JPS60180105A - Superconductive magnet - Google Patents

Abstract

PURPOSE:To obtain a coil construction which has less quenching frequency due to the movement of a winding wire without using the external diameter side space of an electromagnet by means of increasing the diameter of a winding affecting tension to the winding from the internal diameter side. CONSTITUTION:Means of increasing the diameter of a winding 2 affecting tension from the internal diameter side of the winding 2 is used. For example, one of the screw holes 7, 7' of the internal cylinder 5 of a bobbin is made a reverse screw hole and by turning a screw 6, the diameter of the internal cylinder 5 can be changed. Otherwise, a material of smaller coefficient of thermal contraction than the coefficient of the winding 2 is used for the internal cylinder of the bobbin 1 and at the time of cooling, a force of naturally expanding the winding 2 is generated. In this way, if an electromagnet is expanded from the internal diameter side before the electromagnet is affected by the electromagnetic force due to a current and the stress in the winding 2 is equalized, a winding wire is not moved and accordingly, the quenching of the electromagnet is not generated even if the winding 2 is affected by a force of expansion due to the electromagnetic force by the current.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] Regarding the structure of superconducting electromagnets.

[Prior art and its problems]

As shown in Figure 1, conventional super-conducting magnets have wires wound around a winding frame with a U-shaped cross section to form a winding section 2ts, and the wires of the winding section move relative to each other to quench the electromagnet. In order to prevent this from occurring, a cylinder 3 or the like was placed on the outer diameter side of the winding part to compress the winding part. In this case, the cylinder was shrink-fitted and covered with C. Alternatively, you can replace the C cylinder with a reinforcing winding in a place equivalent to the cylinder, cover the cylinder without shrink-fitting it, set a screw 4 on the cylinder 3 as shown in Figure 2, and compress the winding part 2 with the screw. 〔there was.

In these cases, extra space is required to install a cylinder, etc. on the outside diameter side of the winding part, or the force from the cylinder to the winding part is compressive force, so the winding part is compressed into a perfectly circular case. First, there is a problem in that stress non-uniformity occurs within the windings, which causes movement between the windings during straight-through and induces quenching.

[Purpose of the invention]

An object of the present invention is to provide a coil structure that does not use the outer diameter side projections 1 of the electromagnet and is less frequently quenched due to movement between the wires.

[Summary of the invention]

The present invention is to equalize the stress within the winding part by applying a force to expand the winding part from the inside diameter side of the electromagnet, and to eliminate movement between the wires before the magnetic force moves.

〔Effect of the invention〕

'The space on the outer diameter side of the electromagnet can be used effectively.

Also, the frequency of electromagnet quenching is significantly reduced.

[Embodiments of the invention]

Fig. 3.4.5 shows a specific embodiment of the present invention in which the diameter of the cylinder 5 of the winding frame is increased after the winding beam is applied.

Figure 3 is a longitudinal cross-sectional view, Figure 4 is a cross-sectional view, and Figure $5 is the diameter of Figure 4? It is an enlarged view of the inflating mechanism.

In Fig. 5, one of the screw holes 7 and 7' of the inner cylinder 5 of the C1 winding frame has a reverse thread.
The diameter of can be changed.

In addition to this method, it is also possible to fully push the winding portion out using a screw from the inner diameter side of the electromagnet, as shown in FIG. Alternatively, there is also a method of inserting a second cylinder that is cold-fitted further inside the inner cylinder of the winding frame. Furthermore, if a material having a smaller C heat shrinkage rate than that of the C winding section is used as the material for the inner cylinder of the winding frame, a force that naturally expands the winding section will be generated during cooling. In this way, before the energizing electromagnet force is applied to the electromagnet C1, the electromagnet is expanded from the entire inner diameter side, and the stress on the winding part is made uniform. There is no movement, and no quenching of the electromagnet occurs.

Simple explanation of drawings FIG. 3 is a cross-sectional view of a magnet.

l... Reel frame.

2...Winding section.

5...Cylinder.

Agent: Patent Attorney Noriyuki Chika (1 other person)

Claims (1)

[Claims] A superconducting magnet characterized in that it is provided with means for increasing the total diameter of the winding part by applying tension from the inner diameter side to the winding part of the superconducting magnet.