EP1815144A1 - Laufrad - Google Patents

Laufrad

Info

Publication number
EP1815144A1
EP1815144A1 EP05801669A EP05801669A EP1815144A1 EP 1815144 A1 EP1815144 A1 EP 1815144A1 EP 05801669 A EP05801669 A EP 05801669A EP 05801669 A EP05801669 A EP 05801669A EP 1815144 A1 EP1815144 A1 EP 1815144A1
Authority
EP
European Patent Office
Prior art keywords
impeller
leading edges
pump
impeller wheel
vanes
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
EP05801669A
Other languages
English (en)
French (fr)
Other versions
EP1815144B8 (de
EP1815144B1 (de
Inventor
Martin Lindskog
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.)
ITT Manufacturing Enterprises LLC
Original Assignee
ITT Manufacturing Enterprises LLC
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 Manufacturing Enterprises LLC filed Critical ITT Manufacturing Enterprises LLC
Priority to PL05801669T priority Critical patent/PL1815144T3/pl
Priority to SI200530263T priority patent/SI1815144T1/sl
Publication of EP1815144A1 publication Critical patent/EP1815144A1/de
Application granted granted Critical
Publication of EP1815144B1 publication Critical patent/EP1815144B1/de
Publication of EP1815144B8 publication Critical patent/EP1815144B8/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/181—Axial flow rotors
    • F04D29/183—Semi axial flow rotors
    • 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
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • 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
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/11—Kind or type liquid, i.e. incompressible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

Definitions

  • the invention concerns a pump impeller and more precisely a pump impeller for centrifugal- or half axial pumps for pumping of fluids containing pollutants.
  • Sewage water contains a lot of different types of pollutants, the amount and structure of which depend on the season and type of area from which the water emanates.
  • plastic material, hygiene articles, textile etc are common, while industrial areas may produce wearing particles.
  • the worst problems are rags and the like which stick to the leading edges of the vanes and become wound around the impeller hub. Such incidents cause frequent service intervals and a reduced efficiency.
  • closed pump impellers are often used, i.e. such with two cover discs, an upper and a lower as well as intermediate vanes, because these types of impellers reduce the axial load on the pump in comparison to the open type impellers.
  • closed impellers have a lesser lead-through, which means higher risk for clogging.
  • closed impeller wheels they are generally designed with leading edges placed in the central inlet siich that they are rather straight as seen in the flow direction. It has been found that during use, and in particular when the liquid contains rather large quantities of abrasive pollution, there is considerable wear on the leading edges of the vanes. There is further a risk that pollutants such as rags, plastic bags and other elongated objects get stuck on the leading edges, thereby requiring cleaning of the pump.
  • the aim of the present invention is to remedy the above mentioned problems and in particular in connection with closed impeller wheels.
  • an impeller wheel of a centrifugal or half axial type to be used in a pump for pumping liquids wherein the impeller is arranged with one or several vanes, that the vanes are attached to cover discs on each side, forming a so called closed impeller wheel, characterized in that the leading edges of the vanes are swept backwards at the inlet opening in one of the cover discs of the impeller.
  • leading edges co-operate with cutting means arranged in a central inlet opening of the pump.
  • leading edges protrude somewhat out of the inlet opening, and that the cutting means constitute at least one narrowing section of the gap between the central inlet opening of the pump and the leading ledges of the impeller, whereby, when the leading edges sweep past these sections during operation, a ciitting action is obtained there between.
  • the leading edge of the vanes co-operate with two narrowing parts of the inlet opening of the pump housing.
  • the sweep angle ⁇ should be in the region 40 - 60° and the sweeping of the leading edges may generally follow the curvature of a logarithmic spiral. In all an impeller wheel with improved performance and wear resistance is obtained, leading to long operation cycles between maintenance and service.
  • Fig. 1 is an axial cross- section through a pump according to the invention
  • Fig. 2a is a perspective view from above of an impeller wheel comprising the present invention
  • Fig. 2b is a view corresponding to Fig. 2a from below
  • Fig. 3 is a view from below of the impeller wheel of Fig. 2, and
  • Fig. 4 is a bottom plate to be mounted in a pump and co-operating with the impeller wheel according to Fig. 1.
  • Fig. 1 shows an impeller wheel of the closed type mounted in a pump comprising a drive shaft 10 connected to an electrical motor (not shown) for driving the pump.
  • a pump impeller 12 is mounted, comprising upper 14 and lower 16 cover discs, vanes 18 and back vanes 19.
  • the above mentioned components are mounted in a pump housing 20, having a bottom wall 22, an inlet 24 and an outlet 26.
  • the pump impeller 12 is mounted such in the pump housing that there is a gap 28 between the peripheral surface of the lower cover disc 16 and an inner side wall of the pump housing 20, a space 29 between the lower disc and the bottom wall as well as a gap 30 between a lower surface of the lower cover disc 16 and an upper surface of the bottom wall 22.
  • the liquid is sucked in axially through the inlet 24 and leaves the pump through the outlet 26 according to flow arrows A, B and C.
  • the vanes 18 are designed such that the leading edges 40 are swept strongly backwards at the inlet opening 42 of the impeller wheel, in relation to the direction of rotation R.
  • the sweep angle could be increased from the hub and outwards.
  • the sweep of the leading edges could be defined by a logarithmic spiral where the sweep angle ⁇ is ⁇ /2 - ⁇ , where ⁇ is the angle of the logarithmic spiral.
  • the sweep angle should be in the region 40 - 60°.
  • the leading edges are placed generally in a plane perpendicular to the axis of rotation 10 of the impeller.
  • the advantage with this design is to make sure that pollutants slide towards the periphery instead of getting stuck on the edges. It has further been shown that the wear on the leading edges are reduced when they have this configuration instead of the conventional design. Further, the leading edges protrude somewhat out of the central opening of the impeller, Fig. 1.
  • the edge parts 44 of the vanes protruding above the bottom surface of the lower cover disc 16 can be arranged to co-operate with the edge part 46 of the stationary inlet 24 of the housing arranged in a bottom plate 22.
  • the circular inlet is thus arranged with two oppositely arranged straight parts 50 whereby the gap between the vanes and the edge part of the inlet becomes very small. Elongated pollution such as rags, plastic bags and the like that have been stuck on the leading edges of the vanes will be cut here.
EP05801669A 2004-11-19 2005-11-03 Laufrad Active EP1815144B8 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL05801669T PL1815144T3 (pl) 2004-11-19 2005-11-03 Koło łopatkowe
SI200530263T SI1815144T1 (sl) 2004-11-19 2005-11-03 Gonilno kolo

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0402840A SE0402840L (sv) 2004-11-19 2004-11-19 Pumphjul
PCT/EP2005/055726 WO2006053831A1 (en) 2004-11-19 2005-11-03 Impeller wheel

Publications (3)

Publication Number Publication Date
EP1815144A1 true EP1815144A1 (de) 2007-08-08
EP1815144B1 EP1815144B1 (de) 2008-03-19
EP1815144B8 EP1815144B8 (de) 2008-05-28

Family

ID=33516498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05801669A Active EP1815144B8 (de) 2004-11-19 2005-11-03 Laufrad

Country Status (26)

Country Link
US (1) US20090208336A1 (de)
EP (1) EP1815144B8 (de)
JP (1) JP4489119B2 (de)
KR (1) KR20070086413A (de)
CN (1) CN101061319A (de)
AP (1) AP2173A (de)
AT (1) ATE389809T1 (de)
AU (1) AU2005305920B2 (de)
BR (1) BRPI0518009A (de)
CA (1) CA2585171A1 (de)
DE (1) DE602005005515T2 (de)
DK (1) DK1815144T3 (de)
EA (1) EA009906B1 (de)
ES (1) ES2304178T3 (de)
HK (1) HK1106814A1 (de)
IL (1) IL182816A0 (de)
MX (1) MX2007005925A (de)
NO (1) NO20073096L (de)
NZ (1) NZ555389A (de)
PL (1) PL1815144T3 (de)
PT (1) PT1815144E (de)
SE (1) SE0402840L (de)
SI (1) SI1815144T1 (de)
UA (1) UA89653C2 (de)
WO (1) WO2006053831A1 (de)
ZA (1) ZA200704866B (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2935761B1 (fr) * 2008-09-05 2010-10-15 Alstom Hydro France Roue de type francis pour machine hydraulique, machine hydraulique comprenant une telle roue et procede d'assemblage d'une telle roue
DE102009011444A1 (de) * 2009-03-03 2010-09-09 Ksb Aktiengesellschaft Freistromrad mit Schneidkanten
JPWO2013015432A1 (ja) * 2011-07-25 2015-02-23 泰工技研工業株式会社 流体機械
CN105392998B (zh) * 2013-06-21 2019-09-13 流量控制有限责任公司 具有杂物移除叶轮背部叶片的泵
JP6351216B2 (ja) * 2013-07-05 2018-07-04 株式会社荏原製作所 水中ポンプ用ポンプ羽根及びこれを備えた水中ポンプ
CN103696982A (zh) * 2013-12-06 2014-04-02 江苏大学 一种可自动切割纤维的污水轴流泵叶轮结构
JP6415116B2 (ja) * 2014-05-30 2018-10-31 株式会社荏原製作所 汚水ポンプ用のケーシングライナ及びこれを備えた汚水ポンプ
KR20180079505A (ko) * 2016-12-30 2018-07-11 명화공업주식회사 워터펌프 임펠러
CN108916066A (zh) * 2018-07-13 2018-11-30 江苏大学 一种用于输送带有颗粒和纤维的环保泵

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
US2712412A (en) * 1952-08-26 1955-07-05 New Holland Machine Division O Forage blower
US3447475A (en) * 1967-01-09 1969-06-03 Albert Blum Centrifugal pump
US3958895A (en) * 1975-02-07 1976-05-25 Brisson Leonard L Pump with shearing means
DE2612910A1 (de) * 1976-03-26 1977-09-29 Albert Blum Abwasserpumpe
CA1155712A (en) * 1979-10-29 1983-10-25 Rockwell International Corporation Composite centrifugal impeller for slurry pumps
SE466766B (sv) * 1989-04-27 1992-03-30 Flygt Ab Itt Centrifugalpump avsedd foer pumpning av vaetskor innehaallande fasta partiklar, exempelvis trasor och andra laangstraeckta foeremaal
US5438755A (en) * 1993-11-17 1995-08-08 Giberson; Melbourne F. Method of making a monolithic shrouded impeller
SE512154C2 (sv) * 1997-11-18 2000-02-07 Flygt Ab Itt Pumphjul för centrifugal- eller halvaxiella pumpar avsedda att pumpa i första hand avloppsvatten
SE520416C2 (sv) * 1997-11-18 2003-07-08 Flygt Ab Itt Pumphjul
AU8001100A (en) * 1999-10-06 2001-05-10 Vaughan Co., Inc. Centrifugal pump improvements
US6276899B1 (en) * 1999-11-05 2001-08-21 Flowserve Management Company Impeller manufacturing process
JP4358965B2 (ja) * 2000-03-27 2009-11-04 株式会社日立産機システム 遠心型羽根車および空気清浄装置
US20040136825A1 (en) * 2001-08-08 2004-07-15 Addie Graeme R. Multiple diverter for reducing wear in a slurry pump
US20040234370A1 (en) * 2002-09-26 2004-11-25 Mark Simakaski Chopping pump impeller assembly
EP1455094A1 (de) * 2003-03-04 2004-09-08 Ziehl-Abegg AG Radiallüfterrad

Non-Patent Citations (1)

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Title
See references of WO2006053831A1 *

Also Published As

Publication number Publication date
JP2008520889A (ja) 2008-06-19
DE602005005515D1 (de) 2008-04-30
EA200701098A1 (ru) 2007-10-26
MX2007005925A (es) 2007-06-19
EA009906B1 (ru) 2008-04-28
PT1815144E (pt) 2008-05-08
EP1815144B8 (de) 2008-05-28
SE527558C2 (sv) 2006-04-11
KR20070086413A (ko) 2007-08-27
ZA200704866B (en) 2008-09-25
NZ555389A (en) 2010-07-30
SI1815144T1 (sl) 2008-08-31
AU2005305920B2 (en) 2011-04-14
SE0402840L (sv) 2006-04-11
CN101061319A (zh) 2007-10-24
BRPI0518009A (pt) 2008-10-21
AU2005305920A1 (en) 2006-05-26
JP4489119B2 (ja) 2010-06-23
PL1815144T3 (pl) 2008-08-29
EP1815144B1 (de) 2008-03-19
ES2304178T3 (es) 2008-09-16
WO2006053831A1 (en) 2006-05-26
DK1815144T3 (da) 2008-07-14
US20090208336A1 (en) 2009-08-20
DE602005005515T2 (de) 2009-04-23
AP2173A (en) 2010-11-19
UA89653C2 (en) 2010-02-25
IL182816A0 (en) 2007-08-19
AP2007003998A0 (en) 2007-06-30
HK1106814A1 (en) 2008-03-20
CA2585171A1 (en) 2006-05-26
SE0402840D0 (sv) 2004-11-19
ATE389809T1 (de) 2008-04-15
NO20073096L (no) 2007-06-18

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