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Flexible Spacers Compressor Stator Blades for Heavy Industrial Gas Turbines Model 7EA

[+] Author Affiliations
Steve Ingistov

BP Amoco, Los Angeles, CA

Paper No. GT2003-38937, pp. 913-921; 9 pages
doi:10.1115/GT2003-38937
From:
  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
  • Volume 2: Turbo Expo 2003
  • Atlanta, Georgia, USA, June 16–19, 2003
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3685-1 | eISBN: 0-7918-3671-1
  • Copyright © 2003 by ASME

abstract

This paper describes efforts to upgrade the mechanical integrity of axial compressor stator blades. The blades under discussion are part of an axial compressor of a heavy duty industrial Combustion Gas Turbine (CGT) made by GE, frame No. 7, model EA. The axial compressor stator blades, in the later stages of compression, are kept in required position by spacers or shims shaped to match the root profile of the blades. These spacers/shims may be as thick as 1/4 of an inch and as thin as 1/32 of an inch. These spacers/shims tend to wiggle out of the slots and eventually liberate themselves from the stator. This paper introduces a proposed solution to minimize liberation of the spacer/shims by introduction of flexible spacers/shims. This paper also describes field experience with loss of the stator blades in the last stage of compression, due to aerodynamic disturbances.

Copyright © 2003 by ASME

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