【発明の詳細な説明】[Detailed description of the invention]
〔発明の目的〕
（産業上の利用分野）
本発明は、たとえば超電導磁気浮上車（リニアモーター
カー）等に搭載されるレーストラック形の超電導コイル
に関する。
（従来の技術）
現在、従来の交通機関の一つとして開発が進められてい
るリニアモーターカーに使用される超電導磁石は、一般
に超電導コイル部材が収納された容器（内槽）を、真空
容器（外槽）内に断熱支持し、その内槽内を液体ヘリウ
ム等の冷媒で満たし超電導コイルを極低温状態に冷却保
持する構成となっている。
従来、この種の超電導コイルは第５図、第６図に示す様
にレーストラック形状の超電導コイル部材１が液体ヘリ
ウム等の冷媒２に満たされる内槽３内に収納され、かつ
超電導コイルの直線部に発生する電磁力を支えるための
補強部材４が内槽３に溶接などで取付けられている構成
となっている。
また、この超電導コイル部材１は超電導線を巻回した後
、エポキシ樹脂で含浸して形成されるもので、矩形断面
をもつレーストラック形状の前記内槽３の断面中央部に
固定金具５ａ、５ｂにはさみ込まれ、支持固定されてい
る０図示していないが、超電導コイル部材ｌは固定金具
５との間に強化プラスチック（ＦＲＰ）等の絶縁板を介
して内槽３に固定されている。固定金具５には、液体も
しくはガス状の冷媒が流れる流路穴６及び切欠溝７が設
けられ、超電導コイル部材１をいわゆる浸漬冷却できる
構成となっている。
なお、超電導コイル部材１の内槽３への支持固定は、内
槽側板３ａと内槽内周板３ｂとを溶接する時の熱収縮に
より働く内槽側板３ａの引張力を利用して固定金具５を
押付は固定している。
（発明が解決しようとする問題点）
ところで、上記した従来構造のものでは、コイルの軽量
化のために、内槽３の側板３ａを薄くした場合、電磁力
が働いた時に、内槽側板３ａがその溶接収縮量を越える
のびが発生するようになり、固定金具５の超電導コイル
部材１を押付ける力が大幅に低下しうる。すなわち、電
磁力は外周側に向かって働くので、内周側の固定金具５
ｂの押付力が大幅に低下し、その部分での超電導コイル
部材１とのすべり等が発生し易くなり、コイルの超電導
破壊（クエンチ）を誘発する可能性があった。
〔発明の構成〕
（問題点を解決するための手段）
本発明は上記の事情のものになされたもので。
含浸されたコイルを固定金具により内槽内に支持固定す
る超電導コイルにおいて、電磁力が働いた時に内槽容器
がのびを生じても固定金具が弛まず、クエンチの生じに
くい超電導コイルを提供するものである。
このため前記超電導コイルにおいて、内周側の固定金具
をたわみ板状に形成し、内槽取付時に圧縮して組込む構
造とする。
（作用）
上記したたわみ板状の固定金具を内槽取付時に圧縮して
組込むことにより１弾性変形の反力を発生させ、常に超
電導コイル部材を内周側から押付けることができるよう
になり、コイルに電磁力が働いて内槽容器がのびても、
内周側固定金具の超電導コイル部材を押付ける力の低下
が少なくなり。
超電導コイル部材を内槽に安定して固定できる。
（実施例）
本発明の超電導コイルはコイル内周側の固定金具に弾性
変形の反力を持たせる構成としている。
すなわち、第３図の断面図に示すように、内周側固定金
具５ｂをたわみ板状にし、内槽３取付時に圧縮固定する
ことにより、固定金具５ｂに弾性変形の反力を持たせる
構成としている。
上記構造の超電導コイルにおいて、たわみ板状の固定金
具５ｂを内槽３の取、何時に圧縮して組込むことにより
、常に超電導コイル部材１を内周側から押付けることが
可能となり、コイルに電磁力が働き、外周側に内槽３が
のびても、固定金具５ｂの弾性変形の反力により超電導
コイル部材１を押付ける力の低下が少なくなり、超電導
コイル部材１を内槽に安定して固定できる。
上で述べてきたように、コイル内周側の固定金具５ｂを
たわみ板状にし、内槽３取付時に圧縮して組込み１弾性
変形の反力を持たせることにより。
電磁力が働き内槽３がのびた時でも、内周側固定金具５
ｂの超電導コイル部材１を押付ける力の低下が少なくな
り、超電導コイル部材１の固定が安定し、すべり等の発
生を押えることができ、コイルクエンチが生じにくい超
電導コイルを得ることができる。なお、上記効果により
内槽側板３ａを薄板で構成可能なり、超電導コイルを軽
量化できる効果も期待できる。
（他の実施例）
上記で述べた構造に追加ルて、第２図に示すように、た
わみ板状の内周側固定金具５ｂを多段に草ねて（本図例
では２段重ね）弾性変形のバネ定数を小さくするように
構成することにより、よりバネ効果が大きくなり、内槽
３ののびに対して押付力の減少をさらに小さくすること
ができ、より安定して超電導コイル部材１を固定可能な
り、上記と同様の効果が期待できる。
なお、固定金具５ｂの重ね方を第３図、第４図に示すよ
うに、お互いに入り込ませる形状にすれば、固定金具を
小型化でき、上記の効果がより期待できる。[Object of the Invention] (Industrial Application Field) The present invention relates to a racetrack-shaped superconducting coil mounted on, for example, a superconducting magnetically levitated vehicle (maglev train). (Prior art) Superconducting magnets used in linear motor cars, which are currently being developed as one of the conventional means of transportation, generally use a container (inner tank) in which superconducting coil members are housed as a vacuum container ( The structure is such that the superconducting coil is thermally supported in an outer tank) and the inner tank is filled with a coolant such as liquid helium to cool and maintain the superconducting coil at an extremely low temperature. Conventionally, in this type of superconducting coil, a racetrack-shaped superconducting coil member 1 is housed in an inner tank 3 filled with a coolant 2 such as liquid helium, as shown in FIGS. 5 and 6, and the superconducting coil has a straight line. A reinforcing member 4 for supporting the electromagnetic force generated in the inner tank 3 is attached to the inner tank 3 by welding or the like. The superconducting coil member 1 is formed by winding a superconducting wire and then impregnating it with epoxy resin.Fixing metal fittings 5a and 5b are attached to the center section of the racetrack-shaped inner tank 3 having a rectangular cross section. Although not shown, the superconducting coil member 1 is sandwiched between the inner tank 3 and the fixing member 5 and is fixed to the inner tank 3 via an insulating plate made of reinforced plastic (FRP) or the like. The fixing fitting 5 is provided with flow passage holes 6 and cutout grooves 7 through which a liquid or gaseous refrigerant flows, so that the superconducting coil member 1 can be cooled by so-called immersion cooling. The superconducting coil member 1 is supported and fixed to the inner tank 3 by using the tensile force of the inner tank side plate 3a caused by heat contraction when welding the inner tank side plate 3a and the inner tank inner peripheral plate 3b. 5 is fixed. (Problems to be Solved by the Invention) By the way, in the conventional structure described above, when the side plate 3a of the inner tank 3 is made thinner in order to reduce the weight of the coil, when an electromagnetic force is applied, the inner tank side plate 3a As a result, the force of the fixing fitting 5 to press the superconducting coil member 1 may decrease significantly. In other words, since the electromagnetic force acts toward the outer circumference, the fixing metal fitting 5 on the inner circumference side
The pressing force of b was significantly reduced, and slippage with the superconducting coil member 1 at that portion was likely to occur, potentially inducing superconducting breakdown (quenching) of the coil. [Structure of the Invention] (Means for Solving the Problems) The present invention was made in view of the above circumstances. To provide a superconducting coil in which an impregnated coil is supported and fixed in an inner tank by a fixing fitting, in which the fixing fitting does not loosen even if the inner tank container stretches when electromagnetic force is applied, and quenching does not easily occur. It is. For this reason, in the superconducting coil, the fixing metal fitting on the inner peripheral side is formed into a flexible plate shape, and the structure is such that it is compressed and assembled when the inner tank is attached. (Function) By compressing and incorporating the above-mentioned flexible plate-shaped fixing fittings when installing the inner tank, a reaction force of 1 elastic deformation is generated, and the superconducting coil member can always be pressed from the inner circumferential side. Even if the inner tank expands due to electromagnetic force acting on the coil,
The force of pressing the superconducting coil member of the inner circumferential fixing bracket decreases less. The superconducting coil member can be stably fixed to the inner tank. (Example) The superconducting coil of the present invention has a structure in which a fixing metal fitting on the inner peripheral side of the coil has a reaction force of elastic deformation. That is, as shown in the cross-sectional view of FIG. 3, the inner circumferential side fixing fitting 5b is made into a flexible plate shape and is compressed and fixed when the inner tank 3 is attached, so that the fixing fitting 5b is made to have a reaction force of elastic deformation. There is. In the superconducting coil having the above structure, by compressing and assembling the flexible plate-shaped fixing fitting 5b into the inner tank 3, it is possible to always press the superconducting coil member 1 from the inner circumferential side, and the coil is electromagnetic. Even if a force acts and the inner tank 3 extends toward the outer periphery, the reaction force of the elastic deformation of the fixing fittings 5b reduces the reduction in the force pressing the superconducting coil member 1, and the superconducting coil member 1 is stably attached to the inner tank. Can be fixed. As mentioned above, the fixing fitting 5b on the inner circumferential side of the coil is made into a flexible plate shape, and is compressed when the inner tank 3 is attached to provide a reaction force of the elastic deformation of the assembly 1. Even when the inner tank 3 is extended due to electromagnetic force, the inner fixing bracket 5
The decrease in the force pressing the superconducting coil member 1 in b is reduced, the fixing of the superconducting coil member 1 is stabilized, the occurrence of slipping, etc. can be suppressed, and a superconducting coil that is less likely to cause coil quench can be obtained. In addition, due to the above-mentioned effect, the inner tank side plate 3a can be constructed of a thin plate, and the effect of reducing the weight of the superconducting coil can also be expected. (Other Embodiments) In addition to the structure described above, as shown in FIG. By configuring the spring constant for deformation to be small, the spring effect becomes larger, and the reduction in the pressing force against the elongation of the inner tank 3 can be further reduced, and the superconducting coil member 1 can be more stably moved. Since it can be fixed, the same effect as above can be expected. Note that if the fixing metal fittings 5b are stacked so that they fit into each other as shown in FIGS. 3 and 4, the fixing metal fittings can be made smaller and the above effects can be more expected.
【発明の効果】【Effect of the invention】
上で述べてきたように、従来の超電導コイルにおいては
、電磁力が働いた時に薄肉構造の内槽ののびにより、コ
イル内周側の固定金具の押付力が大幅に低下し、その部
分でのすべり等によるコイルクエンチ誘発の恐れがあっ
たが１本発明によれば、内周側の固定金具をたわみ板状
にし、内槽内に圧縮組込み弾性変形の反力を持たせるこ
とにより、電磁力が働き内槽がのびた場合でも、固定金
具の押付力の低下が少なくなり、超電導コイル部材を安
定して固定でき、コイルクエンチの生じにくい超電導コ
イルを得ることが可能となる。また。
上記効果により、内槽側板の薄板化による超電導コイル
の軽量化の効果も期待できる。さらに、内周側固定金具
を多段に重ね構成することにより、バネ効果をより大き
くし内槽ののびに対する押付力の減少をさらに小さくす
ることが可能なり、上記と同様の効果が期待できる。ま
た、固定金具の重ね方を互いに入り込ませる形状とすれ
ば、固定金具を小型化でき、上記の効果がより期待でき
る。As mentioned above, in conventional superconducting coils, when electromagnetic force is applied, the thin-walled inner tank expands, which significantly reduces the pressing force of the fixing fittings on the inner circumference of the coil, causing There was a risk of coil quenching due to slippage, etc. However, according to the present invention, the fixing fitting on the inner circumferential side is made into a flexible plate shape, and the reaction force of the elastic deformation due to compression built-in is provided in the inner tank, thereby eliminating electromagnetic force. Even when the inner tank is extended, the reduction in the pressing force of the fixing fittings is reduced, the superconducting coil member can be stably fixed, and a superconducting coil that is less likely to quench the coil can be obtained. Also. Due to the above effects, it is also possible to expect the effect of reducing the weight of the superconducting coil by making the inner tank side plate thinner. Furthermore, by configuring the inner circumferential side fixing fittings in multiple stages, it is possible to further increase the spring effect and further reduce the reduction in the pressing force due to the expansion of the inner tank, and the same effects as described above can be expected. Moreover, if the fixing metal fittings are stacked so that they fit into each other, the size of the fixing metal fittings can be reduced, and the above-mentioned effects can be further expected.
【図面の簡単な説明】[Brief explanation of the drawing]
第１図は本発明による超電導コイルの断面図。
第２図は本発明の他の実施例を示す超電導コイルの断面
図、第３図、第４図は第２図■−■線における固定金具
断面図、第５図は従来の超電導コイルを一部切欠して示
す概略構成図、第６図は第５図ＶＩ−ＶＩ線における要
部断面図である。
１・・・超電導コイル部材 ２・・・冷媒３ｔ３ａ、
３ｂ・・・内槽 ４・・・補強部材５．５ａ、
５ｂ・・・固定金具 ６・・・流路穴７・・・切欠
溝
代理人 弁理士 則 近 憲 佑
同 三俣弘文
第 １ 図
第２図
第３図
第４図FIG. 1 is a sectional view of a superconducting coil according to the present invention. Fig. 2 is a sectional view of a superconducting coil showing another embodiment of the present invention, Figs. 3 and 4 are sectional views of the fixing metal fittings taken along the line ■-■ in Fig. 2, and Fig. 5 is a cross-sectional view of a conventional superconducting coil. FIG. 6 is a partially cutaway schematic configuration diagram, and FIG. 6 is a cross-sectional view of the main part taken along line VI-VI in FIG. 1... Superconducting coil member 2... Refrigerant 3t3a,
3b...Inner tank 4...Reinforcement member 5.5a,
5b...Fixing metal fittings 6...Flow passage hole 7...Notch groove Agent Patent attorney Nori Chika Ken Yudo Hirofumi Mitsumata No. 1 Figure 2 Figure 3 Figure 4