Nozzle flap for aircraft turbojets

F - Mech Eng,Light,Heat,Weapons – 02 – K

Patent

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F02K 1/12 (2006.01) F02K 1/00 (2006.01)

Patent

CA 2467842

The invention proposes a long life nozzle flap for aircraft turbojets. This flap is remarkable in that it is composed of a hollow tapered body flattened in the transverse direction along straight geometric generating lines, the body forming a thin wall with an approximately constant thickness E, this wall comprising a continuous inner surface with a radius of curvature equal to at least 2xE, the wall being made of a refractory composite material composed of reinforcing fibres embedded in a matrix also made from a refractory material, the reinforcing fibres being arranged in a plurality of continuous layers of fibres stacked on each other, the fibres of a layer crossing the fibres of any adjacent layer.

L'invention concerne un volet de tuyère longue durée pour turboréacteurs d'aéronef. Ce volet est remarquable parce qu'il est composé d'un corps conique creux aplati dans le sens transversal selon des lignes de génération géométriques droites, le corps forme une paroi mince avec une épaisseur à peu près constante, cette paroi comprend une surface intérieure continue avec un rayon de courbure égal à au moins 2xE, la paroi est fabriquée d'un matériau composite réfractaire composé de fibres de renfort intégrées dans une matrice fabriquée également d'un matériau réfractaire, les fibres de renfort sont disposées dans une pluralité de couches continues de fibres empilées les unes sur les autres. Les fibres d'une couche traversent les fibres de toute couche adjacente.

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