EP1778980A1 - Eccentric screw pump with integrated drive - Google Patents

Eccentric screw pump with integrated drive

Info

Publication number
EP1778980A1
EP1778980A1 EP05768100A EP05768100A EP1778980A1 EP 1778980 A1 EP1778980 A1 EP 1778980A1 EP 05768100 A EP05768100 A EP 05768100A EP 05768100 A EP05768100 A EP 05768100A EP 1778980 A1 EP1778980 A1 EP 1778980A1
Authority
EP
European Patent Office
Prior art keywords
rotor
screw pump
eccentric screw
pump according
eccentric
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
EP05768100A
Other languages
German (de)
French (fr)
Other versions
EP1778980B1 (en
Inventor
Helmut Jaberg
Dirk Schmidt
Ralf Schueler
Thomas Ribbe
Johann Kreidl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Publication of EP1778980A1 publication Critical patent/EP1778980A1/en
Application granted granted Critical
Publication of EP1778980B1 publication Critical patent/EP1778980B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits

Definitions

  • the invention relates to a screw or Exzen ⁇ terschneckenpumpe, as used in particular for the promotion of highly viscous or mixed with solids media.
  • Progressive cavity pumps which correspond to the prior art usually have a fixed outer stator and a rotor running therein.
  • the drive of the rotor usually carried out by an external electric motor, which is connected by means of a joint or bending shaft with the rotor.
  • an external electric motor which is connected by means of a joint or bending shaft with the rotor.
  • worm and eccentric vane pumps since this has no effect on the principle on which the invention is based.
  • a major improvement here is the arrangement of DE 102 51 846 AI.
  • the rotor ei ⁇ ner eccentric screw pump at the same time also part of the engine.
  • the propeller shaft can be unfolded. len.
  • Such an arrangement has the disadvantage that only special, equipped with expensive magnetic materials Roto ⁇ ren can be used.
  • Due to the helical arrangement of the stator results in a relatively complex stator winding, which also leads here to relatively high production costs.
  • EP 0 357 317 B1 discloses a motor which can simultaneously perform a rotational movement and a lifting movement, in conjunction with an eccentric screw pump.
  • an elastic stator without a jacket is used to compensate for the eccentric movement of the worm.
  • this pump is not suitable for high pressures.
  • the invention has for its object to make a Exzen ⁇ terschneckenpumpe such that the torque required to drive the pump without additional, the design of the pump extending means and without shaft seals and shaft bearings are supplied can and at the same time the pump is also suitable for high pressures.
  • the device according to the invention comprises an eccentric worm pump with a stator 2 and a rotor 1 running therein.
  • a drive motor is provided, which is connected to the rotor.
  • This drive motor comprises a rotor 3 and a stator winding 4.
  • the rotor is designed as a cylindrical rotor and, by virtue of its rigid connection to the rotor, circulates on an eccentric circular path within an approximately cylindrical pot 5.
  • This pot 5 is at least partially enclosed by a stator winding 4.
  • the stator winding can also be integrated in this pot.
  • the transformation element such as, for example, a cardan shaft or also a bending shaft, can be dispensed with for the transformation of the central rotation of the drive motor into the eccentric movement of the rotor.
  • a second rotor 3a is provided as an approximately cylindrical rotor. It is arranged at the end of the rotor 1, which is opposite to the first rotor. This rotor is also rigidly connected to the rotor and therefore also runs on an eccentric circular path within a second pot 5a. This second pot is also enclosed by a second stator winding or contains a second stator winding.
  • a further advantageous embodiment of the invention is that the motor of rotor 3 and Stator ⁇ winding 4 is designed in the form of a reluctance motor.
  • the stator winding has coils for generating a rotating magnetic field.
  • a preferably tooth-shaped part is made of magnetically conductive or v / magnetic magnetic material, such as iron.
  • the teeth align according to the magnetic field.
  • a control unit is provided for controlling the corresponding parts of the stator winding 4. This controls now the current flow through the stator winding such that for generating a torque, the flux is preferentially guided through those regions of the pot 5, which have a minimum distance from the surface of the rotor 3.
  • a position sensor is preferably provided which sgnalome the exact position of the rotor or of the rotor with respect to the stator.
  • a position sensor can also be realized, for example, with the aid of the magnets integrated in the rotor.
  • the motor is designed in the form of an asynchronous motor. • this purpose, or preferably formed as the rotor .Widerstands tenur as a squirrel-cage rotor. Furthermore, windings for generating a rotating field are provided in the stator winding. As a result of the rotary field, voltages are induced in the rotor windings or in the conductive rotor structure which, depending on the electrical resistance of the windings or the rotor structure, lead to corresponding currents. These currents in turn cause a magnetic field and thus a torque.
  • an optional control circuit advantageously a frequency converter, is provided for generating the phase-shifted signals of variable frequency for generating a rotating field with the desired rotation frequency.
  • grooves for receiving rotor windings can be provided in the rotor.
  • Another embodiment of the invention provides that in the rotor 3 preferably axial bores ange ⁇ are introduced, through which the medium can flow. Thus, a diversion channel for the medium is no longer necessary. This results in a particularly compact, space-saving design of the arrangement.
  • the magnetic components or permanent magnets in the rotor and the coils in the stator are arranged such that a predetermined force is exerted on the rotor in the axial direction. It is particularly advantageous if the axial force counteracts the pump pressure with the same magnitude.
  • a bearing regulator is preferably used which controls the position of the rotor by means of at least one position sensor.
  • Another embodiment of the invention provides a rotor which is displaceable in the axial direction by the axial force. By means of such displaceability, the reduction in the breakaway torque during pump startup can be achieved.
  • the pump outlet can thereby be closed by the rotor itself.
  • a valve body can also be actuated by the axial movement of the rotor. This allows especially for dosing pumps a particularly fine and follow-up dosing.
  • coils in the rotor are polarized opposite to the coils, which carry the torque over the rotor.
  • Fig. 1 shows in a general form schematically a device according to the invention.
  • Fig. 2 shows in general form a device according to the invention in perspective view.
  • FIG 3 shows a device according to the invention with a second rotor.
  • FIG. 4 shows a device according to the invention with a second rotor in a perspective view.
  • FIG. 1 a device according to the invention is shown schematically in a section perpendicular to the axis of rotation.
  • An eccentric screw pump has a rotor 1, which moves in a stator 2.
  • the rotor 1 is rigidly connected to a rotor 3.
  • the runner runs on an eccentric path within the pot 5.
  • the promotional to 'medium here passes through the pot 5.
  • For the generation of the torque is at least one stator coil 4 is provided.
  • the stator winding is integrated in the exemplary embodiment in the pot, but may preferably be arranged outside of the pot and thus au ⁇ ßerraum the medium. She can, too optionally integrated into the pot, for example cast ver ⁇ .
  • the stator winding has individual coils. These coils can be supplied with power by a control unit.
  • a position sensor is preferably provided which signals the exact position of the rotor or of the purchaser with respect to the stator or the pot.
  • a position sensor can also be realized, for example, by or with the aid of the magnets integrated in the rotor.
  • FIG. 2 shows the previously illustrated arrangement in a perspective view.
  • FIG. 3 shows a further device according to the invention with a second rotor 3a.
  • This second rotor is arranged on the opposite end of the first rotor of the rotor. Accordingly, the second rotor is also assigned a second pot 5a and a second stator winding 4a for generating the torque.
  • the two runners are designed such that they produce a mutually directed axial thrust force, which holds the two runners and 'the rotor in a predetermined position.
  • the runners can advantageously be formed at least slightly conical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The pump has a rotor (1) which runs in it and a driving motor which is connected to the rotor such as a fixed winding (4). Runners surround the rotor and housing covers the runners. As the rotors are turned the fixed winding is arranged and the runner and the rotor are rigidly connected. A second runner (3a) is arranged near the cylindrical runners at the opposite end of the rotor and rotates on a circular path within a cylindrical housing (5a), at which the second fixed winding (4a) is arranged.

Description

Exzenterschneckenpumpe mit integriertem Antrieb Eccentric screw pump with integrated drive
Technisches Gebiet Die Erfindung betrifft eine Schnecken- bzw. Exzen¬ terschneckenpumpe, wie sie insbesondere zur Förderung von hochviskosen bzw. mit Feststoffen versetzten Medien verwendet wird.TECHNICAL FIELD The invention relates to a screw or Exzen¬ terschneckenpumpe, as used in particular for the promotion of highly viscous or mixed with solids media.
Stand der TechnikState of the art
Exzenterschneckenpumpen die dem Stand der Technik ent¬ sprechen, weisen meist einen feststehenden äußeren Sta¬ tor und einen darin laufenden Rotor auf. Der Antrieb des Rotors .erfolgt meist durch einen externen Elektro- motor, welcher mittels einer Gelenk- bzw. Biegewelle mit dem Rotor verbunden ist. In den :nachfolgenden Aus¬ führungen wird zwischen Schnecken- und Exzenterschnek- kenpumpen nicht weiter unterschieden, da dies keine Auswirkungen auf das der Erfindung zugrundeliegende Prinzip hat.Progressive cavity pumps which correspond to the prior art usually have a fixed outer stator and a rotor running therein. The drive of the rotor. Usually carried out by an external electric motor, which is connected by means of a joint or bending shaft with the rotor. In the following embodiments, there is no further distinction between worm and eccentric vane pumps, since this has no effect on the principle on which the invention is based.
Bekannte Exzenterschneckenpumpen weisen jedoch eine lange Bauform auf und sind aufgrund der hohen Anzahl beweglicher Teile in Motor, Gelenkwelle und Pumpe war- tungsbedürftig. Zudem ist bei einer solchen Anordnung auf mindestens einer Seite der Pumpe eine Abdichtung zur Gelenkwelle-hin notwendig.However, known eccentric screw pumps have a long design and are in need of maintenance due to the high number of moving parts in the motor, drive shaft and pump. In addition, in such an arrangement on at least one side of the pump, a seal for propeller shaft-out necessary.
Eine wesentliche Verbesserung stellt hier die Anordnung aus der DE 102 51 846 AI dar. Hierin ist' der Rotor ei¬ ner Exzenterschneckenpumpe gleichzeitig auch Teil des Motors. Somit kann insbesondere die Gelenkwelle entfal- len. Eine solche Anordnung hat den Nachteil, dass nur spezielle, mit teuren Magnetmaterialien bestückte Roto¬ ren eingesetzt werden können. Weiterhin ergibt sich aufgrund der schraubenförmigen Anordnung des Stators eine relativ komplexe Statorwicklung, welche auch hier zu relativ hohen Herstellungskosten führt.A major improvement here is the arrangement of DE 102 51 846 AI. Herein is ' the rotor ei¬ ner eccentric screw pump at the same time also part of the engine. Thus, in particular, the propeller shaft can be unfolded. len. Such an arrangement has the disadvantage that only special, equipped with expensive magnetic materials Roto¬ ren can be used. Furthermore, due to the helical arrangement of the stator results in a relatively complex stator winding, which also leads here to relatively high production costs.
Ein anderer Lösungsansatz wird in der DE 43 13 442 Al dargestellt. So wird, wie beispielsweise in Figur 24 offenbart, eine Exzenterschneckenpumpe mit einem ela¬ stischen Stator und einem Rotor, der durch eine Magnet¬ kupplung angetrieben wird, angegeben. Durch diese An¬ ordnung kann die Magnetkupplung mit einem einfachen La¬ ger gelagert werden, da der Ausgleich der Bewegung der Schnecke durch den elastischen Stator erfolgt. Derarti¬ ge Pumpen sind aufgrund der hohen Elastizität der Sta¬ toren ohne Mantel nicht für hohe Drücke geeignet.Another approach is shown in DE 43 13 442 Al. Thus, as disclosed for example in FIG. 24, an eccentric screw pump with an elastic stator and a rotor which is driven by a magnetic coupling is specified. As a result of this arrangement, the magnetic coupling can be mounted with a simple bearing since the compensation of the movement of the worm takes place through the elastic stator. Derarti¬ ge pumps are not suitable for high pressures due to the high elasticity of Sta¬ factors without coat.
Die EP 0 357 317 Bl offenbart einen Motor, welcher gleichzeitig eine Drehbewegung sowie eine Hubbewegung durchführen kann, in Verbindung mit einer Exzen¬ terschneckenpumpe. Auch hier wird ein elastischer Sta¬ tor ohne Mantel zum Ausgleich der exzentrischen Bewe¬ gung der Schnecke eingesetzt. Somit ist auch diese Pum- pe nicht für hohe Drücke geeignet.EP 0 357 317 B1 discloses a motor which can simultaneously perform a rotational movement and a lifting movement, in conjunction with an eccentric screw pump. Here too, an elastic stator without a jacket is used to compensate for the eccentric movement of the worm. Thus, this pump is not suitable for high pressures.
Darstellung der ErfindungPresentation of the invention
Der Erfindung liegt die Aufgabe zugrunde, eine Exzen¬ terschneckenpumpe derart zu gestalten, dass das zum An- trieb der Pumpe benötigte Drehmoment ohne zusätzliche, die Bauform der Pumpe verlängernde Mittel sowie ohne Wellendichtungen und Wellenlagerungen zugeführt werden kann und gleichzeitig die Pumpe auch für hohe Drücke geeignet ist.The invention has for its object to make a Exzen¬ terschneckenpumpe such that the torque required to drive the pump without additional, the design of the pump extending means and without shaft seals and shaft bearings are supplied can and at the same time the pump is also suitable for high pressures.
Eine erfindungsgemäße Lösung dieser Aufgabe ist in dem unabhängigen Patentanspruch 1 angegeben. Weiterbildun¬ gen der Erfindung sind Gegenstand der abhängigen An¬ sprüche.An inventive solution to this problem is specified in the independent claim 1. Further developments of the invention are the subject of the dependent claims.
Die erfindungsgemäße Vorrichtung umfasst eine Exzen- terschneckenpumpe mit einem Stator 2 und einem darin laufenden Rotor 1. Zum Antrieb des Rotors 1 ist ein An¬ triebsmotor vorgesehen, welcher mit dem Rotor verbunden ist. Dieser Antriebsmotor umfasst einen Läufer 3 sowie eine Statorwicklung 4. Der Läufer ist als zylindrischer Läufer ausgebildet und läuft durch seine starre Verbin¬ dung mit dem Rotor auf einer exzentrischen Kreisbahn innerhalb eines näherungsweise zylindrischen Topfes 5 um. Dieser Topf 5 wird zumindest teilweise von einer Statorwicklung 4 umschlossen. Alternativ kann die Sta- torwicklung auch in diesen Topf integriert sein. Durch eine solche Anordnung sind Antrieb und Pumpe äußerst platzsparend in eine einzige Einheit integriert. Gleichzeitig wird die mechanische Konstruktion wesent¬ lich vereinfacht. So sind keine anfälligen Wellendich- tungen notwendig, da der Rotor vollständig abgeschlos¬ sen in dem System aus Stator und den angeschlossenen Leitungen läuft. Es wird keinerlei Verbindung bzw. Kon¬ takt vom Rotor zu Punkten außerhalb des Systems benö¬ tigt. Damit kann die Pumpe, bestehend aus Rotor und Stator, ohne zusätzliche Verbindungen und Wellendich¬ tungen in eine vorhandene Rohrleitung eingeflanscht werden. Durch die erfindungsgemäße Anordnung kann auch das Um¬ wandlungsglied, wie beispielsweise eine Gelenkwelle oder auch Biegewelle, für die Transformation der zen- trischen Rotation des Antriebsmotors in die exzentri¬ sche Bewegung des Rotors entfallen.The device according to the invention comprises an eccentric worm pump with a stator 2 and a rotor 1 running therein. To drive the rotor 1, a drive motor is provided, which is connected to the rotor. This drive motor comprises a rotor 3 and a stator winding 4. The rotor is designed as a cylindrical rotor and, by virtue of its rigid connection to the rotor, circulates on an eccentric circular path within an approximately cylindrical pot 5. This pot 5 is at least partially enclosed by a stator winding 4. Alternatively, the stator winding can also be integrated in this pot. Such an arrangement drive and pump are extremely space-saving integrated into a single unit. At the same time, the mechanical construction is substantially simplified. Thus, no susceptible shaft seals are necessary, since the rotor runs completely closed in the system of stator and the connected lines. No connection or contact from the rotor to points outside the system is required. Thus, the pump, consisting of rotor and stator, without additional connections and Wellendich¬ lines are flanged into an existing pipeline. As a result of the arrangement according to the invention, the transformation element, such as, for example, a cardan shaft or also a bending shaft, can be dispensed with for the transformation of the central rotation of the drive motor into the eccentric movement of the rotor.
In einer besonders vorteilhaften Ausgestaltung der Er¬ findung ist ein zweiter Läufer 3a als näherungsweise zylindrischer Läufer vorgesehen. Er ist an dem Ende des Rotors 1 angeordnet, welches dem ersten Läufer entge¬ gengesetzt ist. Auch dieser Läufer ist starr mit dem Rotor verbunden und läuft daher ebenfalls auf einer ex¬ zentrischen Kreisbahn innerhalb eines zweiten Topfes 5a. Dieser zweite Topf ist ebenfalls von einer zweiten Statorwicklung umschlossen bzw. enthält eine zweite Statorwicklung.In a particularly advantageous embodiment of the invention, a second rotor 3a is provided as an approximately cylindrical rotor. It is arranged at the end of the rotor 1, which is opposite to the first rotor. This rotor is also rigidly connected to the rotor and therefore also runs on an eccentric circular path within a second pot 5a. This second pot is also enclosed by a second stator winding or contains a second stator winding.
Eine weitere vorteilhafte Ausgestaltung der Erfindung besteht darin, dass der Motor aus Läufer 3 und Stator¬ wicklung 4 in Form eines Reluktanzmotors ausgeführt ist. Hierzu weist die Statorwicklung Spulen zur Erzeu¬ gung eines drehenden Magnetfeldes auf. Im Läufer befin¬ det sich ein vorzugsweise zahnförmig ausgebildetes Teil aus magnetisch leitfähigem bzw. v/eichmagnetischem Mate¬ rial, wie beispielsweise Eisen. Hierbei richten sich die Zähne entsprechend dem Magnetfeld aus. Durch eine Drehung des Magnetfeldes kann somit auch eine Drehung des Rotors erreicht werden.A further advantageous embodiment of the invention is that the motor of rotor 3 and Stator¬ winding 4 is designed in the form of a reluctance motor. For this purpose, the stator winding has coils for generating a rotating magnetic field. In the rotor, a preferably tooth-shaped part is made of magnetically conductive or v / magnetic magnetic material, such as iron. Here, the teeth align according to the magnetic field. By rotation of the magnetic field can thus be achieved, a rotation of the rotor.
Eine Steuereinheit ist zur Steuerung der entsprechenden Teile der Statorwicklung 4 vorgesehen. Diese steuert nun den Stromfluss durch die Statorwicklung derart, dass zur Erzeugung eines Drehmoments der Fluss vorzugs¬ weise durch diejenigen Bereiche des Topfes 5 geführt wird, welche einen minimalen Abstand zu Oberfläche des Läufers 3 aufweisen.A control unit is provided for controlling the corresponding parts of the stator winding 4. This controls now the current flow through the stator winding such that for generating a torque, the flux is preferentially guided through those regions of the pot 5, which have a minimum distance from the surface of the rotor 3.
Zur richtigen Ansteuerung der Spulen ist vorzugsweise ein Positionssensor vorgesehen, der die exakte Position des Rotors bzw. des Läufers in Bezug auf den Stator sgnalisiert. Ein solcher Positionssensor kann bei¬ spielsweise auch mit Hilfe der in den Rotor integrier¬ ten Magnete realisiert werden.For the correct control of the coils, a position sensor is preferably provided which sgnalisiert the exact position of the rotor or of the rotor with respect to the stator. Such a position sensor can also be realized, for example, with the aid of the magnets integrated in the rotor.
In einer weiteren vorteilhaften Ausgestaltung der Er- findung ist der Motor in Form eines Asynchronmotors ausgelegt. • Hierzu ist der Läufer als .Widerstandsläufer bzw. vorzugsweise als Kurzschlussläufer ausgebildet. Weiterhin sind in der Statorwicklung Wicklungen zur Er¬ zeugung eines Drehfeldes vorgesehen. Durch das Drehfeld werden in den Rotorwicklungen bzw. in der leitenden Ro¬ torstruktur Spannungen induziert, welche je nach dem elektrischen Widerstand der Wicklungen bzw. der leiten¬ den Rotorstruktur zu entsprechenden Strömen führen. Diese Ströme verursachen wiederum ein Magnetfeld und damit ein Drehmoment. Zur Ansteuerung der Wicklungen ist eine optionale Steuerschaltung, vorteilhafterweise ein Frequenzumrichter, zur Erzeugung der phasenverscho¬ benen Signale variabler Frequenz zur Erzeugung eines Drehfeldes mit der gewünschten Drehfrequenz vorgesehen.In a further advantageous embodiment of the invention, the motor is designed in the form of an asynchronous motor. • this purpose, or preferably formed as the rotor .Widerstandsläufer as a squirrel-cage rotor. Furthermore, windings for generating a rotating field are provided in the stator winding. As a result of the rotary field, voltages are induced in the rotor windings or in the conductive rotor structure which, depending on the electrical resistance of the windings or the rotor structure, lead to corresponding currents. These currents in turn cause a magnetic field and thus a torque. To control the windings, an optional control circuit, advantageously a frequency converter, is provided for generating the phase-shifted signals of variable frequency for generating a rotating field with the desired rotation frequency.
Wahlweise können in dem Rotor Nuten zur Aufnahme von Rotorwicklungen vorgesehen sein-. Eine andere Ausgestaltung der Erfindung sieht vor, dass in dem Läufer 3 vorzugsweise axiale Bohrungen ange¬ bracht sind, durch welche das Medium hindurchfließen kann. Somit ist ein Umleitungskanal für das Medium nicht mehr notwendig. Es ergibt sich dadurch ein beson¬ ders kompakter, platzsparender Aufbau der Anordnung.Optionally, grooves for receiving rotor windings can be provided in the rotor. Another embodiment of the invention provides that in the rotor 3 preferably axial bores ange¬ are introduced, through which the medium can flow. Thus, a diversion channel for the medium is no longer necessary. This results in a particularly compact, space-saving design of the arrangement.
In einer weiteren vorteilhaften Ausgestaltung der Er- findung sind die magnetischen Komponenten bzw. Perma¬ nentmagnete im Läufer sowie die Spulen im Stator derart angeordnet, dass eine vorgegebene Kraft in axialer Richtung auf den Rotor ausgeübt wird. Besonders vor¬ teilhaft ist es, wenn die axiale Kraft mit gleicher Stärke dem Pumpendruck entgegenwirkt. Zur Überwachung der Rotorposition wird vorzugsweise ein Lagerregler eingesetzt, der die Position des Rotors mit Hilfe we¬ nigstens eines Positionssensors steuert.In a further advantageous embodiment of the invention, the magnetic components or permanent magnets in the rotor and the coils in the stator are arranged such that a predetermined force is exerted on the rotor in the axial direction. It is particularly advantageous if the axial force counteracts the pump pressure with the same magnitude. For monitoring the rotor position, a bearing regulator is preferably used which controls the position of the rotor by means of at least one position sensor.
Eine weitere Ausgestaltung der Erfindung sieht einen Rotor vor, der durch die axiale Kraft in Axialrichtung verschiebbar ist. Durch eine solche Verschiebbarkeit kann die Verringerung des Losbrechmoments beim Pumpen¬ anlauf erreicht werden. Ebenso kann dadurch beispiels- weise der Pumpenauslass durch den Rotor selbst ver¬ schlossen werden. Alternativ kann selbstverständlich auch durch die axiale Bewegung des Rotors ein Ventil¬ körper betätigt werden. Dies ermöglicht insbesondere bei Dosierpumpen eine besonders feine und nachlauffreie Dosierung. In einer weiteren vorteilhaften Ausgestaltung der Er¬ findung sind Spulen im Läufer entgegengesetzt zu den Spulen gepolt, die das Drehmoment auf den Rotor über¬ tragen. Durch diese steuerbare Umkehrpolung wird im Ro- tor eine Kraft erzeugt, die entgegen der Strömungsri'ch- tung des gepumpten' Mediums wirkt und damit die vom Me¬ dium erzeugten hydraulischen Kräfte auf die Stirnseiten des Rotors kompensiert oder reduziert. Die notwendige Anzahl der umgekehrt gepolten Spulen kann dem erzeugten Förderdruck variabel angepasst werden. Another embodiment of the invention provides a rotor which is displaceable in the axial direction by the axial force. By means of such displaceability, the reduction in the breakaway torque during pump startup can be achieved. Likewise, by way of example, the pump outlet can thereby be closed by the rotor itself. Alternatively, of course, a valve body can also be actuated by the axial movement of the rotor. This allows especially for dosing pumps a particularly fine and follow-up dosing. In a further advantageous embodiment of the invention, coils in the rotor are polarized opposite to the coils, which carry the torque over the rotor. By this controllable Umkehrpolung a force is generated in the ro tor, which, contrary to the Strömungsri 'ch- tung the pumped' acts medium and thus the compensated or reduced by Me¬ dium generated hydraulic forces on the end faces of the rotor. The necessary number of reversely poled coils can be variably adjusted to the generated delivery pressure.
Beschreibung der ZeichnungenDescription of the drawings
Die Erfindung wird nachstehend ohne Beschränkung des allgemeinen Erfindungsgedankens anhand von Ausführungs- beispielen unter Bezugnahme auf die Zeichnungen exem¬ plarisch beschrieben.The invention is described below without limiting the general idea of the invention by means of exemplary embodiments with reference to the drawings exem¬ plarisch.
Die Fig. 1 zeigt in allgemeiner Form schematisch eine erfindungsgemäße Vorrichtung.Fig. 1 shows in a general form schematically a device according to the invention.
Fig. 2 zeigt in allgemeiner Form eine erfindungsgemäße Vorrichtung perspektivischer Ansicht.Fig. 2 shows in general form a device according to the invention in perspective view.
Fig. 3 zeigt eine erfindungsgemäße Vorrichtung mit ei- nem zweiten Läufer.3 shows a device according to the invention with a second rotor.
Fig. 4 zeigt eine erfindungsgemäße Vorrichtung mit ei¬ nem zweiten Läufer in perspektivischer Ansicht.4 shows a device according to the invention with a second rotor in a perspective view.
In Fig. 1 ist eine erfindungsgemäße Vorrichtung schema¬ tisch in einem Schnitt senkrecht zur Drehachse darge¬ stellt. Eine Exzenterschneckenpumpe weist einen Rotor 1 auf, welcher sich in einem Stator 2 bewegt. Der Rotor 1 ist starr mit einem Läufer 3 verbunden. Der Läufer läuft auf einer exzentrischen Bahn innerhalb des Topfes 5 um. Das zu 'fördernde Medium durchläuft hierbei den Topf 5. Zur Erzeugung des Drehmoments ist wenigstens eine Statorwicklung 4 vorgesehen. Die Statorwicklung ist im Ausführungsbeispiel in den Topf integriert, kann jedoch vorzugsweise außerhalb des Topfes und somit au¬ ßerhalb des Mediums angeordnet sein. Sie kann aber auch wahlweise in den Topf integriert, beispielsweise ver¬ gossen sein. Die Statorwicklung weist einzelne Spulen auf. Diese Spulen sind durch eine Steuereinheit wahl¬ weise mit Strom versorgbar.In FIG. 1, a device according to the invention is shown schematically in a section perpendicular to the axis of rotation. An eccentric screw pump has a rotor 1, which moves in a stator 2. The rotor 1 is rigidly connected to a rotor 3. The runner runs on an eccentric path within the pot 5. The promotional to 'medium here passes through the pot 5. For the generation of the torque is at least one stator coil 4 is provided. The stator winding is integrated in the exemplary embodiment in the pot, but may preferably be arranged outside of the pot and thus au¬ ßerhalb the medium. She can, too optionally integrated into the pot, for example cast ver¬. The stator winding has individual coils. These coils can be supplied with power by a control unit.
Zur richtigen Ansteuerung der Spulen ist vorzugsweise ein Positionssensor vorgesehen, der die exakte Position des Rotors bzw. des Käufers in Bezug auf den Stator bzw. den Topf signalisiert. Ein solcher Positionssensor kann beispielsweise auch durch die bzw. mit Hilfe der in den Rotor integrierten Magnete realisiert werden.For the correct control of the coils, a position sensor is preferably provided which signals the exact position of the rotor or of the purchaser with respect to the stator or the pot. Such a position sensor can also be realized, for example, by or with the aid of the magnets integrated in the rotor.
Fig. 2 zeigt die zuvor dargestellte Anordnung in per¬ spektivischer Ansicht.FIG. 2 shows the previously illustrated arrangement in a perspective view.
In Fig. 3 ist eine weitere erfindungsgemäße Vorrichtung mit einem zweiten Läufer 3a dargestellt. Dieser zweite Läufer ist an dem dem ersten Läufer gegenüberliegenden Ende des Rotors angeordnet. Entsprechend ist dem zwei- ten Läufer auch ein zweiter Topf 5a sowie eine zweite Statorwicklung 4a zur Erzeugung des Drehmoments zuge¬ ordnet. Bei einer solchen Ausgestaltung ist es vorteil¬ haft, wenn die beiden Läufer derart ausgebildet sind, dass sie eine gegeneinander gerichtete axiale Schub- kraft erzeugen, welche die beiden Läufer und 'den Rotor in einer vorgegebenen Position hält. Hierzu können die Läufer vorteilhafterweise zumindest leicht kegelförmig ausgebildet werden.FIG. 3 shows a further device according to the invention with a second rotor 3a. This second rotor is arranged on the opposite end of the first rotor of the rotor. Accordingly, the second rotor is also assigned a second pot 5a and a second stator winding 4a for generating the torque. In such an embodiment, it is advantageous if the two runners are designed such that they produce a mutually directed axial thrust force, which holds the two runners and 'the rotor in a predetermined position. For this purpose, the runners can advantageously be formed at least slightly conical.
Fig. 4 zeigt die zuvor dargestellte Anordnung in per¬ spektivischer Ansicht. Bezugszeichenliste4 shows the arrangement shown above in a perspective view. LIST OF REFERENCE NUMBERS
1 Rotor1 rotor
2 Stator 3 Läufer2 stator 3 runners
4 Wicklung4 winding
5 Topf 5 pot

Claims

Patentansprüche claims
1.1.
Exzenterschneckenpumpe, umfassend einen Stator (2) und einen darin laufenden Rotor (1), sowie einen Antriebsmotor zum Antrieb des Rotors, welcher mit dem Rotor (1) verbunden ist, umfassend eine Statorwicklung (4), einen Läufer (3, 3a), der als näherungsweise zylindrischer Läufer ausgebildet ist und auf einer exzentrischenEccentric screw pump, comprising a stator (2) and a rotor (1) running therein, and a drive motor for driving the rotor, which is connected to the rotor (1), comprising a stator winding (4), a rotor (3, 3a), which is designed as an approximately cylindrical rotor and on an eccentric
Kreisbahn innerhalb eines näherungsweise zylindrischen Topfes (5) umläuft, an welchem die Statorwicklung (4) angeordnet ist, wobei der Läufer und der Rotor starr verbunden sind.Circular path within an approximately cylindrical pot (5) rotates, on which the stator winding (4) is arranged, wherein the rotor and the rotor are rigidly connected.
2.Second
Exzenterschneckenpumpe nach Anspruch 1, dadurch gekennzeichnet, daß ein zweiter Läufer (3 a) als näherungsweise zylindrischer Läufer an dem dem ersten Läufer entgegengesetzten Ende des Rotors (1) angeordnet ist und auf einer exzentrischen Kreisbahn innerhalb eines näherungsweise zylindrischen Topfes (5a) umläuft, an welchem die zweite Statorwicklung (4a) angeordnet ist.Eccentric screw pump according to claim 1, characterized in that a second rotor (3a) is arranged as an approximately cylindrical rotor at the first rotor opposite end of the rotor (1) and on an eccentric circular path within an approximately cylindrical pot (5a) rotates on which the second stator winding (4a) is arranged.
3.Third
Exzenterschneckenpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mehrere Rotoren (1) mit jeweils einem darauf folgenden Läufer (3) in einer Kette aus Läufern und Rotoren angeordnet sind.Eccentric screw pump according to claim 1 or 2, characterized in that a plurality of rotors (1), each with a subsequent rotor (3) are arranged in a chain of rotors and rotors.
4.4th
Exzenterschneckenpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in dem Läufer (3) Permanentmagnete, Reluktanzmagnete oder weichmagnetische Materialien vorgesehen sind. Eccentric screw pump according to one of the preceding claims, characterized in that permanent magnets, reluctance magnets or soft magnetic materials are provided in the rotor (3).
5.5th
Exzenterschneckenpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Steuereinheit vorgesehen ist, welche die entsprechenden Teile der Statorwicklung (4) in Abhängigkeit von der Position des Läufers (3) derart ansteuert, daß ein Drehmoment auf den Rotor ausgeübt wird, wobei der magnetische Fluß vorzugsweise durch diejenigen Bereiche des Topfes (5) gefuhrt wird, welche einen minimalen Abstand zur Oberfläche des Läufers (3) aufweisen.Eccentric screw pump according to one of the preceding claims, characterized in that a control unit is provided which controls the corresponding parts of the stator winding (4) in dependence on the position of the rotor (3) such that a torque is applied to the rotor, wherein the magnetic Flow preferably through those areas of the pot (5) is guided, which have a minimum distance from the surface of the rotor (3).
6. Exzenterschneckenpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Läufer (3) Bohrungen aufweist, durch die das Medium hindurchfließen kann.6. Eccentric screw pump according to one of the preceding claims, characterized in that the rotor (3) has bores through which the medium can flow.
7. Exzenterschneckenpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Läufer (3) Permanentmagnete und weiterhin die Spulen (4) derart angeordnet sind, daß eine vorgegebene Axialkraft auf den Rotor (1) ausgeübt wird.7. Eccentric screw pump according to one of the preceding claims, characterized in that in the rotor (3) permanent magnets and further the coils (4) are arranged such that a predetermined axial force on the rotor (1) is applied.
8.8th.
Exzenterschneckenpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Läufer (3) Permanentmagnete bzw. Spulen (4) in Gruppen angeordnet sind, wobei die Axialkräfte der einzelnen Gruppen auf den Rotor in vorzugsweise entgegengesetzten Richtungen wirken.Eccentric screw pump according to one of the preceding claims, characterized in that permanent magnets or coils (4) are arranged in groups in the rotor (3), the axial forces of the individual groups acting on the rotor in preferably opposite directions.
9.9th
Exzenterschneckenpumpe nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß der Rotor durch die Axialkraft in axialer Richtung verschiebbar ist. Eccentric screw pump according to claim 7 or 8, characterized in that the rotor is displaceable in the axial direction by the axial force.
10.10th
Exzenterschneckenpumpe nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß zur Verringerung des Losbrechmoments beim Pumpenanlauf eine zusätzliche Axialkraft ausgeübt bzw. eine zusätzliche Axialbewegung ausgeführt wird.Eccentric screw pump according to claim 7 or 8, characterized in that for reducing the breakaway torque at the pump start an additional axial force exerted or an additional axial movement is performed.
11.11th
Exzenterschneckenpumpe nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß eine zusätzliche Axialbewegung zum Verschluß des Pumpenauslasses oder zur Betätigung eines Ventilkörpers eingesetzt wird.Eccentric screw pump according to claim 7 or 8, characterized in that an additional axial movement for closing the pump outlet or for actuating a valve body is used.
12.12th
Exzenterschneckenpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine zusätzliche Axialbewegung zum Verschluß des Pumpenauslasses oder zur Betätigung eines Ventilkörpers eingesetzt wird. Eccentric screw pump according to one of the preceding claims, characterized in that an additional axial movement for closing the pump outlet or for actuating a valve body is used.
EP05768100A 2004-08-10 2005-07-15 Eccentric screw pump with integrated drive Not-in-force EP1778980B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004038686A DE102004038686B3 (en) 2004-08-10 2004-08-10 Spiral pump e.g. for integrated drive, has rotor which runs in it and driving motor connected to rotor such as fixed winding, and runners surrounding rotor and covered by housing
PCT/DE2005/001251 WO2006015571A1 (en) 2004-08-10 2005-07-15 Eccentric screw pump with integrated drive

Publications (2)

Publication Number Publication Date
EP1778980A1 true EP1778980A1 (en) 2007-05-02
EP1778980B1 EP1778980B1 (en) 2007-10-31

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US (1) US20070104595A1 (en)
EP (1) EP1778980B1 (en)
JP (1) JP2008509335A (en)
KR (1) KR100874043B1 (en)
CN (1) CN100460680C (en)
AT (1) ATE377150T1 (en)
BR (1) BRPI0513307A (en)
CA (1) CA2553795C (en)
DE (3) DE102004038686B3 (en)
ES (1) ES2294727T3 (en)
MX (1) MXPA06011759A (en)
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KR100874043B1 (en) 2008-12-12
ATE377150T1 (en) 2007-11-15
RU2361116C2 (en) 2009-07-10
ES2294727T3 (en) 2008-04-01
CA2553795C (en) 2009-07-14
JP2008509335A (en) 2008-03-27
CA2553795A1 (en) 2006-02-16
CN100460680C (en) 2009-02-11
RU2006145438A (en) 2008-09-20
MXPA06011759A (en) 2007-05-31
DE112005002517A5 (en) 2007-07-12
KR20070033954A (en) 2007-03-27
EP1778980B1 (en) 2007-10-31
BRPI0513307A (en) 2008-05-06
US20070104595A1 (en) 2007-05-10
CN101006276A (en) 2007-07-25
DE502005001849D1 (en) 2007-12-13
WO2006015571A1 (en) 2006-02-16
DE102004038686B3 (en) 2005-08-25

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