EP2535590A2 - Pompe centrifuge avec barre de coupe intégrée - Google Patents

Pompe centrifuge avec barre de coupe intégrée Download PDF

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Publication number
EP2535590A2
EP2535590A2 EP12168834A EP12168834A EP2535590A2 EP 2535590 A2 EP2535590 A2 EP 2535590A2 EP 12168834 A EP12168834 A EP 12168834A EP 12168834 A EP12168834 A EP 12168834A EP 2535590 A2 EP2535590 A2 EP 2535590A2
Authority
EP
European Patent Office
Prior art keywords
impeller
cutting
centrifugal pump
motor
pump assembly
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.)
Withdrawn
Application number
EP12168834A
Other languages
German (de)
English (en)
Other versions
EP2535590A3 (fr
Inventor
Rolf Witzel
Christoph Jäger
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 SE and Co KGaA
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 EP2535590A2 publication Critical patent/EP2535590A2/fr
Publication of EP2535590A3 publication Critical patent/EP2535590A3/fr
Withdrawn legal-status Critical Current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
    • F04D29/18—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
    • 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

Definitions

  • the invention relates to a centrifugal pump assembly with a cutting mechanism, which is arranged in front of the inflow of the medium in an impeller, the cutting mechanism having a cutting surface with openings through which the medium flows and has a rotating cutting body, which abuts the cutting surface, wherein the cutting body and the Impeller be put together by a motor in rotation.
  • the pumps and piping When pumping municipal sewage with coarse and fibrous admixtures, the pumps and piping must be very large in size so that they have a sufficiently large cross-section to prevent clogging.
  • the pumps and pipelines take up a lot of space and represent a high investment requirement.
  • the cutting unit In order to be able to use even smaller pumps and pipelines, a cutting unit must be used to prevent clogging, as in the DE 20 2009 003 995 U1 is described.
  • the cutting unit is installed in the pipeline via a flange connection.
  • the cutting mechanism has a cutting surface with openings.
  • the medium flows through the openings.
  • a rotating cutting body In front of the cutting surface, a rotating cutting body is arranged, which abuts against the cutting surface and the openings extends over its rotation.
  • the cutting body is driven by a motor.
  • the medium enters the cutting unit through an inlet opening, is deflected by 90 ° and then exits through an outlet opening.
  • the minced Medium can then be supplied to a pump.
  • the cutting unit is an additional separate component with its own drive, which is installed in the pipeline in front of the pump.
  • centrifugal pumps are used with integrated cutting unit.
  • the DE 196 43 729 A1 describes a device for the promotion of manure.
  • the device has a housing designed as a double-chamber container.
  • the dual-chamber container is separated by a liquid-permeable partition into a settling chamber and an outlet space.
  • the liquid-permeable partition wall forms a cutting unit with a rotating cutting element.
  • a drive shaft drives a rotary pump and the cutting element.
  • the present invention seeks to provide a centrifugal pump with integrated cutting, which has a high efficiency and their cutting ensures a high cutting efficiency even over long periods of operation.
  • the motor is associated with a control device which can circulate the impeller and the cutting body at intervals in different directions of rotation, wherein the blades of the impeller extend in a purely radial direction, so that the centrifugal pump in both directions of rotation the same characteristic having.
  • the centrifugal pump assembly includes an impeller driven by a shaft that is rotated by a motor.
  • the centrifugal pump arrangement comprises a control device which is set up to operate the motor in different directions of rotation. As a result, run the impeller and the cutting body together at intervals in changing rotational directions.
  • the regular reversal of direction can be done by an electric motor with a corresponding rear derailleur as a control device, which are suitable as an electric motor, in particular a three-phase synchronous motor, an asynchronous motor, a DC motor or an AC motor.
  • the reversal of direction causes a self-sharpening effect of the cutting unit.
  • the running cutting edges of the rotating cutting body and the cutting surface are sharpened while the leading edges wear out.
  • a regular change of the direction of rotation ensures that the cutting ability is maintained. This ensures a long life of the cutting unit.
  • an impeller is used whose blades extend straight from the axis of rotation to the outside.
  • a rotational direction-independent conveying characteristic of the centrifugal pump is achieved.
  • the characteristic curve and the power consumption and thus the impeller effect are the same in both directions of rotation.
  • the flow space between the impeller and the housing is formed mirror-symmetrically to the discharge nozzle axis.
  • the impeller is surrounded by an annular space housing.
  • annular space housing By such a housing, in contrast to a spiral housing, a direction of rotation-independent conveying characteristic is achieved.
  • the pump characteristic and the efficiency curve of the centrifugal pump are identical in both directions of rotation.
  • the cutting body is rotatably connected to the impeller. It proves to be particularly advantageous if the cutting body is fastened via a fastening means on the end face of the shaft which drives the impeller.
  • a bore through the cutting body, the impeller and the shaft is introduced centrally of the axis of rotation of the shaft, which receives the fastener.
  • the fastening means is preferably designed as a screw.
  • the bore has a thread in the region of the impeller and / or the shaft into which the screw engages.
  • the cutting body can also be connected by means of a pin with the impeller rotationally fixed.
  • the cutting surface is integrated in the suction cover of the centrifugal pump and fills the entire intake cross-sectional area of the suction nozzle.
  • Fig. 1 shows a centrifugal pump with integrated cutting unit 1.
  • the cutting unit 1 is located in front of the inflow of the medium in the impeller 2 ,.
  • the cutting unit 1 comprises a fixed cutting surface 3 and a rotating cutting body 4.
  • the cutting surface 3 is executed in the embodiment as a circular, flat cutting plate having openings 5 through which the medium flows.
  • the cutting surface 3 is integrated in the suction cover 6 of the centrifugal pump and fills the entire inflow cross-sectional area.
  • the cutting body 4 rotates and thereby passes over the openings 5.
  • the cutting body 4 comprises knives 7, which rest on the cutting surface 3. They are pressed with a contact force F against the cutting surface 3.
  • the cutting body 4 is fixed to the end face of a shaft 8.
  • the cutting body 4 and the impeller 2 are provided centrally to its axis of rotation with a bore 9, which continues in the end face of the shaft 8.
  • a fastener 10 is inserted in the hole 9, a fastener 10 is inserted.
  • the fastening element 10 is a screw which engages in a thread which has the bore 9 in the region of the shaft 8.
  • the cutting body 4 is rotatably connected to the impeller 2 and the shaft 8.
  • the shaft 8 is driven by a motor 11.
  • This is an electric motor comprising a stator 12 and a rotor 13.
  • the motor 11 is surrounded by a motor housing 14.
  • the impeller 2 is surrounded by a housing 15.
  • the blades 16 of the impeller 2 are integrally formed on a cover plate 17. Through the discharge port 18, the medium leaves the centrifugal pump.
  • the required for mounting division of the motor housing 14 from the housing 15 is not shown for reasons of clarity.
  • the impeller 2 and the cutting body 4 are rotated together by the motor 11 in rotation.
  • the cutting body 4 is pressed with a force F against the cutting surface 3.
  • a control device is associated with the motor 11, which rotates the impeller 2 and the cutting body 4 at intervals in opposite directions of rotation.
  • the time intervals for each direction of rotation are the same length.
  • Fig. 2 shows a front view of the cutting unit 1.
  • the cutting surface 3 is designed as a circular cutting plate, which is provided with openings 5 through which the medium flows.
  • the cutting body 4 comprises four wings 19, which cover the openings 5, the cutting surface 3.
  • the wings 19 are integrally formed on a cylindrical base body 20 and extending from the axis of rotation straight in the purely radial direction to the outside.
  • Each wing 19 has at its the cutting surface 3 facing Page a knife 7 on.
  • the knives 7 of the cutting body 4 lie directly against the cutting surface 3.
  • the cutting body 4 is fastened via a fastening means 10 on the end face of the shaft 8.
  • a screw is used as a fastening means 10.
  • Fig. 3 shows a radial section of the impeller 2 and the housing 15.
  • the blades 16 of the impeller 2 are integrally formed on a cover plate 17 and run in a star shape toward the axis of rotation. They are formed in a straight line in a purely radial direction and thus do not show the usual curve with centrifugal pumps.
  • the arrangement of the blades 16 is mirror-symmetrical to the pressure nozzle axis 21st
  • the medium enters the impeller 2, flows past the blades 16 and leaves the centrifugal pump through the discharge nozzle 18.
  • the impeller 3 is fixed by means of a fastening means 10 on the end face of the shaft 8.
  • the impeller 2 is surrounded by a housing 15, which is designed according to the invention as an annular housing, so that the impeller 2 has the same conveying characteristic in both directions of rotation.
  • the flow space 23 between the impeller 2 and the housing 15 is mirror-symmetrical to the discharge nozzle axis 21.
  • Fig. 4 shows a perspective view of a centrifugal pump with integrated cutting unit 1.
  • the cutting edges are formed directly on the wings 19, so that no additional knives 7 are required in contrast to the variant described above.
  • the wings 19 are located directly on the cutting surface 3.
  • the wings 19 are integrally formed on a cylindrical base body 20 and extend in a star shape to the outside.
  • the suction cover 6 has a recess into which the cutting surface 3 designed as a circular cutting insert fits flush. Through the openings 5 the cutting plate 3, the medium is sucked. During rotation, the wings 19 of the cutting body 4 overlap the openings 5.
  • the impeller 2 has blades 16 which extend in a straight line in the purely radial direction to the outside.
  • the blades 16 are formed as cuboid elevations on the cover plate 17 of the impeller 2.
  • the impeller 2 and the cutting body 4 are in the in Fig. 4 variant shown connected via a pin 24 rotatably connected to each other.
  • the impeller 2 is rotated by the shaft 8. Due to the connection of the impeller 2 with the cutting body 4 via the pin 24, the cutting body 4 rotates at the same speed as impeller 2 and shaft eighth
  • the cutting body 4 is arranged axially displaceably on a piston 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Food Science & Technology (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP12168834.5A 2011-06-15 2012-05-22 Pompe centrifuge avec barre de coupe intégrée Withdrawn EP2535590A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011077545A DE102011077545A1 (de) 2011-06-15 2011-06-15 Kreiselpumpe mit integriertem Schneidwerk

Publications (2)

Publication Number Publication Date
EP2535590A2 true EP2535590A2 (fr) 2012-12-19
EP2535590A3 EP2535590A3 (fr) 2018-03-21

Family

ID=46168177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12168834.5A Withdrawn EP2535590A3 (fr) 2011-06-15 2012-05-22 Pompe centrifuge avec barre de coupe intégrée

Country Status (3)

Country Link
EP (1) EP2535590A3 (fr)
CN (1) CN102889248A (fr)
DE (1) DE102011077545A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104533844B (zh) * 2014-12-25 2017-12-01 东营国安化工有限公司 一种污水泵介质分离罩及其构成的排污泵及介质分离方法
CN106907327B (zh) * 2017-04-26 2019-06-25 佛山市肯富来工业泵有限公司 泵站的排污泵防堵塞系统及控制部件控制切割部件的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2313403A1 (de) 1972-03-20 1973-10-04 Tec Group Axial-stroemungsmaschine
DE2536555A1 (de) 1974-08-23 1976-03-04 Peabody Barnes Pumpvorrichtung mit zerkleinerer
DE19643729A1 (de) 1996-10-23 1998-04-30 Sebastian Zunhammer Pumpe
DE202009003995U1 (de) 2009-03-25 2010-08-19 Hugo Vogelsang Maschinenbau Gmbh Schneidvorrichtung

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714354A (en) * 1952-09-08 1955-08-02 Orrin E Farrand Pump
US3973866A (en) * 1975-01-02 1976-08-10 Vaughan Co., Inc. Centrifugal chopping slurry pump
NL163703C (nl) * 1975-09-29 1980-10-15 Kamps De Wild B V Inrichting voor het verwerken van vloeibare mest, in het bijzonder mengmest.
SU715826A1 (ru) * 1978-07-31 1980-02-15 Центральный Научно-Исследовательский Институт Механизации И Электрификации Сельского Хозяйства Нечерноземной Зоны Ссср Центробежный насос
GB2081382B (en) * 1980-07-18 1984-04-18 Neu Eng Etd Fans provided with cutting knives
US4842479A (en) * 1981-01-29 1989-06-27 Vaughan Co., Inc. High head centrifugal slicing slurry pump
US5044566A (en) * 1989-12-27 1991-09-03 General Signal Corporation Sewage pump with self-adjusting cutters
DE9207883U1 (fr) * 1992-04-03 1992-08-06 Sihi Gmbh & Co Kg, 2210 Itzehoe, De
DE59703018D1 (de) * 1997-10-25 2001-03-29 Orpu Gmbh Pumpe mit einer Schneideinrichtung
DE29910596U1 (de) * 1999-06-17 1999-09-09 Hugo Vogelsang Maschinenbau Gm Vorrichtung zum Zerkleinern von Feststoffen in inhomogenen Flüssigkeiten
DE202005011680U1 (de) * 2005-07-26 2005-12-15 Herberg, Friedrich, Dr.-Ing. Kreiselpumpe mit Schneideinrichtung für fasrige Fremdstoffe
CN2929263Y (zh) * 2006-06-08 2007-08-01 上海连成（集团）有限公司 具有切割和反冲洗双重功效的污水泵
CN201255138Y (zh) * 2008-05-27 2009-06-10 深圳市兴日生实业有限公司 配置叶轮刀片的离心水泵叶轮组件
US8562287B2 (en) * 2009-06-23 2013-10-22 Zoeller Pump Company, Llc Grinder pump
CN201763664U (zh) * 2010-08-24 2011-03-16 开利泵业(集团)有限公司 潜污泵用切割装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2313403A1 (de) 1972-03-20 1973-10-04 Tec Group Axial-stroemungsmaschine
DE2536555A1 (de) 1974-08-23 1976-03-04 Peabody Barnes Pumpvorrichtung mit zerkleinerer
DE19643729A1 (de) 1996-10-23 1998-04-30 Sebastian Zunhammer Pumpe
DE202009003995U1 (de) 2009-03-25 2010-08-19 Hugo Vogelsang Maschinenbau Gmbh Schneidvorrichtung

Also Published As

Publication number Publication date
DE102011077545A1 (de) 2012-12-20
EP2535590A3 (fr) 2018-03-21
CN102889248A (zh) 2013-01-23

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