EP0060993A2 - Magnetic drive for a liquid pump - Google Patents
Magnetic drive for a liquid pump Download PDFInfo
- Publication number
- EP0060993A2 EP0060993A2 EP82101047A EP82101047A EP0060993A2 EP 0060993 A2 EP0060993 A2 EP 0060993A2 EP 82101047 A EP82101047 A EP 82101047A EP 82101047 A EP82101047 A EP 82101047A EP 0060993 A2 EP0060993 A2 EP 0060993A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- pump
- liquid pump
- gas turbine
- pump according
- 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
Links
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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
- F04D13/04—Units comprising pumps and their driving means the pump being fluid driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
-
- 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
- F04D13/025—Details of the can separating the pump and drive area
-
- 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
- F04D13/026—Details of the bearings
-
- 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
Definitions
- the invention relates to a liquid pump with a completely encapsulated pump housing with a non-magnetic outer wall and with a contactless magnetic rotary field drive of the at least partially magnetizable pump rotor by means of an externally driven magnetized rotor, in particular as a gas turbine auxiliary machine.
- DE-PS 20 58 062 is known, in which a contact-free mounting of the rotor is brought about by the interaction between magnetic and hydrodynamic forces. This results in a special spherical design of the pump wheel or a separation of the pump wheel and drive rotor. In order to generate the hydrodynamic bearing film, complex structural measures are required.
- the present invention has for its object to simplify the drive known per se to the utmost by a magnetic rotating field for use in a liquid pump.
- the solution according to the invention consists in that the rotor with an inner cylindrical recess coaxially surrounds the pump housing and is permanently magnetized on its cylindrical surface and that the pump rotor with blading is in one piece and has a cylindrical outer surface and is supported in a warehouse.
- the simple basic shapes of the driving rotor, the housing and the pump rotor and the simple bearing essentially serving for axial support make it possible to produce a completely encapsulated liquid pump at a reasonable cost, which is suitable for an extremely wide speed range.
- Their main advantage is the extremely small installation dimensions, which make them suitable for installation in the hub of a gas turbine rotor.
- a pump rotor made of ferromagnetic metal is driven by simple permanent magnets embedded in the cylindrical surface of the rotor. It is also expedient if the pump rotor and / or the rotor is permanently magnetized in a sectoral, in particular mutually corresponding distribution in the base material. Radial grooves can be provided in a favorable manner between the sectors of different polarity.
- a suitable material for the pump rotor is cobalt samarium, which can be processed as a sintered material.
- the axial support and simultaneous centering of the pump rotor which is preferably designed with radial blading or simple radial channels, can preferably be provided by a centrally arranged ball.
- the spherical surface can, if necessary, be provided with etched spiral grooves.
- the pump housing which must be made particularly thin-walled to keep the air gap small, is preferably made of silicon nitrite ceramic.
- the liquid pump according to the invention is e.g. Particularly suitable as a fuel pump for light and inexpensive gas turbine engines with a short service life, such as those e.g. be used for single missiles.
- the preferred arrangement is that the pump housing is suspended in the nose of the air inlet on several struts, the latter at the same time serving as parts of a guide vane and containing the suction and delivery line for the pump in inner channels.
- the drawing shows a section through the front end of a gas turbine rotor with a pump design according to the invention.
- a built gas turbine rotor 1 with a first compressor blading 2 is shown.
- Struts 4 and 5 are attached to the gas turbine housing 3 and have a streamlined nose 6 in the inlet of the gas turbine, to which the pump housing 8 is fastened by means of a screw connection 7. Sealing is done with a sealing ring-9.
- the strut 5 shown below contains an intake line 10, which opens into a central channel 11 in the nose 6, which merges into the axial inlet of the pump rotor 13.
- the pump rotor 13 is provided with an essentially radial blading 14 which, however, has an axial outlet which is connected to a coaxial annular space 15 in the nose 6.
- This annular space in turn hangs together with a delivery line 16 in the strut 4 shown above and merges into a channel 17 on the outside of the gas turbine housing 3.
- the Pump rotor 13 is supported by a central ball 13 on a bearing body 19 in the pump housing 8.
- the sealing between the suction and pressure side and the axial fixation of the pump rotor 13 is carried out by a sealing ring 20 on which a slide ring 21 is resiliently supported.
- the outside of the thin-walled cylindrical pump housing 8 forms a narrow air gap 12 with an inner cylinder surface 22 in the gas turbine rotor 1, permanent magnets 23 being let into the cylinder surface 22 of the gas turbine rotor 1 in the overlap region.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Flüssigkeitspumpe mit vollständig gekapseltem Pumpengehäuse mit unmagnetischer Außenwand und mit berührungslosem magnetischem Drehfeldantrieb des zumindest teilweise magnetisierbaren Pumpenläufers durch einen fremdgetriebenen magnetisierten Rotor, insbesondere als Gasturbinenhilfsmaschine.The invention relates to a liquid pump with a completely encapsulated pump housing with a non-magnetic outer wall and with a contactless magnetic rotary field drive of the at least partially magnetizable pump rotor by means of an externally driven magnetized rotor, in particular as a gas turbine auxiliary machine.
Es ist die DE-PS 20 58 062 bekannt, bei der eine berührungsfreie Lagerung'des Rotors durch die Wechselwirkung zwischen magnetischen und hydrodynamischen Kräften zustande kommt. Hierdurch ist eine besondere sphärische Gestaltung des Pumpenrades bzw. eine Trennung von Pumpenrad und Antriebsläufer bedingt. Insbesondere zur Erzeugung des hydrodynamischen Lagerfilms sind aufwendige bauliche Maßnahmen erforderlich.DE-PS 20 58 062 is known, in which a contact-free mounting of the rotor is brought about by the interaction between magnetic and hydrodynamic forces. This results in a special spherical design of the pump wheel or a separation of the pump wheel and drive rotor. In order to generate the hydrodynamic bearing film, complex structural measures are required.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, den an sich bekannten Antrieb durch ein magnetisches Drehfeld für die Anwendung in einer Flüssigkeitspumpe aufs äußerste zu vereinfachen. Die erfindungsgemäße Lösung besteht darin, daß der Rotor mit einer innenzylindrischen Ausnehmung das Pumpengehäuse koaxial umgibt und an seiner Zylinderfläche dauermagnetisch pdarisiert ist und daß der Pumpenläufer mit Beschaufelung einstückig ist, eine zylindrische Außenfläche aufweist und in einem Lager abgestützt ist. Die einfachen Grundformen des antreibenden Rotors, des Gehäuses und des Pumpenläufers und die einfache, im wesentlichen der axialen Abstützung dienende Lagerung ermöglichen es, eine vollständig gekapselte Flüssigkeitspumpe zu vertretbarem Aufwand herzustellen, die für einen äußerst weiten Drehzahlbereich geeignet ist. Ihr wesentlicher Vorteil liegt darüberhinaus in den äußerst geringen Einbaumaßen, die sie für den Einbau in der Nabe eines Gasturbinenrotors geeignet machen. In einfachster Ausführung wird ein aus ferromagnetischem Metall bestehender Pumpenläufer durch einfache,-in der Zylinderfläche des Rotors eingelassene Dauermagneten angetrieben. Günstig ist es auch, wenn der Pumpenläufer und/oder der Rotor in sektorieller, insbesondere einander entsprechender Verteilung im Grundmaterial dauermagnetisiert ist..Zwischen den Sektoren unterschiedlicher Polarität können dabei in günstiger Weise radiale Nuten angebracht werden. Ein geeigneter Werkstoff für den Pumpenläufer ist Kobaltsamarium, das als Sintermaterial verarbeitet werden kann. Die axiale Abstützung und gleichzeitige Zentrierung des Pumpenläufers, der bevorzugt mit radialer Beschaufelung oder einfachen radialen Kanälen ausgebildet ist, kann bevorzugt durch eine zentrisch angeordnete Kugel erfolgen. Zur Erhöhung der Tragfähigkeit des Kugelkalottenlagers kann erforderlichenfalls die Kugeloberfläche mit eingeäzten Spiralrillen versehen sein. Das Pumpengehäuse, das zur Kleinhaltung des Luftspaltes besonders dünnwandig ausgeführt werden muß, besteht vorzugsweise aus Slizium-Nitrit-Keramik.The present invention has for its object to simplify the drive known per se to the utmost by a magnetic rotating field for use in a liquid pump. The solution according to the invention consists in that the rotor with an inner cylindrical recess coaxially surrounds the pump housing and is permanently magnetized on its cylindrical surface and that the pump rotor with blading is in one piece and has a cylindrical outer surface and is supported in a warehouse. The simple basic shapes of the driving rotor, the housing and the pump rotor and the simple bearing essentially serving for axial support make it possible to produce a completely encapsulated liquid pump at a reasonable cost, which is suitable for an extremely wide speed range. Their main advantage is the extremely small installation dimensions, which make them suitable for installation in the hub of a gas turbine rotor. In the simplest version, a pump rotor made of ferromagnetic metal is driven by simple permanent magnets embedded in the cylindrical surface of the rotor. It is also expedient if the pump rotor and / or the rotor is permanently magnetized in a sectoral, in particular mutually corresponding distribution in the base material. Radial grooves can be provided in a favorable manner between the sectors of different polarity. A suitable material for the pump rotor is cobalt samarium, which can be processed as a sintered material. The axial support and simultaneous centering of the pump rotor, which is preferably designed with radial blading or simple radial channels, can preferably be provided by a centrally arranged ball. To increase the load-bearing capacity of the spherical cap bearing, the spherical surface can, if necessary, be provided with etched spiral grooves. The pump housing, which must be made particularly thin-walled to keep the air gap small, is preferably made of silicon nitrite ceramic.
Wie bereits erwähnt, ist die erfindungsgemäße Flüssigkeitspumpe z.B. als Brennstoffpumpe besonders für leicht und kostengünstig hergestellte Gasturbinentriebwerke kurzer Lebensdauer geeignet, wie sie z.B. für Einfachflugkörper benutzt werden. In der Ausgestaltung als Gasturbinenbrennstoffpumpe besteht die bevorzugte Anordnung darin, daß das Pumpengehäuse in der Nase des Lufteintritts an mehreren Streben aufgehängt ist, wobei letztere zugleich als Teile eines Vorleitrades dienen können und in inneren Kanälen die Ansaug- und Förderleitung für die Pumpe enthalten.As already mentioned, the liquid pump according to the invention is e.g. Particularly suitable as a fuel pump for light and inexpensive gas turbine engines with a short service life, such as those e.g. be used for single missiles. In the configuration as a gas turbine fuel pump, the preferred arrangement is that the pump housing is suspended in the nose of the air inlet on several struts, the latter at the same time serving as parts of a guide vane and containing the suction and delivery line for the pump in inner channels.
Die Zeichnung zeigt einen Schnitt durch das vordere Ende eines Gasturbinenrotors mit einer erfindungsgemäßen Pumpenausführung.The drawing shows a section through the front end of a gas turbine rotor with a pump design according to the invention.
Es ist ein gebauter Gasturbinenläufer 1 mit einer ersten Verdichterbeschaufelung 2 gezeigt. Am Gasturbinengehäuse 3 sind Streben 4 und 5 angebracht, die eine strömungsgünstige Nase 6 im Einlauf der Gasturbine tragen, an der über eine Verschraubung 7 das Pumpengehäuse 8 befestigt ist. Eine Abdichtung erfolgt durch einen Dichtring-9. Die unten dargestellte Strebe 5 enthält eine Ansaugleitung 10, die in einen zentralen Kanal 11 in der Nase 6 mündet, der in den axialen Eintritt des Pumpenläufers 13 übergeht. Der Pumpenläufer 13 ist mit einer im wesentlichen radialen Beschaufelung 14 versehen, die jedoch einen axialen Austritt hat, der mit einem koaxialen Ringraum 15 in der Nase 6 verbunden ist. Dieser Ringraum hängt wiederum zusammen mit einer Förderleitung 16 in der oben dargestellten Strebe 4 und geht in einen Kanal 17 an der Außenseite des Gasturbinengehäuses 3 über. Der Pumpenläufer 13 stützt sich über eine zentrische Kugel 13 an einem Lagerkörper 19 im Pumpengehäuse 8 ab. Auf der Gegenseite zum Lager 13, 19 erfolgt die Abdichtung zwischen Saug- und Druckseite und die axiale Fixierung des Pumpenläufers 13 durch einen Dichtring 20,auf dem sich ein Gleitring 21 federnd-abstützt. Das an der Außenseite dünnwandige zylindrische Pumpengehäuse 8 bildet mit einer inneren Zylinderfläche 22 im Gasturbinenläufer 1 einen engen Luftspalt 12, wobei im Überdeckungsbereich Dauermagnete 23 in die Zylinderfläche 22 des Gasturbinenläufers 1 eingelassen sind.A built gas turbine rotor 1 with a
Claims (9)
dadurch gekennzeichnet, daß der Rotor (1) mit einer innenzylindrischen.Ausnehmung das Pumpengehäuse (8) koaxial umgibt und an seiner Zylinderfläche (22) dauermagnetisch polarisiert ist,und daß der Pumpenläufer (13) mit Beschaufelung (14) einstückig ist, eine zylindrische Außenfläche (24) aufweist und in einem Lager (18, 19) abgestützt ist.1. liquid pump with completely encapsulated pump housing, with non-magnetic outer wall and with contactless magnetic rotary field drive of the at least partially magnetizable pump rotor by means of an externally driven magnetizable rotor, in particular as a gas turbine auxiliary unit,
characterized in that the rotor (1) coaxially surrounds the pump housing (8) with an inner cylindrical recess and is permanently magnetically polarized on its cylindrical surface (22), and in that the pump rotor (13) with blading (14) is in one piece, a cylindrical outer surface (24) and is supported in a bearing (18, 19).
dadurch gekennzeichnet, daß der Pumpenläufer (13) und/ oder der Rotor (1) in sektorieller Verteilung dauermagnetisiert ist.3. Liquid pump according to one of claims 1 or 2,
characterized in that the pump rotor (13) and / or the rotor (1) is permanently magnetized in a sectoral distribution.
dadurch gekennzeichnet, daß der Pumpenläufer (13) und/ oder der Rotor (1) zur Verstärkung der sektoriellen Magnetisierung radiale Nuten zwischen den Sektoren unterschiedlicher Polarität aufweist.4. Liquid pump according to one of claims 1 to 3,
characterized in that the pump rotor (13) and / or the rotor (1) for strengthening the sectorial Magnetization has radial grooves between the sectors of different polarity.
dadurch gekennzeichnet, daß der Pumpenläufer (13) aus Kobaltsamarium, insbesondere als Sinterwerkstoff, besteht.5. Liquid pump according to one of claims 1 to 4,
characterized in that the pump rotor (13) consists of cobalt samarium, in particular as a sintered material.
dadurch gekennzeichnet, daß die Pumpe senkrecht zur Achse gelegene Dicht- und Gleitflächen (20, 21) zwischen Saugseite und Druckseite und ein zentrierendes Lager (18, 19) zur Abstützung auf der Gegenseite aufweist.6. Liquid pump according to one of claims 1 to 5, with a substantially radial flow through the pump rotor (14-),
characterized in that the pump has sealing and sliding surfaces (20, 21) perpendicular to the axis between the suction side and the pressure side and a centering bearing (18, 19) for support on the opposite side.
1 bis 6,
dadurch gekennzeichnet, daß das Pumpengehäuse (8) aus Siliziumnitritkeramik besteht.7. Liquid pump according to one of the claims
1 to 6,
characterized in that the pump housing (8) consists of silicon nitride ceramic.
dadurch gekennzeichnet, daß das Pumpengehäuse (8) koaxial feststehend im Nabenbereich der Gasturbine angeordnet ist und daß der antreibende Rotor (1) mit einem beschaufelten Gasturbinenläufer verbunden ist.8. Liquid pump according to one of claims 1 to 7, as a gas turbine auxiliary unit,
characterized in that the pump housing (8) is arranged coaxially fixed in the hub region of the gas turbine and in that the driving rotor (1) is connected to a bladed gas turbine rotor.
dadurch gekennzeichnet, daß das Pumpengehäuse (8) an mehreren mit strömungsgünstigem Profil versehenen, insbesondere in ihrer Gesamtheit als Vorleitrad ausgebil - deten Streben (4, 5) am Gasturbinengehäuse (3) befestigt ist, von denen zumindest einzelne Ansaug- (10) und Föderleitungen (16) enthalten.9. Liquid pump according to claim 8,
characterized in that the pump housing (8) on several with aerodynamic profile ins particularly struts (4, 5), which are designed as a guide vane in their entirety, are fastened to the gas turbine housing (3), at least of which contain individual suction (10) and delivery lines (16).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3111212 | 1981-03-21 | ||
DE19813111212 DE3111212A1 (en) | 1981-03-21 | 1981-03-21 | LIQUID PUMP |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0060993A2 true EP0060993A2 (en) | 1982-09-29 |
EP0060993A3 EP0060993A3 (en) | 1983-04-27 |
EP0060993B1 EP0060993B1 (en) | 1985-10-09 |
Family
ID=6127977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82101047A Expired EP0060993B1 (en) | 1981-03-21 | 1982-02-12 | Magnetic drive for a liquid pump |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0060993B1 (en) |
DE (2) | DE3111212A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2671143A1 (en) * | 1990-12-31 | 1992-07-03 | Europ Propulsion | TURBOPUMP WITH INTEGRATED FUEL IN AXIAL FLOW. |
US5224817A (en) * | 1990-12-31 | 1993-07-06 | Societe Europeenne De Propulsion | Shunt flow turbopump with integrated boosting |
US5232333A (en) * | 1990-12-31 | 1993-08-03 | Societe Europeenne De Propulsion | Single flow turbopump with integrated boosting |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112009000856B4 (en) * | 2008-04-11 | 2020-10-22 | Hanon Systems | Rotor arrangement, electric motor and method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1051123B (en) * | 1955-11-09 | 1959-02-19 | Paul Bungartz | Centrifugal pump or centrifugal compressor without shaft opening |
FR1339539A (en) * | 1962-05-30 | 1963-10-11 | Renault | Water pump drive for hydraulically cooled engines |
DE2058062A1 (en) * | 1969-12-16 | 1971-06-24 | Standard Magnet Ag | Contactless mounted, circumferential pole rings |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3373927A (en) * | 1966-06-01 | 1968-03-19 | Carrier Corp | Fluid compressor |
AT307370B (en) * | 1969-01-08 | 1973-05-25 | Laing Nikolaus | Device for transmitting the torque of a turbine to a pump |
FR2082745A5 (en) * | 1970-05-25 | 1971-12-10 | Comp Generale Electricite |
-
1981
- 1981-03-21 DE DE19813111212 patent/DE3111212A1/en not_active Withdrawn
-
1982
- 1982-02-12 EP EP82101047A patent/EP0060993B1/en not_active Expired
- 1982-02-12 DE DE8282101047T patent/DE3266733D1/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1051123B (en) * | 1955-11-09 | 1959-02-19 | Paul Bungartz | Centrifugal pump or centrifugal compressor without shaft opening |
FR1339539A (en) * | 1962-05-30 | 1963-10-11 | Renault | Water pump drive for hydraulically cooled engines |
DE2058062A1 (en) * | 1969-12-16 | 1971-06-24 | Standard Magnet Ag | Contactless mounted, circumferential pole rings |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2671143A1 (en) * | 1990-12-31 | 1992-07-03 | Europ Propulsion | TURBOPUMP WITH INTEGRATED FUEL IN AXIAL FLOW. |
EP0494008A1 (en) * | 1990-12-31 | 1992-07-08 | Societe Europeenne De Propulsion | Turbopump with axial throughflow booster |
US5197851A (en) * | 1990-12-31 | 1993-03-30 | Societe Europeenne De Propulsion | Axial flow turbopump with integrated boosting |
US5224817A (en) * | 1990-12-31 | 1993-07-06 | Societe Europeenne De Propulsion | Shunt flow turbopump with integrated boosting |
US5232333A (en) * | 1990-12-31 | 1993-08-03 | Societe Europeenne De Propulsion | Single flow turbopump with integrated boosting |
Also Published As
Publication number | Publication date |
---|---|
DE3111212A1 (en) | 1982-09-30 |
DE3266733D1 (en) | 1985-11-14 |
EP0060993A3 (en) | 1983-04-27 |
EP0060993B1 (en) | 1985-10-09 |
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