EP0719938B1 - Travelling wave piezo electric motor for canned motor pumps with magnetic coupling - Google Patents

Travelling wave piezo electric motor for canned motor pumps with magnetic coupling Download PDF

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Publication number
EP0719938B1
EP0719938B1 EP95119281A EP95119281A EP0719938B1 EP 0719938 B1 EP0719938 B1 EP 0719938B1 EP 95119281 A EP95119281 A EP 95119281A EP 95119281 A EP95119281 A EP 95119281A EP 0719938 B1 EP0719938 B1 EP 0719938B1
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EP
European Patent Office
Prior art keywords
rotor
pump drive
drive according
magnetic
partition
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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.)
Expired - Lifetime
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EP95119281A
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German (de)
French (fr)
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EP0719938A1 (en
Inventor
Hans-Jürgen Kech
Wolfram Gerber
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Wilo GmbH
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Wilo GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/027—Details of the magnetic circuit
    • 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
    • F04D13/0666—Units comprising pumps and their driving means the pump being electrically driven the motor being of the plane gap type

Definitions

  • the invention relates to a magnetic pump drive with an outer rotor driven by a motor, the drives an inner rotor via a magnetic coupling, with a gap between the outer and inner rotor exists, in which a partition lies, which the Media-carrying side from the dry side of the Motors separates.
  • Such magnetic pump drives are sufficient known and are especially for centrifugal pumps used. A can separates them Media-carrying side from the drive side of the Pump.
  • EP 0 279 220 includes a centrifugal pump Magnetic coupling between the magnets arranged and sealing against the medium to be conveyed Can of two nested canisters consists.
  • the motors used today to drive pumps are mainly based on the electromagnetic Principle.
  • Electric motors are known to have the big disadvantage that complicated to manufacture and relatively large stator and rotor windings are necessary, to generate high torques and develop conditionally high electrical and magnetic losses Operating temperatures. Due to the large dimensions of a such an electric motor, based on the conventional one electromagnetic principle, fall today Centrifugal pump drives are relatively large.
  • Piezo traveling wave motors Drives with smaller dimensions based on a Piezo traveling wave motors are e.g. from US 5,099,166 known.
  • This document discloses one Piezo traveling wave motor consisting of a vibrating Element for generating a traveling wave and a with the vibrating element in contact with the element which is driven by the traveling wave.
  • the object of the invention is therefore a novel To provide drive system for centrifugal pumps, which is a compact design and high Functional reliability with small dimensions guaranteed.
  • the object is achieved in that the outer rotor of a piezo traveling wave motor is driven, the outer rotor of the pump with one attached to this contact layer close to one Vibration stator of the traveling wave motor is present.
  • the outer rotor can also generate speeds via a gearbox is connected to the piezo traveling wave motor be.
  • the piezo elements of the Piezo traveling wave motor on the inside of a den outer rotor comprising part are attached. It is also structurally advantageous if the Piezo elements are attached to a disc, the Washer on the side of the medium carrying the medium Partition separating the dry side of the motor rests against rotation.
  • the piezo elements can also be arranged directly on the pump housing. This leads to a particularly small design of the pump drive under Use fewer components.
  • the partition should advantageously between the Pump housing and the support carrying the piezo elements lie sealingly, the partition in particular is a flat part.
  • the partition can also be double-walled, so that between the walls the dividing wall is arranged a display medium that with is in contact with an external indicator, which means that any Damage to the partition can be detected early.
  • a structurally simple design of the pump drive arises when on the formed as a flat part Partition attached a bearing bearing part or is integrally formed, wherein the bearing rotates the pump impeller holds.
  • the arranged on the side carrying the medium Magnets of the magnetic coupling are advantageous the side of the pump impeller facing the partition attached. This eliminates the current one Centrifugal pumps necessary rotors carrying the magnets, which is not just a weight reduction, but also results in a higher functional reliability of the pump.
  • the magnets on the drive side are then due to the construction on the partition facing Side of the rotor advantageously designed as a disc attached.
  • FIG Housing 1 A centrifugal pump is shown in FIG Housing 1 a pump impeller 2 on a shaft 3, the shaft 3 is at one end by means of designed as a roller bearing 13 on the inside supports the containment shell.
  • the one on wave 3 arranged inner rotor 4 carries on its cylindrical Surface magnets 5, which with the on the outer rotor 6th arranged magnets 7 form a magnetic coupling.
  • the containment can 10 separates the side 22 carrying the medium the pump from the dry side 21, in which the Piezo traveling wave drive is located.
  • the housing 1 of the pump has a cover 14 closed, the cover 14 by means of screws 15 on Housing is attached. Between the lid 14 and the Housing 1 and the containment shell 10 is a sealing part 17th on.
  • the containment can 10 can be double-walled, so that between the two walls of the can 10 Display medium 16 is, which with a not shown, located on the outside of the pump housing 1.14 Indicator is connected. In the can 10 located display medium 16 and the indicator Damage to the containment shell 10 indicated early.
  • the outer rotor 6 becomes nuts 19 and disc springs 20 with its contact surface against that as a disc trained vibration stator 9 pressed, the Vibration stator 9 with its other side to the Piezo elements 8 is applied, and the piezo elements 8 are applied the inside of the housing cover 14 are attached.
  • FIG. 2 shows a further embodiment of a centrifugal pump with a piezo traveling shaft drive.
  • the outer rotor 6 is now ring-shaped, with the housing cover 1 pressurizing the rotor 6 in the direction of the vibrating stator 9 and piezo elements 8.
  • Between the housing cover 14 and the rotor 6 is a slide bearing, consisting of a rubber washer 11 and a plate spring 11a.
  • the piezo elements 8 are arranged on a disk 23, which rests against rotation between the housing cover 1 and the separating body 10 designed as a containment shell, and deform in the axial direction due to the voltage applied to them and generate the required traveling wave in the oscillating stator 9.
  • FIG. 3 shows a further embodiment of a centrifugal pump with a piezo traveling shaft drive, the piezo elements 8 being arranged on a disk 23 which is fastened in the housing cover 14 by means of screws 24 and the disk 23 by means of a tensioning screw 18 and the associated nuts 19 with their Piezo elements 8 and the vibration stator 9 is pressed firmly against the rotor 6 in the axial direction.
  • the can 10 is designed such that it is a has an annular recess in which the rotor 6 with engages his magnet 7 and another centric, open to the medium side 22 Recess in which the shaft 3 carrying the impeller 2 is stored on the bearing 13.
  • the one with the magnets 7 corresponding magnets 5 are directly on the Can 10 facing side of impeller 2 attached.
  • FIG. 4 shows a centrifugal pump with a Piezo traveling wave drive, in which the with the Vibration stator 9 corresponding adhesive layer of the rotor 6 and the magnets 7 of the magnetic coupling 5.7 on the pump-facing side of the rotor 6 are attached.
  • the Housing cover 14 presses over a slide bearing, in particular consisting of a rubber washer 11 and a plate spring lla, the rotor 6 by means of the screws 15 against the Vibration stator 9.
  • the piezo elements 8 are on one Washer 23 arranged between the housing 1 and the vibrating stator 9.
  • the partition demonstrates 3 shows only one recess which holds the bearing 13, in which the rotatably connected to the pump impeller 2 Shaft 3 is mounted.
  • FIG. 5 shows a centrifugal pump in which the separating body 10 a flat disc, in particular a double-walled one Washer is on the side on the conveying medium a sleeve 12 is molded or attached to her Inside a bearing 13, in particular a roller bearing in which the shaft 3 carrying the pump impeller 2 rotatable.
  • FIG. 6 a centrifugal pump is shown in which the Housing cover 14 is a flat disc, which by means of Screws 15 over the slide bearing 11, 11a against the rotor 6 presses the vibration stator 9 and the piezo elements 8, being between the piezo elements 8 and the housing 1 the separating body 10 lies sealingly and on the Separating body 10 is a body 3 is formed, the is particularly cylindrical and on its outer surface has a bearing 13 on which the pump impeller 2 is rotatable is stored.
  • Figure 7 shows a centrifugal pump with a Piezo traveling wave drive, in which the piezo elements 8 on a cylindrical inner surface of the housing cover 14 lie in, the piezo elements 8 in radial Extend the direction by applying an external voltage or contract, and thereby the vibration stator 9 in Give resonance.
  • the rotor 6 is a, wherein the rotor 6 with its cylindrical surface located adhesive layer in the vibration stator 9.
  • Figures 8 and 9 show a centrifugal pump of a piezo traveling wave motor, in which the Magnetic coupling 5,7 in the axial direction by a Separating body 10 acts.
  • the magnets 5 are on the Separating body 10 facing side of the impeller 2 attached.
  • the magnets 7 are on the pump impeller 2 facing side of the disc or ring-shaped rotor 6 arranged.
  • the rotor 6 lies entirely or in sections with its cylindrical surface on the as a sleeve trained vibration stator 9 with its contact layer on.
  • the piezo elements 8 lie in a ring in the Housing cover 14 or the pump housing 1.
  • the Surface of the rotor 6 and the sleeve-shaped Vibration stators 9 are curved, in particular concave or executed convex, which makes the rotor 6 in axial Direction is held by the vibrating stator 9. It can either the surface of the rotor 6 or the Surface shape of the vibration stator 9 at least partially be concave or convex.

Description

Die Erfindung betrifft einen magnetischen Pumpenantrieb mit einem von einem Motor angetriebenen äußeren Rotor, der über eine Magnetkupplung einen inneren Rotor antreibt, wobei zwischen äußerem und innerem Rotor ein Spalt besteht, in dem eine Trennwand einliegt, die die fördermediumsführende Seite von der Trockenseite des Motors trennt.The invention relates to a magnetic pump drive with an outer rotor driven by a motor, the drives an inner rotor via a magnetic coupling, with a gap between the outer and inner rotor exists, in which a partition lies, which the Media-carrying side from the dry side of the Motors separates.

Derartige magnetische Pumpenantriebe sind hinlänglich bekannt und werden insbesondere für Kreiselpumpen verwendet. Dabei trennt ein Spalttopf die fördermediumsführende Seite von der Antriebsseite der Pumpe.Such magnetic pump drives are sufficient known and are especially for centrifugal pumps used. A can separates them Media-carrying side from the drive side of the Pump.

So offenbart z.B. die EP 0 279 220 eine Kreiselpumpe mit Magnetkupplung bei der der zwischen den Magneten angeordnete und gegen das zu fördernde Medium dichtende Spalttopf aus zwei ineinander gesteckten Spalttöpfen besteht. For example, EP 0 279 220 includes a centrifugal pump Magnetic coupling between the magnets arranged and sealing against the medium to be conveyed Can of two nested canisters consists.

Die heute verwendeten Motoren zum Antrieb von Pumpen basieren dabei überwiegend auf dem elektromagnetischen Prinzip. Elektromotoren haben jedoch bekanntlich den großen Nachteil, daß kompliziert herzustellende und relativ große Stator- und Rotorwicklungen notwendig sind, um hohe Drehmomente zu erzeugen und entwickeln bedingt durch die elektrischen und magnetischen Verluste hohe Betriebstemperaturen. Durch die großen Abmessungen eines solchen Elektromotors, basierend auf dem herkömmlichen elektromagnetischen Prinzip, fallen heutige Kreiselpumpenantriebe relativ groß aus.The motors used today to drive pumps are mainly based on the electromagnetic Principle. Electric motors, however, are known to have the big disadvantage that complicated to manufacture and relatively large stator and rotor windings are necessary, to generate high torques and develop conditionally high electrical and magnetic losses Operating temperatures. Due to the large dimensions of a such an electric motor, based on the conventional one electromagnetic principle, fall today Centrifugal pump drives are relatively large.

Antriebe mit geringeren Abmessungen auf der Basis eines Piezo-Wanderwellenmotors sind z.B. aus der US 5 099 166 bekannt. Dieses Dokument offenbart einen Piezo-Wanderwellenmotor bestehend aus einem schwingenden Element zur Erzeugung einer Wanderwelle und einem mit dem schwingenden Element in Kontakt stehenden Element, welches durch die Wanderwelle angetrieben wird.Drives with smaller dimensions based on a Piezo traveling wave motors are e.g. from US 5,099,166 known. This document discloses one Piezo traveling wave motor consisting of a vibrating Element for generating a traveling wave and a with the vibrating element in contact with the element which is driven by the traveling wave.

Aufgabe der Erfindung ist es daher, ein neuartiges Antriebssystem für Kreiselpumpen bereitszustellen, welches eine kompakte Bauweise und hohe Funktionssicherheit bei kleinen Abmessungen gewährleistet.The object of the invention is therefore a novel To provide drive system for centrifugal pumps, which is a compact design and high Functional reliability with small dimensions guaranteed.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß der äußere Rotor von einem Piezo-Wanderwellenmotor angetrieben wird, wobei der äußere Rotor der Pumpe mit einer an diesem angebrachten Kontaktschicht eng an einem Schwingstator des Wanderwellenmotors anliegt.The object is achieved in that the outer rotor of a piezo traveling wave motor is driven, the outer rotor of the pump with one attached to this contact layer close to one Vibration stator of the traveling wave motor is present.

Der große Vorteil eines Piezo-Wanderwellenmotors gegenüber herkömmlichen, auf dem elektromagnetischen Prinzip basierenden Elektromotoren ist dabei ein vergleichsweise größeres Drehmoment bei gleichem Bauvolumen.The great advantage of a piezo traveling wave motor compared to conventional, on the electromagnetic Principle based electric motors is one comparatively larger torque for the same Construction volume.

Durch die direkte Verbindung von äußerem Rotor und Schwingstator wird eine äußerst kompakte Bauweise und hohe Funktionssicherheit des Pumpenantriebs erreicht.Through the direct connection of the outer rotor and Vibration stator becomes an extremely compact design and high functional reliability of the pump drive achieved.

Um die für Kreiselpumpen charakteristischen hohen Drehzahlen zu erzeugen, kann der äußere Rotor auch über ein Getriebe mit dem Piezo-Wanderwellenmotor verbunden sein.To the high characteristic of centrifugal pumps The outer rotor can also generate speeds via a gearbox is connected to the piezo traveling wave motor be.

Ebenfalls vorteilhaft ist es, wenn die Piezo-Elemente des Piezo-Wanderwellenmotors an der Innenseite eines den äußeren Rotor umfassenden Teils befestigt sind. Auch ist es konstruktiv vorteilhaft, wenn die Piezo-Elemente an einer Scheibe befestigt sind, wobei die Scheibe an der die fördermediumsführende Seite von der Trockenseite des Motors trennenden Trennwand verdrehsicher anliegt. Auch können die Piezo-Elemente direkt am Pumpengehäuse angeordnet sein. Dies führt zu einer besonders kleinen Bauweise des Pumpenantriebs unter Verwendung weniger Bauteile.It is also advantageous if the piezo elements of the Piezo traveling wave motor on the inside of a den outer rotor comprising part are attached. It is also structurally advantageous if the Piezo elements are attached to a disc, the Washer on the side of the medium carrying the medium Partition separating the dry side of the motor rests against rotation. The piezo elements can also be arranged directly on the pump housing. this leads to a particularly small design of the pump drive under Use fewer components.

Die Trennwand sollte vorteilsmäßig zwischen dem Pumpengehäuse und dem die Piezo-Elemente tragenden Träger abdichtend einliegen, wobei die Trennwand insbesondere ein flaches Teil ist. Auch kann die Trennwand doppelwandig ausgebildet sein, so daß zwischen den Wänden der Trennwand ein Anzeigemedium angeordnet ist, das mit einem Außenanzeiger in Kontakt steht, wodurch eventuelle Beschädigungen der Trennwand frühzeitig erkannt werden.The partition should advantageously between the Pump housing and the support carrying the piezo elements lie sealingly, the partition in particular is a flat part. The partition can also be double-walled, so that between the walls the dividing wall is arranged a display medium that with is in contact with an external indicator, which means that any Damage to the partition can be detected early.

Eine konstruktiv einfache Ausführung des Pumpenantriebs ergibt sich, wenn an der als flaches Teil ausgebildeten Trennwand ein ein Lager tragendes Teil befestigt oder angeformt ist, wobei das Lager das Pumpenlaufrad drehbar hält.A structurally simple design of the pump drive arises when on the formed as a flat part Partition attached a bearing bearing part or is integrally formed, wherein the bearing rotates the pump impeller holds.

Die auf der fördermediumsführenden Seite angeordneten Magnete der Magnetkupplung sind dabei vorteilsmäßig an der der Trennwand zugewandten Seite des Pumpenlaufrades befestigt. Hierdurch entfällt der bei heutigen Kreiselpumpen notwendige, die Magnete tragende Läufer, wodurch sich nicht nur eine Gewichtsreduzierung, sondern auch eine höhere Funktionssicherheit der Pumpe ergibt. Die Magnete auf der Antriebsseite sind dann konstruktionsbedingt an der der Trennwand zugewandten Seite des vorteilsmäßig als Scheibe ausgebildeten Rotors befestigt.The arranged on the side carrying the medium Magnets of the magnetic coupling are advantageous the side of the pump impeller facing the partition attached. This eliminates the current one Centrifugal pumps necessary rotors carrying the magnets, which is not just a weight reduction, but also results in a higher functional reliability of the pump. The magnets on the drive side are then due to the construction on the partition facing Side of the rotor advantageously designed as a disc attached.

Eine ebenfalls konstruktiv einfache Ausführung des magnetischen Pumpenantriebs ergibt sich, wenn der Rotor von dem das Pumpengehäuse abschließenden Teil in Richtung der Piezo-Elemente druckbeaufschlagt wird, wobei zwischen dem Rotor und dem das Pumpengehäuse abschließenden Teils ein Gleit- oder Wälzlager, insbesondere in Form einer Tellerfeder und/oder einer Gummischeibe einliegt. Vorteilhaft ist es, wenn der äußere Rotor mittels einer Spannschraube, welche durch eine axiale Bohrung des äußeren Rotors greift, mit seiner dem Pumpenlaufrad abgewandten Seite an den Schwingstator des Piezo-Wanderwellenmotors gedrückt wird. Die Spannschraube erzeugt dabei die für einen Piezo-Wanderwellenmotor notwendige Andruckkraft zwischen Schwingstator und dem Kontaktbelag des Rotors.An also structurally simple execution of the magnetic pump drive arises when the rotor from the part closing the pump housing in the direction the piezo elements are pressurized, with between the rotor and the part that closes the pump housing a plain or roller bearing, especially in the form of a Disc spring and / or a rubber washer. It is advantageous if the outer rotor by means of a Clamping screw, which is through an axial bore of the outer rotor engages with its pump impeller facing away from the vibration stator of the Piezo traveling wave motor is pressed. The tension screw generates the for a piezo traveling wave motor necessary pressing force between the vibration stator and the Contact surface of the rotor.

Mögliche Ausführungsbeispiele eines magnetischen Pumpenantriebs mittels eines Piezo-Wanderwellenmotors werden anhand der Zeichnungen nachfolgend näher erläutert. Possible embodiments of a magnetic Pump drive by means of a piezo traveling wave motor will be closer to the drawings below explained.

Es zeigen:

Fig. 1
Eine Kreiselpumpe mit Spalttopf und dazugehöriger Magnetkupplung, bei der der äußere Rotor mittels eines Piezo-Wanderwellenmotors angetrieben wird.
Fig. 2
Eine Kreiselpumpe, bei der die Piezo-Elemente an einer an der Trennwand anliegenden Scheibe angeordnet sind.
Fig. 3
Eine Kreiselpumpe mit Piezo-Wanderwellenmotor, bei der die einen Magnete der Magnetkupplung direkt am Laufrad befestigt sind.
Fig. 4
Eine Kreiselpumpe, bei der der Gehäusedeckel den Rotor des Piezo-Wanderwellenmotors gegen die Piezo-Elemente drückt.
Fig. 5 und 6
Eine Kreiselpumpe, bei der die Trennwand als flache Scheibe ausgebildet ist.
Fig. 7 bis 9
Eine Kreiselpumpe mit Piezo-Wanderwellenantrieb, bei dem die zylindrische Oberfläche des Rotors im Schwingstator einliegt.
Show it:
Fig. 1
A centrifugal pump with a containment can and associated magnetic coupling, in which the outer rotor is driven by a piezo traveling wave motor.
Fig. 2
A centrifugal pump, in which the piezo elements are arranged on a disc abutting the partition.
Fig. 3
A centrifugal pump with a piezo traveling-wave motor, in which one magnet of the magnetic coupling is attached directly to the impeller.
Fig. 4
A centrifugal pump in which the housing cover presses the rotor of the piezo traveling wave motor against the piezo elements.
5 and 6
A centrifugal pump in which the partition is designed as a flat disc.
7 to 9
A centrifugal pump with a piezo traveling-shaft drive, in which the cylindrical surface of the rotor lies in the oscillating stator.

In Figur 1 ist eine Kreiselpumpe dargestellt, in deren Gehäuse 1 auf einer Welle 3 ein Pumpenlaufrad 2 lagert, wobei die Welle 3 sich mit ihrem einen Ende mittels des als Rollenlager ausgebildeten Lagers 13 an der Innenseite des Spalttopfes abstützt. Der auf der Welle 3 angeordnete innere Rotor 4 trägt an seiner zylindrischen Oberfläche Magnete 5, die mit dem am äußeren Rotor 6 angeordneten Magneten 7 eine Magnetkupplung bilden. Der Spalttopf 10 trennt die fördermediumsführende Seite 22 der Pumpe von der Trockenseite 21, in der sich der Piezo-Wanderwellenantrieb befindet.A centrifugal pump is shown in FIG Housing 1 a pump impeller 2 on a shaft 3, the shaft 3 is at one end by means of designed as a roller bearing 13 on the inside supports the containment shell. The one on wave 3 arranged inner rotor 4 carries on its cylindrical Surface magnets 5, which with the on the outer rotor 6th arranged magnets 7 form a magnetic coupling. Of the The containment can 10 separates the side 22 carrying the medium the pump from the dry side 21, in which the Piezo traveling wave drive is located.

Das Gehäuse 1 der Pumpe ist mit einem Deckel 14 verschlossen, wobei der Deckel 14 mittels Schrauben 15 am Gehäuse befestigt ist. Zwischen dem Deckel 14 und dem Gehäuse 1 und dem Spalttopf 10 liegt ein Dichtungsteil 17 ein. Der Spalttopf 10 kann doppelwandig gestaltet sein, so daß zwischen den beiden Wänden des Spalttopfes 10 ein Anzeigemedium 16 ist, welches mit einem nicht dargestellten, außen am Pumpengehäuse 1,14 befindlichen Anzeiger in Verbindung ist. Durch das im Spalttopf 10 befindliche Anzeigemedium 16 und den Anzeiger werden Beschädigungen des Spalttopfes 10 frühzeitig angezeigt.The housing 1 of the pump has a cover 14 closed, the cover 14 by means of screws 15 on Housing is attached. Between the lid 14 and the Housing 1 and the containment shell 10 is a sealing part 17th on. The containment can 10 can be double-walled, so that between the two walls of the can 10 Display medium 16 is, which with a not shown, located on the outside of the pump housing 1.14 Indicator is connected. In the can 10 located display medium 16 and the indicator Damage to the containment shell 10 indicated early.

Mittels einer Spannschraube 18 und den dazugehörigen Muttern 19 und Tellerfedern 20 wird der äußere Rotor 6 mit seiner Kontaktfläche gegen den als Scheibe ausgebildeten Schwingstator 9 gedrückt, wobei der Schwingstator 9 mit seiner anderen Seite an den Piezo-Elementen 8 anliegt, und die Piezo-Elemente 8 an der Innenseite des Gehäusedeckels 14 befestigt sind. Zwischen der Mutter 19 und dem äußeren Rotor 6 liegt ei Gleitlager, bestehend aus einer Gummischeibe 11 und ein Tellerfeder 11a, ein.By means of a clamping screw 18 and the associated The outer rotor 6 becomes nuts 19 and disc springs 20 with its contact surface against that as a disc trained vibration stator 9 pressed, the Vibration stator 9 with its other side to the Piezo elements 8 is applied, and the piezo elements 8 are applied the inside of the housing cover 14 are attached. There is egg between the nut 19 and the outer rotor 6 Plain bearing, consisting of a rubber washer 11 and a Disc spring 11a, a.

Durch die im Schwingstator 9 von den Piezo-Elementen 8 angeregte Wanderwelle greift die Wanderwelle mit ihren dem Rotor 6 zugewandten Wellenbergen in die nicht dargestellte Kontaktschicht bzw. Haftschicht, die am Rotor 6 angebracht ist, ein und versetzt den äußeren Rotor 6 in Drehbewegung. Mittels der Magnetkupplung 5,7 wird ein Drehmoment auf die Welle 3 und somit auf das Pumpenlaufrad 2 übertragen.By the piezo elements 8 in the vibration stator 9 excited traveling wave attacks the traveling wave with their the wave crests facing the rotor 6 in the illustrated contact layer or adhesive layer, which on Rotor 6 is attached, and offset the outer Rotor 6 rotates. Using the magnetic coupling 5.7 is a torque on the shaft 3 and thus on the Transfer pump impeller 2.

Die Figur 2 zeigt eine weitere Ausführungsform einer Kreiselpumpe mit Piezo-Wanderwellenantrieb. Der äußere Rotor 6 ist jetzt ringförmig, wobei der Gehäusedeckel 1 den Rotor 6 in Richtung Schwingstator 9 und Piezo-Elemente 8 druckbeaufschlagt. Zwischen dem Gehäusedeckel 14 und dem Rotor 6 liegt ein Gleitlager, bestehend aus einer Gummischeibe 11 und einer Tellerfeder 11a, ein. Die Piezo-Elemente 8 sind auf ein Scheibe 23 angeordnet, die zwischen dem Gehäusedeckel 1 und dem als Spalttopf ausgebildeten Trennkörper 10 verdrehsicher einliegt und verformen sich durch die an sie gelegte Spannung in axialer Richtung und erzeugen im Schwingstator 9 die erforderliche Wanderwelle. Die äußeren Magnete 7 der Magnetkupplung 5,7 sind an der Innenseite des ringförmig ausgebildeten Rotors 6 angeordnet.
Figur 3 zeigt ein weiteres Ausführungsbeispiel einer Kreiselpumpe mit Piezo-Wanderwellenantrieb, wobei die Piezo-Elemente 8 auf einer Scheibe 23 angeordnet sind, die mittels Schrauben 24 im Gehäusedeckel 14 befestigt ist und die Scheibe 23 mittels einer Spannschraube 18 und den dazugehörigen Muttern 19 mit ihren Piezo-Elementen 8 und dem Schwingstator 9 fest gegen den Rotor 6 in axialer Richtung gedrückt wird.FIG. 2 shows a further embodiment of a centrifugal pump with a piezo traveling shaft drive. The outer rotor 6 is now ring-shaped, with the housing cover 1 pressurizing the rotor 6 in the direction of the vibrating stator 9 and piezo elements 8. Between the housing cover 14 and the rotor 6 is a slide bearing, consisting of a rubber washer 11 and a plate spring 11a. The piezo elements 8 are arranged on a disk 23, which rests against rotation between the housing cover 1 and the separating body 10 designed as a containment shell, and deform in the axial direction due to the voltage applied to them and generate the required traveling wave in the oscillating stator 9. The outer magnets 7 of the magnetic coupling 5, 7 are arranged on the inside of the ring-shaped rotor 6.
Figure 3 shows a further embodiment of a centrifugal pump with a piezo traveling shaft drive, the piezo elements 8 being arranged on a disk 23 which is fastened in the housing cover 14 by means of screws 24 and the disk 23 by means of a tensioning screw 18 and the associated nuts 19 with their Piezo elements 8 and the vibration stator 9 is pressed firmly against the rotor 6 in the axial direction.

Der Spalttopf 10 ist derart gestaltet, daß er eine ringförmige Ausnehmung aufweist, in der der Rotor 6 mit seinen Magneten 7 eingreift und einer weiteren zentrischen, zur Fördermediumsseite 22 geöffneten Ausnehmung, in der die das Laufrad 2 tragende Welle 3 über das Lager 13 gelagert ist. Die mit den Magneten 7 korrespondierenden Magnete 5 sind unmittelbar an der dem Spalttopf 10 zugewandten Seite des Laufrades 2 befestigt.The can 10 is designed such that it is a has an annular recess in which the rotor 6 with engages his magnet 7 and another centric, open to the medium side 22 Recess in which the shaft 3 carrying the impeller 2 is stored on the bearing 13. The one with the magnets 7 corresponding magnets 5 are directly on the Can 10 facing side of impeller 2 attached.

Figur 4 zeigt eine Kreiselpumpe mit einem Piezo-Wanderwellenantrieb, bei dem die mit dem Schwingstator 9 korrespondierende Haftschicht des Rotors 6 und die Magnete 7 der Magnetkupplung 5,7 auf der pumpenzugewandten Seite des Rotors 6 befestigt sind. Der Gehäusedeckel 14 drückt über ein Gleitlager, insbesondere bestehend aus einer Gummischeibe 11 und einer Tellerfeder lla, den Rotor 6 mittels der Schrauben 15 fest gegen den Schwingstator 9. Die Piezo-Elemente 8 sind auf einer Ringscheibe 23 angeordnet, die zwischen dem Gehäuse 1 und dem Schwingstator 9 einliegt.Figure 4 shows a centrifugal pump with a Piezo traveling wave drive, in which the with the Vibration stator 9 corresponding adhesive layer of the rotor 6 and the magnets 7 of the magnetic coupling 5.7 on the pump-facing side of the rotor 6 are attached. Of the Housing cover 14 presses over a slide bearing, in particular consisting of a rubber washer 11 and a plate spring lla, the rotor 6 by means of the screws 15 against the Vibration stator 9. The piezo elements 8 are on one Washer 23 arranged between the housing 1 and the vibrating stator 9.

Die Trennwand weist im Gegensatz zur Ausführung nach Figur 3 nur eine Ausnehmung auf, die das Lager 13 hält, in dem die mit dem Pumpenlaufrad 2 drehbar verbundene Welle 3 gelagert ist.In contrast to the design, the partition demonstrates 3 shows only one recess which holds the bearing 13, in which the rotatably connected to the pump impeller 2 Shaft 3 is mounted.

Figur 5 zeigt eine Kreiselpumpe, bei der der Trennkörper 10 eine flache Scheibe, insbesondere eine doppelwandige Scheibe ist, an der auf der fördermediumsführenden Seite eine Hülse 12 angeformt oder befestigt ist, die an ihrer Innenseite ein Lager 13, insbesondere ein Rollenlager hat, in dem die das Pumpenlaufrad 2 tragende Welle 3 drehbar einliegt.Figure 5 shows a centrifugal pump in which the separating body 10 a flat disc, in particular a double-walled one Washer is on the side on the conveying medium a sleeve 12 is molded or attached to her Inside a bearing 13, in particular a roller bearing in which the shaft 3 carrying the pump impeller 2 rotatable.

In Figur 6 ist eine Kreiselpumpe dargestellt, bei der der Gehäusedeckel 14 eine flache Scheibe ist, die mittels der Schrauben 15 über das Gleitlager 11,11a den Rotor 6 gegen den Schwingstator 9 und die Piezo-Elemente 8 drückt, wobei zwischen den Piezo-Elementen 8 und dem Gehäuse 1 der Trennkörper 10 abdichtend einliegt und an dem Trennkörper 10 ein Körper 3 angeformt ist, der insbesondere zylindrisch ist und an seiner Außenfläche ein Lager 13 hat, auf dem das Pumpenlaufrad 2 drehbar gelagert ist.In Figure 6, a centrifugal pump is shown in which the Housing cover 14 is a flat disc, which by means of Screws 15 over the slide bearing 11, 11a against the rotor 6 presses the vibration stator 9 and the piezo elements 8, being between the piezo elements 8 and the housing 1 the separating body 10 lies sealingly and on the Separating body 10 is a body 3 is formed, the is particularly cylindrical and on its outer surface has a bearing 13 on which the pump impeller 2 is rotatable is stored.

Figur 7 zeigt eine Kreiselpumpe mit einem Piezo-Wanderwellenantrieb, bei dem die Piezo-Elemente 8 an einer zylindrischen Innenfläche des Gehäusedeckels 14 einliegen, wobei sich die Piezo-Elemente 8 in radialer Richtung durch Anlegen einer äußeren Spannung ausdehnen bzw. zusammenziehen, und dadurch den Schwingstator 9 in Resonanz versetzen. In dem als zylindrische Hülse geformten Schwingstator 9 liegt der Rotor 6 ein, wobei der Rotor 6 mit seiner an seiner zylindrischen Oberfläche befindlichen Haftschicht im Schwingstator 9 einliegt.Figure 7 shows a centrifugal pump with a Piezo traveling wave drive, in which the piezo elements 8 on a cylindrical inner surface of the housing cover 14 lie in, the piezo elements 8 in radial Extend the direction by applying an external voltage or contract, and thereby the vibration stator 9 in Give resonance. In the as a cylindrical sleeve Shaped vibration stator 9, the rotor 6 is a, wherein the rotor 6 with its cylindrical surface located adhesive layer in the vibration stator 9.

Die an der Innenseite des Schwingstators ausgebildeten Wellenberge der durch die Resonanz entstandenen Wanderwellen greifen in die Kontaktschicht bzw. Haftschicht des Rotors 6 ein und versetzen diesen in Drehung. An der Innenseite des ebenfalls hülsenförmigen Rotors 6 liegen die Magnete 7 der Magnetkupplung 5,7 ein und wirken mit den Magneten 5 zusammen, welche außen am Rotor 4 befestigt sind, wodurch das Pumpenrad ebenfalls in Drehung versetzt wird.Those formed on the inside of the vibration stator Wave crests of those created by the resonance Traveling waves reach into the contact layer or Adhesive layer of the rotor 6 and put this in Rotation. On the inside of the also sleeve-shaped Rotor 6 are the magnets 7 of the magnetic coupling 5,7 and interact with the magnets 5, which are on the outside Rotor 4 are attached, which also causes the impeller is rotated.

Die Figuren 8 und 9 zeigen eine Kreiselpumpe mittels eines Piezo-Wanderwellenmotors, bei der die Magnetkupplung 5,7 in axialer Richtung durch einen Trennkörper 10 wirkt. Dabei sind die Magnete 5 an der dem Trennkörper 10 zugewandten Seite des Laufrades 2 befestigt. Die Magnete 7 sind an der dem Pumpenlaufrad 2 zugewandten Seite des scheiben- oder ringförmigen Rotors 6 angeordnet. Der Rotor 6 liegt ganz oder abschnittsweise mit seiner zylindrischen Oberfläche an dem als Hülse ausgebildeten Schwingstator 9 mit seiner Kontaktschicht an. Die Piezo-Elemente 8 liegen dabei ringförmig in dem Gehäusedeckel 14 oder dem Pumpengehäuse 1 ein. Die Oberfläche des Rotors 6 und des als Hülse geformten Schwingstators 9 sind gebogen, insbesondere konkav oder konvex ausgeführt, wodurch der Rotor 6 in axialer Richtung vom Schwingstator 9 gehalten wird. Dabei kann entweder die Oberfläche des Rotors 6 oder die Oberflächenform des Schwingstators 9 zumindest teilweise konkav oder konvex sein.Figures 8 and 9 show a centrifugal pump of a piezo traveling wave motor, in which the Magnetic coupling 5,7 in the axial direction by a Separating body 10 acts. The magnets 5 are on the Separating body 10 facing side of the impeller 2 attached. The magnets 7 are on the pump impeller 2 facing side of the disc or ring-shaped rotor 6 arranged. The rotor 6 lies entirely or in sections with its cylindrical surface on the as a sleeve trained vibration stator 9 with its contact layer on. The piezo elements 8 lie in a ring in the Housing cover 14 or the pump housing 1. The Surface of the rotor 6 and the sleeve-shaped Vibration stators 9 are curved, in particular concave or executed convex, which makes the rotor 6 in axial Direction is held by the vibrating stator 9. It can either the surface of the rotor 6 or the Surface shape of the vibration stator 9 at least partially be concave or convex.

Claims (18)

  1. A magnetic pump drive having a pump casing and an outer rotor (6) which is driven by a motor and drives an inner rotor (3, 4) via magnets (5, 7), while between the outer and inner rotors there is a gap in which a partition (10) is received which separates the pumping-medium-carrying side from the dry side of the motor, characterised in that the outer rotor (6) is driven by a travelling wave piezo electric motor, the outer rotor (6) bearing via a contact layer applied thereto against a oscillating stator (9) of the travelling wave motor.
  2. A magnetic pump drive according to claim 1, characterised in that the piezo elements (8) of the travelling piezo electric motor are attached to the inside of a member (14) engaging around the outer rotor (6).
  3. A magnetic pump drive according to claims 1 or 2, characterised in that the piezo elements (8) are attached to one side of a disc (23), the other side of the disc (23) bearing non-rotatably against the partition (10).
  4. A magnetic pump drive according to one of the preceding claims, characterised in that the piezo elements (8) are attached to the pump casing (1).
  5. A magnetic pump drive according to one of the preceding claims, characterised in that the partition (10) is sealably received between the pump casing (1) and the support (14, 23) bearing the piezo elements (8).
  6. A magnetic pump drive according to one of the preceding claims, characterised in that the partition (10) is a flat member.
  7. A magnetic pump drive according to claim 6, characterised in that the partition (10) is double-walled.
  8. A magnetic pump drive according to claims 6 and 7, characterised in that disposed between the walls of the partition (10) is a display medium (16) which is in contact with an external indicator.
  9. A magnetic pump drive according to one of claims 7 to 8, the pump drive being attached to a pump having a pump impeller, characterised in that attached to or formed on the partition (10) is a member (12) bearing a bearing (13), the bearing (13) rotatably rotating a pump impeller (2).
  10. A magnetic pump drive according to one of the preceding claims, characterised in that the magnets (5, 7) of the magnetic coupling are disposed opposite one another in the axial direction.
  11. A magnet pump drive according to one of the preceding claims, wherein the pump drive is attached to a pump which has a pump impeller, characterised in that the magnets (5) of the magnetic clutch are attached to the side of the pump impeller (2) adjacent the partition (10).
  12. A magnetic pump drive according to one of the preceding claims, characterised in that the magnets (7) are attached to the side of the disc-shaped rotor (6) adjacent the partition (10).
  13. A magnetic pump drive according to one of the preceding claims, characterised in that a plain or anti-friction bearing (11, 11a) is received between the rotor (6) and a member (24).
  14. A magnetic pump drive according to one of the preceding claims, characterised in that a cup spring (11) and/or a rubber disc (lla) is received between the rotor (6) and the member (24).
  15. A magnetic pump drive according to claims 13 or 14, characterised in that the tightening screw (18), which engages through an axial bore in the outer rotor (6), forces the rotor (6) by its side remote from the pump impeller (2) against the oscillating stator (9) of the travelling wave piezo electric motor.
  16. A magnetic pump drive according to claims 13 or 14, characterised in that the rotor (6) is forced in the direction of the piezo elements (8) by a member (24) which closes the pump casing (1).
  17. A magnetic pump drive according to one of the preceding claims, characterised in that the rotor (6) is mounted positively in the axial direction by means of the oscillating stator (9).
  18. A magnetic pump drive according to claim 17, characterised in that the generated surface of the rotor (6) is constructed at least partially concave or convex, and the inner surface of the oscillating stator (9) is constructed convex with a concave generated surface of the rotor (6), and concave with a convex generated surface of the rotor (6).
EP95119281A 1994-12-28 1995-12-07 Travelling wave piezo electric motor for canned motor pumps with magnetic coupling Expired - Lifetime EP0719938B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4446915 1994-12-28
DE4446915A DE4446915A1 (en) 1994-12-28 1994-12-28 Magnetic pump drive

Publications (2)

Publication Number Publication Date
EP0719938A1 EP0719938A1 (en) 1996-07-03
EP0719938B1 true EP0719938B1 (en) 1999-06-02

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Application Number Title Priority Date Filing Date
EP95119281A Expired - Lifetime EP0719938B1 (en) 1994-12-28 1995-12-07 Travelling wave piezo electric motor for canned motor pumps with magnetic coupling

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EP (1) EP0719938B1 (en)
DE (2) DE4446915A1 (en)

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US6034465A (en) * 1997-08-06 2000-03-07 Shurfle Pump Manufacturing Co. Pump driven by brushless motor
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CN1258607A (en) * 2000-01-21 2000-07-05 陈缨 Leakless automobile water pump driven through a permanent magnetic coupling
DE10012662B4 (en) * 2000-03-15 2010-11-04 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Merbelsrod Coolant pump with electrically commutated electric motor
DE10012663B4 (en) * 2000-03-15 2012-08-02 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Merbelsrod Coolant pump with electronically commutated electric motor
US20140246960A1 (en) * 2013-03-04 2014-09-04 Stephen Smith Energy transfer system and method
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CN110080992A (en) * 2019-04-24 2019-08-02 南京航空航天大学 A kind of patch type traveling wave piezoelectricity centrifugal pump and its driving method
CN110425149A (en) * 2019-07-29 2019-11-08 南京航空航天大学 A kind of two-stage sandwich traveling wave piezoelectricity centrifugal pump and its driving method

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DE4446915A1 (en) 1996-07-04
DE59506097D1 (en) 1999-07-08
EP0719938A1 (en) 1996-07-03

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