Impact absorbing blade mounts for variable pitch blades

Details Impact absorbing blade mounts for variable pitch blades Impact absorbing blade mounts for variable pitch blades

1975-05-29

1977-09-13

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Resilient bias or mount

416141, 416220R, 416248, F04D 2936, F01D 532

Patent

active

040478408

ABSTRACT:
A variable pitch blade and blade mount which is suitable for propellers, fans and the like and which has improved impact resistance. The invention is particularly directed to composite fan blades and blade mounting arrangements wherein the blades are permitted to pivot relative to a turbine hub about an axis generally parallel to the centerline of the engine upon impact of a large foreign object, such as a bird. By thus providing for the pivoting of the blades upon impact, centrifugal force recovery becomes the principal energy absorbing mechanism and a blade having improved impact strength is obtained.

REFERENCES:
patent: 2936155 (1960-05-01), Howell et al.
patent: 2997274 (1961-08-01), Hanson
patent: 3487879 (1970-01-01), McCarthy et al.
patent: 3689177 (1972-09-01), Klassen
patent: 3860361 (1975-01-01), McMurtry et al.
patent: 3870434 (1975-03-01), Paulson
patent: 3900274 (1975-08-01), Johnston et al.

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