EP2072827A1 - Canned motor pump - Google Patents
Canned motor pump Download PDFInfo
- 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
Links
- 239000002184 metal Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- 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
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- 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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Abstract
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
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
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
- 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
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
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
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
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
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
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
Wenn die Platte 21 mit dem Ringabschnitt 22 in der Nut 20 des Spaltrohrs 4 eingerastet ist, ergibt sich das in
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
Das in dem anhand der
Die Zapfen 14 sind fest mit dem Befestigungsflansch 12 verbunden, beispielsweise durch Nieten oder Schweißen.The
Anhand der
- 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)
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 |
Country Status (1)
Country | Link |
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EP (1) | EP2072827B1 (en) |
Cited By (5)
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)
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 |
-
2007
- 2007-12-17 EP EP07024384.5A patent/EP2072827B1/en not_active Not-in-force
Patent Citations (3)
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)
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 |
Also Published As
Publication number | Publication date |
---|---|
EP2072827B1 (en) | 2017-06-28 |
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