Turbine or compressor stage for a turbojet
View Patent ↗A turbojet turbine or compressor stage is disclosed. The stage includes at least one rotor disk mounted inside a sectorized ring supported by a casing and including a circumferential flange radially clamped on an annular rail of the casing by a substantially C-shaped cross-section annular locking device which is axially engaged on the casing rail and on the flange of the ring. A substantially cylindrical heat shielding foil is interposed between the ring and the device. The foil or the device includes at least one extra thickness which respectively bears on the device, or the foil, to radially immobilize this foil.
1. A turbine or compressor stage for a turbojet, comprising:
at least one rotor disk mounted inside a sectorized ring supported by a casing and comprising a circumferential flange radially clamped on an annular rail of the casing by a substantially C-shaped cross-section annular locking device which is axially engaged on the casing rail and on the flange of the ring and which comprises two annular walls, respectively inner and outer, connected together through a substantially radial wall, a substantially cylindrical heat shielding foil being interposed between the ring and the inner wall of the device,
wherein the foil comprises at least one annular protuberance which is formed in a protruding manner on an outer surface of the foil and which extends on 360° around an axis of the foil, said annular protuberance having radial bearing means on the inner wall of the locking device.
2. A turbojet comprising at least one turbine or compressor stage according to claim 1 .
3. A stage according to claim 1 , wherein the protuberance protrudes in a radially outward direction.
4. A stage according to claim 1 , wherein the locking device comprises at least one circumferentially directed protuberance formed in a protruding manner on an inner surface of the inner wall and having radial bearing means on the foil radial bearing means.
5. A stage according to claim 4 , wherein the radial bearing means of the locking device is integrally formed with the locking device and the radial bearing means of the foil is integrally formed with the foil.