Reinforced full-spar composite rotor blade

Details Reinforced full-spar composite rotor blade Reinforced full-spar composite rotor blade

1990-12-24

1992-07-07

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Formed with main spar

416229R, 2988971, B64C 1100

Patent

active

051278022

ABSTRACT:
A composite axial flow rotary machine blade (10) and method of blade construction is disclosed. A substantially full length composite spar (30) is spanwisely disposed within an airfoil planform (18) which supports an airfoil surface (11a). A pad of reinforcing fibers (40) is sandwiched between the spar's periphery and the airfoil surfaces' proximate inner surfaces (24a, b) corresponding to the pressure (22) and suction (24) sides of the airfoil planform in a spanwise distribution. A quantity of structural foam filler (50) is disposed through the balance of the blade's cavity (16).

REFERENCES:
patent: 2767461 (1956-10-01), Lebold et al.
patent: 3647317 (1972-03-01), Furlong et al.
patent: 3713753 (1973-01-01), Bronsch
patent: 3903578 (1975-09-01), Rothman
patent: 4268571 (1981-03-01), McCarthy
patent: 4470862 (1984-09-01), More et al.
patent: 4621980 (1986-11-01), Reavely et al.
patent: 4648921 (1987-03-01), Nutter, Jr.
patent: 4806077 (1989-02-01), Bost
patent: 5042968 (1991-08-01), Fecto
Mark's Standard Handbook for Mechanical Engineers, p. 11-102 (7th ed. 1978).

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