Brake for counter rotating bladed members

Details Brake for counter rotating bladed members Brake for counter rotating bladed members

1985-06-17

1987-02-10

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Plural impellers having relative movement or independent...

Coaxial rotation

416169R, 416170R, 416 32, B64C 1148

Patent

active

046420290

ABSTRACT:
In an aircraft propulsion system including a gas turbine engine driving a pair of counter rotating bladed members through a planetary gear set, a brake for simultaneously retarding rotation of both bladed members after engine shut-down includes a pair of concentric transfer shafts each rotatably connected to separate elements of the planetary gear set, a pair of friction plates supported on respective ones of the transfer shafts for rotation therewith, a plurality of non-rotatable reaction members between the friction plates, and a single actuator selectively operable to compress the stack of friction plates and reaction members to simultaneously retard rotation of both transfer shafts and thereby simultaneously retard rotation of and eventually simultaneously stop both of the counter rotating bladed members.

REFERENCES:
patent: 2312624 (1943-03-01), Caldwell
patent: 2482460 (1949-09-01), Browne
patent: 2702100 (1955-02-01), Montieth
patent: 2826255 (1958-03-01), Peterson
patent: 3646834 (1972-03-01), Davis
patent: 3679033 (1972-07-01), Wagner
patent: 4376614 (1983-03-01), Woodruff
patent: 4567965 (1986-02-01), Woodruff

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