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The Synchronous Instability of a Compressor Rotor due to Bearing Journal Differential Heating FREE

[+] Author Affiliations
F. M. de Jongh

Delaval-Stork v.o.f., Hengelo, The Netherlands

P. G. Morton

Consulting Mechanical Engineer, Wolverhampton, UK

Paper No. 94-GT-035, pp. V005T14A002; 13 pages
doi:10.1115/94-GT-035
From:
  • ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General
  • The Hague, Netherlands, June 13–16, 1994
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7887-3
  • Copyright © 1994 by ASME

abstract

The paper describes a synchronous vibration instability problem encountered on a centrifugal compressor with oil lubricated bearings. The problem was solved by modification of the compressor rotor, however the root cause was not completely understood at that time. A possible explanation was based on a theory which suggested differential heating of the bearing journals. It was decided to verify ibis theory by experiments. Therefore a test rotor was designed with identical rotor dynamic characteristics to those of the compressor rotor. In order to fill a gap in the published research on bearing thermohydrodynamics an experimental technique was devised to measure the surface temperature variations around one of the journals of this rotor. The dependence of significant temperature differentials across the journal upon its orbit was confirmed.

Copyright © 1994 by ASME
This article is only available in the PDF format.

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