Patent ID: 6425241
Filing Date: 2002-07-30
Classification: F01D,F02C,F05D

Abstract:
A pyrometer mount and nozzle stage assembly for a closed-circuit thermal medium cooled gas turbine, comprising:a nozzle stage segment having inner and outer bands with at least one nozzle vane extending therebetween, said bands and said vane adapted to lie in a hot gas path of the turbine; a cover spaced from said outer band and lying on a side thereof remote from said vane, said cover and said outer band defining a plenum for receiving the thermal medium; said outer band and said cover having openings therethrough in registration with one another; and a pyrometer boss having an aperture therethrough disposed in said registering openings, said boss being welded to both said outer band and said cover to seal the cooling medium within the plenum without cooling medium leakage about the boss.