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Vibroacoustic Early Warning System for Gas Turbines FREE

[+] Author Affiliations
Lyder Moen

Dynatrend a.s., Sola, Norway

Knuth Jahr

Kværner Energy a.s., Oslo, Norway

Paper No. 98-GT-302, pp. V003T07A009; 9 pages
doi:10.1115/98-GT-302
From:
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7864-4
  • Copyright © 1998 by ASME

abstract

Conventional engine shut-down systems for vibration protection of aero-derivative gas generators and power turbines are usually not appropriate for protecting the machines against component malfunction primary damage.

Consequences often seen are substantial secondary damages to the engine as a result of e.g. ballor roller bearing failure. Effects typically vary from various blade or vane damage, root fretting or blade rubbing, etc.

Conventional engine shut-down systems do not activate until a certain unbalance of energy is released. The nature of the signals related to bearing and bladepass are too small in energy, and lies in too high a frequency range to be monitored by conventional engine protection systems.

This paper highlights the importance of the early detection and trending of vibrations, and taking necessary actions to prevent secondary damage to the engine, and describes the experience from a dedicated vibration and acoustic analysis system designed for early warning of common faults.

Copyright © 1998 by ASME
This article is only available in the PDF format.

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