Marine heave compensating device and winch drive

Details Marine heave compensating device and winch drive Marine heave compensating device and winch drive

B - Operations, Transporting

66

D

B66D 1/52 (2006.01) B66D 1/12 (2006.01) B66D 1/38 (2006.01) B66D 1/50 (2006.01)

Patent

CA 2393507

A winch for use in a heave compensation system has a winch drum (42) driven by an AC asynchronous motor (50) via a gearbox (52). The motor (50) is controlled by a variable speed control (58) as a function of heave speed. The motor (50) and its drive train, and the winch (42), are chosen to have low inertia. The winch pays out and reels in to compensate for heave substantially instantaneously, without the need for prediction of wave patterns.

L'invention concerne un treuil à utiliser dans un système de compensation. Ce treuil présente un tambour de treuil (42) entraîné par un moteur asynchrone C.A. (50) via une boîte de vitesse (52). Le moteur (50) est commandé par une unité de commande à vitesse variable (58) en tant que fonction de vitesse de pilonnement. Le moteur (50) et sa transmission, ainsi que le treuil (42) sont sélectionnés pour leur faible inertie. Le treuil déroule et enroule afin de compenser le pilonnenement de manière sensiblement instantanée, sans nécessiter la prédiction de modèles de vagues.

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