EP0692075A1 - Etage de pompe construit en tole - Google Patents

Etage de pompe construit en tole

Info

Publication number
EP0692075A1
EP0692075A1 EP94910399A EP94910399A EP0692075A1 EP 0692075 A1 EP0692075 A1 EP 0692075A1 EP 94910399 A EP94910399 A EP 94910399A EP 94910399 A EP94910399 A EP 94910399A EP 0692075 A1 EP0692075 A1 EP 0692075A1
Authority
EP
European Patent Office
Prior art keywords
return
stator
section
centrifugal pump
wall
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.)
Withdrawn
Application number
EP94910399A
Other languages
German (de)
English (en)
Inventor
Axel Riel
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 EP0692075A1 publication Critical patent/EP0692075A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4266—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps made of sheet metal

Definitions

  • the invention relates to a centrifugal pump of multi-stage design with pump stages consisting of sheet metal parts, stator and return blades being arranged within one pump stage.
  • a centrifugal pump using such pump stages is known for example from DE-C-1 653 713.
  • the blades are attached to a one-piece, shell-shaped inner jacket with tongues.
  • a two-part outer jacket forms the outer shell of the stator and is arranged within a housing, which is also formed in two parts. Outer jacket and housing parts lie in one plane and are connected to each other by a single weld. For each size and type, components that are perfectly matched to one another must be used.
  • EP-B-0 257 358 shows a multi-part design
  • Stage housing design in radial design The stator blades seem to be attached to the pressure-side partition of the individual pump stages.
  • the return blades are apparently attached to the suction-side partition of the pump stage.
  • This design also requires precisely coordinated parts for each pump size. In addition, this construction can only be produced with complex welding work.
  • the invention is based on the problem of developing a pump stage in sheet metal construction, with which the number of stage housing individual parts is reduced in a pump series and a problem-free adaptation to impellers with different delivery data is possible.
  • the solution to this problem provides a section-shaped stage housing structure, the sections of the stage housing being designed as separate assemblies. A return section and a stator section are inserted into a housing section.
  • the housing section is designed as a pure deep-drawn part, on which no welding work takes place. It only serves as a receptacle for a return section and stator section to be placed therein.
  • the latter two sections are simple welded constructions made up of individual sheet metal parts and lie against one another within the housing section to transmit forces.
  • the housing forces acting in the axial direction are transmitted through wall surfaces of the stator and housing sections running in the axial direction. Likewise, at the points of contact between the individual sections, there is a seal against the medium inside the pump. Due to the separate design of the stator and the return section, it can be easily adapted to the desired system conditions or the desired pump. This means that depending on the impeller used, a suitable stator section can be inserted into the housing section.
  • the downstream return section can also be selected according to the quantity or pressure ratios.
  • Embodiments of the invention provide that the housing section has a fit for a subsequent or previous pump stage.
  • This fitting can advantageously be arranged in the area of the stator inlet diameters. A centering between the individual pump stages is therefore included Possible with the help of the stator section on the housing section.
  • the return section and / or the housing section can have annular shapes for a throttle gap.
  • the formations extend in the axial direction and parallel to one another. It is thus possible in the simplest way to obtain a single or double throttle gap for a neck of an impeller which is immersed in the formations.
  • the housing section has a length with respect to its wall surface extending in the axial direction, which ensures coverage of the sealing gap between the stator and return section in relation to all stator and housing sections used. Furthermore, the housing section has retracted annular wall surfaces in the area of the contact surface of a stator section or return section. This is to ensure that any unevenness in the adjoining section does not cause any leaks between the axial gap between two adjoining sections. The welding points for the blades are then arranged so that they are in the area of the indentation.
  • Fig. 1 shows a section through a multi-stage link pump
  • Fig. 5 shows a stage housing
  • FIG. 1 shows a partial section of a four-stage centrifugal pump.
  • An inlet housing and a pressure housing that discharges the pumped medium have been omitted for clarity. Furthermore, the structure of the first stage was shown hatched for visual emphasis.
  • a total of four impellers 4 are attached to a shaft 1 with the interposition of spacer sleeves 2 and a bearing bush 3.
  • Each impeller is surrounded by a stage housing 5, each stage housing consisting of a total of three sections.
  • a return section 7 and stator section 8 designed as an independent assembly are inserted into a housing section 6, which is designed as a pure sheet metal part.
  • the housing section 6 is of a pot-shaped design. In the area of a stator inlet diameter D, a fitting 9 is provided for connection to a downstream stage housing. This fitting 9 is followed by a formation 10 on a smaller diameter, the diameter of which has been chosen so that an impeller neck 11 can dip into the formation 10 to form a split ring seal 12.
  • the housing section 6 also has an axial wall surface 13, which serves to receive a return section 7 pressed into the housing section 6. For this reason, the return wall 14 of the return section 7 has the outer diameter an axial wall surface part 15, which is arranged sealingly within the axial wall surface part 13 of the housing section 6.
  • an axial wall surface part is provided as a formation 16 on the inner diameter of the return wall 14, which then forms a double split ring seal 12 together with the impeller neck 11 and the formation 10 of the housing section 6. Whether a single or double split ring seal 12 is used in the pump depends on the intended use.
  • Return blades 17 are also attached to the return wall 14.
  • An edge 18 for transmitting axial compressive forces is also formed on the wall surface part 15. This lies sealingly and pressure-transmitting on the bottom of the housing section 6.
  • stator section 8 is also cup-shaped, a shape 19 attached to its bottom surface engaging in the fit 9 of the housing section 6 in a centering manner.
  • stator vanes 21 At the bottom of the stator section 8, which can also be viewed as a radially extending stator wall 20, stator vanes 21 pointing inwards are arranged.
  • the stator blades 21 are covered by an axial wall surface part 22 arranged on the outer diameter of the stator wall 20, the edge 23 of which rests on the return wall 14 in a force-transmitting manner.
  • the wall surface part 22 transfers the conveying medium emerging from the stator into the bladed part of the return section 7.
  • a wall disc 24 of the stator section 8 covers the stator blades 21 in the direction of the return section. It can be seen from the first pump stage that this wall disk 24 is provided in the area of the pump shaft 1 with a receptacle 25 for fastening a bearing 26. Corresponding training can also be carried out in subsequent pump stages in accordance with the number of pump stages used.
  • the return section 7 itself has a wall disk 27 which, in the example shown here, covers the return blade area which is opposite the stator blade area. A reversal is also easily possible. Then the wall plate 24 would only cover the return blades and would be part of the return section 7. The stator blades would then only be covered by an annular disc.
  • the bottom surface of the housing section has a retracted annular wall surface part 28.
  • the stator blades holding position in their position are then all arranged in the region of this retracted wall surface part.
  • the housing section 6, the return section 7 and the stator section 8 are each shown as individual parts.
  • the axial wall surface part 13 of the housing section 6 is always longer than the longest wall surface part 15 of a return section 7. This ensures that the stator section 8 is always sealingly guided with its wall surface part 22 in the housing section 6.
  • a composite stage housing 5 is shown.
  • the connection of the stage housing to one another takes place by the engagement of the formation 19 in the fitting 9 of the return section 7.
  • An impeller 4 shown in dashed lines is inserted from below into the stage housing in the sense of the illustration chosen here.

Landscapes

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

Abstract

L'invention concerne une enveloppe d'étage formant une section, construite en tôle, pour pompes centrifuges. Dans une section enveloppe (6) réalisée sous la forme d'une pièce profilée en tôle, les sections des aubes directrices (8) et les sections de réinjection (7) réalisées sous forme de pièces profilées soudées en tôle sont disposées d'une façon hermétique et assurant la transmission des contraintes.
EP94910399A 1993-03-31 1994-03-09 Etage de pompe construit en tole Withdrawn EP0692075A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4310466 1993-03-31
DE19934310466 DE4310466A1 (de) 1993-03-31 1993-03-31 Pumpenstufe in Blechbauweise
PCT/EP1994/000724 WO1994023211A1 (fr) 1993-03-31 1994-03-09 Etage de pompe construit en tole

Publications (1)

Publication Number Publication Date
EP0692075A1 true EP0692075A1 (fr) 1996-01-17

Family

ID=6484324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94910399A Withdrawn EP0692075A1 (fr) 1993-03-31 1994-03-09 Etage de pompe construit en tole

Country Status (4)

Country Link
EP (1) EP0692075A1 (fr)
AU (1) AU6283694A (fr)
DE (1) DE4310466A1 (fr)
WO (1) WO1994023211A1 (fr)

Families Citing this family (8)

* 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
DE19607292C2 (de) * 1996-02-27 2000-06-08 Grundfos A S Bjerringbro Gehäuse mit Leitapparat für eine Pumpenstufe einer mehrstufigen Kreiselpumpe
DE10158185B4 (de) * 2000-12-20 2005-08-11 Semikron Elektronik Gmbh Leistungshalbleitermodul mit hoher Isolationsfestigkeit
DE10063714C2 (de) * 2000-12-20 2002-11-07 Semikron Elektronik Gmbh Leistungshalbleitermodul mit hoher Isolationsfestigkeit
DE10126488A1 (de) * 2001-05-31 2002-12-05 Ksb Ag Stufengehäuse in mehrteiliger Blechbauweise
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
CN100365289C (zh) * 2006-03-03 2008-01-30 江苏大学 一种叶轮自身平衡轴向力的多级离心泵
DE102007012661B4 (de) * 2007-03-16 2011-06-22 Trautmann, Christian, Dr. Ing., 69257 Tauchpumpenaggregat

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2753807A (en) * 1952-01-21 1956-07-10 Tait Mfg Co The Centrifugal pump and method of manufacture therefor
SU643667A1 (ru) * 1977-01-03 1979-01-25 Специальное Конструкторско-Технологическое Бюро Герметичных И Скважинных Насосов Многоступенчатый центробежный насос
DD145944A1 (de) * 1979-09-07 1981-01-14 Friedbert Boekel Leit-und rueckfuehreinrichtung fue mehrstufige kreiselpumpen
IT8030902V0 (it) * 1980-12-29 1980-12-29 Lowara Spa Contenitore per stadio di pompa multistadio.
SU1307935A1 (ru) * 1985-08-13 1988-01-30 Предприятие П/Я В-8721 Многоступенчатый насос
DE3729673A1 (de) * 1987-09-04 1989-03-23 Grundfos Int Mehrstufige kreiselpumpe
SU1608367A1 (ru) * 1987-12-30 1990-11-23 Предприятие П/Я М-5356 Многоступенчатый секционный центробежный насос
DE3816280C2 (de) * 1988-05-12 1997-03-20 Klein Schanzlin & Becker Ag Gehäuseteil für Kreiselpumpen
SU1733697A1 (ru) * 1988-12-15 1992-05-15 В.И.Козловский , Погружной центробежный насос
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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9423211A1 *

Also Published As

Publication number Publication date
WO1994023211A1 (fr) 1994-10-13
DE4310466A1 (de) 1994-10-06
AU6283694A (en) 1994-10-24

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