Rotor blade flap driving apparatus

Details Rotor blade flap driving apparatus Rotor blade flap driving apparatus

1999-01-29

2000-08-29

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

With means moving working fluid deflecting working member...

244 75R, 244 78, 244 1725, B64C 1128

Patent

active

061098701

ABSTRACT:
A flap is attached to a rear end of a blade so as to be angularly displaceable. Displacement magnifying means magnifies the amount of displacement from an actuator to drive the flap. An input portion to which the displacement is applied from the actuator is expandably and contractibly supported by bellows. Likewise, an output portion to which the input amount of displacement is magnified is expandably and contractibly supported by a bellows. Consequently, displacement magnifying means is realized in which, compared with a existing piston with O ring which slides on the cylinder inner wall, no deterioration in response characteristic due to high friction occurs when the actuator is displaced at high speed, and no fluid leakage due to deterioration or wear of the O ring occurs. According to this structure, a rotor blade flap driving apparatus is obtained which has displacement magnifying means with fast response and no fluid leakage.

REFERENCES:
patent: 3940937 (1976-03-01), Yamakawa et al.
patent: 5639215 (1997-06-01), Yamakawa et al.

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