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Tribological study of elastomeric bearings for marine propeller shaft system

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Title Tribological study of elastomeric bearings for marine propeller shaft system
 
Creator HIRANI, H
VERMA, M
 
Subject journal bearings
lubrication
misalignment
marine shaft bearing
fluid film thickness
coefficient of wear
bearing life
 
Description Elastomeric compounds, due to their favourable properties like sufficient hardness, toughness and natural resistance to abrasion and corrosion, are commonly used as bearing material for propeller shaft system of Indian Coast Guard Ships. Recently unequal and non-uniform wear of these bearings has resulted in unscheduled lay off of the Coast Guard Ships. To solve this problem of bearing wear, a mixed lubrication analysis of sea-water lubricated journal bearing has been attempted in the present study. A computer code was written to estimate lubricating film thickness for a given set of load and speed condition, and to predict the lubrication regime for the specified surface roughness parameters. To validate the theoretical analysis performed in the present study, the results obtained from the computer simulation have been compared with the established studies on the water lubricated bearing. To understand the uneven wear of marine bearings, actual geometric clearances of new and worn out bearings recorded by the ship maintenance team, and the operational data (load, speed and operating hours), obtained from the log books of ICGS Sangram (AOPV) of Indian Coast Guard, are listed in the present paper. The dynamic viscosity of sea water, surface roughness of propeller shaft and bearings, and particulate contamination has been measured. Finally, the suggestions have been enlisted for proper operation of shaft-bearing system so as to maintain the wear within the permissible limits during ship's operational cycle. (C) 2008
 
Publisher ELSEVIER SCI LTD
 
Date 2011-07-22T16:23:53Z
2011-12-26T12:52:29Z
2011-12-27T05:38:14Z
2011-07-22T16:23:53Z
2011-12-26T12:52:29Z
2011-12-27T05:38:14Z
2009
 
Type Article
 
Identifier TRIBOLOGY INTERNATIONAL, 42(2), 378-390
0301-679X
http://dx.doi.org/10.1016/j.triboint.2008.07.014
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6287
http://hdl.handle.net/10054/6287
 
Language en