JP2019207917A - Superconductive coil body, superconducting coil assembly, and superconducting apparatus - Google Patents
Superconductive coil body, superconducting coil assembly, and superconducting apparatus Download PDFInfo
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Abstract
Description
この発明は、超電導コイル体、超電導コイル集合体および超電導機器に関する。 The present invention relates to a superconducting coil body, a superconducting coil assembly, and a superconducting device.
従来、超電導線材を巻回したコイルを積層して構成された超電導コイル体が知られている（たとえば、特開２０１５−７３０６９号公報および特開２０１７−１１２２５４号公報参照）。 2. Description of the Related Art Conventionally, a superconducting coil body configured by stacking coils around which a superconducting wire is wound is known (see, for example, Japanese Patent Application Laid-Open Nos. 2015-73069 and 2017-112254).
特開２０１５−７３０６９号公報では、超電導線材からなる複数のコイルを、円筒状の芯材に通して積層配置した構成が開示されている。また、特開２０１７−１１２２５４号公報では、複数のコイルが冷却板を介して積層された構成が開示されている。特開２０１７−１１２２５４号公報では、冷却板がその内周部に嵌め合い機構を含み、当該嵌め合い機構によって冷却板および複数のコイルの径方向での位置が位置決めされている。 Japanese Patent Laying-Open No. 2015-73069 discloses a configuration in which a plurality of coils made of a superconducting wire are stacked and disposed through a cylindrical core material. Japanese Patent Application Laid-Open No. 2017-112254 discloses a configuration in which a plurality of coils are stacked via a cooling plate. In Japanese Patent Application Laid-Open No. 2017-112254, the cooling plate includes a fitting mechanism on its inner peripheral portion, and the positions of the cooling plate and the plurality of coils in the radial direction are positioned by the fitting mechanism.
特開２０１５−７３０６９号公報に開示された構成では、コイルを円筒状の芯材に通すため、当該コイルの内周側の開口部における径は芯材の外径より大きくなっている。さらに、コイルや芯材などの部品の寸法については、一定の加工誤差が含まれる。また、芯材に複数のコイルを通して積層するときに、各コイルの芯材に対する径方向での位置は組立誤差を含む。したがって、特開２０１５−７３０６９号公報に開示された超電導コイル体では、各コイルの径方向における配置が上記誤差に起因してばらつき、結果的に均一な磁場を形成することが難しかった。 In the configuration disclosed in Japanese Patent Application Laid-Open No. 2015-73069, the coil is passed through the cylindrical core material, and therefore the diameter of the opening on the inner peripheral side of the coil is larger than the outer diameter of the core material. Furthermore, a certain processing error is contained about the dimension of components, such as a coil and a core material. Moreover, when laminating | stacking a core material through a some coil, the position in the radial direction with respect to the core material of each coil contains an assembly error. Therefore, in the superconducting coil body disclosed in Japanese Patent Application Laid-Open No. 2015-73069, the arrangement of the coils in the radial direction varies due to the error, and as a result, it is difficult to form a uniform magnetic field.
一方、均一な磁場を得るため、上記のような各コイルの径方向における配置のばらつきを抑制する観点からコイルの開口部の径と芯材の外径との差を小さくすることが考えられる。しかし、この場合超電導コイル体の組み立てが難しく、結果的に超電導コイル体の製造コストが増大するという問題があった。 On the other hand, in order to obtain a uniform magnetic field, it is conceivable to reduce the difference between the diameter of the opening of the coil and the outer diameter of the core material from the viewpoint of suppressing the variation in the arrangement of the coils in the radial direction as described above. However, in this case, it is difficult to assemble the superconducting coil body, resulting in an increase in the manufacturing cost of the superconducting coil body.
また、特開２０１７−１１２２５４号公報に開示された構成では、全ての冷却板に嵌め合い機構という複雑かつ高い寸法精度が必要な構造を形成する必要があり、結果的に超電導コイル体の構造が複雑化して超電導コイル体の製造コストが増大するという問題があった。 Further, in the configuration disclosed in Japanese Patent Application Laid-Open No. 2017-112254, it is necessary to form a structure that requires a complicated and high dimensional accuracy such as a fitting mechanism on all the cooling plates. As a result, the structure of the superconducting coil body is There is a problem that the manufacturing cost of the superconducting coil body is increased due to the complexity.
本発明の一態様の目的は、製造コストの増大を抑制しつつ、高い均一性を有する磁場を形成することが可能な超電導コイル体、当該超電導コイル体を用いた超電導コイル集合体および超電導機器を提供することである。 An object of one embodiment of the present invention is to provide a superconducting coil body capable of forming a magnetic field having high uniformity while suppressing an increase in manufacturing cost, a superconducting coil assembly and a superconducting device using the superconducting coil body. Is to provide.
本発明の一態様に係る超電導コイル体は、超電導コイルと、第１フランジ部材と、第２フランジ部材と、複数の整列部材とを備える。超電導コイルは、超電導線材が巻回された複数のコイル要素が積層されて構成されたものである。第１フランジ部材および第２フランジ部材は、複数のコイル要素の積層方向において、超電導コイルの両端部に位置する。複数の整列部材は、第１フランジ部材と第２フランジ部材とを接続するとともに、超電導コイルを積層方向と交差する方向から押圧する。複数の整列部材は、複数のコイル要素を積層方向において整列させる。 A superconducting coil body according to an aspect of the present invention includes a superconducting coil, a first flange member, a second flange member, and a plurality of alignment members. A superconducting coil is configured by laminating a plurality of coil elements each wound with a superconducting wire. The first flange member and the second flange member are located at both ends of the superconducting coil in the stacking direction of the plurality of coil elements. The plurality of alignment members connect the first flange member and the second flange member and press the superconducting coil from the direction intersecting the stacking direction. The plurality of alignment members align the plurality of coil elements in the stacking direction.
本発明の一態様に係る超電導コイル集合体は、積層配置された複数の超電導コイル体と、複数のコイル体整列部材とを備える。複数のコイル体整列部材は、複数の超電導コイル体を積層方向において整列させる。上記超電導コイル体は、上述した本発明の一態様に係る超電導コイル体である。複数のコイル体整列部材は、複数の超電導コイル体を積層方向と交差する方向から押圧する。複数のコイル体整列部材は、複数の超電導コイル体を積層方向において整列させる。 A superconducting coil assembly according to an aspect of the present invention includes a plurality of superconducting coil bodies that are stacked and a plurality of coil body alignment members. The plurality of coil body alignment members align the plurality of superconducting coil bodies in the stacking direction. The superconducting coil body is the superconducting coil body according to one embodiment of the present invention described above. The plurality of coil body alignment members press the plurality of superconducting coil bodies from a direction crossing the stacking direction. The plurality of coil body alignment members align the plurality of superconducting coil bodies in the stacking direction.
本発明の一態様に係る超電導機器は、上記超電導コイル体を備える。 A superconducting device according to an aspect of the present invention includes the superconducting coil body.
上記によれば、製造コストの増大を抑制しつつ、高い均一性を有する磁場を形成することが可能な超電導コイル体、当該超電導コイル体を用いた超電導コイル集合体および超電導機器を提供できる。 According to the above, it is possible to provide a superconducting coil body capable of forming a magnetic field having high uniformity while suppressing an increase in manufacturing cost, a superconducting coil assembly and a superconducting device using the superconducting coil body.
[本発明の実施形態の説明]
最初に本発明の実施態様を列記して説明する。
[Description of Embodiment of the Present Invention]
First, embodiments of the present invention will be listed and described.
（１）本発明の一態様に係る超電導コイル体は、超電導コイルと、第１フランジ部材と、第２フランジ部材と、複数の整列部材とを備える。超電導コイルは、超電導線材が巻回された複数のコイル要素が積層されて構成されたものである。第１フランジ部材および第２フランジ部材は、複数のコイル要素の積層方向において、超電導コイルの両端部に位置する。複数の整列部材は、第１フランジ部材と第２フランジ部材とを接続するとともに、超電導コイルを積層方向と交差する方向から押圧する。複数の整列部材は、複数のコイル要素を積層方向において整列させる。 (1) A superconducting coil body according to an aspect of the present invention includes a superconducting coil, a first flange member, a second flange member, and a plurality of alignment members. A superconducting coil is configured by laminating a plurality of coil elements each wound with a superconducting wire. The first flange member and the second flange member are located at both ends of the superconducting coil in the stacking direction of the plurality of coil elements. The plurality of alignment members connect the first flange member and the second flange member and press the superconducting coil from the direction intersecting the stacking direction. The plurality of alignment members align the plurality of coil elements in the stacking direction.
このようにすれば、複数の整列部材が複数のコイル要素を積層方向と交差する方向から押圧することで、各コイル要素において複数の整列部材と接触する部分について、積層方向と交差する方向での配置を揃えることができる。この結果、積層方向と交差する方向において複数のコイル要素の位置が揃い、結果的に積層方向から見て複数のコイル要素の位置がそろった状態、つまり積層方向において複数のコイル要素が整列した状態を実現できる。したがって、積層方向において整列した複数のコイル要素により均一性の高い磁場を形成できる。 If it does in this way, a plurality of alignment members will press a plurality of coil elements from the direction which intersects with a lamination direction, and about a part which contacts a plurality of alignment members in each coil element in a direction which intersects with the lamination direction The arrangement can be aligned. As a result, the positions of the plurality of coil elements are aligned in the direction crossing the stacking direction, and as a result, the positions of the plurality of coil elements are aligned when viewed from the stacking direction, that is, the plurality of coil elements are aligned in the stacking direction Can be realized. Therefore, a highly uniform magnetic field can be formed by the plurality of coil elements aligned in the stacking direction.
また、単一の部材を複数のコイル要素に接触させて当該コイル要素を整列させる場合には、当該単一の部材の形状自体によりコイル要素の配置を決定するため、上記単一の部材の形状をコイル要素の形状と整合するように高精度で加工する必要がある。しかし、上記の超電導コイル体では複数の整列部材の形状および配置と、当該整列部材がコイル要素を押圧する押圧力とによりコイル要素の配置を決定しているため、整列部材の形状自体について求められる加工精度は相対的に低く、製造コストの増大を抑制できる。 When a single member is brought into contact with a plurality of coil elements and the coil elements are aligned, the shape of the single member is determined because the arrangement of the coil elements is determined by the shape of the single member itself. Must be processed with high accuracy so as to match the shape of the coil element. However, in the superconducting coil body, since the arrangement of the coil elements is determined by the shape and arrangement of the plurality of alignment members and the pressing force with which the alignment members press the coil elements, the shape of the alignment members themselves is required. Processing accuracy is relatively low, and an increase in manufacturing cost can be suppressed.
（２）上記超電導コイル体は、複数の整列部材と第１フランジ部材および第２フランジ部材とを接続する接続部材を備えていてもよい。接続部材は、複数の整列部材を第１フランジ部材または第２フランジ部材に向けて付勢する弾性部材を含んでいてもよい。 (2) The superconducting coil body may include a connection member that connects the plurality of alignment members to the first flange member and the second flange member. The connecting member may include an elastic member that biases the plurality of alignment members toward the first flange member or the second flange member.
この場合、超電導コイル体を運転するために冷却したときに、超電導コイルの熱収縮量と第１および第２フランジ部材の熱収縮量と複数の整列部材の熱収縮量とが異なっていても、上記弾性部材により複数の整列部材を第１および第２フランジ部材に向けて押圧した状態を維持できるので、当該整列部材と第１および第２フランジ部材との接続状態を維持し、結果的に当該整列部材により複数のコイル要素が整列された状態を維持できる。 In this case, when the superconducting coil body is cooled to operate, even if the heat shrinkage of the superconducting coil, the heat shrinkage of the first and second flange members, and the heat shrinkage of the plurality of alignment members are different, Since the state where the plurality of alignment members are pressed toward the first and second flange members by the elastic member can be maintained, the connection state between the alignment members and the first and second flange members is maintained. The alignment member can maintain a state in which a plurality of coil elements are aligned.
（３）上記超電導コイル体において、複数の整列部材は、超電導コイルの内周側に配置されていてもよい。この場合、複数のコイル要素の内周側の位置を整列部材により揃えることができる。 (3) In the superconducting coil body, the plurality of alignment members may be arranged on the inner peripheral side of the superconducting coil. In this case, the position of the inner peripheral side of the plurality of coil elements can be aligned by the alignment member.
（４）上記超電導コイル体において、複数の整列部材は、超電導コイルの外周側に配置されていてもよい。この場合、複数のコイル要素の外周側の位置を整列部材により揃えることができる。 (4) In the superconducting coil body, the plurality of alignment members may be arranged on the outer peripheral side of the superconducting coil. In this case, the positions on the outer peripheral side of the plurality of coil elements can be aligned by the alignment member.
（５）本発明の一態様に係る超電導コイル集合体は、積層配置された複数の超電導コイル体と、複数のコイル体整列部材とを備える。複数のコイル体整列部材は、複数の超電導コイル体を積層方向において整列させる。上記超電導コイル体は、上述した本発明の一態様に係る超電導コイル体である。複数のコイル体整列部材は、複数の超電導コイル体を積層方向と交差する方向から押圧する。複数のコイル体整列部材は、複数の超電導コイル体を積層方向において整列させる。 (5) A superconducting coil assembly according to an aspect of the present invention includes a plurality of superconducting coil bodies arranged in a stack and a plurality of coil body alignment members. The plurality of coil body alignment members align the plurality of superconducting coil bodies in the stacking direction. The superconducting coil body is the superconducting coil body according to one embodiment of the present invention described above. The plurality of coil body alignment members press the plurality of superconducting coil bodies from a direction crossing the stacking direction. The plurality of coil body alignment members align the plurality of superconducting coil bodies in the stacking direction.
この場合、複数のコイル要素の配置が揃った複数の超電導コイル体を、コイル体整列部材により整列して配置できるので、均一性の高い磁場を形成できる。また、複数の超電導コイル体のうちの一部に不良が発生した場合に、当該不良が発生した超電導コイル体だけを交換する、といった対応が可能になる。 In this case, a plurality of superconducting coil bodies in which a plurality of coil elements are arranged can be arranged and arranged by the coil body alignment member, so that a highly uniform magnetic field can be formed. Moreover, when a defect occurs in a part of the plurality of superconducting coil bodies, it is possible to cope with the problem by replacing only the superconducting coil body in which the defect has occurred.
（６）本発明の一態様に係る超電導機器は、上記超電導コイル体を備える。この場合、均一性の高い磁場を利用可能な超電導機器を実現できる。 (6) A superconducting device according to an aspect of the present invention includes the superconducting coil body. In this case, a superconducting device that can use a highly uniform magnetic field can be realized.
[本発明の実施形態の詳細]
以下、本発明の実施の形態について図面に基づいて説明する。なお、以下の図面において、同一または相当する部分には同一の参照符号を付し、その説明は繰返さない。
[Details of the embodiment of the present invention]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.
(実施の形態１）
＜超電導コイル体の構成＞
図１は、実施の形態１に係る超電導コイル体の斜視模式図である。図２は、図１に示した超電導コイル体の部分断面模式図である。図１および図２に示すように、実施の形態１に係る超電導コイル体１０は、超電導コイル４０と、第１フランジ部材３ａと、第２フランジ部材３ｂと、整列部材１と、軸方向固定部材４とを備える。図１に示す超電導コイル体１０では、整列部材１として３つの整列部材１ａ〜１ｃが配置されている。超電導コイル４０は、超電導線材が巻回された複数のコイル要素２が積層されて構成されたものである。複数のコイル要素２の間には冷却板６が配置されている。超電導コイル４０は、コイル要素２と冷却板６とが交互に積層された構造を有する。コイル要素２は、超電導コイル４０の中心軸２０を中心にして超電導線材が巻回されたものである。超電導線材としては任意の超電導材料を含む線材を用いることができるが、好ましくは酸化物超電導材料を含む高温超電導線材である。コイル要素２は、たとえばパンケーキコイルである。より好ましくは、コイル要素２はダブルパンケーキコイルである。
(Embodiment 1)
<Configuration of superconducting coil body>
FIG. 1 is a schematic perspective view of a superconducting coil body according to Embodiment 1. FIG. FIG. 2 is a schematic partial cross-sectional view of the superconducting coil body shown in FIG. As shown in FIGS. 1 and 2, the superconducting coil body 10 according to the first embodiment includes a superconducting coil 40, a first flange member 3a, a second flange member 3b, an alignment member 1, and an axial fixing member. 4. In the superconducting coil body 10 shown in FIG. 1, three alignment members 1 a to 1 c are arranged as the alignment member 1. The superconducting coil 40 is configured by laminating a plurality of coil elements 2 around which a superconducting wire is wound. A cooling plate 6 is disposed between the plurality of coil elements 2. Superconducting coil 40 has a structure in which coil elements 2 and cooling plates 6 are alternately stacked. The coil element 2 is obtained by winding a superconducting wire around the central axis 20 of the superconducting coil 40. As the superconducting wire, a wire containing any superconducting material can be used, but a high-temperature superconducting wire containing an oxide superconducting material is preferable. The coil element 2 is, for example, a pancake coil. More preferably, the coil element 2 is a double pancake coil.
冷却板６は、コイル要素２と積層される積層部分と、当該積層部分に連なり、冷凍機などの外部機器と接続される接続部分とを含む。冷却板６の積層部分の平面形状は、基本的にコイル要素２の平面形状と同様である。 The cooling plate 6 includes a laminated portion laminated with the coil element 2 and a connecting portion connected to the laminated portion and connected to an external device such as a refrigerator. The planar shape of the laminated portion of the cooling plate 6 is basically the same as the planar shape of the coil element 2.
第１フランジ部材３ａおよび第２フランジ部材３ｂは、複数のコイル要素２の積層方向（すなわち中心軸２０に沿った方向）において、超電導コイル４０の両端部に位置する。第１フランジ部材３ａおよび第２フランジ部材３ｂは、超電導コイル４０の両端部を覆うとともに、超電導コイル４０の外周面より外側に延在する部分および超電導コイル４０の内周面より内周側に延在する部分を含む。第１フランジ部材３ａおよび第２フランジ部材３ｂの平面形状は円環状である。第１フランジ部材３ａの内周部には、複数の整列部材１ａ〜１ｃの一方端部を固定するための固定部７ａが複数形成されている。第２フランジ部材３ｂの内周部には、複数の整列部材１ａ〜１ｃの上端である他方端部を固定するための固定部７ｂが複数形成されている。 The first flange member 3a and the second flange member 3b are located at both ends of the superconducting coil 40 in the stacking direction of the plurality of coil elements 2 (that is, the direction along the central axis 20). The first flange member 3 a and the second flange member 3 b cover both ends of the superconducting coil 40, extend to the outside from the outer peripheral surface of the superconducting coil 40 and the inner peripheral surface of the superconducting coil 40. Including existing parts. The planar shapes of the first flange member 3a and the second flange member 3b are annular. A plurality of fixing portions 7a for fixing one end portions of the plurality of alignment members 1a to 1c are formed on the inner peripheral portion of the first flange member 3a. A plurality of fixing portions 7b for fixing the other end, which is the upper end of the plurality of alignment members 1a to 1c, are formed on the inner peripheral portion of the second flange member 3b.
複数の整列部材１ａ〜１ｃは、第１フランジ部材３ａと第２フランジ部材３ｂとを接続するとともに、超電導コイル４０を積層方向と交差する方向から押圧する。具体的には、複数の整列部材１ａ〜１ｃは、超電導コイル４０の内周側に配置されている。複数の整列部材１ａ〜１ｃは、図２に示すように超電導コイル４０を構成する複数のコイル要素２の内周端面２ａを押圧する。図１では、整列部材１として３つの整列部材１ａ〜１ｃが配置されている。複数の整列部材１ａ〜１ｃは、複数のコイル要素２の開口部における端面である内周端面に、互いに間隔を隔てて接触している。複数の整列部材１ａ〜１ｃは、複数のコイル要素２の開口部の周方向において等間隔に配置されている。なお、複数の整列部材１ａ〜１ｃは当該周方向において異なる間隔を隔て配置されてもよい。図１では３つの整列部材１ａ〜１ｃを備える超電導コイル体１０が示されているが、整列部材１ａ〜１ｃの数は２でもよいが、３以上であることが好ましく、４以上でもよい。 The plurality of alignment members 1a to 1c connect the first flange member 3a and the second flange member 3b, and press the superconducting coil 40 from the direction intersecting the stacking direction. Specifically, the plurality of alignment members 1 a to 1 c are arranged on the inner peripheral side of the superconducting coil 40. The plurality of alignment members 1a to 1c press the inner peripheral end faces 2a of the plurality of coil elements 2 constituting the superconducting coil 40 as shown in FIG. In FIG. 1, three alignment members 1 a to 1 c are arranged as the alignment member 1. The plurality of alignment members 1 a to 1 c are in contact with the inner peripheral end surface, which is the end surface of the openings of the plurality of coil elements 2, at a distance from each other. The plurality of alignment members 1 a to 1 c are arranged at equal intervals in the circumferential direction of the openings of the plurality of coil elements 2. Note that the plurality of alignment members 1a to 1c may be arranged at different intervals in the circumferential direction. Although the superconducting coil body 10 including three alignment members 1a to 1c is shown in FIG. 1, the number of alignment members 1a to 1c may be two, but is preferably three or more, and may be four or more.
複数の整列部材１ａ〜１ｃでは、コイル要素２と接触する表面が平面であってもよいが、当該表面が曲面となっていてもよい。当該曲面の中心軸２０に沿った方向から見た曲率半径は、コイル要素２の内周端面の曲率半径と同じとしてもよいが、当該内周端面の曲率半径より小さくしてもよい。 In the plurality of alignment members 1a to 1c, the surface in contact with the coil element 2 may be a flat surface, but the surface may be a curved surface. The radius of curvature viewed from the direction along the central axis 20 of the curved surface may be the same as the radius of curvature of the inner peripheral end face of the coil element 2 or may be smaller than the radius of curvature of the inner peripheral end face.
複数の整列部材１ａ〜１ｃの下部である一方端部は、第１フランジ部材３ａの複数の固定部７ａに接続されている。複数の整列部材１ａ〜１ｃの上部である他方端部は、第２フランジ部材３ｂの複数の固定部７ｂに接続されている。整列部材１ａ〜１ｃの他方端部と第２フランジ部材３ｂの固定部７ｂとの接続部には、接続部材５０が配置されている。接続部材５０は、具体的にはボルト３１と、ナット３２と、弾性部材としての皿バネ３３とを含む。 One end, which is the lower part of the plurality of alignment members 1a to 1c, is connected to the plurality of fixing portions 7a of the first flange member 3a. The other end part which is the upper part of the some alignment member 1a-1c is connected to the some fixing | fixed part 7b of the 2nd flange member 3b. A connection member 50 is disposed at a connection portion between the other end of the alignment members 1a to 1c and the fixing portion 7b of the second flange member 3b. Specifically, the connection member 50 includes a bolt 31, a nut 32, and a disc spring 33 as an elastic member.
たとえば図２に示すように、ボルト３１は整列部材１ａの内周側から穴３４に通され、第２フランジ部材３ｂの穴３８を介して開口部３５にまで到達するように配置されている。ナット３２は、第２フランジ部材３ｂの開口部３５内部においてボルト３１の端部に固定される。また、皿バネ３３はボルト３１に取付けられるとともに、ナット３２と開口部３５の内周面（穴３４が開口している内周面）との間に配置されている。ナット３２は皿バネ３３を整列部材１ａ側の方向に押圧した状態で、ボルト３１に固定される。このため、皿バネ３３が弾性変形することで、ボルト３１および整列部材１ａを第２フランジ部材３ｂ側に引き寄せる力が発生している。また、図２に示すように、第２フランジ部材３ｂと整列部材１ａとの接続部において、整列部材１ａと第２フランジ部材３ｂの固定部７ｂとの間には隙間が形成されている。このようにすれば、整列部材１ａは皿バネ３３により第２フランジ部材３ｂ側に向かうように付勢されているため、結果的に整列部材１ａがコイル要素２の内周端面２ａを押圧する。 For example, as shown in FIG. 2, the bolt 31 is passed through the hole 34 from the inner peripheral side of the alignment member 1a and arranged to reach the opening 35 through the hole 38 of the second flange member 3b. The nut 32 is fixed to the end of the bolt 31 inside the opening 35 of the second flange member 3b. The disc spring 33 is attached to the bolt 31 and is disposed between the nut 32 and the inner peripheral surface of the opening 35 (the inner peripheral surface where the hole 34 is opened). The nut 32 is fixed to the bolt 31 in a state where the disc spring 33 is pressed in the direction toward the alignment member 1a. For this reason, the force which draws the volt | bolt 31 and the alignment member 1a to the 2nd flange member 3b side generate | occur | produces because the disc spring 33 elastically deforms. As shown in FIG. 2, a gap is formed between the alignment member 1a and the fixing portion 7b of the second flange member 3b at the connection portion between the second flange member 3b and the alignment member 1a. If it does in this way, since the alignment member 1a is urged | biased by the disc spring 33 toward the 2nd flange member 3b side, the alignment member 1a will press the inner peripheral end surface 2a of the coil element 2 as a result.
また、整列部材１ａ〜１ｃと第１フランジ部材３ａまたは第２フランジ部材３ｂとの接続部の構造は、図２に示した整列部材１ａと第２フランジ部材３ｂとの接続部の構造と同様である。この結果、複数の整列部材１ａ〜１ｃが、複数のコイル要素２の内周端面２ａの複数個所を押圧することで、結果的に整列部材１ａ〜１ｃのコイル要素２との接触面に沿って複数のコイル要素が整列する。すなわち、複数の整列部材１ａ〜１ｃは、複数のコイル要素２を積層方向において整列させている。なお、第１フランジ部材３ａおよび第２フランジ部材３ｂの内周部には、実施の形態２において説明するコイル体整列部材１０１ａ〜１０１ｃ（図９参照）を接続するための固定部５が形成されている。固定部５の構造は基本的には固定部７ａ、７ｂと同様である。 The structure of the connecting portion between the alignment members 1a to 1c and the first flange member 3a or the second flange member 3b is the same as the structure of the connecting portion between the alignment member 1a and the second flange member 3b shown in FIG. is there. As a result, the plurality of alignment members 1 a to 1 c press a plurality of locations on the inner peripheral end surfaces 2 a of the plurality of coil elements 2, and as a result, along the contact surfaces of the alignment members 1 a to 1 c with the coil elements 2. A plurality of coil elements are aligned. That is, the plurality of alignment members 1a to 1c align the plurality of coil elements 2 in the stacking direction. In addition, the fixing | fixed part 5 for connecting the coil body alignment members 101a-101c (refer FIG. 9) demonstrated in Embodiment 2 is formed in the inner peripheral part of the 1st flange member 3a and the 2nd flange member 3b. ing. The structure of the fixing portion 5 is basically the same as that of the fixing portions 7a and 7b.
ここで、コイル要素２と積層されている冷却板６は、その積層部分において、コイル要素２の開口部に対応する開口部が形成されている。図２に示すように、冷却板６の開口部の内周端面は、整列部材１ａ〜１ｃと接触している。この場合、複数の冷却板６も複数のコイル要素２と同様に、整列部材１ａ〜１ｃにより積層方向において整列される。ただし、冷却板６の開口部の内周端面が整列部材１ａ〜１ｃと接触しない構成としてもよい。 Here, the cooling plate 6 laminated with the coil element 2 has an opening corresponding to the opening of the coil element 2 in the laminated portion. As shown in FIG. 2, the inner peripheral end face of the opening of the cooling plate 6 is in contact with the alignment members 1a to 1c. In this case, the plurality of cooling plates 6 are also aligned in the stacking direction by the alignment members 1a to 1c, similarly to the plurality of coil elements 2. However, it is good also as a structure which the inner peripheral end surface of the opening part of the cooling plate 6 does not contact with the alignment members 1a-1c.
図１に示すように、第１フランジ部材３ａの外周部と第２フランジ部材３ｂの外周部とは、複数の軸方向固定部材４により接続されている。複数の軸方向固定部材４は、たとえばボルトおよびナットである。複数の軸方向固定部材４は、第１および第２フランジ部材３ａ、３ｂの外周部において、周方向に互いに間隔を隔てて配置されている。複数の軸方向固定部材４は、上記周方向に等間隔に配置されていてもよい。複数の軸方向固定部材４は、第１フランジ部材３ａおよび第２フランジ部材３ｂが超電導コイル４０を中心軸２０に沿った方向から押圧するように、第１および第２フランジ部材３ａ、３ｂに取付けられている。 As shown in FIG. 1, the outer peripheral portion of the first flange member 3 a and the outer peripheral portion of the second flange member 3 b are connected by a plurality of axial fixing members 4. The plurality of axial fixing members 4 are, for example, bolts and nuts. The plurality of axial fixing members 4 are arranged at intervals in the circumferential direction on the outer peripheral portions of the first and second flange members 3a and 3b. The plurality of axial fixing members 4 may be arranged at equal intervals in the circumferential direction. The plurality of axial fixing members 4 are attached to the first and second flange members 3a and 3b so that the first flange member 3a and the second flange member 3b press the superconducting coil 40 from the direction along the central axis 20. It has been.
＜超電導コイル体の製造方法＞
図３は、図１に示した超電導コイル体の製造方法を説明するためのフローチャートである。図４〜図８は、図１に示した超電導コイル体の製造方法を説明するための模式図である。図３〜図８を参照しながら、図１に示した超電導コイル体の製造方法を説明する。
<Manufacturing method of superconducting coil body>
FIG. 3 is a flowchart for explaining a method of manufacturing the superconducting coil body shown in FIG. 4 to 8 are schematic views for explaining a method of manufacturing the superconducting coil body shown in FIG. A method of manufacturing the superconducting coil body shown in FIG. 1 will be described with reference to FIGS.
超電導コイル体の製造方法では、図３に示すように、まず準備工程（Ｓ１０）を実施する。この工程（Ｓ１０）では、第１および第２フランジ部材３ａ、３ｂや複数の整列部材１ａ〜１ｃなど、図１に示す超電導コイル体１０の構成部材を準備する。そして、図４に示すように、第１フランジ部材３ａの３つの固定部７ａに、整列部材１ａ〜１ｃの一方端部を固定する。このとき、整列部材１ａ〜１ｃは、第１フランジ部材３ａの３つの固定部７ａにそれぞれ図２に示す接続部材５０により固定される。また、２つの整列部材１ｂ、１ｃにおける接続部材５０でのボルトの締め代より、整列部材１ａにおける接続部材５０でのボルト３１の締め代を多く残しておく。なお、２つの整列部材１ｂ、１ｃは接続部材５０としてボルト３１とナット３２のみを用いて、第１フランジ部材３ａに固定してもよい。 In the method for manufacturing a superconducting coil body, as shown in FIG. In this step (S10), constituent members of the superconducting coil body 10 shown in FIG. 1, such as the first and second flange members 3a and 3b and the plurality of alignment members 1a to 1c, are prepared. And as shown in FIG. 4, the one end part of the alignment members 1a-1c is fixed to the three fixing | fixed part 7a of the 1st flange member 3a. At this time, the alignment members 1a to 1c are fixed to the three fixing portions 7a of the first flange member 3a by the connecting members 50 shown in FIG. In addition, more bolting allowance of the bolt 31 at the connection member 50 in the alignment member 1a is left than the bolting allowance at the connection member 50 in the two alignment members 1b and 1c. The two alignment members 1b and 1c may be fixed to the first flange member 3a using only the bolt 31 and the nut 32 as the connection member 50.
なお、整列部材１ａ〜１ｃは、固定部７ａと接触する表面の形状を正確に加工しておくことが好ましい。また、第１フランジ部材３ａは表面（中心軸２０に沿った方向から見た表面）の形状を正確に加工しておくことが好ましい。このようにして、整列部材１ａ〜１ｃの延在方向が第１フランジ部材３ａの上記表面に対して９０°の角度となるようにすることが好ましい。 In addition, it is preferable that the alignment members 1a-1c process the shape of the surface which contacts the fixing | fixed part 7a correctly. Moreover, it is preferable that the shape of the surface (surface seen from the direction along the central axis 20) of the 1st flange member 3a is processed correctly. In this way, it is preferable that the extending direction of the alignment members 1a to 1c is an angle of 90 ° with respect to the surface of the first flange member 3a.
次に、図３の超電導コイル要素を積層する工程（Ｓ２０）を実施する。この工程（Ｓ２０）では、図５に示すように第１フランジ部材３ａ上に複数のコイル要素２および冷却板６を交互に積層する。このとき、コイル要素２の内周端面および冷却板６の開口部の内周端面に整列部材１ａ〜１ｃが面するように、各コイル要素２および冷却板６を積層する。ここで、上記工程（Ｓ１０）では整列部材１ａについて接続部材５０でのボルト３１の締め代を相対的に多く残しているため、整列部材１ａは他の整列部材１ｂ、１ｃよりも内周側に位置している。そのため、コイル要素２および冷却板６を積層する作業においてコイル要素２および冷却板６と整列部材１ａとの干渉が起きず、当該作業を容易に実施できる。 Next, a step (S20) of stacking the superconducting coil elements of FIG. 3 is performed. In this step (S20), a plurality of coil elements 2 and cooling plates 6 are alternately laminated on the first flange member 3a as shown in FIG. At this time, each coil element 2 and the cooling plate 6 are laminated so that the alignment members 1 a to 1 c face the inner peripheral end surface of the coil element 2 and the inner peripheral end surface of the opening of the cooling plate 6. Here, in the above-described step (S10), the alignment member 1a leaves a relatively large margin for tightening the bolt 31 at the connecting member 50, so that the alignment member 1a is located on the inner peripheral side with respect to the other alignment members 1b and 1c. positioned. Therefore, interference between the coil element 2 and the cooling plate 6 and the alignment member 1a does not occur in the operation of stacking the coil element 2 and the cooling plate 6, and the operation can be easily performed.
次に、整列部材を締め付ける工程（Ｓ３０）を実施する。この工程（Ｓ３０）では、超電導コイル４０（図１参照）となるべき複数のコイル要素２および冷却板６上に、第２フランジ部材３ｂを配置する。そして、図８に示すように、複数の整列部材１ａ〜１ｃを第２フランジ部材３ｂの固定部７ｂに接続部材５０を用いて固定する。具体的には、整列部材１ａは接続部材５０としてのボルト３１ａ、ナット３２ａおよび皿バネ３３により第２フランジ部材３ｂに接続される。整列部材１ｂは接続部材５０としてのボルト３１ｂ、ナット３２ｂおよび皿バネ３３により第２フランジ部材３ｂに接続される。整列部材１ｃは接続部材５０としてのボルト３１ｃ、ナット３２ｃおよび皿バネ３３により第２フランジ部材３ｂに接続される。 Next, a step (S30) of tightening the alignment member is performed. In this step (S30), the second flange member 3b is disposed on the plurality of coil elements 2 and the cooling plate 6 to be the superconducting coil 40 (see FIG. 1). And as shown in FIG. 8, the some alignment member 1a-1c is fixed to the fixing | fixed part 7b of the 2nd flange member 3b using the connection member 50. As shown in FIG. Specifically, the alignment member 1 a is connected to the second flange member 3 b by a bolt 31 a as a connection member 50, a nut 32 a and a disc spring 33. The alignment member 1 b is connected to the second flange member 3 b by a bolt 31 b as a connection member 50, a nut 32 b and a disc spring 33. The alignment member 1 c is connected to the second flange member 3 b by a bolt 31 c as a connection member 50, a nut 32 c and a disc spring 33.
このとき、整列部材１ａと第１フランジ部材３ａとを接続する接続部材５０についても、ボルト３１を増し締めする。この結果、図７の矢印３６に示すように、整列部材１ａがコイル要素２の内周端面側に移動する。このようにして、全ての整列部材１ａ〜１ｃと第１フランジ部材３ａおよび第２フランジ部材３ｂが固定される。また、全ての整列部材１ａ〜１ｃの表面が図２に示すようにコイル要素２の内周端面２ａを押圧する。この結果、積層されたコイル要素２が積層方向において整列部材１ａ〜１ｃの表面に沿って整列する。その後、第１フランジ部材３ａと第２フランジ部材３ｂとを接続するように複数の軸方向固定部材４を設置することにより、超電導コイル要素を積層方向において締め付ける工程（Ｓ４０）を実施する。このようにして図１に示す超電導コイル体１０を得ることができる。 At this time, the bolt 31 is also tightened with respect to the connection member 50 that connects the alignment member 1a and the first flange member 3a. As a result, the alignment member 1a moves to the inner peripheral end face side of the coil element 2 as shown by an arrow 36 in FIG. In this way, all the alignment members 1a to 1c, the first flange member 3a, and the second flange member 3b are fixed. Moreover, the surface of all the alignment members 1a-1c presses the inner peripheral end surface 2a of the coil element 2 as shown in FIG. As a result, the laminated coil elements 2 are aligned along the surfaces of the alignment members 1a to 1c in the stacking direction. Then, the process (S40) which tightens a superconducting coil element in a lamination direction by installing the some axial direction fixing member 4 so that the 1st flange member 3a and the 2nd flange member 3b may be connected is implemented. Thus, the superconducting coil body 10 shown in FIG. 1 can be obtained.
＜作用効果＞
上述した超電導コイル体１０では、複数の整列部材１ａ〜１ｃが複数のコイル要素２を積層方向と交差する方向である径方向から押圧することで、各コイル要素２において複数の整列部材１ａ〜１ｃと接触する部分について、径方向での配置を揃えることができる。この結果、径方向において複数のコイル要素２の位置が揃い、結果的に中心軸２０に沿った方向から見て複数のコイル要素２の位置がそろった状態、つまり中心軸２０に沿った方向において複数のコイル要素２が整列した状態を実現できる。したがって、中心軸２０に沿った方向において整列した複数のコイル要素２により均一性の高い磁場を形成できる。
<Effect>
In the superconducting coil body 10 described above, the plurality of alignment members 1a to 1c press the plurality of coil elements 2 from the radial direction that intersects the stacking direction, whereby the plurality of alignment members 1a to 1c in each coil element 2 are pressed. As for the portion that comes into contact, the arrangement in the radial direction can be made uniform. As a result, the positions of the plurality of coil elements 2 are aligned in the radial direction, and as a result, the positions of the plurality of coil elements 2 are aligned when viewed from the direction along the central axis 20, that is, in the direction along the central axis 20. A state in which a plurality of coil elements 2 are aligned can be realized. Therefore, a highly uniform magnetic field can be formed by the plurality of coil elements 2 aligned in the direction along the central axis 20.
また、図１に示した超電導コイル体１０では、図６〜図８に示したように、複数の整列部材１ａ〜１ｃの形状および配置と、当該複数の整列部材１ａ〜１ｃがコイル要素２を押圧する押圧力とによりコイル要素２の配置を決定している。そのため、たとえばコイル要素２の開口部に挿通される円筒状の整列部材を用いる場合より、整列部材１ａ〜１ｃの形状について求められる加工精度は相対的に低い。したがって、超電導コイル体１０の製造コストの増大を抑制できる。 Further, in the superconducting coil body 10 shown in FIG. 1, as shown in FIGS. 6 to 8, the shape and arrangement of the plurality of alignment members 1 a to 1 c and the plurality of alignment members 1 a to 1 c form the coil element 2. The arrangement of the coil element 2 is determined by the pressing force to be pressed. Therefore, for example, the processing accuracy required for the shapes of the alignment members 1a to 1c is relatively lower than when a cylindrical alignment member inserted through the opening of the coil element 2 is used. Therefore, an increase in the manufacturing cost of the superconducting coil body 10 can be suppressed.
また、上記超電導コイル体１０は、複数の整列部材１ａ〜１ｃと第１フランジ部材３ａおよび第２フランジ部材３ｂとを接続し、弾性部材としての皿バネ３３を含む接続部材５０を備えている。皿バネ３３は、複数の整列部材１ａ〜１ｃを第１フランジ部材３ａまたは第２フランジ部材３ｂに向けて付勢している。このため、超電導コイル体１０を運転するために冷却したときに、超電導コイルの熱収縮量と第１および第２フランジ部材３ａ、３ｂの熱収縮量と複数の整列部材１ａ〜１ｃの熱収縮量とが異なっていても、上記皿バネ３３により複数の整列部材１ａ〜１ｃを第１および第２フランジ部材３ａ、３ｂに向けて押圧した状態を維持できる。したがって、整列部材１ａ〜１ｃと第１および第２フランジ部材３ａ、３ｂとの接続状態を維持し、結果的に整列部材１ａ〜１ｃにより複数のコイル要素２が整列された状態を維持できる。なお、上記皿バネ３３を含む接続部材５０を、たとえば整列部材１ａと第１および第２フランジ部材３ａ、３ｂとの接続部のみに配置し、他の接続部材５０については皿バネ３３を含まない構成としてもよい。この場合、コイル要素２を整列する作業をより容易に行うことができる。 The superconducting coil body 10 includes a connection member 50 that connects the plurality of alignment members 1a to 1c, the first flange member 3a, and the second flange member 3b, and includes a disc spring 33 as an elastic member. The disc spring 33 urges the plurality of alignment members 1a to 1c toward the first flange member 3a or the second flange member 3b. For this reason, when the superconducting coil body 10 is cooled to operate, the amount of heat shrinkage of the superconducting coil, the amount of heat shrinkage of the first and second flange members 3a and 3b, and the amount of heat shrinkage of the plurality of alignment members 1a to 1c. Even if they are different from each other, it is possible to maintain a state in which the plurality of alignment members 1a to 1c are pressed toward the first and second flange members 3a and 3b by the disc spring 33. Therefore, the connection state between the alignment members 1a to 1c and the first and second flange members 3a and 3b can be maintained, and as a result, a state in which the plurality of coil elements 2 are aligned by the alignment members 1a to 1c can be maintained. The connecting member 50 including the disc spring 33 is disposed only at the connecting portion between the alignment member 1a and the first and second flange members 3a and 3b, for example, and the other connecting member 50 does not include the disc spring 33. It is good also as a structure. In this case, the operation of aligning the coil elements 2 can be performed more easily.
また、上記超電導コイル体１０では、複数の整列部材１ａ〜１ｃが超電導コイル４０の内周側に配置されているので、複数のコイル要素２の内周端面２ａの位置を整列部材１ａ〜１ｃにより揃えることができる。 Further, in the superconducting coil body 10, since the plurality of alignment members 1a to 1c are arranged on the inner peripheral side of the superconducting coil 40, the positions of the inner peripheral end faces 2a of the plurality of coil elements 2 are adjusted by the alignment members 1a to 1c. Can be aligned.
（実施の形態２）
＜超電導コイル集合体の構成＞
図９は、実施の形態２に係る超電導コイル集合体の斜視模式図である。図９に示す超電導コイル集合体１００は、複数の超電導コイル体１０ａ〜１０ｃを積層して構成されている。具体的には、超電導コイル集合体１００は、積層配置された３つの超電導コイル体１０ａ〜１０ｃと、コイル体整列部材１０１とを備える。図９では、３つのコイル体整列部材１０１ａ〜１０１ｃが配置されている。なお、コイル体整列部材１０１ａ〜１０１ｃの数は、２でもよいが、３以上であることが好ましく、たとえば４でも５でもよい。
(Embodiment 2)
<Configuration of superconducting coil assembly>
FIG. 9 is a schematic perspective view of the superconducting coil assembly according to the second embodiment. A superconducting coil assembly 100 shown in FIG. 9 is formed by laminating a plurality of superconducting coil bodies 10a to 10c. Specifically, the superconducting coil assembly 100 includes three superconducting coil bodies 10a to 10c arranged in a stacked manner, and a coil body alignment member 101. In FIG. 9, three coil body alignment members 101a to 101c are arranged. The number of coil body alignment members 101a to 101c may be two, but is preferably three or more, for example, four or five.
上記超電導コイル体１０ａ〜１０ｃは、上述した実施の形態１に係る超電導コイル体である。超電導コイル体１０ａ上に超電導コイル体１０ｂが積層されている。超電導コイル体１０ｂ上に超電導コイル体１０ｃが積層されている。複数の超電導コイル体１０ａ〜１０ｃは、中心軸２０（図１参照）が互いに重なるように積層されている。 The superconducting coil bodies 10a to 10c are the superconducting coil bodies according to the first embodiment described above. Superconducting coil body 10b is laminated on superconducting coil body 10a. Superconducting coil body 10c is laminated on superconducting coil body 10b. The plurality of superconducting coil bodies 10a to 10c are stacked such that the central axes 20 (see FIG. 1) overlap each other.
複数の超電導コイル体１０ａ〜１０ｃのそれぞれにおける第１フランジ部材３ａおよび第２フランジ部材３ｂ（図１参照）の内周側には、コイル体整列部材１０１ａ〜１０１ｃを接続するための固定部５が形成されている。コイル体整列部材１０１ａ〜１０１ｃは、一番下の超電導コイル体１０ａの第１フランジ部材３ａから、一番上の超電導コイル体１０ｃの第２フランジ部材３ｂまで到達するように、超電導コイル体１０ａ〜１０ｃの積層方向に沿って延在している。超電導コイル体１０ａの第１フランジ部材３ａおよび超電導コイル体１０ｃの第２フランジ部材３ｂは、それぞれコイル体整列部材１０１ａ〜１０１ｃと接続されている。 A fixing portion 5 for connecting the coil body alignment members 101a to 101c is provided on the inner peripheral side of the first flange member 3a and the second flange member 3b (see FIG. 1) in each of the plurality of superconducting coil bodies 10a to 10c. Is formed. The coil body alignment members 101a to 101c are arranged so as to reach the second flange member 3b of the uppermost superconducting coil body 10c from the first flange member 3a of the lowermost superconducting coil body 10a. It extends along the stacking direction of 10c. The first flange member 3a of the superconducting coil body 10a and the second flange member 3b of the superconducting coil body 10c are connected to the coil body alignment members 101a to 101c, respectively.
なお、各超電導コイル体１０ａ〜１０ｃにおける第１フランジ部材３ａおよび第２フランジ部材３ｂが、それぞれコイル体整列部材１０１ａ〜１０１ｃと接続されてもよい。つまり、コイル体整列部材１０１ａ〜１０１ｃは、各超電導コイル体１０ａ〜１０ｃの第１フランジ部材３ａおよび第２フランジ部材３ｂの固定部５に接続されていてもよい。固定部５における第１フランジ部材３ａまたは第２フランジ部材３ｂとコイル体整列部材１０１ａ〜１０１ｃとの接続部の構成は、基本的に図２に示した第２フランジ部材３ｂと整列部材１ａとの接続部の構成と同様である。このため、複数のコイル体整列部材１０１ａ〜１０１ｃは、複数の超電導コイル体１０ａ〜１０ｃを積層方向と交差する方向から外側に向けて押圧する。この結果、複数のコイル体整列部材１０１ａ〜１０１ｃは、複数の超電導コイル体１０ａ〜１０ｃを積層方向において整列させる。 The first flange member 3a and the second flange member 3b in each of the superconducting coil bodies 10a to 10c may be connected to the coil body alignment members 101a to 101c, respectively. That is, the coil body alignment members 101a to 101c may be connected to the fixing portions 5 of the first flange member 3a and the second flange member 3b of each superconducting coil body 10a to 10c. The configuration of the connecting portion between the first flange member 3a or the second flange member 3b and the coil body alignment members 101a to 101c in the fixing portion 5 is basically the same as that between the second flange member 3b and the alignment member 1a shown in FIG. It is the same as that of the structure of a connection part. For this reason, the plurality of coil body alignment members 101a to 101c press the plurality of superconducting coil bodies 10a to 10c outward from the direction intersecting the stacking direction. As a result, the plurality of coil body alignment members 101a to 101c align the plurality of superconducting coil bodies 10a to 10c in the stacking direction.
＜超電導コイル集合体の製造方法＞
図１０は、図９に示した超電導コイル集合体の製造方法を説明するためのフローチャートである。図１１〜図１４は、図９に示した超電導コイル集合体の製造方法を説明するための模式図である。図１０〜図１４を参照しながら、図９に示した超電導コイル集合体１００の製造方法を説明する。
<Method for producing superconducting coil assembly>
FIG. 10 is a flowchart for explaining a method of manufacturing the superconducting coil assembly shown in FIG. FIGS. 11-14 is a schematic diagram for demonstrating the manufacturing method of the superconducting coil assembly shown in FIG. A method for manufacturing the superconducting coil assembly 100 shown in FIG. 9 will be described with reference to FIGS.
まず、図１０に示すように積層準備工程（Ｓ１１０）を実施する。この工程（Ｓ１１０）では、実施の形態１において説明した超電導コイル体の製造方法により、超電導コイル体１０ａ、１０ｃと、図１２に示す超電導コイル体１０ｂとを準備する。また、コイル体整列部材１０１ａ〜１０１ｃも準備する。図１および図１２から分かるように、超電導コイル体１０ｂの中心軸方向における長さは超電導コイル体１０ａ、１０ｃの当該方向における長さより長くなっている。各超電導コイル体１０ａ〜１０ｃの第１フランジ部材３ａおよび第２フランジ部材３ｂの内周側には、図１２に示すようにコイル体整列部材１０１ａ〜１０１ｃ（図９参照）を固定するための固定部５が形成されている。第１フランジ部材３ａおよび第２フランジ部材３ｂの内周側面において、固定部５と固定部７ａ、７ｂとは周方向において等間隔に配置されている。第１フランジ部材３ａの内周側面では、固定部５と固定部７ａとが周方向において交互に配置されている。同様に、第２フランジ部材３ｂの内周側面では、固定部５と固定部７ｂとが周方向において交互に配置されている。 First, as shown in FIG. 10, a stacking preparation step (S110) is performed. In this step (S110), superconducting coil bodies 10a and 10c and superconducting coil body 10b shown in FIG. 12 are prepared by the method for manufacturing a superconducting coil body described in the first embodiment. In addition, coil body alignment members 101a to 101c are also prepared. As can be seen from FIGS. 1 and 12, the length of the superconducting coil body 10b in the central axis direction is longer than the length of the superconducting coil bodies 10a and 10c in that direction. Fixing for fixing coil body alignment members 101a to 101c (see FIG. 9) on the inner peripheral side of the first flange member 3a and the second flange member 3b of each superconducting coil body 10a to 10c, as shown in FIG. Part 5 is formed. On the inner peripheral side surfaces of the first flange member 3a and the second flange member 3b, the fixed portion 5 and the fixed portions 7a and 7b are arranged at equal intervals in the circumferential direction. On the inner peripheral side surface of the first flange member 3a, the fixing portions 5 and the fixing portions 7a are alternately arranged in the circumferential direction. Similarly, the fixed portions 5 and the fixed portions 7b are alternately arranged in the circumferential direction on the inner peripheral side surface of the second flange member 3b.
そして、図１１に示すように、超電導コイル体１０ａの第１フランジ部材３ａの固定部５に、複数のコイル体整列部材１０１ａ〜１０１ｃの下端部を接続する。なお、このとき超電導コイル体１０ａの第２フランジ部材３ｂの固定部５にも、複数のコイル体整列部材１０１ａ〜１０１ｃを接続してもよい。 And as shown in FIG. 11, the lower end part of several coil body alignment member 101a-101c is connected to the fixing | fixed part 5 of the 1st flange member 3a of the superconducting coil body 10a. At this time, a plurality of coil body alignment members 101a to 101c may also be connected to the fixing portion 5 of the second flange member 3b of the superconducting coil body 10a.
このとき、コイル体整列部材１０１ａ〜１０１ｃは、超電導コイル体１０ａの第１フランジ部材３ａの３つの固定部５にそれぞれ図２に示す接続部材５０により固定される。また、２つのコイル体整列部材１０１ｂ、１０１ｃにおける接続部材５０でのボルト３１（図２参照）の締め代より、コイル体整列部材１０１ａにおける接続部材５０でのボルト３１の締め代を多く残しておく。コイル体整列部材１０１ａ〜１０１ｃは、固定部５と接触する表面の形状を正確に加工しておくことが好ましい。また、第１フランジ部材３ａは表面（超電導コイル体１０ａ〜１０ｃの積層方向から見た表面）の形状を正確に加工しておくことが好ましい。このようにして、コイル体整列部材１０１ａ〜１０１ｃの延在方向が超電導コイル体１０ａの第１フランジ部材３ａの上記表面に対して９０°の角度となるようにすることが好ましい。 At this time, the coil body alignment members 101a to 101c are fixed to the three fixing portions 5 of the first flange member 3a of the superconducting coil body 10a by connection members 50 shown in FIG. In addition, the tightening margin of the bolt 31 at the connection member 50 in the coil body alignment member 101a remains more than the tightening margin of the bolt 31 (see FIG. 2) at the connection member 50 in the two coil body alignment members 101b and 101c. . It is preferable that the coil body alignment members 101a to 101c are accurately processed in shape of the surface in contact with the fixed portion 5. Moreover, it is preferable that the shape of the surface (surface seen from the lamination direction of the superconducting coil bodies 10a to 10c) of the first flange member 3a is accurately processed. In this way, it is preferable that the extending direction of the coil body alignment members 101a to 101c is at an angle of 90 ° with respect to the surface of the first flange member 3a of the superconducting coil body 10a.
次に、図１０の超電導コイル体を積層する工程（Ｓ１２０）を実施する。この工程（Ｓ１２０）では、図１３および図１４に示すように、超電導コイル体１０ａ上に複数の超電導コイル体１０ｂ、１０ｃを積層する。このとき、超電導コイル体１０ｂ、１０ｃの内周側面にコイル体整列部材１０１ａ〜１０１ｃが面するように、各超電導コイル体１０ｂ、１０ｃの開口部にコイル体整列部材１０１ａ〜１０１ｃが挿入された状態とする。また、各超電導コイル体１０ｂ、１０ｃの第１フランジ部材３ａおよび第２フランジ部材３ｂの固定部５が、コイル体整列部材１０１ａ〜１０１ｃに面するように、超電導コイル体１０ｂ、１０ｃは配置される。 Next, a step (S120) of stacking the superconducting coil bodies of FIG. 10 is performed. In this step (S120), as shown in FIGS. 13 and 14, a plurality of superconducting coil bodies 10b and 10c are stacked on superconducting coil body 10a. At this time, the coil body alignment members 101a to 101c are inserted into the openings of the superconducting coil bodies 10b and 10c so that the coil body alignment members 101a to 101c face the inner peripheral side surfaces of the superconducting coil bodies 10b and 10c. And Further, the superconducting coil bodies 10b and 10c are arranged so that the fixing portions 5 of the first flange member 3a and the second flange member 3b of the superconducting coil bodies 10b and 10c face the coil body alignment members 101a to 101c. .
ここで、上記工程（Ｓ１１０）では、コイル体整列部材１０１ａについて超電導コイル体１０ａの第１フランジ部材３ａに対する接続部材５０でのボルト３１の締め代を相対的に多く残している。そのため、コイル体整列部材１０１ａは他のコイル体整列部材１０１ｂ、１０１ｃよりも内周側に位置している。そのため、超電導コイル体１０ｂ、１０ｃを積層する作業においてこれらの超電導コイル体１０ｂ、１０ｃとコイル体整列部材１０１ａとの干渉が起きず、当該作業を容易に実施できる。 Here, in the step (S110), a relatively large margin for tightening the bolt 31 at the connection member 50 with respect to the first flange member 3a of the superconducting coil body 10a is left in the coil body alignment member 101a. Therefore, the coil body alignment member 101a is located on the inner peripheral side with respect to the other coil body alignment members 101b and 101c. Therefore, in the operation of stacking the superconducting coil bodies 10b and 10c, the superconducting coil bodies 10b and 10c and the coil body alignment member 101a do not interfere with each other, and the operation can be easily performed.
次に、コイル体整列部材を締め付ける工程（Ｓ１３０）を実施する。この工程（Ｓ１３０）では、複数のコイル体整列部材１０１ａ〜１０１ｃを超電導コイル体１０ｃにおける第２フランジ部材３ｂの固定部５に接続部材５０（図２参照）を用いて固定する。この時の固定方法は、基本的に図３の工程（Ｓ３０）における整列部材１ａ〜１ｃを第２フランジ部材３ｂに固定する方法と同様である。 Next, a step (S130) of tightening the coil body alignment member is performed. In this step (S130), the plurality of coil body alignment members 101a to 101c are fixed to the fixing portion 5 of the second flange member 3b in the superconducting coil body 10c using the connection member 50 (see FIG. 2). The fixing method at this time is basically the same as the method of fixing the alignment members 1a to 1c to the second flange member 3b in the step (S30) of FIG.
このとき、コイル体整列部材１０１ａと超電導コイル体１０ａにおける第１フランジ部材３ａとを接続する接続部材５０についても、ボルトを増し締めする。この結果、コイル体整列部材１０１ａが各超電導コイル体１０ａ〜１０ｃにおけるコイル要素２（図１参照）の内周端面側に移動する。このようにして、全てのコイル体整列部材１０１ａ〜１０１ｃと、超電導コイル体１０ａの第１フランジ部材３ａおよび超電導コイル体１０ｃの第２フランジ部材３ｂとが固定される。また、全てのコイル体整列部材１０１ａ〜１０１ｃの表面が各超電導コイル体１０ａ〜１０ｃにおけるコイル要素２（図２参照）の内周端面２ａ（図２参照）を押圧する。この結果、積層された超電導コイル体１０ａ〜１０ｃが積層方向においてコイル体整列部材１０１ａ〜１０１ｃの表面に沿って整列する。その後、各超電導コイル体１０ａ〜１０ｃ間において隣接する第１フランジ部材３ａと第２フランジ部材３ｂとをボルトなどの固定部材により固定する。さらに、コイル体整列部材１０１ａ〜１０１ｃの少なくともいずれかを、超電導コイル体１０ａ〜１０ｂの第１フランジ部材３ａおよび第２フランジ部材３ｂのすべてとボルトとナットなどの固定部材により固定してもよい。このようにして図９に示す超電導コイル集合体１００を得ることができる。 At this time, the bolts are also tightened for the connection member 50 that connects the coil body alignment member 101a and the first flange member 3a in the superconducting coil body 10a. As a result, the coil body alignment member 101a moves to the inner peripheral end face side of the coil element 2 (see FIG. 1) in each of the superconducting coil bodies 10a to 10c. In this way, all the coil body alignment members 101a to 101c, the first flange member 3a of the superconducting coil body 10a, and the second flange member 3b of the superconducting coil body 10c are fixed. Moreover, the surface of all the coil body alignment members 101a-101c presses the inner peripheral end surface 2a (refer FIG. 2) of the coil element 2 (refer FIG. 2) in each superconducting coil body 10a-10c. As a result, the stacked superconducting coil bodies 10a to 10c are aligned along the surfaces of the coil body alignment members 101a to 101c in the stacking direction. Thereafter, the first flange member 3a and the second flange member 3b adjacent to each other between the superconducting coil bodies 10a to 10c are fixed by a fixing member such as a bolt. Furthermore, at least one of the coil body alignment members 101a to 101c may be fixed to all of the first flange member 3a and the second flange member 3b of the superconducting coil bodies 10a to 10b and a fixing member such as a bolt and a nut. In this way, the superconducting coil assembly 100 shown in FIG. 9 can be obtained.
なお、上述したコイル体整列部材１０１ａ〜１０１ｃは、個々の超電導コイル体１０ａ〜１０ｃにおける整列部材１ａ〜１ｃより長尺であるため、その剛性を高めるために材質や形状を整列部材１ａ〜１ｃと異なるようにしてもよい。たとえば、コイル体整列部材１０１ａ〜１０１ｃの厚みまたは幅を整列部材１ａ〜１ｃより大きくしてもよい。あるいは、コイル体整列部材１０１ａ〜１０１ｃを構成する材料として、整列部材１ａ〜１ｃを構成する材料よりヤング率の高い材料を用いてもよい。 In addition, since the coil body alignment members 101a to 101c described above are longer than the alignment members 1a to 1c in the individual superconducting coil bodies 10a to 10c, the material and the shape thereof are aligned with the alignment members 1a to 1c in order to increase the rigidity. It may be different. For example, the thickness or width of the coil body alignment members 101a to 101c may be larger than the alignment members 1a to 1c. Or you may use the material whose Young's modulus is higher than the material which comprises the alignment members 1a-1c as a material which comprises the coil body alignment members 101a-101c.
＜作用効果＞
図９に示すような構成の超電導コイル集合体１００では、複数のコイル要素２の配置が揃った複数の超電導コイル体１０ａ〜１０ｃを、コイル体整列部材１０１ａ〜１０１ｃにより径方向の外側に向けて押圧することで、中心軸方向に整列して配置できる。そのため、均一性の高い磁場を形成できる。また、複数の超電導コイル体１０ａ〜１０ｃのうちの一部に不良が発生した場合に、当該不良が発生した超電導コイル体だけを交換する、といった対応が可能になる。
<Effect>
In the superconducting coil assembly 100 configured as shown in FIG. 9, a plurality of superconducting coil bodies 10 a to 10 c in which the arrangement of the plurality of coil elements 2 are arranged are directed outward in the radial direction by the coil body alignment members 101 a to 101 c. By pressing, they can be aligned in the central axis direction. Therefore, a highly uniform magnetic field can be formed. Moreover, when a defect occurs in a part of the plurality of superconducting coil bodies 10a to 10c, it is possible to cope with the problem by replacing only the superconducting coil body in which the defect has occurred.
また、コイル体整列部材１０１ａ〜１０１ｃを、複数の超電導コイル体１０ａ〜１０ｃの積層方向における最端部の部材、すなわち超電導コイル体１０ａの第１フランジ部材３ａおよび超電導コイル体１０ｃの第２フランジ部材３ｂだけではなく、上記積層方向における中間部分において第１フランジ部材３ａまたは第２フランジ部材３ｂに固定してもよい。具体的には、コイル体整列部材１０１ａ〜１０３ｃを、超電導コイル体１０ａの第２フランジ部材３ｂ、超電導コイル体１０ｂの第１フランジ部材３ａおよび第２フランジ部材３ｂ、および超電導コイル体１０ｃの第１フランジ部材３ａの少なくともいずれか１つと固定してもよい。この場合、超電導コイル集合体１００の剛性をより高めることができる。また、このように積層方向の中間部分においてコイル体整列部材１０１ａ〜１０１ｃを固定する場合、積層方向における最端部のみでコイル体整列部材１０１ａ〜１０１ｃを固定する場合より、コイル体整列部材１０１ａ〜１０１ｃの厚みや幅を相対的に小さくできる。 In addition, the coil body alignment members 101a to 101c are the endmost members in the stacking direction of the plurality of superconducting coil bodies 10a to 10c, that is, the first flange member 3a of the superconducting coil body 10a and the second flange member of the superconducting coil body 10c. You may fix to the 1st flange member 3a or the 2nd flange member 3b not only in 3b but in the intermediate part in the said lamination direction. Specifically, the coil body alignment members 101a to 103c are replaced with the second flange member 3b of the superconducting coil body 10a, the first flange member 3a and the second flange member 3b of the superconducting coil body 10b, and the first of the superconducting coil body 10c. You may fix to at least any one of the flange members 3a. In this case, the rigidity of the superconducting coil assembly 100 can be further increased. Further, in the case where the coil body alignment members 101a to 101c are fixed at the intermediate portion in the stacking direction in this way, the coil body alignment members 101a to 101c are fixed as compared with the case where the coil body alignment members 101a to 101c are fixed only at the extreme end in the stacking direction. The thickness and width of 101c can be made relatively small.
（実施の形態３）
＜超電導コイル体の構成＞
図１５は、実施の形態３に係る超電導コイル体の斜視模式図である。図１６は、図１５に示した超電導コイル体の構成を説明するための模式図である。図１５および図１６に示した超電導コイル体１０は、基本的には図１に示した超電導コイル体１０と同様の構成を備えるが、中心軸２０の延在方向が重力方向ではなく、当該重力方向と交差する方向、具体的には水平方向、になっている点が図１に示した超電導コイル体１０と異なっている。また、図１６に示すように、超電導コイル体１０において複数の整列部材１ａ〜１０ｃのうちの１つの整列部材１ａが、矢印３７で示される重力方向の最下部に配置されている。整列部材１ａは第１フランジ部材３ａおよび第２フランジ部材３ｂと、図２に示した接続部材５０により接続されている。接続部材５０は、図１６に示すようにボルト３１ａと、ナット３２ａと、複数の皿バネ３３とを含む。整列部材１ａを第１フランジ部材３ａおよび第２フランジ部材３ｂに接続する接続部材５０のボルト３１ａは、図１６の矢印３７に示す重力方向に沿った方向に延びるよう配置されている。
(Embodiment 3)
<Configuration of superconducting coil body>
FIG. 15 is a schematic perspective view of a superconducting coil body according to the third embodiment. FIG. 16 is a schematic diagram for explaining the configuration of the superconducting coil body shown in FIG. The superconducting coil body 10 shown in FIGS. 15 and 16 basically has the same configuration as the superconducting coil body 10 shown in FIG. 1, but the extending direction of the central axis 20 is not the gravitational direction, and the gravity The superconducting coil body 10 shown in FIG. 1 differs from the superconducting coil body 10 in that the direction intersects the direction, specifically, the horizontal direction. In addition, as shown in FIG. 16, in the superconducting coil body 10, one alignment member 1 a among the plurality of alignment members 1 a to 10 c is disposed at the lowest part in the gravity direction indicated by the arrow 37. The alignment member 1a is connected to the first flange member 3a and the second flange member 3b by the connection member 50 shown in FIG. As shown in FIG. 16, the connecting member 50 includes a bolt 31 a, a nut 32 a, and a plurality of disc springs 33. The bolt 31a of the connection member 50 that connects the alignment member 1a to the first flange member 3a and the second flange member 3b is arranged to extend in the direction along the direction of gravity indicated by the arrow 37 in FIG.
＜作用効果＞
図１５および図１６に示す超電導コイル体１０では、基本的に図１に示した超電導コイル体１０と同様の効果を得ることができる。また、図１５および図１６に示した超電導コイル体１０では、中心軸２０が矢印３７で示す重力方向と交差する方向である水平方向に延びており、さらに弾性部材である皿バネ３３を含む接続部材５０が当該重力方向の最下部に配置されている。そのため、整列部材１ｂ、１ｃに超電導コイル体１０の自重が作用している。つまり、当該接続部材５０には上述した超電導コイル体１０の自重がベース荷重として作用していない。そのため、超電導コイル体１０に対して外部から衝撃が加えられた場合に、当該外部からの衝撃により接続部材５０（より具体的には皿バネ３３）が変形し、超電導コイル体１０の複数のコイル要素２の相対的な位置がずれるといった問題の発生を抑制できる。
<Effect>
The superconducting coil body 10 shown in FIGS. 15 and 16 can basically obtain the same effects as those of the superconducting coil body 10 shown in FIG. Further, in the superconducting coil body 10 shown in FIGS. 15 and 16, the center axis 20 extends in the horizontal direction that intersects the direction of gravity indicated by the arrow 37, and further includes a disc spring 33 that is an elastic member. The member 50 is arrange | positioned at the lowest part of the said gravitational direction. Therefore, the weight of the superconducting coil body 10 acts on the alignment members 1b and 1c. That is, the weight of the superconducting coil body 10 described above does not act as a base load on the connection member 50. Therefore, when an external impact is applied to the superconducting coil body 10, the connection member 50 (more specifically, the disc spring 33) is deformed by the external impact, and the plurality of coils of the superconducting coil body 10 are deformed. Generation | occurrence | production of the problem that the relative position of the element 2 shifts | deviates can be suppressed.
（実施の形態４）
＜超電導コイル体の構成＞
図１７は、実施の形態４に係る超電導コイル体の斜視模式図である。図１７に示す超電導コイル体１０は、基本的には図１に示した超電導コイル体１０と同様の構成を備えるが、整列部材１ａの配置が図１に示した超電導コイル体１０と異なっている。図１７に示した超電導コイル体１０において、図１７に示す整列部材１ａを含む複数の整列部材は、超電導コイル４０の外周側に配置されている。図１７に示した超電導コイル体１０では、超電導コイル４０の外周を囲むように複数の整列部材が配置される。整列部材の数は２以上の任意の数とすることができるが、好ましくは３である。たとえば、複数の整列部材は、超電導コイル４０の外周に沿って、同じ間隔を隔てて配置されていてもよい。複数の整列部材は、図１に示した超電導コイル体１０と同様に第１フランジ部材３ａおよび第２フランジ部材３ｂと接続されている。また、複数の整列部材は、図１７に示す整列部材１ａと同様に、コイル要素２の外周端面２ｂを押圧している。複数の整列部材と第１および第２フランジ部材３ａ、３ｂとの接続部の構成は、基本的に図１に示した超電導コイル体１０における当該接続部の構成と同様である。具体的に、図１７を参照しながら整列部材１ａと第２フランジ部材３ｂとの接続部の構成を説明する。
(Embodiment 4)
<Configuration of superconducting coil body>
FIG. 17 is a schematic perspective view of a superconducting coil body according to the fourth embodiment. The superconducting coil body 10 shown in FIG. 17 basically has the same configuration as the superconducting coil body 10 shown in FIG. 1, but the arrangement of the alignment members 1a is different from that of the superconducting coil body 10 shown in FIG. . In the superconducting coil body 10 shown in FIG. 17, a plurality of alignment members including the alignment member 1 a shown in FIG. 17 are arranged on the outer peripheral side of the superconducting coil 40. In the superconducting coil body 10 shown in FIG. 17, a plurality of alignment members are arranged so as to surround the outer periphery of the superconducting coil 40. The number of alignment members can be any number greater than or equal to 2, but is preferably 3. For example, the plurality of alignment members may be arranged at the same interval along the outer periphery of the superconducting coil 40. The plurality of alignment members are connected to the first flange member 3a and the second flange member 3b in the same manner as the superconducting coil body 10 shown in FIG. Moreover, the some alignment member is pressing the outer peripheral end surface 2b of the coil element 2 similarly to the alignment member 1a shown in FIG. The configuration of the connection portion between the plurality of alignment members and the first and second flange members 3a and 3b is basically the same as the configuration of the connection portion in the superconducting coil body 10 shown in FIG. Specifically, the configuration of the connecting portion between the alignment member 1a and the second flange member 3b will be described with reference to FIG.
図１７に示すように、整列部材１ａは超電導コイル４０の外周に配置されている。接続部材５０のボルト３１は整列部材１ａの外周側から穴３４に通され、第２フランジ部材３ｂの穴３８を介して第２フランジ部材３ｂの外周側から開口部３５にまで到達するように配置されている。第２フランジ部材３ｂでは内周側に開口部３５が形成されている。ナット３２は、第２フランジ部材３ｂの開口部３５内部においてボルト３１の端部に固定される。 As shown in FIG. 17, the alignment member 1 a is disposed on the outer periphery of the superconducting coil 40. The bolt 31 of the connecting member 50 is passed through the hole 34 from the outer peripheral side of the alignment member 1a, and is arranged so as to reach the opening 35 from the outer peripheral side of the second flange member 3b through the hole 38 of the second flange member 3b. Has been. In the second flange member 3b, an opening 35 is formed on the inner peripheral side. The nut 32 is fixed to the end of the bolt 31 inside the opening 35 of the second flange member 3b.
皿バネ３３はボルト３１に取付けられるとともに、ナット３２と開口部３５の内周面（穴３４が開口している内周面）との間に配置されている。ナット３２は皿バネ３３を整列部材１ａ側の方向（径方向での外側方向）に押圧した状態で、ボルト３１に固定される。このため、皿バネ３３が弾性変形することで、ボルト３１および整列部材１ａを第２フランジ部材３ｂ側に引き寄せる力が発生している。 The disc spring 33 is attached to the bolt 31 and is disposed between the nut 32 and the inner peripheral surface of the opening 35 (the inner peripheral surface where the hole 34 is open). The nut 32 is fixed to the bolt 31 in a state in which the disc spring 33 is pressed in the direction toward the alignment member 1a (outward direction in the radial direction). For this reason, the force which draws the volt | bolt 31 and the alignment member 1a to the 2nd flange member 3b side generate | occur | produces because the disc spring 33 elastically deforms.
また、図１７に示すように、第２フランジ部材３ｂと整列部材１ａとの接続部において、整列部材１ａと第２フランジ部材３ｂの固定部７ｂとの間には隙間が形成されている。このようにすれば、整列部材１ａは皿バネ３３により中心軸２０側（第２フランジ部材３ｂ側）に向かうように付勢されているため、結果的に整列部材１ａがコイル要素２の外周端面２ｂを押圧する。 Further, as shown in FIG. 17, a gap is formed between the alignment member 1a and the fixing portion 7b of the second flange member 3b at the connection portion between the second flange member 3b and the alignment member 1a. By doing so, the alignment member 1a is urged toward the central axis 20 side (second flange member 3b side) by the disc spring 33, and as a result, the alignment member 1a becomes the outer peripheral end surface of the coil element 2. 2b is pressed.
＜作用効果＞
図１７に示した超電導コイル体１０では、超電導コイル４０のコイル要素２を外周側から複数の整列部材により押圧することで、図１に示した超電導コイル体１０と同様の効果を得ることができる。つまり、コイル要素２の外周端面２ｂの位置を外周側から整列部材１ａを含む複数の整列部材により揃えることができる。
<Effect>
In the superconducting coil body 10 shown in FIG. 17, the same effect as that of the superconducting coil body 10 shown in FIG. 1 can be obtained by pressing the coil element 2 of the superconducting coil 40 from the outer peripheral side by a plurality of alignment members. . That is, the position of the outer peripheral end surface 2b of the coil element 2 can be aligned from the outer peripheral side by a plurality of alignment members including the alignment member 1a.
また、図１７に示した超電導コイル体１０では、コイル要素２の外周側に複数の整列部材１ａを配置するので、コイル要素２の内径を小さくするような設計が可能である。このため、コイル要素２の外径を相対的に小さくでき、コイル要素２に用いる超電導線材の使用量を削減できる。また、この場合複数のコイル要素２において内径が異なるような構成としてもよい。 Further, in the superconducting coil body 10 shown in FIG. 17, a plurality of alignment members 1 a are arranged on the outer peripheral side of the coil element 2, so that it is possible to design the coil element 2 to have a small inner diameter. For this reason, the outer diameter of the coil element 2 can be made relatively small, and the amount of superconducting wire used for the coil element 2 can be reduced. In this case, the plurality of coil elements 2 may have different inner diameters.
（実施の形態５）
＜超電導機器の構成および作用効果＞
図１８は、実施の形態５に係る超電導機器の模式図である。図１８に示した超電導機器２００は、図１に示した超電導コイル体１０を冷凍機で冷却する冷凍機冷却型の超電導機器である。なお、上記超電導機器２００では、超電導コイル体１０に代えて図９に示したような超電導コイル集合体１００を用いてもよい。
(Embodiment 5)
<Configuration and effects of superconducting equipment>
FIG. 18 is a schematic diagram of a superconducting device according to the fifth embodiment. A superconducting device 200 shown in FIG. 18 is a refrigerator-cooled superconducting device that cools the superconducting coil body 10 shown in FIG. 1 with a refrigerator. In the superconducting device 200, a superconducting coil assembly 100 as shown in FIG. 9 may be used instead of the superconducting coil body 10.
図１８に示した超電導機器２００は、超電導コイル体１０と、断熱容器２１１と、冷凍機２２１と、ホース２２２と、コンプレッサ２２３と、ケーブル２３１と、電源２３２とを主に備える。断熱容器２１１は超電導コイル体１０を収容する。本実施の形態においては、磁場が印加される被検体（図示せず）を収容するための磁場印加領域ＳＣが断熱容器２１１内に設けられている。超電導コイル体１０において図１に示すようにコイル要素２と積層された複数の冷却板６は、冷凍機２２１の冷却ヘッド２２１ａと接続される。冷凍機２２１はコンプレッサ２２３とホース２２２により接続される。冷凍機２２１とコンプレッサ２２３との間にはホース２２２を介して冷媒が循環し、冷凍サイクル回路を構成する。電源２３２は超電導コイル体１０に電流を供給する。 The superconducting device 200 shown in FIG. 18 mainly includes the superconducting coil body 10, a heat insulating container 211, a refrigerator 221, a hose 222, a compressor 223, a cable 231, and a power source 232. The heat insulating container 211 accommodates the superconducting coil body 10. In the present embodiment, a magnetic field application region SC for accommodating a subject (not shown) to which a magnetic field is applied is provided in the heat insulating container 211. As shown in FIG. 1, the plurality of cooling plates 6 laminated with the coil element 2 in the superconducting coil body 10 are connected to the cooling head 221 a of the refrigerator 221. The refrigerator 221 is connected to the compressor 223 and the hose 222. A refrigerant circulates between the refrigerator 221 and the compressor 223 via a hose 222 to constitute a refrigeration cycle circuit. The power source 232 supplies current to the superconducting coil body 10.
この様な超電導機器２００によれば、図１などに示した超電導コイル体１０を用いているため、均一性の高い磁場を発生させて当該磁場を利用することができる。 According to such a superconducting device 200, since the superconducting coil body 10 shown in FIG. 1 or the like is used, it is possible to generate a highly uniform magnetic field and use the magnetic field.
(本実施の形態に係る超電導コイル体の効果に関する検討）
＜比較例に係る超電導コイル体におけるコイル要素の位置ずれの検討＞
比較例としての超電導コイル体の構成として、超電導線材を巻回した内径φ７５０ｍｍのダブルパンケーキコイルを、ガラス繊維強化プラスチック（ＧＦＲＰ）製の円筒状の芯部材に通して積層する構成を考える。この場合、作業性を考慮すると、ダブルパンケーキコイルの内径と芯部材の外径との間のクリアランスは１ｍｍ以上であることが望ましい。また、機械加工における普通公差（中級、４００ｍｍを超え１０００ｍｍ以下)は±０．８ｍｍである。これらの前提に基づき、ダブルパンケーキコイルの内径φを７５１．６ｍｍと仮定する。また、芯部材の外径を７４７．４ｍｍと仮定する。この場合、組立時には、複数のダブルパンケーキコイル間の径方向での位置ずれとして、最大で４．２ｍｍの位置ずれが発生する可能性がある。
(Study on the effect of the superconducting coil body according to the present embodiment)
<Examination of position shift of coil element in superconducting coil body according to comparative example>
As a configuration of a superconducting coil body as a comparative example, a configuration in which a double pancake coil having an inner diameter φ750 mm wound with a superconducting wire is passed through a cylindrical core member made of glass fiber reinforced plastic (GFRP) is considered. In this case, in consideration of workability, the clearance between the inner diameter of the double pancake coil and the outer diameter of the core member is desirably 1 mm or more. Further, the normal tolerance in machining (intermediate, more than 400 mm and 1000 mm or less) is ± 0.8 mm. Based on these assumptions, the inner diameter φ of the double pancake coil is assumed to be 751.6 mm. Further, it is assumed that the outer diameter of the core member is 747.4 mm. In this case, at the time of assembling, there is a possibility that a positional deviation of a maximum of 4.2 mm may occur as a positional deviation in the radial direction between the plurality of double pancake coils.
また、ダブルパンケーキコイルを室温から２０Ｋに冷却した場合の熱収縮率は−０．４６％であり、ＧＦＲＰの積層方向における熱収縮率は−０．７１％である。このため、上述した冷却条件では、ダブルパンケーキコイルについて約３．５ｍｍ、ＧＦＲＰ製の芯部材において約５．３ｍｍの熱収縮が発生する。熱収縮は固定されている部分に向かって起こり、ダブルパンケーキコイルや芯部材の固定方法によっては、上述した冷却時、ダブルパンケーキコイルについて径方向におけるずれが最大約１．８ｍｍとなる可能性がある。 Further, when the double pancake coil is cooled from room temperature to 20 K, the thermal shrinkage rate is -0.46%, and the thermal shrinkage rate in the GFRP lamination direction is -0.71%. For this reason, under the cooling conditions described above, thermal contraction of about 3.5 mm occurs for the double pancake coil and about 5.3 mm for the core member made of GFRP. Heat shrinkage occurs toward the fixed part, and depending on the fixing method of the double pancake coil and the core member, the deviation in the radial direction of the double pancake coil may be about 1.8 mm at the maximum during the cooling described above. There is.
＜本実施の形態に係る超電導コイル体におけるコイル要素の位置ずれの検討＞ たとえば、図１および図２に示した超電導コイル体１０では、複数に分割された芯部材としての整列部材１ａ〜１ｃに、ダブルパンケーキコイルである複数のコイル要素２を通す。その後、接続部材５０のボルト３１（図２参照）により整列部材１ａ〜１ｃを径方向に締め付ける。このようにすれば、上述した比較例における超電導コイル体において必要であった、コイル要素２の内径と整列部材１ａ〜１ｃとの間のクリアランスを無くすことができる。さらに、接続部材５０は皿バネ３３を含むため、コイル要素２と第１および第２フランジ部材３ａ、３ｂと整列部材１ａ〜１ｃとの間の熱収縮率の差に起因する熱収縮量の差を当該皿バネ３３が弾性変形することで吸収できる。したがって、本実施の形態に係る超電導コイル体１０では比較例の超電導コイル体より複数のコイル要素２の間の径方向の位置ずれを抑制できる。 <Examination of Misalignment of Coil Elements in Superconducting Coil Body According to the Present Embodiment> For example, in superconducting coil body 10 shown in FIGS. 1 and 2, alignment members 1a to 1c as core members divided into a plurality of parts are used. The plurality of coil elements 2 which are double pancake coils are passed. Thereafter, the alignment members 1a to 1c are tightened in the radial direction by the bolts 31 (see FIG. 2) of the connection member 50. In this way, the clearance between the inner diameter of the coil element 2 and the alignment members 1a to 1c, which is necessary in the superconducting coil body in the comparative example described above, can be eliminated. Further, since the connecting member 50 includes the disc spring 33, the difference in thermal contraction amount due to the difference in thermal contraction rate between the coil element 2, the first and second flange members 3a and 3b, and the alignment members 1a to 1c. Can be absorbed by the elastic deformation of the disc spring 33. Therefore, in the superconducting coil body 10 according to the present embodiment, radial displacement between the plurality of coil elements 2 can be suppressed as compared with the superconducting coil body of the comparative example.
＜比較例に係る超電導コイル体に関する磁場均一性の評価＞
内径φ７５０ｍｍ、外径φ８４６ｍｍの比較例に係る超電導コイル体について、直径φ２０ｍｍ、中心軸方向の長さ（高さ）２０ｍｍとした空間における磁場均一度を考える。なお、磁場均一度とは、（（軸方向最大磁場強度）−（軸方向最小磁場強度））／（軸方向中心磁場強度）と言う式により定義される。上述した超電導コイル体における磁場均一度の設計値はたとえば１４０１ｐｐｍである。なお、上記比較例に係る超電導コイル体におけるダブルパンケーキコイルの内径と芯部材の外径との間のクリアランスを１ｍｍ、公差を±０．８ｍｍとした。当該超電導コイル体は、６個のダブルパンケーキコイルを積層した構成とした。また、上述した磁場均一性の評価は、空間内の磁場を径方向および軸方向に１ｍｍ以下毎に計算することにより実施した。
<Evaluation of magnetic field uniformity regarding superconducting coil body according to comparative example>
Consider a superconducting coil body according to a comparative example having an inner diameter of 750 mm and an outer diameter of 846 mm, and the magnetic field uniformity in a space having a diameter of 20 mm and a length (height) of 20 mm in the central axis direction. The magnetic field uniformity is defined by an expression of ((axial maximum magnetic field strength) − (axial minimum magnetic field strength)) / (axial central magnetic field strength). The design value of the magnetic field uniformity in the above-described superconducting coil body is, for example, 1401 ppm. The clearance between the inner diameter of the double pancake coil and the outer diameter of the core member in the superconducting coil body according to the comparative example was 1 mm, and the tolerance was ± 0.8 mm. The superconducting coil body has a structure in which six double pancake coils are laminated. The above-described evaluation of the magnetic field uniformity was performed by calculating the magnetic field in the space every 1 mm or less in the radial direction and the axial direction.
上記の前提に基づき、ダブルパンケーキコイルの内径φを７５０ｍｍ、芯部材の外径を７４５．８ｍｍと仮定した。このとき、組立時には、６個のダブルパンケーキコイル中１個が径方向に４．２ｍｍずれた状態を考える。この場合、磁場均一性は１４７３ｐｐｍとなり、６９ｐｐｍポイント悪化する。そして、ダブルパンケーキコイルを室温から２０Ｋまで冷却することにより、ダブルパンケーキコイルの１つがさらに径方向において１．８ｍｍずれた場合を考える。この場合、磁場均一性は１５０４ｐｐｍとなり、さらに３１ｐｐｍポイント悪化する。このような磁場均一性の悪化は、磁場均一性に関する要求が厳しいＭＲＩ、ＮＭＲ、加速器などの用途においては許容されない。 Based on the above assumption, it was assumed that the inner diameter φ of the double pancake coil was 750 mm and the outer diameter of the core member was 745.8 mm. At this time, it is assumed that one of the six double pancake coils is displaced by 4.2 mm in the radial direction during assembly. In this case, the magnetic field uniformity is 1473 ppm, which is 69 points worse. Consider a case where one double pancake coil is further displaced by 1.8 mm in the radial direction by cooling the double pancake coil from room temperature to 20K. In this case, the magnetic field uniformity is 1504 ppm, which is further deteriorated by 31 ppm point. Such deterioration of the magnetic field uniformity is not allowed in applications such as MRI, NMR, and accelerators, where the requirements regarding magnetic field uniformity are severe.
＜本実施の形態に係る超電導コイル体における磁場均一性の評価＞
本実施の形態に係る超電導コイル体の構成として、上述した比較例に係る超電導コイル体と同様に６個のダブルパンケーキコイルを積層した構成を考える。上述のように、本実施の形態に係る超電導コイル体では、コイル要素としてのダブルパンケーキコイルと整列部材との間のクリアランスを無くし、上述した熱収縮率の差に基づくダブルパンケーキコイル間の位置ずれ量を低減できる。そこで、たとえば本実施の形態に係る超電導コイル体において、６個のダブルパンケーキコイルのうち１つの内径が他のダブルパンケーキコイルより１．６ｍｍ大きい場合を考える。この状態での比較例に係る超電導コイル体と同様に磁場均一性を評価すると、当該磁場均一性は１４１７ｐｐｍとなった。この場合、磁場均一性に関する設計値からの悪化の程度は１３ｐｐｍポイントと充分に小さい。
<Evaluation of magnetic field uniformity in superconducting coil body according to the present embodiment>
As a configuration of the superconducting coil body according to the present embodiment, a configuration in which six double pancake coils are stacked similarly to the superconducting coil body according to the comparative example described above is considered. As described above, in the superconducting coil body according to the present embodiment, the clearance between the double pancake coil as the coil element and the alignment member is eliminated, and between the double pancake coils based on the difference in the heat shrinkage rate described above. The amount of displacement can be reduced. Thus, for example, in the superconducting coil body according to the present embodiment, consider a case where one of six double pancake coils has an inner diameter 1.6 mm larger than the other double pancake coils. When the magnetic field uniformity was evaluated in the same manner as the superconducting coil body according to the comparative example in this state, the magnetic field uniformity was 1417 ppm. In this case, the degree of deterioration from the design value regarding the magnetic field uniformity is sufficiently small at 13 ppm point.
今回開示された実施の形態はすべての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は上記した実施の形態ではなく特許請求の範囲によって示され、特許請求の範囲と均等の意味、および範囲内でのすべての変更が含まれることが意図される。 The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above-described embodiments but by the scope of claims, and is intended to include meanings equivalent to the scope of claims and all modifications within the scope.
１，１ａ，１ｂ，１ｃ 整列部材
２ コイル要素
２ａ 内周端面
２ｂ 外周端面
３ａ 第１フランジ部材
３ｂ 第２フランジ部材
４ 軸方向固定部材
５，７ａ，７ｂ 固定部
６ 冷却板
１０，１０ａ，１０ｂ，１０ｃ 超電導コイル体
２０ 中心軸
３１，３１ａ，３１ｂ，３１ｃ ボルト
３２，３２ａ，３２ｂ，３２ｃ ナット
３３ 皿バネ
３４，３８ 穴
３５ 開口部
３６，３７ 矢印
４０ 超電導コイル
５０ 接続部材
１００ 超電導コイル集合体
１０１，１０１ａ，１０１ｂ，１０１ｃ コイル体整列部材
２００ 超電導機器
２１１ 断熱容器
２２１ 冷凍機
２２１ａ 冷却ヘッド
２２２ ホース
２２３ コンプレッサ
２３１ ケーブル
２３２ 電源
1, 1a, 1b, 1c Alignment member 2 Coil element 2a Inner peripheral end surface 2b Outer peripheral end surface 3a First flange member 3b Second flange member 4 Axial fixing members 5, 7a, 7b Fixing portion 6 Cooling plates 10, 10a, 10b, 10c superconducting coil body 20 central shaft 31, 31a, 31b, 31c bolt 32, 32a, 32b, 32c nut 33 disc spring 34, 38 hole 35 opening 36, 37 arrow 40 superconducting coil 50 connecting member 100 superconducting coil assembly 101, 101a, 101b, 101c Coil body alignment member 200 Superconducting device 211 Heat insulation container 221 Refrigerator 221a Cooling head 222 Hose 223 Compressor 231 Cable 232 Power supply
Claims (6)
前記複数のコイル要素の積層方向において、前記超電導コイルの両端部に位置する第１フランジ部材および第２フランジ部材と、
前記第１フランジ部材と前記第２フランジ部材とを接続するとともに、前記超電導コイルを前記積層方向と交差する方向から押圧し、前記複数のコイル要素を前記積層方向において整列させる、複数の整列部材とを備える、超電導コイル体。 A superconducting coil in which a plurality of coil elements wound with a superconducting wire are laminated;
A first flange member and a second flange member located at both ends of the superconducting coil in the stacking direction of the plurality of coil elements;
A plurality of alignment members for connecting the first flange member and the second flange member, pressing the superconducting coil from a direction crossing the stacking direction, and aligning the coil elements in the stacking direction; A superconducting coil body.
前記接続部材は、前記複数の整列部材を前記第１フランジ部材または前記第２フランジ部材に向けて付勢する弾性部材を含む、請求項１に記載の超電導コイル体。 A connection member for connecting the plurality of alignment members to the first flange member and the second flange member;
The superconducting coil body according to claim 1, wherein the connection member includes an elastic member that urges the plurality of alignment members toward the first flange member or the second flange member.
前記複数の超電導コイル体を、前記複数の超電導コイル体の積層方向において整列させる、複数のコイル体整列部材とを備え、
前記超電導コイル体は、請求項１〜４のいずれか１項に記載の超電導コイル体であり、
前記複数のコイル体整列部材は、前記複数の超電導コイル体を前記積層方向と交差する方向から押圧し、前記複数の超電導コイル体を前記積層方向において整列させる、超電導コイル集合体。 A plurality of superconducting coil bodies arranged in layers;
A plurality of coil body alignment members that align the plurality of superconducting coil bodies in the stacking direction of the plurality of superconducting coil bodies;
The superconducting coil body is the superconducting coil body according to any one of claims 1 to 4,
The plurality of coil body alignment members press the plurality of superconducting coil bodies from a direction intersecting the stacking direction, and align the plurality of superconducting coil bodies in the stacking direction.
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