WO1995030092A1 - Pompe centrifuge multicellulaire a auto-amorçage - Google Patents

Pompe centrifuge multicellulaire a auto-amorçage Download PDF

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Publication number
WO1995030092A1
WO1995030092A1 PCT/EP1995/001355 EP9501355W WO9530092A1 WO 1995030092 A1 WO1995030092 A1 WO 1995030092A1 EP 9501355 W EP9501355 W EP 9501355W WO 9530092 A1 WO9530092 A1 WO 9530092A1
Authority
WO
WIPO (PCT)
Prior art keywords
stage
pump
suction
chamber
centrifugal pump
Prior art date
Application number
PCT/EP1995/001355
Other languages
German (de)
English (en)
Inventor
Jean-François Fragnet
Jean-Pierre Paget
Original Assignee
Ksb Aktiengesellschaft
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 Aktiengesellschaft filed Critical Ksb Aktiengesellschaft
Priority to AU24059/95A priority Critical patent/AU2405995A/en
Publication of WO1995030092A1 publication Critical patent/WO1995030092A1/fr

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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/005—Priming of not self-priming pumps by adducting or recycling liquid

Definitions

  • the invention relates to a centrifugal pump of the type referred to in the preamble of claim 1.
  • a self-priming, multi-stage centrifugal pump is manufactured and offered by the applicant, KSB Pump Catalog 93/94, Building Technology, Edition 01.01.1993, No. 20, trade name ROVEX 800 P, which has a stage housing arranged horizontally in a pump housing. This pump is self-priming up to 7 m.
  • the known systems generate an underpressure in an internal circuit by a backflow of the delivery liquid from the pressure side to the suction side in the suction chamber and in the suction line.
  • the pressure difference created in this way between the atmospheric pressure in the pressure line and the negative pressure in the suction line increases continuously.
  • the water in the suction line rises to the pump and fills it completely.
  • the housing part is filled with conveying liquid as far as possible before the start of the suction process and then connected to the pressure and suction line.
  • the fill level then corresponds to the lower edge of the intake manifold. The pump is then switched on.
  • the internal circuit of the centrifugal pump necessary for venting the suction line runs through a suction chamber and the first pump stage is then led via all subsequent pump stages into a pressure chamber serving for gas separation.
  • the water is then injected into the suction mouth of the impeller of the first stage via the outer chamber already mentioned and via a guide containing an intake valve.
  • the first pump stage draws in both gas and liquid.
  • the air-water mixture enters the pressure chamber via the various hydraulic pump stages, where the flow is slowed down and the air separates from the water.
  • the water flows through the chamber and the opened suction valve back to the suction chamber, the air flows into the open pressure line.
  • the invention has for its object to provide a self-priming multi-stage centrifugal pump which has an improved suction behavior.
  • a device is arranged in the region between the suction region of the first pump stage and a pressure line connected to a pressure port, which prevents the inflow of gas from the pressure region into the suction region of the suction process prevented.
  • a space-saving arrangement of the device consists in the attachment of a non-return element in the area of the pressure port.
  • the solution according to the invention is in principle applicable to all self-priming multi-stage centrifugal pumps.
  • the suction valve is arranged at a different location, so that the chamber is connected to the suction area of a stage of the centrifugal pump following the first pump stage.
  • the internal fluid circuit can start in the second or any subsequent pump stage. It is essential that there is no return to the first pump stage, so that the suction space of the centrifugal pump is not included in the circuit. A break-in of the gas into the partially vented suction line and a consequent failure of the self-priming effect is effectively countered without additional fittings.
  • Fig. 1 shows a longitudinal section through a known centrifugal pump assembly
  • Fig. 2 shows a longitudinal section through a centrifugal pump unit according to the invention.
  • the known unit shown in FIG. 1 consists of a centrifugal pump 5 equipped with stages 1 to 4 and an electric motor 6 driving it. Each stage 1 to 4 is provided with an impeller 7 which is arranged in a multi-part stage housing 8. A multi-stage housing 9 has been created from the individual stage housings 8 by joining the individual stages together.
  • a partially open disc 16 which supports the separation of the conveying liquid and gas, is arranged.
  • an opening 18 to be closed by a check valve 17 is provided in front of the first stage housing 8, which opening forms the suction valve and via which a connection of the chamber 15 to the suction chamber 13 is established.
  • the check valve 17 consists of a metal plate fixed at only one fastening point, which is held in the open position by its own tension in the unloaded state.
  • a guide component 19 is provided, which has a channel 20, at one end of which the check valve 17 and the opening 18 are arranged, and the other end of which opens into the chamber 13 in the area of the suction mouth of the first impeller 7 .
  • the unit shown in FIG. 2 consists of a centrifugal pump 26 equipped with stages 21 to 25 and an electric motor 27 driving it.
  • the stages 21 to 25, each provided with an impeller 28, are arranged in a multi-stage housing 29 composed of individual multi-part stage housings.
  • the outer housing 30 also includes a suction chamber 33 connected upstream of the first pump stage 21, a pressure chamber 34 serving for gas separation and a housing 29 surrounding the multi-stage housing Chamber 35, the function of which will be discussed in more detail.
  • an opening 38 which can be closed by a check valve 37 and which form an intake valve and via which the chamber 35 is connected to the suction region 39 of the second pump stage 22.
  • the check valve 37 consists of a metal plate fixed at only one fastening point, which is held in the open position in the unloaded state by its inherent tension.
  • the connection of the chamber 35 to the suction area 39 of the second pump stage 22 via an opening 38 could also be carried out in one of the following pump stages 23 to 25.
  • a plate made of another elastic material or a tongue could also be used.
  • a completely differently designed intake valve could also be used.
  • the centrifugal pump 26 In order to be able to start the process of venting the suction line and self-priming, the centrifugal pump 26 must be filled with liquid to such an extent that its impellers 28 are able to carry out an internal circuit. All pump stages 22 to 25 are included in the circuit, with the exception of the first pump stage 21, which first conveys the liquid in the suction chamber 33 into the circuit and is then only available for conveying gas from the suction region 31, 33 of the centrifugal pump 26 .
  • the gas mixed with the circulating liquid, supported by the disk 36 is largely separated in the pressure chamber 34, so that it can escape via the pressure port 32.
  • the liquid passes via the chamber 35, the opened check valve 37 and the opening 38 back into the suction area 39 of the second pump stage 22.
  • the liquid is also enriched with a further gas portion, which flows from the impeller 28 of the first pump stage 21 into the suction area 39 the second pump stage 22 is promoted.
  • the negative pressure created by the progressive evacuation of the suction line causes the water in the suction line to rise.
  • the second pump stage 22 is preferably provided with it in order to obtain a rapid suction process.
  • the A suction device 31, 33 and the pressure area 32 can be arranged which is gas-tight in this direction.
  • a check valve in the area of the pressure port 32 is to be considered. This significantly increases the suction head of conventional centrifugal pumps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une pompe centrifuge (6) multicellulaire à auto-amorçage, qui comprend une chambre (15) située à l'extérieur du carter (9) entourant les cellules de la pompe (1 à 5) et qui contient le liquide à acheminer. Cette chambre (15) est reliée d'une part à la zone d'aspiration de la pompe centrifuge (6), par l'intermédiaire d'un élément antiretour (17) ouvert pendant la phase d'aspiration, et d'autre part à une chambre de compression (14) servant au dégazage. On parvient à un comportement d'aspiration fiable de la pompe centrifuge (6) grâce au fait que dans la zone située entre la zone d'aspiration (11, 13) de la première cellule (1) de la pompe et une conduite de refoulement reliée à un raccord de refoulement (12), il est prévu un dispositif qui empêche le gaz de sortir de la zone de pression pour entrer dans la zone d'aspiration (11, 13) pendant le processus d'aspiration. On parvient à un comportement d'aspiration fiable, sans qu'il soit nécessaire d'ajouter d'autres éléments gênants dans la pompe centrifuge (26), du fait que la chambre (35) est reliée à la zone d'aspiration (39) d'une des cellules (22, 23, 24 ou 25) de la pompe centrifuge (26), succédant à la première cellule (21).
PCT/EP1995/001355 1994-05-02 1995-04-12 Pompe centrifuge multicellulaire a auto-amorçage WO1995030092A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24059/95A AU2405995A (en) 1994-05-02 1995-04-12 Self-priming, multi-stage centrifugal pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4415157.8 1994-05-02
DE4415157A DE4415157A1 (de) 1994-05-02 1994-05-02 Selbstansaugende mehrstufige Kreiselpumpe

Publications (1)

Publication Number Publication Date
WO1995030092A1 true WO1995030092A1 (fr) 1995-11-09

Family

ID=6516885

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/001355 WO1995030092A1 (fr) 1994-05-02 1995-04-12 Pompe centrifuge multicellulaire a auto-amorçage

Country Status (3)

Country Link
AU (1) AU2405995A (fr)
DE (1) DE4415157A1 (fr)
WO (1) WO1995030092A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2119662A1 (es) * 1995-10-10 1998-10-01 Bombas Electricas Sa Electrobomba centrifuga multicelular.
RU2578778C2 (ru) * 2011-03-29 2016-03-27 Грундфос Менеджмент А/С Многоступенчатый центробежный насосный агрегат
TWI612220B (zh) * 2014-12-19 2018-01-21 葛蘭富控股聯合股份公司 自吸泵

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2787525B1 (fr) * 1998-12-21 2002-05-24 Pompes Salmson Sa Pompe horizontale autoamorcante a orifice axial
FR2787526B1 (fr) * 1998-12-21 2001-02-09 Pompes Salmson Sa Clapet d'amorcage pour pompe autoamorcante
DE10239997A1 (de) * 2002-08-27 2004-03-04 Gardena Manufacturing Gmbh Pumpenanordnung
ITPD20050240A1 (it) * 2005-07-29 2007-01-30 Dab Pumps Spa Struttura di pompa idraulica
EP2348219B1 (fr) * 2010-01-25 2016-06-29 Grundfos Management A/S Pompe de liquide de refroidissement
RU2636288C2 (ru) * 2013-05-22 2017-11-21 Грундфос Холдинг А/С Многоступенчатый самовсасывающий центробежный насосный агрегат
DE102013013543B4 (de) 2013-08-13 2023-11-02 Wilo Se Desinfektion in einer Kreiselpumpe oder in einem mindestens eine Kreiselpumpe enthaltenen Pumpensystem
DE102014214805A1 (de) * 2014-07-29 2016-02-04 Ksb Aktiengesellschaft Mantelgehäusepumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR936832A (fr) * 1945-02-03 1948-07-30 Pompe centrifuge multiple à rotors montés en série avec auto-amorçage
DE3539883A1 (de) * 1985-09-18 1987-03-26 Hermetic Pumpen Gmbh Selbstansaugende kreiselpumpe
WO1993014336A1 (fr) * 1992-01-14 1993-07-22 Ksb S.A. Clapet, notamment pour circuit d'amorçage d'une pompe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR936832A (fr) * 1945-02-03 1948-07-30 Pompe centrifuge multiple à rotors montés en série avec auto-amorçage
DE3539883A1 (de) * 1985-09-18 1987-03-26 Hermetic Pumpen Gmbh Selbstansaugende kreiselpumpe
WO1993014336A1 (fr) * 1992-01-14 1993-07-22 Ksb S.A. Clapet, notamment pour circuit d'amorçage d'une pompe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2119662A1 (es) * 1995-10-10 1998-10-01 Bombas Electricas Sa Electrobomba centrifuga multicelular.
RU2578778C2 (ru) * 2011-03-29 2016-03-27 Грундфос Менеджмент А/С Многоступенчатый центробежный насосный агрегат
TWI612220B (zh) * 2014-12-19 2018-01-21 葛蘭富控股聯合股份公司 自吸泵

Also Published As

Publication number Publication date
AU2405995A (en) 1995-11-29
DE4415157A1 (de) 1995-11-09

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