EP1134419A2 - Centrifugal pump with cooled electronic unit - Google Patents

Centrifugal pump with cooled electronic unit Download PDF

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Publication number
EP1134419A2
EP1134419A2 EP01106106A EP01106106A EP1134419A2 EP 1134419 A2 EP1134419 A2 EP 1134419A2 EP 01106106 A EP01106106 A EP 01106106A EP 01106106 A EP01106106 A EP 01106106A EP 1134419 A2 EP1134419 A2 EP 1134419A2
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
electronics unit
profile
pump according
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.)
Granted
Application number
EP01106106A
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German (de)
French (fr)
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EP1134419B1 (en
EP1134419A3 (en
Inventor
Stephan Schreckenberg
Waldemar Stephan
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Wilo SE
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Wilo GmbH
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Filing date
Publication date
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Publication of EP1134419A2 publication Critical patent/EP1134419A2/en
Publication of EP1134419A3 publication Critical patent/EP1134419A3/en
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Publication of EP1134419B1 publication Critical patent/EP1134419B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—Mechanical details of the pump control unit
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit

Definitions

  • the invention relates to a centrifugal pump driven by an electric motor is that of an on the end facing away from the pump chamber of the electric motor arranged electronics unit is controlled, the Electric motor has at least one delivery channel through which the funded Liquid for cooling the electronics unit from the pump chamber to the electronics unit is guided.
  • Such a pump is for example from the German published application DE 196 24 145 known.
  • This pump has one surrounding the motor Outer jacket, which is flowed through by the liquid for cooling.
  • the liquid flows through the outer jacket to the engine compartment and the metal casing cover, which closes the outer casing and which its outer edge lies against the cooling outer jacket.
  • the housing cover separates the electronics unit from the outer jacket and forms a heat sink for releasing those generated by electronic components Heat to the fluid in the outer jacket.
  • the object of the invention is therefore a structurally simple, inexpensive Centrifugal pump of the type mentioned which can be manufactured and is easy to handle Art to create, which has small external dimensions and an optimal Cooling of all components of the electronics unit guaranteed.
  • the electric motor has at least two delivery channels has that of different pressure ranges of the pump on the one hand as a high-pressure delivery channel and on the other hand as a low-pressure delivery channel Electronics unit are guided, and that at least one cooling channel through the Electronics unit is passed, which to the two feed channels is connected that the liquid led to the electronics unit Flows through electronics unit.
  • the main advantage here is that the coolant not only up to the electronics unit is brought up, but that it is through the electronics unit flows through. In this way, additional areas for Heat transfer from electronic components to the cooling duct or to those in it flowing coolant created.
  • the two delivery channels can be outside or inside the housing of the Electric motor can be arranged, both being a smaller one in both cases Space requirements as well as a lower weight than with an electric motor completely surrounding outer jacket is reached. They range from Areas where the pumped liquid is in operation has different pressure, for example directly on the pump chamber or may lie on the intake and discharge ports. In this way is a continuous exchange of the cooling liquid and thus one high cooling effectiveness guaranteed.
  • the pump according to the invention is easy to handle with a simple construction and inexpensive to manufacture.
  • the cooling duct has a flat cooling gap is formed, since this is a particularly large and particularly with boards suitable surface for heat transfer is available.
  • the cooling gap has a rectangular cross section having.
  • several small cooling channels in one plane, in particular parallel to each other arranged and each with both the high-pressure delivery channel and the Low pressure delivery channel are connected. It is also possible in the electronics unit several cooling channels in different directions and / or in different Arrange levels.
  • the Electronics unit has at least one circuit board with electrical components, which is arranged such that the axis of the electric motor is at least approximately runs in the plane of the board or in a plane parallel to it.
  • the board can be so narrow in the required longitudinal extent be carried out that the electronics unit or that surrounding the electronics unit Housing does not protrude laterally over the housing of the electric motor.
  • a particularly good cooling performance can be achieved in that the Cooling gap runs parallel to the circuit board at a short distance.
  • the electronics unit has two boards, which are parallel to each other on the two side surfaces of the cooling border the gap. In this way, with high cooling effectiveness Size, in particular the length of the electronics unit further reduced become.
  • the board of the arrangement described above is shown in. divided into two halves, each correspondingly smaller than the original one Overall board are.
  • the motor housing and the housing of the electronics unit through a continuous round or polygonal continuous casting profile, within which at least two in Profile channels extending in the longitudinal direction are designed as delivery channels are connected to the pump chamber.
  • a continuous casting profile can be particularly inexpensive by extrusion or extrusion be made of light metal.
  • the motor housing is replaced by a rectangular, preferably square continuous profile is formed, in the Corners each formed a profile channel extending in the longitudinal direction is.
  • each formed a profile channel extending in the longitudinal direction is.
  • a rectangular one Continuous casting profile combines the advantages of a particularly simple way compact and small design with integrated delivery channels.
  • a particularly preferred continuous casting profile has at least essentially one square outer wall with a round one contained therein Inner wall, the inner wall in the middle area is formed in the four side walls of the outer wall that in the a profile channel is formed at four corners.
  • connections between two adjacent profile channels can particularly easy through recesses or interruptions in the inner, in particular round-shaped wall area of the continuous casting profile be educated. Such recesses or interruptions can be particularly easy in the inner areas of the side walls be milled in.
  • the cooling channel is transverse to one side opposite side of a collar that extends to the one Continuous casting profile or the housing of the electronics unit at the end Lid is formed and so in the interior of the Extends into the housing that it seals on the inner walls and with the ends of the cooling channel at the recesses or breaks rests in the inner wall area of the continuous casting profile.
  • the centrifugal pump 1 shown in FIG. 1 is driven by an electric motor 2 driven, the one facing away from the pump chamber 3 Front end of the electric motor arranged electronics unit 4 is controlled.
  • the Centrifugal pump 1 has a pump housing 5 in the form of a spiral housing a central intake 6 and a tangentially extending Pressure port 8 on.
  • the electric motor 2 is designed here as a dry-running motor, the rotor 9 and the stator 10 by a motor shaft carrying the pump impeller 11 12 penetrated first transverse wall 13 separated from the pump housing 5 is.
  • the transverse wall 13 is not present, so that the rotor 9 and the stator 10 through a free area of the pump housing 5 is separated.
  • the motor housing 14 is formed by an extruded profile 15, which in cross section an essentially square-shaped outer wall 16 with a contained therein circular-shaped inner wall 17, which in the middle areas 18 of the four side walls of the continuous casting profile 15 to the square outer wall 16 is formed. This is in the four corners of the continuous casting profile 15 between the outer wall 16 and the inner wall 17 each have a longitudinally extending profile channel 19.
  • the pump housing 5 At the end facing the electric motor 2 is the pump housing 5 with a coaxially projecting collar 20 with a recessed therein Sealing ring 21 into the continuous casting section 15 forming the motor housing 14 used.
  • the continuous casting profile 15 On the other end of the electric motor 2 is the continuous casting profile 15 to a housing 22 accommodating the electronics unit 4 extended.
  • the housing 22 for the electronics unit 4 is at its free End closed by a cover 23 which has a coaxial collar 24 has a sealing ring 25 in a sealed manner on the inside the round inner wall 17 abuts.
  • Below the collar 24 is a second one Transverse wall 26 inserted into the continuous casting section 15, which the electric motor 2nd separates from the electronics unit 4.
  • the Cross wall 26 does not exist, so that the electric motor 2 by a free Area is separated from the electronics unit 4.
  • the housing 22 for the Electronics unit 4 is thus in one piece and with the same external dimensions designed as the motor housing 14.
  • the four edges of the outer wall 16 of the continuous casting profile 15 are beveled, to each be able to accommodate a tie rod 7, which the entire device from the pump housing 5 to which the electronics unit final cover 23 holds together under tension.
  • a motor axis 27 containing and web 28 extending transversely along a diameter formed, which is plate-shaped over the entire longitudinal extent of the Electronics unit 4 extends.
  • a motor axis 27 containing and web 28 extending transversely along a diameter formed, which is plate-shaped over the entire longitudinal extent of the Electronics unit 4 extends.
  • the cooling channel 30 runs along the Diameter of the collar 24 and opens at both ends in the outer Shell surface of the collar 24.
  • the cooling channel 30 has almost the same thickness as the web 28 so that the wall areas separating it from the boards 29 of the Web 28 are only very thin. This way is a special one good heat transfer from the components arranged on the circuit boards to the guaranteed by the cooling channel 30 flowing cooling liquid.
  • the cooling duct 30 extends in the axial direction or in the longitudinal direction at least over the areas of the boards 29, the heat-generating components contain.
  • the cover 23 and thus also the web 28 is made just like that Continuous casting profile 15 made of aluminum, so that a particularly good thermal conductivity given is.
  • the lid 23 has a central opening through a plastic sprue 31 or is sealed by a sealing compound.
  • a sealing compound 31 In the sealing compound 31 is a connector 32 with contacts 33 for connection the electronics unit 4 cast.
  • the contacts 33 are with the on two boards 29 arranged components through which the plastic gate 31 electrically connected through.
  • Both in the area of the first transverse wall 13 and the collar 20 of the pump housing 5 and over the entire axial extent of the collar 24 of the Cover 23 are the two profile channels 19a each by an interruption 34a of the inner wall 17 connected to one another transversely.
  • an interruption 34b of the inner wall 17 is connected transversely to one another.
  • the interruptions 34a, 34b can be carried out in a particularly simple manner Milling away a narrow extending parallel to the outer wall 16 Area of the inner wall 17 can be obtained.
  • At both ends of the Profile channels 19a, 19b form the interruptions 34a, 34b collecting spaces, through the liquid from a profile channel 19a or 19b to the associated one second profile channel 19a or 19b can flow.
  • the cooling channel 30 opens into a respective one on both sides Interruption 34a or 34b forming a collecting space.
  • the pump housing 5 has two different pressure ranges Pump chamber 3 outgoing connecting channels 35a and 35b, which in the Interruptions 34a and 34b arranged on the pump housing 5 open out.
  • the connecting channel 35a extends from an area higher Pressure of the pump chamber 3 up to the break 34a, whereas the connection channel 35b from an area of the pump chamber 3 with less Pressure extends to the break 34b.
  • the two profile channels 19a together with the connecting channel 35a serve as a high-pressure delivery channel
  • the two profile channels 19b together with the connecting channel 35b function as a low-pressure delivery channel.
  • a small proportion of the delivered liquid flows as cooling liquid to the interruption 34a arranged on the electronics unit 4, from there through the cooling channel 30 into the opposite interruption 34b and then through the low-pressure delivery channel 19b, 35b back into the pump chamber 3 to flow back.
  • This cooling water flow which flows continuously when the centrifugal pump 1 is in operation, optimally cools the electronics unit 4 and causes only very low losses in efficiency.

Abstract

The pump (1) is driven by an electric motor (2) controled by an electronic unit (4) on the end of the motor remote from the pump chamber. The motor has at least two feed channels (35a,35b) leading from different pressure areas of the pump as high and low pressure channels connected to a cooling channel (30) passing through the electronic unit so that cooling liquid flows through the unit.

Description

Die Erfindung betrifft eine Kreiselpumpe, die von einem Elektromotor angetrieben ist, der von einer an der von der Pumpenkammer abgewandten Stirnseite des Elektromotors angeordneten Elektronikeinheit gesteuert ist, wobei der Elektromotor mindestens einen Förderkanal aufweist, durch den die geförderte Flüssigkeit zur Kühlung der Elektronikeinheit von der Pumpenkammer bis zu der Elektronikeinheit geführt ist.The invention relates to a centrifugal pump driven by an electric motor is that of an on the end facing away from the pump chamber of the electric motor arranged electronics unit is controlled, the Electric motor has at least one delivery channel through which the funded Liquid for cooling the electronics unit from the pump chamber to the electronics unit is guided.

Eine derartige Pumpe ist beispielsweise aus der deutschen Offenlegungsschrift DE 196 24 145 bekannt. Diese Pumpe weist hier einen den Motor umgebenden Außenmantel auf, der von der Förderflüssigkeit zur Kühlung durchflossen ist. Durch den Außenmantel fließt die Flüssigkeit bis zu einem den Motorenraum und den Außenmantel abschließenden Gehäusedeckel aus Metall, der mit seinem äußeren Rand an dem kühlenden Außenmantel anliegt. Der Gehäusedeckel trennt dabei die Elektronikeinheit von dem Außenmantel ab und bildet eine Wärmesenke zur Abgabe der von Bauteilen der Elektronik erzeugten Wärme an die im Außenmantel sich befindende Förderflüssigkeit.Such a pump is for example from the German published application DE 196 24 145 known. This pump has one surrounding the motor Outer jacket, which is flowed through by the liquid for cooling. The liquid flows through the outer jacket to the engine compartment and the metal casing cover, which closes the outer casing and which its outer edge lies against the cooling outer jacket. The housing cover separates the electronics unit from the outer jacket and forms a heat sink for releasing those generated by electronic components Heat to the fluid in the outer jacket.

Durch den Außenmantel werden sowohl die Außenabmessungen als auch das Gewicht des Motors bzw. der Kreiselpumpe vergrößert. Außerdem ist ein optimaler Wärmeabtransport lediglich für die direkt an den Deckel angrenzenden Bauteile der Elektronikeinheit gewährleistet. Insbesondere bei aufwendigeren Elektronikeinheiten können die vom Gehäusedeckel entfernt liegenden elektronischen bzw. elektrischen Bauteile die entwickelte Wärme nur schlecht oder gar nicht an die nur bis an den Gehäusedeckel herangeführte Förderflüssigkeit abgeben. Auch ist ein kontinuierlicher Austausch der im Außenmantel sich befindenden Förderflüssigkeit nicht sichergestellt.Due to the outer jacket, both the outer dimensions and the Weight of the motor or the centrifugal pump increased. In addition, is a optimal heat dissipation only for those directly adjacent to the lid Components of the electronics unit guaranteed. Especially at More complex electronic units can be removed from the housing cover lying electronic or electrical components only the heat developed badly or not at all to the only up to the housing cover Dispense liquid. There is also a continuous exchange of ideas in the Conveying liquid located outside is not ensured.

Aufgabe der Erfindung ist es daher, eine konstruktiv einfache, preiswert herzustellende und leicht handhabbare Kreiselpumpe der eingangs genannten Art zu schaffen, die kleine Außenabmessungen aufweist und eine optimale Kühlung aller Bauteile der Elektronikeinheit gewährleistet.The object of the invention is therefore a structurally simple, inexpensive Centrifugal pump of the type mentioned which can be manufactured and is easy to handle Art to create, which has small external dimensions and an optimal Cooling of all components of the electronics unit guaranteed.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung nach Anspruch 1 gelöst. Wesentlich ist dabei, daß der Elektromotor mindestens zwei Förderkanäle aufweist, die von unterschiedlichen Druckbereichen der Pumpe einerseits als Hochdruckförderkanal und andererseits als Niederdruckförderkanal zur Elektronikeinheit geführt sind, und daß mindestens ein Kühlkanal durch die Elektronikeinheit hindurchgeführt ist, der an die beiden Förderkanäle derart angeschlossen ist, daß die zur Elektronikeinheit geführte Flüssigkeit die Elektronikeinheit durchströmt.This object is achieved according to the invention by a device according to claim 1 solved. It is essential that the electric motor has at least two delivery channels has that of different pressure ranges of the pump on the one hand as a high-pressure delivery channel and on the other hand as a low-pressure delivery channel Electronics unit are guided, and that at least one cooling channel through the Electronics unit is passed, which to the two feed channels is connected that the liquid led to the electronics unit Flows through electronics unit.

Der Hauptvorteil besteht hierbei darin, daß die Kühlflüssigkeit nicht nur bis an die Elektronikeinheit heran geführt ist, sondern daß sie durch die Elektronikeinheit hindurch fließt. Auf diese Weise werden zusätzliche Flächen zur Wärmeübertragung von Elektronikbauteilen an den Kühlkanal bzw. an die darin strömende Kühlflüssigkeit geschaffen.The main advantage here is that the coolant not only up to the electronics unit is brought up, but that it is through the electronics unit flows through. In this way, additional areas for Heat transfer from electronic components to the cooling duct or to those in it flowing coolant created.

Die beiden Förderkanäle können außerhalb oder innerhalb des Gehäuses des Elektromotors angeordnet sein, wobei in beiden Fällen sowohl ein geringerer Platzbedarf als auch ein geringeres Gewicht als bei einem den Elektromotor vollständig umgebenden Außenmantel erreicht wird. Sie erstrecken sich von Bereichen, in denen beim Betrieb der Pumpe die geförderte Flüssigkeit unterschiedlichen Druck hat, die beispielsweise direkt an der Pumpenkammer oder am Ansaugstutzen und am Druckstutzen liegen können. Auf diese Weise ist ein kontinuierlicher Austausch der kühlenden Flüssigkeit und somit eine hohe Kühleffektivität gewährleistet.The two delivery channels can be outside or inside the housing of the Electric motor can be arranged, both being a smaller one in both cases Space requirements as well as a lower weight than with an electric motor completely surrounding outer jacket is reached. They range from Areas where the pumped liquid is in operation has different pressure, for example directly on the pump chamber or may lie on the intake and discharge ports. In this way is a continuous exchange of the cooling liquid and thus one high cooling effectiveness guaranteed.

Die erfindungsgemäße Pumpe ist bei einfacher Konstruktion leicht handzuhaben und kostengünstig herzustellen.The pump according to the invention is easy to handle with a simple construction and inexpensive to manufacture.

Besonders vorteilhaft ist es, wenn der Kühlkanal durch einen flachen Kühlspalt gebildet ist, da hierbei eine besonders große und bei Platinen besonders geeignete Oberfläche für den Wärmeübergang zur Verfügung steht. Vorzugsweise wird vorgeschlagen, daß der Kühlspalt einen rechteckigen Querschnitt aufweist. In einer alternativen Ausführungsform ist es auch möglich, daß mehrere kleine Kühlkanäle in einer Ebene, insbesondere parallel zueinander angeordnet und jeweils sowohl mit dem Hochdruckförderkanal als auch mit dem Niederdruckförderkanal verbunden sind. Ferner ist es möglich, in der Elektronikeinheit mehrere Kühlkanäle in unterschiedlichen Richtungen und/oder in verschiedenen Ebenen anzuordnen.It is particularly advantageous if the cooling duct has a flat cooling gap is formed, since this is a particularly large and particularly with boards suitable surface for heat transfer is available. Preferably it is proposed that the cooling gap has a rectangular cross section having. In an alternative embodiment, it is also possible that several small cooling channels in one plane, in particular parallel to each other arranged and each with both the high-pressure delivery channel and the Low pressure delivery channel are connected. It is also possible in the electronics unit several cooling channels in different directions and / or in different Arrange levels.

Insbesondere bei komplexeren Elektronikeinheiten kann eine im Querschnitt besonders kleinbauende Bauweise dadurch erreicht werden, daß die Elektronikeinheit mindestens eine Platine mit elektrischen Bauteilen aufweist, die derart angeordnet ist, daß die Achse des Elektromotors zumindest annähernd in der Ebene der Platine oder in einer dazu parallelen Ebene verläuft. Die Platine kann hierbei in der erforderlichen Längserstreckung so schmal ausgeführt sein, daß die Elektronikeinheit bzw. das die Elektronikeinheit umgebende Gehäuse seitlich nicht über das Gehäuse des Elektromotors hervorsteht.Especially in the case of more complex electronic units, one can have a cross-section particularly small construction can be achieved in that the Electronics unit has at least one circuit board with electrical components, which is arranged such that the axis of the electric motor is at least approximately runs in the plane of the board or in a plane parallel to it. The board can be so narrow in the required longitudinal extent be carried out that the electronics unit or that surrounding the electronics unit Housing does not protrude laterally over the housing of the electric motor.

Eine besonders gute Kühlleistung kann dabei dadurch erreicht werden, daß der Kühlspalt in einem geringen Abstand parallel zu der Platine verläuft.A particularly good cooling performance can be achieved in that the Cooling gap runs parallel to the circuit board at a short distance.

In einer besonders bevorzugten Ausführungsform weist die Elektronikeinheit zwei Platinen auf, die parallel zueinander an die beiden Seitenflächen des Kühl' spaltes angrenzen. Auf diese Weise kann bei hoher Kühleffektivität die Baugröße, insbesondere die Länge der Elektronikeinheit weiter reduziert werden. Die Platine der vorhergehend beschriebenen Anordnung wird dabei in . zwei Hälften geteilt, die jeweils entsprechend kleiner als die ursprüngliche Gesamtplatine sind.In a particularly preferred embodiment, the electronics unit has two boards, which are parallel to each other on the two side surfaces of the cooling border the gap. In this way, with high cooling effectiveness Size, in particular the length of the electronics unit further reduced become. The board of the arrangement described above is shown in. divided into two halves, each correspondingly smaller than the original one Overall board are.

Besonders günstig ist es dabei, wenn die elektrischen bzw. elektronischen Bauteile der beiden Platinen untereinander und/oder mit einem außerhalb der Elektronikeinheit angeordneten Anschlußstecker elektrisch verbunden sind.It is particularly favorable if the electrical or electronic Components of the two boards with each other and / or with one outside the Electronics unit arranged connector are electrically connected.

In einer besonders bevorzugten Ausführungsform ist das Motorgehäuse und das Gehäuse der Elektronikeinheit durch ein durchgehendes rundes oder mehreckiges Stranggußprofil gebildet, innerhalb dessen mindestens zwei in Längsrichtung sich erstreckende Profilkanäle ausgebildet sind, die als Förderkanäle an die Pumpenkammer angeschlossen sind. Ein derartiges Stranggußprofil kann besonders kostengünstig durch Strangpressen oder Fließpressen aus Leichtmetall hergestellt werden.In a particularly preferred embodiment, the motor housing and the housing of the electronics unit through a continuous round or polygonal continuous casting profile, within which at least two in Profile channels extending in the longitudinal direction are designed as delivery channels are connected to the pump chamber. Such a continuous casting profile can be particularly inexpensive by extrusion or extrusion be made of light metal.

Besonders vorteilhaft ist es dabei, wenn das Motorgehäuse durch ein rechteckiges, vorzugsweise quadratisches Stranggußprofil gebildet ist, in dessen Ecken jeweils ein in Längsrichtung sich erstreckender Profilkanal ausgebildet ist. Dabei sind zwei einander benachbarte Profilkanäle zumindest im Bereich der Elektronikeinheit miteinander verbunden und als Hochdruckförderkanäle an den Kühlkanal angeschlossen, während die beiden anderen Profilkanäle zumindest im Bereich der Elektronikeinheit miteinander verbunden und als Niederdruckförderkanäle an den Kühlkanal angeschlossen sind. Ein rechteckiges Stranggußprofil vereint auf besonders einfache Weise die Vorteile einer kompakten und kleinbauenden Bauweise mit integrierten Förderkanälen.It is particularly advantageous if the motor housing is replaced by a rectangular, preferably square continuous profile is formed, in the Corners each formed a profile channel extending in the longitudinal direction is. There are two adjacent profile channels at least in the area the electronics unit connected to each other and as high-pressure delivery channels the cooling duct connected while the other two profile ducts connected to each other at least in the area of the electronics unit and as Low pressure delivery channels are connected to the cooling channel. A rectangular one Continuous casting profile combines the advantages of a particularly simple way compact and small design with integrated delivery channels.

Ein besonders bevorzugtes Stranggußprofil hat eine zumindest im wesentlichen quadratisch ausgebildete Außenwandung mit einer darin enthaltenen rund ausgebildeten Innenwandung, wobei die Innenwandung in dem mittleren Bereich derart in die vier Seitenwände der Außenwandung angeformt ist, daß in den vier Ecken jeweils ein Profilkanal ausgebildet ist. A particularly preferred continuous casting profile has at least essentially one square outer wall with a round one contained therein Inner wall, the inner wall in the middle area is formed in the four side walls of the outer wall that in the a profile channel is formed at four corners.

Die Verbindungen zwischen zwei einander benachbarten Profilkanälen können dabei besonders einfach durch Ausnehmungen oder Unterbrechungen im inneren, insbesondere rund ausgeformten Wandungsbereich des Stranggußprofils gebildet sein. Derartige Ausnehmungen oder Unterbrechungen können besonders einfach in die inneren Bereiche der seitlichen Wandungen hineingefräst werden.The connections between two adjacent profile channels can particularly easy through recesses or interruptions in the inner, in particular round-shaped wall area of the continuous casting profile be educated. Such recesses or interruptions can be particularly easy in the inner areas of the side walls be milled in.

Besonders vorteilhaft ist es dabei, wenn der Kühlkanal quer von einer Seite zur gegenüberliegenden Seite eines Kragens sich erstreckt, der an einem das Stranggußprofil bzw. das Gehäuse der Elektronikeinheit stirnseitig abschließenden Deckel ausgebildet ist und der sich derart in das Innere des Gehäuses hinein erstreckt, daß er abdichtend an den inneren Wandungen und mit den Enden des Kühlkanals an den Ausnehmungen oder Unterbrechungen im inneren Wandungsbereich des Stranggußprofils anliegt. Hierbei bilden die Ausnehmungen oder Unterbrechungen zwischen den Enden des Kühlkanals und den äußeren Wandungsbereichen des Stranggußprofils Sammelräume zum Austausch der Kühlflüssigkeit mit den beiden angrenzenden Profilkanälen.It is particularly advantageous if the cooling channel is transverse to one side opposite side of a collar that extends to the one Continuous casting profile or the housing of the electronics unit at the end Lid is formed and so in the interior of the Extends into the housing that it seals on the inner walls and with the ends of the cooling channel at the recesses or breaks rests in the inner wall area of the continuous casting profile. Here form the Recesses or breaks between the ends of the cooling channel and the outer wall areas of the continuous casting collecting spaces to exchange the coolant with the two adjacent profile channels.

Besonders vorteilhaft ist es ferner, wenn zwischen dem Elektromotor und der Elektronikeinheit eine Querwand in das Stranggußprofil eingesetzt ist. Dadurch kann der Motorraum in dichter Weise von der Elektronikeinheit getrennt sein, so daß der Elektromotor auch mit einem Naßläufer als Spaltrohr bzw. Spalttopfmotor ausgeführt sein kann.It is also particularly advantageous if between the electric motor and the Electronics unit a transverse wall is inserted into the continuous casting profile. Thereby the engine compartment can be tightly separated from the electronics unit, so that the electric motor also with a wet rotor as a canned or canned motor can be executed.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung und den in den Zeichnungen dargestellten Ausführungsbeispielen.Further advantages and features of the invention result from the following description and those shown in the drawings Embodiments.

Es zeigen

Figur 1:
Seitenansicht einer erfindungsgemäßen Kreiselpumpe
Figur 2:
Stirnansicht aus Richtung D von Figur 1
Figur 3:
Schnittansicht aus Richtung A-A in Figur 2
Figur 4:
Schnittansicht B-B aus Figur 1
Figur 5:
Schnittansicht C-C aus Figur 2
Show it
Figure 1:
Side view of a centrifugal pump according to the invention
Figure 2:
End view from direction D of Figure 1
Figure 3:
Sectional view from the direction AA in FIG. 2
Figure 4:
Sectional view BB from FIG. 1
Figure 5:
Sectional view CC from Figure 2

Die in Figur 1 dargestellte Kreiselpumpe 1 wird von einem Elektromotor 2 angetrieben, der von einer an der von der Pumpenkammer 3 abgewandten Stirnseite des Elektromotors angeordneten Elektronikeinheit 4 gesteuert ist. Die Kreiselpumpe 1 weist ein Pumpengehäuse 5 in Form eines Spiralgehäuses mit einem zentralen Ansaugstutzen 6 und einem sich tangential erstreckenden Druckstutzen 8 auf.The centrifugal pump 1 shown in FIG. 1 is driven by an electric motor 2 driven, the one facing away from the pump chamber 3 Front end of the electric motor arranged electronics unit 4 is controlled. The Centrifugal pump 1 has a pump housing 5 in the form of a spiral housing a central intake 6 and a tangentially extending Pressure port 8 on.

Der Elektromotor 2 ist hier als Trockenläufer-Motor ausgeführt, wobei der Rotor 9 und der Stator 10 durch eine von der das Pumpenlaufrad 11 tragenden Motorwelle 12 durchdrungenen ersten Querwand 13 von dem Pumpengehäuse 5 getrennt ist. In einer alternativen Ausführungsform ist die Querwand 13 nicht vorhanden, so daß der Rotor 9 und der Stator 10 durch einen freien Bereich von dem Pumpengehäuse 5 getrennt ist.The electric motor 2 is designed here as a dry-running motor, the rotor 9 and the stator 10 by a motor shaft carrying the pump impeller 11 12 penetrated first transverse wall 13 separated from the pump housing 5 is. In an alternative embodiment, the transverse wall 13 is not present, so that the rotor 9 and the stator 10 through a free area of the pump housing 5 is separated.

Das Motorgehäuse 14 ist durch ein Stranggußprofil 15 gebildet, das im Querschnitt eine im wesentlichen quadratisch geformte Außenwandung 16 mit einer darin enthaltenen kreisrund geformten Innenwandung 17 aufweist, die in den mittleren Bereichen 18 der vier Seitenwände des Stranggußprofils 15 an die quadratische Außenwandung 16 angeformt ist. Dadurch ist in den vier Ecken des Stranggußprofils 15 zwischen der Außenwandung 16 und der Innenwandung 17 jeweils ein in Längsrichtung verlaufender Profilkanal 19 ausgebildet.The motor housing 14 is formed by an extruded profile 15, which in cross section an essentially square-shaped outer wall 16 with a contained therein circular-shaped inner wall 17, which in the middle areas 18 of the four side walls of the continuous casting profile 15 to the square outer wall 16 is formed. This is in the four corners of the continuous casting profile 15 between the outer wall 16 and the inner wall 17 each have a longitudinally extending profile channel 19.

An dem der dem Elektromotor 2 zugewandten Ende ist das Pumpengehäuse 5 mit einem koaxial vorstehenden Kragen 20 mit einem darin eingelassenen Dichtungsring 21 in das das Motorgehäuse 14 bildende Stranggußprofil 15 eingesetzt. An der anderen Stirnseite des Elektromotors 2 ist das Stranggußprofil 15 zu einem die Elektronikeinheit 4 aufnehmenden Gehäuse 22 verlängert. Das Gehäuse 22 für die Elektronikeinheit 4 ist an seinem freien Ende durch einen Deckel 23 verschlossen, der einen koaxialen Kragen 24 aufweist, der über einen Dichtungsring 25 in dichter Weise an der Innenseite der runden Innenwandung 17 anliegt. Unterhalb des Kragens 24 ist eine zweite Querwand 26 in das Stranggußprofil 15 eingeschoben, die den Elektromotor 2 von der Elektronikeinheit 4 trennt. In einer alternativen Ausführungsform ist die Querwand 26 nicht vorhanden, so daß der Elektromotor 2 durch einen freien Bereich von der Elektronikeinheit 4 getrennt ist. Das Gehäuse 22 für die Elektronikeinheit 4 ist somit einstückig und mit den gleichen Außenabmessungen wie das Motorgehäuse 14 ausgebildet.At the end facing the electric motor 2 is the pump housing 5 with a coaxially projecting collar 20 with a recessed therein Sealing ring 21 into the continuous casting section 15 forming the motor housing 14 used. On the other end of the electric motor 2 is the continuous casting profile 15 to a housing 22 accommodating the electronics unit 4 extended. The housing 22 for the electronics unit 4 is at its free End closed by a cover 23 which has a coaxial collar 24 has a sealing ring 25 in a sealed manner on the inside the round inner wall 17 abuts. Below the collar 24 is a second one Transverse wall 26 inserted into the continuous casting section 15, which the electric motor 2nd separates from the electronics unit 4. In an alternative embodiment, the Cross wall 26 does not exist, so that the electric motor 2 by a free Area is separated from the electronics unit 4. The housing 22 for the Electronics unit 4 is thus in one piece and with the same external dimensions designed as the motor housing 14.

Die vier Kanten der Außenwandung 16 des Stranggußprofils 15 sind abgeschrägt, um jeweils einen Zuganker 7 aufnehmen zu können, der die gesamte Vorrichtung vom Pumpengehäuse 5 bis zu dem die Elektronikeinheit abschließenden Deckel 23 unter Zugspannung zusammenhält.The four edges of the outer wall 16 of the continuous casting profile 15 are beveled, to each be able to accommodate a tie rod 7, which the entire device from the pump housing 5 to which the electronics unit final cover 23 holds together under tension.

Innerhalb des Kragens 24 des Deckels 23 ist ein die Motorachse 27 enthaltender und entlang eines Durchmessers quer verlaufender Steg 28 ausgebildet, der sich plattenförmig über die gesamte Längsausdehnung der Elektronikeinheit 4 erstreckt. Auf beiden Seiten des Stegs 28 liegt jeweils eine Platine 29 an, auf denen jeweils einzelne elektrische bzw. elektronische Bauteile der Elektronikeinheit 4 angeordnet sind.Within the collar 24 of the cover 23 is a motor axis 27 containing and web 28 extending transversely along a diameter formed, which is plate-shaped over the entire longitudinal extent of the Electronics unit 4 extends. There is one on each side of the web 28 Board 29 on which each electrical or electronic components the electronics unit 4 are arranged.

Im Inneren des Steges 28 ist ein flacher Kühlspalt als Kühlkanal 30 mit rechteckigem Querschnitt ausgebildet. Der Kühlkanal 30 verläuft entlang des Durchmessers des Kragens 24 und mündet an beiden Enden in der äußeren Mantelfläche des Kragens 24. Der Kühlkanal 30 hat fast die gleiche Dicke wie der Steg 28, so daß die ihn von den Platinen 29 trennenden Wandbereiche des Steges 28 nur sehr dünn ausgebildet sind. Auf diese Weise ist ein besonders guter Wärmeübergang von den auf den Platinen angeordneten Bauteilen zu der durch den Kühlkanal 30 fließenden kühlenden Flüssigkeit gewährleistet. In axialer Richtung bzw. in Längsrichtung erstreckt sich der Kühlkanal 30 zumindest über die Bereiche der Platinen 29, die wärmeentwickelnde Bauteile enthalten. Der Deckel 23 und somit auch der Steg 28 besteht ebenso wie das Stranggußprofil 15 aus Aluminium, so daß eine besonders gute Wärmeleitfähigkeit gegeben ist.Inside the web 28 is a flat cooling gap as a cooling channel 30 with a rectangular one Cross section formed. The cooling channel 30 runs along the Diameter of the collar 24 and opens at both ends in the outer Shell surface of the collar 24. The cooling channel 30 has almost the same thickness as the web 28 so that the wall areas separating it from the boards 29 of the Web 28 are only very thin. This way is a special one good heat transfer from the components arranged on the circuit boards to the guaranteed by the cooling channel 30 flowing cooling liquid. In The cooling duct 30 extends in the axial direction or in the longitudinal direction at least over the areas of the boards 29, the heat-generating components contain. The cover 23 and thus also the web 28 is made just like that Continuous casting profile 15 made of aluminum, so that a particularly good thermal conductivity given is.

Der Deckel 23 weist eine zentrale Öffnung auf, die durch ein Kunststoffangußteil 31 oder durch eine Vergußmasse verschlossen ist. In die Vergußmasse 31 ist ein Anschlußstecker 32 mit Kontakten 33 zum Anschließen der Elektronikeinheit 4 eingegossen. Die Kontakte 33 sind mit den auf den beiden Platinen 29 angeordneten Bauteilen durch die das Kunststoffangußteil 31 hindurch elektrisch verbunden.The lid 23 has a central opening through a plastic sprue 31 or is sealed by a sealing compound. In the sealing compound 31 is a connector 32 with contacts 33 for connection the electronics unit 4 cast. The contacts 33 are with the on two boards 29 arranged components through which the plastic gate 31 electrically connected through.

Sowohl im Bereich der ersten Querwand 13 und des Kragens 20 des Pumpengehäuses 5 als auch über die gesamte axiale Erstreckung des Kragens 24 des Deckels 23 sind die beiden Profilkanäle 19a jeweils durch eine Unterbrechung 34a der Innenwandung 17 quer miteinander verbunden. In gleicher Weise sind die beiden Profilkanäle 19b in den gleichen axialen Bereichen jeweils durch eine Unterbrechung 34b der Innenwandung 17 quer miteinander verbunden. Die Unterbrechungen 34a, 34b können auf besonders einfache Weise durch Wegfräsen eines schmalen sich parallel zur Außenwandung 16 erstreckenden Bereichs der Innenwandung 17 erhalten werden. An beiden Enden der Profilkanäle 19a, 19b bilden die Unterbrechungen 34a, 34b Sammelräume, durch die Flüssigkeit von einem Profilkanal 19a bzw. 19b zum zugehörigen zweiten Profilkanal 19a bzw. 19b fließen kann. Im Bereich des Kragens 24 bzw. des Steges 28 mündet der Kühlkanal 30 an beiden Seiten in jeweils eine einen Sammelraum bildende Unterbrechung 34a bzw. 34b.Both in the area of the first transverse wall 13 and the collar 20 of the pump housing 5 and over the entire axial extent of the collar 24 of the Cover 23 are the two profile channels 19a each by an interruption 34a of the inner wall 17 connected to one another transversely. Are in the same way through the two profile channels 19b in the same axial areas an interruption 34b of the inner wall 17 is connected transversely to one another. The interruptions 34a, 34b can be carried out in a particularly simple manner Milling away a narrow extending parallel to the outer wall 16 Area of the inner wall 17 can be obtained. At both ends of the Profile channels 19a, 19b form the interruptions 34a, 34b collecting spaces, through the liquid from a profile channel 19a or 19b to the associated one second profile channel 19a or 19b can flow. In the area of the collar 24 or of the web 28, the cooling channel 30 opens into a respective one on both sides Interruption 34a or 34b forming a collecting space.

Das Pumpengehäuse 5 weist zwei von Bereichen unterschiedlichen Drucks der Pumpenkammer 3 ausgehende Verbindungskanäle 35a bzw. 35b auf, die in die am Pumpengehäuse 5 angeordneten Unterbrechungen 34a bzw. 34b münden. Der Verbindungskanal 35a erstreckt sich dabei von einem Bereich höheren Drucks der Pumpenkammer 3 bis zu der Unterbrechung 34a, wohingegen sich der Verbindungskanal 35b von einem Bereich der Pumpenkammer 3 mit geringerem Druck bis zu der Unterbrechung 34b erstreckt.The pump housing 5 has two different pressure ranges Pump chamber 3 outgoing connecting channels 35a and 35b, which in the Interruptions 34a and 34b arranged on the pump housing 5 open out. The connecting channel 35a extends from an area higher Pressure of the pump chamber 3 up to the break 34a, whereas the connection channel 35b from an area of the pump chamber 3 with less Pressure extends to the break 34b.

Wenn sich beim Betrieb der Kreiselpumpe 1 in der Pumpenkammer 3 die unterschiedlichen Druckbereiche der geförderten Flüssigkeit ausbilden, dienen die beiden Profilkanäle 19a zusammen mit dem Verbindungskanal 35a als Hochdruckförderkanal, während die beiden Profilkanäle 19b zusammen mit dem Verbindungskanal 35b als Niederdruckförderkanal fungieren. Über den Hochdruckförderkanal 35a, 19a fließ ein geringer Anteil der geförderten Flüssigkeit als Kühlflüssigkeit zu der an der Elektronikeinheit 4 angeordneten Unterbrechung 34a, um von hieraus durch den Kühlkanal 30 in die gegenüberliegende Unterbrechung 34b und anschließend durch den Niederdruckförderkanal 19b, 35b wieder in die Pumpenkammer 3 zurückzufließen.If, during operation of the centrifugal pump 1 in the pump chamber 3, the different pressure ranges of the liquid being conveyed form, the two profile channels 19a together with the connecting channel 35a serve as a high-pressure delivery channel, while the two profile channels 19b together with the connecting channel 35b function as a low-pressure delivery channel. Via the high-pressure delivery channel 35a, 19a, a small proportion of the delivered liquid flows as cooling liquid to the interruption 34a arranged on the electronics unit 4, from there through the cooling channel 30 into the opposite interruption 34b and then through the low-pressure delivery channel 19b, 35b back into the pump chamber 3 to flow back.

Dieser bei Betrieb der Kreiselpumpe 1 kontinuierlich fließende Kühlwasserstrom bewirkt eine optimale Kühlung der Elektronikeinheit 4 und verursacht nur sehr geringe Wirkungsgradverluste.This cooling water flow, which flows continuously when the centrifugal pump 1 is in operation, optimally cools the electronics unit 4 and causes only very low losses in efficiency.

Claims (14)

Kreiselpumpe, die von einem Elektromotor angetrieben ist, .der von einer an der von der Pumpenkammer abgewandten Stirnseite des Elektromotors angeordneten Elektronikeinheit gesteuert ist, wobei der Elektromotor mindestens einen Förderkanal aufweist, durch den die geförderte Flüssigkeit zur Kühlung der Elektronikeinheit von der Pumpenkammer bis zu der Elektronikeinheit geführt ist,
dadurch gekennzeichnet, daß der Elektromotor (2) mindestens zwei Förderkanäle (19a, 35a und 19b, 35b) aufweist, die von unterschiedlichen Druckbereichen der Kreiselpumpe (1) als Hochdruckförderkanal (19a, 35a) bzw. als Niederdruckförderkanal (19b, 35b) zur Elektronikeinheit (4) geführt sind, und daß mindestens ein Kühlkanal (30) durch die Elektronikeinheit (4) hindurch geführt ist, der an die beiden Förderkanäle (19a, 35a und 19b, 35b) derart angeschlossen ist, daß die zur Elektronikeinheit (4) geführte Flüssigkeit die Elektronikeinheit (4) durchströmt. Centrifugal pump which is driven by an electric motor, which is controlled by an electronic unit arranged on the end of the electric motor facing away from the pump chamber, the electric motor having at least one delivery channel through which the liquid conveyed for cooling the electronic unit from the pump chamber to the Electronics unit is guided,
characterized, that the electric motor (2) has at least two delivery channels (19a, 35a and 19b, 35b), which from different pressure ranges of the centrifugal pump (1) as a high-pressure delivery channel (19a, 35a) or as a low-pressure delivery channel (19b, 35b) to the electronics unit (4) are guided, and that at least one cooling channel (30) is passed through the electronics unit (4) and is connected to the two delivery channels (19a, 35a and 19b, 35b) in such a way that the liquid supplied to the electronics unit (4) flows through the electronics unit (4) . Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet , daß der Kühlkanal (30) durch einen flachen Kühlspalt mit vorzugsweise rechteckigem Querschnitt gebildet ist. Centrifugal pump according to claim 1, characterized in that the cooling channel (30) is formed by a flat cooling gap with a preferably rectangular cross section. Kreiselpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß die Elektronikeinheit (4) mindestens eine Platine (29) mit elektrischen bzw. elektronischen Bauteilen aufweist, die derart angeordnet ist, daß die Achse (27) des Elektromotors (2) zumindest annähernd in der Ebene der Platine (29) oder in einer dazu parallelen Ebene verläuft.Centrifugal pump according to claim 1 or 2, characterized in that the electronic unit (4) has at least one circuit board (29) with electrical or electronic components, which is arranged such that the axis (27) of the electric motor (2) at least approximately in the Level of the board (29) or in a plane parallel to it. Kreiselpumpe nach Anspruch 2 und 3, dadurch gekennzeichnet , daß der Kühlspalt (30) in einem geringen Abstand parallel zu der Platine (29) verläuft.Centrifugal pump according to claims 2 and 3, characterized in that the cooling gap (30) runs parallel to the plate (29) at a short distance. Kreiselpumpe nach Anspruch 4, dadurch gekennzeichnet , daß die Elektronikeinheit (4) zwei Platinen (29) aufweist, die an die beiden Seitenflächen des Kühlspaltes (30) angrenzen.Centrifugal pump according to Claim 4, characterized in that the electronics unit (4) has two boards (29) which adjoin the two side surfaces of the cooling gap (30). Kreiselpumpe nach Anspruch 5, dadurch gekennzeichnet , daß die elektrischen bzw. elektronischen Bauteile der beiden Platinen (29) untereinander und/oder mit einem außerhalb der Elektronikeinheit (4) angeordneten Anschlußstecker (32) elektrisch verbunden sind.Centrifugal pump according to Claim 5, characterized in that the electrical or electronic components of the two boards (29) are electrically connected to one another and / or to a connector plug (32) arranged outside the electronics unit (4). Kreiselpumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Förderkanäle (19a, 35a und 19b, 35b) innerhalb des Motorgehäuses (14) sowie insbesondere auch innerhalb des Pumpengehäuses (5) und/oder innerhalb des Gehäuses (22) der Elektronikeinheit (4) verlaufen. Centrifugal pump according to one of the preceding claims, characterized in that the delivery channels (19a, 35a and 19b, 35b) within the motor housing (14) and in particular also within the pump housing (5) and / or within the housing (22) of the electronics unit (4 ) run. Kreiselpumpe nach Anspruch 7, dadurch gekennzeichnet , daß das Motorgehäuse (14) und das Gehäuse (22) der Elektronikeinheit (4) durch ein durchgehendes rundes oder mehreckiges Stranggußprofil (15) gebildet sind, innerhalb dessen mindestens zwei in Längsrichtung sich erstreckende Profilkanäle (19a, 19b) ausgebildet sind, die als Förderkanäle an die Pumpenkammer (3) angeschlossen sind.Centrifugal pump according to claim 7, characterized in that the motor housing (14) and the housing (22) of the electronics unit (4) are formed by a continuous round or polygonal continuous casting profile (15), within which at least two profile channels (19a, 19) extending in the longitudinal direction 19b) are formed, which are connected to the pump chamber (3) as delivery channels. Kreiselpumpe nach Anspruch 8, dadurch gekennzeichnet , daß das Motorgehäuse (14) durch ein rechteckiges Stranggußprofil (15) gebildet ist, in dessen Ecken jeweils ein in Längsrichtung sich erstreckender Profilkanal (19) ausgebildet ist, wobei zwei einander benachbarte Profilkanäle (19a) zumindest im Bereich der Elektronikeinheit (4) miteinander verbunden und als Hochdruckförderkanäle an den Kühlkanal (30) angeschlossen sind, und wobei die beiden anderen Profilkanäle (19b) zumindest im Bereich der Elektronikeinheit (4) miteinander verbunden und als Niederdruckförderkanäle an den Kühlkanal (30) angeschlossen sind.Centrifugal pump according to Claim 8, characterized in that the motor housing (14) is formed by a rectangular continuous casting profile (15), in the corners of which a profile channel (19) extending in the longitudinal direction is formed, two adjacent profile channels (19a) at least in the The area of the electronics unit (4) is connected to one another and is connected to the cooling channel (30) as high-pressure delivery channels, and the two other profile channels (19b) are connected to one another at least in the area of the electronics unit (4) and are connected to the cooling channel (30) as low-pressure delivery channels . Kreiselpumpe nach Anspruch 9, dadurch gekennzeichnet, daß das Stranggußprofil (15) eine zumindest im wesentlichen quadratisch ausgebildete Außenwandung (16) mit einer darin enthaltenen zumindest im wesentlichen rund ausgebildeten Innenwandung (17) aufweist, wobei die Innenwandung (17) in den mittleren Bereichen (18) derart an die vier Seitenwände der Außenwandung (16) angeformt ist, daß in den vier Ecken jeweils ein Profilkanal (19a, 19b) ausgebildet ist.Centrifugal pump according to claim 9, characterized in that the continuous casting profile (15) has an at least substantially square outer wall (16) with an at least substantially round inner wall (17) contained therein, the inner wall (17) in the central areas ( 18) is formed on the four side walls of the outer wall (16) in such a way that a profile channel (19a, 19b) is formed in each of the four corners. Kreiselpumpe nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß die Verbindungen zwischen zwei einander benachbarten Profilkanälen (19a bzw. 19b) durch Ausnehmungen oder Unterbrechungen (34a, 34b) im inneren Wandungsbereich (17) des Stranggußprofils (15) gebildet sind. Centrifugal pump according to claim 9 or 10, characterized in that the connections between two adjacent profile channels (19a or 19b) are formed by recesses or interruptions (34a, 34b) in the inner wall region (17) of the continuous casting profile (15). Kreiselpumpe nach Anspruch 11, dadurch gekennzeichnet , daß der Kühlkanal (30) quer von einer Seite zur gegenüberliegenden Seite eines Kragens (24) sich erstreckt, der an einem das Stranggußprofil (15) bzw. das Gehäuse (22) der Elektronikeinheit (4) stirnseitig abschließenden Deckel (23) ausgebildet ist und der sich derart in das Innere des Gehäuses (22) hinein erstreckt, daß er abdichtend an den inneren Wandungen (17) und mit den Enden des Kühlkanals (30) an den Ausnehmungen oder Unterbrechungen (34a, 34b) im inneren Wandungsbereich (17) des Stranggußprofils (15) anliegt.Centrifugal pump according to Claim 11, characterized in that the cooling duct (30) extends transversely from one side to the opposite side of a collar (24) which on one end has the continuous casting profile (15) or the housing (22) of the electronics unit (4) closing cover (23) and which extends into the interior of the housing (22) in such a way that it seals on the inner walls (17) and with the ends of the cooling channel (30) on the recesses or interruptions (34a, 34b ) in the inner wall area (17) of the continuous casting profile (15). Kreiselpumpe nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet , daß zwischen den Elektromotor (2) und das Pumpengehäuse (5) eine erste Querwand (13) in das Stranggußprofil (15) eingesetzt ist.Centrifugal pump according to one of claims 8 to 12, characterized in that a first transverse wall (13) is inserted into the continuous casting profile (15) between the electric motor (2) and the pump housing (5). Kreiselpumpe nach einem der Ansprüche 8 bis 13, dadurch gekennzeichnet, daß zwischen den Elektromotor (2) und die Elektronikeinheit (4) eine zweite Querwand (26) in das Stranggußprofil (15) eingesetzt ist.Centrifugal pump according to one of Claims 8 to 13, characterized in that a second transverse wall (26) is inserted into the continuous casting profile (15) between the electric motor (2) and the electronic unit (4).
EP01106106A 2000-03-17 2001-03-13 Centrifugal pump with cooled electronic unit Expired - Lifetime EP1134419B1 (en)

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DE10013042A1 (en) 2001-09-20
DE50111661D1 (en) 2007-02-01
EP1134419B1 (en) 2006-12-20
EP1134419A3 (en) 2002-10-09

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