Bladed rotor with axially extending radially re-entrant features

Details Bladed rotor with axially extending radially re-entrant features Bladed rotor with axially extending radially re-entrant features

1990-10-01

1992-04-14

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

With heating, cooling or thermal insulation means

Changing state mass within or fluid flow through working...

416217, 416219R, 415115, B63H 114

Patent

active

051042908

ABSTRACT:
A bladed rotor (19) suitable for a gas turbine engine (10) comprises a plurality of aerofoil blades (21) mounted on the periphery of a disc (20). Each of the aerofoil blades (21) has a root part (25) which locates in the disc (20) and is constituted by two radially extending circumferentially spaced apart root portions (26,27). The circumferentially outward flanks of the root portions (26,27) are configured to define a fir-tree type blade fixing which locates in a correspondingly shaped recess (34) in the disc (20). The root part (25) configuration provides weight reduction in the rim region of the disc (20), thereby reducing stresses within the disc (20).

REFERENCES:
patent: 2859935 (1958-11-01), Roesch
patent: 3297301 (1967-01-01), Petrie et al.
patent: 3519368 (1970-07-01), Howald
patent: 3700348 (1972-10-01), Corsmeier et al.
patent: 3719431 (1973-03-01), Steele et al.
patent: 3749514 (1973-07-01), Kelch et al.
patent: 3832090 (1974-08-01), Matto
patent: 4260331 (1981-04-01), Goodwin
patent: 4344738 (1982-08-01), Kelly et al.
patent: 4759688 (1988-07-01), Wright et al.

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