EP3090185B1 - Pompe centrifuge à dispositif de coupe - Google Patents

Pompe centrifuge à dispositif de coupe Download PDF

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Publication number
EP3090185B1
EP3090185B1 EP15713648.2A EP15713648A EP3090185B1 EP 3090185 B1 EP3090185 B1 EP 3090185B1 EP 15713648 A EP15713648 A EP 15713648A EP 3090185 B1 EP3090185 B1 EP 3090185B1
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EP
European Patent Office
Prior art keywords
impeller
cutting
centrifugal pump
pump according
cutting insert
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.)
Active
Application number
EP15713648.2A
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German (de)
English (en)
Other versions
EP3090185A1 (fr
Inventor
Alfred J. Otto
Wolfgang Geier
Wolfgang Strössner
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.)
Wilo SE
Original Assignee
Wilo SE
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Publication date
Application filed by Wilo SE filed Critical Wilo SE
Priority to PL15713648T priority Critical patent/PL3090185T3/pl
Publication of EP3090185A1 publication Critical patent/EP3090185A1/fr
Application granted granted Critical
Publication of EP3090185B1 publication Critical patent/EP3090185B1/fr
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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

Definitions

  • the invention relates to a centrifugal pump, in particular a waste water or dirty water motor pump with an impeller, the end face of which facing the pump suction opening forms an opening and the impeller end face facing away from the suction opening is covered by a support disk, on which the curved blades are attached, in particular molded.
  • centrifugal pumps are known in which a cutting device is arranged in front of the impeller, the rotatable cutting part of which sits on the pump shaft. Furthermore, from the DE 26 34 683 , of the CH 411 584 A , of the U.S. 4,778,336 A , of the U.S. 3,096,718 A each known to form the leading edges of the blades of an impeller as cutting edges. With these known sewage pumps it has been shown that clogging still occurs with coarse raw waste and especially with long-fiber textile residues.
  • the EP 0395 604 A1 also discloses radially sealing the impeller in the suction mouth of the pump with a non-rotatable insert which surrounds the rotating cutting device.
  • the object of the invention is to improve a centrifugal pump of the type mentioned at the outset in such a way that it is largely free of clogging at a high flow rate.
  • the cutting insert fills the opening of the impeller facing away from the motor with a cylindrical ring area which forms the suction opening of the pump.
  • the impeller is provided with a cylindrical ring area which on the outside surrounds the cylindrical ring area of the cutting insert as a bearing.
  • the cutting insert is optimally held in the pump when the cutting insert protrudes from the opening of the impeller and is attached to the pump housing in a rotationally fixed manner with its protruding area.
  • the cutting insert has two to four, in particular three, curved cutting blades, each with a cutting edge, arranged inside the impeller.
  • the impeller can have one to three in particular have two counter cutting edges. It is also advantageous if the counter cutting edges of the impeller are formed by the inner end edges of the impeller blades.
  • the cutting effect and freedom from clogging are further improved by the fact that the blades of the impeller are curved towards the inside of the impeller in such a way that the generatrices of the inner surface of the impeller are formed by a large number of straight lines that are parallel to the axis of rotation of the impeller.
  • the inner cutting edge of each blade should be parallel to the impeller axis of rotation as the inner end of the blade.
  • the flow guidance of the wastewater or dirty water is improved in that the suction opening of the cutting insert widens conically towards the pump inlet.
  • impeller has partially cylindrical wall parts in the area of the blades, within which the cutting insert lies with partially cylindrical outer surfaces, the inner radius of the impeller wall part being equal to or only slightly larger than the outer radius the outer surface of the cutting blade.
  • the centrifugal pump has a pump housing 1, which is attached with its flange 2 to the flange of an electric motor, not shown, and a Forms the pump chamber in which an impeller 3 is mounted with its two blades 4.
  • the impeller has an impeller body with two partially cylindrical (or cylindrical sector-shaped) wall parts 5, each of which merges into a curved blade 4 which extends outwards and partially covers an opening 6 in the impeller through which the water flows from the inside of the impeller to the pump outlet 7 , how Figure 3 shows.
  • the partially cylindrical wall parts 5 and the blades 4 extending outward from the wall parts 5 are attached on the side facing the motor to a circular support disk 8 coaxial with the pump axis, on which a hub 9 protrudes on the outside, to which the motor shaft is attached.
  • the wall parts 5 merge into a cylindrical ring 10 that is coaxial to the pump axis, has the same inner diameter and inner radius as the wall parts 5 and surrounds a cutting insert 13 and thus the pump suction opening 11.
  • the cylindrical interior 12 of the ring 10 thus has the same diameter D as the inner spacing of the wall parts 5 from one another.
  • the stationary, non-rotating cutting insert 13 lies coaxially in the impeller 3 and has a cylindrical, partially perforated coaxial outer jacket 14 which forms a cylindrical annular region 15 at its end remote from the motor.
  • the ring area 15 lies with its cylindrical outer surface in the ring 10 of the impeller, the outer diameter of the ring area being only slightly smaller than the inner diameter D of the impeller ring 10, so that the impeller 3 with its ring 10 is rotatably supported on the ring area 15 of the cutting insert is.
  • the interior of the cylindrical ring area 15 forms the suction opening 11 of the pump.
  • a conical enlargement 17 at the front end of the ring area 15 facilitates the inflow and forms the fastening of the cutting insert 13 to the pump housing 1.
  • three curved, narrow finger-shaped cutting blades 18 are formed on the ring area 15, which extend from the ring area 15 in the direction of the motor and whose outer surfaces are located in the imaginary cylinder surface in which the outer surface of the ring area 15 is also located.
  • the ends of the cutting blades 18 are fixed to a disk or inner plate 19 which is coaxial to the pump axis and adjoins the inside of the support disk 8.
  • the inner plate 19 adjoining the inside of the support disk 8 forms a second bearing point for the cutting mechanism.
  • Each stationary cutting blade 18 of the cutting insert forms, on a curved edge facing the impeller blades 4, a cutting edge 21 which interacts with counter cutting edges 22 which are arranged at the inner ends of the blades 4.
  • the counter cutting edges 22 of the impeller move over the cutting edges 21 of the cutting blades, so that solid parts of the dirty water that have got between these cutting edges are sheared off and comminuted.
  • the outer surfaces of the ring area 15 and the cutting blades 18 lie in a cylinder jacket that is coaxial to the pump axis, the radius of which is equal to or minimally smaller than the radius of the cylindrical inner surfaces of the ring 10 and the wall parts 5 of the impeller 3, so that the impeller differs from the cylindrical Outer surface of the cutting insert 13 is guided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (10)

  1. Pompe centrifuge, en particulier un circulateur motorisé pour eaux chargées ou usées, avec un rotor (3), dont la face frontale orientée vers l'ouverture d'aspiration de la pompe forme une ouverture et la face frontale du rotor orientée dans la direction opposée à l'ouverture d'aspiration de la pompe est recouverte d'un disque porteur (8), sur lequel sont fixées, plus particulièrement formées, des pales incurvées (4), sachant que dans l'espace intérieur du rotor (3) s'avance un insert de coupe (13) coaxialement par rapport à l'axe du rotor présentant au moins un tranchant (21), lequel forme avec au moins un contre-tranchant (22) du rotor (3) un dispositif de coupe, caractérisée en ce que l'insert de coupe (13) rempli l'ouverture (10) du rotor (3) orientée dans la direction opposée au moteur avec une partie annulaire cylindrique (15) formant l'ouverture d'aspiration de la pompe, et le rotor (3) avec une partie annulaire cylindrique (10) externe entoure en tant que palier la partie annulaire cylindrique (15) de l'insert de coupe (13).
  2. Pompe centrifuge selon la revendication 1, caractérisée en ce que l'insert de coupe (13) sort de l'ouverture (10) du rotor (3) et est fixé de façon solidaire en rotation avec sa partie annulaire (15) sortante au carter de pompe (1).
  3. Pompe centrifuge selon la revendication 1 ou 2, caractérisée en ce que le disque porteur (8) forme un palier-pivot pour l'insert de coupe (13).
  4. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que l'insert de coupe (13) présente entre deux et quatre, plus particulièrement trois pales de coupe (18) incurvées et disposées à l'intérieur du rotor, avec chacun un tranchant (21).
  5. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que le rotor (3) présente de un à trois, plus particulièrement deux contre-tranchants (22).
  6. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que les contre-tranchants (22) du rotor (3) sont formés par les bords d'extrémité intérieures des pales du rotor (4).
  7. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que les pales (4) du rotor (3) sont incurvées de telle façon en direction de l'intérieur du rotor que les génératrices de la surface intérieure du rotor sont formées de plusieurs droites parallèles à l'axe de rotation du rotor (3).
  8. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que le contre-tranchant (22) de chaque pale (4) est, en tant qu'extrémité intérieure de la pale du rotor (4) parallèle à l'axe de rotation du rotor.
  9. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que l'ouverture d'aspiration (16) de l'insert de coupe (13) forme un cône croissant en direction de l'admission de la pompe.
  10. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que dans la zone des pales (4), le rotor (3) présente des parties de paroi (5) partiellement cylindriques à l'intérieur desquelles l'insert de coupe (13) repose sur des surfaces extérieures partiellement cylindriques (25), sachant que le rayon interne (D) de la partie de paroi du rotor (5) est égal ou légèrement supérieur au rayon externe des surfaces extérieures de la pale de coupe.
EP15713648.2A 2014-03-27 2015-03-25 Pompe centrifuge à dispositif de coupe Active EP3090185B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15713648T PL3090185T3 (pl) 2014-03-27 2015-03-25 Pompa wirowa z urządzeniem tnącym

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014004420.3A DE102014004420A1 (de) 2014-03-27 2014-03-27 Kreiselpumpe mit Schneidvorrichtung
PCT/EP2015/000634 WO2015144307A1 (fr) 2014-03-27 2015-03-25 Pompe centrifuge à dispositif de coupe

Publications (2)

Publication Number Publication Date
EP3090185A1 EP3090185A1 (fr) 2016-11-09
EP3090185B1 true EP3090185B1 (fr) 2021-02-24

Family

ID=52785033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15713648.2A Active EP3090185B1 (fr) 2014-03-27 2015-03-25 Pompe centrifuge à dispositif de coupe

Country Status (4)

Country Link
EP (1) EP3090185B1 (fr)
DE (1) DE102014004420A1 (fr)
PL (1) PL3090185T3 (fr)
WO (1) WO2015144307A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108071595B (zh) * 2017-12-12 2020-08-21 解树超 一种全介质通过型污水泵

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026933B (de) * 1955-05-13 1958-03-27 Maurice Gerardin Vorrichtung zum Zerkleinern von in einer Fluessigkeit befindlichen Feststoffen
US3096718A (en) * 1961-12-12 1963-07-09 Conard Kenner Trash cutter for a pump
CH411584A (de) * 1964-07-10 1966-04-15 Kolb Eugen Ag Zentrifugalpumpe zum Fördern von verunreinigten Flüssigkeiten
DE2634683A1 (de) 1976-08-02 1978-02-09 Hermann Dipl Ing Wank Querdurchstroemte hochdruck-schneiddickstoffpumpe
DE3017182A1 (de) * 1980-05-05 1981-11-12 Központi Bányászati Fejlesztési Intézet, Budapest Einrichtung zum transport von trueben und ihrer verfeinerung waehrend des transportes
FI824113A0 (fi) 1982-11-30 1982-11-30 Ahlstroem Oy Foerfarande och anordning foer fibrering av foerbehandlat avfallspapper
US4778336A (en) * 1987-07-09 1988-10-18 Weil Pump Company Cutter pump subassembly
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
US8109714B2 (en) * 2007-09-06 2012-02-07 Keener Robert M Sewage pump
DE102008057233A1 (de) 2008-11-10 2010-05-12 Orpu Pumpenfabrik Gmbh Vorrichtung zum Zerkleinern von in flüssigen Medien befindlichen Bestandteilen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PL3090185T3 (pl) 2021-07-12
WO2015144307A1 (fr) 2015-10-01
EP3090185A1 (fr) 2016-11-09
DE102014004420A1 (de) 2015-10-01

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