EP0157287B1 - Jet drive - Google Patents

Jet drive Download PDF

Info

Publication number
EP0157287B1
EP0157287B1 EP19850103200 EP85103200A EP0157287B1 EP 0157287 B1 EP0157287 B1 EP 0157287B1 EP 19850103200 EP19850103200 EP 19850103200 EP 85103200 A EP85103200 A EP 85103200A EP 0157287 B1 EP0157287 B1 EP 0157287B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
jet propulsion
annular chamber
pressure
chambers
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
EP19850103200
Other languages
German (de)
French (fr)
Other versions
EP0157287A2 (en
EP0157287A3 (en
Inventor
Peter Labentz
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19843417245 external-priority patent/DE3417245A1/en
Priority claimed from DE19843433810 external-priority patent/DE3433810A1/en
Application filed by Individual filed Critical Individual
Publication of EP0157287A2 publication Critical patent/EP0157287A2/en
Publication of EP0157287A3 publication Critical patent/EP0157287A3/en
Application granted granted Critical
Publication of EP0157287B1 publication Critical patent/EP0157287B1/en
Expired legal-status Critical Current

Links

Images

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
    • B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps

Definitions

  • the invention relates to a jet propulsion system for ships with at least one nozzle ring, which is attached at the stern to a holding device arranged under water and is connected to at least one motor-operated high-pressure pump, the nozzle-shaped outlet openings of which are generally horizontally aligned, with an outlet-side circular nozzle slot and a diffuser through which by means of the pressurized water emerging from the nozzle-shaped outlet opening, further water is drawn in to increase the amount of water emerging from the nozzle body.
  • a diffuser ring in which a rotationally symmetrical conical filler body is arranged to form an annular outlet cross section for water.
  • the outlet cross-section can be adjusted by moving the packing.
  • An annular channel with an annular slot facing the diffuser ring is provided in front of the diffuser ring. From this, propellant water enters the diffuser ring and is intended to draw in suction water through the interior of the annular channel by induction.
  • the packing is inserted into the diffuser ring, practically no suction water is sucked in by the motive water flow due to secondary vortices occurring.
  • the object of the invention is to improve the jet propulsion of the type mentioned at the outset in such a way that the jet propulsion is hydrodynamically more favorable and is suitable both for propelling the ship and for maneuvering it.
  • the nozzle body 38 shown in FIGS. 1 and 2 is mounted in a bearing 53 which is fastened on a projection 52 arranged on the stern 3 of the ship.
  • This projection 52 is designed as a cantilever arm projecting over the stern stay 54.
  • the cantilever can be structurally connected to the keel of the ship.
  • the nozzle housing 88 of the nozzle body 38 consists of a rotationally symmetrical ring chamber 41, which is divided into two partial chambers 82, 83 by means of a separating web 81.
  • the partial chambers 82, 83 can alternatively be pressurized with pressurized water and each connected to a rotationally symmetrical ring chamber 48, 48a.
  • the inner annular chamber walls 45, 77 of the annular chambers 41, 48, 48a are designed such that the rotationally symmetrical suction channel 40 surrounded by them has the smallest diameter in the region of the annular chamber 41 and widens in a diffuser-like manner towards the opening-side end sections.
  • a prechamber 84, 85 is formed in front of the subchambers 82, 83 on the pressure water inflow side and is connected to the associated subchamber 82, 83 via openings 73. Valves can be arranged in the openings 73.
  • the antechambers 84, 85 can be mutually connected to the high-pressure water line 13, which is guided in a tubular body 12, by means of closure members 86, 87, such as slides, cone or flap closures.
  • the tubular body 12 is connected to the nozzle housing 88 by means of a flange connection 33.
  • two high-pressure water lines 13, 13a can also be provided in the cylindrical tubular body 12, each of which is connected to one of the partial chambers 82, 83 (FIG. 2).
  • the high-pressure water lines 13, 13a are alternately pressurized with water depending on the desired operation.
  • FIG. 3 is another diffuser nozzle 138 shown, which can be used to propel and maneuver a surface ship.
  • the annular chamber 58 formed by an outer annular chamber wall 76 and an inner annular chamber wall 77 is divided into two annular chambers 48, 48a, each with a nozzle-shaped annular slot 79, by means of a separating web 81.
  • This annular chamber 58 is connected to a bushing 142 by means of radially arranged webs 60, the end sections of which are designed as annular web-like side walls 64 projecting from bearing plates 143, 144.
  • a nozzle cone 97 with a hydraulically profiled hub 101 is arranged between the side walls 64 in order to form a nozzle ring 98 and is mounted with the associated nozzle cone shaft 95 in a shaft bearing 66 on the bearing plates 143, 144.
  • Each nozzle taper shank 95 is axially adjustable by means of a holding and adjusting device 105.
  • a sealing device 104 designed as a bearing, which is designed as a sealing ring and can be made of plastic.
  • the respective nozzle ring 98 is formed by slot-like recesses 107, 108, 109 arranged on the edge of the nozzle cone (FIG.
  • the recesses 107, 108, 109 are preferably aligned with the central axis 93 at an angle of approximately 4 ° to 12 ° in such a way that their bottom surfaces 110, 111, 112 are designed with different inclinations to the central axis 93.
  • Radial webs 78 are arranged in the ring slot 79, through which nozzles 62 are formed.
  • Two pressure lines 139, 140 are provided in the pressure pipe section 65, each of which is assigned to a partial chamber 48, 48a. Pressurized water can flow from the respective annular chamber 48, 48a into the associated flow chamber 116a via high-pressure lines 61 formed in the webs 60.
  • the feed chambers 116a are formed between the side walls 64 and the nozzle taper shafts 95.
  • This diffuser nozzle 138 is particularly suitable for rapid reversing processes. It is only necessary to apply pressurized water to the respectively desired annular chamber 48, 48a. Changing the direction of travel when driving forwards and backwards does not require horizontal pivoting of the diffuser nozzle 138.
  • it can, as described for the nozzle bodies 38, be mounted in a bearing 53 on a cantilever arm formed as a projection 52 at the rear 3 of the ship.
  • the diffuser nozzle 138 can also be provided with transverse jet nozzles 145, 146, which are arranged horizontally aligned in the outer annular chamber wall 76 of the annular chamber 58, which is indicated in FIG. 4 by dashed lines.
  • the supply of the cross-jet nozzles 145, 146 with pressurized water takes place through a pressure line led through the pressure pipe section 65, which is connected to the connecting lines 148, 149; 150, 151 is connected.
  • a motor-operated valve 152, 153 is arranged in each of the connecting lines 148, 150, through which the cross-jet nozzles 145, 146 can be switched on or off.
  • the pressurized water is supplied by a high pressure pump.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Nozzles (AREA)
  • Jet Pumps And Other Pumps (AREA)

Description

Die Erfindung betrifft einen Strahlantrieb für Schiffe mit mindestens einem Düsenkranz, der heckseitig an einer unter Wasser angeordneten Halteeinrichtung befestigt und mit mindestens einer motorisch betriebenen Hochdruckpumpe verbunden ist, dessen düsenförmige Auslaßöffnungen allgemein horizontal ausgerichtet sind, mit einem auslaßseitigen kreisförmigen Düsenschlitz und einem Diffusor, durch den mittels des aus der düsenförmigen Auslaßöffnung austretenden Druckwassers weiteres Wasser zur Vergrößerung der aus dem Düsenkörper austretenden Wassermenge angesaugt wird.The invention relates to a jet propulsion system for ships with at least one nozzle ring, which is attached at the stern to a holding device arranged under water and is connected to at least one motor-operated high-pressure pump, the nozzle-shaped outlet openings of which are generally horizontally aligned, with an outlet-side circular nozzle slot and a diffuser through which by means of the pressurized water emerging from the nozzle-shaped outlet opening, further water is drawn in to increase the amount of water emerging from the nozzle body.

Es ist bekannt, zum Schiffsantrieb Schiffsschrauben zu verwenden, die von einem Mantel umgeben sind und hierdurch einen gerichteten Strahl zum Vortrieb des Schiffes erzeugen. Der Nachteil dieser Anordnung besteht darin, daß zum Antrieb auch dieser Schiffsschraube die bei üblichen Schiffsschrauben notwendigen umfangreichen mechanischen Einrichtungen wie Antriebswellen, Getriebe und dergleichen erforderlich sind. Für reine Manövrierzwecke ist es ferner bekannt, rein hydraulisch wirkende Quersteuereinrichtungen zu verwenden, mittels denen allgemein rechtwinklig oder winklig zur Schiffslängsachse Wasserstrahlen ausgestoßen werden können, um durch Impulswirkung bestimmte Richtungsänderungen des Schiffes zu bewirken. Für den Vortrieb eines Schiffes sind derartige Einrichtungen nicht geeignet. Ein Strahlantrieb der eingangs genannten Art ist in der DE-A 2828787 beschrieben. In diesem Triebwerk ist ein Diffusorring vorgesehen, in dem ein rotationssymmetrischer kegelförmig ausgebildeter Füllkörper unter Ausbildung eines ringförmigen Austrittsquerschnitts für Wasser angeordnet ist. Der Austrittsquerschnitt kann durch Verschieben des Füllkörpers eingestellt werden. Vor dem Diffusorring ist ein ringförmiger Kanal mit einem dem Diffusorring zugewandten Ringschlitz vorgesehen. Aus diesem tritt Treibwasser in den Diffusorring und soll durch den Innenraum des ringförmigen Kanals durch Induktion Saugwasser ansaugen. Hierbei besteht jedoch der Nachteil, daß bei in den Diffusorring eingeschobenem Füllkörper aufgrund auftretender Sekundärwirbel praktisch kein Saugwasser vom Treibwasserstrom angesaugt wird. Wenn der Füllkörper aus dem Diffusorring herausgezogen wird, wird der aus dem Diffusorring austretende Wasserstrahl radial zur Strahllängsachse aufgefächert, wodurch die Querkomponenten des Wasserstrahls die Bildung von Wirbeln und somit eine relative Verminderung des Vorschubs bewirken. Dieser Nachteil des bekannten Strahlantriebs hat dazu geführt, daß ein Einsatz für den Antrieb von Schiffen nicht erfolgte.It is known to use propellers for ship propulsion, which are surrounded by a jacket and thereby generate a directed jet for propelling the ship. The disadvantage of this arrangement is that the extensive mechanical devices such as drive shafts, gears and the like required for conventional propellers are also required to drive this propeller. For pure maneuvering purposes, it is also known to use purely hydraulic transverse control devices, by means of which water jets can be ejected generally at right angles or at an angle to the longitudinal axis of the ship, in order to effect certain changes in the direction of the ship through the action of an impulse. Such devices are not suitable for propelling a ship. A jet drive of the type mentioned is described in DE-A 2828787. In this engine, a diffuser ring is provided, in which a rotationally symmetrical conical filler body is arranged to form an annular outlet cross section for water. The outlet cross-section can be adjusted by moving the packing. An annular channel with an annular slot facing the diffuser ring is provided in front of the diffuser ring. From this, propellant water enters the diffuser ring and is intended to draw in suction water through the interior of the annular channel by induction. Here, however, there is the disadvantage that when the packing is inserted into the diffuser ring, practically no suction water is sucked in by the motive water flow due to secondary vortices occurring. When the packing is pulled out of the diffuser ring, the water jet emerging from the diffuser ring is fanned out radially to the longitudinal axis of the jet, as a result of which the transverse components of the water jet cause the formation of vortices and thus a relative reduction in the feed. This disadvantage of the known jet propulsion has led to the fact that it was not used for propelling ships.

Die Aufgabe der Erfindung besteht darin, den Strahlantrieb der eingangs genannten Art so zu verbessern, daß der Strahlantrieb hydrodynamisch günstiger und sowohl zum Vortrieb des Schiffes wie auch zu dessen Manövrierung geeignet ist.The object of the invention is to improve the jet propulsion of the type mentioned at the outset in such a way that the jet propulsion is hydrodynamically more favorable and is suitable both for propelling the ship and for maneuvering it.

Erfindungsgemäß erfolgt die Lösung der Aufgabe durch die gekennzeichnenden Merkmale der Ansprüche 1 oder 2. Ausgestaltungen der Erfindung werden in den abhängigen Ansprüchen beschrieben. In den Zeichnungen sind Ausführungsformen der Erfindung dargestellt, die nachstehend näher erläutert werden. Es zeigt :

  • Fig. 1 und 2 Ausbildungen eines Düsenkörpers in schematischen Seitenansichten,
  • Fig. 3 die Ausbildung einer Diffusordüse in einer schematischen Seitenansicht,
  • Fig. 4 die Diffusordüse nach Fig. 3 in einer Ansicht in Richtung C.
According to the invention, the object is achieved by the characterizing features of claims 1 or 2. Embodiments of the invention are described in the dependent claims. In the drawings, embodiments of the invention are shown, which are explained in more detail below. It shows :
  • 1 and 2 embodiments of a nozzle body in schematic side views,
  • 3 shows the design of a diffuser nozzle in a schematic side view,
  • 4 shows the diffuser nozzle according to FIG. 3 in a view in the direction C.

Der in den Figuren 1 und 2 dargestellte Düsenkörper 38 ist in einem Lager 53 gelagert, das auf einem am Heck 3 des Schiffes angeordneten Vorsprung 52 befestigt ist. Dieser Vorsprung 52 ist als über den Hecksteven 54 vorragender Kragarm ausgebildet. Der Kragarm kann konstruktiv mit dem Kiel des Schiffes verbunden sein.The nozzle body 38 shown in FIGS. 1 and 2 is mounted in a bearing 53 which is fastened on a projection 52 arranged on the stern 3 of the ship. This projection 52 is designed as a cantilever arm projecting over the stern stay 54. The cantilever can be structurally connected to the keel of the ship.

Das Düsengehäuse 88 des Düsenkörpers 38 besteht aus einer rotationssymmetrischen Ringkammer 41, die mittels eines Trennstegs 81 in zwei Teilkammern 82, 83 unterteilt ist. Die Teilkammern 82, 83 sind alternativ mit Druckwasser beaufschlagbar und jeweils mit einer rotationssymmetrischen Ringkammer 48, 48a verbunden. Diese weisen an den den Teilkamem 82, 83 abgewandten Endabschnitten durch die Ausrichtung der äußeren Ringkammerwände 46, 76 und der inneren Ringkammerwände 45, 77 bedingt ringschlitzartig ausgebildete düsenförmige Auslaßöffnungen 43, 80 auf. Die inneren Ringkammerwände 45, 77 der Ringkammem 41, 48, 48a sind derart ausgebildet, daß der von diesen umgebene rotationssymmetrische Ansaugkanal 40 im Bereich der Ringkammer 41 den geringsten Durchmesser hat und sich zu den öffnungsseitigen Endabschnitten diffusorartig erweitert. Vor den Teilkammern 82, 83 ist druckwassereinströmseitig jeweils eine Vorkammer 84, 85 ausgebildet, die über Durchbrechungen 73 mit der zugehörigen Teilkammer 82, 83 verbunden ist. In den Durchbrechungen 73 können Ventile angeordnet sein. Die Vorkammern 84, 85 sind mittels Verschlußgliedem 86, 87 wie Schiebern, Kegel- oder Klappenverschlüssen wechselseitig mit der Hochdruckwasserleitung 13 verbindbar, die in einem Rohrkörper 12 geführt ist. Der Rohrkörper 12 ist mittels einer Flanschverbindung 33 mit dem Düsengehäuse 88 verbunden.The nozzle housing 88 of the nozzle body 38 consists of a rotationally symmetrical ring chamber 41, which is divided into two partial chambers 82, 83 by means of a separating web 81. The partial chambers 82, 83 can alternatively be pressurized with pressurized water and each connected to a rotationally symmetrical ring chamber 48, 48a. At the end sections facing away from the partial chambers 82, 83, due to the alignment of the outer annular chamber walls 46, 76 and the inner annular chamber walls 45, 77, these have conditionally annular slot-like outlet openings 43, 80. The inner annular chamber walls 45, 77 of the annular chambers 41, 48, 48a are designed such that the rotationally symmetrical suction channel 40 surrounded by them has the smallest diameter in the region of the annular chamber 41 and widens in a diffuser-like manner towards the opening-side end sections. A prechamber 84, 85 is formed in front of the subchambers 82, 83 on the pressure water inflow side and is connected to the associated subchamber 82, 83 via openings 73. Valves can be arranged in the openings 73. The antechambers 84, 85 can be mutually connected to the high-pressure water line 13, which is guided in a tubular body 12, by means of closure members 86, 87, such as slides, cone or flap closures. The tubular body 12 is connected to the nozzle housing 88 by means of a flange connection 33.

In einer weiteren Ausgestaltung können in dem zylindrischen Rohrkörper 12 auch zwei Hochdruckwasserleitungen 13, 13a vorgesehen sein, von denen jede jeweils mit einer der Teilkammem 82, 83 verbunden ist (Fig. 2). Die Hochdruckwasserleitungen 13, 13a werden je nach gewünschten Betrieb wechselweise mit Druckwasser beaufschlagt.In a further embodiment, two high-pressure water lines 13, 13a can also be provided in the cylindrical tubular body 12, each of which is connected to one of the partial chambers 82, 83 (FIG. 2). The high-pressure water lines 13, 13a are alternately pressurized with water depending on the desired operation.

In Fig. 3 ist eine weitere Diffusordüse 138 dargestellt, die zum Vortrieb und zur Manövrierung eines Überwasserschiffs verwendet werden kann. Bei dieser Diffusordüse 138 ist die durch eine äußere Ringkammerwand 76 und eine innere Ringkammerwand 77 gebildete Ringkammer 58 mittels eines Trennstegs 81 in zwei Ringkammern 48, 48a mit jeweils einem düsenförmigen Ringschlitz 79 unterteilt. Mittels radial angeordneter Stege 60 ist diese Ringkammer 58 mit einer Buchse 142 verbunden, deren Endabschnitte als gegenüber Lagerplatten 143, 144 vorkragende ringstegartige Seitenwände 64 ausgebildet sind. Zwischen den Seitenwänden 64 ist zur Ausbildung eines Düsenkranzes 98 jeweils ein Düsenkegel 97 mit einer hydraulisch profilierten Nabe 101 angeordnet und mit dem jeweils zugehörigen Düsenkegelschaft 95 in einem Schaftlager 66 an den Lagerplatten 143, 144 gelagert. Jeder Düsenkegelschaft 95 ist mittels einer Halte- und Einstellvorrichtung 105 axial verstellbar. Zwischen den Düsenkegeln 97 und den Seitenwänden 64 ist eine als Lager ausgebildete Dichtungseinrichtung 104 vorgesehen, die als Dichtungsring ausgebildet und aus Kunststoff bestehen kann. Der jeweilige Düsenkranz 98 ist durch randseitig am Düsenkegel angeordnete schlitzartige Ausnehmungen 107, 108, 109 gebildet (Fig.4), die zur Mittelachse 93 der Diffusordüse 138 nach außen gerichtet sind. Vorzugsweise werden die Ausnehmungen 107, 108, 109 zur Mittelachse 93 in einem Winkel von etwa 4° bis 12° so ausgerichtet, daß deren Bodenflächen 110, 111, 112 zur Mittelachse 93 unterschiedlich geneigt ausgebildet sind. In dem Ringschlitz 79 sind radiale Stege 78 angeordnet, durch die Düsen 62 ausgebildet werden.3 is another diffuser nozzle 138 shown, which can be used to propel and maneuver a surface ship. In this diffuser nozzle 138, the annular chamber 58 formed by an outer annular chamber wall 76 and an inner annular chamber wall 77 is divided into two annular chambers 48, 48a, each with a nozzle-shaped annular slot 79, by means of a separating web 81. This annular chamber 58 is connected to a bushing 142 by means of radially arranged webs 60, the end sections of which are designed as annular web-like side walls 64 projecting from bearing plates 143, 144. A nozzle cone 97 with a hydraulically profiled hub 101 is arranged between the side walls 64 in order to form a nozzle ring 98 and is mounted with the associated nozzle cone shaft 95 in a shaft bearing 66 on the bearing plates 143, 144. Each nozzle taper shank 95 is axially adjustable by means of a holding and adjusting device 105. Between the nozzle cones 97 and the side walls 64 there is provided a sealing device 104 designed as a bearing, which is designed as a sealing ring and can be made of plastic. The respective nozzle ring 98 is formed by slot-like recesses 107, 108, 109 arranged on the edge of the nozzle cone (FIG. 4), which are directed outwards to the central axis 93 of the diffuser nozzle 138. The recesses 107, 108, 109 are preferably aligned with the central axis 93 at an angle of approximately 4 ° to 12 ° in such a way that their bottom surfaces 110, 111, 112 are designed with different inclinations to the central axis 93. Radial webs 78 are arranged in the ring slot 79, through which nozzles 62 are formed.

In dem Druckrohrabschnitt 65 sind zwei Druckleitungen 139, 140 vorgesehen, die jeweils einer Teilkammer 48, 48a zugeordnet sind. Über in den Stegen 60 ausgebildete Hochdruckleitungen 61 kann Druckwasser von der jeweiligen Ringkammer 48, 48a in die zugehörigen Vorlaufkammer 116a strömen.Two pressure lines 139, 140 are provided in the pressure pipe section 65, each of which is assigned to a partial chamber 48, 48a. Pressurized water can flow from the respective annular chamber 48, 48a into the associated flow chamber 116a via high-pressure lines 61 formed in the webs 60.

Die Vorlaufkammem 116a sind zwischen den Seitenwänden 64 und den Düsenkegelschäften 95 ausgebildet. Diese Diffusordüse 138 eignet sich besonders für schnelle Umsteuerungsvorgänge. Es muß lediglich die jeweils gewünschte Ringkammer 48, 48a mit Druckwasser beaufschlagt werden. Fahrtrichtungswechsel bei der Vorwärts- und Rückwärtsfahrt erfordern kein horizontales Verschwenken der Diffusordüse 138. Um die Diffusordüse 138 um die vertikale Achse 6 verschwenken zu können, kann sie wie zu den Düsenkörpem 38 beschrieben in einem Lager 53 auf einem als Vorsprung 52 ausgebildeten Kragarm am Heck 3 des Schiffes gelagert sein.The feed chambers 116a are formed between the side walls 64 and the nozzle taper shafts 95. This diffuser nozzle 138 is particularly suitable for rapid reversing processes. It is only necessary to apply pressurized water to the respectively desired annular chamber 48, 48a. Changing the direction of travel when driving forwards and backwards does not require horizontal pivoting of the diffuser nozzle 138. In order to be able to pivot the diffuser nozzle 138 about the vertical axis 6, it can, as described for the nozzle bodies 38, be mounted in a bearing 53 on a cantilever arm formed as a projection 52 at the rear 3 of the ship.

Die Diffusordüse 138 kann auch mit Querstrahldüsen 145, 146 versehen werden, die in der äußeren Ringkammerwand 76 der Ringkammer 58 horizontal ausgerichtet angeordnet werden, was in Fig. 4 durch Strichlinien angedeutet ist. Die Versorgung der Querstrahldüsen 145, 146 mit Druckwasser erfolgt durch eine durch den Druckrohrabschnitt 65 geführte Druckleitung, die mit in den Stegen 60 verlegten Anschlußleitungen 148, 149 ; 150, 151 verbunden ist. In den Anschlußleitungen 148, 150 ist jeweils ein motorisch betriebenes Ventil 152, 153 angeordnet, durch die die Querstrahldüsen 145, 146 ein- oder ausgeschaltet werden können. Die Druckwasserversorgung erfolgt über eine Hochdruckpumpe.The diffuser nozzle 138 can also be provided with transverse jet nozzles 145, 146, which are arranged horizontally aligned in the outer annular chamber wall 76 of the annular chamber 58, which is indicated in FIG. 4 by dashed lines. The supply of the cross-jet nozzles 145, 146 with pressurized water takes place through a pressure line led through the pressure pipe section 65, which is connected to the connecting lines 148, 149; 150, 151 is connected. A motor-operated valve 152, 153 is arranged in each of the connecting lines 148, 150, through which the cross-jet nozzles 145, 146 can be switched on or off. The pressurized water is supplied by a high pressure pump.

Claims (13)

1. Jet propulsion for ships having at least one nozzle body which is attached on the stem side to a holding device arranged underwater and is connected with at least one motor-driven high-pressure pump, the nozzle-shaped outlet of said jet propulsion being aligned generally horizontally, with a circular nozzle port on the outlet side and a diffuser through which, by means of the pressurised water coming out of the nozzle-shaped outlet, further water is sucked in in order to increase the quantity of water coming out of the nozzle body, characterised in that the at least one high-pressure pump is connected with a rotationally symmetrical annular chamber (41) which is subdivided by means of a separating bar (81) into two sectional chambers (82, 83) which can alternately be impacted with pressurised water and are connected in each case with a rotationally symmetrical annular chamber (48, 48a), annuluslike nozzle-shaped outlets (43, 80) being arranged on the end sections of the latter that are turned away from the sectional chambers (82, 83), the annular chamber walls (45, 77) of the annular chambers (41, 48, 48a) being designed in such a way that the rotationally symmetrical suction channel (40) surrounded by these has the smallest diameter in the area of the annular chamber (41) and widens at the end sections on the opening side in a diffuser-like manner.
2. Jet propulsion for ships having at least one nozzle body which is attached on the stern side to a holding device arranged underwater and is connected with at least one motor-driven high-pressure pump, the nozzle-shaped outlet of said jet propulsion being aligned generally horizontally, with an annulus-shaped nozzle port on the outlet side and a diffuser through which, by means of the pressurised water coming out of the nozzle-shaped outlet, further water is sucked in in order to increase the quantity of water coming out of the nozzle body, characterised in that a rotationally symmetrical annular chamber (58) is provided which surrounds a suction channel (40) which widens at the end sections at the opening side in a diffuser-like manner, whereby the annular chamber (58) is subdivided by means of a separating bar (81) into two annular chambers (48, 48a) each with a nozzle-shaped annular slit (79) in that each annular chamber (48, 48a) is connected with a pressure line (139, 140), said pressure lines being arranged in a pressure pipe section (65) arranged on the annular chamber (58) said pressure pipe section being connected with the high-pressure pump, in that the annular chamber (58) is connected with a bushing (142) by means of bars (60) arranged radially on the inside, the end sections of which are designed as annulus-like sidewalls projecting in relation to bearing plates (143, 144) between which, for the formation of a nozzle ring (98) a nozzle cone (97) with a boss (101) is arranged in each case, is mounted with the nozzle cone shank (95) in a shank support (66) on the bearing plate (143, 144) and is axially adjustable by means of a holding and setting device (105), and in that the annular chambers (58) are connected by means of high-pressure pipes led through the bars (60) with the preliminary chamber (116a) formed by the nozzle cone (97) and the nozzle cone shank (95) inside the annulus-like sidewall (64).
3. Jet propulsion according to claims 1 and 2, characterised in that between the annular chamber walls (76, 77) of the annular chambers (48, 48a) radial bars (78) are arranged.
4. Jet propulsion according to claim 1, characterised in that, on the side where the pressurised water flows in, in front of sectional chambers (82, 83) an antechamber (84, 85) is formed in each case which is connected by means of openings (73) with the appropriate sectional chamber (82, 83).
5. Jet propulsion according to claim 4, characterised in that valves are arranged in the openings (73) by means of which in each case one of the sectional chambers (82, 83) can be impacted with pressurised water, and in that the antechambers (84, 85) can be connected reciprocally with the high-pressure water pipe (13) by means of locking members (86, 87) such as bolts, conical covers or hinged covers.
6. Jet propulsion according to claims 4 and 5, characterised in that two high-pressure water pipes (13, 13a) which can be impacted alternately with pressurised water are arranged in the pipe body (12) connected with nozzle housing (88), each of said high-pressure water pipes being connected with one of the sectional chambers (82, 83).
7. Jet propulsion according to claims 2 and 3, characterised in that between the nozzle cones (97) and the sidewalls (64) a sealing device designed as a bearing is arranged as a sealing ring (104).
8. Jet propulsion according to claim 2, characterised in that the holding and setting device (105) has a servomotor which is connected with a control device.
9. Jet propulsion according to claim 2, characterised in that slit-shaped recesses coaxial to the median axis (93) are formed for the formation of the nozzle ring (98) in the area of the end sections of the sidewalls (64) on the opening side on the nozzle cone (97).
10. Jet propulsion according to claim 9, characterised in that the recesses (107, 108, 109) are arranged in a repetitive manner on the perimeter of the nozzle cone (97) and their base surfaces (110, 111, 112) are arranged at varying angles to the median axis (93).
11. Jet propulsion according to Claim 1, characterised in that the angle of the base surface (110, 111, 112) to the median axis (93) is approximately 4° to 12°.
12. Jet propulsion according to Claims 1 to 11, characterised in that in the annular chamber wall (76) of annular chambers (48, 48a, 58) at least one horizontal transverse blast nozzle is arranged in each case, said transverse blast nozzles lying opposite one another and being able to be connected, by means of connecting lines (148, 149, 150, 151) with motor-driven valves (152, 153) with a pressure line (147) led through the pressure pipe section (65).
13. Jet propulsion according to claim 11, characterised in that the connecting lines (148, 149, 150, 151) are led through the bars (60).
EP19850103200 1984-03-19 1985-03-19 Jet drive Expired EP0157287B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3409974 1984-03-19
DE3409974 1984-03-19
DE19843417245 DE3417245A1 (en) 1984-03-19 1984-05-10 Jet propulsion
DE3417245 1984-05-10
DE19843433810 DE3433810A1 (en) 1984-09-14 1984-09-14 Jet propulsion
DE3433810 1984-09-14

Publications (3)

Publication Number Publication Date
EP0157287A2 EP0157287A2 (en) 1985-10-09
EP0157287A3 EP0157287A3 (en) 1987-01-14
EP0157287B1 true EP0157287B1 (en) 1989-10-11

Family

ID=27191808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850103200 Expired EP0157287B1 (en) 1984-03-19 1985-03-19 Jet drive

Country Status (1)

Country Link
EP (1) EP0157287B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH447856A (en) * 1967-01-13 1967-11-30 Mercatura Ag Reaction drive for watercraft
US3447324A (en) * 1967-10-18 1969-06-03 Howard V French Water jet propulsion means
FR2029245A5 (en) * 1969-01-21 1970-10-16 Scitivaux De Greische
DE2107486A1 (en) * 1971-02-17 1972-08-31 Fehrs H Propulsion device for watercraft
DE2828787C2 (en) * 1977-07-16 1984-04-19 Jastram-Werke Gmbh Kg, 2050 Hamburg Maneuvering engine for watercraft

Also Published As

Publication number Publication date
EP0157287A2 (en) 1985-10-09
EP0157287A3 (en) 1987-01-14

Similar Documents

Publication Publication Date Title
DE69311998T2 (en) HELICONIC DRIVE SYSTEM FOR WATER VEHICLES
DE3877721T2 (en) JET NOZZLE FOR DRIVING A APPARATUS ALONG A TUBE AND APPARATUS, PROVIDED WITH SUCH A JET NOZZLE.
DE2315447C3 (en) Water jet propulsion for propulsion and steering of watercraft
EP0157287B1 (en) Jet drive
DE3735409C2 (en) Water jet propulsion
DE10314057B3 (en) Snorkel device for a submarine comprises a vertically extending head unit consisting of a column containing a fresh air tube and an exhaust gas tube and provided along its water flow
DE1506372A1 (en) Additional thrust generator on watercraft
DE29619385U1 (en) Ship propulsion with a rudder propeller
DE3518883A1 (en) Hydrofoil boat, consisting of a hull with planing elements
DE69923211T2 (en) DEVICE FOR DRIVING SHIPS AND NOZZLES THEREFOR
DE3433810A1 (en) Jet propulsion
DE3503642A1 (en) Submarine with rudder and hydroplane
DE3518353C2 (en) Jet propulsion for ships
DE1210352B (en) Bow thruster control device for watercraft
AT139524B (en) Marine propulsion for screw ships.
CH447856A (en) Reaction drive for watercraft
DE2234828C3 (en) Jet steering for ships
DE3343605C2 (en)
DE3504434A1 (en) Surface vessel with jet propulsion
DE596431C (en) Device for improving the propulsion efficiency of vehicles by deflecting the propeller jets at an acute angle to the direction of travel
DE2001252C3 (en) Liquid jet propulsion for watercraft
DE2251468B3 (en) Water vehicle e.g. ship, drive efficiency improving method, involves reducing frictional resistance of rotary drive propeller by adding water-soluble, flowable, strong polar and linear polymer of high molecular weight in boundary layer
DE3417245A1 (en) Jet propulsion
DE2052816C3 (en) Thrust booster for propulsion working in water or air
DE2046868A1 (en) Control, stabilization or similar surfaces having element for bodies moving in flowing media, as well as ships or similar vehicles with such an element

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE FR GB IT NL SE

17P Request for examination filed

Effective date: 19870227

17Q First examination report despatched

Effective date: 19871030

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE FR GB IT NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19891011

Ref country code: BE

Effective date: 19891011

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19891011

Ref country code: GB

Effective date: 19891011

Ref country code: NL

Effective date: 19891011

Ref country code: SE

Effective date: 19891011

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed