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Stage 3 bucket shank bypass holes and related method

United States Patent

6,428,270
August 6, 2002
View the Complete Patent at the US Patent & Trademark Office
In a multi-stage turbine wherein at least one turbine wheel supports a row of buckets for rotation, and wherein the turbine wheel is located axially between first and second annular fixed arrays of nozzles, a cooling air circuit for purging a wheelspace between the turbine wheel and the second fixed annular array of nozzles comprising a flowpath through a shank portion of one or more buckets connecting a wheelspace between the turbine wheel and the first fixed annular array of nozzles with the wheelspace between the turbine wheel and the second fixed annular array of nozzles.
Leone; Sal Albert (Scotia, NY), Eldrid; Sacheverel Quentin (Saratoga Springs, NY), Lupe; Douglas Arthur (Ballston Lake, NY)
General Electric Company (Schenectady, NY)
09/ 662,780
September 15, 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.