Patent ID: 6256980
Filing Date: 2001-07-10
Classification: F02K,Y02T

Abstract:
A thrust reverser for a bypass turbojet-engine comprising:a stationary structure defining an upstream part of a fan cowling;an axially displaceable, annular structure (7) located downstream of the stationary structure which forms a downstream external part of the fan cowling and a downstream part of a radial inner surface spaced from an outer surface of an engine cowling (16) therebetween so as to form an annular gas flow duct (17);a plurality of flaps (12) having a first edges and forming a portion of the inner surface of the displaceable structure (7) during a forward thrust position and a reverse thrust position wherein the flaps (12) pivotably rotate about a stationary pivot (15) wherein the first edges are connected to the outer surface of the engine cowling (16) so as to deflect a gas flow in the annular duct;a plurality cascade portions (20) supported by stationary structure (6) and covered by the flaps (12) during a forward thrust position and a reverse thrust position wherein the cascade portions are located between the movable cowling (7) and the stationary structure (6) such that the cascade portions redirect the gas flow deflected by the flaps into a reverse thrust direction;a stationary cascade portion (21) having a second edge rigidly connected to the stationary structure (6) and a first end downstream the stationary structure (6); andat least one movable cascade portion (22) having a second end and a movable with respect to the stationary cascade portion (21) between a forward thrust position wherein the second end is adjacent to the first end of stationary cascade portion (21) and a reverse thrust position wherein the second end is displaced downstream from the first end so that the plurality of cascade portions are radially offset and longitudinally juxtaposed, the at least one movable cascade portion located substantially parallel to the stationary cascade portion in both the forward and reverse thrust positions.