High temperature airfoil

Details High temperature airfoil High temperature airfoil

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/08 (2006.01) F01D 5/18 (2006.01) F01D 5/28 (2006.01) F01D 5/30 (2006.01)

Patent

CA 2336883

A high temperature repairable airfoil (30) having a plurality of flow path cover tiles (45a-d) coupled to a single crystal spar member (44). In one embodiment, the plurality of flow path cover tiles (45a-d) include an attachment portion (47) that is received within a groove (46) formed in the outer surface of the spar. The attachment portion (47) slides into a retaining feature (49) within the groove (46) so as to limit movement of the plurality of flow path cover tiles (45). Upon rotation of the airfoil (30), the plurality of flow path cover tiles (45) become centrifugally loaded with a portion of the spar member (44). In one embodiment, the plurality of flow path cover tiles (45a) are formed of a material selected from the group consisting of ceramics, intermetallic, and thermal barrier coated single crystal alloy material.

Cette invention se rapporte à un profil d'aile réparable haute température (30) comprenant plusieurs carreaux de revêtement (45a-d) acheminant le flux, couplés à un longeron à structure monocristalline (44). Dans un mode de réalisation, les carreaux de revêtement (45a-d) acheminant le flux comportent une partie de fixation (47) qui vient se loger dans une rainure (46) formée dans la surface externe du longeron. Cette partie de fixation (47) coulisse dans un moyen de retenue (49) situé dans la rainure (46), afin de limiter le mouvement des carreaux de revêtement (45) acheminant le flux. Lors de la rotation du profil d'aile (30), les carreaux de revêtement (45) acheminant le flux se chargent par la force centrifuge d'une partie du longeron (44). Dans un mode de réalisation, les carreaux de revêtement (45a) sont fabriqués dans un matériau choisi dans le groupe des céramiques, des composés intermétalliques et des matériaux en alliage monocristallin recouvert d'une barrière thermique.

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