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BALANCE PISTON SEAL CENTERING

United States Patent Application

20160281729
A1
View the Complete Application at the US Patent & Trademark Office
A balance piston seal assembly for a balance piston of a compressor is provided. The balance piston seal assembly may include a balance piston seal, a stationary support, and a gripping assembly disposed between the balance piston seal and the stationary support. The balance piston seal may be configured to be disposed about the balance piston such that an inner radial surface of the balance piston seal and an outer radial surface of the balance piston define a radial clearance therebetween. The stationary support may be configured to be coupled or integral with a casing of the compressor. The gripping assembly may be configured to secure the balance piston seal with the stationary support and to maintain concentricity between the balance piston seal and the balance piston during thermal radial expansion of the balance piston seal relative to the balance piston.
Peer, David J. (Olean, NY), Wiederien, Richard J. (Bellevue, WA), Brown, Paul Morrison (Seattle, WA), Sorokes, James M. (Olean, NY), Kuzdzal, Mark J. (Allegany, NY)
DRESSER-RAND COMPANY (Olean NY)
15/ 075,400
March 21, 2016
STATEMENT OF GOVERNMENT INTEREST [0002] This invention was made with government support under Government Contract No. DOE-DE-FE0000493 awarded by the U.S. Department of Energy. The government has certain rights in the invention.