EP2359009B1 - Ouverture de décharge réductible - Google Patents

Ouverture de décharge réductible Download PDF

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Publication number
EP2359009B1
EP2359009B1 EP09774627A EP09774627A EP2359009B1 EP 2359009 B1 EP2359009 B1 EP 2359009B1 EP 09774627 A EP09774627 A EP 09774627A EP 09774627 A EP09774627 A EP 09774627A EP 2359009 B1 EP2359009 B1 EP 2359009B1
Authority
EP
European Patent Office
Prior art keywords
impeller
inserts
pressure
centrifugal pump
sleeve
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.)
Not-in-force
Application number
EP09774627A
Other languages
German (de)
English (en)
Other versions
EP2359009A1 (fr
Inventor
Arno Krauss
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 EP2359009A1 publication Critical patent/EP2359009A1/fr
Application granted granted Critical
Publication of EP2359009B1 publication Critical patent/EP2359009B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/501—Elasticity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/518—Ductility

Definitions

  • the invention relates to a centrifugal pump one or more stages with arranged in the pump housing, driven impeller or impellers, a shaft seal and wherein at least one cover plate of at least one impeller one or more adjustable discharge openings are arranged.
  • centrifugal pumps the resultant of the axial forces acting on a pump impeller is referred to as the axial thrust.
  • Their exact determination is described in the KSB centrifugal pumps Lexikon, 3rd edition, under the keyword "axial thrust" on pages 32 ff.
  • axial thrust In single-stage centrifugal pumps, an axial force relief with discharge openings in a pressure-side impeller cover disc has proven to be the frequent measure.
  • the arrangement of the relief openings is also in combination with additional sealing gaps and housing ribs or impeller blades.
  • a comparable solution shows the SU A 523 994 in which such adjustability of the discharge openings takes place on an open impeller, but on the rear side in an analogous manner.
  • centrifugal pumps regardless of whether they are single-stage or multi-stage, one or more impellers, in most cases a shaft seal and a bearing carrier, are arranged downstream.
  • the discharge openings for the axial thrust are usually selected so large that a residual residual axial thrust can be easily absorbed by the shaft bearings. Its magnitude is below a permissible axial bearing load of the bearing.
  • one or more sleeve-shaped inserts is or are arranged in one or more discharge openings.
  • the arranged in the normal Axialschubaus convincedsö Maschinenen the impeller sleeve-shaped and flow-through inserts have a smaller cross-sectional area of the flow area. This results in a precise throttling of a return flow from the impeller side space back into the suction of the impeller.
  • a pressure increase which in turn results in a defined contact pressure of a shaft seal.
  • the latter for example, the sliding ring of a loaded mechanical seal, even with fluctuating operating conditions always with a sufficiently high pressure safely and sealingly pressed against the mating ring.
  • Embodiments provide that the insert is formed as a clamping sleeve and is held elastically deformable in a discharge opening.
  • inserts For centrifugal pumps with metal and / or plastic impellers arranged therein, inserts have proved to be advantageous, which are equipped with a radially projecting collar. These sleeve-shaped inserts are used in the manner of hollow rivets as needed in standardized relief openings and held therein by plastic deformation or frictional engagement.
  • the pump housing with the pump impeller arranged therein is followed by a kind of thermal barrier.
  • This provides a longer shaft, which is guided within a longer and thin-walled shaft housing and held in a spaced bearing support with and between the bearings arranged mechanical seal.
  • the heat transfer between the pump housing and bearing carrier is reduced.
  • By additionally held in the relief openings throttling inserts behind the impeller creates a higher pressure.
  • This higher pressure arises along the shaft also in the sealing space of the bearing carrier and always requires there a defined load on the shaft seal.
  • Several inserts with different diameters can also be arranged inserted one inside the other. With this measure, a targeted adaptation of an axial thrust or its compensation can be achieved. For example, if the system, operating conditions or operating conditions change for a centrifugal pump.
  • the Fig. 1 shows a centrifugal pump impeller radial and closed type.
  • the impeller 1 receiving housing as well as the impeller 1 via a hub 2 driving shaft and a shaft seal was omitted for reasons of clarity.
  • Trained as a casting impeller 1 has a pressure-side impeller cover 3, which is provided in the transition region to the hub 2 with a plurality of evenly distributed on a diameter arranged discharge openings 4. These are often designed as holes.
  • a fluid conveyed by the impeller 1 flows from the impeller inlet 5 through the blade channels 7 bounded by blades 6 to the impeller outlet 8 and flows into the interior of a housing.
  • the pressure prevailing at the impeller outlet 8 acts and exerts a force in the axial direction both on the pressure-side impeller cover disk 3 and on the opposite intake-side impeller cover disk 9.
  • a resulting axial force As a result of the different size of the surfaces of the impeller cover discs resulting from the pressure acting thereon, a resulting axial force. With a wrong interpretation of the conditions, this will have negative effects on the bearings of a shaft driving the impeller.
  • An impeller 1 is usually provided with a suction side gap surface 10 and pressure side gap surface 11, which are arranged opposite stationary housing cleavage surfaces, thus forming gap seals between stationary and rotating parts.
  • a gap surface 11 for a gap seal is arranged by way of example.
  • a fluid located on the pressure side DRS flows through the relief openings 4 back into the region of the impeller inlet 5 and the region of the inlet edges of the blades 6, where there is a low inlet pressure.
  • the sum of the cross section of the individual discharge openings 4 is chosen so large that it ensures a defined remaining residual axial thrust. Whose size should not exceed the permissible bearing load of arranged in a bearing carrier bearings in all possible operating conditions.
  • the number of relief openings 4 is usually dependent on the number of blades used an impeller 1 and the consequent number of blade channels.
  • one of these relief openings 4 is shown in section and is located above the hub 2.
  • the relief hole 4 corresponds to the cross section and the number forth a design state of the pump.
  • at least one sleeve-shaped insert 12 which reduces the cross-section, is arranged in one or more relief openings 4. This can be a pressed-in bushing or an elastically deformable clamping sleeve, clamping sleeve, clamping pin or an analogously acting machine element.
  • Such a throttling insert can be installed at a final assembly of the pump in a factory, if the exact operating conditions for a pumped fluid of the pump are known. Likewise, an axial thrust adjustment by retrofitting or disassembly of one or more inserts 12 can easily take place at a later installation location of the pump.
  • spring-trained clamping sleeves have proven that can be used in the simplest way in existing relief openings 4. Due to the elastic shape change of the inserts 12 they are at a mounting elastically reduced in diameter and held by their residual stress safely in the relief hole 4.
  • the Fig. 2 shows a similar, but designed as a sheet metal part impeller 1.
  • plastically deformable sleeves 13 are used.
  • sleeves 13 proved to be advantageous because they are simply used in such relief openings and held by the collar 14.
  • the other sleeve end 15 can be widened and thus the sleeve 13 can be securely fixed in the impeller 1. This can be done with the aid of a riveting or crimping tool, whereby one or both ends of the sleeve 13 are reshaped.
  • a sleeve 13 may also be an elastic deformable sleeve 12, as shown in FIG Fig. 1 is shown, additionally arranged, so as to further restrict the flow area.

Landscapes

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

Claims (5)

  1. Pompe centrifuge de type à un ou plusieurs étages, comprenant une roue mobile ou des roues mobiles entraînées et disposées dans le carter de pompe, et une étanchéité d'arbre, et dans laquelle, au niveau d'au moins un disque de recouvrement d'au moins une roue mobile, sont disposées une ou plusieurs ouvertures de décharge ajustables,
    caractérisée en ce que
    dans une ou plusieurs ouvertures de décharge (4) est ou sont disposés un ou plusieurs inserts (12, 13) en forme de douille.
  2. Pompe centrifuge selon la revendication 1, caractérisée en ce que l'insert (12) est réalisé sous forme de douille de serrage et est maintenu de manière élastiquement déformable dans une ouverture de décharge (4).
  3. Pompe centrifuge selon la revendication 1 ou 2, caractérisée en ce que des douilles munies d'au moins un épaulement saillant radialement (4) sont disposées en tant qu'inserts dans des pompes centrifuges avec des roues mobiles en tôle et/ou en plastique (4).
  4. Pompe centrifuge selon la revendication 3, caractérisée en ce que les inserts (13) sont maintenus de manière déformable plastiquement.
  5. Pompe centrifuge selon l'une quelconque des revendications 1 à 4, caractérisée en ce que plusieurs inserts (12, 13) sont disposés de manière enfichée les uns dans les autres.
EP09774627A 2008-12-16 2009-12-01 Ouverture de décharge réductible Not-in-force EP2359009B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008062584A DE102008062584A1 (de) 2008-12-16 2008-12-16 Reduzierbare Entlastungsöffnung
PCT/EP2009/008531 WO2010072307A1 (fr) 2008-12-16 2009-12-01 Ouverture de décharge réductible

Publications (2)

Publication Number Publication Date
EP2359009A1 EP2359009A1 (fr) 2011-08-24
EP2359009B1 true EP2359009B1 (fr) 2012-09-19

Family

ID=41674168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09774627A Not-in-force EP2359009B1 (fr) 2008-12-16 2009-12-01 Ouverture de décharge réductible

Country Status (5)

Country Link
EP (1) EP2359009B1 (fr)
CN (1) CN102245904A (fr)
DE (1) DE102008062584A1 (fr)
DK (1) DK2359009T3 (fr)
WO (1) WO2010072307A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110925244A (zh) * 2019-12-13 2020-03-27 徐亮 一种带有轴向力平衡管结构的低噪声屏蔽泵

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026132A1 (de) * 2010-07-05 2012-01-05 Mahle International Gmbh Laufrad und Fluidpumpe
CN109723668B (zh) * 2018-12-23 2023-04-07 无锡市华冷机械有限公司 一种便于拆卸的矿用泵叶轮
DE102023110014A1 (de) 2023-04-20 2024-10-24 Bühler Motor GmbH Laufrad für eine fluidpumpe und verfahren zu dessen herstellung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4938641B1 (fr) * 1970-08-06 1974-10-19
SU383892A1 (ru) 1971-03-04 1973-05-23 Кишиневский завод герметических насосов М. В. Фрунзе Лрпастная машина
DE7132016U (de) * 1971-08-21 1973-03-08 Klein Schanzlin & Becker Ag Mehrstufige kreumpe mit selbsttaetigem axialschubausgleic
SU523994A1 (ru) 1974-11-05 1976-08-05 Предприятие П/Я В-8721 Лопастна машина
DE2640990A1 (de) * 1976-09-11 1978-03-16 Klein Schanzlin & Becker Ag Kreiselpumpe mit selbsttaetiger axialschubregelung an einem der laufraeder
DE8707360U1 (de) * 1987-05-22 1987-07-09 Deutsche Vortex GmbH, 7140 Ludwigsburg Läufer für einen Elektromotor
JP3537349B2 (ja) * 1998-04-20 2004-06-14 日機装株式会社 スラストバランス装置
CN2713185Y (zh) * 2004-07-22 2005-07-27 薛肇江 电动燃油叶轮泵叶轮
CN2742199Y (zh) * 2004-09-30 2005-11-23 上海东方泵业(集团)有限公司 叶轮轴向间隙调整装置
CN2929259Y (zh) * 2006-07-15 2007-08-01 李琢书 叶轮泵

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110925244A (zh) * 2019-12-13 2020-03-27 徐亮 一种带有轴向力平衡管结构的低噪声屏蔽泵

Also Published As

Publication number Publication date
WO2010072307A1 (fr) 2010-07-01
DE102008062584A1 (de) 2010-06-17
EP2359009A1 (fr) 2011-08-24
CN102245904A (zh) 2011-11-16
DK2359009T3 (da) 2013-01-02

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