JPH09242755A - Superconductive magnetic bearing - Google Patents
Superconductive magnetic bearingInfo
- Publication number
- JPH09242755A JPH09242755A JP8047425A JP4742596A JPH09242755A JP H09242755 A JPH09242755 A JP H09242755A JP 8047425 A JP8047425 A JP 8047425A JP 4742596 A JP4742596 A JP 4742596A JP H09242755 A JPH09242755 A JP H09242755A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- bearing
- iron plate
- circumferential direction
- filament winding
- 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
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
- F16C37/00—Cooling of bearings
- F16C37/005—Cooling of bearings of magnetic 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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/55—Flywheel systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えばフライホイ
ールに適用される超電導磁気軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting magnetic bearing applied to, for example, a flywheel.
【０００２】[0002]
【従来の技術】図３に、従来の高温超電導磁気軸受を示
す。２１はロータ、２２は第１のスラスト軸受用永久磁
石、２３は第２のスラスト軸受用永久磁石、２４（２４
ａ，２４ｂ）は磁石押さえ、２６は高温超電導体、２７
はハウジングで、２８はカバーで、２９は溶接部で、３
０は冷却ボックス、Ｘは注入口、Ｙは排出口である。2. Description of the Related Art FIG. 3 shows a conventional high temperature superconducting magnetic bearing. 21 is a rotor, 22 is a first thrust bearing permanent magnet, 23 is a second thrust bearing permanent magnet, and 24 (24
a, 24b) is a magnet holder, 26 is a high temperature superconductor, 27
Is a housing, 28 is a cover, 29 is a welded part, 3
0 is a cooling box, X is an inlet, and Y is an outlet.
【０００３】高温超電導体２６が超電導状態にあると、
マイスナー効果により、高温超電導体２６と永久磁石２
２，２３との間に磁気反発力が生じ、ローター２１が浮
上する。When the high temperature superconductor 26 is in a superconducting state,
Due to the Meissner effect, the high temperature superconductor 26 and the permanent magnet 2
A magnetic repulsive force is generated between the rotors 2 and 23 and the rotor 21 floats.
【０００４】[0004]
【発明が解決しようとする課題】高温超電導磁気軸受を
高速回転用として使う場合、従来は永久磁石を収納する
回転リング及び永久磁石に大きな円周方向応力が作用
し、大型、高速化が困難であった。即ち、円周応力σ
は、密度ρと周速（半径×回転数）ｒωの２乗に比例す
るが、Ｔｉ合金はρ＝４．５、引っ張り強度σB ＝１０
０ｋｇｆ／ｍｍ2 で、自ずからロータ径と回転数に限界
があり、永久磁石もρ＝７〜８、σB ＝８〜１０ｋｇｆ
／ｍｍ2 であり、さらに限界値が低い問題があった。When a high-temperature superconducting magnetic bearing is used for high-speed rotation, a large circumferential stress acts on the rotary ring and the permanent magnet that house the permanent magnet, making it difficult to increase the size and speed. there were. That is, the circumferential stress σ
Is proportional to the square of the density ρ and the peripheral speed (radius × rotational speed) rω, but for Ti alloy, ρ = 4.5 and tensile strength σ B = 10.
At 0 kgf / mm 2 , the rotor diameter and rotation speed are naturally limited, and the permanent magnets also have ρ = 7 to 8 and σ B = 8 to 10 kgf.
/ Mm 2, there is even less limit problem.
【０００５】また、従来の高温超電導磁気軸受の場合、
磁気回路の構成が不十分で軸受隙間内の磁束密度Ｂを大
きくとれず、大きな磁気反発面圧が得られなかった（磁
気反発面圧Ｐは磁束密度Ｂの２乗に比例する）。In the case of the conventional high temperature superconducting magnetic bearing,
The magnetic circuit configuration was insufficient and the magnetic flux density B in the bearing gap could not be made large, so that a large magnetic repulsive surface pressure could not be obtained (the magnetic repulsive surface pressure P is proportional to the square of the magnetic flux density B).
【０００６】[0006]
（１）永久磁石を収納する回転リングをフィラメントワ
インディング成型ＦＲＰとし、回転により生じる円周方
向反発応力の低減と円周方向強度の向上を同時に図っ
た。 （２）永久磁石リングを分割型として、一体型の場合に
生じる円周方向発生応力をたちきった。 （３）２組の互いに異なる極を有する永久磁石の一方の
極を磁性鉄板で連結し（即ち、超電導体に対向しない極
に磁路を構成する磁性体ヨークを配置）、他方の極を高
温超電導体に対向させる磁気回路とした点。(1) The rotating ring that houses the permanent magnet is a filament winding molded FRP, and the circumferential repulsive stress caused by the rotation is reduced and the circumferential strength is improved at the same time. (2) The permanent magnet ring is of the split type, and the stress generated in the circumferential direction in the case of the integral type is cut off. (3) One pole of two permanent magnets having mutually different poles is connected by a magnetic iron plate (that is, a magnetic yoke forming a magnetic path is arranged on the pole not facing the superconductor) and the other pole is heated to a high temperature. A magnetic circuit facing the superconductor.
【０００７】[0007]
【発明の実施の形態】図１、図２に本発明の一実施形態
を示す。図２の（ａ）は図１のＡ−Ａ’部の断面図で、
図２の（ｂ）はＢ−Ｂ’部の断面図である。１は、フィ
ラメントワインディング成型からなる外周側ＣＦＲＰリ
ング、２はフィラメントワインディング成型からなる内
周側ＣＦＲＰリング、３は外周側円周方向分割型永久磁
石リング、４は内周側円周方向分割型永久磁石リング、
５は磁性鉄板で、３、４の永久磁石リングは磁性鉄板５
に吸着され、かつ外周側及び内周側ＣＦＲＰリング１，
２に接着剤で接着され、一体成形され、本組立体はロー
タ６にボルト７で結合される構造になっている。８は高
温超電導バルク体で円周方向に複数個軸受ケーシング９
の中に埋め込まれ、シールプレート１０で覆われてい
る。冷却溝１１に、液体窒素がＸ方向に注入され、その
気泡がＹ方向に注出される。 （１）永久磁石３，４を収納する従来の金属リングの場
合、例えばＴｉ合金の場合、密度ρ＝４．５、引張強度
σB ＝１００ｋｇｆ／ｍｍ2 に対し、例えばＣＦＲＰの
場合ρ＝１．６、σB ＝３１０ｋｇｆ／ｍｍ2 となるた
め、同一寸法の回転体とした場合、約３倍、1 and 2 show an embodiment of the present invention. 2A is a cross-sectional view taken along the line AA ′ of FIG.
FIG. 2B is a sectional view of the BB 'portion. Reference numeral 1 is an outer peripheral CFRP ring formed by filament winding molding, 2 is an inner peripheral CFRP ring formed by filament winding molding, 3 is an outer circumferential circumferential split permanent magnet ring, and 4 is an inner circumferential circumferential split permanent. Magnet ring,
5 is a magnetic iron plate, and the permanent magnet rings 3 and 4 are magnetic iron plates 5.
CFRP ring 1, which is attached to the
2 is bonded to the rotor 6 with an adhesive and integrally molded, and this assembly is structured to be coupled to the rotor 6 by the bolt 7. 8 is a high temperature superconducting bulk body, and a plurality of bearing casings 9 are arranged in the circumferential direction.
Embedded inside and covered with a seal plate 10. Liquid nitrogen is injected into the cooling groove 11 in the X direction, and the bubbles thereof are extracted in the Y direction. (1) In the case of a conventional metal ring containing the permanent magnets 3 and 4, for example, a Ti alloy has a density ρ = 4.5 and a tensile strength σ B = 100 kgf / mm 2, whereas in the case of CFRP, ρ = 1. .6, σ B = 310 kgf / mm 2 , so if the rotor of the same size is used, it is about 3 times,
【０００８】[0008]
【数１】 の回転数が得られる。 （２）永久磁石３，４を分割型としたため、永久磁石に
一体型の場合に生じる大きな円周方向が作用しなくな
る。 （３）磁気回路中に、磁性鉄板５をいれることにより、
磁気抵抗が低減した結果、磁気軸受隙間内の磁束密度が
向上し、軸受の磁気反発面圧が上がる。又、ＣＦＲＰリ
ング１，２は密度ρが小さいため、軸受に作用する負荷
面圧が軽減し、良好な軸受負荷性能が得られる。 （４）上記ＣＦＲＰリング１，２、永久磁石３，４、磁
性鉄板５を一体組立するに永久磁石３，４と磁性鉄板５
の吸着力と、接着剤による接着力を利用することによ
り、ボルト締め付けが不要となり、切欠け等による応力
集中を防ぐことができ、高速回転が達成できる。[Equation 1] Is obtained. (2) Since the permanent magnets 3 and 4 are of the split type, the large circumferential direction that occurs when the permanent magnets are of the integral type does not act. (3) By inserting the magnetic iron plate 5 in the magnetic circuit,
As a result of the reduced magnetic resistance, the magnetic flux density in the magnetic bearing gap is improved, and the magnetic repulsive surface pressure of the bearing is increased. Further, since the CFRP rings 1 and 2 have a small density ρ, the load surface pressure acting on the bearing is reduced, and good bearing load performance can be obtained. (4) In order to integrally assemble the CFRP rings 1, 2, permanent magnets 3, 4 and magnetic iron plate 5, the permanent magnets 3, 4 and magnetic iron plate 5
By using the suction force and the adhesive force of the adhesive, bolt tightening becomes unnecessary, stress concentration due to notches and the like can be prevented, and high speed rotation can be achieved.
【０００９】[0009]
【発明の効果】１〜６の回転体は、永久磁石３及び４
と、高温超電導バルク体８の磁気反発作用により、安定
に浮上し、かつ永久磁石を収納するフィラメントワイン
ディング成形によるＣＦＲＰリングの高比高度（強度／
密度）特性と、円周方向発生応力をたちきった、分割型
永久磁石を組み合わせた軽量一体化構造とすることによ
り、高速回転が可能となる。The rotating bodies 1 to 6 are the permanent magnets 3 and 4.
And a high specific height (strength / strength / strength / strength) of the CFRP ring that is stably floated by the magnetic repulsion action of the high-temperature superconducting bulk body 8 and is formed by filament winding that houses the permanent magnet.
High-speed rotation is possible by using a light-weight integrated structure that combines split permanent magnets, which has excellent density characteristics and stress generated in the circumferential direction.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の第１実施形態に係わる高温超電導磁気
軸受の断面図。FIG. 1 is a sectional view of a high temperature superconducting magnetic bearing according to a first embodiment of the present invention.
【図２】図１の断面図。FIG. 2 is a sectional view of FIG.
【図３】従来の超電導磁気軸受の断面図。FIG. 3 is a sectional view of a conventional superconducting magnetic bearing.
１ フィラメントワインディング成型からなる外周側Ｃ
ＦＲＰリング ２ 内周側ＣＦＲＰリング ３ 外周側円周方向分割永久磁石リング ４ 内周側円周方向分割型永久磁石リング ５ 磁性鉄板 ６ ロータ ７ ボルト ８ 高温超電導バルク体 ９ 軸受ケーシング １０ シールプレート １１ 冷却溝1 Peripheral side C made of filament winding molding
FRP ring 2 Inner circumference side CFRP ring 3 Outer circumference side circumferentially-divided permanent magnet ring 4 Inner circumference side circumferentially-divided permanent magnet ring 5 Magnetic iron plate 6 Rotor 7 Bolt 8 High-temperature superconducting bulk body 9 Bearing casing 10 Seal plate 11 Cooling groove
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成８年３月２２日[Submission date] March 22, 1996
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００６】[0006]
【課題を解決するための手段】 （１）永久磁石を収納する回転リングをフィラメントワ
インディング成型ＦＲＰとし、回転により生じる円周方
向発生応力の低減と円周方向強度の向上を同時に図っ
た。 （２）永久磁石リングを分割型として、一体型の場合に
生じる円周方向発生応力をたちきった。 （３）２組の互いに異なる極を有する永久磁石の一方の
極を磁性鉄板で連結し（即ち、超電導体に対向しない極
に磁路を構成する磁性体ヨークを配置）、他方の極を高
温超電導体に対向させる磁気回路とした点。Means for Solving the Problems (1) The rotary ring for housing the permanent magnets and filament winding molding FRP, aimed improvement of reducing the circumferential strength of the circumferential generation stress caused by the rotation at the same time. (2) The permanent magnet ring is of the split type, and the stress generated in the circumferential direction in the case of the integral type is cut off. (3) One pole of two permanent magnets having mutually different poles is connected by a magnetic iron plate (that is, a magnetic yoke forming a magnetic path is arranged on the pole not facing the superconductor) and the other pole is heated to a high temperature. A magnetic circuit facing the superconductor.
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００９[Correction target item name] 0009
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００９】[0009]
【発明の効果】１〜６の回転体は、永久磁石３及び４
と、高温超電導バルク体８の磁気反発作用により、安定
に浮上し、かつ永久磁石を収納するフィラメントワイン
ディング成形によるＣＦＲＰリングの高比強度（強度／
密度）特性と、円周方向発生応力をたちきった、分割型
永久磁石を組み合わせた軽量一体化構造とすることによ
り、高速回転が可能となる。The rotating bodies 1 to 6 are the permanent magnets 3 and 4.
And the high specific strength (strength / strength / strength
High-speed rotation is possible by using a light-weight integrated structure that combines split permanent magnets, which has excellent density characteristics and stress generated in the circumferential direction.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 南 正晴 兵庫県高砂市荒井町新浜二丁目１番１号 三菱重工業株式会社高砂研究所内 (72)発明者 河島 裕 兵庫県高砂市荒井町新浜二丁目１番１号 三菱重工業株式会社高砂製作所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaharu Minami, 1-1 1-1 Niihama, Arai-cho, Takasago, Hyogo Prefecture Mitsubishi Heavy Industries, Ltd. Takasago Research Laboratory (72) Yutaka Kawashima 2-1-1, Niihama, Arai-cho, Takasago, Hyogo Prefecture No. 1 Mitsubishi Heavy Industries, Ltd. Takasago Plant
Claims (1)
た磁気軸受において、 内外径の異なる２個の一体型のフィラメントワインディ
ング成型ＦＲＰリングと、一方の端面を磁性鉄板から構
成された内外周部の凹部に、内外周の磁極を互いに異な
る極となるように円周方向に分割した永久磁石を組み込
んだことを特徴とする超電導磁気軸受。1. A magnetic bearing utilizing the magnetic repulsive force of a high temperature superconducting bulk body, comprising two integral type filament winding molded FRP rings having different inner and outer diameters, and an inner and outer peripheral portion having one end surface made of a magnetic iron plate. 2. A superconducting magnetic bearing, characterized in that a permanent magnet, in which the magnetic poles on the inner and outer circumferences are divided in the circumferential direction so as to be different poles from each other, is incorporated in the concave portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04742596A JP3349329B2 (en) | 1996-03-05 | 1996-03-05 | Superconducting magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04742596A JP3349329B2 (en) | 1996-03-05 | 1996-03-05 | Superconducting magnetic bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09242755A true JPH09242755A (en) | 1997-09-16 |
| JP3349329B2 JP3349329B2 (en) | 2002-11-25 |
Family
ID=12774811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04742596A Expired - Fee Related JP3349329B2 (en) | 1996-03-05 | 1996-03-05 | Superconducting magnetic bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3349329B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000026084A1 (en) * | 1998-11-02 | 2000-05-11 | The University Of Houston System | Satellite angular momentum control system using flywheels supported by superconductor magnetic bearings |
| JP2002276659A (en) * | 2001-03-16 | 2002-09-25 | Kenzo Miya | Superconductive magnetic bearing |
| KR20160060720A (en) * | 2013-09-26 | 2016-05-30 | 도미니언 얼터너티브 에너지 엘엘씨 | Superconductive electric motor and generator |
| CN106402174A (en) * | 2016-11-21 | 2017-02-15 | 南京磁谷科技有限公司 | Magnetic bearing cooling seat |
-
1996
- 1996-03-05 JP JP04742596A patent/JP3349329B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000026084A1 (en) * | 1998-11-02 | 2000-05-11 | The University Of Houston System | Satellite angular momentum control system using flywheels supported by superconductor magnetic bearings |
| JP2002276659A (en) * | 2001-03-16 | 2002-09-25 | Kenzo Miya | Superconductive magnetic bearing |
| KR20160060720A (en) * | 2013-09-26 | 2016-05-30 | 도미니언 얼터너티브 에너지 엘엘씨 | Superconductive electric motor and generator |
| CN105659477A (en) * | 2013-09-26 | 2016-06-08 | 领土替代能源有限责任公司 | Superconductive electric motor and generator |
| JP2016532431A (en) * | 2013-09-26 | 2016-10-13 | ドミニオン オルタナティブ エナジー、エルエルシー | Superconducting motor and generator |
| EP3050193A4 (en) * | 2013-09-26 | 2017-06-14 | Dominion Alternative Energy, LLC | Superconductive electric motor and generator |
| US9917500B2 (en) | 2013-09-26 | 2018-03-13 | Dominion Alternative Energy, Llc | Superconductive electro-magnetic device for use within a direct current motor or generator |
| JP2018061435A (en) * | 2013-09-26 | 2018-04-12 | ドミニオン オルタナティブ エナジー、エルエルシー | Superconduction motor and dynamo-electric generator |
| CN106402174A (en) * | 2016-11-21 | 2017-02-15 | 南京磁谷科技有限公司 | Magnetic bearing cooling seat |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3349329B2 (en) | 2002-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4115040A (en) | Permanent magnet type pump | |
| EP1830457A1 (en) | Axial-gap superconducting motor | |
| US6841912B2 (en) | Permanent magnet rotor | |
| US6806604B2 (en) | Centrifuge with a magnetically stabilized rotor for centrifugal goods | |
| US4120618A (en) | Permanent magnetic centrifugal pump | |
| JP2018151072A (en) | Nested-rotor open-core flywheel | |
| US5540116A (en) | Low-loss, high-speed, high-TC superconducting bearings | |
| US9673680B2 (en) | Electromechanical flywheels | |
| JPH09242755A (en) | Superconductive magnetic bearing | |
| US5554583A (en) | Permanent magnet design for high-speed superconducting bearings | |
| JPS6342180Y2 (en) | ||
| JPS60125456A (en) | Magnet coupling | |
| JPS57154516A (en) | Bearing device for rapidly rotating body | |
| JPH08200368A (en) | Superconducting magnetic bearing device | |
| JPH11257354A (en) | Rotor for magnetic bearing and superconductive magnetic bearing | |
| JP3233812B2 (en) | Radial bearing device | |
| CN210156196U (en) | Permanent magnet protector and magnet unit | |
| CN216216136U (en) | High-speed permanent magnet motor capable of reducing rotor loss and improving heat dissipation capacity of rotor | |
| Sung et al. | Effect of a passive magnetic damper in a flywheel system with a hybrid superconductor bearing set | |
| CN219394507U (en) | High-speed permanent magnet motor rotor structure | |
| JP3367068B2 (en) | Superconducting bearing | |
| JP2003299278A (en) | Rotor for rotating machine and its manufacturing method, rotating machine and gas turbine power plant | |
| LIU et al. | Design of permanent magnet systems using finite element analysis | |
| GB2205002A (en) | Permanent magnet rotor for a dynamo-electric machine | |
| SE466878B (en) | PERMANENT MAGNETIZED ROTATING ELECTRIC HIGH SPEED MACHINE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020813 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080913 Year of fee payment: 6 |
|
| LAPS | Cancellation because of no payment of annual fees |