EP0512190B1 - Weniger leicht verstopfende Pumpe - Google Patents

Weniger leicht verstopfende Pumpe Download PDF

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Publication number
EP0512190B1
EP0512190B1 EP91850116A EP91850116A EP0512190B1 EP 0512190 B1 EP0512190 B1 EP 0512190B1 EP 91850116 A EP91850116 A EP 91850116A EP 91850116 A EP91850116 A EP 91850116A EP 0512190 B1 EP0512190 B1 EP 0512190B1
Authority
EP
European Patent Office
Prior art keywords
vanes
impeller
pump
regular
front edges
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
EP91850116A
Other languages
English (en)
French (fr)
Other versions
EP0512190A1 (de
Inventor
Ulf Arbeus
Per Strinning
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.)
Xylem Water Solutions AB
Original Assignee
ITT Flygt 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 ITT Flygt AB filed Critical ITT Flygt AB
Priority to DE1991625364 priority Critical patent/DE69125364T2/de
Publication of EP0512190A1 publication Critical patent/EP0512190A1/de
Application granted granted Critical
Publication of EP0512190B1 publication Critical patent/EP0512190B1/de
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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/548—Specially adapted for liquid pumps
    • 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
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • 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
    • 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
    • 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
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/12—Fluid guiding means, e.g. vanes
    • F05D2240/121—Fluid guiding means, e.g. vanes related to the leading edge of a stator vane

Definitions

  • This invention concerns a rotodynamic pump comprising an impeller rotating in a pump housing according to the preamble of Claim 1 and as known from EP-A-0 298 693.
  • Such pumps may roughly be categorized as centrifugal pumps and axial pumps.
  • the centrifugal pump comprises an impeller consisting of a hub, at least one cover disc on said hub and a number of vanes, a so-called open impeller.
  • a closed impeller is provided with two cover discs and intermediate vanes. Common for the two types is that the liquid is sucked into the centre of the impeller in an axial direction and leaves it tangentially at the periphery.
  • the axial flow pump differs from the centrifugal pump in that the liquid leaves the pump in a substantially axial direction.
  • This linking of the fluid is taken care of by a number of vanes in the pump housing after the impeller. These vanes also normally serve as supporting elements in the housing construction.
  • the purpose of this invention is to solve the clogging problems mentioned above in a totally new and different way.
  • BE-A-535864 shows a pump which, in additional to conventional impeller vanes, is provided with additional fixed vanes which deviate the flow after the impeller and thus have no influence on the clogging.
  • EP-A-0298 693 shows a pump for viscous liquids comprising two axially displaced sets of impeller vanes on a common hub, where the first set feeds the fluid into the second for better efficiency.
  • the pump is thus suitable for viscous liquids, but elongated fibres will easily be wound up around the first set of vanes.
  • Fig 1 shows a conventional impeller for a centrifugal pump.
  • Fig 2 shows a corresponding impeller according to the invention, while
  • Fig 3 shows a housing for an axial flow pump having vanes designed according to the invention.
  • FIG. 1 stands for the hub of an impeller, 2 and 3 cover discs, 4 and 5 inlet and outlet respectively and 6 regular impeller vanes with front edges 7.
  • 8 stands for additional impeller vanes with front edges 9
  • 10 stands for a slot between the vane 8 and the cover plate 2.
  • 11 stands for regular vanes with front edges 12, 13 additional vanes with front edges 14 and 15 finally a slot at the end of the vane 13.
  • a conventional impeller comprises a hub 1 with upper and lower cover discs 2 and 3 respectively, inlet and outlet 4 and 5 respectively and vanes 6. On the front edges 7 of the latter, fibres etc often get stuck.
  • a number of additional vanes 8 are arranged in the gaps between the regular vanes 6.
  • the additional vanes are attached to one of the cover plates 3 and extend with strongly backwards swept front edges 9 towards the other cover plate 2, however, without making contact with the latter.
  • the front edges 9 of the additional vanes 8 are so arranged that they are located in front of the front edges 7 of the regular vanes as seen in the direction of the flow. This means that elongated objects in the liquid are caught by said edges 9, the objects then sliding along the edge in the direction of the cover disc 2 and finally through the slot 10 between the vane and the cover disc.
  • the number of regular vanes of the impeller is adapted to the operating conditions of the impeller and the number of additional vanes depends thereof as these vanes are located between the regular ones.
  • the distance between the front edges of the regular and additional vanes may also depend on the actual operating conditions. According to the invention, however, the front edge of the additional vane must always be swept backwards to such extent, that its free end is always located behind the front edge of the regular vane as seen in the direction of the flow.
  • a flow pump is shown.
  • Such a pump is thus characterized by the pumped liquid being linked in such a way that it leaves the pump in an essentially axial direction.
  • the linking is obtained by help of vanes 11 arranged downstream of the impeller, the vanes at the same time serving as supporting elements of the driving unit.
  • vanes 13 are arranged between the original ones.
  • the vanes 13 are only attached at one end as they do not need to serve as supporting elements and their front edges 14 are strongly swept backwards.
  • the vanes 13 are so arranged that their front edges 14 are located in front of the front edges 12 of the regular vanes 11, thus making sure that the pollutions are caught by the former. Thanks to the design with the front edge swept backwards in the direction of the slot 15 where the vane is free, the pollutions go easily through. Here, the pollution have also passed the front edges of the regular vanes and will therefore not stick to those.

Landscapes

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

Claims (1)

  1. Pumpe mit einem rotierenden Laufrad und einem umgebenden Gehäuse, wobei das Laufrad oder alternativ hierzu das Laufrad und das Gehäuse mit einer Anzahl regulärer Flügel (6), (11) versehen ist bzw. sind,
    dadurch gekennzeichnet, daß zusätzliche Flügel (8), (13) in den Lücken zwischen den regulären Flügeln vorgesehen und derart ausgebildet sind,
    daß in Strömungsrichtung betrachtet ihre Vorderkanten (9), (14) vor den Vorderkanten (7), (12) der regulären Flügel angeordnet sind, und daß die zusätzlichen Flügel (8), (13) in Strömungsrichtung nach hinten geneigt sind, und daß die zusätzlichen Flügel (8), (13) an dem Laufrad oder dem Pumpengehäuse derart angebracht sind, daß stets ein Schlitz (10) zwischen dem Flügel (8), (13) und der Nabe (1), alternativ hierzu der Abdeckscheibe (2) oder dem umgebenden Pumpengehäuse, vorhanden ist.
EP91850116A 1990-04-02 1991-05-08 Weniger leicht verstopfende Pumpe Expired - Lifetime EP0512190B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1991625364 DE69125364T2 (de) 1991-05-08 1991-05-08 Weniger leicht verstopfende Pumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9001193A SE466767B (sv) 1990-04-02 1990-04-02 Igensaettningsfri pump

Publications (2)

Publication Number Publication Date
EP0512190A1 EP0512190A1 (de) 1992-11-11
EP0512190B1 true EP0512190B1 (de) 1997-03-26

Family

ID=20379064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91850116A Expired - Lifetime EP0512190B1 (de) 1990-04-02 1991-05-08 Weniger leicht verstopfende Pumpe

Country Status (2)

Country Link
EP (1) EP0512190B1 (de)
SE (1) SE466767B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4314477A1 (de) * 1993-05-03 1994-11-10 Klein Schanzlin & Becker Ag Kreiselpumpe axialer Bauart
DE19510811A1 (de) * 1995-03-24 1996-09-26 Klein Schanzlin & Becker Ag Faser abweisende Wandflächengestaltung
DE19651736A1 (de) * 1996-12-12 1998-06-18 Andreas Dr Keller Wasserturbine oder -pumpe
US8124019B2 (en) 2009-08-21 2012-02-28 Exxonmobil Chemical Patents Inc. Clog-resistant pump assembly for slurry loop reactor
CN114076121A (zh) * 2021-03-15 2022-02-22 中交疏浚技术装备国家工程研究中心有限公司 一种将导叶应用于离心式泥泵以实现抗磨的新方法
CN114076104B (zh) * 2021-05-11 2023-12-05 中交疏浚技术装备国家工程研究中心有限公司 一种抗磨离心式泥泵

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE535864A (de) *

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
& SU-A-1 549 186 (POPOV I K) 15 January 1991 *

Also Published As

Publication number Publication date
EP0512190A1 (de) 1992-11-11
SE9001193D0 (sv) 1990-04-02
SE9001193L (sv) 1991-10-03
SE466767B (sv) 1992-03-30

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