Hub for radial housing of a helical ring of a turbomachine with variable-pitch blades and assembly comprising such a hub

摘要

A helical ring including a polygonal body and a plurality of cylindrical radial housings arranged in the body is provided. Each housing includes a surface adapted to receive a support of a blade of a helix. The surface of each housing is arranged on a radially internal surface of a corresponding hub. Each hub is a separate piece attached to the body of the ring, intended to be received in a radial housing of the body of the ring. The hub includes two projecting pins relative to its external surface to be fastened to the edges of a housing of the annular body, the two projecting pins forming a centering axis.

主权项

1. A hub for a radial housing of a helical ring of a turbomachine with variable-pitch blades, said ring comprising an annular rotor body and a plurality of radial housings distributed over said annular rotor body around a central axis, said hub comprising:
a piece separate from the annular rotor body, configured to be received in the radial housing of the annular rotor body, an internal surface of said piece being adapted to receive a cylindrical blade support crown and at least one of centering or guiding means for rotation of the cylindrical blade support crown; and two pins projecting relative to an external surface of the hub to fasten said external surface to edges of the radial housing of the annular rotor body, the two projecting pins forming a centering axis, wherein said internal surface comprises a machined area adapted to receive bearing rings of the cylindrical blade support crown, and wherein the hub further comprises two rims adapted to be supported on the edges of the radial housing when the pins are in place on the edges of the radial housing.