JPS586106A - Spool for superconductive magnet - Google Patents

Abstract

PURPOSE:To reduce friction heat between a superconductive wire and a metal spool by applying teflon coating to a spool consisting of aluminum or aluminum alloy to be wound by the superconductive wire. CONSTITUTION:Teflon coating 5 such as Taflite coating is applied to the outside circumference surface of a spool main body 1 consisting of aluminum or aluminium alloy and the inside surfaces 3a, 4a of end sections 3, 4 and a superconductive wire 6 is wound on the teflon coating to form a superconductive magnet. The insulation between the superconductive winding 6 and the spool 1 is applied by the teflon coating 5 and friction heat between the winding and the spool by electromagnetic force produced at the excitation of the superconductive magnet is also reducecd to decrease a quenching phenomenon. Cooling effect is improved by increasing the thermal conductivity between the winding and the spool by the teflon coating.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding frame for a superconducting magnet formed by winding a superconducting wire.

Conventionally, superconducting magnets are constructed by winding a superconducting wire around a core or bobbin made of metal such as stainless steel, steel, or aluminum alloy.

Since it is necessary to electrically insulate between the superconducting wire being wound and the metal winding frame, a sheet of mylar, nylon, etc. is wrapped around the outer circumference of the winding frame, and the superconducting wire is wound on top of it. There is. Insulation between the collar at the end of the winding frame and the winding wire is achieved by using a thin plate of Bakelite, Teflon, glass, epoxy 111rII, or the like.

However, with such a conventional structure, the sheet such as Maitsu, which is wound around the outer part of the winding frame, often breaks due to the pressure caused by the multi-layer winding under tension, and as a result, insulation becomes impossible. There is a fear. In addition, the adhesive material of the thin insulating plate attached as a gap between the collar of the winding frame and the winding wire peeled off at extremely low temperatures9, and it was deformed due to the difference in shrinkage rate from the material of the winding frame itself. There are drawbacks to doing so.

The object of the invention is to eliminate these drawbacks by providing a light with a body made of aluminum or alum alloy.
l that comes into contact with the superconducting wire being wound! An object of the present invention is to provide a winding frame for a superconducting magnet whose open surface is coated with Teflon.

The present invention will be further described below with reference to the accompanying drawings.

The drawing shows a cross-sectional view of an embodiment of the present invention, in which reference numeral 1 denotes a winding frame body made of aluminum or aluminum alloy, and an inner box of 5 m on the outer circumferential surface 2 and end portion 5.4 of this winding frame body 1. , 4a are coated with a Teflon coating 5 such as Taflam coating, and a superconducting wire 6 is wound thereon to constitute a superconducting magnet.

With this structure, in the superconducting magnet reel of the present invention, the surface of the Teflon coating 50 has a very small coefficient of friction, so that the excitation of the superconducting magnet can be easily controlled.
AK reduces the friction between the winding wire and the winding frame due to the generated electromagnetic force, resulting in deterioration of the characteristics of the superconducting magnet.In other words, the quench phenomenon in which the superconducting magnet changes to a normal conductive state due to a local temperature increase due to frictional heat is reduced. Can be made smaller. In addition, by increasing the heat conduction between the winding frame and the winding wire by the tear coating, the cooling effect sound is increased, thereby making it possible to prevent the deterioration of the superconducting magnet's O% property.

As explained above, the superconducting magnet reel according to the present invention does not use insulating Mylar sheets, Teflon, Bakelite, or other materials as in the past, so it does not have the above-mentioned drawbacks caused by them. Rather, as explained above, it is useful in preventing deterioration of the characteristics of the superconducting magnet.

[Brief explanation of the drawing]

The FIIJ plane is a cross-sectional view showing one embodiment of the winding frame for a superconducting magnet according to the present invention. In the figure, 1: Reel body, 2: Outer surface, 5, 4: End, Sm
, 4a: inner surface, 5: Teflon coating, 6: superconducting wire.

Claims (1)

[Claims] A winding frame for a superconducting magnet made of aluminum or aluminum alloy, and coated with Teflon, which has a very small coefficient of friction and good thermal conductivity, on the surface that contacts the superconducting wire being wound.