EP2735744B1 - Impeller for a centrifugal pump with magnets - Google Patents

Impeller for a centrifugal pump with magnets Download PDF

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Publication number
EP2735744B1
EP2735744B1 EP13005445.5A EP13005445A EP2735744B1 EP 2735744 B1 EP2735744 B1 EP 2735744B1 EP 13005445 A EP13005445 A EP 13005445A EP 2735744 B1 EP2735744 B1 EP 2735744B1
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EP
European Patent Office
Prior art keywords
impeller
magnets
impeller according
covering
cap
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.)
Active
Application number
EP13005445.5A
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German (de)
French (fr)
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EP2735744A3 (en
EP2735744A2 (en
Inventor
Günter Strelow
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.)
Wilo SE
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Wilo SE
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Publication of EP2735744A2 publication Critical patent/EP2735744A2/en
Publication of EP2735744A3 publication Critical patent/EP2735744A3/en
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Publication of EP2735744B1 publication Critical patent/EP2735744B1/en
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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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0613—Special connection between the rotor compartments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to an impeller of a centrifugal pump with a rear support disk on which the impeller blades are arranged, permanent magnets being attached to the rear of the support disk for capturing particles contained in the delivery fluid.
  • the US2004 / 0062648 A1 discloses an impeller with an integrated magnetic disc.
  • the object of the invention is to improve an impeller of the type mentioned at the beginning in such a way that, on the one hand, it is reliably prevented that magnetizable particles get into the bearings and the motor rotor space and, on the other hand, the particles are prevented from adhering to the impeller.
  • a disk or cap is attached to the back of the impeller, in or on which the magnets are attached, and that the outer surface of the disk or cap, which faces the flow rate located on the back of the support disk, of is covered by a layer of material.
  • the material layer covering the outer surface of the disc or cap ensures that the magnetizable particles do not adhere to the magnets of the impeller, but are instead conveyed into the pump chamber by the centrifugal forces acting on the back of the impeller and thus conveyed to the pump outlet.
  • the magnets thus have a redirecting effect for the magnetizable particles, whereby it is ensured that they do not stick to the magnets and thus do not impair the efficiency of the impeller.
  • the required magnet strength depends on the gap between the impeller and the housing wall as well as the distribution on the impeller.
  • the construction should be designed in such a way that a low magnetic force is sufficient to safely discharge the particles into the pump chamber.
  • the magnets are encapsulated by the plastic of the impeller support disk.
  • the impeller is preferably an injection molded part made of plastic.
  • the magnets on the impeller are covered by a disk or a cap.
  • the cover consists of a material on which the particles can slide off easily.
  • the cover can also be formed by the injection molded part of the impeller.
  • the surface of the cover or the material is provided with a non-stick coating. It is preferably proposed here that the covering layer is a DLC coating. Optimal results are achieved when the thickness of the cover or the covering material is 0.4 to 2 mm. It is also advantageous if the distance between the rear of the impeller and the pump wall is preferably 2 to 10 mm.
  • the magnet or magnets can also be designed as a ring or segment. It is also proposed that that the magnets are arranged close to the outer diameter of the impeller, evenly distributed over the circumference of the impeller.
  • the impeller is driven by an electric motor, the rotor of which is surrounded by a can or can and around which the conveying medium flows.
  • a motor centrifugal pump has a pump housing 1, in the pump chamber of which the impeller 2 is mounted, which is fastened to the end of the shaft 3 of the wet-running electric motor.
  • the shaft 3 with its motor rotor 4 is surrounded by a can or a can 5 and the conveying medium for motor cooling flows around it.
  • a pump wall 6 separates the pump chamber from the engine compartment.
  • the impeller 2 of the pump has a rear circular support disk 7 made of plastic, on the front side of which the impeller blades 8 are integrally formed in order to convey the pumped liquid reaching the impeller center from the suction channel 9 into the pressure channel 10.
  • the magnetic force acting on the particles has the effect that the particles striving towards the center (shaft) due to the impeller side space flow are deflected by these magnets on the rear of the impeller to the rear wall of the impeller and are pushed back into the pump chamber by the centrifugal force acting here without the motor rotor space within the To reach containment shell or can and without getting into the camp.
  • the magnets can be designed differently, for. B. as a ring, individual magnets or segments.
  • the magnets 12 are encapsulated by the plastic of the support disk 7, so that the impeller is an injection-molded part, the plastic of which covers the magnets 12 by 0.4 to 2 mm.
  • the cover of the magnets 12 is formed by a 0.4 to 2 mm thick rear wall 13 which is attached to the rear of the impeller 2 and is preferably made of plastic.
  • the overlap or the cover can consist of a material on which the particles slide easily.
  • the outer surface of the magnet cover, in particular the additional rear wall 13 is provided with a non-stick coating, in particular with a DLC coating (amorphous carbon layer), so that the particles do not adhere to the rear of the impeller with greater certainty.
  • a non-stick coating in particular with a DLC coating (amorphous carbon layer), so that the particles do not adhere to the rear of the impeller with greater certainty.
  • the distance between the rear of the impeller and the pump wall 6 is preferably 2 to 10 mm. Furthermore, the magnetic flux density of the magnets 12 is preferably 0.02 to 0.2 Tesla.
  • the magnets are fastened in or on the disk 13 or cap which is fastened to the rear of the impeller.
  • the outer surface of the disk or cap is covered by an in particular non-magnetic material. Otherwise, the same applies to the execution. technical characteristics.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft ein Laufrad einer Kreiselpumpe mit einer rückseitigen Tragscheibe, auf der die Laufradschaufeln angeordnet sind, wobei auf der Rückseite der Tragscheibe Permanentmagnete befestigt sind, zum Einfangen von in der Förderflüssigkeit enthaltenen Partikeln.The invention relates to an impeller of a centrifugal pump with a rear support disk on which the impeller blades are arranged, permanent magnets being attached to the rear of the support disk for capturing particles contained in the delivery fluid.

Es ist aus der FR 1 490 440 bekannt, auf der Rückseite des Laufrads einer Kreiselpumpe Permanentmagnete zu befestigen, damit diese magnetisierbare Partikel einfangen. Die Partikel bleiben hierbei am Magnet haften und bilden Strömungswiderstände, so dass der Wirkungsgrad des Laufrades verschlechtert wird.It's from the FR 1 490 440 known to attach permanent magnets on the back of the impeller of a centrifugal pump so that they capture magnetizable particles. The particles stick to the magnet and form flow resistance, so that the efficiency of the impeller is reduced.

Die US2004/0062648 A1 offenbart ein Laufrad mit einer integrierten Magnetscheibe.The US2004 / 0062648 A1 discloses an impeller with an integrated magnetic disc.

Aufgabe der Erfindung ist es, ein Laufrad der eingangs genannten Art so zu verbessern, dass zum einen sicher verhindert wird, dass magnetisierbare Partikel in die Lager und in den Motoren-Rotorraum gelangen und zum anderen ein Anhaften der Partikel am Laufrad verhindert wird.The object of the invention is to improve an impeller of the type mentioned at the beginning in such a way that, on the one hand, it is reliably prevented that magnetizable particles get into the bearings and the motor rotor space and, on the other hand, the particles are prevented from adhering to the impeller.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass an der Rückseite des Laufrades eine Scheibe oder Kappe befestigt ist, in oder an der die Magnete befestigt sind, und dass die äußere Oberfläche der Scheibe oder Kappe, die dem auf der Tragscheibenrückseite befindlichen Förderstrom zugewandt ist, von einer Materialschicht überdeckt ist.This object is achieved according to the invention in that a disk or cap is attached to the back of the impeller, in or on which the magnets are attached, and that the outer surface of the disk or cap, which faces the flow rate located on the back of the support disk, of is covered by a layer of material.

Die die äußere Oberfläche der Scheibe oder Kappe abdeckende Materialschicht sorgt dafür, dass die magnetisierbaren Partikel an den Magneten des Laufrades nicht anhaften, sondern durch die auf der Rückseite des Laufrads wirkenden Zentrifugalkräfte in die Pumpenkammer gefördert und damit zum Pumpenauslass gefördert werden. Die Magnete haben damit für die magnetisierbaren Partikel eine umleitende Wirkung, wobei sichergestellt ist, dass sie an den Magneten nicht haften bleiben und somit den Wirkungsgrad des Laufrades nicht verschlechtern.The material layer covering the outer surface of the disc or cap ensures that the magnetizable particles do not adhere to the magnets of the impeller, but are instead conveyed into the pump chamber by the centrifugal forces acting on the back of the impeller and thus conveyed to the pump outlet. The magnets thus have a redirecting effect for the magnetizable particles, whereby it is ensured that they do not stick to the magnets and thus do not impair the efficiency of the impeller.

Die benötigte Magnetstärke richtet sich nach dem Spalt zwischen dem Laufrad und der Gehäusewand sowie der Verteilung am Laufrad. Die Konstruktion sollte dabei so ausgeführt sein, dass eine geringe Magnetkraft ausreicht, um die Partikel sicher in den Pumpenraum abzuführen.The required magnet strength depends on the gap between the impeller and the housing wall as well as the distribution on the impeller. The construction should be designed in such a way that a low magnetic force is sufficient to safely discharge the particles into the pump chamber.

In einer Ausführung, die nicht zur Erfindung gehört, sind die Magnete vom Kunststoff der Laufradtragscheibe umspritzt. Hierbei ist das Laufrad vorzugsweise ein Spritzgussteil aus Kunststoff. In einer alternativen Ausführung sind die Magnete am Laufrad durch eine Scheibe oder eine Kappe abgedeckt. Bei allen Ausführungen ist von Vorteil, wenn die Abdeckung aus einem Material besteht, an dem die Partikel leicht abgleiten können. Die Abdeckung kann aber auch durch das Spritzgussteil des Laufrades gebildet sein.In an embodiment that does not belong to the invention, the magnets are encapsulated by the plastic of the impeller support disk. The impeller is preferably an injection molded part made of plastic. In an alternative embodiment, the magnets on the impeller are covered by a disk or a cap. In all designs it is advantageous if the cover consists of a material on which the particles can slide off easily. The cover can also be formed by the injection molded part of the impeller.

Besonders vorteilhaft ist es, wenn die Oberfläche der Abdeckung oder des Materials mit einer Antihaftbeschichtung versehen ist. Vorzugsweise wird hierbei vorgeschlagen, dass die überdeckende Schicht eine DLC-Beschichtung ist. Optimale Ergebnisse werden erzielt, wenn die Dicke der Abdeckung oder des abdeckenden Materials 0,4 bis 2 mm beträgt. Auch ist von Vorteil, wenn der Abstand der Laufradrückseite zur Pumpenwand vorzugsweise 2 bis 10 mm beträgt.It is particularly advantageous if the surface of the cover or the material is provided with a non-stick coating. It is preferably proposed here that the covering layer is a DLC coating. Optimal results are achieved when the thickness of the cover or the covering material is 0.4 to 2 mm. It is also advantageous if the distance between the rear of the impeller and the pump wall is preferably 2 to 10 mm.

Eine optimale Wirkung wird erzielt, wenn die magnetische Flussdichte der Magnete vorzugsweise 0,02 bis 0,2 Tesla beträgt. Auch können der bzw. die Magnete als Ring oder Segment ausgeführt sein. Ferner wird vorgeschlagen, dass die Magnete nahe des Laufradaußendurchmessers, gleichförmig über den Umfang des Laufrades verteilt angeordnet sind.An optimal effect is achieved when the magnetic flux density of the magnets is preferably 0.02 to 0.2 Tesla. The magnet or magnets can also be designed as a ring or segment. It is also proposed that that the magnets are arranged close to the outer diameter of the impeller, evenly distributed over the circumference of the impeller.

Auch ist von Vorteil, wenn das Laufrad von einem Elektromotor angetrieben ist, dessen Rotor von einem Spaltrohr oder Spalttopf umgeben und vom Fördermedium umströmt ist.It is also advantageous if the impeller is driven by an electric motor, the rotor of which is surrounded by a can or can and around which the conveying medium flows.

Zwei Ausführungsbeispiele, die nicht zur Erfindung gehören, sind in den Zeichnungen in axialen Schnitten dargestellt und werden im Folgenden näher beschrieben. Es zeigen

Fig. 1
eine Motorkreiselpumpe mit einem Pumpenlaufrad, in dessen rückseitiger Tragscheibe die Permanentmagnete vom Kunststoff der Tragscheibe umgeben sind,
Fig. 2
eine Motorkreiselpumpe, bei der die auf der Rückseite der Laufradtragscheibe eingelassenen Permanentmagnete von einer zusätzlichen Rückwand des Laufrades überdeckt sind.
Two exemplary embodiments that do not belong to the invention are shown in the drawings in axial sections and are described in more detail below. Show it
Fig. 1
a motor centrifugal pump with a pump impeller, in whose rear support disk the permanent magnets are surrounded by the plastic of the support disk,
Fig. 2
a motor centrifugal pump in which the permanent magnets embedded on the back of the impeller support disc are covered by an additional rear wall of the impeller.

Eine Motorkreiselpumpe weist ein Pumpengehäuse 1 auf, in deren Pumpenkammer das Laufrad 2 gelagert ist, das auf dem Ende der Welle 3 des Nassläufer-Elektromotors befestigt ist. Hierbei ist die Welle 3 mit ihrem Motorenrotor 4 von einem Spaltrohr oder einem Spalttopf 5 umgeben und vom Fördermedium zur Motorenkühlung umströmt. Eine Pumpenwand 6 trennt die Pumpenkammer von dem Motorenraum.A motor centrifugal pump has a pump housing 1, in the pump chamber of which the impeller 2 is mounted, which is fastened to the end of the shaft 3 of the wet-running electric motor. Here, the shaft 3 with its motor rotor 4 is surrounded by a can or a can 5 and the conveying medium for motor cooling flows around it. A pump wall 6 separates the pump chamber from the engine compartment.

Das Laufrad 2 der Pumpe weist eine rückseitige kreisförmige Tragscheibe 7 aus Kunststoff auf, auf deren Vorderseite die Laufradschaufeln 8 angeformt sind, um die vom Saugkanal 9 in das Laufradzentrum gelangende Förderflüssigkeit in den Druckkanal 10 zu fördern.The impeller 2 of the pump has a rear circular support disk 7 made of plastic, on the front side of which the impeller blades 8 are integrally formed in order to convey the pumped liquid reaching the impeller center from the suction channel 9 into the pressure channel 10.

Im Zwischenraum 11 zwischen der Pumpenwand 6 und der Laufradrückseite sammeln sich leicht Partikel an, die in den Rotorraum und in die Lager der Welle 3 gelangen können und den Verschleiß beschleunigen. Um diese Partikel so früh wie möglich heraus zu befördern, sind in der Rückseite der Tragscheibe 7 des Laufrades 2 von einer vorzugsweise nicht magnetischen Materialschicht insbesondere Kunststoffschicht 2a bedeckte Permanentmagnete 12 befestigt, die auf die im Zwischenraum 11 befindliche Flüssigkeit einwirken. Dies führt dazu, dass in der Flüssigkeit befindliche Partikel aus magnetisierbarem Metall von dem Magneten 12 angezogen werden, ohne an den Permanentmagneten haften zu bleiben. Vielmehr bewirkt die auf die Partikel wirkende Magnetkraft, dass die durch die Radseitenraumströmung zum Zentrum (Welle) strebenden Partikel durch diese Magnete an der Laufradrückseite zur Laufradrückwand abgelenkt werden und durch die hier wirkende Zentrifugalkraft in die Pumpenkammer zurückgedrängt werden, ohne den Motoren-Rotorraum innerhalb des Spalttopfes bzw. Spaltrohres zu erreichen und ohne in die Lager zu gelangen. Die Magnete können hierbei unterschiedlich ausgeführt sein, z. B. als Ring, Einzelmagnete oder Segmente.In the space 11 between the pump wall 6 and the rear of the impeller, particles easily collect, which can get into the rotor space and the bearings of the shaft 3 and accelerate the wear. In order to get these particles out as early as possible, 7 of the Permanent magnets 12, which are covered by a preferably non-magnetic material layer, in particular plastic layer 2a, are attached to the impeller 2 and act on the liquid located in the intermediate space 11. This has the result that particles of magnetizable metal located in the liquid are attracted by the magnet 12 without sticking to the permanent magnets. Rather, the magnetic force acting on the particles has the effect that the particles striving towards the center (shaft) due to the impeller side space flow are deflected by these magnets on the rear of the impeller to the rear wall of the impeller and are pushed back into the pump chamber by the centrifugal force acting here without the motor rotor space within the To reach containment shell or can and without getting into the camp. The magnets can be designed differently, for. B. as a ring, individual magnets or segments.

In der in Fig. 1 gezeigten Ausführung sind die Magnete 12 vom Kunststoff der Tragscheibe 7 umspritzt, so dass das Laufrad ein Spritzgussteil ist, dessen Kunststoff mit 0,4 bis 2 mm die Magnete 12 überdeckt. Stattdessen ist in der Ausführung nach Fig. 2 die Abdeckung der Magnete 12 von einer 0,4 bis 2 mm dicken Rückwand 13 gebildet, die an der Rückseite des Laufrades 2 befestigt ist und vorzugsweise aus Kunststoff besteht. Hierbei kann die Überdeckung oder die Abdeckung aus einem Material bestehen, an dem die Partikel leicht abgleiten.In the in Fig. 1 In the embodiment shown, the magnets 12 are encapsulated by the plastic of the support disk 7, so that the impeller is an injection-molded part, the plastic of which covers the magnets 12 by 0.4 to 2 mm. Instead, it is under execution after Fig. 2 the cover of the magnets 12 is formed by a 0.4 to 2 mm thick rear wall 13 which is attached to the rear of the impeller 2 and is preferably made of plastic. Here, the overlap or the cover can consist of a material on which the particles slide easily.

Damit die Partikel an der Laufradrückseite mit größerer Sicherheit nicht haften bleiben, ist in einer weiteren Ausführung die äußere Oberfläche der Magnetabdeckung insbesondere der zusätzlichen Rückwand 13 mit einer Antihaftbeschichtung insbesondere mit einer DLC-Beschichtung (amorphen Kohlenstoffschicht) versehen.In a further embodiment, the outer surface of the magnet cover, in particular the additional rear wall 13, is provided with a non-stick coating, in particular with a DLC coating (amorphous carbon layer), so that the particles do not adhere to the rear of the impeller with greater certainty.

Der Abstand der Laufradrückseite zur Pumpenwand 6 beträgt vorzugsweise 2 bis 10 mm. Ferner beträgt die magnetische Flussdichte der Magnete 12 vorzugsweise 0,02 bis 0,2 Tesla.The distance between the rear of the impeller and the pump wall 6 is preferably 2 to 10 mm. Furthermore, the magnetic flux density of the magnets 12 is preferably 0.02 to 0.2 Tesla.

In einer nicht dargestellten weiteren Ausführung, die einzige Ausführung gemäß der Erfindung, sind die Magnete in oder an der Scheibe 13 oder Kappe befestigt, die an der Rückseite des Laufrades befestigt ist. Hierbei ist wiederum die äußere Oberfläche der Scheibe oder Kappe von einem insbesondere nicht magnetischen Material bedeckt. Im Übrigen gelten für die Ausführung dieselben o.g. technischen Merkmale.In a further embodiment, not shown, the only embodiment according to the invention, the magnets are fastened in or on the disk 13 or cap which is fastened to the rear of the impeller. Here, in turn, the outer surface of the disk or cap is covered by an in particular non-magnetic material. Otherwise, the same applies to the execution. technical characteristics.

Claims (11)

  1. Impeller (2) of a rotary pump with a rear support plate (7) on which the impeller vanes (8) are arranged, in which permanent magnets (12) are attached on the back of the support plate to capture particles contained in the pumped liquid, characterised by a disc (13) or cap being mounted on the rear of the impeller (2), in or on which the magnets are mounted, and by the outer surface of the disc or cap facing the flow on the back of the support plate being covered by a layer of material (2a).
  2. Impeller according to claim 1, characterised by the covering (2a) consisting of a material on which the particles slide easily.
  3. Impeller according to claim 1 or 2, characterised by the covering (2a) being formed by the material of the disc (13) or cap.
  4. Impeller according to one of the preceding claims, characterised by the surface of the covering (13) having a non-stick coating.
  5. Impeller according to one of the preceding claims, characterised by the covering layer being a DLC coating.
  6. Impeller according to one of the preceding claims, characterised by the thickness of the covering (13) being 0.4 to 2 mm.
  7. Impeller according to one of the preceding claims, characterised by the distance between the rear of the impeller and the wall of the pump (6) preferably being 2 to 10 mm.
  8. Impeller according to one of the preceding claims, characterised by the magnetic flux density of the magnets (12) preferably being 0.02 to 0.2 Tesla.
  9. Impeller according to one of the preceding claims, characterised by the magnet(s) (12) being carried out as a ring or segment.
  10. Impeller according to one of the preceding claims, characterised by the magnets (12) being arranged close to the outer diameter of the impeller, distributed evenly spaced along the circumference of the impeller (2).
  11. Impeller according to one of the preceding claims, characterised by the impeller being driven by an electric motor, the rotor of which is surrounded by a split tube or separating can with the conveying medium flowing around it.
EP13005445.5A 2012-11-23 2013-11-20 Impeller for a centrifugal pump with magnets Active EP2735744B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012022851.1A DE102012022851A1 (en) 2012-11-23 2012-11-23 Impeller of a centrifugal pump with magnets

Publications (3)

Publication Number Publication Date
EP2735744A2 EP2735744A2 (en) 2014-05-28
EP2735744A3 EP2735744A3 (en) 2017-08-16
EP2735744B1 true EP2735744B1 (en) 2020-10-28

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EP13005445.5A Active EP2735744B1 (en) 2012-11-23 2013-11-20 Impeller for a centrifugal pump with magnets

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EP (1) EP2735744B1 (en)
DE (1) DE102012022851A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020003854A1 (en) 2020-06-26 2021-12-30 KSB SE & Co. KGaA Centrifugal pump for pumping media containing solids
EP4056851A1 (en) * 2021-03-09 2022-09-14 Metso Outotec Sweden AB Wear element for a slurry pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809777A1 (en) * 2000-05-30 2001-12-07 Jeumont Ind Motorized mixer for circulating fluid inside container comprises motor and stator, rotor carrying circulating blades, and passive magnetic bearing between permanent magnets

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1490440A (en) 1966-08-29 1967-07-28 Glutz Blotzheim Nachfolger A G Circulation pump
DE10009376A1 (en) * 2000-02-29 2001-08-30 Wilo Gmbh Motor-driven pump has wet rotor between suction port and impeller wheel with central suction opening enclosed by hollow cylindrical shaft carrying rotor's permanent magnets
DE10216402A1 (en) * 2002-04-12 2003-10-23 Wilo Gmbh Centrifugal pump with integrated magnetic filter
US6881033B2 (en) * 2002-09-30 2005-04-19 Fisher & Paykel Healthcare Limited Impeller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809777A1 (en) * 2000-05-30 2001-12-07 Jeumont Ind Motorized mixer for circulating fluid inside container comprises motor and stator, rotor carrying circulating blades, and passive magnetic bearing between permanent magnets

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EP2735744A3 (en) 2017-08-16
DE102012022851A1 (en) 2014-05-28
EP2735744A2 (en) 2014-05-28

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