EP0528845A1 - Roue a aube pour pompes centrifuges. - Google Patents

Roue a aube pour pompes centrifuges.

Info

Publication number
EP0528845A1
EP0528845A1 EP91908572A EP91908572A EP0528845A1 EP 0528845 A1 EP0528845 A1 EP 0528845A1 EP 91908572 A EP91908572 A EP 91908572A EP 91908572 A EP91908572 A EP 91908572A EP 0528845 A1 EP0528845 A1 EP 0528845A1
Authority
EP
European Patent Office
Prior art keywords
blade
paddle wheel
angle
degrees
wheel according
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
EP91908572A
Other languages
German (de)
English (en)
Other versions
EP0528845B1 (fr
Inventor
Wolfgang Metzinger
Rolf Witzel
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6406293&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0528845(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KSB AG filed Critical KSB AG
Publication of EP0528845A1 publication Critical patent/EP0528845A1/fr
Application granted granted Critical
Publication of EP0528845B1 publication Critical patent/EP0528845B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • F04D29/245—Geometry, shape for special effects

Definitions

  • the invention relates to an impeller for centrifugal pumps for conveying liquids mixed with solid admixtures, in particular for conveying dirty water with long-fiber constituents, with a channel between the front and rear cover plates of the impeller and the blade, the strength of which changes over the extent thereof is formed.
  • centrifugal pumps with paddle wheels are operated at a constant drive speed.
  • the delivery conditions of such a centrifugal pump are usually subject to constant change.
  • the inlet height fluctuates between a maximum and a minimum value.
  • the operating point of the centrifugal pump i.e. the intersection between the constant pump characteristic and the variable system characteristic, is therefore also subject to the change.
  • the shift in the operating point now involves both a change in the relative blade inflow velocity and a change in the relative inflow direction. This results in a static pressure distribution along the blade contour, which is specific for the respective blade shape.
  • the integration of the pressure distribution from the blade inlet to the blade outlet edge results in a blade force that rotates relative to a fixed reference point as a deflecting transverse force.
  • This transverse force which is also referred to as hydrodynamic buoyancy, forms a harmonically acting excitation force, which in a system capable of oscillation, ie, for example, B. a system that can cause major problems. It should therefore be kept as small as possible.
  • the US-PS 17 54 992 deals with the problem of balancing the mass imbalance on a single or single channel.
  • the cited patent provides two measures: First, the blade forming the channel has a continuously decreasing thickness over its extension, so that, despite the asymmetrical mass distribution, an overall relatively low mass unbalance is caused. Second, a counterweight is used on the back of the impeller to balance the mass. As A possible third measure is the arrangement of cavities on the rear side of the paddle wheel, wherein the location can be varied to optimize the unbalance compensation.
  • the object is achieved according to the invention in that the blade angle measured on the skeleton line of the blade is 0 degrees or smaller from the entrance to at least 90 degrees of the angle of rotation, while the blade angle at the outlet is positive.
  • Fig. 1 shows an axial section through an impeller designed according to the invention and in
  • FIG. 2 shows a radial section through the impeller of FIG. 1st
  • the paddle wheel produced by a casting process forms a channel (4) between a front cover plate (1), a rear cover plate (2) and a blade (3), the cross section of which decreases from the inlet (5) of the paddle wheel to the outlet (6).
  • the blade (3) equipped with a suction side (7) and a pressure side (8) has a flattened blade head (9).
  • a stagnation point flow results on a blade head with a very large rounded radius, which has a repellent effect on solids contained in the flow medium.
  • the flattening which in the limit case has an infinitely large rounding radius, prevents the attachment of long-fiber components.
  • the paddle wheel is designed so that the suction side of the paddle forms a semicircle concentrically to the axis of rotation of the paddle wheel for the first 180 degrees of the angle of rotation.
  • the blade angle ⁇ measured from the blade head (9), the entry (5) into the impeller is up to 180 ° of the angle of rotation less than 0 °, measured on the skeleton line (10) of the blade (3). while it is positive at the outlet (6), that is in the area of the blade end (11).
  • the suction side (7) of the blade (3) forms a semicircle with the radius r, which is arranged concentrically to the axis of rotation of the impeller.
  • the blade (3) has a continuously decreasing thickness towards the outlet. It therefore has a mass distribution that is favorable for the imbalance behavior of the impeller. This advantage can be determined for the impeller as a whole, since it does not have large accumulations of material, particularly in the outer circumferential area.
  • the suction side (7) and the pressure side (8) of the blade (3) run axially parallel over their entire extent, with a rounding into the cover disks (1) and (2).
  • the radius of such a rounding corresponds here to approximately one third of the width of the channel (4) at the outlet (6). It can be up to half the channel width at the outlet (6) of the paddle wheel.
  • the paddle wheel according to the invention has a comparatively uncomplicated shape. It is therefore not only easy to pour, it can also be produced in sheet metal construction, which above all brings additional advantages with regard to the unbalance behavior.

Landscapes

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

Abstract

L'invention concerne une roue à aube pour pompes centrifuges destinées à l'extraction de liquides chargés d'impuretés solides, notamment à l'extraction d'eaux polluées chargées de constituants à fibres longues, dans laquelle un canal (4) est formé entre le disque de recouvrement avant (1) et le disque de recouvrement arrière (2) de la roue à aube, et l'aube, dont l'épaisseur varie sur toute son étendue. Outre les exigences courantes formulées pour satisfaire l'absence d'engorgements, l'obtention de valeurs aussi faibles que possible du balourd mécanique et de la poussée hydrodynamique, ainsi que l'obtention d'une réduction considérable de la cavitation préjudiciable à la rotation et au refoulement, l'invention prévoit que l'angle (beta) mesuré sur la ligne médiane (11) de l'aube (3), à partir de l'entrée (5) jusqu'à au moins 90 degrés de l'angle de rotation, est égal ou inférieur à 0 degré, tandis que l'angle de l'aube (beta) à la sortie (6) est positif.
EP91908572A 1990-05-12 1991-05-02 Roue a aube pour pompes centrifuges Expired - Lifetime EP0528845B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4015331 1990-05-12
DE4015331A DE4015331A1 (de) 1990-05-12 1990-05-12 Einschaufelrad fuer kreiselpumpen
PCT/EP1991/000833 WO1991018210A1 (fr) 1990-05-12 1991-05-02 Roue a aube pour pompes centrifuges

Publications (2)

Publication Number Publication Date
EP0528845A1 true EP0528845A1 (fr) 1993-03-03
EP0528845B1 EP0528845B1 (fr) 1995-07-19

Family

ID=6406293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91908572A Expired - Lifetime EP0528845B1 (fr) 1990-05-12 1991-05-02 Roue a aube pour pompes centrifuges

Country Status (5)

Country Link
US (1) US5348444A (fr)
EP (1) EP0528845B1 (fr)
AR (1) AR244396A1 (fr)
DE (2) DE4015331A1 (fr)
WO (1) WO1991018210A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112069630A (zh) * 2020-11-11 2020-12-11 中国航发上海商用航空发动机制造有限责任公司 压气机及叶片、叶片的二维叶型设计方法、计算机设备

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5263924A (en) * 1991-09-25 1993-11-23 Baxter International Inc. Integrated low priming volume centrifugal pump and membrane oxygenator
US5290236A (en) * 1991-09-25 1994-03-01 Baxter International Inc. Low priming volume centrifugal blood pump
US5890883A (en) * 1997-03-19 1999-04-06 The Cleveland Clinic Foundation Rotodynamic pump with non-circular hydrodynamic bearing journal
AU7360798A (en) * 1997-09-24 1999-04-12 Cleveland Clinic Foundation, The Flow controlled blood pump system
JP4713066B2 (ja) * 2003-07-18 2011-06-29 新明和工業株式会社 羽根車及びそれを備えた汚水処理用ポンプ
US7767159B2 (en) * 2007-03-29 2010-08-03 Victor Nikolaevich Glotov Continuous flow sonic reactor and method
JP5118951B2 (ja) * 2007-12-11 2013-01-16 新明和工業株式会社 遠心ポンプ用羽根車及び遠心ポンプ
DE102011007907B3 (de) * 2011-04-21 2012-06-21 Ksb Aktiengesellschaft Laufrad für Kreiselpumpen
WO2013120049A1 (fr) 2012-02-10 2013-08-15 Randy Dixon Pompe à lobes avec lames racleuses
DE102015213451B4 (de) 2015-07-17 2024-02-29 KSB SE & Co. KGaA Kreiselpumpen-Schaufelprofil
CN106837856B (zh) * 2017-03-14 2023-03-31 中交疏浚技术装备国家工程研究中心有限公司 高效耐磨挖泥泵三叶片叶轮设计方法及叶轮
DE102017213507A1 (de) 2017-08-03 2019-02-07 KSB SE & Co. KGaA Laufrad für Abwasserpumpe
DE102017221930A1 (de) 2017-12-05 2019-06-06 KSB SE & Co. KGaA Laufrad für Abwasserpumpe
CN110513326B (zh) * 2019-08-27 2024-04-23 浙江理工大学 一种主动控制压力脉动的离心泵叶轮
CN112483461B (zh) * 2020-10-21 2022-07-22 南通大学 一种单叶片离心泵径向力自平衡的方法
CN112811483B (zh) * 2021-01-06 2022-11-04 江苏大学 一种绿色环保污水处理装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506117A (fr) *
CH94909A (de) * 1921-05-21 1922-06-01 Peter Alfred Kanallose Kreiselpumpe, insbesondere zum Fördern von unreinen Flüssigkeiten mit verschiedenen spezifischen Gewichten.
US1754992A (en) * 1926-12-06 1930-04-15 American Well Works Centrifugal pump
CH189936A (de) * 1936-01-18 1937-03-31 Bucher Guyer Ag Masch Kreiselpumpe zum Fördern von Gülle, Schlammwasser und dergleichen.
US2272469A (en) * 1939-12-23 1942-02-10 Chicago Pump Co Centrifugal pump
DE1034031B (de) * 1956-03-31 1958-07-10 Amag Hilpert Pegnitzhuette A G Kanalrad, insbesondere Einkanalrad fuer Kreiselpumpen zur Foerderung schlammhaltiger Abwaesser
FR1274289A (fr) * 1960-11-29 1961-10-20 Pompe centrifuge comportant un rotor à conduit unique
DE2732863C3 (de) * 1977-07-21 1980-04-17 Balcke-Duerr Ag, 4030 Ratingen Einkanalrad-Kreiselpumpe zur Förderung von Abwässern
US4575312B1 (en) * 1982-06-02 1989-05-16 Impeller
FI73501C (fi) * 1984-06-06 1987-10-09 Sarlin Ab Oy E Loephjul vid en pump.
US4681508A (en) * 1984-11-14 1987-07-21 Kim Choong W Supercavitation centrifugal pump
DE3615686A1 (de) * 1986-05-09 1987-11-12 Klein Schanzlin & Becker Ag Kanalrad fuer kreiselpumpen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9118210A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112069630A (zh) * 2020-11-11 2020-12-11 中国航发上海商用航空发动机制造有限责任公司 压气机及叶片、叶片的二维叶型设计方法、计算机设备
CN112069630B (zh) * 2020-11-11 2021-01-22 中国航发上海商用航空发动机制造有限责任公司 压气机及叶片、叶片的二维叶型设计方法、计算机设备

Also Published As

Publication number Publication date
DE4015331A1 (de) 1991-11-14
US5348444A (en) 1994-09-20
EP0528845B1 (fr) 1995-07-19
AR244396A1 (es) 1993-10-29
DE59106053D1 (de) 1995-08-24
WO1991018210A1 (fr) 1991-11-28

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