JPS59141206A - Manufacture of magnet - Google Patents

Abstract

PURPOSE:To strengthen fixation of the superconductor of a magnet, and to make impregnation work after winding work unnecessary by a method wherein the conductor formed with an insulating layer consisting of a fibrous material on the surface is immersed and passed in a thermosetting resin liquid to impregnate the resin liquid, and after winding work is performed in this condition, the impregnated resin liquid is hardened. CONSTITUTION:A conductive wire 12 manufactured by forming an insulating material layer 14 consisting of a fibrous material on the surface of a conductor 13 is led out from a supply drum 11, and is guided being supported by a guide roller 15 to a resin tank 17 filled up with a thermosetting resin liquid 16 proccessed previously with the deaeration process, and after the thermosetting resin liquid 16 is impregnated to the insulating material layer thereat, the conductor is wound into a coil winding on a magnet bobbin 19 equipped to a winder. Then the resin impregnated to the insulating material layer of the winding A wound in a coil winding on the magnet bobbin 19 is hardened in a heating oven to fix to be formed in one body between the conductors and between the conductor and the insulating layer. A tension applying device 18 is interlocked to the supply drum 11 and the magnet bobbin 19, and is controlled as to make the superconductor 12 to hold the prescribed tension.

Description

【発明の詳細な説明】 この発明は核融合装置のマグネットや、磁気浮上式列車
の車載用コイルなどに使用される超電導マグネットの製
造方法に関し、さらに詳しくのべると、繊維状物質から
なる絶縁層を形成した導体を予め脱泡処理した熱硬化性
樹脂液中に浸漬通過させて導体の絶縁層に樹脂液を含浸
させ、その状態で巻線した後、含浸樹脂液を硬化せしめ
て導体間および導体と絶縁層間を固定一体化させること
を特徴とするマグネットの製造方法に関するものである
。[Detailed Description of the Invention] The present invention relates to a method for manufacturing superconducting magnets used in magnets for nuclear fusion devices, coils for magnetic levitation trains, etc. The formed conductor is immersed in a thermosetting resin liquid that has been degassed in advance to impregnate the insulating layer of the conductor with the resin liquid, and after winding in this state, the impregnated resin liquid is hardened and the resin liquid is applied between the conductors and between the conductors. The present invention relates to a method for manufacturing a magnet characterized by fixing and integrating an insulating layer and an insulating layer.

マグネットの安定性は超電導線材自身の安定性と、これ
をコイル巻したコイル自体の安定性とに左右される。The stability of a magnet depends on the stability of the superconducting wire itself and the stability of the coil itself.

超電導線自身の不安定性は、超電導体と電気的熱的良導
体である常電導体との複合化、超電導体の細線化、超電
導体のツイスト化などの技術的進歩によって急速に改善
されつ＼ある。The instability of superconducting wires themselves is being rapidly improved due to technological advances such as the combination of superconductors and normal conductors that are good electrical and thermal conductors, thinning of superconductors, and twisting of superconductors. .

一方超電導体の固定化を目的として、合成樹脂、グリー
ス、ワックス、低融点合金などを含浸した後固化させる
方法が採用されているが、超電導体自身の技術的進歩に
比べて未だ十分なものとけいえず、多くの問題点を有し
ている。On the other hand, for the purpose of immobilizing superconductors, methods have been adopted in which synthetic resins, grease, wax, low melting point alloys, etc. are impregnated and then solidified, but these methods are still insufficient compared to the technological advances in superconductors themselves. However, it has many problems.

例えばコイル巻した超電導線を液状固定剤中に浸漬した
後減圧下で含浸させる方法、超電導線を固定剤中に浸漬
しながらコイル巻きする方法、固定剤を滴下しながらコ
イル巻きする方法などが知られているが、これらの方法
では完全にコイルの間隙に固定剤を含浸できなかったり
、種々の充填剤を均一に分散することができないなどの
問題のほか、熱収縮や樹脂の硬化収縮時により固定剤に
クラックが発生し、このため固定剤だけで超電導線の移
動を阻止することが難しくなるという欠点があった。For example, there are methods in which a coiled superconducting wire is immersed in a liquid fixative and then impregnated under reduced pressure, a method in which a superconducting wire is wound in a coil while being immersed in a fixative, and a method in which a coil is wound while a fixing agent is dropped. However, these methods have problems such as not being able to completely impregnate the fixing agent into the gap between the coils, not being able to uniformly disperse various fillers, and due to heat shrinkage and curing shrinkage of the resin. The problem is that cracks occur in the fixing agent, making it difficult to prevent the superconducting wire from moving using the fixing agent alone.

このため超電導線が電磁力を受けた場合に超電導線の移
動の原因となり、マグネットの特性を劣化させるおそれ
があった。Therefore, when the superconducting wire is subjected to electromagnetic force, it may cause movement of the superconducting wire, which may deteriorate the characteristics of the magnet.

そこで本発明者は超電導マグネットを安定に作動さすに
は、通電時発生する電磁力に対してコイルに巻いた超電
導線相互間を固着し補強して線が動かないように固定し
ておく必要を見出し、その方法として （１）第１図に示すように巻枠１に導体２を繊維状物質
と半硬化状態の熱硬化性樹脂よりなる絶縁材料３を介在
させながらコイル巻きしたのち、絶縁材料を礎化して超
電導線と一体化し固定する方法（２）第２図に示すよう
に導体２の層間に絶縁層としての繊維状物質４を介在さ
せながら巻線したのち、熱硬化性樹脂を真空含浸し、そ
の後硬化し固定する方法 などを掃案した。Therefore, in order for the superconducting magnet to operate stably, the inventors of the present invention discovered that it is necessary to secure and reinforce the superconducting wires wound around the coil to prevent the wires from moving against the electromagnetic force generated when electricity is applied. As shown in Figure 1, the conductor 2 is coiled around a winding frame 1 with an insulating material 3 made of a fibrous material and a semi-hardened thermosetting resin interposed therebetween, and then the insulating material is (2) As shown in Figure 2, the conductor 2 is wound with a fibrous material 4 interposed between the layers as an insulating layer, and then the thermosetting resin is heated in a vacuum. The method of impregnating, then curing and fixing was explored.

しかしながら、（１）の方法はＦＲＰ　（Ｆｉｂｅｒ　
Ｒｅ１ｎ−ｆｏｒｃｅｄ　Ｐｌａｓｔｉｃｓ）と類似し
ていて、ボイドの残存が避けられず、このため固定力が
弱いこと、熱伝導性が劣り内部の導体は冷却されにくい
こと、などの欠点を有し、また（２）の方法では導体を
非常に密着して巻くために、樹脂の含浸パスが容易にと
れないため、どうしても真空引目の部分のみ含浸されや
すく、これより離れた個所は未含浸となシやすいこと、
巻線後別途に樹脂含浸作業を行うため、製造工程が複雑
であること、真空含浸設備を必要とすること、などの欠
点を有していた〇本発明者は上記の点に鑑みて、樹脂含
浸が完全でしかも内部にボイドのないマグネットの製法
についてさらに検討を加えた枯果、この発明に至ったも
のである。However, method (1) uses FRP (Fiber
It is similar to Re1n-forced Plastics), and has disadvantages such as the unavoidable residual voids, weak fixing force, and poor thermal conductivity, making it difficult to cool the internal conductor. In method 2), since the conductor is wound very closely, the impregnation path of the resin cannot be easily taken, so only the vacuum line is likely to be impregnated, and areas further away are likely to be left unimpregnated. thing,
Since resin impregnation work is performed separately after winding, the manufacturing process is complicated and vacuum impregnation equipment is required. This invention was created by further research into a method for producing a magnet that is completely impregnated and has no internal voids.

以下、この発明の方法をその一実施例を示す第３〜５図
に基づいて説明する。Hereinafter, the method of the present invention will be explained based on FIGS. 3 to 5 showing one embodiment thereof.

第３図において、ｌｌはサプライドラムであり、これに
は第４図に示すように導体１３の表面に繊維状物質よシ
なる絶縁材層１４を形成した電導線１２が巻かれている
。In FIG. 3, reference numeral 11 denotes a supply drum, on which, as shown in FIG. 4, a conductive wire 12 having an insulating material layer 14 made of a fibrous material formed on the surface of a conductor 13 is wound.

そしてこの電導線１２はサプライドラム１１から引出さ
れ、ガイドローラ１５に支持されて熱硬化性樹脂液１６
を充填した樹脂槽１７に導かれ、ここで絶縁材層に熱硬
化性樹脂液１６を含浸させたのち巻線機（図示せず）に
装着されているマグネットボビン１９にコイル巻きされ
る。The conductive wire 12 is pulled out from the supply drum 11, supported by a guide roller 15, and is supported by a thermosetting resin liquid 16.
There, the insulating material layer is impregnated with the thermosetting resin liquid 16, and then coiled around a magnet bobbin 19 attached to a winding machine (not shown).

第５図はマグネットボビン１９にコイル巻キサれた巻線
Ａの断面を示したものである。FIG. 5 shows a cross section of the winding A wound around the magnet bobbin 19.

このようにしてコイル巻きされた巻線Ａは、次いで加熱
炉（図示せず）にて絶縁材層に含浸した樹脂を硬化させ
、導体間および導体と絶縁層間を固定一体化してマグネ
ットが得られるのである。The winding A thus wound into a coil is then hardened with the resin impregnated into the insulating material layer in a heating furnace (not shown), and the conductors and the conductor and the insulating layer are fixed and integrated to obtain a magnet. It is.

第３図において、１８は張力印加装置であり、これはサ
プライドラム１１とマグネットボビン１９に連動してい
て樹脂液含浸からマグネットボビン１９への巻取シまで
超電動線１２が常に一定張力内の樹脂液１６の脱泡を行
うものである。In FIG. 3, reference numeral 18 denotes a tension applying device, which is linked to the supply drum 11 and the magnet bobbin 19, so that the superelectric wire 12 is always kept within a constant tension from impregnation with resin liquid to winding onto the magnet bobbin 19. This is for defoaming the resin liquid 16.

この発明において電導線表面に絶縁材層を形成するに使
用する繊維状物質としては、超電導線の層間絶縁層の確
保、固定剤としての熱硬化性樹脂液の含浸経路の確保お
よび熱硬化性樹脂液の熱的、機械的性質の改善が果せる
ものが好ましく、それには多種の有機、無機繊維例えば
ガラス、カーボン、ケプラー゛、ボロン、シリコンカー
バイト、アルミナ、石綿等の長繊維、クロス、短繊維な
どが適当である。In this invention, the fibrous material used to form the insulating material layer on the surface of the conductive wire includes ensuring an interlayer insulating layer of the superconducting wire, ensuring an impregnation path for the thermosetting resin liquid as a fixing agent, and thermosetting resin. It is preferable to use materials that can improve the thermal and mechanical properties of the liquid, including various organic and inorganic fibers such as long fibers, cloth, and short fibers such as glass, carbon, Kepler, boron, silicon carbide, alumina, and asbestos. etc. are appropriate.

また上記の絶縁層に含浸させて導体間および導体と絶縁
層を一体固定化させるに使用する熱硬化性樹脂としては
、エポキシ樹脂、不飽和ポリエステル樹脂、ポリウレタ
ン樹脂、ジアリルフタレート樹脂などが挙げられる。Further, examples of the thermosetting resin used to impregnate the above-mentioned insulating layer to integrally fix the conductors and the conductor and the insulating layer include epoxy resins, unsaturated polyester resins, polyurethane resins, diallyl phthalate resins, and the like.

かくしてこの発明の方法においては、 （１）超電導線表面に被覆した繊維状物質からなる絶縁
層に予め脱泡した熱硬化性樹脂液を含浸させておシ、ま
た樹脂含浸超電導線をマグネットボビンに巻きとる時張
力印加装置にて一定張力をかけることによって樹脂をし
ぼり出す格好となってはツボイドのない、かつ超電導線
間の固定および絶縁層と超電導線との固定も強固なマグ
ネットが得られること。Thus, in the method of the present invention, (1) an insulating layer made of a fibrous material coated on the surface of a superconducting wire is impregnated with a thermosetting resin liquid that has been defoamed in advance, and the resin-impregnated superconducting wire is attached to a magnetic bobbin. By squeezing out the resin by applying a constant tension with a tension applying device when winding it up, it is possible to obtain a magnet that is free from voids and has strong fixation between the superconducting wires and between the insulating layer and the superconducting wire. .

（２）　（１）でのべたようにボイドが殆んどないこと
から熱伝導のすぐれたマグネットが得られること。(2) As mentioned in (1), there are almost no voids, so a magnet with excellent heat conduction can be obtained.

（３）超電導線をマグネットボビンに巻きとる際、既に
脱泡処理した樹脂を含浸させているから巻線後の樹脂含
浸作業が不要であること。(3) When winding the superconducting wire onto a magnet bobbin, it is already impregnated with a defoamed resin, so there is no need for resin impregnation work after winding.

などの効果を有するのである。It has the following effects.

しかしてこの発明の製造法は超電導マグネットに限らず
、常電導マグネットの製造にも有効である０However, the manufacturing method of this invention is effective not only for manufacturing superconducting magnets but also for normal conducting magnets.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来のソレノイド状超電導マグネットのコイル
巻き状態を示す斜視図、第２図は同じく超電導コイルの
断面図、第３図はこの発明のマグネット製造方法を示す
工程図、第４図はこの発明で用いる電導線の断面図、第
５図はこの発明にて樹脂含浸後巻線した電導巻線の断面
図である。 １１・・・サプライドラム　　１２・・・電導線１３・
・・導体　　　　　　　１４・・・絶縁層１６・・・熱
硬化性樹脂液　　１７・・・樹脂槽１８・・・張力印加
装置　　　１９・・・マグネットボビン２０・・・真空
ポンプ　　　　２１・・・真空パイプ特許出願人　　　
　　　　　　住友電気工業株式会社代理人　　　弁理士
和田昭 第１図 第２図 第８図Fig. 1 is a perspective view showing the state of coil winding of a conventional solenoid-shaped superconducting magnet, Fig. 2 is a sectional view of the same superconducting coil, Fig. 3 is a process diagram showing the magnet manufacturing method of the present invention, and Fig. 4 is this FIG. 5 is a sectional view of a conductive wire used in the present invention, which is impregnated with a resin and then wound. 11... Supply drum 12... Conductive wire 13.
...Conductor 14...Insulating layer 16...Thermosetting resin liquid 17...Resin tank 18...Tension applying device 19...Magnet bobbin 20...Vacuum pump 21...Vacuum pipe patent applicant
Sumitomo Electric Industries Co., Ltd. Representative Patent Attorney Akira Wada Figure 1 Figure 2 Figure 8

Claims (3)

【特許請求の範囲】[Claims] （１）予め表面に繊維状物質からなる絶縁層を形成した
導体を、予め脱泡処理を施した熱硬化性樹脂液中に浸漬
通過させて導体表面の絶縁層に前記樹脂液を含浸させ、
その状態で巻線した後含浸樹脂液を硬化せしめて導体間
および導体と絶縁層間を固定一体化させることを特徴と
、するマグネットの製造方法。(1) A conductor on which an insulating layer made of a fibrous substance has been formed on the surface thereof is immersed in a thermosetting resin liquid that has been previously subjected to a defoaming treatment to impregnate the insulating layer on the surface of the conductor with the resin liquid,
A method for manufacturing a magnet, which comprises winding the wire in that state and then hardening the impregnated resin liquid to fix and integrate the conductors and between the conductors and the insulating layer. （２）絶縁層を表面にする導体は一定張力を印加した状
態で樹脂含浸、巻線を行うことを特徴とする特許請求の
範囲第１項記載のマグネットの製造方法。(2) The method for manufacturing a magnet according to claim 1, wherein the conductor having an insulating layer on its surface is impregnated with a resin and wound with a constant tension applied thereto. （３）繊維状物質が有機または無機繊維の少なくとも１
種からなることを特徴とする特許請求の範囲第１項記載
のマグネットの製造方法。(3) The fibrous material is at least one organic or inorganic fiber.
The method for producing a magnet according to claim 1, characterized in that the magnet is made of seeds.