A marine propeller

B - Operations – Transporting – 63 – H

Patent

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Details

B63H 3/12 (2006.01) B63H 3/00 (2006.01) B63H 3/02 (2006.01)

Patent

CA 2304447

The invention relates to a marine propeller having adjustable propeller blades (5) attached to a hub (1, 2). The root-part (7) of each blade (5) is mounted in the hub (1, 2) for rotation about an axis that defines an angle with the axial direction of the propeller. A blade setting adjusting means (4, 5) is adapted for rotating all blades (5) in unison. According to the invention, the blade setting adjusting means comprises a blade setting adjuster ring (4) which includes locking means (20, 21) for co-action with locking means (22, 23) on the hub. The adjuster ring (4) can be moved axially between a locking position in which the adjuster ring is locked against rotation, and a release position in which the adjuster ring can be rotated relative to the hub (1, 2). The locking means (20, 21, 22, 23) define a plurality of distinct rotational positions of the adjuster ring (4). Movement transmission means (15, 17) transfer rotary movement of the adjuster ring (4) to respective blades (5).

Cette hélice marine est constituée de pales d'hélice réglables (5) montées sur un moyeu (1, 2). L'attache (7) de chaque pale (5) est montée rotative dans le moyeu (1, 2) autour d'un axe définissant un angle par rapport au sens axial de l'hélice. Une manoeuvre de pas d'hélice (4, 5) est conçue pour faire tourner toutes les pales (5) en parfait synchronisme. La manoeuvre de pas d'hélice de l'invention comporte une bague de commande d'angle de pale (4) pourvue d'un mécanisme de verrouillage (20, 21) coopérant avec le mécanisme de verrouillage (22, 23) du moyeu. La bague de commande (4) est axialement mobile entre une position verrouillée et une position débloquée. En position verrouillée, la rotation de la bague de commande reste interdite. En position débloquée, la bague de commande peut tourner par rapport au moyeu (1, 2). Le mécanisme de verrouillage (20, 21, 22, 23) définit une pluralité de positions de rotation distinctes de la bague de commande (4). Des organes de transmission de mouvement (15, 17) transfèrent aux pales d'hélice considérées (5) le mouvement de rotation de la bague de commande (4).

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