EP0719938A1 - 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 PDFInfo
- Publication number
- EP0719938A1 EP0719938A1 EP95119281A EP95119281A EP0719938A1 EP 0719938 A1 EP0719938 A1 EP 0719938A1 EP 95119281 A EP95119281 A EP 95119281A EP 95119281 A EP95119281 A EP 95119281A EP 0719938 A1 EP0719938 A1 EP 0719938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- drive according
- pump drive
- magnetic pump
- piezo
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/021—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0666—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, which drives an inner rotor via a magnetic coupling, wherein there is a gap between the outer and inner rotor, in which there is a partition that separates the medium carrying side from the dry side of the motor .
- Such magnetic pump drives are well known and are used in particular for centrifugal pumps.
- a containment shell separates the side that carries the medium from the drive side of the pump.
- the motors used today to drive pumps are mainly based on the electromagnetic principle.
- electric motors have the major disadvantage that they are complicated to manufacture and relatively large stator and rotor windings are necessary to generate high torques and develop high operating temperatures due to the electrical and magnetic losses. Due to the large dimensions of such an electric motor, based on the conventional electromagnetic principle, today's centrifugal pump drives are relatively large.
- the object of the invention is therefore to provide a novel drive system for centrifugal pumps, which ensures a compact design and high functional reliability with small dimensions.
- the object is achieved in that the outer rotor is driven by a piezo traveling wave motor.
- the great advantage of a piezo traveling wave motor compared to conventional electric motors based on the electromagnetic principle is a comparatively larger torque with the same overall volume.
- the outer rotor of the pump lies closely against an oscillating stator of the traveling wave motor.
- the direct connection of the outer rotor and the vibrating stator results in an extremely compact design and high functional reliability of the pump drive.
- the outer rotor can also be connected to the piezo traveling wave motor via a gear.
- the piezo elements of the piezo traveling wave motor are attached to the inside of a part comprising the outer rotor.
- the piezo elements are fastened to a disk, the disk abutting against rotation on the partition wall separating the medium carrying side from the dry side of the motor.
- the piezo elements can also be arranged directly on the pump housing. This leads to a particularly small design of the pump drive using fewer components.
- the partition should advantageously lie sealingly between the pump housing and the carrier carrying the piezo elements, the partition being in particular a flat part.
- the partition can also be double-walled, so that a display medium is arranged between the walls of the partition, which is in contact with an external indicator, whereby any damage to the partition can be detected early.
- a structurally simple design of the pump drive is obtained if a part carrying a bearing is attached or formed on the partition formed as a flat part, the bearing holding the pump impeller rotatably.
- the magnets of the magnetic coupling arranged on the conveying medium-carrying side are advantageously attached to the side of the pump impeller facing the partition. This eliminates the rotor that carries the magnets, which is necessary in today's centrifugal pumps, which not only results in a weight reduction, but also a higher functional reliability of the pump.
- the magnets on the drive side are then, by design, attached to the side of the rotor which is advantageously designed as a disk and faces the partition.
- a likewise structurally simple design of the magnetic pump drive is obtained when the rotor is pressurized by the part that closes the pump housing in the direction of the piezo elements, with a sliding or rolling bearing, in particular in the form of a plate spring, between the rotor and the part that closes the pump housing and / or a rubber washer.
- the outer rotor is pressed with its side facing away from the pump impeller against the oscillating stator of the piezo traveling-wave motor by means of a clamping screw which extends through an axial bore of the outer rotor.
- the clamping screw generates the contact pressure required for a piezo traveling wave motor between the vibrating stator and the contact surface of the rotor.
- FIG. 1 shows a centrifugal pump, in the housing 1 of which a pump impeller 2 is supported on a shaft 3, the shaft 3 being supported at one end by means of the bearing 13 designed as a roller bearing on the inside of the can.
- the inner rotor 4 arranged on the shaft 3 carries magnets 5 on its cylindrical surface, which form a magnetic coupling with the magnet 7 arranged on the outer rotor 6.
- the containment can 10 separates the side 22 of the pump carrying the conveying medium from the dry side 21, in which the piezo traveling wave drive is located.
- the housing 1 of the pump is closed with a cover 14, the cover 14 being fastened to the housing by means of screws 15. Between the cover 14 and the housing 1 and the containment shell 10 there is a sealing part 17.
- the containment can 10 can be double-walled, so that between the two walls of the can 10 there is a display medium 16 which is connected to an indicator (not shown) located on the outside of the pump housing 1, 14. Due to the display medium 16 and the indicator located in the can 10, damage to the can 10 is indicated at an early stage.
- the outer rotor 6 is pressed with its contact surface against the vibration stator 9 designed as a disc, the other side of the vibration stator 9 abutting the piezo elements 8 and the piezo elements 8 are attached to the inside of the housing cover 14.
- a slide bearing consisting of a rubber washer 11 and a plate spring 11a.
- the traveling wave excited in the vibration stator 9 by the piezo elements 8 Due to the traveling wave excited in the vibration stator 9 by the piezo elements 8, the traveling wave with its wave crests facing the rotor 6 engages in the contact layer or adhesive layer, not shown, which is attached to the rotor 6, and sets the outer rotor 6 in rotary motion. A torque is transmitted to the shaft 3 and thus to the pump impeller 2 by means of the magnetic coupling 5, 7.
- 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.
- 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 containment shell 10 is designed in such a way that it has an annular recess in which the rotor 6 engages with its magnets 7 and a further central recess which is open toward the conveying medium side 22 and in which the shaft 3 carrying the impeller 2 is mounted via the bearing 13 .
- the magnets 5 corresponding to the magnets 7 are attached directly to the side of the impeller 2 facing the containment shell 10.
- FIG. 4 shows a centrifugal pump with a piezo traveling-wave drive, in which the adhesive layer of the rotor 6 corresponding to the vibration stator 9 and the magnets 7 of the magnetic coupling 5, 7 are fastened on the side of the rotor 6 facing the pump.
- the housing cover 14 presses the rotor 6 by means of the screws 15 against the vibration stator 9 via a slide bearing, in particular consisting of a rubber washer 11 and a plate spring 11a.
- the piezo elements 8 are arranged on an annular disk 23 which is between the housing 1 and the Vibration stator 9 is inserted.
- the partition wall has only one recess, which holds the bearing 13, in which the shaft 3, which is rotatably connected to the pump impeller 2, is mounted.
- Figure 5 shows a centrifugal pump, in which the separating body 10 is a flat disk, in particular a double-walled disk, on which a sleeve 12 is formed or fastened on the side carrying the conveying medium and has a bearing 13, in particular a roller bearing, on its inside in which the shaft 3 carrying the pump impeller 2 rotatably lies.
- the separating body 10 is a flat disk, in particular a double-walled disk, on which a sleeve 12 is formed or fastened on the side carrying the conveying medium and has a bearing 13, in particular a roller bearing, on its inside in which the shaft 3 carrying the pump impeller 2 rotatably lies.
- FIG. 6 shows a centrifugal pump in which the housing cover 14 is a flat disk which, by means of the screws 15, presses the rotor 6 against the oscillating stator 9 and the piezo elements 8 via the slide bearing 11, 11a, between the piezo elements 8 and the housing 1 of the separating body 10 lies sealingly and on the separating body 10 a body 3 is formed, which is in particular cylindrical and has a bearing 13 on its outer surface, on which the pump impeller 2 is rotatably mounted.
- FIG. 7 shows a centrifugal pump with a piezo traveling shaft drive, in which the piezo elements 8 lie on a cylindrical inner surface of the housing cover 14, the piezo elements 8 expanding or contracting in the radial direction by applying an external voltage, and thereby Vibrate stator 9 in resonance.
- the rotor 6 lies in the oscillating stator 9, which is shaped as a cylindrical sleeve, the rotor 6 with its adhesive layer located on its cylindrical surface lying in the oscillating stator 9.
- the magnets 7 of the magnetic coupling 5, 7 lie on the inside of the likewise sleeve-shaped rotor 6 and cooperate with the magnets 5, which are attached to the outside of the rotor 4, whereby the pump wheel is also set in rotation.
- FIGS. 8 and 9 show a centrifugal pump by means of a piezo traveling wave motor, in which the magnetic coupling 5, 7 acts through a separating body 10 in the axial direction.
- the magnets 5 are attached to the side of the impeller 2 facing the separating body 10.
- the magnets 7 are arranged on the side of the disk-shaped or ring-shaped rotor 6 facing the pump impeller 2.
- the rotor 6 bears in whole or in part with its cylindrical surface on the vibration stator 9 formed as a sleeve with its contact layer.
- 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 vibration stator 9 shaped as a sleeve are curved, in particular concave or convex, whereby the rotor 6 is held in the axial direction by the vibration stator 9.
- Either the surface of the rotor 6 or the surface shape of the vibration stator 9 can be at least partially concave or convex.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
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, which drives an inner rotor via a magnetic coupling, wherein there is a gap between the outer and inner rotor, in which there is a partition that separates the medium carrying side from the dry side of the motor .
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 well known and are used in particular for centrifugal pumps. A containment shell separates the side that carries the medium from the drive side of the pump.
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. However, as is known, electric motors have the major disadvantage that they are complicated to manufacture and relatively large stator and rotor windings are necessary to generate high torques and develop high operating temperatures due to the electrical and magnetic losses. Due to the large dimensions of such an electric motor, based on the conventional electromagnetic principle, today's centrifugal pump drives are relatively large.
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 to provide a novel drive system for centrifugal pumps, which ensures a compact design and high functional reliability with small dimensions.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß der äußere Rotor von einem Piezo-Wanderwellenmotor angetrieben wird. Der große Vorteil eines Piezo-Wanderwellenmotors gegenüber herkömmlichen, auf dem elektromagnetischen Prinzip basierenden Elektromotoren ist dabei ein vergleichsweise größeres Drehmoment bei gleichem Bauvolumen.The object is achieved in that the outer rotor is driven by a piezo traveling wave motor. The great advantage of a piezo traveling wave motor compared to conventional electric motors based on the electromagnetic principle is a comparatively larger torque with the same overall volume.
Vorteilhaft ist es, wenn der äußere Rotor der Pumpe eng an einem Schwingstator des Wanderwellenmotors anliegt. Durch die direkte Verbindung von äußerem Rotor und Schwingstator wird eine äußerst kompakte Bauweise und hohe Funktionssicherheit des Pumpenantriebs erreicht.It is advantageous if the outer rotor of the pump lies closely against an oscillating stator of the traveling wave motor. The direct connection of the outer rotor and the vibrating stator results in an extremely compact design and high functional reliability of the pump drive.
Um die für Kreiselpumpen charakteristischen hohen Drehzahlen zu erzeugen, kann der äußere Rotor auch über ein Getriebe mit dem Piezo-Wanderwellenmotor verbunden sein.In order to generate the high speeds characteristic of centrifugal pumps, the outer rotor can also be connected to the piezo traveling wave motor via a gear.
Ebenfalls vorteilhaft ist es, wenn die Piezo-Elemente des Piezo-Wanderwellenmotors an der Innenseite eines den äußeren Rotor umfassenden Teils befestigt sind.It is also advantageous if the piezo elements of the piezo traveling wave motor are attached to the inside of a part comprising the outer rotor.
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 structurally advantageous if the piezo elements are fastened to a disk, the disk abutting against rotation on the partition wall separating the medium carrying side from the dry side of the motor. The piezo elements can also be arranged directly on the pump housing. This leads to a particularly small design of the pump drive using 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 lie sealingly between the pump housing and the carrier carrying the piezo elements, the partition being in particular a flat part. The partition can also be double-walled, so that a display medium is arranged between the walls of the partition, which is in contact with an external indicator, whereby 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 is obtained if a part carrying a bearing is attached or formed on the partition formed as a flat part, the bearing holding the pump impeller rotatably.
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 magnets of the magnetic coupling arranged on the conveying medium-carrying side are advantageously attached to the side of the pump impeller facing the partition. This eliminates the rotor that carries the magnets, which is necessary in today's centrifugal pumps, which not only results in a weight reduction, but also a higher functional reliability of the pump. The magnets on the drive side are then, by design, attached to the side of the rotor which is advantageously designed as a disk and faces the partition.
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.A likewise structurally simple design of the magnetic pump drive is obtained when the rotor is pressurized by the part that closes the pump housing in the direction of the piezo elements, with a sliding or rolling bearing, in particular in the form of a plate spring, between the rotor and the part that closes the pump housing and / or a rubber washer. It is advantageous if the outer rotor is pressed with its side facing away from the pump impeller against the oscillating stator of the piezo traveling-wave motor by means of a clamping screw which extends through an axial bore of the outer rotor. The clamping screw generates the contact pressure required for a piezo traveling wave motor between the vibrating 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 exemplary embodiments of a magnetic pump drive by means of a piezo traveling wave motor are explained in more detail below with reference to the drawings.
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.
- 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.FIG. 1 shows a centrifugal pump, in the
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
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
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.Due to the traveling wave excited in the
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.FIG. 2 shows a further embodiment of a centrifugal pump with a piezo traveling shaft drive. The
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.Figure 3 shows a further embodiment of a centrifugal pump with a piezo traveling shaft drive, the
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
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 11a, 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.FIG. 4 shows a centrifugal pump with a piezo traveling-wave drive, in which the adhesive layer of the
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 embodiment according to FIG. 3, the partition wall has only one recess, which holds the
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
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.FIG. 6 shows a centrifugal pump in which the
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 shaft drive, in which the
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.The wave crests formed on the inside of the vibration stator of the traveling waves generated by the resonance engage in the contact layer or adhesive layer of the
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.FIGS. 8 and 9 show a centrifugal pump by means of a piezo traveling wave motor, in which the
Claims (20)
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 true EP0719938A1 (en) | 1996-07-03 |
EP0719938B1 EP0719938B1 (en) | 1999-06-02 |
Family
ID=6537328
Family Applications (1)
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 |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0719938B1 (en) |
DE (2) | DE4446915A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999008366A1 (en) * | 1997-08-06 | 1999-02-18 | Shurflo Pump Manufacturing Co. | Pump driven by brushless motor |
US6132186A (en) * | 1997-08-06 | 2000-10-17 | Shurflo Pump Manufacturing Co. | Impeller pump driven by a dynamo electric machine having a stator comprised of a mass of metal particles |
WO2001053703A1 (en) * | 2000-01-21 | 2001-07-26 | Chen, Ying | Leakageless water pump with magnetic power transmitting |
DE19627145C2 (en) * | 1996-07-05 | 2003-05-28 | Andreas Hilker | clutch |
US20140246962A1 (en) * | 2013-03-04 | 2014-09-04 | Stephen Smith | Energy transfer system and method |
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 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE102014224151A1 (en) | 2014-11-26 | 2016-06-02 | Mahle International Gmbh | Device for non-contact transmission of rotational movements |
DE102015223338A1 (en) * | 2015-11-25 | 2017-06-01 | Mahle International Gmbh | Magnetic coupling, in particular for a waste heat utilization device |
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1994
- 1994-12-28 DE DE4446915A patent/DE4446915A1/en not_active Withdrawn
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1995
- 1995-12-07 EP EP95119281A patent/EP0719938B1/en not_active Expired - Lifetime
- 1995-12-07 DE DE59506097T patent/DE59506097D1/en not_active Expired - Fee Related
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EP0279220A2 (en) * | 1987-02-14 | 1988-08-24 | Richter Chemie-Technik GmbH | Leakage indicating device for a magnetic centrifugal pump |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19627145C2 (en) * | 1996-07-05 | 2003-05-28 | Andreas Hilker | clutch |
WO1999008366A1 (en) * | 1997-08-06 | 1999-02-18 | Shurflo Pump Manufacturing Co. | Pump driven by brushless motor |
US6034465A (en) * | 1997-08-06 | 2000-03-07 | Shurfle Pump Manufacturing Co. | Pump driven by brushless motor |
US6132186A (en) * | 1997-08-06 | 2000-10-17 | Shurflo Pump Manufacturing Co. | Impeller pump driven by a dynamo electric machine having a stator comprised of a mass of metal particles |
US6347929B1 (en) | 1997-08-06 | 2002-02-19 | David J. Cooper | Dynamo electric machines and stators for use in same |
US6776590B2 (en) | 1997-08-06 | 2004-08-17 | Shurflo Pump Manufacturing Company, Inc. | Dynamo electric machines and stators for use in same |
WO2001053703A1 (en) * | 2000-01-21 | 2001-07-26 | Chen, Ying | Leakageless water pump with magnetic power transmitting |
US20140246962A1 (en) * | 2013-03-04 | 2014-09-04 | Stephen Smith | Energy transfer system and method |
US20140246960A1 (en) * | 2013-03-04 | 2014-09-04 | Stephen Smith | Energy transfer system and method |
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 |
Also Published As
Publication number | Publication date |
---|---|
DE4446915A1 (en) | 1996-07-04 |
EP0719938B1 (en) | 1999-06-02 |
DE59506097D1 (en) | 1999-07-08 |
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