EP2735744A2 - Roue mobile d'une pompe centrifuge à aimants - Google Patents

Roue mobile d'une pompe centrifuge à aimants Download PDF

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Publication number
EP2735744A2
EP2735744A2 EP13005445.5A EP13005445A EP2735744A2 EP 2735744 A2 EP2735744 A2 EP 2735744A2 EP 13005445 A EP13005445 A EP 13005445A EP 2735744 A2 EP2735744 A2 EP 2735744A2
Authority
EP
European Patent Office
Prior art keywords
impeller
magnets
impeller according
disc
plastic
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
EP13005445.5A
Other languages
German (de)
English (en)
Other versions
EP2735744B1 (fr
EP2735744A3 (fr
Inventor
Günter Strelow
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 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 Wilo AG filed Critical Wilo AG
Publication of EP2735744A2 publication Critical patent/EP2735744A2/fr
Publication of EP2735744A3 publication Critical patent/EP2735744A3/fr
Application granted granted Critical
Publication of EP2735744B1 publication Critical patent/EP2735744B1/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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0613—Special connection between the rotor compartments
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • 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
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to an impeller of a centrifugal pump with a rear support disc, on which the impeller blades are arranged, wherein on the back of the support plate permanent magnets are fixed, for trapping of particles contained in the pumped liquid.
  • the object of the invention is to improve an impeller of the type mentioned above such that on the one hand it is reliably prevented that magnetisable particles enter the bearings and into the motor rotor space and, on the other hand, an adhesion of the particles to the impeller is prevented.
  • the support disc is made of plastic, that the magnets are disposed within the plastic of the support disc and that the magnet side, which faces the flow located on the back of the support disc, is covered by a layer of material.
  • the material layer covering the magnets ensures that the magnetisable particles do not adhere to the magnet of the impeller but are conveyed into the pump chamber by the centrifugal forces acting on the rear side of the impeller and thus conveyed to the pump outlet.
  • the magnets thus have a diverting effect for the magnetizable particles, wherein it is ensured that they do not adhere to the magnet and thus do not worsen the efficiency of the impeller.
  • the required magnetic strength depends on the gap between the impeller and the housing wall and the distribution on the impeller.
  • the design should be designed so that a small magnetic force is sufficient to remove the particles safely into the pump room.
  • the magnets are encapsulated by the plastic of the impeller wheel.
  • the impeller is preferably an injection molded part made of plastic.
  • the magnets on the impeller are covered by a disc or a cap.
  • the cover consists of a material on which the particles can easily slide off.
  • the cover can also be formed by the injection molded part of the impeller.
  • the surface of the cover or of the material is provided with a non-stick coating.
  • the covering layer is a DLC coating.
  • Optimum results are achieved when the thickness of the cover or covering material is 0.4 to 2 mm. It is also advantageous if the distance of the impeller back to the pump wall is preferably 2 to 10 mm.
  • the magnetic flux density of the magnets is preferably 0.02 to 0.2 Tesla.
  • the magnet or magnets can be designed as a ring or segment. It is also proposed that the magnets are arranged close to the impeller outer diameter, uniformly distributed over the circumference of the impeller.
  • the impeller is driven by an electric motor whose rotor is surrounded by a canned or split pot and flows around the medium to be conveyed.
  • a motor centrifugal pump has a pump housing 1, in whose pump chamber the impeller 2 is mounted, which is fixed on the end of the shaft 3 of the wet rotor electric motor.
  • the shaft 3 is surrounded by its motor rotor 4 by a split tube or a split pot 5 and flows around the pumped medium for engine cooling.
  • a pump wall 6 separates the pump chamber from the engine room.
  • the impeller 2 of the pump has a rear circular support disk 7 made of plastic, on the front side of the impeller blades 8 are integrally formed in order to promote the conveying liquid from the suction channel 9 into the impeller center in the pressure channel 10.
  • the magnets can be designed differently, for. B. as a ring, individual magnets or segments.
  • the magnets 12 are encapsulated by the plastic of the support disk 7, so that the impeller is an injection-molded part whose plastic covers the magnets 12 by 0.4 to 2 mm.
  • the execution is after Fig. 2 the cover of the magnets 12 formed by a 0.4 to 2 mm thick rear wall 13 which is fixed to the back of the impeller 2 and preferably made of plastic.
  • the cover or the cover may consist of a material on which the particles easily slide off.
  • the outer surface of the magnet cover, in particular of the additional rear wall 13 is provided with a non-stick coating, in particular with a DLC coating (amorphous carbon layer).
  • the distance of the impeller back to the pump wall 6 is preferably 2 to 10 mm. Further, the magnetic flux density of the magnets 12 is preferably 0.02 to 0.2 Tesla.
  • the magnets are mounted in or on the disc 13 or cap, which is attached to the back of the impeller.
  • the outside of the magnets is covered by a particular non-magnetic material. Otherwise, the same o.g. technical characteristics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP13005445.5A 2012-11-23 2013-11-20 Roue mobile d'une pompe centrifuge à aimants Active EP2735744B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012022851.1A DE102012022851A1 (de) 2012-11-23 2012-11-23 Laufrad einer Kreiselpumpe mit Magneten

Publications (3)

Publication Number Publication Date
EP2735744A2 true EP2735744A2 (fr) 2014-05-28
EP2735744A3 EP2735744A3 (fr) 2017-08-16
EP2735744B1 EP2735744B1 (fr) 2020-10-28

Family

ID=49709423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13005445.5A Active EP2735744B1 (fr) 2012-11-23 2013-11-20 Roue mobile d'une pompe centrifuge à aimants

Country Status (2)

Country Link
EP (1) EP2735744B1 (fr)
DE (1) DE102012022851A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4056851A1 (fr) * 2021-03-09 2022-09-14 Metso Outotec Sweden AB Élément d'usure pour une pompe à boue

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020003854A1 (de) 2020-06-26 2021-12-30 KSB SE & Co. KGaA Kreiselpumpe zur Förderung feststoffhaltiger Medien

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1490440A (fr) 1966-08-29 1967-07-28 Glutz Blotzheim Nachfolger A G Pompe de circulation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10009376A1 (de) * 2000-02-29 2001-08-30 Wilo Gmbh Saugseitiger Rotor
FR2809777B1 (fr) * 2000-05-30 2002-12-06 Jeumont Ind Dispositif motorise de mise en circulation d'un fluide a l'interieur d'une enceinte et utilisation
DE10216402A1 (de) * 2002-04-12 2003-10-23 Wilo Gmbh Kreiselpumpe mit integriertem Magnetfilter
US6881033B2 (en) * 2002-09-30 2005-04-19 Fisher & Paykel Healthcare Limited Impeller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1490440A (fr) 1966-08-29 1967-07-28 Glutz Blotzheim Nachfolger A G Pompe de circulation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4056851A1 (fr) * 2021-03-09 2022-09-14 Metso Outotec Sweden AB Élément d'usure pour une pompe à boue
WO2022189395A1 (fr) * 2021-03-09 2022-09-15 Metso Outotec Sweden Ab Élément d'usure pour pompe à boues

Also Published As

Publication number Publication date
EP2735744B1 (fr) 2020-10-28
DE102012022851A1 (de) 2014-05-28
EP2735744A3 (fr) 2017-08-16

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