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Turbine blade platform seal

United States Patent

August 14, 2001
View the Complete Patent at the US Patent & Trademark Office
A rotating blade group 90 for a turbo-machine having an improved device for sealing the gap 110 between the edges 112,114 of adjacent blade platforms 96,104. The gap 110 between adjacent blades 92,100 is sealed by a seal pin 20 its central portion 110 and by a seal plate 58,60 at each of the front 54 and rear 56 portions. The seal plates 58,60 are inserted into corresponding grooves 62,64 formed in the adjacent edges 112,114 of adjoining blades 92,100 and held in place by end plates 40,42. The end of the seal plates 58,60 may be chamfered 78,80 to improve the seal against the end plate 40,42. The seal pin 20 provides the required damping between the blades 92,100 and the seal plates 58,60 provide improved sealing effectiveness.
Zagar; Thomas W. (Winter Springs, FL), Schiavo; Anthony L. (Oviedo, FL)
Siemens Westinghouse Power Corporation (Orlando, FL)
09/ 245,816
February 5, 1999
This invention was made with United States Government support under contract number DEFC21-95MC32267 awarded by the Department of Energy. The Government has certain rights in this invention.