Double-wall blade for a turbine, particularly for...

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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F01D 5/18 (2006.01) F01D 9/04 (2006.01) F01D 17/16 (2006.01)

Patent

CA 2393979

A double-wall blade for a turbine, particularly for aeronautical applications, has a streamlined lateral wall, which extends along an axis, surrounds the axis itself, and is defined by an inner wall and an outer wall facing and integral with each other; the blade is provided with inner channelling, which has a cavity into which, in use, cooling air is admitted, and a number of ducts, which are provided tangentially between the inner wall and outer wall, are separated from one another by baffles which are transverse to the axis and have respective intakes which are separate from one another and communicate with the cavity in order, in use, each to have a corresponding flow of cooling air pass through them.

L'invention concerne une aube de turbine à double paroi, surtout utilisée en aéronautique, qui comporte une paroi latérale profilée, qui s'étend le long d'un axe, s'enroule sur l'axe et est définie par une paroi interne et une paroi externe en vis-à-vis; l'aube est pourvue d'une canalisation interne, qui comporte une cavité dans laquelle de l'air de refroidissement est admis durant le fonctionne, et un certain nombre de tuyaux qui sont placés tangentiellement entre la paroi interne et la paroi externe, sont séparés les uns des autres par des écrans qui ont une position tranversale par rapport à l'axe et qui ont des entrées respectives séparées les unes des autres et communiquant avec la cavité. Ainsi, durant le fonctionnement, chacun des tuyaux est traversé par un écoulement correspondant d'air de refroidissement.

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