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Film riding seal assembly for turbomachinery

United States Patent

June 7, 2016
View the Complete Patent at the US Patent & Trademark Office
An aerodynamic seal assembly for a rotary machine includes multiple sealing segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the segments includes a shoe plate with a forward load-bearing section and an aft load-bearing section configured to generate an aerodynamic force between the shoe plate and the rotor. The shoe plate includes at least one labyrinth teeth facing the rotor and positioned between the forward load-bearing section and the aft load-bearing section. The sealing segment also includes at least one spring connected to a pedestal located about midway of an axial length of the shoe plate and to a stator interface element. Further, the sealing segment includes a rigid segmented secondary seal attached to the stator interface element at one first end and in contact with the pedestal of the shoe plate at one second end.
Bidkar; Rahul Anil (Niskayuna, NY), Giametta; Andrew Paul (Greenville, SC), Gibson; Nathan Evan McCurdy (West Chester, OH), Cleveland; Nicolas Joseph (Cohoes, NY)
General Electric Company (Niskayuna, NY)
14/ 325,452
July 8, 2014
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.