Holding structure of fan blade

F - Mech Eng,Light,Heat,Weapons – 04 – D

Patent

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Details

F04D 29/34 (2006.01) F01D 5/30 (2006.01) F02K 3/06 (2006.01)

Patent

CA 2637277

A disk (10) comprises a plurality of dovetail grooves (12) spaced at angular intervals in the circumferential direction and extending in the axial direction. A fan blade (20) has a dovetail part (22) axially fitted into each of the dovetail grooves and capable of transmitting a centrifugal force produced during rotation to the disk. The disk includes a flange part (14) positioned forward of the dovetail grooves and extending in the radial outer direction and further includes a ring-like retainer member (30) which is fitted between the front faces (22a) of the dovetail parts (22) and the rear face (16a) of the flange part (14) and transmits an axial forward load acting on the fan blades (20) to the disk (10) through the rear face (16a) of the flange part.

Selon l'invention, un disque (10) comprend une pluralité de rainures à queue d'aronde (12) espacées à intervalles angulaires dans le sens circonférentiel et s'étendant dans le sens axial. Une pale (20) de ventilateur comprend une partie en queue d'aronde (22) ajustée axialement dans chacune des rainures à queue d'aronde et capable de transmettre au disque une force centrifuge produite au cours de la rotation. Le disque comprend une collerette (14) placée à l'avant des rainures à queue d'aronde et s'étendant dans le sens extérieur radial et il comprend par ailleurs un élément de retenue (30) de type bague qui est placé entre les faces frontales (22a) des parties en queue d'aronde (22) et la face arrière (16a) de la collerette (14) et transmet au disque (10) une charge avant axiale agissant sur les pales (20) du ventilateur à travers la face arrière (16a) de la collerette.

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