High amplitude wave liner effects on journal bearing performance

Modification on the liner bearing was one of the ways to achieve sufficient lubricant on a journal bearing system. Efforts had shown that the ability to retain some lubricant by introducing wave like grooves on the liner has improved the performance of the bearings. However, the database for the mod...

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Main Author:	Asral, Asral
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/54829/1/AsralPFKM2015.pdf
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spelling	my-utm-ep.548292020-11-09T05:26:31Z High amplitude wave liner effects on journal bearing performance 2015-09 Asral, Asral TJ Mechanical engineering and machinery Modification on the liner bearing was one of the ways to achieve sufficient lubricant on a journal bearing system. Efforts had shown that the ability to retain some lubricant by introducing wave like grooves on the liner has improved the performance of the bearings. However, the database for the modifications is still lacking. This study aims to establish and correlate modifications of the liner with the performance of the journal bearing. Numerical and experimental work were done to compare and relate several geometries of liner bearing modifications based on previous studies as well as new ones. The previously studied sine wave liner bearing involved investigations with the square and semi circular liners. Plain liner bearing was used as reference. All cases were investigated experimentally by a test rig under low operating loads of 30 N to 450 N with high speed conditions of 1200 RPM to 2800 RPM. Some of the parameters were validated in order to compare the numerical and experimental data. Case studies also included engine oil and palm olein as the lubricants. The performance of the bearings was analyzed by examining the side flow rates, lubricant temperature change, eccentricity ratio, and pressure distributions. The results show that, modifying the shape liner bearing under all operating conditions could increase the lubricant flow rate which was approximately 1.5 times than the plain liner bearing and reduce the lubricant temperature change by about 35%. The bearings with the wave shape liner led to the eccentricity ratio increase but within the acceptable range of 0.6 to 0.9. Majority of the results showed lower a maximum pressure than the plain liner bearing with the exception of the bearing with the square wave shape liner. 2015-09 Thesis http://eprints.utm.my/id/eprint/54829/ http://eprints.utm.my/id/eprint/54829/1/AsralPFKM2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:96006 phd doctoral Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Asral, Asral High amplitude wave liner effects on journal bearing performance
description	Modification on the liner bearing was one of the ways to achieve sufficient lubricant on a journal bearing system. Efforts had shown that the ability to retain some lubricant by introducing wave like grooves on the liner has improved the performance of the bearings. However, the database for the modifications is still lacking. This study aims to establish and correlate modifications of the liner with the performance of the journal bearing. Numerical and experimental work were done to compare and relate several geometries of liner bearing modifications based on previous studies as well as new ones. The previously studied sine wave liner bearing involved investigations with the square and semi circular liners. Plain liner bearing was used as reference. All cases were investigated experimentally by a test rig under low operating loads of 30 N to 450 N with high speed conditions of 1200 RPM to 2800 RPM. Some of the parameters were validated in order to compare the numerical and experimental data. Case studies also included engine oil and palm olein as the lubricants. The performance of the bearings was analyzed by examining the side flow rates, lubricant temperature change, eccentricity ratio, and pressure distributions. The results show that, modifying the shape liner bearing under all operating conditions could increase the lubricant flow rate which was approximately 1.5 times than the plain liner bearing and reduce the lubricant temperature change by about 35%. The bearings with the wave shape liner led to the eccentricity ratio increase but within the acceptable range of 0.6 to 0.9. Majority of the results showed lower a maximum pressure than the plain liner bearing with the exception of the bearing with the square wave shape liner.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Asral, Asral
author_facet	Asral, Asral
author_sort	Asral, Asral
title	High amplitude wave liner effects on journal bearing performance
title_short	High amplitude wave liner effects on journal bearing performance
title_full	High amplitude wave liner effects on journal bearing performance
title_fullStr	High amplitude wave liner effects on journal bearing performance
title_full_unstemmed	High amplitude wave liner effects on journal bearing performance
title_sort	high amplitude wave liner effects on journal bearing performance
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/54829/1/AsralPFKM2015.pdf
_version_	1747817737028108288

High amplitude wave liner effects on journal bearing performance

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