WO1993022563A1 - Pompe centrifuge destinee en particulier a des fluides contenant un gaz, et son procede de fonctionnement - Google Patents

Pompe centrifuge destinee en particulier a des fluides contenant un gaz, et son procede de fonctionnement Download PDF

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Publication number
WO1993022563A1
WO1993022563A1 PCT/SE1993/000369 SE9300369W WO9322563A1 WO 1993022563 A1 WO1993022563 A1 WO 1993022563A1 SE 9300369 W SE9300369 W SE 9300369W WO 9322563 A1 WO9322563 A1 WO 9322563A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
centrifugal pump
seal housing
pump wheel
intended
Prior art date
Application number
PCT/SE1993/000369
Other languages
English (en)
Inventor
Bengt Algers
Leo Kotkaniemi
Original Assignee
Abs Pump Production Ab
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 Abs Pump Production Ab filed Critical Abs Pump Production Ab
Publication of WO1993022563A1 publication Critical patent/WO1993022563A1/fr

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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
    • 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

Definitions

  • Centrifugal Pump intended in particular for Gas containing Fluids, and Method of operating such a Pump
  • This invention relates to a centrifugal pump, intended in particular for gas containing fluids, and method of operating such a pump.
  • Ribs or bars of the kind comprised in the pump according to the invention are known p e r s e. Up to now they have been inserted into seal housings or casings of pumps for fluids containing particles of an abrasive kind, e.g. sand, i.e. not in pumps for fluids containing more or less gas, such as paper pulp. The purpose of the ribs has been to break a rotating ring of particles, which comes into existence in the seal housing and may cause harmful wear thereof and/or of the seals (the plane seal).
  • Pump wheels which are provided with one or several apertures also belong to the state of art. Up to now these apertures in the pump wheel have had the purpose of reducing the pressure on the rear side of the wheel inside a rear seal ring or, when the wheel is provided with rear blading, also to pump in cooperation therewith.
  • air gas
  • a known measure for reducing this accumulation of air consists in connecting the space, where air accumulates, with the suction side of the pump by means of a tube conduit.
  • a drawback of this known measure resides therein, that such an outer connection is cumbersome and has to be made with unreasonably large inside diameter, so that it does not become clogged by fibres and other solids in the liquid fluid.
  • the principal object of the invention is to eliminate the above drawback and to provide a pump having considerably improved deaeration. This object is attained through the combination defined in claim 1.
  • the improved deaeration depends, at least mostly, on the fact that the ribs break larger air-bubbles to smaller ones, which more easily are moved out of the seal housing and pass through the apertures in the pump wheel.
  • a condition for this to occur is the maintenance of an over ⁇ pressure in the seal housing according to claim 6, so that the flow through the apertures takes place in the right direction.
  • This over-pressure can be attained by making the rear vanes or blades sufficiently small or omitting them.
  • Fig. 1 is an axial section basically on line I - I in Fig. 1 through a pump wheel and a seal housing of a centrifugal pump.
  • Fig. 2 is a cross-section substantially on line II - II in Fig. 1. Description of the preferred embodiment
  • FIG. 1 designates a seal housing which constitutes part of a pump housing cover, 2 a stationary plane seal, 3 a rotating plane seal, and 4 a pump wheel which is fixed onto a pump wheel shaft 8 and is provided with rear vanes or blades 5, which are low not to create an under-pressure.
  • the pump wheel 4 has at least one aperture 6, and the seal housing 1 has at least one rib or bar 7.
  • there is only one aperture but such apertures may be more numerous, e.g. three or four.
  • the diameter of the apertures 6 varies in dependence of the pump size and the number of apertures, but is suitably comprised between 3 and 15 mm.

Landscapes

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

Abstract

L'invention se rapporte à une pompe centrifuge et à son procédé de fonctionnement. Afin de permettre une désaération améliorée, la pompe se caractérise par une combinaison d'au moins une nervure (7) qui s'étend de manière sensiblement parallèle à l'arbre (8) de la roue de pompe, et qui est placée sur la surface interne orientée vers l'arbre, d'un couvercle de carter de pompe, d'une chambre d'étanchéité ou analogue (1), et d'une roue de pompe (4) qui comprend au moins une ouverture traversante (6) plus proche de l'arbre de la roue de pompe que ladite nervure. La pompe décrite ci-dessus fonctionne de telle manière qu'une surpression est maintenue sur le côté arrière de la roue de pompe, orienté vers la chambre d'étanchéité.
PCT/SE1993/000369 1992-04-29 1993-04-27 Pompe centrifuge destinee en particulier a des fluides contenant un gaz, et son procede de fonctionnement WO1993022563A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9201342A SE9201342L (sv) 1992-04-29 1992-04-29 För i synnerhet gasbemängda medier avsedd centrifugalpump samt sätt att driva en sådan pump
SE9201342-4 1992-04-29

Publications (1)

Publication Number Publication Date
WO1993022563A1 true WO1993022563A1 (fr) 1993-11-11

Family

ID=20386092

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1993/000369 WO1993022563A1 (fr) 1992-04-29 1993-04-27 Pompe centrifuge destinee en particulier a des fluides contenant un gaz, et son procede de fonctionnement

Country Status (2)

Country Link
SE (1) SE9201342L (fr)
WO (1) WO1993022563A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010054753A1 (fr) * 2008-11-12 2010-05-20 Ksb Aktiengesellschaft Dispositif de dégazage pour espaces remplis de liquide avec des composants rotatifs
US7947112B1 (en) 2007-07-16 2011-05-24 Rheodyne, Llc Method for degassing a fluid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921400A (en) * 1987-07-06 1990-05-01 A. Ahlstrom Corporation Pump and a method of separating gas by such from a fluid to be pumped
US4979875A (en) * 1986-10-17 1990-12-25 Sihi Gmbh & Co. Kg Centrifugal pump for the delivery of hot liquids
US4981413A (en) * 1989-04-27 1991-01-01 Ahlstrom Corporation Pump for and method of separating gas from a fluid to be pumped

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979875A (en) * 1986-10-17 1990-12-25 Sihi Gmbh & Co. Kg Centrifugal pump for the delivery of hot liquids
US4921400A (en) * 1987-07-06 1990-05-01 A. Ahlstrom Corporation Pump and a method of separating gas by such from a fluid to be pumped
US4981413A (en) * 1989-04-27 1991-01-01 Ahlstrom Corporation Pump for and method of separating gas from a fluid to be pumped

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7947112B1 (en) 2007-07-16 2011-05-24 Rheodyne, Llc Method for degassing a fluid
WO2010054753A1 (fr) * 2008-11-12 2010-05-20 Ksb Aktiengesellschaft Dispositif de dégazage pour espaces remplis de liquide avec des composants rotatifs
CN102216624A (zh) * 2008-11-12 2011-10-12 Ksb股份公司 具有旋转构件的用于液体填充室的排气装置

Also Published As

Publication number Publication date
SE9201342L (sv) 1993-10-30
SE9201342D0 (sv) 1992-04-29

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