Variable cam exhaust nozzle

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 13/00 (2006.01)

Patent

CA 2536802

An exhaust nozzle (38) includes an exhaust duct (36) with an outlet (46) and a row of radial apertures (48) upstream therefrom. A radial frame (58) surrounds the duct (36) upstream from the apertures (48). A row of flaps (56) are hinged to the frame (58) to selectively cover and uncover the apertures (48) for controlling exhaust flow discharged therethrough. An arcuate unison bar (66) surrounds the duct (36) adjacent to the frame (58) and includes circumferentially spaced apart cam followers (68) engaging corresponding cams (64) affixed to the flaps. An actuator (70) is joined to the bar (66) for selective rotation thereof between opposite first and second directions to pivot open and closed the flaps atop the apertures (48).

L'invention concerne une tuyère d'échappement (38) comprenant un canal d'échappement (36) avec une sortie (46) et une rangée d'ouvertures radiales (48) en amont de la sortie (46). Une structure radiale (58) entoure le canal d'éjection (36) en amont des ouvertures (48). Une rangée de volets (56) sont fixés de manière articulée à la structure radiale (58) de manière à sélectivement recouvrir ou découvrir les ouvertures (48) et réguler le flux d'échappement. Une barre arquée (66) entourant le canal d'échappement (36) à proximité de la structure radiale comprend des galets de came (68) espacés sur la circonférence de la tuyère et entrant en prise avec des cames (64) correspondantes reliées aux volets. Un vérin (70) couplé à la barre (66) permet de faire pivoter sélectivement les volets dans une premier direction et dans une seconde direction opposée pour ouvrir et fermer les ouvertures (48).

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