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Wheelspace windage cover plate for turbine

United States Patent

December 31, 2002
View the Complete Patent at the US Patent & Trademark Office
Windage cover plates are secured between the wheels and spacer of a turbine rotor to prevent hot flow path gas ingestion into the wheelspace cavities. Each cover plate includes a linear, axially extending body curved circumferentially with a radially outwardly directed wall at one axial end. The wall defines a axially opening recess for receiving a dovetail lug. The cover plate includes an axially extending tongue received in a circumferential groove of the spacer. The cover plate is secured with the tongue in the groove and dovetail lug in the recess. Lap joints between circumferentially adjacent cover plates are provided.
Lathrop; Norman Douglas (Ballston Lake, NY)
General Electric Company (Schenectady, NY)
09/ 576,066
May 22, 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.