JPH0741942Y2 - Rolling bearing - Google Patents
Rolling bearingInfo
- Publication number
- JPH0741942Y2 JPH0741942Y2 JP1990032645U JP3264590U JPH0741942Y2 JP H0741942 Y2 JPH0741942 Y2 JP H0741942Y2 JP 1990032645 U JP1990032645 U JP 1990032645U JP 3264590 U JP3264590 U JP 3264590U JP H0741942 Y2 JPH0741942 Y2 JP H0741942Y2
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- rolling bearing
- superconducting
- bearing
- rolling
- 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.)
- Expired - Fee Related
Links
Landscapes
- Other Surface Treatments For Metallic Materials (AREA)
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は、強磁場環境で使用される転がり軸受に関す
る。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a rolling bearing used in a strong magnetic field environment.
〈従来の技術〉 近年においては超電導磁石により強磁場の発生が容易に
なっている。この超電導磁石は例えばリニアモーターカ
ーや電磁推進船などの移送システムの推進力発生源とし
て利用される。<Prior Art> In recent years, generation of a strong magnetic field has been facilitated by a superconducting magnet. This superconducting magnet is used as a propulsive force generation source for a transfer system such as a linear motor car or an electromagnetic propulsion ship.
第４図にリニアモーターカーの概略構成を示している。
図中、60は車体、61は車体60が空気ばね62を介して搭載
される台枠、63は台枠61の幅方向両端に配設される超電
導磁石、64は超電導磁石63の下方の通路65に設置される
浮上用地上コイル、66は補助支持車輪、67は補助案内車
輪、68は案内枠である。FIG. 4 shows a schematic configuration of the linear motor car.
In the figure, 60 is a vehicle body, 61 is an underframe on which the vehicle body 60 is mounted via air springs 62, 63 is a superconducting magnet disposed at both ends in the width direction of the underframe 61, and 64 is a passage below the superconducting magnet 63. The levitation ground coil installed at 65, 66 is an auxiliary support wheel, 67 is an auxiliary guide wheel, and 68 is a guide frame.
とろこで、図示するように、超電導磁石63の近傍に補助
支持車輪66や補助案内車輪67が配置されていると、補助
支持車輪66や補助案内車輪67の図示しない回転支持用の
転がり軸受に対して、超電導磁石63で発生される強磁場
により下記のような悪影響を及ぼすことがある。As shown in the drawing, when the auxiliary support wheels 66 and the auxiliary guide wheels 67 are arranged in the vicinity of the superconducting magnet 63, as shown in the drawing, the auxiliary support wheels 66 and the auxiliary guide wheels 67 serve as rolling bearings (not shown) for rotation support. On the other hand, the strong magnetic field generated by the superconducting magnet 63 may have the following adverse effects.
すなわち、前記転がり軸受の軌道輪および転動体が軸受
鋼などの磁性材からなる場合、この軌道輪および転動体
が超電導磁石63による強磁場でもって磁化されるため
に、特に軌道輪における転動体の軌道面に、転動体の転
動により発生する摩耗粉や周囲の種々な塵埃が吸着さ
れ、軌道面と転動体との間にかみこむなどして軌道面の
摩耗を促進させる。That is, when the races and rolling elements of the rolling bearing are made of a magnetic material such as bearing steel, since the races and rolling elements are magnetized by the strong magnetic field by the superconducting magnet 63, the rolling elements especially in the races are Abrasion powder generated by rolling of the rolling elements and various dusts around the rolling elements are adsorbed on the raceway surface, and are caught between the raceway surface and the rolling elements to promote wear of the raceway surface.
そこで、転がり軸受の構成部品をセラミックスなどの非
磁性材とし、この転がり軸受が超電導磁石によって磁化
されないようにすれば、前述の問題の発生を回避するこ
とができる。Therefore, if the components of the rolling bearing are made of a non-magnetic material such as ceramics so that the rolling bearing is not magnetized by the superconducting magnet, the above-mentioned problems can be avoided.
〈考案が解決しようとする課題〉 しかしながら、前述のセラミックス製の転がり軸受は、
一般的な磁性材製の転がり軸受に比べて非常に高価であ
る点が指摘されるなど、他の解決策が望まれている。な
お、以上のことは、ニリアモーターカーに限らず、超電
導磁石を利用している各種の機器について共通すること
である。<Problems to be solved by the invention> However, the above-mentioned ceramic rolling bearing is
Other solutions are desired, such as being pointed out that they are much more expensive than general magnetic material rolling bearings. It should be noted that the above is common not only to the Nilia motor car but also to various devices using the superconducting magnet.
また、超電導磁石の配置空間を磁気シールドすることも
考えられるけれども、それでは装置の大型化や複雑化，
さらには高コスト化をもたらすことにもなりかねない。It is also possible to magnetically shield the space where the superconducting magnets are arranged, but this would increase the size and complexity of the device.
Furthermore, it may lead to higher costs.
本考案はこのような事情に鑑みて創案されたもので、安
価な構成で上記問題点の発生を回避することを目的とし
ている。The present invention was devised in view of such circumstances, and an object thereof is to avoid the occurrence of the above problems with an inexpensive configuration.
〈課題を解決するための手段〉 本考案は、このような目的を達成するために、次のよう
な構成をとる。<Means for Solving the Problem> In order to achieve such an object, the present invention has the following configuration.
本考案の転がり軸受は、軌道輪が磁性材からなり、か
つ、この軌道輪のうち少なくとも転動体の軌道面を除く
外表面に、磁気シールド用の超電導薄膜およびその上層
に保護用被膜が被覆されていることに特徴を有する。な
お、ここで言う磁気シールドとは、超電導薄膜のマイス
ナー効果による磁気反発を意味する。In the rolling bearing of the present invention, the bearing ring is made of a magnetic material, and at least the outer surface of the bearing ring excluding the raceway surface of the rolling element is coated with a superconducting thin film for magnetic shielding and a protective coating on the upper layer. It is characterized by The magnetic shield here means magnetic repulsion due to the Meissner effect of the superconducting thin film.
〈作用〉 すなわち、磁性材からなる軌道輪の外表面が反磁性を示
す超電導薄膜で覆われていれば、二つ一対の軌道輪間に
対向隙間が存在するものの、転がり軸受全体が磁場から
シールドされることになり、転がり軸受が磁化されなく
なる。したがって、転がり軸受の軌道輪軌道面と転動体
との摺接によって経時的に発生する摩耗粉などが軌道輪
軌道面に吸着せずに外部に排出されることになる。ま
た、超電導薄膜を保護用被膜で被覆しているから、超電
導薄膜が搬送過程や組み付け過程における万一の損傷を
阻止できるようになり、超電導薄膜の磁気シールド作用
を安定的に発揮させることができる。<Operation> That is, if the outer surface of the bearing ring made of a magnetic material is covered with a superconducting thin film that exhibits diamagnetism, the entire rolling bearing is shielded from the magnetic field, although there is a facing gap between two pairs of bearing rings. As a result, the rolling bearing is no longer magnetized. Therefore, abrasion powder and the like generated over time due to the sliding contact between the raceway raceway surface of the rolling bearing and the rolling element is discharged to the outside without being adsorbed on the raceway raceway raceway surface. In addition, since the superconducting thin film is covered with a protective film, the superconducting thin film can prevent any damage in the carrying process or the assembling process, and the magnetic shielding effect of the superconducting thin film can be stably exhibited. .
〈実施例〉 以下、本考案の実施例を図面に基づいて詳細に説明す
る。<Embodiment> An embodiment of the present invention will be described below in detail with reference to the drawings.
第１図および第２図に本考案の一実施例を示している。
ここではラジアル型の深溝玉軸受を例に挙げている。こ
れらの図において、１は内輪、２は外輪、３は転動体と
しての玉、４は玉３を回動自在に保持する冠形の保持
器、５は内輪１の外周面および外輪２の内周面を除く外
表面に被覆された超電導薄膜である。1 and 2 show an embodiment of the present invention.
Here, a radial type deep groove ball bearing is taken as an example. In these figures, 1 is an inner ring, 2 is an outer ring, 3 is a ball as a rolling element, 4 is a crown-shaped retainer for rotatably holding the ball 3, and 5 is an outer peripheral surface of the inner ring 1 and an inner ring of the outer ring 2. It is a superconducting thin film coated on the outer surface except the peripheral surface.
超電導薄膜５は、例えばＹ−Ba−Cu−Ｏ系の酸化物から
なり、内輪１や外輪２に対して周知の薄膜生成技術によ
り被覆される。The superconducting thin film 5 is made of, for example, a Y—Ba—Cu—O-based oxide, and covers the inner ring 1 and the outer ring 2 by a well-known thin film forming technique.
このような構成の転がり軸受の一側に、第２図に示すよ
うに、永久磁石６などが配置されている場合、永久磁石
６から発する磁束は、必ず閉ループとなっていて、超電
導薄膜５の磁気シールド作用でもって転がり軸受全体を
避けるので、転がり軸受が磁化されなくなる。When a permanent magnet 6 or the like is arranged on one side of the rolling bearing having such a configuration as shown in FIG. 2, the magnetic flux generated from the permanent magnet 6 is always in a closed loop, and the magnetic flux of the superconducting thin film 5 is Since the entire rolling bearing is avoided by the magnetic shield action, the rolling bearing is not magnetized.
なお、転がり軸受の内輪１と外輪２との間に径方向の対
向隙間があるが、この隙間に対しても永久磁石６から発
する磁束は僅かに侵入する程度となり、内部の奥深くま
では侵入しない。このことは、第３図に示すように、リ
ング状の超電導材７に対して永久磁石６を近づけた場合
でも、超電導材７の中心孔８に磁束が入り込まないこと
から判るであろう。There is a radially opposed gap between the inner ring 1 and the outer ring 2 of the rolling bearing, but the magnetic flux generated from the permanent magnet 6 only slightly penetrates into this gap and does not penetrate deep inside. . This can be understood from the fact that the magnetic flux does not enter the central hole 8 of the superconducting material 7 even when the permanent magnet 6 is brought close to the ring-shaped superconducting material 7 as shown in FIG.
上記転がり軸受が、第４図に示すリニアモーターカーの
保持支持車輪66や保持案内車輪67の回転支持部に利用さ
れる。The rolling bearing is used for the rotation supporting portion of the holding and supporting wheels 66 and the holding and guiding wheels 67 of the linear motor car shown in FIG.
ところで、本考案は、次のような構成のものも実施例と
して含む。すなわち、超電導薄膜５の表面に保護用被膜
（例えば鉄系金属）を被覆する構造としてもよいし、ま
た、超電導薄膜5,保護用薄膜，超電導薄膜5,保護用薄膜
・・・とこの記載順に軌道輪の外表面に積層する構造と
してもよい。この多層構造において超電導薄膜で挟まれ
る薄膜の素材は特に限定されないが、最上層としては超
電導薄膜５の表面保護や取付相手部材との嵌め合いを考
慮して鉄系金属とするのが好ましい。By the way, the present invention includes the following configurations as examples. That is, the surface of the superconducting thin film 5 may be covered with a protective film (for example, an iron-based metal), or the superconducting thin film 5, the protective thin film, the superconducting thin film 5, the protective thin film, and the like in this order. The structure may be laminated on the outer surface of the bearing ring. The material of the thin film sandwiched between the superconducting thin films in this multilayer structure is not particularly limited, but the uppermost layer is preferably made of an iron-based metal in consideration of surface protection of the superconducting thin film 5 and fitting with a mating member.
また、超電導薄膜５を内輪１の外周面および外輪２の内
周面のうち軌道面のみを除いた部分に被膜してもよい。Further, the superconducting thin film 5 may be coated on the outer peripheral surface of the inner ring 1 and the inner peripheral surface of the outer ring 2 except for the raceway surface.
〈考案の効果〉 以上説明したように、本考案によれば、磁性材からなる
軌道輪の外表面に被覆した超電導薄膜が磁気シールド効
果を発揮するので、軌道輪を比較的安価な磁性材で構成
しても、外部の強磁場によって軸受構成部品が磁化され
るのを確実に防止することができる。その結果、転がり
軸受の内部摩耗粉により軌道輪軌道面が異常摩耗するの
を回避できて長寿命化を達成できるようになる。<Effects of Device> As described above, according to the present invention, the superconducting thin film coated on the outer surface of the magnetic bearing ring exerts the magnetic shield effect, so that the magnetic bearing ring is made of a relatively inexpensive magnetic material. Even if configured, it is possible to reliably prevent the bearing component from being magnetized by the strong external magnetic field. As a result, it is possible to avoid abnormal wear on the raceway surface of the bearing ring due to the internal wear powder of the rolling bearing, and it is possible to achieve a longer life.
また、このような転がり軸受だと、それが用いられる強
磁場環境そのものを磁気シールドする必要がなくなり、
その点からも構成機器全体のコスト低減に貢献する。ま
た、超電導薄膜を保護用被膜で被覆しているから、超電
導薄膜が搬送過程や組み付け過程における万一の損傷を
阻止できるようになり、超電導薄膜の磁気シールド作用
を安定的に発揮させることができる。Also, with such a rolling bearing, there is no need to magnetically shield the strong magnetic field environment in which it is used,
From this point as well, it contributes to the cost reduction of the entire component equipment. In addition, since the superconducting thin film is covered with a protective film, the superconducting thin film can prevent any damage in the carrying process or the assembling process, and the magnetic shielding effect of the superconducting thin film can be stably exhibited. .
第１図および第２図は本考案の一実施例に係り、第１図
は転がり軸受の上半部を示す縦断面図、第２図は転がり
軸受の磁気シールド作用を示す模式図である。第３図は
リング状の超電導材における磁気シールド作用を示す模
式図である。 第４図はリニアモーターカーの概略構成を示す縦断面図
である。 １……内輪、２……外輪 ３……玉、５……超電導薄膜1 and 2 relate to an embodiment of the present invention. FIG. 1 is a vertical sectional view showing an upper half of a rolling bearing, and FIG. 2 is a schematic view showing a magnetic shield action of the rolling bearing. FIG. 3 is a schematic view showing the magnetic shield action of the ring-shaped superconducting material. FIG. 4 is a vertical sectional view showing a schematic configuration of the linear motor car. 1 ... Inner ring, 2 ... Outer ring 3 ... Ball, 5 ... Superconducting thin film
Claims (1)
輪のうち少なくとも転動体の軌道面を除く外表面に、磁
気シールド用の超電導薄膜およびその上層に保護用被膜
が被覆されていることを特徴とする転がり軸受。1. A bearing ring is made of a magnetic material, and at least the outer surface of the bearing ring excluding the raceway surface of a rolling element is coated with a superconducting thin film for magnetic shield and a protective coating on the upper layer thereof. A rolling bearing characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990032645U JPH0741942Y2 (en) | 1990-03-27 | 1990-03-27 | Rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990032645U JPH0741942Y2 (en) | 1990-03-27 | 1990-03-27 | Rolling bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03123119U JPH03123119U (en) | 1991-12-16 |
| JPH0741942Y2 true JPH0741942Y2 (en) | 1995-09-27 |
Family
ID=31535731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990032645U Expired - Fee Related JPH0741942Y2 (en) | 1990-03-27 | 1990-03-27 | Rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741942Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101398213B1 (en) * | 2013-03-27 | 2014-05-27 | 화신공업주식회사 | Stapler |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6430144A (en) * | 1987-07-23 | 1989-02-01 | Matsushita Electric Ind Co Ltd | Color cathode-ray tube |
| JPH01109252U (en) * | 1988-01-11 | 1989-07-24 | ||
| JP2571594B2 (en) * | 1988-01-14 | 1997-01-16 | エヌティエヌ株式会社 | Anti-corrosion rolling bearing |
| JPH0271597A (en) * | 1988-09-06 | 1990-03-12 | Hitachi Chem Co Ltd | Manufacture of superconductive magnetic shield material |
-
1990
- 1990-03-27 JP JP1990032645U patent/JPH0741942Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03123119U (en) | 1991-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |