EP3080459B1 - Pompe à moteur à rotor humide - Google Patents

Pompe à moteur à rotor humide Download PDF

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Publication number
EP3080459B1
EP3080459B1 EP14784400.5A EP14784400A EP3080459B1 EP 3080459 B1 EP3080459 B1 EP 3080459B1 EP 14784400 A EP14784400 A EP 14784400A EP 3080459 B1 EP3080459 B1 EP 3080459B1
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EP
European Patent Office
Prior art keywords
separating
wet
flange
pump according
motor housing
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
EP14784400.5A
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German (de)
English (en)
Other versions
EP3080459A1 (fr
Inventor
Thomas Materne
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
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Wilo SE
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Publication of EP3080459A1 publication Critical patent/EP3080459A1/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

Definitions

  • the invention relates to a wet rotor motor pump with a stator surrounded by a motor housing and a rotor separated from the stator by a can, which runs in the rotor space formed by the can and is connected to the pump impeller via a shaft.
  • a wet-running pump with an all-plastic containment can is off EP1767787 known.
  • the object of the invention as defined in claim 1 is to improve a wet rotor motor pump of the type mentioned at the beginning in such a way that the advantages of the plastic material are used and its disadvantages are compensated when a containment can made of plastic is used.
  • a high level of tightness and strength with a simple construction should be achieved.
  • the containment shell made of plastic has an outwardly directed containment shell flange at its end facing the pump impeller.
  • the inward-facing motor housing flange can be used twice.
  • the inner end of the motor housing flange forms a radial contact surface for the outside of the containment can and the side surface of the motor housing flange facing the pump forms an axial contact surface for the containment can flange
  • the motor housing flange takes on essential functions of the containment can flange.
  • the motor housing with the molded flange on the hydraulic side takes on the strength tasks against the acting radial, axial and pressure forces.
  • the can flange essentially continues to act as a seal between the wet and dry areas.
  • the strength tasks are essentially fulfilled by the motor housing.
  • the flange on the containment shell can be made thinner, which simplifies production.
  • the flange on the motor housing with the concentric mounting of the can tube also improves the centering of the inner rotor. As a result, the containment shell is also much easier to manufacture.
  • the motor housing forms an inwardly directed motor housing flange at its end facing the pump impeller. Its inner end preferably forms an annular extension that rests directly or via an intermediate layer on the outside of the containment shell.
  • the inwardly directed flange of the motor housing in particular with its inner ring-shaped, socket-shaped or tubular enlargement resting on the outer side of the containment shell, assumes essential sealing, strength and damping functions.
  • the attachment of the containment can (cartridge) in the motor housing prevents axial movements in both axial directions. This increases the efficiency of the product (motor and hydraulics).
  • the hold of the can is improved if the can flange is held on the motor housing flange by a form-fitting connection, in particular by a latching connection, in order to be fixed in both axial directions.
  • the housing of the containment shell on the electronics side serves as a second centering of the containment shell. Both centering points on the motor housing are machined together with the stator seat in one setting.
  • the containment shell is statically centered safely via two radial mounts in front of and behind the stator and has a very good coaxial position to the stator.
  • the geometrical structure of the motor enables the implementation of a better tightness to the environment.
  • the heat dissipation from the rotor space by means of a heat exchanger and in combination with an internal circulation of the medium in the rotor space reduces the temperature in the rotor space.
  • the wet rotor motor pump On the hydraulic side, the wet rotor motor pump has a pump housing 1 which surrounds a pump chamber 2 in which a pump impeller 3 runs.
  • a motor housing 4 is coaxially attached to the pump housing and surrounds a stator 5 in which a containment can 6 (or can) lies, which forms a rotor space in which the motor rotor 7 runs.
  • the rotor 7 has a coaxial shaft 8 which is guided through two bearings 9, 10 arranged within the containment shell 6 and which carries the pump impeller 3 at one end.
  • annular motor housing flange 12 On the hydraulic side of the outer wall 11 of the motor housing 4, an inwardly directed annular motor housing flange 12 is formed, at the inner end of which an annular extension 12a is formed, the free end of which is directed towards the stator 5.
  • the annular widening 12a forms a coaxial central opening 13 which surrounds the containment shell 6 on the outside in such a way that the annular widening rests in a form-fitting manner on the cylindrical outer surface of the containment shell or can.
  • the free end of the annular extension 12a is directed towards the pump impeller 3 and not in another In the embodiment shown, the annular extension 12a projects beyond the motor housing flange 12 on both sides.
  • the containment shell 6 has the design according to Figure 1 On the hydraulic side, an outwardly directed, annular, thin-walled integrally formed flange 14, which rests closely on that outer surface of the motor housing flange 12 which faces the pump impeller 3.
  • the plastic containment shell 6 is centered coaxially via a radial fit in a recess in the motor housing wall 11.
  • the containment can thus has, in addition to the can, an integrally formed flange 14, which clings to the flange 12 of the motor housing on the hydraulic side.
  • the flange 14 of the containment shell 6, which fits closely to the flange 12, essentially only takes on the function of separating the media and can therefore be designed with very thin walls.
  • the necessary pressure forces are absorbed by the flange 12 of the motor housing 4.
  • the contact of the containment can flange on the motor housing flange prevents the containment can from moving in the direction of the electronics housing 15.
  • the pump shown differs from the previously described embodiment according to the invention in that the containment can 6 does not have an outwardly directed flange on the side facing the pump impeller 3 and ends within a sleeve-shaped inner end 12a of the motor housing flange 12.
  • the end of the containment shell forms a positive, liquid-tight connection with the end of the motor housing flange and thus with the annular extension 12a.
  • At least one damping element is preferably arranged between the motor housing flange 12 and the containment can 6, in particular the containment can flange 14.
  • the can 6 On the inner side of the motor housing wall 11, between the motor housing flange 12 and the stator 5, the can 6 is axially fixed in order to prevent the movements of the rotor assembly with the can in the direction To prevent pump housing 1.
  • the rear attachment of the can 6 on the motor housing 4 can, for. B. by means of a bayonet, locking rings, etc. take place.
  • this function is implemented via a fastening ring or centering ring 19 made of plastic, which prevents the displacement of the containment can by means of snap hooks that engage in recesses on the containment can and an axial stop on the motor housing flange.
  • the containment shell On the electronics side, the containment shell is positioned in the position by means of a centering flange 19 and vibrations are reduced or damped.
  • This centering element can also function as a seal between the motor and the electronics module.
  • the centering ring is molded onto the electronics housing.
  • the radial bearing on the hydraulic side is positively and / or non-positively connected to the containment can by means of a bearing bracket 16.
  • a heat-conducting element 21 is located between the impeller and radial bearing, which also minimizes the space on the side of the impeller in order to increase the hydraulic efficiency, but which basically serves as a heat exchanger between the rotor space and the hydraulic space. Furthermore, this element can have the seat for a dynamic seal which closes the gap to the rotor shaft 8. A secondary seal on the rear side of the impeller keeps coarse particles away from the dynamic seal.
  • the shaft is designed with a blind hole 26 and closed on the hydraulic side.
  • Cross bores 27 between radial bearing 9 and dynamic seal 25 enable internal circulation of the medium in the rotor space.
  • reinforcing rings can optionally be mounted on the containment shell 6 in front of and behind the stator 5.
  • a ring stiffening the containment can can be mounted on the containment can 6 from the electronics side.
  • the radial bearing 9 on the hydraulic side, a bearing bracket 16 is used to connect positively and / or non-positively to the containment can.
  • a flat washer is molded onto the bearing bracket.
  • this element 21 contains the seat for a dynamic seal 25, which closes the gap to the rotor shaft 8. Particles are kept away from the dynamic seal by means of a secondary seal on the rear side of the impeller.

Landscapes

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

Claims (13)

  1. Motopompe à rotor noyé comprenant un stator (5) entouré par un carter de moteur (4) et un rotor (7) séparé du stator par un pot d'entrefer (6) en matière plastique, s'étendant dans un espace de rotor formée par le pot d'entrefer et relié à une rotor de pompe (3) par un arbre (8), caractérisée en ce que le pot d'entrefer (6) présente à son extrémité tournée vers le rotor de pompe (3) une bride de pot d'entrefer (14) formée dirigée vers l'extérieur, que le carter du moteur (4) forme, à son extrémité tournée vers le rotor de pompe (3), une bride de carter de moteur (12) dirigée vers l'intérieur, sachant que la bride de pot d'entrefer repose, du côté hydraulique, sur la surface extérieure de la bride du carter de moteur (12) dirigée vers l'intérieur orientée vers le rotor de pompe (3).
  2. Motopompe à rotor noyé selon la revendication 1, caractérisée en ce que l'extrémité intérieure de la bride du carter de moteur (12) forme un prolongement annulaire (12a) reposant directement ou au travers d'une couche intermédiaire sur le pot d'entrefer (6).
  3. Motopompe à rotor noyé selon la revendication 2, caractérisée en ce que l'extrémité libre du prolongement annulaire (12a) dirigée vers le stator (5).
  4. Motopompe à rotor noyé selon l'une des revendications précédentes, caractérisée en ce que la bride de pot d'entrefer (14) est maintenue sur la bride du carter de moteur (12) par une connexion avec ajustement de forme, en particulier par une connexion à encliquetage (20).
  5. Motopompe à rotor noyé selon l'une des revendications précédentes, caractérisée en ce qu'au moins un élément d'amortissement est disposé entre la bride du carter de moteur (12) et le pot d'entrefer (6), plus particulièrement, la bride de pot d'entrefer (14).
  6. Motopompe à rotor noyé selon la revendication 5, caractérisée en ce que l'élément d'amortissement est placé de manière annulaire, en particulier sous forme de disque annulaire, entre la bride du carter de moteur (12) et le pot d'entrefer (6), plus particulièrement la bride de pot d'entrefer (14).
  7. Motopompe à rotor noyé selon l'une des revendications précédentes, caractérisée en ce que le pot d'entrefer (6) présente des anneaux de renforcement sur sa surface extérieure cylindrique.
  8. Motopompe à rotor noyé selon l'une des revendications précédentes, caractérisée en ce qu'un support de palier (16) inséré dans l'ouverture du pot d'entrefer (6) dirigée côté hydraulique, entoure un palier radial (9) qui y est disposé.
  9. Motopompe à rotor noyé selon l'une des revendications précédentes, caractérisée en ce que le carter du moteur (4), en particulier la paroi du carter du moteur (11), forme une ouverture circulaire (17) sur le côté opposé au rotor de pompe (3), dont le diamètre est égal ou supérieur au diamètre externe du stator du moteur (5).
  10. Motopompe à rotor noyé selon la revendication 9, caractérisée en ce qu'un couvercle de fermeture (18) est inséré dans l'ouverture (17), sur le côté intérieur duquel une bague de centrage (19) fait saillie de manière coaxiale et entoure l'extrémité, en particulier le fond du pot d'entrefer (6).
  11. Motopompe à rotor noyé selon la revendication 10, caractérisée en ce qu'un boîtier électronique (15) est fixé sur le couvercle de fermeture (18).
  12. Motopompe à rotor noyé selon la revendication 11, caractérisée en ce que le couvercle de fermeture (18) fait partie du boîtier électronique.
  13. Motopompe à rotor noyé selon l'une des revendications précédentes, caractérisée en ce que le pot d'entrefer (6) est centré par deux logements radiaux disposés en amont et en aval du stator.
EP14784400.5A 2013-12-10 2014-09-20 Pompe à moteur à rotor humide Active EP3080459B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013020387.2A DE102013020387A1 (de) 2013-12-10 2013-12-10 Nassläufermotorpumpe
PCT/EP2014/002556 WO2015086099A1 (fr) 2013-12-10 2014-09-20 Pompe à moteur à rotor humide

Publications (2)

Publication Number Publication Date
EP3080459A1 EP3080459A1 (fr) 2016-10-19
EP3080459B1 true EP3080459B1 (fr) 2021-03-31

Family

ID=51730484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14784400.5A Active EP3080459B1 (fr) 2013-12-10 2014-09-20 Pompe à moteur à rotor humide

Country Status (4)

Country Link
EP (1) EP3080459B1 (fr)
CN (1) CN105849414A (fr)
DE (1) DE102013020387A1 (fr)
WO (1) WO2015086099A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014008971A1 (de) 2014-06-23 2015-12-24 Wilo Se Nassläufermotorpumpe
CN114567112B (zh) * 2020-01-20 2024-09-20 锐宸企业有限公司 耐压马达
WO2024137309A1 (fr) * 2022-12-22 2024-06-27 Schlumberger Technology Corporation Système de pompage submersible à moteur hermétiquement scellé

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1098820B (de) * 1959-09-04 1961-02-02 Lederle Pumpen & Maschf Durch einen Spaltrohrmotor angetriebene mehrstufige Kreiselpumpe
FR1307616A (fr) * 1961-12-06 1962-10-26 Sigmund Pumps Ltd Perfectionnements aux pompes entraînées électriquement
DE1802561A1 (de) * 1968-10-11 1970-05-27 Licentia Gmbh Heisswasser-Umwaelzpumpe
DE1811430A1 (de) * 1968-11-25 1970-06-11 Gummi Jaeger Kg Gmbh & Cie Hydraulische Stroemungsmaschine
DE9100515U1 (de) * 1991-01-17 1991-04-04 Friatec-Rheinhütte GmbH & Co, 65203 Wiesbaden Magnetgekuppelte Kreiselpumpe
DE4342649C1 (de) * 1993-12-14 1995-02-16 Munsch Kunststoff Schweistechn Magnetkreiselpumpe für aggressive Medien
DE19545561A1 (de) * 1995-12-07 1997-06-12 Pierburg Ag Pumpe-Motoreinheit
DE19824345A1 (de) * 1998-06-02 1999-12-09 Wilo Gmbh Spaltrohrpumpe mit Wicklungsträger
DE19943862A1 (de) * 1999-09-13 2001-03-15 Wilo Gmbh Naßläuferpumpe mit Montageplatte
DE10025190A1 (de) * 2000-05-20 2001-12-06 Wilo Gmbh Spaltrohrmotor mit Folienspaltrohr
JP2002213385A (ja) * 2001-01-19 2002-07-31 Ebara Corp キャンドモータ及びキャンドモータポンプ
DE10246349A1 (de) * 2002-10-04 2004-04-29 Siemens Ag Kühlvorrichtung für ein Kraftfahrzeug mit einem Kühlkanal für ein Kühlmedium
JP3877211B2 (ja) * 2003-03-20 2007-02-07 株式会社イワキ マグネットポンプにおけるリアケーシングの製造方法
EP1767787B2 (fr) * 2005-09-24 2016-10-26 Grundfos Management A/S Unité de pompe submersible
DE102005057661A1 (de) * 2005-12-01 2007-06-06 Wilo Ag Kreiselpumpe mit Spalttopf
DE102006049292A1 (de) * 2006-10-19 2008-04-30 Wilo Ag Spaltrohrmotor
DE102007049641A1 (de) * 2007-10-17 2009-04-23 Daimler Ag Pumpe und Brennstoffzellensystem mit einer derartigen Pumpe
JP5371939B2 (ja) * 2010-12-07 2013-12-18 株式会社市丸技研 流体送り装置及びタイヤ加硫装置
JP5912738B2 (ja) * 2012-03-27 2016-04-27 日本電産サンキョー株式会社 ポンプ装置
TWI594551B (zh) * 2012-03-29 2017-08-01 荏原製作所股份有限公司 密封電動機、真空泵

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
EP3080459A1 (fr) 2016-10-19
DE102013020387A1 (de) 2015-06-11
CN105849414A (zh) 2016-08-10
WO2015086099A1 (fr) 2015-06-18

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