EP0660904A1 - Pompe centrifuge. - Google Patents

Pompe centrifuge.

Info

Publication number
EP0660904A1
EP0660904A1 EP94918260A EP94918260A EP0660904A1 EP 0660904 A1 EP0660904 A1 EP 0660904A1 EP 94918260 A EP94918260 A EP 94918260A EP 94918260 A EP94918260 A EP 94918260A EP 0660904 A1 EP0660904 A1 EP 0660904A1
Authority
EP
European Patent Office
Prior art keywords
impeller
hub
space
liquid
gap
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
EP94918260A
Other languages
German (de)
English (en)
Other versions
EP0660904B1 (fr
Inventor
Martin Staehle
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0660904A1 publication Critical patent/EP0660904A1/fr
Application granted granted Critical
Publication of EP0660904B1 publication Critical patent/EP0660904B1/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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • 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
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F04D9/003—Preventing vapour lock by means in the very pump separating and removing the vapour
    • 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 present invention relates to a centrifugal pump according to the preamble of claim 1.
  • a centrifugal pump of this type is described for example in EP-PS 114 932.
  • the object of the present invention is to improve the separation of gas and liquid in a pump of the type mentioned.
  • the overpressures occurring locally in the pump chamber have different heights depending on the impeller configuration and accordingly result in different liquid-gas compositions.
  • the aim of the invention is to improve the separation of liquid and gas compared to the prior art mentioned - regardless of the impeller configuration.
  • the vanes of the coaxial axial impeller which is non-rotatably connected to the impeller, or the vanes attached radially symmetrically to the impeller hub capture the medium entering the hub space and set it in intensive rotation.
  • the separation of gas and liquid becomes clearer because the gas with the smallest diameter (at the shaft gap) can leave the hub space.
  • the gas leaves the hub space before it mixes with the liquid again and can return to the impeller channel due to the uneven pressure conditions in the labyrinth gap.
  • the separated liquid receives a higher pressure and is expelled through the nozzle of a liquid jet pump.
  • the negative pressure generated by the liquid jet is used to remove the separated gases.
  • the end The gas-liquid mixture emerging from the liquid jet pump can be passed into a gas separator of known design, from where the liquid is returned to the pump suction line.
  • Fig. 1 shows a cross section through a centrifugal pump and Fig. 2 is a view of the centrifugal pump in a reduced view.
  • the centrifugal pump according to FIG. 1 has an open, single-bladed centrifugal pump wheel 1 and is rotatably mounted in a pump housing 2.
  • the centrifugal pump wheel 1 sits with its hub 3 on a shaft 4 mounted in a bearing 19 and rotates with little play "a" over the rear wall 5, which forms a labyrinth gap 6 with the hub 3 of the centrifugal pump wheel 1.
  • the labyrinth gap connects the pump space 2 1 to a hub space 7. Gas which has been collected from the material to be conveyed in the impeller center and mixed with liquid passes through the labyrinth gap 6 from the pump space 2 'into the hub space 7, where it is rotatably connected to the hub 3 connected wing 8 experiences a stronger rotary movement.
  • the liquid flows under higher pressure from the hub space 7 through a drive nozzle 12 passing through the hub housing wall 20 into a diffuser tube 13 and thereby entrains the gas from the space 11.
  • a connecting line 14 (FIG. 2) connecting to the diffuser tube 13 leads the gas-liquid mixture into a gas separator 15, which separates the liquid from the suction side Returns connection 16 of the centrifugal pump and discharges the gas through a line 17 into a suitable space.
  • a shaft seal 18 protects drive and bearing elements from contact with the conveyor belt.

Landscapes

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

Abstract

Le rotor (1) est monté, par son moyeu (3), solidaire en rotation sur un arbre (4). La rotation des bords, côté entraînement, du rotor (1) s'effectue avec un faible jeu (a) au-dessus d'une paroi arrière (5) du corps de pompe. Cette paroi forme, avec le rotor (1), une fente en labyrinthe (6). Cette dernière relie l'espace de la pompe (2') à une zone du moyeu (7). Dans cette zone du moyeu (7), une roue à ailettes est reliée coaxialement, solidaire en rotation, avec le rotor (1), dans le but de conférer au liquide dans la zone du moyeu (7), un plus fort mouvement de rotation et de l'accélérer. La zone du moyeu (7) est munie d'une ouverture périphérique (12) pour la sortie du liquide. L'air accumulé dans la zone de l'arbre (4) s'échappe par une fente (10) formée par la paroi (20) de l'enveloppe du moyeu et l'arbre (4). L'ouverture périphérique (12) est ménagée dans la paroi (20) de l'enveloppe du moyeu et est réalisée sous la forme d'une tuyère de propulsion; elle débouche dans un espace (11) limitrophe de la zone du moyeu (7) et relié à ladite zone par la fente (10); elle est orientée à l'encontre d'un tube-diffuseur (11) et forme une pompe à jet de liquide (12, 13) traversée par le liquide provenant de la zone du moyeu (7).
EP94918260A 1993-07-16 1994-06-24 Pompe centrifuge Expired - Lifetime EP0660904B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2160/93 1993-07-16
CH02160/93A CH689004A5 (de) 1993-07-16 1993-07-16 Kreiselpumpe.
PCT/CH1994/000129 WO1995002768A1 (fr) 1993-07-16 1994-06-24 Pompe centrifuge

Publications (2)

Publication Number Publication Date
EP0660904A1 true EP0660904A1 (fr) 1995-07-05
EP0660904B1 EP0660904B1 (fr) 1997-03-05

Family

ID=4227284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94918260A Expired - Lifetime EP0660904B1 (fr) 1993-07-16 1994-06-24 Pompe centrifuge

Country Status (8)

Country Link
US (1) US5545005A (fr)
EP (1) EP0660904B1 (fr)
JP (1) JPH08501615A (fr)
CN (1) CN1063529C (fr)
CH (1) CH689004A5 (fr)
DE (1) DE59401938D1 (fr)
RU (1) RU2118712C1 (fr)
WO (1) WO1995002768A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE508348C2 (sv) * 1996-03-27 1998-09-28 Sunds Defibrator Ind Ab Sätt och anordning vid pumpning av ett gasinnehållande medium där gasen evakueras med hjälp av sugverkan från en ejektor
US5997242A (en) * 1996-12-02 1999-12-07 Alden Research Laboratory, Inc. Hydraulic turbine
DE102009030161A1 (de) * 2009-06-24 2011-02-10 Schröder Maschinenbau KG Umwälzsystem für lebensmittelverträgliche Flüssigkeiten
DE102015002397A1 (de) * 2015-02-24 2016-08-25 Dickow-Pumpen Kg Kühl- und Entgasungssystem
WO2016165090A1 (fr) * 2015-04-16 2016-10-20 威海凌云流体传动科技有限公司 Pompe à deux phases gaz-liquide
US20190023411A1 (en) * 2017-07-24 2019-01-24 Hamilton Sundstrand Corporation Hydrocarbon fuel system
WO2020046799A1 (fr) * 2018-08-27 2020-03-05 The Texas A&M University System Turbomachines a haute densité energetique

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB775161A (en) * 1954-05-17 1957-05-22 Rene Leduc Improvements in centrifugal pump installations
DE1098364B (de) * 1957-06-27 1961-01-26 Paul Bungartz Wellenspaltabdichtung fuer Kreiselpumpen, Kreiselkompressoren, Ruehrer u. dgl. mit einem Hilfsfoerderrad
GB1027790A (en) * 1964-03-10 1966-04-27 Frank Mohn Improvements in self-priming centrifugal pumps
DE2220875A1 (de) * 1972-04-28 1974-02-14 Rheinstahl Ag Selbstansaugende kreiselpumpe
CH557472A (de) * 1972-09-13 1974-12-31 Sulzer Ag Turbopumpe.
DE2757952C2 (de) * 1977-12-24 1983-02-24 Sihi Gmbh & Co Kg, 2210 Itzehoe Selbstansaugende Kreiselpumpe
DE3365881D1 (en) * 1982-12-22 1986-10-09 Staehle Martin Centrifugal pump of the open channel rotor type
FI73023C (fi) * 1984-07-17 1987-08-10 Ahlstroem Oy Anordning foer avskiljande av gas ur en fibersuspension.
US5152663A (en) * 1990-09-07 1992-10-06 A. Ahlstrom Corporation Centrifugal pump
US5114310A (en) * 1990-09-07 1992-05-19 A. Ahlstrom Corporation Centrifugal pump with sealing means
US5215430A (en) * 1992-02-26 1993-06-01 J. C. Carter Company, Inc. Ignition-source free fuel pump
US5413462A (en) * 1994-03-08 1995-05-09 Reliance Electric Industrial Co. Mechanical power transmission system having improved lubricant circulation apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9502768A1 *

Also Published As

Publication number Publication date
CN1112371A (zh) 1995-11-22
EP0660904B1 (fr) 1997-03-05
WO1995002768A1 (fr) 1995-01-26
US5545005A (en) 1996-08-13
DE59401938D1 (de) 1997-04-10
CN1063529C (zh) 2001-03-21
RU95108259A (ru) 1997-03-10
CH689004A5 (de) 1998-07-15
RU2118712C1 (ru) 1998-09-10
JPH08501615A (ja) 1996-02-20

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