JPH11329824A - Superconducting coil load support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To support electromagnetic force and absorb dimensional gap of each member at the same time by making the load support between superconducting coils support each superconducting coil only radially and enabling it to slide freely in the axial direction. SOLUTION: The upper parts of a supercoducting coil 1 and a superconducting coil 2 are screwed to a coil supporter 3 by a fixing bolt 6, and the lower part of the superconducting coil 1 inside alone is screwed to a radial load supporter 5 by the fixing bolt 6. Then an outer circumference 6' of the radial load supporter 5 is fit in the inner circumference of the superconducting coil 2 outside. When the radial load acts on the superconducting coil 1 and the superconducting coil 2, the load is received by the outer circumference 6' of the radial supporter 5. Meanwhile, the superconducting coil 2 and the outer circumference part 6' of the radial supporter 5 are not fixed by screwing, etc., but is made to simply bring into contact with each other and the coils are made freely slidable in an axial direction (vertical directions).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support for a superconducting coil, and more particularly to a load support capable of expanding and contracting in an axial direction and receiving a load in a radial direction.

[0002]

2. Description of the Related Art Various types of supports have been devised for superconducting magnets in which a stronger electromagnetic force acts than in a normal conducting magnet. FIG.
FIG. 3 shows an example. FIG. 2 shows two coil supports on one coil support.
This is an example of a structure in which three superconducting coils are suspended.
The superconducting coil 1 and the superconducting coil 2 concentric with the superconducting coil 1 are screwed to the coil support 3 with fixing bolts 6, and all the loads in the axial direction and the vertical direction are received by the coil support 3. In this structure, when the center axis of the superconducting coil 1 and the center axis of the superconducting coil 2 are displaced, an electromagnetic force acts on the respective superconducting coils in a direction opposite to the displacement of the center axis, so that the bending force is applied to the coil support 3. -Mention works.

[0003] Even when the coil is installed such that the central axis of the coil is horizontal, a bending moment due to the weight of the coil acts on the coil support 3. Therefore, it is necessary for the superconducting magnet used in the above situation to take measures against this bending moment.

FIG. 3 shows an example in which a support 3 and a pair of coil supports 4 are added to support the bending moment. In FIG. 3, the coil support 4 functions as a support against a radial load, and the displacement of the central axis and the bending moment acting when the coil is installed horizontally can be reduced.

In the structure shown in FIG. 3, when the superconducting coil is cooled to an extremely low temperature (usually about 4K), a problem arises when the amount of heat shrinkage of the superconducting coil differs for each coil. Superconducting coil 1 and superconducting coil 2
If the lengths of the coils are different or the materials forming the coils are different, the thermal shrinkage is different between the two coils, so that thermal stress acts in the axial direction of the superconducting coil fixed by the support 3 and the support 4. There are many problems in designing a coil to withstand the thermal stress, such as an extremely thick winding frame.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for supporting an electromagnetic force acting on a coil in a superconducting magnet and at the same time absorbing a dimensional deviation of each member due to thermal contraction.

[0007]

SUMMARY OF THE INVENTION In a magnet device having a plurality of superconducting coils, a load support between the superconducting coils supports each superconducting coil only in a radial direction, and can freely slide in the axial direction. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given based on FIG. The superconducting coil 1 and the superconducting coil 2 are screwed to the coil support 3 with fixing bolts 6 above, and only the inner superconducting coil 1 is screwed to the radial load support 5 with fixing bolts 6 below. Since the outer periphery 6 ′ of the radial load support 5 is fitted into the inner periphery of the outer superconducting coil 2, when a radial load acts on the superconducting coil 1 and the superconducting coil 2, the radial support 5 The outer periphery 6 'can receive a load. The superconducting coil 2 and the radial load support 5
The outer peripheral portion 6 ′ is in contact only without being fixed by screws or the like. Therefore, it can slide freely in the axial direction (vertical direction in the figure), and can absorb the difference in the amount of thermal contraction in the axial direction.

[0009]

Even if the lengths of the superconducting coil 1 and the superconducting coil 2 are different or the materials constituting the coils are different, and the amount of heat shrinkage is different between the two coils, the structure according to the present invention is applied to the superconducting coil. At the same time as supporting the electromagnetic force, it is possible to absorb the dimensional deviation of each member due to thermal shrinkage, and it has become possible to solve the problems of the prior art.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of the present invention.

FIG. 2 shows a conventional example of a support structure for a plurality of superconducting coils.

FIG. 3 is a view showing another example of a support structure of a plurality of superconducting coils, and showing a configuration in which the superconducting coils are screwed together with a pair of supports.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 superconducting coil 2 superconducting coil 3 coil support 4 coil support 5 radial load support 6 fixing bolt

Claims (1)

[Claims] 1. A magnet device having a plurality of superconducting coils, wherein a load support between the superconducting coils supports each superconducting coil only in a radial direction, and is free to slide in an axial direction. Superconducting coil load support.