Variable area fan nozzle hidden blocker door thrust reverser

Patent metadata

Field	Value
Publication number	US-9915226-B2
Application number	US-201514743649-A
Country	US
Kind code	B2
Filing date	Jun 18, 2015
Priority date	Jun 18, 2015
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A thrust reverser of an aircraft comprises a blocker door and a variable area fan nozzle (VAFN) panel configured to conceal the blocker door from a duct associated with a bypass fan flow when the VAFN panel is in a closed position.

First claim

I claim:

1. A thrust reverser of an aircraft comprising: a blocker door mounted on the thrust reverser for movement between a stowed position and a deployed position in which the blocker door redirects air in a bypass duct in a reverse thrust direction;
a variable area fan nozzle (VAFN) panel mounted on the thrust reverser for translating movement relative thereto, and configured to translate between a closed position in which the VAFN panel conceals the blocker door from the duct, and an open position in which the VAFN panel position results in an increase in the nozzle cross-sectional area of the duct;
a set of cascades; and
a translating sleeve configured to expose or conceal the cascades and move relative to the VAFN panel.

2. The thrust reverse of claim 1 , further comprising a first seal between the translating sleeve and the VAFN panel.

3. The thrust reverser of claim 2 , further comprising: a second seal between the translating sleeve and a bull-nose.

4. The thrust reverser of claim 1 , further comprising a first actuator configured to cause a translation of the VAFN panel.

5. The thrust reverser of claim 4 , further comprising: a second actuator configured to cause a translation of the translating sleeve that is configured to expose or conceal a set of cascades.

6. The thrust reverser of claim 1 , further comprising:
a track-and-slider system that facilitates the translation of the VAFN panel.

7. The thrust reverser of claim 6 , wherein one of a track or a slider of the track-and-slider system is located directly on a fixed structure of the thrust reverser.

8. The thrust reverser of claim 7 , wherein the fixed structure is a beam.

9. The thrust reverser of claim 7 , wherein the fixed structure is one of a hinge beam or a latch beam.

10. The thrust reverser of claim 7 , wherein when the VAFN panel is in the open position, an engagement between the track and the slider of the track-and-slider system remains at or greater than fifty percent of the same engagement when the VAFN panel is in the closed position.

11. The thrust reverser of claim 1 , wherein the VAFN panel is configured to be in the closed position during a cruise condition of the aircraft.

12. A method of operating a thrust reverser of an aircraft comprising: translating a variable area fan nozzle (VAFN) panel in an aft direction relative to the aircraft from a closed position to an open position in which the open position of the VAFN panel
results in an increased cross-sectional area of a fan bypass nozzle,
wherein the VAFN panel conceals a plurality of blocker doors of the thrust reverser from a fan bypass duct;

further translating the VAFN panel in the aft direction from its open position to a reverse thrust position; and
translating in the aft direction a translating sleeve from a stowed position to a deployed position simultaneous to or following the translation of the VAFN panel to its reverse thrust position,
the translating sleeve in the deployed position causing air to be redirected from the fan bypass duct to outside of the thrust reverser in a reverse thrust direction;

wherein, when the VAFN panel is in the closed position, a leading edge of the VAFN panel lies in close proximity to a bull nose of the thrust reverser and
wherein the translating sleeve moves relative to the VAFN panel.

13. The method of claim 12 , further comprising: causing, by the translating sleeve, the air to be redirected from the fan bypass duct by deploying the blocker doors from a second stowed position to a second deployed position in which the blocker doors are at least partially located in and blocking the fan bypass duct.

14. The method of claim 13 , further comprising:
causing, by the translating sleeve, the air to be redirected from the fan bypass duct to outside of the thrust reverser in a reverse thrust direction by passing the air through an array of cascades.

15. The method of claim 13 , wherein the blocker doors are pivotally mounted to the translating sleeve.

16. The thrust reverser of claim 1 , wherein the blocker door is pivotally mounted to the translating sleeve.

17. A thrust reverser of an aircraft comprising: a bullnose;
a translating structure configured to translate along a centerline between a first position and a second position;
a blocker door pivotally mounted to the translating structure for movement between a stowed position and a deployed position in which the blocker door redirects air in a bypass duct in a reverse thrust direction; and
a variable area fan nozzle panel configured to translate along the centerline between a closed position and an open position, wherein the variable area fan nozzle panel lies in close proximity to the bull nose in the closed position,
and the variable area fan nozzle panel increases in the nozzle cross-sectional area of the bypass duct in the open position;

wherein the variable area fan nozzle panel is configured to conceal the translating structure from the bypass duct when the variable area fan nozzle panel is in the closed position;
wherein the variable area fan nozzle panel is configured to conceal the blocker door from the bypass duct when the variable area fan nozzle panel is in the closed position; and
wherein the translating structure is configured to move relative to the variable area fan nozzle panel.

18. The thrust reverser of claim 17 , further comprising a set of cascades, wherein the translating structure comprises a translating sleeve configured to selectively expose and conceal the cascades.

Assignees

• Rohr Inc

Inventors

• Gormley Timothy

Classifications

• F02K1/72 Primary

  the aft end of the fan housing being movable to uncover openings in the fan housing for the reversed flow · CPC title

• F02K1/09

  by axially moving an external member, e.g. a shroud (F02K1/12 takes precedence) · CPC title