System including hidden drag link assembly for actuating blocker door of thrust reverser
View Patent ↗A system for actuating a blocker door of a thrust reverser, in which a drag link assembly is removed from the airflow through the engine during flight. The assembly couples the door to a sleeve so that translation of the sleeve between deployed and stowed positions moves the door to open and closed positions, respectively. The assembly includes a drag link track having a channel extending between first and second track ends, and a drag link having a link end which is slidable in the track channel between the first and second track ends. During deployment, translation of the sleeve causes the second link end to slide within the channel toward the second track end which causes the door to open, and during stowage, translation of the sleeve causes the second link end to slide within the channel toward the first track end which causes the door to close.
1. A system for actuating a blocker door of a thrust reverser, the system comprising:
a sleeve translatable between a stowed position in which an engine airflow is directed rearwardly and a deployed position in which the engine airflow is redirected forwardly;
a blocker door moveable between a closed position associated with the stowed position of the sleeve in which the engine airflow is directed rearwardly and an open position associated with the deployed position of the sleeve in which the engine airflow is redirected laterally by the blocker door;
a drag link assembly located between the sleeve and the blocker door and configured to mechanically couple the sleeve to the blocker door so that translation of the sleeve to the deployed position moves the blocker door to the open position and translation of the sleeve to the stowed position moves the blocker door to the closed position, the drag link assembly including—
a drag link track including a first track end, a second track end, and an elongated channel extending between the first and second track ends, and
a drag link including a first link end and a second link end, with the second link end being slidably received in the elongated channel of the drag link track and moveable within the elongated channel between the first track end and the second track end,
wherein during deployment of the thrust reverser, the sleeve is translated aft to the deployed position, and the second link end slides within the elongated channel toward the second track end which causes the blocker door to move to the open position, and
wherein during stowage of the thrust reverser, the sleeve is translated forward to the stowed position, and the second link end of the drag link slides within the elongated channel toward the first track end which causes the blocker door to move to the closed position in which the drag link assembly is not exposed to the engine airflow; and
a seal provided on a leading edge of the sleeve, wherein the seal is configured to seal a space in which the drag link assembly is located between the sleeve and the blocker door from the engine airflow when the sleeve is in the stowed position and the blocker door is in the closed position, and wherein the seal includes a channel through which a portion of the drag link assembly passes when the sleeve is in the deployed position and the blocker door is in the open position.
2. The system of claim 1 , wherein—
the drag link track is mounted to the sleeve such that the drag link track moves with the sleeve; and
the drag link is rotatably connected to the blocker door.
3. The system of claim 1 , wherein—
the drag link track is mounted to the blocker door; and
the drag link is rotatably connected to the sleeve such that the drag link moves with the sleeve.
4. The system of claim 1 , wherein the elongated channel proximate to the second track end is curved.
5. The system of claim 1 , wherein the first and second track ends are offset and connected by a laterally extending intermediate section of the elongated channel.
6. The system of claim 1 , wherein at least one of the first and second link ends include a friction-reducing element.
7. The system of claim 1 , further including a locking element located at the second track end of the elongated channel of the drag link track and configured to engage and retain the second link end when the blocker door is in the open position.
8. The system of claim 1 , further including a bumper element extending between the sleeve and the blocker door when the sleeve is in the stowed position and the blocker door is in the closed position.
9. The system of claim 8 , wherein the bumper element extends between at least one of the sleeve or the blocker door and the drag link assembly mounted to at least one of the sleeve or the blocker door.
10. A system for actuating a blocker door of a translating sleeve thrust reverser, the system comprising:
a sleeve including a cascade of elements, the sleeve being translatable between a stowed position in which an engine airflow is directed rearwardly and a deployed position in which the engine airflow is redirected forwardly by the cascade of elements;
a blocker door moveable between a closed position associated with the stowed position of the sleeve in which the engine airflow is directed rearwardly and an open position associated with the deployed position of the sleeve in which the engine airflow is redirected laterally by the blocker door toward the cascade of elements;
a drag link assembly including—
a drag link track mounted to the sleeve such that the drag link track moves with the sleeve during translation of the sleeve, the drag link track including a first track end, a second track end, and an elongated channel extending between the first and second track ends,
a drag link including a first link end and a second link end, with the first link end being rotatably connected to the blocker door, and the second link end being slidably received in the elongated channel of the drag link track and moveable within the elongated channel between the first track end and the second track end,
wherein during deployment of the translating sleeve thrust reverser, the sleeve is translated aft to the deployed position, and the drag link track mounted to the sleeve moves with the sleeve, such that the second link end slides within the elongated channel toward the second track end which causes the blocker door to move to the open position, and
wherein during stowage of the translating sleeve thrust reverser, the sleeve is translated forward to the stowed position, and the drag link track mounted to the sleeve moves with the sleeve, such that the second link end of the drag link slides within the elongated channel toward the first track end which causes the blocker door to move to the closed position in which the drag link assembly is not exposed to the engine airflow; and
a seal provided on a leading edge of the sleeve, wherein the seal is configured to seal a space in which the drag link assembly is located between the sleeve and the blocker door from the engine airflow when the sleeve is in the stowed position and the blocker door is in the closed position, and wherein the seal includes a channel through which a portion of the drag link assembly passes when the sleeve is in the deployed position and the blocker door is in the open position.
11. The system of claim 10 , wherein the elongated channel proximate to the second track end is curved.
12. The system of claim 10 , further including a locking element located at the second track end of the elongated channel of the drag link track and configured to engage and retain the second link end when the blocker door is in the open position.
13. The system of claim 10 , further including a bumper element extending between at least one of the sleeve or the blocker door and the drag link assembly mounted to at least one of the sleeve or the blocker door.
14. A system for actuating a blocker door of a translating sleeve thrust reverser, the system comprising:
a sleeve including a cascade of elements, the sleeve being translatable between a stowed position in which an engine airflow is directed rearwardly and a deployed position in which the engine airflow is redirected forwardly by the cascade of elements;
a blocker door moveable between a closed position associated with the stowed position of the sleeve in which the engine airflow is directed rearwardly and an open position associated with the deployed position of the sleeve in which the engine airflow is redirected laterally by the blocker door toward the cascade of elements;
a drag link assembly including—
a drag link track mounted to the blocker door, the drag link track including a first track end, a second track end, and an elongated channel extending between the first and second track ends, and
a drag link including a first link end and a second link end, with the first link end being rotatably connected to the sleeve such that the drag link moves with the sleeve during translation of the sleeve, and the second link end being slidably received in the elongated channel of the drag link track and moveable within the elongated channel between the first track end and the second track end,
wherein during deployment of the translating sleeve thrust reverser, the sleeve is translated aft to the deployed position, and the drag link mounted to the sleeve moves with the sleeve, such that the second link end slides within the elongated channel toward the second track end which causes the blocker door to move to the open position, and
wherein during stowage of the translating sleeve thrust reverser, the sleeve is translated forward to the stowed position, and the drag link mounted to the sleeve moves with the sleeve, such that the second link end of the drag link slides within the elongated channel toward the first track end which causes the blocker door to move to the closed position in which the drag link assembly is not exposed to the engine airflow; and
a seal provided on a leading edge of the sleeve, wherein the seal is configured to seal a space in which the drag link assembly is located between the sleeve and the blocker door from the engine airflow when the sleeve is in the stowed position and the blocker door is in the closed position, and wherein the seal includes a channel through which a portion of the drag link assembly passes when the sleeve is in the deployed position and the blocker door is in the open position.
15. The system of claim 14 , wherein the first and second track ends are offset and connected by a laterally extending intermediate section of the elongated channel.
16. The system of claim 14 , further including a locking element located at the second track end of the elongated channel of the drag link track and configured to engage and retain the second link end when the blocker door is in the open position.
17. The system of claim 14 , further including a bumper element extending between at least one of the sleeve or the blocker door and the drag link assembly mounted to at least one of the sleeve or the blocker door.