EP2786020B1 - Motopompe à rotor noyé - Google Patents

Motopompe à rotor noyé Download PDF

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Publication number
EP2786020B1
EP2786020B1 EP12818776.2A EP12818776A EP2786020B1 EP 2786020 B1 EP2786020 B1 EP 2786020B1 EP 12818776 A EP12818776 A EP 12818776A EP 2786020 B1 EP2786020 B1 EP 2786020B1
Authority
EP
European Patent Office
Prior art keywords
impeller
motor
split tube
annular
pump
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
EP12818776.2A
Other languages
German (de)
English (en)
Other versions
EP2786020A2 (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 SE
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Publication date
Application filed by Wilo SE filed Critical Wilo SE
Publication of EP2786020A2 publication Critical patent/EP2786020A2/fr
Application granted granted Critical
Publication of EP2786020B1 publication Critical patent/EP2786020B1/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
    • 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
    • F04D13/062—Canned motor pumps pressure compensation between motor- and pump- compartment
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the invention relates to a wet-rotor motor pump with a can that separates the motor stator from the rotor mounted in the can on a motor shaft, the can forming a can flange on the end facing the impeller which, as a partition wall, separates the pump chamber from the motor stator, the motor shaft protrudes into the pump chamber and carries the pump impeller there, and on the back of the impeller there is a coaxial annular space open to the pump chamber, from which the pumped liquid flows through at least one flow passage located in the partition wall in order to flow through the rotor space into the pump chamber flow back, and wherein the impeller rear wall has a throttled flow opening in the area of the annular space, which connects the annular space with the impeller interior, in particular with the pump suction side.
  • Such a wet-running motor pump is from the DE 39 31 665 C1 known.
  • the rotor of the electric motor is washed around by the medium.
  • the stator is separated from the medium by a can / can.
  • the rotor bearings are lubricated by the medium.
  • Such constructions are maintenance-free and have a very long service life as long as the medium is relatively clean. In many areas of application, however, the media are contaminated with particles and chemical agents (inhibitors). This makes it necessary to prevent abrasive particles from entering the rotor space.
  • the object of the invention is to allow as few particles as possible to get into the rotor space.
  • a coaxial ring element protrudes from the rear of the impeller, which surrounds the motor shaft and delimits the annular space from the motor shaft in such a way that an inner annular space is formed around the motor shaft.
  • the rear side of the impeller carry conveying elements, in particular in the form of blades, which circulate the liquid in the annular space.
  • the ring element of the impeller with its free, ring-shaped end face adjoins the can, in particular the can flange, in such a way that there is an annular gap between the end face and the can, in particular the can flange, through which the conveying fluid enters the rotor space surrounding the can .
  • the wall of the coaxial ring element is bent outward in the shape of a quarter circle in cross section, so that the ring element has a larger diameter on its ring-shaped free end face than in the remaining area.
  • the motor shaft is a hollow shaft i, through which liquid located in the rotor space flows into the pump chamber.
  • the motor hollow shaft is at least one radial opening, bore or groove at the level of the ring element, through which the liquid from the ring element surrounding inner annular space flows into the shaft cavity, so that particles are also removed to the suction side.
  • the impeller has a rear support disc on which the impeller blades are arranged, permanent magnets being attached to the rear of the support disc to capture particles contained in the delivery fluid, the support disc being made of plastic, so that the magnets are inside the plastic the support disk are arranged and that the magnet side, which faces the conveying flow located on the support disk rear side, is covered by a material layer.
  • the material layer covering the magnets ensures that the magnetizable particles do not adhere to the magnets of the impeller, but are instead conveyed into the pump chamber by the centrifugal forces acting on the back of the impeller and thus conveyed to the pump outlet.
  • the magnets thus have a redirecting effect for the magnetizable particles, whereby it is ensured that they do not stick to the magnets and thus do not impair the efficiency of the impeller.
  • the wet-running motor pump has an impeller 1 as a centrifugal pump, which is driven by a coaxial shaft, in particular a hollow shaft 2, which carries a rotor core 3 that rotates within the stator 4 of the electric motor.
  • the rotor package 3 is separated from the stator by a can 5 through which the conveyed medium flows, so that the bearings in the can 5 are lubricated and cooled.
  • the can is closed at the back, so that it can also be referred to as a "can".
  • the can 5 forms a can flange 8 on the end facing the impeller 1 in order to separate the pump chamber 10 from the motor stator 4.
  • An annular element 11 is formed coaxially on the rear side of the pump impeller 1, so that an annular space 12 is formed between the rear side of the impeller and the can flange 8 exists, which is separated from the rest of the pump chamber 10 except for a gap 13.
  • An annular restricted flow opening 17 is formed between the front end of the annular projection 11 and the can 5 and / or between the annular projection 11 and a sealing coaxial sealing ring, not shown, in particular a floating ring, which surrounds the hollow shaft 2.
  • the medium flowing from the annular space 12 through the annular opening 17 between the annular element 11 and the can 5 into the can interior flows first past the inner wall of the can 5 to the end of the can, in order to get there through openings into the longitudinal cavity 18 of the hollow shaft 2 and to the suction side of the pump flow back.
  • the ring element 11 essentially has the shape of a cylinder liner which is molded onto the rear of the impeller.
  • the wall of the coaxial ring element is bent outwardly in the shape of a quarter circle in cross section, so that the ring element 11 has a larger diameter on its ring-shaped free end face than in the remaining area.
  • the outer end face 14 of the ring element with the can 5 or the can flange 8 forms the flow opening 17 through which a small part of the conveying medium flows from the annular space 12 into the rotor space surrounding the can.
  • Conveying elements in the form of blades 6, which circulate the liquid in the annular space 12, are molded onto the rear of the impeller.
  • the liquid within the annular space 12 is throttled in that at least one throttled opening 15 is arranged in the rear wall of the impeller 1, through which the liquid located in the annular space 12 with particles collected there flows to the suction side of the pump.
  • the magnetic force acting on the particles has the effect that the particles striving towards the center (shaft) due to the impeller side space flow are deflected by these magnets on the rear of the impeller to the rear wall of the impeller and are pushed back into the pump chamber by the centrifugal force acting here without the motor rotor space within the To reach containment shell or can and without getting into the camp.
  • the magnets can be designed differently, e.g. as a ring, individual magnets or segments.

Landscapes

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

Claims (5)

  1. Circulateur motorisé à rotor noyé avec une gaine (5) séparant le stator du moteur (4) du rotor placé dans la gaine sur un arbre du moteur (2), sachant que la gaine forme, sur son extrémité orientée vers le rotor (1) une bride de gaine (8) séparant en tant que paroi séparatrice la chambre de pompe (10) du stator du moteur (4), sachant que l'arbre du moteur rentre dans la chambre du moteur (10) où il supporte le rotor de la pompe (1), que la face arrière du rotor présente un espace annulaire (12) coaxial ouvert vers la chambre de la pompe (10) à partir duquel le liquide transporté s'écoule, au travers d'au moins une ouverture d'écoulement (17) percée dans la paroi séparatrice, dans l'espace du rotor pour, après avoir traversé l'espace du rotor, revenir dans la chambre de la pompe (10), que la face arrière du rotor, au niveau de l'espace annulaire (12), présente une ouverture d'écoulement étranglée (15) reliant l'espace annulaire (12) à l'intérieur du rotor, en particulier au côté aspirant de la pompe, et sur la face arrière du rotor un élément annulaire (11) coaxial se projette, entoure l'arbre du moteur (2) et limite l'espace annulaire (12) en direction de l'arbre du moteur de telle façon qu'un espace annulaire (20) est formé autour de l'arbre du moteur (2), caractérisé en ce que l'arbre du moteur (2) est un arbre creux au travers duquel le liquide se trouvant dans l'espace du rotor s'écoule dans la chambre de la pompe et que l l'arbre creux du moteur (2) à la hauteur de l'élément annulaire (11) présente au moins une ouverture radiale (19), un trou ou une rainure laissant le liquide de l'espace annulaire (20) entouré de l'élément annulaire (11) s'écouler dans l'espace creux de l'arbre (18).
  2. Circulateur motorisé selon la revendication 1, caractérisé en ce que la face arrière du rotor supporte des éléments de transport (6) en particulier en forme de pelles faisant circuler le liquide dans l'espace annulaire (12).
  3. Circulateur motorisé selon la revendication 1 ou 2, caractérisé en ce que l'élément annulaire (11) du rotor (1) jouxtant de son côté avant (14) libre en forme d'anneau la gaine (5), plus particulièrement la bride de la gaine (8) de telle façon qu'entre son côté avant (14) et la gaine (5), plus particulièrement la bride de la gaine (8), se forme une fente annulaire au travers de laquelle le liquide transporté arrive dans l'espace du rotor entouré par la gaine (5).
  4. Motopompe selon l'une des revendications précédentes, caractérisée en ce que la section transversale de la paroi de l'élément annulaire coaxial (11) est courbée en forme de quart de cercle vers l'extérieur, de telle façon que l'élément annulaire (11) de son côté avant en forme d'anneau jouxtant la gaine (5) présente un diamètre plus grand que dans le reste de l'espace.
  5. Circulateur motorisé selon l'une des revendications précédentes, caractérisé en ce que le rotor (1) présente un disque porteur côté arrière, sur lequel sont disposées les lames du rotor, sachant que sur la face arrière du disque porteur sont fixés des aimants permanents destinés à capter les particules contenues dans le liquide transporté, sachant que le disque porteur est en plastique, que les aimants sont inclus dans le plastique du disque porteur et que le côté aimant, orienté du côté du liquide transporté s'écoulant du côté arrière du disque, est recouvert d'une couche de matériau.
EP12818776.2A 2011-11-29 2012-11-23 Motopompe à rotor noyé Active EP2786020B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011119625A DE102011119625A1 (de) 2011-11-29 2011-11-29 Nassläufer-Motorpumpe
PCT/EP2012/004851 WO2013079178A2 (fr) 2011-11-29 2012-11-23 Motopompe de compteur hydraulique

Publications (2)

Publication Number Publication Date
EP2786020A2 EP2786020A2 (fr) 2014-10-08
EP2786020B1 true EP2786020B1 (fr) 2020-09-23

Family

ID=47603520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12818776.2A Active EP2786020B1 (fr) 2011-11-29 2012-11-23 Motopompe à rotor noyé

Country Status (3)

Country Link
EP (1) EP2786020B1 (fr)
DE (1) DE102011119625A1 (fr)
WO (1) WO2013079178A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3017907B1 (fr) * 2014-02-26 2019-01-25 Wilo Salmson France Pompe de circulation de fluide comportant deux sous-ensembles dont l'un est amovible par rapport a l'autre
EP3032712B1 (fr) 2014-12-12 2018-02-07 Goodrich Control Systems Moteur pour actionneur électro-hydraulique
KR102367740B1 (ko) * 2015-11-18 2022-02-28 한온시스템 주식회사 차량용 공기 압축기
DE102017214997A1 (de) * 2017-08-28 2019-02-28 Mahle International Gmbh Elektrische Fluidpumpe
US11293444B2 (en) * 2018-06-14 2022-04-05 Regal Beloit America, Inc. Pump assembly having an axial flux electric motor
CN116753194B (zh) * 2023-07-14 2025-12-02 东莞百斯特流体科技有限公司 一种泵的内置循环散热结构及该种泵

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
GB1496035A (en) * 1974-07-18 1977-12-21 Iwaki Co Ltd Magnetically driven centrifugal pump
JPS51111902A (en) * 1975-03-26 1976-10-02 Iwaki:Kk Magnet pump
DE3645260C2 (de) * 1986-11-20 1995-01-19 Hermetic Pumpen Gmbh Pumpe mit einem Spaltrohrmagnetkupplungsantrieb
DE3931665C1 (en) * 1989-09-22 1991-02-21 Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund, De Split-ring electric motor for pump - has feeder coupled to pump chamber at point exhibiting high pressure
US5248245A (en) * 1992-11-02 1993-09-28 Ingersoll-Dresser Pump Company Magnetically coupled centrifugal pump with improved casting and lubrication
GB2290113B (en) * 1994-05-31 1998-07-15 Ingersoll Dresser Pump Co Centrifugal pump
DE29610799U1 (de) * 1996-06-20 1997-02-27 Klaus Union Armaturen Hydrodynamisches Gleitlager für einen Läufer einer Pumpe
US6012909A (en) * 1997-09-24 2000-01-11 Ingersoll-Dresser Pump Co. Centrifugal pump with an axial-field integral motor cooled by working fluid
DE10240800B4 (de) * 2002-08-30 2005-03-24 Munsch Chemie-Pumpen Gmbh Pumpe für chemisch aggressive Fördermedien
DE10322464B4 (de) 2003-05-16 2012-05-03 Ksb Ag Spaltrohrmotorpumpe
DE102004019721A1 (de) * 2004-03-18 2005-10-06 Medos Medizintechnik Ag Pumpe

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
WO2013079178A4 (fr) 2013-11-21
WO2013079178A3 (fr) 2013-10-03
DE102011119625A1 (de) 2013-05-29
WO2013079178A2 (fr) 2013-06-06
EP2786020A2 (fr) 2014-10-08

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