JPS6110964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in superconductor structures for immersion cooled superconductor devices.

Superconductor devices are widely used in various fields and have achieved great effects. However, superconductors undergo a normal conduction transition phenomenon called quenching due to thermal disturbances or the like. This quenching causes problems such as deterioration of various properties of the superconductor and, in the worst case, burnout of the superconductor. Conventionally, for example, as shown in FIG. 1, grooves 2 and 3 are provided on the surface of a superconductor 1 to increase the contact area with a coolant such as liquid helium that cools the superconductor 1.
Efforts have been made to increase cooling capacity. That is, as shown in FIG. 1A, a plurality of grooves 2 are provided along the length of the conductor 1, or as shown in FIG. Such grooves 2 and 3 were able to absorb a large amount of the Joule heat generated in the normal conduction region and to moderate the expansion of the normal conduction region. However, when forming a superconductor device by winding superconductors 1 having such a structure, an insulating spacer is arranged between the conductors 1 to ensure electrical insulation. This insulating spacer includes the groove 2,
It goes without saying that you should never be depressed at 3. Therefore, in the superconductor device obtained by winding as described above, the coolant flow path is defined in the longitudinal direction of the conductor 1. For this reason, the air bubbles generated by the refrigerant absorbing the Joule heat have only an escape route in the longitudinal direction, and the air bubbles remain on the surface of the conductor 1, resulting in a reduction in cooling ability.

The present invention has been made in consideration of these circumstances, and its purpose is to improve the cooling capacity of superconductors using a refrigerant, and to improve the thermal characteristics of devices. The purpose of this invention is to realize and provide a superconductor device with a simple structure.

That is, in the device of the present invention, the grooves are provided in a diagonal direction with respect to the longitudinal direction of the conductor, thereby forming a refrigerant flow path diagonally, thereby preventing air bubbles from remaining and improving the cooling capacity. It's something that happened.

Hereinafter, one embodiment of the apparatus of the present invention will be described with reference to the drawings.

FIG. 2 is a perspective view showing the structure of the superconductor according to the present invention, showing the front surface 11a and the back surface 1 of the superconductor 11.
A groove 12 is formed in each of the conductors 1b in a direction diagonal to the longitudinal direction of the conductor 11. These grooves 12 are formed on the front and back surfaces 11 of the conductor 11, respectively.
It is formed in a spiral shape so as to cross each other at points a and 11b. Then, an insulating spacer 13 is attached to the superconductor 11 having such a shape.
As shown by the dotted line in the figure, the groove 12 is wound in a spiral manner so as to intersect with the groove 12.

As shown in FIG. 3, the superconductor 11 wrapped with the insulating spacer 13 is wound into a loop to form a superconducting coil 14. As shown in the schematic diagram of FIG. 4, the coil 14 is housed in a cryogenic container 15, immersed in liquid helium 16 as a coolant, and driven by superconductivity. The liquid helium 16 is supplied from the refrigerant supply port 15a of the container 15, circulates within the container 15, absorbs the heat generated by the coil 14, and then is discharged from the exhaust port 15b.

According to the present apparatus configured in this way, the superconducting coil 14 is cooled by contact with the refrigerant 16, kept at an extremely low temperature, and driven by superconductivity. At this time, the coolant 16 circulates through the flow path defined by the grooves 12 between the superconductors 11 formed by the insulating spacers 13. That is, the refrigerant 16 has a large contact area with the superconductor 1, and forms a flow path in a direction oblique to the longitudinal direction of the conductor 11, that is, in the direction shown by the arrow in FIG. Therefore, the Joule heat generated in the normal conductive region of the superconductor 11 is absorbed with high efficiency, and the helium bubbles generated by this heat absorption are guided to the outside without being retained on the surface of the conductor 11. Therefore, it is possible to perform extremely efficient heat absorption, that is, cooling. Then, the functions of the superconducting coil 14 can be fully utilized. Moreover, when configuring the device, the groove 12 is simply provided in a diagonal direction with respect to the longitudinal direction of the superconductor 11, and the insulating spacer 13 is arranged to intersect with the groove 12, thereby easily realizing it. can. Further, when winding the insulating spacer 13, the spacer 13 does not fall into the groove 12, and there is no need to take any special precautions against this. Therefore, this device can be manufactured very easily, and its advantages are enormous.

Note that the present invention is not limited to the above embodiments. For example, the shape and number of grooves may be determined depending on the structure and specifications of the superconductor.
In particular, it does not have to be formed only on the front and back sides. Also, regarding the insulating spacers, they may not be wound spirally, but may be successively inserted between them when winding the superconductor. Furthermore, the winding shape of the superconductor is not limited either. In short, the present invention can be implemented with various modifications without departing from the gist thereof.

As detailed above, according to the present invention, especially in a superconductor device in which a superconductor having a vertical structure is wound, the cooling capacity of the device can be increased, and the thermal characteristics of the device can be improved in a stable manner. It is possible to realize and provide a superconductor device with a simple structure that exhibits various extraordinary effects and advantages such as the ability to

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the conventional structure of a superconductor, FIGS. 2 to 4 show an embodiment of the device of the present invention, FIG. 2 is a diagram showing the structure of a superconductor, and FIG. FIG. 4 is a diagram showing a schematic structure of a superconducting coil, and FIG. 4 is a schematic diagram showing the entire device. DESCRIPTION OF SYMBOLS 11... Superconductor, 12... Groove, 13... Insulating spacer, 15... Cryogenic container, 16... Refrigerant (liquid helium).

Claims (1)

[Claims] 1. In a superconductor device formed by winding a superconductor, grooves are provided on the surface of the superconductor in a direction oblique to the longitudinal direction of the superconductor, and grooves are provided on the surface of the superconductor so as to intersect with the grooves. A superconductor device characterized in that an insulating spacer is provided at the top.