EP0464739A1 - Water jet propulsion for ships used in low water depths - Google Patents

Water jet propulsion for ships used in low water depths Download PDF

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Publication number
EP0464739A1
EP0464739A1 EP91110861A EP91110861A EP0464739A1 EP 0464739 A1 EP0464739 A1 EP 0464739A1 EP 91110861 A EP91110861 A EP 91110861A EP 91110861 A EP91110861 A EP 91110861A EP 0464739 A1 EP0464739 A1 EP 0464739A1
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EP
European Patent Office
Prior art keywords
base plate
impeller
water
water jet
pressure housing
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Granted
Application number
EP91110861A
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German (de)
French (fr)
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EP0464739B1 (en
Inventor
Siegfried Dipl.-Ing. Lais
Gerd Krautkrämer
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Schottel GmbH and Co KG
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Schottel GmbH and Co KG
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Publication of EP0464739A1 publication Critical patent/EP0464739A1/en
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    • 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
    • B63H11/101—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof having means for deflecting jet into a propulsive direction substantially parallel to the plane of the pump outlet opening
    • B63H11/102—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof having means for deflecting jet into a propulsive direction substantially parallel to the plane of the pump outlet opening the inlet opening and the outlet opening of the pump being substantially coplanar

Definitions

  • a vertical, tubular shaft is installed in the ship's hull, the lower end of which lies in the essentially horizontal plane: 1 1 e the essentially flat floor of the for use also records certain ships in extremely shallow waters.
  • a semiaxial impeller is rotatably arranged in this shaft about a vertical axis which coincides with the longitudinal axis of the shaft. This impeller sucks water axially in its inlet in order to convey it obliquely upwards in the blade channels.
  • the pumped water enters a spiral housing, from which it emerges through a nozzle, the jet energy determining the propulsion of the ship and the jet direction of its direction of movement.
  • the shaft is closed at the bottom by a cover, in which the suction opening for the water to be sucked in by the impeller is arranged concentrically.
  • An outlet opening can be provided at any point of the pressure housing or “pot” in order to effect the propulsion of the ship and to determine the direction of propulsion or direction of travel of the ship.
  • a plurality of outlet openings can also be provided in an appropriate assignment to one another and to the housing.
  • the drive device also has a cylindrical or pot-shaped pressure vessel 1 which is installed in the ship with a vertical longitudinal axis, is closed at the bottom by a base plate 3, at the top by the cover plate 27 stiffened by ribs 27a, and is coaxial with it Longitudinal axis receives the semi-axially bladed impeller 2, which is followed by a guide vane ring 5, which largely converts the flow energy that prevails in the region of the outlet edges of the blades of the impeller 2 into pressure energy.
  • the axial water inlet 4 in the pressure housing 1 is integrated concentrically to the longitudinal axis of the housing in the base plate 3, in which three outlet nozzles 10, 11, 12 are arranged and formed symmetrically to a vertical diameter plane 16a (FIG. 2).
  • the axially sucked in water through the inlet 4 is directed obliquely upwards in the impeller 2 and, after the diffuser with the guide vane ring 5, is supplied to the outlet nozzles 10 to 12 in order to leave them obliquely downwards (FIG. 1). Accordingly, there is only a very small flow in the pressure chamber 6 of the pressure housing 1 because the flow energy is largely converted into pressure energy.
  • the base plate 3 has no mechanical connection. Rather, there is an annular gap between the pressure housing wall and the base plate 3, which is largely sealed watertight by seals.
  • sealing rings 17 are held in a vertical, cylindrical edge 16, which bear against an annular, wear-resistant and rust-free insert 18 stiffening the shaft 1 in the region of its lower edge.
  • Each of the three sealing rings 17 provided is made of a sealing material, it is an open ring which springs radially and which is installed relative to the other two rings in such a way that the joints of the three open rings are as small as possible, but also offset against one another in the circumferential direction are, so that the joint of the middle ring lies behind an uninterrupted section of both the above and the sealing ring lying below it and on top of that the joint of the top ring is circumferentially offset from the joint of the lowest sealing ring. This provides an optimal labyrinth seal with regard to the operational requirements.
  • the water inlet 4 integrated in the base plate 3 is an inward-looking, cuff-shaped guide body 19 which has a flow-restricting flow-restricting contour and, at the same time, serves as a suction grille with ribs 20.
  • a control shaft 21 is held firmly with its lower end centrally in the inlet 4, so that rotary movements of the control shaft 21 can be transmitted in both circumferential directions via the webs 20 to the base plate 3 in order to determine the exit direction from the water nozzles 10 to be able to change up to 12 emerging water jets 13, 14, 15.
  • the rotary movements of the control shaft 21 are effected via a gear transmission 22, 23, the flange 24 of which is flanged to transmit power to the output shaft of a suitable servomotor, not shown.
  • the upper end of the control shaft 21 and gear wheel 22, 23 are arranged in the upper region of a dome-like housing 25, the gear wheel being a worm gear, the worm 23 of which is guided with its shaft 26 out of the housing 25 and outside the housing 25 at the end the connecting flange 26 wearing.
  • Worm gear 22 on the one hand and worm 23, shaft 26 and flange 24 on the other hand are arranged in different planes parallel to the image plane, so that the worm 23 is brought tangentially to and engages in particular on the back of the worm wheel 22.
  • the housing cover plate 27 is arranged, which is designed as an annular plate with stiffening ribs 27a and detachably on the outer edge with the upper shaft edge or a horizontal flange 28 stiffening it and also releasably on the inner edge with an annular flange 29 of the dome-like housing 25 is connected, wherein screw connections 30 are symbolically represented as releasable fastening means.
  • the blades of the guide vane ring 5 are fastened to the underside of the housing cover plate 27, the cover plate 27 being contoured so that it is one of the cover disks of the blade channel boundaries.
  • the other cover plate 31 serves to limit the blade channels and ends in a cylinder section 31 a, between which and the inlet guide body 19 there is a wire roller bearing 32.
  • the wire roller bearing 32 is made of a stainless steel and is lubricated by the surrounding medium (water). Foreign bodies in the medium, such as dirt and sand, are kept away from the wire roller bearing 32 by felt rings 33, 34, which are also lubricated by the medium (FIG. 4). With this arrangement, no oil-grease lubrication is required, the storage is environmentally friendly and maintenance-free.
  • the entire base plate 3 is endlessly controllable about its longitudinal axis, which is the longitudinal axis of the control shaft 21, so that the full horizontal thrust is available in any control direction.
  • the control shaft 21 is guided coaxially through the power transmission shaft 35, which is designed as a hollow shaft and ends below the gear 22, 23 in the dome-like housing 25 and at this upper end rotatably carries a bevel gear 36, onto which and thus the power transmission shaft 35 the drive torque for the impeller 2 is transmitted from a suitable drive motor, not shown, by means of a counter wheel 37 and its shaft, which is led out of the dome-like housing 25, and a coupling flange 38.
  • the power transmission shaft 35 is guided by means of two axially offset rotary bearings 39, 40 in a tube 41, which is held concentrically in the plane of the flange 29 in the dome-like housing 25 at its lower end, the two tube ends and the rotary bearings 39, 40 above or below this level. Below the lower end of the tube 41, the impeller 2 with its hub is rotatably mounted on the power transmission shaft 35.
  • the worm drive 22, 23 can, in addition to the previously usual electrical or hydraulic control, also be controlled mechanically, which is seen as an advantage according to the invention.
  • the reason for this possibility is that the control torques in both directions of rotation are the same and above all very low. This is mainly made possible by the symmetrical type order of the outlet nozzles 10 to 12 and the seal 17 according to the invention.
  • the seal between the base plate 3 and the pressure housing 1 via the labyrinth seal with the sealing piston rings 17 makes it possible to manage with low control torques. This is because there is no stick-slip effect, in which the two parts to be moved and sealed against each other would run the risk of the seals stuck to one or both parts at standstill and being torn off and destroyed when one part was turned on with considerable torque. Although this danger does not exist in the application according to the invention of the sealing rings 17 designed as open, radially resilient “piston rings”, they are made of largely wear-resistant plastic material in an “open design”. When installed, they are radially preloaded like a spring. There is no increase in friction which hinders the rotation of the impeller 2 due to the pressure in the pressure chamber 6.
  • the previously mentioned insert 18, which is designed as a welded-in or in some other way, for example shrink-fit, wear ring made of stainless steel serves as the mating surface of the rotor against which the seals 17 abut.
  • the inner wall of the pot or pressure housing 1 above the insert 18 is smooth and without heels and forms the base plate 3 with the impeller 2, diffuser 5, 27a, 31 and pressure housing cover 27 with ribs 27a, a structural unit which is supported on the upper end of the pressure housing and there is releasably connected to this so that this unit can be removed after loosening the connections.
  • the assembly is detachably connected to the pressure housing. while at the lower end there is a horizontally spring-loaded seal to the pressure housing by means of the sealing rings, the latter also functioning reliably in view of inevitable manufacturing inaccuracies, in particular non-roundness, over a long operating time.
  • the three water pressure outlets 10 to 12 arranged symmetrically to the vertical diameter plane 16a were found to be the optimal solution according to the invention.
  • one outlet nozzle 11 or the pair of outlet nozzles 10, 12 can possibly also be used as long as the one outlet nozzle 11 or the pair of outlet nozzles 10, 12 is or are arranged symmetrically to the diameter plane 16a.

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Hydraulic Turbines (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Logic Circuits (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Motor Or Generator Frames (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Earth Drilling (AREA)
  • Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
  • Nozzles (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Massaging Devices (AREA)

Abstract

An impeller with semiaxial blading and a vertical axis of rotation is rotatably arranged in a well-shaped thrust housing. The drive for the impeller is inserted into the thrust housing from above through a cover plate, and the thrust housing is closed at the bottom by a base plate which has a water inlet, arranged concentrically in the centre, for the axial flow of water against the impeller and at least one water outlet inclined at a slight angle. Arranged between the discharge end of the delivery passages of the impeller and the at least one water outlet is a baffle apparatus in which the flow energy of the water delivered by the impeller is converted to the greatest possible extent into thrust energy. The base plate (3) is structurally separate from the well-shaped thrust housing (1) and its cover plate (27), and the thrust housing is integrated in the supporting structure (42) of the ship as an integral component of it. The base plate together with the water inlet (4) integrated in it and the at least one water outlet (11) can be continuously rotated about the longitudinal axis of the thrust housing in both peripheral directions. <IMAGE>

Description

Bei einem sogenannten Pumpjet, wie er hier als bisher praktizierter Stand der Technik zugrundegelegt wird, ist im Schiffsrumpf ein vertikaler, rohrförmiger Schacht eingebaut, dessen unteres Ende in der im wesentlichen horizontalen Ebene lieg: 11e den im wesentlichen ebenen Boden des für den Einsatz auch in extrem flachen Gewässern bestimmten Schiffs aufnimmt. In diesem Schacht ist um eine vertikale Achse, die mit der Längsachse des Schachts zusammenfällt, drehbar ein halbaxiales Laufrad angeordnet. Dieses Laufrad saugt in seinem Einlaß Wasser axial an, um es in den Schaufelkanälen schräg nach oben zu fördern. Das geförderte Wasser gelangt in ein Spiralgehäuse, aus dem es durch eine Düse hindurch austritt, wobei die Strahlenergie den Vortrieb des Schiffes bestimmt und die Strahlrichtung dessen Bewegungsrichtung. Nach unten ist der Schacht durch einen Deckel verschlossen, in dem konzentrisch die Ansaugöffnung für das vom Laufrad anzusaugende Wasser angeordnet ist.In a so-called pump jet, as it is used here as the state of the art practiced so far, a vertical, tubular shaft is installed in the ship's hull, the lower end of which lies in the essentially horizontal plane: 1 1 e the essentially flat floor of the for use also records certain ships in extremely shallow waters. A semiaxial impeller is rotatably arranged in this shaft about a vertical axis which coincides with the longitudinal axis of the shaft. This impeller sucks water axially in its inlet in order to convey it obliquely upwards in the blade channels. The pumped water enters a spiral housing, from which it emerges through a nozzle, the jet energy determining the propulsion of the ship and the jet direction of its direction of movement. The shaft is closed at the bottom by a cover, in which the suction opening for the water to be sucked in by the impeller is arranged concentrically.

Dieses Prinzip wurde bei einer sogenannten Topfpumpe nach der DE-OS 37 35 699 insofern verlassen, als das Laufrad statt in ein Spiralgehäuse zu fördern, in einen feststehenden Leitschaufelkranz fördert, der so ausgebildet ist. daß an den Austrittsenden der Strömungskanäle die am Eintrittsende dieser Kanäle vorliegende Strömungsenergie weitestgehend in Druckenergie umgesetzt ist. Der Schacht ist nicht mehr im Schiffsrumpf fest eingebaut, sondern ein um seine Längsachse drehbares Druckgehäuse, und er umschließt zusammen mit der Bodenplatte eine Druckkammer, in der sich das geförderte Wasser mit dem Druck befindet, wie er sich am Austrittsende des Leitschaufelkranzes einstellt. An jeder beliebigen Stelle des Druckgehäuses oder "Topfes" kann eine Austrittsöffnung angebracht werden, um den Vortrieb des Schiffes zu bewirken und die Vortriebsrichtung bzw. Fahrtrichtung des Schiffes zu bestimmen. Statt dieser einen Austrittsöffnung kann auch eine Mehrzahl von Austrittsöffnungen in zweckentsprechender Zuordnung zueinander und zum Gehäuse vorgesehen werden. Durch Schwenken des Druckgehäuses kann die Austrittsrichtung des oder der das Gehäuse verlassenden Strahls bzw. Strahlen bestimmt werden, um damit die Schubrichtung bzw. die Fahrtrichtung des Schiffes bestimmen zu können. Damit ist ein für neu erachtetes Antriebssystem aufgezeigt, ohne daß aber angegeben wird, wie dieses Prinzip in die Praxis umgesetzt werden könnte.This principle was abandoned in a so-called pot pump according to DE-OS 37 35 699 insofar as the impeller, instead of being conveyed into a spiral housing, conveys it into a fixed guide vane ring which is designed in this way. that at the outlet ends of the flow channels the flow energy present at the inlet end of these channels is largely converted into pressure energy. The shaft is no longer permanently installed in the ship's hull, but a pressure housing that can be rotated about its longitudinal axis, and together with the base plate, it encloses a pressure chamber in which the pumped water is at the pressure as it occurs at the outlet end of the guide vane ring. An outlet opening can be provided at any point of the pressure housing or “pot” in order to effect the propulsion of the ship and to determine the direction of propulsion or direction of travel of the ship. Instead of this one outlet opening, a plurality of outlet openings can also be provided in an appropriate assignment to one another and to the housing. By swiveling the pressure housing, the exit direction of the jet or jets leaving the housing can be determined in order to be able to determine the direction of thrust or the direction of travel of the ship. This shows a drive system considered to be new, but without specifying how this principle could be put into practice.

Hier setzt nun die vorliegende Erfindung ein indem sie eine in besonders zweckmäßiger Weise in der Praxis realisierbare Bauweise einer solchen Topfpumpe aufzeigt. Die Merkmale einer erfindungsgemäßen Pumpe ergeben sich aus den Patentansprüchen. Die Pumpe ist nachfolgend anhand der Zeichnung näher beschrieben. In der Zeichnung zeigen:

  • Fig. 1 einen vertikalen Schnitt nach der Linie I-I in Fig. 3,
  • Fig. 2 einen entsprechenden Schnitt nach der Linie 11-11 in Fig. 3,
  • Fig. 3 eine vertikale Ansicht auf die Unterseite der Pumpe gemäß Fig. 1,2 und
  • Fig. 4 eine Einzelheit der Anordnung, die in Fig. 1 etwa durch den Kreis A umschrieben ist, in größerer Darstellung.
This is where the present invention comes in by showing a construction of such a pot pump that can be implemented in practice in a particularly expedient manner. The features of a pump according to the invention result from the patent claims. The pump is described below with reference to the drawing. The drawing shows:
  • 1 is a vertical section along the line II in Fig. 3,
  • 2 shows a corresponding section along the line 11-11 in Fig. 3,
  • Fig. 3 is a vertical view of the underside of the pump shown in FIGS. 1,2 and
  • Fig. 4 shows a detail of the arrangement, which is circumscribed by the circle A in Fig. 1, in a larger representation.

Wie an sich bereits bekannt, weist auch die erfindungsgemäße Antriebsvorrichtung einen zylindrischen bzw. topfförmigen Druckbehälter 1 auf, der mit vertikaler Längsachse im Schiff eingebaut ist, unten durch eine Bodenplatte 3, oben durch die mit Rippen 27a versteifte Deckplatte 27 verschlossen ist und gleichachsig zu seiner Längsachse das halbaxial beschaufelte Laufrad 2 aufnimmt, dem ein Leitschaufelkranz 5 nachgeschaltet ist, der weitestgehend die Strömungsenergie, die im Bereich der Auslaßkanten der Schaufeln des Laufrades 2 herrscht, in Druckenergie umsetzt. Der axiale Wassereinlaß 4 in das Druckgehäuse 1 ist konzentrisch zur Gehäuselängsachse in die Bodenplatte 3 integriert, in die auch drei Auslaßdüsen 10,11,12 symmetrisch zu einer vertikalen Durchmesserebene 16a (Fig. 2) angeordnet und ausgebildet sind. Das axial durch den Einlaß 4 angesaugte Wasser wird im Laufrad 2 in eine Richtung schräg nach oben gelenkt und nach dem Leitapparat mit dem Leitschaufelkranz 5 den Auslaßdüsen 10 bis 12 zugeführt, um diese schräg nach unten gerichtet zu verlassen (Fig. 1). In der Druckkammer 6 des Druckgehäuses 1 liegt demzufolge nur eine sehr geringe Strömung vor, weil die Strömungsenergie eben weitestgehend in Druckenergie umgesetzt ist. Der Strömungsverlauf von der zentrischen Eintrittsöffnung 4 in der Bodenplatte 3 bis zum Eintritt in die Druckkammer 6 bzw. zum Ende der Strömungskanäle des Leitschaufelkranzes sind durch Pfeile 7 (ansaugen), 8 (Durchtritt durch die Strömungskanäle des Laufrades 2) und 9 (Durchtritt durch die Strömungskanäle des Leitschaufelkranzes) gekennzeichnet. Der Austritt des Wassers aus der Druckkammer 6 erfolgt über die drei in gleicher Weise und parallel schräg nach unten gerichteten in die Bodenplatte 3 integrierten Auslaßdüsen 10,11 und 12 entsprechend den Pfeilen 13,14 und 15. Da die drei Auslaßdüsen 10,11 und 12 in der Draufsicht gemäß Fig. 3 bezüglich der vertikalen Längsmittelebene 16 symmetrisch angeordnet sind, treten bei der Rundumsteuerung in beide Drehrichtungen mit oder gegen den Uhrzeigersinn keine unterschiedlichen und obendrein noch sehr niedrige Steuermomente auf, was die Lagerung des Antriebs vereinfacht und die Steuerung des Schiffes erleichtert. Zwischen dem zylindrischen Druckgehäuse 1 und der Bodenplatte 3 besteht abweichend vom Stand der Technik keine mechanische Verbindung. Es besteht vielmehr ein Ringspalt zwischen Druckgehäusewand und Bodenplatte 3, der weitgehend durch Dichtungen wasserdicht abgedichtet ist. Hierzu sind in einem vertikalen, zylindrischen Rand 16 Dichtungsringe 17 gehalten, die an einem den Schacht 1 im Bereich seines unteren Randes versteifenden ringförmigen, verschleißfesten und nichtrostenden Einsatz 18 anliegen. Jeder der vorgesehenen drei Dichtungsringe 17 besteht aus einem dichtenden Werkstoff, er ist ein offener Ring, der radial federt und der so relativ zu den beiden anderen Ringen eingebaut ist, daß die Stöße der drei offenen Ringe möglichst klein, aber obendrein noch in Umfangsrichtung gegeneinander versetzt sind, so daß der Stoß des mittleren Ringes hinter einem nicht unterbrochenen Abschnitt sowohl des oberhalb als auch des unterhalb von ihm liegenden Dichtungsringes liegt und obendrein ist der Stoß des obersten Ringes in Umfangsrichtung gegenüber dem Stoß des untersten Dichtungsringes versetzt. Es ist damit im Hinblick auf die Betriebsanforderungen eine optimale Labyrinthdichtung gegeben.As already known per se, the drive device according to the invention also has a cylindrical or pot-shaped pressure vessel 1 which is installed in the ship with a vertical longitudinal axis, is closed at the bottom by a base plate 3, at the top by the cover plate 27 stiffened by ribs 27a, and is coaxial with it Longitudinal axis receives the semi-axially bladed impeller 2, which is followed by a guide vane ring 5, which largely converts the flow energy that prevails in the region of the outlet edges of the blades of the impeller 2 into pressure energy. The axial water inlet 4 in the pressure housing 1 is integrated concentrically to the longitudinal axis of the housing in the base plate 3, in which three outlet nozzles 10, 11, 12 are arranged and formed symmetrically to a vertical diameter plane 16a (FIG. 2). The axially sucked in water through the inlet 4 is directed obliquely upwards in the impeller 2 and, after the diffuser with the guide vane ring 5, is supplied to the outlet nozzles 10 to 12 in order to leave them obliquely downwards (FIG. 1). Accordingly, there is only a very small flow in the pressure chamber 6 of the pressure housing 1 because the flow energy is largely converted into pressure energy. The flow path from the central inlet opening 4 in the base plate 3 to the entry into the pressure chamber 6 or to the end of the flow channels of the guide vane ring are shown by arrows 7 (suction), 8 (passage through the flow channels of the impeller 2) and 9 (passage through the Flow channels of the guide vane ring). The water emerges from the pressure chamber 6 via the three outlet nozzles 10, 11 and 12 integrated in the bottom plate 3 in the same manner and parallel and obliquely downwards in accordance with the arrows 13, 14 and 15. Since the three outlet nozzles 10, 11 and 12 3 are arranged symmetrically with respect to the vertical longitudinal center plane 16, with the all-round control in both directions of rotation with or counterclockwise no different and, on top of that, still very low control torques occur, which simplifies the mounting of the drive and facilitates the control of the ship . Between the cylindrical pressure housing 1 and In contrast to the prior art, the base plate 3 has no mechanical connection. Rather, there is an annular gap between the pressure housing wall and the base plate 3, which is largely sealed watertight by seals. For this purpose, sealing rings 17 are held in a vertical, cylindrical edge 16, which bear against an annular, wear-resistant and rust-free insert 18 stiffening the shaft 1 in the region of its lower edge. Each of the three sealing rings 17 provided is made of a sealing material, it is an open ring which springs radially and which is installed relative to the other two rings in such a way that the joints of the three open rings are as small as possible, but also offset against one another in the circumferential direction are, so that the joint of the middle ring lies behind an uninterrupted section of both the above and the sealing ring lying below it and on top of that the joint of the top ring is circumferentially offset from the joint of the lowest sealing ring. This provides an optimal labyrinth seal with regard to the operational requirements.

Der in die Bodenplatte 3 integrierte Wassereinlaß 4 ist ein nach innen weisender stulpenförmiger Leitkörper 19, der eine die Strömung begrenzende strömungsgünstige Kontur hat, und mit Rippen 20 gleichzeitig als Ansaugschutzgitter dient. Über mehrere dieser radialen Rippen 20 ist zentrisch im Einlaß 4 eine Steuerwelle 21 mit ihrem unteren Ende fest gehalten, so daß Drehbewegungen der Steuerwelle 21 in beiden Umfangsrichtungen über die Stege 20 auf die Bodenplatte 3 übertragen werden können, um die Austrittsrichtung der aus den Wasserdüsen 10 bis 12 austretenden Wasserstrahlen 13,14,15 verändern zu können. Die Drehbewegungen der Steuerwelle 21 werden über ein Zahnradgetriebe 22,23 bewirkt, dessen Flansch 24 an die Abtriebswelle eines geeigneten, nicht dargestellten Stellmotors kraftübertragend angeflanscht ist. Oberes Ende der Steuerwelle 21 und Zahnradgetriebe 22,23 sind im oberen Bereich eines domartigen Gehäuses 25 angeordnet, wobei das Zahnradgetriebe ein Schneckengetriebe ist, dessen Schnecke 23 mit ihrer Welle 26 aus dem Gehäuse 25 herausgeführt ist und außerhalb des Gehäuses 25 am Ende den Anschlußflansch 26 trägt. Schnekkenrad 22 einerseits und Schnecke 23, Welle 26 und Flansch 24 andererseits sind in verschiedenen, zur Bildebene parallelen Ebenen angeordnet, so daß die Schnecke 23 insbesondere auf der Rückseite des Schneckenrades 22 tangential an dieses herangeführt ist und in dieses eingreift.The water inlet 4 integrated in the base plate 3 is an inward-looking, cuff-shaped guide body 19 which has a flow-restricting flow-restricting contour and, at the same time, serves as a suction grille with ribs 20. About several of these radial ribs 20, a control shaft 21 is held firmly with its lower end centrally in the inlet 4, so that rotary movements of the control shaft 21 can be transmitted in both circumferential directions via the webs 20 to the base plate 3 in order to determine the exit direction from the water nozzles 10 to be able to change up to 12 emerging water jets 13, 14, 15. The rotary movements of the control shaft 21 are effected via a gear transmission 22, 23, the flange 24 of which is flanged to transmit power to the output shaft of a suitable servomotor, not shown. The upper end of the control shaft 21 and gear wheel 22, 23 are arranged in the upper region of a dome-like housing 25, the gear wheel being a worm gear, the worm 23 of which is guided with its shaft 26 out of the housing 25 and outside the housing 25 at the end the connecting flange 26 wearing. Worm gear 22 on the one hand and worm 23, shaft 26 and flange 24 on the other hand are arranged in different planes parallel to the image plane, so that the worm 23 is brought tangentially to and engages in particular on the back of the worm wheel 22.

Zwischen dem Druckgehäuse 1 und dem domartigen Gehäuse 25 ist die Gehäusedeckplatte 27 angeordnet, die als Ringplatte mit Versteifungsrippen 27a ausgebildet ist und am Außenrand lösbar mit dem oberen Schachtrand bzw. einem diesen versteifenden Horizontalflansch 28 und am Innenrand ebenfalls lösbar mit einem Ringflansch 29 des domartigen Gehäuses 25 verbunden ist, wobei als lösbare Befestigungsmittel Schraubenverbindungen 30 symbolisch dargestellt sind. An der Unterseite der Gehäusedeckplatte 27 sind die Schaufel des Leitschaufelkranzes 5 befestigt, wobei die Deckplatte 27 so konturiert ist, daß sie eine der Deckscheiben der Schaufelkanalbegrenzungen ist. Die andere Deckscheibe 31 dient der unteren Begrenzung der Schaufelkanäle und endet in einem Zylinderabschnitt 31 a, zwischen dem und der Einlaßleitkörper 19 sich ein Drahtwälzlager 32 befindet. Das Drahtwälzlager 32 ist aus einem nichtrostendem Stahl hergestellt und wird durch das umgebende Medium (Wasser) geschmiert. Sich im Medium befindende Fremdkörper, wie Schmutz und Sand, werden durch Filzringe 33,34, die ebenfalls durch das Medium geschmiert werden, vom Drahtwälzlager 32 ferngehalten (Fig. 4). Es ist durch diese Anordnung keine Öl-Fettschmierung erforderlich, die Lagerung ist umweltfreundlich und wartungsfrei. Die gesamte Bodenplatte 3 ist um ihre Längsachse, die die Längsachse der Steuerwelle 21 ist, endlos steuerbar, so daß in jeder beliebigen Steuerrichtung die volle horizontale Schubkraft zur Verfügung steht.Between the pressure housing 1 and the dome-like housing 25, the housing cover plate 27 is arranged, which is designed as an annular plate with stiffening ribs 27a and detachably on the outer edge with the upper shaft edge or a horizontal flange 28 stiffening it and also releasably on the inner edge with an annular flange 29 of the dome-like housing 25 is connected, wherein screw connections 30 are symbolically represented as releasable fastening means. The blades of the guide vane ring 5 are fastened to the underside of the housing cover plate 27, the cover plate 27 being contoured so that it is one of the cover disks of the blade channel boundaries. The other cover plate 31 serves to limit the blade channels and ends in a cylinder section 31 a, between which and the inlet guide body 19 there is a wire roller bearing 32. The wire roller bearing 32 is made of a stainless steel and is lubricated by the surrounding medium (water). Foreign bodies in the medium, such as dirt and sand, are kept away from the wire roller bearing 32 by felt rings 33, 34, which are also lubricated by the medium (FIG. 4). With this arrangement, no oil-grease lubrication is required, the storage is environmentally friendly and maintenance-free. The entire base plate 3 is endlessly controllable about its longitudinal axis, which is the longitudinal axis of the control shaft 21, so that the full horizontal thrust is available in any control direction.

Die Steuerwelle 21 ist koaxial durch die als Hohlwelle ausgeführte Kraftübertragungswelle 35 hindurchgeführt, die unterhalb des Getriebes 22,23 in dem domartigen Gehäuse 25 endet und an diesem oberen Ende drehfest ein Kegelrad 36 trägt, auf das und damit die Kraftübertragungswelle 35 das Antriebsdrehmoment für das Laufrad 2 mittels eines Gegenrades 37 und dessen aus dem domartigen Gehäuse 25 herausgeführten Welle sowie einem Kupplungsflansch 38 von einem nicht dargestellten geeigneten Antriebsmotor aus übertragen wird. Die Kraftübertragungswelle 35 ist mittels zweier axial gegeneinander versetzter Drehlager 39,40 in einem Rohr 41 geführt, das in der Ebene des Flansches 29 in dem domartigen Gehäuse 25 an dessen unterem Ende konzentrisch gehalten ist, wobei die beiden Rohrenden und die Drehlager 39,40 oberhalb bzw. unterhalb dieser Ebene liegen. Unterhalb des unteren Endes des Rohres 41 ist auf der Kraftübertragungswelle 35 das Laufrad 2 mit seiner Nabe drehfest gelagert.The control shaft 21 is guided coaxially through the power transmission shaft 35, which is designed as a hollow shaft and ends below the gear 22, 23 in the dome-like housing 25 and at this upper end rotatably carries a bevel gear 36, onto which and thus the power transmission shaft 35 the drive torque for the impeller 2 is transmitted from a suitable drive motor, not shown, by means of a counter wheel 37 and its shaft, which is led out of the dome-like housing 25, and a coupling flange 38. The power transmission shaft 35 is guided by means of two axially offset rotary bearings 39, 40 in a tube 41, which is held concentrically in the plane of the flange 29 in the dome-like housing 25 at its lower end, the two tube ends and the rotary bearings 39, 40 above or below this level. Below the lower end of the tube 41, the impeller 2 with its hub is rotatably mounted on the power transmission shaft 35.

Der Schneckentrieb 22,23 kann, außer der bislang üblichen elektrischen oder hydraulischen Ansteuerung auch mechanisch angesteuert werden, worin ein erfindungsbedingter Vorteil gesehen wird. Der Grund für diese Möglichkeit liegt darin, daß die Steuermomente in beiden Drehrichtungen gleich und vor allem sehr niedrig sind. Dies wird hauptsächlich ermöglicht durch die symmetrische Anordnung der Auslaßdüsen 10 bis 12 und die erfindungsgemäß ausgeführte Abdichtung 17.The worm drive 22, 23 can, in addition to the previously usual electrical or hydraulic control, also be controlled mechanically, which is seen as an advantage according to the invention. The reason for this possibility is that the control torques in both directions of rotation are the same and above all very low. This is mainly made possible by the symmetrical type order of the outlet nozzles 10 to 12 and the seal 17 according to the invention.

Die Abdichtung zwischen der Bodenplatte 3 und dem Druckgehäuse 1 über die Labyrinthdichtung mit den dichtenden Kolbenringen 17 ermöglicht es, mit geringen Steuermomenten auszukommen. Es tritt nämlich kein stick-slip-Effekt auf, bei dem die beiden gegeneinander zu bewegenden und abzudichtenden Teile Gefahr laufen würden, daß beim Stillstand die Dichtungen an einem oder beiden Teilen festbacken und beim Andrehen des einen Teils mit erheblichem Drehmoment losgerissen und zerstört würden. Obwohl diese Gefahr bei der erfindungsgemäßen Anwendung der als offene, radial federnde "Kolbenringe" ausgeführten Dichtungsringe 17 nicht besteht, sind sie aus weitestgehend verschleißarmem Kunststoffmaterial in "offener Bauform" ausgeführt. Sie sind im eingebauten Zustand ähnlich einer Feder radial vorgespannt. Es tritt keine die Drehung des Laufrads 2 behindernde Reibungserhöhung durch den Druck in der Druckkammer 6 auf.The seal between the base plate 3 and the pressure housing 1 via the labyrinth seal with the sealing piston rings 17 makes it possible to manage with low control torques. This is because there is no stick-slip effect, in which the two parts to be moved and sealed against each other would run the risk of the seals stuck to one or both parts at standstill and being torn off and destroyed when one part was turned on with considerable torque. Although this danger does not exist in the application according to the invention of the sealing rings 17 designed as open, radially resilient “piston rings”, they are made of largely wear-resistant plastic material in an “open design”. When installed, they are radially preloaded like a spring. There is no increase in friction which hinders the rotation of the impeller 2 due to the pressure in the pressure chamber 6.

Montage und Demontage des gesamten Antriebs ist bei in der Schiffsstruktur verbleibendem Druckgehäuse 1 möglich, weshalb das Druckgehäuse 1 als Teil der Tragstruktur 42 des Schiffes in diese integriert werden kann.Assembly and disassembly of the entire drive is possible with the pressure housing 1 remaining in the ship structure, which is why the pressure housing 1 can be integrated into this as part of the support structure 42 of the ship.

Als Gegenlauffläche des Rotors, an der die Dichtungen 17 anliegen, dient der bereits genannte Einsatz 18, der als eingeschweißter oder in sonstiger Weise, beispielsweise Einschrumpfen, befestigter Schleißring aus nichtrostendem Stahl ausgeführt ist.The previously mentioned insert 18, which is designed as a welded-in or in some other way, for example shrink-fit, wear ring made of stainless steel serves as the mating surface of the rotor against which the seals 17 abut.

Ersichtlich ist die Innenwand des Topfes bzw Druckgehäuses 1 oberhalb des Einsatzes 18 glatt und absatzlos und bildet die Bodenplatte 3 mit Laufrad 2, Leitapparat 5, 27a, 31 und Druckgehäusedeckel 27 mit Rippen 27a eine Baueinheit, die auf dem oberen Ende des Druckgehäuses abgestützt und dort mit diesem lösbar verbunden ist, so daß diese Baueinheit nach dem Lösen der Verbindungen nach oben ausgebaut werden kann. Am oberen Ende ist die Baueinheit mit dem Druckgehäuse lösbar verbunden. während am unteren Ende mittels der Dichtungsringe eine horizontal gefederte Abdichtung zum Druckgehäuse gegeben ist, wobei letztere auch angesichts unvermeidbarer Fertigungsungenauigkeiten, insbesondere Unrundheiten über lange Betriebszeit hinweg zuverlässig funktioniert.As can be seen, the inner wall of the pot or pressure housing 1 above the insert 18 is smooth and without heels and forms the base plate 3 with the impeller 2, diffuser 5, 27a, 31 and pressure housing cover 27 with ribs 27a, a structural unit which is supported on the upper end of the pressure housing and there is releasably connected to this so that this unit can be removed after loosening the connections. At the upper end, the assembly is detachably connected to the pressure housing. while at the lower end there is a horizontally spring-loaded seal to the pressure housing by means of the sealing rings, the latter also functioning reliably in view of inevitable manufacturing inaccuracies, in particular non-roundness, over a long operating time.

Aus den insgesamt geschilderten Vorteilen der Anwendung der federnden, kolbenringartigen Dichtungsringe 17 ergibt sich, daß es sich hierbei um eine Lösung von erfinderischer Bedeutung handelt, die von der konkreten Ausbildung insbesondere des Laufrads und der Topfpumpe unabhängig ist.The overall advantages of using the resilient, piston ring-like sealing rings 17 show that this is a solution of inventive importance, which is independent of the specific design, in particular of the impeller and the pot pump.

Als optimale Lösung gemäß der Erfindung wurden die drei symmetrisch zur vertikalen Durchmesserebene 16a angeordneten Druckwasseraustritte 10 bis 12 befunden. Allerdings kann gegebenenfalls auch mit der einen Auslaßdüse 11 oder dem Auslaßdüsenpaar 10,12 auszukommen sein, solange die eine Auslaßdüse 11 oder das Auslaßdüsenpaar 10,12 symmetrisch zur Durchmesserebene 16a angeordnet ist bzw. sind.The three water pressure outlets 10 to 12 arranged symmetrically to the vertical diameter plane 16a were found to be the optimal solution according to the invention. However, one outlet nozzle 11 or the pair of outlet nozzles 10, 12 can possibly also be used as long as the one outlet nozzle 11 or the pair of outlet nozzles 10, 12 is or are arranged symmetrically to the diameter plane 16a.

Claims (15)

1. Wasserstrahlantrieb für Schiffe. die zum Einsatz in flachen Gewässern bestimmt sind, wobei ein halbaxial beschaufeltes Laufrad mit vertikaler Drehachse in einem brunnenförmigen Druckgehäuse drehbar angeordnet ist, in das von oben her durch eine Deckelplatte der Antrieb für das Laufrad eingeführt ist, das unten durch eine Bodenplatte verschlossen ist, die einen konzentrisch in der Mitte angeordneten Wassereinlaß für die axiale Anströmung des Laufrades und zumindest einen flach geneigten Wasserauslaß aufweist, wobei zwischen dem Austrittsende der Förderkanäle des Laufrades und dem zumindest einen Wasserauslaß ein Leitapparat angeordnet ist, in dem die Strömungsenergie des vom Laufrad geförderten Wassers weitestgehend in Druckenergie umgesetzt wird, dadurch gekennzeichnet, daß die Bodenplatte (3) vom brunnenförmigen Druckgehäuse (1) und dessen Deckplatte (27) baulich getrennt ist und daß das Druckgehäuse in die Tragstruktur (42) des Schiffes als dessen Bestandteil integriert ist, während die Bodenplatte mit in sie integriertem Wassereinlaß (4) und dem mindestens einen Wasserauslaß (11) um die Längsachse des Druckgehäuses in beiden Umfangsrichtungen endlos drehbar ist.1. Water jet propulsion for ships. which are intended for use in shallow waters, with a semi-axially bladed impeller with a vertical axis of rotation is rotatably arranged in a fountain-shaped pressure housing, into which the drive for the impeller is inserted from above through a cover plate, which is closed at the bottom by a base plate which has a concentrically arranged in the middle water inlet for the axial flow of the impeller and at least one gently inclined water outlet, a guide device being arranged between the outlet end of the conveying channels of the impeller and the at least one water outlet, in which the flow energy of the water conveyed by the impeller is largely in Pressure energy is converted, characterized in that the base plate (3) is structurally separate from the well-shaped pressure housing (1) and its cover plate (27) and that the pressure housing is integrated into the support structure (42) of the ship as a component thereof, while the base plate te with integrated water inlet (4) and the at least one water outlet (11) about the longitudinal axis of the pressure housing in both circumferential directions is endlessly rotatable. 2. Wasserstrahlantrieb nach Anspruch 1, gekennzeichnet durch eine Spaltabdichtung (17,18) zwischen dem Außenrand der Bodenplatte (3) und dem Druckgehäuse (1).2. Water jet drive according to claim 1, characterized by a gap seal (17, 18) between the outer edge of the base plate (3) and the pressure housing (1). 3. Wasserstrahlantrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Innenwand des Druckgehäuses (1) oberhalb des Bereiches der Bodenplatte (3) auf ihrer gesamten Länge glatt und ohne wesentliche Durchmesserveränderung ist, daß der Durchmesser dem Durchmesser der Bodenplatte (3) zuzüglich des von Abdichtungen (17) zu überbrückenden Spaltes ist und daß die Bodenplatte (3) mit dem Laufrad (2) und dem Leitapparat (5,27a,31) dem Gehäusedeckel (27,27a) zugeordnet ist, der auf dem Druckgehäuse nach oben ausbaubar abgestützt und lösbar mit ihm verbunden ist.3. Water jet drive according to claim 1 or 2, characterized in that the inner wall of the pressure housing (1) above the area of the base plate (3) over its entire length is smooth and without significant change in diameter that the diameter of the diameter of the base plate (3) plus of the gap (17) to be bridged and that the base plate (3) with the impeller (2) and the diffuser (5, 27a, 31) is assigned to the housing cover (27, 27a), which can be removed upwards on the pressure housing supported and releasably connected to it. 4. Wasserstrahlantrieb nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß eine mittlere Wasseraußlaßdüse (11) und zwei seitliche Wasserauslaßdüsen (10,12) symmetrisch zu einer vertikalen Durchmesserebene (16a) in die Bodenplatte (3) integriert sind.4. Water jet drive according to one of claims 1 to 3, characterized in that a central water outlet nozzle (11) and two lateral water outlet nozzles (10, 12) are integrated symmetrically to a vertical diameter plane (16a) in the base plate (3). 5. Wasserstrahlantrieb nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der in die Bodenplatte (3) integrierte zentrale vertikale Wassereinlaß (4) von der strömungsgünstig ausgebildeten Innenwand eines in das Innere des Druckgehäuses (1) stulpenförmig hineinragenden Leitkörpers (19) begrenzt wird.5. Water jet drive according to one of claims 1 to 4, characterized in that the central vertical water inlet (4) integrated in the base plate (3) from the aerodynamically designed inner wall of an inside of the pressure housing (1) protrudes cuff-like guide body (19) becomes. 6. Wasserstrahlantrieb nach Anspruch 5, dadurch gekennzeichnet, daß das obere Ende des Leitkörpers (19) in einem Zylinderabschnitt (31 a) der unteren Deckplatte (31,31 a) des Leitapparates (5,27a,31 ) gelagert ist, dessen obere Deckplatte (27,27a) die Deckplatte des Druckgehäuses (1) ist.6. Water jet drive according to claim 5, characterized in that the upper end of the guide body (19) in a cylinder section (31 a) of the lower cover plate (31, 31 a) of the guide apparatus (5, 27 a, 31) is mounted, the upper cover plate (27, 27a) is the cover plate of the pressure housing (1). 7. Wasserstrahlantrieb nach Anspruch 6, dadurch gekennzeichnet, daß die obere Deckplatte (27,27a) eine Ringscheibe (27) ist, auf deren Außenseite zur Versteifung Rippen (27a) aufgesetzt sind.7. Water jet drive according to claim 6, characterized in that the upper cover plate (27, 27a) is an annular disc (27), on the outside of which stiffening ribs (27a) are placed. 8. Wasserstrahlantrieb nach Anspruch 6, dadurch gekennzeichnet, daß die Lagerung des Leitkörpers (19) in dem Zylinderabschnitt (31 a) der unteren Deckplatte (31.31 a) des Leitapparates (5,27a.31) mittels eines wassergeschmierten Drahtlagers (32) erfolgt.8. Water jet drive according to claim 6, characterized in that the bearing of the guide body (19) in the cylinder section (31 a) of the lower cover plate (31.31 a) of the guide apparatus (5, 27a, 31) is carried out by means of a water-lubricated wire bearing (32). 9. Wasserstrahlantrieb nach Anspruch 8. gekennzeichnet durch Filzdichtungen (33,34) oberhalb und unterhalb des Drahtlagers (32), die wasserdurchlässig, nicht aber schmutzdurchlässig sind.9. Water jet drive according to claim 8, characterized by felt seals (33, 34) above and below the wire bearing (32) which are permeable to water but not permeable to dirt. 10. Wasserstrahlantrieb nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Abdichtung des Ringspaltes zwischen Druckgehäuse (1) und Bodenplatte (3) durch drei offene, in sich radial federnde Dichtringe (17) erfolgt, die in einem Zylinderabschnitt (16) der Bodenplatte gehalten sind und mit Vorspannung an einer verschleißarmen korrosionsbeständigen zylindrischen Reibplatte (18) am unteren Ende des Druckgehäuses anliegen.10. Water jet drive according to one of claims 1 to 8, characterized in that the sealing of the annular gap between the pressure housing (1) and the base plate (3) by three open, radially resilient sealing rings (17) is carried out in a cylinder section (16) the base plate are held and bear against a low-wear, corrosion-resistant cylindrical friction plate (18) at the lower end of the pressure housing. 11. Wasserstrahlantrieb nach Anspruch 10, dadurch gekennzeichnet, daß die Ringe (17) in Umfangsrichtung so gegeneinander versetzt eingebaut sind, daß jeder der Ringe mit seinem Stoß hinter einem durchgehenden Abschnitt des auf ihn folgenden Dichtungsrings liegt.11. Water jet drive according to claim 10, characterized in that the rings (17) are installed offset in the circumferential direction so that each of the rings lies with its joint behind a continuous section of the sealing ring following it. 12. Wasserstrahlantrieb nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Bodenplatte (3) mittels im Einlaßleitkörper (19) angeordneter Radialstege (20) auf dem unteren Ende einer Steuerwelle (21) befestigt ist, die koaxial zur Längsachse des Druckgehäuses (1) durch dieses hindurchgeführt ist, durch die obere Deckplatte (27,27a) des Druckgehäuses hindurchgeführt ist und oberhalb der oberen Deckplatte über ein Getriebe (22,23) an einen Steuermotor angeschlossen ist.12. Water jet drive according to one of claims 1 to 11, characterized in that the base plate (3) by means of arranged in the inlet guide body (19) arranged radial webs (20) on the lower end of a control shaft (21) which is coaxial to the longitudinal axis of the pressure housing ( 1) is passed through this, is passed through the upper cover plate (27, 27a) of the pressure housing and is connected to a control motor above the upper cover plate via a gear (22, 23). 13. Wasserstrahlantrieb nach Anspruch 12, dadurch gekennzeichnet, daß die Steuerwelle (21) durch die als Hohlwelle ausgebildete Kraftübertragungswelle (35) des Laufrades (2) koaxial hindurchgeführt ist, die zwischen der Deckplatte (27) des Druckgehäuses (1) und dem Getriebe (22,23) der Steuerwelle ein Getriebe (36,37) zum Anschluß an den Antriebsmotor des Laufrades aufweist.13. Water jet drive according to claim 12, characterized in that the control shaft (21) through the hollow shaft designed as a power transmission shaft (35) of the impeller (2) is passed coaxially between the cover plate (27) of the pressure housing (1) and the gear ( 22,23) of the control shaft has a gear (36,37) for connection to the drive motor of the impeller. 14. Wasserstrahlantrieb nach Anspruch 13, dadurch gekennzeichnet, daß Steuerwelle (21) und Kraftübertragungswelle (35) koaxial durch ein Rohr (41) hindurchgeführt sind, das in einem Flansch (29) gehalten ist, der eine konzentrische ringförmige Öffnung in der Deckplatte (27) des Druckgehäuses (1) zwischen dem Rohr und dem Innenrand der ringförmigen Deckplatte verschließt und ein domartiges Gehäuse (25) trägt, in dem die Getriebe (22,23;36,37) von Steuerwelle (21) und Kraftübertragungswelle (35) angeordnet sind.14. Water jet drive according to claim 13, characterized in that the control shaft (21) and power transmission shaft (35) are passed coaxially through a tube (41) which is held in a flange (29) which has a concentric annular opening in the cover plate (27th ) of the pressure housing (1) closes between the tube and the inner edge of the annular cover plate and carries a dome-like housing (25) in which the gears (22, 23; 36, 37) of the control shaft (21) and power transmission shaft (35) are arranged . 15. Wasserstrahlantrieb nach Anspruch 14, dadurch gekennzeichnet, daß die Kraftübertragungswelle (35) an jedem Ende des Rohres (41) in einem Drehlager (39,40) geführt ist.15. Water jet drive according to claim 14, characterized in that the power transmission shaft (35) is guided at each end of the tube (41) in a rotary bearing (39, 40).
EP91110861A 1990-07-04 1991-07-01 Water jet propulsion for ships used in low water depths Expired - Lifetime EP0464739B1 (en)

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DE4021340 1990-07-04
DE4021340A DE4021340A1 (en) 1990-07-04 1990-07-04 WATER JET DRIVE FOR SHIPS INTENDED FOR USE IN SHALLOW WATERS

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EP0464739B1 EP0464739B1 (en) 1994-10-05

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CN101758756A (en) * 2009-11-27 2010-06-30 王政中 Underwater advancing steering device for amphibious automobile
CN107477023B (en) * 2017-07-11 2023-09-29 高勋绿色智能装备(广州)有限公司 Multi-outlet convection pump with flow guiding system
RU192144U1 (en) * 2019-05-07 2019-09-04 Федеральное государственное бюджетное образовательное учреждение высшего образования "Рыбинский государственный авиационный технический университет имени П.А. Соловьева" JET WATER ENGINE
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DE3735699A1 (en) * 1987-10-22 1989-05-03 Schottel Werft Water-jet drive for watercraft

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ATE112530T1 (en) 1994-10-15
KR920002421A (en) 1992-02-28
YU86191A (en) 1994-11-15
JPH06278692A (en) 1994-10-04
HUT64277A (en) 1993-12-28
NO912608L (en) 1992-01-06
JP3349712B2 (en) 2002-11-25
ES2062623T3 (en) 1994-12-16
RU2041841C1 (en) 1995-08-20
DE4021340A1 (en) 1992-01-09
EP0464739B1 (en) 1994-10-05
NO174737B (en) 1994-03-21
NO912608D0 (en) 1991-07-03
US5146865A (en) 1992-09-15
CA2046157A1 (en) 1992-01-05
FI913225A (en) 1992-01-05
DK0464739T3 (en) 1994-10-31
NO174737C (en) 1994-06-29
PL290913A1 (en) 1992-04-21
FI913225A0 (en) 1991-07-03
DE59103158D1 (en) 1994-11-10
HU912268D0 (en) 1991-12-30
BR9102745A (en) 1992-02-04

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