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Turbomachine rotor with improved cooling

United States Patent

5,755,556
May 26, 1998
View the Complete Patent at the US Patent & Trademark Office
A gas turbine rotor has an essentially closed loop cooling air scheme in which cooling air drawn from the compressor discharge air that is supplied to the combustion chamber is further compressed, cooled, and then directed to the aft end of the turbine rotor. Downstream seal rings attached to the downstream face of each rotor disc direct the cooling air over the downstream disc face, thereby cooling it, and then to cooling air passages formed in the rotating blades. Upstream seal rings attached to the upstream face of each disc direct the heated cooling air away from the blade root while keeping the disc thermally isolated from the heated cooling air. From each upstream seal ring, the heated cooling air flows through passages in the upstream discs and is then combined and returned to the combustion chamber from which it was drawn.
Hultgren; Kent Goran (Winter Park, FL), McLaurin; Leroy Dixon (Winter Springs, FL), Bertsch; Oran Leroy (Titusville, FL), Lowe; Perry Eugene (Oviedo, FL)
Westinghouse Electric Corporation (Pittsburgh, PA)
08/ 649,507
May 17, 1996
REFERENCE TO GOVERNMENT CONTRACTS Development for this invention was supported in part by U.S. Department of Energy contract DE-AC2193MC30247. Accordingly, the U.S. government may have certain rights in the invention.