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Title: Pyrometer mount for a closed-circuit thermal medium cooled gas turbine

Abstract

A steam-cooled second-stage nozzle segment has an outer band and an outer cover defining a plenum therebetween for receiving cooling steam for flow through the nozzles to the inner band and cover therefor and return flow through the nozzles. To measure the temperature of the buckets of the stage forwardly of the nozzle stage, a pyrometer boss is electron beam-welded in an opening through the outer band and TIG-welded to the outer cover plate. By machining a hole through the boss and seating a linearly extending tube in the boss, a line of sight between a pyrometer mounted on the turbine frame and the buckets is provided whereby the temperature of the buckets can be ascertained. The welding of the boss to the outer band and outer cover enables steam flow through the plenum without leakage, while providing a line of sight through the outer cover and outer band to measure bucket temperature.

Inventors:
 [1];  [2];  [3];  [4]
  1. (Duanesburg, NY)
  2. (late of Galway, NY)
  3. (Schenectady, NY)
  4. (Clifton Park, NY)
Publication Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
874620
Patent Number(s):
US 6425241
Assignee:
General Electric Company (Schenectady, NY) NETL
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pyrometer; mount; closed-circuit; thermal; medium; cooled; gas; turbine; steam-cooled; second-stage; nozzle; segment; outer; band; cover; defining; plenum; therebetween; receiving; cooling; steam; flow; nozzles; inner; return; measure; temperature; buckets; stage; forwardly; boss; electron; beam-welded; tig-welded; plate; machining; hole; seating; linearly; extending; tube; line; sight; mounted; frame; provided; ascertained; welding; enables; leakage; providing; bucket; electron beam; gas turbine; steam flow; nozzle segment; /60/

Citation Formats

Jones, Raymond Joseph, Kirkpatrick, Francis Lawrence, Burns, James Lee, and Fulton, John Robert. Pyrometer mount for a closed-circuit thermal medium cooled gas turbine. United States: N. p., 2002. Web.
Jones, Raymond Joseph, Kirkpatrick, Francis Lawrence, Burns, James Lee, & Fulton, John Robert. Pyrometer mount for a closed-circuit thermal medium cooled gas turbine. United States.
Jones, Raymond Joseph, Kirkpatrick, Francis Lawrence, Burns, James Lee, and Fulton, John Robert. Tue . "Pyrometer mount for a closed-circuit thermal medium cooled gas turbine". United States. https://www.osti.gov/servlets/purl/874620.
@article{osti_874620,
title = {Pyrometer mount for a closed-circuit thermal medium cooled gas turbine},
author = {Jones, Raymond Joseph and Kirkpatrick, Francis Lawrence and Burns, James Lee and Fulton, John Robert},
abstractNote = {A steam-cooled second-stage nozzle segment has an outer band and an outer cover defining a plenum therebetween for receiving cooling steam for flow through the nozzles to the inner band and cover therefor and return flow through the nozzles. To measure the temperature of the buckets of the stage forwardly of the nozzle stage, a pyrometer boss is electron beam-welded in an opening through the outer band and TIG-welded to the outer cover plate. By machining a hole through the boss and seating a linearly extending tube in the boss, a line of sight between a pyrometer mounted on the turbine frame and the buckets is provided whereby the temperature of the buckets can be ascertained. The welding of the boss to the outer band and outer cover enables steam flow through the plenum without leakage, while providing a line of sight through the outer cover and outer band to measure bucket temperature.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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