EP1260714A1 - Drive motor for submersible pump - Google Patents

Drive motor for submersible pump Download PDF

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Publication number
EP1260714A1
EP1260714A1 EP01112676A EP01112676A EP1260714A1 EP 1260714 A1 EP1260714 A1 EP 1260714A1 EP 01112676 A EP01112676 A EP 01112676A EP 01112676 A EP01112676 A EP 01112676A EP 1260714 A1 EP1260714 A1 EP 1260714A1
Authority
EP
European Patent Office
Prior art keywords
drive motor
inner housing
motor according
jacket
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
EP01112676A
Other languages
German (de)
French (fr)
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EP1260714B1 (en
Inventor
Lars Vestergaard Nielsen
Tom Jaeger
John Olsen
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Grundfos AS
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Grundfos AS
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Priority to EP01112676A priority Critical patent/EP1260714B1/en
Priority to DE50111547T priority patent/DE50111547D1/en
Publication of EP1260714A1 publication Critical patent/EP1260714A1/en
Application granted granted Critical
Publication of EP1260714B1 publication Critical patent/EP1260714B1/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—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
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • 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
    • F04D29/5806—Cooling the drive system
    • 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 an electric drive motor for a submersible centrifugal pump, according to the preamble of claim 1.
  • centrifugal pumps it is known in practice to use centrifugal pumps to pump waste water to install in a well or basin that the centrifugal pump is at least partially immersed in the waste water, in which case the waste water has reached its lowest level in the well. If the aggregate is the wastewater level usually completely immersed in the wastewater. If the electrical Drive motor of such pumps with a terminal box, which in known the electrical control parts for automatic Einund Switch off and contains for speed control of the drive motor, it must be ensured that the terminal box is waterproof so as not to damage the electrical control parts and to put out of function.
  • the sealing material which between the Inserted the lid and the rest of the body of the terminal box is, however, has a limited lifespan, so the tightness the terminal box is limited accordingly, which is why the aggressiveness of the wastewater to be pumped makes a decisive contribution.
  • the terminal box of such drive motors must therefore be relatively short time intervals for tightness are checked, the sealing material replace if necessary.
  • the maintenance cost for one Corresponding centrifugal pump unit are therefore relatively high.
  • the terminal box has been proposed trained as a separate unit by the centrifugal pump and to place this unit in one place in the well or basin, from the rising water level in the well or Pelvis is not reached.
  • the unit is then electrical Cable connected to the functionally installed centrifugal pump.
  • the Manufacturing such a separate unit is relatively expensive and it is not always a suitable place in the well for mounting the unit available.
  • the insulating material of the electrical, from the unit to the centrifugal pump connecting cable from be of special quality to withstand the aggressiveness of the waste water to be able to.
  • the object of the invention is to improve one for one a pumpable immersible centrifugal pump certain electrical Drive motor of the aforementioned type in that the electrical control means for operating the drive motor, in particular for its automatic switching on and off and if necessary for its speed control, are required, integrated in the engine and thus against harmful effects of the medium Centrifugal pump are permanently protected and that the drive motor is safely cooled even when the unit is installed dry.
  • the solution according to the invention eliminates the outside of the motor housing usually attached terminal box with the inside known control means contained or a separate unit with the control means in question, including a connecting cable, which is the separate unit with the electric drive motor combines. All control means are now - from the assembly room of the mains connection separately - in the annular space of the drive motor included, which is sealed against the external engine environment is that a harmful influence of the medium in which the Engine is optionally immersed on the sealing material of the Motors is not given.
  • the electrical control parts can be the most advantageous Places are arranged within the annulus, namely in addition to the possibility that a large number of control parts in the annular space can be accommodated, the control parts themselves not being necessary must have a miniature design. It also ensures that the heat loss from the motor is safely transferred to the pump flowing medium is derived. The heat loss is from the inner casing of the drive motor to the front end wall of the Drive motor directed, which in turn from the pumped medium is applied. At the same time, the inner housing also serves as a heat sink for the heat loss from the electrical control parts in the annulus mentioned, for example from the Power section of a frequency converter. The smooth surface of the unit reduces the risk of dirt accumulation.
  • Fig. 1 is a generally designated 1 motor pump unit shown, which consists of an electric drive motor 2 and a submersible Centrifugal pump 3 exists.
  • the drive motor and the centrifugal pump are together, for example, by a conventional clamping ring 4 firmly connected.
  • the drive motor has one in its end areas rotatably mounted drive shaft 5, a rotatably arranged thereon Rotor 6 and one radially opposite the rotor electric stator 7.
  • the stator 7 is in a housing of the Drive motor rotatably mounted, this housing a front End wall 8 includes with which the centrifugal pump 3 by means of Fastening ring 4 is connected.
  • the front end wall 8 consists of thermally conductive material and is facing the pump 3 Surface 8a is acted upon by a proportion of the delivery flow of the centrifugal pump.
  • the housing of the electric drive motor 2 includes in addition to the front end wall 8 a cylindrical inner housing 9 made of heat-conducting Material, for example aluminum or an aluminum alloy, a rear end wall 10 which is integrally formed with the inner housing or can be a related special part, and one Jacket 11.
  • This jacket surrounds the inner housing 9 with a radial Distance, so that an annular space 12 is formed between these two parts is arranged in the electrical means for operating the drive motor are, as will become clear.
  • the jacket 11 is preferably made of stainless material and preferably made of stainless steel with a wall thickness of 1 to 4 mm.
  • the jacket 11 also in the form of a bell or the like can be carried out, it is in the form shown in Fig. 1 as a paraboloid educated. Alternatively, it can also have the shape of a truncated cone or be tubular.
  • the coat is on its outer surface 11 generally free of cooling fins. If desired, however, he can be provided on the outside with cooling fins (not shown).
  • the motor housing of the electric drive motor 2 also contains one End cover 13, which is attached to the rear end of the inner housing 9 is. This attachment can be done with a central attachment screw 14 take place, which is screwed to the inner housing.
  • the rear end of the inner housing has a bearing support part 15 on which on the one hand a bearing 16 for the rear rotatable Bearing of the drive shaft 5 and on the other hand with a central threaded hole 17 for receiving the central Fastening screw 14 is provided.
  • the end cover 13 has an introductory training 18 for the Introduction of a power supply cable (not shown) for the electrical Power supply to the electrical, provided in the annulus 12 Means for operating and controlling the drive motor.
  • a power supply cable (not shown) for the electrical Power supply to the electrical, provided in the annulus 12 Means for operating and controlling the drive motor.
  • Continuous introductory training 18 can be an introducer sheath 19 can be provided, with the help of the power supply cable is sealed from the environment.
  • the front end wall 8 has a peripheral flange 8b, on the Outer surface of one end of the centrifugal pump 3 Sheath 11 is sealed against the environment.
  • the seal can be done for example by elastic O-rings 20, which in corresponding grooves of the peripheral flange 8b are arranged.
  • the other end of the jacket 11, which the end cover 13th is facing, has a recess formation 21, which on the rear End part 10 is applied. Furthermore, the rear end cover engages the recess 21 by means of the fastening force of the central one Screw 14 with the result that the jacket 11 with its related End is pressed against the rear end wall 10. This is the jacket 11 between the end cover 13 and the front End wall 8 clamped.
  • the secure radial fastening of the jacket 11 is essentially achieved by the rear end of the jacket is form-fitting, for example by the recess 21, wherein the jacket 11 further in its rear area between the End cover 13 and the rear end wall 10 are clamped becomes. It is therefore sufficient that the front end of the jacket 11 loose without further definition, but sealed by means of the O-rings 20 outside of the peripheral flange 8b of the front end wall 8 is applied.
  • the essentially cylindrical inner housing 9 has a heat-conducting one Cross section on which is preferably to the pump side of the electric drive motor 2 enlarged.
  • a heat-conducting one Cross section on which is preferably to the pump side of the electric drive motor 2 enlarged.
  • the inner housing with itself radially outward extending cooling fins 22 is provided as best as possible Fig. 2 can be seen.
  • the cylindrical body of the inner case from which the electric stator 7 is held, provided with a cross section is, which increases steadily towards the centrifugal pump 3.
  • the annular space has 12 between the inner housing 9 and the jacket 11 a considerable size, both in radial and in axial Direction.
  • This annulus is therefore ideally suited to the funds for electrical operation of the drive motor 2.
  • Such Means are summarized with reference numeral 23 in FIGS. 1 and 2 specified.
  • Such resources are generally known and include for example all terminals to the electrical stator 7 in the necessary way to supply electrical energy.
  • the means 23 also comprise means for automatic switching on and off of the drive motor and means for its speed control, the include a frequency converter, for example. This enumeration is not fully, so all funds are eligible for operation of the drive motor are important.
  • the operation of the motor pump unit 1 described arises Heat loss both in the electrical stator 7 and at some of the electrical equipment 23 in the annular space 12.
  • This heat loss is essentially dissipated via the material of the inner housing 9, namely to the centrifugal pump 3.
  • the heat loss reaches first to the front end wall 8 of the motor housing and then from a proportion of the flow of the centrifugal pump, which at the Surface 8a flows along the end wall 8, discharged. This is one effective cooling of the electric drive motor 2 given.

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

Abstract

The motor (2) has a rotatably mounted drive shaft with a rotor, a stator (7) enclosing the rotor and a motor housing that carries heat away with a front end wall for connection to the pump. An inner housing (9) that carries the stator consists of thermally conducting material and is in thermally conducting contact with the front end wall that is subjected to the medium on its pump side. A casing (11) around the inner housing forms a space (12) for motor electrics.

Description

Die Erfindung geht aus von einem elektrischen Antriebsmotor für eine eintauchbare Kreiselpumpe, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an electric drive motor for a submersible centrifugal pump, according to the preamble of claim 1.

Es ist in der Praxis bekannt, Kreiselpumpen zum Fördern von Abwasser so in einem Brunnen oder Becken zu installieren, dass die Kreiselpumpe wenigstens teilweise in das Abwasser eingetaucht ist, in welchem Fall das Abwasser seinen tiefsten Stand in dem Brunnen erreicht hat. Wenn der Abwasserpegel seinen höchsten Stand erreicht hat, ist das Aggregat in der Regel vollständig in das Abwasser eingetaucht. Wenn der elektrische Antriebsmotor solcher Pumpen mit einem Klemmenkasten, der in bekannter Weise die elektrischen Steuerteile zum automatischen Einund Ausschalten und zur Drehzahlregelung des Antriebsmotors enthält, ausgerüstet ist, so muss gewährleistet sein, dass der Klemmenkasten wasserdicht ist, um die elektrischen Steuerteile nicht zu schädigen und außer Funktion zu setzen. Das Dichtmaterial, welches zwischen dem Deckel und dem übrigen Kastenkörper des Klemmenkastens eingefügt ist, hat jedoch nur eine eingeschränkte Lebensdauer, so dass die Dichtigkeit des Klemmenkastens dementsprechend begrenzt ist, wozu auch die Aggressivität des zu fördernden Abwassers entscheidend beiträgt. Der Klemmenkasten solcher Antriebsmotoren muss daher in relativ kurzen Zeitintervallen auf Dichtigkeit überprüft werden, wobei das Dichtmaterial gegebenenfalls auszuwechseln ist. Die Wartungskosten für ein entsprechendes Kreiselpumpenaggregat sind somit relativ hoch.It is known in practice to use centrifugal pumps to pump waste water to install in a well or basin that the centrifugal pump is at least partially immersed in the waste water, in which case the waste water has reached its lowest level in the well. If the aggregate is the wastewater level usually completely immersed in the wastewater. If the electrical Drive motor of such pumps with a terminal box, which in known the electrical control parts for automatic Einund Switch off and contains for speed control of the drive motor, it must be ensured that the terminal box is waterproof so as not to damage the electrical control parts and to put out of function. The sealing material, which between the Inserted the lid and the rest of the body of the terminal box is, however, has a limited lifespan, so the tightness the terminal box is limited accordingly, which is why the aggressiveness of the wastewater to be pumped makes a decisive contribution. The terminal box of such drive motors must therefore be relatively short time intervals for tightness are checked, the sealing material replace if necessary. The maintenance cost for one Corresponding centrifugal pump unit are therefore relatively high.

Zur Vermeidung dieser Nachteile ist vorgeschlagen worden, den Klemmenkasten von der Kreiselpumpe als gesonderte Einheit auszubilden und diese Einheit an einer Stelle im Brunnen oder Becken anzuordnen, die vom steigenden Pegelstand des Abwassers in dem Brunnen bzw. Becken nicht erreicht wird. Die Einheit ist dann über ein elektrisches Kabel mit der funktionsgemäß installierten Kreiselpumpe verbunden. Die Herstellung einer solchen gesonderten Einheit ist relativ teuer und es ist nicht immer ein geeigneter Platz im Brunnen zur Anbringung der Einheit vorhanden. Des weiteren muss das Isoliermaterial des elektrischen, von der Einheit zur Kreiselpumpe verlaufenden Verbindungskabels von besonderer Qualität sein, um der Aggressivität des Abwassers widerstehen zu können.To avoid these disadvantages, the terminal box has been proposed trained as a separate unit by the centrifugal pump and to place this unit in one place in the well or basin, from the rising water level in the well or Pelvis is not reached. The unit is then electrical Cable connected to the functionally installed centrifugal pump. The Manufacturing such a separate unit is relatively expensive and it is not always a suitable place in the well for mounting the unit available. Furthermore, the insulating material of the electrical, from the unit to the centrifugal pump connecting cable from be of special quality to withstand the aggressiveness of the waste water to be able to.

In der Druckschrift EP 0 599 204 A1 (GP 128) ist ein Tauchpumpenaggregat beschrieben, bei welchem der elektrische Antriebsmotor für die Pumpe von einem Aggregatgehäuse mit Abstand umgeben ist. Zwischen dem Gehäuse des Antriebsmotors und dem Aggregatgehäuse ist somit ein Ringraum ausgebildet, in dem des weiteren ein axiales Förderrohr verläuft, das den Förderauslass der Pumpe mit einem herausragenden Druckstutzen des Aggregatgehäuses verbindet. Das axiale Förderrohr hat untere Austrittslöcher und obere Eintrittslöcher, so dass von dem Abförderstrom der Pumpe ein Nebenstrom abgeleitet wird, der in den genannten Ringraum unten eingeleitet und aus diesem oben wieder abgeleitet wird. Der Nebenstrom ist ein Kühlstrom, um den elektrischen Antriebsmotor außen zu kühlen, so dass der Ringraum als ständig mit Kühlmedium durchströmter Kühlraum dient.In the publication EP 0 599 204 A1 (GP 128) there is a submersible pump unit described in which the electric drive motor for the Pump is surrounded by a unit housing at a distance. Between the housing of the drive motor and the unit housing thus an annular space is formed in which there is also an axial delivery pipe runs that the pump delivery outlet with an outstanding Pressure connector of the unit housing connects. The axial delivery pipe has lower exit holes and upper entry holes, so from that Discharge flow of the pump a secondary flow is derived, which in the mentioned annulus initiated below and from this above again is derived. The bypass flow is a cooling flow to the electrical Cool the drive motor outside, so that the annulus as constantly using Cooling medium flows through the cooling chamber.

Die Aufgabe der Erfindung besteht in der Verbesserung eines für eine in ein Fördermedium eintauchbare Kreiselpumpe bestimmten elektrischen Antriebsmotors der einleitend angeführten Art dahingehend, dass die elektrischen Steuermittel, die zum Betrieb des Antriebsmotors, insbesondere zu seinem automatischen Ein- und Ausschalten und gegebenenfalls zu seiner Drehzahlsteuerung, erforderlich sind, im Motor integriert und damit gegen schädigende Auswirkungen des Fördermediums der Kreiselpumpe dauerhaft geschützt sind und dass der Antriebsmotor auch bei trockener Aufstellung des Aggregates sicher gekühlt wird.The object of the invention is to improve one for one a pumpable immersible centrifugal pump certain electrical Drive motor of the aforementioned type in that the electrical control means for operating the drive motor, in particular for its automatic switching on and off and if necessary for its speed control, are required, integrated in the engine and thus against harmful effects of the medium Centrifugal pump are permanently protected and that the drive motor is safely cooled even when the unit is installed dry.

Die Lösung der Aufgabe ist in dem Anspruch 1 angeführt.The solution to the problem is stated in claim 1.

Durch die erfindungsgemäße Lösung entfällt der außen am Motorgehäuse üblicherweise angebrachte Klemmenkasten mit den darin enthaltenen, bekannten Steuermitteln bzw. eine gesonderte Einheit mit den in Rede stehenden Steuermitteln einschließlich eines Verbindungskabels, welches die gesonderte Einheit mit dem elektrischen Antriebsmotor verbindet. Sämtliche Steuermittel sind nun - vom Montageraum des Netzanschlusses getrennt - in dem Ringraum des Antriebsmotors enthalten, der so gegenüber der äußeren Motorumgebung abgedichtet ist, dass ein schädigender Einfluss des Fördermediums, in welches der Motor gegebenenfalls eingetaucht ist, auf das Dichtungsmaterial des Motors nicht gegeben ist. Weil der Ringraum ein relativ großes Volumen besitzt, können die elektrischen Steuerteile an den jeweils vorteilhaftesten Plätzen innerhalb des Ringraumes angeordnet werden, und zwar zusätzlich zu der Möglichkeit, dass eine große Anzahl von Steuerteilen in dem Ringraum unterbringbar ist, wobei die Steuerteile selbst nicht unbedingt eine Miniaturbauweise aufweisen müsssen. Außerdem ist gewährleistet, dass die Verlustwärme des Motors sicher an das die Pumpe durchströmende Fördermedium abgeleitet wird. Die Verlustwärme wird von dem Innengehäuse des Antriebsmotors zur vorderen Endwand des Antriebsmotors geleitet, die wiederum vom Fördermedium der Pumpe beaufschlagt wird. Gleichzeitig dient das Innengehäuse auch als Wärmeableiter für diejenige Verlustwärme, die von den elektrischen Steuerteilen in dem erwähnten Ringraum ausgeht, zum Beispiel von dem Leistungsteil eines Frequenzumrichters. Die glatte Oberfläche des Aggregats vermindert die Gefahr der Schmutzablagerung.The solution according to the invention eliminates the outside of the motor housing usually attached terminal box with the inside known control means contained or a separate unit with the control means in question, including a connecting cable, which is the separate unit with the electric drive motor combines. All control means are now - from the assembly room of the mains connection separately - in the annular space of the drive motor included, which is sealed against the external engine environment is that a harmful influence of the medium in which the Engine is optionally immersed on the sealing material of the Motors is not given. Because the annulus has a relatively large volume owns, the electrical control parts can be the most advantageous Places are arranged within the annulus, namely in addition to the possibility that a large number of control parts in the annular space can be accommodated, the control parts themselves not being necessary must have a miniature design. It also ensures that the heat loss from the motor is safely transferred to the pump flowing medium is derived. The heat loss is from the inner casing of the drive motor to the front end wall of the Drive motor directed, which in turn from the pumped medium is applied. At the same time, the inner housing also serves as a heat sink for the heat loss from the electrical control parts in the annulus mentioned, for example from the Power section of a frequency converter. The smooth surface of the unit reduces the risk of dirt accumulation.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angeführt. Advantageous embodiments of the invention are in the subclaims cited.

Die Erfindung ist nachstehend anhand eines in den anliegenden Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1
einen Axialschnitt nach der Linie I - I in Fig. 2
Fig. 2
einen Querschnitt nach der Linie II - II in Fig. 1.
The invention is explained below with reference to an embodiment shown in the accompanying drawings. Show it:
Fig. 1
an axial section along the line I - I in Fig. 2nd
Fig. 2
a cross section along the line II - II in Fig. 1st

In Fig. 1 ist ein allgemein mit 1 bezeichnetes Motorpumpenaggregat dargestellt, das aus einem elektrischen Antriebsmotor 2 und einer eintauchbaren Kreiselpumpe 3 besteht. Der Antriebsmotor und die Kreiselpumpe sind beispielsweise durch einen üblichen Klemmring 4 miteinander fest verbunden. Der Antriebsmotor weist eine in ihren Endbereichen drehbar gelagerte Antriebswelle 5, einen darauf drehfest angeordneten Rotor 6 und einen dem Rotor radial gegenüberliegenden elektrischen Stator 7 auf. Der Stator 7 ist in einem Gehäuse des Antriebsmotors drehfest gelagert, wobei dieses Gehäuse eine vordere Endwand 8 einschließt, mit welcher die Kreiselpumpe 3 mittels des Befestigungsringes 4 verbunden ist. Die vordere Endwand 8 besteht aus wärmeleitendem Material und wird auf ihrer der Pumpe 3 zugekehrten Fläche 8a mit einem Anteil des Förderstroms der Kreiselpumpe beaufschlagt.In Fig. 1 is a generally designated 1 motor pump unit shown, which consists of an electric drive motor 2 and a submersible Centrifugal pump 3 exists. The drive motor and the centrifugal pump are together, for example, by a conventional clamping ring 4 firmly connected. The drive motor has one in its end areas rotatably mounted drive shaft 5, a rotatably arranged thereon Rotor 6 and one radially opposite the rotor electric stator 7. The stator 7 is in a housing of the Drive motor rotatably mounted, this housing a front End wall 8 includes with which the centrifugal pump 3 by means of Fastening ring 4 is connected. The front end wall 8 consists of thermally conductive material and is facing the pump 3 Surface 8a is acted upon by a proportion of the delivery flow of the centrifugal pump.

Das Gehäuse des elektrischen Antriebsmotors 2 umfasst neben der vorderen Endwand 8 ein zylindrisches Innengehäuse 9 aus wärmeleitendem Material, zum Beispiel Aluminium oder eine Aluminiumlegierung, eine hintere Endwand 10, die mit dem Innengehäuse einstückig ausgebildet oder ein damit verbundenes Sonderteil sein kann, und einen Mantel 11. Dieser Mantel umgibt das Innengehäuse 9 mit radialem Abstand, so dass zwischen diesen beiden Teilen ein Ringraum 12 ausgebildet ist, in dem elektrische Mittel zum Betrieb des Antriebsmotors angeordnet sind, wie noch klar wird. Der Mantel 11 besteht vorzugsweise aus nichtrostendem Material und vorzugsweise aus nichtrostendem Stahl mit einer Wandstärke von 1 bis 4 mm. The housing of the electric drive motor 2 includes in addition to the front end wall 8 a cylindrical inner housing 9 made of heat-conducting Material, for example aluminum or an aluminum alloy, a rear end wall 10 which is integrally formed with the inner housing or can be a related special part, and one Jacket 11. This jacket surrounds the inner housing 9 with a radial Distance, so that an annular space 12 is formed between these two parts is arranged in the electrical means for operating the drive motor are, as will become clear. The jacket 11 is preferably made of stainless material and preferably made of stainless steel with a wall thickness of 1 to 4 mm.

Obwohl der Mantel 11 auch in Form einer Glocke oder dergleichen ausgeführt sein kann, ist er in der in Fig. 1 gezeigten Form als Paraboloidstumpf ausgebildet. Alternativ hierzu kann er auch kegelstumpfförmig oder rohrförmig ausgebildet sein. Auf seiner Außenfläche ist der Mantel 11 im allgemeinen frei von Kühlrippen. Gewünschtenfalls kann er jedoch auf seiner Außenseite mit Kühlrippen versehen sein (nicht dargestellt).Although the jacket 11 also in the form of a bell or the like can be carried out, it is in the form shown in Fig. 1 as a paraboloid educated. Alternatively, it can also have the shape of a truncated cone or be tubular. The coat is on its outer surface 11 generally free of cooling fins. If desired, however, he can be provided on the outside with cooling fins (not shown).

Das Motorgehäuse des elektrischen Antriebsmotors 2 enthält auch einen Abschlussdeckel 13, der am hinteren Ende des Innengehäuses 9 befestigt ist. Diese Befestigung kann durch eine zentrale Befestigungsschraube 14 erfolgen, die mit dem Innengehäuse verschraubt ist. Im gezeigten Fall weist das hintere Ende des Innengehäuses ein Lagertragteil 15 auf, welches einerseits ein Lager 16 für die hintere drehbare Lagerung der Antriebswelle 5 aufweist und andererseits mit einem zentralen Gewindeloch 17 für die Aufnahme der zentralen Befestigungsschraube 14 versehen ist.The motor housing of the electric drive motor 2 also contains one End cover 13, which is attached to the rear end of the inner housing 9 is. This attachment can be done with a central attachment screw 14 take place, which is screwed to the inner housing. in the case shown, the rear end of the inner housing has a bearing support part 15 on which on the one hand a bearing 16 for the rear rotatable Bearing of the drive shaft 5 and on the other hand with a central threaded hole 17 for receiving the central Fastening screw 14 is provided.

Der Abschlussdeckel 13 weist eine Einführungsausbildung 18 für die Einführung eines Stromversorgungskabels (nicht gezeigt) für die elektrische Energieversorgung der elektrischen, im Ringraum 12 vorgesehenen Mittel zum Betrieb und Steuerung des Antriebsmotors auf. In der einen Durchgang darstellenden Einführungsausbildung 18 kann eine Einführungshülse 19 vorgesehen sein, mit deren Hilfe das Stromversorgungskabel gegenüber der Umgebung abgedichtet ist.The end cover 13 has an introductory training 18 for the Introduction of a power supply cable (not shown) for the electrical Power supply to the electrical, provided in the annulus 12 Means for operating and controlling the drive motor. In one Continuous introductory training 18 can be an introducer sheath 19 can be provided, with the help of the power supply cable is sealed from the environment.

Die vordere Endwand 8 weist einen Umfangsflansch 8b auf, an dessen Außenfläche der eine, der Kreiselpumpe 3 zugekehrte Endbereich des Mantels 11 gegenüber der Umgebung abgedichtet anliegt. Die Abdichtung kann beispielsweise durch elastische O-Ringe 20 erfolgen, die in entsprechenden Nuten des Umfangflansches 8b angeordent sind.The front end wall 8 has a peripheral flange 8b, on the Outer surface of one end of the centrifugal pump 3 Sheath 11 is sealed against the environment. The seal can be done for example by elastic O-rings 20, which in corresponding grooves of the peripheral flange 8b are arranged.

Das andere Ende des Mantels 11, welches dem Abschlussdeckel 13 zugekehrt ist, weist eine Rezessausbildung 21 auf, welche an dem hinteren Endteil 10 anliegt. Des weiteren greift der hintere Abschlussdeckel in den Rezess 21 ein, und zwar mittels der Befestigungskraft der zentralen Schraube 14 mit der Folge, dass der Mantel 11 mit seinem diesbezüglichen Ende gegen die hintere Endwand 10 gedrückt wird. Dadurch ist der Mantel 11 zwischen dem Abschlussdeckel 13 und der vorderen Endwand 8 eingespannt. Die sichere radiale Befestigung des Mantels 11 wird im Wesentlichen dadurch erzielt, dass das hintere Ende des Mantels formschlüssig ausgebildet ist, beispielsweise durch den Rezess 21, wobei der Mantel 11 des weiteren in seinem hinteren Bereich zwischen dem Abschlussdeckel 13 und der hinteren Endwand 10 eingeklemmt gehalten wird. Es reicht daher aus, dass der vordere Endbereich des Mantels 11 ohne eine weitere Festlegung lose, jedoch abgedichtet mittels der O-Ringe 20 außen an dem Umfangsflansch 8b der vorderen Endwand 8 anliegt.The other end of the jacket 11, which the end cover 13th is facing, has a recess formation 21, which on the rear End part 10 is applied. Furthermore, the rear end cover engages the recess 21 by means of the fastening force of the central one Screw 14 with the result that the jacket 11 with its related End is pressed against the rear end wall 10. This is the jacket 11 between the end cover 13 and the front End wall 8 clamped. The secure radial fastening of the jacket 11 is essentially achieved by the rear end of the jacket is form-fitting, for example by the recess 21, wherein the jacket 11 further in its rear area between the End cover 13 and the rear end wall 10 are clamped becomes. It is therefore sufficient that the front end of the jacket 11 loose without further definition, but sealed by means of the O-rings 20 outside of the peripheral flange 8b of the front end wall 8 is applied.

Das im Wesentlichen zylindrische Innengehäuse 9 weist einen wärmeleitenden Querschnitt auf, der sich vorzugsweise zur Pumpenseite des elektrischen Antriebsmotors 2 hin vergrößert. Dies kann beispielsweise dadurch erreicht werden, dass das Innengehäuse mit sich radial auswärts erstreckenden Kühlrippen 22 versehen ist, wie es am besten aus Fig. 2 zu erkennen ist. Zusätzlich oder alternativ ist es jedoch auch möglich, dass sich der zylindrische Körper des Innengehäuses, von welchem der elektrische Stator 7 gehalten wird, mit einem Querschnitt versehen ist, der sich zur Kreiselpumpe 3 hin stetig vergrößert.The essentially cylindrical inner housing 9 has a heat-conducting one Cross section on which is preferably to the pump side of the electric drive motor 2 enlarged. For example can be achieved in that the inner housing with itself radially outward extending cooling fins 22 is provided as best as possible Fig. 2 can be seen. Additionally or alternatively, it is also possible that the cylindrical body of the inner case from which the electric stator 7 is held, provided with a cross section is, which increases steadily towards the centrifugal pump 3.

Wie aus den Fig. 1 und 2 sehr deutlich zu erkennen ist, weist der Ringraum 12 zwischen dem Innengehäuse 9 und dem Mantel 11 eine beträchtliche Größe auf, und zwar sowohl in radialer als auch in axialer Richtung. Dieser Ringraum ist daher vorzüglich dafür geeignet, die Mittel zum elektrischen Betrieb des Antriebsmotors 2 aufzunehmen. Solche Mittel sind summarisch mit dem Bezugszeichen 23 in den Fig. 1 und 2 angegeben. Derartige Betriebsmittel sind allgemein bekannt und umfassen beipielsweise sämtliche Klemmen, um den elektrischen Stator 7 in der erforderlichen Weise mit elektrischer Energie zu versorgen. Die Mittel 23 umfassen des weiteren Mittel zum automatischen Ein- und Ausschalten des Antriebsmotors und Mittel zu seiner Drehzahlsteuerung, die beispielsweise einen Frequenzumrichter enthalten. Diese Aufzählung ist nicht vollständig, so dass alle Mittel in Frage kommen, die für den Betrieb des Antriebsmotors von Bedeutung sind.As can be seen very clearly from FIGS. 1 and 2, the annular space has 12 between the inner housing 9 and the jacket 11 a considerable size, both in radial and in axial Direction. This annulus is therefore ideally suited to the funds for electrical operation of the drive motor 2. Such Means are summarized with reference numeral 23 in FIGS. 1 and 2 specified. Such resources are generally known and include for example all terminals to the electrical stator 7 in the necessary way to supply electrical energy. The means 23 also comprise means for automatic switching on and off of the drive motor and means for its speed control, the include a frequency converter, for example. This enumeration is not fully, so all funds are eligible for operation of the drive motor are important.

Im Betrieb des beschriebenen Motorpumpenaggregates 1 entsteht Verlustwärme sowohl im elektrischen Stator 7 als auch an einigen der elektrischen Betriebsmittel 23 in dem Ringraum 12. Diese Verlustwärme wird im Wesentlichen über das Material des Innengehäuses 9 abgeführt, und zwar zur Kreiselpumpe 3 hin. Hierbei gelangt die Verlustwärme zunächst an die vordere Endwand 8 des Motorgehäuses und wird dann von einem Anteil des Förderstromes der Kreiselpumpe, welcher an der Fläche 8a der Endwand 8 entlangströmt, abgeführt. Hierdurch ist eine wirksame Kühlung des elektrischen Antriebsmotors 2 gegeben.The operation of the motor pump unit 1 described arises Heat loss both in the electrical stator 7 and at some of the electrical equipment 23 in the annular space 12. This heat loss is essentially dissipated via the material of the inner housing 9, namely to the centrifugal pump 3. Here, the heat loss reaches first to the front end wall 8 of the motor housing and then from a proportion of the flow of the centrifugal pump, which at the Surface 8a flows along the end wall 8, discharged. This is one effective cooling of the electric drive motor 2 given.

Claims (13)

Elektrischer Antriebsmotor für eine eintauchbare Kreiselpumpe umfassend eine drehbar gelagerte Antriebswelle mit einem darauf drehfest angeordneten Rotor, einen den Rotor umgebenden Stator und ein Wärme abführendes Motorgehäuse mit einer mit der Kreiselpumpe verbindbaren vorderen Endwand,
dadurch gekennzeichnet, dass das Motorgehäuse ein Innengehäuse (9) , das den Stator (7) trägt, aus wärmeleitendem Material besteht und mit der vorderen Endwand (8) , die auf ihrer Pumpenseite 8a mit Fördermedium der Kreiselpumpe beaufschlagbar ist, in wärmeleitendem Kontakt steht, und einen das Innengehäuse (9) mit radialem Abstand umgebenden Mantel (11) zur Ausbildung eines gegenüber äußeren Motorumgebung abgedichteten Ringraumes (12) zwischen dem Innengehäuse und diesem Mantel aufweist und dass in dem Ringraum (11) elektrische Mittel (23) zum Betrieb des Antriebsmotors (2) angeordnet sind.Electric drive motor for a submersible centrifugal pump comprising a rotatably mounted drive shaft with a rotor arranged thereon in a rotationally fixed manner, a stator surrounding the rotor and a heat-dissipating motor housing with a front end wall which can be connected to the centrifugal pump,
characterized in that the motor housing has an inner housing (9) which carries the stator (7), is made of heat-conducting material and is in heat-conducting contact with the front end wall (8), which can be supplied with the medium of the centrifugal pump on its pump side 8a, and a jacket (11) surrounding the inner housing (9) with a radial spacing for forming an annular space (12) which is sealed off from the external engine environment between the inner housing and this jacket, and that in the annular space (11) there are electrical means (23) for operating the drive motor (2) are arranged. Antriebsmotor nach Anspruch 1, dadurch gekennzeichnet, dass der Mantel (11) aus nichtrostendem Metall besteht.Drive motor according to claim 1, characterized in that the jacket (11) consists of stainless metal. Antriebsmotor nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Motorgehäuse einen Abschlussdeckel (13) aufweist, der am hinteren Ende des Innengehäuses (9) befestigt ist. Drive motor according to claim 1 or 2, characterized in that the motor housing has an end cover (13) which is attached to the rear end of the inner housing (9). Antriebsmotor nach Anspruch 3, dadurch gekennzeichnet, dass der Mantel (11) rohrförmig, kegelstumpfförmig oder in Form eines Paraboloidstumpfes ausgebildet ist.Drive motor according to claim 3, characterized in that the jacket (11) is tubular, frustoconical or in the form of a paraboloid frustum. Antriebsmotor nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der Mantel (11) mit seinen beiden Enden zwischen der vorderen Endwand (8) und dem Abschlussdeckel (13) eingespannt ist.Drive motor according to claim 3 or 4, characterized in that the jacket (11) is clamped with its two ends between the front end wall (8) and the end cover (13). Antriebsmotor nach Anspruch 5, dadurch gekennzeichnet, dass der Mantel (11) mit seinen beiden Enden an der vorderen Endwand (8) und an dem hinteren Abschlussdeckel (13) formschlüssig angreift und mittels des Abschlussdeckels am hinteren Ende des Innengehäuses (9) klemmend befestigt ist.Drive motor according to claim 5, characterized in that the jacket (11) engages with its two ends on the front end wall (8) and on the rear end cover (13) in a form-fitting manner and is clamped by means of the end cover on the rear end of the inner housing (9) , Antriebsmotor nach Anspruch 6, dadurch gekennzeichnet, dass der Abschlussdeckel (13) mittels einer zentralen Befestigungsschraube (14) mit dem Innengehäuse verbunden ist.Drive motor according to claim 6, characterized in that the end cover (13) is connected to the inner housing by means of a central fastening screw (14). Antriebsmotor nach Anspruch 7, dadurch gekennzeichnet, dass an dem hinteren Ende des Innengehäuses (9) ein Lagertragteil (15) für die drehbare Lagerung der Antriebswelle (5) vorgesehen ist und dass das Lagertragteil (15) ein zentrales Gewindeloch (17) für die Aufnahme der zentralen Befestigungsschraube (14) aufweist.Drive motor according to claim 7, characterized in that a bearing support part (15) for the rotatable mounting of the drive shaft (5) is provided at the rear end of the inner housing (9) and in that the bearing support part (15) has a central threaded hole (17) for the reception the central fastening screw (14). Antriebsmotor nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Innengehäuse (9) mit sich radial auswärts erstreckenden Kühlrippen (22) versehen ist. Drive motor according to one of claims 1 to 8, characterized in that the inner housing (9) is provided with radially outwardly extending cooling fins (22). Antriebsmotor nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Innengehäuse (9) aus Aluminium oder einer Aluminiumlegierung besteht.Drive motor according to one of claims 1 to 9, characterized in that the inner housing (9) consists of aluminum or an aluminum alloy. Antriebsmotor nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass sich der wärmeleitende Querschnitt des Innengehäuses (9) zur Pumpenseite des Antriebsmotors (2) hin vergrößert.Drive motor according to one of claims 1 to 10, characterized in that the heat-conducting cross section of the inner housing (9) increases towards the pump side of the drive motor (2). Antriebsmotor nach einem der Ansprüche 3 bis 11, dadurch gekennzeichnet, dass der Abschlussdeckel (13) eine Einführungsausbildung (18) für die Einführung eines Stromversorgungskabels für die elektrische Energieversorgung der elektrischen Mittel (23) zum Betrieb des Antriebsmotors (2) aufweist.Drive motor according to one of claims 3 to 11, characterized in that the end cover (13) has an insertion formation (18) for the introduction of a power supply cable for the electrical energy supply of the electrical means (23) for operating the drive motor (2). Antriebsmotor nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass der Mantel (11) auf seiner Außenseite mit Kühlrippen versehen ist.Drive motor according to one of claims 1 to 12, characterized in that the jacket (11) is provided on its outside with cooling fins.
EP01112676A 2001-05-25 2001-05-25 Pump unit with drive motor and submersible pump Expired - Lifetime EP1260714B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01112676A EP1260714B1 (en) 2001-05-25 2001-05-25 Pump unit with drive motor and submersible pump
DE50111547T DE50111547D1 (en) 2001-05-25 2001-05-25 Motor pump unit with electric drive motor and submersible centrifugal pump

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Application Number Priority Date Filing Date Title
EP01112676A EP1260714B1 (en) 2001-05-25 2001-05-25 Pump unit with drive motor and submersible pump

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EP1260714B1 EP1260714B1 (en) 2006-11-29

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EP1959144A2 (en) * 2007-02-17 2008-08-20 DLP Limited An electric shower-waste pump and control unit
WO2021165631A1 (en) * 2020-02-18 2021-08-26 Bowman Power Group Limited An electric turbomachine
EP4105488A1 (en) * 2021-06-28 2022-12-21 Dab Pumps S.p.A. Improved maintenance immersion pump
US20220412374A1 (en) * 2021-06-28 2022-12-29 Garrett Transportation I Inc. Integrated e-machine controller for turbomachine having fastener arrangement for electronics components
EP4112902A1 (en) * 2021-06-28 2023-01-04 Garrett Transportation I Inc. Coolant system for integrated e-machine controller for turbomachine

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EP1959144A2 (en) * 2007-02-17 2008-08-20 DLP Limited An electric shower-waste pump and control unit
EP1959144A3 (en) * 2007-02-17 2009-10-21 DLP Limited An electric shower-waste pump and control unit
WO2021165631A1 (en) * 2020-02-18 2021-08-26 Bowman Power Group Limited An electric turbomachine
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EP4112902A1 (en) * 2021-06-28 2023-01-04 Garrett Transportation I Inc. Coolant system for integrated e-machine controller for turbomachine
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US11781565B2 (en) * 2021-06-28 2023-10-10 Garrett Transportation I Inc. Integrated e-machine controller for turbomachine having fastener arrangement for electronics components
CN115596712B (en) * 2021-06-28 2024-03-19 盖瑞特动力科技(上海)有限公司 Fluid compressor device, turbocharger and method for manufacturing a fluid compressor device
EP4105488A1 (en) * 2021-06-28 2022-12-21 Dab Pumps S.p.A. Improved maintenance immersion pump

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