JP2010118457A - Superconducting coil and manufacturing method of superconducting coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-dimensional bend part in a superconducting coil to which a tape-like superconducting wire is wound. <P>SOLUTION: The superconducting coil with the tape-like superconducting wire wound therearound includes a body in which a coil axis direction is perpendicular with respect to the edge surface of both side end edges in the width direction of the superconducting wire, and the three-dimensional bend part in a three-dimensional shape is provided continuously on a part in the circumferential direction of the body. The three-dimensional bend part is formed by providing a twist section in which the width direction surface of the superconducting wire is inclined to the coil axis direction and inclined in the length direction to the body while being twisted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a superconducting coil and a method of manufacturing the superconducting coil, and more specifically, a superconducting coil in which a tape-shaped superconducting wire is wound, and a deformed shape having a three-dimensionally bent portion in which an edge side end surface is inclined with respect to a coil axis. It is what you are trying.

A superconducting coil in which this type of tape-shaped superconducting wire is wound is formed by winding a superconducting wire 2 along the outer peripheral surface of the winding frame 1 as shown in FIGS. The edge side end surface X where the edges 2b at both ends in the width direction of the wide surface 2a extending in the length direction of the wire 2 are stacked is in a direction orthogonal to the coil axis L.
As shown in FIG. 8C, when a bent portion B is provided in a part of this superconducting coil with the edge side end face X rising or inclined from the direction orthogonal to the coil axis L, the edge side edge It is necessary to bend X and perform so-called edgewise bending.
However, since the superconducting wire is in the form of a tape, when it is edgewise bent, it can be bent only with a large curvature, and if it is bent with a small arbitrary curvature to provide a three-dimensional bent part, it deteriorates into a superconducting wire. Damage. Therefore, it cannot be a complicated shape like a saddle coil.

For example, in Japanese Patent Laid-Open No. 6-342718 (Patent Document 1), as shown in FIG. 9, superconductors 6A and 6B are printed or applied in a spiral shape with a wide surface as a plane on the upper and lower surfaces of a ceramic insulating plate 5. There has been proposed a superconducting coil in which superconductors formed in a spiral shape on the upper and lower surfaces are laminated with one being a right spiral and the other being a left spiral.
The superconducting coil has a so-called edgewise winding shape because the wide surface is spiraled, but this can be formed by printing or applying a superconductor on a ceramic insulating plate.
However, when a coil is formed by winding a tape-shaped superconducting wire around a winding frame, it cannot be edgewise bent with an arbitrary curvature as described above.

JP-A-6-342718

  The present invention has been made in view of the above problems, and in a superconducting coil in which a tape-shaped superconducting wire is wound, a bent portion whose edge side end face is not perpendicular to the coil axis direction in a part of the circumferential direction. That is, it is an object to make it possible to easily provide a three-dimensional bent portion similar to that obtained when edgewise bending is performed without causing deterioration or damage to the superconducting wire.

In order to solve the above problems, the present invention is a superconducting coil wound with a tape-shaped superconducting wire,
A body portion in which the coil axis direction is a perpendicular to the edge surfaces of both side edges of the superconducting wire;
A three-dimensional bent portion provided continuously with a part of the body portion in the circumferential direction;
The three-dimensional bent portion is formed by providing a torsion section that inclines in the length direction with respect to the main body portion while twisting the width direction surface of the superconductor with respect to the coil axis direction. A superconducting coil is provided.

The present invention also provides a method for manufacturing the superconducting coil,
On the worktable for winding the superconducting wire, a shaping table having an inclined surface on the surface is fixed at a position corresponding to the three-dimensional bending portion provided in the superconducting coil, and the winding frame is mounted, and A solid formation part is provided in advance on both sides, and the solid formation part of the winding frame is placed on the shaping table,
The superconducting wire to be wound is wound along the outer peripheral surface of the winding frame so that the coil axis direction is perpendicular to the edge surfaces of both side edges of the superconducting wire. A superconducting coil manufacturing method is provided, wherein the superconducting coil is wound while being twisted while being inclined with respect to the coil axis direction.

  That is, in a region where a three-dimensional forming part of a reel is placed on a shaping table fixed on a winding work table, a superconducting wire is wound along the reel, and a three-dimensional bent part is formed in the wound state. Wrap it around the reel while twisting it so that the wide surface of the wire lays down toward the outer periphery or inner periphery, and then get up from the state of sleeping from the outer periphery to the inner periphery or from the inner periphery to the outer periphery By winding it around, it bends in three dimensions while rising from the main body. Thereby, the superconducting coil which has a three-dimensional bending part can be easily manufactured by winding a superconducting wire on a winding worktable and a shaping base, and taking out a winding frame.

In the superconducting coil of the present invention, as described above, in the portion where the angle from the main body portion to the three-dimensional bent portion is converted, only the twist is applied within a range in which the superconducting wire is not deteriorated or damaged. By changing the angle (inclination angle), it is possible to easily change the angle of the three-dimensional bent part rising from the main body part.
The three-dimensional bent portion is referred to as a three-dimensional bent portion because it has a three-dimensional form in which the edge surface protrudes from the main body portion perpendicular to the coil axis direction so that the edge surface rises at a required angle.
Any number of the three-dimensional bent portions can be provided at any location in the circumferential direction of the coil, and the superconducting coil can be easily formed into a desired different shape.
As described above, in the case of edgewise winding without degrading or damaging the superconducting wire, the curvature becomes large and the coil becomes large. However, in the coil of the present invention, the superconducting wire is twisted without edgewise winding. Therefore, an irregularly shaped coil having a three-dimensionally bent portion can be provided without increasing the size of the coil.

The twist section preferably has a curvature of φ80 mm or more, and the twist length is set so that the twist section angle per unit length of the wire is 20 ° / cm or less.
From the experience of manufacturing a tape-shaped superconducting wire, the curvature is based on being able to be wound around the superconducting wire without causing deterioration or damage if it is φ80 mm or more.

As described above, the superconducting coil of the present invention only needs to have a shape in which a three-dimensional bent portion is provided in a part of the circumferential direction.
Specifically, the three-dimensional bent portion includes the twisted sections that are continuous with the main body on both sides facing each other in the circumferential direction, and is raised from the main body in the twisted sections and is sandwiched between the twisted sections on both sides. The part has a shape in which the edge surface is perpendicular to the coil axis direction and is curved in the circumferential direction to form an arc, and the connecting portion of the three-dimensional bent portion and the main body are not located on the same plane.
Alternatively, the entire three-dimensional bent portion is provided as a torsional section that is continuous with the main body portion, and is curved in the circumferential direction into an arc shape, and the main body portion and the apex of the arc shape are not located on the same plane. It is said.

  The solid bent portions on both sides may be raised at the same angle or at different angles. Further, the three-dimensional bent portions on both sides may be arcuate with different curvatures, the one-side three-dimensional bent portion may be a three-dimensional bent portion having a large curvature, and the other three-dimensional bent portion may be a three-dimensional bent portion having a small curvature.

The main body portion may be a saddle type coil that is bent up in the circumferential direction on the same plane, and the arc portions on both sides are bent three-dimensionally.
A pair of saddle-shaped coils is provided, which is preferably used in combination with the outer peripheral surface of a cylindrical duct that forms an acceleration cavity of a synchrotron accelerator.
That is, the main body portion of the superconducting coil is arranged along the axial direction on the outer surface of the cylindrical tube, the solid bending portions are arranged on both sides in the axial direction, and an annular portion is formed by the solid bending portions of a pair of opposing superconducting coils. And the duct is attached so that it can penetrate.

  Alternatively, a modified racetrack coil may be formed by bending the arc portions on both sides in a straight line with the main body portion and bending it in three dimensions.

  As the tape-shaped superconducting wire of the present invention, a high-temperature superconducting wire such as a bismuth system is preferably used and accommodated in a required refrigerant container.

  The superconducting coil of the present invention is composed of a single pancake coil or a double pancake coil.

  As described above, in the superconducting coil in which the tape-shaped superconducting wire of the present invention is wound, the edge surface of the tape is perpendicular to the coil axis, and the edge surface is in the perpendicular direction. In the portion where the three-dimensional bent portion that is bent and inclined is provided, the three-dimensional bent portion is provided by tilting the superconducting wire in the required length range while twisting the superconducting wire in the radial direction. A deformed superconducting coil having a three-dimensional bent portion can be easily obtained without causing deterioration or damage to the wire.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of the superconducting coil of the present invention.
As shown in FIG. 1, the superconducting coil 10 is a saddle type coil in which a tape-like superconducting wire 11 is wound along the outer peripheral surface of a winding frame 25 and laminated.

  That is, the opposing straight scale portion is a main body portion 12 (12-1, 12-2), and a short portion continuous to the left and right of the main body portion 12 is raised in the same direction. -2). When the coil axis direction L is the vertical direction, the main body 12 is curved with a large curvature in the length direction in the horizontal direction perpendicular to the coil axis direction L.

The tape-shaped superconducting wire 11 forming the superconducting coil 10 is made of a bismuth-based high-temperature superconducting wire, and has an edge surface 11x narrowed at both ends in the width direction (W direction) of the wide surface 11y continuous in the length direction. have. The superconducting coil 10 is a single pancake type coil.
A double pancake type coil may be used.

  The main body 12 is wound with the edge surface 11x perpendicular to the coil axis direction L. The pair of three-dimensional bent portions 13 that connect the left and right ends of the main body portion 12 are continuous between the main body portion 12 and between the pair of front and rear twist sections 13a and 13b that rise while tilting, and between the pair of front and rear twist sections 13a and 13b. It consists of the connection part 13c made to continue.

  In the twisted sections 13a and 13b of the left and right three-dimensional bent portions 13, as shown in FIG. 2 (A), the wide surface 11y of the superconducting wire 11 is shown in FIG. 2 (B) in a state parallel to the coil axial direction L. In this way, it is laid on the outer peripheral side, and is tilted upward from the main body portion 12 while being twisted with a coil axis direction L and an angle θ, and is started up three-dimensionally. At the upper end side of the torsion sections 13a and 13b, as shown in FIG. 2 (C), it gradually rises from the state of being laid on the outer peripheral side. In the connecting portion 13c that connects the upper ends of the twist sections 13a and 13b, as shown in FIG. 2D, the wide surface 11y is returned to the same vertical state as that in FIG. It extends in the circumferential direction with curvature.

Specifically, it is inclined upward while twisting so as to lie down from the main body 12-1 to the outer peripheral side in the twist section 13a, and as it approaches the upper end, it rises from the outer peripheral side to the inner peripheral side and shifts to the connecting part 13c. At the connecting portion 13c, the edge surface 11x is parallel to the axial direction L, and when it reaches the upper end of the twisted section 13b, it is inclined downward while lying on the outer peripheral side, and rises from the outer peripheral side to the inner peripheral side as it approaches the lower end side. It continues to the main body 12-2.
When the superconducting wire 11 is wound along the winding frame 25 and laminated on the outer peripheral side, in the twisted sections 13a and 13b, FIGS. 2B and 2C are bent at a bending angle θ with respect to the coil center axis L. The layers are stacked while being inclined parallel to the central axis Z. Therefore, as shown also in FIG. 3, the edge surfaces S2 of the torsion sections 13a and 13b are the edge surfaces S1 of the main body portions 12 (12-1 and 12-2) and perpendicular to the coil axis direction L and the connecting portions 13c. It will spread from the edge surface S3.

In this manner, angle conversion is performed between the main body 12 and one end side of the twisted portions 13a and 13b, and angle conversion is performed between the other end of the twisted portions 13a and 13b and the continuous portion 13c.
That is, the end surface S1 in which the edge surface 11x is stacked in the main body 12 is a horizontal direction that is perpendicular to the coil axis direction L and 90 degrees, and the edge surface 11x (S2) in the twisted portions 13a and 13b is in the coil axis direction L. In contrast, the edge 11 surface x (S3) is substantially perpendicular to the coil axis direction L at the connecting portion 13c.

  In the present embodiment, the lengths of the twisted portions 13a and 13b on both sides of the three-dimensional bent portion 13 are about 90 mm, and the twisted portions 13a and 13b are inclined from the main body portion 12 and the angle θ raised is 45 degrees. As the setting, the superconducting wire 11 is twisted to prevent the superconducting wire 11 from being deteriorated and damaged.

The saddle-shaped superconducting coil 10 is manufactured by a manufacturing apparatus shown in FIGS.
In the manufacturing apparatus, shaping tables 31 and 32 for forming a three-dimensional bent portion are placed on both sides of a winding work table 30. These shaping bases 31 and 32 are made into the base shape provided with the inclination parts 31a and 32a on the upper surface.
Further, a winding frame 25 around which the superconducting wire 11 is wound is provided by resin molding, and the winding frame 25 is formed in a saddle shape in a completed state shown in FIG. That is, the reel 25 has a shape including long portions 25a and 25b facing each other and three-dimensional forming portions 25c and 25d that are continuous on the left and right sides of the long portions. The three-dimensionally formed portion 25c is made to correspond to the inner periphery of the right-side three-dimensional bent portion 13-1, and the three-dimensionally formed portion 25d is made to correspond to the inner periphery of the left-side three-dimensional bent portion 13-2. In addition, the long portions 25a and 25b are curved in the horizontal direction.

The winding frame 25 is placed on the winding work table 30, and the three-dimensional forming portions 25c and 25d are arranged on the inclined upper surfaces 31a and 32a of the shaping tables 31 and 32, and are placed in a stable state.
The superconducting wire 11 is wound with the outer circumferential surface of the winding frame 25 in contact with the wide surface 11y, and in the three-dimensional forming portions 25c and 25d of the winding frame 25 placed on the shaping tables 31 and 32, the winding frame 25 When wound along the outer peripheral surface, as described above, the wide surface 11y is twisted so as to lie on the outer peripheral side. In this twisted state, the surfaces of the shaping bases 31 and 32 are inclined. Therefore, the surfaces of the shaping tables 31 and 32 are inclined in the length direction in the twisted state, and the twist sections 13b and 13c are formed.

  As described above, in the twisted section 13a continuous to the main body 12-1, after tilting upward in the length direction while laying on the outer peripheral side, the upper end is raised to the inner peripheral side to the connecting portion 13c. And continue. The torsional section 13b is formed while gradually laying from the connecting portion 13c to the outer peripheral side, and then rising from the outer peripheral side to the inner peripheral side and continuing to the main body portion 12-2. Forming. The other three-dimensional bent portion 13-2 is formed in the same manner. And since the main-body parts 12-1 and 12-2 are wound along the elongate parts 25a and 25b of the winding frame 25, they are greatly curved in the horizontal direction.

After the superconducting wire 11 is wound around the winding frame 25, an adhesive resin is applied to the wound portion and cured.
Note that an adhesive resin is applied in advance to the outer surface of the superconducting wire 11, is bonded to the winding frame 25 in the step of winding along the winding frame 25, and is laminated on the outer peripheral surface of the superconducting wire 11 wound around the winding frame 25. In the step of winding, the superconducting wires 11 may be bonded together with an adhesive resin, and finally heat-cured.

  As described above, the three-dimensional bent portions 13-1 and 13-2 can be easily formed simply by winding the three-dimensional forming portions 25c and 25d provided on the winding frame 25. Since the three-dimensional bent portions 13-1 and 13-2 merely twist the superconducting wire 11, the superconducting wire 11 is not deteriorated or damaged.

  The superconducting coil 10 of the present embodiment has a superconducting coil 10A on the outer peripheral surface of an annular duct 31 through which charged particles of the accelerator pass, for example, in a medical synchrotron accelerator 30 as shown in FIG. In combination with 10B, it is used as an external fitting to form a magnetic field for causing a charged particle to draw a circular orbit.

Specifically, FIG. 5 (A) shows a part of an annular duct 31, and a superconducting coil 10A is arranged on the upper half circumference of the outer periphery of the duct 31, and a superconducting coil 10B is arranged on the lower half circumference. The duct 31 is surrounded by 10B.
As shown in FIG. 5 (B), one main body portion 12-1 of the superconducting coils 10A and 10B is arranged along the axial direction of the duct 31 and joined to each other, while the other main body portion 12-2 is also 180 in the same manner. At a position opposite to each other, they are joined together.
The same applies to the three-dimensional bent portions 13-1 and 13-2 at both ends in the length direction of the superconducting coils 10A and 10B. As shown in FIG. 5C, the three-dimensional bent portions 13-1 and 13-2 are arranged in the vertical direction. Arranged in combination.
Thus, by providing the three-dimensional bent portions 13 at both ends in the length direction of the superconducting coils 10A and 10B and combining the three-dimensional bent portions 13 up and down, the duct 31 can be passed between the superconducting coils 10A and 10B. it can.
Therefore, as shown in FIG. 5D, a plurality of pairs of superconducting coils 10A and 10B having the saddle shape can be continuously arranged on the outer peripheral surface of the annular duct 31 in the circumferential direction. .

FIG. 6 shows a second embodiment.
The superconducting coil 10-1 of the second embodiment is a saddle type coil similar to the superconducting coil 10 of the first embodiment, but is formed by twisting the entire three-dimensional bent portion 13, and the apexes of the torsion sections 13a and 13b are formed. At the apex 13c, the edge end surface S2-3 of the superconducting wire 11 is parallel to the coil axis direction L. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

FIG. 7 shows a third embodiment.
The superconducting coil 10-2 of the third embodiment is a modified racetrack type coil. The superconducting coil 10-2 is different from the first embodiment in that the long main body 12 (12-1, 12-2) is linear. Since other configurations are the same, the same reference numerals are given and description thereof is omitted.

  The superconducting coil of the present invention is particularly suitable for an accelerator that needs to be a saddle type coil. In addition, superconducting devices such as motors for driving automobiles, generators, transformers, superconducting power storage devices (SMES), etc. It is also suitably used for equipment.

The superconducting coil of 1st Embodiment of this invention is shown, (A) is a whole perspective view, (B) is a side view, (C) is a top view. (A) (B) (C) (D) is explanatory drawing which shows the formation method of a three-dimensional bending part. It is a top view of a three-dimensional bending part. A part of manufacturing apparatus of the superconducting coil of a 1st embodiment is shown, (A) is a sectional view and (B) is a top view. The usage example of the superconducting coil of 1st Embodiment is shown, (A) is a front view, (B) is AA sectional view, (C) is BB sectional drawing, (D) is the whole schematic. is there. It is a partial perspective view which shows 2nd Embodiment. It is a schematic plan view of 3rd Embodiment. (A) (B) (C) is drawing which shows a prior art example. (A) and (B) are drawings showing other conventional examples.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Superconducting coil 11 Superconducting wire 12 (12-1, 12-2) Main-body part 13 (13-1, 13-2) Three-dimensional bending part 13a, 13b Twist area 13c Connection part 25 Winding frame 30 Winding work platforms 31, 32 Shaping table

Claims (6)

A superconducting coil wound with a tape-shaped superconducting wire,
A body portion in which the coil axis direction is a perpendicular to the edge surfaces of both side edges of the superconducting wire;
A three-dimensional bent portion provided continuously with a part of the body portion in the circumferential direction;
The three-dimensional bent portion is formed by providing a torsion section that inclines in the length direction with respect to the main body portion while twisting the width direction surface of the superconductor with respect to the coil axis direction. Superconducting coil.   The three-dimensionally bent portion includes the torsional sections that are continuous with the main body portion on opposite sides in the circumferential direction, and rises from the main body portion in the torsional sections, and the continuous portion sandwiched between the torsional sections on both sides is in the coil axis direction 2. The superconducting coil according to claim 1, wherein the superconducting coil is perpendicular to the edge surface and curved in the circumferential direction to have an arc shape, and the connecting portion of the three-dimensional bent portion and the main body portion are not located on the same plane.   The whole of the three-dimensional bent part is provided as a torsional section continuous to the main body part, and is curved in a circumferential direction to have an arc shape, and the main body part and the apex of the arc shape are not located on the same plane. The superconducting coil described in 1.   The main body is bent in the circumferential direction on the same plane and the arcs on both sides are bent in three dimensions. The superconducting coil according to any one of claims 1 to 3, wherein the superconducting coil is a deformed racetrack-type coil that is raised.   The superconducting coil according to any one of claims 1 to 4, comprising a single pancake coil or a double pancake coil. A method of manufacturing a superconducting coil according to any one of claims 1 to 5,
On the worktable for winding the superconducting wire, a shaping table having an inclined surface on the surface is fixed at a position corresponding to the three-dimensional bending portion provided in the superconducting coil, and the winding frame is mounted, and A solid formation part is provided in advance on both sides, and the solid formation part of the winding frame is placed on the shaping table,
The superconducting wire to be wound is wound along the outer peripheral surface of the winding frame so that the coil axis direction is perpendicular to the edge surfaces of both side edges of the superconducting wire. A superconducting coil manufacturing method, wherein the superconducting coil is wound while being twisted while being inclined with respect to the coil axis direction.

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