EP2535590A2 - Circulation pump with integrated cutting assembly - Google Patents
Circulation pump with integrated cutting assembly Download PDFInfo
- Publication number
- EP2535590A2 EP2535590A2 EP12168834A EP12168834A EP2535590A2 EP 2535590 A2 EP2535590 A2 EP 2535590A2 EP 12168834 A EP12168834 A EP 12168834A EP 12168834 A EP12168834 A EP 12168834A EP 2535590 A2 EP2535590 A2 EP 2535590A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- cutting
- centrifugal pump
- motor
- pump assembly
- 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.)
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
- B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps 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
- F04D7/045—Pumps 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
Definitions
- the invention relates to a centrifugal pump assembly with a cutting mechanism, which is arranged in front of the inflow of the medium in an impeller, the cutting mechanism having a cutting surface with openings through which the medium flows and has a rotating cutting body, which abuts the cutting surface, wherein the cutting body and the Impeller be put together by a motor in rotation.
- the pumps and piping When pumping municipal sewage with coarse and fibrous admixtures, the pumps and piping must be very large in size so that they have a sufficiently large cross-section to prevent clogging.
- the pumps and pipelines take up a lot of space and represent a high investment requirement.
- the cutting unit In order to be able to use even smaller pumps and pipelines, a cutting unit must be used to prevent clogging, as in the DE 20 2009 003 995 U1 is described.
- the cutting unit is installed in the pipeline via a flange connection.
- the cutting mechanism has a cutting surface with openings.
- the medium flows through the openings.
- a rotating cutting body In front of the cutting surface, a rotating cutting body is arranged, which abuts against the cutting surface and the openings extends over its rotation.
- the cutting body is driven by a motor.
- the medium enters the cutting unit through an inlet opening, is deflected by 90 ° and then exits through an outlet opening.
- the minced Medium can then be supplied to a pump.
- the cutting unit is an additional separate component with its own drive, which is installed in the pipeline in front of the pump.
- centrifugal pumps are used with integrated cutting unit.
- the DE 196 43 729 A1 describes a device for the promotion of manure.
- the device has a housing designed as a double-chamber container.
- the dual-chamber container is separated by a liquid-permeable partition into a settling chamber and an outlet space.
- the liquid-permeable partition wall forms a cutting unit with a rotating cutting element.
- a drive shaft drives a rotary pump and the cutting element.
- the present invention seeks to provide a centrifugal pump with integrated cutting, which has a high efficiency and their cutting ensures a high cutting efficiency even over long periods of operation.
- the motor is associated with a control device which can circulate the impeller and the cutting body at intervals in different directions of rotation, wherein the blades of the impeller extend in a purely radial direction, so that the centrifugal pump in both directions of rotation the same characteristic having.
- the centrifugal pump assembly includes an impeller driven by a shaft that is rotated by a motor.
- the centrifugal pump arrangement comprises a control device which is set up to operate the motor in different directions of rotation. As a result, run the impeller and the cutting body together at intervals in changing rotational directions.
- the regular reversal of direction can be done by an electric motor with a corresponding rear derailleur as a control device, which are suitable as an electric motor, in particular a three-phase synchronous motor, an asynchronous motor, a DC motor or an AC motor.
- the reversal of direction causes a self-sharpening effect of the cutting unit.
- the running cutting edges of the rotating cutting body and the cutting surface are sharpened while the leading edges wear out.
- a regular change of the direction of rotation ensures that the cutting ability is maintained. This ensures a long life of the cutting unit.
- an impeller is used whose blades extend straight from the axis of rotation to the outside.
- a rotational direction-independent conveying characteristic of the centrifugal pump is achieved.
- the characteristic curve and the power consumption and thus the impeller effect are the same in both directions of rotation.
- the flow space between the impeller and the housing is formed mirror-symmetrically to the discharge nozzle axis.
- the impeller is surrounded by an annular space housing.
- annular space housing By such a housing, in contrast to a spiral housing, a direction of rotation-independent conveying characteristic is achieved.
- the pump characteristic and the efficiency curve of the centrifugal pump are identical in both directions of rotation.
- the cutting body is rotatably connected to the impeller. It proves to be particularly advantageous if the cutting body is fastened via a fastening means on the end face of the shaft which drives the impeller.
- a bore through the cutting body, the impeller and the shaft is introduced centrally of the axis of rotation of the shaft, which receives the fastener.
- the fastening means is preferably designed as a screw.
- the bore has a thread in the region of the impeller and / or the shaft into which the screw engages.
- the cutting body can also be connected by means of a pin with the impeller rotationally fixed.
- the cutting surface is integrated in the suction cover of the centrifugal pump and fills the entire intake cross-sectional area of the suction nozzle.
- Fig. 1 shows a centrifugal pump with integrated cutting unit 1.
- the cutting unit 1 is located in front of the inflow of the medium in the impeller 2 ,.
- the cutting unit 1 comprises a fixed cutting surface 3 and a rotating cutting body 4.
- the cutting surface 3 is executed in the embodiment as a circular, flat cutting plate having openings 5 through which the medium flows.
- the cutting surface 3 is integrated in the suction cover 6 of the centrifugal pump and fills the entire inflow cross-sectional area.
- the cutting body 4 rotates and thereby passes over the openings 5.
- the cutting body 4 comprises knives 7, which rest on the cutting surface 3. They are pressed with a contact force F against the cutting surface 3.
- the cutting body 4 is fixed to the end face of a shaft 8.
- the cutting body 4 and the impeller 2 are provided centrally to its axis of rotation with a bore 9, which continues in the end face of the shaft 8.
- a fastener 10 is inserted in the hole 9, a fastener 10 is inserted.
- the fastening element 10 is a screw which engages in a thread which has the bore 9 in the region of the shaft 8.
- the cutting body 4 is rotatably connected to the impeller 2 and the shaft 8.
- the shaft 8 is driven by a motor 11.
- This is an electric motor comprising a stator 12 and a rotor 13.
- the motor 11 is surrounded by a motor housing 14.
- the impeller 2 is surrounded by a housing 15.
- the blades 16 of the impeller 2 are integrally formed on a cover plate 17. Through the discharge port 18, the medium leaves the centrifugal pump.
- the required for mounting division of the motor housing 14 from the housing 15 is not shown for reasons of clarity.
- the impeller 2 and the cutting body 4 are rotated together by the motor 11 in rotation.
- the cutting body 4 is pressed with a force F against the cutting surface 3.
- a control device is associated with the motor 11, which rotates the impeller 2 and the cutting body 4 at intervals in opposite directions of rotation.
- the time intervals for each direction of rotation are the same length.
- Fig. 2 shows a front view of the cutting unit 1.
- the cutting surface 3 is designed as a circular cutting plate, which is provided with openings 5 through which the medium flows.
- the cutting body 4 comprises four wings 19, which cover the openings 5, the cutting surface 3.
- the wings 19 are integrally formed on a cylindrical base body 20 and extending from the axis of rotation straight in the purely radial direction to the outside.
- Each wing 19 has at its the cutting surface 3 facing Page a knife 7 on.
- the knives 7 of the cutting body 4 lie directly against the cutting surface 3.
- the cutting body 4 is fastened via a fastening means 10 on the end face of the shaft 8.
- a screw is used as a fastening means 10.
- Fig. 3 shows a radial section of the impeller 2 and the housing 15.
- the blades 16 of the impeller 2 are integrally formed on a cover plate 17 and run in a star shape toward the axis of rotation. They are formed in a straight line in a purely radial direction and thus do not show the usual curve with centrifugal pumps.
- the arrangement of the blades 16 is mirror-symmetrical to the pressure nozzle axis 21st
- the medium enters the impeller 2, flows past the blades 16 and leaves the centrifugal pump through the discharge nozzle 18.
- the impeller 3 is fixed by means of a fastening means 10 on the end face of the shaft 8.
- the impeller 2 is surrounded by a housing 15, which is designed according to the invention as an annular housing, so that the impeller 2 has the same conveying characteristic in both directions of rotation.
- the flow space 23 between the impeller 2 and the housing 15 is mirror-symmetrical to the discharge nozzle axis 21.
- Fig. 4 shows a perspective view of a centrifugal pump with integrated cutting unit 1.
- the cutting edges are formed directly on the wings 19, so that no additional knives 7 are required in contrast to the variant described above.
- the wings 19 are located directly on the cutting surface 3.
- the wings 19 are integrally formed on a cylindrical base body 20 and extend in a star shape to the outside.
- the suction cover 6 has a recess into which the cutting surface 3 designed as a circular cutting insert fits flush. Through the openings 5 the cutting plate 3, the medium is sucked. During rotation, the wings 19 of the cutting body 4 overlap the openings 5.
- the impeller 2 has blades 16 which extend in a straight line in the purely radial direction to the outside.
- the blades 16 are formed as cuboid elevations on the cover plate 17 of the impeller 2.
- the impeller 2 and the cutting body 4 are in the in Fig. 4 variant shown connected via a pin 24 rotatably connected to each other.
- the impeller 2 is rotated by the shaft 8. Due to the connection of the impeller 2 with the cutting body 4 via the pin 24, the cutting body 4 rotates at the same speed as impeller 2 and shaft eighth
- the cutting body 4 is arranged axially displaceably on a piston 25.
Abstract
Description
Die Erfindung betrifft eine Kreiselpumpenanordnung mit einem Schneidwerk, das vor dem Zustrom des Mediums in ein Laufrad angeordnet ist, wobei das Schneidwerk eine Schneidfläche mit Öffnungen durch die das Medium strömt und einen rotierenden Schneidkörper aufweist, der an der Schneidfläche anliegt, wobei der Schneidkörper und das Laufrad gemeinsam von einem Motor in Rotation versetzt werden.The invention relates to a centrifugal pump assembly with a cutting mechanism, which is arranged in front of the inflow of the medium in an impeller, the cutting mechanism having a cutting surface with openings through which the medium flows and has a rotating cutting body, which abuts the cutting surface, wherein the cutting body and the Impeller be put together by a motor in rotation.
Bei der Förderung von kommunalen Abwässern mit groben und fasrigen Beimengungen müssen die Pumpen und Rohrleitungen sehr groß dimensioniert sein, so dass sie einen ausreichend großen Querschnitt aufweisen, damit es nicht zu Verstopfungen kommt. Die Pumpen und Rohrleitungen nehmen dadurch viel Raum ein und stellen einen hohen Investitionsbedarf dar.When pumping municipal sewage with coarse and fibrous admixtures, the pumps and piping must be very large in size so that they have a sufficiently large cross-section to prevent clogging. The pumps and pipelines take up a lot of space and represent a high investment requirement.
Um auch kleinere Pumpen und Rohrleitungen einsetzen zu können, muss zur Vermeidung von Verstopfungen ein Schneidwerk verwendet werden, wie es in der
Im Gegensatz dazu wird bei gattungsgemäßen Vorrichtungen gemäß dem Oberbegriff der Erfindung Kreiselpumpen mit integriertem Schneidwerk eingesetzt. Die Zerkleinerung der festen Bestandteile erfolgt mittels eines Schneidwerks, bei dem das Medium durch Öffnungen strömt, die in einer Schneidfläche eingebracht sind, wobei vor und/oder nach der Schneidfläche ein rotierender Schneidkörper an der Schneidfläche anliegt.In contrast, in generic devices according to the preamble of the invention centrifugal pumps are used with integrated cutting unit. The comminution of the solid components by means of a cutting unit, in which the medium flows through openings which are introduced in a cutting surface, wherein before and / or after the cutting surface, a rotating cutting body rests against the cutting surface.
Es sind im Stand der Technik allerdings auch ganz andere Prinzipien zur Feststoffzerkleinerung bekannt, bei denen, im Gegensatz zu den gattungsgemäßen Vorrichtungen, kein Schneidwerk zur Feststoffzerkleinerung eingesetzt wird.However, completely different principles for comminution of solids are known in the prior art, in which, in contrast to the generic devices, no cutting unit for solids comminution is used.
So wird in der
Auch in der
Die
Mit zunehmender Betriebsdauer nimmt bei Schneidwerken die Schneidwirkung aufgrund des Verschleißes der Schneidkanten ab. Dadurch steigt die Verstopfungsgefahr. Hauptursache für den Verschleiß sind mineralische oder metallische Beimengungen im Abwasser, die dazu führen, dass die auflaufenden Schneidkanten sowohl des rotierenden als auch des feststehenden Teils stumpf werden. Die ablaufenden Kanten sind davon nicht betroffen.With increasing operating time, the cutting action of cutters decreases due to the wear of the cutting edges. This increases the risk of clogging. The main cause of wear is mineral or metallic admixtures in the waste water, which cause the leading edges of both the rotating and fixed parts to become dull. The running edges are not affected.
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine Kreiselpumpe mit integriertem Schneidwerk anzugeben, die einen hohen Wirkungsgrad aufweist und deren Schneidwerk auch über lange Betriebsphasen eine hohe Schneidwirkung gewährleistet.Against this background, the present invention seeks to provide a centrifugal pump with integrated cutting, which has a high efficiency and their cutting ensures a high cutting efficiency even over long periods of operation.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass dem Motor eine Steuereinrichtung zugeordnet ist, welche das Laufrad und den Schneidkörper intervallweise in unterschiedlichen Rotationsrichtungen umlaufen lässt, wobei sich die Schaufeln des Laufrades in rein radialer Richtung erstrecken, so dass die Kreiselpumpe in beiden Rotationsrichtungen die gleiche Kennlinie aufweist.This object is achieved in that the motor is associated with a control device which can circulate the impeller and the cutting body at intervals in different directions of rotation, wherein the blades of the impeller extend in a purely radial direction, so that the centrifugal pump in both directions of rotation the same characteristic having.
Die Kreiselpumpenanordnung umfasst ein Laufrad, das von einer Welle angetrieben wird, die von einem Motor in Rotation versetzt wird. Erfindungsgemäß umfasst die Kreiselpumpenanordnung eine Steuereinrichtung, die dazu eingerichtet ist, den Motor in unterschiedlichen Rotationsrichtungen zu betreiben. Dadurch laufen das Laufrad und der Schneidkörper gemeinsam intervallweise in wechselnden Rotationsrichtungen um.The centrifugal pump assembly includes an impeller driven by a shaft that is rotated by a motor. According to the invention, the centrifugal pump arrangement comprises a control device which is set up to operate the motor in different directions of rotation. As a result, run the impeller and the cutting body together at intervals in changing rotational directions.
Die regelmäßige Drehrichtungsumkehr kann durch einen Elektromotor mit entsprechendem Schaltwerk als Steuereinrichtung erfolgen, wobei als Elektromotor insbesondere ein dreiphasiger Synchronmotor, ein Asynchronmotor, ein Gleichstrommotor oder ein Allstrommotor eignen. Die Drehrichtungsumkehr bewirkt eine selbst schärfende Wirkung des Schneidwerks. Dabei werden die ablaufenden Schneidkanten des rotierenden Schneidkörpers und der Schneidfläche geschärft, während die auflaufenden Kanten verschleißen. Durch einen regelmäßigen Wechsel der Drehrichtung wird gewährleistet, dass die Schneidfähigkeit erhalten bleibt. Damit wird eine hohe Lebensdauer des Schneidwerks gesichert.The regular reversal of direction can be done by an electric motor with a corresponding rear derailleur as a control device, which are suitable as an electric motor, in particular a three-phase synchronous motor, an asynchronous motor, a DC motor or an AC motor. The reversal of direction causes a self-sharpening effect of the cutting unit. The running cutting edges of the rotating cutting body and the cutting surface are sharpened while the leading edges wear out. A regular change of the direction of rotation ensures that the cutting ability is maintained. This ensures a long life of the cutting unit.
Erfindungsgemäß wird ein Laufrad eingesetzt, dessen Schaufeln sich ausgehend von der Drehachse geradlinig nach außen erstrecken. Durch Verwendung eines Laufrades mit einer Beschaufelung, die sich geradlinig in rein radialer Richtung nach außen erstreckt, wird eine drehrichtungsunabhängige Fördercharakteristik der Kreiselpumpe erreicht. Im Gegensatz zu herkömmlichen Kreiselpumpen, mit gekrümmtem Schaufelverlauf, ist die Kennlinie und die Leistungsaufnahme und somit die Laufradwirkung in beiden Drehrichtungen gleich.According to the invention, an impeller is used whose blades extend straight from the axis of rotation to the outside. By using an impeller with a blading, which extends in a straight line in a purely radial outward direction, a rotational direction-independent conveying characteristic of the centrifugal pump is achieved. In contrast to conventional centrifugal pumps, with a curved blade profile, the characteristic curve and the power consumption and thus the impeller effect are the same in both directions of rotation.
Bei einer besonders vorteilhaften Ausführung ist der Strömungsraum zwischen Laufrad und Gehäuse spiegelsymmetrisch zur Druckstutzenachse ausgebildet. Vorzugsweise wird das Laufrad von einem Ringraumgehäuse umgeben. Durch ein solches Gehäuse wird, im Gegensatz zu einem Spiralgehäuse, eine drehrichtungsunabhängige Fördercharakteristik erreicht. Die Pumpenkennlinie und die Wirkungsgradkennlinie der Kreiselpumpe sind in beiden Rotationsrichtungen identisch.In a particularly advantageous embodiment, the flow space between the impeller and the housing is formed mirror-symmetrically to the discharge nozzle axis. Preferably, the impeller is surrounded by an annular space housing. By such a housing, in contrast to a spiral housing, a direction of rotation-independent conveying characteristic is achieved. The pump characteristic and the efficiency curve of the centrifugal pump are identical in both directions of rotation.
Der Schneidkörper ist mit dem Laufrad drehfest verbunden. Dabei erweist es sich als besonders günstig, wenn der Schneidkörper über ein Befestigungsmittel an der Stirnseite der Welle befestigt ist, die das Laufrad antreibt. Bei einer vorteilhaften Ausführung der Erfindung wird mittig zur Drehachse der Welle eine Bohrung durch den Schneidkörper, das Laufrad und die Welle eingebracht, die das Befestigungsmittel aufnimmt. Das Befestigungsmittel ist vorzugsweise als Schraube ausgeführt. Die Bohrung weist im Bereich des Laufrades und/oder der Welle ein Gewinde auf, in das die Schraube greift. Alternativ oder ergänzend dazu kann der Schneidkörper auch mittels eines Stiftes mit dem Laufrad rotationsfest verbunden werden.The cutting body is rotatably connected to the impeller. It proves to be particularly advantageous if the cutting body is fastened via a fastening means on the end face of the shaft which drives the impeller. In an advantageous embodiment of the invention, a bore through the cutting body, the impeller and the shaft is introduced centrally of the axis of rotation of the shaft, which receives the fastener. The fastening means is preferably designed as a screw. The bore has a thread in the region of the impeller and / or the shaft into which the screw engages. Alternatively or additionally, the cutting body can also be connected by means of a pin with the impeller rotationally fixed.
Bei einer besonders vorteilhaften Ausführung der Erfindung ist die Schneidfläche in den Saugdeckel der Kreiselpumpe integriert und füllt die gesamte Ansaug-Querschnittsfläche des Saugstutzens aus.In a particularly advantageous embodiment of the invention, the cutting surface is integrated in the suction cover of the centrifugal pump and fills the entire intake cross-sectional area of the suction nozzle.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der Beschreibung von Ausführungsbeispielen anhand von Zeichnungen und aus den Zeichnungen selbst. Dabei zeigt
- Fig. 1
- einen Axialschnitt einer Kreiselpumpe mit integriertem Schneidwerk,
- Fig. 2
- eine Vorderansicht des Schneidwerks,
- Fig. 3
- einen Radialschnitt des Laufrades und Gehäuses,
- Fig. 4
- eine perspektivische Darstellung einer Kreiselpumpe mit integriertem Schneidwerk.
- Fig. 1
- an axial section of a centrifugal pump with integrated cutting unit,
- Fig. 2
- a front view of the cutting unit,
- Fig. 3
- a radial section of the impeller and housing,
- Fig. 4
- a perspective view of a centrifugal pump with integrated cutting unit.
Der Schneidkörper 4 ist an der Stirnseite einer Welle 8 befestigt. Dazu sind der Schneidkörper 4 und das Laufrad 2 mittig zu ihrer Drehachse mit einer Bohrung 9 versehen, die sich in die Stirnseite der Welle 8 fortsetzt. In die Bohrung 9 wird ein Befestigungselement 10 eingeführt. Bei dem Befestigungselement 10 handelt es sich um eine Schraube, die in ein Gewinde greift, das die Bohrung 9 im Bereich der Welle 8 aufweist.The cutting body 4 is fixed to the end face of a
Der Schneidkörper 4 ist drehfest mit dem Laufrad 2 und der Welle 8 verbunden. Die Welle 8 wird von einem Motor 11 angetrieben. Dabei handelt es sich um einen Elektromotor, der einen Stator 12 und einen Rotor 13 umfasst. Der Motor 11 wird von einem Motorgehäuse 14 umgeben. Das Laufrad 2 ist von einem Gehäuse 15 umgeben. Die Schaufeln 16 des Laufrades 2 sind an einer Deckscheibe 17 angeformt. Durch den Druckstutzen 18 verlässt das Medium die Kreiselpumpe. Die zur Montage erforderliche Teilung des Motorgehäuses 14 vom Gehäuse 15 ist aus Gründen der Übersichtlichkeit nicht dargestellt.The cutting body 4 is rotatably connected to the impeller 2 and the
Das Laufrad 2 und der Schneidkörper 4 werden gemeinsam von dem Motor 11 in Rotation versetzt. Der Schneidkörper 4 wird mit einer Kraft F gegen die Schneidfläche 3 gepresst.The impeller 2 and the cutting body 4 are rotated together by the
Erfindungsgemäß ist dem Motor 11 eine Steuereinrichtung zugeordnet, welche das Laufrad 2 und den Schneidkörper 4 intervallweise in entgegen gesetzten Rotationsrichtungen umlaufen lässt. Vorzugsweise sind die Zeitintervalle für jede Drehrichtung gleich lang.According to the invention, a control device is associated with the
Bei jeder Drehrichtung werden jeweils die ablaufenden Schneidkanten der Messer 7 und der Schneidfläche 3 geschärft, während die auflaufenden Kanten verschleißen. Ab einem bestimmten Verschleißgrad wird die Drehrichtung gewechselt, so dass sich die zuvor verschlissenen Kanten wieder schärfen.In each direction of rotation, respectively the running cutting edges of the
Der Schneidkörper 4 umfasst vier Flügel 19, welche die Öffnungen 5, der Schneidfläche 3 überstreifen. Die Flügel 19 sind an einem zylindrischen Grundkörper 20 angeformt und erstrecken sich ausgehend von der Drehachse geradlinig in rein radialer Richtung nach außen. Jeder Flügel 19 weist an seiner der Schneidfläche 3 zugewandten Seite ein Messer 7 auf. Die Messer 7 des Schneidkörpers 4 liegen unmittelbar an der Schneidfläche 3 an.The cutting body 4 comprises four
Der Schneidkörper 4 ist über ein Befestigungsmittel 10 an der Stirnseite der Welle 8 befestigt. Im Ausführungsbeispiel wird eine Schraube als Befestigungsmittel 10 eingesetzt.The cutting body 4 is fastened via a fastening means 10 on the end face of the
Durch die Zuflussöffnung 22 tritt das Medium in das Laufrad 2 ein, strömt an den Schaufeln 16 vorbei und verlässt die Kreiselpumpe durch den Druckstutzen 18. Das Laufrad 3 ist mit Hilfe eines Befestigungsmittels 10 an der Stirnseite der Welle 8 befestigt.Through the
Das Laufrad 2 ist von einem Gehäuse 15 umgeben, das erfindungsgemäß als Ringgehäuse ausgebildet ist, so dass das Laufrad 2 in beiden Drehrichtungen die gleiche Fördercharakteristik aufweist. Der Strömungsraum 23 zwischen Laufrad 2 und Gehäuse 15 ist spiegelsymmetrisch zur Druckstutzenachse 21 ausgebildet.The impeller 2 is surrounded by a
Der Saugdeckel 6 weist eine Aussparung auf, in die sich die als kreisförmige Schneidplatte ausgebildete Schneidfläche 3 bündig einfügt. Durch die Öffnungen 5 der Schneidplatte 3 wird das Medium angesaugt. Bei der Rotation überstreifen die Flügel 19 des Schneidkörpers 4 die Öffnungen 5.The
Das Laufrad 2 weist Schaufeln 16 auf, die sich geradlinig in rein radialer Richtung nach außen erstrecken. Die Schaufeln 16 sind als quaderförmige Erhebungen an der Deckscheibe 17 des Laufrades 2 angeformt.The impeller 2 has
Das Laufrad 2 und der Schneidkörper 4 sind bei der in
Bei der in
Claims (9)
dadurch gekennzeichnet, dass
dem Motor (11) eine Steuereinrichtung zugeordnet ist, welche das Laufrad (2) und den Schneidkörper (4) intervallweise in unterschiedlichen Rotationsrichtungen umlaufen lässt, wobei sich die Schaufeln (16) des Laufrades (2) in rein radialer Richtung erstrecken, so dass die Kreiselpumpe in beiden Rotationsrichtungen die gleiche Kennlinie aufweist.Centrifugal pump assembly with a cutting unit (1), which is arranged before the medium flows into an impeller (2), wherein the cutting unit (1) has a cutting surface (3) with openings (5) through which the medium flows and a rotating cutting body (4 ) abutting the cutting surface (3), the cutting body (4) and the impeller (2) being rotated together by a motor (11),
characterized in that
the motor (11) is associated with a control device which rotates the impeller (2) and the cutting body (4) at intervals in different directions of rotation, wherein the blades (16) of the impeller (2) extend in a purely radial direction, so that the Centrifugal pump has the same characteristic in both directions of rotation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011077545A DE102011077545A1 (en) | 2011-06-15 | 2011-06-15 | Centrifugal pump with integrated cutting unit |
Publications (2)
Publication Number | Publication Date |
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EP2535590A2 true EP2535590A2 (en) | 2012-12-19 |
EP2535590A3 EP2535590A3 (en) | 2018-03-21 |
Family
ID=46168177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12168834.5A Withdrawn EP2535590A3 (en) | 2011-06-15 | 2012-05-22 | Circulation pump with integrated cutting assembly |
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EP (1) | EP2535590A3 (en) |
CN (1) | CN102889248A (en) |
DE (1) | DE102011077545A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104533844B (en) * | 2014-12-25 | 2017-12-01 | 东营国安化工有限公司 | The dredge pump and medium separation method of a kind of sewage pump medium separation hood and its composition |
CN106907327B (en) * | 2017-04-26 | 2019-06-25 | 佛山市肯富来工业泵有限公司 | The method of dredge pump anti-block system and control unit the control cutting part of pumping plant |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE2313403A1 (en) | 1972-03-20 | 1973-10-04 | Tec Group | AXIAL FLOW MACHINE |
DE2536555A1 (en) | 1974-08-23 | 1976-03-04 | Peabody Barnes | PUMPING DEVICE WITH CRUSHER |
DE19643729A1 (en) | 1996-10-23 | 1998-04-30 | Sebastian Zunhammer | Delivery of inhomogeneous fluids, especially manure |
DE202009003995U1 (en) | 2009-03-25 | 2010-08-19 | Hugo Vogelsang Maschinenbau Gmbh | cutter |
Family Cites Families (15)
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US2714354A (en) * | 1952-09-08 | 1955-08-02 | Orrin E Farrand | Pump |
US3973866A (en) * | 1975-01-02 | 1976-08-10 | Vaughan Co., Inc. | Centrifugal chopping slurry pump |
NL163703C (en) * | 1975-09-29 | 1980-10-15 | Kamps De Wild B V | Apparatus for processing liquid manure, in particular slurry. |
SU715826A1 (en) * | 1978-07-31 | 1980-02-15 | Центральный Научно-Исследовательский Институт Механизации И Электрификации Сельского Хозяйства Нечерноземной Зоны Ссср | Centrifugal pump |
GB2081382B (en) * | 1980-07-18 | 1984-04-18 | Neu Eng Etd | Fans provided with cutting knives |
US4842479A (en) * | 1981-01-29 | 1989-06-27 | Vaughan Co., Inc. | High head centrifugal slicing slurry pump |
US5044566A (en) * | 1989-12-27 | 1991-09-03 | General Signal Corporation | Sewage pump with self-adjusting cutters |
DE9207883U1 (en) * | 1992-04-03 | 1992-08-06 | Sihi Gmbh & Co Kg, 2210 Itzehoe, De | |
DK0911527T3 (en) * | 1997-10-25 | 2001-06-11 | Oranienburger Pumpen Verdichte | Pump with a cutting device |
DE29910596U1 (en) * | 1999-06-17 | 1999-09-09 | Hugo Vogelsang Maschinenbau Gm | Device for crushing solids in inhomogeneous liquids |
DE202005011680U1 (en) * | 2005-07-26 | 2005-12-15 | Herberg, Friedrich, Dr.-Ing. | Centrifugal pump, has rotor arranged eccentrically in housing, and separator placed coaxial to rotor, where revolutions per minute of separator is different from revolutions per minute of rotor |
CN2929263Y (en) * | 2006-06-08 | 2007-08-01 | 上海连成(集团)有限公司 | Waste water pump with cutting and reverse flushing double function |
CN201255138Y (en) * | 2008-05-27 | 2009-06-10 | 深圳市兴日生实业有限公司 | Centrifugation water pump impeller assembly collocated with impeller blade |
US8562287B2 (en) * | 2009-06-23 | 2013-10-22 | Zoeller Pump Company, Llc | Grinder pump |
CN201763664U (en) * | 2010-08-24 | 2011-03-16 | 开利泵业(集团)有限公司 | Cutting device for submersible sewage pump |
-
2011
- 2011-06-15 DE DE102011077545A patent/DE102011077545A1/en not_active Withdrawn
-
2012
- 2012-05-22 EP EP12168834.5A patent/EP2535590A3/en not_active Withdrawn
- 2012-06-15 CN CN2012101979903A patent/CN102889248A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2313403A1 (en) | 1972-03-20 | 1973-10-04 | Tec Group | AXIAL FLOW MACHINE |
DE2536555A1 (en) | 1974-08-23 | 1976-03-04 | Peabody Barnes | PUMPING DEVICE WITH CRUSHER |
DE19643729A1 (en) | 1996-10-23 | 1998-04-30 | Sebastian Zunhammer | Delivery of inhomogeneous fluids, especially manure |
DE202009003995U1 (en) | 2009-03-25 | 2010-08-19 | Hugo Vogelsang Maschinenbau Gmbh | cutter |
Also Published As
Publication number | Publication date |
---|---|
CN102889248A (en) | 2013-01-23 |
DE102011077545A1 (en) | 2012-12-20 |
EP2535590A3 (en) | 2018-03-21 |
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