EP2348220A1 - Immersion pump - Google Patents
Immersion pump Download PDFInfo
- Publication number
- EP2348220A1 EP2348220A1 EP09016147A EP09016147A EP2348220A1 EP 2348220 A1 EP2348220 A1 EP 2348220A1 EP 09016147 A EP09016147 A EP 09016147A EP 09016147 A EP09016147 A EP 09016147A EP 2348220 A1 EP2348220 A1 EP 2348220A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- sealing ring
- recess
- pump housing
- submersible pump
- 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.)
- Granted
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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
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
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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
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
- F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
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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
- 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
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
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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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/60—Fluid transfer
- F05B2260/602—Drainage
- F05B2260/603—Drainage of leakage having past a seal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/60—Fluid transfer
- F05B2260/63—Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles
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- 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
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/607—Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles
Definitions
- the invention relates to a submersible pump.
- submersible pumps for pumping off solids mixed with wastewater. These pumps are usually equipped with a single-channel or a multi-channel impeller for conveying the waste water. Such a submersible pump is for example off EP 1 300 594 B1 known.
- the pump described therein has on the input side of its impeller in the region of the suction mouth a cutting device which comminutes the solids contained in the wastewater to be pumped in order to prevent blocking of the pump impeller.
- the sewage pumping proves to be unproblematic with this pump, but also the crushed solid components as well as sucked by the pump air can penetrate into the comparatively large cavity of the impeller and thus lead to vibrations and resulting flow noise.
- the invention has the object to provide an improved pump of the above type, are at least reduced in the impeller vibrations and associated noise and preferably prevented and in which the pump housing sealing shaft seal is protected from particulate located in the impeller ,
- the submersible pump according to the invention has an impeller arranged in a pump housing, in particular a single-channel impeller with a cavity in the interior.
- the impeller may have all the usual impeller types impeller shapes.
- the submersible pump is equipped with a seal that seals the impeller against a fixed part of the pump housing. In particular, this seal prevents ingress of solids and contaminants into at least one cavity located in the interior of the impeller, outside a flow channel.
- This seal has a wheel arranged on the side sealing ring, which engages in a pump housing side arranged second outer sealing ring.
- the impeller-side sealing ring is firmly connected to the impeller and consequently rotates with the rotating impeller.
- the pump housing side arranged sealing ring is rotatably fixed in the pump housing.
- the two sealing rings used form a radial seal, which is preferably arranged in the region of the outer circumference of the impeller and the impeller, and in particular its cavities with respect to the liquid-flow-through interior of the pump housing seals.
- the invention is based on the idea that in the impeller interior, i. In a cavity of the impeller located particulate matter or accumulating there air through the seal in a Beeich outside the impeller to dissipate.
- the pump housing-side sealing ring according to the invention at least one recess for the removal of solid particles.
- only one recess is preferably formed on this sealing ring, if necessary, this sealing ring can also have a plurality of recesses.
- the gap located between the impeller side and the substantially adjacent pump housing side sealing ring is expediently dimensioned and / or designed such that solid particles can penetrate into this gap and then on the pump housing side arranged outer sealing ring formed recess can escape from the seal in the adjoining liquid-flowed cavity of the pump housing.
- the gap on a design and dimensioning which on the one hand allows to dissipate air through the gap from the impeller interior, on the other hand, however, can prevent the penetration of solids into the cavity of the impeller.
- both the impeller-side and the pump housing side arranged sealing ring may have a hollow cylindrical shape.
- sealing rings with a sleeve shape can be used as sealing rings.
- the pump-housing-side seal ring overlap the attached to the impeller seal on the outside or circumferentially in the axial direction in a relatively large area, which can be realized according to good sealing properties. That a sealing ring, preferably the pump housing side sealing ring surrounds the other sealing ring circumferentially.
- a driver formed on the outer or peripheral side of the impeller-side sealing ring or a plurality of entrainment members provided there for transporting solid particles may be formed by a relief-like surface structure formed on the outer circumferential surface of this sealing ring.
- the impeller-side sealing ring has at least one recess on its outer circumference.
- a plurality of depressions are formed uniformly distributed around the circumference of the sealing ring.
- a recess 28 is formed, on which the otherwise surrounded by the sealing ring 26 impeller-side sealing ring 24 is exposed.
- the recess 28 is arranged in its angular position with respect to the longitudinal axis A in a spaced from the pressure port 18 low-pressure region of the outlet manifold 16 ( Fig. 6 ) and extends from an end face of the sealing ring 26 facing the impeller 8 in the direction of the component 20, wherein the width of the recess 28 tapers trapezoidally in the direction of the component 20.
- the adjacent to the end face of the sealing ring 26 and opposite side edges 30 and 32 of the recess 28 are each beveled with respect to the end face of the sealing ring 28.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Tauchpumpe.The invention relates to a submersible pump.
Es ist üblich, Tauchpumpen zum Abpumpen von mit Feststoffen versetzten Abwässern einzusetzen. Diese Pumpen sind in der Regel mit einem Einkanal- oder einem Mehrkanallaufrad zum Fördern des Abwassers ausgestattet. Eine solche Tauchpumpe ist beispielsweise aus
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine verbesserte Pumpe der oben genannten Art zu schaffen, bei der Laufradschwingungen und eine damit verbundene Geräuschentwicklung zumindest verringert und vorzugsweise verhindert werden und bei der die das Pumpengehäuse abdichtende Wellendichtung vor in dem Laufrad befindlichen Feststoffteilchen geschützt wird.Against this background, the invention has the object to provide an improved pump of the above type, are at least reduced in the impeller vibrations and associated noise and preferably prevented and in which the pump housing sealing shaft seal is protected from particulate located in the impeller ,
Gelöst wird diese Aufgabe durch eine Tauchpumpe mit den in Anspruch 1 angegebenen Merkmalen. Vorteilhafte Weiterbildungen dieser Tauchpumpe ergeben sich aus den Unteransprüchen, der nachfolgenden Beschreibung sowie der Zeichnung. Hierbei können gemäß der Erfindung die in den Unteransprüchen angegebenen Merkmale jeweils für sich aber auch in Kombination die erfindungsgemäße Lösung gemäß Anspruch 1 weiter ausgestalten.This object is achieved by a submersible pump having the features specified in claim 1. Advantageous developments of this submersible pump will become apparent from the dependent claims, the following description and the drawings. Here, according to the invention, the features specified in the dependent claims in each case but also in combination, the inventive solution according to claim 1 further develop.
Die erfindungsgemäße Tauchpumpe weist ein in einem Pumpengehäuse angeordnetes Laufrad, insbesondere ein Einkanallaufrad mit einem Hohlraum im Innern auf. Das Laufrad kann jedoch alle bei Tauchpumpen üblichen Laufradformen aufweisen. Die Tauchpumpe ist mit einer Dichtung ausgestattet, die das Laufrad gegenüber einem feststehenden Teil des Pumpengehäuses abdichtet. Diese Dichtung verhindert insbesondere ein Eindringen von Feststoffen und Verunreinigungen in zumindest einen im Innern des Laufrads, außerhalb eines Strömungskanal gelegenen Hohlraums. Diese Dichtung weist einen laufradseitig angeordneten Dichtring auf, der in einen pumpengehäuseseitig angeordneten zweiten äußeren Dichtring eingreift. Der laufradseitige Dichtring ist fest mit dem Laufrad verbunden und rotiert demzufolge mit dem sich drehenden Laufrad mit. Der pumpengehäuseseitig angeordnete Dichtring ist drehfest in dem Pumpengehäuse festgelegt. Zusammen bilden die beiden verwendeten Dichtringe eine Radialdichtung, die bevorzugt im Bereich des Außenumfangs des Laufrads angeordnet ist und das Laufrad, und insbesondere dessen Hohlräume gegenüber dem flüssigkeitsdurchströmten Innenraum des Pumpengehäuses abdichtet.The submersible pump according to the invention has an impeller arranged in a pump housing, in particular a single-channel impeller with a cavity in the interior. However, the impeller may have all the usual impeller types impeller shapes. The submersible pump is equipped with a seal that seals the impeller against a fixed part of the pump housing. In particular, this seal prevents ingress of solids and contaminants into at least one cavity located in the interior of the impeller, outside a flow channel. This seal has a wheel arranged on the side sealing ring, which engages in a pump housing side arranged second outer sealing ring. The impeller-side sealing ring is firmly connected to the impeller and consequently rotates with the rotating impeller. The pump housing side arranged sealing ring is rotatably fixed in the pump housing. Together, the two sealing rings used form a radial seal, which is preferably arranged in the region of the outer circumference of the impeller and the impeller, and in particular its cavities with respect to the liquid-flow-through interior of the pump housing seals.
Der Erfindung liegt die Idee zugrunde, in dem Laufradinneren, d.h. in einem Hohlraum des Laufrads befindliche Feststoffteilchen oder sich dort ansammelnde Luft über die Dichtung in einen Beeich außerhalb des Laufrads abzuführen. Zu diesem Zweck weist der pumpengehäuseseitige Dichtring erfindungsgemäß mindestens eine Ausnehmung zur Abfuhr von Feststoffteilchen auf. Um die grundsätzlichen Dichtungseigenschaften der Dichtung möglichst wenig zu beeinflussen, ist an diesem Dichtring bevorzugt lediglich eine Ausnehmung ausgebildet, ggf. kann dieser Dichtring aber auch mehrere Ausnehmungen aufweisen. Um die Feststoffteilchen über die Dichtung in einen Bereich außerhalb des Laufrads leiten zu können, ist der zwischen dem laufradseitig angeordneten Dichtring und dem im Wesentlichen daran anliegenden pumpengehäuseseitigen Dichtring befindliche Spalt zweckmäßigerweise derart dimensioniert und/oder ausgestaltet, dass Feststoffteilchen in diesen Spalt eindringen können und dann an dem pumpengehäuseseitig angeordneten äußeren Dichtring ausgebildeten Ausnehmung aus der Dichtung in den daran angrenzenden flüssigkeitsdurchströmten Hohlraum des Pumpengehäuses austreten können. Weiter vorteilhaft weist der Spalt eine Ausgestaltung und Dimensionierung auf, die es einerseits erlaubt, Luft über den Spalt aus dem Laufradinneren abzuführen, andererseits aber ein Eindringen von Feststoffen in den Hohlraum des Laufrades verhindern kann.The invention is based on the idea that in the impeller interior, i. In a cavity of the impeller located particulate matter or accumulating there air through the seal in a Beeich outside the impeller to dissipate. For this purpose, the pump housing-side sealing ring according to the invention at least one recess for the removal of solid particles. In order to influence the basic sealing properties of the seal as little as possible, only one recess is preferably formed on this sealing ring, if necessary, this sealing ring can also have a plurality of recesses. In order to be able to guide the solid particles via the seal into a region outside the impeller, the gap located between the impeller side and the substantially adjacent pump housing side sealing ring is expediently dimensioned and / or designed such that solid particles can penetrate into this gap and then on the pump housing side arranged outer sealing ring formed recess can escape from the seal in the adjoining liquid-flowed cavity of the pump housing. Further advantageously, the gap on a design and dimensioning, which on the one hand allows to dissipate air through the gap from the impeller interior, on the other hand, however, can prevent the penetration of solids into the cavity of the impeller.
Indem im Laufradinneren, d.h. sich in einem Hohlraum befindliche Feststoffteilchen und Luft über die Dichtung aus dem Laufrad in einen das Laufrad umgebenden Pumpengehäuseabschnitt geschafft werden, können sie nicht mehr die Laufruhe des Laufrads beeinflussen. Des Weiteren wird durch die Reduzierung des Feststoffanteils in der Flüssigkeit die Gefahr verringert, dass Feststoffteilchen in eine üblicherweise zur flüssigkeitsdichten Durchführung der Antriebswelle des Laufrads in das Pumpengehäuse vorgesehene Wellendichtung eindringen können.By in the impeller interior, ie located in a cavity located particulate matter and air through the seal from the impeller in a surrounding the impeller pump housing section are created, they can no longer affect the smoothness of the impeller. Furthermore, the reduction of the solids content in the liquid reduces the risk that solid particles in a usually for liquid-tight implementation of the drive shaft of the impeller can penetrate into the pump housing provided shaft seal.
Um die in dem Spalt zwischen dem laufradseitigen Dichtring und dem pumpengehäuseseitigen Dichtring befindlichen Feststoffteilchen durch die Dichtung und in diesem Zusammenhang besonders vorteilhaft zu der an dem äußeren Dichtring ausgebildeten Ausnehmung leiten zu können, weist der laufradseitige Dichtring an seiner Außenseite zumindest einen Mitnehmer zum Transport von Feststoffteilchen auf. Solche Mitnehmer können beispielsweise über eine reliefartige Topografie der äußeren Umfangsfläche des laufradseitigen Dichtrings erzeugt werden, bei der Vorsprünge und/oder Vertiefungen in dem Dichtungsspalt befindliche Feststoffteilchen bei der Rotation des laufradseitigen Dichtrings mitnehmen und zu der an dem pumpengehäuseseitigen Dichtring ausgebildeten Ausnehmung bewegen, wo sie an die Umgebung der Dichtung abgegeben werden.In order to be able to guide the solid particles located in the gap between the impeller-side sealing ring and the pump-housing-side sealing ring through the seal and in this connection to the recess formed on the outer sealing ring, the impeller-side sealing ring has on its outer side at least one driver for transporting solid particles on. Such drivers can be generated for example via a relief-like topography of the outer peripheral surface of the impeller-side sealing ring, take in the projections and / or depressions in the sealing gap befindliches solid particles in the rotation of the impeller-side sealing ring and move to the recess formed on the pump housing side sealing ring, where they the environment of the seal are delivered.
Bei der erfindungsgemäßen Tauchpumpe handelt es sich bevorzugt um eine vertikal aufgestellte Pumpe, bei der der Ansaugbereich im Bereich eines unteren Endes der Pumpe unterhalb eines vertikal gelagerten Laufrads angeordnet ist. Bei diesen Pumpen kann sich in einem oberen Laufradbereich insbesondere in einem Hohlraum des Laufrads ggf. von der Tauchpumpe mitangesaugte Luft sammeln. Insofern erweist es sich als zweckmäßig, die das Laufrad gegenüber einem feststehenden Teil des Pumpengehäuses abdichtende Dichtung genau in diesem oberen Bereich des Laufrads anzuordnen, damit die in dem Laufrad befindliche Luft über die Dichtung direkt aus dem Laufrad entweichen kann. So sieht eine vorteilhafte Weiterbildung der erfindungsgemäßen Tauchpumpe vor, die das Laufrad bzw. dessen Hohlraum gegenüber einem feststehenden Teil des Pumpengehäuses abdichtende Dichtung an einem axial von dem Saugmund der Pumpe beabstandeten Ende des Laufrads anzuordnen.The submersible pump according to the invention is preferably a vertically mounted pump, in which the intake region is arranged in the region of a lower end of the pump below a vertically mounted impeller. With these pumps, air which has been sucked in by the submersible pump may possibly collect in an upper impeller region, in particular in a cavity of the impeller. In this respect, it proves useful to arrange the impeller sealing against a fixed part of the pump housing seal exactly in this upper region of the impeller, so that the air in the impeller can escape through the seal directly from the impeller. Thus, an advantageous development of the submersible pump according to the invention, which arrange the impeller or its cavity relative to a fixed part of the pump housing sealing seal on an axially spaced from the suction mouth of the pump end of the impeller.
Gemäß einer weiteren vorteilhaften Weiterbildung kann sowohl der laufradseitige als auch der pumpengehäuseseitig angeordnete Dichtring eine hohlzylindrische Form aufweisen. Demzufolge können als Dichtringe jeweils Dichtringe mit einer Hülsenform verwendet werden. Hierbei kann der pumpengehäuseseitige Dichtungsring den an dem Laufrad angebrachten Dichtring an deren Außenseite bzw. umfangseitig in axialer Richtung in einem vergleichsweise großen Bereich überlappen, wodurch sich entsprechend gute Dichtungseigenschaften verwirklichen lassen. D.h. der eine Dichtring , vorzugsweise der pumpengehäuseseitige Dichtring umgibt den anderen Dichtring umfänglich.According to a further advantageous development, both the impeller-side and the pump housing side arranged sealing ring may have a hollow cylindrical shape. As a result, sealing rings with a sleeve shape can be used as sealing rings. Here, the pump-housing-side seal ring overlap the attached to the impeller seal on the outside or circumferentially in the axial direction in a relatively large area, which can be realized according to good sealing properties. That a sealing ring, preferably the pump housing side sealing ring surrounds the other sealing ring circumferentially.
Wie bereits angemerkt worden ist, können ein an der Außen- bzw. Umfangseite des laufradseitigen Dichtrings ausgebildeter Mitnehmer oder mehrere dort vorgesehene Mitnehmer zum Transport von Feststoffteilchen von einer an der äußeren Mantelfläche dieses Dichtrings ausgebildeten reliefartigen Oberflächenstruktur gebildet werden. In diesem Zusammenhang ist bevorzugt vorgesehen, dass der laufradseitige Dichtring an seinem Außenumfang mindestens eine Vertiefung aufweist. Besonders vorteilhaft sind mehrere Vertiefungen gleichmäßig um den Umfang des Dichtrings verteilt ausgebildet. Die Verwendung von muldenförmigen Vertiefungen zum Transport von Feststoffteilchen ist in sofern vorteilhaft, als diese Ausgestaltung der Mitnehmer keinen Einfluss auf die übrige Spaltbreite zwischen dem laufradseitigen Dichtring und dem pumpengehäuseseitigen Dichtring hat, da an dem laufradseitigen Dichtring keine radial nach außen ragenden Erhöhungen benötigt werden. Demzufolge kann der Spalt im übrigen schmal dimensioniert werden.As has already been noted, a driver formed on the outer or peripheral side of the impeller-side sealing ring or a plurality of entrainment members provided there for transporting solid particles may be formed by a relief-like surface structure formed on the outer circumferential surface of this sealing ring. In this context, it is preferably provided that the impeller-side sealing ring has at least one recess on its outer circumference. Particularly advantageously, a plurality of depressions are formed uniformly distributed around the circumference of the sealing ring. The use of trough-shaped depressions for transporting solid particles is advantageous in so far as this embodiment of the driver has no effect on the remaining gap width between the impeller-side sealing ring and the pump-housing-side sealing ring, since no radially outwardly projecting elevations are required on the impeller-side sealing ring. As a result, the gap can otherwise be made narrow.
Die an dem laufradseitigen Dichtring ausgebildeten Vertiefungen dienen zur Aufnahme der Feststoffteilchen. Um diese Feststoffteilchen aus der Dichtung heraustransportieren zu können, erweist es sich als besonders zweckmäßig, wenn die an dem pumpengehäuseseitigen Dichtring ausgebildete Ausnehmung derart angeordnet und ausgebildet ist, dass sie die zumindest eine Vertiefung der laufradseitigen Dichtrings vollständig freigibt. D.h., wenn sich die Vertiefung des laufradseitigen Dichtringes an derselben Winkelposition wie die Ausnehmung befindet, liegen Ausnehmung und Vertiefung übereinander. Dementsprechend ist eine Ausgestaltung vorgesehen, bei der durch Drehung des laufradseitigen Dichtrings relativ zu dem pumpengehäuseseitigen Dichtring die an dem laufradseitigen Dichtring ausgebildete Vertiefung bzw. Vertiefungen in eine Stellung bewegt werden, in der sie aufgrund der an dem pumpengehäuseseitigen Dichtring ausgebildeten Ausnehmung nicht von diesem Dichtring abgedeckt werden. In einer Vertiefung befindliche Feststoffteilchen können dann an dieser Stelle aus der Vertiefung in das Pumpengehäuse herausfallen.The recesses formed on the impeller-side sealing ring serve to receive the solid particles. To make these solid particles out To be able to transport out of the seal, it proves to be particularly useful if the recess formed on the pump-housing-side sealing ring is arranged and formed so that it completely releases the at least one recess of the impeller-side sealing ring. That is, when the recess of the impeller-side sealing ring is located at the same angular position as the recess, recess and recess lie one above the other. Accordingly, an embodiment is provided in which, by rotation of the impeller side sealing ring relative to the pump housing side sealing ring formed on the impeller side sealing recess or depressions are moved to a position in which they are not covered by this seal due to the recess formed on the pump housing side sealing ring become. Solid particles located in a depression can then fall out of the depression into the pump housing at this point.
Zum Abtransport der Feststoffteilchen aus dem Pumpengehäuse ist die an dem pumpengehäuseseitigen Dichtring ausgebildete Ausnehmung zweckmäßigerweise in einem flüssigkeitsdurchströmten Bereich des Pumpengehäuses angeordnet, der mit dem Druckstutzen der Pumpe strömungsverbunden ist. Hierbei ist bevorzugt vorgesehen, dass die Ausnehmung an einem Abschnitt des Dichtrings angeordnet ist, der einem Niederdruckbereich des Pumpengehäuses zugewandt ist. In diesem Zusammenhang ist unter einem Niederdruckbereich des Pumpengehäuses ein solcher flüssigkeitsdurchströmter Bereich im Auslaufkrümmer des Pumpengehäuses zu verstehen, in dem ein geringerer Flüssigkeitsdruck als an dem Druckstutzen, d.h. dem Austrittsquerschnitt der Pumpe vorliegt.For removal of the solid particles from the pump housing, the recess formed on the pump-housing-side sealing ring is expediently arranged in a region of the pump housing through which fluid flows, which is flow-connected to the pressure connection of the pump. Here, it is preferably provided that the recess is arranged on a portion of the sealing ring, which faces a low-pressure region of the pump housing. In this context, a low-pressure region of the pump housing means such a fluid-flow area in the outlet manifold of the pump housing in which a lower fluid pressure than at the pressure port, i. the outlet cross-section of the pump is present.
Die an dem pumpengehäuseseitigen Dichtring ausgebildete Ausnehmung ist bevorzugt an einem axialen Außenrand des Dichtrings ausgebildet. Typischerweise handelt es sich bei diesem Außenrand des Dichtrings um den Rand, der dem Laufrad der Pumpe zugewandt angeordnet ist. Die Ausnehmung ist also vorzugsweise in dem Bereich des pumpengehäuseseitigen Dichtrings angeordnet, der am weitesten von dem freien Ende des darin eingreifenden laufradseitigen Dichtrings entfernt ist.The recess formed on the pump-housing-side sealing ring is preferably formed on an axial outer edge of the sealing ring. Typically, this outer edge of the sealing ring around the edge, which faces the impeller of the pump. The recess is therefore preferably arranged in the region of the pump-housing-side sealing ring which is the farthest away from the free end of the wheel-side sealing ring engaging therein.
Besonders vorteilhaft kann ein die Ausnehmung begrenzender Rand zumindest abschnittsweise eine Schneide bilden. D.h., zumindest ein Randabschnitt weist beispielsweise durch einen entsprechenden Anschliff eine solche sich verjüngende Geometrie auf, die diesem Randabschnitt eine gewisse Schärfe verleiht. Dieser geschärfte Randbereich dient dazu, die durch die Dichtung zu der Ausnehmung des pumpengehäuseseitigen Dichtrings transportierten Feststoffteilchen vor der Freigabe in das Pumpengehäuse zu zerkleinern.Particularly advantageously, an edge delimiting the recess can form a cutting edge at least in sections. In other words, at least one edge section has such a tapering geometry, for example, by a corresponding bevel, which gives this edge section a certain sharpness. This sharpened edge region serves to shred the transported through the seal to the recess of the pump housing side sealing ring solid particles before release into the pump housing.
Zweckmäßigerweise ist die an dem die Ausnehmung begrenzenden Rand ausgebildete Schneide an einem der Drehrichtung des Laufrads zugewandten Randabschnitt der Ausnehmung ausgebildet. Dies ist in sofern sinnvoll, als bei der Drehung des Laufrads die von dem an diesem Laufrad befestigten Dichtring transportierten Feststoffteilchen direkt zu der Schneide, d.h. deren Schneidkante in Schneidrichtung hin bewegt werden.Conveniently, the cutting edge formed on the edge defining the recess is formed on an edge portion of the recess facing the direction of rotation of the running wheel. This makes sense insofar as, as the impeller rotates, the particulate matter carried by the seal ring attached to that impeller goes directly to the cutting edge, i. whose cutting edge are moved in the cutting direction.
Bevorzugt ist der die Schneide bildende Abschnitt bezogen auf die äu-βere Stirnseite des Dichtrings in einem Winkel von 15 - 90° ausgerichtet. Besonders vorteilhaft ist der Winkel, den die Schneide mit der äußeren Stirnseite des pumpengehäuseseitigen Dichtrings bildet, größer als 35°, da sich gezeigt hat, dass bei kleineren Winkeln die Gefahr besteht, dass sich zu der Schneide geführte Feststoffteilchen an der Schneide ablagern können, ohne wie gewünscht geschnitten zu werden.Preferably, the section forming the cutting edge is oriented at an angle of 15-90 ° relative to the outer side of the sealing ring. Particularly advantageously, the angle formed by the cutting edge with the outer end face of the pump housing-side sealing ring, greater than 35 °, since it has been shown that at smaller angles there is a risk that can be deposited on the cutting edge of solid particles on the cutting edge, without to be cut as desired.
Auch ein der Schneide gegenüberliegend angeordneter Randabschnitt der Ausnehmung kann bezogen auf die äußere Stirnseite des Dichtrings abgeschrägt sein, so dass die Ausnehmung eine im Wesentlichen keil oder trapezförmige Außenkontur aufweisen kann. Hierbei kann der der Schneide gegenüberliegend angeordnete Randabschnitt bezogen auf die äußere Stirnseite des Dichtrings vorteilhaft ebenfalls in einem Winkel von 15 - 90° ausgerichtet sein, wobei allerdings vorzugsweise vorgesehen ist, dass dieser Winkel größer als der Winkel zwischen der Schneide und der äußeren Stirnseite des Dichtrings ist.An edge portion of the recess arranged opposite the cutting edge can also be chamfered with respect to the outer end face of the sealing ring, so that the recess can have a substantially wedge-shaped or trapezoidal outer contour. Here, the cutting edge of the oppositely arranged edge portion relative to the outer end side of the sealing ring advantageously also be aligned at an angle of 15-90 °, although it is preferably provided that this angle is greater than the angle between the cutting edge and the outer end face of the sealing ring is.
Nachfolgend ist die Erfindung anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. In den Zeichnungen zeigt:
- Fig. 1
- eine Tauchpumpe in einer Seitenansicht,
- Fig. 2
- ein Pumpengehäuse der Tauchpumpe nach
Fig. 1 in perspektivischer Darstellung, - Fig. 3 ein
- Laufrad der Tauchpumpe nach
Fig.1 in einer Seitenansicht, - Fig.
- 4 das Laufrad nach
Fig. 3 mit einem daran angeordneten pumpengehäuseseitigen Dichtring in perspektivischer Darstellung, - Fig. 5 in
- einem Längsschnitt einen Abschnitt des Pumpengehäuses nach
Fig. 2 und - Fig. 6
- schematisch in einem Querschnitt das Pumpengehäuse nach
Fig. 2 .
- Fig. 1
- a submersible pump in a side view,
- Fig. 2
- a pump housing of the submersible pump
Fig. 1 in perspective, - Fig. 3 a
- Impeller of the submersible pump
Fig.1 in a side view, - FIG.
- 4 the impeller after
Fig. 3 with a pump housing-side sealing ring arranged thereon in perspective view, - Fig. 5 in
- a longitudinal section of a section of the pump housing after
Fig. 2 and - Fig. 6
- schematically in a cross section of the pump housing after
Fig. 2 ,
Bei der in
In dem Pumpengehäuse 2 ist ein Laufrad 8 in einer Drehrichtung B um eine Längsachse A des Pumpengehäuses 2 drehbar gelagert (
Das Laufrad 8 ist in dem Pumpengehäuse 2 gegenüber einem dort feststehenden Bauteil 20 mittels einer Dichtung 22 abgedichtet. Die Dichtung 22 wird von einem an dem Laufrad 8 ausgebildeten Dichtring 24 und von einem an dem Bauteil 20 ausgebildeten Dichtring 26 gebildet, wobei der laufradseitige Dichtring 24 in den an dem Bauteil 20 ausgebildeten Dichtring 26 eingreift. Der Dichtring 24 ist an dem von dem Saugmund 12 abgewandten stirnseitigen Ende des Laufrads 8 angeordnet, während der Dichtring 26 an dem Bauteil 20 des Pumpengehäuses an einer dem Laufrad 8 zugewandten Seite angeordnet ist. Beide Dichtringe 24 und 26 sind im Wesentlichen hohlzylindrisch ausgebildet, welche konzentrisch zueinander angeordnet sind.The
An dem Dichtring 26 ist eine Ausnehmung 28 ausgebildet, an der der ansonsten von dem Dichtring 26 umhüllte laufradseitige Dichtring 24 freiliegt. Die Ausnehmung 28 ist in ihrer Winkellage bezüglich der Längsachse A in einem von dem von dem Druckstutzen 18 beabstandeten Niederdruckbereich des Auslaufkrümmer 16 angeordnet (
An der äußeren Umfangsfläche des laufradseitigen Dichtrings 24 sind ausgehend von dem stirnseitigen Ende des Dichtrings 24 vier muldenförmige Vertiefungen 34 ausgebildet. Diese Vertiefungen 34 sind gleichmäßig voneinander beabstandet über den Umfang des Dichtrings 24 verteilt. Die Vertiefungen 34 dienen zusammen mit der an dem Dichtring 26 ausgebildeten Ausnehmung 28 dazu, ggf. in der Aushöhlung 14 des Laufrades 8 befindliche Feststoffteilchen, die ansonsten zu unerwünschten Laufradvibrationen und damit verbundenen Geräuschen führen würden, über die Dichtung 22 in den Auslaufkrümmer 16 abzuführen. Hierbei sind die Vertiefungen 34 zur Aufnahme dieser Feststoffteilchen vorgesehen. Des Weiteren dienen die Vertiefungen 34 zum Transport der Feststoffteilchen zu der Ausnehmung 28 des Dichtrings 26, wo die Vertiefungen 34 nicht mehr von dem Dichtring 26 überdeckt sind, so dass in den Vertiefungen 34 befindliche Feststoffteilchen in den an die Ausnehmung 28 angrenzenden Niederdruckbereich des Auslaufkrümmer 16 abgelassen werden können. Durch die Laufraddrehung werden aus den Vertiefungen 34 im Bereich der Ausnehmung 28 herausragende Feststoffteilchen, beispielsweise Feststofffasern gegen die Schneide 30 gedrückt und auf diese Weise zerkleinert.On the outer peripheral surface of the impeller-
- 22
- - Pumpengehäuse- Pump housing
- 44
- - Motorgehäuse- Motor housing
- 66
- - Standfuß- Stand
- 88th
- - Laufrad- Wheel
- 1010
- - Kanal- Channel
- 1212
- - Saugmund- Suction mouth
- 1414
- - Aushöhlung- Excavation
- 1616
- - Auslaufkrümmer- outlet manifold
- 1818
- - Druckstutzen- discharge nozzle
- 2020
- - Bauteil- component
- 2222
- - Dichtung- Poetry
- 2424
- - Dichtring- sealing ring
- 2626
- - Dichtring- sealing ring
- 2828
- - Ausnehmung- recess
- 3030
- - Seitenrand, Schneide- margin, cutting edge
- 3232
- - Seitenrand- margin
- 3434
- - Vertiefung- Deepening
- AA
- - Längsachse- longitudinal axis
- BB
- - Drehrichtung- direction of rotation
Claims (11)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09016147.2A EP2348220B1 (en) | 2009-12-30 | 2009-12-30 | Immersion pump |
PCT/EP2010/007100 WO2011079892A1 (en) | 2009-12-30 | 2010-11-23 | Submersible pump |
RU2012132482/06A RU2534193C2 (en) | 2009-12-30 | 2010-11-23 | Downhole pump |
US13/519,983 US9234523B2 (en) | 2009-12-30 | 2010-11-23 | Submersible pump |
CN201080060111.1A CN102686886B (en) | 2009-12-30 | 2010-11-23 | Submersible pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09016147.2A EP2348220B1 (en) | 2009-12-30 | 2009-12-30 | Immersion pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2348220A1 true EP2348220A1 (en) | 2011-07-27 |
EP2348220B1 EP2348220B1 (en) | 2015-07-08 |
Family
ID=42097339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09016147.2A Active EP2348220B1 (en) | 2009-12-30 | 2009-12-30 | Immersion pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US9234523B2 (en) |
EP (1) | EP2348220B1 (en) |
CN (1) | CN102686886B (en) |
RU (1) | RU2534193C2 (en) |
WO (1) | WO2011079892A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013050031A1 (en) * | 2011-10-07 | 2013-04-11 | Wuerdig Uwe | Centrifugal pump for fluids containing solid materials, and gap seal |
CN105378288A (en) * | 2011-10-06 | 2016-03-02 | 赛乐姆知识产权控股有限责任公司 | Pump for pumping liquid comprising solid matter |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2660473B1 (en) * | 2012-05-04 | 2016-11-23 | Grundfos Holding A/S | Waste water pump |
EP3309404B1 (en) * | 2016-10-14 | 2022-03-02 | Grundfos Holding A/S | Waste water pump |
USD946627S1 (en) * | 2020-07-09 | 2022-03-22 | Forcome (Qingdao) Co., Ltd. | Electrical water pump |
CN113803265A (en) * | 2021-09-02 | 2021-12-17 | 安徽凯特泵业有限公司 | Long-shaft submerged pump with good stability |
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EP0538212A1 (en) * | 1991-09-03 | 1993-04-21 | ITT Flygt Aktiebolag | Pump impeller |
GB2310252A (en) * | 1996-02-16 | 1997-08-20 | United Utilities Plc | Machines with rotors; accumulation prevention |
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WO2005038260A1 (en) * | 2003-10-20 | 2005-04-28 | Itt Manufacturing Enterprises Inc. | Centrifugal pump |
WO2005050024A1 (en) * | 2003-11-17 | 2005-06-02 | Giw Industries, Inc. | Multiple diverter for reducing wear in a slurry pump |
EP1300594B1 (en) | 2001-09-10 | 2009-10-21 | Grundfos a/s | Centrifugal slurry pump |
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FI49345C (en) * | 1972-05-15 | 1975-05-12 | Ahlstroem Oy | Device for preventing clogging of the sealing gap, especially in a sewage pump or the like. |
DE2344576A1 (en) * | 1973-09-04 | 1975-03-13 | Neratoom | Centrifugal pump for abrasive suspensions - has sealing gaps formed by cooperating faces of impeller and housing, thus giving minimized wear |
US3881840A (en) * | 1973-09-05 | 1975-05-06 | Neratoom | Centrifugal pump for processing liquids containing abrasive constituents, more particularly, a sand pump or a waste-water pumper |
SU1149057A1 (en) * | 1983-05-31 | 1985-04-07 | Ленинградский Институт Водного Транспорта | Suction dredge |
SE530785C2 (en) * | 2006-01-23 | 2008-09-09 | Itt Mfg Enterprises Inc | Pump for pumping contaminated liquid containing solids |
-
2009
- 2009-12-30 EP EP09016147.2A patent/EP2348220B1/en active Active
-
2010
- 2010-11-23 WO PCT/EP2010/007100 patent/WO2011079892A1/en active Application Filing
- 2010-11-23 CN CN201080060111.1A patent/CN102686886B/en active Active
- 2010-11-23 RU RU2012132482/06A patent/RU2534193C2/en active
- 2010-11-23 US US13/519,983 patent/US9234523B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0538212A1 (en) * | 1991-09-03 | 1993-04-21 | ITT Flygt Aktiebolag | Pump impeller |
US5984629A (en) * | 1993-09-25 | 1999-11-16 | Ksb Aktiengesellscaft | Turbo-machine with reduced abrasive wear |
GB2310252A (en) * | 1996-02-16 | 1997-08-20 | United Utilities Plc | Machines with rotors; accumulation prevention |
EP1300594B1 (en) | 2001-09-10 | 2009-10-21 | Grundfos a/s | Centrifugal slurry pump |
WO2005038260A1 (en) * | 2003-10-20 | 2005-04-28 | Itt Manufacturing Enterprises Inc. | Centrifugal pump |
WO2005050024A1 (en) * | 2003-11-17 | 2005-06-02 | Giw Industries, Inc. | Multiple diverter for reducing wear in a slurry pump |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105378288A (en) * | 2011-10-06 | 2016-03-02 | 赛乐姆知识产权控股有限责任公司 | Pump for pumping liquid comprising solid matter |
CN105378288B (en) * | 2011-10-06 | 2018-02-06 | 赛乐姆知识产权控股有限责任公司 | For pumping the pump of the liquid comprising solid matter |
WO2013050031A1 (en) * | 2011-10-07 | 2013-04-11 | Wuerdig Uwe | Centrifugal pump for fluids containing solid materials, and gap seal |
CN103857917A (en) * | 2011-10-07 | 2014-06-11 | 乌韦·维迪希 | Centrifugal pump for fluids containing solid materials, and gap seal |
Also Published As
Publication number | Publication date |
---|---|
CN102686886B (en) | 2016-03-23 |
CN102686886A (en) | 2012-09-19 |
US20130089420A1 (en) | 2013-04-11 |
EP2348220B1 (en) | 2015-07-08 |
RU2534193C2 (en) | 2014-11-27 |
WO2011079892A1 (en) | 2011-07-07 |
US9234523B2 (en) | 2016-01-12 |
RU2012132482A (en) | 2014-02-10 |
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