US 12,241,377 B2
Turbomachine module equipped with a blade pitch-changing system of a stator vane
Christophe Lima, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/800,067
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Feb. 17, 2021, PCT No. PCT/FR2021/050282
§ 371(c)(1), (2) Date Aug. 16, 2022,
PCT Pub. No. WO2021/165616, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 2001674 (FR), filed on Feb. 19, 2020.
Prior Publication US 2023/0079110 A1, Mar. 16, 2023
Int. Cl. F01D 17/14 (2006.01); B64C 11/32 (2006.01); B64D 27/10 (2006.01); F01D 9/04 (2006.01); F01D 17/16 (2006.01)
CPC F01D 17/141 (2013.01) [B64C 11/32 (2013.01); B64D 27/10 (2013.01); F01D 9/041 (2013.01); F01D 17/162 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A turbomachine module with longitudinal axis, comprising:
an unducted propeller driven in rotation about the longitudinal axis; and
at least one straightener comprising a plurality of unducted variable pitch stator vanes extending along a radial axis perpendicular to the longitudinal axis from a stationary casing, wherein each variable pitch stator vane comprises a blade and a root;
a first pitch change system for changing a pitch of the blades of the stator vanes, wherein the first pitch change system comprises:
at least one first actuator comprising a first stationary body connected to the stationary casing and a first movable body axially movable with respect to the first stationary body, and
at least one first connection mechanism connecting each stator vane to the first movable body of the first actuator, the first connection mechanism comprising:
a connection annulus centered on the longitudinal axis and connected to the root of each stator vane; and
at least one lever connected to the connection annulus and to the first movable body of the first actuator;
a support fixedly secured to an external casing,
wherein the at least one lever has a first branch and a second branch, wherein the lever is pivotally connected to the support between the first branch and the second branch, the external casing surrounding the connecting annulus, and
an axial rod connected to the first movable body of the first actuator.