Arrangement for radially positioning a turbine brush seal within a labyrinth seal

摘要

An arrangement (10) and method for radially positioning a brush seal (12) relative to a rotor (R) provides a main seal segment (18) having a slot (30) open toward the rotor (R) and an interior ledge (36) facing away from the rotor (R), a brush seal segment (28) in the slot (30) and having an exterior shoulder (38) facing toward the rotor (R) and overlying the interior ledge (36) such that the brush seal segment (28) can move radially relative to the main seal segment (18) and rotor (R) and the exterior shoulder (38) can move toward and away from the interior ledge (36), a shim (33) disposed and establishing a minimum spacing between the interior ledge (36) and the exterior shoulder (38), and set screws (46) tightened into spaced threaded holes (44) in the main seal segment (18) forcing the exterior shoulder (38) against the shim (33) and to the minimum spacing from the interior ledge (36) so as to prevent radial floating of the brush seal segment (28) in the slot (30).