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Effects of the Hot Alignment of a Power Unit on Oil-Whip Instability Phenomena
Joint Authors
Source
International Journal of Rotating Machinery
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-09-30
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
This paper shows the results of the analysis of the dynamic behaviour of a power unit, whose shaft-train alignment was significantly influenced by the machine thermal state, that was affected in operating condition by high subsynchronous vibrations caused by oil-whip instability phenomena.
The dynamic stiffness coefficients of the oil-film journal bearings of the generator were evaluated considering the critical average journal positions that caused the instability onsets.
By including these bearing coefficients in a mathematical model of the fully assembled machine, the real part of the eigenvalue associated with the first balance resonance of the generator rotor became positive.
This paper shows the successful results obtained by combining diagnostic techniques based on mathematical models of journal bearings and shaft train with detailed analyses of monitoring data aimed to investigate the effects of the hot alignment of rotating machines on the occurrence of oil-whip instability onsets.
American Psychological Association (APA)
Vania, Andrea& Pennacchi, Paolo. 2010. Effects of the Hot Alignment of a Power Unit on Oil-Whip Instability Phenomena. International Journal of Rotating Machinery،Vol. 2010, no. 2010, pp.1-12.
https://search.emarefa.net/detail/BIM-467977
Modern Language Association (MLA)
Vania, Andrea& Pennacchi, Paolo. Effects of the Hot Alignment of a Power Unit on Oil-Whip Instability Phenomena. International Journal of Rotating Machinery No. 2010 (2010), pp.1-12.
https://search.emarefa.net/detail/BIM-467977
American Medical Association (AMA)
Vania, Andrea& Pennacchi, Paolo. Effects of the Hot Alignment of a Power Unit on Oil-Whip Instability Phenomena. International Journal of Rotating Machinery. 2010. Vol. 2010, no. 2010, pp.1-12.
https://search.emarefa.net/detail/BIM-467977
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-467977