The invention relates to a turbofan engine (100) having a nacelle (102) and a flow path (204), where the nacelle comprises: a movable cowl (216) enabling defining a window (220) between the flow path and the outside; a yarn membrane (252) having a first edge fixed to the movable fairing and alternately assuming a folded position or a deployed position across the flow path (204); and a pneumatic system (350) that displaces the second edge of the yarn film from the folded position to the unfolded position, and vice versa. The pneumatic system (350) comprises: a rigid main roller (352); at least one stretchable secondary roller (354) for each yarn film (252), the secondary roller being fixed to a second edge of the yarn film (252); and a pressurization and decompression system that alternately generates or decompresses pressure in each secondary roller (354). The replacement of the reverse door and its drive mechanism with a flexible gauze membrane and a pneumatic system allows weight reduction.

    本发明涉及具有短舱(102)和流动路径(204)的涡轮风扇发动机(100),其中,短舱包括:可动整流罩(216),其使得能够在流动路径与外部之间限定窗口(220);纱膜(252),该纱膜具有第一边缘,该第一边缘固定到可动整流罩并且交替地呈现折叠位置或横跨流动路径(204)的展开位置;以及气动系统(350),该气动系统将纱膜的第二边缘从折叠位置移位到展开位置,反之亦然。气动系统(350)包括:刚性主辊子(352);对于每张纱膜(252)至少一个可伸展的副辊子(354),该副辊子固定到所述纱膜(252)的第二边缘;以及加压和减压系统,该加压和减压系统交替地在每个副辊子(354)中产生压力或减压。用柔性纱膜和气动系统代替反向门及其驱动机构允许减轻重量。


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    Titel :

    Turbofan engine including system for blocking bypass flow flow path having yarn film


    Weitere Titelangaben:

    包括具有纱膜的用于阻塞旁路流流动路径的系统的涡轮风扇发动机


    Beteiligte:
    PORTER ADAM (Autor:in) / CHAPRA LAKSHMI (Autor:in) / TOUBERT BRIGITTE (Autor:in)

    Erscheinungsdatum :

    2022-07-22


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    F02K JET-PROPULSION PLANTS , Strahltriebwerke / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F02C Gasturbinenanlagen , GAS-TURBINE PLANTS



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