EP0618369A1 - Barrel-type pump - Google Patents

Barrel-type pump Download PDF

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Publication number
EP0618369A1
EP0618369A1 EP94103537A EP94103537A EP0618369A1 EP 0618369 A1 EP0618369 A1 EP 0618369A1 EP 94103537 A EP94103537 A EP 94103537A EP 94103537 A EP94103537 A EP 94103537A EP 0618369 A1 EP0618369 A1 EP 0618369A1
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EP
European Patent Office
Prior art keywords
insert
spiral
housing
centrifugal pump
diffuser
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
Application number
EP94103537A
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German (de)
French (fr)
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EP0618369B1 (en
Inventor
Alexander Nicklas
Jürgen Schill
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KSB AG
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KSB AG
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Publication of EP0618369A1 publication Critical patent/EP0618369A1/en
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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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps

Definitions

  • the invention relates to a centrifugal pump according to the preamble of the main claim.
  • Centrifugal pump types of this type also known as double-casing pumps, jacket casing pumps and / or so-called "barrel-type" pumps, are centrifugal pumps which are surrounded by a pot-like casing.
  • the pot equipped with suction and pressure nozzles, is firmly closed with a lid in a plane perpendicular to the shaft.
  • the drive shaft is passed through the cover and a shaft seal.
  • the advantage of this type of housing is that when the pump is dismantled, the pot housing can remain connected to the pipes and the foundation.
  • these are multi-stage pumps for use as high and ultra-high pressure pumps, in particular also as boiler feed pumps.
  • a forged housing can be used as a pot, which has the highest resistance to the pressures that occur. In order to operate this type of pump with the best possible efficiency, a very precise coordination of impellers and subordinate idlers is required for the respective application. This requires considerable design and manufacturing effort for each application.
  • the object of the invention is to develop a design for such pump housing types, with the aid of which easier adaptation to different systems is possible with improved efficiency.
  • An embodiment of the invention provides that the radially and / or axially developed spiral is part of a housing cover and / or the last stage housing.
  • a spiral shape has proven to be advantageous, which first develops in the radial direction and then in the axial direction. If larger rooms are available, other directions of development of the spiral are also possible. It is thus advantageously possible to dispense with an enlargement of the pot and the previously available annular space, in which the delivery medium emerging from the centrifugal pump is collected and fed to the pressure port, can be used for measures to improve efficiency.
  • the volume of the pump can be kept constant through the appropriate design of the lid closing the pot and its use as a performance-enhancing flow-guiding component.
  • a further embodiment provides that the spiral insert is arranged after the stator insert when viewed in the flow direction. This makes it possible to adapt only the idler wheel insert to a turned and / or wider impeller within a desired n q range of the impeller. Changes or adjustments to the spiral insert can thus be completely omitted. It is also possible that To design the guide wheel insert itself without blades and to provide it as a kind of ring diffuser, from which a transfer to the spiral insert takes place. This depends on the overall circumstances under which the pump is to be used.
  • another embodiment of the invention provides that it can be inserted into the pressure nozzle from the inside of the housing. So it is easily possible, for example with a protruding collar, to have the insert rest directly on the pot housing.
  • the diffuser-shaped insert can be made of a particularly resistant material in order to be able to withstand the high flow velocities in the area of the last pump stage.
  • the pot housing itself can then be produced from a material which is less expensive and, for reasons of wear resistance, is provided with a corresponding plating in the area of the liquid-carrying surfaces.
  • the spiral insert 1 shows a meridian section through the spiral insert 1 with a downstream diffuser insert 2, the stator insert not being shown for reasons of clarity.
  • the spiral 3 widens in the spiral insert 1 over approximately 100 ° to its maximum diameter D, in order to then experience a cross-sectional widening in the axial direction while the diameter remains the same.
  • the spiral insert In the area of the transition from the spiral insert 1 to the pressure nozzle insert 2, the spiral insert has a largest cross-sectional area. The spiral begins in the area of the stator outlet diameter D L.
  • the pressure port insert 2 has a diffuser-shaped extension 4 in its interior, which largely corresponds to the cross section of a pressure line to be connected in the area of the outlet 5.
  • the surface 6 of the diffuser insert 2 facing the spiral insert 1 is chamfered in the shape of a cylinder, in order to enable a good adaptation to the spiral insert 1.
  • a projecting collar 7 serves to hold the diffuser insert 2 within the pot housing, which is only indicated by hatching.
  • FIG. 2 a section according to II-II of FIG. 1, corresponds to a longitudinal section through a pot housing 8 in the area of the last stage. It can be seen here that a diffuser insert 2 is inserted into the pressure socket 9 from the inside of the pump into the pot housing 8. A last stage housing 10 inserted from the outside into the pot housing 8 holds the diffuser insert 2 in position. Between an end face 11 of the last stage housing 10 and a cover 12 which closes the pot housing 8, a guide wheel insert 13 is arranged, which is held in position by elements 14 preventing rotation. The last one shown here Impeller 15 is arranged on a shaft 16, which is held by a sealing and bearing housing 17 located within cover 12.
  • stator, stage housing and spiral inserts as well as impellers can be used to easily adapt the efficiency to the respective system conditions.
  • the spiral insert 1 which was designed here as an independent component, can also be an integral part of the cover 12 closing the pot housing 8. The same applies to the stator insert 13. It is also readily possible to transfer the function of the spiral insert and / or the stator insert 13 to the last stage housing part 10.
  • the free spiral cross section is marked here with 18.
  • the individual cross-sectional extensions of the spiral are shown in the representation of FIG. 3.
  • the area outlined with a thick line corresponds to a free spiral cross section 18 at a 360 ° wrap angle, i. H. at the spiral outlet.
  • the thin lines arranged within this area which are provided with degrees, represent the spiral cross section which is marked with identical degrees in FIG. 1.
  • the spiral In the range from approx. 100 ° spiral wrap angle, the spiral has a constant outer diameter.
  • the spiral cross section then only changes laterally in the axial direction and, if appropriate, also radially inwards.
  • FIG. 4 shows a section along line IV-IV of FIG. 1 through the last stage of the pump at a spiral angle of approximately 180 °.
  • the spiral cross section 18 of the spiral corresponds to that from FIG. 3 at 180 °.

Abstract

The invention relates to a barrel-type pump, arranged in which there are, in the vicinity of the last pump stage, for the purpose of increasing the efficiency, components which are designed as separate inserts in the form of a stator insert (13), a spiral insert (1) evolved radially and/or axially and a diffuser-like discharge port insert (2). <IMAGE>

Description

Die Erfindung betrifft eine Kreiselpumpe gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a centrifugal pump according to the preamble of the main claim.

Derartige Kreiselpumpenbauarten, auch als Doppelgehäusepumpen, Mantelgehäusepumpen und/oder Sogenannte "Barrel-Type"-Pumpen bekannt, sind Kreiselpumpen, die von einem topfähnlichen Gehäuse umgeben sind. Der mit saug- und Druckstutzen versehene Topf wird in einer senkrecht zur Welle liegenden Ebene mit einem Deckel fest verschlossen. Die Antriebswelle wird hierbei durch den Deckel sowie eine Wellenabdichtung hindurchgeführt. Der Vorteil dieser Gehäusebauart besteht darin, daß bei einer Demontage der Pumpe das Topfgehäuse mit den Rohrleitungen und dem Fundament verbunden bleiben kann. Gewöhnlich handelt es sich hierbei um mehrstufige Pumpen zur Verwendung als Hoch- und Höchstdruckpumpen, insbesondere auch als Kesselspeisepumpen Als Topf kann hierbei ein geschmiedetes Gehäuse Verwendung finden, welches gegenüber den auftretenden Drücken den höchsten Widerstand aufweist. Um diese Pumpenbauart mit bestmöglichem Wirkungsgrad zu betreiben, ist für den jeweiligen Einsatzzweck eine ganz genaue Abstimmung von Laufrädern und nachgeordneten Leiträdern erforderlich Dies bedingt für jeden Verwendungszweck einen erheblichen konstruktiven und fertigungstechnischen Aufwand.Centrifugal pump types of this type, also known as double-casing pumps, jacket casing pumps and / or so-called "barrel-type" pumps, are centrifugal pumps which are surrounded by a pot-like casing. The pot, equipped with suction and pressure nozzles, is firmly closed with a lid in a plane perpendicular to the shaft. The drive shaft is passed through the cover and a shaft seal. The advantage of this type of housing is that when the pump is dismantled, the pot housing can remain connected to the pipes and the foundation. Usually these are multi-stage pumps for use as high and ultra-high pressure pumps, in particular also as boiler feed pumps. A forged housing can be used as a pot, which has the highest resistance to the pressures that occur. In order to operate this type of pump with the best possible efficiency, a very precise coordination of impellers and subordinate idlers is required for the respective application. This requires considerable design and manufacturing effort for each application.

Der Erfindung liegt die Aufgabe zugrunde, für derartige Pumpengehäusebauarten eine Bauform zu entwickeln, mit deren Hilfe bei verbessertem Wirkungsgrad eine leichtere Anpassung an unterschiedliche Anlagen möglich ist.The object of the invention is to develop a design for such pump housing types, with the aid of which easier adaptation to different systems is possible with improved efficiency.

Die Lösung dieser Aufgabe erfolgt gemäß dem kennzeichnenden Teil des Hauptanspruches. Praktische Versuche haben gezeigt, daß mit dieser Bauform der Wirkungsgrad der letzten Pumpenstufe um 3 bis 4 % verbessert werden kann. Dies bedeutet selbst bei bis zu sechsstufigen Pumpenbauarten eine deutliche Verbesserung des Gesamtwirkungsgrades, so daß mit Hilfe der Energiekosteneinsparung eine schnellere Amortisation der Pumpe möglich wird. Die Ausbildung in Form von Einsätzen ermöglicht bei der Konstruktion der Pumpe durch eine Kombination verschiedener Einsätze in einfachster Weise eine leichte Anpassung an die jeweils bestehende Anlage.This object is achieved in accordance with the characterizing part of the main claim. Practical tests have shown that this type of construction can improve the efficiency of the last pump stage by 3 to 4%. This means a significant improvement in the overall efficiency, even with up to six-stage pump types, so that the pump can be amortized more quickly with the help of energy cost savings. The design in the form of inserts enables the pump to be easily adapted to the existing system by combining different inserts.

Eine Ausgestaltung der Erfindung sieht vor, daß die radial und/oder axial entwickelte Spirale Bestandteil eines Gehäusedeckels und/oder des letzten Stufengehäuses ist. Als vorteilhaft hat sich eine Spiralform erwiesen, welche sich zunächst in radialer Richtung und im Anschluß daran in axialer Richtung entwickelt. Sollten größere Räumlichkeiten zur Verfügung stehen, dann sind auch andere Entwicklungsrichtungen der Spirale möglich. Somit kann in vorteilhafter Weise auf eine Vergrößerung des Topfes verzichtet werden und der bisher zur Verfügung stehende Ringraum, in dem das aus der Kreiselpumpe austretende Fördermedium gesammelt und dem Druckstutzen zugeführt wird, für wirkungsgradverbessernde Maßnahmen benutzt werden. Durch die entsprechende Gestaltung des den Topf verschließenden Deckels sowie dessen Verwendung als leistungssteigerndes strömungsführendes Bauteil kann das Bauvolumen der Pumpe konstant gehalten werden.An embodiment of the invention provides that the radially and / or axially developed spiral is part of a housing cover and / or the last stage housing. A spiral shape has proven to be advantageous, which first develops in the radial direction and then in the axial direction. If larger rooms are available, other directions of development of the spiral are also possible. It is thus advantageously possible to dispense with an enlargement of the pot and the previously available annular space, in which the delivery medium emerging from the centrifugal pump is collected and fed to the pressure port, can be used for measures to improve efficiency. The volume of the pump can be kept constant through the appropriate design of the lid closing the pot and its use as a performance-enhancing flow-guiding component.

Eine weitere Ausgestaltung sieht vor, daß der Spiraleinsatz in Strömungsrichtung gesehen nach dem Leitradeinsatz angeordnet ist. Dadurch besteht die Möglichkeit, innerhalb eines gewünschten nq-Bereiches des Laufrades nur den Leitradeinsatz einem abgedrehten und/oder breiteren Laufrad anzupassen. Änderungs- oder Anpaßarbeiten an dem Spiraleinsatz können somit vollständig entfallen. Es ist auch möglich, den Leitradeinsatz selbst schaufellos auszubilden und gewissermaßen als Ringdiffusor vorzusehen, aus dem eine Überleitung in den Spiraleinsatz erfolgt. Dies ist abhängig von den gesamten Gegebenheiten, unter denen die Pumpe Verwendung finden soll.A further embodiment provides that the spiral insert is arranged after the stator insert when viewed in the flow direction. This makes it possible to adapt only the idler wheel insert to a turned and / or wider impeller within a desired n q range of the impeller. Changes or adjustments to the spiral insert can thus be completely omitted. It is also possible that To design the guide wheel insert itself without blades and to provide it as a kind of ring diffuser, from which a transfer to the spiral insert takes place. This depends on the overall circumstances under which the pump is to be used.

Zur sicheren Befestigung und einfachen Abdichtung des ebenfalls eine weitere Anpassung ermöglichenden diffusorförmigen Druckstutzeneinsatzes sieht eine andere Ausgestaltung der Erfindung vor, daß dieser vom Gehäuseinnern aus in den Druckstutzen einsetzbar ist. So ist es ohne weiteres möglich, beispielsweise mit einem vorstehenden Bund, den Einsatz direkt am Topfgehäuse anliegen zu lassen. Überdies ergibt sich damit der Vorteil, daß der diffusorförmige Einsatz aus einem besonders widerstandsfähigen Material gefertigt sein kann, um gegenüber den hohen Strömungsgeschwindigkeiten im Bereich der letzten Pumpenstufe Bestand haben zu können. Das Topfgehäuse selbst kann dann aus einem preislich günstigeren Material hergestellt werden, welches aus Gründen der Verschleißbeständigkeit mit einer entsprechenden Plattierung im Bereich der flüssigkeitsführenden Flächen versehen ist.For the secure attachment and simple sealing of the diffuser-shaped pressure nozzle insert, which also enables further adaptation, another embodiment of the invention provides that it can be inserted into the pressure nozzle from the inside of the housing. So it is easily possible, for example with a protruding collar, to have the insert rest directly on the pot housing. In addition, there is the advantage that the diffuser-shaped insert can be made of a particularly resistant material in order to be able to withstand the high flow velocities in the area of the last pump stage. The pot housing itself can then be produced from a material which is less expensive and, for reasons of wear resistance, is provided with a corresponding plating in the area of the liquid-carrying surfaces.

Das Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben. Es zeigen die

Fig. 1
einen Querschnitt durch den Druckstutzeneinsatz und den Spiraleinsatz, die
Fig. 2
einen Längsschnitt durch das Pumpengehäuse im Bereich der letzten Pumpenstufe, die
Fig. 3
eine Darstellung der Entwicklung des Spiraleinsatzes und die
Fig. 4
einen Querschnitt durch den Spiraleinsatz bei ungefähr 180° Spiralentwicklung.
The embodiment of the invention is illustrated in the drawings and is described in more detail below. They show
Fig. 1
a cross section through the pressure port insert and the spiral insert, the
Fig. 2
a longitudinal section through the pump housing in the area of the last pump stage, the
Fig. 3
a representation of the development of the spiral insert and the
Fig. 4
a cross section through the spiral insert at about 180 ° spiral development.

In der Fig. 1 ist ein Meridianschnitt durch den Spiraleinsatz 1 mit nachgeordnetem Diffusoreinsatz 2 gezeigt, wobei aus Gründen der Übersichtlichkeit der Leitradeinsatz nicht dargestellt wurde. Vom Beginn an erweitert sich im Spiraleinsatz 1 die Spirale 3 über ungefähr 100° bis auf ihren maximalen Durchmesser D, um dann bei gleichbleibendem Durchmesser eine Querschnittserweiterung in axialer Richtung zu erfahren. Im Bereich des Überganges vom Spiraleinsatz 1 in den Druckstutzeneinsatz 2 weist der Spiraleinsatz eine größte Querschnittsfläche auf. Die Spirale beginnt im Bereich des Leitradaustrittsdurchmessers DL.1 shows a meridian section through the spiral insert 1 with a downstream diffuser insert 2, the stator insert not being shown for reasons of clarity. From the beginning, the spiral 3 widens in the spiral insert 1 over approximately 100 ° to its maximum diameter D, in order to then experience a cross-sectional widening in the axial direction while the diameter remains the same. In the area of the transition from the spiral insert 1 to the pressure nozzle insert 2, the spiral insert has a largest cross-sectional area. The spiral begins in the area of the stator outlet diameter D L.

Der Druckstutzeneinsatz 2 verfügt in seinem Innern über eine diffusorförmige Erweiterung 4, welche im Bereich des Austrittes 5 weitgehend dem Querschnitt einer anzuschließenden Druckleitung entspricht. Die dem Spiraleinsatz 1 zugekehrte Fläche 6 des Diffusoreinsatzes 2 ist zylinderförmig ausgekehlt, um somit eine gute Anpassung an den Spiraleinsatz 1 zu ermöglichen. Ein vorstehender Bund 7 dient der Halterung des Diffusoreinsatzes 2 innerhalb des - hier lediglich durch eine Schraffur angedeuteten - Topfgehäuses.The pressure port insert 2 has a diffuser-shaped extension 4 in its interior, which largely corresponds to the cross section of a pressure line to be connected in the area of the outlet 5. The surface 6 of the diffuser insert 2 facing the spiral insert 1 is chamfered in the shape of a cylinder, in order to enable a good adaptation to the spiral insert 1. A projecting collar 7 serves to hold the diffuser insert 2 within the pot housing, which is only indicated by hatching.

Die Darstellung in Fig. 2, einem Schnitt gemäß II-II von Fig. 1, entspricht einem Längsschnitt durch ein Topfgehäuse 8 im Bereich der letzten Stufe. Hierbei ist erkennbar, daß in das Topfgehäuse 8 vom Pumpeninnern aus ein Diffusoreinsatz 2 in den Druckstutzen 9 eingeschoben ist. Ein von außen in das Topfgehäuse 8 eingeschobenes letztes Stufengehäuse 10 hält den Diffusoreinsatz 2 in seiner Position. Zwischen einer Stirnfläche 11 des letzten Stufengehäuses 10 und einem das Topfgehäuse 8 verschließenden Deckel 12 ist ein Leitradeinsatz 13 angeordnet, welcher durch verdrehsichernde Elemente 14 in seiner Position gehalten wird. Das hier gezeigte letzte Laufrad 15 ist auf einer Welle 16 angeordnet, die von einem innerhalb des Deckels 12 befindlichen Dichtungs- und Lagergehäuses 17 gehalten wird. Durch eine entsprechende Kombination von Leitrad-, Stufengehäuse- und Spiraleinsätzen sowie Laufrädern kann in einfachster Weise eine wirkungsgradsteigernde Anpassung an die jeweiligen Anlagenverhältnisse erfolgen. Der Spiraleinsatz 1, der hier als eigenständiges Bauteil ausgebildet wurde, kann auch integraler Bestandteil des das Topfgehäuse 8 verschließenden Deckels 12 sein. Gleiches gilt für den Leitradeinsatz 13. Es ist auch ohne weiteres möglich, die Funktion des Spiraleinsatzes und/oder des Leitradeinsatzes 13 auf das letzte Stufengehäuseteil 10 zu übertragen. Der freie Spiralquerschnitt ist hier mit 18 gekennzeichnet.The illustration in FIG. 2, a section according to II-II of FIG. 1, corresponds to a longitudinal section through a pot housing 8 in the area of the last stage. It can be seen here that a diffuser insert 2 is inserted into the pressure socket 9 from the inside of the pump into the pot housing 8. A last stage housing 10 inserted from the outside into the pot housing 8 holds the diffuser insert 2 in position. Between an end face 11 of the last stage housing 10 and a cover 12 which closes the pot housing 8, a guide wheel insert 13 is arranged, which is held in position by elements 14 preventing rotation. The last one shown here Impeller 15 is arranged on a shaft 16, which is held by a sealing and bearing housing 17 located within cover 12. A suitable combination of stator, stage housing and spiral inserts as well as impellers can be used to easily adapt the efficiency to the respective system conditions. The spiral insert 1, which was designed here as an independent component, can also be an integral part of the cover 12 closing the pot housing 8. The same applies to the stator insert 13. It is also readily possible to transfer the function of the spiral insert and / or the stator insert 13 to the last stage housing part 10. The free spiral cross section is marked here with 18.

In der Darstellung von Fig. 3 sind die einzelnen Querschnittserweiterungen der Spirale gezeigt. Die mit starker Strichstärke umrandete Fläche entspricht einem freien Spiralquerschnitt 18 bei 360° Umschlingungswinkel, d. h. am Spiralaustritt. Die innerhalb dieser Fläche angeordneten dünnen Linien, die mit Gradzahlen versehen sind, geben denjenigen Spiralquerschnitt wieder, der mit gleichlautenden Gradzahlen in der Fig. 1 markiert ist. Im Bereich ab ca. 100° Spiral-Umschlingungswinkel verfügt die Spirale über einen konstanten Außendurchmesser. Der Spiralquerschnitt verändert sich dann nur noch seitlich in axialer Richtung und gegebenenfalls auch radial nach innen.The individual cross-sectional extensions of the spiral are shown in the representation of FIG. 3. The area outlined with a thick line corresponds to a free spiral cross section 18 at a 360 ° wrap angle, i. H. at the spiral outlet. The thin lines arranged within this area, which are provided with degrees, represent the spiral cross section which is marked with identical degrees in FIG. 1. In the range from approx. 100 ° spiral wrap angle, the spiral has a constant outer diameter. The spiral cross section then only changes laterally in the axial direction and, if appropriate, also radially inwards.

Die Fig. 4 zeigt gemäß Linie IV-IV aus Fig. 1 einen Schnitt durch die letzte Stufe der Pumpe bei etwa 180° Spiralwinkel. Der Spiralquerschnitt 18 der Spirale entspricht dem aus Fig. 3 bei 180°.4 shows a section along line IV-IV of FIG. 1 through the last stage of the pump at a spiral angle of approximately 180 °. The spiral cross section 18 of the spiral corresponds to that from FIG. 3 at 180 °.

Claims (5)

Kreiselpumpe in Topfgehäusebauart mit zwischen den einzelnen Pumpenlaufrädern eingesetzten strömungsführenden Stufengehäusen, dadurch gekennzeichnet, daß innerhalb des Topfgehäuses (8) im Bereich des letzten Stufengehäuses (10) ein Leitradeinsatz (13), ein radial und/oder axial entwickelter Spiraleinsatz (1) und ein diffusorförmiger Druckstutzeneinsatz (2) angeordnet sind.Centrifugal pump in pot housing design with flow-guiding stage housings inserted between the individual pump impellers, characterized in that within the pot housing (8) in the area of the last stage housing (10) a stator wheel insert (13), a radially and / or axially developed spiral insert (1) and a diffuser-shaped one Pressure port insert (2) are arranged. Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der radial und/oder axial entwickelte Spiraleinsatz (1) Bestandteil eines Gehäusedeckels (12) und/oder des letzten Stufengehäuses (10) ist.Centrifugal pump according to claim 1, characterized in that the radially and / or axially developed spiral insert (1) is part of a housing cover (12) and / or the last stage housing (10). Kreiselpumpe nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der Spiraleinsatz (1) in Strömungsrichtung gesehen nach dem Leitradeinsatz (13) angeordnet ist.Centrifugal pump according to claims 1 and 2, characterized in that the spiral insert (1), viewed in the flow direction, is arranged after the guide wheel insert (13). Kreiselpumpe nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß der diffusorförmige Druckstutzeneinsatz (2) vom Gehäuseinnern aus in den Druckstutzen (9) einsetzbar ist.Centrifugal pump according to claims 1 to 3, characterized in that the diffuser-shaped pressure nozzle insert (2) can be inserted into the pressure nozzle (9) from the inside of the housing. Kreiselpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Leitradeinsatz (13) schaufellos ausgebildet ist.Centrifugal pump according to one of claims 1 to 4, characterized in that the guide wheel insert (13) is designed without blades.
EP94103537A 1993-03-31 1994-03-09 Barrel-type pump Expired - Lifetime EP0618369B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4310467 1993-03-31
DE4310467A DE4310467A1 (en) 1993-03-31 1993-03-31 Pot housing pump

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EP0618369A1 true EP0618369A1 (en) 1994-10-05
EP0618369B1 EP0618369B1 (en) 1997-05-21

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EP (1) EP0618369B1 (en)
JP (1) JP2794160B2 (en)
DE (2) DE4310467A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651998A (en) * 1951-06-29 1953-09-15 Dayton Pump & Mfg Company Centrifugal pump
US2708883A (en) * 1950-03-03 1955-05-24 Escher Wyss Ag Arrangement for use in radial centrifugal compressors and pumps for the conversion of kinetic energy of the flowing medium into pressure energy
FR1251632A (en) * 1960-03-17 1961-01-20 G & J Weir Ltd Improvements to centrifugal pumps
US3091182A (en) * 1960-12-08 1963-05-28 Shell Oil Co Centrifugal pumps
GB1081164A (en) * 1963-07-19 1967-08-31 Ulrich Max Willi Barske Improvements in and relating to centrifugal pumps
US5180280A (en) * 1990-05-28 1993-01-19 Toshiharu Honda Centrifugal pump

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE21571C (en) * G. HAMBRL'CH in Berlin Innovations in indicators for the investigation of steam engines
US2161695A (en) * 1938-08-01 1939-06-06 Pacific Pump Works Rotary pump for hot fluids
GB526732A (en) * 1939-03-27 1940-09-24 Mather & Platt Ltd Improvements in multi-stage centrifugal pumps
US3370542A (en) * 1965-10-21 1968-02-27 Dresser Ind Temperature detection device
US3689931A (en) * 1971-05-19 1972-09-05 Luis R Pagan Fortis Centrifugal pumps
US4076450A (en) * 1976-01-14 1978-02-28 United Centrifugal Pumps Double volute pump with replaceable lips
DE2614163C2 (en) * 1976-04-02 1977-10-13 Balcke-Dürr AG, 4030 Ratingen Multi-stage centrifugal pump
US4893986A (en) * 1979-10-29 1990-01-16 Rockwell International Corporation High-pressure high-temperature coal slurry centrifugal pump and let-down turbine
DE3011888A1 (en) * 1980-03-27 1981-10-01 Richard 7066 Baltmannsweiler Halm In line mounting centrifugal pump - has insert in casing with suction channel coupled to suction opening and to impeller
CH669979A5 (en) * 1986-04-30 1989-04-28 Sulzer Ag
DE4041545A1 (en) * 1990-02-21 1991-08-22 Klein Schanzlin & Becker Ag CENTRIFUGAL PUMP
US5076758A (en) * 1990-07-18 1991-12-31 Ingersoll-Rand Company Centrifugal pumps

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708883A (en) * 1950-03-03 1955-05-24 Escher Wyss Ag Arrangement for use in radial centrifugal compressors and pumps for the conversion of kinetic energy of the flowing medium into pressure energy
US2651998A (en) * 1951-06-29 1953-09-15 Dayton Pump & Mfg Company Centrifugal pump
FR1251632A (en) * 1960-03-17 1961-01-20 G & J Weir Ltd Improvements to centrifugal pumps
US3091182A (en) * 1960-12-08 1963-05-28 Shell Oil Co Centrifugal pumps
GB1081164A (en) * 1963-07-19 1967-08-31 Ulrich Max Willi Barske Improvements in and relating to centrifugal pumps
US5180280A (en) * 1990-05-28 1993-01-19 Toshiharu Honda Centrifugal pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2653727A4 (en) * 2010-12-14 2017-06-14 Kubota Corporation Multistage pump
US10001143B2 (en) 2013-02-26 2018-06-19 Mitsubishi Heavy Industries Compressor Corporation Method for assembling compressor, and bundle guide device
WO2020187562A1 (en) * 2019-03-19 2020-09-24 KSB SE & Co. KGaA Barrel casing pump and method for manufacturing a barrel casing pump

Also Published As

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JP2794160B2 (en) 1998-09-03
EP0618369B1 (en) 1997-05-21
US5522701A (en) 1996-06-04
JPH0754798A (en) 1995-02-28
DE4310467A1 (en) 1994-10-06
DE59402797D1 (en) 1997-06-26

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