SYSTEM FOR LOCKING A BLADE OF A FAN MODULE BY AN ELASTIC PRELOAD MEMBER

Abstract

The invention relates to a module, in particular for an aircraft turbomachine test bench, comprising a system (17) for locking in rotation a blade (11) comprising: - a clamping flange (18), - an elastic preloading member (20), and - a push screw (21) bearing against the clamping flange (18), such that when the push screw (21) is tightened, the elastic preloading member (20) is compressed by the clamping flange (18) so as to release rotation of the blade 11 to select a desired angular position, and when the push screw (21) is loosened, the decompressed elastic preloading member (20) urges the clamping flange (18) against the end face of the blade root (13) such that the blade root (13) bearing against the annular hub (10) is immobilized in the desired angular position. Figure 3a

Claims

(13) and the clamping flange (18).

7. Module according to any one of claims 1 to 6, characterized in that knurling is produced on a surface of the clamping flange (18) and / or on a surface of the blade root (13).

8. Module according to any one of claims 1 to 7, characterized in that an end portion (28) of the clamping flange (17) against which the push screw (21) bears is arranged inside a cavity (29) of the annular hub (10) located in an extension of the blade root housing (12).

9. Module according to any one of claims 1 to 8, characterized in that a head of the push screw (21) is flush with a vein of the module to avoid aerodynamic disturbances.

10. Module according to any one of claims 1 to 9, characterized in that the annular hub (10) is made in two parts.

11. Module according to any one of claims 1 to 9, characterized in that the annular hub (10) is in one piece.

12. Module according to any one of claims 1 to 11, characterized in that the module is a rectifier module (5).

13. Module according to any one of claims 1 to 11, characterized in that the module is a rotor module. [Fig. 1] [Fig. 3a]