Hybrid pivot door thrust reversers

Patent metadata

Field	Value
Publication number	US-10954888-B2
Application number	US-201815941357-A
Country	US
Kind code	B2
Filing date	Mar 30, 2018
Priority date	Mar 30, 2018
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A thrust reverser is disclosed. The thrust reverser includes a frame, a first reverser door pivotally mounted to the frame, a second reverser door pivotally mounted to the frame and a hybrid exhaust duct. A first trailing edge of the first reverser door forms a portion of an exit plane of the thrust reverser and a second trailing edge of the second reverser door merges into the hybrid exhaust duct.

First claim

What is claimed is:

1. A thrust reverser, comprising:
a frame;
a first reverser door pivotally mounted to the frame and having a first trailing edge;
a second reverser door pivotally mounted to the frame and having a second trailing edge;
an attachment flange connected to the frame; and
a hybrid exhaust duct,
wherein the first trailing edge provides a portion of an exit plane of the thrust reverser and the second trailing edge provides a transition portion that merges into the hybrid exhaust duct,
wherein the thrust reverser defines a central axis and the hybrid exhaust duct includes a pre-exit portion that extends circumferentially about the central axis from a first termination point to a second termination point,
wherein the first termination point and the second termination point define a post-exit portion of the hybrid exhaust duct and wherein the first reverser door includes a first outer surface having a first outer surface portion configured to reside in the post-exit portion when the thrust reverser assumes a stowed position, and
wherein the first outer surface defines a first length from the attachment flange to the exit plane, wherein the second reverser door includes a second outer surface that defines a second length from the attachment flange to the pre-exit portion of the hybrid exhaust duct and wherein the first length is greater than the second length.

2. The thrust reverser of claim 1 , wherein the pre-exit portion of the hybrid exhaust duct includes a third outer surface opposite the first outer surface, wherein the third outer surface has a third length and wherein a sum of the second length and the third length is equal to the first length.

3. The thrust reverser of claim 1 , wherein the post-exit portion of the hybrid exhaust duct defines an angular section having an origin positioned on the central axis and wherein the angular section defines an arc within a range from one-hundred-twenty degrees (120°) to sixty degrees (60°).

4. The thrust reverser of claim 3 , wherein the second length is greater than or equal to eighty percent (80%) and less than or equal to ninety percent (90%) of the first length.

5. The thrust reverser of claim 1 , wherein the first reverser door is pivotally mounted to the frame on a first hinge line, wherein the second reverser door is pivotally mounted to the frame on a second hinge line and wherein the first hinge line is located aft of the second hinge line.

6. The thrust reverser of claim 5 , wherein the first hinge line is oriented substantially perpendicular to the central axis and spaced a first offset distance from the central axis, wherein the second hinge line is oriented substantially perpendicular to the central axis and spaced a second offset distance from the central axis and wherein the first offset distance is less than or equal to the second offset distance.

7. The thrust reverser of claim 6 , wherein the first offset distance is greater than or equal to 5% and less than or equal to 15% of the first length and wherein the second offset distance is greater than or equal to 5% and less than or equal to 15% of the first length.

8. A hybrid thrust reverser, comprising:
a frame;
a pair of opposing side beams;
a first reverser door pivotally mounted to the frame and having a first trailing edge;
a second reverser door pivotally mounted to the frame and having a second trailing edge;
an attachment flange connected to the frame; and
a hybrid exhaust duct,
wherein the first trailing edge provides a portion of an exit plane of the hybrid thrust reverser and the second trailing edge provides a transition portion that merges into the hybrid exhaust duct,
wherein the hybrid thrust reverser defines a central axis and the hybrid exhaust duct includes a pre-exit portion extending circumferentially about the central axis from a first termination point to a second termination point,
wherein the first termination point and the second termination point define a post-exit portion of the hybrid exhaust duct and the first reverser door includes a first outer surface having a first outer surface portion configured to reside in the post-exit portion when the hybrid thrust reverser assumes a stowed position, and
wherein the first outer surface defines a first length from the attachment flange to the exit plane, the second reverser door includes a second outer surface that defines a second length from the attachment flange to the pre-exit portion of the hybrid exhaust duct and the first length is greater than the second length.

9. The hybrid thrust reverser of claim 8 , wherein the post-exit portion of the hybrid thrust reverser includes an open portion defined by an angular section having an origin positioned on the central axis and wherein the angular section defines an arc within a range from one-hundred-twenty degrees (120°) to sixty degrees (60°).

10. The hybrid thrust reverser of claim 9 , wherein the pre-exit portion of the hybrid exhaust duct includes a circumferential portion of the hybrid exhaust duct that merges with the second reverser door when the hybrid thrust reverser assumes the stowed position.

11. The hybrid thrust reverser of claim 10 , wherein the first reverser door is pivotally mounted to the frame on a first hinge line, wherein the second reverser door is pivotally mounted to the frame on a second hinge line and wherein the first hinge line is located aft of the second hinge line.

12. The hybrid thrust reverser of claim 11 , wherein the first hinge line is oriented substantially perpendicular to the central axis and spaced a first offset distance from the central axis, wherein the second hinge line is oriented substantially perpendicular to the central axis and spaced a second offset distance from the central axis and wherein the first offset distance is less than or equal to the second offset distance.

13. A thrust reverser, comprising:
a pair of opposing side beams;
an upper reverser door pivotally mounted to the pair of opposing side beams and having an upper trailing edge;
a lower reverser door pivotally mounted to the pair of opposing side beams and having a lower trailing edge; and
a hybrid exhaust duct,
wherein the upper trailing edge provides a portion of an exit plane of the thrust reverser and the lower trailing edge provides a transition portion that merges into the hybrid exhaust duct,
wherein the hybrid exhaust duct includes a pre-exit portion that extends circumferentially, about a central axis extending through the thrust reverser, from a first termination point to a second termination point,
wherein the first termination point and the second termination point define a post-exit portion of the hybrid exhaust duct and the upper reverser door includes a first outer surface having a first outer surface portion configured to reside in the post-exit portion when the thrust reverser assumes a stowed position, and
wherein the first outer surface defines a first length from an attachment flange to the exit plane, the lower reverser door includes a second outer surface that defines a second length from the attachment flange to the pre-exit portion of the hybrid exhaust duct and the first length is greater than the second length.

14. The thrust reverser of claim 13 , wherein the upper reverser door is pivotally mounted to the pair of opposing side beams on a first hinge line, wherein the lower reverser door is pivotally mounted to the pair of opposing side beams on a second hinge line and wherein the first hinge line is located aft of the second hinge line.

15. The thrust reverser of claim 14 , wherein the first hinge line is

Assignees

• Rohr Inc

Inventors

• Lacko Anthony

Classifications

• F02K1/54

  Nozzles having means for reversing jet thrust (reversing jet thrust using fluid jets F02K1/32) · CPC title

• F02K1/70 Primary

  using thrust reverser flaps or doors mounted on the fan housing · CPC title

• F02K1/60 Primary

  by blocking the rearward discharge by means of pivoted eyelids or clamshells, e.g. target-type reversers · CPC title

• F02K1/62

  by blocking the rearward discharge by means of flaps · CPC title

• F05D2240/128

  Nozzles · CPC title