公开(公告)号：US12270305B2

公开(公告)日：2025-04-08

申请号：US17908368

申请日：2020-03-30

Applicant: General Electric Company

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

IPC: F01D11/02 ,  F16J15/447

Abstract: A rotary machine seal assembly (200) includes seal segments (102) configured to circumferentially extend around a rotor (108) between a stator (106) and the rotor (108) of a rotary machine. One or more seal segments include a shoe plate (110, 410, 710, 910), a seal base (112, 412, 712, 912), and at least one intermediate member (114, 414, 714). 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 (302, 402, 702, 902) having first coefficient of thermal expansion and a constrictor portion (304, 404, 704, 904) 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.