JPH04261004A - Fabrication of superconducting coil - Google Patents

Abstract

PURPOSE:To fabricate a sturdy superconducting coil where no gap is formed among wound superconductors and those superconductors are not moved even with predetermined electromagnetic force exerted thereon. CONSTITUTION:A plurality of hydraulic jacks are disposed circumferentially of a core 1, and a superconducting wire 4 is wound on the core 1 into a solenoid shape, pressing at all times a winding transition part 5 and the left end of the wound superconducting coil 3 in the direction of a flange 2 using a press rod 28. Herein, slightly before the winding transfer part 5 reaches the,press rod 28, the press rod 28 located at that portion is 7 moved left. Hereby, when the winding transfer part 5 reaches the right of the press rod 28 the winding transfer part 5 is again pressed by the press rod 28. The superconducting wire 4 wound thus in succession is pressed at all times axially of the superconducting coil 3 whereby the superconducting coil 3 is formed, preventing spring-back from being produced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a superconducting coil, and more particularly to a method of manufacturing a superconducting coil in which a strong superconducting coil is obtained by reducing the gap between superconducting conductors of the superconducting coil.

0002

[Prior Art] FIG. 4 shows, for example, Japanese Patent Application Laid-Open No. 60-173807
1 is a cross-sectional view showing a conventional superconducting coil manufacturing apparatus described in the above publication. In the figure, reference numeral 1 denotes a cylindrical winding core, which is rotationally driven in the direction of an arrow R in the figure by a drive device (not shown), and has a flange 2 fixed at its end. 3 is a superconducting coil wound in a solenoid shape on the winding core 1; 4 is a superconducting wire that is a superconducting conductor forming the superconducting coil 3;
6 is a stepped roller; 7 is a pressing side surface of the stepped roller 6; 8 is a stepped roller 6;
9 is a support member that rotatably supports the stepped roller 6 via the support shaft 10 , and 11 is provided between the fixed part 12 and the support member 9 and supports the stepped roller 6 via the support member 9
This is a coil spring that pulls the force f1 in the direction of arrow A in the figure with a predetermined force f1. The stepped roller 6 is configured to be pressed by a hydraulic cylinder (not shown) in the direction of arrow B in the figure with a predetermined force f2.

Next, a method for manufacturing the superconducting coil 3 will be explained. The superconducting wire 4 is continuously supplied to the winding core 1 from a drum (not shown), and is sequentially wound around the outer periphery of the winding core 1 by rotationally driving the winding core 1, thereby forming the superconducting coil 3. At this time, a tensile force is applied to the superconducting wire 4 and the left side of the winding transition part 5 where the superconducting wire 4 begins to be wound around the winding core 1 is pressed by the coil spring 11 to the flange 2 via the pressing side 7 of the stepped roller 6. , it is pressed to the right in the figure with a predetermined force f1, and at the same time, a hydraulic cylinder (not shown) is used to wrap the transition part 5 via the pressing tread 8 while pressing it downward in the figure with a predetermined force f2. . In addition,
The stepped roller 6 rotates due to contact friction with the superconducting wire 4.

By using the method for manufacturing a superconducting coil as described above, the superconducting coil 3 is formed without creating a gap between the wound superconducting wires 4. By preventing the superconducting wire 4 from moving even if a large electromagnetic force acts in the axial direction of the superconducting coil 3 during energization, the quench phenomenon in which the temperature of the superconducting wire 4 rises due to frictional heat and shifts from a superconducting state to a normal conducting state is prevented. It is intended that this will be done.

[0005]

[Problems to be Solved by the Invention] However, since the conventional method for manufacturing a superconducting coil is configured as described above, the winding transition portion 5 pressed by the stepped roller 6 has a pressure in the axial direction of the winding core 1. Although a pressure f1 is applied, the part where the stepped roller 6 passes and is released from the pressing force creates a gap between the wound superconducting wires 4 due to the springback of the superconducting wire 4, and the intended purpose is not achieved. There were cases where it was not possible.

This invention was made to solve the above problems, and it is possible to manufacture a strong superconducting coil in which the wound superconducting conductor does not move even when a predetermined electromagnetic force is applied. The purpose of the present invention is to provide a method for manufacturing superconducting coils that can be manufactured using the following methods.

[0007]

[Means for Solving the Problems] A method for manufacturing a superconducting coil according to the present invention includes a plurality of superconducting conductors wound around a winding core that can be pressed independently from each other in the axial direction of the winding core. The method includes a step of disposing a pressing member in the circumferential direction of the winding core and winding the superconducting conductor while pressing it in the axial direction of the winding core.

[0008]

[Operation] In this invention, a plurality of pressing members provided in the circumferential direction of the winding core are used to wind the superconducting conductor while pressing the winding transition part where the superconducting conductor is wound around the winding core and the superconducting conductor that has already been wound. I'm going to turn it. That is, just before the wrapping transition portion comes to one pressing member, the pressure is released to create a gap in which the superconducting conductor enters, and when the wrapping transition portion comes into this gap, the pressing member is pressed again. The already wound superconducting conductor is also pressed by another pressing member to prevent springback. Therefore, it is possible to prevent the superconducting conductor that has been wound from moving due to springback and creating a gap between the wound superconducting conductors. Therefore, it is possible to obtain a strong superconducting coil in which the superconducting conductor does not move even if a predetermined electromagnetic force acts on the superconducting conductor.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show an embodiment of the present invention, with FIG. 1 being a sectional view and FIG. 2 being a plan view of a movable flange. In these figures, 21 is a male thread provided on the winding core 1, 22 is a ring nut that is screwed into the male thread 21, and 23 is a movable flange that presses the superconducting coil 3 by turning the ring nut 22. and Figure 2
As shown in FIG. 2, there are six holes 24 through which pressing rods 28 of a hydraulic jack 27 (described later) pass through, and a central hole 25 larger than the outer diameter of the male threaded portion 21. 26 is a support flange fixed to the left end of the winding core 1; 27 is a hydraulic jack provided at six locations on the support flange 26;
The winding transition portion 5 and the already wound left end superconducting wire 4, that is, the left end portion of the superconducting coil 3 are individually pressed at a total of six locations on the circumference. Note that the hydraulic jack 27 and the pressing rod 28 are examples of the pressing member in this invention.

Next, a method of winding the superconducting coil 3 will be explained. Prior to the start of winding the superconducting wire 4 around the winding core 1, the movable flange 23 is inserted from the left side of the winding core 1, and the ring nut 22 is screwed into the male threaded portion 21. After that,
A support flange 26 is fixed to the winding core 1, and furthermore, hydraulic jacks 27 are fixed at six locations on the support flange 26. When fixing the hydraulic jack 27, the pressing rod 28 is aligned so as to pass through the hole 24 of the movable flange 23. After the above preparations, the superconducting wire 4 is sequentially wound around the core 1 from the right side toward the flange 2 while applying sufficient tension to the superconducting wire 4. At this time, the winding transition portion 5 and the already wound superconducting wire 4 are constantly pressed to the right in the figure by the pressing rods 28 of the six hydraulic jacks 27 disposed on the support flange 26, but the pressing rods 28 and retract the pressing rod 28 to the left just before the transition part 5 reaches the part 28. When the winding transition part 5 reaches the winding transition part 5, the winding transition part 5 is moved to the right again and the winding transition part 5 is pressed. I try to press it in the right direction. After a predetermined number of turns have been completed in this manner, the movable flange 23 is pressed against the superconducting coil 3 by turning the ring nut 22 while pressing the superconducting coil 3 with the hydraulic jack 27 and fixing it. At this time, the movable flange 23 does not rotate but moves to the right. After that, the hydraulic jack 27 is released and removed together with the support flange 26.

In the embodiment shown in FIG.
An example is shown in which the superconducting wire 4 is pressed to the right in the axial direction and the superconducting wire 4 is brought into close contact with the winding core 1 by the tensile force applied to the superconducting wire 4. However, if necessary, the superconducting wire 4 and the winding transition part 5 can be directed from the outer periphery to the center. A pressing member may be provided to press the surface.

Furthermore, in the embodiment shown in FIG. 1, the movable flange 23 is held down by the ring nut 22 in order to finally hold down the superconducting coil 3, but as shown in FIG. It may be tightened with a plurality of tightening bolts 34 provided above, for example eight tightening bolts 34, or other changes may be made as appropriate. Furthermore, the same effect can be achieved even if the winding core 1 has a cylindrical shape, a square shape, or any other shape.

[0013]

As described above, according to the present invention, a plurality of pressing members that can press independently of each other in the circumferential direction of the winding core are provided to push the superconducting conductor in the axial direction of the winding core. Since the step of winding while pressing is provided, it is possible to manufacture a strong superconducting coil in which the superconducting conductor does not move even if a predetermined electromagnetic force is applied to the wound superconducting conductor.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a movable flange according to an embodiment of the present invention.

FIG. 3 is a sectional view showing another embodiment of the invention.

FIG. 4 is a sectional view showing a conventional superconducting coil manufacturing apparatus.

[Explanation of symbols]

1 Winding core 3 Superconducting coil 4 Superconducting wire 27 Hydraulic jack 28 Push rod

Claims (1)

[Claims] Claim 1: A method for manufacturing a superconducting coil in which a superconducting coil is manufactured by winding a superconducting conductor in the axial direction of a winding core, wherein the superconducting conductors wound around the winding core are wound independently from each other in the axial direction. A method for manufacturing a superconducting coil, characterized in that a plurality of pressing members capable of pressing are arranged in the circumferential direction of the core, and the superconducting conductor is wound around the core while being pressed.