EP0588258B1 - Carter d'etage en plusieurs parties - Google Patents

Carter d'etage en plusieurs parties Download PDF

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Publication number
EP0588258B1
EP0588258B1 EP93114584A EP93114584A EP0588258B1 EP 0588258 B1 EP0588258 B1 EP 0588258B1 EP 93114584 A EP93114584 A EP 93114584A EP 93114584 A EP93114584 A EP 93114584A EP 0588258 B1 EP0588258 B1 EP 0588258B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
elements
stage housing
stage
housing
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.)
Expired - Lifetime
Application number
EP93114584A
Other languages
German (de)
English (en)
Other versions
EP0588258A1 (fr
Inventor
Jörg Urban
Axel Riel
Herbert Hartmüller
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.)
KSB AG
Original Assignee
KSB 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 KSB AG filed Critical KSB AG
Publication of EP0588258A1 publication Critical patent/EP0588258A1/fr
Application granted granted Critical
Publication of EP0588258B1 publication Critical patent/EP0588258B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers 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
    • 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

Definitions

  • the invention relates to a multi-part stage housing for use in centrifugal pumps.
  • DE-PS 323 630 stage housing is mentioned as the prior art, in which several cast parts are assembled into a uniform step housing.
  • a stator part equipped with open vane channels is partially covered in its entry area by a separate wear ring. This is to protect the pump housing against wear.
  • a one-piece, closed stator ring is then used to avoid the complex construction.
  • stage housings From DE-OS 26 43 462 different types of assemble stage housings are known.
  • the shape of the stage housing parts which have the side wheel ducts and the return ducts is very complicated and requires complex techniques.
  • the invention is therefore based on the object of developing a stage housing design which ensures better energy conversion with the simplest manufacture. This problem is solved in accordance with the characterizing part of the main claim.
  • the tubular ring element the dimensions of which are designed according to the respective stage pressure or the pump pressure, is easy to manufacture.
  • the flow leading are easy to manufacture.
  • the flow-carrying insert with its open channels can also be produced very easily, for example in a machining or casting technique with a high surface quality. The latter offers a good prerequisite for very low-loss flow control.
  • the membrane-like, ring-shaped ring elements which can be produced as sheet metal parts according to an embodiment of the invention.
  • their smooth surface guarantees the lowest flow losses.
  • different materials can be combined with each other, which enables targeted adaptation to the various loads occurring within a step housing. In places of high erosion wear, higher quality material can be used than in places of simple stress.
  • the membrane-like elements are arranged sealingly within a tubular ring element. So it is e.g. possible to shield the tubular element from the medium through the membrane-like elements.
  • the latter could, for example, consist of highly corrosion-resistant stainless steel sheets, while the tubular element can be produced from a simple material.
  • the sealing arrangement serves to prevent leakage of liquid.
  • the configuration according to claim 4 also serves the same measure.
  • one of the membrane-like elements is provided with a shoulder formed on a small diameter to form a split ring seal on an impeller neck which is immersed therein.
  • two membrane-like elements are captively connected to one another.
  • This can be an element covering the suction-side wheel side space and an element covering the open return channels.
  • This makes it possible to realize a low loss wheel side space and the assembly can also be simplified in that only a single part is to be assembled.
  • An embodiment according to claim 7 provides for attachment to the molded-on shoulder that forms the split ring seal.
  • the parts can be welded together or put together by a non-releasable snap lock.
  • Pressure equalization measures serve the embodiment of claim 8.
  • the space between the membrane-like elements can be pressurized by a downstream pump stage. This depends on the stage pressures prevailing in the pump.
  • a sealing pressure of the membrane-like element resting on the return channels can take place.
  • the flow-carrying inserts transmit the axial force resulting from the respective step differential pressure to the ring element. The latter then passes it on to the fastening means holding the pump together.
  • the outer casing of a stage housing (1) is formed by a tubular ring element (2) which is dimensioned to accommodate the full stage pressure.
  • the ring element (2) has an end-side projection (3) which is arranged on a small diameter and which can be inserted in a sealing manner in a shoulder (4) of the ring element of the pump stage which is arranged here according to a corresponding diameter.
  • the projections (3) and shoulders (4) can also be arranged in the opposite direction.
  • the individual ring elements can thus be easily assembled, with a sealing ring (5) ensuring the seal to the outside.
  • An annular membrane-like element (6) is also inserted into the heel (4) and sealed against the ring element (2) with the interposition of a sealing ring (7).
  • a flow-carrying insert (8) is also inserted into the shoulder (4) and guided with a collar (9).
  • the flow-carrying insert (8) has guide channels (10) which are open in the axial direction and return channels (11).
  • the dashed line running horizontally in the drawing between the guide channels (10) and the return channels (11) symbolizes the transition between these channels, which is necessary so that the medium can flow over.
  • the insert (8) can be created both in terms of casting technology and in a machining manner. This ensures a high surface quality and thus low flow losses.
  • the flow-carrying insert (8) covers an impeller (12).
  • a membrane-like annular element (6) covers the return channels (11), while an annular membrane-like element (13) covers the stator channels of a subsequent pump stage.
  • the elements In order to obtain a sealing contact pressure of the element (6) against the return channels (11) at high step pressures in the space (14) between the two elements (6) and (13), the elements have (15).
  • the pressure of the stator of a downstream pump stage is higher than the pressure in the return channels (11) of the previous stage, so that a secure pressure of the membrane-like element (6) on the open return channels (11) is ensured. Since the stage housing and its individual parts are only to be plugged into one another, the middle flow-guiding insert (8) here is shown in a different position rotated in the circumferential direction.
  • the element (6) has a molded-on shoulder (16) which has a double function.
  • the shoulder (16) is designed as a split ring for a downstream impeller (17).
  • the element (13) can be pushed onto the shoulder (16). With its innermost diameter, it then lies captively on the shoulder (16) in the manner of a snap lock.
  • the elements (6) and (13) with projections are clamped between the ring elements (2) in a sealing manner. It is also easily possible to press the elements with an annular peripheral surface in a sealing manner into the ring element.
  • the shape of the membrane-like elements (6, 13) shown can be easily adapted to different shapes of stator inserts.

Landscapes

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

Claims (10)

  1. Boîtier d'étage de construction en plusieurs parties pour être utilisé dans des pompes centrifuges dans lequel est placé un insert (9) qui dirige le courant dans un boîtier soumis à la pression, insert dont les canaux directeurs (10) ouverts sont recouvrables par un élément annulaire (6, 13), caractérisé en ce que, il l'intérieur d'un élément annulaire (2) de forme tubulaire et résistant à la pression de l'étage, est placé un insert (8) dirigeant le courant et muni de canaux (10) ouverts directeurs de courant et de canaux (11) ouverts de retour et en ce que des éléments (6, 13) ressemblant à des membranes et en forme d'anneau de cercle sont placés à l'intérieur de l'élément annulaire (2) et posés sur les canaux directeurs (10) et/ou sur les canaux de retour (11) pour les recouvrir.
  2. Boîtier d'étage selon la revendication 1 caractérisé en ce que les éléments (6, 13) ressemblant à des membranes ont la forme de pièces préformées en tôle.
  3. Boîtier d'étage selon les revendications 1 et 2 caractérisé en ce que les éléments ressemblant à des membranes (6, 13) sont placés à l'intérieur d'un élément annulaire (2) de forme tubulaire pour l'étanchéiser.
  4. Boîtier d'étage selon les revendications 1 et 2 caractérisé en ce que les éléments (6, 13) ressemblant à des membranes sont placés entre les éléments annulaires (2) de forme tubulaire pour les étanchéiser.
  5. Boîtier d'étage selon l'une des revendications 1 à 4 caractérisé en ce que l'un des éléments (6) ressemblant à une membrane présente un gradin formé (16) sur le petit diamètre pour former un joint annulaire à fente pour une roue (17) plongée dedans.
  6. Boîtier d'étage selon l'une des revendications 1 à 5 caractérisé en ce que deux éléments ressemblant à une membrane (6, 13) sont reliés entre eux de manière indissociable.
  7. Boîtier d'étage selon la revendication 6 caractérisé en ce qu'un élément ressemblant à une membrane (13) est fixé de manière indissociable au gradin (16) formé de l'élément (6) voisin ressemblant à une membrane.
  8. Boîtier d'étage selon au moins une des revendications 1 à 7 caractérisé en ce qu'un élément (13) ressemblant à une membrane recouvrant les canaux (10) de la roue est muni d'ouvertures (15) de compensation de la pression placées dans la zone de la roue.
  9. Boîtier d'étage selon la revendication 8 caractérisé en ce que l'élément (6) ressemblant à une membrane est compressible par la pression d'un boîtier d'étage situé en aval contre les canaux (11) ouverts de retour à l'insert (8) directeur de courant.
  10. Boîtier d'étage selon une ou plusieurs des revendications 1 à 9 caractérisé en ce que l'insert (8) directeur de courant transmet la force axiale correspondante de la pression différentielle de l'étage dans l'élément annulaire (2).
EP93114584A 1992-09-14 1993-09-10 Carter d'etage en plusieurs parties Expired - Lifetime EP0588258B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4230713A DE4230713A1 (de) 1992-09-14 1992-09-14 Mehrteiliges Stufengehäuse
DE4230713 1992-09-14

Publications (2)

Publication Number Publication Date
EP0588258A1 EP0588258A1 (fr) 1994-03-23
EP0588258B1 true EP0588258B1 (fr) 1995-11-22

Family

ID=6467917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114584A Expired - Lifetime EP0588258B1 (fr) 1992-09-14 1993-09-10 Carter d'etage en plusieurs parties

Country Status (3)

Country Link
EP (1) EP0588258B1 (fr)
DE (2) DE4230713A1 (fr)
ES (1) ES2082568T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29513904U1 (de) * 1995-08-30 1997-01-09 Sihi GmbH & Co KG, 25524 Itzehoe Seitenkanalkreiselpumpe mit Stufenpaketen in Blechkonstruktion
JP3352924B2 (ja) * 1997-09-30 2002-12-03 株式会社荏原製作所 流体機械
DE19822923A1 (de) * 1998-05-22 1999-11-25 Ksb Ag Leiteinrichtung
JP4593962B2 (ja) * 2004-04-26 2010-12-08 株式会社荏原製作所 遠心ポンプ、及び遠心ポンプの製造方法
EP2143953B1 (fr) 2008-07-10 2011-06-15 Grundfos Management A/S Groupe motopompe

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE62273C (de) * A. C. RENKE in Hannover, Haller Strafse 2,9 Teigteilmaschine mit einstellbarer Pressung und zwangsläufiger Hebelausrückung
DE323630C (de) * 1919-10-14 1920-07-30 Wilhelm Klein F Leitvorrichtung fuer Kreiselpumpen u. dgl.
DE744266C (de) * 1940-10-20 1944-01-13 Klein Hochdruck-Gliederkreiselpumpe
DE964020C (de) * 1950-02-28 1957-05-16 Klein Schanzlin & Becker Ag Gehaeuse von Kreiselmaschinen fuer heisse Arbeitsmittel
AT258124B (de) * 1964-06-24 1967-11-10 Garvenswerke Pumpen Motoren Un Mehrstufige Kreiselpumpe, insbesondere Unterwasserkreiselpumpe
US3438329A (en) * 1967-06-13 1969-04-15 Fairbanks Morse Inc Multistage hydraulic pump having improved diffuser means
DE2458014C3 (de) * 1974-12-07 1981-12-03 Nevskij mašinostroitel'nyj zavod imeni V.I. Lenina, Leningrad Stator eines Mehrstufen-Radialverdichters
CS179716B1 (en) * 1975-10-07 1977-11-30 Bronislav Bagar Multistage centrifugal pump
AT369515B (de) * 1979-06-12 1983-01-10 Garvenswerke Pumpen Motoren Un Pumpe und verfahren zum einbau eines dichtringes in eine pumpe
DD145944A1 (de) * 1979-09-07 1981-01-14 Friedbert Boekel Leit-und rueckfuehreinrichtung fue mehrstufige kreiselpumpen
DE3315350C2 (de) * 1983-04-28 1985-10-03 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Leitrad für Kreiselpumpen
SU1399513A1 (ru) * 1986-03-27 1988-05-30 Войсковая Часть 74242 Направл ющий аппарат центробежного насоса
US5256033A (en) * 1990-11-25 1993-10-26 Ebara Corporation Sheet metal interstage casing for a pump
US5318403A (en) * 1990-12-25 1994-06-07 Ebara Corporation Interstage casing for a pump made of sheet metal and method of manufacturing the same

Also Published As

Publication number Publication date
ES2082568T3 (es) 1996-03-16
EP0588258A1 (fr) 1994-03-23
DE59301000D1 (de) 1996-01-04
DE4230713A1 (de) 1994-03-17

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