EP1344944B1 - Pompe centrifuge avec un dispositif de broyage - Google Patents

Pompe centrifuge avec un dispositif de broyage Download PDF

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Publication number
EP1344944B1
EP1344944B1 EP03005084A EP03005084A EP1344944B1 EP 1344944 B1 EP1344944 B1 EP 1344944B1 EP 03005084 A EP03005084 A EP 03005084A EP 03005084 A EP03005084 A EP 03005084A EP 1344944 B1 EP1344944 B1 EP 1344944B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
cutting
cutting head
pump according
impeller
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
EP03005084A
Other languages
German (de)
English (en)
Other versions
EP1344944A1 (fr
Inventor
Jean Francois Devulder
Christoph Jaeger
Louis Symoens
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
Priority claimed from DE10305726A external-priority patent/DE10305726A1/de
Application filed by KSB AG filed Critical KSB AG
Publication of EP1344944A1 publication Critical patent/EP1344944A1/fr
Application granted granted Critical
Publication of EP1344944B1 publication Critical patent/EP1344944B1/fr
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
    • 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
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating

Definitions

  • the invention relates to a centrifugal pump with a pump impeller upstream shredding device for fibrous or lumpy Admixtures in the conveying liquid, whereby the comminution device by one rotating with the pump impeller, with several cutting edges provided cutting head and a cooperating with the cutting head, Formed in the housing of the centrifugal pump arranged cutting insert becomes.
  • centrifugal pump is previously known from DE 37 03 647 C2.
  • These learned pump has a cutting insert that has a plurality of teeth is provided, which is in the of the cutting edges of the rotating part coated area.
  • the leading edges of the downstream of the Shredder blades of the impeller are exposed, such as it basically with the shredding devices of this type equipped centrifugal pumps is the case.
  • can add admixtures to the leading edges after passing the Shredding device have a reduced extension, but that are still large enough to be held by a leading edge.
  • the Accumulations lead to a deterioration in the conveying properties of the affected centrifugal pump; in extreme cases, they can cause constipation and cause serious damage.
  • the invention has for its object a centrifugal pump of the beginning mentioned type to create the risk of deterioration shown their conveying properties or even the constipation caused by co-promoted Admixtures overcome.
  • the cutting head with several, essentially axially extending, delimited by webs Recesses is provided, the webs equipped with cutting edges cover the leading edges of the blades of the impeller and a stepless one Own transition to the contour of the blades while the recesses have a smooth transition to the channels of the impeller.
  • the design according to the invention has the advantage that edges on which Additions could accumulate, are not available. This applies equally for centrifugal pumps, the impellers of which are in one piece Cutting head are equipped, as well as for versions in which the Cutting head is interchangeably arranged. Because even in the latter case the leading edge is completely covered by the contour of the cutting head.
  • a configuration which is advantageous for special purposes is characterized by a cutting head with one or more on its suction end arranged blades is equipped. This will remove one from the impeller directed partial flow is generated, which is suitable in the liquid whirl up solid substances contained. This is particularly advantageous when viewed vertically centrifugal pumps sucking in a container: admixtures that are on the ground could settle, are whirled up and guided by the impeller Main stream fed.
  • the cutting head can be one of the number of recesses or the number the webs of the cutting insert located between the recesses have different number of cutting edges. This allows one Adaptation of the cutting head to the number of blades on the impeller maintaining the shape and properties of the cutting insert.
  • the cutting edges of the cutting head and the cutting insert can have different forms of the course.
  • the Cutting edges run parallel to the axis or helically.
  • the course forms can also be different for the cutting head and cutting insert.
  • the cutting head and cutting insert are advantageous equally equipped with helical cutting edges are, but with the screw vectors of the two cutting edge designs are directed towards each other.
  • the invention is not only suitable for impellers with a suction and one pressure side cover plate. It can also be used advantageously with such wheels use, which themselves have only a pressure-side cover plate, the suction-side cover plate, however, quasi through a housing wall or as Cover plate designed part of the housing wall is formed.
  • the one between the Paddles of the impeller and the cover plate fixed to the housing is formed expediently designed to be adjustable.
  • the separate design of the cutting insert and cutting head has the advantage that for these parts that are particularly subject to wear, a harder part Material can be used as for the impeller and housing. at wear of the parts mentioned is also a simple, comparative inexpensive replacement possible.
  • the non-rotatable connection between the cutting head and the impeller as well between the cutting insert and the housing of the centrifugal pump advantageously each via a pin.
  • the centrifugal pump 2 of FIG. 1 driven by an electric motor 1 has a Impeller 5 arranged in a housing 3 on a shaft 4.
  • the impeller 5 is connected to a cutting head 8 by a screw 6 and a pin 7.
  • the the entry of the impeller 5 upstream cutting head 8 is comprised by a cutting insert 10 connected to the housing 3 via screws 9.
  • the impeller 5 shown as a detail in FIG. 2 has four blades 11, between which channels 12 are formed.
  • the blades 11 are on the pressure-side cover plate 13 of the impeller 5 is arranged.
  • a suction side The impeller 5 itself does not have a cover disk.
  • a suction-side cover plate 14 As shown in FIG. 1, it is inserted into the housing 3 and via screws 15 associated with this.
  • the cutting head 8 of FIG. 3 has four webs 16, on the respective cutting edges 17 are provided.
  • the webs 16 cover the leading edges of the blades 11 completely.
  • the recesses 18 can also have a different course, for example a helical one. In in any case, however, the recesses 18 are stepless in their full width the channels 12 of the impeller 5 over.
  • the cutting insert 10 of FIGS. 4 and 5 has one towards the cutting head 8 open axial access 19.
  • the cutting insert 10 is also with Provided recesses 20 which provide additional radial access to the Open the fluid to the cutting head 8.
  • In the inner wall of the Cutting insert 10 is a over the entire axial extent of the Cutting insert 10 incorporated helical groove 21.
  • the groove 21 helps to improve the size reduction and the promotion of Additions at.
  • Fig. 6 shows a cutting head 22, which in its basic structure Cutting head 8 corresponds.
  • the cutting head 22 also has an over the cutting insert 10 projecting cylinder 23, which acts as a carrier of four blades 24 acts.
  • the blades 24 are otherwise with the suction side of the Centrifugal pump 2 facing the end of the webs 16 connected.
  • the blades 24 have a sloping towards the outer diameter of the cutting head 22 Course.
  • the blades 24, like the cylinder 23, are included with rounded edges.
  • the blade shape and the rounding of the Edges serve to adhere rags, braid-like structures or to prevent something similar.
  • the actual function of the blades 24 is, with one - not shown - a container with a centrifugal pump arranged vertically therein Deposits of the conveyed liquid on the bottom of the container avoid. This happens because the blades 24 have a partial flow generate that acts in the direction of the bottom of the container and whirl up there sedative admixtures caused. The admixtures are thereby from the main flow directed to the impeller 5 and finally the im essentially formed by the cutting head 22 and the cutting insert 10 Comminution device supplied, crushed there and from the blades 11 the impeller 5 in a line - also not shown - promoted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)

Claims (17)

  1. Pompe centrifuge avec un dispositif de broyage monté avant le rotor de la pompe pour des mélanges fibreux ou en morceaux dans le liquide refoulé, le dispositif de broyage étant formé par une tête de coupe tournant avec le rotor de la pompe, pourvue de plusieurs arêtes de coupe et d'un élément de coupe coopérant avec la tête de coupe, disposé de manière fixe dans le corps de la pompe centrifuge, caractérisée en ce que la tête de coupe (8, 22) est pourvue de plusieurs évidements (18) s'étendant essentiellement axialement, limités par des ailes (16), les ailes (16) pourvues des arêtes de coupe (17) recouvrant les arêtes d'attaque des aubes (11) du rotor (5) et possédant une transition continue vers le contour des aubes (11), tandis que les évidements (18) possèdent une transition continue vers les conduits (12) du rotor (5).
  2. Pompe centrifuge selon la revendication 1, caractérisée par une tête de coupe (22) qui est pourvue d'une ou de plusieurs aubes (24) disposées sur son côté frontal du côté de l'aspiration.
  3. Pompe centrifuge selon la revendication 2, caractérisée en ce que les aubes (24) de la tête de coupe possèdent une allure diminuant vers le diamètre extérieur de la tête de coupe (22).
  4. Pompe centrifuge selon la revendication 2 ou 3, caractérisée en ce que les aubes (24) de la tête de coupe sont connectées à un cylindre (23) saillant au-delà de l'élément de coupe (10).
  5. Pompe centrifuge selon l'une quelconque des revendications 2 à 4, caractérisée en ce que les aubes (24) de la tête de coupe et/ou le cylindre (23) sont pourvus d'arêtes arrondies.
  6. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de coupe (10) est ouvert pour un écoulement dans la direction axiale en direction de la tête de coupe (8, 22) et possède des évidements (20) pour un écoulement dans la direction radiale vers la tête de coupe (8, 22).
  7. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce que la tête de coupe (8, 22) possède un nombre d'évidements (18) différent du nombre des évidements (20) de l'élément de coupe (10).
  8. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce que les arêtes de coupe (17) de la tête de coupe (8, 22) et/ou de l'élément de coupe (10) s'étendent avec leurs axes parallèles.
  9. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce que les arêtes de coupe (17) de la tête de coupe (8, 22) et/ou de l'élément de coupe (10) s'étendent suivant une forme hélicoïdale.
  10. Pompe centrifuge selon la revendication 9,
    caractérisée en ce que pour une allure hélicoïdale des arêtes de coupe (17) de la tête de coupe (8, 22) et de l'élément de coupe (10), les vecteurs hélicoïdaux de la tête de coupe (8, 22) et de l'élément de coupe (10) sont orientés les uns vers les autres.
  11. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée par un rotor (5), qui est réalisé du côté de l'aspiration sans disque de recouvrement entraíné en rotation et qui possède en face d'un disque de recouvrement (14) disposé fixement dans le carter (3) de la pompe centrifuge (2), une fente ajustable.
  12. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de coupe (10) est connecté de manière remplaçable au disque de recouvrement (13) fixé dans le carter (3).
  13. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce que la tête de coupe (8, 22) est réalisée d'une seule pièce avec le rotor (5).
  14. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce que la tête de coupe (8, 22) est réalisée d'une seule pièce avec le disque de recouvrement (13) du rotor (5) du côté refoulement.
  15. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce que la tête de coupe (8, 22) est connectée de manière remplaçable au disque de recouvrement (13) du rotor (5) du côté refoulement.
  16. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une liaison fixe en rotation de l'élément de coupe (10) et/ou de la tête de coupe (8, 22) s'effectue à chaque fois par le biais d'une goupille (7).
  17. Pompe centrifuge selon l'une quelconque des revendications précédentes, caractérisée par une rainure (21) s'étendant sous forme hélicoïdale sur toute l'étendue axiale de l'élément de coupe (10) dans la paroi interne de l'élément de coupe (10).
EP03005084A 2002-03-14 2003-03-07 Pompe centrifuge avec un dispositif de broyage Expired - Lifetime EP1344944B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10211096 2002-03-14
DE10211096 2002-03-14
DE10305726 2003-02-12
DE10305726A DE10305726A1 (de) 2002-03-14 2003-02-12 Kreiselpumpe mit Zerkleinerungseinrichtung

Publications (2)

Publication Number Publication Date
EP1344944A1 EP1344944A1 (fr) 2003-09-17
EP1344944B1 true EP1344944B1 (fr) 2004-06-02

Family

ID=27766699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03005084A Expired - Lifetime EP1344944B1 (fr) 2002-03-14 2003-03-07 Pompe centrifuge avec un dispositif de broyage

Country Status (2)

Country Link
EP (1) EP1344944B1 (fr)
AT (1) ATE268436T1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113670A2 (fr) 2008-04-30 2009-11-04 KSB Aktiengesellschaft Pompe centrifuge avec un dispositif de broyage
DE102016225921A1 (de) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Abwasserhebeanlage mit Schneidwerk
DE102016225920A1 (de) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Kreiselpumpe mit einer Zerkleinerungsanordnung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9475059B2 (en) 2013-03-15 2016-10-25 Pentair Flow Technologies, Llc Cutting blade assembly
WO2017189741A1 (fr) 2016-04-26 2017-11-02 Pentair Flow Technologies, Llc Ensemble de coupe pour une pompe hacheuse
LU102842B1 (de) * 2021-06-24 2022-12-29 Wilo Se Schneidkopf einer Pumpe
LU102841B1 (de) * 2021-06-24 2022-12-27 Wilo Se Anordnung umfassend ein Laufrad und einen Schneidkopf für mit Feststoff belastete Flüssigkeit einer Pumpe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444818A (en) * 1966-10-10 1969-05-20 Robert W Sutton Centrifugal pump
US4456424A (en) * 1981-03-05 1984-06-26 Toyo Denki Kogyosho Co., Ltd. Underwater sand pump
SE444969B (sv) * 1982-10-11 1986-05-20 Flygt Ab Centrifugalpump avseddd for pumpning av vetskor innehallande fasta partiklar
DE3703647A1 (de) * 1987-02-06 1988-08-18 Klein Schanzlin & Becker Ag Kreiselpumpe fuer verunreinigte fluessigkeiten
US4904159A (en) * 1988-07-18 1990-02-27 Suburbia Systems, Inc. Pump impeller
US5016825A (en) * 1990-02-14 1991-05-21 Mcneil (Ohio) Corporation Grinding impeller assembly for a grinder pump
CH689058A5 (de) * 1994-11-28 1998-08-31 Haeny & Cie Ag Kreiselpumpe fuer mit Feststoffanteilen belastete Abwaesser.
GB9612201D0 (en) * 1996-06-11 1996-08-14 Sweepax International Limited Rotodynamic pump
DE19834815A1 (de) * 1998-08-01 2000-02-10 Orpu Gmbh Pumpe mit einer Schneideinrichtung zum Fördern eines mit festen Bestandteilen vermischten Fördermediums

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113670A2 (fr) 2008-04-30 2009-11-04 KSB Aktiengesellschaft Pompe centrifuge avec un dispositif de broyage
DE102008021767A1 (de) 2008-04-30 2009-11-05 Ksb Aktiengesellschaft Kreiselpumpe mit Zerkleinerungseinrichtung
DE102016225921A1 (de) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Abwasserhebeanlage mit Schneidwerk
DE102016225920A1 (de) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Kreiselpumpe mit einer Zerkleinerungsanordnung
WO2018114511A1 (fr) 2016-12-21 2018-06-28 KSB SE & Co. KGaA Installation de relevage d'eaux usées comprenant un mécanisme de coupe
WO2018114507A1 (fr) 2016-12-21 2018-06-28 KSB SE & Co. KGaA Pompe centrifuge pourvue d'un système de broyage

Also Published As

Publication number Publication date
EP1344944A1 (fr) 2003-09-17
ATE268436T1 (de) 2004-06-15

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