B - Operations – Transporting – 66 – D
Patent
B - Operations, Transporting
66
D
B66D 1/44 (2006.01)
Patent
CA 2180004
The invention relates to winches operating with a hydraulic motor. It consists in connecting up the servo-valve for supplying this motor as a 3-way system so that the supply hose used as a discharge when the load is being winched up is connected directly to the fluid return, and so that during the descent action, this motor is no longer supplied with high pressure and makes the fluid circulate in closed circuit without pressure. Complementary means allow this fluid to be refreshed with a flow rate which is low enough that it does not excessively increase the supply of energy, and high enough that it limits the overheating of the fluid. It makes it possible to improve the safety of the winches used for immersing sonars from a helicopter.
L'invention concerne les treuils fonctionnant avec un moteur hydraulique. Elle consiste à brancher la servo-valve d'alimentation (405) de ce moteur en système 3 voies pour que le tuyau d'alimentation (409) utilisé en décharge lors du hissage de la charge soit connecté directement au retour du fluide, et que pendant la descente ce moteur ne soit plus alimenté en haute pression et fasse circuler le fluide en circuit fermé sans pression. Des moyens complémentaires (403) permettent de renouveler ce fluide avec un débit suffisamment faible pour ne pas augmenter excessivement l'apport d'énergie, et suffisamment fort pour limiter la surchauffe du fluide. Elle permet d'augmenter la sécurité des treuils utilisés pour immerger les sonars à partir d'un hélicoptère.
Canto Daniel
Warnan Francois
Goudreau Gage Dubuc
Thomson-Csf
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