EP0037865B1 - Ventilsystem zur Steuerung der Ausströmrichtung eines Fluidums aus einer Düse bei einem Schubsystem - Google Patents

Ventilsystem zur Steuerung der Ausströmrichtung eines Fluidums aus einer Düse bei einem Schubsystem Download PDF

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Publication number
EP0037865B1
EP0037865B1 EP19800301123 EP80301123A EP0037865B1 EP 0037865 B1 EP0037865 B1 EP 0037865B1 EP 19800301123 EP19800301123 EP 19800301123 EP 80301123 A EP80301123 A EP 80301123A EP 0037865 B1 EP0037865 B1 EP 0037865B1
Authority
EP
European Patent Office
Prior art keywords
discharge
vanes
thruster system
ducting
thruster
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19800301123
Other languages
English (en)
French (fr)
Other versions
EP0037865A1 (de
Inventor
George Karstel
Thomas Alexander Mcconnell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weir Pumps Ltd
Weir Warmtekracht BV
Original Assignee
Weir Pumps Ltd
Weir Warmtekracht BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weir Pumps Ltd, Weir Warmtekracht BV filed Critical Weir Pumps Ltd
Priority to EP19800301123 priority Critical patent/EP0037865B1/de
Priority to DE8080301123T priority patent/DE3068995D1/de
Publication of EP0037865A1 publication Critical patent/EP0037865A1/de
Application granted granted Critical
Publication of EP0037865B1 publication Critical patent/EP0037865B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/46—Steering or dynamic anchoring by jets or by rudders carrying jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose

Definitions

  • the present invention relates to a thruster system for use in marine craft including ducting for location in the hull of the craft, the ducting having a pair of opposed discharge outlets discharging externally of the hull, means for directing a fluid flow through the ducting to the discharge outlets and control means for controlling the flow discharge. More especially the system can be used in a ship's bowthrusting system.
  • Water jet propulsion systems are known in the marine art for propelling ships as an alternative to conventional propellor propulsion: this is particularly beneficial for use in water conditions where there would be a high risk of fouling of the propellor or where there is small water depth mitigating against the use of a propellor.
  • Such a marine craft water jet propulsion system is shown in U.S. Patent 3,824,946, wherein an impeller driven by the main engine of the marine craft draws in water via an aperture in the craft's bottom and directs the water via ducting to a rearward discharge.
  • the system additionally includes a pair of vanes located externally at the discharge and pivotal about parallel vertical axes whereby the discharge direction of the water jet can be varied to provide a steering effect.
  • the conventional rudder can be dispensed with and the variable direction water jet has the advantage of enabling the craft to be manoeuvred even when the craft has little motion or way on.
  • the vanes of U.S. Patent US-A-3,824,946 can be set to divert the water jet through 180° and thereby provide rearward propulsion for the marine craft.
  • Bow thrusting systems typically consist of a pump, which may be driven by an auxilliary diesel engine, electric or hydraulic motor, discharging through a system of ducting and/or flow control devices.
  • a previous bow thrusting system is described in published UK patent application No. 2007174A.
  • the bow thrusting system of UK patent application No. GB-A-2007174 comprises lateral ducting providing opposed lateral water discharges in the forward section of the ship's hull; water is pumped to the ducting from an aperture in the ship's bottom.
  • Vane means located centrally in the ducting are operable to direct the water to a selected one of the discharges or to both discharges.
  • nozzle means are provided in each discharge and controllable, for example by further vanes, whereby the water discharged from the ducting can be given a definite forward or rearward component of motion, in addition to a purely transverse discharge direction.
  • each discharge outlet of the lateral ducting comprising a diverging outlet portion when viewed in plan view and by providing valve means to control the direction of fluid flow through each discharge outlet or preclude fluid flow from the outlet, comprising a pair of pivotal vanes at each discharge outlet having parallel pivot axes.
  • the parallel pivot axes of the vanes are located at the inlet to the diverging outlet portion so that a portion of each vane projects into the diverging outlet portion.
  • each diverging outlet portion has a divergence angle of approximately 90°.
  • the vanes at each discharge outlet can pivot in unison to control the direction of water discharge, or be pivoted in a contra-direction to close the discharge outlet when the water discharge is to recur from the other side only so as to create a turning movement on the vessel.
  • each vane pair of the present invention enables selection of a precise direction of water discharge from an outlet anywhere in the range from the pure transverse direction to a preferred angle of 45° on either side of said transverse direction: this enables a high degree of manoeuvrability to be achieved.
  • a transverse thruster 1 is fitted into a ship's hull 2 towards the bow thereof and comprises a transverse duct 3 close to the bottom 4 of the hull 2 and a pair of venturi-type discharges (or nozzles) 5 at opposite ends of the duct 3 discharging externally of the hull 2.
  • a central lateral duct 6 opens into the transverse duct 3 and houses a pump 7 comprising an axial flow impeller 8, flow to the impeller 8 being via a frustrum inlet 9 at the ships bottom 4.
  • the impeller is mounted on a shaft rotor 10 and located by a thrust collar 11 and a sleeve bearing 12, and the rotor 10 is driven by a suitable motor (not shown) e.g.
  • the pump 7 is set at as low as possible relative to the bottom of the ship to ensure that the impeller 8 is fully submerged under all conditions of ship loading.
  • the discharges 5 on the other hand may or may not be submerged under all loading conditions.
  • each discharge 5 includes a diverging outlet frustrum 22, and the axes of the shafts 18 of each valve 16 are located in the plane containing the frustum inlet end with a portion of each vane projecting into the frustrum.
  • the pump 7 In operation of the thruster 1, e.g. when the ship is manoeuvering in confined waters or is docking or undocking, the pump 7 is driven to discharge water into the duct 3 and the desired manoeuvre is achieved by controlled thrusting discharge of the water by means of diverter valves 16, as is illustrated in Figs. 3 to 6 and outlined as follows:
  • this operational mode is more effective where the thruster is located closer to the centre of turning (centre of gravity) of the ship.
  • Valve position selection can be carried out remotely e.g. from the ship's bridge control room.
  • the angle of pivoting of each vane may be varied for fine manoeuvres, and the thrust can be adjusted by varying the pump speed to give alteration of the water flow through the ducting.
  • the above valve arrangement provides efficient control of the direction of the discharging flow and hence correspondingly efficient thrusting in any of the desired directions as described.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Lift Valve (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (8)

1. Schubsystem für ein Wasserfahrzeug mit einem in den Fahrzeugrumpf einbaubaren Kanal, der zwei gegenüberliegende Ausstoß- öffnungen aufweist, die außerhalb des Rumpfes ablassen, mit Mitteln, die einen Fluidstrom durch den Kanal zu den Ausstroßöffnungen richten und mit Mitteln zur Steuerung der Ausströmung, dadurch gekennzeichnet, daß jede Ausstoßöffnung (22) - in Draufsicht gesehen (Fig. 1) - einen divergierenden Auslaßteil aufweist und daß Ventilmittel (16) zur Steuerung der Richtung des Fluidstromes durch jede Ausstoßöffnung (22) oder zur Verhinderung des Fluidstromauslasses vorgesehen sind, wobei das Ventilmittel (16) an jeder Ausstoßöffnung (22) mit zwei schwenkbaren Flügeln (17) versehen ist, deren Drehachsen (18) parallel verlaufen.
2. Schubsystem nach Anspruch 1, dadurch gekennzeichnet, daß die parallelen Drehachsen (18) der Flügel (17) an dem Eingang zu dem divergierenden Auslaßteil (22) angeordnet sind, so daß ein Teil jedes Flügels (17) in den divergierenden Auslaßteil hineinragt.
3. Schubsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Flügel (17) so schwenkbar sind, daß sie mit ihrer einen Spitze stromaufwärts zu dem divergierenden Auslaßteil (22) eine Wand des Kanals (3) berühren.
4. Schubsystem nach den vorangegangenen Ansprüchen, dadurch gekennzeichnet, daß jeder divergierende Auslaßteil Wandabschnitte (22) aufweist, die - in Draufsicht - auswärts divergieren, um mit einer Seite (2) des Wasserfahrzeugs zusammenzutreffen.
5. Schubsystem nach Anspruch 4, dadurch gekennzeichnet, daß der Divergenzwinkel des Wandabschnittes (22) sich 90° nähert.
6. Schubsystem nach den vorangegangenen Ansprüchen, dadurch gekennzeichnet, daß die Ventilmittel (16) in dem Hals eines Venturidüsenauslasses (5) angeordnet sind.
7. Schubsystem nach den vorangegangenen Ansprüchen, dadurch gekennzeichnet, daß die Flügel (17) auf drehbaren Wellen (18) angeordnet sind, die von Motormitteln (20, 21) angetrieben werden.
8. Schubsystem nach den vorangegangenen Ansprüchen, dadurch gekennzeichnet, daß die Flügel (17) Stromlinienflügelform aufweisen.
EP19800301123 1980-04-09 1980-04-09 Ventilsystem zur Steuerung der Ausströmrichtung eines Fluidums aus einer Düse bei einem Schubsystem Expired EP0037865B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19800301123 EP0037865B1 (de) 1980-04-09 1980-04-09 Ventilsystem zur Steuerung der Ausströmrichtung eines Fluidums aus einer Düse bei einem Schubsystem
DE8080301123T DE3068995D1 (en) 1980-04-09 1980-04-09 Valve system for controlling the direction of fluid discharge from a nozzle in a thruster system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19800301123 EP0037865B1 (de) 1980-04-09 1980-04-09 Ventilsystem zur Steuerung der Ausströmrichtung eines Fluidums aus einer Düse bei einem Schubsystem

Publications (2)

Publication Number Publication Date
EP0037865A1 EP0037865A1 (de) 1981-10-21
EP0037865B1 true EP0037865B1 (de) 1984-08-22

Family

ID=8187138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800301123 Expired EP0037865B1 (de) 1980-04-09 1980-04-09 Ventilsystem zur Steuerung der Ausströmrichtung eines Fluidums aus einer Düse bei einem Schubsystem

Country Status (2)

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EP (1) EP0037865B1 (de)
DE (1) DE3068995D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642684A (en) * 1996-06-17 1997-07-01 Omnithruster Inc. Thrust director unit for a marine vessel
GB0008763D0 (en) 2000-04-10 2000-05-31 Lewmar Ltd Thruster
KR101323830B1 (ko) * 2011-03-16 2013-10-31 삼성중공업 주식회사 선박용 추진 장치 및 이를 포함하는 선박
ITGE20110036A1 (it) 2011-04-05 2012-10-06 Enrico Bruno Brizzolara Propulsore navale intubato
WO2022201008A1 (en) * 2021-03-22 2022-09-29 Zerojet Limited A reversable jet powered watercraft and a reversable jet unit or of for such

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3008443A (en) * 1956-10-22 1961-11-14 Voith Gmbh J M Device for covering transverse passages in ships
US3561392A (en) * 1967-10-23 1971-02-09 Guillermo Federico Baez Unit of propulsion by hydrodynamic reaction
US3824946A (en) * 1972-08-30 1974-07-23 D Macardy Water jet propulsion unit
DD103615A1 (de) * 1973-03-30 1974-02-05
US4214544A (en) * 1977-10-31 1980-07-29 Omnithruster Inc. Boat thruster

Also Published As

Publication number Publication date
DE3068995D1 (en) 1984-09-27
EP0037865A1 (de) 1981-10-21

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