EP0278388B1 - Kreiselpumpe für verunreinigte Flüssigkeiten - Google Patents

Kreiselpumpe für verunreinigte Flüssigkeiten Download PDF

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Publication number
EP0278388B1
EP0278388B1 EP88101578A EP88101578A EP0278388B1 EP 0278388 B1 EP0278388 B1 EP 0278388B1 EP 88101578 A EP88101578 A EP 88101578A EP 88101578 A EP88101578 A EP 88101578A EP 0278388 B1 EP0278388 B1 EP 0278388B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
rotary part
cutting
openings
ring
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
EP88101578A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0278388A2 (de
EP0278388A3 (en
Inventor
Peter Rupprecht
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6320396&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0278388(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KSB AG filed Critical KSB AG
Publication of EP0278388A2 publication Critical patent/EP0278388A2/de
Publication of EP0278388A3 publication Critical patent/EP0278388A3/de
Application granted granted Critical
Publication of EP0278388B1 publication Critical patent/EP0278388B1/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
    • 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 according to the preamble of the claim.
  • Such a centrifugal pump is known from CH-C-423 489.
  • This centrifugal pump has a cutting ring which is arranged in front of the inlet opening of the impeller and which cooperates with a cutting piece which is resiliently pressed against it.
  • the cutting ring can be designed as a flat, conical or also as a cylindrical part. With a cylindrical design of the cutting ring, the cutting piece can be arranged on the inside or the outside of the cylinder.
  • the function of the cutting element is common to all versions: solids from the suction of the centrifugal pump against the openings of the cutting ring are guided to the cutting element and, in the best case, shredded there.
  • the solid part is so solid or so large that it cannot be crushed in a first cutting process, it is fed to the cutting piece as often and until it is reduced to a dimension that falls below the opening size of the cutting ring.
  • it is flexibly suspended. It is lifted out of its normal position by all admixtures that cannot be crushed in the first pass. This can lead to larger lobes covering the cutting ring and in an extreme case block all openings to the fear of closing the inlet to the centrifugal pump.
  • Comminution devices are also already known which act as cutting and grinding mechanisms upstream of the impeller of the centrifugal pump.
  • FR-A-2 333 140 may serve as an example of a variety of such devices. All these facilities have in common the fact that they restrict the suction mouth of the impeller. Their operation requires high torques and therefore powerful drive motors in order to choke the shredded material through the device.
  • the crushing devices which act as cutting and grinding mechanisms, tend to form braids from the solid admixtures of the conveyed liquid, which in turn can lead to a blockage of the flow.
  • the invention has for its object to provide a centrifugal pump with a comminution device that achieves a safe cutting and conveying effect for the solid components of the conveyed material with little effort for the parts used and a comparatively small drive power.
  • the parts to be used for the subject matter of the invention are simple to manufacture and can also be installed in many existing centrifugal pumps.
  • the shredding device according to the invention does not restrict the suction mouth. It performs a real cutting process, the cut goods can be immediately removed via the impeller.
  • the impeller (1) in the centrifugal pump is attached to a shaft (2).
  • the shaft (2) also carries the rotating part (4) of a cutting device fastened with a screw (3).
  • Radial openings (5) are arranged in the peripheral part (4).
  • the peripheral part (4) is enclosed by a ring (7) fastened to the suction-side housing wall (6) and provided with several teeth (8).
  • the teeth (8) are located in the area covered by the openings (5) of the peripheral part (4).
  • an object in the delivery liquid for example a rag
  • the suction of the impeller (1) When the centrifugal pump is running, an object in the delivery liquid, for example a rag, is attracted by the suction of the impeller (1) and thus reaches the area of the cutting device formed by the ring (7) and the peripheral part (4).
  • the object is first held by the ring (7) and broken down into small pieces which can be conveyed by the impeller (1) through the cooperating edges of the openings (5) and the teeth (8). This is done in that the parts of the solid entering the openings (5) are gripped and separated with a pulling cut.
  • the openings (5) can also be oval, diamond-shaped or slit-shaped.
  • the shape of the teeth (8) of the ring (7) can also be designed differently than in the exemplary embodiment. Chilled cast iron, sintered metal or hardened tool steel can be used as the material for the cutting device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP88101578A 1987-02-06 1988-02-04 Kreiselpumpe für verunreinigte Flüssigkeiten Expired - Lifetime EP0278388B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873703647 DE3703647A1 (de) 1987-02-06 1987-02-06 Kreiselpumpe fuer verunreinigte fluessigkeiten
DE3703647 1987-02-06

Publications (3)

Publication Number Publication Date
EP0278388A2 EP0278388A2 (de) 1988-08-17
EP0278388A3 EP0278388A3 (en) 1988-09-14
EP0278388B1 true EP0278388B1 (de) 1991-10-16

Family

ID=6320396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101578A Expired - Lifetime EP0278388B1 (de) 1987-02-06 1988-02-04 Kreiselpumpe für verunreinigte Flüssigkeiten

Country Status (2)

Country Link
EP (1) EP0278388B1 (enrdf_load_stackoverflow)
DE (1) DE3703647A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128281A1 (de) * 1991-08-27 1993-03-04 Abs Pumpen Ag Pumpenaggregat
DE4438841C2 (de) * 1994-11-02 1999-05-27 Orpu Gmbh Pumpe mit einer Schneideinrichtung
GB9612201D0 (en) 1996-06-11 1996-08-14 Sweepax International Limited Rotodynamic pump
EP1344944B1 (de) * 2002-03-14 2004-06-02 KSB Aktiengesellschaft Kreiselpumpe mit Zerkleinerungseinrichtung
DE102008057233A1 (de) 2008-11-10 2010-05-12 Orpu Pumpenfabrik Gmbh Vorrichtung zum Zerkleinern von in flüssigen Medien befindlichen Bestandteilen
DE102011018434B4 (de) * 2011-04-16 2022-05-25 Wilo Se Kreiselpumpe mit Schneidwerk
DE102016225920A1 (de) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Kreiselpumpe mit einer Zerkleinerungsanordnung
DE102016225921A1 (de) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Abwasserhebeanlage mit Schneidwerk

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528853A1 (de) * 1962-10-12 1969-12-04 Schade Geb Feissel Hertha Kreiselpumpe fuer verunreinigte Fluessigkeiten mit Zerkleinerungseinrichtung
DE1453750A1 (de) * 1964-05-29 1969-03-06 Josef Eisele Schneidwerk in der Ansaugleitung einer Guellenpumpe
DE2411043A1 (de) * 1974-03-08 1975-09-18 Abs Pumps Ltd Abwasserpumpe
DE2518179A1 (de) * 1975-04-24 1976-11-04 Bbc Brown Boveri & Cie Zerkleinerungsvorrichtung fuer im ansaugstrom einer fluessigkeitspumpe mitgefuehrte schmutz- und/oder feststoffe
GB1568388A (en) * 1975-11-29 1980-05-29 Blum A Pump with comminuating means at the inlet
DE2553823C2 (de) * 1975-11-29 1984-06-14 Albert 5204 Lohmar Blum Abwasserpumpe
DE2612910A1 (de) * 1976-03-26 1977-09-29 Albert Blum Abwasserpumpe
US4143990A (en) * 1977-04-29 1979-03-13 Atencio Francisco J G Dam with movable hydroelectric assembly
DE3340295A1 (de) * 1983-11-08 1985-05-15 Albert 5204 Lohmar Blum Pumpe zum foerdern von mit stueckigen verunreinigungen durchsetzten fluessigkeiten

Also Published As

Publication number Publication date
EP0278388A2 (de) 1988-08-17
DE3703647A1 (de) 1988-08-18
EP0278388A3 (en) 1988-09-14
DE3703647C2 (enrdf_load_stackoverflow) 1992-05-27

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