초록 ▼

A thrust reverser able to accommodate the convergent shape of the nacelle used on an ultrahigh bypass fan engine. The thrust reverser includes a plurality of tapered cascaded vane sections (84/132) that are connected to an aft edge of an annular ring (82), which is disposed at the rear of a fixed po

A thrust reverser able to accommodate the convergent shape of the nacelle used on an ultrahigh bypass fan engine. The thrust reverser includes a plurality of tapered cascaded vane sections (84/132) that are connected to an aft edge of an annular ring (82), which is disposed at the rear of a fixed portion of a nacelle (66) surrounding an engine core (62). An aft portion (70) of the nacelle includes a plurality of pockets (96/152) in which the cascaded vane sections are stowed during operation of the engine in a forward thrust mode. Linear actuators (98) translate the aft portion rearwardly, exposing the cascaded vane sections and deploying a plurality of blocker panels (94/136), for operation of the engine in a reverse thrust mode. In a first embodiment, the cascaded vane sections (84) are pivotally connected to the annular ring and the blocker panels are connected with telescoping links (104) to the annular ring. In a second embodiment, the cascaded vane sections (132) are fixed to the annular ring, and the blocker panels are pivotally connected by a fixed length link (138) to the outer surface of the engine core.

대표청구항 ▼

A thrust reverser for a bypass fan jet engine having a core, an annular cowling supported concentrically about at least a portion of the core, an annular duct being defined between the core and the cowling, an aft section of the cowling defining a nozzle for the duct, the aft section including an in

A thrust reverser for a bypass fan jet engine having a core, an annular cowling supported concentrically about at least a portion of the core, an annular duct being defined between the core and the cowling, an aft section of the cowling defining a nozzle for the duct, the aft section including an inner and an outer surface that converge toward a trailing edge, and a fan extending radially beyond the circumference of the core an producing airflow through the duct when driven by the engine, said thrust reverser comprising (a) a plurality of spaced apart, radially extending panels disposed between inner and outer surface of the aft section, defining a plurality of pockets, each pocket be open on its forward end and extending toward the trailing edge; (b) a plurality of linear actuators connected between a forward fixed portion of the cowling and the aft section of the cowling and operative to translate the aft section rearwardly from a position in which it is adjacent the fixed portion of the cowling in a forward thrust mode, to a displaced position in a reverse thrust mode, creating an opening between the fixed portion and the aft section of the cowling; (c) a plurality of spaced apart cascaded vane sections attached in cantilever fashion to the fixed portion of the cowling, edges of adjacent cascaded vane sections defining longitudinal slots therebetween, each of said cascaded vane sections extending into one of the pockets disposed in the aft section of the cowling in the forward thrust mode, a plurality of vanes comprising each cascaded vane section being curved to deflect airflow radially outwardly through the opening in a forward direction, when exposed in the reverse thrust mode; (d) a plurality of blocker panels disposed in spaced apart array around the inner circumference of the aft section of the cowling and pivotally connected at one end to the radially extending panels in the aft section; and (e) a plurality of links, one end of each link being pivotally connected to one of the blocker panels and the other end to one of the fixed section and the core, said links being operative to draw the blocker panels inwardly across the duct as the actuators translate the aft section to its full rearward extension, so that in the reverse thrust mode, airflow is thereby blocked from flowing through the duct nozzle and is instead forced to flow outwardly through the exposed cascaded vane sections.