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EP1777414A1 - Magnetic pump drive - Google Patents

Magnetic pump drive Download PDF

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Publication number
EP1777414A1
EP1777414A1 EP05023064A EP05023064A EP1777414A1 EP 1777414 A1 EP1777414 A1 EP 1777414A1 EP 05023064 A EP05023064 A EP 05023064A EP 05023064 A EP05023064 A EP 05023064A EP 1777414 A1 EP1777414 A1 EP 1777414A1
Authority
EP
European Patent Office
Prior art keywords
road network
pump drive
pot
magnetic pump
drive 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.)
Granted
Application number
EP05023064A
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German (de)
French (fr)
Other versions
EP1777414B1 (en
Inventor
Thomas Eschner
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.)
Klaus Union GmbH and Co KG
Original Assignee
Klaus Union GmbH and Co KG
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
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Application filed by Klaus Union GmbH and Co KG filed Critical Klaus Union GmbH and Co KG
Priority to ES05023064T priority Critical patent/ES2741644T3/en
Priority to EP05023064.8A priority patent/EP1777414B1/en
Publication of EP1777414A1 publication Critical patent/EP1777414A1/en
Application granted granted Critical
Publication of EP1777414B1 publication Critical patent/EP1777414B1/en
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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
    • F04D13/021—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
    • F04D13/026—Details of the bearings
    • 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

Definitions

  • the opposite, attracting magnets of the driver and the rotor must be arranged close to each other, in which case production tolerances and, above all, safety considerations play a role.
  • a distance of about 4 mm is usually present between the opposing permanent magnets, this so-called air gap of the cylindrical Part of the split pot is traversed, which usually has a thickness of 1-2 mm.
  • the containment shell When bearing damage to the driver and the runner and in case of unforeseen solid infestation of the fluid, it can happen again and again that the containment shell is damaged, so that until then held under sealing fluid enters the open This danger is known to be encountered, the containment shell double-walled, or to provide an air-filled or evacuated intermediate space, in particular a road network, between two contacting gap pots, wherein in each case a display device can be connected to the intermediate space or to the road network, with the aid of which a pressure change and thus damage can be detected.
  • the invention has for its object to provide a magnetic pump drive of the type mentioned, in which also the heat generated in the outer pot is reliably dissipated.
  • Characteristic of the invention- ⁇ en magnetic pump drive is the arrangement of a liquid medium in the Space between the outer pot and the inner pot.
  • a liquid medium is in the context of the application while any medium that has sufficient viscosity, such as.
  • As gaps, all areas of the containment shell between the outer pot and the inner pot are considered, where they do not abut each other. This can result both due to the existing surface roughness, as well as from a selected arrangement and / or configuration of the facing contact surfaces of the outer and inner pot.
  • the arrangement of the liquid medium in the interstices increases the thermal conductivity between the outer pot and inner pot and thus ensures that - even with large-volume pumps - the entire accumulating during operation of the pump in the outer pot heat can be reliably discharged through the inner pot to the medium to be delivered. Thus, damage to the pump due to heat-induced deformation of the can is effectively prevented. It can be dispensed with an expensive surface treatment of the outer and inner pot to increase the thermal conductivity. At their open end faces of the inner pot and the outer pot are connected to each other, for example, glued or welded, that the liquid medium can not escape from the gap.
  • the liquid medium to be used can basically be chosen freely, wherein application-specific different media can be used. If the interstices result solely from the surface roughness of the inner and outer pot, the use of a highly flowable liquid medium is recommended, whereas in the case of the existence of defined interstices, liquid media having a lower flow behavior or pasty masses can also be used.
  • the liquid media used have a particularly good thermal conductivity, in particular thermally conductive oils are characterized by their special fluidity and high thermal conductivity of more than 1 w / m ⁇ , whereby a particularly good heat dissipation is ensured.
  • the outer pot and the inner pot touch at least in the region of the cylindrical lateral surface and within this contact zone, a path network forming the intermediate space is embedded in the contacting surfaces.
  • a defined road network allows a particularly reliable determination of damage to the inner or outer pot, in particular of pressure changes. Damage can be detected particularly early and with high reliability, whereby in particular faulty arms are prevented in a particular way.
  • a particularly effective and statically favorable road network results when, according to an advantageous embodiment of the invention, the road network is embedded in the inside of the outer pot.
  • the road network consists of a cut into the gap pot coil, which opens preferably at the open end of the double-shell containment shell in an externally accessible first port for filling the road network with the liquid medium. Since damage, especially of the inner pot, occur primarily as recessed rills on a circular path, there is a very high probability that at least one point of the coil is detected in case of damage to the inner pot when using a helix as a road network. This allows with the help of a monitoring of the road network with a basically arbitrarily designed device for detecting damage to the inner or outer pot, in particular via a pressure sensing the triggering of an immediate alarm.
  • the use of a first connection provided according to an advantageous development already constitutes a convenient filling possibility of the intermediate space or of the road network.
  • this connection can be used after filling to arrange a device for detecting damage to the inner or outer pot, in particular pressure measuring device .
  • the intermediate space, in particular the road network is connected to an externally accessible second port for removing the liquid medium from the road network and / or for venting the road network, the second port preferably at the end opposite the first port the road network is arranged.
  • the static arrangement of the liquid medium is sufficient to ensure sufficient heat conduction from the outer pot.
  • the arrangement of a second connection which can be used for venting, so that a particularly simple filling by the first connection is possible, but can also be used to build a cooling circuit in which the liquid medium circulates through the network of paths and thereby accumulating heat removed. This may be particularly advantageous if, contrary to expectations, the thermal conductivity achieved by the arrangement of the liquid medium is not sufficient in special applications to dissipate all heat from the outer and / or inner pot.
  • the second connection in the case of use as a vent opening, can be used to accommodate a device for detecting damage to the containment shell, in particular a pressure-measuring device. If no such device is provided, as in the case of the use of a single port, the ports may be sealed after filling the gaps.
  • the intermediate space in particular the road network, with an externally accessible third port for connecting a device for detecting damage to the inner or Au- ⁇ entopfs, in particular for pressure measurement in the road network and / or an externally accessible fourth connection for cleaning the gap, in particular the road networks connected.
  • a separate terminal for a display device makes it possible to select this, for example, a pressure measuring device, regardless of the configuration of the terminal, since connection compatibilities can remain unaffected.
  • this third connection can be used to connect the display device, if monitoring of the inner and outer pot is not already carried out on the circulation-causing device.
  • a purging of the intermediate space can take place through the first, second or third connection, wherein a purging is required if, as a consequence of a Leaks the medium to be pumped has come into the gap and must be transported out of this before the pump can be opened. This is particularly necessary if the medium to be delivered has toxic properties.
  • the arrangement of a separate fourth terminal according to this embodiment of the invention allows a particularly good adaptation to be connected to the fourth terminal cleaning device.
  • FIG. 1 The reproduced in Fig. 1 embodiment of the invention shows a coupling housing 1 to which the pump housing, not shown in detail, is fastened by means of tie rods in the rule.
  • an impeller 2 Within the pump housing rotates an impeller 2, which is connected by means of a shaft 3 with an inner rotor 8.
  • the shaft 3 and the inner rotor 8 form an integral part.
  • the shaft 3 is supported by means of a thrust bearing 4 and with the help of lateral thrust washers 5 immediately behind the impeller 2, while the rotor 8 is guided by means of a separate radial bearing, which consists of a peripheral bearing ring 6 and a stationary bearing ring 7
  • a driver 10 is rotatably mounted, which is secured by means of a shaft nut 9 on a shaft only partially shown.
  • the driver 10 has a bell-shaped shape, and within the cavity is a double-shell containment shell 11, which in turn engages the rotor 8 like a bell.
  • permanent magnets 12 are mounted in pairs, wherein, based on each of the driver 10 or the rotor 8, the magnetic polarity alternate. So there are a south pole of the driver 10 and a north pole of the rotor 8, next to a north pole of the driver 10 and a south pole of the rotor 8 opposite, etc. With the help of these permanent magnets 12, the driving force of an electric motor, not shown here via the driver 10th transferred to the rotor 8 and thus to the impeller 2.
  • the double-shell containment shell 11 consists of an outer pot 15 and an inner pot 16, which are inserted into one another and abut each other in their cylindrical areas. This can also be done under bias. In the bottom region, a distance between the two pots 15 and 16 is present, which is a few tenths of a millimeter, that is less than in Fig. 1 shown in the cylindrical shell region of the outer pot 15 and the inner pot 16 is a cut into the inside of the outer pot 15 or embossed coil 17, which opens into a collection chamber-like annular space 18. It is so far pronounced that the space between the two bottoms of the pots 15, 16 is in flow-conducting connection with the coil 17.
  • a line for filling the coil and the annular space can be connected with a liquid medium.
  • the port 20 may be used to connect a pressure gauge, liquid sensor or other pressure gauges which will cause the integrity of both pots 15, 16 to be monitored in such a way as to trigger an alarm whenever the coil 17 or the gauges Gap between the floors connection with the pumped medium (damaged inner pot 16) or with the atmosphere (damaged outer pot 15) gets
  • the coil 17 can be designed approximately arbitrarily, as long as sufficient heat conduction through the arranged in the coil 17 liquid medium and a sufficient control function is possible. For a sufficient safe monitoring a depth of a few tenths of a millimeter, while the slope should be chosen so that on the one hand a good detection of all surface areas is present, on the other hand, however, the outer pot 15 is not weakened unnecessarily. In the illustrated embodiment, both the outer pot 15 and the inner pot 16 are able to withstand the operating pressure of the pump alone, so that there is no risk of bursting in the damage of one of the two pots 15, 16

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

Abstract

The magnetic pump drive has a motor-driven driver (10) surrounding a rotor (8) each fitted with opposing magnets (12). A fluid medium such as a heat-conductive oil, fills out the interspace between the outer pot (15) and inner pot (11) surrounding the rotor. The interspace is sealed from the pump delivery medium. The outer pot and inner pot contact one another at least in the area of the cylindrical sleeve faces and a network path (17) forming the interspace is let into the contacting faces inside the contact zone.

Description

Die Erfindung betrifft einen magnetischen Pumpenantrieb, mit

  • einem von einem Motor angetriebenen Treiber,
  • einem von dem Treiber umfassten Läufer, mit dem das Pumpenlaufrad verbunden ist, wobei Treiber und Läufer mit sich gegenüberliegenden Magneten besetzt sind, und
  • einem feststehenden, aus einem Außentopf und einem Innentopf gebildeten Spalttopf, der den Läufer umschließt, auf seiner Innenseite mit dem Fördermedium der Pumpe in Verbindung steht, gegenüber dem Pumpengehäuse abgedichtet ist, und durch den die Kraft der Magnete zur Bewirkung des Antriebes von dem Treiber auf den Läufer hindurchgeht, wobei
  • der Außentopf und der Innentopf an ihren offenen Stirnseiten derart miteinander verbunden sind, dass ein Zwischenraum zwischen dem Außentopf und dem Innentopf gegenüber dem Fördermedium der Pumpe abgedichtet ist.
The invention relates to a magnetic pump drive, with
  • a motor driven driver,
  • a rotor comprised by the driver to which the pump impeller is connected, drivers and travelers being occupied by opposing magnets, and
  • a fixed containment shell formed of an outer pot and an inner pot, which surrounds the rotor, communicates on its inside with the pumped fluid of the pump, is sealed off from the pump housing, and by the force of the magnets for effecting the drive from the driver the runner passes, where
  • the outer pot and the inner pot are connected to each other at their open end faces such that a gap between the outer pot and the inner pot is sealed against the pumped fluid of the pump.

Derartige Pumpenantriebe sind seit langem bekannt. Sie haben sich in der chemischen, insbesondere petrochemischen Industrie sowie in der Reaktortechnik als zuverlässig und betriebssicher erwiesen, wenn es darum geht, eine Wellendichtung herkömmlicher Art zu vermeiden. Infolge der eingangs genannten Pumpenantriebe sind nur noch statische Dichtungen vorhanden, die problemlos beherrscht werden und kein Risiko bezüglich eines ungewollten Flüssigkeitsaustritts bergen.Such pump drives have long been known. They have proven to be reliable and reliable in the chemical, in particular petrochemical and reactor technology, when it comes to avoiding a shaft seal of conventional type. As a result of the pump drives mentioned above, only static seals are present, which are easily controlled and do not pose any risk of unwanted liquid leakage.

Aus Gründen eines guten Wirkungsgrades müssen die sich gegenüberliegenden, einander anziehenden Magnete des Treibers und des Läufers nah aneinander angeordnet sein, wobei hier Fertigungstoleranzen und vor allen Dingen Sicherheitsüberlegungen eine Rolle spielen. Im Ergebnis ist zwischen den sich gegenüberliegen Permanentmagneten in der Regel ein Abstand von ca. 4 mm vorhanden, wobei dieser sogenannte Luftspalt von dem zylindrischen Teil des Spalttopfes durchzogen wird, welcher in der Regel eine Dicke von 1-2 mm aufweist.For reasons of good efficiency, the opposite, attracting magnets of the driver and the rotor must be arranged close to each other, in which case production tolerances and, above all, safety considerations play a role. As a result, a distance of about 4 mm is usually present between the opposing permanent magnets, this so-called air gap of the cylindrical Part of the split pot is traversed, which usually has a thickness of 1-2 mm.

Bei Lagerschäden am Treiber und am Läufer sowie bei unvorhergesehenem Feststoffbefall des Fördermediums kann es immer wieder vorkommen, dass der Spalttopf beschädigt wird, so dass das bis dahin unter Abdichtung gehaltene Fördermedium ins Freie gelangt Dieser Gefahr wird bekanntermaßen dadurch begegnet, den Spalttopf doppelwandig auszubilden, bzw. zwischen zwei sich berührenden Spalttöpfen einen luftgefüllten oder evakuierten Zwischenraum, insbesondere ein Wegenetz vorzusehen, wobei an dem Zwischenraum, bzw. an das Wegenetz jeweils eine Anzeigevorrichtung anschließbar ist, mit deren Hilfe eine Druckänderung und damit eine Beschädigung feststellbar ist.When bearing damage to the driver and the runner and in case of unforeseen solid infestation of the fluid, it can happen again and again that the containment shell is damaged, so that until then held under sealing fluid enters the open This danger is known to be encountered, the containment shell double-walled, or to provide an air-filled or evacuated intermediate space, in particular a road network, between two contacting gap pots, wherein in each case a display device can be connected to the intermediate space or to the road network, with the aid of which a pressure change and thus damage can be detected.

Bei den bekannten magnetischen Pumpenantrieben, von denen einer in der EP 0 286 822 B1 beschrieben ist, werden systembedingt in dem Spalttopf Wirbelströme induziert, die in dem metallischen Material des Spalttopfes in Wärme umgesetzt werden. Insbesondere bei großvolumigen Pumpen kann zwar die im Innentopf anfallende Wärme über das zu fordernde Medium abgeführt werden. Die im Außentopf erzeugte Wärme kann jedoch nicht ausreichend über die den Außentopf umgebende Atmosphäre abgeleitet werden. Ferner ist auch die Wärmeleitfähigkeit zwischen dem Innentopf und dem Außentopf infolge der luftgefüllten oder evakuierten Zwischenräume, insbesondere im Falle eines vorhandenen Wegenetzes unter ungünstigen Umständen, nicht ausreichend, um die in dem Außentopf anfallende Wirme über den Innentopf an das zu fordernde Medium abzugeben. Infolgedessen kommt es bei übermäßiger Erwärmung zu Verformungen des Außentopfes, die zu einer Beschädigung der Pumpe führen.In the known magnetic pump drives, one of which in the EP 0 286 822 B1 is described systemically induced eddy currents in the containment shell, which are converted into heat in the metallic material of the containment shell. In particular, in the case of large-volume pumps, the heat accumulating in the inner pot can be dissipated via the medium to be demanded. However, the heat generated in the outer pot can not be sufficiently dissipated via the atmosphere surrounding the outer pot. Furthermore, the thermal conductivity between the inner pot and the outer pot due to the air-filled or evacuated spaces, especially in the case of an existing road network under unfavorable circumstances, not sufficient to deliver the costs incurred in the outer pot Wirme the inner pot to the medium to be challenged. As a result, excessive heating will cause deformation of the outer pot resulting in damage to the pump.

Der Erfindung liegt die Aufgabe zugrunde, einen magnetischen Pumpenantrieb der eingangs genannten Art bereitzustellen, bei dem auch die in dem Außentopf erzeugte Wärme zuverlässig abgeführt wird.The invention has for its object to provide a magnetic pump drive of the type mentioned, in which also the heat generated in the outer pot is reliably dissipated.

Die Erfindung löst die Aufgabe durch einen magnetischen Pumpenantrieb mit dem Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen des magnetischen Pumpenantriebs sind in den abhängigen Ansprüchen angegeben. Kennzeichnend für den erfindungsgemä-βen magnetischen Pumpenantrieb ist die Anordnung eines flüssigen Mediums in dem Zwischenraum zwischen dem Außentopf und dem Innentopf. Ein flüssiges Medium ist im Rahmen der Anmeldung dabei jedes Medium, das eine ausreichende Viskosität besitzt, wie z. B. Flüssigkeiten oder pastöse Massen, um selbstständig oder unter Druck in den oder die Zwischenräume zu gelangen. Als Zwischenräume werden dabei alle Bereiche des Spalttopfs zwischen dem Außentopf und dem Innentopf angesehen, an denen diese nicht aneinander anliegen. Dies kann sowohl aufgrund der vorhandenen Oberflächenrauhigkeiten, als auch aus einer gewählten Anordnung und/oder Ausgestaltung der einander zugewandten Kontaktflächen des Außen- und Innentopfes resultieren. Die Anordnung des flüssigen Mediums in den Zwischenräumen erhöht die Wärmeleitfähigkeit zwischen dem Außentopf und Innentopf und gewährleistet so, daß - auch bei großvolumigen Pumpen - die gesamte im Betrieb der Pumpe im Außentopf anfallende Wärme zuverlässig über den Innentopf an das zu fördernde Medium abgegeben werden kann. Somit wird einer Beschädigung der Pumpe in Folge von wärmebedingten Verformungen des Spalttopfes wirksam vorgebeugt. Dabei kann auf eine kostenintensive Oberflächenbearbeitung des Außen- und Innentopfes zur Erhöhung der Wärmeleitfähigkeit verzichtet werden. An ihren offenen Stirnseiten sind der Innentopf und der Außentopf derart miteinander verbunden, bspw. verklebt oder verschweißt, dass das flüssige Medium nicht aus dem Zwischenraum austreten kann.The invention solves the problem by a magnetic pump drive with the features of claim 1. Advantageous developments of the magnetic pump drive are specified in the dependent claims. Characteristic of the invention-βen magnetic pump drive is the arrangement of a liquid medium in the Space between the outer pot and the inner pot. A liquid medium is in the context of the application while any medium that has sufficient viscosity, such as. As liquids or pasty masses to get into the space or on its own or under pressure. As gaps, all areas of the containment shell between the outer pot and the inner pot are considered, where they do not abut each other. This can result both due to the existing surface roughness, as well as from a selected arrangement and / or configuration of the facing contact surfaces of the outer and inner pot. The arrangement of the liquid medium in the interstices increases the thermal conductivity between the outer pot and inner pot and thus ensures that - even with large-volume pumps - the entire accumulating during operation of the pump in the outer pot heat can be reliably discharged through the inner pot to the medium to be delivered. Thus, damage to the pump due to heat-induced deformation of the can is effectively prevented. It can be dispensed with an expensive surface treatment of the outer and inner pot to increase the thermal conductivity. At their open end faces of the inner pot and the outer pot are connected to each other, for example, glued or welded, that the liquid medium can not escape from the gap.

Unter den o. g. Voraussetzungen kann das zu verwendende flüssige Medium grundsätzlich frei gewählt werden, wobei anwendungsspezifisch unterschiedliche Medien zum Einsatz kommen können. Falls die Zwischenräume allein aufgrund der Oberflächenrauhigkeit des Innen- und Außentopfes resultieren, empfiehlt sich die Verwendung eines sehr fließfähigen flüssigen Mediums, wohingegen im Falle des Bestehens von definierten Zwischenräumen auch flüssige Medien mit einem geringeren Fließverhalten oder pastöse Massen verwendbar sind. Gemäß einer besonders vorteilhaften Ausgestaltung der Erfindung weisen die verwendeten flüssigen Medien eine besonders gute Wärmeleitfähigkeit auf, wobei insbesondere wärmeleitfähige Öle sich durch ihre besondere Fließfähigkeit und ihre hohe Wärmeleitfähigkeit von mehr als 1w/mκ auszeichnen, wodurch eine besonders gute Wärmeabfuhr gewährleistet wird.Under the above-mentioned conditions, the liquid medium to be used can basically be chosen freely, wherein application-specific different media can be used. If the interstices result solely from the surface roughness of the inner and outer pot, the use of a highly flowable liquid medium is recommended, whereas in the case of the existence of defined interstices, liquid media having a lower flow behavior or pasty masses can also be used. According to a particularly advantageous embodiment of the invention, the liquid media used have a particularly good thermal conductivity, in particular thermally conductive oils are characterized by their special fluidity and high thermal conductivity of more than 1 w / mκ , whereby a particularly good heat dissipation is ensured.

Grundsätzlich besteht die Möglichkeit, unabhängig von der Ausgestaltung der Kontaktflächen des Außen- und Innentopfes, an den mit dem flüsigen Medium gefüllten Zwischenraum eine Anzeigevorrichtung anzuschließen, mit deren Hilfe, bspw. durch eine Überwachung des Drucks im Zwischenraum, eine Beschädigung des Innen- oder Außentopfes feststellbar ist. Nach einer vorteilhaften Ausgestaltung der Erfindung berühren sich der Außentopf und der Innentopf zumindest im Bereich der zylindrischen Mantelfläche und innerhalb dieser Berührzone ist ein den Zwischenraum bildendes Wegenetz in die sich berührenden Flächen eingelassen. Ein definiertes Wegenetz ermöglicht dabei eine besonders zuverlässige Feststellung von Beschädigungen des Innen- oder Außentopfs, insbesondere von Druckänderungen. Beschädigungen sind besonders früh und mit hoher Zuverlässigkeit feststellbar, wobei insbesondere FehIalarmen in besonderer Weise vorgebeugt wird.Basically, it is possible, regardless of the design of the contact surfaces of the outer and inner pot, to connect to the filled with the liquid medium gap a display device, with their help, for example. By monitoring the pressure in the space, damage to the inner or outer pot is detected. According to an advantageous embodiment of the invention, the outer pot and the inner pot touch at least in the region of the cylindrical lateral surface and within this contact zone, a path network forming the intermediate space is embedded in the contacting surfaces. A defined road network allows a particularly reliable determination of damage to the inner or outer pot, in particular of pressure changes. Damage can be detected particularly early and with high reliability, whereby in particular faulty arms are prevented in a particular way.

Ein besonders wirkungsvolles und statisch günstiges Wegenetz ergibt sich dann, wenn nach einer vorteilhaften Weiterbildung der Erfindung das Wegenetz in die Innenseite des Außentopfes eingelassen ist. Insbesondere wenn das Wegenetz aus einer in den Spalttopf eingeschnittenen Wendel besteht, welche vorzugsweise am offenen Ende des doppelschaligen Spalttopfs in einen von außen zugänglichen ersten Anschluß zum Befüllen des Wegenetzes mit dem flüssigen Medium mündet. Da Beschädigungen, insbesondere des Innentopfs, vornehmlich als sich vertiefende Riefungen auf einer Kreisbahn auftreten, besteht bei der Verwendung einer Wendel als Wegenetz eine sehr hohe Wahrscheinlichkeit, daß mindestens eine Stelle der Wendel bei einer Beschädigung des Innentopfes erfasst wird. Das ermöglicht mit Hilfe einer Überwachung des Wegenetzes mit einer grundsätzlich beliebig ausgebildeten Vorrichtung zur Feststellung einer Beschädigung des Innen- oder Außentopfs, insbesondere über eine Druckabfragung die Auslösung eines sofortigen Alarms.A particularly effective and statically favorable road network results when, according to an advantageous embodiment of the invention, the road network is embedded in the inside of the outer pot. In particular, when the road network consists of a cut into the gap pot coil, which opens preferably at the open end of the double-shell containment shell in an externally accessible first port for filling the road network with the liquid medium. Since damage, especially of the inner pot, occur primarily as recessed rills on a circular path, there is a very high probability that at least one point of the coil is detected in case of damage to the inner pot when using a helix as a road network. This allows with the help of a monitoring of the road network with a basically arbitrarily designed device for detecting damage to the inner or outer pot, in particular via a pressure sensing the triggering of an immediate alarm.

Grundsätzlich stellt bereits die gemäß einer vorteilhaften Weiterbildung vorgesehene Verwendung eines ersten Anschlusses eine komfortable Befüllmöglichkeit des Zwischenraums bzw. des Wegenetzes dar. Darüber hinaus kann dieser Anschluß nach dem Befüllen zur Anordnung einer Vorrichtung zur Feststellung einer Beschädigung des Innen- oder Außentopfes, insbesondere Druckmesseinrichtung verwendet werden. Nach einer vorteilhaften Weiterbildung der Erfindung ist der Zwischenraum, insbesondere das Wegenetz, mit einem von außen zugänglichen zweiten Anschluss zur Abfuhr des flüssigen Mediums aus dem Wegenetz und/oder zur Entlüftung des Wegenetzes verbunden, wobei der zweite Anschluss vorzugsweise an dem dem ersten Anschluss gegenüberliegenden Ende des Wegenetzes angeordnet ist.In principle, the use of a first connection provided according to an advantageous development already constitutes a convenient filling possibility of the intermediate space or of the road network. In addition, this connection can be used after filling to arrange a device for detecting damage to the inner or outer pot, in particular pressure measuring device , According to an advantageous development of the invention, the intermediate space, in particular the road network, is connected to an externally accessible second port for removing the liquid medium from the road network and / or for venting the road network, the second port preferably at the end opposite the first port the road network is arranged.

Grundsätzlich reicht bereits die statische Anordnung des flüssigen Mediums aus, um eine ausreichende Wärmeleitung aus dem Außentopf zu gewährleisten. Die Anordnung eines zweiten Anschlusses, welcher zur Entlüftung verwenbar ist, so dass ein besonders einfaches Befüllen durch den ersten Anschluss möglich ist, kann jedoch auch dazu genutzt werden, um einen Kühlkreislauf aufzubauen, bei dem das flüssige Medium durch das Wegenetz zirkuliert und dabei anfallende Wärme abtransportiert. Dies kann insbesondere dann von Vorteil sein, wenn wider Erwarten die durch die Anordnung des flüssigen Mediums erreichte Wärmeleitfähigkeit in speziellen Anwendungsfällen nicht ausreicht, um sämtliche Wärme aus dem Außen- und/oder Innentopf abzuführen.Basically, even the static arrangement of the liquid medium is sufficient to ensure sufficient heat conduction from the outer pot. However, the arrangement of a second connection, which can be used for venting, so that a particularly simple filling by the first connection is possible, but can also be used to build a cooling circuit in which the liquid medium circulates through the network of paths and thereby accumulating heat removed. This may be particularly advantageous if, contrary to expectations, the thermal conductivity achieved by the arrangement of the liquid medium is not sufficient in special applications to dissipate all heat from the outer and / or inner pot.

Im Falle der Verwendung als Entlüftungsöffnung kann der zweite Anschluss, wie auch der erste Anschluss, zur Aufnahme einer Vorrichtung zur Feststellung von Beschädigungen des Spalttopfs, insbesondere einer Druckmesseinrichtung verwendet werden. Falls keine solche Vorrichtung vorgesehen ist, können die Anschlüsse, wie auch im Falle der Verwendung eines einzigen Anschlusses, nach dem Befüllen der Zwischenräume versiegelt werden.In the case of use as a vent opening, the second connection, as well as the first connection, can be used to accommodate a device for detecting damage to the containment shell, in particular a pressure-measuring device. If no such device is provided, as in the case of the use of a single port, the ports may be sealed after filling the gaps.

Nach einer besonders vorteilhaften Weiterbildung der Erfindung ist der Zwischenraum, insbesondere das Wegenetz, mit einem von außen zugänglichen dritten Anschluss zum Anschluss einer Vorrichtung zur Feststellung von Beschädigungen des Innen- oder Au-βentopfs, insbesondere zur Druckmessung im Wegenetz und/oder einem von außen zugänglichen vierten Anschluss zur Reinigung des Zwischenraums, insbesondere des Wegenetze, verbunden. Die Anordnung eines separaten Anschlusses für eine Anzeigevorrichtung ermöglicht es, diese, bspw. eine Druckmesseinrichtung unabhängig von der Ausgestaltung des Anschlusses zu wählen, da Anschlusskompatibilitäten unberüclaichtigt bleiben können. Überdies kann dieser dritte Anschluss im Falle der vorteilhafterweise vorzusehenden Zirkulation des flüssigen Mediums zum Anschluss der Anzeigevorrichtung verwendet werden, wenn eine Überwachung des Innen- und Außentopfes nicht bereits an der die Zirkulation bewirkenden Vorrichtung erfolgt.According to a particularly advantageous embodiment of the invention, the intermediate space, in particular the road network, with an externally accessible third port for connecting a device for detecting damage to the inner or Au-βentopfs, in particular for pressure measurement in the road network and / or an externally accessible fourth connection for cleaning the gap, in particular the road networks connected. The arrangement of a separate terminal for a display device makes it possible to select this, for example, a pressure measuring device, regardless of the configuration of the terminal, since connection compatibilities can remain unaffected. Moreover, in the case of advantageously provided circulation of the liquid medium, this third connection can be used to connect the display device, if monitoring of the inner and outer pot is not already carried out on the circulation-causing device.

Grundsätzlich kann eine Spülung des Zwischenraums durch den ersten, zweiten oder dritten Anschluss erfolgen, wobei eine Spülung dann erforderlich ist, wenn in Folge eines Lecks das zu fördernde Medium in den Zwischenraum gelangt ist und aus diesem herausbefördert werden muss, bevor die Pumpe geöffnet werden kann. Dies ist insbesondere dann zwingend erforderlich, wenn das zu fördernde Medium toxische Eigenschaften besitzt. Die Anordnung eines separaten vierten Anschlusses gemäß dieser Weiterbildung der Erfindung ermöglicht eine besonders gute Anpassung an die an den vierten Anschluss anzuschließende Reinigungsvorrichtung.In principle, a purging of the intermediate space can take place through the first, second or third connection, wherein a purging is required if, as a consequence of a Leaks the medium to be pumped has come into the gap and must be transported out of this before the pump can be opened. This is particularly necessary if the medium to be delivered has toxic properties. The arrangement of a separate fourth terminal according to this embodiment of the invention allows a particularly good adaptation to be connected to the fourth terminal cleaning device.

Nachstehend wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung beschrieben. Die Zeichnung zeigt:

Fig. 1
eine Querschnittsansicht durch einen magnetischen Pumpenantrieb mit einem doppelschaligen Spalttopf.
Hereinafter, an embodiment of the invention will be described with reference to a drawing. The drawing shows:
Fig. 1
a cross-sectional view through a magnetic pump drive with a double-shell containment shell.

Das in der Fig. 1 wiedergegebene Ausführungsbeispiel der Erfindung zeigt ein Kupplungsgehäuse 1, an dem in der Regel das nicht näher dargestellte Pumpengehäuse mit Hilfe von Zugankern befestigt ist. Innerhalb des Pumpengehäuses rotiert ein Laufrad 2, das mit Hilfe einer Welle 3 mit einem Innenläufer 8 verbunden ist. Die Welle 3 und der Innenläufer 8 bilden einen integralen Bestandteil. Die Welle 3 ist mit Hilfe eines Axiallagers 4 und mit Hilfe seitlicher Axiallagerscheiben 5 unmittelbar hinter dem Laufrad 2 gelagert, während der Läufer 8 mit Hilfe eines gesonderten Radiallagers geführt ist, das aus einem umlaufenden Lagerring 6 und einem feststehenden Lagerring 7 bestehtThe reproduced in Fig. 1 embodiment of the invention shows a coupling housing 1 to which the pump housing, not shown in detail, is fastened by means of tie rods in the rule. Within the pump housing rotates an impeller 2, which is connected by means of a shaft 3 with an inner rotor 8. The shaft 3 and the inner rotor 8 form an integral part. The shaft 3 is supported by means of a thrust bearing 4 and with the help of lateral thrust washers 5 immediately behind the impeller 2, while the rotor 8 is guided by means of a separate radial bearing, which consists of a peripheral bearing ring 6 and a stationary bearing ring 7

Innerhalb des Kupplungsgehäuses 1 ist ein Treiber 10 drehbar gelagert, der mit Hilfe einer Wellenmutter 9 auf einer nur partiell dargestellten Welle gesichert ist. Der Treiber 10 hat eine glockenförmige Gestalt, und innerhalb der Höhlung befindet sich ein doppelschaliger Spalttopf 11, der wiederum glockenartig den Läufer 8 übergreift. Auf der Außenseite des Läufers 8 sowie auf der Innenseite des Treibers 10 sind Permanentmagnete 12 paarweise angebracht, wobei sich, bezogen auf jeweils den Treiber 10 oder den Läufer 8, die magnetischen Polungen abwechseln. Es liegen sich also ein Südpol des Treibers 10 und ein Nordpol des Läufers 8, daneben ein Nordpol des Treibers 10 und ein Südpol des Läufers 8 gegenüber usw. Mit Hilfe dieser Permanentmagnete 12 wird die Antriebskraft von einem, hier nicht dargestellten Elektromotor über den Treiber 10 auf den Läufer 8 und damit auf das Pumpenrad 2 übertragen.Within the clutch housing 1, a driver 10 is rotatably mounted, which is secured by means of a shaft nut 9 on a shaft only partially shown. The driver 10 has a bell-shaped shape, and within the cavity is a double-shell containment shell 11, which in turn engages the rotor 8 like a bell. On the outside of the rotor 8 and on the inside of the driver 10 permanent magnets 12 are mounted in pairs, wherein, based on each of the driver 10 or the rotor 8, the magnetic polarity alternate. So there are a south pole of the driver 10 and a north pole of the rotor 8, next to a north pole of the driver 10 and a south pole of the rotor 8 opposite, etc. With the help of these permanent magnets 12, the driving force of an electric motor, not shown here via the driver 10th transferred to the rotor 8 and thus to the impeller 2.

Der doppelschalige Spalttopf 11 besteht aus einem Außentopf 15 sowie aus einem Innentopf 16, die ineinandergesteckt sind und in ihren zylindrischen Bereichen aneinander anliegen. Dies kann auch unter Vorspannung erfolgen. Im Bodenbereich ist ein Abstand zwischen beiden Töpfen 15 und 16 vorhanden, der wenige zehntel Millimeter beträgt, also geringer ist als in der Fig. 1 dargestellt In dem zylindrischen Mantelbereich des Außentopfes 15 sowie des Innentopfes 16 befindet sich eine in die Innenseite des Außentopfes 15 eingeschnittene bzw. eingeprägte Wendel 17, die in einen sammelkammerartigen Ringraum 18 mündet. Sie ist soweit ausgeprägt, daß der Zwischenraum zwischen den beiden Böden der Töpfe 15, 16 in strömungsleitender Verbindung mit der Wendel 17 steht. Zu dem Ringraum 18 führt eine Bohrung 19, die wiederum Verbindung zu einem Anschluss 20 hat An diesen Anschluss 20 können eine Leitung zum Befüllen der Wendel und des Ringraums mit einem flüssigen Medium angeschlossen werden. Nach der Befüllung kann der Anschluss 20 zum Anschluss eines Manometers, eines Flüssigkeitsfühlers oder anderer Druckmesseinrichtungen verwendet werden, die eine Überwachung der Unversehrtheit beider Töpfe 15, 16 in der Weise bewirken, dass immer dann ein Alarm ausgelöst wird, wenn die Wendel 17 bzw. der Zwischenraum zwischen den Böden Verbindung mit dem Fördermedium (beschädigter Innentopf 16) bzw. mit der Atmosphäre (beschädigter Außentopf 15) bekommtThe double-shell containment shell 11 consists of an outer pot 15 and an inner pot 16, which are inserted into one another and abut each other in their cylindrical areas. This can also be done under bias. In the bottom region, a distance between the two pots 15 and 16 is present, which is a few tenths of a millimeter, that is less than in Fig. 1 shown in the cylindrical shell region of the outer pot 15 and the inner pot 16 is a cut into the inside of the outer pot 15 or embossed coil 17, which opens into a collection chamber-like annular space 18. It is so far pronounced that the space between the two bottoms of the pots 15, 16 is in flow-conducting connection with the coil 17. To the annular space 18 leads a bore 19, which in turn has a connection to a connection 20 to this connection 20, a line for filling the coil and the annular space can be connected with a liquid medium. After filling, the port 20 may be used to connect a pressure gauge, liquid sensor or other pressure gauges which will cause the integrity of both pots 15, 16 to be monitored in such a way as to trigger an alarm whenever the coil 17 or the gauges Gap between the floors connection with the pumped medium (damaged inner pot 16) or with the atmosphere (damaged outer pot 15) gets

Die Wendel 17 kann annähernd beliebig gestaltet werden, solange eine ausreichende Wärmeleitung über das in der Wendel 17 angeordnete flüssige Medium und eine ausreichende Kontrollfunktion möglich ist. Für eine ausreichende sichere Überwachung reicht eine Tiefe von wenigen zehntel Millimetern aus, während die Steigung so gewählt werden sollte, dass einerseits eine gute Erfassung aller Flächenbereiche vorhanden ist, andererseits jedoch der Außentopf 15 nicht unnötig geschwächt wird. In dem dargestellten Ausführungsbeispiel sind sowohl der Außentopf 15 als auch der Innentopf 16 in der Lage, den Betriebsdruck der Pumpe allein zu widerstehen, so daß bei der Beschädigung des einen der beiden Töpfe 15, 16 keine Berstgefahr bestehtThe coil 17 can be designed approximately arbitrarily, as long as sufficient heat conduction through the arranged in the coil 17 liquid medium and a sufficient control function is possible. For a sufficient safe monitoring a depth of a few tenths of a millimeter, while the slope should be chosen so that on the one hand a good detection of all surface areas is present, on the other hand, however, the outer pot 15 is not weakened unnecessarily. In the illustrated embodiment, both the outer pot 15 and the inner pot 16 are able to withstand the operating pressure of the pump alone, so that there is no risk of bursting in the damage of one of the two pots 15, 16

Statt der Wendel 17 können auch andere Formen zur Durchdringung des Zwischenraums zwischen beiden Töpfen bzw. zur Abfragung des Zwischenraumes zwischen den Böden verwirklicht werden. Z. B. können Längsriefen gleichmäßig um den Umfang verteilt sein, zwischen denen darüber hinaus in Umfangsrichtung Querverbindungen geschaffen werden können und in denen das flüssige Medium angeordnet ist Es kommt lediglich darauf an, dass der Zwischenraum zwischen den beiden Töpfen im wesentlichen in seiner Gesamtheit erfasst wird und mit einem flüssigen Medium gefüllt ist und die Schwächung des doppelschaligen Spalttopfs insgesamt möglichst gering ist.Instead of the helix 17, other forms for the penetration of the space between the two pots or for interrogation of the gap between the floors can be realized. For example, longitudinal scores can be uniform around the circumference Be distributed between which beyond in the circumferential direction cross-connections can be created and in which the liquid medium is arranged It is only important that the space between the two pots is detected in its entirety and is filled with a liquid medium and the Weakening of the double-shell containment shell as low as possible.

Claims (12)

Magnetischer Pumpenantrieb, mit - einem von einem Motor angetriebenen Treiber (10), - einem von dem Treiber (10) umfassten Läufer (8), mit dem das Pumpenlaufrad (2) verbunden ist, wobei Treiber (10) und Läufer (8) mit sich gegenüberliegenden Magneten (12) besetzt sind, und - einem feststehenden, aus einem Außentopf (15) und einem Innentopf (16) gebildeten Spalttopf (11), der dem Läufer (8) umschließt, auf seiner Innenseite mit dem Fördermedium der Pumpe in Verbindung steht, gegenüber dem Pumpengehäuse (1) abgedichtet ist, und durch den die Kraft der Magnete (12) zur Bewirkung des Antriebes von dem Treiber (10) auf den Läufer (8) hindurchgeht, wobei - der Außentopf (15) und der Innentopf (16) an ihren offenen Stirnseiten derart miteinander verbunden sind, dass ein Zwischenraum zwischen dem Außentopf (15) und dem Innentopf (16) gegenüber dem Fördermedium der Pumpe abgedichtet ist, dadurch gekennzeichnet, dass
zwischen dem Außentopf (15) und dem Innentopf (16) ein flüssiges Medium angeordnet ist, das derart ausgebildet ist, dass es den Zwischenraum zwischen dem Außentopf (15) und dem Innentopf (16) ausfüllt.Magnetic pump drive, with a driver (10) driven by a motor, - One of the driver (10) included rotor (8) to which the pump impeller (2) is connected, wherein driver (10) and rotor (8) with opposite magnets (12) are occupied, and - A fixed, from an outer pot (15) and an inner pot (16) formed gap pot (11), which surrounds the rotor (8), on its inside with the pumped fluid of the pump is in communication with the pump housing (1) is sealed , and by which the force of the magnets (12) for causing the drive from the driver (10) on the rotor (8) passes, wherein - The outer pot (15) and the inner pot (16) are connected to each other at their open end faces such that a gap between the outer pot (15) and the inner pot (16) is sealed against the pumped fluid of the pump, characterized in that
between the outer pot (15) and the inner pot (16) a liquid medium is arranged, which is designed such that it fills the space between the outer pot (15) and the inner pot (16). Magnetischer Pumpenantrieb nach Anspruch 1, dadurch gekennzeichnet, dass das flüssige Medium eine gute Wärmeleitfähigkeit aufweist.Magnetic pump drive according to claim 1, characterized in that the liquid medium has a good thermal conductivity. Magnetischer Pumpenantrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass als flüssiges Medium wärmeleitfähige Öle verwendbar sind.Magnetic pump drive according to claim 1 or 2, characterized in that heat-conductive oils can be used as the liquid medium. Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich der Außentopf (15) und der Innentopf (16) zumindest im Bereich der zylindrischen Mantelflächen berühren und innerhalb der Berührzone ein den Zwischenraum bildendes Wegenetz (17) in die sich berührenden Flächen eingelassen ist.Magnetic pump drive according to one of the preceding claims, characterized in that the outer pot (15) and the inner pot (16) touch at least in the region of the cylindrical lateral surfaces and within the contact zone a path network (17) forming the intermediate space is embedded in the contacting surfaces , Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Wegenetz (17) in den Außentopf (15) eingelassen ist.Magnetic pump drive according to one of the preceding claims, characterized in that the road network (17) in the outer pot (15) is embedded. Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Wegenetz (17) aus einer in den Spalttopf (15, 16) eingeschnittenen Wendel (17) besteht.Magnetic pump drive according to one of the preceding claims, characterized in that the road network (17) consists of a spiral (17) cut into the containment shell (15, 16). Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Zwischenraum, insbesondere das Wegenetz (17) mit mindestens einem von außen zugänglichen ersten Anschluss (20) zum Befüllen des Wegenetzes (17) mit dem flüssigen Medium verbunden ist.Magnetic pump drive according to one of the preceding claims, characterized in that the intermediate space, in particular the road network (17) with at least one externally accessible first port (20) for filling the road network (17) is connected to the liquid medium. Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Zwischenraum, insbesondere das Wegenetz (17) mit einem von außen zugänglichen zweiten Anschluss zur Abfuhr des flüssigen Mediums aus dem Wegenetz und/oder zur Entlüftung des Wegenetzes (17) verbunden ist, der vorzugsweise an dem den ersten Anschluss (20) gegenüberliegenden Ende des Wegenetzes (17) angeordnet ist.Magnetic pump drive according to one of the preceding claims, characterized in that the intermediate space, in particular the road network (17) is connected to an externally accessible second port for discharging the liquid medium from the road network and / or for venting the road network (17) preferably at the first terminal (20) opposite end of the road network (17) is arranged. Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Zwischenraum, insbesondere das Wegenetz (17) mit einem von außen zugänglichen dritten Anschluss zum Anschluss einer Vorrichtung zur Feststellung von Beschädigungen des Innen- oder Außentopfes, insbesondere zur Druckmessung im Wegenetz (17) und/oder einem von außen zugänglichen vierten Anschluss zur Reinigung des Zwischenraums, insbesondere des Wegenetzes (17) verbunden ist.Magnetic pump drive according to one of the preceding claims, characterized in that the intermediate space, in particular the road network (17) with an externally accessible third port for connecting a device for detecting damage to the inner or outer pot, in particular for pressure measurement in the road network (17) and / or an externally accessible fourth connection for cleaning the intermediate space, in particular the road network (17) is connected. Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an einem Anschluss (20) insbesondere am dritten Anschluss eine Vorrichtung zur Druckmessung angeschlossen ist.Magnetic pump drive according to one of the preceding claims, characterized in that a device for pressure measurement is connected to a connection (20), in particular to the third connection. Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Wegenetz (17) in eine Sammelkammer (18) mündet, die über ein Bohrung (19) mit dem ersten Anschluss (20) verbunden istMagnetic pump drive according to one of the preceding claims, characterized in that the road network (17) opens into a collecting chamber (18) which is connected via a bore (19) to the first port (20) Magnetischer Pumpenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wanddicke des Außentopfes (15) zur alleinigen Beherrschung des Betriebsdrucks ausreicht und die Wanddicke des Innentopfs (16) im Wesentlichen frei wählbar ist.Magnetic pump drive according to one of the preceding claims, characterized in that the wall thickness of the outer pot (15) is sufficient for the sole control of the operating pressure and the wall thickness of the inner pot (16) is substantially freely selectable.
EP05023064.8A 2005-10-21 2005-10-21 Magnetic pump drive Revoked EP1777414B1 (en)

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ES05023064T ES2741644T3 (en) 2005-10-21 2005-10-21 Magnetic pump drive
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WO2014005564A1 (en) 2012-07-06 2014-01-09 Ruhrpumpen Gmbh Double-walled split case of a magnet coupling, in particular of a magnet coupling pump
DE202012006480U1 (en) 2012-07-06 2012-08-06 Ruhrpumpen Gmbh Double-walled containment shell of a magnetic coupling, in particular a magnetic coupling pump
DE102012017322A1 (en) 2012-09-03 2014-03-06 Klaus Union Gmbh & Co. Kg Stationary containment shell for magnetically-operated clutch pump, has shell main portion whose outer and inner sides are applied with coating consisting of tungsten carbide so that shell is mechanically stabilized
WO2014053290A1 (en) 2012-10-02 2014-04-10 Dickow Pumpen Kg Double split case and method for monitoring a double split case
DE102012019423B3 (en) * 2012-10-02 2013-12-05 Dickow-Pumpen Kg Double can
DE102019002797A1 (en) * 2019-04-17 2020-10-22 KSB SE & Co. KGaA Containment shell
WO2020212250A1 (en) 2019-04-17 2020-10-22 KSB SE & Co. KGaA Split can
US12142986B2 (en) 2019-04-17 2024-11-12 KSB SE & Co. KGaA Split can
CN117646727A (en) * 2024-01-29 2024-03-05 烟台恒邦泵业有限公司 Vertical multistage magnetic drive pump
CN117646727B (en) * 2024-01-29 2024-04-16 烟台恒邦泵业有限公司 Vertical multistage magnetic drive pump

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EP1777414B1 (en) 2019-05-22

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