US 11,982,192 B2
Device for controlling an airflow guiding system, in particular in an aircraft turbine engine
Frédéric Anthony Alain Imbourg, Moissy Cramayel (FR); Pierre Chabanne, Moissy Cramayel (FR); and Thibaut Maxime Javoy, Moissy Cramayel (FR)
Assigned to SAFRAN HELICOPTER ENGINES, Bordes (FR)
Appl. No. 18/034,988
Filed by SAFRAN HELICOPTER ENGINES, Bordes (FR)
PCT Filed Nov. 10, 2021, PCT No. PCT/EP2021/081232
§ 371(c)(1), (2) Date May 2, 2023,
PCT Pub. No. WO2022/101260, PCT Pub. Date May 19, 2022.
Claims priority of application No. FR2011526 (FR), filed on Nov. 10, 2020.
Prior Publication US 2023/0417156 A1, Dec. 28, 2023
Int. Cl. F01D 17/16 (2006.01); F04D 29/56 (2006.01)
CPC F01D 17/162 (2013.01) [F04D 29/563 (2013.01); F05D 2220/329 (2013.01); F05D 2240/128 (2013.01); F05D 2260/60 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A device for controlling an airflow guiding system comprising at least one vane movable in rotation about an axis of rotation between a first angle and a second angle, the control device comprising at least one actuator configured to drive a control rod in translation between a first end position and a second end position of a nominal operating range in which the vane is movable between the first angle and the second angle, the control rod being linked to the axis of the vane by a control lever hinged with respect to a free end of the control rod opposite to the end linked to the actuator, characterized in that:
the control lever comprises a first control connecting rod and a second control connecting rod, said first connecting rod comprising a first end hinged with respect to the free end of the control rod and a second end hinged with respect to a first end of the second connecting rod, said second connecting rod further comprising a second end, opposite to the first end and secured in rotation with the vane, and in that:
the actuator is configured to bring the control rod into a safety position located beyond the second end position of the nominal operating range and orient the vane by a safe pitch angle between the first angle and the second angle,
wherein the control lever comprises only the first and second control rods, and these are hinged together by a ball-joint connection,
wherein the airflow guiding system comprises a plurality of variable-pitch stator vanes comprising a main vane linked to the control lever and a plurality of secondary vanes whose movement is synchronized with the movement of the main vane, the control device further comprises a control ring linked to the control lever and linked to the secondary vanes through secondary connecting rods, the axis of rotation of the vanes being perpendicular to the axis of the control ring, and
wherein the second control connecting rod has a length substantially equal to the lengths of the secondary connecting rods, the control ring being hinged on said second control connecting rod at a point coincident with the ball-joint connection between the two control connecting rods.