公开(公告)号：US20190072186A1

公开(公告)日：2019-03-07

申请号：US15697062

申请日：2017-09-06

Applicant: General Electric Company

Inventor： Rahul Anil Bidkar ,  Bugra Ertas ,  Christopher Wolfe ,  Deepak Trivedi

IPC: F16J15/447

Abstract: A seal assembly for a rotary machine includes plural seal segments disposed circumferentially intermediate to a stationary housing and a rotor. One or more of the seal segments includes a stator interface element, a radially oriented front cover plate, and a movably supported shoe plate. The shoe plate includes one or more labyrinth teeth forming a primary seal with the rotor, a load bearing surface radially offset from the one or more labyrinth teeth, a radial surface forming a frictionless secondary seal with the front cover plate, and one or more internal passageways configured to direct fluid through the shoe plate or through the front cover plate, and between the radial surface of the shoe plate and the front cover plate to form the frictionless secondary seal.