초록 ▼

A rotor assembly for use in a rotodynamic machine comprises a rotor disc (10) with a plurality of blades (14) attached to its outer rim (12) and a seal plate (22) for substantially preventing the escape of blade cooling air. The rotor disc (10) is provided with a plurality of hooked restraining memb

A rotor assembly for use in a rotodynamic machine comprises a rotor disc (10) with a plurality of blades (14) attached to its outer rim (12) and a seal plate (22) for substantially preventing the escape of blade cooling air. The rotor disc (10) is provided with a plurality of hooked restraining members (30) each including a radially inward directed abutment face (32) which in use restrain the seal plate from moving axially and from moving radially outward under centrifugal force by abutment with the seal plate. In this way the blades (14) are not subjected to additional loading by the seal plate (22).

대표청구항 ▼

A rotor assembly for a gas turbine engine, the assembly comprising: (a) a rotor disc having a rim; (b) a first hook means located in the rim, said first hook means having a first reaction surface directed radially inwards of the rim and an axially directed second reaction surface; (c) a second hook

A rotor assembly for a gas turbine engine, the assembly comprising: (a) a rotor disc having a rim; (b) a first hook means located in the rim, said first hook means having a first reaction surface directed radially inwards of the rim and an axially directed second reaction surface; (c) a second hook means located on the disc radially inwards of the first hook means and facing the disc; (d) rotor blade retaining means formed in the rim; (e) a plurality of rotor blades each comprising a root, a platform, and an aerofoil, said blades being attached to the disc by location of the roots in the blade retaining means; and (f) an annular seal plate for sealing engagement with the blade roots and the disc, said seal plate having: i. a radially outer portion terminating in a radially outer periphery extending to, but not contacting, the blade platform; ii. a radially inner portion axially offset from the outer portion and adapted to engage the second hook means and to contact the disc; and iii. an intermediate portion located between the outer and inner portions, said intermediate portion having an abutment means provided by the axial offset between the inner and outer portions, said abutment means comprising a radially outward facing abutment surface adapted to engage the first reaction surface of the first hook means and an axially facing surface adapted to engage the second reaction surface of the first hook means, thereby to urge the seal plate into sealing engagement with the disc and the blade roots without imposing significant axial or radial loading on the blade platforms.