JPH0681843A - Supercondctive bearing device - Google Patents
Supercondctive bearing deviceInfo
- Publication number
- JPH0681843A JPH0681843A JP4234509A JP23450992A JPH0681843A JP H0681843 A JPH0681843 A JP H0681843A JP 4234509 A JP4234509 A JP 4234509A JP 23450992 A JP23450992 A JP 23450992A JP H0681843 A JPH0681843 A JP H0681843A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- superconductor
- rotating body
- annular
- bearing device
- 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.)
- Pending
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
- F16C32/0436—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part
- F16C32/0438—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part with a superconducting body, e.g. a body made of high temperature superconducting material such as YBaCuO
-
- 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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、たとえば高速回転を
必要とする流体機械や工作機械、ジャイロスコープ、ま
たは余剰電力をフライホイールの運動エネルギに変換し
て貯蔵する電力貯蔵装置などに適用される超電導軸受装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to, for example, a fluid machine or a machine tool requiring high speed rotation, a gyroscope, or an electric power storage device for converting surplus electric power into kinetic energy of a flywheel for storage. The present invention relates to a superconducting bearing device.
【０００２】[0002]
【従来の技術】近年、固定部に対して回転体を非接触状
態で支持しうる超電導軸受装置が開発されている。2. Description of the Related Art In recent years, a superconducting bearing device has been developed which can support a rotating body in a non-contact state with a fixed portion.
【０００３】この種超電導軸受装置として、回転体に同
心状に設けられた環状永久磁石部と、この永久磁石部の
回転軸心方向の端面に対して回転体の回転軸心方向に間
隔をおいて対向するように配置された環状超電導体部と
を備えており、永久磁石部が、回転体に固定状にかつ同
心状に設けられるとともに超電導体部に対向する面に環
状の凹溝が形成された円板と、凹溝に嵌められかつ中心
が回転体の回転中心と同心状となされた環状永久磁石と
よりなり、超電導体部が円板と、円板に周方向に等間隔
をおいて近接するように設けられた複数の超電導体とよ
りなるものが考えられている。As a superconducting bearing device of this type, an annular permanent magnet portion concentrically provided on a rotating body and an end face in the rotating shaft center direction of the permanent magnet portion are spaced from each other in the rotating shaft direction of the rotating body. And the annular superconductor portion arranged to face each other, the permanent magnet portion is fixedly and concentrically provided on the rotating body, and an annular groove is formed on the surface facing the superconductor portion. And a circular permanent magnet that is fitted in the groove and has a center concentric with the center of rotation of the rotating body.The superconductor portion is a disk and the disk is evenly spaced in the circumferential direction. And a plurality of superconductors provided so as to be close to each other is considered.
【０００４】この超電導軸受装置では、作動時には、ま
ず回転体と固定部に配置された環状超電導体部の中心を
合わせておき、さらに回転体と固定部とを軸方向に離隔
させた状態で超電導体を冷却して超電導状態に保持する
ことにより、永久磁石部から発生する磁束を超電導体の
内部に侵入させて拘束し、その結果いわゆるピン止め力
によって、回転体を、固定部に対してアキシアル方向お
よびラジアル方向に非接触状態で支持するようになって
いる。そして、たとえば回転体の周囲に配置された高周
波電動機により回転体を回転させるようになっている。In this superconducting bearing device, during operation, first, the center of the annular superconductor portion arranged in the rotating body and the fixed portion are aligned with each other, and further, the rotating body and the fixed portion are axially separated from each other. By cooling the body and holding it in the superconducting state, the magnetic flux generated from the permanent magnet section is allowed to enter the inside of the superconductor to be restrained. It is designed to be supported in a non-contact state in both the radial and radial directions. Then, the rotating body is rotated by, for example, a high frequency electric motor arranged around the rotating body.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、環状永
久磁石の超電導体部と対向する面の表面磁束密度に周方
向のばらつきが生じることは避けられず、このばらつき
を考慮した磁場の中心が永久磁石の中心からずれること
になる。また、超電導体部の各超電導体の材質にばらつ
きが生じることも避けられない。その結果、回転体を回
転させたさいにラジアル方向のふれが発生し、回転体を
非接触状態で安定的に支持できないという問題がある。
しかも、回転体を非接触状態で安定的に支持できないた
めに回転体の高速回転が不可能になるという問題があ
る。However, it is unavoidable that the surface magnetic flux density of the surface of the annular permanent magnet facing the superconductor portion varies in the circumferential direction, and the center of the magnetic field in consideration of this variation is the permanent magnet. It will deviate from the center of. Further, it is unavoidable that the materials of the superconductors of the superconductor portion vary. As a result, when rotating the rotating body, radial runout occurs, and there is a problem that the rotating body cannot be stably supported in a non-contact state.
Moreover, there is a problem that the rotating body cannot be rotated at a high speed because the rotating body cannot be stably supported in a non-contact state.
【０００６】この発明の目的は、上記の問題を解決した
超電導軸受装置を提供することにある。An object of the present invention is to provide a superconducting bearing device which solves the above problems.
【０００７】[0007]
【課題を解決するための手段】この発明による超電導軸
受装置は、回転体に同心状に設けられた環状の永久磁石
部と、この永久磁石部の端面に対して回転軸心方向に間
隔をおいて対向するように固定部に配置された環状の超
電導体部とを備えており、かつ固定部に対して回転体を
非接触状態で支持しうる超電導軸受装置であって、上記
超電導体部と固定部との間に、超電導体部のラジアル方
向のふれを減衰するダンパ装置が設けられているもので
ある。A superconducting bearing device according to the present invention has an annular permanent magnet portion concentrically provided on a rotating body and a space in the direction of the rotation axis from the end face of the permanent magnet portion. A superconducting bearing device comprising an annular superconductor portion arranged in a fixed portion so as to face each other, and capable of supporting a rotating body in a non-contact state with respect to the fixed portion, wherein the superconductor portion is A damper device for attenuating the radial deflection of the superconductor portion is provided between the fixed portion and the fixed portion.
【０００８】[0008]
【作用】この発明によれば、作動時に、回転体にラジア
ル方向のふれが発生した場合、永久磁石部にもふれが発
生し、永久磁石部と相互にピン止めされている超電導体
部にもふれが発生するが、このふれは、超電導体部と固
定部との間に設けられているダンパ装置により減衰さ
れ、その結果永久磁石部および回転体のふれも減衰され
る。したがって、回転体のふれが小さくなる。According to the present invention, when the rotor is radially deflected during operation, the permanent magnet portion is also deflected, and the superconductor portion mutually pinned with the permanent magnet portion is also deflected. Although swaying occurs, this swaying is damped by the damper device provided between the superconductor part and the fixed part, and as a result, the swaying of the permanent magnet part and the rotating body is also damped. Therefore, the runout of the rotating body is reduced.
【０００９】[0009]
【実施例】以下、図面を参照して、この発明の実施例に
ついて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１は、この発明の実施例の超電導軸受装
置の主要部の構成を概略的に示す。FIG. 1 schematically shows the structure of a main part of a superconducting bearing device according to an embodiment of the present invention.
【００１１】図１において、超電導軸受装置は、垂直軸
状の回転体(1) を備えている。図示は省略したが、回転
体(1) は、回転体(1) にとりつけられたロータと、固定
部に取付けられてロータの周囲に配置されたステータと
よりなる駆動用高周波電動機で高速回転させられるよう
になっている。回転体(1) には水平円板状の永久磁石部
(2) が同心状に設けられ、永久磁石部(2) の下端面に対
して回転体(1) の回転軸心方向に間隔をおいて対向する
ように、環状超電導体部(3) が固定部(4) に配置されて
いる。In FIG. 1, the superconducting bearing device comprises a vertical shaft-shaped rotating body (1). Although illustration is omitted, the rotating body (1) is rotated at a high speed by a high-frequency driving electric motor including a rotor mounted on the rotating body (1) and a stator mounted on a fixed part and arranged around the rotor. It is designed to be used. The rotor (1) has a horizontal disk-shaped permanent magnet part.
(2) are provided concentrically, and the annular superconductor part (3) is arranged so as to face the lower end surface of the permanent magnet part (2) with a gap in the direction of the rotation axis of the rotating body (1). It is located on the fixed part (4).
【００１２】永久磁石部(2) は、回転体(1) に固定状に
設けられた、たとえば銅あるいは非磁性ステンレス鋼か
らなる水平円板(5) を備えている。円板(5) の下面に回
転体(1) と同心状に環状凹みぞ(5a)が形成されており、
この凹みぞ(5a)内に環状永久磁石(6) が嵌め止められて
いる。The permanent magnet portion (2) is provided with a horizontal disk (5) fixedly provided on the rotating body (1) and made of, for example, copper or non-magnetic stainless steel. An annular groove (5a) is formed concentrically with the rotating body (1) on the lower surface of the disc (5).
An annular permanent magnet (6) is fitted and retained in the groove (5a).
【００１３】超電導体部(3) は、たとえば銅あるいは非
磁性ステンレス鋼からなりかつ固定部(4) の底壁(4a)上
に摺動自在に配置された水平環状体(7) を備えている。
環状体(7) の周縁と固定部(4) の周壁(4b)との間には隙
間が存在している。環状体(7) の周縁には、径方向外向
きの凹所(8) が、周方向に等角度間隔をおいて複数、た
とえば６個形成されている。この凹所(8) と対向するよ
うに、固定部(4) の周壁(4b)に、径方向内向きの凹所
(9) が形成されている。両凹所(8)(9)に振動減衰用コイ
ルばね（ダンパ装置）(10)の両端部が嵌められている。The superconductor part (3) comprises a horizontal annular body (7) made of, for example, copper or non-magnetic stainless steel and slidably arranged on the bottom wall (4a) of the fixed part (4). There is.
There is a gap between the peripheral edge of the annular body (7) and the peripheral wall (4b) of the fixed portion (4). On the peripheral edge of the annular body (7), a plurality of recesses (8) outward in the radial direction are formed at equal angular intervals in the circumferential direction, for example, six recesses (8) are formed. On the peripheral wall (4b) of the fixing part (4), facing the recess (8), a recess inward in the radial direction is formed.
(9) is formed. Both ends of a vibration damping coil spring (damper device) (10) are fitted into both recesses (8) and (9).
【００１４】また、環状体(7) の中心にはこれを上下に
貫通する穴(7a)が形成され、この貫通穴(7a)に回転体
(1) が隙間をおいて通されている。環状体(7) 内に環状
中空部(11)が形成され、この中に、周方向に等間隔をお
きかつ互いに近接するように、複数の円板状超電導体(1
2)が配置されている。環状体(7) に、その内部の環状中
空部(11)と連通するように、冷却流体供給管(13)および
同排出管(14)が配置されている。冷却流体供給管(13)お
よび同排出管(14)は、固定部(4) の周壁(4b)を摺動自在
に貫通しており、図示しない温度制御ユニットを介して
冷却装置などに接続されている。そして、冷却装置によ
り冷却流体供給管(13)、環状中空部(11)および冷却流体
排出管(14)を介して冷却流体が循環させられ、中空部(1
1)内に満たされる冷却流体により超電導体(12)が冷却さ
れる。Further, a hole (7a) is formed at the center of the annular body (7) so as to vertically penetrate therethrough, and the rotating body is inserted in the through hole (7a).
(1) is passed through with a gap. An annular hollow part (11) is formed in the annular body (7), and a plurality of disc-shaped superconductors (1) are formed in the annular hollow part (11) at equal intervals in the circumferential direction and close to each other.
2) is located. A cooling fluid supply pipe (13) and a discharge pipe (14) are arranged in the annular body (7) so as to communicate with the annular hollow portion (11) therein. The cooling fluid supply pipe (13) and the discharge pipe (14) penetrate the peripheral wall (4b) of the fixed part (4) slidably and are connected to a cooling device or the like via a temperature control unit (not shown). ing. Then, the cooling fluid is circulated through the cooling fluid supply pipe (13), the annular hollow portion (11) and the cooling fluid discharge pipe (14) by the cooling device, and the hollow portion (1
The superconductor (12) is cooled by the cooling fluid filled in (1).
【００１５】超電導体(12)は、第２種超電導体であり、
イットリウム系高温超電導体、たとえばＹＢａ２Ｃｕ３
Ｏｘからなるバルクの内部に常電導粒子（Ｙ２Ｂａ１Ｃ
ｕ１）を均一に混在させたものからなり、永久磁石部
(2) から発せられる磁束侵入を拘束する性質を持つもの
である。そして、超電導体(12)は、永久磁石部(2) の磁
束が所定量侵入する離間位置であってかつ上記回転体
(1) の回転によって侵入磁束の分布が変化しない位置に
配置されている。The superconductor (12) is a type 2 superconductor,
Yttrium-based high temperature superconductor such as YBa 2 Cu 3
Consisting O x within the bulk normally conductive particles (Y 2 Ba 1 C
u 1 ) are mixed uniformly, and the permanent magnet part
It has the property of restraining the penetration of the magnetic flux emitted from (2). And, the superconductor (12) is at the separated position where the magnetic flux of the permanent magnet part (2) enters a predetermined amount and the above-mentioned rotating body.
It is placed at a position where the distribution of the magnetic flux penetrating does not change due to the rotation of (1).
【００１６】超電導軸受装置を作動させる場合、回転体
(1) を固定部(4) に対して上昇させ、回転体(1) の固定
部(4) に対する相対的位置決めを行なう。これにより、
永久磁石部(2) と超電導体部(3) との軸方向および径方
向の相対的位置決めが行なわれる。ついで、各超電導体
(12)を環状中空部(11)内に循環させられる冷却流体によ
って冷却し、第２種超電導状態に保持する。すると、回
転体(1) の永久磁石部(2) から発せられる磁束の多くが
超電導体(12)の内部に侵入して拘束されることになる
（ピンニング現象）。ここで、超電導体(12)はその内部
に常電導体粒子が均一に混在されているため、超電導体
(12)内部への侵入磁束の分布が一定となり、いわゆるピ
ン止め力によって超電導体(12)に対して永久磁石部(2)
とともに回転体(1) が拘束される。したがって、回転体
(1) は、安定的に浮上した状態で、アキシアル方向およ
びラジアル方向に支持されることになる。このとき、超
電導体(12)に侵入した磁束は回転を妨げる抵抗とはなら
ない。When operating the superconducting bearing device, the rotating body
(1) is moved up with respect to the fixed part (4) to position the rotating body (1) relative to the fixed part (4). This allows
Axial and radial relative positioning of the permanent magnet part (2) and the superconductor part (3) is performed. Then, each superconductor
(12) is cooled by a cooling fluid circulated in the annular hollow portion (11) and is kept in a second-type superconducting state. Then, most of the magnetic flux generated from the permanent magnet part (2) of the rotating body (1) enters the inside of the superconductor (12) and is restricted (pinning phenomenon). Here, since the superconductor (12) has the normal conductor particles uniformly mixed therein,
(12) The distribution of the magnetic flux penetrating into the inside becomes constant, and the so-called pinning force causes the permanent magnet part (2) to the superconductor (12).
At the same time, the rotating body (1) is restrained. Therefore, the rotating body
In (1), it will be supported in the axial direction and the radial direction in a stable floating state. At this time, the magnetic flux that has entered the superconductor (12) does not become a resistance that prevents rotation.
【００１７】そして、回転体(1) が高周波電動機により
回転させられる。すると、永久磁石(6) の超電導体部
(3) と対向する面の表面磁束密度に周方向のばらつきが
生じていること、および各超電導体(12)の材質にばらつ
きが生じていることに起因して、回転体(1) にラジアル
方向のふれが発生する。回転体(1) にふれが発生する
と、当然のことながら永久磁石部(2) にもふれが発生
し、永久磁石部(2) と相互にピン止めされている超電導
体部(3) にもふれが発生する。このふれは、超電導体部
(3) と固定部(4) との間に設けられているコイルばね(1
0)により減衰され、その結果永久磁石部(2) のふれも減
衰される。したがって、回転体(1) のふれも減衰されて
小さくなる。Then, the rotating body (1) is rotated by the high frequency electric motor. Then, the superconductor part of the permanent magnet (6)
Due to variations in the surface magnetic flux density of the surface facing (3) in the circumferential direction, and variations in the material of each superconductor (12), the rotor (1) has radial Deflection of direction occurs. When the rotor (1) is shaken, naturally, the permanent magnet part (2) is also shaken, and the superconductor part (3) pinned to the permanent magnet part (2) is also pinched. Shaking occurs. This contact is the superconductor part
Coil spring (1) provided between (3) and fixed part (4)
It is damped by 0), and as a result, the runout of the permanent magnet part (2) is also damped. Therefore, the runout of the rotating body (1) is also attenuated and reduced.
【００１８】上記実施例においては、ダンパ装置は、振
動減衰用コイルばね(10)よりなるが、これに限るもので
はなく、適宜変更可能である。また、上記実施例におい
て、円板(5) と永久磁石(6) との間にダンパ装置を設け
ておいてもよい。In the above-described embodiment, the damper device is composed of the vibration damping coil spring (10), but the invention is not limited to this and can be changed as appropriate. Further, in the above embodiment, a damper device may be provided between the disc (5) and the permanent magnet (6).
【００１９】[0019]
【発明の効果】この発明の超電導軸受装置によれば、上
述のように、回転体のふれを小さくすることができる。
したがって、回転体を非接触状態で安定的に支持するこ
とができ、その結果回転体の高速回転が可能になる。As described above, according to the superconducting bearing device of the present invention, the runout of the rotating body can be reduced.
Therefore, the rotating body can be stably supported in a non-contact state, and as a result, the rotating body can rotate at high speed.
【図１】この発明の実施例を示す超電導軸受装置の概略
縦断面図である。FIG. 1 is a schematic vertical sectional view of a superconducting bearing device showing an embodiment of the present invention.
１ 回転体 ２ 環状永久磁石部 ３ 環状超電導体部 ４ 固定部 １０ 振動減衰用コイルばね（ダンパ装置） 1 Rotating Body 2 Annular Permanent Magnet Part 3 Annular Superconductor Part 4 Fixed Part 10 Vibration Damping Coil Spring (Damper Device)
Claims (1)
磁石部と、この永久磁石部の端面に対して回転軸心方向
に間隔をおいて対向するように固定部に配置された環状
の超電導体部とを備えており、かつ固定部に対して回転
体を非接触状態で支持しうる超電導軸受装置であって、 上記超電導体部と固定部との間に、超電導体部のラジア
ル方向のふれを減衰するダンパ装置が設けられている超
電導軸受装置。1. A ring-shaped permanent magnet portion concentrically provided on a rotating body, and a ring-shaped permanent magnet portion arranged on a fixed portion so as to face an end surface of the permanent magnet portion with a gap in a rotation axis direction. And a superconducting bearing device capable of supporting a rotating body in a non-contact state with respect to a fixed portion, the radial portion of the superconducting portion being provided between the superconducting portion and the fixed portion. A superconducting bearing device provided with a damper device for attenuating directional deviation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4234509A JPH0681843A (en) | 1992-09-02 | 1992-09-02 | Supercondctive bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4234509A JPH0681843A (en) | 1992-09-02 | 1992-09-02 | Supercondctive bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0681843A true JPH0681843A (en) | 1994-03-22 |
Family
ID=16972145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4234509A Pending JPH0681843A (en) | 1992-09-02 | 1992-09-02 | Supercondctive bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0681843A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7633202B2 (en) * | 2007-05-07 | 2009-12-15 | The Boeing Company | Damping in high-temperature superconducting levitation systems |
| US7633203B2 (en) * | 2008-01-02 | 2009-12-15 | The Boeing Company | Damping and support in high-temperature superconducting levitation systems |
| WO2020247410A1 (en) * | 2019-06-03 | 2020-12-10 | Powell Christopher Hugh | Remote structural reinforcement of the flywheel energy storage system |
-
1992
- 1992-09-02 JP JP4234509A patent/JPH0681843A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7633202B2 (en) * | 2007-05-07 | 2009-12-15 | The Boeing Company | Damping in high-temperature superconducting levitation systems |
| US7633203B2 (en) * | 2008-01-02 | 2009-12-15 | The Boeing Company | Damping and support in high-temperature superconducting levitation systems |
| WO2020247410A1 (en) * | 2019-06-03 | 2020-12-10 | Powell Christopher Hugh | Remote structural reinforcement of the flywheel energy storage system |
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| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20020219 |