EP2188532B1 - Pump rotor and pump comprising a pump rotor of said type - Google Patents

Pump rotor and pump comprising a pump rotor of said type Download PDF

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Publication number
EP2188532B1
EP2188532B1 EP08787296A EP08787296A EP2188532B1 EP 2188532 B1 EP2188532 B1 EP 2188532B1 EP 08787296 A EP08787296 A EP 08787296A EP 08787296 A EP08787296 A EP 08787296A EP 2188532 B1 EP2188532 B1 EP 2188532B1
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EP
European Patent Office
Prior art keywords
rotation
pump
hub
accordance
pump rotor
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EP08787296A
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German (de)
French (fr)
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EP2188532A1 (en
Inventor
Carl STÄHLE
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Frideco AG
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Frideco AG
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Priority to EP08787296A priority Critical patent/EP2188532B1/en
Publication of EP2188532A1 publication Critical patent/EP2188532A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/2261Rotors specially for centrifugal pumps with special measures
    • F04D29/2288Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/24Vanes
    • F04D29/242Geometry, shape

Definitions

  • the invention relates to a pump impeller according to the preamble of claim 1.
  • the invention further relates to a pump comprising the pump impeller.
  • the publication CH 662 864 discloses a centrifugal pump with a screw centrifugal open type.
  • This pump impeller or the Zentrifugalradpumpe comprising such a pump impeller has the disadvantages that the specific speed is limited, and that during operation, a pulsation and / or vibration may occur.
  • the publication EP 1 811 184 A1 which is considered to represent the closest prior art, discloses a centrifugal pump having an impeller comprising at least two vanes disposed between two axially spaced apart shields. This centrifugal pump has the disadvantages that it has a poor efficiency, and that can accumulate dirt.
  • Wastewater contains a large number of different types of contaminants such as plastic material, hygiene articles, textiles, etc. Larger problems occur in particular in connection with rags and the like, as they hang on the leading edges of the wings and wrap around the impeller hub. Such incidents lead to increased service intervals, reduced efficiency or even pump failures.
  • Object of the invention is to form a pump impeller or a pump comprising such a pump impeller, which are suitable for the promotion of waste water or other solids contained liquids and are safe and low maintenance operable, and which may have an increased capacity.
  • a pump impeller comprising a first blade, wherein the first blade comprises a first spiral blade part and a subsequent Zentrifugalradschaufelteil, and comprising a hub with a rotation axis, wherein the first Zentrifugalradschaufelteil is firmly connected to the hub, wherein at least one second vane is arranged, which comprises a second fferenradschaufelteil and a subsequent second Zentrifugalradschaufelteil, wherein the first and the second blade each having an outer edge, wherein a connecting means connecting the first and the second blade in the region of the outer edge, and wherein the hub a Forming a frusto-conical or disk-shaped bottom part that extends in the direction of rotation D1 along a partial angle, that the first Zentrifugalradschaufelteil 3b is fixedly connected to the bottom part 3e, and that the second Zentrifugalradschaufelteil 4b so is arranged running with respect to the hub 2, that forms a continuous in the direction of rotation of the bottom part 3
  • the connecting means is designed as an impeller cover, which runs concentrically to the axis of rotation, and which is fixedly connected to the outer edges of the first and second blades.
  • the impeller cover is preferably designed frusto-conical, with a circular, concentric with the axis of rotation extending inlet opening, through which flows the entire liquid to be conveyed to get to the first and second blades.
  • the first and the second Zentrifugalradschaufelteil in the longitudinal direction of the axis of rotation D to the same length.
  • the length is selected such that a small gap results between a pump housing part and the second centrifugal blade part, which considerably improves the efficiency of the pump.
  • the pump impeller according to the invention has the advantage that it has a continuous, running in the direction of rotation gap between the hub and the second blade, because the second blade is not directly connected to the hub.
  • the second blade is fixedly connected to the first blade via the connecting means, and the first blade is connected to the hub.
  • This continuous gap running between the hub and the second blade has the advantage that impurities such as rags can not be deposited or caught anywhere.
  • the passage channel formed within the pump impeller for the fluid to be delivered is preferably designed such that it has no webs, bumps or otherwise formed means to which Impurities such as rags could accumulate or adhere.
  • the inventive pump is thus particularly suitable for the promotion of waste water containing solid impurities, especially textiles, rags, etc.
  • the pump is particularly suitable for pumping municipal wastewater, as well as liquids used in industrial, chemical and municipal applications.
  • a pump comprising the impeller according to the invention with at least two blades also has the advantages that the pump has an increased delivery capacity with the same impeller size or with the same pump size, since the pump can have two or even more blades.
  • the pump can also have a higher efficiency.
  • the pump has a reduced pulsation and a reduced vibration.
  • the impeller according to the invention can also be balanced more easily, can be trimmed easier, and is easier to edit. In addition, the impeller is less susceptible to wear.
  • a pump comprising the impeller according to the invention is thus much more reliable, low-maintenance and cost-effective to operate, in particular when the pump is used to convey effluents or other solids containing liquids.
  • Fig. 1 shows a rotatable about a rotation axis D pump impeller 1 comprising a first blade 3, which is fixedly connected to the hub 2, and comprising a second blade 4, which is connected via connecting means 5 with the first blade 3, so that between the second blade 4 and the hub 2 no direct connection is required, and forms between the second blade 4 and the hub 2 in the direction of rotation D 1 extending gap 6 or 6 opening.
  • gap 6 is herein a Opening, in particular a gap-shaped opening understood.
  • the connecting means 5 is in FIG. 1 indicated only schematically, so that the arrangement of the first and second blade 3.4 is clearly visible.
  • the connecting means 5 is preferably arranged such that it mutually firmly connects the outer edges 3c, 4c of the first and second blades 3.4.
  • the connecting means 5 can be designed in a variety of ways, for example, as shown rod-shaped, part-surface or as in FIG. 5 shown as a whole lid.
  • the first vane 3 comprises a first vane blade part 3a which merges into a first centrifugal vane part 3b.
  • the first Zentrifugalradschaufelteil 3b has a pressure-side blade edge 3d.
  • the first Zentrifugalradschaufelteil 3b is fixedly connected to the hub 2 via a bottom part 3e.
  • the bottom part 3e extends in the direction of rotation D1 along a partial angle.
  • the bottom part 3e could preferably be frusto-conical or disk-shaped along the partial angle.
  • the second Zentrifugalradschaufelteil 4b is arranged so as to extend with respect to the hub 2, that in the running direction of the bottom part 2a between the second Zentrifugalradschaufelteil 4b and the hub 2 a continuous in the direction of rotation D 1 extending gap 6 forms, because the second Zentrifugalradschaufelteil 4b not directly with the Hub 2 is connected.
  • the pump impeller 1 is thus open because of the gap 6 against bottom.
  • the bottom part 3e has a sloping edge 3f.
  • the first Zentrifugalradschaufelteil 3b at the opposite end of the first fferenradschaufelteil 3a an edge 3f.
  • the first blade 3 has an outer edge 3c on its end face.
  • the second blade 4 comprises a second helical blade part 4a which in a second Centrifugal blade part 4b passes.
  • the second Zentrifugalradschaufelteil 4b has a pressure-side blade edge 4d and ends in an edge 4f.
  • the second blade 4 has an outer edge 4c on its front side.
  • the two blades 3, 4 are fixedly connected to one another via a connecting means 5, which is arranged in the region of the outer edges 3c, 4c, but spaced apart so that gaps form, in particular the gap 6 extending in the direction of rotation D1, which has an outlet in FIG Forming direction of the rotation axis D, as well as extending substantially in the direction of rotation of the axis D columns or outlet openings 6a and 6b, which result between the first and second blades 3.4.
  • the impeller 1 has no protruding edges or bumps, to which impurities such as plastic material or textiles such as rags could attach or catch. Such impurities leave the impeller 1 via the gaps 6,6a, 6b.
  • the impeller 1 edges 3f, 4f which also serve to remove possible deposits on the inner walls of the pump housing by scratching or cutting movements. In particular, it can also be used to clean the surface of a pump housing part arranged below the bottom part 3e.
  • the illustrated embodiment shows only two blades 3.4.
  • a pump impeller 1 with a plurality of blades 2 designed in accordance with the second blade 4, which are successively arranged in the direction of rotation D1 and which are all firmly connected to the first blade 3 via the connecting means 5.
  • the pump impeller 1
  • a first blade 3 and a plurality of second blades 4, for example two, three, four, five, six or seven second blades 4 could be arranged one after the other in the direction of rotation D1.
  • the first and second blade 3.4 in an advantageous embodiment in the direction of rotation D 1 extending sub-sections, which extend mutually symmetrical with respect to the axis of rotation D.
  • the first and second fferenradschaufelteil 3a, 4a with respect to the rotation axis D are mutually symmetrical.
  • the pressure-side blade edges 3d, 4d with respect to the rotation axis D mutually symmetrical.
  • FIG. 2 shows that in FIG. 1 pump impeller 1 shown from the direction of view A.
  • the connecting means 5 is shown schematically.
  • the connecting means, 5, as in FIG. 5 represented as a truncated cone-shaped body, with a circular inlet opening 5a, wherein the frusto-conical body, as in FIG. 2 indicated, abutting the outer edges 3c, 4c and is firmly connected thereto.
  • the connecting means can also be designed as a disk in the direction of rotation D radial direction or as a cylindrical tube in the axial direction D.
  • FIG. 3 shows that in FIGS. 1 and 2 illustrated pump impeller 1 from the direction B.
  • FIG. 4 shows a perspective view of the first blade 3, which comprises a first fferenradschaufelteil 3a and a first Zentrifugalradschaufelteil 3b.
  • FIG. 5 shows the first blade 3 in the identical, as in FIG. 4 shown, wherein the frusto-conical connecting part 5 is placed on the first blade 3 and fixedly connected thereto, and wherein the second blade 4 is fixedly connected to the connecting part 5, so that the entire pump impeller 1 is formed.
  • FIG. 6 shows that in FIG. 5 Pump impeller 1 shown from a slightly different perspective view. In particular, it can also be seen how the liquid flowing in via the opening 5a, if appropriate with the impurities carried along, can exit unhindered again either via the gap 6 or the lateral openings 6a, 6b.
  • FIG. 7 shows a longitudinal section through the in the FIGS. 5 and 6
  • the pump impeller 1, which is designed as an impeller cover, is connected in a fluid-tight manner to the first and second blades 3, 4, so that the conveyed fluid enters the pump impeller 1 via the circular opening 5a and leaves it again via the gaps 6, 6a, 6b ,
  • the pump housing 7 has a housing wall designed as a truncated cone 7c.
  • FIG. 8 shows a pump impeller 1 whose first and second Zentrifugalradschaufelteil 3b, 4b in the longitudinal direction of the rotation axis D have different lengths, so that between the housing wall 7c and the second Zentrifugalradschaufelteil 4b, a gap S forms, through which the liquid can flow.
  • This gap S is preferably made as small as possible or narrow in order to keep a backflow of the liquid low.
  • FIG. 9 shows a longitudinal section through a centrifugal pump 7 comprising pump housing parts 7a, 7b, 7c and the in FIG. 7 illustrated pump impeller 1.
  • the pump impeller 1 is connected to a shaft 8.
  • the pump housing could also be designed such that this, in combination with the pump impeller 1 disposed therein, an axial pump is formed by the axial pump instead of the radial outlet has a running in the direction of rotation of the axis D outlet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Rotary Pumps (AREA)

Abstract

The pump rotor (1) comprises a first blade (3), wherein the first blade (3) comprises a first helical-gear blade part (3a) and, adjoining the latter, a first centrifugal-wheel blade part (3b), and said pump rotor (1) comprises a hub (2) with a rotational axis (D), wherein the centrifugal-wheel blade part (3b) is fixedly connected to the hub (2), wherein at least one second blade (4) is provided which comprises a second helical-gear blade part (4a) and, adjoining the latter, a second centrifugal-wheel blade part (4b), wherein the first and the second blades (3,4) have in each case one outer edge (3c,4c), wherein a connecting means (5) connects the first and second blades (3,4) to one another in the region of the outer edge (3c,4c), and wherein the second centrifugal-wheel blade part (4b) is arranged so as to run relative to the hub (2) in such a way that an opening (6) which runs continuously in the rotational direction (D1) is formed between said second centrifugal-wheel blade part (4b) and hub (2), since the second centrifugal-wheel blade part (4b) is not directly connected to the hub (2).

Description

Die Erfindung betrifft ein Pumpenlaufrad gemäss dem Oberbegriff von Anspruch 1. Die Erfindung betrifft weiter eine Pumpe umfassend das Pumpenlaufrad.The invention relates to a pump impeller according to the preamble of claim 1. The invention further relates to a pump comprising the pump impeller.

Stand der TechnikState of the art

Die Druckschrift CH 662 864 offenbart eine Kreiselpumpe mit einem Schraubenzentrifugalrad offener Bauart. Dieses Pumpenlaufrad beziehungsweise die Zentrifugalradpumpe umfassend ein derartiges Pumpenlaufrad weist die Nachteile auf, dass die spezifische Drehzahl beschränkt ist, und dass während dem Betrieb eine Pulsation und/oder Vibration auftreten kann.The publication CH 662 864 discloses a centrifugal pump with a screw centrifugal open type. This pump impeller or the Zentrifugalradpumpe comprising such a pump impeller has the disadvantages that the specific speed is limited, and that during operation, a pulsation and / or vibration may occur.

Die Druckschrift US 6,158,959 offenbart eine Kreiselpumpe mit einem Laufrad umfassend zwei Schaufeln. Dieses Pumpenlaufrad beziehungsweise die Zentrifugalradpumpe umfassend ein derartiges Pumpenlaufrad weist den Nachteil auf, dass dieses zum Verstopfen neigt und daher eine geringe Effizienz aufweist, wenn mit dieser Zentrifugalradpumpe Abwässer gefördert werden.The publication US 6,158,959 discloses a centrifugal pump with an impeller comprising two blades. This pump impeller or the Zentrifugalradpumpe comprising such a pump impeller has the disadvantage that this clogging tends to have a low efficiency when pumped with this Zentrifugalradpumpe wastewater.

Die Druckschrift EP 1 811 184 A1 , die als nächstliegender Stand der Technik angesehen wird, offenbart eine Kreiselpumpe mit einem Laufrad umfassend zumindest zwei Schaufeln, welche zwischen zwei in axialer Richtung voneinander beabstandeten Deckscheiben angeordnet sind. Diese Kreiselpumpe weist die Nachteile auf, dass diese einen schlechten Wirkungsgrad aufweist, und dass sich Verschmutzungen anlagern können.The publication EP 1 811 184 A1 , which is considered to represent the closest prior art, discloses a centrifugal pump having an impeller comprising at least two vanes disposed between two axially spaced apart shields. This centrifugal pump has the disadvantages that it has a poor efficiency, and that can accumulate dirt.

Abwässer enthalten eine grosse Anzahl verschiedener Arten von Verunreinigungen wie Kunststoffmaterial, Hygieneartikel, Textilien usw. Grössere Probleme treten insbesondere in Verbindung mit Lumpen und dergleichen auf, da diese an den Vorderkanten der Flügel hängen bleiben und sich um die Laufradnabe herumwickeln. Derartige Vorfälle führen zu erhöhten Serviceintervallen, verminderter Effizienz oder sogar Pumpenausfällen.Wastewater contains a large number of different types of contaminants such as plastic material, hygiene articles, textiles, etc. Larger problems occur in particular in connection with rags and the like, as they hang on the leading edges of the wings and wrap around the impeller hub. Such incidents lead to increased service intervals, reduced efficiency or even pump failures.

Darstellung der ErfindungPresentation of the invention

Aufgabe der Erfindung ist es ein Pumpenlaufrad beziehungsweise eine Pumpe umfassend ein derartiges Pumpenlaufrad zu bilden, welche zur Förderung von Abwässern oder andere Feststoffe enthaltene Flüssigkeiten geeignet sind sowie sicher und wartungsarm betreibbar sind, und welche eine erhöhte Förderleistung aufweisen können.Object of the invention is to form a pump impeller or a pump comprising such a pump impeller, which are suitable for the promotion of waste water or other solids contained liquids and are safe and low maintenance operable, and which may have an increased capacity.

Diese Aufgabe wird gelöst mit einem Pumpenlaufrad aufweisend die Merkmale von Anspruch 1. Die Unteransprüche 2 bis 11 betreffen weitere, vorteilhaft ausgestaltete Pumpenlaufräder. Die Aufgabe wird weiter gelöst mit einer Pumpe, insbesondere einer Zentrifugalradpumpe oder einer Axialpumpe, aufweisend das erfindungsgemässe Pumpenlaufrad.This object is achieved with a pump impeller comprising the features of claim 1. The dependent claims 2 to 11 relate to further, advantageously designed pump impellers. The task becomes further solved with a pump, in particular a Zentrifugalradpumpe or an axial pump, comprising the inventive pump impeller.

Die Aufgabe wird insbesondere gelöst mit einem Pumpenlaufrad umfassend eine erste Schaufel, wobei die erste Schaufel ein erstes Schraubenradschaufelteil und ein daran anschliessendes erstes Zentrifugalradschaufelteil umfasst, sowie umfassend eine Nabe mit einer Drehachse, wobei das erste Zentrifugalradschaufelteil fest mit der Nabe verbunden ist, wobei zumindest eine zweite Schaufel angeordnet ist, welches ein zweites Schraubenradschaufelteil und ein daran anschliessendes zweites Zentrifugalradschaufelteil umfasst, wobei die erste und die zweite Schaufel je eine Aussenkante aufweisen, wobei ein Verbindungsmittel die erste und die zweite Schaufel im Bereich der Aussenkante miteinander verbindet, und wobei die Nabe ein kegelstumpfförmiges oder scheibenförmiges Bodenteil ausbildet, das sich in Drehrichtung D1 entlang eines Teilwinkels erstreckt, dass das erste Zentrifugalradschaufelteil 3b fest mit dem Bodenteil 3e verbunden ist, und dass das zweite Zentrifugalradschaufelteil 4b derart bezüglich der Nabe 2 verlaufend angeordnet ist, dass sich in Verlaufsrichtung des Bodenteils 3e zwischen dem zweiten Zentrifugalradschaufelteil 4b und der Nabe 2 ein durchgehender in Drehrichtung verlaufender Spalt ausbildet, weil das zweite Zentrifugalradschaufelteil nicht direkt mit der Nabe verbunden ist. Das erfindungsgemässe Pumpenlaufrad ist somit gegen unten offen, und weist dort den in Drehrichtung verlaufenden Spalt auf. Dank diesem Spalt wird die darunter liegende Fläche auf Grund der Rotation des Pumpenlaufrades ständig gereinigt. Daher verhindert dieser Spalt auch Ablagerungen.The object is achieved in particular with a pump impeller comprising a first blade, wherein the first blade comprises a first spiral blade part and a subsequent Zentrifugalradschaufelteil, and comprising a hub with a rotation axis, wherein the first Zentrifugalradschaufelteil is firmly connected to the hub, wherein at least one second vane is arranged, which comprises a second Schraubenradschaufelteil and a subsequent second Zentrifugalradschaufelteil, wherein the first and the second blade each having an outer edge, wherein a connecting means connecting the first and the second blade in the region of the outer edge, and wherein the hub a Forming a frusto-conical or disk-shaped bottom part that extends in the direction of rotation D1 along a partial angle, that the first Zentrifugalradschaufelteil 3b is fixedly connected to the bottom part 3e, and that the second Zentrifugalradschaufelteil 4b so is arranged running with respect to the hub 2, that forms a continuous in the direction of rotation of the bottom part 3e between the second Zentrifugalradschaufelteil 4b and the hub 2, a gap extending in the direction of rotation, because the second Zentrifugalradschaufelteil is not directly connected to the hub. The pump impeller according to the invention is thus open towards the bottom, where it has the gap running in the direction of rotation. Thanks to this gap, the underlying surface is constantly cleaned due to the rotation of the pump impeller. Therefore, this gap also prevents deposits.

In einer besonders vorteilhaften Ausgestaltung ist das Verbindungsmittel als ein Laufraddeckel ausgestaltet, welcher konzentrisch zur Drehachse verläuft, und welcher fest mit den Aussenkanten der ersten und zweiten Schaufel verbunden ist. Der Laufraddeckel ist vorzugsweise kegelstumpfförmig ausgestaltet, mit einer kreisförmigen, konzentrisch zur Drehachse verlaufenden Eintrittsöffnung, durch welche die gesamte zu fördernde Flüssigkeit einströmt, um zur ersten und zweiten Schaufel zu gelangen.In a particularly advantageous embodiment, the connecting means is designed as an impeller cover, which runs concentrically to the axis of rotation, and which is fixedly connected to the outer edges of the first and second blades. The impeller cover is preferably designed frusto-conical, with a circular, concentric with the axis of rotation extending inlet opening, through which flows the entire liquid to be conveyed to get to the first and second blades.

In einer besonders vorteilhaften Ausgestaltung weist das erste und das zweite Zentrifugalradschaufelteil in Längsrichtung der Drehachse D dieselbe Länge auf. In einer besonders vorteilhaften Ausgestaltung ist die Länge derart gewählt, dass sich zwischen einem Pumpengehäuseteil und dem zweiten Zentrifugalradschaufelteil ein geringer Spalt ergibt, was den Wirkungsgrad der Pumpe erheblich verbessert.In a particularly advantageous embodiment, the first and the second Zentrifugalradschaufelteil in the longitudinal direction of the axis of rotation D to the same length. In a particularly advantageous embodiment, the length is selected such that a small gap results between a pump housing part and the second centrifugal blade part, which considerably improves the efficiency of the pump.

Das erfindungsgemässe Pumpenlaufrad weist den Vorteil auf, dass dieses zwischen der Nabe und der zweiten Schaufel einen durchgehenden, in Drehrichtung verlaufenden Spalt aufweist, weil die zweite Schaufel nicht direkt mit der Nabe verbunden ist. Die zweite Schaufel ist über das Verbindungsmittel fest mit der ersten Schaufel verbunden, und die erste Schaufel ist mit der Nabe verbunden. Dieser durchgehende zwischen der Nabe und der zweiten Schaufel verlaufende Spalt weist den Vorteil auf, dass sich Verunreinigungen wie beispielsweise Lumpen nicht irgendwo anlagern oder verfangen können. Der innerhalb des Pumpenlaufrades ausgebildete Durchtrittskanal für das zu fördernde Fluid ist vorzugsweise derart ausgestaltet, dass dieser keine Stege, Höcker oder sonst wie gebildete Mittel aufweist, an welchen sich Verunreinigungen wie Lumpen ansammelt oder anhaften könnten. Die erfindungsgemässe Pumpe ist somit insbesondere auch zur Förderung von Abwässern geeignet, die feste Verunreinigungen, insbesondere auch Textilien, Lumpen usw. enthalten. Die Pumpe ist insbesondere zur Förderung von Siedlungsabwässern, sowie in industriellen, chemischen und kommunalen Anwendungen anfallende Flüssigkeiten geeignet.The pump impeller according to the invention has the advantage that it has a continuous, running in the direction of rotation gap between the hub and the second blade, because the second blade is not directly connected to the hub. The second blade is fixedly connected to the first blade via the connecting means, and the first blade is connected to the hub. This continuous gap running between the hub and the second blade has the advantage that impurities such as rags can not be deposited or caught anywhere. The passage channel formed within the pump impeller for the fluid to be delivered is preferably designed such that it has no webs, bumps or otherwise formed means to which Impurities such as rags could accumulate or adhere. The inventive pump is thus particularly suitable for the promotion of waste water containing solid impurities, especially textiles, rags, etc. The pump is particularly suitable for pumping municipal wastewater, as well as liquids used in industrial, chemical and municipal applications.

Eine Pumpe umfassend das erfindungsgemässe Pumpenrad mit zumindest zwei Schaufeln weist zudem die Vorteile auf, dass die Pumpe eine erhöhte Förderleistung bei gleicher Pumpenradgrösse beziehungsweise bei gleicher Pumpengrösse aufweist, da die Pumpe zwei oder noch mehr Schaufeln aufweisen kann. Die Pumpe kann zudem einen höheren Wirkungsgrad aufweisen. Zudem weist die Pumpe eine verringerte Pulsation sowie eine verringerte Vibration auf. Das erfindungsgemässe Pumpenrad kann zudem einfacher ausgewuchtet werden, kann einfacher getrimmt werden, und ist einfacher zu bearbeiten. Zudem ist das Pumpenrad weniger verschleissanfällig.A pump comprising the impeller according to the invention with at least two blades also has the advantages that the pump has an increased delivery capacity with the same impeller size or with the same pump size, since the pump can have two or even more blades. The pump can also have a higher efficiency. In addition, the pump has a reduced pulsation and a reduced vibration. The impeller according to the invention can also be balanced more easily, can be trimmed easier, and is easier to edit. In addition, the impeller is less susceptible to wear.

Eine Pumpe umfassend das erfindungsgemässe Pumpenrad ist somit wesentlich zuverlässiger, wartungsarmer und kostengünstiger zu betreiben, insbesondere wenn die Pumpe zur Förderung von Abwässern oder andere Feststoffe enthaltende Flüssigkeiten verwendet wird.A pump comprising the impeller according to the invention is thus much more reliable, low-maintenance and cost-effective to operate, in particular when the pump is used to convey effluents or other solids containing liquids.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die zur Erläuterung der Ausführungsbeispiele verwendeten Zeichnungen zeigen:

Fig. 1
eine perspektivische Ansicht eines Ausführungsbeispieles eines Pumpenlaufrades mit nur symbolisch dargestellten Verbindungsmitteln;
Fig. 2
eine Seitenansicht des in Figur 1 dargestellten Pumpenlaufrades aus seitlicher Blickrichtung A;
Fig. 3
eine Untenansicht des in Figur 1 und 2 dargestellten Pumpenlaufrades aus der Blickrichtung B;
Fig. 4
eine perspektivische Ansicht der ersten Schaufel;
Fig. 5
eine perspektivische Ansicht eines Pumpenlaufrades mit Laufraddeckel;
Fig. 6
das in Figur 5 dargestellte Pumpenlaufrad aus leicht unterschiedlicher perspektivischer Ansicht;
Fig. 7
ein Längsschnitt durch das in Figur 5 und 6 dargestellte Pumpenlaufrad;
Fig. 8
ein Längsschnitt durch ein weiteres Pumpenlaufrad;
Fig. 9
ein Längsschnitt durch eine Zentrifugalradpumpe.
The drawings used to explain the embodiments show:
Fig. 1
a perspective view of an embodiment of a pump impeller with only symbolically illustrated connecting means;
Fig. 2
a side view of the in FIG. 1 illustrated pump impeller from the lateral direction of view A;
Fig. 3
a bottom view of the in FIGS. 1 and 2 Pump impeller shown from the direction B;
Fig. 4
a perspective view of the first blade;
Fig. 5
a perspective view of a pump impeller with impeller cover;
Fig. 6
this in FIG. 5 illustrated impeller from slightly different perspective view;
Fig. 7
a longitudinal section through the in FIGS. 5 and 6 illustrated impeller;
Fig. 8
a longitudinal section through another pump impeller;
Fig. 9
a longitudinal section through a Zentrifugalradpumpe.

Grundsätzlich sind in den Zeichnungen gleiche Teile mit gleichen Bezugszeichen versehen.Basically, the same parts are given the same reference numerals in the drawings.

Wege zur Ausführung der ErfindungWays to carry out the invention

Fig. 1 zeigt ein um eine Drehachse D drehbares Pumpenlaufrad 1 umfassend eine erste Schaufel 3, welche fest mit der Nabe 2 verbunden ist, sowie umfassend eine zweite Schaufel 4, welche über Verbindungsmittel 5 mit der ersten Schaufel 3 verbunden ist, sodass zwischen der zweiten Schaufel 4 und der Nabe 2 keine direkte Verbindung erforderlich ist, und sich zwischen der zweiten Schaufel 4 und der Nabe 2 ein in Drehrichtung D 1 verlaufender Spalt 6 beziehungsweise Öffnung 6 ausbildet. Unter Spalt 6 wird hierin eine Öffnung, insbesondere eine spaltförmige Öffnung verstanden. Das Verbindungsmittel 5 ist in Figur 1 nur schematisch angedeutet, damit die Anordnung der ersten und zweiten Schaufel 3,4 klar ersichtlich ist. Das Verbindungsmittel 5 ist vorzugsweise derart angeordnet, dass dieses die Aussenkanten 3c, 4c der ersten und zweiten Schaufel 3,4 gegenseitig fest verbindet. Das Verbindungsmittel 5 kann in einer Vielzahl von Möglichkeiten ausgestaltet sein, zum Beispiel wie dargestellt stabförmig , teilflächig oder wie in Figur 5 dargestellt, als ganzer Deckel. Die erste Schaufel 3 umfasst ein erstes Schraubenradschaufelteil 3a welches in ein erstes Zentrifugalradschaufelteil 3b übergeht. Das erste Zentrifugalradschaufelteil 3b weist eine druckseitige Schaufelflanke 3d auf. Das erste Zentrifugalradschaufelteil 3b ist über ein Bodenteil 3e fest mit der Nabe 2 verbunden. Das Bodenteil 3e erstreckt sich in Drehrichtung D1 entlang eines Teilwinkels. Das Bodenteil 3e könnte entlang des Teilwinkels vorzugsweise kegelstumpfförmig oder scheibenförmig ausgestaltet sein. Das zweite Zentrifugalradschaufelteil 4b ist derart bezüglich der Nabe 2 verlaufend angeordnet ist, dass sich in Verlaufsrichtung des Bodenteils 2a zwischen dem zweiten Zentrifugalradschaufelteil 4b und der Nabe 2 ein durchgehender in Drehrichtung D 1 verlaufender Spalt 6 ausbildet, weil das zweite Zentrifugalradschaufelteil 4b nicht direkt mit der Nabe 2 verbunden ist. Das Pumpenlaufrad 1 ist somit wegen des Spaltes 6 gegen unten offen. Das Bodenteil 3e weist eine schräg verlaufende Kante 3f auf. Zudem weist das erste Zentrifugalradschaufelteil 3b an dem dem ersten Schraubenradschaufelteil 3a gegenüberliegenden Ende eine Kante 3f auf. Die erste Schaufel 3 weist an deren Stirnseite eine Aussenkante 3c auf. Die zweite Schaufel 4 umfasst ein zweites Schraubenradschaufelteil 4a welches in ein zweites Zentrifugalradschaufelteil 4b übergeht. Das zweite Zentrifugalradschaufelteil 4b weist eine druckseitige Schaufelflanke 4d auf und endet in einer Kante 4f. Die zweite Schaufel 4 weist an deren Stirnseite eine Aussenkante 4c auf. Die beiden Schaufeln 3,4 sind über ein Verbindungsmittel 5, welches im Bereich der Aussenkanten 3c,4c angeordnet ist, fest miteinander verbunden, jedoch gegenseitig beabstandet angeordnet, sodass sich Spalten ausbilden, insbesondere der in Drehrichtung D1 verlaufende Spalt 6, welcher einen Auslass in Verlaufsrichtung der Drehachse D ausbildet, als auch die im wesentlichen in Verlaufsrichtung der Drehachse D verlaufenden Spalten beziehungsweise Austrittsöffnungen 6a und 6b, welche sich zwischen der ersten und zweiten Schaufel 3,4 ergeben. Das Pumpenlaufrad 1 weist keine vorstehenden Kanten oder Höcker auf, an welchen sich Verunreinigungen wie Kunststoffmaterial oder Textilien wie Lumpen anlagern oder verfangen könnten. Derartige Verunreinigungen verlassen das Pumpenlaufrad 1 über die Spalten 6,6a,6b. In einer vorteilhaften Ausgestaltung weist das Pumpenlaufrad 1 Kanten 3f,4f auf, welche auch dazu dienen mögliche Anlagerungen an den Innenwänden des Pumpengehäuses durch Kratz- oder Schneidbewegungen zu entfernen. Insbesondere kann damit auch die unterhalb des Bodenteils 3e angeordnete Fläche eines Pumpengehäuseteils gereinigt werden. Das dargestellte Ausführungsbeispiel zeigt nur zwei Schaufeln 3,4. Es ist jedoch auch möglich ein Pumpenlaufrad 1 zu bilden mit einer Mehrzahl von entsprechend der zweiten Schaufel 4 ausgebildeten Schaufeln, welche in Drehrichtung D1 nacheinander folgend angeordnet sind, und welche über das Verbindungsmittel 5 alle mit der ersten Schaufel 3 fest verbunden sind. Das Pumpenlaufrad 1 könnte somit beispielsweise eine erste Schaufel 3 und eine Mehrzahl von zweiten Schaufeln 4, beispielsweise zwei, drei, vier, fünf, sechs oder sieben zweite Schaufeln 4 aufweisen, welche in Drehrichtung D1 nacheinander folgend angeordnet sind. Fig. 1 shows a rotatable about a rotation axis D pump impeller 1 comprising a first blade 3, which is fixedly connected to the hub 2, and comprising a second blade 4, which is connected via connecting means 5 with the first blade 3, so that between the second blade 4 and the hub 2 no direct connection is required, and forms between the second blade 4 and the hub 2 in the direction of rotation D 1 extending gap 6 or 6 opening. Under gap 6 is herein a Opening, in particular a gap-shaped opening understood. The connecting means 5 is in FIG. 1 indicated only schematically, so that the arrangement of the first and second blade 3.4 is clearly visible. The connecting means 5 is preferably arranged such that it mutually firmly connects the outer edges 3c, 4c of the first and second blades 3.4. The connecting means 5 can be designed in a variety of ways, for example, as shown rod-shaped, part-surface or as in FIG. 5 shown as a whole lid. The first vane 3 comprises a first vane blade part 3a which merges into a first centrifugal vane part 3b. The first Zentrifugalradschaufelteil 3b has a pressure-side blade edge 3d. The first Zentrifugalradschaufelteil 3b is fixedly connected to the hub 2 via a bottom part 3e. The bottom part 3e extends in the direction of rotation D1 along a partial angle. The bottom part 3e could preferably be frusto-conical or disk-shaped along the partial angle. The second Zentrifugalradschaufelteil 4b is arranged so as to extend with respect to the hub 2, that in the running direction of the bottom part 2a between the second Zentrifugalradschaufelteil 4b and the hub 2 a continuous in the direction of rotation D 1 extending gap 6 forms, because the second Zentrifugalradschaufelteil 4b not directly with the Hub 2 is connected. The pump impeller 1 is thus open because of the gap 6 against bottom. The bottom part 3e has a sloping edge 3f. In addition, the first Zentrifugalradschaufelteil 3b at the opposite end of the first Schraubenradschaufelteil 3a an edge 3f. The first blade 3 has an outer edge 3c on its end face. The second blade 4 comprises a second helical blade part 4a which in a second Centrifugal blade part 4b passes. The second Zentrifugalradschaufelteil 4b has a pressure-side blade edge 4d and ends in an edge 4f. The second blade 4 has an outer edge 4c on its front side. The two blades 3, 4 are fixedly connected to one another via a connecting means 5, which is arranged in the region of the outer edges 3c, 4c, but spaced apart so that gaps form, in particular the gap 6 extending in the direction of rotation D1, which has an outlet in FIG Forming direction of the rotation axis D, as well as extending substantially in the direction of rotation of the axis D columns or outlet openings 6a and 6b, which result between the first and second blades 3.4. The impeller 1 has no protruding edges or bumps, to which impurities such as plastic material or textiles such as rags could attach or catch. Such impurities leave the impeller 1 via the gaps 6,6a, 6b. In an advantageous embodiment, the impeller 1 edges 3f, 4f, which also serve to remove possible deposits on the inner walls of the pump housing by scratching or cutting movements. In particular, it can also be used to clean the surface of a pump housing part arranged below the bottom part 3e. The illustrated embodiment shows only two blades 3.4. However, it is also possible to form a pump impeller 1 with a plurality of blades 2 designed in accordance with the second blade 4, which are successively arranged in the direction of rotation D1 and which are all firmly connected to the first blade 3 via the connecting means 5. The pump impeller 1 Thus, for example, a first blade 3 and a plurality of second blades 4, for example two, three, four, five, six or seven second blades 4 could be arranged one after the other in the direction of rotation D1.

Wie in Figur 1 dargestellt weist die erste und zweite Schaufel 3,4 in einer vorteilhaften Ausgestaltung in Drehrichtung D 1 verlaufende Teilabschnitte aufweist, welche bezüglich der Drehachse D gegenseitig symmetrisch verlaufen. In Figur 1 verlaufen das erste und zweite Schraubenradschaufelteil 3a,4a bezüglich der Drehachse D gegenseitig symmetrisch. Zudem verlaufen in Figur 1 die druckseitigen Schaufelflanken 3d,4d bezüglich der Drehachse D gegenseitig symmetrisch.As in FIG. 1 illustrated, the first and second blade 3.4 in an advantageous embodiment in the direction of rotation D 1 extending sub-sections, which extend mutually symmetrical with respect to the axis of rotation D. In FIG. 1 the first and second Schraubenradschaufelteil 3a, 4a with respect to the rotation axis D are mutually symmetrical. In addition, run in FIG. 1 the pressure-side blade edges 3d, 4d with respect to the rotation axis D mutually symmetrical.

Figur 2 zeigt das in Figur 1 dargestellte Pumpenlaufrad 1 aus Blickrichtung A. Das Verbindungsmittel 5 ist schematisch dargestellt. In einer bevorzugten Ausführungsform ist das Verbindungsmittel, 5, wie in Figur 5 dargestellt, als kegelstumpfförmiger Körper ausgestaltet, mit einer kreisrunden Eintrittsöffnung 5a, wobei der kegelstumpfförmige Körper, wie in Figur 2 angedeutet, an den Aussenkanten 3c,4c anliegt und mit diesen fest verbunden ist. Das Verbindungsmittel kann auch als Scheibe in zur Drehachse D radialer Richtung oder als zylindrisches Rohr in axialer Richtung D ausgeführt werden. FIG. 2 shows that in FIG. 1 pump impeller 1 shown from the direction of view A. The connecting means 5 is shown schematically. In a preferred embodiment, the connecting means, 5, as in FIG. 5 represented as a truncated cone-shaped body, with a circular inlet opening 5a, wherein the frusto-conical body, as in FIG. 2 indicated, abutting the outer edges 3c, 4c and is firmly connected thereto. The connecting means can also be designed as a disk in the direction of rotation D radial direction or as a cylindrical tube in the axial direction D.

Figur 3 zeigt das in Figur 1 und 2 dargestellte Pumpenlaufrad 1 aus Blickrichtung B. FIG. 3 shows that in FIGS. 1 and 2 illustrated pump impeller 1 from the direction B.

Figur 4 zeigt eine perspektivische Ansicht der ersten Schaufel 3, welche ein erstes Schraubenradschaufelteil 3a und ein erstes Zentrifugalradschaufelteil 3b umfasst. FIG. 4 shows a perspective view of the first blade 3, which comprises a first Schraubenradschaufelteil 3a and a first Zentrifugalradschaufelteil 3b.

Figur 5 zeigt die erste Schaufel 3 in der identischen, wie in Figur 4 dargestellten Lage, wobei das kegelstumpfförmige Verbindungsteil 5 auf die erste Schaufel 3 aufgesetzt und mit dieser fest verbunden ist, und wobei die zweite Schaufel 4 fest mit dem Verbindungsteil 5 verbunden ist, sodass das ganze Pumpenlaufrad 1 ausgebildet ist. FIG. 5 shows the first blade 3 in the identical, as in FIG. 4 shown, wherein the frusto-conical connecting part 5 is placed on the first blade 3 and fixedly connected thereto, and wherein the second blade 4 is fixedly connected to the connecting part 5, so that the entire pump impeller 1 is formed.

Figur 6 zeigt das in Figur 5 dargestellte Pumpenlaufrad 1 aus einer leicht unterschiedlichen perspektivischen Ansicht. Insbesondere ist auch erkennbar, wie die über die Öffnung 5a einströmende Flüssigkeit, gegebenenfalls mit den mittransportierten Verunreinigungen, ungehindert wieder entweder über den Spalt 6, oder die seitlichen Öffnungen 6a, 6b austreten kann. FIG. 6 shows that in FIG. 5 Pump impeller 1 shown from a slightly different perspective view. In particular, it can also be seen how the liquid flowing in via the opening 5a, if appropriate with the impurities carried along, can exit unhindered again either via the gap 6 or the lateral openings 6a, 6b.

Figur 7 zeigt einen Längsschnitt durch das in den Figuren 5 und 6 dargestellte Pumpenlaufrad 1. Das als Laufraddeckel ausgestaltete Verbindungsmittel 5 ist fluiddicht mit der ersten und zweiten Schaufel 3,4 verbunden, sodass das geförderte Fluid über die kreisförmige Öffnung 5a in das Pumpenlaufrad 1 eintritt, und dieses über die Spalten 6, 6a, 6b wieder verlässt. In einer vorteilhaften Ausgestaltung weist das Pumpengehäuse 7 eine als Kegelstumpf ausgebildete Gehäusewand 7c auf. In Figur 7 weist das erste und zweite Zentrifugalradschaufelteil 3b,4b in Längsrichtung der Drehachse D etwa dieselbe Länge auf, sodass sich zwischen der Gehäusewand 7c und dem zweiten Zentrifugalradschaufelteil 4b nur ein äusserst geringer Spalt ausbildet, sodass durch diesen Spalt nur eine geringe Fluidmenge austritt. Diese Ausgestaltung weist den Vorteil auf, dass das Pumpenlaufrad 1 einen hohen Wirkungsgrad aufweist. Die Hauptmenge des geförderten Fluides wird daher durch die Spalten 6a und 6b austreten. Sollte sich an der Gehäusewand 7c eine Verunreinigung anlagern, so würde dies vorzugsweise durch die Kante 3f des Bodenteils 3e, welche sich entlang der Gehäusewand 7c bewegt, entfernt werden. Somit werden Schmutzanlagerungen verhindert beziehungsweise sicher entfernt, was einen zuverlässigen Betrieb des Pumpenlaufrades gewährleistet. FIG. 7 shows a longitudinal section through the in the FIGS. 5 and 6 The pump impeller 1, which is designed as an impeller cover, is connected in a fluid-tight manner to the first and second blades 3, 4, so that the conveyed fluid enters the pump impeller 1 via the circular opening 5a and leaves it again via the gaps 6, 6a, 6b , In an advantageous embodiment, the pump housing 7 has a housing wall designed as a truncated cone 7c. In FIG. 7 the first and second Zentrifugalradschaufelteil 3b, 4b in the longitudinal direction of the axis of rotation D about the same length, so that only a very small gap between the housing wall 7c and the second Zentrifugalradschaufelteil 4b forms, so that only a small amount of fluid exits through this gap. This embodiment has the Advantageous that the pump impeller 1 has a high efficiency. The bulk of the pumped fluid will therefore exit through columns 6a and 6b. Should an impurity build up on the housing wall 7c, this would preferably be removed by the edge 3f of the bottom part 3e, which moves along the housing wall 7c. Thus, dirt deposits are prevented or safely removed, which ensures reliable operation of the pump impeller.

Figur 8 zeigt ein Pumpenlaufrad 1 deren erstes und zweites Zentrifugalradschaufelteil 3b,4b in Längsrichtung der Drehachse D unterschiedliche Längen aufweisen, sodass sich zwischen der Gehäusewand 7c und dem zweiten Zentrifugalradschaufelteil 4b ein Spalt S ausbildet, durch welchen die Flüssigkeit strömen kann. Dieser Spalt S wird vorzugsweise möglichst klein beziehungsweise schmal ausgestaltet, um ein Rückströmen der Flüssigkeit gering zu halten. FIG. 8 shows a pump impeller 1 whose first and second Zentrifugalradschaufelteil 3b, 4b in the longitudinal direction of the rotation axis D have different lengths, so that between the housing wall 7c and the second Zentrifugalradschaufelteil 4b, a gap S forms, through which the liquid can flow. This gap S is preferably made as small as possible or narrow in order to keep a backflow of the liquid low.

Figur 9 zeigt einen Längsschnitt durch eine Kreiselpumpe 7 umfassend Pumpengehäuseteile 7a,7b,7c sowie das in Figur 7 dargestellte Pumpenlaufrad 1. Das Pumpen laufrad 1 ist mit einer Welle 8 verbunden. Das Pumpengehäuse könnte auch derart ausgestaltet sein, dass dieses, in Kombination mit dem darin angeordneten Pumpenlaufrad 1, eine Axialpumpe ausbildet, indem die Axialpumpe an stelle des radialen Auslasses einen in Verlaufsrichtung der Drehachse D verlaufenden Auslass aufweist. FIG. 9 shows a longitudinal section through a centrifugal pump 7 comprising pump housing parts 7a, 7b, 7c and the in FIG. 7 illustrated pump impeller 1. The pump impeller 1 is connected to a shaft 8. The pump housing could also be designed such that this, in combination with the pump impeller 1 disposed therein, an axial pump is formed by the axial pump instead of the radial outlet has a running in the direction of rotation of the axis D outlet.

Claims (12)

  1. A pump rotor (1) including a first vane (3), wherein the first vane (3) includes a first helical wheel vane part (3a) and a first centrifugal wheel vane part (3b) adjoining it, and including a hub (2) having an axis of rotation (D), wherein the centrifugal wheel vane part (3b) is fixedly connected to the hub (2), and wherein at least one second vane (4) is provided which includes a second helical wheel vane part (4a) and a second centrifugal vane part (4b) adjoining it, and wherein the first and the second vanes (3, 4) each have an outer edge (3c, 4c), and wherein a connection means (5) connects the first and the second vanes (3, 4) to one another in the region of the outer edge (3c, 4c), characterized in that the hub (2) forms a frustoconical or disk-shaped base part (3e) which extends along a pitch angle in the direction of rotation (D1); in that the first centrifugal wheel vane part (3b) is fixedly connected to the base part (3e); and in that the second centrifugal wheel vane part (4b) is arranged extending with respect to the hub (2) such that in the direction of extent of the base part (3e) a throughgoing gap (6) extending in the direction of rotation (D1) is formed between the second centrifugal wheel vane part (4b) and the hub (2) because the second centrifugal wheel vane part (4b) is not directly connected to the hub (2).
  2. A pump rotor (1) in accordance with claim 1, characterized in that the base part (3e) has at least the same outer diameter as the first and second centrifugal wheel vane parts (3b, 4b), and in that the second centrifugal wheel vane part (4b) is designed extending in the longitudinal direction of the axis of rotation (D) such that a gap (6) extending in the longitudinal direction of the axis of rotation (D) results between the base part (3e) and the second centrifugal wheel vane part (4b).
  3. A pump rotor (1) in accordance with claim 1 or claim 2, characterized in that the first and second centrifugal wheel vane parts (3b, 4b) have the same length in the longitudinal direction of the axis of rotation (D).
  4. A pump rotor (1) in accordance with claim 1 or claim 2, characterized in that the second centrifugal wheel vane part (4b) is designed shorter in the longitudinal direction of the axis of rotation (D) than the first centrifugal wheel vane part (3b).
  5. A pump rotor (1) in accordance with any one of the preceding claims, characterized in that the connection means (5) is designed as a rotor cover (7) which extends concentrically to the axis of rotation (D) and which is fixedly connected to the outer edges (3c, 4c) of the first and second vanes (3, 4), wherein the rotor cover (7) is in particular designed as frustoconical, cylindrical or as a disk.
  6. A pump rotor in accordance with claim 5, characterized in that the rotor cover (7) has a circular opening (7a) which extends concentrically to the axis of rotation (D).
  7. A pump rotor in accordance with any one of the preceding claims, characterized in that the first and second vanes (3, 4) have pitch sections which extend in the direction of rotation (D1) and which extend mutually symmetrically with respect to the axis of rotation (D).
  8. A pump rotor in accordance with claim 7, characterized in that the first and second helical wheel vane parts (3a, 4a) extend mutually symmetrically with respect to the axis of rotation (D).
  9. A pump rotor in accordance with claim 7 or claim 8, characterized in that the first and second centrifugal wheel vane parts (3b, 4b) each have a pressure-side vane flank (3d, 4d); and in that the pressure-side vane flanks (3d, 4d) extend mutually symmetrically with respect to the axis of rotation (D).
  10. A pump rotor in accordance with any one of the preceding claims, characterized in that the hub (2) forms a frustoconcial or disk-shaped base (3e); and in that the first centrifugal wheel vane part (3b) is fixedly connected to the base (3e).
  11. A pump rotor (1) in accordance with any one of the preceding claims, including a plurality of second vanes (4) arranged spaced apart in the direction of rotation (D1).
  12. A pump, in particular a centrifugal pump or an axial flow pump, including a pump rotor (1) in accordance with any one of the previous claims.
EP08787296A 2007-08-16 2008-08-18 Pump rotor and pump comprising a pump rotor of said type Active EP2188532B1 (en)

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EP07114479 2007-08-16
EP08787296A EP2188532B1 (en) 2007-08-16 2008-08-18 Pump rotor and pump comprising a pump rotor of said type
PCT/EP2008/060814 WO2009022019A1 (en) 2007-08-16 2008-08-18 Pump rotor and pump comprising a pump rotor of said type

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EP2188532A1 EP2188532A1 (en) 2010-05-26
EP2188532B1 true EP2188532B1 (en) 2011-10-12

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US (1) US8511966B2 (en)
EP (1) EP2188532B1 (en)
JP (1) JP5238809B2 (en)
CN (1) CN101779043B (en)
AT (1) ATE528511T1 (en)
DK (1) DK2188532T3 (en)
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WO (1) WO2009022019A1 (en)

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SE520416C2 (en) * 1997-11-18 2003-07-08 Flygt Ab Itt Impeller
FI111023B (en) * 1998-12-30 2003-05-15 Sulzer Pumpen Ag Method and apparatus for pumping material and rotor used in connection with the apparatus
US6390768B1 (en) * 1999-03-22 2002-05-21 David Muhs Pump impeller and related components
JP3074982U (en) * 2000-07-19 2001-01-30 財団法人工業技術研究院 Integrated 3D sheet metal blade
JP2004232525A (en) * 2003-01-29 2004-08-19 Heishin Kikai Kogyo Kk Concentrically split impeller and manufacturing method thereof
DE502005002739D1 (en) * 2005-12-21 2008-03-20 Grundfos Management As Impeller for a pump unit and associated pump unit

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RU2010109741A (en) 2011-09-27
RU2470191C2 (en) 2012-12-20
US8511966B2 (en) 2013-08-20
ATE528511T1 (en) 2011-10-15
JP2010537097A (en) 2010-12-02
CN101779043A (en) 2010-07-14
US20100215504A1 (en) 2010-08-26
WO2009022019A1 (en) 2009-02-19
DK2188532T3 (en) 2012-01-30
EP2188532A1 (en) 2010-05-26
JP5238809B2 (en) 2013-07-17
CN101779043B (en) 2013-03-27

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