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

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874620

Jones, Raymond Joseph ^[1]; Kirkpatrick, Francis Lawrence ^[2]; Burns, James Lee ^[3]; Fulton, John Robert ^[4]

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1. Duanesburg, NY
2. late of Galway, NY
3. Schenectady, NY
4. Clifton Park, NY

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.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6425241
• OSTI ID: 874620
• Country of Publication: United States
• Language: English

Related Subjects

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
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