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Film riding seals for rotary machines

United States Patent

9,587,746
March 7, 2017
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 segments includes a shoe plate with a forward-shoe section and an aft-shoe section having one or more labyrinth teeth therebetween facing the rotor. The sealing device includes a stator interface element having a groove or slot for allowing disposal of a spline seal for preventing segment leakages. The sealing device segment also includes multiple bellow springs or flexures connected to the shoe plate and to the stator interface element. Further, the sealing device segments include a secondary seal integrated with the stator interface element at one end and positioned about the multiple bellow springs or flexures and the shoe plate at the other end.
Bidkar; Rahul Anil (Niskayuna, NY), Sarawate; Neelesh Nandkumar (Niskayuna, NY), Wolfe; Christopher Edward (Niskayuna, NY), Ruggiero; Eric John (Niskayuna, NY), Raj Mohan; Vivek Raja (State College, PA)
General Electric Company (Niskayuna, NY)
13/ 562,705
20140062024
July 31, 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.