Snecma

Safran Aircraft Engines

Adrien Laurenceau

Adrien Jacques Philippe Fabre

Christophe Paul Jacquemard

Sebastien Tajan

Romain Boudier

Adrien Jacques Fabre

Matthieu Arnaud Gimat

Jonathan Evert Vlastuin

Adrien Philippe Fabre

Sébastien Tajan

Matthieu Gimat

Christophe Jacquemard

An aircraft propeller blade including a streamlined structure constituted by at least one piece of fiber reinforcement obtained by three-dimensionally weaving yarns and densified by a matrix, together with a spar including an enlarged portion extending outside the fiber reinforcement and forming the root of the blade, and a shaping portion present in a housing arranged inside the fiber reinforcement. The fiber reinforcement includes a non-interlinked zone forming the housing inside the fiber reinforcement. The non-interlinked zone opens out into the bottom portion and into the rear edge of the fiber reinforcement so as to form an opening for inserting the shaping portion of the spar into the housing of the fiber reinforcement. The opening present in the rear edge of the fiber reinforcement extends over a height that is less than the height of the housing.

Composite propeller blade for an aircraft

A variable-pitch vane including a plurality of propeller blades (). Each blade has a variable pitch according to a blade rotational axis (A) and a root (). A plurality of rotor connecting shafts (), each shaft having a foot () and a head (). The root () of each blade is mounted on the head () of a rotor connecting shaft via a pivot () in such a way as to allow each blade () to rotate according to the blade rotational axis (A), in which each blade () has a blade pitch, such that the blade rotational axis (A) is inclined relative to a radial axis (A) passing through the foot () of the corresponding shaft.

Variable-pitch vane

A pivot for an air propeller blade, the pivot including a rotary support for mounting radially on a propeller hub while being suitable for pivoting about a pivot axis; and a blade support including a housing for receiving a blade root and at least one arm extending laterally relative to the pivot axis and carrying a flyweight forming a counterweight; the arm and its flyweight presenting the general geometrical shape of a spherical cap.

Air propeller blade pivot in the shape of a spherical cap

The invention relates to the field of aerial propellers, in particular the field of variable-pitch propellers, specifically for unducted fans. More specifically, the invention relates to a pivot () for a blade () of a propeller (), the pivot including at least a proximal portion () made of metal and suitable for being retained in a radial orifice of a propeller hub, while being capable of turning in said orifice about a longitudinal axis (Z) of the pivot (), and a distal portion () including a receptacle () suitable for retaining a blade root, and at least one arm () of organic matrix composite material extending laterally relative to said longitudinal axis (Z) and supporting a flyweight ().

Propeller blade pivot

Growing community of inventors

Melun, France

Adrien Laurenceau