EP0646729B1 - Diffuseur en forme de pièce en tÔle - Google Patents

Diffuseur en forme de pièce en tÔle Download PDF

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Publication number
EP0646729B1
EP0646729B1 EP94113252A EP94113252A EP0646729B1 EP 0646729 B1 EP0646729 B1 EP 0646729B1 EP 94113252 A EP94113252 A EP 94113252A EP 94113252 A EP94113252 A EP 94113252A EP 0646729 B1 EP0646729 B1 EP 0646729B1
Authority
EP
European Patent Office
Prior art keywords
blades
sheet metal
blade
welding
diffuser device
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
EP94113252A
Other languages
German (de)
English (en)
Other versions
EP0646729A1 (fr
Inventor
Oliver Schuster
Axel Kott
Kurt Seitz
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 EP0646729A1 publication Critical patent/EP0646729A1/fr
Application granted granted Critical
Publication of EP0646729B1 publication Critical patent/EP0646729B1/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
    • F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers

Definitions

  • the invention relates to a guide device for centrifugal pumps of a multi-stage design, the blades of the guide device being designed as sheet metal parts.
  • DE-PS 16 53 713 shows the structure of such a guide device using the example of a semi-axial pump stage design.
  • the stator and return blades merge directly into one another and are designed as one-piece components that must be attached between an inner and outer casing.
  • This common design is also used in EP 0 257 358 B1, in which separate stator and return blades are used. These blades are also attached as individual elements between associated cover disks and connected to them, here in the form of a welded connection. Disadvantages in the manufacture of such guide devices are their filigree structure and the effort in terms of handling and guiding the individual blade elements.
  • DE-A-40 08 216 relates to a method for producing blades.
  • a large number of blades are punched out of a circuit board, these blades remaining connected to a carrier by connecting webs.
  • a vane star is created that can be permanently connected to cover disks by welding. Laser welding is mentioned as the type of welding.
  • JP-A-2 005 798 shows a feedback device made of plastic. After that, a peripheral section of a disk as a blade part appears to have been bent over by approximately 150 °. Such a manufacturing process is only possible with a thermoplastic material under the influence of heat.
  • EP-A-310 121 shows a solution corresponding to DE-A-40 08 216. Welding bosses are attached to the cover plates to connect the blade parts to the cover plates.
  • the invention is therefore based on the problem of developing an easy-to-assemble design for the guide device of a multi-stage centrifugal pump made in sheet metal construction.
  • the solution to this problem provides that the blades of the guide device are part of a molded sheet metal part, at least two or more blades being bent out of a molded sheet metal part, and that the blades are provided with molded-on welding bosses.
  • This can be a round blank from which the planar developments of the blades are cut out in such a way that the blades are still captively connected to the round blank.
  • the blades are bent out of the flat blank so that they run at an angle to the surface of the blank and form a blade channel between them.
  • the component thus formed which corresponds to a wall surface with blades attached thereon, is easy to handle.
  • the blades are provided with molded welding bosses.
  • These welding bosses which are molded on when the blade development is cut out for the first time, offer the possibility of providing the component thus formed with a cover disk in the simplest manner, or of welding the blades directly onto a housing wall surface.
  • the main advantage of this solution is that the structure thus created is very easy to handle as a large unit and can be welded to another component in a single operation.
  • At least two blades are part of a sheet metal part. From a plate, on the edges of which the blade unions corresponding to their later assembly position are formed by two blades, a sheet metal part is created by bending up the edges, in which two blades form a blade channel between them. This results in shaped sheet metal parts, each with two molded blades, which make it possible to construct a guide device by using several of these shaped sheet metal parts. However, this variant is only suitable for guidance devices with an even number of blades. These sheet metal parts can then be attached to a plate, which can be used, for example, as a spatial separation between a guide device with a subsequent return section.
  • Such a device can also be manufactured in the simplest way. Cover disks can then be placed in the simplest manner on the integrally formed welding bosses of the blades are attached or the blades are welded to separating wall surfaces. It is also possible to connect the connecting surfaces located between the individual blades by spot welding to other parts of the guide device or pump housing.
  • the surfaces adjoining the blades are provided with cut-outs for contact surfaces and / or welding bosses molded onto the blades.
  • These welding humps are arranged to a certain extent on the underside of the blade or in the blade root zone. They are aligned with the welding bosses formed on the outer contour of the blade.
  • FIGS. 1 to 5 All representations of FIGS. 1 to 5 are shown using the example of a feedback device.
  • 1 shows a circular sheet-metal blank 1 on which a development of the blades 2 has already been cut out.
  • the blades 2 are each equipped with three welding bosses 3, which allow a connection to a wall surface or a cover plate to be attached to it after a later forming process.
  • the dash-dotted lines 4 form the bending line for the blades 2 to be bent later and the adjoining surfaces 5 correspond to the blade roots.
  • the surfaces forming the blade roots can be connected to the wall surfaces of a step housing or corresponding cover or cutting disks by a simple spot weld connection.
  • FIG. 2 shows the circular blank according to FIG. 1 after a shaping process.
  • the blades 2 are now at an angle to the plane of the drawing and have the three molded-on welding points 3 on their upper side.
  • the blade feet 5 have a width here, which enables problem-free spot welding with other surfaces.
  • FIG. 4 shows a plan view of the sheet metal parts of FIG. 3 with blades 2 bent upward. Between two blades 2 in each case a connecting surface 7 extends, which functionally can take over the function of a blade root.
  • the blades of a guide device thus created can be handled in a very convenient manner and connected to form a uniform, complete guide device. The tools required for this can also be designed very simply and inexpensively and their number can be minimized.
  • these bladed parts can easily be attached by means of the integrally formed welding bosses. It is also easily possible to connect these bladed parts directly to a wall surface of a step housing.

Claims (3)

  1. Equipement de guidage pour des pompes centrifuges du type à plusieurs étages, l'équipement de guidage influençant énergétiquement le milieu d'alimentation sortant d'une turbine, et/ou l'acheminant vers un étage de pompe supplémentaire, et les pales (2) de l'équipement de guidage (1) étant réalisées sous forme de pièces en tôle, les pales (2) de l'équipement de guidage faisant partie d'une pièce en tôle (1, 6), au moins deux ou plusieurs pales (2) étant réalisées par pliage à partir d'une pièce en tôle (1, 6), caractérisé en ce que les pales (2) sont pourvues de bosses de soudure (3) qui y sont façonnées.
  2. Equipement de guidage selon la revendication 1, caractérisé en ce que au moins deux pales (2) sont reliées l'une à l'autre par une surface (5, 7).
  3. Equipement de guidage selon la revendication 1 ou 2, caractérisé en ce que les surfaces (5, 7) jouxtant les pales (2) sont pourvues de découpes de dégagement (8) pour les surfaces du dispositif (9) façonnées sur les pales (2) et/ou de bosses de soudure (10).
EP94113252A 1993-09-06 1994-08-25 Diffuseur en forme de pièce en tÔle Expired - Lifetime EP0646729B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4330098A DE4330098A1 (de) 1993-09-06 1993-09-06 Als Blechformteil ausgebildete Leiteinrichtung
DE4330098 1993-09-06

Publications (2)

Publication Number Publication Date
EP0646729A1 EP0646729A1 (fr) 1995-04-05
EP0646729B1 true EP0646729B1 (fr) 1997-12-03

Family

ID=6496965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113252A Expired - Lifetime EP0646729B1 (fr) 1993-09-06 1994-08-25 Diffuseur en forme de pièce en tÔle

Country Status (3)

Country Link
EP (1) EP0646729B1 (fr)
DE (2) DE4330098A1 (fr)
DK (1) DK0646729T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346058A1 (de) * 2003-10-04 2005-04-21 Ksb Ag Kreiselpumpen-Leitrad
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
FR2879265A1 (fr) * 2004-12-10 2006-06-16 Pompes Salmson Sa Diffuseur de pompe multicellulaire et son procede d'assemblage
CN100404874C (zh) * 2006-01-21 2008-07-23 阳江市新力工业有限公司 一种冲压焊接食品泵
CN101737351A (zh) * 2008-11-20 2010-06-16 上海连成（集团）有限公司 新型带流道式导叶的双吸泵
CN102852805B (zh) * 2011-06-27 2015-09-02 王喜冬 硬质合金可空转可串联水陆两用矿用立泵
CN110319025B (zh) * 2018-03-29 2024-04-09 王喜冬 两栖式可空转矿用立泵
CN110319023B (zh) * 2018-03-29 2024-04-09 王喜冬 两栖式可空转矿用立泵
CN110319024B (zh) * 2018-03-29 2024-04-09 王喜冬 两栖式可空转矿用立泵

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7246480U (de) * 1973-08-02 Baeker G Aus Blechteilen zusammengesetztes Flügelrad für Kreiselpumpen
DE368563C (de) * 1923-02-06 Adolf Gustav Von Loewe Dipl In Aus einem Stueck Blech gestanzter und gepresster Schaufelkranz fuer Lauf- und Leitraeder von Turbinen und Turbogeblaesen
US2753807A (en) * 1952-01-21 1956-07-10 Tait Mfg Co The Centrifugal pump and method of manufacture therefor
US3189982A (en) * 1961-10-03 1965-06-22 Torrington Mfg Co Method of making integral fan and slinger ring
US3362338A (en) * 1965-01-28 1968-01-09 Armstrong Ltd S A Impellers for centrifugal pumps
SE451620B (sv) * 1983-03-18 1987-10-19 Flaekt Ab Forfarande for framstellning av ledskenekrans for aterstromningskanal vid axialflektar
JPS61210299A (ja) * 1985-03-13 1986-09-18 Fuji Electric Co Ltd 遠心送風機のデイフユ−ザ
IT209616Z2 (it) * 1986-08-08 1988-10-24 Lowara Spa Anello di tenuta idraulica sulla bocca della girante in pompe mono e pluristadio.
EP0310121B1 (fr) * 1987-09-30 1992-06-17 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Procédé de fabrication de dispositifs de refoulement et/ou de direction pour machines à écoulement et impulseur radial réalisé selon ce procédé, en particulier impulseur de fluide de refroidissement pour moteurs à combustion
JPH025798A (ja) * 1988-06-24 1990-01-10 Fuji Electric Co Ltd 多段遠心形流体機械のディフューザ
DE4005640A1 (de) * 1990-02-22 1991-08-29 Klein Schanzlin & Becker Ag Spiralgehaeuse in blechbauweise
DE4008216A1 (de) * 1990-03-15 1991-09-19 Grundfos Int Verfahren zur herstellung von fluidfuehrenden einrichtungen
US5256033A (en) * 1990-11-25 1993-10-26 Ebara Corporation Sheet metal interstage casing for a pump
US5234317A (en) * 1990-12-25 1993-08-10 Ebara Corporation Sheet metal interstage casing for a pump
DE4101868A1 (de) * 1991-01-23 1992-07-30 Hilge Philipp Gmbh Laufrad fuer kreiselpumpen

Also Published As

Publication number Publication date
DE59404713D1 (de) 1998-01-15
EP0646729A1 (fr) 1995-04-05
DE4330098A1 (de) 1995-03-09
DK0646729T3 (da) 1998-08-10

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