Apparatus for preloading an airfoil blade in a gas turbine engin

Details Apparatus for preloading an airfoil blade in a gas turbine engin Apparatus for preloading an airfoil blade in a gas turbine engin

1991-03-01

1992-06-23

Denion, Thomas E.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

416219R, 416500, 403372, B63H 120

Patent

active

051238136

ABSTRACT:
Apparatus for preloading an airfoil blade attached to a rotor disk in a gas turbine engine. The dovetail root of a composite fan blade is preloaded to prevent rubbing and wear against the dovetail slot of a metal rotor disk during fan windmilling, with the aircraft engine off, due to wind and breezes at the airport. A resilient material is inserted into the lower portion of the slot below the engaged blade root. The disk has a radius which intersects the slot. The material is acted upon by a device which adjustably compresses the inserted material perpendicular to the radius of the disk. This causes the compressed material to exert a radially outward force against the bottom of the engaged root of the blade.

REFERENCES:
patent: 2846183 (1958-08-01), Morgan
patent: 3252687 (1966-05-01), Beck et al.
patent: 3545884 (1970-12-01), Schroeter
patent: 3936234 (1976-02-01), Tucker et al.
patent: 4142827 (1979-03-01), Vinciguerra
patent: 4208170 (1980-06-01), Tucker et al.
patent: 4245957 (1981-01-01), Savage et al.
patent: 4417854 (1983-11-01), Cain et al.
patent: 4836749 (1989-06-01), Gavilan
GE CF6-80A Engine Fan Blade Preloading (in use over one year).

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