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Pressure actuated film riding seals for turbo machinery

United States Patent

August 25, 2015
View the Complete Patent at the US Patent & Trademark Office
A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the sealing device segments includes a stator interface element, a shoe plate having an extended portion having one or more labyrinth teeth facing the rotor and a load bearing portion, wherein the shoe plate is configured to generate an aerodynamic force between the shoe plate and the rotor. The sealing device segment further includes a secondary seal configured to be in contact with the stator interface element at a radially outer end and configured to be in contact with an elevated nose section of the extended portion of the shoe plate on a radially inner end; and multiple flexible elements attached to the shoe plate and to the stator interface element.
Bidkar; Rahul Anil (Niskayuna, NY), Thatte; Azam Mihir (Arlington, MA), Gibson; Nathan Evan McCurdy (West Chester, OH), Giametta; Andrew Paul (Greenville, SC)
General Electric Company (Niskayuna, NY)
14/ 045,083
October 3, 2013
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.