Rotor blade retention

Details Rotor blade retention Rotor blade retention

1991-05-03

1992-11-17

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Turbo machine

416220R, 416500, F01D 530

Patent

active

051638177

ABSTRACT:
A rotor blade (1) is disclosed which recenters itself in relation to the retention member (10) in which it is installed. Imposition of an external force (A) upon the rotor blade (1) creates a moment (M) which acts about the rotor blade's root (3). Recentering is accomplished by centrifugal forces acting through an offset distance (C") resulting from an off-center rotation of the blade and its captivated shaped retaining pin (6) within a plurality of retention member tenons (12), achieving an enhanced opposing restorative moment (M'.sub.R) on the rotor blade (1). The retention member tenons (12) contain arcuate bearing surfaces (8) which bear against a corresponding arcuate surface (9) with a smaller radius of curvature lengthwise disposed on the shaped retaining pin (6).

REFERENCES:
patent: 2821357 (1958-01-01), Schorner
patent: 2944787 (1960-07-01), Gingras
patent: 3487879 (1970-01-01), McCarthy et al.
patent: 3694104 (1972-09-01), Erwin
patent: 3867066 (1975-02-01), Canova et al.
patent: 4175912 (1979-11-01), Crane et al.
patent: 4877376 (1989-10-01), Sikorski et al.
patent: 5017092 (1991-05-01), Violette et al.

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