JPS5946704A - Superconductive conductor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a super 1゛B conductor body, in particular a super 1゛B which has different types of conductor wires and is surrounded by gold wires. There were 13 of them.

In recent years, due to the need for energy saving and compactness, +1
)tn '11. 11 devices have been added that use conductive coils to create a dramatic effect. Along with this, superelectric 4 coil k
(Superconducting conductors consisting of W are also required to have r% I astral, high clay density.

These 41 ultra-1uA wires include monolith type, strand embedded type, bundle type, etc., but as for the efficient use of these, different types of superheavy conductive materials are used on the high magnetic field side and the low magnetic field side, and the low magnetic field Cheap superconducting coils are being manufactured (for example, Nb'['i is used on the low magnetic field side and Nb5Sn k is used on the high magnetic field side). Figure 1 shows all of these superconducting conductors. An example of the superconducting coil used is shown below. As shown between the cores, usually superconducting coil 1
The device is immersed in liquid helium 3 filled in a heat insulating container 2 to be in a super-conducting state and then energized. When the superconducting coil 1 is energized, it generates a magnetic field J4Qt.
The magnetic field is high at the inner circumference of the MA'1g conductor coil 1, and is low at the outer circumference.

This superconducting coil 1 is made up of 44 super+Jj bodies.
The body is shown in FIG. 2 and 31Y1. The superconducting conductor shown between the cores is constructed by embedding a super 1J1 conductive wire 5 in a stabilized I4 made of copper with solder 6 and twisting it. Superconducting m5 is N
BIJI i and Nb3Sn were made from Doto and copper in the 1st century.

By the way, in superconducting coils for high magnetic fields, the superconductivity above 21 ri is divided into 4 total sieve magnets, easy 11 j, and a gradient configuration in which the low magnetic field side is rearranged. The reason for this is that the superconducting conductors used in the high magnetic field 41111 are at market prices, and the main objective is to reduce the amount used as much as possible.For this purpose, it is necessary to connect all different types of superconducting conductors. occurs, and per this connected VC,
In the past, different types of super' [IJ, conductor, and ζ conductors were manufactured separately and connected as shown in Figure 6134 and Figure 5 of Shima. That is, what is shown in FIG. 4) 8 glands + t
Soldering is performed on the surfaces of the stabilizing material 4, which has a 100% diameter, to connect the different types of superconducting 4.J1 bodies.

However, in the case of a j　 sequence as shown in Fig. 4, if the stabilization (44 j length) is not taken completely long, the 1 base sea resistance (rt
te becomes a problem. That is, in a superconducting coil, F
A hoop force is generated by the tn fIi force, and the conductor must bear that force, but in the connection shown in Figure 4, a moment is generated due to the difference in the point of application of the force, and bending stress and solder There is a danger that the IL force of the part will become large and it will cut kJ against the powerful force. In addition, in a superconducting coil, this connection part is placed at the winding part, so in the next turn of the connection part, a spacer etc. is required to fit the winding roundly, making winding very troublesome. It had become.

This is not the case, as shown in Figure 5, there are different types of superelectric 4 wires 7 for concave magnetic fields and wires for high magnetic fields! The ends of the conductive wires 8 are wrapped in advance and tied together, and the stabilizing material 4 extending 4 lengths around them is cut diagonally, and the body wire 7.8
The connection is made with silver solder 9 near the connection part.

In this case, the reliability of strength is 177 as shown in Figure 84.
However, the stabilizing material 4 is softened by the +'lt + vice during silver soldering 1-1, so the method of cold working in advance, which is done to increase the strength, is It can no longer be used for historical purposes. In particular, the extraneous super' + [conducting wires 7 and 8 continue. In this case, since the rigidity, elongation O・, and thermal contraction rate of these two superelectric 4IVi17.8 are different, in the following part to be wrapped, if the external stabilizing material 4 is weak, the more rigid superelectric 4 High stress is generated in the superconducting wire, leading to deterioration of superconductivity and damage to the superconducting wire, which is not desirable.
.

The present invention has been made in view of the above points, and its purpose is to prevent strength deterioration of the connected portion even when different types of superconducting wires are connected to form 11 to 11. :
The object of the present invention is to provide an entire superconducting conductor that eliminates deterioration of superconducting properties and damage to M3 conductive wires.

The present invention achieves all of the intended objectives by configuring the stabilizing material that is piled up near the connecting portions of different types of ultra-thin conducting wires to be continuous without any connection.

The present invention will be described in detail based on the embodiments shown in the drawings. The same symbols will be used for all items that are the same as in the past.

FIG. 6 shows an embodiment of the present invention. As in the case of the internuclear space, in this embodiment, before embedding the different types of superconducting wires 7 and 8 with the same cross section in the unconnected stabilizing material 4 made of copper, the connecting and matching process is performed, and then the stabilizing material 4 is bonded. The stabilizing material 4, which covers the vicinity of the ℃ part of the different types of superconducting wires 7 and 8 embedded therein, is continuously formed 41q without any connection. Except for that, 4 superelectric wires 7.
Since 8 is embedded in the stabilizing material 4 with solder, the connecting portions of the different types of superconducting wires 7 and 8 are also filled with solder and are completely electrically connected.

If such a superconducting conductor of this embodiment is used, cold-worked copper can be used as a stabilizing material, so that it can be used for example with a low yield strength of 30 to 40 particles/square. For this reason, the deviation of the force due to the difference in rigidity, elongation, and heat dissipation rate of the connecting portions of the superconducting wires 7 and 8 can be avoided by stabilizing the heel 41' 4, which is constructed continuously without any connections around the superconducting wires 7 and 8. This prevents deterioration of the strength of the extremely small connecting portions, and prevents deterioration of the superconducting properties and damage to the superconducting wires in the connection between the superconducting wires 7 and 8 of the different parts 111. Furthermore, the winding work is extremely easy since the external dimensions are the same as those of an unconnected long conductor, and there is no need to use an extra spacer as in the conventional example shown in FIG. The ease of winding this wire is
In addition to simply meaning the time, it also completely prevents the 9th turn that occurs at the connection part.
Super+fi: /J'W Conductor! It also has the effect of preventing the conductive transition caused by the 11υ.

Next, as in Rikiya's example, we will explain the stability of the super'1α conductor with the same cross section. In general, isolateral heat flux is Figure 7? As shown, the heat flux q is defined as such that the surface A surrounded by the boiling curve 10 and the exothermic curve 11 has a heat flux q. Because it changes depending on the temperature TR,
Even if the heat flux curves 10 are the same, the isolateral heat flux will take a high value in the ultra-'i'ti', j' glands with high ascending I crystallinity l1lc. That is, as shown in FIG. 8, the isolateral heat flux 13 on the high (i) field side has a higher value than the isolateral heat flux 14 on the low magnetic field side, and now 21!
If the cross section is the same as 6121, the cooling will be
[,\'i, since the stability is proportional to the ratio of the isolateral heat flux q6 and the magnetic resistance ρ of the stabilizing material, this ratio is assumed to be constant.''2
Una magnetic field 13+, 13. By selecting , the most efficient arrangement of different Jh superelectric L'$ &'A is achieved.

lAl-, different 4 (+) It is better to have the same cross-section of the super-ton conductor, but if you try, the value will be low. On the station side, there are too many shoulder and d4 boats. The lifting platform is shown in Figure 439. As shown in FIG. The end portion 7 is formed in a step-like shape, and different types of super iIL lines 7 and 8 are connected through this step-like shoulder portion, and a continuous stabilizing material 4 is provided around the end portion 9 without any connection. By doing this, exactly the same effect as described above can be achieved, and the amount of H5-valent superconducting wire for high magnetic fields can be reduced further. Although we have shown the implementation example where the material is 4-strength and M-side, if there is no connection after cold opening, the cross-section may be examined once, and this also allows the implementation described in the previous section. The same effect as in the example can be obtained.

The body deformation of the superconducting wire of the present invention explained above is caused by the structure in which the stabilizing material, which extends around the contact area of different types of superconducting wires, is continuous without connection. , the stabilizing material around the dissimilar superelectric 2-gland connection has a rigidity that is 9. +t Northern ripples can be prevented,
Super 'tlJ', deterioration of conductive properties and selection corners of super thick wires are eliminated,
It is very effective in some cases.

[Brief explanation of the drawing]

The eye map is super tun-! 7 coil hiro i1'i, nogi゛i,
Figure 2 is a cross-sectional perspective view of the superelectric body; Figure 4 is a cross-sectional view of the super-1 [1] The fifth is the conventional dIK #: da,
The connection 1 of the W body shows the structure.・111Slope 1・;4, Figure 6
ij1 side view, Figure 7 is an explanatory diagram of isolateral heat flux, Figure 8n8 is a total thickness i + f2 clear diagram of the cooling stability of the superconducting conductor of this example, and Figure #149 is an illustration of other superconductors adopted in the present invention. ')i'f
Fig. 10 is a side view of a super-filtration body without showing another embodiment of the present invention. 1... Super't [Shitaru Koinope] 4... Stabilizing material, 5
...11 chase, 6 bamboo, 6... half [Fl, 7... oil 1 conductor for low magnetic field, ni wind 8... super 7υ for simple magnetic field, guide P, 9... Let's scissors. Foot of the mountain) Figure v2 Figure Stem 37 〒q Figure 1ag Figure B2 B+

Claims (1)

[Claims] J, different jIha's super i'il, ? ! In a super-HLηl conductor that consists of two wires tied together and a stabilizing material surrounding the conductor, the stabilizing material that covers the vicinity of the connection between different kinds of super-tight conductor wires is unformed. A superconducting conductor whose hallmark is that it is constructed in a continuous manner. 2.1] The connecting end of the superconducting wire described above is formed into a step-like shape, and the step-like end A superconducting conductor with a special feature of connecting comrades in the 1st term of the curse of 1il'J.