JPH01196801A - Winding method for superconducting coil - Google Patents

Abstract

PURPOSE:To tighten a superconducting coil fast by a uniform force and to simplify an operation, by utilizing a difference in thermal expansion between a ring and a spool to fix the superconducting coil. CONSTITUTION:A superconducting wire 2 is wound on a spool 1 with a prescribed tension. A ring 3 made to have a prescribed temperature difference from the spool 1 is fitted into the spool 1 in a state wherein the outside diameter of the ring turns smaller than the inside diameter of the spool 1. A projecting part 1a of the spool 1 is made to engage with an indent 3a of the ring 3. In a process wherein the temperatures of the spool 1 and the ring 3 turn to be a prescribed degree from said state, the ring 3 gives the spool 1 a uniform force in the direction of the outside diameter, so as to tighten the wound superconducting wire 2 firmly. Thereby a superconducting coil is tighten fast by the uniform force and an operation is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for winding a superconducting coil.

[Conventional technology]

JP-A-60-26 as a conventional method of winding superconducting coils
There is a method shown in Publication No. 0105, and this will be explained with reference to FIG. 2. A shrinking jig (4) is attached to the winding frame (1) in advance with a bolt (5) to a predetermined torque. Tighten it. In this state, the superconducting wire (2) is held at a predetermined tension by the winding frame (
1). After winding, the bolt (5) and the reduction jig (4) are removed, the winding frame (1) is tensioned on the outer diameter side, and the superconductor #1J (2) is firmly tightened.

[Problem to be solved by the invention]

Since the conventional 1fflK conductive coil winding method is performed using the method described above, the compressive force of the bolt is not applied uniformly to the entire winding frame, resulting in uneven distribution of force within the superconducting coil, and the superconducting Performance as a coil This invention was made to solve the above-mentioned problems, and provides a method for winding a superconducting coil that applies force uniformly to a superconducting coil and improves workability. The method is
With the superconducting coil wound around the winding frame, a ring with a temperature difference between the two winding frames is inserted into the winding frame with the outer diameter of the ring being smaller than the inner diameter of the winding frame. In this invention, a force is applied from the ring to the winding frame in the radial direction while the ring fitted in the winding frame and the winding frame are kept at a constant temperature.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

First, the superconducting wire (2) is wound around the winding frame (1) with a predetermined tension. Thereafter, the ring (3), which has a predetermined temperature difference from the winding frame (1), is fitted into the winding frame (1) with its outer diameter smaller than the inner diameter of the winding frame (1). At this time, the winding frame (1
) is engaged with the recess (3a) of the ring (3) to prevent rotation.

From this state, as the winding frame (1) and ring (3) reach a constant temperature, the ring (3) applies a uniform force in the outer radial direction to the winding frame (1) to strengthen the superconducting wire that has been wound once. to be tightened.

In the above embodiment, the protrusion is provided on the winding frame, but the same effect can be achieved even if the protrusion is provided on the slot.

〔Effect of the invention〕

As described above, according to the present invention, the superconducting coil is fixed using the difference in thermal expansion (contraction) between the ring and the winding frame, so the superconducting coil can be tightened with uniform force, simplifying the work. , it is possible to provide a highly reliable superconducting coil.

[Brief explanation of the drawing]

FIG. 1 is for explaining one embodiment of this invention.
(a) is a sectional view showing a winding process, and (b) is a perspective view of a ring. FIG. 2 is for explaining a conventional method of winding a superconducting coil, in which (a) is a sectional view showing the winding process, and (b) is a front view. (1)... winding frame, (2)... superconducting wire, (3)... ring. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Teru Gado□゛;

Claims (1)

[Claims] In a method for winding a superconducting coil formed by winding a superconducting wire around a winding frame, after winding, a ring having a temperature difference from the winding frame is placed on the inner diameter side of the winding frame. The superconducting coil is fitted with the outer diameter smaller than the inner diameter of the winding frame, and when the ring and the winding frame reach a certain temperature, pressure is applied from the ring to the winding frame to tighten the superconducting coil. A method of winding a superconducting coil.