EP0201657B1 - Bateau avec propulsions par jet d'eau et propulsion par jet d'eau pour bateaux - Google Patents

Bateau avec propulsions par jet d'eau et propulsion par jet d'eau pour bateaux Download PDF

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Publication number
EP0201657B1
EP0201657B1 EP19850850164 EP85850164A EP0201657B1 EP 0201657 B1 EP0201657 B1 EP 0201657B1 EP 19850850164 EP19850850164 EP 19850850164 EP 85850164 A EP85850164 A EP 85850164A EP 0201657 B1 EP0201657 B1 EP 0201657B1
Authority
EP
European Patent Office
Prior art keywords
water
craft
watercraft
jet
tube
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
EP19850850164
Other languages
German (de)
English (en)
Other versions
EP0201657A1 (fr
Inventor
Hans Peter Martensson
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.)
Kamewa AB
Original Assignee
Kamewa AB
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 Kamewa AB filed Critical Kamewa AB
Priority to DE8585850164T priority Critical patent/DE3573909D1/de
Publication of EP0201657A1 publication Critical patent/EP0201657A1/fr
Application granted granted Critical
Publication of EP0201657B1 publication Critical patent/EP0201657B1/fr
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
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/10—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof
    • B63H11/107—Direction control of propulsive fluid
    • B63H11/113—Pivoted outlet

Definitions

  • the present invention relates to a watercraft fitted with water-jet propulsion unit, in accordance with the preamble of Claim 1, and to a water-jet propulsion unit for watercraft.
  • a water-jet propulsion unit for watercraft comprises a pump, normally a propeller pump, mounted in a suitable location, normally in the after end of the craft, and connected to a water-supply conduit which extends from an intake opening normally arranged in the bottom of the craft.
  • the pump outlet is located externally of the hull of the watercraft, behind the transom, and is directed so that the jet of water generated by the pump leaves the outlet in a substantially straight, rearward direction, to propel the watercraft forwards.
  • a pipe or tube which is connected to the outlet opening and can be swung about a substantially vertical axis, to change the direction of the propelling water jet for the purpose of steering the craft.
  • a reversing arrangement in the form of a scoop or flap or like device for example, which can be swung into the path of the water jet, either in the fixed outlet channel or in the pivotable tube arranged rearwardly of the channel for steering the watercraft, or immediately behind the outlet orifice of the tube, so as to deflect the water jet obliquely forwards, thereby to generate a reverse thrust for slowing down and/or reversing the craft.
  • the reversing device is so adapted that when occupying its active position the water jet is deflected downwardly and forwardly in a substantially vertical plane, so as to be directed beneath the bottom of the craft.
  • This has certain disadvantages, which are particularly manifest in the case of certain types of watercraft.
  • the forwardly and obliquely downwardly directed water jet will pass close to the bottom of the craft and therewith in the near vicinity of the intake opening of the unit water-supply channel.
  • this water jet will be drawn again into the water-supply channel and fed to the pump, meaning in reality that water will be recycled through the unit by the pump.
  • the reversing device of each of the two water-jet units is so formed and arranged on the pivotable tube that when a respective reversing device occupies its active position the propelling water jet is directed obliquely forwards towards and solely towards the side remote from the centre line thereof, such that said deflected water jet passes substantially outwardly of that side of the craft hull adjacent the unit.
  • Figs. 1 and 2 illustrate schematically the stern part of a watercraft, including a transom 1 and bottom 2.
  • the illustrated craft is provided with two jet propulsion units, generally referenced 3 and 4, which are mounted in the stern symmetrically on both sides of the centre line of the craft.
  • Each of the jet propulsion units includes a propeller pump having a pump housing 5 which is so mounted in the transom 1 that the inlet to the pump housing 5 is located within the hull of the vessel, while the outlet opening from the pump housing is located externally of the transom 1 and is pointed in a substantially straight and rearward direction.
  • a water supply channel 6 Connected to the inlet of the pump housing 5 is a water supply channel 6 which extends from a water intake 7 in the bottom 2 of the craft.
  • the pump impeller in the pump housing 5 is driven by a shaft 8 from a drive machine (not shown) mounted within the craft.
  • a pipe or tube 9 Connected to the outlet opening of the pump housing 5 is a pipe or tube 9 which can be swung by means of piston- cylinder devices 10 about a substantially vertical axis 11 in a manner to direct the water jet exiting from the outlet opening of the pump housing 5 in a manner to steer the craft in different directions.
  • jet propulsion units are of previously known construction. These jet propulsion units are described more clearly in, for example, Swedish Patent Specification 424 845. Many other embodiments of jet propulsion units of a similar kind are known to the art. It will be understood that the two jet propulsion units 3 and 4 mounted on the watercraft illustrated by way of example in the drawing are constructed in mutually the same manner in the aforedescribed respects.
  • This reversing device may have a number of different forms, and may comprise, for example, a scoop-like member or a flap or some like device arranged for movement from an inactive position to an active position in which it is located in the path of the water jet, so as to deflect the jet to a substantially forward direction.
  • the reversing device is normally mounted on the pivotable steering tube so that deflection of the jet is effected in the tube or immediately behind the rearward outlet orifice thereof, thereby enabling the tube to be used for steering the craft even when moving astern.
  • a conventional, known reversing device occupies its active state the water jet is normally deflected obliquely downwardly and forwardly, i.e. in a substantially vertical plane, so that the water jet passes down beneath the bottom of the craft.
  • the reversing device is so designed that when occupying its active state the water jet is deflected obliquely forwardly and towards the side remote from the centre line of the craft, so that the deflected water-jet passes substantially outwardly of the near side of the hull of the craft.
  • each reversing device of respective propulsion units 3 and 4 comprises a scoop-like element 13 which can be swung into the tube 9 by means of a hydraulic piston cylinder device 12 and which is arranged on the side of the tube 9 remote from the centre line of the craft, in a manner such that with the reversing device in its active state the water jet is deflected obliquely forwardly in a substantially horizontal plane, away from the aforesaid centre line.
  • the water jets 14, 15 deflected by the reversing scoops 13 and issuing from the tube propulsion units 3,4 are directed obliquely outwardly and forwardly on respective sides of the craft, as illustrated schematically in Fig. 3.
  • a watercraft reversing device of this design affords the advantages discussed in the aforegoing, namely that water will not be recycled through the propulsion unit when reversing the craft, with subsequent reduction in the propelling force, and neither will the stern end of the craft be subjected to lifting forces. In addition, substantially no air will be drawn down into the water around the craft. The water jets will also pass outwardly of the hull on both sides of the craft, so as not to strike the transom thereof or to cause water to be sprayed there into to any appreciable extent.
  • the reversing devices 13 When the reversing devices 13 are mounted on the pivotable tubes 9 used to steer the craft, there is afforded the additional advantages that, as illustrated in Fig. 4, the water jets 14 and 15 deflected by the reversing devices 13 and issuing from the two jet propulsion units 3 and 4 may be directed in mutually different directions by pivoting the tubes 9.
  • the craft is not solely subjected to a rearwardly acting force but also to a rotary or torsional force, by means of which the craft can be swung or "twisted" free from a beach.
  • the sides of the hull at the stern part of the craft may be provided with cavities or recesses 16 operative in allowing the water jets to pass in this position

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Cleaning Or Clearing Of The Surface Of Open Water (AREA)
  • Jib Cranes (AREA)

Claims (4)

1. Bateau équipé d'au moins deux groupes de propulsion par jet d'eau (3,4) montés sur la partie arrière du bateau, symétriquement de part et d'autre de son axe médian, chaque groupe (3,4) comportant une pompe et un carter de pompe (5) ayant une ouverture d'arrivée raccordée à un conduit d'alimentation en eau (6) et une ouverture de sortie située à l'extérieur et à l'arrière du tableau arrière (1) du bateau, ouverture de sortie à laquelle est raccordé un tube (9) qui peut pivoter autour d'un axe pratiquement vertical pour diriger un jet d'eau de propulsion sortant à travers l'ouverture de sortie dans une direction choisie, et un dispositif d'inversion (13) monté sur le tube (9) et agencé pour se déplacer entre une position inactive et une position active pour dévier le jet d'eau en oblique vers l'avant par rapport au bateau, caractérisé en ce que le dispositif d'inversion (13) de chaque groupe (3,4) est formé et monté sur le tube pivotant (9) de telle sorte que, lorsque le dispositif d'inversion occupe sa position active, le jet d'eau de propulsion soit dirigé en oblique vers l'avant, et seulement en direction du côté éloigné de l'axe médian du bateau, de façon que le jet d'eau dévié (14,15) passe prati- guement à l'extérieur du côté de la coque du bateau adjacent au groupe.
2. Bateau selon la revendication 1, caractérisé en ce que les côtés de la coque au voisinage de la partie arrière du bateau comportent des évidements (16) permettant le passage des jets d'eau (14, 15) déviés par les dispositifs d'inversion (13) des deux groupes (3,4).
3. Groupe de propulsion de bateau par jet d'eau pour un bateau selon la revendication 1, comprenant une pompe ayant un carter de pompe (5) avec une ouverture d'arrivée raccordée à un conduit d'alimentation en eau (6) et une ouverture de sortie à laquelle est raccordé un tube (9) qui peut pivoter autour d'un axe pratiquement vertical pour diriger un jet d'eau de propulsion sortant de l'ouverture de sortie dans une direction choisie, et un dispositif d'inversion (13) monté sur ce tube (9) et pouvant être réglé entre une position inactive et une position active de façon à dévier le jet d'eau en oblique vers l'avant, vu dans la direction de propulsion normale du groupe, caractérisé en ce que le dispositif d'inversion (13) est formé et monté sur le tube pivotant (9) de telle sorte que, dans la position active du dispositif, le jet d'eau est dévié obliquement vers l'avant et latéralement sur seulement un seul côté du tube pivotant (9).
4. Groupe de propulsion par jet d'eau selon la revendication 3, caractérisé en ce que, lorsqu'il occupe sa position active, le dispositif d'inversion (1.3) dévie le jet d'eau en oblique vers l'avant et latéralement dans un plan pratiquement horizontal.
EP19850850164 1984-02-10 1985-05-09 Bateau avec propulsions par jet d'eau et propulsion par jet d'eau pour bateaux Expired EP0201657B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8585850164T DE3573909D1 (en) 1985-05-09 1985-05-09 A watercraft fitted with water-jet propulsion units, and a water-jet propulsion unit for watercraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8400727A SE8400727L (sv) 1984-02-10 1984-02-10 Straldriftsaggregat for fartyg

Publications (2)

Publication Number Publication Date
EP0201657A1 EP0201657A1 (fr) 1986-11-20
EP0201657B1 true EP0201657B1 (fr) 1989-10-25

Family

ID=20354691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850850164 Expired EP0201657B1 (fr) 1984-02-10 1985-05-09 Bateau avec propulsions par jet d'eau et propulsion par jet d'eau pour bateaux

Country Status (2)

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EP (1) EP0201657B1 (fr)
SE (1) SE8400727L (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6875064B2 (en) * 2003-06-13 2005-04-05 Bombardier Recreational Products Inc. Reverse gate for a watercraft

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680315A (en) * 1970-10-12 1972-08-01 Twin Disc Inc Hydraulic jet propulsion apparatus
US3756185A (en) * 1972-03-08 1973-09-04 Custom Speed Marine Inc Water jet boat thrust trimmer
US4252075A (en) * 1976-10-28 1981-02-24 Yamaha Hatsudoki Kabushiki Kaisha Water jet propulsion system with laterally disposed reverse ports
IT1177771B (it) * 1983-06-08 1987-08-26 Dowty Hydraulic Units Ltd Perfezionamento nei complessi propulsori marini a getto

Also Published As

Publication number Publication date
SE8400727L (sv) 1985-08-11
SE8400727D0 (sv) 1984-02-10
EP0201657A1 (fr) 1986-11-20

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