EP2226505A1 - Roue vortex dotée de bords coupants - Google Patents

Roue vortex dotée de bords coupants Download PDF

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Publication number
EP2226505A1
EP2226505A1 EP10001468A EP10001468A EP2226505A1 EP 2226505 A1 EP2226505 A1 EP 2226505A1 EP 10001468 A EP10001468 A EP 10001468A EP 10001468 A EP10001468 A EP 10001468A EP 2226505 A1 EP2226505 A1 EP 2226505A1
Authority
EP
European Patent Office
Prior art keywords
blades
cutting edges
winglets
centrifugal pump
front surfaces
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
EP10001468A
Other languages
German (de)
English (en)
Other versions
EP2226505B1 (fr
Inventor
Christoph Jäger
Rolf Witzel
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.)
KSB AG
Original Assignee
KSB AG
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 KSB AG filed Critical KSB AG
Publication of EP2226505A1 publication Critical patent/EP2226505A1/fr
Application granted granted Critical
Publication of EP2226505B1 publication Critical patent/EP2226505B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F04D29/2238—Special flow patterns
    • F04D29/2244—Free vortex

Definitions

  • the invention relates to a centrifugal pump for conveying a solid admixed medium with a housing in which a free-flow impeller is arranged and a vane-free space is formed between the free-flow impeller and the inlet-side housing wall, wherein the free-flow impeller comprises a support disc, are formed on the blades, have the pressure side side surfaces, suction side side surfaces and front surfaces.
  • the impeller is flowed in radially on the inside.
  • the fluid flows radially outward from the impeller.
  • a radially inward flow is formed.
  • admixtures whose densities correspond approximately to the average density of the pumped liquid, or smaller, can accumulate on the center of the impeller.
  • fibrous or textile admixtures there is a risk that the residence time in the center of the impeller will be so great that accumulations build up. This can become one Clog the pump. Therefore, there are numerous versions of free-flow pumps, which are equipped with shredders.
  • a centrifugal pump is described with a pump impeller upstream crushing device for fibrous or lumpy admixtures in the fluid.
  • the comminution device is formed by a rotating with the pump impeller cutting head and a stationary in the housing of the centrifugal pump cutting ring. Due to the upstream shredding device, however, the space in front of the impeller is reduced and the inflow into the impeller is influenced. This can have a negative effect on the pump characteristic.
  • Object of the present invention is to develop a centrifugal pump for the promotion of liquids with solid admixtures, are avoided in the blockages.
  • An attachment of fibrous components, such as textiles or films should be prevented.
  • the free passage through the pump should not be hindered.
  • the characteristic curve of the pump should not be adversely affected.
  • the blades are provided with cutting edges.
  • the blades provided with cutting edges cut through the solid admixtures, so that deposits can not occur. It is particularly advantageous if all or more blades are provided with cutting edges. In individual cases, however, it is sufficient if only one blade has a cutting edge.
  • cutting edges are formed at the locations where the front surfaces of the blades strike the side surfaces.
  • the impeller is a casting.
  • the contact points where the front surfaces and the side surfaces of the blades meet are not sharp-edged with conventional free-stream pumps. There is no defined line of contact between the front surfaces and the side surfaces but there is an area in which the surfaces merge. The area is not defined sharp-edged but it is a rounded transition.
  • At least one surface of the blades is machined such that cutting edges are formed at the contact points of the surfaces.
  • the surfaces can be processed by grinding or planing.
  • the cutting action and the wear behavior can be improved by a local hardening of the cutting edges.
  • the front surfaces of the blades are machined to form cutting edges.
  • the front surfaces are prepared by grinding or planing so that cutting edges are formed.
  • the side surfaces of the blades are formed by the casting skin.
  • the front surfaces of the blades can only be provided with a chamfer.
  • the front surfaces of the blades are preferably chamfered in the areas where the front surfaces meet the pressure-side side surfaces of the blades.
  • the cutting or tearing effect of the cutting edges is supported by the casting roughness.
  • the hard casting skin counteracts the wear.
  • the surfaces forming the cutting edges are preferably at an angle smaller than 120 ° to each other. It proves to be advantageous if the surfaces which form the cutting edges are at an angle of less than 90 ° to each other.
  • the cutting edges are formed on the contact lines, at which the front surfaces meet the pressure-side side surfaces. This will be a particularly effective Cutting effect of the edges achieved because due to the direction of rotation of the impeller, the admixtures are pressed to the pressure-side side surfaces.
  • the front surfaces of the blades are formed as winglets, which overlap the side surfaces.
  • the winglets are additional surfaces that are usually perpendicular to the blades.
  • the winglets improve the efficiency of the pump.
  • the winglets project beyond the suction-side side surfaces of the blades.
  • the winglets are provided with cutting edges. Impellers with winglets achieve their optimum effectiveness at very small blade angles. This is contrary to the cutting action. In addition, the winglets offer an additional area to which stable cutting edges can be attached.
  • blades are mounted on the winglets.
  • the blades are metal plates provided with cutting edges.
  • the blades are preferably screwed onto the winglets.
  • Another preferred variant of the invention is to provide the winglets with grooves.
  • the grooves are introduced on the inlet side surfaces of the winglets.
  • the grooves create cutting edges on the inlet side surface of the winglets.
  • the cutting edges are formed at the contact lines where the side walls of the grooves meet the surface of the winglets.
  • the flat surface of the winglets can be provided with recesses.
  • the serrated grooves can be either circular or spiral.
  • the grooves preferably have a wedge-shaped cross-sectional profile.
  • a blade extension projects beyond the winglet surface. This blade extension points towards the inlet side housing wall.
  • These blade extensions can be over-turned or ground, so that cutting edges are formed in this way. Through induction hardening, the cutting edges can be additionally strengthened.
  • blades with flat outlet-side blade angles ⁇ are preferably used. It also proves to be beneficial to use impellers with a few blades, with a number of four or fewer blades has been found to be advantageous. Impellers with a shallow blade angle and a few blades are particularly well suited, as fibers slide radially outwards and are thereby comminuted. Free-flow impellers with a steep blade angle and many blades are less well suited, since sliding against the direction of rotation is difficult.
  • a centrifugal pump in whose housing 1 a free-flow impeller 2 is positioned.
  • the free stream wheel 2 is mounted on a shaft 3.
  • the attachment of the freewheel wheel 2 is a hub body 4, in which a screw 5 engages.
  • On the support disk 6 of the freewheel wheel 2 a plurality of blades 7 are arranged. Between the free stream wheel 2 and the inlet-side housing wall 8, a blade-free space 9 is formed.
  • a freewheel wheel 2 with cutting edges 14 is shown.
  • the free stream wheel 2 turns counterclockwise.
  • blades 7 are arranged.
  • Winglets 10 are formed.
  • the winglets 10 project beyond the suction-side side surfaces 11 of the blades 7.
  • the front surfaces 12 of the blades 7 are chamfered to the pressure-side side surface 13.
  • Cutting edges 14 are formed at the contact lines between the front surfaces 12 and the pressure-side side surfaces 13 of the blades 7.
  • Fig. 2b one recognizes an exit-side blade angle ⁇ .
  • the grooves 15 are recesses in the inlet-side surfaces of the winglets 10.
  • the grooves 15 can be introduced into the surfaces of the winglets in the form of notches.
  • the grooves 15 have a wedge-shaped cross-sectional profile.
EP10001468.7A 2009-03-03 2010-02-12 Roue vortex dotée de bords coupants Active EP2226505B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009011444A DE102009011444A1 (de) 2009-03-03 2009-03-03 Freistromrad mit Schneidkanten

Publications (2)

Publication Number Publication Date
EP2226505A1 true EP2226505A1 (fr) 2010-09-08
EP2226505B1 EP2226505B1 (fr) 2013-11-27

Family

ID=42112002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10001468.7A Active EP2226505B1 (fr) 2009-03-03 2010-02-12 Roue vortex dotée de bords coupants

Country Status (5)

Country Link
EP (1) EP2226505B1 (fr)
CN (1) CN101825089B (fr)
DE (1) DE102009011444A1 (fr)
DK (1) DK2226505T3 (fr)
ES (1) ES2443550T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2441877A3 (fr) * 2010-10-15 2014-09-03 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager pour l'entretien du linge doté d'une pompe
ITMI20130608A1 (it) * 2013-04-12 2014-10-13 Pompe Rotomec S R L Girante per pompe del tipo anti-intasamento e ad alto rendimento idraulico
EP2868928A1 (fr) * 2013-10-31 2015-05-06 Sulzer Pumpen Ag Pompe centrifuge et procédé de pompage d'une substance
IT201900010632A1 (it) * 2019-07-02 2021-01-02 Dab Pumps Spa Girante perfezionata per pompa centrifuga, particolarmente per pompa del tipo a girante arretrata, e pompa con una simile girante
CN114151380A (zh) * 2021-11-15 2022-03-08 中交疏浚技术装备国家工程研究中心有限公司 一种带有间隙冲水的防缠绕旋流泵

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015212653B4 (de) * 2015-07-07 2022-03-17 BSH Hausgeräte GmbH Haushaltsgerät
CN105927581A (zh) * 2016-06-29 2016-09-07 新界泵业集团股份有限公司 适用于潜水电泵的切割式叶轮
DE102016225908A1 (de) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Freistrompumpe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692422A (en) * 1971-01-18 1972-09-19 Pierre Mengin Ets Shearing pump
US4076179A (en) * 1976-04-22 1978-02-28 Kabushiki Kaisha Sogo Pump Seisakusho Centrifugal sewage pump
WO2002008610A1 (fr) * 2000-07-25 2002-01-31 Societe Etex De Recherches Techniques, Sert Broyeur sanitaire
DE10305726A1 (de) 2002-03-14 2003-10-02 Ksb Ag Kreiselpumpe mit Zerkleinerungseinrichtung
WO2004065796A1 (fr) * 2003-01-17 2004-08-05 Ksb Aktiengesellschaft Pompe non colmatable
US20040234370A1 (en) * 2002-09-26 2004-11-25 Mark Simakaski Chopping pump impeller assembly

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55117094A (en) * 1979-03-01 1980-09-09 Kawamoto Seisakusho:Kk Pump with cutter
FI75652C (fi) * 1984-08-16 1988-07-11 Sarlin Ab Oy E Loephjul vid en pump, saerskilt vid en virvelstroempump.
JPH1193884A (ja) * 1997-09-22 1999-04-06 Ebara Corp ボルテックス形ポンプの製造方法
DE102004007739A1 (de) * 2004-02-16 2005-08-25 Wilo Ag Schneidwerk einer Kreiselpumpe
SE0402840L (sv) * 2004-11-19 2006-04-11 Itt Mfg Enterprises Inc Pumphjul
DE102004058458B3 (de) * 2004-12-03 2006-05-18 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Pumpe mit Schneidlaufrad
DE102005014348B3 (de) * 2005-03-24 2006-08-10 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Pumpe mit Schneidlaufrad und Vorzerkleinerer
JP2009293547A (ja) * 2008-06-06 2009-12-17 Shinmaywa Industries Ltd 羽根車及びボルテックスポンプ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692422A (en) * 1971-01-18 1972-09-19 Pierre Mengin Ets Shearing pump
US4076179A (en) * 1976-04-22 1978-02-28 Kabushiki Kaisha Sogo Pump Seisakusho Centrifugal sewage pump
WO2002008610A1 (fr) * 2000-07-25 2002-01-31 Societe Etex De Recherches Techniques, Sert Broyeur sanitaire
DE10305726A1 (de) 2002-03-14 2003-10-02 Ksb Ag Kreiselpumpe mit Zerkleinerungseinrichtung
US20040234370A1 (en) * 2002-09-26 2004-11-25 Mark Simakaski Chopping pump impeller assembly
WO2004065796A1 (fr) * 2003-01-17 2004-08-05 Ksb Aktiengesellschaft Pompe non colmatable

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2441877A3 (fr) * 2010-10-15 2014-09-03 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager pour l'entretien du linge doté d'une pompe
ITMI20130608A1 (it) * 2013-04-12 2014-10-13 Pompe Rotomec S R L Girante per pompe del tipo anti-intasamento e ad alto rendimento idraulico
EP2868928A1 (fr) * 2013-10-31 2015-05-06 Sulzer Pumpen Ag Pompe centrifuge et procédé de pompage d'une substance
IT201900010632A1 (it) * 2019-07-02 2021-01-02 Dab Pumps Spa Girante perfezionata per pompa centrifuga, particolarmente per pompa del tipo a girante arretrata, e pompa con una simile girante
CN112177972A (zh) * 2019-07-02 2021-01-05 戴博水泵股份有限公司 用于离心泵的叶轮以及具有这种叶轮的泵
EP3760873A1 (fr) * 2019-07-02 2021-01-06 Dab Pumps S.p.A. Turbine pour pompe centrifuge, en particulier pour une pompe du type à turbine encastrée et pompe comportant une telle turbine
US11378091B2 (en) 2019-07-02 2022-07-05 Dab Pumps S.P.A. Impeller for centrifugal pump, particularly for pump of the recessed impeller type, and pump with such an impeller
CN114151380A (zh) * 2021-11-15 2022-03-08 中交疏浚技术装备国家工程研究中心有限公司 一种带有间隙冲水的防缠绕旋流泵
CN114151380B (zh) * 2021-11-15 2024-01-09 中交疏浚技术装备国家工程研究中心有限公司 一种带有间隙冲水的防缠绕旋流泵

Also Published As

Publication number Publication date
ES2443550T3 (es) 2014-02-19
EP2226505B1 (fr) 2013-11-27
CN101825089A (zh) 2010-09-08
CN101825089B (zh) 2014-08-13
DE102009011444A1 (de) 2010-09-09
DK2226505T3 (da) 2014-01-27

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