Patent ID: 8052385
Filing Date: 2011-11-08
Classification: F01D,F05D,Y02T,Y10T

Abstract:
1. Apparatus for locking a blade outer air seal (BOAS) in place about a turbine rotor stage for a jet engine that includes: an engine casing that surrounds said rotor stage, said casing having a circular radially disposed wall and an axially disposed groove adjacent said wall, said groove having an inner wall and an outer wall, said outer wall extending outwardly beyond the entrance to said groove; an annular hanger for supporting the BOAS, said hanger having a plurality of circumferentially spaced hanger elements that extend into said groove, said hanger further having a front face that is adjacent to the radial wall of the casing and an opposing rear face; an annular segmented assembly wherein each segment includes an arcuate shaped radially disposed panel and a plurality of hooks attached to said panel and passing between the hanger elements into said groove, each panel having a first sealing pad extending along its radially outer rim that rests in sealing contact against the outer wall of said groove and a second sealing pad extending along the front face of the panel that rests in sealing contact against the rear face of the annular hanger; each hook having a contact portion which engages said groove inner wall which acts as a fulcrum to apply a torque to the associated panel through said lever arm; and means to prevent axial movement of said segmented assembly.