JPS5950953B2 - Torus type fusion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a torus-type nuclear fusion device, and particularly to improvements in the toroidal coil and its support structure of the torus-type nuclear fusion device.

As shown in FIGS. 1 and 2, a conventional toroidal fusion device has a plurality of toroidal coils 2 arranged radially around the outer circumference of an annular vacuum vessel 1 that confines plasma. The toroidal coil 2
upper and lower bases 4 and 5 via coil support 3 that grips
The configuration is fixed.

The structure of this toroidal coil 2 and coil support 3 is shown in FIG. It is designed to be held by

A center shaft 6 extending in the vertical direction is fixed to the upper and lower bases 4 and 5 at the center of the torus, and a substantially drum-shaped center block 7 is fitted around the outer periphery of the center shaft 9.

When the toroidal coils 2 are energized to a predetermined value, an electromagnetic force m is generated, and the centripetal component of the electromagnetic force m is particularly large. By having , the centripetal component of the electromagnetic force m is supported.

The elasticity of the central block 7 has a compression spring function, and an elastic support structure is usually used in which the compression spring coefficient distribution is adjusted to minimize the deformation of the toroidal coil 2.

FIGS. 4 to 6 show examples of other conventional torus-type fusion devices, and this fusion device includes the center block 7.
It is shaped like a column rather than a drum.

Further, the coil support 3 that holds the toroidal coil 2 is formed wide so that the inner circumferential side edge of the support 3 comes into contact with the outer circumference of the center block 7 through a contact surface 8.

Here, the off-center block 7 is constituted by a compression spring plate 9 and an insulating liner 10, and has an elastic support structure similar to the above.

In this way, conventionally, the center block 7 has an elastic support structure having a compression spring function, and the deflection of the contact surface 8 due to the electromagnetic force m is determined by the size and arrangement of the brush line springs. The magnitude of stress has also been adjusted using this compression spring.

However, it is difficult to equip the toroidal coil 2 with a complex compression spring function as it receives a large centripetal force due to the electromagnetic force m, and there is also a lack of space to attach a sufficiently strong member to the toroidal coil 2. The drawback was that it could not handle stress.

In particular, when the toroidal coil 2 is energized, there is a difference in thermal expansion, so this thermal expansion changes the distribution of the set elastic coefficient, thereby exerting an appropriate elastic support function according to the stress distribution of the toroidal coil 2. The disadvantage was that it would not work.

The present invention was made in order to eliminate such drawbacks of the prior art, and its purpose is to simplify the structure so that it can cope with changes in the distribution of elasticity due to thermal expansion, etc., and thereby adapt to the distribution of stress acting on the toroidal coil. An object of the present invention is to provide a torus-type nuclear fusion device that can exhibit an appropriate elastic support function.

The present invention provides a rib that contacts the center block and has an elastic modulus depending on the stress distribution acting on the toroidal coil on the inner peripheral side of the torus of a coil support that grips the toroidal coil from above and below. The purpose is to elastically support the stress acting on the

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

Here, the same or corresponding parts as in the conventional example are indicated by the same reference numerals, and the explanation of these parts will be omitted.

As shown in FIGS. 7 to 9, the width of the coil support 3 that grips the toroidal coil 2 is expanded integrally with the torus inner circumferential side 31, and the toroidal coil The inner circumferential side of the torus No. 2 is also gripped.

The torus inner circumferential side 31 of this coil support 3 corresponds to a rib in the present invention, and the torus inner circumferential side 31 of this support 3 corresponds to a rib in the present invention.
1 has an adjustment hole 32 formed therein as appropriate.

Further, in this embodiment, the center block 7 does not have an elastic function unlike the conventional one, and is made of the same member as the center shaft 6 or the center shaft 6 itself serves as the center block 7, and the torus of the coil support 3 is attached to the outer periphery of the center block 7. The inner peripheral side 31 is in contact with each other.

Here, the stress m acting on the toroidal coil 2 is often the maximum stress acting horizontally at the center in the vertical direction of the entire torus, and it often becomes gradually smaller toward both sides.

Therefore, the rib, i.e. 1 in the torus of the coil support 3
It is preferable that the elastic modulus of the circumferential side 31 be the smallest at the center in the vertical direction, and increase from there in the vertical direction.

By integrally forming a rib having an elastic function on the torus inner peripheral side 31 of the coil support 3, even if the stress distribution acting on the toroidal coil 2 with respect to the center block 7 changes due to thermal expansion or the like, Since the coil support 3 expands integrally with the toroidal coil 2, a preset elastic modulus distribution can be maintained.

In the above embodiments, the ribs are formed by forming the coil support 3 integrally and widely toward the inner peripheral side 31 of the torus, but there is no need to limit it to this. It may be integrally fixed to the inner peripheral side 31.

In addition, in the embodiment described above, adjustment holes 32 were bored in order to provide an elastic function, but there is no need to be limited to this. For example, it is possible to locally change the plate thickness of the ribs, provide grooves or cuts, Alternatively, a predetermined elastic modulus may be obtained by changing the material of the ribs.

A suitable material for the ribs is titanium alloy or the like.

In addition, according to this embodiment, the center block 7 does not need to have any particular elastic function, and the center shaft 6 itself may be used.Therefore, there is no need to equip a complicated compression spring as in the conventional case, and the structure becomes simple and easy to manufacture. becomes easier.

As described above, according to the present invention, since the inner peripheral side of the torus of the coil support has an elastic function, even if the stress distribution changes due to thermal expansion, etc., an appropriate support structure can be obtained that sufficiently follows this change. Therefore, it has the excellent effect of being able to exhibit an efficient plasma confinement function.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view showing an example of a conventional torus-type fusion device, Figure 2 is a cross-sectional view taken along the line I■-■■ in Figure 1, and Figure 3 is a cross-sectional view showing an example of a conventional torus-type fusion device.
The figure is an enlarged perspective view showing the toroidal coil and coil support in Fig. 1, Fig. 4 is a sectional view showing another example of a conventional torus-type fusion device, and Fig. 5 is a V-V in Fig. 4.
6 is an enlarged perspective view showing the toroidal coil and coil support in FIG. 4; FIG. 7 is a sectional view showing an embodiment of the torus-type nuclear fusion device according to the present invention; FIG. The figure is a sectional view taken along the line Vllll--Vllll in FIG. 7, and FIG. 9 is an enlarged perspective view showing the toroidal coil and coil support in the same embodiment. 1... Vacuum container, 2... Loidal coil, 3... Coil support, 4... Upper base, 5... Lower base, 7 ... Center block, 31 ... Torus inner circumferential side of coil support, 32 ... Adjustment hole.

Claims (1)

[Claims] 1. A plurality of toroidal coils are arranged radially around an annular vacuum container, each of the toroidal coils is fixed to an upper and lower base via a coil support, and a center block is arranged vertically at the center of the torus. The toroidal fusion device is characterized in that a rib is provided on the inner peripheral side of the torus of the coil support, which contacts the center block and has an elastic modulus corresponding to the stress distribution acting on the toroidal coil. Torus type nuclear fusion device. 2. The torus-type nuclear fusion device according to claim 1, wherein the rib has a plurality of holes depending on the stress distribution acting on the toroidal coil and has a predetermined elastic modulus. 3. The torus-type nuclear fusion device according to claim 1, wherein the rib has a plate thickness that is changed according to the stress distribution acting on the toroidal coil and has a predetermined elastic modulus.