Variable nozzle for a gas turbine

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

Patent

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Details

F01D 17/16 (2006.01) F01D 5/14 (2006.01)

Patent

CA 2548535

Variable nozzle (10) for a gas turbine fixed to a shaft (11) equipped with a pressurized upper surface (12) and a depressurized lower surface opposite to the upper surface (12), the variable nozzle comprises a series of substantially "C"-shaped sections, each having a first rounded end and a second rounded end each sec~tion of the series of sections also having the concavity facing upwards with respect to a base (90) and arranged one after another continuously, in the direction of an axis of the shaft (11) along a curved line (60), the at least second degree curved line (60) lies on a surface (70) having an axis orthogonal to the axis of the shaft (11) and also tilted with respect to the base (90) by an angle (80).

L'invention concerne une tuyère variable (10) destinée à une turbine à gaz fixée sur un arbre (11) équipé d'une surface supérieure sous pression (12) et d'une surface inférieure dépressurisée, opposée à la surface supérieure (12), la tuyère variable comprenant un ensemble de sections en forme sensible de "C" présentant individuellement une première extrémité arrondie et une seconde extrémité arrondie et chaque section de l'ensemble de sections comprenant également une concavité opposée vers le haut à une base (90) et disposée une après l'autre en continu, dans le sens d'un axe de l'arbre (11), le long d'une ligne incurvée (60), au moins une ligne incurvée à un second degré (60) se trouvant sur une surface (70) possédant un axe orthogonal par rapport à l'axe de l'arbre (11) et également incliné par rapport à la base (90) d'un angle défini (80).

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