Composite rotor blade

Details Composite rotor blade Composite rotor blade

1989-09-08

1991-02-26

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Laminated, embedded member or encased material

416229A, 416248, F01D 514

Patent

active

049957880

ABSTRACT:
A composite rotor blade (2) with airfoil surfaces (4) used in rotary machines and a method for making the rotor blade (2) are disclosed. The rotor blade (2) includes a spar (8) with a root (12) which incorporates chordwise distributed recesses (13) which capture the composite laminate (16) which forms external airfoil surfaces (4). The root recesses (13) are sized so as to capture the volumetric bulk of the composite laminate (16) below the loadbearing surfaces (21) of the root (12) which fits into a complementary shaped recess (7) located within the rotatable hub (14). The method includes the steps of forming a composite rotor blade (2).

REFERENCES:
patent: 2644537 (1953-07-01), Meyers
patent: 2873088 (1959-02-01), Neumann
patent: 3487879 (1970-01-01), McCarthy et al.
patent: 3694104 (1972-09-01), Erwin
patent: 3799701 (1974-03-01), Rothman
patent: 3883267 (1975-05-01), Baudier et al.
patent: 4037990 (1977-07-01), Harris
patent: 4040770 (1977-08-01), Carlson
patent: 4417854 (1983-11-01), Cain et al.
patent: 4784575 (1988-11-01), Nelson

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