Control of the axial position of a fan blade

Details Control of the axial position of a fan blade Control of the axial position of a fan blade

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/30 (2006.01) F04D 29/32 (2006.01)

Patent

CA 2440995

The invention concerns a fan rotor comprising a disk (2) having a rim with a plurality of substantially axial grooves that are regularly spaced apart angularly, a plurality of removable blades (3) extending radially outwards from the periphery of said disk (2), each blade (3) having a blade root (4) received in a respective groove, a downstream flange plate secured to said disk (2) and against which the downstream faces of the blade roots are in abutment, and a removable upstream flange plate (12) secured to said disk (2) for the purpose of retaining the blade roots (4) in the grooves (5). The said rotor is characterized by the fact that the upstream flange plate (12) is fitted on its downstream face with resilient means for exerting sufficient force on the upstream faces of the blade roots, after assembly, to prevent any axial displacement of the blades during normal operation of the engine (barring exceptional events such as foreign object ingestion or blade loss).

L'invention concerne un rotor de soufflante comportant un disque (2) dont la jante présente une pluralité de rainures sensiblement axiales et régulièrement réparties angulairement, une pluralité d'aubes (3) amovibles qui s'étendent radialement vers l'extérieur à la périphérie dudit disque (2), chaque aube (3) comportant un pied d'aube (4) logeant dans une rainure, un flasque aval solidaire dudit disque (2) et contre lequel les faces aval des pieds d'aube sont en butée, et un flasque amont (12) amovible solidaire dudit disque (2) et destiné à retenir les pieds d'aube (4) dans les rainures (5). Ce rotor est caractérisé par le fait que le flasque amont (12) est équipé sur sa face aval de moyens élastiques destinés à exercer sur les faces amont des pieds d'aube, après montage, des efforts suffisants pour empêcher tout déplacement axial des aubes, lors du fonctionnement normal du moteur (hors évènements exceptionnels type ingestion de corps étrangers ou perte d'aubes).

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