JPH0125215B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support device for a poloidal coil for a nuclear fusion device, and in particular, the device has a high displacement speed for generating and controlling plasma in a vacuum vessel, and
Vertical magnetic field coil that slides back and forth many times under high surface pressure.
The present invention relates to a support device for a poloidal coil for a nuclear fusion device that slides and supports a poloidal coil such as a current transformer coil.

Vertical magnetic field coils and current transformers in nuclear fusion devices that generally generate high-temperature, high-density plasma using a magnetic field, confine it in a vacuum container, and fuse the plasma-formed fuel nuclei to generate heat output. In a poloidal coil such as a coil, a large current is passed to generate and control a large current of plasma, heat is generated in the poloidal coil due to joule loss, and the poloidal coil thermally expands. Further, electromagnetic force is generated in the poloidal coil, and the coil support device that supports the coil is required to release thermal expansion of the coil under high surface pressure.

Conventional slide mechanisms that slide and support poloidal coils have a structure in which the displacement speed is slow and the structure is such that they slide under low surface pressure, like the power supply support device of a nuclear fusion device. Under high surface pressure, there was a drawback that galling occurred on the slide surface due to abrasion powder due to abrasion of the slide material.

The present invention has been made in view of the above-mentioned points, and its purpose is to release abrasion powder generated by wear of slide materials used under high surface pressure from the slide surface and prevent galling. An object of the present invention is to provide a support device for a poloidal coil for a nuclear fusion device.

The present invention provides grooves that are substantially parallel to the sliding direction of the sliding flat plate slide member on the sliding surface of the fixed flat slide member above the support, and on the sliding surface of the sliding flat plate slide member below the support, respectively. By providing grooves diagonal to the groove and allowing wear particles to escape into the groove,
It was designed to achieve the intended purpose.

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 shows a schematic configuration of a poloidal coil support device of the present invention.

In the figure, a poloidal coil 1 such as a vertical magnetic field coil or a current transformer coil used in a nuclear fusion device is shown.
is arranged concentrically with the donut-shaped vacuum container in order to generate and control plasma 2 in the vacuum container (not shown), and a large current flows through it.
Heat is generated in this poloidal coil 1 due to joule loss, and the poloidal coil 1 thermally expands.
Further, an electromagnetic force f shown in FIG. 1 is generated in the poloidal coil 1. Therefore, the slide mechanism is formed by installing a sliding flat plate slide member 4 fixed to the poloidal coil 1 and a fixed flat plate slide member 5 fixed to the coil support 3 between the poloidal coil 1 and the coil port 3. That is, in order to release the thermal expansion of the poloidal coil 1 under high surface pressure generated by the electromagnetic force f acting on the poloidal coil 1, the poloidal coil 1 is moved toward the outer circumference of the coil radius (in the direction of arrow P), and at this time the sliding flat plate slides The member 4 moves together with the poloidal coil 1, and the fixed plate slide member 5 is fixed together with the coil port 3. And, in the present invention,
Above the coil port 3, there is a sliding surface of the fixed flat slide member 5, and below the coil port 3, there is a sliding surface of the flat slide member 4. An example is provided with grooves that are substantially parallel and grooves that are oblique to the sliding direction, and an example thereof will be explained with reference to FIGS. 2 and 3. This figure shows an example in which a groove is provided on the sliding surface of the fixed flat slide member 5 above the coil port 3.

As shown in the figure, the groove according to this example consists of a groove 6 provided diagonally in the sliding direction and a groove 7 provided parallel to the sliding direction on the sliding surface of the fixed plate sliding member 5. The pitch of the diagonal groove 6 is set so that the surface pressure acting on the slide material does not increase excessively by providing the groove shorter than the slide width.
When the sliding flat plate slide member 4 fixed to the poloidal coil 1 slides, the abrasion powder generated by the wear of the sliding flat plate slide member 4 is removed by the diagonal groove 6.
It is something that escapes inside. On the other hand, the groove 7 is the diagonal groove 6
The abrasion powder that cannot be completely released is released into the groove 7. In addition, the groove shape is provided so that the total volume of the groove is larger than the volume of wear powder generated by the wear of the sliding flat plate slide member 4, and the wear powder that is harmful to the coil insulation in terms of withstand voltage is removed. It is determined that the voltage does not fall on the coil insulation.

In this way, by providing the grooves 6 oblique to the sliding direction and the grooves 7 parallel to the sliding surface of the fixed flat plate slide material 5, the abrasion powder generated by the wear of the sliding flat plate slide material 4 can be removed from the fixed flat plate slide. Since it can be removed from the sliding surface of the material 5, galling of the sliding flat plate sliding material 4 can be prevented, and thermal expansion of the poloidal coil 1 can be smoothly released to the outer circumferential side of the coil radius under high surface pressure.

Although not explained in detail, coil support 3
Even if grooves are provided on the sliding surface of the lower sliding flat plate slide member 4, grooves that are oblique to the sliding direction and grooves that are parallel to the sliding direction are provided, the functions and effects are the same as those provided in the fixed flat slide plate 5 described above. Same as in case.

According to the present invention described above, in a slide mechanism that has a high displacement speed under high surface pressure and slides back and forth many times, it is possible to remove abrasion powder generated from the slide material due to wear during sliding from the slide surface surface of the slide material. Since it has the effect of eliminating galling, it is very effective as a support device for this type of poloidal coil.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of a support device for a poloidal coil for a nuclear fusion device, FIG. 2 is a front view of a fixed flat slide member having grooves adopted in FIG. 1,
FIG. 3 is a sectional view of FIG. 2. 1... Poloidal coil, 2... Plasma, 3
...Coil port, 4...Sliding flat plate slide material,
5...Fixed flat plate sliding material, 6, 7...Groove.

Claims (1)

[Claims] 1. When supporting a poloidal coil arranged approximately concentrically with the vacuum vessel on a support in order to generate or control plasma within the vacuum vessel, the fixed plate slide member fixed to the support and the fixed A pair of sliding flat sliding members arranged opposite to the fixed flat sliding member and sliding on the opposing surfaces of the fixed flat sliding member and fixed to the poloidal coil are arranged above and below so as to sandwich the support. In a support device for a poloidal coil for a nuclear fusion device, the sliding flat plate is attached to the sliding surface of the fixed flat sliding member above the support, and to the sliding surface of the sliding flat sliding member below the support. 1. A support device for a poloidal coil for a nuclear fusion device, comprising a groove substantially parallel to the sliding direction of a slide member and a groove oblique to the sliding direction.