HUB FOR PROPELLER WITH POLYGONAL REINFORCED RING AND TURBOMACHINE EQUIPPED BY SUCH HUB Russian patent published in 2015 - IPC F01D7/00 F04D29/36 B64C11/06 

FIELD: machine building.

SUBSTANCE: propeller hub with blades with adjustable installation angle for a turbomachine comprises a polygonal ring to hold the blades and a connection unit coupling the polygonal ring with the turbine rotor element of the turbomachine. The polygonal ring is concentrical to the longitudinal axis of the turbomachine and includes two end face ring edges. The said edges are distanced parallel to each other and are diametrically rigidly connected by fastening zones outgoing from the said edges, with rings with cylindrical radial seats for blade installation. The rings are set at similar angular distance at side periphery of the polygonal ring and are separated from each other by intermediate zones. The intermediate zones are placed between two sequential rings and end face ring edges and comprise reinforcing ring elements set radially and/or tangentially and rigidly fixed to the side walls of two sequential rings. The other invention of the group refers to a turbomachine with an open fan comprising the above hub of a fan propeller.

EFFECT: group of inventions allows for the prevention of deformation of cylindrical seats for fan blades.

12 cl, 8 dwg