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EP0645541B1 - Pompe centrifuge autoamorçante - Google Patents

Pompe centrifuge autoamorçante Download PDF

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Publication number
EP0645541B1
EP0645541B1 EP94114953A EP94114953A EP0645541B1 EP 0645541 B1 EP0645541 B1 EP 0645541B1 EP 94114953 A EP94114953 A EP 94114953A EP 94114953 A EP94114953 A EP 94114953A EP 0645541 B1 EP0645541 B1 EP 0645541B1
Authority
EP
European Patent Office
Prior art keywords
pump
valve
suction
diffuser
impeller
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
EP94114953A
Other languages
German (de)
English (en)
Other versions
EP0645541A1 (fr
Inventor
Manfred Wessel
Karl-Horst Rasche
Ingo Winkelmann
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.)
Asv Stuebbe & Co KG GmbH
Original Assignee
Asv Stuebbe & Co KG GmbH
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 Asv Stuebbe & Co KG GmbH filed Critical Asv Stuebbe & Co KG GmbH
Publication of EP0645541A1 publication Critical patent/EP0645541A1/fr
Application granted granted Critical
Publication of EP0645541B1 publication Critical patent/EP0645541B1/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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/06—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock of jet type

Definitions

  • the invention relates to a self-priming centrifugal pump according to the preamble of claim 1.
  • a liquid propellant which remains in a propellant chamber of the pump housing when the pump is switched off, is pumped by the pump impeller in the circuit from the propellant chamber through the propellant nozzle into the diffuser tube, sucked out of the diffuser tube and conveyed back into the propellant chamber.
  • the propellant jet entering the diffuser tube from the propellant nozzle sucks in the air from the suction line of the pump housing, which can escape from the propellant chamber, for example, through the pressure line of the pump housing that is connected to the propellant chamber.
  • the centrifugal pump builds up its final pumping pressure, by means of which the pumped medium is pressed out of the pressure line of the pump housing connected to the propellant chamber.
  • the dimensioning of the driving nozzle and the diffuser primarily determines the suction power and delivery rate in these known self-priming centrifugal pumps.
  • the propellant nozzle In order to change the suction power of the jet pump device for the air intake and to change the suction and delivery power of the pump for the delivery of the suctioned pumped medium, the propellant nozzle should be able to be changed or adjusted using complex measures and means.
  • the invention has for its object to provide a simple possibility for a change in performance after completion of the startup process in a device of the type mentioned.
  • the invention solves this problem by designing a self-priming centrifugal pump of the type mentioned at the outset with the characterizing features of patent claim 1.
  • the centrifugal pump has in its pump housing 1 a pump chamber 2 which contains the pump impeller 3 rotating about a horizontal axis in the exemplary embodiment and is connected on the pressure side via openings 17 in a partition wall 18 to a propellant space 4 arranged coaxially in the pump housing and thereby also to the propellant space 4 connected pressure line 5 of the pump housing is connected.
  • the pump impeller 3 is preceded coaxially by a jet pump diffuser 6, the enlarged outlet 7 of which in front of the suction opening 8 of the pump impeller 3 opens into the pump chamber 2 and its narrow inlet 9 is connected to the suction line 10 of the pump housing 1.
  • a drive nozzle 11 is arranged in front of the diffuser inlet 9, the mouth of the nozzle within the suction line 10 interacts with the diffuser inlet 9 and is connected to the propellant chamber 4 via an inlet channel 12.
  • a bypass line 13 formed in the pump housing is connected to the suction line 10 of the pump housing 1 and leads directly from the suction line 10, bypassing the diffuser inlet 9 interacting with the driving nozzle 11, to the diffuser outlet 7 adjoining the impeller suction opening 8.
  • This bypass line contains a valve 14 that automatically closes the bypass line, the valve body 15 of the bypass line 13 opening in the direction from the suction line 10 to the impeller suction opening 8 in the illustrated embodiment consists of a ball, the specific weight of which is greater than the specific weight of the conveyed medium by a predetermined amount .
  • the valve body can also be specifically lighter than the delivery medium and then pressed down against the opening direction of the valve 14 by a spring generating the closing force on the valve seat.
  • the closing force acting on the valve body 15 due to its own weight or due to spring force is smaller than the pump suction force acting on the valve when the centrifugal pump is completely pumped, so that the valve body 15, as soon as the final suction power of the centrifugal pump has built up, depends on the suction effect of the Pump impeller can also be lifted from the valve seat of the valve 14.
  • the housing pressure line 5 is connected to the upper region of the propellant chamber 4, and the housing suction line 10 also has a section 16 which is higher than the mouth of the driving nozzle 11 into the diffuser inlet 9.
  • the propellant chamber 4 can be filled with a liquid propellant up to and beyond the jet pump device consisting of the propellant nozzle 11 and diffuser 6, or remains filled with the conveying medium as the propellant.
  • the valve 14 automatically keeps the bypass line 13 closed, so that the pump impeller 3 for air intake effected circulation flow of the propellant takes place exclusively from the propellant chamber 4 through the propellant nozzle 11, the diffuser 6 and through the pump chamber 2 back to the propellant chamber 4.

Landscapes

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

Claims (3)

  1. Pompe centrifuge auto-amorçante, avec une chambre de pompe (2) contenant le rotor de pompe (3) reliée côté refoulement à une enceinte à agent moteur (4) et reliée, conjointement à celle-ci, à la conduite de refoulement (5) du carter de pompe (1), avec un diffuseur de pompe à jet (6), dont la sortie (7) élargie débouche devant l'ouverture d'aspiration (8) du rotor de pompe (3) dans la chambre de pompe (2) et dont l'entrée rétrécie (9) est raccordée à la conduite d'aspiration (10) du carter de pompe (1) et avec une buse injecteur de pompe à jet (11) qui est raccordée par un canal d'amenée (12) à l'enceinte de l'agent moteut (4) et dont l'embouchure coopère, à l'intérieur de la conduite d'aspiration (10) à la façon d'un injecteur avec l'entrée de diffuseur (9), une conduite de dérivation (13) étant raccordée à la conduite d'aspiration (10) du carter de pompe (1) et menant avec un contournement de l'entrée de diffuseur (9) coopérant avec la buse injecteur (11), à la sortie de diffuseur (7) limitrophe à l'ouverture d'aspiration de rotor (8) et contenant une soupape (14) assurant la fermeture de la conduite de dérivation (13),
       caractérisée par le fait que la soupape (14) est une soupape automatique dont l'opercule (15) ouvre la conduite de dérivation (13) dans la direction allant de la conduite d'aspiration (10) à l'ouverture d'aspiration de rotor (8), la force de fermeture, agissant sur l'opercule (15) à l'encontre de son sens d'ouverture, étant de valeur inférieure à la force d'aspiration de pompe, régnant dans la sortie de diffuseur et agissant sur la soupape, lorsque la pompe à centrifuge fournit sa pleine puissance.
  2. Pompe centrifuge auto-amorçante selon la revendication 1, caractérisée par le fait que la chambre de pompe (2) contient un rotor de pompe (3) tournant autour d'un axe sensiblement horizontal et reliée sur la zone périphérique du rotor de pompe à une enceinte à agent moteur (4) disposé coaxialement, la conduite de refoulement de carter (5) étant raccordée à la zone supérieure de l'enceinte à agent moteur (4), et un canal d'amenée (12), menant à la buse injecteur (11), étant relié à la zone inférieure de l'enceinte à carburant, la conduite d'aspiration de carter (10) présentant un tronçon (16) situé à un niveau supérieur à celui de l'embouchure de sortie de la buse injecteur (11) dans l'entrée de diffuseur (9).
  3. Pompe centrifuge auto-amorçante selon la revendication 1 ou 2, caractérisée par le fait que la soupape (14) de la conduite de dérivation (13) contient un opercule (15) se fermant automatiquement sous l'effet de la gravité, de préférence constitué d'une sphère ou d'une bille, dont le poids spécifique est supérieur, d'une valeur prédéterminée, au poids spécifique du liquide à refouler.
EP94114953A 1993-09-25 1994-09-22 Pompe centrifuge autoamorçante Expired - Lifetime EP0645541B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9314532U DE9314532U1 (de) 1993-09-25 1993-09-25 Selbstansaugende Kreiselpumpe
DE9314532U 1993-09-25

Publications (2)

Publication Number Publication Date
EP0645541A1 EP0645541A1 (fr) 1995-03-29
EP0645541B1 true EP0645541B1 (fr) 1997-08-06

Family

ID=6898565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114953A Expired - Lifetime EP0645541B1 (fr) 1993-09-25 1994-09-22 Pompe centrifuge autoamorçante

Country Status (3)

Country Link
US (1) US5474418A (fr)
EP (1) EP0645541B1 (fr)
DE (2) DE9314532U1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29520422U1 (de) * 1995-12-22 1997-04-30 Speck-Pumpenfabrik Walter Speck KG, 91154 Roth Selbstansaugende tauchfähige Kreiselpumpe
DE19962729A1 (de) * 1999-12-23 2001-07-05 Grundfos As Selbstansaugendes Pumpenaggregat
US20080089777A1 (en) * 2006-08-30 2008-04-17 Lang John P Self-priming adapter apparatus and method
RU2351805C1 (ru) * 2007-12-12 2009-04-10 Закрытое акционерное общество "Гидрогаз" Самовсасывающий центробежный насос
CN102322424B (zh) * 2011-10-13 2013-03-06 江苏万丰船用设备制造有限公司 喷射式自吸离心水泵
US9695826B1 (en) 2012-06-28 2017-07-04 James Harmon Pitot tube pump and related methods
CN106194840B (zh) * 2016-09-30 2023-03-21 利欧集团浙江泵业有限公司 花园泵的流道体结构
RU2683062C1 (ru) * 2018-07-10 2019-03-26 Андрей Юрьевич Языков Центробежный насос
MX2021003000A (es) * 2018-09-12 2021-05-27 Pedrollo Spa Bomba centrifuga autocebante.
CN112555137A (zh) * 2020-12-14 2021-03-26 宁波君禾智能科技有限公司 水泵控制系统
CN218207212U (zh) * 2022-06-09 2023-01-03 宁波君禾智能科技有限公司 一种喷射泵
MX2022015514A (es) * 2022-06-09 2024-01-11 Ningbo Junhe Intelligent Tech Co Ltd Bomba de inyeccion.
US12038022B2 (en) 2022-06-09 2024-07-16 Ningbo Junhe Intelligent Technology Co., Ltd Self-priming jet pump
FR3153376A1 (fr) 2023-09-21 2025-03-28 Safran Aircraft Engines Systeme d’alimentation en carburant d’une turbomachine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2181792A (en) * 1938-03-07 1939-11-28 Herbert E Rupp Centrifugal self-priming pump
US2247654A (en) * 1938-12-29 1941-07-01 Ferguson Charles Hiram Pumping apparatus
US2400434A (en) * 1944-06-07 1946-05-14 Arthur J Nelson Self-priming centrifugal pump
US2634680A (en) * 1949-10-17 1953-04-14 Schleyer Victor Pump
US2897764A (en) * 1956-02-03 1959-08-04 Borg Warner Pump priming arrangement
US2853014A (en) * 1956-02-28 1958-09-23 Fred A Carpenter Booster attachment for centrifugal pumps
US2941474A (en) * 1956-08-20 1960-06-21 Fairbanks Morse & Co Self-priming pumping apparatus
FR1222755A (fr) * 1959-01-22 1960-06-13 Perfectionnement aux pompes centrifuges à amorçage par hydro-éjecteur
JPS5844647B2 (ja) * 1975-05-22 1983-10-04 株式会社クラレ ハロゲンカゴウブツノセイゾウホウホウ
US4767281A (en) * 1987-06-04 1988-08-30 Lear Siegler, Inc. Centrifugal pump system with inlet reservoir
IT1234116B (it) * 1989-06-07 1992-04-29 Novax S R L Pompa centrifuga autoadescante.
GB9106000D0 (en) * 1991-03-21 1991-05-08 Burden Charles E Valve and pump assembly

Also Published As

Publication number Publication date
US5474418A (en) 1995-12-12
EP0645541A1 (fr) 1995-03-29
DE59403625D1 (de) 1997-09-11
DE9314532U1 (de) 1993-12-09

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