EP2405142B1 - Centrifugal pump rotor component - Google Patents

Centrifugal pump rotor component Download PDF

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Publication number
EP2405142B1
EP2405142B1 EP11170301.3A EP11170301A EP2405142B1 EP 2405142 B1 EP2405142 B1 EP 2405142B1 EP 11170301 A EP11170301 A EP 11170301A EP 2405142 B1 EP2405142 B1 EP 2405142B1
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EP
European Patent Office
Prior art keywords
split ring
centrifugal pump
impeller
pump component
component according
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EP11170301.3A
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German (de)
French (fr)
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EP2405142A3 (en
EP2405142A2 (en
Inventor
Franz Bosbach
Dr. Hans Graf
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KSB AG
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KSB AG
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Priority to RS20161154A priority Critical patent/RS55488B1/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077—Safety measures
    • 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
    • F04D29/086—Sealings 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the invention relates to a centrifugal pump component, comprising at least one built-in part and a split ring, and a method for its production.
  • split rings and their configuration are known in many variations in the literature. These are usually manufactured as individual components and then installed in a pump housing or an impeller, so a built-in part. Between the split ring and its counter component always a hydraulic gap is formed. As a result, the achievable minimum gap is limited in rigid, one-piece constructions, as always manufacturing tolerances are taken into account.
  • the EP 2 148 096 A1 shows a multi-part arrangement for a split ring, which is arranged on the impeller of the pump and seals to an opposite sleeve-shaped portion.
  • the disadvantage here is that the elaborate seal can be destroyed during assembly.
  • a flexible lip of the gap seal applies during operation by the pressure difference to be sealed against the counterpart component. This leads to an increased power consumption and wear, which precludes the efforts for efficiency improvements.
  • individual parts must be attached to the impeller and housing, which means extra effort.
  • the DE 191 53 95 U shows the rigid one-piece construction of a split ring, which additionally provides a transport lock between the impeller and split ring.
  • One in operation dissolvable ring in the gap prevents jamming or seizing.
  • As a cardboard ring it lies directly in the hydraulic gap and increases with its thickness the minimum gap distance. The cardboard ring must also be inserted and thus another assembly step is necessary.
  • the EP 0 005 159 A1 shows a mechanical seal in which individual parts are connected for assembly, transport and storage to a unit.
  • the GB 543 404 A shows the breaking of a seal during assembly in a centrifugal pump, wherein a temporal effect is used here.
  • the object of the invention is to provide a centrifugal pump component comprising an internals, in particular an impeller, and a split ring arranged thereon, whereby a gap seal on the impeller of a centrifugal pump is to be made possible, which is inexpensive to manufacture and easy to assemble.
  • the solution provides that an auxiliary connection element is provided on the centrifugal pump component between the impeller and the split ring or within the split ring, wherein the auxiliary connection element is designed as a predetermined breaking point.
  • the advantage here is that the centrifugal pump component of split ring and impeller is manufacturable as a one-piece part. This centrifugal pump component is either made directly from a single blank or the split ring is connected to the impeller. This simplifies handling during assembly in the mating component, which accommodates the centrifugal pump component of split ring and impeller. If the centrifugal pump component is mounted in the opposite component, the split ring can be released from the impeller by breaking the predetermined breaking point.
  • the predetermined breaking point breaks when shear forces are applied in one direction.
  • the predetermined breaking point is dimensioned so that the centrifugal pump component is easy to install in the counterpart component, wherein the auxiliary connecting element firmly connects the impeller and the split ring. After installation, it is possible for additional load, in particular in a direction of force flow other than the installation direction, form after loosening a minimum gap between the impeller and the spade ring, while the counterpart component and the split ring are firmly and tightly interconnected.
  • a particularly advantageous design of the predetermined breaking point is when it breaks open in the direction of rotation of the pump and locks in the axial direction. It is irrelevant whether the resulting gap is radial, axial or diagonal type and whether control devices hide in the geometries.
  • the impeller of a first material, in particular of metal, plastic or ceramic. Since the impeller may be subjected to very harsh conditions in its later function, for example as impeller in a centrifugal pump, it is important to select the material suitable for the application. In addition to the media resistance, mass of the component and manufacturability also play an essential role in the selection.
  • the split ring is made of a second material, in particular of metal, plastic or ceramic.
  • the applications of the centrifugal pump require a careful selection of the material pairing between split ring and impeller.
  • the split ring according to the invention is interpretable so that it is provided as a wear part in the gap between the impeller and the housing.
  • auxiliary connection element of a third material, in particular of metal, plastic or ceramic. This allows any selection of the materials for the split ring and the impeller, wherein for the auxiliary connection element, a further material can be selected, which allows breaking of the predetermined breaking point at the desired shear force.
  • a labyrinth seal is formed between the impeller and the split ring.
  • the arrangement of split ring and impeller in a centrifugal pump component allows the formation of a high-precision sealing device in the form of a labyrinth seal. By connecting the two parts to the centrifugal pump component the distance and the arrangement are fixed so that no further adjustment effort is required when installing in the counterpart component.
  • split ring structures of self-assurance can be provided during operation, in particular thread in the direction of rotation of the impeller.
  • the connection between the split rings and the counterpart component of the pump itself is secured, in particular, the split ring has a corresponding to the rotation of the pump thread, so that it screwed solid when tarnishing occurring tangential load of the gap.
  • centrifugal pump component as an injection molded part allows, in addition to the simple production of the split ring and the impeller, a film gate of the Hitfstheticselements with the predetermined breaking point.
  • the centrifugal pump component can be designed as a multi-component injection-molded part, in particular when using different materials for impeller and split ring.
  • interlocking labyrinth systems can also be produced, with generative processes being particularly suitable for the production.
  • the predetermined breaking point in this case is the boundary layer between the two components which adhere to one another after production. The adhesion is much lower than the strength of the two components and the load during operation of the pump.
  • the invention further comprises a method for mounting an impeller with split ring arranged thereon in a centrifugal pump, in which a one-piece part of impeller and split ring is joined in the first step in the counter component, wherein the split ring between the impeller and the counterpart component is arranged in one another step, the split ring is broken at the predetermined breaking point of the one-piece part.
  • connection of the split ring with the housing takes place in a form-fitting manner, in particular by thread, plug-in or snap-in connections. This allows easy and precise installation.
  • the connection can be made reversible, whereby a later replacement of the centrifugal pump component is made possible.
  • connection of the split ring with the housing takes place cohesively, in particular by gluing, welding or the like.
  • the advantage here is that the installation is very easy to carry out. By material connection can be made very robust connections.
  • connection of the split ring to the housing is non-positively, in particular by fits, shrinking or similar methods.
  • a secure connection of the centrifugal Pumpenbaüteils is made possible with the mating component.
  • FIG. 1 shows a built-in part in the form of an impeller 1.
  • This can be used in a Strömungsarbeits- or -kraftmaschine use.
  • one or two split rings 2 may be provided to delimit the pressure areas.
  • each a suction and pressure side split ring 2 for sealing a pump pressure chamber to not shown here, located in the housing mating surfaces.
  • These split rings 2 are each connected by an auxiliary connecting element 3 with the impeller 1.
  • the auxiliary connecting element 3 has a predetermined breaking point, which in FIG. 1 not shown. After installation of the insert in the housing, the split rings are firmly in the housing. The impeller is not rotatable in this state. By breaking the predetermined breaking point impeller 1 and split ring 2 is separated from each other and a smallest possible, narrow hydraulic gap is formed between the components. Any roughness of the predetermined breaking point is easily removed.
  • FIG. 2 shows in an enlarged section of the FIG. 1 , the arrangement of the split ring 2 and the auxiliary connection element 3 in relation to the impeller 1.
  • three components can consist of three different materials. The choice of materials depends on the requirements of the centrifugal pump and the solubility of the predetermined breaking point. Breaking can be done by a defined axial load or torque.

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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 Kreiselpumpenbauteil, umfassend mindestens ein Einbauteil und einen Spaltring, sowie ein Verfahren zu dessen Herstellung.The invention relates to a centrifugal pump component, comprising at least one built-in part and a split ring, and a method for its production.

Spaltringe und deren Konfiguration sind in vielen Varianten in der Literatur bekannt. Diese werden zumeist als einzelne Bauteile gefertigt und anschließend in ein Pumpengehäuse oder einem Laufrad, also einem Einbauteil, eingebaut. Zwischen dem Spaltring und seinem Gegenbauteil wird dabei stets ein hydraulischer Spalt gebildet. Hierdurch ist der erreichbare Minimalspalt bei starren, einteiligen Konstruktionen begrenzt, da stets Fertigungstoleranzen zu berücksichtigen sind.Split rings and their configuration are known in many variations in the literature. These are usually manufactured as individual components and then installed in a pump housing or an impeller, so a built-in part. Between the split ring and its counter component always a hydraulic gap is formed. As a result, the achievable minimum gap is limited in rigid, one-piece constructions, as always manufacturing tolerances are taken into account.

Die EP 2 148 096 A1 zeigt eine mehrteilige Anordnung für einen Spaltring, der am Laufrad der Pumpe angeordnet ist und zu einem gegenüberliegenden hülsenförmigen Abschnitt abdichtet. Nachteilig ist hierbei, dass die aufwändige Dichtung bei der Montage zerstört werden kann. Eine flexible Lippe der Spaltdichtung legt sich im Betrieb durch den abzudichtenden Druckunterschied am Gegenbauteil an. Dies führt zu einer erhöhten Leistungsaufnahme und Verschleiß, was den Bestrebungen nach Wirkungsgradverbesserungen entgegensteht. Zudem müssen an Laufrad und Gehäuse einzelne Teile angebaut werden, was einen Mehraufwand bedeutet.The EP 2 148 096 A1 shows a multi-part arrangement for a split ring, which is arranged on the impeller of the pump and seals to an opposite sleeve-shaped portion. The disadvantage here is that the elaborate seal can be destroyed during assembly. A flexible lip of the gap seal applies during operation by the pressure difference to be sealed against the counterpart component. This leads to an increased power consumption and wear, which precludes the efforts for efficiency improvements. In addition, individual parts must be attached to the impeller and housing, which means extra effort.

Die DE 191 53 95 U zeigt die starre einteilige Konstruktion eines Spaltrings, die zusätzlich eine Transportsicherung zwischen Laufrad und Spaltring vorsieht. Ein im Betrieb auflösbarer Ring in dem Spalt verhindert ein Verkanten oder Fressen. Als Pappring liegt er jedoch direkt im hydraulischen Spalt und vergrößert mit seiner Dicke den minimalen Spaltabstand. Der Pappring ist zusätzlich einzulegen und damit ist ein weiterer Montageschritt nötig.The DE 191 53 95 U shows the rigid one-piece construction of a split ring, which additionally provides a transport lock between the impeller and split ring. One in operation dissolvable ring in the gap prevents jamming or seizing. As a cardboard ring, however, it lies directly in the hydraulic gap and increases with its thickness the minimum gap distance. The cardboard ring must also be inserted and thus another assembly step is necessary.

Die EP 0 005 159 A1 zeigt eine Gleitringdichtung, bei der einzelne Teile zur Montage, zum Transport und zur Lagerung zu einer Einheit verbunden sind.The EP 0 005 159 A1 shows a mechanical seal in which individual parts are connected for assembly, transport and storage to a unit.

Die GB 543 404 A zeigt das Aufbrechen einer Dichtung während der Montage bei einer Kreiselpumpe, wobei hier ein zeitlicher Effekt genutzt wird.The GB 543 404 A shows the breaking of a seal during assembly in a centrifugal pump, wherein a temporal effect is used here.

Aufgabe der Erfindung ist es, eine Kreiselpumpenbauteil umfassend ein Einbauten, insbesondere-ein Laufrad, und einen daran angeordneten Spaltring zu schaffeh, wodurch eine Spaltabdichtung am Laufrad einer Kreiselpumpe ermöglicht sein soll, die günstig in der Herstellung und einfach zu montieren ist.The object of the invention is to provide a centrifugal pump component comprising an internals, in particular an impeller, and a split ring arranged thereon, whereby a gap seal on the impeller of a centrifugal pump is to be made possible, which is inexpensive to manufacture and easy to assemble.

Die Lösung sieht vor, dass an dem Kreiselpumpenbauteil zwischen dem Laufrad und dem Spaltring oder innerhalb des Spaltringes ein Hilfsverbindungselement vorgesehen ist, wobei das Hilfsverbindungselement als eine Sollbruchstelle ausgebildet ist. Von Vorteil ist dabei, dass das Kreiselpumpenbauteil aus Spaltring und Laufrad als einstückiges Teil fertigbar ist. Dieses Kreiselpumpenbauteil wird entweder direkt aus einem einzigen Rohteil hergestellt oder der Spaltring wird mit dem Laufrad verbunden. Dies vereinfacht die Handhabung bei der Montage in das Gegenbauteil, das das Kreiselpumpenbauteil aus Spaltring und Laufrad aufnimmt. Ist das Kreiselpumpenbauteil im Gegenbauteil montiert, so kann der Spaltring vom Laufrad gelöst werden, indem die Sollbruchstelle gebrochen wird.The solution provides that an auxiliary connection element is provided on the centrifugal pump component between the impeller and the split ring or within the split ring, wherein the auxiliary connection element is designed as a predetermined breaking point. The advantage here is that the centrifugal pump component of split ring and impeller is manufacturable as a one-piece part. This centrifugal pump component is either made directly from a single blank or the split ring is connected to the impeller. This simplifies handling during assembly in the mating component, which accommodates the centrifugal pump component of split ring and impeller. If the centrifugal pump component is mounted in the opposite component, the split ring can be released from the impeller by breaking the predetermined breaking point.

In einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass die Sollbruchstelle beim Anliegen von Scherkräften in einer Richtung bricht. Die Sollbruchstelle ist dermaßen dimensioniert, dass das Kreiselpumpenbauteil einfach in das Gegenbauteil einbaubar ist, wobei das Hilfsverbindungselement das Laufrad und den Spaltring fest verbindet. Nach erfolgtem Einbau ist es möglich, bei zusätzlicher Belastung, insbesondere bei einer anderen Kraftflussrichtung als der Einbaürichtung, nach dem Lösen einen Minimalspalt zwischen Laufrad und Spattring auszubilden, während das Gegenbauteil und der Spaltring fest und dicht miteinander verbunden sind. Eine besonders vorteilhafte Gestaltung der Sollbruchstelle ist es, wenn diese in Richtung der Rotation der Pumpe aufbricht und in axialer Richtung sperrt. Dabei ist es unerheblich, ob der entstehende Spalt radialer, axialer oder diagonaler Art ist und ob sich Regeleinrichtungen in den Geometrien verbergen.In a further embodiment of the invention, it is provided that the predetermined breaking point breaks when shear forces are applied in one direction. The predetermined breaking point is dimensioned so that the centrifugal pump component is easy to install in the counterpart component, wherein the auxiliary connecting element firmly connects the impeller and the split ring. After installation, it is possible for additional load, in particular in a direction of force flow other than the installation direction, form after loosening a minimum gap between the impeller and the spade ring, while the counterpart component and the split ring are firmly and tightly interconnected. A particularly advantageous design of the predetermined breaking point is when it breaks open in the direction of rotation of the pump and locks in the axial direction. It is irrelevant whether the resulting gap is radial, axial or diagonal type and whether control devices hide in the geometries.

Des Weiteren besteht die Möglichkeit, das Laufrad aus einem ersten Material zu fertigen, insbesondere aus Metall, Kunststoff oder Keramik. Da das Laufrad in seiner späteren Funktion, beispielsweise als Laufrad in einer Kreiselpumpe, unter Umständen sehr rauen Bedingungen ausgesetzt ist, ist es wichtig, den zur Anwendung passenden Werkstoff auszuwählen. Neben der Medienbeständigkeit spielen auch Masse des Bauteils und Herstellbarkeit eine wesentliche Rolle bei der Auswahl.Furthermore, it is possible to manufacture the impeller of a first material, in particular of metal, plastic or ceramic. Since the impeller may be subjected to very harsh conditions in its later function, for example as impeller in a centrifugal pump, it is important to select the material suitable for the application. In addition to the media resistance, mass of the component and manufacturability also play an essential role in the selection.

In einer weiteren Ausführungsform ist der Spaltring aus einem zweiten Material gefertigt, insbesondere aus Metall, Kunststoff oder Keramik. Die Anwendungen der Kreiselpumpe erfordern eine sorgfältige Auswahl der Materialpaarung zwischen Spaltring und Laufrad. Der Spaltring ist erfindungsgemäß so auslegbar, dass er als Schleißteil im Spalt zwischen Laufrad und Gehäuse vorgesehen ist.In a further embodiment, the split ring is made of a second material, in particular of metal, plastic or ceramic. The applications of the centrifugal pump require a careful selection of the material pairing between split ring and impeller. The split ring according to the invention is interpretable so that it is provided as a wear part in the gap between the impeller and the housing.

Es besteht die Möglichkeit das Hilfsverbindungselement aus einem dritten Material zu fertigen, insbesondere aus Metall, Kunststoff oder Keramik. Dies ermöglicht eine beliebige Auswahl der Materialien für den Spaltring und das Laufrad wobei für das Hilfsverbindungselement ein weiteres Material gewählt werden kann, das ein Brechen der Sollbruchstelle bei der gewünschten Scherkraft ermöglicht.It is possible to make the auxiliary connection element of a third material, in particular of metal, plastic or ceramic. This allows any selection of the materials for the split ring and the impeller, wherein for the auxiliary connection element, a further material can be selected, which allows breaking of the predetermined breaking point at the desired shear force.

In einer weiteren Ausführungsform ist zwischen dem Laufrad und dem Spaltring eine Labyrinthdichtung ausgebildet. Die Anordnung von Spaltring und Laufrad in einem Kreiselpumpenbauteil ermöglicht die Ausbildung einer hochpräzisen Dichtvorrichtung in Form einer Labyrinthdichtung. Durch die Verbindung der beiden Teile zum Kreiselpumpenbauteil sind der Abstand und die Anordnung festgelegt, sodass beim Einbau in das Gegenbauteil kein weiterer Einstellaufwand nötig ist.In a further embodiment, a labyrinth seal is formed between the impeller and the split ring. The arrangement of split ring and impeller in a centrifugal pump component allows the formation of a high-precision sealing device in the form of a labyrinth seal. By connecting the two parts to the centrifugal pump component the distance and the arrangement are fixed so that no further adjustment effort is required when installing in the counterpart component.

An dem Spaltring können Strukturen der Selbstsicherung im Betrieb vorgesehen sein, insbesondere Gewinde in Richtung der Umdrehung des Laufrades. Hierdurch wird die Verbindung zwischen Spaltringe und Gegenbauteil der Pumpe selbst gesichert, insbesondere weist der Spaltring ein der Drehung der Pumpe entsprechendes Gewinde auf, so dass er sich bei auftretende tangentialer Belastung des Spaltes durch Anlaufen fester einschraubt.On the split ring structures of self-assurance can be provided during operation, in particular thread in the direction of rotation of the impeller. In this way, the connection between the split rings and the counterpart component of the pump itself is secured, in particular, the split ring has a corresponding to the rotation of the pump thread, so that it screwed solid when tarnishing occurring tangential load of the gap.

Eine Ausführung des Kreiselpumpenbauteils als Spritzgussteil ermöglicht neben der einfachen Herstellung des Spaltringes und des Laufrad einen Filmanguss des Hitfsverbindungselements mit der Sollbruchstelle.An embodiment of the centrifugal pump component as an injection molded part allows, in addition to the simple production of the split ring and the impeller, a film gate of the Hitfsverbindungselements with the predetermined breaking point.

Außerdem kann das Kreiselpumpenbauteil als Mehrkomponentenspritzgussteil ausgeführt sein, insbesondere bei Verwendung unterschiedlicher Materialien für Laufrad und Spaltring. Durch Inkompatibilitäten der eingesetzten Werkstoffe lassen sich somit auch ineinandergreifende Labyrinthsysteme herstellen, wobei sich zur Herstellung generative Verfahren besonders eignen. Die Sollbruchstelle ist in diesem Fall die Grenzschicht zwischen den beiden Komponenten, die nach der Fertigung gegeneinander haften. Die Haftung ist weitaus geringer, als die Festigkeit der beiden Komponenten und die Belastung beim Betrieb der Pumpe.In addition, the centrifugal pump component can be designed as a multi-component injection-molded part, in particular when using different materials for impeller and split ring. As a result of incompatibilities of the materials used, interlocking labyrinth systems can also be produced, with generative processes being particularly suitable for the production. The predetermined breaking point in this case is the boundary layer between the two components which adhere to one another after production. The adhesion is much lower than the strength of the two components and the load during operation of the pump.

Die Erfindung umfasst weiterhin ein Verfahren zum Montieren eines Laufrad mit daran angeordnetem Spaltring in eine Kreiselpumpe, bei dem ein einstückiges Teil aus Laufrad und Spaltring im ersten Schritt in das Gegenbauteil gefügt wird, wobei der Spaltring zwischen dem Laufrad und dem Gegenbauteil angeordnet wird, in einem weiteren Schritt wird der Spaltring an der Sollbruchstelle vom einstückigen Teil gebrochen. Von Vorteil ist dabei, dass beim Fügen des Kreiselpumpenbauteils in das Gegenbauteil keine weiteren Einstellarbeiten zwischen Laufrad und Spaltring mehr nötig sind. Beim Zusammenbau der Kreiselpumpe ist nur ein Teil passgenau zu montieren. Nach dem Brechen der Sollbruchstelle sind Laufrad und Spaltring optimal eingestellt.The invention further comprises a method for mounting an impeller with split ring arranged thereon in a centrifugal pump, in which a one-piece part of impeller and split ring is joined in the first step in the counter component, wherein the split ring between the impeller and the counterpart component is arranged in one another step, the split ring is broken at the predetermined breaking point of the one-piece part. The advantage here is that when joining the centrifugal pump component in the mating component no further adjustments between the impeller and split ring are more necessary. When assembling the centrifugal pump, only one part has to be mounted accurately. After breaking the predetermined breaking point, impeller and split ring are optimally adjusted.

In einer weiteren Ausgestaltung des Verfahrens erfolgt die Verbindung des Spaltrings mit dem Gehäuse formschlüssig, insbesondere durch Gewinde, Steck- oder Schnappverbindungen. Dies ermöglicht eine einfache und präzise Montage. Die Verbindung kann reversibel ausgeführt sein, wodurch ein späterer Austausch des Kreiselpumpenbauteils ermöglicht ist.In a further embodiment of the method, the connection of the split ring with the housing takes place in a form-fitting manner, in particular by thread, plug-in or snap-in connections. This allows easy and precise installation. The connection can be made reversible, whereby a later replacement of the centrifugal pump component is made possible.

In einer weiteren Ausgestaltung des Verfahrens erfolgt die Verbindung des Spaltrings mit dem Gehäuse stoffschlüssig, insbesondere durch Kleben, Schweißen oder vergleichbares. Von Vorteil ist hierbei, dass die Montage sehr einfach durchführbar ist. Durch Stoffschluss lassen sich sehr robuste Verbindungen herstellen.In a further embodiment of the method, the connection of the split ring with the housing takes place cohesively, in particular by gluing, welding or the like. The advantage here is that the installation is very easy to carry out. By material connection can be made very robust connections.

In einer weiteren Ausgestaltung des Verfahrens erfolgt die Verbindung des Spaltrings mit dem Gehäuse kraftschlüssig, insbesondere durch Passungen, Aufschrumpfen oder vergleichbare Verfahren. Bei dieser Variante ist eine sichere Verbindung des Kreiselpumpenbaüteils mit dem Gegenbauteil ermöglicht.In a further embodiment of the method, the connection of the split ring to the housing is non-positively, in particular by fits, shrinking or similar methods. In this variant, a secure connection of the centrifugal Pumpenbaüteils is made possible with the mating component.

Weitere Ausführungsformen ergeben sich aus der Kombination der bisher dargestellten und sind deshalb hier nicht weiter ausgeführt.Further embodiments result from the combination of the previously shown and are therefore not further elaborated here.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher beschrieben. Es zeigen die

  • Figur 1 eine Montagevorbereitung und die
  • Figur 2 ein vergrößertes Detail daraus.
Embodiments of the invention are illustrated in the drawings and will be described in more detail below. It show the
  • FIG. 1 a mounting preparation and the
  • FIG. 2 an enlarged detail of it.

Die Figur 1 zeigt ein Einbauteil in Form eines Laufrades 1. Dieses kann in einer Strömungsarbeits- oder -kraftmaschine Verwendung finden. Bei einer Kreiselpumpe können ein oder zwei Spaltringe 2 zur Abgrenzung der Druckbereiche vorgesehen sein. Hier dienen je ein saug- und druckseitiger Spaltring 2 zur Abdichtung eines Pumpendruckraumes an hier nicht dargestellten, im Gehäuse befindlichen Gegenflächen. Diese Spaltringe 2 sind jeweils durch ein Hilfsverbindungselement 3 mit dem Laufrad 1 verbunden. Das Hilfsverbindungselement 3 weist eine Sollbruchstelle auf, die in Figur 1 nicht dargestellt ist. Nach erfolgter Montage des Einbauteils im Gehäuse liegen die Spaltringe fest im Gehäuse an. Das Laufrad ist in diesem Zustand nicht drehbar. Durch Aufbrechen der Sollbruchstelle wird Laufrad 1 und Spaltring 2 voneinander getrennt und ein kleinstmöglicher, enger hydraulischer Spalt wird zwischen den Bauteilen gebildet. Etwaige Rauhigkeiten der Sollbruchstelle schleifen sich problemlos ab.The FIG. 1 shows a built-in part in the form of an impeller 1. This can be used in a Strömungsarbeits- or -kraftmaschine use. In a centrifugal pump, one or two split rings 2 may be provided to delimit the pressure areas. Here are each a suction and pressure side split ring 2 for sealing a pump pressure chamber to not shown here, located in the housing mating surfaces. These split rings 2 are each connected by an auxiliary connecting element 3 with the impeller 1. The auxiliary connecting element 3 has a predetermined breaking point, which in FIG. 1 not shown. After installation of the insert in the housing, the split rings are firmly in the housing. The impeller is not rotatable in this state. By breaking the predetermined breaking point impeller 1 and split ring 2 is separated from each other and a smallest possible, narrow hydraulic gap is formed between the components. Any roughness of the predetermined breaking point is easily removed.

Die Figur 2 zeigt in einem vergrößerte Ausschnitt aus der Figur 1, die Anordnung des Spaltrings 2 und des Hilfsverbindungselements 3 in Relation zum Laufrad 1. In der Figur ist gezeigt, dass drei Komponenten aus drei unterschiedlichen Materialien bestehen können. Die Auswahl der Materialien hängt von den Anforderungen an die Kreiselpumpe und der Lösbarkeit der Sollbruchstelle ab. Das Aufbrechen kann durch eine definierte axiale Belastung oder ein Drehmoment erfolgen.The FIG. 2 shows in an enlarged section of the FIG. 1 , the arrangement of the split ring 2 and the auxiliary connection element 3 in relation to the impeller 1. In the figure it is shown that three components can consist of three different materials. The choice of materials depends on the requirements of the centrifugal pump and the solubility of the predetermined breaking point. Breaking can be done by a defined axial load or torque.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1.
LaufradWheel
2.Second
Spaltringsplit ring
3.Third
HilfsverbindungselementAuxiliary connecting element

Claims (13)

  1. Centrifugal pump component comprising an installation part, the installation part being an impeller (1) and a split ring (2) which is arranged thereon, a part of the split ring (2) being connected, during assembly of the pump, in a stationary manner to a corresponding component, in particular a casing, characterized in that an auxiliary connecting element (3) is provided between the impeller and the split ring (2) or within the split ring (2), the auxiliary connecting element (3) being configured as a predetermined break point.
  2. Centrifugal pump component according to Claim 1, characterized in that the predetermined break point fractures when shearing forces prevail in one direction.
  3. Centrifugal pump component according to Claim 1 or 2, characterized in that the impeller is manufactured from a first material, in particular from metal, plastic or ceramic.
  4. Centrifugal pump component according to Claim 3, characterized in that the split ring (2) is manufactured from a second material, in particular from metal, plastic or ceramic.
  5. Centrifugal pump component according to Claim 4, characterized in that the auxiliary connecting element (3) is manufactured from a third material, in particular from metal, plastic or ceramic.
  6. Centrifugal pump component according to one of Claims 1 to 5, characterized in that a labyrinth seal is configured between the impeller and the split ring (2).
  7. Centrifugal pump component according to one of Claims 1 to 6, characterized in that structures for self-locking during operation are provided on the split ring (2), in particular thread locks.
  8. Centrifugal pump component according to one of Claims 1 to 7, characterized in that the centrifugal pump component is configured as an injection moulded part.
  9. Centrifugal pump component according to one of Claims 1 to 8, characterized in that the centrifugal pump component is configured as a multiple-component injection moulded part, in particular if different materials are used for the impeller and the split ring (2) .
  10. Method for mounting an impeller with at least one split ring (2) which is arranged thereon into a centrifugal pump, characterized in that, in the first step, a single-piece part comprising an impeller and a split ring (2) is joined into the corresponding component, that is to say into the casing, and in that, in a further step, the split ring (2) is broken from the single-piece part at a predetermined break point.
  11. Method according to Claim 10, characterized in that the connection of the split ring (2) to the casing takes place in a positively locking manner, in particular by way of threads, plug-in or snap-action connections.
  12. Method according to Claim 10, characterized in that the connection of the split ring (2) to the casing takes place in an integrally joined manner, in particular by way of adhesive bonding, welding or something comparable.
  13. Method according to Claim 10, characterized in that the connection of the split ring (2) to the casing takes place in a non-positive manner, in particular by way of locating fits, shrink fits or something comparable.
EP11170301.3A 2010-07-08 2011-06-17 Centrifugal pump rotor component Active EP2405142B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RS20161154A RS55488B1 (en) 2010-07-08 2011-06-17 Centrifugal pump rotor component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010026450A DE102010026450B3 (en) 2010-07-08 2010-07-08 Centrifugal pump component

Publications (3)

Publication Number Publication Date
EP2405142A2 EP2405142A2 (en) 2012-01-11
EP2405142A3 EP2405142A3 (en) 2014-08-06
EP2405142B1 true EP2405142B1 (en) 2016-10-12

Family

ID=44588253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11170301.3A Active EP2405142B1 (en) 2010-07-08 2011-06-17 Centrifugal pump rotor component

Country Status (5)

Country Link
EP (1) EP2405142B1 (en)
DE (1) DE102010026450B3 (en)
DK (1) DK2405142T3 (en)
ES (1) ES2609758T3 (en)
RS (1) RS55488B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019053B (en) * 2014-06-25 2016-05-18 无锡杰尔压缩机有限公司 When high speed rotor start and stop, prevent the structure that sealing ring damages

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543404A (en) * 1940-09-19 1942-02-24 Wilfley & Sons Inc A Standpipe connection for pumps
DE1915395U (en) * 1965-02-27 1965-05-06 Klein Schanzlin & Becher Ag CENTRIFUGAL PUMP, IN PARTICULAR WITH VERTICAL SHAFT.
DE2211253C2 (en) * 1972-03-09 1974-03-28 Rheinstahl Ag, 4300 Essen Centrifugal pump divided in one axial plane
EP0005159B1 (en) * 1978-03-20 1981-07-08 Goetze Ag Slip-ring sealing
DE3524865A1 (en) * 1985-07-12 1987-01-15 Rheinische Braunkohlenw Ag Coupling sleeve for pipes
DE19960160B4 (en) * 1999-12-14 2014-09-11 Mahle International Gmbh Device for optimizing the gap width of centrifugal pumps
DE10300611B4 (en) * 2003-01-10 2012-03-29 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Merbelsrod bearing arrangement
DE102005030424A1 (en) * 2005-06-30 2007-01-04 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Arrangement and method for arranging a pump bearing in / on coolant pump housings made of plastic
EP2148096B1 (en) * 2008-07-25 2013-04-10 Grundfos Management A/S Centrifugal pump

Also Published As

Publication number Publication date
DE102010026450B3 (en) 2011-12-01
EP2405142A3 (en) 2014-08-06
ES2609758T3 (en) 2017-04-24
DK2405142T3 (en) 2017-01-23
RS55488B1 (en) 2017-04-28
EP2405142A2 (en) 2012-01-11

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