Patent ID: 7264447
Filing Date: 2007-09-04
Classification: F01D

Abstract:
1. A sealing arrangement for an axial turbine wheel including a rotor disk and a plurality of turbine blades each having a base end retained by the rotor disk via a joint and extending radially from the rotor disk, comprising: an outer annular slot formed in base portions of the turbine blades so as to face radially inward in a coaxial relationship outwardly of the joints; an inner annular slot formed in the rotor disk so as to face radially outward in a coaxial relationship inwardly of the joints; an annular shoulder provided in a wall defining the inner annular slot on a side remote from the rotor disk, the annular shoulder thereby defining an inner narrow section and an outer wide section in the inner annular slot; and a fan-shaped seal plate made of resilient material and defined by an arcuate outer peripheral edge received in the outer annular slot and an arcuate inner peripheral edge received in the outer wide section of the inner annular slot, the outer and inner peripheral edges being disposed in a coaxial relationship; wherein the depth of the outer annular slot is equal to or greater than the depth of the inner narrow section of the inner annular slot, and the radial dimension of the seal plate is substantially equal to the distance between a bottom of the outer annular slot and the annular shoulder.