WO2007023014A1 - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
- Publication number
- WO2007023014A1 WO2007023014A1 PCT/EP2006/063908 EP2006063908W WO2007023014A1 WO 2007023014 A1 WO2007023014 A1 WO 2007023014A1 EP 2006063908 W EP2006063908 W EP 2006063908W WO 2007023014 A1 WO2007023014 A1 WO 2007023014A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- motor housing
- centrifugal pump
- pump
- bobbin
- housing
- 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.)
- Ceased
Links
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
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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
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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
- F04D13/0633—Details of the bearings
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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
- F04D13/064—Details of the magnetic circuit
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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
- F04D13/0686—Mechanical details of the pump control unit
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal 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
- F04D29/60—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
Definitions
- the invention is based on a centrifugal pump according to the preamble of claim 1.
- a liquid pump in particular a water pump, is known. It is designed as a centrifugal pump, wherein a pump volute casing surrounds an impeller, which is driven by an electric motor. This is arranged coaxially with the impeller and has a housing which is open to the pump spiral housing.
- a pump volute casing is split in a plane transverse to the impeller rotation axis, with one half of the pressure spiral disposed in each part and an outer part comprising the inner part with a cylindrical fit. Between an outwardly projecting shoulder at the free end of the inner part and the end face of the outer part, a groove for receiving a sealing ring is formed, which is pushed during assembly in a cylindrical seat of the motor housing.
- the sealing ring is located both on the seat surface of the motor housing and on the groove forming surfaces of the inner and outer part of the spiral pump housing, so that after assembly, both the motor housing and the Spiralpumpengephase are sealed to the outside.
- the motor housing and the pump spiral housing are like a Bayonet closure connected together.
- the outer part of the spiral pump housing in the vicinity of the sealing ring on radially directed projections which are distributed over the circumference and are pushed axially during assembly between corresponding undercuts and reach behind undercuts on the motor housing.
- the projections reach behind the undercuts, wherein on the sealing ring an axial force is exerted and the sealing ring is sealingly supported on the adjacent components.
- An anti-twist device prevents the connection from unintentionally loosening again.
- the motor housing is cup-shaped and made of plastic, wherein its pump volute casing facing the bottom forms a common housing wall to the pump volute casing.
- the bottom of the motor housing facing the open end, to
- Rotation axis concentric protuberance with an approximately cylindrical partition wall and with an inner bottom. This has in its central region a thickening, in which a pump spiral housing pointing bearing axis is injected.
- a rotor of the electric motor in the usual way
- the impeller is integrally formed with the impeller and rotatably supported by an injected bearing on the bearing axis.
- the rotor and the impeller are axially secured on the bearing axis between the thickening and a starting mushroom. This is pushed onto the free end of the bearing shaft and engages with a rotation in a groove on the bearing axis.
- the starting mushroom projects with its outer contour into an inlet connection of the volute casing, its contour being designed so that favorable flow conditions result in the transition from the inlet connection to the impeller. Again, additional fasteners are not required.
- a coil body of the stator of the electric motor is used in the annular space between the partition and the outer wall of the motor housing, which closes the annulus with an end wall.
- the bobbin is also like a bayonet with the
- Motor housing connected by projections on the circumference of its end wall engage behind undercuts of the motor housing, which are directed radially inward. It is expedient that the bobbin externally supported by the delivery pressure walls of the motor housing and the forces on his
- the bobbin in the region of the annular space of the motor housing, starting from its End wall wound to the bottom of the motor housing with copper enamel wire whose wire ends are stored in intersections for insulation displacement terminals.
- a coil formed from the enameled copper wire is arranged in a radially open annular space of the coil former, over the opening of which a return ring is pushed onto the coil former as far as the end wall.
- the return ring is in contact with yoke parts that are injected in the bobbin.
- At the bases is located advantageously on a printed circuit board, which are held by insulation displacement connectors and their interconnects are contacted by press-fit contacts of the insulation displacement terminals.
- the motor housing is advantageously closed at the end by an electronics cover.
- This has an injected seal through which the connector pins are passed during assembly.
- the electronics cover is also mounted without additional fasteners. For this has the electronics cover at its periphery radially resilient latching hooks which engage in recesses of the outer wall of the motor housing during assembly.
- pins are molded onto the electronics cover, which are used to center the electronics cover relative to the
- Coil body and the circuit board engage in Vorzentrierhülsen.
- Fig. 1 is a longitudinal section through an inventive
- Fig. 2 is a perspective longitudinal section through a
- FIG. 3 shows a perspective view of a bobbin
- FIG. 4 is an enlarged detail of FIG. 3,
- FIG. 6 is a partial perspective view of a motor housing with a mounted bobbin
- Fig. 7 is a perspective view of a centrifugal pump with a cut motor housing and bobbin
- Fig. 8 is a perspective view of a centrifugal pump with a mounted circuit board.
- Essential components of a centrifugal pump 10 are a pump volute casing 12 with an inlet connection 102 and an outlet connection 104, a pump impeller 28 and an electric motor with a motor housing 14, a stator 34 and a bobbin 40 and with a circuit board 94 and an electronics cover 20.
- the motor housing 14 is made of plastic and cup-shaped. It has the pump spiral housing 12 toward a bottom 13, which forms a common housing wall to the one-piece pump spiral housing 12. To the outside adjoins the bottom 13 an outer wall 15, while in the central region of the bottom 13 has an invagination, which is formed by an inner bottom 17 and a partition 19.
- the inner bottom 17 has in its center a thickening 18, in which a bearing axis 22 is injected.
- the motor housing 14 is hermetically sealed to the pump volute casing 12.
- a rotor 36 is mounted rotatably about an axis of rotation 29 by means of an injected bearing 30.
- the end face of the rotor 36, the pump impeller 28 is formed, which projects axially into the pump volute casing 12 and is flowed through radially from the inlet port 102 to the outlet port 104.
- the axis of rotation of the pump impeller 28 is denoted by 37.
- the rotor 36 and the impeller 28 are axially secured on the bearing axis 22 between the thickening 18 and a run-up mushroom 24, at which the bearing 30 starts axially.
- the starting mushroom 24 is pushed over the free end of the bearing shaft 22 and locked in a groove 32, wherein the starting mushroom 24 has an anti-rotation, not shown.
- the outer contour of the starting mushroom 24 facing the inlet connection 102 is designed in such a way that a favorable inflow of the impeller 28 results.
- the pump volute casing 12 is a kind of
- Bajonettver gleiches connected to the motor housing 14 by radial projections 74 on the circumference of the motor housing 14 are pushed axially between corresponding undercuts 78 of the spiral pump housing 12 and by rotating the pump spiral housing 12 by an angle of about 15 ° relative to the motor housing 14, the projections 74 behind the undercuts 78 arrive.
- an axial force is exerted on a sealing ring 72 arranged between the volute casing 12 and the bottom 13 of the motor housing 14 in the form of an O-ring.
- a arranged in the circumferential direction on the circumference of the motor housing 14 latch hook 80 locked in the final position with a stop 82 on the pump spiral housing 12, so that the motor housing 14 is fixed relative to the pump spiral housing 12 in the circumferential direction.
- a bobbin 40th of the stator 34 used in the annular space between the outer wall 15 and the partition wall 19 of the motor housing 14 . It is connected to the motor housing 14 in the manner of a bayonet closure by protrusions 56 are pushed along the circumference of an end wall 41 of the bobbin 40 between corresponding undercuts 62 on the motor housing 14 and reach by a clockwise rotation about 40 ° behind the undercuts 62 and so the stator 34 with the bobbin 40 in the motor housing 14 fasten.
- at least one coding 64 advantageously by three codes, only one mounting position is possible.
- the bobbin 40 has in the region of its projection 56 a latching hook 58, which serves as anti-rotation and in the end position of the bobbin 40 in a recess 66 of the motor housing 14 engages (Fig. 6).
- the latching hook 58 is biased by the outwardly conically diverging inside of the outer wall 15 of the motor housing 14.
- Spool 40 from this area and transmits the forces in a short way as tensile forces on its projections 56 on the undercuts 62 of the motor housing 14.
- the bobbin 40 also prevents the partition wall 19 extends, resulting in the position of the electronics, in particular a printed circuit board 94th would shift in the axial direction.
- the bobbin 40 is in the region of the annular space between the partition wall 19 and the outer wall 15 between its end wall 41st and the bottom 13 of the motor housing 14 wound with a copper enamel wire 52, the ends of which are stored in support points 42, 44, 46 on the electronics cover 20 side facing the end wall 41 of the bobbin 40.
- the coil formed by the copper enamel wire 52 is housed in a radially open annular space of the bobbin 40.
- the annular space is closed by a return ring 38 which is pushed onto the bobbin 40 with pressure and contacts yoke parts 39, which are injected into the bobbin 40 in the area of the coil.
- a Hall sensor 98 is provided, which is inserted into a pocket 60 of the bobbin 40, wherein its pre-bent pins 54 are stored in a base 44.
- the location of the Hall sensor 98 can by a
- Glue point to be secured The ends of the enameled copper wire 52 and the pins 54 are contacted by insulation displacement terminals 48, which are pressed into the associated support points 42, 44.
- the insulation displacement terminal 48 which is assigned to the support point 46, has only holding functions in order to fasten the printed circuit board 94 without bending at the support points.
- the insulation displacement terminals 48 have press-fit contacts 86 at their free ends.
- the printed circuit board 94 is then pressed onto them and their printed conductors are contacted. As a result, all the necessary electrical connections to the electronics are made.
- connector pins 88 are also pre-assembled for the connector in soldering or press-fitting.
- the electronics cover 20 is pushed with its preassembled O-ring 96 at its periphery into the open end of the motor housing 14, wherein the O-ring 96 is compressed by the conically outwardly diverging inside of the outer wall 15.
- the electronics cover 20 has distributed over its circumference locking hooks 92 which are radially resilient and engage in the end position of the electronics cover 20 in recesses 16 of the motor housing 14.
- pins 90 are molded onto the inside of the electronics cover, which slide in Vorzentrierhülsen 50. These are on the
- the electronics cover 20 has openings with an injected seal 26 through which the connector pins 88 of the circuit board 94 are pushed. So that the printed circuit board 94 is not subjected to bending, 88 support points 100 are in the area of the connector pins
- Coil bobbin 40 is provided, on which the circuit board 94 is supported. In the case of changes in length due to internal pressure or thermal expansion of the components, these can be passed on to the connector by displacing the connector pins 88 through the molded-on seal 26, without a large force being exerted on the electrical connections of the printed circuit board 20.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Kreiselpumperotary pump
Stand der TechnikState of the art
Die Erfindung geht von einer Kreiselpumpe nach dem Oberbegriff des Anspruchs 1 aus .The invention is based on a centrifugal pump according to the preamble of claim 1.
Aus der DE 102 04 459 Al ist eine Flüssigkeitspumpe, insbesondere eine Wasserpumpe, bekannt. Sie ist als Kreiselpumpe ausgebildet, wobei ein Pumpenspiralgehäuse ein Pumpenrad umgibt, das von einem Elektromotor angetrieben wird. Dieser ist koaxial zum Pumpenrad angeordnet und besitzt ein Gehäuse, das zum Pumpenspiralgehäuse hin offen ist. DasFrom DE 102 04 459 Al a liquid pump, in particular a water pump, is known. It is designed as a centrifugal pump, wherein a pump volute casing surrounds an impeller, which is driven by an electric motor. This is arranged coaxially with the impeller and has a housing which is open to the pump spiral housing. The
Pumpenspiralgehäuse ist in einer Ebene quer zur Rotationsachse des Pumpenrads geteilt, wobei in jedem Teil eine Hälfte der Druckspirale angeordnet ist und ein äußerer Teil den inneren Teil mit einer zylindrischen Passung umfasst. Zwischen einer nach außen vorstehenden Schulter am freien Ende des inneren Teils und der Stirnseite des äußeren Teils wird eine Nut zur Aufnahme eines Dichtrings gebildet, der bei der Montage in einen zylindrischen Sitz des Motorgehäuses geschoben wird. Dabei liegt der Dichtring sowohl an der Sitzfläche des Motorgehäuses an als auch an den die Nut bildenden Flächen des inneren und äußeren Teils des Spiralpumpengehäuses, sodass nach der Montage sowohl das Motorgehäuse als auch das Spiralpumpengehäuse nach außen abdichtet sind. Das Motorgehäuse und das Pumpenspiralgehäuse sind nach Art eines Bajonettverschlusses miteinander verbunden. Dazu weist der äußere Teil des Spiralpumpengehäuses in der Nähe des Dichtrings radial gerichtete Vorsprünge auf, die auf den Umfang verteilt sind und bei der Montage zwischen entsprechende Hinterschnitte axial hindurchgeschoben werden und hinter Hinterschnitte am Motorgehäuse gelangen. Indem das Pumpenspiralgehäuse um einen vorgegeben Winkel relativ zum Motorgehäuse verdreht wird, gelangen die Vorsprünge hinter die Hinterschnitte, wobei auf den Dichtring eine axiale Kraft ausgeübt wird und der Dichtring sich dichtend an den angrenzenden Bauteilen abstützt. Eine Verdrehsicherung verhindert, dass sich die Verbindung ungewollt wieder löst. Zum Verbinden des Motorgehäuses mit dem Pumpenspiralgehäuse sind keine zusätzlichen Befestigungsmittel und nur ein einziger Dichtring erforderlich. Dadurch ist die Montage und Demontage der Pumpe einfach und die Kosten der Fertigung und Reparatur sind gering.A pump volute casing is split in a plane transverse to the impeller rotation axis, with one half of the pressure spiral disposed in each part and an outer part comprising the inner part with a cylindrical fit. Between an outwardly projecting shoulder at the free end of the inner part and the end face of the outer part, a groove for receiving a sealing ring is formed, which is pushed during assembly in a cylindrical seat of the motor housing. In this case, the sealing ring is located both on the seat surface of the motor housing and on the groove forming surfaces of the inner and outer part of the spiral pump housing, so that after assembly, both the motor housing and the Spiralpumpengehäuse are sealed to the outside. The motor housing and the pump spiral housing are like a Bayonet closure connected together. For this purpose, the outer part of the spiral pump housing in the vicinity of the sealing ring on radially directed projections which are distributed over the circumference and are pushed axially during assembly between corresponding undercuts and reach behind undercuts on the motor housing. By the pump volute casing is rotated by a predetermined angle relative to the motor housing, the projections reach behind the undercuts, wherein on the sealing ring an axial force is exerted and the sealing ring is sealingly supported on the adjacent components. An anti-twist device prevents the connection from unintentionally loosening again. For connecting the motor housing with the pump spiral housing no additional fastening means and only a single sealing ring are required. As a result, the assembly and disassembly of the pump is easy and the cost of manufacturing and repair are low.
Vorteile der ErfindungAdvantages of the invention
Nach der Erfindung ist das Motorgehäuse topfförmig ausgebildet und aus Kunststoff gefertigt, wobei sein dem Pumpenspiralgehäuse zugewandter Boden eine gemeinsame Gehäusewand zum Pumpenspiralgehäuse bildet. Dadurch ergibt sich eine kompakte Bauweise mit einer hermetischen Abdichtung zwischen den Strom führenden Bereichen des Elektromotors, nämlich dem Stator, einer Leiterplatte und einem Elektronikdeckel und den Flüssigkeit führenden Teilen des Pumpenteils. Gleichzeitig wird die Anzahl der Teile reduziert und die einfache Verbindung des Motorgehäuses mit dem Spiralgehäuse nach Art eines Bajonettverschlusses erhalten. Durch die Relativdrehung der Teile zueinander wird bei der erfindungsgemäßen Verbindung keine axiale Verschiebung der Teile bewirkt. Die axiale Zustellung der Teile zueinander wird vor der Drehbewegung aufgebracht. Dadurch werden Toleranzprobleme vermieden.According to the invention, the motor housing is cup-shaped and made of plastic, wherein its pump volute casing facing the bottom forms a common housing wall to the pump volute casing. This results in a compact design with a hermetic seal between the current-carrying areas of the electric motor, namely the stator, a printed circuit board and an electronics cover and the liquid-carrying parts of the pump part. At the same time, the number of parts is reduced and the simple connection of the motor housing with the spiral housing obtained in the manner of a bayonet fitting. Due to the relative rotation of the parts to each other in the connection according to the invention no axial displacement of the parts is effected. The axial delivery of the parts to each other is applied before the rotational movement. This avoids tolerance problems.
Gemäß einer Ausgestaltung der Erfindung weist der Boden des Motorgehäuses eine zum offenen Ende weisende, zurAccording to one embodiment of the invention, the bottom of the motor housing facing the open end, to
Rotationsachse konzentrische Ausstülpung mit einer annähernd zylindrischen Trennwand und mit einem Innenboden auf. Dieser besitzt in seinem mittleren Bereich eine Verdickung, in der eine zum Pumpenspiralgehäuse weisende Lagerachse eingespritzt ist. Ein Rotor des Elektromotors, der in üblicher WeiseRotation axis concentric protuberance with an approximately cylindrical partition wall and with an inner bottom. This has in its central region a thickening, in which a pump spiral housing pointing bearing axis is injected. A rotor of the electric motor, in the usual way
Permanentmagnete aufweist, ist mit dem Pumpenrad einstückig ausgebildet und über ein eingespritztes Lager auf der Lagerachse drehbar gelagert. In vorteilhafter Weise sind der Rotor und das Pumpenrad auf der Lagerachse zwischen der Verdickung und einem Anlaufpilz axial gesichert. Dieser wird auf das freie Ende der Lagerachse geschoben und rastet mit einer Verdrehsicherung in einem Einstich an der Lagerachse ein. Der Anlaufpilz ragt mit seiner äußeren Kontur in einen Einlassstutzen des Spiralgehäuses, wobei seine Kontur so ausgelegt ist, dass sich im Übergang vom Einlaufstutzen zum Pumpenrad günstige Strömungsverhältnisse ergeben. Auch hier sind zusätzliche Befestigungsmittel nicht erforderlich. Gemäß einer Ausgestaltung der Erfindung ist in dem Ringraum zwischen der Trennwand und der Außenwand des Motorgehäuses ein Spulenkörper des Stators des Elektromotors eingesetzt, der den Ringraum mit einer Stirnwand verschließt. Der Spulenkörper ist ebenfalls nach Art eines Bajonettverschlusses mit demHaving permanent magnets, is integrally formed with the impeller and rotatably supported by an injected bearing on the bearing axis. Advantageously, the rotor and the impeller are axially secured on the bearing axis between the thickening and a starting mushroom. This is pushed onto the free end of the bearing shaft and engages with a rotation in a groove on the bearing axis. The starting mushroom projects with its outer contour into an inlet connection of the volute casing, its contour being designed so that favorable flow conditions result in the transition from the inlet connection to the impeller. Again, additional fasteners are not required. According to one embodiment of the invention, a coil body of the stator of the electric motor is used in the annular space between the partition and the outer wall of the motor housing, which closes the annulus with an end wall. The bobbin is also like a bayonet with the
Motorgehäuse verbunden, indem Vorsprünge am Umfang seiner Stirnwand hinter Hinterschnitte des Motorgehäuses greifen, die radial nach innen gerichtet sind. Dabei ist es zweckmäßig, dass der Spulenkörper die vom Förderdruck beaufschlagten Wände des Motorgehäuses außen abstützt und die Kräfte über seineMotor housing connected by projections on the circumference of its end wall engage behind undercuts of the motor housing, which are directed radially inward. It is expedient that the bobbin externally supported by the delivery pressure walls of the motor housing and the forces on his
Vorsprünge auf die Hinterschnitte des Motorgehäuses überträgt, sodass die Wände des Motorgehäuses in diesem Bereich sehr dünn gehalten werden können. Außerdem verhindert er eine Verlängerung der Trennwand. Durch die Verlängerung würde sich eine Verlagerung der Position der Elektronik ergeben, die in dem Teil des Motorgehäuses untergebracht ist, der sich zum freien Ende hin an den Spulenkörper anschließt. Die von den inneren Wänden des Motorgehäuses auf den Spulenkörper übertragenen Kräfte wirken in diesem als Zugkräfte und werden auf kurzem Weg auf die stabile Außenwand übertragen. Außerdem ergeben sich bei der Verbindung zwischen dem Spulenkörper und dem Motorgehäuse die gleichen Vorteile wie bei der Verbindung zwischen dem Pumpenspiralgehäuse und dem Motorgehäuse. Eine Fehlmontage wird zweckmäßigerweise durch mindestens eine Codierung im Bereich der Hinterschnitte des Motorgehäuses verhindert .Transfers projections to the undercuts of the motor housing, so that the walls of the motor housing can be kept very thin in this area. He also prevents an extension of the partition. The extension would result in a shift in the position of the electronics housed in the part of the motor housing which adjoins the bobbin towards the free end. The transmitted from the inner walls of the motor housing on the bobbin forces act as tensile forces in this and are transmitted to the stable outer wall on a short path. In addition, the connection between the bobbin and the motor housing results in the same advantages as in the connection between the pump spiral housing and the motor housing. An incorrect assembly is expediently prevented by at least one coding in the region of the undercuts of the motor housing.
Bei einer weiteren Ausgestaltung wird der Spulenkörper im Bereich des Ringraums des Motorgehäuses ausgehend von seiner Stirnwand zum Boden des Motorgehäuses hin mit Kupferlackdraht bewickelt, dessen Drahtenden in Stützpunkten für Schneidklemmen abgelegt sind. Eine aus dem Kupferlackdraht gebildete Spule ist in einem radial offenen Ringraum des Spulenkörpers angeordnet, über dessen Öffnung mit Pressung ein Rückschlussring auf den Spulenkörper bis zur Stirnwand geschoben ist. Der Rückschlussring steht im Kontakt mit Jochteilen, die im Spulenkörper eingespritzt sind. An den Stützpunkten liegt in vorteilhafter Weise eine Leiterplatte an, die durch Schneidklemmen gehalten und deren Leiterbahnen durch Einpresskontakte der Schneidklemmen kontaktiert sind. Dadurch ergibt sich eine sichere Halterung der Lagerplatte, die keinen großen Montageaufwand erfordert, da sich die Kontaktierung bei der Montage durch die Befestigungsart von selbst ergibt. Ferner ist es zweckmäßig, in einer Tasche der Stirnwand des Spulenkörpers auf der dem Rotor zugewandten Seite einen Hallsensor vorzusehen, dessen Pins in einem Stützpunkt abgelegt sind und durch Einpressen der Schneidklemmen in den zugeordneten Stützpunkt elektrisch mit den Schneidklemmen kontaktiert sind. Diese besitzen Einpresskontakte, die eine Leiterplatte halten und deren Leiterbahnen entsprechend kontaktieren. In die Leiterplatte sind Steckerpins für einen Anschlussstecker vormontiert.In a further embodiment, the bobbin in the region of the annular space of the motor housing, starting from its End wall wound to the bottom of the motor housing with copper enamel wire whose wire ends are stored in intersections for insulation displacement terminals. A coil formed from the enameled copper wire is arranged in a radially open annular space of the coil former, over the opening of which a return ring is pushed onto the coil former as far as the end wall. The return ring is in contact with yoke parts that are injected in the bobbin. At the bases is located advantageously on a printed circuit board, which are held by insulation displacement connectors and their interconnects are contacted by press-fit contacts of the insulation displacement terminals. This results in a secure mounting of the bearing plate, which does not require much installation effort, since the contact results in the assembly by the mounting of itself. Furthermore, it is expedient to provide in a pocket of the end wall of the bobbin on the rotor side facing a Hall sensor whose pins are stored in a base and are contacted by pressing the insulation displacement terminals in the associated support point electrically to the insulation displacement terminals. These have press-fit contacts which hold a printed circuit board and contact their printed conductors accordingly. In the circuit board connector pins are pre-assembled for a connector.
Das Motorgehäuse wird stirnseitig zweckmäßigerweise durch einen Elektronikdeckel verschlossen. Dieser weist eine eingespritzte Dichtung auf, durch die die Steckerpins bei der Montage hindurchgeführt werden. Der Elektronikdeckel wird ebenfalls ohne zusätzliche Befestigungsmittel montiert. Hierzu besitzt der Elektronikdeckel an seinem Umfang radial nachgiebige Rasthaken, die in Aussparungen der Außenwand des Motorgehäuses bei der Montage einrasten. Um die Montage zu vereinfachen, sind am Elektronikdeckel Stifte angespritzt, die zum Zentrieren des Elektronikdeckels gegenüber demThe motor housing is advantageously closed at the end by an electronics cover. This has an injected seal through which the connector pins are passed during assembly. The electronics cover is also mounted without additional fasteners. For this has the electronics cover at its periphery radially resilient latching hooks which engage in recesses of the outer wall of the motor housing during assembly. In order to simplify assembly, pins are molded onto the electronics cover, which are used to center the electronics cover relative to the
Spulenkörper und der Leiterplatte in Vorzentrierhülsen eingreifen .Coil body and the circuit board engage in Vorzentrierhülsen.
Zeichnungdrawing
Weitere Vorteile ergeben sich aus der folgendenFurther advantages result from the following
Zeichnungsbeschreibung. In der Zeichnung sindDrawing description. In the drawing are
Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Embodiments of the invention shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Es zeigen:Show it:
Fig. 1 einen Längsschnitt durch eine erfindungsgemäßeFig. 1 is a longitudinal section through an inventive
Kreiselpumpe,Centrifugal pump,
Fig. 2 einem perspektivischen Längsschnitt durch einFig. 2 is a perspective longitudinal section through a
Motorgehäuse, Fig. 3 eine perspektivische Ansicht eines Spulenkörpers,3 shows a perspective view of a bobbin,
Fig. 4 eine vergrößerte Einzelheit aus Fig. 3,4 is an enlarged detail of FIG. 3,
Fig. 5 einen Längsschnitt durch einen Spulenkörper,5 shows a longitudinal section through a bobbin,
Fig. 6 eine perspektivische Teilansicht eines Motorgehäuses mit einem montierten Spulenkörper, Fig. 7 eine perspektivische Ansicht einer Kreiselpumpe mit einem geschnittenen Motorgehäuse und Spulenkörper und Fig. 8 eine perspektivische Ansicht einer Kreiselpumpe mit einer montierten Leiterplatte.6 is a partial perspective view of a motor housing with a mounted bobbin, Fig. 7 is a perspective view of a centrifugal pump with a cut motor housing and bobbin and Fig. 8 is a perspective view of a centrifugal pump with a mounted circuit board.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Wesentliche Bestandteile einer erfindungsgemäßen Kreiselpumpe 10 sind ein Pumpenspiralgehäuse 12 mit einem Einlassstutzen 102 und einem Auslassstutzen 104, ein Pumpenrad 28 und ein Elektromotor mit einem Motorgehäuse 14, einem Stator 34 und einem Spulenkörper 40 sowie mit einer Leiterplatte 94 und einem Elektronikdeckel 20. Das Motorgehäuse 14 ist aus Kunststoff gefertigt und topfförmig ausgebildet. Es besitzt zum Pumpenspiralgehäuse 12 hin einen Boden 13, der eine gemeinsame Gehäusewand zum einstückigen Pumpenspiralgehäuse 12 bildet. Nach außen schließt sich an den Boden 13 eine Außenwand 15 an, während im zentralen Bereich der Boden 13 eine Einstülpung aufweist, die von einem inneren Boden 17 und einer Trennwand 19 gebildet wird. Der Innenboden 17 besitzt in seiner Mitte eine Verdickung 18, in der eine Lagerachse 22 eingespritzt ist. Somit ist das Motorgehäuse 14 zum Pumpenspiralgehäuse 12 hin hermetisch abgeschlossen. Auf der Lagerachse 22 ist ein Rotor 36 mittels eines eingespritzten Lagers 30 drehbar um eine Rotationsachse 29 gelagert. Stirnseitig ist an dem Rotor 36 das Pumpenlaufrad 28 angeformt, das axial in das Pumpenspiralgehäuse 12 hineinragt und radial vom Einlassstutzen 102 zum Auslassstutzen 104 durchströmt wird. Die Rotationsachse des Pumpenlaufrads 28 ist mit 37 bezeichnet. Der Rotor 36 und das Pumpenrad 28 sind axial auf der Lagerachse 22 zwischen der Verdickung 18 und einem Anlaufpilz 24 gesichert, an dem das Lager 30 axial anläuft. Der Anlaufpilz 24 wird über das freie Ende der Lagerachse 22 geschoben und verrastet in einem Einstich 32, wobei der Anlaufpilz 24 eine nicht näher dargestellte Verdrehsicherung aufweist. Die zum Einlaufstutzen 102 weisende Außenkontur des Anlaufpilzes 24 ist so gestaltet, dass sich eine günstige Anströmung des Pumpenrads 28 ergibt.Essential components of a centrifugal pump 10 according to the invention are a pump volute casing 12 with an inlet connection 102 and an outlet connection 104, a pump impeller 28 and an electric motor with a motor housing 14, a stator 34 and a bobbin 40 and with a circuit board 94 and an electronics cover 20. The motor housing 14 is made of plastic and cup-shaped. It has the pump spiral housing 12 toward a bottom 13, which forms a common housing wall to the one-piece pump spiral housing 12. To the outside adjoins the bottom 13 an outer wall 15, while in the central region of the bottom 13 has an invagination, which is formed by an inner bottom 17 and a partition 19. The inner bottom 17 has in its center a thickening 18, in which a bearing axis 22 is injected. Thus, the motor housing 14 is hermetically sealed to the pump volute casing 12. On the bearing axis 22, a rotor 36 is mounted rotatably about an axis of rotation 29 by means of an injected bearing 30. The end face of the rotor 36, the pump impeller 28 is formed, which projects axially into the pump volute casing 12 and is flowed through radially from the inlet port 102 to the outlet port 104. The axis of rotation of the pump impeller 28 is denoted by 37. The rotor 36 and the impeller 28 are axially secured on the bearing axis 22 between the thickening 18 and a run-up mushroom 24, at which the bearing 30 starts axially. The starting mushroom 24 is pushed over the free end of the bearing shaft 22 and locked in a groove 32, wherein the starting mushroom 24 has an anti-rotation, not shown. The outer contour of the starting mushroom 24 facing the inlet connection 102 is designed in such a way that a favorable inflow of the impeller 28 results.
Das Pumpenspiralgehäuse 12 wird nach Art einesThe pump volute casing 12 is a kind of
Bajonettverschlusses mit dem Motorgehäuse 14 verbunden, indem radiale Vorsprünge 74 am Umfang des Motorgehäuses 14 axial zwischen entsprechende Hinterschnitte 78 des Spiralpumpengehäuses 12 durchgeschoben werden und durch Drehen des Pumpenspiralgehäuses 12 um einen Winkel von ca. 15° relativ zum Motorgehäuse 14 die Vorsprünge 74 hinter die Hinterschnitte 78 gelangen. Vor der Drehbewegung wird auf einen zwischen dem Spiralgehäuse 12 und dem Boden 13 des Motorgehäuses 14 angeordneten Dichtring 72 in Form eines O- Rings eine axiale Kraft ausgeübt. Ein in Umfangsrichtung am Umfang des Motorgehäuses 14 angeordneter Rasthaken 80 verrastet in der Endposition mit einem Anschlag 82 am Pumpenspiralgehäuse 12, sodass das Motorgehäuse 14 gegenüber dem Pumpenspiralgehäuse 12 auch in Umfangsrichtung fixiert ist.Bajonettverschlusses connected to the motor housing 14 by radial projections 74 on the circumference of the motor housing 14 are pushed axially between corresponding undercuts 78 of the spiral pump housing 12 and by rotating the pump spiral housing 12 by an angle of about 15 ° relative to the motor housing 14, the projections 74 behind the undercuts 78 arrive. Before the rotational movement, an axial force is exerted on a sealing ring 72 arranged between the volute casing 12 and the bottom 13 of the motor housing 14 in the form of an O-ring. A arranged in the circumferential direction on the circumference of the motor housing 14 latch hook 80 locked in the final position with a stop 82 on the pump spiral housing 12, so that the motor housing 14 is fixed relative to the pump spiral housing 12 in the circumferential direction.
In den ringförmigen Zwischenraum zwischen der Außenwand 15 und der Trennwand 19 des Motorgehäuses 14 ist ein Spulenkörper 40 des Stators 34 eingesetzt. Er wird mit dem Motorgehäuse 14 nach Art eines Bajonettverschlusses verbunden, indem Vorsprünge 56 am Umfang einer Stirnwand 41 des Spulenkörpers 40 zwischen entsprechende Hinterschnitte 62 am Motorgehäuse 14 hindurchgeschoben werden und durch eine Rechtsdrehung um ca. 40° hinter die Hinterschnitte 62 gelangen und so den Stator 34 mit dem Spulenkörper 40 im Motorgehäuse 14 befestigen. Durch mindestens eine Codierung 64, vorteilhafterweise durch drei Codierungen, ist nur eine Montageposition möglich. Der Spulenkörper 40 besitzt im Bereich seines Vorsprungs 56 einen Rasthaken 58, der als Verdrehsicherung dient und in der Endposition des Spulenkörpers 40 in einen Einschnitt 66 des Motorgehäuses 14 einrastet (Fig. 6) . Bei der Montage wird der Rasthaken 58 durch die nach außen konisch divergierende Innenseite der Außenwand 15 des Motorgehäuses 14 vorgespannt.In the annular space between the outer wall 15 and the partition wall 19 of the motor housing 14 is a bobbin 40th of the stator 34 used. It is connected to the motor housing 14 in the manner of a bayonet closure by protrusions 56 are pushed along the circumference of an end wall 41 of the bobbin 40 between corresponding undercuts 62 on the motor housing 14 and reach by a clockwise rotation about 40 ° behind the undercuts 62 and so the stator 34 with the bobbin 40 in the motor housing 14 fasten. By at least one coding 64, advantageously by three codes, only one mounting position is possible. The bobbin 40 has in the region of its projection 56 a latching hook 58, which serves as anti-rotation and in the end position of the bobbin 40 in a recess 66 of the motor housing 14 engages (Fig. 6). During assembly, the latching hook 58 is biased by the outwardly conically diverging inside of the outer wall 15 of the motor housing 14.
Um die Trennwand 19 und den Boden 17 des Motorgehäuses 14, die vom Förderdruck der Kreiselpumpe 10 belastet sind, möglichst dünn auslegen zu können, wodurch der Abstand zwischen dem Rotor 36 und dem Stator 34 geringer wird, stützt derTo the partition 19 and the bottom 17 of the motor housing 14, which are loaded by the delivery pressure of the centrifugal pump 10 to interpret as thin as possible, whereby the distance between the rotor 36 and the stator 34 is lower, supports the
Spulenkörper 40 diese Bereich ab und überträgt die Kräfte auf kurzem Wege als Zugkräfte über seine Vorsprünge 56 auf die Hinterschnitte 62 des Motorgehäuses 14. Der Spulenkörper 40 verhindert ebenfalls, dass sich die Trennwand 19 verlängert, wodurch sich die Position der Elektronik, insbesondere eine Leiterplatte 94, in Axialrichtung verlagern würde.Spool 40 from this area and transmits the forces in a short way as tensile forces on its projections 56 on the undercuts 62 of the motor housing 14. The bobbin 40 also prevents the partition wall 19 extends, resulting in the position of the electronics, in particular a printed circuit board 94th would shift in the axial direction.
Der Spulenkörper 40 ist im Bereich des Ringraums zwischen der Trennwand 19 und der Außenwand 15 zwischen seiner Stirnwand 41 und dem Boden 13 des Motorgehäuses 14 mit einem Kupferlackdraht 52 bewickelt, dessen Enden in Stützpunkten 42, 44, 46 an der dem Elektronikdeckel 20 zugewandten Seite der Stirnwand 41 des Spulenkörpers 40 abgelegt sind. Die vom Kupferlackdraht 52 gebildete Spule ist in einem radial offenen Ringraum des Spulenkörpers 40 untergebracht. Der Ringraum ist von einem Rückschlussring 38 verschlossen, der mit Pressung auf den Spulenkörper 40 aufgeschoben wird und Jochteile 39 kontaktiert, die im Bereich der Spule in den Spulenkörper 40 eingespritzt sind.The bobbin 40 is in the region of the annular space between the partition wall 19 and the outer wall 15 between its end wall 41st and the bottom 13 of the motor housing 14 wound with a copper enamel wire 52, the ends of which are stored in support points 42, 44, 46 on the electronics cover 20 side facing the end wall 41 of the bobbin 40. The coil formed by the copper enamel wire 52 is housed in a radially open annular space of the bobbin 40. The annular space is closed by a return ring 38 which is pushed onto the bobbin 40 with pressure and contacts yoke parts 39, which are injected into the bobbin 40 in the area of the coil.
Am Spulenkörper 40 ist ein Hallsensor 98 vorgesehen, der in eine Tasche 60 des Spulenkörpers 40 eingesetzt ist, wobei seine vorgebogenen Pins 54 in einem Stützpunkt 44 abgelegt werden. Die Lage des Hallsensors 98 kann durch einenOn the bobbin 40, a Hall sensor 98 is provided, which is inserted into a pocket 60 of the bobbin 40, wherein its pre-bent pins 54 are stored in a base 44. The location of the Hall sensor 98 can by a
Klebepunkt gesichert werden. Die Enden des Kupferlackdrahts 52 sowie die Pins 54 werden durch Schneidklemmen 48 kontaktiert, die in die zugehörigen Stützpunkte 42, 44 eingepresst werden. Die Schneidklemme 48, die dem Stützpunkt 46 zugeordnet ist, hat lediglich Haltefunktionen, um die Leiterplatte 94 biegefrei an den Stützpunkten zu befestigen. Die Schneidklemmen 48 besitzen an ihren freien Enden Einpresskontakte 86. Auf diese wird nun die Leiterplatte 94 aufgepresst und ihre Leiterbahnen werden kontaktiert. Hierdurch werden alle notwendigen elektrischen Verbindungen zur Elektronik hergestellt. In der Leiterplatte 94 sind ferner Steckerpins 88 für den Anschlussstecker in Lot- oder Einpresstechnik vormontiert. Der Elektronikdeckel 20 wird mit einem vormontierten O-Ring 96 an seinem Umfang in das offene Ende des Motorgehäuses 14 geschoben, wobei der O-Ring 96 durch die konisch nach außen divergierende Innenseite der Außenwand 15 zusammengedrückt wird. Der Elektronikdeckel 20 besitzt über seinen Umfang verteilt Rasthaken 92, die radial nachgiebig sind und in der Endposition des Elektronikdeckels 20 in Aussparungen 16 des Motorgehäuses 14 einrasten. Zur leichteren Montage sind an der Innenseite des Elektronikdeckels 20 Stifte 90 angespritzt, die in Vorzentrierhülsen 50 gleiten. Diese sind an demGlue point to be secured. The ends of the enameled copper wire 52 and the pins 54 are contacted by insulation displacement terminals 48, which are pressed into the associated support points 42, 44. The insulation displacement terminal 48, which is assigned to the support point 46, has only holding functions in order to fasten the printed circuit board 94 without bending at the support points. The insulation displacement terminals 48 have press-fit contacts 86 at their free ends. The printed circuit board 94 is then pressed onto them and their printed conductors are contacted. As a result, all the necessary electrical connections to the electronics are made. In the circuit board 94 connector pins 88 are also pre-assembled for the connector in soldering or press-fitting. The electronics cover 20 is pushed with its preassembled O-ring 96 at its periphery into the open end of the motor housing 14, wherein the O-ring 96 is compressed by the conically outwardly diverging inside of the outer wall 15. The electronics cover 20 has distributed over its circumference locking hooks 92 which are radially resilient and engage in the end position of the electronics cover 20 in recesses 16 of the motor housing 14. For ease of assembly 20 pins 90 are molded onto the inside of the electronics cover, which slide in Vorzentrierhülsen 50. These are on the
Spulenkörper 40 angespritzt. Der Elektronikdeckel 20 besitzt Durchbrüche mit einer eingespritzten Dichtung 26, durch die die Steckerpins 88 der Leiterplatte 94 geschoben werden. Damit die Leiterplatte 94 dabei nicht auf Biegung beansprucht wird, sind im Bereich der Steckerpins 88 Stützpunkte 100 an demSpool 40 molded. The electronics cover 20 has openings with an injected seal 26 through which the connector pins 88 of the circuit board 94 are pushed. So that the printed circuit board 94 is not subjected to bending, 88 support points 100 are in the area of the connector pins
Spulenkörper 40 vorgesehen, an denen sich die Leiterplatte 94 abstützt. Bei Längenänderungen durch Innendruck oder Wärmedehnung der Bauteile können diese durch Verschieben der Steckerpins 88 durch die angespritzte Dichtung 26 auf die Steckverbindung weitergegeben werden, ohne dass eine große Kraft auf die elektrischen Verbindungen der Leiterplatte 20 ausgeübt wird. Coil bobbin 40 is provided, on which the circuit board 94 is supported. In the case of changes in length due to internal pressure or thermal expansion of the components, these can be passed on to the connector by displacing the connector pins 88 through the molded-on seal 26, without a large force being exerted on the electrical connections of the printed circuit board 20.
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/997,958 US20080219839A1 (en) | 2005-08-22 | 2006-07-05 | Centrifugal Pump |
| EP06764066A EP1920159A1 (en) | 2005-08-22 | 2006-07-05 | Centrifugal pump |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005039557.0 | 2005-08-22 | ||
| DE102005039557A DE102005039557A1 (en) | 2005-08-22 | 2005-08-22 | rotary pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007023014A1 true WO2007023014A1 (en) | 2007-03-01 |
Family
ID=36954288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2006/063908 Ceased WO2007023014A1 (en) | 2005-08-22 | 2006-07-05 | Centrifugal pump |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20080219839A1 (en) |
| EP (1) | EP1920159A1 (en) |
| KR (1) | KR20080034961A (en) |
| DE (1) | DE102005039557A1 (en) |
| WO (1) | WO2007023014A1 (en) |
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- 2006-07-05 EP EP06764066A patent/EP1920159A1/en not_active Withdrawn
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| WO2008012130A1 (en) * | 2006-07-25 | 2008-01-31 | Robert Bosch Gmbh | Fluid pump and method for producing a fluid pump |
| US9225221B2 (en) | 2008-04-19 | 2015-12-29 | Grundfos Management A/S | Stator housing assembly for a canned motor |
| EP2110928B2 (en) † | 2008-04-19 | 2016-06-01 | Grundfos Management A/S | Stator housing components for a canned motor |
| JP2011106446A (en) * | 2009-11-19 | 2011-06-02 | Hyundai Motor Co Ltd | Electric water pump |
| EP3087277B1 (en) | 2013-11-29 | 2018-04-18 | FTE automotive GmbH | Electric motor driven fluid pump, in particular for the forced lubrication of a manual transmission of a motor vehicle |
| EP3087277B2 (en) † | 2013-11-29 | 2021-10-27 | FTE automotive GmbH | Electric motor driven fluid pump, in particular for the forced lubrication of a manual transmission of a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080034961A (en) | 2008-04-22 |
| US20080219839A1 (en) | 2008-09-11 |
| EP1920159A1 (en) | 2008-05-14 |
| DE102005039557A1 (en) | 2007-03-01 |
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