EP2072827A1 - Canned motor pump - Google Patents

Canned motor pump Download PDF

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Publication number
EP2072827A1
EP2072827A1 EP20070024384 EP07024384A EP2072827A1 EP 2072827 A1 EP2072827 A1 EP 2072827A1 EP 20070024384 EP20070024384 EP 20070024384 EP 07024384 A EP07024384 A EP 07024384A EP 2072827 A1 EP2072827 A1 EP 2072827A1
Authority
EP
European Patent Office
Prior art keywords
housing
pump
motor
pump housing
centrifugal pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20070024384
Other languages
German (de)
French (fr)
Other versions
EP2072827B1 (en
Inventor
Finn Mathiesen Høj
Oluf Kjaer
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.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
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 Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP07024384.5A priority Critical patent/EP2072827B1/en
Publication of EP2072827A1 publication Critical patent/EP2072827A1/en
Application granted granted Critical
Publication of EP2072827B1 publication Critical patent/EP2072827B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0626—Details of the can
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps

Definitions

  • the invention relates to a centrifugal pump unit with the features specified in the preamble of claim 1.
  • Centrifugal pump units of this type in which the rotor is separated from the stator by a split tube, are widely used, for example as heating circulation pumps, as circulation pumps and the like.
  • the can it is state of the art to form the can as a canned pot, passing through the motor housing.
  • the pot bottom is either formed integrally with the split tube or formed as a separate component, for example as a sealing plug, which is typically accessible from the outside of the motor, so that removed even in the assembled state of the pump, the plug and solved, for example, a locked rotor by manual intervention can be.
  • the gap tube is formed flange. The attachment is typically between the motor and pump housing including this flange.
  • the motor housing is fastened with screws on the pump housing, so that the flange of the split tube and possibly provided seals between them are firmly and tightly clamped.
  • a centrifugal pump unit is offered for example by the applicant under the type designation "Grundfos UP Series 100". This is an in-line pump, in which the motor housing, split tube and pump housing are connected together in the manner described above.
  • the invention has the object, a generic centrifugal pump unit in such a way that the aforementioned disadvantages are avoided, in particular the engine, the engine electronics or at least part of the engine can be easily and easily replaced.
  • the centrifugal pump assembly has a pump housing accommodating a pump impeller and a motor housing accommodating a stator. It also has a can, in which a drive connected to the pump impeller rotor is arranged, wherein according to the invention, the can is fixed independently of the motor housing on the pump housing.
  • the basic idea of the present invention is thus to fasten the split tube itself to the pump housing, in order in this way to use the liquid-conducting part of the pump set as a kind of assembly line. and construct assembly, wherein the other mounting unit or the other mounting units, which may typically include the stator, but also the other engine electronics, in particular frequency converters, terminals, switches, displays and the like, are to combine to form a further assembly unit, which is independent of the other assembly and assembly is manageable, so that in repair or maintenance, the latter mounting unit can be removed without the risk of liquid leakage and without any need to take any precautions on the pump side.
  • the other mounting unit or the other mounting units which may typically include the stator, but also the other engine electronics, in particular frequency converters, terminals, switches, displays and the like, are to combine to form a further assembly unit, which is independent of the other assembly and assembly is manageable, so that in repair or maintenance, the latter mounting unit can be removed without the risk of liquid leakage and without any need to take any precautions on the pump side.
  • the liquid-carrying part of the unit from the electrical part is independently handled. It is under canned in the context of the present invention, not only the crevice in the true sense, ie the pipe section between the rotor and stator to understand, but the entire, the actual canned part comprehensive, ie the canned pot including the wall, which the pump housing to the engine out covers.
  • the can has a flange, with which it connects to the motor-facing side of the pump housing and with which it is preferably screw-mounted on the pump housing.
  • This flange provided on the gap tube serves for fastening the gap tube to the pump housing and forms the wall of the pump housing facing the motor housing.
  • This flange is sealingly connected to the pump housing, so that at the end closed gap tube, be it in the form of a canned pot or in the form of an end closure plug, this canned flange with the stator and possibly arranged in the motor housing motor electronics with respect to the pumped liquid of the pump shields. Since the flange attached to the pump housing, typically screw-mounted, can The motor housing must be removed from the pump housing without having to open the pump housing.
  • the split tube may be made of metal or plastic, is advantageously made as a deep-drawn part of sheet metal, wherein the flange may be formed integrally with the gap tube.
  • the radial extent of the flange manufacturing technology it may be advantageous according to a development of the invention, canned tube and flange of two moldings, preferably to produce from correspondingly shaped sheets. These sheets are circumferentially and tightly connected to each other, for example, by a circumferential weld, by gluing, rolling or the like.
  • the moldings may be connected to each other butting or overlapping. It when each of the mold parts has a parallel to the cylindrical portion of the can and arranged circumferential portion and these circumferential portions of the mold parts abut each other, preferably there are circumferentially welded together and form a stiffening rib is particularly advantageous. On the one hand, the welding in the region of this rib is particularly easy to manufacture, and on the other hand, the rib forms a stiffening component of the flange, so that it can be made more thin-walled.
  • the split tube at its end facing away from the impeller has a receptacle for a closure body, said receptacle is preferably circumferentially welded to the can.
  • Such closure body at the motor end of the split tube are used to vent the can or can solve a blocked rotor by manual intervention.
  • the sealing plug provided in this area must be reliably tight, which is why it is advantageous, here a separate receiving component to provide, which has a sealing surface for sealing plug and which can, for example, receive a thread to enter into a positive connection with the sealing plug.
  • the gap tube should be formed as thin as possible, it is expedient to form such a receptacle as a separate component and then connect to the motor-side end of the can, for example by a circumferential weld.
  • the motor housing with the stator located thereon is detachably fastened to the unit formed from the can and pump housing so that it can be removed or replaced axially in the direction of the can after release of the attachment.
  • the engine electronics or at least a part of the engine electronics can advantageously be arranged surrounding the gap tube between the stator and the pump housing.
  • the engine electronics can be arranged in the motor housing or in a separate, connectable to the pump housing electronics housing.
  • This arrangement is particularly advantageous, since this results in an extremely compact design of the unit and can be completely dispensed with the otherwise usual arrangement in the end face or circumferentially arranged on the motor housing terminal box.
  • the power connections can then advantageously be led out parallel to the impeller axis on the outside of the motor housing.
  • This arrangement of the engine electronics also allows optional cooling via the pump or the motor housing or by free convection.
  • fastening means are provided on the gap tube, which define the motor housing on the pump housing.
  • This attachment is suitable for the invention Centrifugal pump unit in a special way, since the motor housing is independent of the can from the pump housing solvable.
  • the fastening can be carried out particularly advantageously via a circumferential groove provided near the motor-side end of the split tube, into which engages at least one latching lug of an end-side plate which is arranged and configured such that it clamps the motor housing between plate and pump housing.
  • This has the further advantage that for removal of the motor housing from the pump housing only this typically at the free end of the engine easily accessible plate must be removed to the motor housing, so the stator and possibly arranged between the stator and the pump housing engine electronics can be removed.
  • This plate is advantageously designed as a rating plate of the unit or carries this.
  • an anti-rotation lock is provided between the pump housing and the motor housing, which is preferably formed by positive-locking means between the motor housing and the pump housing.
  • This rotation can be formed for example by arranged on the flange of the gap tube, the motor housing facing out dowel pins, which engage in corresponding fitting recesses of the motor housing.
  • the centrifugal pump unit as in particular in the FIGS. 1 and 3 is shown, has a motor housing 1 and a pump housing 2.
  • the motor housing 1 includes the stator and the engine electronics, which is arranged in the housing part 3 between the stator and the pump housing 2.
  • Centrally interspersed is the motor housing 1 of a split tube 4, which has a in Fig. 2 shown rotor 5, whose pump-side end carries an impeller 6, which is rotatably mounted in the pump housing 2 and centrally aspirates liquid from an inlet port 7 via a suction port of the impeller 6 and then radially via a formed within the pump housing 2 screw to an outlet 8 promotes.
  • the can 4 has a cylindrical, the actual can forming the region in which the magnetically active part of the rotor 5 is arranged.
  • it is a permanent magnet motor, the permanent magnets are arranged in the rotor 5 and cooperate in a conventional manner with the stator side arranged motor windings, which are arranged in the motor housing 1 outside the gap tube 4 surrounding the rotor 5.
  • a flange 9 connects to the pump housing side end, which is formed integrally with the can 4 and extends transversely to the gap tube axis to near the lateral end of the pump housing 2, like this in Fig. 2 is visible.
  • the flange 9, which is also stepped, forms with its central part a wall 10 of the pump housing 2.
  • the flange is designed as a fastening flange 12. He has for this purpose four recesses 11 which are aligned with corresponding, threaded recesses in the motor-facing side of the pump housing 2. Through the recesses 11 screws 13 are guided, with which the mounting flange 12 is fixed by incorporation of a seal (not shown) on the pump housing 2.
  • pins 14 are provided on the side facing the motor housing 1 next to the recesses, which engage in corresponding recesses in the pump housing 2 facing end face of the motor housing 1.
  • the pins 14 are fixedly connected to the flange 9.
  • the split tube 4 is, in particular the Figures 2 and 3 show, with inclusion of the rotor 5, which is rotatably supported by means of two bearings 15 and 16 within the gap tube 4, and the impeller 6 screwed to the pump housing 2, so that the basis of Fig. 2 shown assembly and assembly consisting of pump housing 2, canned 4 with flange 9 and rotor 5, impeller 6 and bearings 15, 16 is formed.
  • This construction and assembly unit according to Fig. 2 Can be handled independently of the motor housing 1 and carries all fluid-carrying parts of the pump set.
  • the gap tube 4 is closed by means of a sealing plug 17.
  • a sealing plug 17 For receiving this sealing plug 17, which is provided with an external thread and a seal, an annular receptacle 18 is arranged at the motor end of the can 4, which is firmly and tightly connected by a peripheral weld 19 with the can 4.
  • the receptacle 18 is formed by a metal ring whose outer circumference corresponds to that of the split tube 4, whose inner circumference is smaller, so that there may be provided an internal thread for receiving the sealing plug 17 and a sealing seat.
  • a circumferential groove 20 is provided on the outer circumference of the receptacle 18, which is provided for fastening the motor housing 1 on the can 4 or on the associated pump housing 2.
  • the motor housing 1 Fixed in the axial direction of the can 4, the motor housing 1 by means of an end plate 21, which has a directed into the motor housing 1, interrupted ring portion 22 which carries an inwardly directed, also interrupted in the circumferential direction locking lug, the form-fitting integration of the motor housing 1 in the groove 20 of the receptacle 18 of the can 4 engages and thus determines the motor housing 1 in the axial direction of the pump housing 2.
  • the plate 21 carries the nameplate of the pump unit.
  • the central opening formed by the annular portion 22 is penetrated by the free end of the receptacle 18 with the sealing plug 17, so that the latter is freely accessible from this end face of the motor housing 1.
  • FIG. 1 illustrated fully assembled centrifugal pump unit.
  • the plate 21 To release the motor housing, only the plate 21 has to be removed, after which the motor housing 1 can be pulled off from the pump housing 2 or from the can 4, as shown in FIG Fig. 3 is shown.
  • the motor housing 1 can be pulled off from the pump housing 2 or from the can 4, as shown in FIG Fig. 3 is shown.
  • all electrical and electronic parts can thus be easily separated from the fluid-carrying parts of the pump in order to replace, repair or replace them if necessary in the event of a defect.
  • the rotor 5 which forms part of the engine, but within the fluid-carrying assembly according to Fig. 2 is arranged.
  • the entire frequency converter electronics in the housing part 3 is arranged. Since the motor housing part accommodating the stator is designed to spring back relative to the housing part 3, a display 23, a switch for speed selection 24 and a power plug 25 can be arranged in this area, the electrical connections of which extend directly into the housing part 3 lying behind.
  • Fig. 4 that in the basis of the Figures 2 and 3 illustrated can 4 is in Fig. 4 shown in detail. It consists of the actual gap tube 4, which is formed expanded stepped to the flange 9 and there forms a receptacle for the bearing 16, whereas the bearing 15 is arranged in the cylindrical portion of the can 4, which passes through the stator.
  • the gap 4 is adjoined on one side by the flange 9, which is essentially formed by the wall 10 and the fastening flange 12.
  • Fig. 4a and c illustrate, the flange 9 is formed in the region of the wall 10 U-shaped and additionally retracted to the engine, wherein the actual wall 10 of the pump is formed by the web of the U-shaped cross section.
  • the mounting flange 12 connects radially to the leg of the U and is formed flat.
  • the inner leg of the U-profile with the adjoining web region is designed to match the end region of the can 4 which comes into abutment there, which are welded circumferentially to one another in this region.
  • the receptacle 18 connects, which is also welded circumferentially and receives the plug 17.
  • the pins 14 are fixedly connected to the mounting flange 12, for example by riveting or welding.
  • Fig. 5 shows an alternative embodiment of the split tube, which differs from the basis of Fig. 4 above characterized differs in that between the actual gap 4 forming the component and the flange 9, a stiffening annular bead 26 is provided, which integrally formed on the one hand on the gap tube 4 forming member 26a and on the other hand on the inside of the wall 10 forming member 26a is.
  • the parts 26a and 26b are welded together adjacent to each other, so that here also results in a one-piece component.
  • annular bead 26 a significant stiffening particular of the flange 9 and the weld, which connects the components in the region of the annular bead 26, laid out of the wall portion 10 to the outside, which is particularly favorable manufacturing technology in terms of avoiding possible distortion and accessibility during welding ,
  • the above based on the FIGS. 4 and 5 formed from the can 4 and flange 9 and the receptacle 18 integral components can, as far as the can 4 and the flange 9 is concerned, each formed from sheet metal parts, typically made of stainless steel, but also be made of plastic. In this case either diffusion-proof plastic or metal-coated, preferably coated by vapor deposition plastic into consideration. Also other manufacturing techniques can be used. For example, in the region of the annular bead 26, a connection can be produced by rolling or other forming techniques.
  • FIGS. 6 and 7 Based on FIGS. 6 and 7 is shown how a made of plastic can 4 may be formed.
  • the storage of the rotor within the can is deviating from the above.
  • the two radial bearings 15 and 16 are not arranged there as in the above-described embodiments near the ends of the rotor, but in the central region of the rotor, ie between the effective for the engine magnetic part of the rotor 5 and the impeller 7, which has the advantage that the gap region between the motor Jeem part of the rotor 5 and the can 4 may be formed exclusively with regard to the highest possible power transmission between the stator and rotor and the storage in the at according to the execution 6 and 7 widened area next to it can, as from Fig. 6 is apparent.
  • the can 4 is provided with star-shaped stiffening ribs 27 on the outer side, which extend substantially radially and extend between the flange 9 supporting the wall 10 to approximately the central annular cross-section which extends into the actual can 4. Also, recesses 28 are provided in the flange 9 to avoid material accumulation within the casting. That on the basis of FIGS. 6 and 7 formed example of plastic canned can also be made of other materials such as metal.

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

Abstract

The unit has a pump housing (2) accommodating a pump rotor wheel (6), and a motor housing accommodating a stator. A rotor (5) is arranged in a can (4), and is connected with the pump rotor wheel in a driven manner. The can is attached to the pump housing independent of the motor housing, and is provided with a flange (9). The can is made of two molded parts, which are formed from a sheet. The molded parts comprise sections, which run and are arranged parallel to a cylindrical part of the can. The can is provided with a support for a locking body.

Description

Die Erfindung betrifft ein Kreiselpumpenaggregat mit den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen.The invention relates to a centrifugal pump unit with the features specified in the preamble of claim 1.

Kreiselpumpenaggregate dieser Art, bei welchen der Rotor durch ein Spaltrohr vom Stator getrennt ist, werden zahlreich eingesetzt, beispielsweise als Heizungsumwälzpumpen, als Zirkulationspumpen und dergleichen. Bei derartigen Pumpen zählt es zum Stand der Technik, das Spaltrohr als Spaltrohrtopf, das Motorgehäuse durchsetzend, auszubilden. Der Topfboden ist dabei entweder einstückig mit dem Spaltrohr ausgeformt oder als gesondertes Bauteil, beispielsweise als Verschlussstopfen gebildet, der typischerweise von der Außenseite des Motors zugänglich ist, so dass auch in montiertem Zustand der Pumpe der Stopfen entfernt und beispielsweise ein blockierter Rotor durch manuellen Eingriff gelöst werden kann. Zur Pumpe hin ist das Spaltrohr flanschartig ausgebildet. Die Befestigung erfolgt typischerweise zwischen Motor und Pumpengehäuse unter Einschluss dieses Flansches. Dabei wird das Motorgehäuse mit Schrauben am Pumpengehäuse befestigt, so dass der Flansch des Spaltrohres und ggf. vorgesehene Dichtungen dazwischen fest und dicht eingespannt werden. Ein solches Kreiselpumpenaggregat wird beispielsweise von der Anmelderin unter der Typenbezeichnung "Grundfos UP-Serie 100" angeboten. Es handelt sich hierbei um eine Inline-Pumpe, bei welcher Motorgehäuse, Spaltrohr und Pumpengehäuse in der vorbeschriebenen Weise miteinander verbunden sind.Centrifugal pump units of this type, in which the rotor is separated from the stator by a split tube, are widely used, for example as heating circulation pumps, as circulation pumps and the like. In such pumps, it is state of the art to form the can as a canned pot, passing through the motor housing. The pot bottom is either formed integrally with the split tube or formed as a separate component, for example as a sealing plug, which is typically accessible from the outside of the motor, so that removed even in the assembled state of the pump, the plug and solved, for example, a locked rotor by manual intervention can be. Towards the pump, the gap tube is formed flange. The attachment is typically between the motor and pump housing including this flange. The motor housing is fastened with screws on the pump housing, so that the flange of the split tube and possibly provided seals between them are firmly and tightly clamped. Such a centrifugal pump unit is offered for example by the applicant under the type designation "Grundfos UP Series 100". This is an in-line pump, in which the motor housing, split tube and pump housing are connected together in the manner described above.

Diese Bauart hat sich bestens bewährt. Wenn allerdings am Motor oder an der Motorelektronik ein Defekt auftritt, so ist der gesamte Motorkopf bis hin zum Pumpenlaufrad auszutauschen, wobei selbst dann, wenn die Pumpe unter Eingliederung von Absperrhähnen eingebaut ist, trotz Verschluss derselben beim Ausbau ein gewisser Flüssigkeitsaustritt nicht zu vermeiden ist. Ein solcher Flüssigkeitsaustritt ist jedoch insbesondere bei modernen Pumpen, welche häufig weitaus komplexere Motorelektronik als das vorgenannte Modell aufweisen, unerwünscht. In jedem Falle ist ein solcher Aus-/Einbau vergleichsweise aufwändig und teuer und kann zu Komplikationen führen.This design has proven itself very well. However, if a defect occurs on the engine or on the engine electronics, then the entire engine head is replaced up to the pump impeller, even if the pump is installed incorporating stopcocks, despite closure of the same when removing a certain liquid leakage is unavoidable. However, such liquid leakage is undesirable, especially in modern pumps, which often have far more complex engine electronics than the aforementioned model. In any case, such removal / installation is relatively complex and expensive and can lead to complications.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, ein gattungsgemäßes Kreiselpumpenaggregat so auszubilden, dass die vorgenannten Nachteile vermieden werden, insbesondere der Motor, die Motorelektronik oder zumindest ein Teil des Motors einfach und unkompliziert ausgetauscht werden kann.Against this background, the invention has the object, a generic centrifugal pump unit in such a way that the aforementioned disadvantages are avoided, in particular the engine, the engine electronics or at least part of the engine can be easily and easily replaced.

Diese Aufgabe wird gemäß der Erfindung durch die in Anspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen, der nachfolgenden Beschreibung und der Zeichnung.This object is achieved according to the invention by the features specified in claim 1. Advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the drawings.

Das erfindungsgemäße Kreiselpumpenaggregat weist ein ein Pumpenlaufrad aufnehmendes Pumpengehäuse auf sowie ein einen Stator aufnehmendes Motorgehäuse. Es weist weiterhin ein Spaltrohr auf, in dem ein mit dem Pumpenlaufrad antriebsverbundener Rotor angeordnet ist, wobei gemäß der Erfindung das Spaltrohr unabhängig vom Motorgehäuse am Pumpengehäuse befestigt ist.The centrifugal pump assembly according to the invention has a pump housing accommodating a pump impeller and a motor housing accommodating a stator. It also has a can, in which a drive connected to the pump impeller rotor is arranged, wherein according to the invention, the can is fixed independently of the motor housing on the pump housing.

Grundgedanke der vorliegenden Erfindung ist es somit, das Spaltrohr selbst am Pumpengehäuse zu befestigen, um auf diese Weise den flüssigkeitsführenden Teil des Pumpenaggregats quasi als eine Montage- und Baueinheit auszubilden, wobei die andere Montageeinheit oder die anderen Montageeinheiten, welche typischerweise den Stator, aber auch die weitere Motorelektronik, insbesondere Frequenzumrichter, Anschlüsse, Schalter, Anzeigen und dergleichen umfassen kann/können, zu einer weiteren Montageeinheit zusammenzufassen sind, die unabhängig von der anderen Montage- und Baueinheit handhabbar ist, so dass im Reparatur- oder Wartungsfall letztere Montageeinheit entfernt werden kann ohne die Gefahr eines Flüssigkeitsaustritts besteht und ohne dass pumpenseitig irgendwelche Vorkehrungen zu treffen sind.The basic idea of the present invention is thus to fasten the split tube itself to the pump housing, in order in this way to use the liquid-conducting part of the pump set as a kind of assembly line. and construct assembly, wherein the other mounting unit or the other mounting units, which may typically include the stator, but also the other engine electronics, in particular frequency converters, terminals, switches, displays and the like, are to combine to form a further assembly unit, which is independent of the other assembly and assembly is manageable, so that in repair or maintenance, the latter mounting unit can be removed without the risk of liquid leakage and without any need to take any precautions on the pump side.

Dadurch, dass das Spaltrohr unabhängig vom Pumpengehäuse am Motorgehäuse befestigt ist, ist der flüssigkeitsführende Teil des Aggregats vom elektrischen Teil unabhängig handhabbar. Dabei ist unter Spaltrohr im Sinne der vorliegenden Erfindung nicht nur das Spaltrohr im eigentlichen Sinne, also der Rohrabschnitt zwischen Rotor und Stator zu verstehen, sondern das gesamte, das eigentliche Spaltrohr umfassende Bauteil, also den Spaltrohrtopf einschließlich der Wandung, welche das Pumpengehäuse zum Motor hin abdeckt.The fact that the can is fixed independently of the pump housing to the motor housing, the liquid-carrying part of the unit from the electrical part is independently handled. It is under canned in the context of the present invention, not only the crevice in the true sense, ie the pipe section between the rotor and stator to understand, but the entire, the actual canned part comprehensive, ie the canned pot including the wall, which the pump housing to the engine out covers.

Vorteilhaft weist das Spaltrohr einen Flansch auf, mit dem es an der zum Motor weisenden Seite des Pumpengehäuses anschließt und mit dem es am Pumpengehäuse vorzugsweise schraubbefestigt ist. Dieser am Spaltrohr vorgesehene Flansch dient zur Befestigung des Spaltrohrs am Pumpengehäuse und bildet die zum Motorgehäuse weisende Wandung des Pumpengehäuses. Dieser Flansch ist dichtend mit dem Pumpengehäuse verbunden, so dass bei endseitig verschlossenem Spaltrohr, sei es in Form eines Spaltrohrtopfes oder in Form eines endseitigen Verschlussstopfens, dieses Spaltrohr mit Flansch den Stator und die ggf. im Bereich des Motorgehäuses angeordnete Motorelektronik gegenüber der Förderflüssigkeit der Pumpe abschirmt. Da der Flansch am Pumpengehäuse befestigt, typischerweise schraubbefestigt ist, kann das Motorgehäuse vom Pumpengehäuse entfernt werden, ohne das Pumpengehäuse öffnen zu müssen.Advantageously, the can has a flange, with which it connects to the motor-facing side of the pump housing and with which it is preferably screw-mounted on the pump housing. This flange provided on the gap tube serves for fastening the gap tube to the pump housing and forms the wall of the pump housing facing the motor housing. This flange is sealingly connected to the pump housing, so that at the end closed gap tube, be it in the form of a canned pot or in the form of an end closure plug, this canned flange with the stator and possibly arranged in the motor housing motor electronics with respect to the pumped liquid of the pump shields. Since the flange attached to the pump housing, typically screw-mounted, can The motor housing must be removed from the pump housing without having to open the pump housing.

Das Spaltrohr kann aus Metall oder Kunststoff bestehen, ist vorteilhaft als Tiefziehteil aus Blech gefertigt, wobei der Flansch einstückig mit dem Spaltrohr ausgeformt sein kann. Um einerseits die axiale Erstreckung des Spaltrohres und andererseits die radiale Erstreckung des Flansches fertigungstechnisch nicht zu sehr zu limitieren, kann es gemäß einer Weiterbildung der Erfindung vorteilhaft sein, Spaltrohr und Flansch aus zwei Formteilen, vorzugsweise aus entsprechend geformten Blechen herzustellen. Diese Bleche werden umlaufend und dicht miteinander verbunden, beispielsweise durch eine umlaufende Schweißnaht, durch Kleben, Rollen oder dergleichen.The split tube may be made of metal or plastic, is advantageously made as a deep-drawn part of sheet metal, wherein the flange may be formed integrally with the gap tube. In order not to limit the axial extent of the split tube and on the other hand, the radial extent of the flange manufacturing technology not too much, it may be advantageous according to a development of the invention, canned tube and flange of two moldings, preferably to produce from correspondingly shaped sheets. These sheets are circumferentially and tightly connected to each other, for example, by a circumferential weld, by gluing, rolling or the like.

Die Formteile können aneinander stoßend oder überlappend verbunden sein. Besonders vorteilhaft ist es, wenn jedes der Formteile einen parallel zum zylindrischen Teil des Spaltrohrs angeordneten und umlaufenden Abschnitt aufweist und diese umlaufenden Abschnitte der Formteile aneinander anliegen, vorzugsweise dort umlaufend miteinander verschweißt sind und eine Versteifungsrippe bilden. Zum einen ist die Schweißung im Bereich dieser Rippe fertigungstechnisch besonders einfach, zum anderen bildet die Rippe ein Versteifungsbauteil des Flansches, so dass dieser dünnwandiger ausgestaltet werden kann.The moldings may be connected to each other butting or overlapping. It when each of the mold parts has a parallel to the cylindrical portion of the can and arranged circumferential portion and these circumferential portions of the mold parts abut each other, preferably there are circumferentially welded together and form a stiffening rib is particularly advantageous. On the one hand, the welding in the region of this rib is particularly easy to manufacture, and on the other hand, the rib forms a stiffening component of the flange, so that it can be made more thin-walled.

Gemäß einer vorteilhaften Weiterbildung der Erfindung weist das Spaltrohr an seinem vom Laufrad abgewandten Ende eine Aufnahme für einen Verschlusskörper auf, wobei diese Aufnahme vorzugsweise umlaufend mit dem Spaltrohr verschweißt ist. Derartige Verschlusskörper am motorseitigen Ende des Spaltrohrs dienen dazu, das Spaltrohr entlüften zu können oder einen blockierten Rotor durch manuellen Eingriff zu lösen. Der in diesem Bereich vorgesehene Verschlussstopfen muss zuverlässig dicht sein, weshalb es vorteilhaft ist, hier ein gesondertes Aufnahmebauteil vorzusehen, welches eine Dichtfläche zum Verschlussstopfen hin aufweist und das beispielsweise ein Gewinde aufnehmen kann, um mit dem Verschlussstopfen eine formschlüssige Verbindung einzugehen. Da das Spaltrohr möglichst dünnwandig ausgebildet sein sollte, ist es zweckmäßig, eine solche Aufnahme als gesondertes Bauteil auszubilden und dann mit dem motorseitigen Ende des Spaltrohres zu verbinden, beispielsweise durch eine umlaufende Schweißnaht.According to an advantageous embodiment of the invention, the split tube at its end facing away from the impeller has a receptacle for a closure body, said receptacle is preferably circumferentially welded to the can. Such closure body at the motor end of the split tube are used to vent the can or can solve a blocked rotor by manual intervention. The sealing plug provided in this area must be reliably tight, which is why it is advantageous, here a separate receiving component to provide, which has a sealing surface for sealing plug and which can, for example, receive a thread to enter into a positive connection with the sealing plug. Since the gap tube should be formed as thin as possible, it is expedient to form such a receptacle as a separate component and then connect to the motor-side end of the can, for example by a circumferential weld.

Vorteilhaft ist das Motorgehäuse mit dem daran befindlichen Stator lösbar an der aus Spaltrohr und Pumpengehäuse gebildeten Einheit befestigt, so dass dieses in Richtung des Spaltrohrs axial nach Lösen der Befestigung entfernt bzw. ausgetauscht werden kann.Advantageously, the motor housing with the stator located thereon is detachably fastened to the unit formed from the can and pump housing so that it can be removed or replaced axially in the direction of the can after release of the attachment.

Bei dem erfindungsgemäßen Kreiselpumpenaggregat kann die Motorelektronik oder zumindest ein Teil der Motorelektronik vorteilhaft zwischen dem Stator und dem Pumpengehäuse das Spaltrohr umgebend angeordnet sein. Dabei kann die Motorelektronik im Motorgehäuse oder in einem gesonderten, mit dem Pumpengehäuse verbindbaren Elektronikgehäuse angeordnet sein. Diese Anordnung ist besonders vorteilhaft, da sich dadurch eine äußerst kompakte Bauweise des Aggregats ergibt und auf die sonst übliche Anordnung in dem stirnseitig oder umfänglich am Motorgehäuse angeordneten Klemmenkasten vollständig verzichtet werden kann. Die Netzanschlüsse können dann vorteilhaft parallel zur Laufradachse an der Außenseite des Motorgehäuses herausgeführt sein. Diese Anordnung der Motorelektronik erlaubt darüber hinaus wahlweise die Kühlung über das Pumpen- oder über das Motorgehäuse bzw. durch freie Konvektion.In the centrifugal pump assembly according to the invention, the engine electronics or at least a part of the engine electronics can advantageously be arranged surrounding the gap tube between the stator and the pump housing. In this case, the engine electronics can be arranged in the motor housing or in a separate, connectable to the pump housing electronics housing. This arrangement is particularly advantageous, since this results in an extremely compact design of the unit and can be completely dispensed with the otherwise usual arrangement in the end face or circumferentially arranged on the motor housing terminal box. The power connections can then advantageously be led out parallel to the impeller axis on the outside of the motor housing. This arrangement of the engine electronics also allows optional cooling via the pump or the motor housing or by free convection.

Gemäß einer Weiterbildung der Erfindung sind am Spaltrohr Befestigungsmittel vorgesehen, welche das Motorgehäuse am Pumpengehäuse festlegen. Diese Befestigung eignet sich für das erfindungsgemäße Kreiselpumpenaggregat in besonderer Weise, da das Motorgehäuse unabhängig vom Spaltrohr vom Pumpengehäuse lösbar ist.According to one embodiment of the invention fastening means are provided on the gap tube, which define the motor housing on the pump housing. This attachment is suitable for the invention Centrifugal pump unit in a special way, since the motor housing is independent of the can from the pump housing solvable.

Dabei kann die Befestigung besonders vorteilhaft über eine nahe dem motorseitigen Ende des Spaltrohrs vorgesehene umlaufende Nut erfolgen, in welche mindestens eine Rastnase einer endseitigen Platte eingreift, die so angeordnet und ausgebildet ist, dass sie das Motorgehäuse zwischen Platte und Pumpengehäuse einspannt. Dies hat weiterhin den Vorteil, dass zum Entfernen des Motorgehäuses vom Pumpengehäuse lediglich diese typischerweise am freien Ende des Motors gut zugängliche Platte entfernt werden muss, um das Motorgehäuse, also den Stator und ggf. die zwischen Stator und Pumpengehäuse angeordnete Motorelektronik entfernt werden kann. Diese Platte ist vorteilhaft als Typenschild des Aggregats ausgebildet oder trägt dieses.In this case, the fastening can be carried out particularly advantageously via a circumferential groove provided near the motor-side end of the split tube, into which engages at least one latching lug of an end-side plate which is arranged and configured such that it clamps the motor housing between plate and pump housing. This has the further advantage that for removal of the motor housing from the pump housing only this typically at the free end of the engine easily accessible plate must be removed to the motor housing, so the stator and possibly arranged between the stator and the pump housing engine electronics can be removed. This plate is advantageously designed as a rating plate of the unit or carries this.

Um zu verhindern, dass das Motorgehäuse sich auf dem Spaltrohr dreht, ist gemäß einer Weiterbildung der Erfindung eine Verdrehsicherung zwischen Pumpengehäuse und Motorgehäuse vorgesehen, die vorzugsweise durch Formschlussmittel zwischen Motor- und Pumpengehäuse gebildet ist. Diese Verdrehsicherung kann beispielsweise durch auf dem Flansch des Spaltrohrs angeordnete, zum Motorgehäuse hin weisende Passstifte gebildet sein, welche in entsprechende Passausnehmungen des Motorgehäuses eingreifen.In order to prevent the motor housing from rotating on the split tube, according to one development of the invention, an anti-rotation lock is provided between the pump housing and the motor housing, which is preferably formed by positive-locking means between the motor housing and the pump housing. This rotation can be formed for example by arranged on the flange of the gap tube, the motor housing facing out dowel pins, which engage in corresponding fitting recesses of the motor housing.

Die Erfindung ist nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
ein Kreiselpumpenaggregat gemäß der Erfindung in Seitenansicht,
Fig. 2
in perspektivischer geschnittener Ansicht das Pumpengehäuse mit Rotor und Spaltrohr des Pumpenaggregats gemäß Fig. 1,
Fig. 3
das Kreiselpumpenaggregat gemäß Fig. 1 in perspektivischer Explosionsdarstellung,
Fig. 4
eine erste Ausführung eines Spaltrohrs,
a) in perspektivischer Schnittdarstellung,
b) in teilweise geschnittener Ansicht,
c) in Explosionsdarstellung der zu verbindenden Teile in Darstellung gemäß a) und
d) in Draufsicht auf das Spaltrohr,
Fig. 5
eine alternative Ausführung des Spaltrohrs, und zwar
a) in perspektivischer Schnittdarstellung,
b) in teilweise geschnittener Ansicht,
c) in Explosionsdarstellung der zu verbindenden Teile in Darstellung gemäß a) und
d) in Draufsicht auf das Spaltrohr,
Fig. 6
einen Längsschnitt durch eine andere Ausführung eines Spaltrohrs mit eingegliedertem Rotor und Pumpenlaufrad und,
Fig. 7
eine perspektivische Ansicht des Spaltrohrs gemäß Figur 6.
The invention is explained in more detail with reference to embodiments shown in the drawing. Show it:
Fig. 1
a centrifugal pump unit according to the invention in side view,
Fig. 2
in a perspective sectional view of the pump housing with rotor and the can of the pump set according to Fig. 1 .
Fig. 3
the centrifugal pump unit according to Fig. 1 in a perspective exploded view,
Fig. 4
a first embodiment of a split tube,
a) in a perspective sectional view,
b) in a partially sectioned view,
c) in an exploded view of the parts to be joined as shown in a) and
d) in plan view of the can,
Fig. 5
an alternative embodiment of the can, and that
a) in a perspective sectional view,
b) in a partially sectioned view,
c) in an exploded view of the parts to be joined as shown in a) and
d) in plan view of the can,
Fig. 6
a longitudinal section through another embodiment of a split tube with incorporated rotor and pump impeller and,
Fig. 7
a perspective view of the can according to FIG. 6 ,

Das Kreiselpumpenaggregat, wie es insbesondere in den Figuren 1 und 3 dargestellt ist, weist ein Motorgehäuse 1 und ein Pumpengehäuse 2 auf. Das Motorgehäuse 1 umfasst den Stator sowie die Motorelektronik, die in dem Gehäuseteil 3 zwischen Stator und Pumpengehäuse 2 angeordnet ist. Zentral durchsetzt ist das Motorgehäuse 1 von einem Spaltrohr 4, welches einen in Fig. 2 dargestellten Rotor 5 aufnimmt, dessen pumpenseitiges Ende ein Laufrad 6 trägt, welches im Pumpengehäuse 2 drehbar gelagert ist und bei Rotation Flüssigkeit von einem Einlassstutzen 7 über einen Saugmund des Laufrades 6 zentral ansaugt und dann radial über eine innerhalb des Pumpengehäuses 2 gebildete Schnecke zu einem Auslassstutzen 8 fördert.The centrifugal pump unit, as in particular in the FIGS. 1 and 3 is shown, has a motor housing 1 and a pump housing 2. The motor housing 1 includes the stator and the engine electronics, which is arranged in the housing part 3 between the stator and the pump housing 2. Centrally interspersed is the motor housing 1 of a split tube 4, which has a in Fig. 2 shown rotor 5, whose pump-side end carries an impeller 6, which is rotatably mounted in the pump housing 2 and centrally aspirates liquid from an inlet port 7 via a suction port of the impeller 6 and then radially via a formed within the pump housing 2 screw to an outlet 8 promotes.

Das Spaltrohr 4 weist einen zylindrischen, das eigentliche Spaltrohr bildenden Bereich auf, in welchem der magnetisch wirksame Teil des Rotors 5 angeordnet ist. Bei dem dargestellten Ausführungsbeispiel handelt es sich um einen Permanentmagnetmotor, dessen Permanentmagnete im Rotor 5 angeordnet sind und in an sich bekannter Weise mit den statorseitig angeordneten Motorwicklungen zusammenwirken, die im Motorgehäuse 1 außerhalb des Spaltrohrs 4 den Rotor 5 umgebend angeordnet sind.The can 4 has a cylindrical, the actual can forming the region in which the magnetically active part of the rotor 5 is arranged. In the illustrated embodiment, it is a permanent magnet motor, the permanent magnets are arranged in the rotor 5 and cooperate in a conventional manner with the stator side arranged motor windings, which are arranged in the motor housing 1 outside the gap tube 4 surrounding the rotor 5.

An den zylindrischen Teil des Spaltrohrs 4, der zum Pumpengehäuse 2 hin abgestuft ausgebildet ist, schließt sich am pumpengehäuseseitigen Ende ein Flansch 9 an, der einstückig mit dem Spaltrohr 4 ausgebildet ist und sich quer zur Spaltrohrachse bis nahe zum seitlichen Ende des Pumpengehäuses 2 erstreckt, wie dies in Fig. 2 sichtbar ist. Dabei bildet der Flansch 9, der ebenfalls abgestuft ausgebildet ist, mit seinem mittleren Teil eine Wandung 10 des Pumpengehäuses 2. In dem radial über den Wandungsbereich 10 hinausgehenden Bereich ist der Flansch als Befestigungsflansch 12 ausgebildet. Er weist hierzu vier Ausnehmungen 11 auf, die mit entsprechenden, mit Gewinde versehenen Ausnehmungen in der zum Motor weisenden Seite des Pumpengehäuses 2 fluchten. Durch die Ausnehmungen 11 sind Schrauben 13 geführt, mit denen der Befestigungsflansch 12 unter Eingliederung einer (nicht dargestellten) Dichtung am Pumpengehäuse 2 befestigt ist.At the cylindrical portion of the can 4, which is stepped to the pump housing 2, a flange 9 connects to the pump housing side end, which is formed integrally with the can 4 and extends transversely to the gap tube axis to near the lateral end of the pump housing 2, like this in Fig. 2 is visible. In this case, the flange 9, which is also stepped, forms with its central part a wall 10 of the pump housing 2. In the region extending radially beyond the wall region 10, the flange is designed as a fastening flange 12. He has for this purpose four recesses 11 which are aligned with corresponding, threaded recesses in the motor-facing side of the pump housing 2. Through the recesses 11 screws 13 are guided, with which the mounting flange 12 is fixed by incorporation of a seal (not shown) on the pump housing 2.

Auf dem Befestigungsflansch 12 sind auf der zum Motorgehäuse 1 weisenden Seite neben den Ausnehmungen 11 Zapfen 14 vorgesehen, welche in entsprechenden Ausnehmungen in der zum Pumpengehäuse 2 weisenden Stirnseite des Motorgehäuses 1 eingreifen. Die Zapfen 14 sind fest mit dem Flansch 9 verbunden. Das Spaltrohr 4 ist, wie insbesondere die Figuren 2 und 3 zeigen, unter Eingliederung des Rotors 5, der mittels zweier Lager 15 und 16 innerhalb des Spaltrohrs 4 drehbar gelagert ist, sowie des Laufrads 6 mit dem Pumpengehäuse 2 verschraubt, so dass die anhand von Fig. 2 dargestellte Montage- und Baueinheit bestehend aus Pumpengehäuse 2, Spaltrohr 4 mit Flansch 9 sowie Rotor 5, Laufrad 6 und Lagern 15, 16 gebildet ist. Diese Bau- und Montageeinheit gemäß Fig. 2 kann unabhängig vom Motorgehäuse 1 gehandhabt werden und trägt alle flüssigkeitsführenden Teile des Pumpenaggregats.On the mounting flange 12 11 pins 14 are provided on the side facing the motor housing 1 next to the recesses, which engage in corresponding recesses in the pump housing 2 facing end face of the motor housing 1. The pins 14 are fixedly connected to the flange 9. The split tube 4 is, in particular the Figures 2 and 3 show, with inclusion of the rotor 5, which is rotatably supported by means of two bearings 15 and 16 within the gap tube 4, and the impeller 6 screwed to the pump housing 2, so that the basis of Fig. 2 shown assembly and assembly consisting of pump housing 2, canned 4 with flange 9 and rotor 5, impeller 6 and bearings 15, 16 is formed. This construction and assembly unit according to Fig. 2 Can be handled independently of the motor housing 1 and carries all fluid-carrying parts of the pump set.

Zum motorseitigen Ende hin ist das Spaltrohr 4 mittels eines Verschlussstopfens 17 abgeschlossen. Zur Aufnahme dieses Verschlussstopfens 17, welcher mit einem Außengewinde und einer Dichtung versehen ist, ist am motorseitigen Ende des Spaltrohrs 4 eine ringförmige Aufnahme 18 angeordnet, welche durch eine umlaufende Schweißnaht 19 mit dem Spaltrohr 4 fest und dicht verbunden ist. Die Aufnahme 18 ist durch einen Metallring gebildet, dessen Außenumfang dem des Spaltrohrs 4 entspricht, dessen Innenumfang jedoch kleiner ist, so dass dort ein Innengewinde zur Aufnahme des Verschlussstopfens 17 sowie ein Dichtsitz vorgesehen sein kann.Towards the motor end, the gap tube 4 is closed by means of a sealing plug 17. For receiving this sealing plug 17, which is provided with an external thread and a seal, an annular receptacle 18 is arranged at the motor end of the can 4, which is firmly and tightly connected by a peripheral weld 19 with the can 4. The receptacle 18 is formed by a metal ring whose outer circumference corresponds to that of the split tube 4, whose inner circumference is smaller, so that there may be provided an internal thread for receiving the sealing plug 17 and a sealing seat.

Weiterhin ist am Außenumfang der Aufnahme 18 eine umlaufende Nut 20 vorgesehen, welche zur Befestigung des Motorgehäuses 1 am Spaltrohr 4 bzw. an dem damit verbundenen Pumpengehäuse 2 vorgesehen ist. Wenn das Motorgehäuse 1 bündig am Pumpengehäuse 2 anliegt, wie dies anhand von Fig. 1 dargestellt ist, dann durchsetzt das Spaltrohr 4 das Motorgehäuse 1 zentral, so dass die Außenseite des Verschlussstopfens 17 etwa bündig mit der von der Pumpe abgewandten Stirnseite des Motorgehäuses 1 abschließt. Dabei greifen die Zapfen 14 in entsprechende Ausnehmungen des Motorgehäuses, so dass eine Verdrehsicherung gebildet ist, welche das Motorgehäuse 1 drehfest in Bezug auf das Spaltrohr 4 hält.Furthermore, a circumferential groove 20 is provided on the outer circumference of the receptacle 18, which is provided for fastening the motor housing 1 on the can 4 or on the associated pump housing 2. When the motor housing 1 is flush with the pump housing 2, as indicated by Fig. 1 is shown, then penetrates the can 4, the motor housing 1 centrally, so that the outside of the sealing plug 17 terminates approximately flush with the side facing away from the pump end face of the motor housing 1. The pins 14 engage in corresponding recesses of the motor housing, so that an anti-rotation is formed, which rotatably holds the motor housing 1 with respect to the can 4.

In Achsrichtung des Spaltrohrs 4 befestigt ist das Motorgehäuse 1 mittels einer endseitigen Platte 21, welche einen in das Motorgehäuse 1 gerichteten, unterbrochenen Ringabschnitt 22 aufweist, der eine nach innen gerichtete, ebenfalls in Umfangsrichtung unterbrochene Rastnase trägt, die formschlüssig unter Eingliederung des Motorgehäuses 1 in die Nut 20 der Aufnahme 18 des Spaltrohrs 4 eingreift und damit das Motorgehäuse 1 in Achsrichtung zum Pumpengehäuse 2 festlegt. Die Platte 21 trägt das Typenschild des Pumpenaggregates. Die durch den Ringabschnitt 22 gebildete zentrale Durchbrechung ist durch das freie Ende der Aufnahme 18 mit dem Verschlussstopfen 17 durchsetzt, so dass Letzterer von dieser Stirnseite des Motorgehäuses 1 frei zugänglich ist.Fixed in the axial direction of the can 4, the motor housing 1 by means of an end plate 21, which has a directed into the motor housing 1, interrupted ring portion 22 which carries an inwardly directed, also interrupted in the circumferential direction locking lug, the form-fitting integration of the motor housing 1 in the groove 20 of the receptacle 18 of the can 4 engages and thus determines the motor housing 1 in the axial direction of the pump housing 2. The plate 21 carries the nameplate of the pump unit. The central opening formed by the annular portion 22 is penetrated by the free end of the receptacle 18 with the sealing plug 17, so that the latter is freely accessible from this end face of the motor housing 1.

Wenn die Platte 21 mit dem Ringabschnitt 22 in der Nut 20 des Spaltrohrs 4 eingerastet ist, ergibt sich das in Fig. 1 dargestellte fertig montierte Kreiselpumpenaggregat. Zum Lösen des Motorgehäuses muss lediglich die Platte 21 entfernt werden, wonach das Motorgehäuse 1 vom Pumpengehäuse 2 bzw. vom Spaltrohr 4 abgezogen werden kann, wie dies in Fig. 3 dargestellt ist. Es wird deutlich, dass sämtliche elektrischen und elektronischen Teile damit auf einfache Weise von den flüssigkeitsführenden Teilen der Pumpe getrennt werden können, um diese ggf. bei einem Defekt zu ersetzen, zu reparieren, zu erneuern oder dergleichen. Ausgenommen hiervon ist natürlich der Rotor 5, der Teil des Motors bildet, jedoch innerhalb der fluidführenden Baueinheit gemäß Fig. 2 angeordnet ist.When the plate 21 is engaged with the ring portion 22 in the groove 20 of the can 4, this results in Fig. 1 illustrated fully assembled centrifugal pump unit. To release the motor housing, only the plate 21 has to be removed, after which the motor housing 1 can be pulled off from the pump housing 2 or from the can 4, as shown in FIG Fig. 3 is shown. It will be clear that all electrical and electronic parts can thus be easily separated from the fluid-carrying parts of the pump in order to replace, repair or replace them if necessary in the event of a defect. Except for this, of course, the rotor 5, which forms part of the engine, but within the fluid-carrying assembly according to Fig. 2 is arranged.

Bei dem dargestellten Pumpenaggregat handelt es sich um ein frequenzumrichtergesteuertes, wobei die gesamte Frequenzumrichterelektronik im Gehäuseteil 3 angeordnet ist. Da der den Stator aufnehmende Motorgehäuseteil gegenüber dem Gehäuseteil 3 zurückspringend ausgebildet ist, können in diesem Bereich eine Anzeige 23, ein Schalter zur Drehzahlvorwahl 24 sowie ein Netzstecker 25 angeordnet sein, deren elektrische Anschlüsse direkt in das dahinter liegende Gehäuseteil 3 reichen.In the illustrated pump unit is a frequenzumrichtergesteuertes, the entire frequency converter electronics in the housing part 3 is arranged. Since the motor housing part accommodating the stator is designed to spring back relative to the housing part 3, a display 23, a switch for speed selection 24 and a power plug 25 can be arranged in this area, the electrical connections of which extend directly into the housing part 3 lying behind.

Das in dem anhand der Figuren 2 und 3 dargestellte Spaltrohr 4 ist in Fig. 4 im Einzelnen dargestellt. Es besteht aus dem eigentlichen Spaltrohr 4, das zum Flansch 9 abgestuft aufgeweitet ausgebildet ist und dort eine Aufnahme für das Lager 16 bildet, wohingegen das Lager 15 in dem zylindrischen Bereich des Spaltrohrs 4 angeordnet ist, der den Stator durchsetzt. An das Spaltrohr 4 schließt sich zu einer Seite der Flansch 9 an, der im Wesentlichen durch die Wandung 10 und den Befestigungsflansch 12 gebildet ist. Wie insbesondere Fig. 4a und c verdeutlichen, ist der Flansch 9 im Bereich der Wandung 10 u-förmig ausgebildet und zusätzlich zum Motor hin eingezogen, wobei die eigentliche Wandung 10 der Pumpe durch den Steg des u-förmigen Querschnitts gebildet wird. Der Befestigungsflansch 12 schließt sich radial an den Schenkel des U an und ist flach ausgebildet. Der innere Schenkel des U-Profils mit dem daran anschließenden Stegbereich ist passend zu dem dort zur Anlage kommenden Endbereich des Spaltrohrs 4 ausgebildet, die in diesem Bereich umlaufend miteinander verschweißt sind. Am anderen Ende des Spaltrohrs 4 schließt sich die Aufnahme 18 an, die ebenfalls umlaufend verschweißt ist und den Verschlussstopfen 17 aufnimmt.That in the basis of the Figures 2 and 3 illustrated can 4 is in Fig. 4 shown in detail. It consists of the actual gap tube 4, which is formed expanded stepped to the flange 9 and there forms a receptacle for the bearing 16, whereas the bearing 15 is arranged in the cylindrical portion of the can 4, which passes through the stator. The gap 4 is adjoined on one side by the flange 9, which is essentially formed by the wall 10 and the fastening flange 12. In particular Fig. 4a and c illustrate, the flange 9 is formed in the region of the wall 10 U-shaped and additionally retracted to the engine, wherein the actual wall 10 of the pump is formed by the web of the U-shaped cross section. The mounting flange 12 connects radially to the leg of the U and is formed flat. The inner leg of the U-profile with the adjoining web region is designed to match the end region of the can 4 which comes into abutment there, which are welded circumferentially to one another in this region. At the other end of the can 4, the receptacle 18 connects, which is also welded circumferentially and receives the plug 17.

Die Zapfen 14 sind fest mit dem Befestigungsflansch 12 verbunden, beispielsweise durch Nieten oder Schweißen.The pins 14 are fixedly connected to the mounting flange 12, for example by riveting or welding.

Fig. 5 zeigt eine alternative Ausbildung des Spaltrohrs, die sich von der anhand von Fig. 4 vorbeschriebenen dadurch unterscheidet, dass zwischen dem das eigentliche Spaltrohr 4 bildenden Bauteil und dem Flansch 9 ein versteifender Ringwulst 26 vorgesehen ist, der aus einem einerseits an dem das Spaltrohr 4 bildenden Bauteil 26a angeformt und andererseits an der Innenseite des die Wandung 10 bildenden Bauteils 26a angeformt ist. Die Teile 26a und 26b sind aneinander anliegend miteinander verschweißt, so dass sich auch hier ein einstückiges Bauteil ergibt. Wie insbesondere die Querschnittsdarstellung gemäß Fig. 5b verdeutlicht, wird durch diesen Ringwulst 26 eine deutliche Versteifung insbesondere des Flansch 9 erreicht und die Schweißnaht, welche die Bauteile im Bereich des Ringwulstes 26 verbindet, aus dem Wandungsbereich 10 nach außen verlegt, was fertigungstechnisch hinsichtlich Vermeidung etwaigen Verzugs und Zugänglichkeit beim Schweißen besonders günstig ist. Die vorstehend anhand der Figuren 4 und 5 aus Spaltrohr 4 und Flansch 9 sowie der Aufnahme 18 gebildeten einstückigen Bauteile können, soweit es das Spaltrohr 4 und den Flansch 9 angeht, jeweils aus Blechformteilen, typischerweise aus Edelstahl gebildet werden, aber auch aus Kunststoff hergestellt sein. Dabei kommt entweder diffusionsdichter Kunststoff oder metallbeschichteter, vorzugsweise durch Aufdampfen beschichteter Kunststoff in Betracht. Auch können andere Fertigungstechniken zur Anwendung kommen. So kann beispielsweise im Bereich des Ringwulstes 26 eine Verbindung durch Rollen oder andere Umformtechniken erzeugt werden. Fig. 5 shows an alternative embodiment of the split tube, which differs from the basis of Fig. 4 above characterized differs in that between the actual gap 4 forming the component and the flange 9, a stiffening annular bead 26 is provided, which integrally formed on the one hand on the gap tube 4 forming member 26a and on the other hand on the inside of the wall 10 forming member 26a is. The parts 26a and 26b are welded together adjacent to each other, so that here also results in a one-piece component. As in particular the cross-sectional view according to Fig. 5b clarifies, is achieved by this annular bead 26 a significant stiffening particular of the flange 9 and the weld, which connects the components in the region of the annular bead 26, laid out of the wall portion 10 to the outside, which is particularly favorable manufacturing technology in terms of avoiding possible distortion and accessibility during welding , The above based on the FIGS. 4 and 5 formed from the can 4 and flange 9 and the receptacle 18 integral components can, as far as the can 4 and the flange 9 is concerned, each formed from sheet metal parts, typically made of stainless steel, but also be made of plastic. In this case either diffusion-proof plastic or metal-coated, preferably coated by vapor deposition plastic into consideration. Also other manufacturing techniques can be used. For example, in the region of the annular bead 26, a connection can be produced by rolling or other forming techniques.

Anhand der Figuren 6 und 7 ist dargestellt, wie ein aus Kunststoff hergestelltes Spaltrohr 4 ausgebildet sein kann. Bei der dort dargestellten Ausbildung ist jedoch auch die Lagerung des Rotors innerhalb des Spaltrohres von dem vorbeschriebenen abweichend. Die beiden Radiallager 15 und 16 sind dort nicht wie bei den vorbeschriebenen Ausführungsformen nahe den Enden des Rotors angeordnet, sondern im mittleren Bereich des Rotors, also zwischen dem für den Motor wirksamen magnetischen Teil des Rotors 5 und dem Laufrad 7, was den Vorteil hat, dass der Spaltbereich zwischen dem motorseitigem Teil des Rotors 5 und dem Spaltrohr 4 ausschließlich im Hinblick auf eine möglichst hohe Kraftübertragung zwischen Stator und Rotor ausgebildet sein kann und die Lagerung in dem bei der Ausführung gemäß Fig. 6 und 7 aufgeweitetem Bereich daneben erfolgen kann, wie aus Fig. 6 ersichtlich ist. Werkstoffbedingt ist das Spaltrohr 4 mit sternförmig angeordneten Versteifungsrippen 27 auf der Außenseite versehen, die im Wesentlichen radial verlaufen und sich zwischen dem Flansch 9 die Wandung 10 abstützend bis etwa zum mittleren im Querschnitt ringförmigen, in das eigentliche Spaltrohr 4 auslaufenden Teil erstrecken. Auch sind im Flansch 9 Ausnehmungen 28 vorgesehen um Materialanhäufungen innerhalb des Gussteils zu vermeiden. Das anhand der Figuren 6 und 7 beispielhaft dargestellte aus Kunststoff ausgebildete Spaltrohr kann auch aus anderen Werkstoffen beispielsweise Metall ausgebildet sein.Based on FIGS. 6 and 7 is shown how a made of plastic can 4 may be formed. In the embodiment shown there, however, the storage of the rotor within the can is deviating from the above. The two radial bearings 15 and 16 are not arranged there as in the above-described embodiments near the ends of the rotor, but in the central region of the rotor, ie between the effective for the engine magnetic part of the rotor 5 and the impeller 7, which has the advantage that the gap region between the motorseitigem part of the rotor 5 and the can 4 may be formed exclusively with regard to the highest possible power transmission between the stator and rotor and the storage in the at according to the execution 6 and 7 widened area next to it can, as from Fig. 6 is apparent. As a result of the material, the can 4 is provided with star-shaped stiffening ribs 27 on the outer side, which extend substantially radially and extend between the flange 9 supporting the wall 10 to approximately the central annular cross-section which extends into the actual can 4. Also, recesses 28 are provided in the flange 9 to avoid material accumulation within the casting. That on the basis of FIGS. 6 and 7 formed example of plastic canned can also be made of other materials such as metal.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1 -1 -
Motorgehäusemotor housing
2 -2 -
Pumpengehäusepump housing
3 -3 -
Gehäuseteil von 1Housing part of 1
4 -4 -
Spaltrohrcanned
5 -5 -
Rotorrotor
6 -6 -
LaufradWheel
7 -7 -
Einlassstutzeninlet port
8 -8th -
Auslassstutzenoutlet
9 -9 -
Flanschflange
10 -10 -
Wandungwall
11 -11 -
Ausnehmungenrecesses
12 -12 -
Befestigungsflanschmounting flange
13 -13 -
Schraubenscrew
14 -14 -
Zapfenspigot
15 -15 -
Lagercamp
16 -16 -
Lagercamp
17 -17 -
Verschlussstopfensealing plug
18 -18 -
Aufnahmeadmission
19 -19 -
SchweißnahtWeld
20 -20 -
Nutgroove
21 -21 -
Platteplate
22 -22 -
Ringabschnittring section
23 -23 -
Anzeigedisplay
24 -24 -
Schalterswitch
25 -25 -
Netzsteckerpower plug
26 -26 -
Ringwulsttorus
26a und b -26a and b
RingwulstteileRingwulstteile
27 -27 -
Rippenribs
28 -28 -
Ausnehmungenrecesses

Claims (11)

Kreiselpumpenaggregat mit einem ein Pumpenlaufrad (6) aufnehmenden Pumpengehäuse (2), mit einem einen Stator aufnehmenden Motorgehäuse (1) und mit einem Spaltrohr (4), in dem ein mit dem Pumpenlaufrad (6) antriebsverbundener Rotor (5) angeordnet ist, dadurch gekennzeichnet, dass das Spaltrohr (4) unabhängig vom Motorgehäuse (1) am Pumpengehäuse (2) befestigt ist.Centrifugal pump unit having a pump housing (2) accommodating a pump impeller (6), a motor housing (1) accommodating a stator and a canned tube (4) in which a rotor (5) drivingly connected to the pump impeller (6) is arranged, characterized in that the can (4) is fastened to the pump housing (2) independently of the motor housing (1). Kreiselpumpenaggregat nach Anspruch 1, dadurch gekennzeichnet, dass das Spaltrohr (4) mit einen Flansch (9) versehen ist, mit dem es an die zum Motor weisende Seite des Pumpengehäuses (2) anschließt und mit dem es am Pumpengehäuse (2) vorzugsweise schraubbefestigt ist.Centrifugal pump unit according to claim 1, characterized in that the can (4) is provided with a flange (9), with which it connects to the motor-facing side of the pump housing (2) and with which it is preferably bolted to the pump housing (2) , Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Spaltrohr (4) mit seinem Flansch (9) aus mindestens zwei vorzugsweise aus Blech gebildeten Formteilen hergestellt ist.Centrifugal pump unit according to one of the preceding claims, characterized in that the gap tube (4) with its flange (9) is made of at least two moldings, preferably formed of sheet metal. Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jedes der Formteile (4, 9) einen parallel zum zylindrischen Teil des Spaltrohrs angeordneten und umlaufenden Abschnitt (26a, 26b) aufweist, und dass diese umlaufenden Abschnitte (26a, 26b) der Formteile (4, 9) aneinander anliegen, vorzugsweise dort umlaufend miteinander verschweißt sind, und eine Versteifungsrippe (26) bilden.Centrifugal pump unit according to one of the preceding claims, characterized in that each of the mold parts (4, 9) has a parallel to the cylindrical part of the can and arranged circumferential portion (26a, 26b), and in that these peripheral portions (26a, 26b) of the molded parts (4 4, 9) abut each other, preferably there are circumferentially welded together, and form a stiffening rib (26). Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Spaltrohr (4) an seinem vom Laufrad (6) abgewandten Ende mit einer Aufnahme (18) für einen Verschlusskörper (17) versehen ist und die Aufnahme (18) vorzugsweise umlaufend mit dem Spaltrohr (4) verschweißt ist.Centrifugal pump unit according to one of the preceding claims, characterized in that the gap tube (4) at its end facing away from the impeller (6) with a receptacle (18) for a closure body (17) is provided and the receptacle (18) preferably circumferentially with the split tube (4) is welded. Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Motorgehäuse (1) mit dem darin befindlichen Stator lösbar an der aus Spaltrohr (4) und Pumpengehäuse (2) gebildeten Einheit befestigt ist.Centrifugal pump unit according to one of the preceding claims, characterized in that the motor housing (1) with the stator therein is releasably secured to the unit formed from the can (4) and the pump housing (2). Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Motorelektronik oder zumindest ein Teil der Motorelektronik zwischen dem Stator und dem Pumpengehäuse (2) das Spaltrohr umgebend angeordnet istCentrifugal pump unit according to one of the preceding claims, characterized in that the engine electronics or at least part of the engine electronics between the stator and the pump housing (2) is arranged surrounding the can Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass Befestigungsmittel (20, 22) am Spaltrohr (4) vorgesehen sind, welche das Motorgehäuse (1) am Pumpengehäuse (2) festlegen.Centrifugal pump unit according to one of the preceding claims, characterized in that fastening means (20, 22) are provided on the can (4), which define the motor housing (1) on the pump housing (2). Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass nahe dem motorseitigen Ende des Spaltrohrs (4) eine umlaufende Nut (20) vorgesehen ist, in welche mindestens eine Rastnase einer endseitigen Platte (21) eingreift, wobei das Motorgehäuse (1) mittels dieser Platte (21) am Pumpengehäuse (2) festgelegt ist.Centrifugal pump unit according to one of the preceding claims, characterized in that close to the motor-side end of the can (4) a circumferential groove (20) is provided, in which engages at least one latching lug an end plate (21), wherein the motor housing (1) by means of this Plate (21) on the pump housing (2) is fixed. Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Platte (21) das Typenschild des Aggregats trägt.Centrifugal pump assembly according to one of the preceding claims, characterized in that the plate (21) carries the nameplate of the unit. Kreiselpumpenaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Verdrehsicherung (14) zwischen Pumpengehäuse (2) und Motorgehäuse (1) vorgesehen ist, vorzugsweise durch Formschlussmittel (14) zwischen Motor- und Pumpengehäuse.Centrifugal pump unit according to one of the preceding claims, characterized in that an anti-rotation device (14) between the pump housing (2) and the motor housing (1) is provided, preferably by positive locking means (14) between the motor and pump housing.
EP07024384.5A 2007-12-17 2007-12-17 Canned motor pump Not-in-force EP2072827B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07024384.5A EP2072827B1 (en) 2007-12-17 2007-12-17 Canned motor pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07024384.5A EP2072827B1 (en) 2007-12-17 2007-12-17 Canned motor pump

Publications (2)

Publication Number Publication Date
EP2072827A1 true EP2072827A1 (en) 2009-06-24
EP2072827B1 EP2072827B1 (en) 2017-06-28

Family

ID=39410497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07024384.5A Not-in-force EP2072827B1 (en) 2007-12-17 2007-12-17 Canned motor pump

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Country Link
EP (1) EP2072827B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2292932A3 (en) * 2009-07-15 2012-10-10 KSB Aktiengesellschaft Separating can
EP2808547A1 (en) * 2013-05-31 2014-12-03 Grundfos Holding A/S Actuation device for a pump assembly
CN108691782A (en) * 2017-03-31 2018-10-23 格兰富控股联合股份公司 Pump group part
IT201700103805A1 (en) * 2017-09-18 2019-03-18 Dab Pumps Spa ASSEMBLED OF PUMP WITH MOISTURE AREA ACCESSIBLE TO THE USER
EP2905472B1 (en) 2011-12-23 2020-03-04 Grundfos Holding A/S Wet running circulation pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984586A (en) * 1961-02-08 1965-02-24 Fostoria Corp Electric motor driven pumps
GB1071266A (en) * 1963-10-15 1967-06-07 Sigmund Pulsometer Pumps Ltd Liquid-moving unit comprising a centrifugal pump and an electric driving motor therefor
WO2001027477A1 (en) * 1999-10-14 2001-04-19 Kiho Kim Water pump (circulation pump) using no retainer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984586A (en) * 1961-02-08 1965-02-24 Fostoria Corp Electric motor driven pumps
GB1071266A (en) * 1963-10-15 1967-06-07 Sigmund Pulsometer Pumps Ltd Liquid-moving unit comprising a centrifugal pump and an electric driving motor therefor
WO2001027477A1 (en) * 1999-10-14 2001-04-19 Kiho Kim Water pump (circulation pump) using no retainer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2292932A3 (en) * 2009-07-15 2012-10-10 KSB Aktiengesellschaft Separating can
EP2905472B1 (en) 2011-12-23 2020-03-04 Grundfos Holding A/S Wet running circulation pump
EP2808547A1 (en) * 2013-05-31 2014-12-03 Grundfos Holding A/S Actuation device for a pump assembly
WO2014191169A3 (en) * 2013-05-31 2015-06-18 Grundfos Holding A/S Actuating device for a pump unit
US10294996B2 (en) 2013-05-31 2019-05-21 Grundfos Holding A/S Actuating device for a pump unit
CN108691782A (en) * 2017-03-31 2018-10-23 格兰富控股联合股份公司 Pump group part
US10941782B2 (en) 2017-03-31 2021-03-09 Grundfos Holding A/S Pump assembly
IT201700103805A1 (en) * 2017-09-18 2019-03-18 Dab Pumps Spa ASSEMBLED OF PUMP WITH MOISTURE AREA ACCESSIBLE TO THE USER

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