EP0291780B1 - Pumpe mit Spaltrohrantrieb - Google Patents

Pumpe mit Spaltrohrantrieb Download PDF

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Publication number
EP0291780B1
EP0291780B1 EP88107267A EP88107267A EP0291780B1 EP 0291780 B1 EP0291780 B1 EP 0291780B1 EP 88107267 A EP88107267 A EP 88107267A EP 88107267 A EP88107267 A EP 88107267A EP 0291780 B1 EP0291780 B1 EP 0291780B1
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EP
European Patent Office
Prior art keywords
pump according
ceramic
propeller
pump
cover
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.)
Expired - Lifetime
Application number
EP88107267A
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English (en)
French (fr)
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EP0291780A1 (de
Inventor
Guy Delabre
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Comadur SA
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Comadur SA
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Publication of EP0291780A1 publication Critical patent/EP0291780A1/de
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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • 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
    • F04D13/027—Details of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/404—Transmission of power through magnetic drive coupling
    • F05B2260/4041—Transmission of power through magnetic drive coupling the driven magnets encircling the driver magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics
    • F05D2300/2112—Aluminium oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics
    • F05D2300/2118—Zirconium oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/226—Carbides
    • F05D2300/2261—Carbides of silicon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/228—Nitrides
    • F05D2300/2283—Nitrides of silicon

Definitions

  • the subject of the present invention is a magnetic drive pump which comprises a body comprising two parts assembled in a sealed manner, two openings for the inlet and outlet of a liquid to be pumped and connection means for enabling pipes to be connected at the locations of these openings; a rotary device mounted inside this body for sucking the liquid through one of the openings and discharging it through the other; at least one permanent motor magnet placed outside the body; a motor for driving this magnet in rotation about an axis; at least one permanent follower magnet linked to the rotary device for transmitting to the latter the rotational movement of the motor magnet; and fixing means for making the body integral with a fixed part of the engine.
  • the rotary device in which the rotary device can be a propeller, a disc with fins on one of its faces or a gear, are currently used in many fields such as chemistry, medicine, mechanics (for example for polishing with a liquid loaded with abrasive particles), heating and refrigeration or the food industry. They also have more specific applications such as, for example, the supply of fresh or sea water to an aquarium.
  • this drive acts as a clutch and avoids overloads which could damage the engine.
  • Magnetic drive pumps therefore have great advantages over direct drive pumps, but we can still make at least two complaints.
  • the first criticism is that very often the same pump can only be used to transport certain liquids and not others or only liquids up to a certain temperature and this mainly because of the materials that were used to make the body of this pump and the elements it contains. This is the case, for example, for certain pumps which are specially designed to transfer or circulate very corrosive liquids or abrasive liquids and which are not suitable for more harmless products such as food or pharmaceutical products. This is also the case for the pump which is described in document US-A-3 306 221 and whose body parts and the propeller are parts molded from a plastic material such as prolypropylene.
  • This pump can indeed be used to pump certain corrosive chemicals as well as food liquids but it is not made to pump very acidic products or abrasive liquids. In addition, this pump can only be used for liquids whose temperature hardly exceeds a hundred degrees.
  • a solution for manufacturing pumps with magnetic drive more universal than those which currently exist is for example in the document DE-A-3 413 930 which describes a centrifugal pump of this type while recommending to realize most of the elements which will be in contact with ceramic pumped liquid.
  • this pump is presented as being more particularly intended for very corrosive liquids such as acids or strongly alkaline products and whose temperature can go up to about 200 ° C.
  • ceramics can be used.
  • most of the ceramics which currently exist are materials which are practically inert to all chemical agents, which resist wear and corrosion well and which can withstand temperatures well above 200 ° C.
  • the object of the invention is to provide a magnetic drive pump which has both the advantage of being able to be used for pumping very diverse liquids, in a very wide range of temperatures, and that of not requiring any gasket. tightness and, therefore, practically no maintenance.
  • the ceramic or each of the ceramics in which these elements are made is formed mainly from one of the following compounds: alumina (Al203), zirconium oxide (ZrO2), silicon nitride (Si3N4) and silicon carbide (SiC), also due to the fact that the parts of the body of this pump have respective contact surfaces which are polished and the fact that these parts are tightly assembled simply by pressing these surfaces against each other.
  • document US-A-3,776,660 describes a pump in which the parts of the body which are in contact with the pumped liquid and the rotary device, more precisely the wheel, are or can be produced themselves. also in a ceramic formed by or containing alumina, silicon nitride or silicon carbide but this pump is a centrifugal pump whose impeller is mechanically driven and which therefore has the same disadvantages as conventional direct drive pumps including we talked before.
  • the liquid to be pumped is only in contact with ceramic parts and therefore so that this pump does not not not only allows a large number of liquids to be transferred, but almost all.
  • alumina ceramic which contains at least 96% by weight of alumina, especially if one calls upon the technique sintering because this operation is then easier only with ceramics with a lower alumina concentration and especially if the pump must convey products such as pharmaceutical liquids which must in no way lose their purity.
  • alumina ceramics can also be used. This is the case for example of red, green or blue ceramics which respectively contain chromium (Cr2O3), nickel (Ni2O3) and cobalt (Co3O4) oxides and black ceramics which contain several metallic oxides other than that of aluminum, in varying proportions.
  • the pump which has been chosen as an example to illustrate the invention and which can be seen in FIGS. 1 to 3 is a pump whose rotary device is a propeller 2, for example made of alumina ceramic, which the 'is also commonly called a turbine and which could have been produced by using one or the other of the two manufacturing techniques which we discussed above.
  • a propeller 2 for example made of alumina ceramic, which the 'is also commonly called a turbine and which could have been produced by using one or the other of the two manufacturing techniques which we discussed above.
  • this propeller 2 has a bell-shaped shaft 4 which has a hollow cylindrical part 6, surrounded at one of its ends by blades 8, and which is extended on the other side by a part full frustoconical 10 and two successive cylindrical parts 12 and 14, also full, of increasingly smaller diameter, the smallest of which 14 is intended to constitute a pivot for the propeller and the largest 12 a range for this pivot.
  • blades 8 are four in number, which is of course only a possibility, that they are both short, straight and fairly thick, their ends are rounded so as to form portions of the same circle centered on the axis of the shaft 4 and that they are oriented approximately tangentially with respect to another circle with the same center as the previous one, which means that the pump we are describing is not reversible.
  • the cylindrical part 6 has inside a recess 16 which serves as a housing for a permanent magnet also cylindrical 18, for example of ferrite or samarium-cobalt, whose l thickness is equal to the depth of this recess and which is fixed to the propeller by gluing.
  • a permanent magnet also cylindrical 18, for example of ferrite or samarium-cobalt, whose l thickness is equal to the depth of this recess and which is fixed to the propeller by gluing.
  • this cylindrical magnet 18 could very well be replaced by several small magnets in the form of rings and placed side by side.
  • the propeller 4 that we have just described is placed in a body 20 which includes a tank 22 externally cylindrical and fairly thick, which could also be produced made of alumina ceramic, preferably by the pressing and sintering method, and which has both a very flat and perfectly polished edge 24, a bottom 26 with inside a central blind hole 28, in which is engaged the pivot 14 of the propeller, and a wall 30 pierced with two frustoconical holes 32 and 34 which have a decreasing diameter when passing from the inside to the outside of the tank and a turn also perfectly polished and which constitute two openings respectively for the entry and exit of a liquid to be pumped.
  • a tank 22 externally cylindrical and fairly thick, which could also be produced made of alumina ceramic, preferably by the pressing and sintering method, and which has both a very flat and perfectly polished edge 24, a bottom 26 with inside a central blind hole 28, in which is engaged the pivot 14 of the propeller, and a wall 30 pierced with two frustoconical holes 32 and 34 which have
  • the wall 30 has an internal surface which is composed of a cylindrical part located on the edge side 24 and a slightly less frustoconical part which is located on the bottom side 26 and which corresponds to that 10 of the propeller shaft but it is quite clear that this surface could also be completely cylindrical.
  • openings 32 and 34 are located in the same diametral plane and opposite one another as in the figure.
  • the diameter of the cylindrical part of the internal surface of the wall is only very slightly greater than that of the circle circumscribed by the blades of the propeller and, on the other hand, that the outlet opening 34 is close enough to the edge 24 to be in front of these blades and that the opening 32 is more distant so as to open into the free space and sufficiently large that the propeller shaft leaves between it and the wall of the tank.
  • This inlet opening can be located, for example, approximately halfway up the tank.
  • the body 20 also includes a round cover 36, substantially the same diameter as the tank 22 and which closes the latter completely, simply by being pressed against its edge 24 by assembly means which will be described later.
  • This cover 36 which could have been manufactured using the same technique and preferably the same ceramic as for the tank, has the shape of an inverted cap with a wide and flat edge 38 whose thickness is about the same than that of the upper part of the wall of the tank and a cylindrical cap 40 much thinner than this edge 38, which serves as a hub for the propeller 2. It is in fact seen that the hollow cylindrical part 6 of the latter completely surrounds this cap.
  • the means which make it possible to connect pipes 42 and 44 to the pump consist of two identical and entirely removable devices 46 and 48.
  • connection devices consists of a tube 50, respectively 52, also made of ceramic, which has at one of its ends a collar 54, respectively 56, the surface of which has been polished and the frustoconical shape of which corresponds exactly to that of the opening 32, respectively 34, of the wall of the tank 22, in which this collar is engaged and of a mechanical system, placed outside the tank, to exert a substantially axial traction on this tube .
  • the first element is a plastic plate, for example round, 62, respectively 64, which has a notch 66 and which is placed around the tube, between its frustoconical collar 54, respectively 56, and another collar 68, respectively 70, for example cylindrical, which it has in its central part and whose diameter is obviously less than the minimum diameter of the opening 32, respectively 34, of the wall of the tank.
  • the other two elements are screws 72, respectively 74, also made of plastic, which pass through two tapped holes 76, respectively 78, of the plate, located on either side of the tube and whose truncated points come to bear against the wall 28 when the tube is in place.
  • connection devices when the connection devices are mounted, these screws must continue to be tightened after the plate has come up against the collars 68 and 70 to force the surfaces of the other collars 54 and 56 of the tubes to adhere perfectly to the towers holes 32 and 34. Otherwise, the body 2 of the pump would not be waterproof.
  • connection devices it should also be noted that the frustoconical collars 54 and 56 of the tubes are also provided so as not to exceed the internal surface of the tank. For the output device 48 this is a necessity.
  • these means comprise two circular metal flanges 80 and 82, of diameter greater than that of the body 20, which are placed at each end thereof and which are connected together by several bolts 84 which cross and which carry at their ends tightening nuts 86.
  • the means for assembling the tank and the cover are also those which make it possible to mount the body in front of a unidirectional electric motor. 94.
  • this part is simply shown in a part of a fixed element 96 of this motor, for example of a part of a casing or of a chassis, to which the flange 80 is fixed, by suitable means not visible which can be screws, and its output shaft 98 which is surrounded at its end by a permanent magnet cylindrical motor 100, substantially the same length as the follower magnet 18 carried by the propeller and which passes through a central hole 92 of this flange to penetrate inside the cap cylindrical 40 of the cover 36, the axis of this shaft 98 of course coinciding with that of the body 20.
  • the motor magnet 100 can, thanks to the relative thinness of the cap 40 of the cover, easily drive the follower magnet 18 of the propeller in the same direction.
  • the helic since, as already indicated, the helic has a certain play both radial and axial inside the body, as soon as the motor starts to rotate it positions itself automatically so that its axis of rotation coincides exactly with that of the shaft 98 and that the median planes, perpendicular to these axes, of the magnets do the same and if the pump is carried out correctly it is possible that there is no longer then no contact between the propeller and the body and that the latter turns by floating in the pumped liquid.
  • the pumped liquid can only be in contact with ceramic, which means that it can be practically any.
  • FIGS. 5 to 7 are also very close to the embodiment of FIGS. 1 to 3.
  • the cover 36 is no longer constituted by a disc of constant thickness and relatively small compared to that of the tank and the flange 80 in the recess 88 of which the cover is engaged has instead become more thick so that the shaft 98 of the motor 94 which has become much shorter and much larger does not leave the central hole 92 that this flange continues to have and that the end of this shaft is on the contrary at a certain distance of the cover.
  • the shaft 98 must be able to carry at its end a motor magnet in the form of a disc which continues to bear the mark 100 and which is glued inside a recess 104 in which it is only partially housed.
  • cylindrical part 6 of the propeller is no longer hollow and that this propeller also has, on its face opposite the cover, a central recess 106 in which is stuck a permanent follower magnet also in the form of a disc, of diameter substantially equal to that of the motor magnet 100 and which is always designated by the reference 18.
  • this face of the propeller opposite the cover has, on the contrary, several small recesses 108, for example six (see FIG. 7), distributed regularly in a circle centered on the axis of this propeller and in which small follower magnets 18 are housed and as many small motor magnets 100 as the motor shaft 98 carries at its end.
  • Another possibility would be to remove the flanges, to make the tank with a flange around its opening, to provide holes in this flange and in the cover, to assemble the latter and the tank by bolts and nuts and to use these same bolts and other nuts or to use other means to mount the body to the front of the engine.
  • connection devices 46 and 48 could also replace the connection devices 46 and 48 with simple external nozzles made in one piece with the tank or design the pump differently so that the motor magnet is around the follower magnet, like this is already done in some existing magnetic drive pumps, or modify the shape of the propeller to make the pump reversible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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Claims (16)

  1. Magnetisch angetriebene Pumpe, umfassend einen Korpus (20) mit zwei jeweils aus Keramik gefertigten und abdichtend miteinander verbudenen Teilen (22, 36), mit zwei Öffnungen (32, 34) für den Einlaß und den Auslaß einer zu pumpenden Flüssigkeit, und mit Verbindungsmitteln (46, 48) zum Ermöglichen des Anschließens von Leitungen (42, 44) an den Stellen dieser Öffnungen, ein ebenfalls aus Keramik bestehendes im Innern des Korpus angeordnetes umlaufendes Organ (2) zum Ansaugen der Flüssigkeit durch eine der Öffnungen und zum Fördern der Flüssigkeit durch die andere, mindestens einen Antriebs-Permanentmagneten (100), der außerhalb des Korpus plaziert ist, einen Motor (94) zum Antreiben des Antriebs-Magneten zum Umlauf um eine Achse, mindestens einen Abtriebs-Permanentmagneten (18), der mit dem umlaufenden Organ verbunden ist, um auf dieses die Drehbewegung des Antriebsmagneten zu übertragen, und Befestigungsmittel (80, 86) zum Verbinden des Korpus mit einem stationären Teil (96) des Motors, dadurch gekennzeichnet, daß die Keramik oder jede der Keramiken, aus der oder aus denen die miteinander verbundenen Teile (22, 36) des Korpus und das umlaufende Organ (2) hergestellt sind, hauptsächlich aus einer der folgenden Komponenten besteht: Aluminiumoxid (Al₂O₃), Zirkonoxid (ZrO₂), Siliziumnitrid (Si₃N₄) und Siliziumkarbid (SiC), daß die Korpusteile jeweilige Kontaktoberflächen aufweisen, die poliert sind, und daß diese Teile derart abdichtend miteinander verbunden sind, daß einfach diese Oberflächen gegeneinander gepreßt werden.
  2. Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Teile (22, 36) des Korpus (20) und das umlaufende Organ (2) sämtlich aus einer Keramik auf Aluminiumoxidbasis gefertigt sind.
  3. Pumpe nach Anspruch 2, dadurch gekennzeichnet, daß die Keramik mindestens 96 Gewichts-% Aluminiumoxid enthält.
  4. Pumpe nach Anspruch 2, dadurch gekennzeichnet, daß die Keramik außerdem ein anderes Metalloxid enthält.
  5. Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Keramik gleichermaßen mehrere andere Metalloxide enthält.
  6. Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß das umlaufende Organ eine Schraube (2) ist, die eine Welle (4), mit der der Abtriebsmagnet (18) verbunden ist, und mehrere um diese Welle herum angeordnete Flügel (8) umfaßt.
  7. Pumpe nach Anspruch 6, dadurch gekennzeichnet, daß die beiden miteinander verbundenen Teile des Korpus (20) von einem Gehäuse (22) mit einem Boden (26), einer Wandung (22) und einem Rand (24) bzw. einem Dekkel (36), der das Gehäuse abschließt, indem er nur gegen dessen Rand gepreßt wird, gebildet sind.
  8. Pumpe nach Anspruch 7, dadurch gekennzeichnet, daß das Gehäuse (22) und der Deckel (36) mittels zweier Flansche (80, 82) verbunden sind, die an dem Deckel bzw. an dem Gehäuseboden anliegen und die miteinander durch Bolzen (84) und Spannmuttern (86) verbunden sind, die um den Korpus herum angeordnet sind.
  9. Pumpe nach Anspruch 8, dadurch gekennzeichnet, daß die Flansche (80, 82) zwei zugeordnete Ausnehmungen (88, 90) aufweisen, in denen der Deckel (36) und der Boden (26) des Gehäuses (22) sitzen, um das Positionieren des Deckels und des Gehäuses zueinander zu ermöglichen.
  10. Pumpe nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß einer (80) der Flansche (80, 82) an dem stationären Teil (96) des Motors (94) befestigt ist, damit diese Flansche zugleich die Befestigungsmittel mit den sie verbindenden Bolzen (84) und Muttern (86) bilden.
  11. Pumpe nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, daß der Boden (26) des Gehäuses (22) im Innern ein zentrales Sackloch (28) aufweist, in den ein Zapfen (14) eingefügt ist, welchen die Welle (4) der Schraube (2) an einem ihrer Enden aufweist, und daß die Flügel (8) dieser Schraube sich am anderen Ende dieser Welle befinden.
  12. Pumpe nach Anspruch 11, dadurch gekennzeichnet, daß die Welle (4) der Schraube (2) gegenüber dem Zapfen (14) eine hohlzylindrische Partie (6) mit einer Innenausnehmung (16) aufweist, in der der ebenfalls zylindrische Abtriebsmagnet (18) sitzt, daß der Deckel ebenfalls in seinem Zentrum eine hohlzylindrische Partie (40) aufweist, die in das Innere derjenigen der Schraubenwelle ragt, um als Nabe der letzteren zu dienen, und daß der ebenfalls zylindrische Antriebsmagnet (100) koaxial im Innern dieser hohlen Partie des Deckels plaziert ist.
  13. Pumpe nach Anspruch 12, dadurch gekennzeichnet, daß der Abtriebsmagnet (18) vollständig von einem Rohr (102) abgedeckt ist, gefertigt ebenfalls aus einer Keramik auf der Basis von Aluminiumoxid, Zirkonoxid, Siliziumnitrid oder Siliziumkarbid.
  14. Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnungen (32, 34) des Korpus (20) von jeweils in das Innere desselben orientierten Anlageflächen umgeben sind und daß die Verbindungsmittel für jede der Leitungen eine ebenfalls aus einer Keramik auf Basis von Aluminiumoxid, Zirkonoxid, Siliziumnitrid oder Siliziumkarbid gefertigte Röhre (50, bzw. 52), die an einem ihrer Enden eine zum Äußeren des Korpus orientierte Anlagefläche komplementär zu derjenigen der Öffnung, in die dieses Ende eingefügt ist, aufweist, und ein außerhalb des Korpus plaziertes mechanisches System (62, 72 bzw. 64, 74) zum Ausüben einer im wesentlichen axial gerichteten Zugkraft auf die Röhre und Halten ihrer Anlagefläche angedrückt an diejenige der Öffnung umfassen.
  15. Pumpe nach Anspruch 14, dadurch gekennzeichnet, daß die die Öffnungen (32, 34) des Korpus (20) umgebenden Anlageflächen und die Anlageflächen der Röhren (50, 52) kegelstumpfförmig sind.
  16. Pumpe nach Anspruch 14 oder 15, dadurch gekennzeichnet, daß das mechanische System ein Kunststoffplättchen (62, bzw. 64), das beweglich um die Röhre (50, bzw. 52), der das System zugeordnet ist, herum angeordnet ist und von zwei beidseits dieser Röhre angeordneten Gewindelöchern (76, bzw. 78) durchsetzt ist, und zwei ebenfalls aus Kunststoff bestehende Schrauben (72, bzw. 74) umfaßt, die die Löcher des Plättchens durchsetzen und, indem sie sich mit ihrem Ende am Korpus (20) abstützen, das Plättchen zwingen, sich gegen einen Kragen (68, bzw. 70) anzupressen, den die Röhre ebenfalls aufweist.
EP88107267A 1987-05-12 1988-05-06 Pumpe mit Spaltrohrantrieb Expired - Lifetime EP0291780B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706702 1987-05-12
FR8706702A FR2615252A1 (fr) 1987-05-12 1987-05-12 Pompe a entrainement magnetique

Publications (2)

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EP0291780A1 EP0291780A1 (de) 1988-11-23
EP0291780B1 true EP0291780B1 (de) 1991-10-23

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EP (1) EP0291780B1 (de)
DE (1) DE3865730D1 (de)
FR (1) FR2615252A1 (de)

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FR2715442B1 (fr) * 1994-01-26 1996-03-01 Lorraine Carbone Pompe centrifuge à entraînement magnétique.
EP0779699B1 (de) * 1995-12-12 1999-03-03 KSB Aktiengesellschaft Magnetkupplung für eine Kreiselpumpe
US6158984A (en) * 1998-12-28 2000-12-12 Kriton Medical, Inc. Rotary blood pump with ceramic members
WO2020100690A1 (ja) * 2018-11-13 2020-05-22 パナソニックＩｐマネジメント株式会社 電動ポンプ

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EP0291780A1 (de) 1988-11-23
FR2615252A1 (fr) 1988-11-18
DE3865730D1 (de) 1991-11-28

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