EP1658439A1 - Rotor assembly for a turbomachine - Google Patents

Rotor assembly for a turbomachine

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Publication number
EP1658439A1
EP1658439A1 EP04764145A EP04764145A EP1658439A1 EP 1658439 A1 EP1658439 A1 EP 1658439A1 EP 04764145 A EP04764145 A EP 04764145A EP 04764145 A EP04764145 A EP 04764145A EP 1658439 A1 EP1658439 A1 EP 1658439A1
Authority
EP
European Patent Office
Prior art keywords
impeller
impellers
tube
medium
turbomachine
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.)
Withdrawn
Application number
EP04764145A
Other languages
German (de)
French (fr)
Inventor
Anton Niederbrunner
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1658439A1 publication Critical patent/EP1658439A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • F04D19/026—Multi-stage pumps with a plurality of shafts rotating at different speeds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/04—Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/30—Application in turbines
    • F05B2220/32—Application in turbines in water turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/30—Arrangement of components
    • F05B2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
    • F05B2250/311—Arrangement of components according to the direction of their main axis or their axis of rotation the axes being in line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/30—Arrangement of components
    • F05B2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
    • F05B2250/315—Arrangement of components according to the direction of their main axis or their axis of rotation the main axis being substantially vertical
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Definitions

  • the invention relates to an impeller arrangement of a turbomachine in a tube through which a liquid or gaseous medium, in particular water, flows.
  • a known problem with hydraulically operated machines of all kinds is cavitation, which destroys impellers, at least reduces their service life, can impair the efficiency of the machines and can disrupt the permissible working range.
  • Many constructive measures have been taken and are known from the prior art in order to improve the efficiency of hydraulic machines with directed currents, and in many cases the constructive effort used for this is not in line with the resultant effect.
  • the invention has for its object to provide an impeller assembly which is simple and which leads to an improved mode of operation in turbomachines.
  • the object is achieved by an impeller arrangement in a tube, in which at least a first and a second impeller are arranged one behind the other on at least one shaft and that the medium flowing through the tube in the flow direction sets the impellers in a rotational movement.
  • This impeller arrangement according to the invention has the significant advantage that the medium flowing through an inventive tube with impellers arranged one behind the other, preferably water, but also steam or gas, is not swirled by the first impeller, but rather the first impeller transfers the deflected flow to one the first impeller tuned second impeller that can absorb the flow deflected by the first impeller so that it bears against the blade surfaces of the second impeller.
  • the individual blades of the second impeller are loaded more evenly and the medium flowing through the tube is distributed evenly over the individual blades. Stalls are avoided, optimized work areas can be set and operated permanently.
  • the impeller arrangement is preferably formed from a first, second and a third impeller, which can be arranged on a central shaft or on individual shafts.
  • the effects according to the invention are further enhanced with a third or even fourth impeller, and such a turbomachine can be operated particularly effectively.
  • the individual impellers are each individually connected to a shaft assigned to the respective impeller, the shafts are designed as hollow shafts, each of which can receive one or more shafts from impellers connected in advance. With such an arrangement, the turbomachine according to the invention can be made compact.
  • the first impeller preferably has a smaller flow area than the second impeller and the third impeller has a larger flow area than the second impeller.
  • the individual impellers are connected in a rotationally fixed manner to a shaft, they can permanently transmit torques to the individual shaft which, as required, drive generators which are connected to the shafts of the turbomachine according to the invention.
  • each impeller has a hub, to which blades are fastened, which together with the hub form an impeller.
  • the individual impellers can be connected to this shaft in a rotationally fixed manner at any point on a shaft, and arrangements can be created in which the individual impellers are spaced differently apart from one another.
  • the blades have any geometrical shape, so that they can be easily adapted to specific areas of application.
  • Blades and the flow area of the impellers expand the field of application of the turbomachine according to the invention and the turbomachine according to the invention can be adapted to different conditions, for example water heights, water pressures, water speeds, in the best possible way.
  • guide vanes are provided on the inner surface of the tube and are arranged between the impellers and / or in front of the first impeller.
  • the stationary guide vanes or guide plates can have a wide variety of shapes and they can be arranged on the inner surfaces of the tube at points or in a ring. When viewed in the direction of flow of the medium, the guide vanes preferably have a convex or a concave inflow surface for the flowing medium. With these shapes, a medium flowing through the pipe can be specifically deflected in a large speed and pressure range and matched to the impellers.
  • the shape and the diameter of the individual impellers can change and the arrangement of the individual impellers on one or more shafts can also take place at any distance.
  • the impeller arrangement according to the invention can be used in conjunction with low-pressure turbines or with any propeller turbine.
  • the figure shows at 10 an impeller arrangement which is formed from a tube 11, a first impeller 12, a second impeller 13 and a third impeller 14.
  • the first impeller 12 is fixed in a rotationally fixed manner on a first shaft 15 which is designed as a solid shaft.
  • the second impeller 13 is rotatably connected to a second shaft 16 which receives and / or guides the first shaft 15 as a hollow shaft.
  • the third impeller 14 is rotatably connected to a third shaft 17 in which the shafts 15 and 16 are rotatably arranged.
  • First guide vanes 19, 20 and second are on an inner surface 18
  • the first guide vanes 19, 20 are convex and the second guide vanes 21, 22 also have a convex surface when viewed in the direction of flow of the medium.
  • the inner surface 18 of the tube 11 is fastened or can also be arranged in a ring within the tube 11, depending on the requirements of the turbomachine according to the invention, which are shaped and arranged accordingly.
  • the length of the individual guide blades 19, 20, 21, 22 can be different, so that the medium flowing in the tube 11 is fed as uniformly as possible to the individual blades of the individual impellers.
  • the direction of flow of the medium in the tube 11 is indicated by arrow direction 23. This is preferably water. However, the medium can also be steam or a gas.
  • Individual generators are driven via the impellers 12, 13, 14 connected to the shafts 15, 16, 17.
  • the generators can also be interconnected if necessary, or a single generator is operated with the shafts 15, 16, 17.
  • An impeller arrangement 10 of a fluid-flow machine for liquid or gaseous media is characterized in that a first impeller 12, a second impeller 13 and a third impeller 14 are arranged one behind the other on shafts 15, 16, 17 in a tube 11. With such an arrangement of the impellers 12, 13, 14, cavitation during operation of a turbomachine with directed flows can be avoided and the individual impellers are loaded more uniformly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Hydraulic Turbines (AREA)

Abstract

The invention relates to a rotor assembly (10) for a turbomachine driven by liquid or gaseous agents characterised in that a first running wheel (12), a second running wheel and a third running wheel (14) are serially arranged on the axes (15, 16, 17) in a tube (11). Such arrangement of the running wheels (12, 13, 14) makes it possible to avoid cavitation during the turbomachine operation with directionally controlled flows and uniformly load the running wheels.

Description

Laufradanordnung einer Strömungsmaschine Impeller arrangement of a turbomachine
B e s c h r e i b u n g :Description :
Die Erfindung betrifft eine Laufradanordnung einer Strömungsmaschine in einem Rohr, das von einem flüssigen oder gasförmigen Medium, insbesondere von Wasser, durchströmt wird.The invention relates to an impeller arrangement of a turbomachine in a tube through which a liquid or gaseous medium, in particular water, flows.
Ein bekanntes Problem von hydraulisch betriebenen Maschinen jeglicher Art besteht in der Kavitation, die Laufräder zerstört, zumindest deren Lebensdauer reduzieren, den Wirkungsgrad der Maschinen verschlechtern und den zulässigen Arbeitsbereich stören kann. Viele konstruktive Maßnahmen sind ergriffen worden und aus dem Stand der Technik bekannt, um den Wirkungs- grad von hydraulischen Maschinen mit gelenkten Strömungen zu verbessern und vielfach steht der dafür eingesetzte konstruktive Aufwand nicht im Einklang mit der daraus erzielten Wirkung.A known problem with hydraulically operated machines of all kinds is cavitation, which destroys impellers, at least reduces their service life, can impair the efficiency of the machines and can disrupt the permissible working range. Many constructive measures have been taken and are known from the prior art in order to improve the efficiency of hydraulic machines with directed currents, and in many cases the constructive effort used for this is not in line with the resultant effect.
Der Erfindung liegt die Aufgabe zugrunde, eine Laufradanordnung zu schaffen, die einfach aufgebaut ist und die bei Strömungsmaschinen zu einer verbesserten Betriebsweise führt. Gelöst wird die Aufgabe durch eine Laufradanordnung in einem Rohr, in dem mindestens ein erstes und ein zweites Laufrad hintereinander auf mindestens einer Welle angeordnet sind und dass das durch das Rohr in Strömungsrichtung strömende Medium die Laufräder in eine Drehbewegung versetzt.The invention has for its object to provide an impeller assembly which is simple and which leads to an improved mode of operation in turbomachines. The object is achieved by an impeller arrangement in a tube, in which at least a first and a second impeller are arranged one behind the other on at least one shaft and that the medium flowing through the tube in the flow direction sets the impellers in a rotational movement.
Diese erfindungsgemäße Laufradanordnung hat den wesentlichen Vorteil, dass das durch ein erfindungsgemäß bestücktes Rohr mit hintereinander angeordneten Laufrädern strömende Medium, bevorzugt Wasser, aber auch Dampf oder Gas, nicht durch das erste Laufrad verwirbelt wird, sondern das erste Laufrad übergibt die umgelenkte Strömung an ein auf das erste Laufrad abgestimmtes zweites Laufrad, das die vom ersten Laufrad umgelenkte Strömung so aufnehmen kann, dass sie an den Schaufelflächen des zweiten Laufrades anliegt. Die einzelnen Schaufeln des zweiten Laufrades werden gleichmäßiger belastet und das durch das Rohr strömende Medium verteilt sich gleichmäßig auf die einzelnen Schaufeln. Strömungsabrisse werden vermieden, optimierte Arbeitsbereiche lassen sich einstellen und dauerhaft betreiben.This impeller arrangement according to the invention has the significant advantage that the medium flowing through an inventive tube with impellers arranged one behind the other, preferably water, but also steam or gas, is not swirled by the first impeller, but rather the first impeller transfers the deflected flow to one the first impeller tuned second impeller that can absorb the flow deflected by the first impeller so that it bears against the blade surfaces of the second impeller. The individual blades of the second impeller are loaded more evenly and the medium flowing through the tube is distributed evenly over the individual blades. Stalls are avoided, optimized work areas can be set and operated permanently.
Bevorzugt ist die Laufradanordnung aus einem ersten, zweiten und einem dritten Laufrad gebildet, die auf einer zentralen Welle oder auf jeweils einzelnen Wellen angeordnet sein können. Mit einem dritten oder sogar vierten Laufrad werden die erfindungsgemäßen Effekte noch verstärkt und eine derartige Strömungsmaschine kann besonders effektiv betrieben werden. Sind die einzelnen Laufräder jeweils einzeln mit einer dem jeweiligen Laufrad zugeordneten Welle verbunden, so sind die Wellen als Hohlwellen ausgebildet, die jeweils eine oder mehrere Wellen von voran geschalteten Laufrädern aufnehmen können. Mit einer solchen Anordnung kann die erfindungsgemäße Strömungsmaschine kompakt gebaut werden.The impeller arrangement is preferably formed from a first, second and a third impeller, which can be arranged on a central shaft or on individual shafts. The effects according to the invention are further enhanced with a third or even fourth impeller, and such a turbomachine can be operated particularly effectively. If the individual impellers are each individually connected to a shaft assigned to the respective impeller, the shafts are designed as hollow shafts, each of which can receive one or more shafts from impellers connected in advance. With such an arrangement, the turbomachine according to the invention can be made compact.
Weiterhin weist bevorzugt das erste Laufrad eine kleinere Durchflussfläche als das zweite Laufrad und das dritte Laufrad eine größere Durchflussfläche als das zweite Laufrad auf. Dies hat den Vorteil, dass das durch ein Rohr strömende Medium stetig in axialer Richtung fortschreitend verstärkt umgelenkt wird und Wirbelbildungen in dem strömenden Medium klein gehalten werden können.Furthermore, the first impeller preferably has a smaller flow area than the second impeller and the third impeller has a larger flow area than the second impeller. This has the advantage that the medium flowing through a pipe progressively amplifies in the axial direction is deflected and vortex formation in the flowing medium can be kept small.
Sind die einzelnen Laufräder drehfest mit einer Welle verbunden, so können sie Drehmomente auf die einzelne Welle dauerhaft übertragen, die je nach Bedarf Generatoren antreiben, die mit den Wellen der erfindungsgemäßen Strömungsmaschine verbunden sind.If the individual impellers are connected in a rotationally fixed manner to a shaft, they can permanently transmit torques to the individual shaft which, as required, drive generators which are connected to the shafts of the turbomachine according to the invention.
Weiterhin vorteilhaft ist es, wenn jedes Laufrad eine Nabe aufweist, an der Schaufeln befestigt sind, die gemeinsam mit der Nabe ein Laufrad bilden. Die einzelnen Laufräder können so an beliebigen Stellen einer Welle drehfest mit dieser Welle verbunden werden und es lassen sich Anordnungen schaffen, bei denen die einzelnen Laufräder unterschiedlich weit voneinander beabstandet sind.It is also advantageous if each impeller has a hub, to which blades are fastened, which together with the hub form an impeller. The individual impellers can be connected to this shaft in a rotationally fixed manner at any point on a shaft, and arrangements can be created in which the individual impellers are spaced differently apart from one another.
Die Schaufeln weisen in weiteren Ausführungsformen der Erfindung eine beliebige geometrische Form auf, sodass sie an bestimmte Anwendungsbereiche problemlos angepasst werden können.In further embodiments of the invention, the blades have any geometrical shape, so that they can be easily adapted to specific areas of application.
Durch die Wahl der geometrischen, auch konkav-konvexen Form derBy choosing the geometric, also concave-convex shape of the
Schaufeln und der Durchflussfläche der Laufräder wird der Einsatzbereich der erfindungsgemäßen Strömungsmaschine erweitert und die erfindungsgemäße Strömungsmaschine kann an unterschiedliche Bedingungen, beispielsweise Wasserhöhen, Wasserdrücke, Wassergeschwindigkeiten bestmöglich angepasst werden.Blades and the flow area of the impellers expand the field of application of the turbomachine according to the invention and the turbomachine according to the invention can be adapted to different conditions, for example water heights, water pressures, water speeds, in the best possible way.
In weiterer Ausgestaltung der Erfindung sind auf der Innenoberfläche des Rohres Leitschaufeln (Leitbleche) vorgesehen, die zwischen den Laufrädern und/oder vor dem ersten Laufrad angeordnet sind.In a further embodiment of the invention, guide vanes (guide plates) are provided on the inner surface of the tube and are arranged between the impellers and / or in front of the first impeller.
Dies hat den Vorteil, dass ein durch das Rohr strömendes Medium gezielt auf die Laufräder gelenkt werden kann und vor dem Auftreffen des Mediums auf ein weiteres Laufrad kann das strömende Medium definiert so stark ausgelenkt werden bzw. geführt werden, dass sie sich an die Schaufeloberflächen des Laufrades anlegt, das von dem Medium angeströmt wird. Die ortsfest eingebauten Leitschaufeln bzw. Leitbleche können unterschiedlichste Formen aufweisen und sie können an den Innenoberflächen des Rohres punktuell oder ringförmig angeordnet sein. Bevorzugt weisen die Leitschaufeln in Strömungsrichtung des Mediums gesehen eine konvexe oder eine konkave Anströmfläche für das strömende Medium auf. Mit diesen Formgebungen lässt sich ein durch das Rohr strömendes Medium in einem großen Geschwindig- keits- und Druckbereich gezielt umlenken und auf die Laufräder abstimmen.This has the advantage that a medium flowing through the tube can be directed onto the impellers in a targeted manner and before the medium strikes another impeller, the flowing medium can be deflected or guided so strongly that it adheres to the blade surfaces of the Creates impeller that is flowed from the medium. The stationary guide vanes or guide plates can have a wide variety of shapes and they can be arranged on the inner surfaces of the tube at points or in a ring. When viewed in the direction of flow of the medium, the guide vanes preferably have a convex or a concave inflow surface for the flowing medium. With these shapes, a medium flowing through the pipe can be specifically deflected in a large speed and pressure range and matched to the impellers.
Es versteht sich, dass je nach Anwendung sich die Form und der Durchmesser der einzelnen Laufräder verändern kann und auch die Anordnung der einzelnen Laufräder auf einer oder mehreren Wellen kann in einem beliebigen Abstand erfolgen. Die erfindungsgemäße Laufradanordnung kann in Verbindung mit Niederdruckturbinen oder auch mit jedweden Propellerturbinen eingesetzt werden.It goes without saying that, depending on the application, the shape and the diameter of the individual impellers can change and the arrangement of the individual impellers on one or more shafts can also take place at any distance. The impeller arrangement according to the invention can be used in conjunction with low-pressure turbines or with any propeller turbine.
Die Erfindung wird anhand eines Ausführungsbeispieles näher erläutert. In der Figur ist die erfindungsgemäße Laufradanordnung stark schematisiert dargestellt und die in der Figur gezeigten Darstellungen sind nicht maßstäblich zu verstehen.The invention is explained in more detail using an exemplary embodiment. In the figure, the impeller arrangement according to the invention is shown in a highly schematic manner and the representations shown in the figure are not to be understood to scale.
Die Figur zeigt mit 10 eine Laufradanordnung, die aus einem Rohr 11, einem ersten Laufrad 12, einem zweiten Laufrad 13 und einem dritten Laufrad 14 gebildet ist. Das erste Laufrad 12 ist drehfest auf einer ersten Welle 15 befestigt, die als Vollwelle ausgebildet ist. Das zweite Laufrad 13 ist mit einer zweiten Welle 16 drehfest verbunden, die als Hohlwelle die erste Welle 15 aufnimmt und/oder führt. Das dritte Laufrad 14 ist drehfest mit einer dritten Welle 17 verbunden, in der die Wellen 15 und 16 drehbar angeordnet sind.The figure shows at 10 an impeller arrangement which is formed from a tube 11, a first impeller 12, a second impeller 13 and a third impeller 14. The first impeller 12 is fixed in a rotationally fixed manner on a first shaft 15 which is designed as a solid shaft. The second impeller 13 is rotatably connected to a second shaft 16 which receives and / or guides the first shaft 15 as a hollow shaft. The third impeller 14 is rotatably connected to a third shaft 17 in which the shafts 15 and 16 are rotatably arranged.
Auf einer Innenoberfläche 18 sind erste Leitschaufeln 19, 20 und zweiteFirst guide vanes 19, 20 and second are on an inner surface 18
Leitschaufeln 21, 22 angeordnet. Die ersten Leitschaufeln 19, 20 sind konvex verlaufend ausgebildet und die zweiten Leitschaufeln 21, 22 weisen in Strömungsrichtung des Mediums gesehen ebenfalls eine konvexe Oberfläche auf. Die Krümmung der einzelnen Leitschaufeln, die punktuell an der Innenoberfläche 18 des Rohres 11 befestigt oder aber auch ringförmig innerhalb des Rohres 11 angeordnet sein können, werden je nach Anforderung an die erfindungsgemäße Strömungsmaschine geformt und entsprechend angeordnet. Die Länge der einzelnen Leitschaufeln 19, 20, 21, 22 kann unterschiedlich sein, damit das im Rohr 11 strömende Medium möglichst gleichmäßig den einzelnen Schaufeln der einzelnen Laufräder zugeführt wird. Mit Pfeilrichtung 23 ist die Strömungsrichtung des Mediums im Rohr 11 angegeben. Bevorzugt handelt es sich hierbei um Wasser. Das Medium kann jedoch auch Dampf oder ein Gas sein. Über die Laufräder 12, 13, 14 verbunden mit den Wellen 15, 16, 17 werden einzelne Generatoren angetrieben. Die Generatoren können auch im Bedarfsfall zusammengeschaltet sein oder mit den Wellen 15, 16, 17 wird ein einziger Generator betrieben.Guide vanes 21, 22 arranged. The first guide vanes 19, 20 are convex and the second guide vanes 21, 22 also have a convex surface when viewed in the direction of flow of the medium. The curvature of the individual guide vanes, which are selectively on the The inner surface 18 of the tube 11 is fastened or can also be arranged in a ring within the tube 11, depending on the requirements of the turbomachine according to the invention, which are shaped and arranged accordingly. The length of the individual guide blades 19, 20, 21, 22 can be different, so that the medium flowing in the tube 11 is fed as uniformly as possible to the individual blades of the individual impellers. The direction of flow of the medium in the tube 11 is indicated by arrow direction 23. This is preferably water. However, the medium can also be steam or a gas. Individual generators are driven via the impellers 12, 13, 14 connected to the shafts 15, 16, 17. The generators can also be interconnected if necessary, or a single generator is operated with the shafts 15, 16, 17.
Eine Laufradanordnung 10 einer Strömungsmaschine für flüssige oder gasförmige Medien zeichnet sich dadurch aus, dass in einem Rohr 11 ein erstes Laufrad 12, ein zweites Laufrad 13 und ein drittes Laufrad 14 hintereinander auf Wellen 15, 16, 17 angeordnet sind. Mit einer derartigen Anordnung der Laufräder 12, 13, 14 lassen sich Kavitationen beim Betrieb einer Strömungsmaschine mit gelenkten Strömungen vermeiden und die einzelnen Laufräder werden gleichmäßiger belastet. An impeller arrangement 10 of a fluid-flow machine for liquid or gaseous media is characterized in that a first impeller 12, a second impeller 13 and a third impeller 14 are arranged one behind the other on shafts 15, 16, 17 in a tube 11. With such an arrangement of the impellers 12, 13, 14, cavitation during operation of a turbomachine with directed flows can be avoided and the individual impellers are loaded more uniformly.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Laufradanordnung einer Strömungsmaschine für flüssige oder gasförmige Medien in einem Rohr (11), in dem mindestens ein erstes und ein zweites Laufrad (12, 13) hintereinander auf mindestens einer Welle (15, 16, 17) angeordnet sind und dass das durch das Rohr (11) in Strömungsrichtung (23) strömende Medium die Laufräder (12, 13) in eine Drehbewegung versetzt.1. impeller arrangement of a fluid flow machine for liquid or gaseous media in a tube (11) in which at least a first and a second impeller (12, 13) are arranged one behind the other on at least one shaft (15, 16, 17) and that by the Pipe (11) in the flow direction (23) flowing medium sets the impellers (12, 13) in a rotational movement.
2. Laufradanordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Laufradanordnung (10) aus einem ersten, zweiten und einem dritten Laufrad (12, 13, 14) gebildet ist.2. Impeller arrangement according to claim 1, characterized in that the impeller arrangement (10) is formed from a first, second and a third impeller (12, 13, 14).
3. Laufradanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das erste Laufrad (12) eine kleinere Durchflussfläche als das zweite Laufrad (13) und das dritte Laufrad (14) eine größere Durchflussfläche als das zweite Laufrad (13) aufweist.3. impeller assembly according to claim 1 or 2, characterized in that the first impeller (12) has a smaller flow area than the second impeller (13) and the third impeller (14) has a larger flow area than the second impeller (13).
4. Laufradanordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jedes Laufrad (12, 13, 14) mit einer Welle (15, 16, 17) verbunden ist.4. impeller arrangement according to one of claims 1 to 3, characterized in that each impeller (12, 13, 14) with a shaft (15, 16, 17) is connected.
5. Laufradanordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass jedes Laufrad (12, 13, 14) eine Nabe aufweist, an der Schaufeln befestigt sind, die gemeinsam mit der Nabe ein Laufrad (12, 13, 14) bilden. 5. impeller arrangement according to one of claims 1 to 4, characterized in that each impeller (12, 13, 14) has a hub to which blades are fastened, which together with the hub form an impeller (12, 13, 14).
6. Laufradanordnung nach Anspruch 5, dadurch gekennzeichnet, dass die Schaufeln eine beliebige geometrische Form aufweisen.6. impeller assembly according to claim 5, characterized in that the blades have any geometric shape.
7. Laufradanordnung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass auf der Innenoberfläche (18) des Rohres (11) Leitschaufeln (19, 20, 21, 22) vorgesehen sind, die zwischen den Laufrädern (12, 13, 14) und/oder vor dem ersten Laufrad (12) angeordnet sind.7. impeller arrangement according to one of claims 1 to 6, characterized in that on the inner surface (18) of the tube (11) guide vanes (19, 20, 21, 22) are provided which between the impellers (12, 13, 14) and / or are arranged in front of the first impeller (12).
8. Laufradanordnung nach Anspruch 7, dadurch gekennzeichnet, dass die Leitschaufeln (19, 20, 21, 22) in Strömungsrichtung des Mediums gesehen eine konvexe oder eine konkave Anströmfläche für das Medium aufweisen. 8. impeller arrangement according to claim 7, characterized in that the guide vanes (19, 20, 21, 22) seen in the flow direction of the medium have a convex or a concave inflow surface for the medium.
EP04764145A 2003-08-21 2004-08-16 Rotor assembly for a turbomachine Withdrawn EP1658439A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10338395A DE10338395A1 (en) 2003-08-21 2003-08-21 Impeller assembly of a turbomachine
PCT/EP2004/009153 WO2005021975A1 (en) 2003-08-21 2004-08-16 Rotor assembly for a turbomachine

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EP1658439A1 true EP1658439A1 (en) 2006-05-24

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JP5518276B1 (en) 2013-03-05 2014-06-11 株式会社協和コンサルタンツ Submerged generator
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DE10338395A1 (en) 2005-03-17

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