US 12,331,647 B2
System for controlling the pitch setting of a propeller vane for an aircraft turbine engine
Régis Eugène Henri Servant, Moissy-Cramayel (FR); Clément Cottet, Moissy-Cramayel (FR); Laurent Jablonski, Moissy-Cramayel (FR); and Jean-Claude Christian Taillant, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/686,008
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Aug. 31, 2021, PCT No. PCT/FR2021/051500
§ 371(c)(1), (2) Date Feb. 23, 2024,
PCT Pub. No. WO2024/031522, PCT Pub. Date Feb. 23, 2024.
Prior Publication US 2025/0035009 A1, Jan. 30, 2025
Int. Cl. F01D 25/28 (2006.01); B64C 11/06 (2006.01); B64C 11/30 (2006.01); F01D 17/10 (2006.01)
CPC F01D 17/10 (2013.01) [B64C 11/06 (2013.01); B64C 11/30 (2013.01); F01D 25/28 (2013.01); F05D 2230/60 (2013.01); F05D 2260/31 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for controlling a pitch setting of a propeller vane for an aircraft turbine engine, comprising:
a vane comprising a blade connected to a root, the vane comprising a pitch axis and the root comprising a bulb which has a lower bearing surface and an upper bearing surface, both of which extend around said axis,
a hub comprising an annular wall extending about said axis, the annular wall comprising a lower axial end closed by a bottom wall and an upper axial end open and configured to allow the root of the vane to be mounted inside the hub, the bottom wall comprising a recess having a non-circular cross-section and configured to receive a free end of complementary shape to said root so that the hub is secured in rotation to the root about said axis,
a ring which extends around said axis and which is mounted around the root and in the hub, the ring comprising a lower wall which is located in the hub and which comprises an aperture through which said free end of the root passes, said lower bearing surface of the bulb of the root being configured to bear at least in an axial direction on the lower wall, on the side opposite the blade of the vane, the ring further comprising a perforated intermediate wall and a thread at an upper end,
abutments which are arranged around said axis and which are mounted around the root and in the hub, the abutments being engaged in openings in said intermediate wall and in at least one housing of the annular wall of the hub, said upper bearing surface of the bulb of the root being configured to bear at least in the axial direction on these abutments, on the same side as the blade of the vane, and
a nut in threaded engagement with the thread of the ring and configured to bear axially on said hub so that tightening the nut forces the lower wall of the ring to bear on the lower bearing surface of the bulb of the root, the upper bearing surface of the bulb to bear on the abutments, and the abutments to bear on complementary support surfaces of said at least one housing of the hub.