EP0101915A2 - Housing for a centrifugal pump - Google Patents

Housing for a centrifugal pump Download PDF

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Publication number
EP0101915A2
EP0101915A2 EP83107263A EP83107263A EP0101915A2 EP 0101915 A2 EP0101915 A2 EP 0101915A2 EP 83107263 A EP83107263 A EP 83107263A EP 83107263 A EP83107263 A EP 83107263A EP 0101915 A2 EP0101915 A2 EP 0101915A2
Authority
EP
European Patent Office
Prior art keywords
housing
end portion
section
main section
insert
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
EP83107263A
Other languages
German (de)
French (fr)
Other versions
EP0101915A3 (en
EP0101915B1 (en
Inventor
Günter Dr. Feldle
Klaus Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Klein Schanzlin and Becker AG
Original Assignee
Klein Schanzlin and Becker AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Klein Schanzlin and Becker AG filed Critical Klein Schanzlin and Becker AG
Priority to AT83107263T priority Critical patent/ATE28231T1/en
Publication of EP0101915A2 publication Critical patent/EP0101915A2/en
Publication of EP0101915A3 publication Critical patent/EP0101915A3/en
Application granted granted Critical
Publication of EP0101915B1 publication Critical patent/EP0101915B1/en
Expired legal-status Critical Current

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49243—Centrifugal type

Definitions

  • the invention relates to a pot housing for centrifugal pumps according to the preamble of the main claim.
  • the invention has for its object to develop a little complex pot housing, which is easy to manufacture under high loads. This object is achieved in accordance with the characterizing part of the main claim.
  • a simple cylindrical tube piece into which inserts that are just as easy to manufacture are inserted and connected to the tube piece in a sealing and / or force-absorbing manner, a housing that absorbs high forces can be created with very little effort.
  • the end face of the insert or inserts located within the pipe section serves as an attachment for the stage housing package and the part of the insert section located outside the pipe section acts as the inlet side.
  • Another embodiment of the invention provides that the insert or inserts are arranged in the end region of the pipe section, the inward end face of which forms an axial contact surface for the step housing. The outer end face can end with the pipe section or come to rest within the same.
  • the housings manage with a minimum of machining.
  • the pipe section and inserts can be made from cast, rolled or forged pipe sections. After insertion and alignment, it is sufficient to weld the parts, to fix them in place by means of screw connections or in a form-fitting manner. Since the inserts take up the maximum surface pressure occurring within the pot housing, should the material of the inserts forming the shoulder has at least the strength of the step housing acting against it.
  • a further embodiment provides that the insert arranged within the pipe section is an overlay welded collar. This measure further simplifies production.
  • Fig. 1 shows schematically the example of the pot housing according to US-PS 31 53 383, how much material is to be removed from a raw ling.
  • the cross-hatched areas correspond to the areas to be processed. Even if, for example, the blank was already forged, there are enough surfaces that are difficult to machine.
  • annular insert 2 is introduced in such a way forces on ehmend h and sealingly that its protrudes from one end of the pipe section 1 and forms the low-pressure part of the pot pump. Compared to the pipe section 1 covering the high pressure area, it is designed to be correspondingly thinner.
  • the contact surface 3 serves to support the stage housing package 4 shown in broken lines, in particular as a system for the stage housing of FIG. 1. Step.
  • FIG. 3 shows an embodiment in which a shorter and thinner insert 2 is completely inserted into the pipe section 1 and here ends flush with the end.
  • the cohesion takes place here, as in FIG. 2, by means of a welded connection 5.
  • this has only a sealing function, since the forces acting on the surface 2 can be absorbed by the cover 6 shown in broken lines.
  • FIG. 4 shows an embodiment in which the insert 2 was created by means of surfacing. Its dimensions depend on the strength values of the materials used.

Landscapes

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

Abstract

The barrel housing of a multistage centrifugal pump has an elongated cylindrical main section and a discrete annular section which is inserted into one end portion and defines an annular shoulder facing the other end portion of the main section. The shoulder is engaged by the inner casing of the pump. The annular section can constitute a prefabricated component or is formed by cladding. The inlet opening of the housing is provided only in the one end portion of the main section, only in a portion of the annular section which extends outwardly beyond the one end portion of the main section, or is a composite opening having a first part in the one end portion of the main section and a registering second part in the annular section. The outlet opening for compressed fluid is provided in the other end portion of the main section.

Description

Die Erfindung betrifft ein Topfgehäuse für Kreiselpumpen gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a pot housing for centrifugal pumps according to the preamble of the main claim.

Aus der US-PS 30 51 090 sowie der US-PS 31 53 383 ist eine derartige Pumpenkonstruktion bekannt, bei der ein zusammengespanntes Stufengehäusepaket im Bereich der Saugseite an einem Ansatz des Topfgehäuses anliegt. Diese Anlage sowie der Zusammenhalt der einzelnen Stufengehäuse erfolgt bei dieser Konstruktion durch Zuganker. Es sind auch andere Konstruktionen geläufig, bei denen beispielsweise der druckseitige Gehäusedeckel des Topfgehäuses die einzelnen Stufengehäuse gegen diesen Ansatz preßt. Der Ansatz dient zur Aufnahme derjenigen Kräfte, die innerhalb des Topfgehäuses vorherrschen und durch die Geometrie der hydraulischen Einbauten sowie der Dichtungskräfte bestimmt sind. Die Anlagefläche für die Stufengehäuse bildet somit die Trennung zwischen der druckmäßig niedrig belasteten Zulaufseite und dem hochbelasteten Bereich am Pumpenaustritt bzw. dem die Stufengehäuse umhüllenden Topfgehäuse . Die an dieser Anlagefläche vorherrschende Flächenpressung bedingt eine bestimmte radiale Breite und bestimmt somit auch den Innendurchmesser des Topfgehäuses. Aufgrund dessen ist auf der Zulaufseite, trotz des dort vorherrschenden geringeren Druckes, das Topfgehäuse in der Regel dicker als auf der Druckseite ausgebildet.From US-PS 30 51 090 and US-PS 31 53 383 such a pump construction is known in which a clamped stage housing package in the area of the suction side rests on a shoulder of the pot housing. In this construction, this system and the cohesion of the individual step housings is carried out by tie rods. There are also other constructions in which, for example, the pressure-side housing cover of the pot housing presses the individual step housing against this approach. The approach serves to absorb those forces that prevail within the pot housing and that are determined by the geometry of the hydraulic internals and the sealing forces. The contact surface for the stage housing thus forms the separation between the inlet side with low pressure loads and the highly loaded area at the pump outlet or the pot housing enveloping the stage housing. The prevailing surface pressure on this contact surface requires a certain radial width and thus also determines the inside diameter of the pot housing. Because of this, the pot housing is generally thicker on the inlet side, despite the lower pressure prevailing there, than on the pressure side.

Der Erfindung liegt die Aufgabe zugrunde, ein wenig aufwendiges Topfgehäuse zu entwickeln, welches bei hoher Belastung einfach zu fertigen ist. Die Lösung dieser Aufgabe erfolgt gemäß dem kennzeichnenden Teil des Hauptanspruches. Somit kann durch die Verwendung eines einfachen zylinderförmigen Rohrstückes, in das ebenso einfach herzustellende Einsätze eingebracht und mit dem Rohrstück dichtend und/oder kräfteaufnehmend verbunden werden, mit geringstem Aufwand ein hohe Kräfte aufnehmendes Gehäuse erstellt werden. Die innerhalb des Rohrstückes befindliche Stirnseite des oder der Einsätze dient als Anlage für das Stufengehäusepaket und der außerhalb des Rohrstückes befindliche Teil des Einsatzstückes wirkt als Zulaufseite. Eine andere Ausgestaltung der Erfindung sieht vor, daß der Einsatz oder die Einsätze im Endbereich des Rohrstückes angeordnet sind, wobei deren nach innen gerichtete Stirnseite eine axiale Anlagefläche für die Stufengehäuse bildet. Die äußere Stirnseite kann hierbei mit dem Rohrstück abschließen oder innerhalb desselben zum Liegen kommen.The invention has for its object to develop a little complex pot housing, which is easy to manufacture under high loads. This object is achieved in accordance with the characterizing part of the main claim. Thus, by using a simple cylindrical tube piece, into which inserts that are just as easy to manufacture are inserted and connected to the tube piece in a sealing and / or force-absorbing manner, a housing that absorbs high forces can be created with very little effort. The end face of the insert or inserts located within the pipe section serves as an attachment for the stage housing package and the part of the insert section located outside the pipe section acts as the inlet side. Another embodiment of the invention provides that the insert or inserts are arranged in the end region of the pipe section, the inward end face of which forms an axial contact surface for the step housing. The outer end face can end with the pipe section or come to rest within the same.

Beiden Ausführungsformen ist zu eigen, daß die Gehäuse mit einem Minimum an spanender Fertigung auskommen. Das Rohrstück und die Einsätze können aus gegossenen, gewalzten oder geschmiedeten Rohrstücken hergestellt werden. Nach dem Einbringen und Ausrichten genügt es, die Teile zu verschweißen, mittels Schraubverbindungen oder formschlüssig in ihrer Lage zu fixieren. Da von den Einsätzen die innerhalb des Topfgehäuses maximal auftretende Flächenpressung aufgenommen wird, sollte der Werkstoff der den Absatz bildenden Einsätze mindestens die Festigkeit des dagegen wirkenden Stufengehäuses besitzt.It is characteristic of both embodiments that the housings manage with a minimum of machining. The pipe section and inserts can be made from cast, rolled or forged pipe sections. After insertion and alignment, it is sufficient to weld the parts, to fix them in place by means of screw connections or in a form-fitting manner. Since the inserts take up the maximum surface pressure occurring within the pot housing, should the material of the inserts forming the shoulder has at least the strength of the step housing acting against it.

Mit der Erfindung ist es möglich, die Topfgehäuse für Kreiselpumpen als wesentlich dünnwandigere Rohlinge zu beschaffen und je nach Größe der einzelnen Pumpe, den jeweils Anwendung findenden Stufenzahlen und dem maximalen Enddruck gravierende Verringerungen hinsichtlich der spanenden Bearbeitung sowie des Materialeinsatzes zu erzielen.With the invention, it is possible to procure the pot housing for centrifugal pumps as much thinner-walled blanks and, depending on the size of the individual pump, the number of stages used and the maximum final pressure, to achieve serious reductions in terms of machining and the use of materials.

Eine weitere Ausgestaltung sieht vor, daß der innerhalb des Rohrstückes angeordnete Einsatz ein auftragsgeschweißter Bund ist. Diese Maßnahme bedingt eine weitere Fertigungsvereinfachung.A further embodiment provides that the insert arranged within the pipe section is an overlay welded collar. This measure further simplifies production.

In den Zeichnungen werden Ausführungsbeispiele dargestellt und werden im folgenden näher beschrieben. Es zeigen

  • Fig. 1 skizzenhaft die bisherige Ausführungsform eines Topfgehäuses gemäß der US-PS 31 53 383,
  • Fig. 2 die neue Ausführungsform mit herausragendem Einsatz,
  • Fig. 3. einen bündig abschließenden Einsatz und
  • Fig. 4 einen auftragsgeschweißten Einsatz
Exemplary embodiments are shown in the drawings and are described in more detail below. Show it
  • 1 sketchy the previous embodiment of a pot housing according to US-PS 31 53 383,
  • 2 the new embodiment with outstanding use,
  • Fig. 3. a flush insert and
  • Fig. 4 shows a welded insert

Fig. 1 zeigt schematisch am Beispiel des Topfgehäuses gemäß der US-PS 31 53 383, wieviel Material von einem Roh ling zu entfernen ist. Die kreuzschraffierten Bereiche entsprechen den zu bearbeitenden Flächen. Auch wenn der Rohling beispielsweise schon abgesetzt geschmiedet war, so bleiben doch genügend aufwendig zu bearbeitende Flächen übrig.Fig. 1 shows schematically the example of the pot housing according to US-PS 31 53 383, how much material is to be removed from a raw ling. The cross-hatched areas correspond to the areas to be processed. Even if, for example, the blank was already forged, there are enough surfaces that are difficult to machine.

In Fig. 2 ist eine Ausführungsform gemäß der Erfindung dargestellt. In dem Rohrstück 1 ist ein ringförmiger Einsatz 2 derart kräfteaufhehmend sowie dichtend eingebracht, daß sein eines Ende aus dem Rohrstück 1 herausragt und den Niederdruckteil der Topfpumpe bildet. Gegenüber dem den Hochdruckbereich abdeckenden Rohrstück 1 ist es entsprechend dünnwandiger ausgelegt. Die Anlagefläche 3 dient zur Abstützung für das gestrichelt dargestellte Stufengehäusepaket 4, insbesondere als Anlage für das Stufengehäuse der 1 . Stufe.2 shows an embodiment in accordance with the invention. In the pipe section 1, an annular insert 2 is introduced in such a way forces on ehmend h and sealingly that its protrudes from one end of the pipe section 1 and forms the low-pressure part of the pot pump. Compared to the pipe section 1 covering the high pressure area, it is designed to be correspondingly thinner. The contact surface 3 serves to support the stage housing package 4 shown in broken lines, in particular as a system for the stage housing of FIG. 1. Step.

In Fig. 3 ist eine Ausführungsform gezeigt, bei der ein kürzerer und dünnerer Einsatz 2 in das Rohrstück 1 vollständig eingebracht ist und hier mit -dessen Ende bündig abschließt. Der Zusammenhalt erfolgt hier wie in Fig. 2 mittels einer Schweißverbindung 5. Diese hat in diesem Beispiel jedoch nur dichtende Funktion, da die auf die Fläche 2 einwirkenden Kräfte von dem gestrichelt dargestellten Deckel 6 aufgenommen werden können.FIG. 3 shows an embodiment in which a shorter and thinner insert 2 is completely inserted into the pipe section 1 and here ends flush with the end. The cohesion takes place here, as in FIG. 2, by means of a welded connection 5. In this example, however, this has only a sealing function, since the forces acting on the surface 2 can be absorbed by the cover 6 shown in broken lines.

Die Fig. 4 zeigt eine Ausführungsform, bei der der Einsatz 2 mittels einer Auftragsschweißung erstellt wurde. Dessen Abmessungen sind von den Festigkeitswerten der Anwendung findenden Werkstoffe abhängig.FIG. 4 shows an embodiment in which the insert 2 was created by means of surfacing. Its dimensions depend on the strength values of the materials used.

Allen Figuren ist gemeinsam, daß die dargestellten Pfeile die Zuflußrichtung zur Saugseite der Pumpe und die Abflußrichtung von der Druckseite der Pumpe markieren .It is common to all figures that the arrows shown mark the inflow direction to the suction side of the pump and the outflow direction from the pressure side of the pump.

Claims (3)

1. Topfgehäuse für Kreiselpumpen, bei dem innerhalb des druckaufnehmenden Topfgehäuses angeordnete Stufengegehäuse an einem gehäusefesten Ansatz zur Anlage gelangen, dadurch gekennzeichnet, daß das Topfgehäuse mehrteilig ausgebildet ist, wobei ein äußeres zylinderförmiges Rohrstück (1) ein oder mehrere ringförmige Einsätze (2) aufweist und daß der Einsatz oder die Einsätze mit dem Rohrstück und/oder miteinander dichtend und/oder kräfteaufnehmend verbunden sind.1. pot housing for centrifugal pumps, in which arranged within the pressure-absorbing pot housing step housing on a housing-fixed approach to the system, characterized in that the pot housing is constructed in several parts, wherein an outer cylindrical tube section (1) has one or more annular inserts (2) and that the insert or inserts are connected to the pipe section and / or to one another in a sealing and / or force-absorbing manner. 2. Gehäuse nach Anspruch 1, dadurch gekennzeichnet, daß der Einsatz (2) oder die Einsätze im Endbereich des Rohrstückes (1) angeordnet sind, wobei deren nach innen gerichtete Stirnseite eine axiale Anlagefläche (3) für die Stufengehäuse bildet.2. Housing according to claim 1, characterized in that the insert (2) or the inserts are arranged in the end region of the pipe section (1), the inwardly facing end face of which forms an axial contact surface (3) for the step housing. 3. Gehäuse nach Anspruch 1,dadurch gekennzeichnet, daß der innerhalb des Rohrstückes (1) angeordnete Einsatz (2) ein auftragsgeschweißter Bund ist.3. Housing according to claim 1, characterized in that the inside of the pipe section (1) arranged insert (2) is a welded collar.
EP83107263A 1982-08-31 1983-07-25 Housing for a centrifugal pump Expired EP0101915B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83107263T ATE28231T1 (en) 1982-08-31 1983-07-25 POT HOUSING FOR CENTRIFUGAL PUMPS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3232326 1982-08-31
DE3232326A DE3232326C2 (en) 1982-08-31 1982-08-31 Pot housing for centrifugal pumps

Publications (3)

Publication Number Publication Date
EP0101915A2 true EP0101915A2 (en) 1984-03-07
EP0101915A3 EP0101915A3 (en) 1985-05-15
EP0101915B1 EP0101915B1 (en) 1987-07-08

Family

ID=6172129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107263A Expired EP0101915B1 (en) 1982-08-31 1983-07-25 Housing for a centrifugal pump

Country Status (7)

Country Link
US (1) US4536128A (en)
EP (1) EP0101915B1 (en)
JP (1) JPS5944000A (en)
AT (1) ATE28231T1 (en)
DE (1) DE3232326C2 (en)
DK (1) DK163735C (en)
IN (1) IN159738B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014060163A1 (en) * 2012-10-16 2014-04-24 Siemens Aktiengesellschaft Weld-free pot volute casing
US20160003263A1 (en) * 2013-02-26 2016-01-07 Mitsubishi Heavy Industries Compressor Corporation Method for assembling compressor, and bundle guide device
CN109469646A (en) * 2018-10-22 2019-03-15 沈阳透平机械股份有限公司 Space division casing structure
US10233945B2 (en) 2013-02-27 2019-03-19 Mitsubishi Heavy Industries Compressor Corporation Compressor assembly method, and bundle guiding device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035575A1 (en) * 2009-07-31 2011-03-03 Man Diesel & Turbo Se Radial compressor and method of manufacturing a radial compressor
DE102009035573A1 (en) 2009-07-31 2011-02-10 Man Diesel & Turbo Se Radial compressor and method of manufacturing a radial compressor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153383A (en) * 1961-08-11 1964-10-20 Laval Turbine Means and method of assembling a pump, compressor, turbine or the like
FR2466646A1 (en) * 1979-10-03 1981-04-10 Klein Schanzlin & Becker Ag CENTRIFUGAL PUMP BODY

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GB497356A (en) * 1936-07-29 1938-12-19 Babcock & Wilcox Ltd Improvements in or relating to welded joints
US2430382A (en) * 1944-12-30 1947-11-04 Worthington Pump & Mach Corp Centrifugal machine casing
GB845713A (en) * 1957-01-24 1960-08-24 G & J Weir Ltd Improvements in or relating to centrifugal pumps
US3105632A (en) * 1960-03-14 1963-10-01 Dresser Ind High pressure centrifugal compressor
US3051090A (en) * 1960-08-04 1962-08-28 Worthington Corp Segmented casing for multistage centrifugal fluid machines
US3103892A (en) * 1960-11-21 1963-09-17 Laval Turbine Pump or the like
US3733145A (en) * 1971-03-04 1973-05-15 Nevsky Mash Vand-type centrifugal machine, mainly, high-pressure compressor
US3801215A (en) * 1972-08-02 1974-04-02 Goulds Pumps Axial thrust limiting device
JPS5472503A (en) * 1977-11-21 1979-06-11 Hitachi Ltd Assembly method of double centrifugal turbo machine
US4215809A (en) * 1978-11-17 1980-08-05 Salvatore Panzeca Pipe welding apparatus
US4299536A (en) * 1979-08-09 1981-11-10 Roy E. Roth Company Multi-stage pumps
US4307995A (en) * 1980-02-01 1981-12-29 Rockwell International Corporation Vaneless multistage pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153383A (en) * 1961-08-11 1964-10-20 Laval Turbine Means and method of assembling a pump, compressor, turbine or the like
FR2466646A1 (en) * 1979-10-03 1981-04-10 Klein Schanzlin & Becker Ag CENTRIFUGAL PUMP BODY

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014060163A1 (en) * 2012-10-16 2014-04-24 Siemens Aktiengesellschaft Weld-free pot volute casing
US20160003263A1 (en) * 2013-02-26 2016-01-07 Mitsubishi Heavy Industries Compressor Corporation Method for assembling compressor, and bundle guide device
US10001143B2 (en) 2013-02-26 2018-06-19 Mitsubishi Heavy Industries Compressor Corporation Method for assembling compressor, and bundle guide device
US10233945B2 (en) 2013-02-27 2019-03-19 Mitsubishi Heavy Industries Compressor Corporation Compressor assembly method, and bundle guiding device
CN109469646A (en) * 2018-10-22 2019-03-15 沈阳透平机械股份有限公司 Space division casing structure
CN109469646B (en) * 2018-10-22 2021-06-11 沈阳透平机械股份有限公司 Air separation casing structure

Also Published As

Publication number Publication date
DK163735B (en) 1992-03-30
DK377683A (en) 1984-03-01
IN159738B (en) 1987-06-06
EP0101915A3 (en) 1985-05-15
DE3232326A1 (en) 1984-03-08
US4536128A (en) 1985-08-20
JPS5944000A (en) 1984-03-12
EP0101915B1 (en) 1987-07-08
DK163735C (en) 1992-08-24
DK377683D0 (en) 1983-08-18
ATE28231T1 (en) 1987-07-15
DE3232326C2 (en) 1985-10-03

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