US 12,091,156 B2
Unducted fan having variable pitch blades comprising reduced disturbance platforms
Vincent Joudon, Moissy-Cramayel (FR); Vivien Mickaël Courtier, Moissy-Cramayel (FR); and Clément Pierre Postec, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/022,385
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Aug. 17, 2021, PCT No. PCT/FR2021/051471
§ 371(c)(1), (2) Date Feb. 21, 2023,
PCT Pub. No. WO2022/043631, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2008755 (FR), filed on Aug. 27, 2020.
Prior Publication US 2023/0348042 A1, Nov. 2, 2023
Int. Cl. B64C 11/26 (2006.01); B29C 70/48 (2006.01); B29C 70/50 (2006.01); B64C 11/02 (2006.01); B64C 11/04 (2006.01); B64C 11/06 (2006.01); B64C 11/16 (2006.01); B64C 11/20 (2006.01); B64C 27/26 (2006.01); B64C 27/467 (2006.01); F03D 1/00 (2006.01); F03D 1/06 (2006.01)
CPC B64C 11/26 (2013.01) [B29C 70/48 (2013.01); B64C 11/06 (2013.01); F03D 1/0675 (2013.01); B29C 70/50 (2013.01); B64C 11/02 (2013.01); B64C 11/04 (2013.01); B64C 11/16 (2013.01); B64C 11/20 (2013.01); B64C 27/26 (2013.01); B64C 27/467 (2013.01); F03D 1/0658 (2013.01); F03D 1/101 (2023.08)] 12 Claims
OG exemplary drawing
 
1. An unducted fan with variable pitch blades for an aeronautical or wind turbine thruster, comprising a hub equipped with housings receiving vanes pivoting about radial axes, and an external casing constituting an aerodynamic fairing for the hub, said housings opening into said external casing through circular openings, each vane comprising:
a root configured to be mounted in rotation about a radial axis in the associated housing;
a generally radially oriented blade; and
a platform substantially in the shape of a disc extending, transversely with respect to the radial direction, from said blade to an edge of the circular opening of the associated casing, the blade comprising at least one skin comprising an aerodynamic external surface defining a pressure side and a suction side of the blade, said skin comprising a free lower edge turned towards said root,
wherein the platform is fitted to the free lower edge of the skin.