US 12,491,987 B2
Aircraft turbine engine comprising variable-pitch propeller vanes
Vincent Joudon, Moissy-Cramayel (FR); Clément Cottet, Moissy-Cramayel (FR); Vivien Mickaël Courtier, Moissy-Cramayel (FR); Laurent Jablonski, Moissy-Cramayel (FR); and Régis Eugène Henri Servant, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/006,350
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jul. 15, 2021, PCT No. PCT/FR2021/051314
§ 371(c)(1), (2) Date Jan. 20, 2023,
PCT Pub. No. WO2022/018357, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 2007809 (FR), filed on Jul. 24, 2020; and application No. 2007812 (FR), filed on Jul. 24, 2020.
Prior Publication US 2023/0294817 A1, Sep. 21, 2023
Int. Cl. B64C 11/06 (2006.01); B64C 11/30 (2006.01); F01D 5/30 (2006.01); F01D 7/00 (2006.01); F04D 29/32 (2006.01)
CPC B64C 11/06 (2013.01) [B64C 11/30 (2013.01); F01D 5/30 (2013.01); F01D 7/00 (2013.01); F04D 29/323 (2013.01); F05D 2260/70 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A variable pitch propeller vane, the vane comprising a blade connected to a root, the root comprising a body housed in an annular barrel which extends around a pitch axis of the vane, the body being full and devoid of any hollow or recessed portion, the body being made of a single part without assembly of sub-parts, the body comprising:
a free end located on the side opposite the blade, the free end being configured to cooperate in a form-fitting manner with a system, the free end being crossed by the pitch axis and having a cross-section, referred to as low section, which has a non-circular shape and a value Sb;
a stilt located on the side of the blade, this stilt having a cross-section, referred to as high section, which has a value Sh; and
a bulb located between the free end and the stilt, the bulb having in section a convex rounded shape extending between the free end and the stilt and having at a summit of this shape a cross-section, referred to as middle section, which has a maximum value Sm which is greater than Sh and Sb,
wherein the barrel is attached to the body and covers and conforms to at least one portion of the bulb and the stilt, the barrel having a shape complementary in section to the bulb at a level of the middle section and to the stilt at the level of the high section, and
wherein the low section is eccentric with respect to the pitch axis.