Actuator for variable vanes

Details Actuator for variable vanes Actuator for variable vanes

1985-09-13

1987-09-22

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Including destructible, fusible, or deformable non-reusable...

415156, 415160, F04D 2956

Patent

active

046952209

ABSTRACT:
Disclosed is an actuator for rotating a plurality of circumferentially spaced variable vanes each having a spindle extending through a casing about which the vane is rotatable. The actuator includes an arcuate unison member and a plurality of levers each having first and second ends, respective ones of the levers being fixedly attached to a vane spindle at the lever first end and rotatably attached to the unison member at the lever second end. Frangible means are provided for allowing at least one of the vanes to be rotated to an angular position different from the position of adjacent ones of the vanes upon impact of the one vane by a foreign object, and limit means are provided for maintaining the angular position of the one vane within predetermined limits with respect to the angular position of adjacent vanes to prevent 1/REV excitation.

REFERENCES:
patent: 3060706 (1962-10-01), Hess
patent: 3639072 (1972-02-01), Munkstrand
patent: 4022540 (1977-05-01), Young
patent: 4040766 (1977-08-01), Sekido et al.
patent: 4050844 (1977-09-01), Miller et al.
patent: 4514141 (1985-04-01), Marey

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