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1. WO1996005100 - FLOATING SEAL FOR HIGH ROTATIONAL SPEED PROPELLER SHAFTS WITH INTEGRATED FORCED OIL CIRCULATION GENERATOR AND SAFETY DEVICES

Publication Number WO/1996/005100
Publication Date 22.02.1996
International Application No. PCT/MC1995/000001
International Filing Date 08.08.1995
Chapter 2 Demand Filed 05.03.1996
IPC
B63H 23/32 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
HMARINE PROPULSION OR STEERING
23Transmitting power from propulsion power plant to propulsive elements
32Other parts
CPC
B63H 2023/327
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
HMARINE PROPULSION OR STEERING
23Transmitting power from propulsion power plant to propulsive elements
32Other parts
321Bearings or seals specially adapted for propeller shafts
327Sealings specially adapted for propeller shafts or stern tubes
B63H 23/321
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
HMARINE PROPULSION OR STEERING
23Transmitting power from propulsion power plant to propulsive elements
32Other parts
321Bearings or seals specially adapted for propeller shafts
Applicants
  • PEDONE, Antonio [IT/MC]; MC
Inventors
  • PEDONE, Antonio; MC
Agents
  • ADORNO, Silvano; Società Italiana Brevetti Via Carducci, 8 I-20123 Milano, IT
Priority Data
219/227608.05.1995MC
227610.08.1994MC
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) FLOATING SEAL FOR HIGH ROTATIONAL SPEED PROPELLER SHAFTS WITH INTEGRATED FORCED OIL CIRCULATION GENERATOR AND SAFETY DEVICES
(FR) JOINT ETANCHE FLOTTANT POUR AXES D'HELICE A HAUTE VITESSE DE ROTATION AVEC GENERATEUR DE CIRCULATION FORCEE D'HUILE INCORPORE ET DISPOSITIFS DE SECURITE
Abstract
(EN)
Two stage positive sealing device for high speed boat propeller shafts, with forced oil circulation for lubricating and cooling purposes provided by an integrated generator. A pump body, formed of an asymmetric static chamber housed within the bronze bushing (11), uses the rotation of the propeller shaft (2) which also functions as a mobile ring, so that the output remains proportional to the needs. Water-free self-lubrication and cooling is provided, so that the seal is useful for boats where high speeds produce a water void at the shaft outlet. There is no uptake of motive power due to the extremely low friction coefficient, the self-alignment function, and the absence of rigid attachment means inducing a strain in the transmission. The seal is floating due to an antirotation device and functions even on worn and twisted shafts without transmitting vibrations to the hull. The seal is devoid of disks or rings fastened to the shaft so as to slide freely, and operates temporarily even in case of seizing. Safety means prevent serious accidents.
(FR)
L'invention concerne un joint d'étanchéité à deux étages, pour axes d'hélices de bateaux haute vitesse, totalement étanche. Circulation forcée d'huile pour lubrification et refroidissement, parmi générateur incorporé: corps de pompe constitué par chambre statique asymétrique logée à l'intérieur du même coussinet en bronze (11), utilise la rotation du même axe d'hélice (2) qui fonctionne comme couronne mobile, donc prestations toujours proportionnelles aux besoins. Auto-lubrification et refroidissement sans eau: apte pour bateaux où la haute vitesse provoque vide d'eau à la sortie de l'axe. Il n'absorbe puissance motrice grâce au coefficient de friction extrêmement bas, car conçu auto-aligné, exempt des fixations rigides qui provoquent forçages dans la transmission. Flottant, grâce au dispositif anti-rotation fonctionne même sur arbres tordus et usés, sans transmettre vibrations à la coque. Exempt de disques ou bagues fixées à l'arbre, permet son libre coulissement. Fonctionnement provisoire même en cas de grippage. Dispositifs de sécurité préviennent graves accidents.
Also published as
FI970488
NO19970376
NZ290202
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