DE3032938A1 - PERMANENT MAGNETIC RADIAL BEARING - Google Patents

PERMANENT MAGNETIC RADIAL BEARING

Info

Publication number
DE3032938A1
DE3032938A1 DE19803032938 DE3032938A DE3032938A1 DE 3032938 A1 DE3032938 A1 DE 3032938A1 DE 19803032938 DE19803032938 DE 19803032938 DE 3032938 A DE3032938 A DE 3032938A DE 3032938 A1 DE3032938 A1 DE 3032938A1
Authority
DE
Germany
Prior art keywords
radial bearing
outer ring
inner ring
rings
magnetization
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.)
Ceased
Application number
DE19803032938
Other languages
German (de)
Inventor
Klaus-Dieter Dr.-Ing. Hübner
Hardo Dipl.-Ing. 3300 Braunschweig May
Gert Dr.-Ing. 4670 Cappenberg Sobottka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thyssen Stahl AG
Original Assignee
Thyssen Edelstahlwerke AG
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 Thyssen Edelstahlwerke AG filed Critical Thyssen Edelstahlwerke AG
Priority to DE19803032938 priority Critical patent/DE3032938A1/en
Priority to FR8116544A priority patent/FR2489449A1/en
Priority to JP13714081A priority patent/JPS57116933A/en
Publication of DE3032938A1 publication Critical patent/DE3032938A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/0408—Passive magnetic bearings
    • F16C32/0423—Passive magnetic bearings with permanent magnets on both parts repelling each other
    • F16C32/0425—Passive magnetic bearings with permanent magnets on both parts repelling each other for radial load mainly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/12—Suspending rotary bowls ; Bearings; Packings for bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/44—Centrifugal pumps
    • F16C2360/45—Turbo-molecular pumps

Description

Dauermagnetisches RadiallagerPermanent magnetic radial bearing

Die Erfindung betrifft ein dauermagnetisches Radiallager aus zwei koaxial ineinander angeordneten, durch gleichsinnige Magnetisierung einander in radialer Richtung abstoßenden Dauermagnetringen, die relativ zueinander drehbar angeordnet und in der Vorzugslage der Magnetisierung gleichsinnig axial magnetisiert sind.The invention relates to a permanent magnetic radial bearing consisting of two coaxially arranged one inside the other, by magnetization in the same direction permanent magnet rings repelling each other in the radial direction, which are arranged rotatably relative to each other and in the preferred position of the Magnetization are axially magnetized in the same direction.

Dauermagnetische Radiallager sind z.B. für hochtourig laufende Separatoren für die Urananreicherung bekannt. Die Separatoren werden an ihrem oberen Ende durch die Radiallager gelagert. Diese Radiallager wurden bisher aus isotropen AlNiCo-Magneten hergestellt, die aus radial magnetisierten übereinander angeordneten Dauermagnetringen bestehen. Da die Radialsteifigkeit bei dieser Ausführung in sehr starkem Maß beeinfluß wird durch die axiale Auslenkung, konnten nur verhältnismäßig kurze Separatoren gelagert werden. Bei hohen Umdrehungsgeschwindigkeiten tritt nämlich im Rohr eine Verkürzung durch radiale Aufbauchung auf. Diese axiale Verschiebung mußte aufgrund der Empfindlichkeit dieser bekannten Ausführung durch aufwendige mechanische Hilfsmittel abgefangen werden.Permanent magnetic radial bearings are known, for example, for high-speed separators for uranium enrichment. The separators are supported at its upper end by the radial bearings. These radial bearings were previously made from isotropic AlNiCo magnets, which made of radially magnetized permanent magnet rings arranged one above the other exist. Since the radial stiffness in this version is in is influenced to a very large extent by the axial deflection only relatively short separators are stored. This is because a shortening occurs in the pipe at high rotational speeds by a radial bulge. This axial displacement had to be complicated due to the sensitivity of this known design mechanical aids are intercepted.

4 -4 -

Aufgabe der vorliegenden Erfindung ist nun die Verbesserung eines dauermagnetischen Radiallagers in Richtung auf eine optimale Volumenausnutzung des Dauermagnetmaterials.The object of the present invention is now to improve a permanent magnetic radial bearing in the direction of an optimal volume utilization of the permanent magnet material.

Zur Lösung dieser Aufgabe wird erfindungsgemäß ein dauermagnetisches Radiallager mit den in den Ansprüchen gekennzeichneten Merkmalen vorgeschlagen.According to the invention, a permanent magnet is used to achieve this object Radial bearing proposed with the features characterized in the claims.

Durch die erfindungsgemäß vorgeschlagene Unterteilung des äußeren und de s inneren Magnetrings in mehrere dauermagnetische Einzelringe mit alternierender Magnetisierungsrichtung in Axialer Streckung läßt sich eine optimale Volumenausnutzung des Dauermagnetmaterials erreichen. Dabei können die Einzelringe in magnetisch homogener und spannungsfreier Ausführung hergestellt werden. Durch hohe magnetische Homogenität der Ringe läßt sich die magnetische Exzentrität und damit die Unwuchten des Lagers gering halten.Due to the subdivision proposed according to the invention of the outer and the inner magnetic ring into several permanent magnetic individual rings with an alternating direction of magnetization in axial extension, optimal volume utilization of the permanent magnet material can be achieved reach. The individual rings can be produced in a magnetically homogeneous and stress-free design. By high Magnetic homogeneity of the rings, the magnetic eccentricity and thus the imbalances of the bearing can be kept low.

Durch unterschiedliche Axiallängen wird die Unempfindlichkeit der Radialste if igke it bei axialen Auslenkungen erreicht.The insensitivity of the radial rigidity in the case of axial deflections is achieved through different axial lengths.

Die Radialsteifigkeit läßt sich nur bis zu einem gewissen Grad durch axiale Verlängerung der Dauermagnetringe vergrößern. Bei der erfindungsgemäß vorgeschlagenen Unterteilung der Dauermagnetringe in alternierend magnetisierte Einzelringe kann dagegen mit der Anzahl der Ringe die radiale Steifigkeit proportional gesteigert werden.The radial stiffness can only be passed through to a certain extent increase the axial extension of the permanent magnet rings. In the case of the subdivision of the permanent magnet rings proposed according to the invention in alternating magnetized individual rings, on the other hand, the radial rigidity can be increased proportionally with the number of rings.

Gegenüber bekannten radial magnetisierten Lagerringen zeichnet sich das erfindungsgemäße Radiallager mit alternierend in axialer Richtung magnetisierten Einzelringen zu dem durch höhere Energiedichte aus.Compared to known radially magnetized bearing rings the radial bearing according to the invention with individual rings magnetized alternately in the axial direction to the higher energy density.

"ftfl O fc A O φ Λ «Ο * O * * \J \J \J JL. \*J \-J W"ftfl O fc AO φ Λ« Ο * O * * \ J \ J \ J JL. \ * J \ -J W

In der Zeichnung sind drei Ausführungsbeispiele des erfindungsgemäßen dauermagnetischen Radiallagers dargestellt. Innenring 1 und Außenring 2 bestehen aus Einzelringen, die in axialer Richtung mit alternierender Axialmagnetisierung aneinandergereiht sind, wobei jeweils die einander in radialer Richtung gegenüberstehenden Einzelringe des Innenrings 1 und des Außenrings 2 gleichsinnig magnetisiert sind. Der Innenring 1 kann an einem Gehäuse 4 und der Außenring 2 an dem drehenden Teil 5 einer Turbomolekularpumpe befestigt sein. Bis auf die einander zugewandten Flächen sind der Innenring 1 und der Außenring 2 von nichtmagnetisierbarem Material 6·umgeben.In the drawing are three embodiments of the invention permanent magnetic radial bearing shown. Inner ring 1 and outer ring 2 consist of individual rings, which in the axial direction with alternating axial magnetization are strung together, the individual rings opposing each other in the radial direction of the inner ring 1 and the outer ring 2 are magnetized in the same direction. The inner ring 1 can be attached to a housing 4 and the outer ring 2 be attached to the rotating part 5 of a turbo molecular pump. Except for the mutually facing surfaces, the inner ring 1 and the outer ring 2 is surrounded by non-magnetizable material 6 ·.

Bei der Ausführung gemäß Fig. 2 sind zwischen den Einzelringen des Außenrings 2 Zwischenringe 3 aus nichtmagnetisierbarem Material angeordnet. Hierdurch kann eine Vergrößerung der Baulänge des Außenrings 2 zur Erhöhung der Radialsteifigkeit erreicht werden, ohne daß hierzu mehr Dauermagnetmaterial eingesetzt werden muß, wodurch sich die Volumenausnutzung des Dauermagnetmaterials erhöht,In the embodiment according to FIG. 2, intermediate rings 3 made of non-magnetizable material are between the individual rings of the outer ring arranged. This can increase the overall length of the outer ring 2 to increase the radial rigidity, without the need to use more permanent magnet material for this purpose, whereby the volume utilization of the permanent magnet material is increased elevated,

Fig. 3 zeigt als weiteres Ausführungsbeispiel den Einsatz von Zwischenringen 3 sowohl am Innenring 1 als auch am Außenring 2 mit dem zuvor im Zusammenhang mit der Erläuterung des Ausführungsbeispiels gemäß Fig. 2 erwähnten Vorteil einer besseren Volumenausnutzung des Magnetmaterials.3 shows the use of intermediate rings as a further exemplary embodiment 3 both on the inner ring 1 and on the outer ring 2 with that previously in connection with the explanation of the exemplary embodiment according to FIG. 2 mentioned advantage of a better volume utilization of the magnetic material.

Claims (5)

m-«m- « Thyssen Edelstahlwerke
AktiengesellschaftThyssen Edelstahlwerke
Corporation AnsprücheExpectations "1. Dauermagnetisches Radiallager aus mindestens zwei koaxial ineinander angeordneten, durch gleichsinnige Magnetisierung einander in radialer Richtung abstoßenden Dauermagnetringen, die relativ zueinander drehbar angeordnet und in der Vorzugslage der Magnetisierung gleichsinnig axial magnetisiert sind^"1. Permanent magnetic radial bearing made of at least two coaxially one inside the other arranged by magnetization in the same direction to each other permanent magnet rings repelling in the radial direction, which are arranged so as to be rotatable relative to one another and in the preferred position of magnetization are axially magnetized in the same direction ^ dadurch gekennzeichnet, daß dercharacterized in that the Innenring (1) und der Außenring (2) jeweils aus mindestens zwei in axialer Richtung mit alternierender Axial-Magnetisierungsrichtung aneinandergesetzten Einzelringen bestehen, wobei die Magnetisierungsrichtungen der sich jeweils gegenüberliegenden Einzelringe des Innenrings (1) und den Außenrings (2) gleichsinnig sind.Inner ring (1) and outer ring (2) each consist of at least two in axial direction with alternating axial magnetization direction juxtaposed individual rings exist, with the directions of magnetization the opposing individual rings of the inner ring (1) and the outer ring (2) are in the same direction. 2. Radiallager nach Anspruch 1, dadurch gekennzeichnet, daß das Axiallängenverhältnis des Außenrings (2) zum Innenring (1) kleiner als 1 ist.2. Radial bearing according to claim 1, characterized in that the The axial length ratio of the outer ring (2) to the inner ring (1) is less than 1. 3. Radiallager nach Anspruch 2, dadurch gekennzeichnet., daß das Axiallängenverhältnis des äußeren Rings (2) zum Innenring (1) etwa wie 1 : 2 ist.3. Radial bearing according to claim 2, characterized in that the axial length ratio of the outer ring (2) to the inner ring (1) is approximately 1: 2. 4. Radiallager nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zwischen den Einzelringen Zwischenringe (3) aus nichtmagnetisierbarem Material angeordnet sind.4. Radial bearing according to one of claims 1 to 3, characterized in that that intermediate rings (3) made of non-magnetizable material are arranged between the individual rings. 5. Radiallager nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der äußere Ring (1) an einem drehenden Teil einer Turbomolekularpumpe befestigt ist und der Innenring (l) ortsfest an einem Gehäuse (4).5. Radial bearing according to one of claims 1 to 4, characterized in that that the outer ring (1) is attached to a rotating part of a turbo molecular pump and the inner ring (l) is stationary on a housing (4).
DE19803032938 1980-09-02 1980-09-02 PERMANENT MAGNETIC RADIAL BEARING Ceased DE3032938A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19803032938 DE3032938A1 (en) 1980-09-02 1980-09-02 PERMANENT MAGNETIC RADIAL BEARING
FR8116544A FR2489449A1 (en) 1980-09-02 1981-08-31 Permanent magnet shaft bearing - has separate magnet rings with non-magnetic spacer collars in concentric races
JP13714081A JPS57116933A (en) 1980-09-02 1981-09-02 Permanent magnet type radial bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803032938 DE3032938A1 (en) 1980-09-02 1980-09-02 PERMANENT MAGNETIC RADIAL BEARING

Publications (1)

Publication Number Publication Date
DE3032938A1 true DE3032938A1 (en) 1982-04-15

Family

ID=6110889

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803032938 Ceased DE3032938A1 (en) 1980-09-02 1980-09-02 PERMANENT MAGNETIC RADIAL BEARING

Country Status (3)

Country Link
JP (1) JPS57116933A (en)
DE (1) DE3032938A1 (en)
FR (1) FR2489449A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101619746B (en) * 2008-07-02 2012-09-12 刘新广 Nonequilibrium magnetic sliding bearing
WO2012153109A3 (en) * 2011-05-06 2013-01-03 Edwards Limited Array of permanent magnets for the rotor of a magnetic bearing and method of assembly of the array
DE102012009635A1 (en) * 2012-05-14 2013-11-14 Herbert Weh Magnet arrangement for contactless support of fixed or movable objects or vehicles, has interacting magnet partners, which are used for multiplication of capacity expansion of magnet arrangement in lateral direction

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165592B (en) * 1984-10-04 1988-06-22 Sperry Sun Inc Devices for imparting rotary motion
DE3744143A1 (en) * 1987-12-24 1989-07-13 Kernforschungsanlage Juelich MAGNETIC STORAGE OF A ROTOR ON A STATOR
JPH0296017U (en) * 1989-01-20 1990-07-31
JPH04244622A (en) * 1991-01-29 1992-09-01 Ebara Corp Magnetic bearing device for horizontal rotary machine
US5521448A (en) * 1994-08-01 1996-05-28 Mechanical Technology Incorporated Damping for passive magnetic bearings
FR2732734B1 (en) * 1995-04-07 1997-06-27 Aerospatiale MINIATURE MAGNETIC BEARING HAS AT LEAST ONE ACTIVE AXIS
US6132110A (en) * 1997-04-01 2000-10-17 Olympus Optical Co., Ltd. Pivotally mounted lens cover for a moveable lens barrel capable of being separated from the lens barrel upon the occurrence of an external force to protect the coupling mechanism from breakage
AUPR975101A0 (en) * 2001-12-24 2002-01-24 Bosa Manufacturing Pty Limited Bearing system
CN104006079B (en) * 2014-05-07 2016-04-20 西安理工大学 The Halbach taper Permanent-magnet bearing that triangular-section permanent-magnetic clamp is formed
CN105443431B (en) * 2014-08-22 2019-05-03 奇鋐科技股份有限公司 Bearing arrangement and its fan
US20160102672A1 (en) * 2014-10-09 2016-04-14 Asia Vital Components Co., Ltd. Bearing structure and fan thereof
EP3196471B1 (en) * 2016-01-19 2023-08-23 Pfeiffer Vacuum Gmbh Vacuum pump
EP3607216B1 (en) 2017-04-01 2022-10-26 Carrier Corporation Magnetic radial bearing with flux boost
WO2018182891A1 (en) 2017-04-01 2018-10-04 Carrier Corporation Magnetic radial bearing with flux boost
EP3607218B1 (en) 2017-04-01 2021-10-20 Carrier Corporation Magnetic radial bearing with flux boost
CA3127836A1 (en) * 2019-01-18 2020-07-23 Telesystem Energy Ltd. Passive magnetic bearing for rotating machineries and rotating machineries integrating said bearing, including energy production turbines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704231A (en) * 1948-04-02 1955-03-15 Goldsmith Ernest Emil Magnetic bearings
FR1286271A (en) * 1960-04-12 1962-03-02 Philips Nv Magnetic bearing comprising two groups of magnetic discs or rings which repel each other
DE1291575B (en) * 1966-10-26 1969-03-27 Heliowatt Werke Elek Zitaets G Magnetic suspension of vertical waves of instruments or apparatus, especially electricity counters
US3958842A (en) * 1975-02-03 1976-05-25 Hughes Aircraft Company Radial magnetic bearing
DE2818255A1 (en) * 1978-04-26 1979-11-08 Teldix Gmbh MAGNETIC STORAGE ARRANGEMENT

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101619746B (en) * 2008-07-02 2012-09-12 刘新广 Nonequilibrium magnetic sliding bearing
WO2012153109A3 (en) * 2011-05-06 2013-01-03 Edwards Limited Array of permanent magnets for the rotor of a magnetic bearing and method of assembly of the array
US9464667B2 (en) 2011-05-06 2016-10-11 Edwards Limited Magnetic bearing assembly formed by measuring first and second order transverse stray magnetic fields
DE102012009635A1 (en) * 2012-05-14 2013-11-14 Herbert Weh Magnet arrangement for contactless support of fixed or movable objects or vehicles, has interacting magnet partners, which are used for multiplication of capacity expansion of magnet arrangement in lateral direction

Also Published As

Publication number Publication date
FR2489449A1 (en) 1982-03-05
JPS57116933A (en) 1982-07-21

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OP8 Request for examination as to paragraph 44 patent law
8131 Rejection