Skip to Content
Find More Like This
Return to Search

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

United States Patent

July 2, 2002
View the Complete Patent at the US Patent & Trademark Office
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.
Yu; Yufeng Phillip (Simpsonville, SC), Itzel; Gary Michael (Simpsonville, SC), Webbon; Waylon Willard (Greenville, SC), Bagepalli; Radhakrishna (Schenectady, NY), Burdgick; Steven Sebastian (Schenectady, NY), Kellock; Iain Robertson (Simpsonville, SC)
General Electric Company (Schenectady, NY)
09/ 593,276
June 13, 2000
This invention was made with Government support under Contract No. DE-FC21-95MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.