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EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING

The phenomenon of vapor cavitation in hydrodynamic bearings and its detrimental effects have been documented in many literatures. Collapse of vapor cavitation bubbles may cause erosion wear that limits the life of the bearings. The ability to detect the occurrence of vapor cavitation using a well...

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Main Author: HJ YUSOF, ROSLI
Format: Thesis
Language:English
Published: 2015
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://utpedia.utp.edu.my/id/eprint/21366/1/2014-MECHANICAL-EXPERIMENTAL%20INVESTIGATION%20OF%20VIBRATION%20CHARACTERISTICS%20FOR%20VAPOR%20CAVITATION%20EROSION%20IN%20PLAIN%20JOURNAL%20BEARING-ROSLI%20BIN%20HJ%20YUSOF.pdf
http://utpedia.utp.edu.my/id/eprint/21366/
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spelling oai:utpedia.utp.edu.my:213662024-07-24T04:19:01Z http://utpedia.utp.edu.my/id/eprint/21366/ EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING HJ YUSOF, ROSLI TJ Mechanical engineering and machinery The phenomenon of vapor cavitation in hydrodynamic bearings and its detrimental effects have been documented in many literatures. Collapse of vapor cavitation bubbles may cause erosion wear that limits the life of the bearings. The ability to detect the occurrence of vapor cavitation using a well established condition monitoring technique is essential for the equipment operator. The occurance of vapor cavitation, particularly in elliptical journal bearings, is not well reported in literature. An experiment was therefore conducted to investigate the vibration characteristics of vapor cavitation erosion in steadily loaded, elliptical journal bearings of a running gearbox. Vibration data were collected from the bearings operating under the influence of vapor cavitation erosion. The results showed that, vapor cavitation erosion exhibit distinct characteristics on the vibration plots. Low amplitude, forward and reverse 0.063X frequency components, and a series of harmonics with frequencies lower than 0.5X, were observed on the full spectrum. A unique, asymmetrical waveform with the positivepeakamplitude fluctuating above and below the zero axis line was also observed. The whirling shaft was also unstable under the vaporcavitation condition. When the vaporcavitation was removed by increasing the oil supply flow and pressure, the subsynchronous vibration components lower than 0.5X were not seen on the full spectrum. The waveform was symmetrical and the whirling shaft was also stable without the vapor cavitation erosion. 2015-12 Thesis NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/id/eprint/21366/1/2014-MECHANICAL-EXPERIMENTAL%20INVESTIGATION%20OF%20VIBRATION%20CHARACTERISTICS%20FOR%20VAPOR%20CAVITATION%20EROSION%20IN%20PLAIN%20JOURNAL%20BEARING-ROSLI%20BIN%20HJ%20YUSOF.pdf HJ YUSOF, ROSLI (2015) EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING. Masters thesis, Universiti Teknologi PETRONAS.
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Electronic and Digitized Intellectual Asset
url_provider http://utpedia.utp.edu.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
HJ YUSOF, ROSLI
EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING
description The phenomenon of vapor cavitation in hydrodynamic bearings and its detrimental effects have been documented in many literatures. Collapse of vapor cavitation bubbles may cause erosion wear that limits the life of the bearings. The ability to detect the occurrence of vapor cavitation using a well established condition monitoring technique is essential for the equipment operator. The occurance of vapor cavitation, particularly in elliptical journal bearings, is not well reported in literature. An experiment was therefore conducted to investigate the vibration characteristics of vapor cavitation erosion in steadily loaded, elliptical journal bearings of a running gearbox. Vibration data were collected from the bearings operating under the influence of vapor cavitation erosion. The results showed that, vapor cavitation erosion exhibit distinct characteristics on the vibration plots. Low amplitude, forward and reverse 0.063X frequency components, and a series of harmonics with frequencies lower than 0.5X, were observed on the full spectrum. A unique, asymmetrical waveform with the positivepeakamplitude fluctuating above and below the zero axis line was also observed. The whirling shaft was also unstable under the vaporcavitation condition. When the vaporcavitation was removed by increasing the oil supply flow and pressure, the subsynchronous vibration components lower than 0.5X were not seen on the full spectrum. The waveform was symmetrical and the whirling shaft was also stable without the vapor cavitation erosion.
format Thesis
author HJ YUSOF, ROSLI
author_facet HJ YUSOF, ROSLI
author_sort HJ YUSOF, ROSLI
title EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING
title_short EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING
title_full EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING
title_fullStr EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING
title_full_unstemmed EXPERIMENTAL INVESTIGATION OF VIBRATION CHARACTERISTICS FOR VAPOR CAVITATION EROSION IN PLAIN JOURNAL BEARING
title_sort experimental investigation of vibration characteristics for vapor cavitation erosion in plain journal bearing
publishDate 2015
url http://utpedia.utp.edu.my/id/eprint/21366/1/2014-MECHANICAL-EXPERIMENTAL%20INVESTIGATION%20OF%20VIBRATION%20CHARACTERISTICS%20FOR%20VAPOR%20CAVITATION%20EROSION%20IN%20PLAIN%20JOURNAL%20BEARING-ROSLI%20BIN%20HJ%20YUSOF.pdf
http://utpedia.utp.edu.my/id/eprint/21366/
_version_ 1805891028639547392
score 13.211869

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