US 12,221,941 B2
Reverser with movable cascades for an aircraft propulsion assembly, comprising a system for limiting the buckling of an actuator of the reverser
Patrick André Boileau, Moissy-Cramayel (FR); and Fabien Jourdan, Moissy-Cramayel (FR)
Assigned to SAFRAN NACELLES, Gonfreville-l'Orcher (FR)
Appl. No. 18/685,731
Filed by SAFRAN NACELLES, Gonfreville-l'Orcher (FR)
PCT Filed Aug. 24, 2022, PCT No. PCT/FR2022/051607
§ 371(c)(1), (2) Date Feb. 22, 2024,
PCT Pub. No. WO2023/026014, PCT Pub. Date Mar. 2, 2023.
Claims priority of application No. 2108893 (FR), filed on Aug. 25, 2021.
Prior Publication US 2024/0344486 A1, Oct. 17, 2024
Int. Cl. F02K 1/76 (2006.01); F02K 1/72 (2006.01)
CPC F02K 1/763 (2013.01) [F02K 1/72 (2013.01); F05D 2220/323 (2013.01); F05D 2240/129 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A thrust reverser for an aircraft propulsion unit, the reverser having a longitudinal central axis and comprising:
a fixed structure;
a movable system, the movable system comprising a reverser cowl and a set of cascade vanes comprising a plurality of cascade vanes;
an actuator equipped with a fixed portion and a portion movable relative to the fixed portion, so as to be able to move the movable system in translation relative to the fixed structure of the reverser according to the longitudinal central axis, between an advanced direct thrust position and a backward thrust reversal position, the actuator being a hydraulic or electric actuator,
wherein the movable system also includes an inter-cascade structure for limiting buckling of the actuator, the inter-cascade structure being interposed between two directly consecutive cascade vanes of the plurality of cascade vanes and forming a channel crossed by the actuator, the channel being delimited by a cylindrical internal surface extending circumferentially along at least one portion of a first closed directrix curve,
wherein the fixed portion of the actuator passes through the channel and comprises an outlet end of the movable portion, said outlet end being equipped with an external ring for limiting buckling of the actuator, the external ring having a cylindrical external surface extending circumferentially along at least one portion of a second closed directrix curve,
wherein the external ring is arranged around the outlet end, and
wherein in the backward thrust reversal position, the external ring is surrounded by the cylindrical internal surface delimiting the channel.