Variable pitch device for two blade stages fixed onto a...

Details Variable pitch device for two blade stages fixed onto a... Variable pitch device for two blade stages fixed onto a...

2006-05-02

2006-05-02

Verdier, Christopher (Department: 3745)

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Upstream of runner

C415S149400

Reexamination Certificate

active

07037070

ABSTRACT:
The pitch control mechanism (controlling the angular position) for stator blades in a turbojet may be adjusted separately for two adjacent stages of blades controlled by a common actuator10.To achieve this, the synchronization bar9located between the mechanisms leading to the two stages is inclined, this inclination being determined by a pin22and groove23connection with the casing, while another pin26and groove27connection is arranged between the synchronization bar9and one of the mechanisms. Strongly non-linear displacement laws between the two mechanisms may thus be controlled depending on the shapes and directions of the grooves.

REFERENCES:
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patent: 3873230 (1975-03-01), Norris et al.
patent: 4403912 (1983-09-01), Pekari et al.
patent: 5044879 (1991-09-01), Farrar
patent: 5190439 (1993-03-01), Das
patent: 5692879 (1997-12-01), Charbonnel
patent: 6092984 (2000-07-01), Bouyer

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