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Aerodynamic seals for rotary machine

United States Patent

February 9, 2016
View the Complete Patent at the US Patent & Trademark Office
An aerodynamic seal assembly for a rotary machine includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the segments includes a shoe plate with a forward-shoe section and an aft-shoe section having multiple labyrinth teeth therebetween facing the rotor. The sealing device segment also includes multiple flexures connected to the shoe plate and to a top interface element, wherein the multiple flexures are configured to allow the high pressure fluid to occupy a forward cavity and the low pressure fluid to occupy an aft cavity. Further, the sealing device segments include a secondary seal attached to the top interface element at one first end and positioned about the flexures and the shoe plate at one second end.
Bidkar; Rahul Anil (Niskayuna, NY), Cirri; Massimiliano (Munich, DE), Thatte; Azam Mihir (Rotterdam, NY), Williams; John Robert (Fairfield, OH)
General Electric Company (Niskayuna, NY)
13/ 542,780
July 6, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH & DEVELOPMENT This invention was made with partial Government support under contract number DE-FC26-05NT42643 awarded by U.S. Department of Energy. The Government has certain rights in the invention.