Composite blade having wear resistant tip

Details Composite blade having wear resistant tip Composite blade having wear resistant tip

1990-10-18

1992-05-12

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Laminated, embedded member or encased material

415200, 4151744, F01D 1100, F01D 5/14

Patent

active

051121948

ABSTRACT:
A fan blade (24) comprising an airfoil shell (30) made of a fiber reinforced relatively low wear resistance composite material has a tip portion (34) having a plurality of elongated filaments (50) of a highly wear resistant material, most advantageously rod-like boron filaments, embedded therein so as to extend inwardly from the outboard facing surface (36) of the blade (24) and substantially perpendicularly thereto. The filaments (50) comprise cutting elements which serve to rapidly cut away the sacrificial layer (40) of the surrounding fan duct (16) whenever the blade tip (34) comes into contact with the layer (40) thereby protecting the blade tip (34) from excessive wear.

REFERENCES:
patent: 3090703 (1963-05-01), Gruber et al.
patent: 3679324 (1972-07-01), Stargardter
patent: 4010884 (1977-03-01), Rothman
patent: 4043703 (1977-08-01), Carlson
patent: 4071184 (1978-01-01), Carlson et al.
patent: 4111606 (1978-09-01), Prewo
patent: 4249913 (1981-02-01), Johnson et al.
patent: 4426193 (1984-01-01), Carlson
patent: 4550063 (1985-10-01), Galasso et al.
patent: 4851188 (1989-07-01), Schaefer et al.

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