WO1988003993A1 - Pump for liquid media - Google Patents

Pump for liquid media Download PDF

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Publication number
WO1988003993A1
WO1988003993A1 PCT/DE1987/000550 DE8700550W WO8803993A1 WO 1988003993 A1 WO1988003993 A1 WO 1988003993A1 DE 8700550 W DE8700550 W DE 8700550W WO 8803993 A1 WO8803993 A1 WO 8803993A1
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WO
WIPO (PCT)
Prior art keywords
pump
tube
rotor
medium
inlet
Prior art date
Application number
PCT/DE1987/000550
Other languages
German (de)
French (fr)
Inventor
Heinz Turbanisch
Original Assignee
Heinz Turbanisch
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 Heinz Turbanisch filed Critical Heinz Turbanisch
Publication of WO1988003993A1 publication Critical patent/WO1988003993A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0646—Units comprising pumps and their driving means the pump being electrically driven the hollow pump or motor shaft being the conduit for the working fluid

Definitions

  • the invention relates to a pump of the type described in the preamble of claim 1, known from DE-GM 19 51 826
  • Conventional pumps essentially consist of two components, namely a drive motor and a gyroscope device coupled to the output shaft of the motor, which effects the circulation of the liquid medium by means of fins or a gyroscope.
  • the medium is rotated by 90 °.
  • This has the disadvantage that part of the power expended is already lost within the system, which consequently results in a loss of pressure or thrust.
  • several such pumps can only be connected in series with considerable effort, since the output must be dimensioned much smaller.
  • specially designed channels must be installed for cooling.
  • a pump which essentially comprises a stator having a stator winding and a coaxial tube-shaped rotor therein.
  • the rotor here comprises a rotor winding and a short-circuit ring. Since the rotor has to take up the rotor winding, one is proportional
  • a magnetic tube is used as a rotor according to the invention, a rotor winding and a short-circuit ring can be dispensed with. In addition, no separate cooling measures are required, since the medium flowing through the rotor is sufficient for cooling the rotor and the stator winding. Another advantage is that the rotor according to the invention can be used both when supplying the stator winding with alternating current and with direct current.
  • the pump according to the invention can also be used in aquariums. Due to its high performance, the pump can be used both directly in and outside of the medium.
  • Fig. 1 shows a longitudinal section through the pump and Fig. 2 is a detail 1 ansi cht, which clarifies the tube provided with drive fins and the bearing of the central axis.
  • the centrally arranged rotor 1 of the pump consists of a tube 1 'made of magnetic material, which is composed of two tube halves, one tube half forming a south pole and the other half forming a north pole.
  • drive fins 2 are provided, which are connected at one end to the inner wall of the tube 1 'and at the other end to an axle bearing 3 provided in the middle of the tube.
  • the number and the angular position 1 of the drive lamellae 2 are based on the desired characteristics for the pump.
  • the axle bearing 3 is rotatably mounted on a central axis 4, which in turn is fixed with its ends in rubber halves 5.
  • the rubber halters 5 are arranged via a receptacle with the help of webs 6 in the center of the inlet or outlet nozzle 7, 8 of the pump, which provide no significant resistance to the medium.
  • the central axis 4 is preferably made of ceramic, which ensures long-term continuous operation by self-lubrication.
  • the rubber bracket 5 allows a certain vibration damping and easy replacement of the central axis 4th
  • the above structure ensures that the tube 1 'with the drive plates 2 can rotate about the axis 4 located in the middle. By this rotation, the medium to be pumped is conveyed in a straight line from inlet connector 7 via the hollow space of tube 1 'to outlet connector 8.
  • the stator surrounding the rotor 1 consists of a tube 9 serving as a seal, the inside of which is arranged at a short distance from the outside of the rotor 1.
  • a stator winding 10 is arranged on the outer circumference of the tube 9.
  • the other side of the stator winding 10 is enclosed by a magnetic sheet core 17.
  • tubular axle bearing 3 - magnetic tube 1 '- tube 9 - stator winding 10 - magnetic sheet steel ring core 17 - housing wall 11.
  • the front housing parts 12 and 13 have the inlet and outlet connections 7 or 8, which are aligned with the tube 1 '.
  • the actual power transmission takes place without contact from the stator winding 10, which is connected via a power supply cable 16 to a power source, not shown, to the magnetic tube 1 '.
  • the conveyor system in the form of the tube 1 ' is thus in a channel hermetically sealed by the tube 9 to the stator.
  • the parts located on the outside of the tube 9 are poured into a casting compound 14 in accordance with the medium to be pumped, which increases operational reliability.
  • the medium delivered through the center of the pump simultaneously causes a uniform cooling of the stator winding 10 via the tube 9.
  • the pump described above can be designed for 12 V DC voltage as well as for 24 V, 110 V or 220 V AC voltage. r-
  • a pump output of up to 12,000 liters per hour can be achieved.
  • the characteristic values, quantity and pressure can be adapted to the requirements. Potting all cavities eliminates the risk of a short circuit, so that the pump can also be used with explosive media. Due to the simple reversal of the conveying direction described above, the pump can also be used as a flow pump.

Abstract

A pump, particularly for liquid media, with a driving motor comprising a rotor and stator, and a centrifugal system made up of driving plates (2), and inlet tube and outlet tube (7, 8). The rotor, as part of a centrifugal system, is designed in the form of a pipe (1), onto which the driving plates (2) are fixed and which is aligned with the inlet and outlet tubes (7, 8) of the pump. Said pump allows the medium to flow in a straight line, axially to the driving motor or pump, permitting efficiency. Due to its particularly quiet running, the pump can also be used in aquaria. Its high performance level enables the pump to be used directly in, as well as outside, the medium.

Description

Pu pe für flüssige Medien Pu pe for liquid media
Die Erfindung betrifft eine Pumpe der im Oberbegriff des Patentanspruches 1 beschriebenen, aus dem DE-GM 19 51 826 bekannten Art-The invention relates to a pump of the type described in the preamble of claim 1, known from DE-GM 19 51 826
Übliche Pumpen bestehen im wesentlichen aus zwei Komponenten, nämlich einem Antriebsmotor und einer an die Ausgangswelle des Motors angekoppelten Kreiseleinrichtung, die mittels Lamellen bzw. eines Kreisels die Umwälzung des flüssigen Mediums bewirkt. Hierbei erfolgt jedoch eine Drehung des Mediums um 90°. Dies hat den Nachteil, daß ein Teil der aufgewendeten Leistung schon innerhalb des Systems verl orgengeht , was demzufolge einen Druck- bzw. Schubverlust nach sich zieht. Abgesehen davon kann eine Hintereinanderschaltung von mehreren solchen Pumpen nur mit erheblichem Aufwand vorgenommen werden, da der Ausgang wesentlich kleiner dimensioniert sein muß. Hinzu kommt noch, daß für die Kühlung eigens dafür vorgesehene Kanäle eingebaut werden müssen.Conventional pumps essentially consist of two components, namely a drive motor and a gyroscope device coupled to the output shaft of the motor, which effects the circulation of the liquid medium by means of fins or a gyroscope. Here, however, the medium is rotated by 90 °. This has the disadvantage that part of the power expended is already lost within the system, which consequently results in a loss of pressure or thrust. Apart from this, several such pumps can only be connected in series with considerable effort, since the output must be dimensioned much smaller. In addition, specially designed channels must be installed for cooling.
Aus dem eingangs erwähnten DE-GM 19 51 826 ist ferner eine Pumpe bekannt, die im wesentlichen aus einem eine Statorwicklung aufweisenden Stator sowie einem darin koaxial angeordneten, rohrför igen Rotor aufweist. Der Rotor umfaßt hierbei eine Rotorwicklung und einen Kurzschlußring. Da der Rotor die Rotorwicklung aufnehmen muß, ist eine verhältnismäßigFrom the aforementioned DE-GM 19 51 826 a pump is also known which essentially comprises a stator having a stator winding and a coaxial tube-shaped rotor therein. The rotor here comprises a rotor winding and a short-circuit ring. Since the rotor has to take up the rotor winding, one is proportional
ERSATZBLÄTT dicke Rohrwandung erforderl ch. Die durch das gepumpte Medium selbst erzielbare Kühlung der Wicklungen ist so gering, daß für diese eigene Kühlmaßnahmen getroffen werden müssen.SPARE BLADE thick pipe wall required. The cooling of the windings that can be achieved by the pumped medium itself is so low that cooling measures have to be taken for these.
Es ist somit Aufgabe der Erfindung, eine Pumpe vorzuschlagen, die keine zusätzlichen Kühlmaßnahmen erfordert und einen kompakten Aufbau aufweist.It is therefore the object of the invention to propose a pump which does not require any additional cooling measures and which has a compact structure.
Die Lösung dieser Aufgabe ergibt sich anhand der kennzeichnenden Merkmale des Patentanspruches 1. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche 2 - 4.This object is achieved on the basis of the characterizing features of patent claim 1. Advantageous refinements of the invention are the subject matter of subclaims 2-4.
Da gemäß der Erfindung als Rotor ein Magnetrohr Anwendung findet, kann auf eine Rotorwickl ng und einen Kurzschlußring verzichtet werden. Außerdem sind keine separaten Kühlmaßnahmen erforderlich, da das den Rotor durchströmende Medium für die Kühlung des Rotors sowie der Statorwicklung ausreicht. Weiterhin ist von Vorteil, daß der erfindungsgemäße Rotor sowohl bei Speisung der Statorwicklung mit Wechselstrom als auch Gleichstrom Verwendung finden kann.Since a magnetic tube is used as a rotor according to the invention, a rotor winding and a short-circuit ring can be dispensed with. In addition, no separate cooling measures are required, since the medium flowing through the rotor is sufficient for cooling the rotor and the stator winding. Another advantage is that the rotor according to the invention can be used both when supplying the stator winding with alternating current and with direct current.
Messungen bei einer auf 12 VoTt Gleichspannung ausgelegten Pumpe haben ergeben, daß bei Dauerbetrieb keine nennenswerten Verbrauchswerte auftreten und sich somit ein optimaler Wirkungsgrad ergibt. Infolge der besonderen Laufruhe ist die erfindungsgemäße Pumpe auch in Aquarien einsetzbar. Aufgrund ihrer hohen Leistung kann die Pumpe sowohl direkt im Medium als auch außerhalb dessen eingesetzt werden.Measurements on a pump designed for 12 VoTt DC voltage have shown that during continuous operation there are no significant consumption values and thus there is an optimal efficiency. As a result of the particularly smooth running, the pump according to the invention can also be used in aquariums. Due to its high performance, the pump can be used both directly in and outside of the medium.
Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:The invention is explained below with reference to the drawing. Show it:
Fig. 1 einen Längsschnitt durch die Pumpe und Fig. 2 eine Detai 1 ansi cht , die das mit Antriebslamellen versehene Rohr sowie die Lagerung der Mittelachse verdeutl i cht .Fig. 1 shows a longitudinal section through the pump and Fig. 2 is a detail 1 ansi cht, which clarifies the tube provided with drive fins and the bearing of the central axis.
Wie aus den Fig. 1 und 2 ersichtlich, besteht der mittig angeordnete Rotor 1 der Pumpe aus einem aus Magnetmaterial bestehenden Rohr 1 ', das sich aus zwei Rohrhälften zusammensetzt, wobei eine Rohrhälfte einen Südpol und die andere Hälfte einen Nordpol bildet. In dem Rohr l 1 sind Antriebslamellen 2 vorgesehen, die mit einem Ende mit der Innenwand des Rohres 1 ' und mit dem anderen Ende mit einem in Rohrmitte vorgesehenen Achslager 3 verbunden sind. Die Anzahl und die Wi nkel stel 1 ung der Antriebslamellen 2 richtet sich nac den gewünschten Kenndaten für die Pumpe. Das Achslager 3 ist drehbar auf einer zentralen Achse 4 gelagert, die ihrerseits mit ihren Enden in Gummi hal terungen 5 festgelegt ist. Die Gummi hal terungen 5 sind über eine Aufnahme mit Hilfe von Stege 6 mittig im Einlaß- bzw. Auslaßstutzen 7, 8 der Pumpe angeordnet, die dem Medium keinen wesentlichen Widerstand entgegensetzen. Die zentrale Achse 4 besteht vorzugsweise aus Keramik, wodurch ein langjähriger Dauerbetrieb .durch Selbstschmierung gewährleistet wird. Die Gummi hal terung 5 ermöglicht eine gewisse Schwingungsdämpfung und ein leichtes Auswechseln der zentralen Achse 4.As can be seen from FIGS. 1 and 2, the centrally arranged rotor 1 of the pump consists of a tube 1 'made of magnetic material, which is composed of two tube halves, one tube half forming a south pole and the other half forming a north pole. In the tube l 1 drive fins 2 are provided, which are connected at one end to the inner wall of the tube 1 'and at the other end to an axle bearing 3 provided in the middle of the tube. The number and the angular position 1 of the drive lamellae 2 are based on the desired characteristics for the pump. The axle bearing 3 is rotatably mounted on a central axis 4, which in turn is fixed with its ends in rubber halves 5. The rubber halters 5 are arranged via a receptacle with the help of webs 6 in the center of the inlet or outlet nozzle 7, 8 of the pump, which provide no significant resistance to the medium. The central axis 4 is preferably made of ceramic, which ensures long-term continuous operation by self-lubrication. The rubber bracket 5 allows a certain vibration damping and easy replacement of the central axis 4th
Durch den vorstehenden Aufbau wird erreicht, daß sich das Rohr 1 ' mit den Antriebslamellen 2 um die sich in der Mitte befindliche Achse 4 drehen kann. Durch diese Drehung wird das zu pumpende Medium von Einlaßstutzen 7 über den Hohlraum des Rohres 1 ' zum Auslaßstutzen 8 geradlinig befördert.The above structure ensures that the tube 1 'with the drive plates 2 can rotate about the axis 4 located in the middle. By this rotation, the medium to be pumped is conveyed in a straight line from inlet connector 7 via the hollow space of tube 1 'to outlet connector 8.
Gleichzeitig besteht die Möglichkeit, durch Phasendrehung die Drehrichtung des Rohres 1 ' umzukehren, was eine Umkehr der Förderrichtung der Pumpe zur Folge hat. Da das Pumpengehäuse koaxial zum Rohr 1 ' angeordnete Einlaß- und Auslaßstutzen, 7,8 aufweist, steht einer Richtungsänderung nichts im Wege; d.h. der jeweilige Stutzen kann als Einlaß- oder als Auslaßstutzen dienen.At the same time, there is the possibility of reversing the direction of rotation of the tube 1 'by phase rotation, which is a reversal of Pump delivery direction results. Since the pump housing has inlet and outlet connections 7, 8 arranged coaxially with the pipe 1 ', there is nothing to prevent a change of direction; ie the respective nozzle can serve as an inlet or outlet nozzle.
Der den Rotor 1 umschließende Stator besteht aus einem als Abdichtung dienenden Rohr 9, dessen Innenseite mit einem geringen Abstand zur Außenseite des Rotors 1 angeordnet ist. Am Außenumfang des Rohres 9 ist eine Statorwicklung 10 angeordnet. Die andere Seite der Statorwicklung 10 wird von einem Magnetblechringkern 17 umschlossen. Ausgehend von der Mittelachse 4 ergibt sich in radialer Richtung betrachtet somit folgender koaxialer Aufbau: Rohrförmiges Achslager 3 - magnetisches Rohr 1' - Rohr 9 - Statorwicklung 10 - Magnetblechringkern 17 - Gehäusewand 11. Die stirnseitigen Gehäuseteile 12 und 13 weisen die Einlaß- bzw. Auslaßstutzen 7 bzw. 8 auf, die mit dem Rohr 1 ' fluchten.The stator surrounding the rotor 1 consists of a tube 9 serving as a seal, the inside of which is arranged at a short distance from the outside of the rotor 1. A stator winding 10 is arranged on the outer circumference of the tube 9. The other side of the stator winding 10 is enclosed by a magnetic sheet core 17. Starting from the central axis 4, the following coaxial structure results when viewed in the radial direction: tubular axle bearing 3 - magnetic tube 1 '- tube 9 - stator winding 10 - magnetic sheet steel ring core 17 - housing wall 11. The front housing parts 12 and 13 have the inlet and outlet connections 7 or 8, which are aligned with the tube 1 '.
Die eigentliche Kraftübertragung erfolgt kontaktlos von der Statorwicklung 10, die über ein Stromversorgungskabel 16 mit einer nicht dargestellten Stromquelle in Verbindung steht, zum magnetischen Rohr 1 '. Das Fördersystem in Form des Rohres 1 ' befindet sich somit in einem durch das Rohr 9 hermetisch zum Stator abgeschlossenen Kanal . Die an der Außenseite des Rohres 9 befindlichen Teile sind in eine Vergußmasse 14 entsprechend dem zu pumpenden Medium eingegossen, wodurch sich die Betriebssicherheit erhöht. Das durch die Mitte der Pumpe geförderte Medium bewirkt gleichzeitig über das Rohr 9 eine gleichmäßige Kühlung der Statorwicklung 10.The actual power transmission takes place without contact from the stator winding 10, which is connected via a power supply cable 16 to a power source, not shown, to the magnetic tube 1 '. The conveyor system in the form of the tube 1 'is thus in a channel hermetically sealed by the tube 9 to the stator. The parts located on the outside of the tube 9 are poured into a casting compound 14 in accordance with the medium to be pumped, which increases operational reliability. The medium delivered through the center of the pump simultaneously causes a uniform cooling of the stator winding 10 via the tube 9.
Die vorstehend beschriebene Pumpe kann auf 12 V Gleichspannung wie auch auf 24 V, 110 V oder 220 V Wechsel Spannung ausgelegt werden . r-The pump described above can be designed for 12 V DC voltage as well as for 24 V, 110 V or 220 V AC voltage. r-
Bei entsprechender elektrischer Auslegung kann eine Pumpleistung bis zu 12.000 Liter pro Stunde erzielt werden. Außerdem können durch das Zusammenschal en mehrerer Pumpen di Kennwerte, Menge und Druck, dem Bedarf angepaßt werden. Durch das Vergießen aller Hohlräume wird eine Kurzschlußgefahr ausgeschlossen, so daß die Pumpe auch bei explosiven Medien einsetzbar ist. Durch die vorstehend beschriebene einfache Umkehr der Förderrichtung kann die Pumpe auch als Strömungspumpe eingesetzt werden. With the appropriate electrical design, a pump output of up to 12,000 liters per hour can be achieved. In addition, by connecting several pumps, the characteristic values, quantity and pressure can be adapted to the requirements. Potting all cavities eliminates the risk of a short circuit, so that the pump can also be used with explosive media. Due to the simple reversal of the conveying direction described above, the pump can also be used as a flow pump.

Claims

P a t e n t a n s p r ü c h eP a t e n t a n s r u c h e
Pumpe, insbesondere für flüssige Medien, mitPump, especially for liquid media, with
- einem eine Statorwicklung (10) aufweisenden Stator sowie- A stator having a stator winding (10) and
- einem rohrförmigen Rotor (1), in dessen Innerem Antriebslamellen (2) zur Förderung des Mediums vorgesehen sind und der mit dem Einlaß- und Auslaßstutzen der Pumpe f1 uchtet, d a d u r c h g e k e n n z e i c h n e t,- A tubular rotor (1), in the interior of which drive lamellae (2) are provided for conveying the medium and which is aligned with the inlet and outlet port of the pump, that is, that means that
- daß der rohrförmige Rotor (1 ) aus diametral zweipolig ausgelegtem Magnetmaterial besteht.- That the tubular rotor (1) consists of diametrically bipolar magnetic material.
Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß der rohrförmige Rotor (1) über die Antriebslamellen (2) mittels eines rohrfömigen Achslagers (3) drehbar an einer Mittelachse (4) der Pumpe festgelegt ist.Pump according to claim 1, characterized in that the tubular rotor (1) is rotatably attached to a central axis (4) of the pump via the drive plates (2) by means of a tubular axle bearing (3).
Pumpe nach Anspruch 2, dadurch gekennzeichnet, daß die Mittelachse (4) der Pumpe aus Keramik besteht und daß deren Enden in Gummihalterungen (5) eingedrückt sind.Pump according to claim 2, characterized in that the central axis (4) of the pump consists of ceramic and that the ends thereof are pressed into rubber holders (5).
Pumpe nach Anspruch 3, dadurch gekennzeichnet, daß die zwei Gummihalterungen (5) durch Stege (6) mittig im Einlaß- bzw.Pump according to claim 3, characterized in that the two rubber holders (5) by means of webs (6) centrally in the inlet or
ERSATZBLATT Auslaßstutzen (7, 8) der Pumpe angeordnet sind REPLACEMENT LEAF Outlet nozzle (7, 8) of the pump are arranged
PCT/DE1987/000550 1986-11-28 1987-11-27 Pump for liquid media WO1988003993A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3640657.0 1986-11-28
DE19863640657 DE3640657A1 (en) 1986-11-28 1986-11-28 PUMP FOR LIQUID MEDIA

Publications (1)

Publication Number Publication Date
WO1988003993A1 true WO1988003993A1 (en) 1988-06-02

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ID=6314981

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Application Number Title Priority Date Filing Date
PCT/DE1987/000550 WO1988003993A1 (en) 1986-11-28 1987-11-27 Pump for liquid media

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WO (1) WO1988003993A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0856666A1 (en) * 1997-01-31 1998-08-05 Ebara Corporation Liquid delivery device, method of controlling such liquid delivery device, and liquid delivery pump
DE19805777A1 (en) * 1998-02-12 1999-08-26 Bosch Gmbh Robert Fuel delivery unit
WO1999060274A1 (en) * 1998-05-21 1999-11-25 Mdhan Co., Ltd. Pump utilizing an impeller with a magnet

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DE3821030A1 (en) * 1988-06-22 1989-12-28 Oplaender Wilo Werk Gmbh CANOPY PUMP
AT393456B (en) * 1989-11-15 1991-10-25 Schima Heinrich Centrifugal pump for the conveyance of blood
DE19706087C2 (en) * 1997-02-17 2000-10-05 Rene Lemoine Liquid pump
GB2369409A (en) * 2000-08-10 2002-05-29 Shamal Noori Hassan Barzanji Magnetic pump
GB2379717B (en) * 2001-09-18 2005-08-03 Sunonwealth Electr Mach Ind Co Heat-dissipating fan structure
WO2005061902A1 (en) * 2003-12-22 2005-07-07 Imp Pumps, D.O.O. Hydraulic in-line axial-flow pump with a submerged rotor of an electric motor
RU2519298C1 (en) * 2013-03-27 2014-06-10 Открытое акционерное общество "Омское машиностроительное конструкторское бюро" Sealed axial electrically driven pump unit

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FR1134967A (en) * 1955-10-20 1957-04-23 Electric motor with free rotor for electro-pump unit
DE2012560A1 (en) * 1970-03-17 1971-09-30 Sieper H Rotary pumps, in particular fuel pumps for internal combustion engines
DE2264934A1 (en) * 1972-09-14 1975-11-20 Eheim Gunther Rotor bearing for motor-pump set - has bearing socket with elastic bearing cap over shaft end
GB2042279A (en) * 1979-02-13 1980-09-17 Satchwell Controls Ltd Electric Pump

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Publication number Priority date Publication date Assignee Title
BE469755A (en) *
CH272374A (en) * 1948-06-23 1950-12-15 Spring Fritz Radial and axial acting, electric motor driven circulating pump.
FR1134967A (en) * 1955-10-20 1957-04-23 Electric motor with free rotor for electro-pump unit
DE2012560A1 (en) * 1970-03-17 1971-09-30 Sieper H Rotary pumps, in particular fuel pumps for internal combustion engines
DE2264934A1 (en) * 1972-09-14 1975-11-20 Eheim Gunther Rotor bearing for motor-pump set - has bearing socket with elastic bearing cap over shaft end
GB2042279A (en) * 1979-02-13 1980-09-17 Satchwell Controls Ltd Electric Pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0856666A1 (en) * 1997-01-31 1998-08-05 Ebara Corporation Liquid delivery device, method of controlling such liquid delivery device, and liquid delivery pump
US6092994A (en) * 1997-01-31 2000-07-25 Ebara Corporation Liquid delivery device, method of controlling such liquid delivery device, and liquid delivery pump
DE19805777A1 (en) * 1998-02-12 1999-08-26 Bosch Gmbh Robert Fuel delivery unit
WO1999060274A1 (en) * 1998-05-21 1999-11-25 Mdhan Co., Ltd. Pump utilizing an impeller with a magnet

Also Published As

Publication number Publication date
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