Thrust reverser comprising pivoting doors and a sliding rear shell ring
A thrust reverser including doors, a rear shell ring and an actuation system for synchronising the pivoting of the doors and the translation of the rear shell ring.
1 . A thrust reverser for an aircraft propulsion unit, comprising a fixed structure, a door, a ring forming a trailing edge and intended to be traversed by a fluid flow when the reverser is in a direct thrust configuration, an actuation system configured to simultaneously pivot the door between a closed direct thrust position and an open reverse thrust position and translate the ring between a forward position and a retracted position in relation to the fixed structure, and a guiding device for guiding the ring between the forward and retracted positions, the actuation system comprising:
an actuator provided with a movable drive element,
a first tie rod having a first end connected to the movable element of the actuator and a second end connected to the door,
a second tie rod having a first end connected to the movable element of the actuator and a second end connected to the ring,
wherein an entirety of the ring has an annular shape,
wherein the second end of the second tie rod is directly connected to the annular ring, and
wherein in the forward position, an entirety of the annular ring is positioned downstream from the first tie rod with respect to a direction of the fluid flow.
2 . The thrust reverser according to claim 1 , wherein the fixed structure comprises two longitudinal girders, the door extending circumferentially between these girders when it is in the closed position.
3 . The thrust reverser according to claim 2 , wherein the actuator is mounted on one of the girders.
4 . The thrust reverser according to claim 2 , wherein the girders comprise a rear end whereon the ring bears when the ring is in the forward position.
5 . The thrust reverser according to claim 1 , wherein the guiding device comprise bars rigidly connected to the ring and bearings borne by the fixed structure, the bars being configured to slide in the bearings when the ring is moved between the forward and retracted positions.
6 . The thrust reverser according to claim 1 , wherein the door comprises a rear end defining a parabolic shaped opening intended to conform with an internal structure of the propulsion unit when the door is in the open position, the reverser comprising a fairing element rigidly connected to the ring and having a complementary shape to that of said opening so as to seal between the door and the fairing element when the door is in the closed position.
7 . The thrust reverser according to claim 1 , wherein the movable element of the actuator comprises a carriage, the first end of the first tie rod and the first end of the second tie rod being connected to the carriage.
8 . The thrust reverser according to claim 1 , wherein the door comprises a locking pin configured to extend facing a stop surface formed by the ring or by a member rigidly connected to the ring when the door is in the closed position so as to prevent a translation of the ring to the retracted position.
9 . The aircraft propulsion unit, comprising the thrust reverser according to claim 1 .
10 . The propulsion unit according to claim 9 , comprising an internal structure, the internal structure being an exhaust cone.