SEAL ASSEMBLY FOR A ROTARY MACHINE

Abstract: a rotary machine seal assembly includes seal segments configured to circumferentially extend around a rotor between a stator and the rotor of a rotary machine. one or more seal segments include a shoe plate, a seal base, and at least one intermediate member. the shoe plate is disposed along the rotor. the seal base is disposed radially outward of the shoe plate. at least one intermediate member is coupled to and disposed between the seal base and the shoe plate. the at least one intermediate member includes an actuator portion having a first coefficient of thermal expansion and a constrictor portion having a different, second coefficient of thermal expansion. the at least one intermediate member is configured to move the shoe plate from a radially outward position to a radially inward position with respect to the rotor responsive to the at least one intermediate member undergoing a temperature change.

Inventor(s): Rahul Anil Bidkar, Deepak Trivedi, Christopher Edward Wolfe, Darren Lee Hallman, Kristopher Frutschy, Mark Bowen

CPC Classification: F01D11/025 (NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids ; non-positive displacement pumps ))

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