초록 ▼

The rotor of each stage of a turbine is surrounded, with a clearance by a fixed ring, formed by a metal ring supporting internally an annular thermal screen, in the form of ceramic segments. Expansions and contractions of the metal ring under the action of air which is supplied thereto in order to c

The rotor of each stage of a turbine is surrounded, with a clearance by a fixed ring, formed by a metal ring supporting internally an annular thermal screen, in the form of ceramic segments. Expansions and contractions of the metal ring under the action of air which is supplied thereto in order to control the said clearance are transformed into displacements of radial faces of the ring in contact with radial flanges rigid with the turbine casing and seals serve to ensure fluidtightness of the ring.

대표청구항 ▼

A turbine rotor assembly of a turbo-machine, comprising: a rotor (1A) for carrying rotor blades; a casing (3) surrounding the rotor; first and second plane radial flanges (4m, 4v) internally fixed to the casing (3); means defining an annular thermal screen surrounding tip portions of said rotor blad

A turbine rotor assembly of a turbo-machine, comprising: a rotor (1A) for carrying rotor blades; a casing (3) surrounding the rotor; first and second plane radial flanges (4m, 4v) internally fixed to the casing (3); means defining an annular thermal screen surrounding tip portions of said rotor blades, wherein said screeen further comprises a plurality of ceramic segments (8), each of said segments (8) having in upstream and downstream faces thereof a part-annular groove (8m, 8v) and carrying a coating (16) of an abradable material on an internal face thereof; a metal ring (5A, 5B) of hollow section with first and second plane radial walls (5m, 5v) which cooperate respectively with said plane radial flanges (4m, 4v) and further carrying radially-extending support members (5m2, 5v2) rigid with said radial walls (5m, 5v) wherein said support members extend radially inwardly of said ring (5A, 5B) in the form of first and second annular collars (5m2, 5v2) engaging said grooves (8m, 8v) of said segments and further having grooves formed on external lateral faces thereof; sealing means positioned between said grooves of said support members (5m2, 5v2) and said plain radial flanges (4m, 4v) wherein said sealing means further comprises a plurality of toroidal seals; and means for delivering air into an interior portion of said metal ring (5A, 5B).