found in the case of FF based system. In addition, the wear loss due to the machine starts and stops was measured in lubricated condition for several systems using weight loss and stylus method. However, wear loss was found to be marginally increased in the FF based system, in comparison with the low viscous conventional fluid based system. It has been clearly established that the FF based system presented here, may turn out to be a better option from efficiency and stable system point of view.Nimeshchandra S. PatelG. M. DeheriH. C. PatelK. R. ShahAtindra ShuklaJapanese Society of Tribologistsarticleferrofluidjournal bearingfilm pressure and temperaturefriction and wearPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 15, Iss 4, Pp 209-221 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	ferrofluid journal bearing film pressure and temperature friction and wear Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	ferrofluid journal bearing film pressure and temperature friction and wear Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Nimeshchandra S. Patel G. M. Deheri H. C. Patel K. R. Shah Atindra Shukla Experimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System
description	This paper presents the tribometric characteristics analysis of a journal bearing system lubricated with ferrofluid (FF) considering different shaft materials. Two magnetically permeable materials namely, EN-19 and mild steel were used to manufacture the journal. These journals were made magnetic by inserting neodymium magnet inside. It was seen that the magnetic shaft made from EN-19 offered a better dimensional accuracy in comparison with the magnetic shaft made from mild steel. Thus, magnetic shaft made from EN-19 was used in a brass bearing to evaluate various tribometric characteristics namely, fluid film pressure, fluid temperature rise, bearing vibrations, friction torque and wear at various conditions. The experimental results showed that the maximum pressure enhanced up to 84% in the case of FF based bearing system in comparison with conventional lubricant based system. Also, the film pressure was measured for newly acquired FF and the three years old FF to check the stability of the FF. It was found that almost no change in the pressure profile was observed. Further, the temperature rise was found to be less in FF based system while marginal difference in damping characteristic was observed. Moreover, tribometric characteristics such as friction and wear were also investigated and compared between FF based and oil based bearing system. A significant drop in friction torque was found in the case of FF based system. In addition, the wear loss due to the machine starts and stops was measured in lubricated condition for several systems using weight loss and stylus method. However, wear loss was found to be marginally increased in the FF based system, in comparison with the low viscous conventional fluid based system. It has been clearly established that the FF based system presented here, may turn out to be a better option from efficiency and stable system point of view.
format	article
author	Nimeshchandra S. Patel G. M. Deheri H. C. Patel K. R. Shah Atindra Shukla
author_facet	Nimeshchandra S. Patel G. M. Deheri H. C. Patel K. R. Shah Atindra Shukla
author_sort	Nimeshchandra S. Patel
title	Experimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System
title_short	Experimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System
title_full	Experimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System
title_fullStr	Experimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System
title_full_unstemmed	Experimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System
title_sort	experimental tribometric characteristics analysis of a ferrofluid based journal bearing system
publisher	Japanese Society of Tribologists
publishDate	2020
url	https://doaj.org/article/f3208bbb67b44743bf9890443fd3a39a
work_keys_str_mv	AT nimeshchandraspatel experimentaltribometriccharacteristicsanalysisofaferrofluidbasedjournalbearingsystem AT gmdeheri experimentaltribometriccharacteristicsanalysisofaferrofluidbasedjournalbearingsystem AT hcpatel experimentaltribometriccharacteristicsanalysisofaferrofluidbasedjournalbearingsystem AT krshah experimentaltribometriccharacteristicsanalysisofaferrofluidbasedjournalbearingsystem AT atindrashukla experimentaltribometriccharacteristicsanalysisofaferrofluidbasedjournalbearingsystem
_version_	1718444444327346176

Experimental Tribometric Characteristics Analysis of a Ferrofluid Based Journal Bearing System

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