EP2870362A1 - Chemise d'entrefer à double paroi d'un entraînement magnétique, en particulier d'une pompe à entraînement magnétique - Google Patents

Chemise d'entrefer à double paroi d'un entraînement magnétique, en particulier d'une pompe à entraînement magnétique

Info

Publication number
EP2870362A1
EP2870362A1 EP13753527.4A EP13753527A EP2870362A1 EP 2870362 A1 EP2870362 A1 EP 2870362A1 EP 13753527 A EP13753527 A EP 13753527A EP 2870362 A1 EP2870362 A1 EP 2870362A1
Authority
EP
European Patent Office
Prior art keywords
solid material
magnetic coupling
pot
gap
coupling according
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Withdrawn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
EP13753527.4A
Other languages
German (de)
English (en)
Inventor
Günther Schneider
Michael Westib
Christian JUSSEN
Katja WISCHMANN
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.)
Ruhrpumpen GmbH
Original Assignee
Ruhrpumpen GmbH
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 Ruhrpumpen GmbH filed Critical Ruhrpumpen GmbH
Publication of EP2870362A1 publication Critical patent/EP2870362A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/025—Details of the can separating the pump and drive area
    • 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
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • 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
    • F04D13/0626—Details of the can
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0231—Magnetic circuits with PM for power or force generation
    • H01F7/0242—Magnetic drives, magnetic coupling devices

Definitions

  • the invention relates to a magnetic coupling, in particular a magnetic coupling pump having an inner rotor and an outer rotor, each carrying magnets between which a double-walled containment shell is arranged, which has an outer pot and an inner pot, each having a flange, a central portion and a bottom portion, wherein between the central portion and the bottom portion, a gap is arranged, and wherein the inner pot is connected via its flange with the flange of the outer pot.
  • Magnetic clutch pumps are well known, and described for example in DE 10 2009 022 916 A1.
  • the pump power is transmitted from a drive shaft via a magnet-bearing rotor (outer rotor) without contact and essentially without slippage to the pump-side magnet carrier (inner rotor).
  • the inner rotor drives the pump shaft, which is mounted in a slide bearing lubricated by the fluid, so in a hydrodynamic sliding bearing.
  • Between the outer rotor and the inner rotor, so between the outer and the inner magnet is the containment shell with its cylindrical wall.
  • the containment shell is connected at its flange to a pump component, for example a housing cover, and has a closed bottom opposite thereto.
  • a magnetic coupling pump is therefore the combination of a conventional pump hydraulics with a magnetic drive system. This system uses the attraction and repulsion forces between magnets in both coupling halves for non-contact and slipless torque transmission. Between the two rotors equipped with magnets is the containment shell, which separates the product space and the environment from each other. Especially when dealing with very valuable or very dangerous substances, the magnetic coupling pump therefore has great advantages.
  • Canned pots may be made of different materials such as e.g. consist of metals of various alloy compositions, plastic or ceramic.
  • Metal containment shells disadvantageously cause eddy current losses, with plastic gap pots having limited temperature and / or pressure resistance.
  • Centrifugal pumps with magnetic coupling or magnetic coupling pumps according to DIN EN ISO 2858 and DIN EN ISO 15783 and API 685 are thus equipped in the standard known manner with single-walled slotted pots.
  • the containment shell separates the product space from the atmosphere without leakage and forms the static seal between the inner and outer magnet rotor.
  • the containment shell has a wall thickness of 1-2 mm in the cylindrical part, ie in its middle section. Damage to the containment shell as a result of rolling bearing damage to the outer magnet rotor or sliding bearing damage in the region of the inner magnet rotor can lead to the discharge of delivery fluid into the atmosphere space of the intermediate lantern.
  • double-walled containment shells are used.
  • Double-walled containment pans are e.g. from EP 0 286 822 B1 but also from EP 0268 015.
  • EP 1 777 414 A1 a double-walled containment shell is known whose inner pot and outer pot contact each other at least in the area of the cylindrical jacket surface, wherein in this contact zone a network of paths is formed, in which a liquid medium, ie a medium of sufficient viscosity, such as e.g. Liquids or pasty masses, for example, a thermally conductive oil is arranged.
  • the special seal still contains additional risk potential, since the sealing measure can fail, so that a standstill must be feared, although the inner pot and the outer pot are actually still intact.
  • the double-walled containment shell may also be dismantled for Kotroll conjugen, a considerable effort must be made that the liquid present does not enter the environment.
  • the invention has for its object to provide a magnetic coupling, in particular a magnetic coupling pump of the type mentioned above available, in which simple means an improved containment shell in doppelwandiger design avoids at least the above-mentioned disadvantages.
  • the object is achieved by a magnetic coupling, in particular with a magnetic coupling pump with the features of claim 1.
  • a magnetic coupling in particular a magnetic coupling pump is proposed, which has an inner rotor and an outer rotor, each carrying magnets between which a double-walled containment shell is arranged, which has an outer pot and an inner pot, each having a flange, a Central portion and a bottom portion, wherein between the central portion and the bottom portion, a gap is arranged, and wherein the inner pot is connected via its flange with the flange of the outer pot. It is advantageously provided that the gap is at least partially filled with a solid material.
  • the gap is at least partially filled with a solid material, there is no longer the risk that this mixes in a defective either the inner pot with the Fördemedium in a harmful manner, or passes in an outer pot defect to the atmosphere.
  • the solid material remains in its position and does not dissolve. It is also beneficial that can be dispensed with each other to Abdichtrich on the flange of the two pots, since the solid material property due to not tending to leave its position, for example, to flow out or exit, as is possible with liquids or pastes.
  • the viscosity is very high (ie difficult to determine), which means for the purposes of the invention that the solid material is by no means free-flowing when the solid material is arranged in the gap.
  • the solid material is a thermally conductive material. It is favorable if the solid material is a thermally conductive plastic. Appropriately, the solid material may be a silicone, or a thermally conductive silicone sheath. It is possible that the solid material is a thermally conductive foil.
  • the solid material may be arranged only in a certain area in the gap, that is, in a region of the gap between the central portions and / or between the bottom portions.
  • the solid material may e.g. along the gap also be interrupted in this arranged.
  • the solid material fills the entire gap between the opposite central portions or bottom portions of the inner pot and the outer pot throughout.
  • it may be provided to arrange the solid material throughout the gap between the middle sections and the bottom sections.
  • the solid material fills the gap in the axial direction along the gap seen at least partially, wherein the solid material completely fills the gap in this area seen in the radial direction.
  • the solid material is virtually a bridge between the inner circumference of the outer pot and the outer circumference of the inner pot.
  • the term "along the gap in the axial direction" in the context of the invention includes both the gap between the center sections and between the preferably curved bottom sections, wherein the term "radial direction" in the meaning of the invention to the gap between the inner diameter of the outer pot and the Outer diameter of the inner pot and that relates to both the central portion and the preferred curved bottom portion.
  • Targeting within the meaning of the invention is when the solid material is connected to the inner pot or at least rests on the outer circumference, which refers to a pre-assembly.
  • the solid material is at least partially, as explained above, both with the inner circumference of the outer pot and with the outer circumference of the inner pot in connection.
  • the solid material is shrunk onto the inner pot in the manner of a shrink tube.
  • the outer pot initially has a larger inner diameter than necessary, which is achieved by means of heating. If the outer pot subsequently cools down, the inner diameter, which is necessary due to the design, has an inner diameter that is necessary for its construction, and is connected to it at least in regions, interrupted or completely connected to the solid material.
  • the flange connection between the inner pot and the outer pot requires no additional sealing measures.
  • the flange can have, for example, a screw without regard to any leaking liquid media, of course, optionally a seal, for example, can be provided as an O-ring seal.
  • a seal for example, can be provided as an O-ring seal.
  • the inner pot can be formed from a nickel-based alloy, for example from a Hastelloy®, wherein the outer pot can be formed from a titanium alloy.
  • the outer pot when the outer pot is formed of a titanium alloy, there are many advantages, since this material has a high electrical resistance, high strength and good thermal conductivity, which results in a significant reduction of the total magnetic power loss, which is advantageous to the Energyef- efficiency of the magnetic coupling pump. Also, the wall thickness of the outer pot can be reduced in the central portion due to the properties of the titanium alloy and, for example, have an amount of 0.5 mm, which then results in a further reduction of the magnetic power loss. The mentioned amount is of course only exemplary and by no means limiting.
  • the solid material is designed as a separate material to the two pots, however, with preferably two pots each standing in conjunction and has a dual function.
  • the solid material has a stability effect of the two split pots, which are advantageously spaced apart from each other in the respective middle section and bottom section.
  • the solid material assumes the function of heat transfer from the outer pot in the pumped medium.
  • the outer pot and inner pot are individually independently interchangeable, since only the flange screw must be solved. So if only one of the two pots is defective, only this must be replaced, which is particularly beneficial especially in the used, high-priced pot materials.
  • the inner pot and the outer pot have no contact zones either in the middle section or in the bottom section. Rather, the outer pot and the inner pot along the gap in the middle and bottom portion in the axial direction are kept completely non-contact, with a also be introduced in the inner periphery of the outer pot route network deleted.
  • FIG. 1 shows a magnetic coupling pump in a sectional view
  • Fig. 2 shows a double-walled containment shell of a magnetic drive pump in a sectional view.
  • Figure 1 shows a magnetic coupling pump 1 which has an inner rotor and an outer rotor, each carrying magnets, and with a pump shaft 2, for example as a stainless steel shaft 2, which carries an impeller 3, and which is mounted in a hydrodynamic sliding bearing 4, wherein the hydrodynamic sliding bearing 4 can be externally lubricated by the conveying medium, but also with another, product-compatible fluid.
  • the magnetic coupling pump 1 is known per se, which is why it is not described in detail.
  • FIG. 2 shows a split pot 6 of the magnetic coupling pump 1 of Figure 1, wherein the containment shell 6 is designed as a double-walled containment shell 6 having an outer pot 7 and an inner pot 8, each having a flange 17 and 18, a central portion 11, 12 and a bottom portion 13, 14, wherein between the respective central portion 11, 12 and the respective bottom portion 13, 14, a gap 16 is arranged.
  • the inner pot 8 is connected via its flange 17 to the flange 18 of the outer pot 7. It is advantageously provided that the gap 16 is at least partially filled with a solid material 19.
  • the solid material 19 is indicated in Figure 2 as a solid line.
  • the respective central portion 11, 12 is seen in section, each cylindrical, wherein each of the respective central portion 11, 12 adjoining bottom portion 13,14 is curved. Both vaults are equally oriented.
  • the gap 16 is continuously and completely filled both in the axial direction and in the radial direction with the solid material 19. Only in a pocket 21, which in each case is due to production between a transition region of the bottom portion 14 of the outer pot 7 to the central portion 12 is present, no solid material is arranged.
  • a screw connection for connecting the two flanges 17 and 18, a screw connection, not shown, is provided. Since solid material 19 is arranged according to the invention in the gap 16, the flange connection between the inner pot 8 and the outer pot 7 does not require any additional sealing measures, wherein in FIG. 2 an optional seal 9 is arranged, for example in the embodiment as an O-ring seal 9.
  • the solid material 19 is arranged and designed so that both the inner periphery 22 of the outer pot 7 and the outer periphery 23 of the inner pot 8 are in communication with the solid material 19.
  • both the respective central portion 11, 12 and the respective bottom portion 13,14 held completely free of contact. Only the flanges 17 and 18 are in mutual contact.
  • Figure 2 also shows a test port 24 with corresponding test device 25, which is arranged in the flange 18 of the outer pot 7, so that a defective inner pot 8 and / or outer pot 7 can be detected, with a defective inner or outer pot a mass pressure change of the solid material 19 is receivable.
  • the solid material 19 in the gap 16 is in the introduced in the gap 16 and this filling state an absolutely flow-incompatible material, wherein the solid material is preferably a solid plastic or a silicone.
  • the solid material 19 can be shrunk onto the outer circumference 23 of the inner pot 8, for example, in the manner of a heat-shrinkable tube. It is also possible to introduce as a solid material silicone in the mounted double-walled containment shell 6, which is flowable only for filling purposes, but then solidified to an absolutely flow-resistant permanently elastic mass.

Abstract

L'invention concerne un entraînement magnétique, en particulier une pompe à entraînement magnétique, comportant un rotor intérieur et un rotor extérieur qui portent chacun des aimants entre lesquels est agencée une chemise d'entrefer (6) à double paroi qui comporte une chemise extérieure (7) et une chemise intérieure (8) présentant chacune une bride (17, 18), une partie centrale (11, 12), une partie fond (13, 14). Un entrefer (16) est agencé entre la partie centrale (11, 12) et la partie fond (13, 14), et la chemise intérieure (8) est raccordée par la bride (17) à la bride (18) de la chemise extérieure (7). Selon l'invention, l'entrefer (16) est au moins par endroits rempli d'un matériau solide (19).
EP13753527.4A 2012-07-06 2013-06-25 Chemise d'entrefer à double paroi d'un entraînement magnétique, en particulier d'une pompe à entraînement magnétique Withdrawn EP2870362A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202012006480U DE202012006480U1 (de) 2012-07-06 2012-07-06 Doppelwandiger Spalttopf einer Magnetkupplung, insbesondere einer Magnetkupplungspumpe
PCT/DE2013/000331 WO2014005564A1 (fr) 2012-07-06 2013-06-25 Chemise d'entrefer à double paroi d'un entraînement magnétique, en particulier d'une pompe à entraînement magnétique

Publications (1)

Publication Number Publication Date
EP2870362A1 true EP2870362A1 (fr) 2015-05-13

Family

ID=46831999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13753527.4A Withdrawn EP2870362A1 (fr) 2012-07-06 2013-06-25 Chemise d'entrefer à double paroi d'un entraînement magnétique, en particulier d'une pompe à entraînement magnétique

Country Status (5)

Country Link
US (1) US9617999B2 (fr)
EP (1) EP2870362A1 (fr)
CN (1) CN104411978B (fr)
DE (2) DE202012006480U1 (fr)
WO (1) WO2014005564A1 (fr)

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DE202012006480U1 (de) * 2012-07-06 2012-08-06 Ruhrpumpen Gmbh Doppelwandiger Spalttopf einer Magnetkupplung, insbesondere einer Magnetkupplungspumpe
DE102012024130B4 (de) * 2012-12-11 2014-09-11 Klaus Union Gmbh & Co. Kg Spalttopf für magnetgekuppelte Pumpen sowie Herstellungsverfahren
DE102013214736A1 (de) * 2013-07-29 2015-02-19 Eagleburgmann Germany Gmbh & Co. Kg Bohrlochanordnung mit Magnetkupplung und Druckausgleich
DE102013018159A1 (de) * 2013-12-05 2015-06-11 Klaus Union Gmbh & Co. Kg Spalttopf und Verfahren zur Herstellung desselben
CN104088797B (zh) * 2014-06-25 2017-02-15 安徽盛唐泵阀制造有限公司 一种防结晶磁力泵
CN104564791A (zh) * 2015-01-09 2015-04-29 丹东克隆先锋泵业有限公司 双层隔离套式磁力泵
US9920764B2 (en) 2015-09-30 2018-03-20 Peopleflo Manufacturing, Inc. Pump devices
CN105422500A (zh) * 2015-12-17 2016-03-23 米顿罗工业设备（上海）有限公司 一种双层分离式隔离罩
DE102018113636B4 (de) * 2018-06-07 2020-02-13 Klaus Union Gmbh & Co. Kg Magnetgekuppelte Pumpe mit doppelschaligem Spalttopf
DE102019002797A1 (de) 2019-04-17 2020-10-22 KSB SE & Co. KGaA Spalttopf
CN112228384A (zh) * 2020-09-22 2021-01-15 安徽银龙泵阀股份有限公司 一种磁力泵用自密封式隔离套
US11603845B2 (en) * 2021-02-11 2023-03-14 Zi Yi Electrical Engineering Co., Ltd. Magnetic drive pump
US20230358242A1 (en) * 2022-05-03 2023-11-09 General Electric Company High pressure magnetic coupling shrouds and methods of producing the same
DE102022001932A1 (de) 2022-06-03 2023-12-14 KSB SE & Co. KGaA Gedämpfter Volumenkörper

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Also Published As

Publication number Publication date
US9617999B2 (en) 2017-04-11
WO2014005564A1 (fr) 2014-01-09
DE202012006480U1 (de) 2012-08-06
CN104411978A (zh) 2015-03-11
CN104411978B (zh) 2016-12-14
DE112013003463A5 (de) 2015-03-19
US20150206637A1 (en) 2015-07-23

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