EP0612657B1 - Water jet propulsion - Google Patents
Water jet propulsion Download PDFInfo
- Publication number
- EP0612657B1 EP0612657B1 EP94102485A EP94102485A EP0612657B1 EP 0612657 B1 EP0612657 B1 EP 0612657B1 EP 94102485 A EP94102485 A EP 94102485A EP 94102485 A EP94102485 A EP 94102485A EP 0612657 B1 EP0612657 B1 EP 0612657B1
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- Prior art keywords
- water
- impeller
- housing
- jet drive
- drive according
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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
- the invention relates to a water jet drive according to the preamble of claim 1.
- the guide device is a fixed blade ring, in which the blades are arranged in such a way that flow energy is largely converted into pressure energy in the blade channels or the guide device.
- the drive device which is preferably arranged behind the plane of the flat ship's bottom, sucks in water from the area below the ship's bottom, the sucked-in water is accelerated in the impeller, so that it has a high kinetic energy at the outlet of the impeller, which converts into pressure energy at the outlet from the diffuser is, after exiting from the guide apparatus and in the pressure housing, therefore has a high pressure energy and, because of this high pressure energy, can emerge from the pressure housing at any point in the pressure housing and can enter outlet nozzles which determine the direction of exit of the water jet causing the propulsion of the ship.
- the advantage of this solution is the free choice for the arrangement of the outlet nozzles, the disadvantage is a relatively complex construction (DE-A-4021340).
- the object of the present invention is to design a generic drive device such that it is structurally simpler and lighter than the known solution.
- the essential component groups of the water jet drive according to the invention are the pot-shaped pump housing 1, the semi-axially running blade or flow channels between its blades 2 forming pump impeller 3, the drive 4 of the impeller, the guide device 5 and a lower cover plate 6, in the middle of which the water inlet 7, a central outlet nozzle 8 and two side outlet nozzles 9, 10 are integrated.
- "Semi-axially bladed” means that the impeller 3 is axially flowed against and the water provided with flow energy leaves the impeller and enters the diffuser at an angle that is less than 90 ° with respect to the impeller axis of rotation.
- the drive 4 can be conventional, so that its description can be omitted.
- a relatively wide-meshed inlet grille 11 can be arranged in the inlet 7, which can be relatively wide-meshed because the drive is less sensitive to foreign particles carried in the water than a drive with a bladed guide device due to the lack of a bladed guide device.
- the diffuser is, according to one embodiment, an unbladed ring diffuser with an exit angle to the impeller axis between approximately 160 and 200 °, preferably 180 °.
- the ring diffuser or diffuser 5 is formed directly on the outside by the housing outer wall 12 and on the inside by the impeller housing 13. It is rotationally symmetrical and has no internals. It ensures long guidance to the outlet nozzles 8, 9 and 10.
- the inlet is asymmetrical with one end circle 14 and another end circle 15 offset from it.
- the asymmetrical suction geometry is designed in such a way that there is a low-cavitation inlet in the most frequently occurring operating states.
- the inventive design according to the embodiment avoids entry losses and ensures low exit losses in the diffuser, friction occurs only on the diffuser walls and not also on the blade walls.
- the long flow in the diffuser which is oriented toward the outlet nozzles 8 to 10, enables the exact maintenance of a desired flow pattern.
- the ring diffuser design with both radial and axial direction of action leads to a relatively small housing or well inside diameter. This in turn enables a compact design with a high thrust yield. This results in relatively large flow cross-sections, which also leads to a high thrust yield with a constant housing or well diameter (in relation to known solutions with bladed guide vanes), furthermore a low tendency to cavitation and the risk of contamination with the need for a coarse-meshed intake grille.
- the asymmetrical inlet causes only a slight tendency towards inlet cavitation, at least in the most frequently occurring operating state.
- the rotationally symmetrical diffuser without blades, the diffuser formation directly through the housing wall and impeller housing mean a relatively low manufacturing effort and lead to low weight, which is particularly important for large drives.
- the cross-sectional profile in the diffuser can be optimized, the deflection radii are to be determined in such a way that, despite the lack of guide vanes, a non-detachable flow through the diffuser is ensured.
- the entire water jet drive can be rotated in a known manner about the longitudinal axis of the impeller 7 in both circumferential directions without restriction or endlessly in order to be able to determine the exit direction of the water jets and thus the direction of propulsion of the driven watercraft.
- the base plate 6 with the nozzles 8 to 10 and the inlet 7 can be rotated in a corresponding manner with respect to the housing 1, which in this case can be integrated as a load-bearing assembly in the load-bearing ship structure.
- the outlet nozzles 8 to 10 ensure in all cases that water jets leave the drive at a flat angle, as can be seen in particular in FIG. 3, 4. It is therefore expedient in the invention that the diffuser is a non-bladed ring diffuser with an exit angle to the impeller axis between approximately 160 ° and 200 °, preferably 180 °.
- the known drive device Due to the vane ring formed by the guide vanes, the known drive device (DE-A-4021340) is relatively heavy, which is disadvantageous in particular when the drive device is large in diameter, that is to say in the case of drive devices with high power. It is characteristic here that the guide device with the guide vane ring acts exclusively in the radial direction, as a result of which the vane ducts must have a large length, as a result of which the drive device has a relatively large diameter, which, as mentioned, leads to high weight and can lead to installation problems. in that the drive device takes up space that is lost as usable space.
- the elimination of the blades compared to the prior art (DE-A-4021340) with the bladed diffuser makes the ring diffuser according to the invention considerably lighter, which is particularly important in large machines.
- the ringless diffuser according to the invention is designed so that the direction of action is not only radial but also axial. This means that compared to a drive with bladed diffuser with the same thrust yield, the housing becomes smaller and lighter, or a higher thrust is achieved with the same external dimensions and reduced weight.
- the latter version leads to a reduction in the risk of cavitation and the tendency to contamination due to the then larger flow cross sections.
- the water jet drive designed according to the invention ensures a long guide to the outlet nozzles 8, 9 and 10.
- the cross-sectional profile of the guide apparatus can increasingly be such that a conversion of speed energy into pressure energy is achieved (diffuser). However, the cross-sectional profile can also remain the same or even decrease.
- the swirl component that is to say the component pointing in the circumferential direction of the flow emerging from the impeller, is retained to a greater extent in the non-bladed guide apparatus than is possible with a guide apparatus bladed according to the prior art.
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Abstract
Description
Die Erfindung bezieht sich auf einen Wasserstrahlantrieb gemäß dem Gattungsbegriff des Anspruchs 1.The invention relates to a water jet drive according to the preamble of
Bei solchen sogenannten "Topfpumpen" ist der Leitapparat ein feststehender Schaufelkranz, bei dem die Schaufeln so angeordnet sind, daß in den Schaufelkanälen bzw. dem Leitapparat Strömungsenergie weitestgehend in Druckenergie umgesetzt wird. Die vorzugsweise hinter der Ebene des flachen Schiffbodens angeordnete Antriebsvorrichtung saugt Wasser aus dem Bereich unterhalb des Schiffbodens an, das angesaugte Wasser wird im Laufrad beschleunigt, so daß es am Austritt des Laufrades eine hohe kinetische Energie hat, die am Austritt aus dem Leitapparat in Druckenergie umgewandelt ist, nach dem Austritt aus dem Leitapparat und im Druckgehäuse also eine hohe Druckenergie hat und dieser hohen Druckenergie wegen an jeder beliebigen Stelle des Druckgehäuses aus dem Druckgehäuse ausund in Auslaßdüsen eintreten kann, die die Austrittsrichtung des den Vortrieb des Schiffes bewirkenden Wasserstrahles bestimmen. Der Vorteil dieser Lösung ist die freie Wahl für die Anordnung der Auslaßdüsen, der Nachteil ist einen relativ aufwendige Bauweise (DE-A-4021340).In such so-called "pot pumps", the guide device is a fixed blade ring, in which the blades are arranged in such a way that flow energy is largely converted into pressure energy in the blade channels or the guide device. The drive device, which is preferably arranged behind the plane of the flat ship's bottom, sucks in water from the area below the ship's bottom, the sucked-in water is accelerated in the impeller, so that it has a high kinetic energy at the outlet of the impeller, which converts into pressure energy at the outlet from the diffuser is, after exiting from the guide apparatus and in the pressure housing, therefore has a high pressure energy and, because of this high pressure energy, can emerge from the pressure housing at any point in the pressure housing and can enter outlet nozzles which determine the direction of exit of the water jet causing the propulsion of the ship. The advantage of this solution is the free choice for the arrangement of the outlet nozzles, the disadvantage is a relatively complex construction (DE-A-4021340).
Aufgabe der vorliegenden Erfindung ist die Ausbildung einer gattungsgemäßen Antriebseinrichtung derart, daß sie baulich einfacher und leichter als die bekannte Lösung ist.The object of the present invention is to design a generic drive device such that it is structurally simpler and lighter than the known solution.
In der GB-A-140 985 ist der Problematik bauliche Vereinfachung durch die Erkenntnis Rechnung getragen,daß bei einem Wasserstrahlantrieb die Konversion von Strömungs- in Druckenergie unnötig sei.In GB-A-140 985 the problem of structural simplification is taken into account by the knowledge that the conversion of flow energy into pressure energy is unnecessary in a water jet drive.
Der Lösung der Aufgabe dient die Ausbildung eines gattungsgemäßen Wasserstrahlantriebs gemäß dem Kennzeichnungsteil des Anspruchs 1, mit den Merkmalen der Unteransprüche wird der erfindungsgemäße Antrieb in zweckmäßiger Weise weiter ausgebildet.The solution to the problem is the formation of a generic water jet drive according to the characterizing part of
Ein erfindungsgemäßer Wasserstrahlantrieb ist in der Zeichnung schematisch dargestellt und nachfolgend erläutert. In der Zeichnung zeigen
- Fig. 1
- eine Ansicht auf die untere Deckplatte des Antriebs,
- Fig. 2
- einen Mittellängsschnitt durch den Antrieb und
- Fig. 3 und Fig. 4
- einen Schnitt nach der Linie III-III in Fig. 1,2 bzw. IV-IV in Fig. 1.
- Fig. 1
- a view of the lower cover plate of the drive,
- Fig. 2
- a central longitudinal section through the drive and
- 3 and 4
- a section along the line III-III in Fig. 1,2 and IV-IV in Fig. 1st
Die wesentlichen Bauteilgruppen des erfindungsgemäßen Wasserstrahlantriebs sind das topfförmige Pumpengehäuse 1, das halbaxial verlaufende Schaufel- bzw. Strömungskanäle zwischen seinen Schaufeln 2 bildende Pumpenlaufrad 3, der Antrieb 4 des Laufrades, der Leitapparat 5 und eine untere Deckplatte 6, in die in der Mitte der Wassereinlaß 7, eine mittlere Auslaßdüse 8 und zwei seitliche Auslaßdüsen 9,10 integriert sind. "Halbaxial beschaufelt" besagt, daß das Laufrad 3 axial angeströmt wird und das mit Strömungsenergie versehene Wasser das Laufrad verläßt und in den Leitapparat eintritt unter einem Winkel, der gegenüber der Laufraddrehachse geringer als 90° ist. Der Antrieb 4 kann konventionell sein, so daß auf seine Beschreibung verzichtet werden kann. Er ist auf einen Deckel des Pumpengehäuses 1 aufgesetzt und ragt in das Pumpengehäuse hinein, um dort mit dem Laufrad 3 drehfest verbunden zu sein. Er kann beispielsweise dem in DE-A-4021340 vorgesehenen Antrieb gleichen. Im Einlaß 7 kann ein relativ weitmaschiges Einlaßgitter 11 angeordnet sein, das deswegen relativ weitmaschig sein kann, weil der Antrieb infolge des Fehlens eines beschaufelten Leitapparates gegenüber im Wasser mitgeführten Fremdpartikeln unempfindlicher ist als ein Antrieb mit einem beschaufelten Leitapparat.The essential component groups of the water jet drive according to the invention are the pot-
Der Leitapparat ist nun erfindungsgemäß nach einer Ausführungsform ein unbeschaufelter Ringdiffusor mit einem Austrittswinkel zur Laufradachse zwischen etwa 160 und 200°, vorzugsweise 180°. Der Ringdiffusor bzw. Leitapparat 5 wird unmittelbar außen von der Gehäuseaußenwand 12 und innen vom Laufradgehäuse 13 gebildet. Er ist rotationssymmetrisch und weist keine Einbauten auf. Er gewährleistet eine lange Führung zu den Auslaßdüsen 8,9 und 10.According to the present invention, the diffuser is, according to one embodiment, an unbladed ring diffuser with an exit angle to the impeller axis between approximately 160 and 200 °, preferably 180 °. The ring diffuser or diffuser 5 is formed directly on the outside by the housing
Der Einlauf ist asymmetrisch mit einem Endkreis 14 und einem diesem gegenüber versetzten anderen Endkreis 15. Die asymmetrische Ansauggeometrie ist so ausgelegt, daß ein kavitationsarmer Einlauf bei den am häufigsten auftretenden Betriebszuständen gegeben ist.The inlet is asymmetrical with one
Die erfindungsgemäße Ausbildung nach der Ausführungsform vermeidet Eintrittsverluste und gewährleistet geringe Austrittsverluste im Diffusor, Reibung erfolgt nur an den Diffusorwänden und nicht auch an Schaufelwänden. Die lange, zu den Auslaßdüsen 8 bis 10 hin ausgerichtete Strömung im Diffusor ermöglicht die exakte Einhaltung eines gewollten Strömungsverlaufes. Die Ringdiffusorausbildung mit sowohl radialer als auch axialer Wirkrichtung führt zu einem relativ kleinen Gehäuse- bzw. Brunneninnendurchmesser. Dadurch wiederum ist eine kompakte Bauweise bei hoher Schubausbeute möglich. Dadurch ergeben sich weiter relativ große Strömungsquerschnitte, was ebenfalls zu hoher Schubausbeute bei konstantem Gehäuse- bzw. Brunnendurchmesser (in Relation zu bekannten Lösungen mit beschaufeltem Leitapparat), darüber hinaus geringer Kavitationsneigung und Verschmutzungsgefahr mit der Notwendigkeit allenfalls eines grobmaschigen Ansauggitters führt. Der asymmetrische Einlauf bewirkt eine nur geringe Neigung zur Einlaufkavitation zumindest in den am häufigsten auftretenden Betriebszustand. Der rotationssymmetrische Diffusor ohne Schaufeln, die Diffusorbildung unmittelbar durch Gehäusewand und Laufradgehäuse bedeuten einen verhältnismäßig geringen Fertigungsaufwand und führen zu geringem Gewicht, was besonders bei großen Antrieben wichtig ist.The inventive design according to the embodiment avoids entry losses and ensures low exit losses in the diffuser, friction occurs only on the diffuser walls and not also on the blade walls. The long flow in the diffuser, which is oriented toward the outlet nozzles 8 to 10, enables the exact maintenance of a desired flow pattern. The ring diffuser design with both radial and axial direction of action leads to a relatively small housing or well inside diameter. This in turn enables a compact design with a high thrust yield. This results in relatively large flow cross-sections, which also leads to a high thrust yield with a constant housing or well diameter (in relation to known solutions with bladed guide vanes), furthermore a low tendency to cavitation and the risk of contamination with the need for a coarse-meshed intake grille. The asymmetrical inlet causes only a slight tendency towards inlet cavitation, at least in the most frequently occurring operating state. The rotationally symmetrical diffuser without blades, the diffuser formation directly through the housing wall and impeller housing mean a relatively low manufacturing effort and lead to low weight, which is particularly important for large drives.
Der Querschnittsverlauf im Diffusor ist optimierbar, die Umlenkradien sind so zu bestimmen, daß trotz der fehlenden Leitschaufeln eine ablösungsfreie Durchströmung des Diffusors gewährleistet ist.The cross-sectional profile in the diffuser can be optimized, the deflection radii are to be determined in such a way that, despite the lack of guide vanes, a non-detachable flow through the diffuser is ensured.
Der gesamte Wasserstrahlantrieb ist in bekannter Weise um die Längsachse des Laufrades 7 in beiden Umfangsrichtungen uneingeschränkt bzw. endlos drehbar, um die Austrittsrichtung der Wasserstrahlen und damit die Vortriebsrichtung des angetriebenen Wasserfahrzeugs bestimmen zu können. Zum gleichen Zweck kann die Bodenplatte 6 mit den Düsen 8 bis 10 und dem Einlaß 7 in entsprechender Weise gegenüber dem Gehäuse 1 drehbar sein, das in diesem Fall als mittragende Baugruppe in die tragende Schiffskonstruktion integriert sein kann.The entire water jet drive can be rotated in a known manner about the longitudinal axis of the
Die Auslaßdüsen 8 bis 10 gewährleisten in allen Fällen, daß Wasserstrahlen unter einem flachen Winkel den Antrieb verlassen, wie es insbesondere Fig. 3,4 entnehmbar ist. Zweckmäßig ist also bei der Erfindung, daß der Leitapparat ein unbeschaufelter Ringdiffusor mit einem Austrittswinkel zur Laufradachse zwischen etwa 160° und 200°, vorzugsweise 180° ist.The outlet nozzles 8 to 10 ensure in all cases that water jets leave the drive at a flat angle, as can be seen in particular in FIG. 3, 4. It is therefore expedient in the invention that the diffuser is a non-bladed ring diffuser with an exit angle to the impeller axis between approximately 160 ° and 200 °, preferably 180 °.
Durch den von den Leitschaufeln gebildeten Schaufelkranz ist die bekannte Antriebseinrichtung (DE-A-4021340) relativ schwer, was insbesondere bei großem Durchmesser der Antriebseinrichtung, also bei Antriebseinrichtungen hoher Leistung, nachteilig ist. Kennzeichnend ist dabei, daß der Leitapparat mit dem Leitschaufelkranz ausschließlich in radialer Richtung wirkt, wodurch die Schaufelkanäle eine große Länge haben müssen, wodurch die Antriebseinrichtung einen relativ großen Durchmesser hat, was, wie erwähnt, zu einem hohen Gewicht führt und zu Einbauproblemen führen kann, indem von der Antriebseinrichtung Platz beansprucht wird, der als Nutzraum verloren geht.Due to the vane ring formed by the guide vanes, the known drive device (DE-A-4021340) is relatively heavy, which is disadvantageous in particular when the drive device is large in diameter, that is to say in the case of drive devices with high power. It is characteristic here that the guide device with the guide vane ring acts exclusively in the radial direction, as a result of which the vane ducts must have a large length, as a result of which the drive device has a relatively large diameter, which, as mentioned, leads to high weight and can lead to installation problems. in that the drive device takes up space that is lost as usable space.
Bereits durch den Wegfall der Schaufeln gegenüber dem Stand der Technik (DE-A-4021340) mit dem beschaufelten Leitapparat wird der erfindungsgemäße Ringdiffusor erheblich leichter, was besonders bei großen Maschinen wichtig ist. Der erfindungsgemäß schaufellose Ringdiffusor wird so ausgebildet, daß die Wirkrichtung nicht nur radial, sondern auch axial ist. Das bedeutet, daß gegenüber einem Antrieb mit beschaufeltem Leitapparat bei gleicher Schubausbeute das Gehäuse kleiner und leichter wird bzw. ein höherer Schub bei gleichen Außenabmessungen und reduziertem Gewicht erreicht wird. Letztere Version führt durch die dann größeren Strömungsquerschnitte zu einer Senkung der Kavitationsgefahr und der Verschmutzungsneigung.The elimination of the blades compared to the prior art (DE-A-4021340) with the bladed diffuser makes the ring diffuser according to the invention considerably lighter, which is particularly important in large machines. The ringless diffuser according to the invention is designed so that the direction of action is not only radial but also axial. This means that compared to a drive with bladed diffuser with the same thrust yield, the housing becomes smaller and lighter, or a higher thrust is achieved with the same external dimensions and reduced weight. The latter version leads to a reduction in the risk of cavitation and the tendency to contamination due to the then larger flow cross sections.
Dadurch, daß der Ringdiffusor bzw. Leitapparat 5 unmittelbar außen von der Gehäuseaußenwand 12 und innen vom Laufradgehäuse 13 gebildet wird, sind keine gesonderten Bauteile zu ihrer Gestaltung nötig, was ebenfalls einen effizienten Wasserstrahlantrieb geringen Gewichts in kompakter einfacher Bauweise möglich macht. Der erfindungsgemäß ausgebildete Wasserstrahlantrieb gewährleistet eine lange Führung zu den Auslaßdüsen 8,9 und 10. Der Querschnittsverlauf des Leitapparates kann zunehmend sein dergestalt, daß eine Umsetzung von Geschwindigkeitsenergie in Druckenergie erreicht wird (Diffusor). Der Querschnittsverlauf kann jedoch auch gleich bleiben oder sogar abnehmen.The fact that the ring diffuser or diffuser 5 is formed immediately outside of the housing
Im unbeschaufelten Leitapparat bleibt die Drallkomponente, also die in Umfangrichtung weisende Komponente der aus dem Laufrad austretenden Strömung stärker erhalten als es bei einem gemäß dem Stand der Technik beschaufelten Leitapparat möglich ist.The swirl component, that is to say the component pointing in the circumferential direction of the flow emerging from the impeller, is retained to a greater extent in the non-bladed guide apparatus than is possible with a guide apparatus bladed according to the prior art.
Claims (9)
- A water-jet drive for ships, also for use in shallow water, wherein a vaned impeller having a vertical axis of rotation is rotatably disposed in a well-like pressure casing into which the drive for the impeller is inserted from above through a cover plate, the bottom of the casing being closed by a baseplate having at least one water outlet at a small angle and a central water outlet for the axial oncoming flow towards the impeller, wherein a distributor is disposed between the at least one water outlet and the outlet end of the delivery ducts of the impeller,
characterised in that the distributor has a vaneless annular duct between the pressure casing (12) and the impeller casing (13) concentrically with the impeller axis and in which the flow from the semiaxial direction, on leaving the impeller (3), is converted into an outlet flow from the distributor, at an angle between about 160 and 200° to the axial oncoming flow against the impeller. - A water-jet drive according to claim 1, characterised in that the annular duct is a ring diffuser.
- A water-jet drive according to claim 1, characterised in that the cross-section of the annular duct is constant or decreases in the direction of flow.
- A water-jet drive according to claim 1, 2 or 3, characterised in that the outer contour of the annular duct is directly determined by the pump casing (12).
- A water-jet drive according to any of claims 1 to 4, characterised in that the inner contour of the annular duct is directly determined by the impeller casing (13).
- A water-jet drive according to any of claims 1 to 5, characterised in that the annular duct at the downflow end terminates in outlet nozzles (8 - 10) incorporated in a cover plate (6) of the drive casing.
- A water-jet drive according to any of claims 1 to 6, characterised in that the pump inlet (7) is asymmetrical and disposed preferably in the cover plate (7).
- A water-jet drive according to any of claims 1 to 7, characterised in that the entire drive is pivotable around the longitudinal axis or the axis of rotation of the impeller (3).
- A water-jet drive according to any of claims 1 - 8, characterised in that the distributor follows a semiaxially vaned impeller (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4305267A DE4305267A1 (en) | 1993-02-20 | 1993-02-20 | Water jet propulsion |
| DE4305267 | 1993-02-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0612657A1 EP0612657A1 (en) | 1994-08-31 |
| EP0612657B1 true EP0612657B1 (en) | 1997-05-02 |
Family
ID=6480954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94102485A Expired - Lifetime EP0612657B1 (en) | 1993-02-20 | 1994-02-18 | Water jet propulsion |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5520557A (en) |
| EP (1) | EP0612657B1 (en) |
| JP (1) | JP3673289B2 (en) |
| CN (1) | CN1048947C (en) |
| AT (1) | ATE152408T1 (en) |
| DE (2) | DE4305267A1 (en) |
| DK (1) | DK0612657T3 (en) |
| ES (1) | ES2103508T3 (en) |
| FI (1) | FI109013B (en) |
| GR (1) | GR3024084T3 (en) |
| NO (1) | NO306456B1 (en) |
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| DE4428748A1 (en) * | 1993-02-20 | 1996-02-15 | Schottel Werft | Hydro=jet propulsion system for boat |
| CN1098789C (en) * | 1997-01-01 | 2003-01-15 | 江伟业 | Water(air) pressurizing wheel |
| DE19905141B4 (en) * | 1998-02-10 | 2004-08-12 | Kawasaki Jukogyo K.K., Kobe | Vertical water jet propulsion device |
| AUPP804799A0 (en) * | 1999-01-07 | 1999-01-28 | Zwaan, Craig | Jet propulsion pump |
| NL1013192C2 (en) | 1999-10-01 | 2001-04-03 | Holland Roerpropeller B V | Water jet propulsion system. |
| US6561857B1 (en) * | 2001-08-10 | 2003-05-13 | Romer Mass | Hump boat |
| JP5634873B2 (en) * | 2007-12-05 | 2014-12-03 | ショッテル ゲゼルシャフトミットベシュレンクターハフトゥング | Ship propulsion system with pump jet |
| CN101456446B (en) * | 2007-12-11 | 2012-04-11 | 曹玉臣 | Fluid negative pressure potential power machine |
| US20110305586A1 (en) | 2008-12-05 | 2011-12-15 | Schottel Gmbh | Ship propulsion system having a pump jet |
| DE102010048359A1 (en) | 2010-10-13 | 2012-04-19 | Schottel Gmbh | Drive device for a watercraft |
| CN102745319B (en) * | 2012-06-22 | 2015-12-16 | 贾凤斌 | Water bucket type ship propeller |
| CN106516062B (en) * | 2016-12-12 | 2018-08-14 | 陈朋兴 | A kind of marine propulsion |
| 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 |
| CN109263841B (en) * | 2018-10-30 | 2021-05-11 | 中船黄埔文冲船舶有限公司 | Installation method of water jet propulsion device |
| CA3158134A1 (en) * | 2019-10-22 | 2021-04-29 | Paul Lincoln Sinclair | System and method for marine propulsion with low acoustic noise |
| FR3125278A1 (en) | 2021-07-19 | 2023-01-20 | Gfic | Silent vector thruster |
| ES1286659Y (en) * | 2021-10-25 | 2022-05-09 | Sedeno Jordi Monfort | drive device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL16979C (en) * | ||||
| GB140985A (en) * | 1919-11-04 | 1920-04-08 | James Herbert Wainwright Gill | Improvements in or relating to the propulsion and manoeuvring of vessels |
| US4459117A (en) * | 1977-04-25 | 1984-07-10 | Jordan Robert L | Liquid jet propulsion |
| US4672807A (en) * | 1983-08-03 | 1987-06-16 | Innerspace Corporation | Wall thruster and method of operation |
| SU1689214A1 (en) * | 1989-08-10 | 1991-11-07 | Конструкторское Бюро "Винт" | Water-jet propeller |
| DE4021340A1 (en) * | 1990-07-04 | 1992-01-09 | Schottel Werft | WATER JET DRIVE FOR SHIPS INTENDED FOR USE IN SHALLOW WATERS |
| FR2675764B1 (en) * | 1991-04-29 | 1996-08-02 | Alain Cozian | ORIENTAL PROPULSION DEVICE BY WATER JET REACTION. |
-
1993
- 1993-02-20 DE DE4305267A patent/DE4305267A1/en not_active Withdrawn
-
1994
- 1994-02-18 DE DE59402570T patent/DE59402570D1/en not_active Expired - Lifetime
- 1994-02-18 AT AT94102485T patent/ATE152408T1/en not_active IP Right Cessation
- 1994-02-18 FI FI940786A patent/FI109013B/en not_active IP Right Cessation
- 1994-02-18 DK DK94102485.3T patent/DK0612657T3/en active
- 1994-02-18 ES ES94102485T patent/ES2103508T3/en not_active Expired - Lifetime
- 1994-02-18 NO NO940575A patent/NO306456B1/en not_active IP Right Cessation
- 1994-02-18 EP EP94102485A patent/EP0612657B1/en not_active Expired - Lifetime
- 1994-02-19 CN CN94101405.3A patent/CN1048947C/en not_active Expired - Lifetime
- 1994-02-21 JP JP02236894A patent/JP3673289B2/en not_active Expired - Lifetime
- 1994-02-22 US US08/199,063 patent/US5520557A/en not_active Expired - Lifetime
-
1997
- 1997-07-10 GR GR970401734T patent/GR3024084T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO940575D0 (en) | 1994-02-18 |
| DE4305267A1 (en) | 1994-08-25 |
| EP0612657A1 (en) | 1994-08-31 |
| US5520557A (en) | 1996-05-28 |
| NO940575L (en) | 1994-08-22 |
| ATE152408T1 (en) | 1997-05-15 |
| DE59402570D1 (en) | 1997-06-05 |
| FI940786A (en) | 1994-08-21 |
| FI940786A0 (en) | 1994-02-18 |
| ES2103508T3 (en) | 1997-09-16 |
| JP3673289B2 (en) | 2005-07-20 |
| DK0612657T3 (en) | 1997-09-29 |
| NO306456B1 (en) | 1999-11-08 |
| JPH06286693A (en) | 1994-10-11 |
| CN1048947C (en) | 2000-02-02 |
| CN1093666A (en) | 1994-10-19 |
| GR3024084T3 (en) | 1997-10-31 |
| FI109013B (en) | 2002-05-15 |
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