Method and apparatus for removing a propeller assembly from...

B - Operations – Transporting – 63 – H

Patent

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Details

B63H 21/30 (2006.01) B63B 17/00 (2006.01) B63H 5/125 (2006.01)

Patent

CA 2244118

The invention relates to a method and apparatus for installing a propeller assembly (1) in an opening (9) in the bottom (8) of a swimming vessel and for removing the propeller assembly (1) from the opening (9). The propeller assembly (1) comprises an underwater section (2) including the actual propeller and a top section (3) inside the vessel, between which is fitted a flange element (4) for tightly sealing the opening (9). The apparatus comprises a hoisting chamber (7), which is fitted in the opening (9) in the bottom of a vessel, extends inside the vessel to above waterline and surrounds the top section (3) of the propeller assembly. The apparatus further includes guide elements for guiding the propeller assembly (1) during the course of lifting or lowering. In the method, the propeller assembly (1) is lifted away by way of the top of the hoisting chamber (7) after clampings of the propeller assembly (1) to the hull of a vessel are unfastened and hoisting means (12) are secured to the propeller assembly (1). Installation proceeds in a reversed order.

La présente invention concerne un procédé et un équipement servant à monter un ensemble à hélice (1) dans une ouverture (9) du fond (8) d'un caisson flottant et à le retirer. Cet ensemble à hélice (1) comprend une partie immergée (2), y compris l'hélice proprement dite, et une partie supérieure (3), à l'intérieur du caisson, entre lesquelles est monté un élément à bride (4) servant à fermer l'ouverture (9) de manière étanche. L'équipement comprend une chambre de hissage (7), montée dans l'ouverture (9), qui s'étend à l'intérieur du caisson jusqu'au-dessus de la ligne de flottaison et entoure la partie supérieure (3) de l'ensemble à hélice. L'équipement comprend en outre des éléments de guidage de l'ensemble à hélice pendant la remontée ou la descente. Selon le procédé de l'invention, on retire l'ensemble à hélice (1) en le hissant, au moyen de la partie supérieure de la chambre de hissage (7), après avoir libéré ses fixations le maintenant sur la coque du caisson et fixé sur ledit ensemble un engin de levage (12). L'installation se fait dans l'ordre inverse.

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