Snecma

Sebastien Tajan

Christophe Paul Jacquemard

Adrien Jacques Philippe Fabre

Adrien Laurenceau

Romain Boudier

Adrien Jacques Fabre

Christophe Jacquemard

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

The main aim of the invention is a propeller () for a turboengine () comprising a plurality of blades () and a blade support ring () provided with housings (), each receiving a pivot () bearing the foot () of one of said blades (), characterized in that at least one of the pivots () is equipped with at least one counterweight system () provided with at least one inner channel () for airflow ventilation discharge (F, F) for capturing and guiding said airflow directly in contact with the blade foot () borne by said at least one of the pivots ().

Propeller comprising a counterweight system provided with an air discharge channel

A cleat for a blade foot of a blade of a propeller of a turboengine is provided. The cleat allows the discharge of ventilation airflow of the blade foot.

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Sucy en Brie, France

Sebastien Tajan