Test Results for Shaft Tracking Behavior of Pads in a Spherical Pivot Type Tilting Pad Journal Bearing

Simple item page
dc.contributor.authorSabnavis, Giridharen
dc.contributor.committeechairKirk, R. Gordonen
dc.contributor.committeememberKasarda, Mary E.en
dc.contributor.committeememberGuo, Zenglinen
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:36:17Zen
dc.date.adate2005-05-24en
dc.date.available2014-03-14T20:36:17Zen
dc.date.issued2005-04-14en
dc.date.rdate2005-05-24en
dc.date.sdate2005-05-11en
dc.description.abstractMost tilting pad journal bearing dynamic characteristics estimation methodologies assume perfect shaft tracking by the pads. In other words, they neglect pivot friction. In case of pads having point or line contact that operate under most normal load conditions, the pad tilting is due to a rocking motion which is not greatly influenced by friction. Hence this simplifying assumption might be acceptable. Heavier loading conditions, such as those typically encountered in gearboxes, demand the use of spherical pivots to avoid pivot failure. The spherical pivot is very attractive for this reason, but the tilting motion is rather a sliding action that must occur in the precision ball socket. A valid concern exists for verifying the soundness of assumed shaft tracking by the pads of such bearings. A "fixed test bearing, floating shaft" type of test rig previously built for determining the dynamic characteristics of bearings was accordingly modified to facilitate the testing of shaft tracking for a spherical pivot bearing. This thesis describes the modifications carried out on the rig. The special instrumentation and data acquisition systems implemented to observe the minute pad motion are also discussed. Some preliminary results of the tests are presented for various loading conditions. They show excellent shaft tracking by the pads. More detailed testing and analysis of data is required to fully understand the pad motion and tracking ability of the spherical pivot design.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-05112005-130612en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05112005-130612/en
dc.identifier.urihttp://hdl.handle.net/10919/32574en
dc.publisherVirginia Techen
dc.relation.haspartthesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectSpherical pivot bearingsen
dc.subjectshaft trackingen
dc.subjectpivot frictionen
dc.subjectpad motionen
dc.titleTest Results for Shaft Tracking Behavior of Pads in a Spherical Pivot Type Tilting Pad Journal Bearingen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis.pdf
Size:
2.08 MB
Format:
Adobe Portable Document Format
Download

Collections

Masters Theses