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Title: Support pedestals for interconnecting a cover and nozzle band wall in a gas turbine nozzle segment

Abstract

A gas turbine nozzle segment has outer and inner band portions. Each band portion includes a nozzle wall, a cover and an impingement plate between the cover and nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through the apertures of the impingement plate to cool the nozzle wall. Structural pedestals interconnect the cover and nozzle wall and pass through holes in the impingement plate to reduce localized stress otherwise resulting from a difference in pressure within the chamber of the nozzle segment and the hot gas path and the fixed turbine casing surrounding the nozzle stage. The pedestals may be cast or welded to the cover and nozzle wall.

Inventors:
 [1];  [1];  [2];  [3];  [3];  [1]
  1. Simpsonville, SC
  2. Greenville, SC
  3. Schenectady, NY
Issue Date:
Research Org.:
General Electric Co., Schenectady, NY (United States)
OSTI Identifier:
874551
Patent Number(s):
6413040
Assignee:
General Electric Company (Schenectady, NY)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
support; pedestals; interconnecting; cover; nozzle; band; wall; gas; turbine; segment; outer; inner; portions; portion; impingement; plate; defining; cavities; opposite; cooling; steam; supplied; cavity; flow; apertures; cool; structural; interconnect; pass; holes; reduce; localized; stress; otherwise; resulting; difference; pressure; chamber; hot; path; fixed; casing; surrounding; stage; cast; welded; gas turbine; hot gas; turbine nozzle; nozzle segment; /415/

Citation Formats

Yu, Yufeng Phillip, Itzel, Gary Michael, Webbon, Waylon Willard, Bagepalli, Radhakrishna, Burdgick, Steven Sebastian, and Kellock, Iain Robertson. Support pedestals for interconnecting a cover and nozzle band wall in a gas turbine nozzle segment. United States: N. p., 2002. Web.
Yu, Yufeng Phillip, Itzel, Gary Michael, Webbon, Waylon Willard, Bagepalli, Radhakrishna, Burdgick, Steven Sebastian, & Kellock, Iain Robertson. Support pedestals for interconnecting a cover and nozzle band wall in a gas turbine nozzle segment. United States.
Yu, Yufeng Phillip, Itzel, Gary Michael, Webbon, Waylon Willard, Bagepalli, Radhakrishna, Burdgick, Steven Sebastian, and Kellock, Iain Robertson. Tue . "Support pedestals for interconnecting a cover and nozzle band wall in a gas turbine nozzle segment". United States. https://www.osti.gov/servlets/purl/874551.
@article{osti_874551,
title = {Support pedestals for interconnecting a cover and nozzle band wall in a gas turbine nozzle segment},
author = {Yu, Yufeng Phillip and Itzel, Gary Michael and Webbon, Waylon Willard and Bagepalli, Radhakrishna and Burdgick, Steven Sebastian and Kellock, Iain Robertson},
abstractNote = {A gas turbine nozzle segment has outer and inner band portions. Each band portion includes a nozzle wall, a cover and an impingement plate between the cover and nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through the apertures of the impingement plate to cool the nozzle wall. Structural pedestals interconnect the cover and nozzle wall and pass through holes in the impingement plate to reduce localized stress otherwise resulting from a difference in pressure within the chamber of the nozzle segment and the hot gas path and the fixed turbine casing surrounding the nozzle stage. The pedestals may be cast or welded to the cover and nozzle wall.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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Works referenced in this record:

Development Requirements for an Advanced Gas Turbine System
journal, October 1995


Advances in Steam Path Technology
journal, April 1996