JPH03276775A - Immersion apparatus of superconducting coil - Google Patents
Immersion apparatus of superconducting coilInfo
- Publication number
- JPH03276775A JPH03276775A JP2075480A JP7548090A JPH03276775A JP H03276775 A JPH03276775 A JP H03276775A JP 2075480 A JP2075480 A JP 2075480A JP 7548090 A JP7548090 A JP 7548090A JP H03276775 A JPH03276775 A JP H03276775A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting coil
- liquid
- nitrogen
- dewar
- low temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007654 immersion Methods 0.000 title 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 238000007710 freezing Methods 0.000 claims abstract description 6
- 230000008014 freezing Effects 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005470 impregnation Methods 0.000 claims description 5
- 239000001307 helium Substances 0.000 abstract description 10
- 229910052734 helium Inorganic materials 0.000 abstract description 10
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003822 epoxy resin Substances 0.000 abstract description 5
- 229920000647 polyepoxide Polymers 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 229910000657 niobium-tin Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は超電導コイルの含浸装置に関し、特に、超電導
コイルを固定する装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a superconducting coil impregnation device, and more particularly to a device for fixing a superconducting coil.
（従来の技術）
一般に、超電導コイルに用いられる線材としてＮｂＴ
ｉあるいはＮｂ３ Ｓｎが知られており、この超電導コ
イルは極低温下で運転される。(Prior art) Generally, NbT is used as a wire material for superconducting coils.
i or Nb3Sn is known, and this superconducting coil is operated at extremely low temperatures.
このように、極低温下で運転される超電導コイルに機械
的外力が加わると、摩擦熱が生じてクエンチを引き起こ
す場合がある。In this way, when an external mechanical force is applied to a superconducting coil operated at extremely low temperatures, frictional heat may be generated and cause quenching.
さらに、Ｎｂ３ Ｓｎが線材の場合には機械的外力に極
めて弱い。Furthermore, when Nb3Sn is a wire rod, it is extremely susceptible to external mechanical forces.
従来、上述のクエンチ等を防止するため、一般的に線材
を密に巻くとともに線間にエポキシ樹脂を含浸して超電
導コイルを固定している。Conventionally, in order to prevent the above-mentioned quenching and the like, superconducting coils are generally fixed by tightly winding wires and impregnating the spaces between the wires with epoxy resin.
（発明が解決しようとする課題）
しかしながら、エポキシ樹脂は熱伝導性があまりよくな
いので、超電導コイルを極低温に冷却するのに時間がか
かってしまう。(Problems to be Solved by the Invention) However, since epoxy resin does not have very good thermal conductivity, it takes time to cool the superconducting coil to an extremely low temperature.
例えば、「低温技術」 （東京大学出版会発行）の第５
６頁に示されているようにスタイキャスト］２６６の場
合、低温になるほど熱伝導率が低下し超電導コイルを極
低温に冷却するのに時間がかかってしまう。しかし現状
では他に超電導コイルを固定するのに都合のよい材料が
ない。For example, see Volume 5 of “Cryogenic Technology” (published by the University of Tokyo Press).
As shown on page 6, in the case of [Stycast] 266, the thermal conductivity decreases as the temperature decreases, and it takes time to cool the superconducting coil to an extremely low temperature. However, currently there are no other suitable materials for fixing superconducting coils.
本発明の目的は超電導コイルを短時間で極低温に冷却す
ることができ、しかも超電導コイルにクエンチが生ずる
ことのない含浸装置を提供することにある。An object of the present invention is to provide an impregnating device that can cool a superconducting coil to an extremely low temperature in a short time and does not cause quenching of the superconducting coil.
（課題を解決するための手段）
本発明によれば、超電導コイルが配置されるデユワ−と
、該デユワ−に液状流体を供給する供給手段と、前記液
状流体を前記超電導コイルとともに該流体の凝固点以下
に冷却する冷却手段とを有し、前記液状流体を凝固体に
凝固させて前記超電導コイルを前記凝固体中に含浸させ
るようにしたことを特徴とする超電導コイルの含浸装置
が得られる。この場合、液状流体として液体窒素を用い
ることが望ましい。(Means for Solving the Problems) According to the present invention, a dewar in which a superconducting coil is disposed, a supply means for supplying a liquid fluid to the dewar, and a supply means for supplying the liquid fluid to the superconducting coil together with the freezing point of the fluid. A superconducting coil impregnation device is obtained, characterized in that the superconducting coil has a cooling means for cooling the liquid fluid into a solidified body and the superconducting coil is impregnated into the solidified body. In this case, it is desirable to use liquid nitrogen as the liquid fluid.
（作用）
本発明では、デユワ−中に超電導コイルを配置してデユ
ワ−中に例えば、液体窒素を供給する。(Function) In the present invention, a superconducting coil is arranged in a dewar, and liquid nitrogen, for example, is supplied into the dewar.
そして、例えば、液体ヘリウムを用いて液体窒素を超電
導コイルとともに６３に以下に冷却して液体窒素を凝固
させる。これによって超電導コイルを極低温に冷却する
とともに固定する。このように、超電導コイルを極低温
に冷却するとともに固定している点から短時間で超電導
コイルを極低温まで冷却することができ、クエンチ等が
生ずることもない。Then, for example, liquid nitrogen is cooled together with the superconducting coil to a temperature below 63 using liquid helium to solidify the liquid nitrogen. This cools the superconducting coil to an extremely low temperature and fixes it. In this way, since the superconducting coil is cooled to an extremely low temperature and fixed, the superconducting coil can be cooled to an extremely low temperature in a short time, and quenching and the like do not occur.
（実施例） 以下本発明について実施例によって説明する。(Example) The present invention will be explained below with reference to Examples.
第１図を参照して、クライオスタット１１内には真空に
保たれたシールド容器１２が配置され、さらにシールド
容器１２内には真空に保たれたヘリウム容器１３が配設
されている。ヘリウム容器１３の側壁外面にはフランジ
部１３ａ及び１３ｂが取り付けられており、このフラン
ジ部１３ａ及び１３ｂにはそれぞれ上方に延びる支持棒
１３ｃ及び１３ｄの一端が取り付けられ、これら支持棒
１３ｃ及び１３ｄの他端はシールド容器１２を貫通して
クライオスタット１１の土壁内面に固定されている。こ
れによって、クライオスタット１１にヘリウム容器１３
が支持されている。ヘリウム容器１３に流体流入管１３
ｅが備えられており、この流体流入管１３ｅはクライオ
スタット１１の外に延びている。Referring to FIG. 1, a shield container 12 kept in a vacuum is disposed within a cryostat 11, and a helium container 13 kept in a vacuum is disposed within the shield container 12. Flange portions 13a and 13b are attached to the outer surface of the side wall of the helium container 13, and one ends of support rods 13c and 13d extending upward are attached to the flange portions 13a and 13b, respectively. The end passes through the shield container 12 and is fixed to the inner surface of the earthen wall of the cryostat 11. As a result, the helium container 13 is placed in the cryostat 11.
is supported. Fluid inlet pipe 13 to helium container 13
e is provided, and this fluid inlet pipe 13e extends outside the cryostat 11.
ヘリウム容器１３内には内部が真空断熱された銅製のデ
ユワ−１４が配置され、支持棒１４ａから１４ｄによっ
てヘリウム容器１３に支持されている。そして、デユワ
−１４には、例えばＮｂＴｉ （又はＮ ｂ ３ Ｓ
ｎ ）線キイが巻かれた超電導コイル１５が配置されて
いる。なお、図示のように流体流入管１３ｅの出口はデ
ユワ−１４の上方に位置している。A copper dewar 14 whose interior is vacuum insulated is disposed within the helium container 13, and is supported by the helium container 13 by support rods 14a to 14d. The dewar 14 is made of, for example, NbTi (or Nb3S
n) A superconducting coil 15 around which a wire key is wound is arranged. Note that, as shown in the figure, the outlet of the fluid inflow pipe 13e is located above the dewar 14.
まず、流体流入管１３ｅから液体窒素が所定量流入され
、デユワ−１４内に液体窒素が溜まる。First, a predetermined amount of liquid nitrogen flows in from the fluid inflow pipe 13e, and the liquid nitrogen accumulates in the dewar 14.
そして、この液体窒素によって超電導コイル１５が予冷
される。次に、流体流入管１３ｅから液体ヘリウムが流
入され、これによって、デユワ−１４等が冷却される。Then, the superconducting coil 15 is precooled by this liquid nitrogen. Next, liquid helium flows in from the fluid inflow pipe 13e, thereby cooling the dewar 14 and the like.
デユワ−１４が冷却されて６３に以下、つまり、窒素の
凝固点以下となると液体窒素は凝固して凝固体となる。When the dewar 14 is cooled to a temperature below 63, that is, below the freezing point of nitrogen, the liquid nitrogen solidifies into a solidified body.
これによって超電導コイル１５を構成する線材は固定さ
れる。As a result, the wires constituting the superconducting coil 15 are fixed.
そして、超電導コイル１５はデユワ−１４及び窒素凝固
体を介して極低温、例えば４Ｋまで冷却される。Then, the superconducting coil 15 is cooled to an extremely low temperature, for example 4K, via the dewar 14 and the nitrogen solidified body.
ここで、第２図に窒素の熱伝導率と温度との関係を示す
。第２図に示すように窒素は温度低下するにつれて熱伝
導率が高くなり、温度４Ｋにおいて熱伝導率は５６ ｍ
Ｗ ／ ｃｍ Ｋである。一方、エポキシ樹脂の一種
であるスタイキャスト１２６６の場合温度４にで約１
ｒｎ Ｗ ／ ｃｍ Ｋである。従って、窒素の場合、
温度４Ｋにおける熱伝導率はエポキシ樹脂に比べて５０
倍以上良いことがわかる。Here, FIG. 2 shows the relationship between the thermal conductivity of nitrogen and temperature. As shown in Figure 2, the thermal conductivity of nitrogen increases as the temperature decreases, and at a temperature of 4K, the thermal conductivity is 56 m
W/cmK. On the other hand, in the case of Stycast 1266, which is a type of epoxy resin, at a temperature of 4.
rn W/cm K. Therefore, for nitrogen,
Thermal conductivity at a temperature of 4K is 50% higher than that of epoxy resin.
It turns out it's more than twice as good.
（発明の効果）
以上説明したように本発明では、熱伝導率の良好な液状
流体で超電導コイルを浸し、超電導コイルとともに液状
流体を凝固点以下に冷却しているから、超電導コイルを
凝固体で固定することができるとともに短時間で超電導
コイルを極低温に冷却できる。従って、クエンチを防止
することができるばかりでなく超電導コイルの冷却効率
を極めて良くすることができる。(Effects of the Invention) As explained above, in the present invention, the superconducting coil is immersed in a liquid fluid with good thermal conductivity, and the liquid fluid is cooled together with the superconducting coil to below the freezing point, so the superconducting coil is fixed with the solidified body. The superconducting coil can be cooled down to extremely low temperatures in a short time. Therefore, not only can quenching be prevented, but also the cooling efficiency of the superconducting coil can be extremely improved.
第１図は本発明による超電導コイルの含浸装置の一実施
例を示す断面図、第２図は窒素の温度と熱伝導率との関
係を示す図である。
１１・・・クライオスタット、１２・・・シールド容器
、１３・・・ヘリウム容器、１４・・・デユワ−１も・
・・超電導コイル。
＼
す
温度（に）
４
２図
熱伝導率（ｍＷ／Ｃｍに）
６FIG. 1 is a sectional view showing an embodiment of a superconducting coil impregnation apparatus according to the present invention, and FIG. 2 is a diagram showing the relationship between nitrogen temperature and thermal conductivity. 11... Cryostat, 12... Shield container, 13... Helium container, 14... Dewar-1 also...
...Superconducting coil. ＼ Temperature (in) 4 Figure 2 Thermal conductivity (in mW/Cm) 6
Claims (1)
に液状流体を供給する供給手段と、前記液状流体を前記
超電導コイルとともに該流体の凝固点以下に冷却する冷
却手段とを有し、前記液状流体を凝固体に凝固させて前
記超電導コイルを前記凝固体中に含浸させるようにした
ことを特徴とする超電導コイルの含浸装置。 ２、特許請求の範囲第１項に記載された超電導コイルの
含浸装置において、前記液状流体は液体窒素であること
を特徴とする超電導コイルの含浸装置。[Claims] 1. A dewar in which a superconducting coil is disposed, a supply means for supplying a liquid fluid to the dewar, and a cooling means for cooling the liquid fluid together with the superconducting coil to a temperature below the freezing point of the fluid. A superconducting coil impregnation apparatus characterized in that the liquid fluid is solidified into a solidified body and the superconducting coil is impregnated into the solidified body. 2. The superconducting coil impregnation apparatus as set forth in claim 1, wherein the liquid fluid is liquid nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2075480A JPH03276775A (en) | 1990-03-27 | 1990-03-27 | Immersion apparatus of superconducting coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2075480A JPH03276775A (en) | 1990-03-27 | 1990-03-27 | Immersion apparatus of superconducting coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03276775A true JPH03276775A (en) | 1991-12-06 |
Family
ID=13577499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2075480A Pending JPH03276775A (en) | 1990-03-27 | 1990-03-27 | Immersion apparatus of superconducting coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03276775A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999062127A1 (en) * | 1998-05-22 | 1999-12-02 | Sumitomo Electric Industries, Ltd. | Method and device for cooling superconductor |
-
1990
- 1990-03-27 JP JP2075480A patent/JPH03276775A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999062127A1 (en) * | 1998-05-22 | 1999-12-02 | Sumitomo Electric Industries, Ltd. | Method and device for cooling superconductor |
| US6354087B1 (en) | 1998-05-22 | 2002-03-12 | Sumitomo Electric Industries, Ltd | Method and apparatus for cooling superconductor |
| AU746563B2 (en) * | 1998-05-22 | 2002-05-02 | Sumitomo Electric Industries, Ltd. | Method and device for cooling superconductor |
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