JPS5961010A - Superconductive magnet - Google Patents

Abstract

PURPOSE:To reduce manufacturing steps in process of coil winding as well as to prevent dropping of insulating spacer by winding a tape-shaped insulator having a hole which allows cooling medium to pass as an insulating spacer together with a superconductive material. CONSTITUTION:A superconductive material 1 and an insulating spacer for insulating said material 1 are wound to be constructed. At this time, a tape-shaped insulator having hole 6 which allow cooling medium to pass is wound together with the superconductive material 1. Then a size of the hole 6 and distance of the holes are adjusted in processing the hole 6 so that stress caused by cooling of the superconductive material 1 and electromagnetic force thereof can be optimized.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to improvements in superconducting magnets.

[Technical background of the invention]

In general, superconducting magnets are small and are wound in a pancake shape in order to withstand large electromagnetic forces, and in order to increase the number of turns, multiple cake-shaped coils are connected and each end is connected to create one. Make it a coil. Then, this coil is housed in a container and immersed in liquid helium at minus 269° C. and atmospheric pressure to enter the B sleep induction state. Each pancake-shaped coil is provided with an insulating spacer 2' for electrical insulation, cooling +ti of the conductor by liquid helium as a cooling medium, and fixation of the superconducting body.

FIG. 1 is a longitudinal cross-sectional view showing an example of a conventional superconducting magnet, and FIG. 2 is a cross-sectional view taken along line A--A in FIG. 1. In Figures 1 and 2, 1 is greater than
The quasi-conductors 2 and 3 are insulating spacers that insulate the superconducting conductor 1.

These insulating spacers 2 and 3 are used to electrically insulate the superconducting conductor 1, fill the space 1) φ created by this with liquid helium to cool the superconducting conductor 1, secure a flow path for the liquid helium, and It has the role of receiving and fixing the electromagnetic force generated by the

Then, the insulating bases f2 and 3 are placed at appropriate intervals during coil winding. Fix it to the conductor with a 9-glue or 100% adhesive, etc., and then attach it to the coil.

[During background technology! -4 points] Naturally, when performing coil winding processing in this way, a large number of insulating su-, -fz, and
The tube has to be fixed with a screw, which increases the number of manufacturing steps. -!
! In addition, mechanical stress caused by electromagnetic force, thermal cycles, and aging may cause the insulating substrate f2,3 to become N conductive.
! J1″ peeled off from conductor 1 and fell off, resulting in poor coil insulation
It is a cause of il.

[Purpose of the invention]

The present invention was designed to solve the above-mentioned problems, and its purpose is to reduce the number of manufacturing steps during coil winding, prevent the insulating spacer from falling off, and reduce the stress applied to the conductor. The objective is to provide superconducting magnets that are of high quality.

[Key points of invention]

In order to achieve the above object, the present invention uses a cooling medium to
I3i 'I'J Is it possible to use a tape-shaped insulator with a functional hole as an insulating spacer? ii;i7'7'j'f
It is characterized by being wrapped around the body.

[Embodiments of the invention]

An embodiment of the present invention shown in the drawings will be described below.

Figure 283 (,,) (b) is a schematic configuration diagram of an insulating spacer according to the present invention. In the figure, reference numeral 4 denotes a tape-shaped insulator with a circular hole formed therein, which is cut along the line B-B. 5 is the tape-shaped insulator 4 B-Bl! This is an insulating spacer made by cutting one line along 4, and assembling it by inserting it. This insulating space 95 has 1f of liquid to lium flow.
There is a hole 6 for the j and a part 7 for the sub f wheel. This A1 conductive magnet is constructed by winding the insulating spacer 5 together with the four superconducting bodies 1.

Next, the operation of this configuration will be explained using FIG. 4. The insulating space f5 is continuous and has a tape shape, and is wound together with the electromotive member 1 during coil winding to insulate the Ni electrical conductor 1. Also, insulating spacer 51': hole 6 in the center.
This hole 6 is completely passed through 2 and the liquid is heated.
'f becomes super 1't\, jj'f + heart body 1 becomes cold body 1. In the figure, an arrow 8 indicates a flow n of liquid helium l. The electromagnetic force of the superconducting conductor 1 is received by the insulating space f 5 (7) fish-shaped portion 7, which fixes the superconducting body 1.

The stress t due to the cooling of the superelectric body 1 and the electromagnetic force is determined by the hole 6 and the claw portion of the insulation sweep f5.

Therefore, by adjusting the size of the hole and the interval between the holes when forming the hole 6 in the insulating space f5, it is possible to optimize the cooling of the superconducting conductor 1 and the stress caused by the electromagnetic force. Furthermore, since the insulating spacer 4J-5 is integral in its entire length, there is no possibility that it will partially fall off, unlike the insulating spacer 3.

As described above, the following effects can be obtained with the superconducting magnet having this configuration.

(2) Insulating base f cherry during coil winding process! By omitting the N work and reducing the number of manufacturing steps, it is possible to make the Super 44 magnet more economical.

(b) The conductor 1 can be effectively cooled with liquid helium.

(c) Size 2 of hole 6 of insulation S-95
Due to the spacing, the cooling of the four bodies and the stress caused by the I East electromagnetic force! It can be made into a different version.

(d) The insulating space f5 can be prevented from falling off, and the S conductive magnet will not suffer from poor insulation or damage.

In addition, in the above, the insulating spacer is not limited to fL, for example, as shown in FIG. Insulating spacer 10 constructed by cutting 1 piece and fitting 2″L pieces together.
You can also use it as By using 10 of these subedes, the liquid helium passage can be enlarged by machining rectangular groove holes, and the cooling effect of the superconducting conductor I can be further enhanced.

The same effect can be obtained by machining the shape of the hole into an elliptical or polygonal shape.

〔Effect of the invention〕

As explained above, according to the present invention, a tape-shaped insulator is wound together with the superconducting conductor as an insulating switch so that the holes through which the cooling medium can flow are formed. It is possible to provide a superconducting magnet that can reduce the number of manufacturing units, prevent insulating spacers from falling off, and reduce stress applied to conductors.

[Brief explanation of the drawing]

Figure 1 shows an example of a conventional superconducting magnet.
8) (b) and FIG. 4 are schematic external views of an insulating spacer showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Superconducting conductor, 2, 3, 5, 10... Insulating cover, 4, 9... Insulator, 6... Hole, 7...
・Overlapping part, 8...Flow direction of liquid helium.

Claims (2)

[Claims] (1) A superconductor consisting of a wound conductor and an insulating hardener that insulates the superconductor. ! ? 1. A superconducting magnet, characterized in that a deep insulator having holes through which a cooling medium can flow is wound together with a superconducting conductor as the insulating strip. (2) The insulating spacer is made by cutting a punched insulating spacer at the center of the tape width direction and bending it together. magnet.