Variable cam exhaust nozzle
AssigneeThe NORDAM Group, Inc.
InventorJean-Pierre Lair
Life of this patent
Estimating the term…
Abstract
An exhaust nozzle includes an exhaust duct with an outlet and a row of radial apertures upstream therefrom. A radial frame surrounds the duct upstream from the apertures. A row of flaps are hinged to the frame to selectively cover and uncover the apertures for controlling exhaust flow discharged therethrough. An arcuate unison bar surrounds the duct adjacent to the frame and includes circumferentially spaced apart cam followers engaging corresponding cams affixed to the flaps. An actuator is joined to the bar for selective rotation thereof between opposite first and second directions to pivot open and closed the flaps atop the apertures.
Claims24
A gas turbine engine exhaust nozzle comprising:
- an exhaust duct having an outlet at an aft end thereof for discharging exhaust flow, and including a row of radial apertures spaced upstream from said outlet;
- a radial frame extending circumferentially around said duct and spaced forward from said apertures;
- a plurality of flaps hinged at upstream ends thereof to said frame to selectively cover and uncover said apertures for controlling exhaust flow discharge therethrough, and each flap including a cam extending radially outwardly therefrom for radial and axial movement therewith as said flap pivots;
- an arcuate unison bar mounted circumferentially around said duct adjacent to said frame, and including a plurality of cam followers spaced circumferentially apart in radial engagement with corresponding ones of said cams affixed to said flaps;
- and
- an actuator joined to said bar for selectively rotating said bar in a first direction to pivot open said flaps, and in an opposite second direction to pivot closed said flaps to cover said apertures.
A gas turbine engine exhaust nozzle comprising:
- an exhaust duct having an outlet at an aft end thereof for discharging exhaust flow, and including a row of radial apertures spaced upstream from said outlet;
- a radial frame extending circumferentially around said duct and spaced forward from said apertures;
- a plurality of flaps each pivotally joined to said radial frame by a pair of hinges to selectively cover and uncover said apertures for controlling exhaust flow discharge therethrough, and each flap including a cam extending radially outwardly therefrom for radial and axial movement therewith as said flap pivots;
- an arcuate unison bar mounted circumferentially around said duct adjacent to said frame, and including a plurality of cam rollers spaced circumferentially apart in radial engagement with corresponding ones of said cams affixed to said flaps;
- and
- an actuator joined to said bar for selectively rotating said bar in a first direction to pivot open said flaps, and in an opposite second direction to pivot closed said flaps to cover said apertures.
Dependencies are inferred from the claim text.