JP2009123970A - Support frame for superconductive coil, and superconductive coil unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a support frame that can cool a superconductive coil also from the inner peripheral side, in a configuration that axial both end faces of a support frame for a superconductive coil are positioned by abutting them against the inner faces of a cooling container. <P>SOLUTION: A support frame is for a superconductive coil stored in a cooling container filled with a refrigerant. The support frame has a cylindrical shape so as to be arranged on the inner periphery of an annularly-wound superconductive wire while its axial both ends further protrude than axial both ends of the superconductive coil. The axial length of the support frame is set to a length that both axial end faces abut against the opposite inner faces of the cooling container. Cutout are formed on both ends. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a support frame for a superconducting coil and a superconducting coil unit, and more specifically, by improving the shape of the support frame, the superconducting coil formed by winding a superconducting wire around the support frame is efficiently cooled in a cooling vessel. To do.

Conventionally, in Japanese Patent Application Laid-Open No. 9-69430 (Patent Document 1) and the like, a winding frame for winding a superconducting wire to form a superconducting coil is provided. The superconducting coil winding frame is generally cylindrical, and both end faces of the ring in the axial direction are flat.
Since the superconducting coil needs to be cooled to a superconducting temperature of extremely low temperature, it is accommodated in a cooling container in which a refrigerant such as liquid nitrogen is stored.

Since the superconducting coil is positioned and held in the cooling container, both end surfaces 2a in the axial direction of the winding frame 2 of the superconducting coil are brought into contact with the opposing inner surface 1a of the cooling container 1, as shown in FIG. Thus, the superconducting coil 3 is positioned. Alternatively, as shown in FIG. 8B, the superconducting coil 3 is positioned by fitting the winding frame 2 on the inner peripheral wall 1b ′ of the annular cylindrical cooling vessel 1 ′.
However, as described above, when the superconducting coil 3 is positioned by bringing the annular end surface 2a of the winding frame 2 into contact with the inner surface of the cooling container, the refrigerant does not flow into the inner peripheral side of the winding frame 2, and the superconducting coil 3 There is a problem that the cooling efficiency is not good because it cannot be cooled from the inner peripheral side.
The present invention is not limited to a winding frame that directly winds a superconducting wire as described above, but a plurality of pancake-type superconducting coils are arranged side by side in the axial direction, and are integrally assembled to the winding frame of these superconducting coils through one support frame. Even in the laminated superconducting coil, there is a problem that the flow of the refrigerant to the inner peripheral side is blocked by the support frame.

JP-A-9-69430

  The present invention has been made in view of the above problems, and in the configuration in which both end surfaces in the axial direction of the support frame of the superconducting coil are in contact with the inner surface of the cooling container, the superconducting coil can be cooled from the inner peripheral side. The problem is to provide a supporting frame.

In order to solve the above problems, the present invention is a support frame for a superconducting coil housed in a cooling container filled with a refrigerant,
The support frame has a cylindrical shape arranged on the inner periphery of a superconducting wire wound in an annular shape, and protrudes from both ends in the axial direction of the superconducting coil,
The length of the support frame in the axial direction is set to a length in which both end surfaces in the axial direction are in contact with the opposing inner surfaces of the cooling vessel, and a notch is provided in both ends. A coil support frame is provided.

According to the support frame of the superconducting coil having the above-described configuration, the axial direction of the support frame with the superconducting coil positioned in the cooling container with both end surfaces in the axial direction of the support frame contacting the opposing inner surfaces of the cooling container A gap through which the coolant can pass can be provided between the both ends in the axial direction of the support frame and the inner surface of the cooling container by the notches provided at both ends.
As a result, when the superconducting coil is accommodated in the annular cylindrical cooling container shown in the conventional example, the refrigerant is placed on the inner peripheral wall of the cooling container disposed on the inner peripheral side of the support frame through the coolant circulation notch. And the superconducting coil can be cooled from the inner peripheral side by heat conduction through the inner peripheral wall.
Further, when the superconducting coil is accommodated in the box-shaped cooling container shown in the conventional example, the refrigerant can be caused to flow into the support frame through the notch, and the superconducting coil is also cooled from the inner peripheral side by the refrigerant. can do.
Thus, by providing a notch in the support frame, the superconducting coil can be cooled from the inner peripheral side, and the superconducting coil can be efficiently cooled.

The support frame is inserted into and penetrates the winding frames of a plurality of pancake coils arranged side by side in the axial direction, and protrudes from both ends in the axial direction of the arranged pancake coils.
Alternatively, the winding frame itself of one superconducting coil is used as the support frame.

The notches provided at both ends are preferably provided at opposite positions in the axial direction.
That is, since the part not provided with the notch is provided at the opposing position in the axial direction of the support frame, the part of the support frame that faces in the axial direction can be brought into contact with the inner surface of the cooling container, The superconducting coil can be positioned and held with a sufficient holding force.
In addition, although the axial positioning of the superconducting coil can be ensured by contacting both axial end surfaces of the support frame with the inner surface of the cooling container, if the radial positioning of the superconducting coil is insufficient, The superconducting coil may be positioned using a separate spacer.

It is preferable that a plurality of notches provided at both ends in the axial direction are provided at intervals in the circumferential direction, and the total length in the circumferential direction of the region where the notches are provided is equal to or less than half of the total circumferential length.
According to the above configuration, the notches are provided in a dispersed manner without being concentrated at one place in the circumferential direction of the support frame, and therefore, it is possible to prevent the positioning holding force to the cooling container by the support frame from being significantly reduced locally. Can do. Further, when the superconducting coil is accommodated in the annular cylindrical cooling container, the refrigerant can be brought into contact with the inner peripheral wall of the cooling container disposed on the inner peripheral side of the support frame in a wide range without any bias. And a superconducting coil can be cooled more efficiently.
Furthermore, since the total length in the circumferential direction of the region provided with the notches is set to be half or less of the total circumferential length, the positioning and holding force to the cooling container by the support frame is not significantly reduced.

It is preferable that a plurality of the notches are provided at intervals of 30 to 90 degrees in the circumferential direction.
The reason why the interval for providing the notches is 30 to 90 degrees is that if the angle is less than 30 degrees, a large number of notches are provided and the number of processing steps increases. This is because when the superconducting coil is accommodated in the container, the refrigerant cannot be brought into contact with the inner peripheral wall of the cooling container in a wide range.

Moreover, it is preferable that each notch is provided in the range of 30 to 90 degrees in the circumferential direction.
The reason why the notch is provided in the range of 30 to 90 degrees is that if the angle is less than 30 degrees, a large number of notches are provided and the number of processing steps increases. This is because the positioning / holding force is greatly reduced locally.

The present invention also provides a superconducting coil unit in which a superconducting coil having the support frame is accommodated in a cooling container.
The superconducting coil unit includes an inner peripheral wall disposed on an inner periphery of the support frame, an outer peripheral wall disposed on an outer peripheral side of the superconducting coil supported by the support frame, and the inner peripheral wall and the outer peripheral wall. It has both end side walls connecting both end edges in the axial direction,
Both end surfaces of the support frame in the axial direction are in contact with inner surfaces of both side walls of the cooling container to be fixed in a sandwiched manner.

In the superconducting coil unit having the above-described configuration, the refrigerant introduced to the outer peripheral side of the cooling container is caused to flow into the inner peripheral side of the support frame through the refrigerant circulation cutout.
Therefore, when the support frame is externally fitted in contact with the outer surface of the inner peripheral wall of the cooling container, the refrigerant flowing through the notches at both ends of the support frame is brought into contact with the inner peripheral wall of the cooling container to cool the inner peripheral wall. Then, the cooled cold of the inner peripheral wall can be conducted to the superconducting coil through the support frame to the inner peripheral side, and the inner peripheral side of the superconducting coil can be cooled.
On the other hand, if both ends of the support frame are abutted against and held by the opposite side walls of the cooling container and the inner peripheral surface of the support frame is not in contact with the inner peripheral wall of the cooling container, a gap is provided. The refrigerant can be introduced through the notch. The support frame can be efficiently cooled by the refrigerant introduced to the inner peripheral side, and the inner peripheral side of the superconducting coil can be cooled to the same extent as the outer peripheral side by the cold heat of the support frame.

Moreover, it is preferable that the superconducting coil provided with the support frame of the present invention is accommodated in a cooling container provided with an inner and outer tank.
Each of the inner and outer tanks includes an outer peripheral wall, an inner peripheral wall, and both end side walls, a superconducting coil and a refrigerant are accommodated in the inner tank, and the inner tank is surrounded by an outer tank via a vacuum heat insulating tank. When the heavy tank is used, it is possible to suppress the conduction of external heat to the refrigerant, and the cooling performance of the superconducting coil can be enhanced in combination with the action of conducting the refrigerant to the inner peripheral side of the superconducting coil disposed in the inner tank. .

Further, when the superconducting coil is a pancake coil laminated type, it is preferably used as a field side stator of a motor.
As described above, when the superconducting coil housed in the cooling container is used as the field side stator of the motor, the refrigerant flow port provided in the cooling container is provided on the outer peripheral wall that is easily connected to the piping, and the superconducting is provided in the cooling container. The refrigerant is supplied to the outer peripheral side of the coil, and as described above, the inner peripheral side of the superconducting coil is hardly cooled.
Therefore, a notch or the like is provided at the axial end of the inner peripheral frame of the superconducting coil that contacts both side walls of the cooling container, and the refrigerant is allowed to flow into the inner peripheral side of the superconducting coil so that the refrigerant directly contacts the inner peripheral wall. If the refrigerant is introduced into the gap between the support frame on the inner peripheral side of the superconducting coil and the inner peripheral wall, the inner peripheral side of the superconducting coil can be efficiently cooled.

As described above, according to the superconducting coil support frame of the present invention, the superconducting coil formed by winding the superconducting wire around the support frame is accommodated in the cooling container, and both end surfaces in the axial direction of the supporting frame are connected to the cooling container. With the superconducting coil in contact with the inner surface and positioned in the cooling container, the refrigerant is provided between the axial end edges of the support frame and the inner surface of the cooling container by the coolant circulation notches provided at the axial end edges of the support frame. It is possible to provide a gap through which it can pass.
Thus, in the case of an annular cylindrical cooling vessel, the coolant can be brought into contact with the inner peripheral wall of the cooling vessel through the notch, and the superconducting coil can be cooled also from the inner peripheral side by heat conduction through the inner peripheral wall.
Further, when both ends in the axial direction of the support frame abut against the inner surfaces of both side walls of the cooling container and a gap is provided between the support wall and the inner peripheral wall of the cooling container, the support frame is inserted through the notch. The refrigerant can be introduced into the inside, and the superconducting coil can be cooled from the inner peripheral side by the refrigerant, and the superconducting coil can be efficiently cooled.

Embodiments of the present invention will be described with reference to the drawings.
1 to 6 show a first embodiment of the present invention.
The support frame 10 (hereinafter referred to as the support frame 10) of the superconducting coil 21 of the present embodiment is a cylindrical support frame made of fiber reinforced resin (FRP) in which glass fiber is impregnated with epoxy resin. As shown in FIG. 2, the superconducting coil 21 has a plurality of double pancake-types (eight in the present embodiment) arranged in parallel in the axial direction, and one support frame is provided on the winding frame 25 of each double pancake. 10 is inserted into the through state to form a laminated type, and both ends of the support frame 10 in the axial direction protrude from both ends of the superconducting coil 21.

As shown in FIG. 1, the support frame 10 is provided with notches 10 b for circulating refrigerant at circumferential edges in both end edges 10 a in the axial direction X. As shown in FIG. 1 (A) and FIG. 1 (B), the notch 10b is provided in three at each edge 10a, and as shown in FIG. 1 (A) and FIG. 1 (C), The notch 10b provided on one end side and the notch 10b provided on the other end side are provided at positions facing each other in the axial direction X.
In the present embodiment, all the notches 10b have the same shape, the notches 10b are provided in a range of 60 degrees in the circumferential direction, and the notches 10b are spaced from the notches 10b by 60 degrees in the circumferential direction. The total length in the circumferential direction of the region provided with the notches 10b is half of the total circumferential length.
Moreover, the end surface 10c of the site | part which does not provide the said notch 10b among the both ends of the axial direction X of the support frame 10 is made into the flat surface orthogonal to the axial direction X, and all end surfaces 10c of one end side are provided on the same plane. In addition, the end surface 10c on the other end side is also provided on the same plane.

The superconducting coil 21 is a double pancake coil formed by winding a strip-like bismuth-based oxide superconducting wire around a cylindrical winding frame in the axial direction as described above. It is a laminated coil in which superconducting wires are sequentially connected.
The pancake coil may be a single pancake coil. Further, the support frame 10 may be a winding frame, and a solenoid coil in which a superconducting wire is directly spirally wound around the outer peripheral surface of the support frame 10 may be used.

  The superconducting coil 21 is accommodated in a cooling container 22, and the cooling container 22 has an annular cylindrical shape. The cooling container 22 includes an inner tank 28 in which a superconducting coil 21 and a refrigerant composed of liquid nitrogen are accommodated, and an outer tank 29 in which the inner tank 28 is accommodated via a vacuum heat insulation layer S. Contains a multilayer insulation film (not shown) made of aluminum. Both the inner tank 28 and the outer tank 29 are made of stainless steel.

As shown in FIG. 2, the inner tank 28 includes a cylindrical inner peripheral wall 28 a fitted inside the support frame 10, a cylindrical outer peripheral wall 28 b disposed on the outer peripheral side of the superconducting coil 21, an inner peripheral wall 28 a and an outer periphery. Both end edges in the axial direction of the wall 28b are connected to each other, and both end walls 28c are formed in annular flat plate shapes disposed on both sides in the axial direction of the superconducting coil 21, and the edges are connected by welding.
The length of the support frame 10 in the axial direction X is set to a length where both end surfaces 10c in the axial direction are in contact with the opposing inner surfaces of the both end side walls 28a. Therefore, the superconducting coil 21 is positioned in the cooling vessel 22 by fitting the support frame 10 to the inner peripheral wall 28 a and bringing both end faces 10 c in the axial direction X into contact with the inner faces of the both end side walls 28 c of the inner tank 28. In addition, a gap G is provided between the side walls 28 c of the inner tank 28 and the support frame 10 by a coolant circulation notch 10 b provided in the support frame 10. Through this gap G, the inner peripheral wall 28a of the inner tank 28 is exposed to the inside of the inner tank 28 so that the refrigerant directly contacts the inner peripheral wall 28a.

  Further, columnar columnar spacers 30 made of copper are disposed between both axial end surfaces of the superconducting coil 21 and inner surfaces of both end side walls 28 c of the inner tank 28. The columnar spacers 30 are arranged at positions facing the notches 10b of the support frame 10 with an interval of 120 degrees in the circumferential direction, and the positioning of the superconducting coil 21 is reinforced by the columnar spacers 30.

On the other hand, as shown in FIG. 2, the outer tub 29 includes a cylindrical inner peripheral wall 29 a disposed with a gap on the inner peripheral side of the inner peripheral wall 28 a of the inner tub 28, and an outer peripheral side of the outer peripheral wall 29 a of the inner tub 28. A cylindrical outer peripheral wall 29b disposed with a gap between the inner peripheral wall 29a and the outer peripheral wall 29b in the axial direction both ends, and an annular ring disposed with a gap between the both end side walls 28c of the inner tank 28. It consists of flat side walls 29c and is connected by welding.
Further, as shown in FIG. 2, a spacer 31 is disposed between the inner tank 28 and the outer tank 29, and the inner tank 28 is positioned and held in the outer tank 29.

  One end side of the inner pipe 61 and the outer pipe 62 of the pipe 60 is connected to the outer peripheral walls 28b and 29b of the cooling container 22, and the other end side is connected to a refrigerant tank 50 (shown in FIGS. 3 and 4) for storing refrigerant. The refrigerant is supplied to the outer peripheral side of the superconducting coil 21 in the inner tank 28.

  As described above, the field coil (superconducting coil) 21 fitted on the support frame 10 is accommodated in the inner tank 28 of the cooling container 22, and both axial end faces 10 c of the support frame 10 are connected to the inner tank 28 of the cooling container 22. The superconducting coil 21 is positioned in the cooling container 22 in contact with the inner surfaces of both end side walls 28c. In this state, the refrigerant flowing from the pipe 60 attached to the outer peripheral wall 28b of the inner tank 28 flows into the inner peripheral side of the support frame 10 through the notches 10b at both ends of the support frame 10. Therefore, the refrigerant can be brought into contact with the inner peripheral wall 28a of the cooling container 22 disposed on the inner periphery of the support frame 10, and the superconducting coil 21 can be cooled from the inner peripheral side by heat conduction through the inner peripheral wall 28a. .

  Further, since the notches 10b of the support frame 10 are provided uniformly in the circumferential direction of the support frame 10, the coolant can be evenly contacted with the inner peripheral wall 28a of the cooling container 22 in the circumferential direction, and the notch 10b is wound. Since it is provided in a range where the strength of the frame does not decrease, the superconducting coil 21 can be positioned in the cooling container 22 with a sufficient holding force.

The superconducting coil unit 26 in which the superconducting coil 21 supported by the support frame 10 is accommodated in the cooling container 22 is used as a field side stator of the superconducting motor 100 as shown in FIGS.
The superconducting motor 100 passes through an armature-side rotor (hereinafter referred to as a rotor) 40 rotatably in a hollow portion of a field-side stator (hereinafter referred to as a stator) 20 provided with a superconducting coil 21, The stator 20 is a claw pole type motor in which an inductor is provided.

The stator 20 is formed by combining the superconducting coil unit 26 and a first yoke 23 and a second yoke 24 respectively disposed at both ends in the axial direction X of the superconducting coil unit 26.
Inductors 23c and 24c for forming magnetic poles are provided on the inner peripheral sides of the first and second yokes 23 and 24, and the rotor 40 is provided with a gap in a hollow portion surrounded by the inductors 23c and 24c. The inductors 23c and 24c are alternately arranged on the outer periphery of the rotor 40 at equal intervals in the circumferential direction.
In the present embodiment, two rotors 20 are arranged side by side in the axial direction X, and are fitted into and supported by an outer peripheral housing 43 made of a cylindrical body.

The cooling container 22 of the superconducting coil unit 26 is connected to the refrigerant tank 50 via the pipe 60 as described above.
The refrigerant tank 50 includes an inner tank 51 in which refrigerant is stored, and an outer tank 52 in which the inner tank 51 is accommodated via a vacuum heat insulating layer S. The inner tank 51 and the outer tank 52 are connected by welding at the upper end position. The upper surface opening of the interior 51 is attached with a lid 53.

The piping 60 connects the inner tank 61 of the cooling container 22 and the inner tank 51 of the refrigerant tank 50, connects the outer tank 29 of the cooling container 22 and the outer tank 52 of the refrigerant tank 50, and connects the inner pipe 61. An outer tube 62 is provided that surrounds the vacuum heat insulating layer S, and the inner tube 61 and the outer tube 62 are provided with bellows-shaped portions 61a and 62a to give elasticity.
The vacuum heat insulating layer S of the refrigerant tank 50 and the vacuum heat insulating layer S of the pipe 60 also contain a multilayer heat insulating sheet made of aluminum and resin.

Further, a strength holding tank holding tube 63 is fitted on the pipe 60, and a flange 63 b provided at the upper end of the tube portion 63 a of the tank holding tube 63 is provided at the bottom wall portion of the outer tank 52 of the refrigerant tank 50. The flange 63c provided at the lower end is bolted to the upper surface side of the outer peripheral housing 43 fitted on the field side stator 20. The refrigerant tank 50 is positioned and held above the motor body via the tank holding cylinder 63.
Further, the terminal material 27 connected to the superconducting coil 21 protrudes into the refrigerant tank 50 through the pipe 60 and is drawn into the refrigerant tank 50 through a through hole (not shown) provided in the lid 53 of the refrigerant tank 50. A lead wire (not shown) is connected to the terminal member 27.

The first yoke 23 and the second yoke 24 that are externally fitted to the cooling container 22 are made of iron.
As shown in FIG. 6, the first and second yokes 23 and 24 are annular flat plate-shaped side end wall portions 23 a and 24 a disposed at positions facing both end surfaces of the superconducting coil 21 in the axial direction. The outer peripheral wall portions 23b and 24b projecting from the outer peripheral edge of the side end wall portions 23a and 24a and surrounding the outer peripheral side of the superconducting coil 21, and the claw-shaped inductor protruding from the inner peripheral edge of the side end wall portions 23a and 24a 23c and 24c.
The inductors 23c and 24c are trapezoidal in shape with a width increasing from the front end to the base end, curved in the circumferential direction and disposed between the inner peripheral surface of the superconducting coil 21 and the outer peripheral surface of the rotor 40. The shape follows the surface with a gap.
Two inductors 23c of the first yoke 23 project from the left and right opposing positions, while two inductors 24c of the second yoke 24 project from the upper and lower opposing positions to connect the first and second yokes 23 and 24 to each other. When externally fitted to the cooling container 22 from both sides in the axial direction, as shown in FIG. 4B, the inductor 23c of the first yoke 23 and the inductor 24c of the second yoke 24 are spaced by 90 degrees in the circumferential direction. Are arranged alternately.

Semicircular cutouts 23d and 24d for penetrating the pipe 60 are provided on the outer peripheral wall portions 23b and 24b of the first and second yokes 23 and 24 at the upper end position facing the inductor 24c of the second yoke 24. ing.
Further, axial insertion grooves 23f and 24f having bolt holes 23e and 24e for connecting and fixing are provided in the side positions of the first yoke 23 facing the inductor 23c.
The first yoke 23 and the second yoke 24 are attached to the insertion grooves 23f and 24f with the front end surfaces of the outer peripheral wall portions 23b and 24b attached to each other with the cooling container 22 sandwiched from both sides in the axial direction. The piece 32 is fitted and fixed by bolting.
The first and second yokes 23 and 24 may be formed of magnetic stainless steel.

The stators 20 </ b> A and 20 </ b> B arranged side by side are fitted and supported by the outer peripheral housing 43, and both side support members 41 are assembled to both ends of the outer peripheral housing 43 in the axial direction. The both-side support member 41 includes a cylindrical peripheral wall portion 41a and a circular side wall portion 41b that closes the outer end surface of the peripheral wall portion 41a in the axial direction X. The shaft portions 40a on both sides in the axial direction of the rotor 40 are rotatably supported via bearings 42 in through holes 41c provided at the centers of the side wall portions 41b on both sides.
Further, a blade portion 40 b constituting a cooling fan is projected from the shaft portion 40 a of the rotor 40, and the blade portion 40 b is disposed in the superconducting motor 10.
The rotor 40 is provided with an armature coil (not shown) made of copper wire, a brush (not shown) is fixed to the support member 41, and a commutator (not shown) is fixed to the shaft portion of the rotor 40. 2) in contact with each other, and a current flows through the armature coil of the rotor 40.

  In the superconducting motor 100 having the above-described configuration, when a direct current is passed through the field coil, the first yoke 23 disposed at one end in the axial direction of the field coil is magnetized to, for example, the N pole, and is induced by the inductor 23c of the first yoke 23. N poles are formed. On the other hand, the second yoke 24 arranged at the other end is magnetized to the south pole, and the south pole magnetic pole is formed by the inductor 24 c of the second yoke 24. As a result, a field-side magnetic pole is formed in which N-pole magnetic poles and S-pole magnetic poles are alternately arranged in the circumferential direction.

When a direct current is supplied to the rotor 40, an N pole is formed in the armature coil facing the inductor 23c of the first yoke 23, which is the N pole, and an inductor 24c of the second yoke 24, which is the S pole. The S pole is formed in the armature coil that is opposed to the rotor arm 40, so that a rotational force is generated in the rotor 40 and the rotor 40 rotates.
When the rotor 40 rotates, the blade portion 40b provided on the shaft portion 40a also rotates, and heat generated by driving the superconducting motor 10 can be efficiently radiated to the outside.
In this embodiment, the armature coil is formed of a copper wire (normal conducting wire), but the armature coil may be formed of a superconducting wire.

  In the above-described superconducting motor, notches are provided at both ends of the support frame 10 of the superconducting coil 21 serving as a field coil, the refrigerant is circulated on the inner peripheral side of the superconducting coil 21, and the refrigerant is brought into contact with the inner peripheral wall 28a of the cooling container 22. Therefore, the inner peripheral side of the superconducting coil 21 can be efficiently cooled, and the performance of the superconducting coil 21 can be improved.

FIG. 7 shows a second embodiment of the present invention.
In the present embodiment, a superconducting coil 21 ′ formed by winding a superconducting wire around a support frame 10 similar to the first embodiment is a superconducting coil unit 26 ′ accommodated in a box-shaped cooling vessel 22 ′.
In the present embodiment, the support frame 10 is used as a winding frame, and a solenoid coil is formed by spirally winding a superconducting wire around the outer peripheral surface of the support frame 10.

  The cooling vessel 22 ′ includes a box-shaped inner tank 28 ′ in which a superconducting coil 21 ′ and a refrigerant composed of liquid nitrogen are accommodated, and a box-shaped outer tank in which the inner tub 28 ′ is accommodated via a vacuum heat insulating layer S. 29 ', and the vacuum heat insulating layer S accommodates a multilayer heat insulating film (not shown) made of aluminum. Both the inner tub 28 'and the outer tub 29' are made of stainless steel. Further, a spacer 31 ′ is disposed between the inner tank 28 ′ and the outer tank 29 ′ so that the inner tank 28 ′ is positioned in the outer tank 29 ′. In addition, an inner pipe 61 ′ is connected to the inner tank 28 ′, while an outer pipe 62 ′ surrounding the inner pipe 61 ′ with a gap is connected to the outer tank 29 ′. The inner pipe 61 ′ and the outer pipe 62 are connected to each other. A refrigerant tank (not shown) is connected to the cooling container 22 ′ through a pipe 60 made of “.

Both end surfaces 10c in the axial direction X of the support frame 10 are brought into contact with the inner surfaces of both side walls 28c ′ of the inner tank 28 ′, and the superconducting coil 21 ′ is positioned in the axial direction X within the cooling vessel 22 ′. The coolant is caused to flow into the support frame 10 through the coolant circulation notch 10 b provided in the support frame 10.
Further, a spacer 33 is also disposed between the bottom wall 28d ′ of the inner tank 28 ′ of the cooling container 22 ′ and the support frame 10 to position the superconducting coil 21 ′ in the radial direction.

According to the said structure, a refrigerant | coolant can be poured in into the support frame 10 through the notch 10b for refrigerant | coolant distribution | circulation provided in the support frame 10, and superconducting coil 21 'can be cooled also from an inner peripheral side with this refrigerant | coolant. .
In addition, since another structure and an effect are the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The above-described embodiments are exemplifications in all points, and are not limited to these embodiments. The scope of the present invention is indicated by the scope of claims, and all modifications within the scope equivalent to the scope of claims are made. Is included.

  A superconducting coil formed by winding a superconducting wire around a winding frame of the present invention is used for a superconducting device such as a driving motor for automobiles, other generators, transformers, superconducting power storage devices (SMES), and the like. .

The winding frame of 1st Embodiment of this invention is shown, (A) is a perspective view, (B) is a top view, (C) is a front view. It is a principal part expanded sectional view which shows the state which accommodated the superconducting coil in the cooling container. It is a cross-sectional perspective view of a superconducting motor. (A) is sectional drawing of the axial direction of a superconducting motor, (B) is a schematic sectional drawing of the radial direction of a superconducting motor. It is a cross-sectional perspective view of a field side stator. It is a disassembled perspective view of a field side stator. It is drawing which shows 2nd Embodiment. (A) (B) is drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Support frame of superconducting coil 10b Notch for refrigerant distribution 10c Both end faces 20 Field side stator 21 Field coil (superconducting coil)
22 Cooling container 26 Superconducting coil unit 28 Inner tank 29 Outer tank 30 Columnar spacer 40 Armature side rotor 50 Refrigerant tank 60 Piping 100 Superconducting motor

Claims (6)

A superconducting coil support frame accommodated in a cooling container filled with a refrigerant,
The support frame has a cylindrical shape arranged on the inner periphery of a superconducting wire wound in an annular shape, and protrudes from both ends in the axial direction of the superconducting coil,
The length of the support frame in the axial direction is set to a length in which both end surfaces in the axial direction are in contact with the opposing inner surfaces of the cooling vessel, and a notch is provided in both ends. Coil support frame. The support frame is inserted into and penetrates the winding frames of a plurality of superconducting pancake coils arranged side by side in the axial direction, and protrudes from both ends in the axial direction of the arranged pancake coils,
Alternatively, the support frame for a superconducting coil according to claim 1, wherein the winding frame itself of one superconducting coil is used as the support frame.   The support frame for a superconducting coil according to claim 1 or 2, wherein the notches provided at both ends are provided at opposite positions in the axial direction.   A plurality of notches provided at both ends in the axial direction are provided at intervals in the circumferential direction, and the total length in the circumferential direction of the region in which the notches are provided is equal to or less than half of the total circumferential length. 4. A support frame for a superconducting coil according to any one of 3 above.   The superconducting coil support frame according to claim 4, wherein the plurality of notches are provided at intervals of 30 to 90 degrees in the circumferential direction. A superconducting coil comprising the support frame according to any one of claims 1 to 5 is housed in a cooling container,
The cooling container includes an inner peripheral wall disposed on the inner periphery of the support frame, an outer peripheral wall disposed on the outer peripheral side of the superconducting coil supported by the support frame, and both end edges in the axial direction of the inner peripheral wall and the outer peripheral wall. With both side walls to connect,
A superconducting coil unit characterized in that both end faces in the axial direction of the support frame are held in contact with inner faces of both end side walls of the cooling container.

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