JP2009170724A - Cooling vessel of superconductive coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently cool a superconductive coil housed in a ring-like cooling vessel from the inner peripheral side also. <P>SOLUTION: This cooling vessel wherein a superconductive coil formed by winding a superconductive wire is housed, and the superconductive coil is cooled to a superconductive temperature by an introduced cooling medium, is provided with an outer wall constituted of: a cylindrical inner peripheral wall arranged on the inner peripheral side of the superconductive coil; a cylindrical outer peripheral wall arranged on the outer peripheral side of the superconductive coil; and both annular end sidewalls continuing to both axial edges of the inner peripheral wall and the outer peripheral wall and arranged on both axial end surface sides of the superconductive coil. The outer wall is formed of a material having low thermal conductivity, and a thermally-conducting member formed of a material having thermal conductivity higher than those of the inner peripheral wall, the outer peripheral wall and both the end sidewalls is interposed between the inner peripheral wall and the superconductive coil. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cooling container that cools a superconducting coil to a superconducting temperature, and in particular, efficiently cools the inner peripheral side of the superconducting coil that is difficult to cool.

Conventionally, many cooling containers for cooling superconducting coils to cryogenic temperatures have been provided.
For example, as shown in FIG. 8, a cooling container 1 disclosed in Japanese Patent Laid-Open No. 6-283328 (Patent Document 1) includes a cylindrical inner peripheral wall 1a disposed on the inner peripheral side of a superconducting coil 2, and a superconducting Cylindrical outer peripheral wall 1b disposed on the outer peripheral side of coil 2 and both ends of the inner peripheral wall 1a and the outer peripheral wall 1b in the axial direction are connected to both ends of the superconducting coil 1 in the axial direction. It is made into the ring shape which consists of the side wall 1c. The superconducting coil 2 is fitted on the inner peripheral wall 1a of the cooling container 1, the superconducting coil 2 is accommodated in the cooling container 1, and the superconducting coil 2 is cooled by the refrigerant 3 made of liquid helium stored in the cooling container 1. It is configured.

JP-A-6-283328

When using the cooling container which consists of the cylindrical cylinder of patent document 1 as a stator of a motor, since it is difficult to supply a refrigerant | coolant in the cooling container from the inner peripheral wall 1a side used as the rotor side, it connects with an outer peripheral wall. Refrigerant is supplied from the piping.
Therefore, although the outer peripheral side of the superconducting coil 2 on the outer peripheral wall side is efficiently cooled by the refrigerant 3, the cold heat of the refrigerant 3 is hardly transmitted to the inner peripheral side of the coil, and there is a problem that the inner peripheral side of the coil is difficult to be cooled.

  In addition, the cooling container reduces the ingress of heat from the outside and reduces the rise in refrigerant temperature, so the cooling container is made of stainless steel, fiber reinforced resin (FRP), or the like having a low thermal conductivity. . Therefore, the cooling heat of the outer peripheral wall and both end walls cooled in contact with the refrigerant is not easily transmitted to the inner peripheral wall. Also from this point, the temperature of the inner peripheral wall 1a is not lowered than that of the outer peripheral wall and both end walls. There is a problem of poor cooling efficiency on the inner circumference side.

  This invention is made | formed in view of the said problem, and makes it the subject to make it possible to cool efficiently the superconducting coil accommodated in the ring-shaped cooling container also from the inner peripheral side.

In order to solve the above-mentioned problems, the present invention provides, as a first invention, a cooling container that contains a superconducting coil formed by winding a superconducting wire and cools the superconducting coil to a superconducting temperature with the introduced refrigerant. And
A cylindrical inner peripheral wall disposed on the inner peripheral side of the superconducting coil, a cylindrical outer peripheral wall disposed on the outer peripheral side of the superconducting coil, and the axial ends of the inner peripheral wall and the outer peripheral wall in succession to the superconducting coil. An outer wall composed of annular both end side walls disposed on both end surface sides in the axial direction of the coil;
While the outer wall is formed of a material having low thermal conductivity,
A cooling container for a superconducting coil is provided, wherein a heat conducting member made of a material having a higher thermal conductivity than the inner peripheral wall, the outer peripheral wall, and both end side walls is interposed between the inner peripheral wall and the superconducting coil. is doing.

In the cooling container having the above-described configuration, the outer peripheral wall, the inner peripheral wall, and both end side walls are formed of a material having low thermal conductivity. Therefore, it is possible to suppress external heat conduction and suppress an increase in internal refrigerant temperature. On the other hand, a heat conductive member having high thermal conductivity is interposed between the inner peripheral wall and the superconducting coil on the inner peripheral side, which is hard to be cooled from the outer peripheral side of the superconducting coil, and superconducting heat from the heat conductive member that is efficiently cooled by the refrigerant is superconducting. Heat can be conducted to the inner circumference of the coil, and the inner circumference side of the superconducting coil can be cooled to the same extent as the outer circumference side.
Further, when the outer wall of the cooling container is formed of the same material, the inner peripheral wall, the outer peripheral wall, and both end side walls, which are the outer walls, can be fixed and assembled by welding.

  It is preferable that the outer wall including the outer peripheral wall, the inner peripheral wall, and both end side walls is made of, for example, stainless steel, while the heat conducting member is made of, for example, copper.

Further, as a second invention, a superconducting coil formed by winding a superconducting wire is housed, and a cooling container for cooling the superconducting coil to a superconducting temperature with an introduced refrigerant,
A cylindrical inner peripheral wall disposed on the inner peripheral side of the superconducting coil;
A cylindrical outer peripheral wall disposed on the outer peripheral side of the superconducting coil;
An annular both end side wall disposed on both end surface sides in the axial direction of the superconducting coil continuously with the both end edges in the axial direction of the inner peripheral wall and the outer peripheral wall;
The material for forming the inner peripheral wall is a material having higher thermal conductivity than the material for forming the outer peripheral wall and both side walls, and
A cooling container is provided as a cooling container for a superconducting coil, wherein the thickness of the inner peripheral wall is larger than the thickness of the outer peripheral wall and the side walls on both ends.

In the cooling container of the second invention, the inner peripheral wall is formed of a material having a high thermal conductivity without using the heat conducting member of the first invention.
Thus, when the inner peripheral wall is formed of a material having good thermal conductivity, the inner peripheral wall can be efficiently cooled by the refrigerant, and the cold heat of the inner peripheral wall can be efficiently transmitted to the inner peripheral side of the superconducting coil. The inner peripheral side can be cooled to the same extent as the outer peripheral side.

On the other hand, since the inner peripheral wall is formed of a material having better thermal conductivity than the outer peripheral wall and both end walls, the temperature easily rises due to heat from the outside. Therefore, the influence of external temperature is reduced by increasing the thickness of the inner peripheral wall.
Specifically, it is preferable that the thickness of the inner peripheral wall is 5 to 10 mm, and the thickness of the outer peripheral wall and both side walls is 1 to 5 mm.

In the case of the above configuration, it is preferable that the outer peripheral wall and both end side walls are made of stainless steel, for example, while the inner peripheral wall is made of copper, for example.
And the said both end side wall and inner peripheral wall which consist of different forming materials are adhere | attached by brazing or soldering.

  A refrigerant flow port is provided in the outer peripheral wall, and a gap serving as a refrigerant passage is formed between the outer peripheral wall and the inner surfaces of the both end side walls and the superconducting coil, and the heat conducting member or inner member formed of the material having a high thermal conductivity. It is preferable that the refrigerant is in contact with the peripheral wall.

In the case where the superconducting coil accommodated 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.
Further, the superconducting coil housed in the cooling container is positioned and held with both ends in the length direction of the inner peripheral frame of the superconducting coil abutting against the opposite side walls of the cooling container. Alternatively, the superconducting coil is positioned and held by fitting the inner peripheral frame of the superconducting coil to the inner peripheral wall. As a result, the refrigerant introduced into the cooling container from the refrigerant circulation port provided in the outer peripheral wall does not directly contact the inner peripheral wall on the inner peripheral side of the superconducting coil and the heat conducting member, and these are hardly cooled.
Therefore, a notch or the like is provided at the end in the length direction of the inner peripheral frame of the superconducting coil in contact with both side walls of the cooling container, and the refrigerant is caused to flow into the inner peripheral side of the superconducting coil, so that the heat conducting member or It is preferable that the refrigerant is brought into direct contact with the inner peripheral wall.
Alternatively, the length of the inner peripheral frame of the superconducting coil is set to a length that does not abut against both end faces of the cooling container, a refrigerant flow path to the inner peripheral side is secured, and the inner peripheral frame is fitted on the inner peripheral wall of the cooling container. It is preferable that the refrigerant is brought into direct contact with the heat conductive member or the inner peripheral wall by holding or holding the heat conductive member on the inner peripheral wall.
As described above, when the refrigerant is brought into direct contact with the heat conducting member or the inner peripheral wall, the cooling can be efficiently performed, and the inner peripheral side of the superconducting coil can be cooled to the same extent as the outer peripheral side.

The superconducting coil accommodated in the cooling container of the present invention can be suitably used as a field side stator of a motor. In that case, a container that accommodates the superconducting coil and the refrigerant inside the outer wall composed of the outer peripheral wall, the inner peripheral wall, and both side walls is an inner tank, and includes an outer tank that surrounds the inner tank via a vacuum heat insulating tank, And,
The superconducting coil is preferably a laminated type in which a plurality of pancake coils are arranged side by side in the axial direction, and the inner tank and the outer tank are preferably annular cylinders having a shape similar to the outer shape of the superconducting coil as the laminated type.

  As described above, in the superconducting coil cooling container of the present invention, in order to increase the cooling efficiency on the inner peripheral side that is hard to be cooled from the outer peripheral side of the superconducting coil, in the first invention, the thermal conductivity is provided on the inner periphery of the superconducting coil. Since a high heat conduction member is disposed, the inner circumference side of the superconducting coil can be cooled to the same degree as the outer circumference side in order to efficiently conduct cold heat to the inner circumference side of the superconducting coil through the heat conduction member. it can. And since the inner peripheral wall, outer peripheral wall, and both end side walls of the cooling container are formed of a material having low thermal conductivity, the thermal influence due to the external temperature can be reduced, and the rise in the refrigerant temperature can be suppressed.

  In the second invention, instead of using the heat conducting member of the first invention, the inner peripheral wall of the cooling vessel itself is formed of a material having high thermal conductivity, and the cooling efficiency of the inner peripheral wall is increased. It is possible to cool the inner peripheral side of the superconducting coil facing the same as the outer peripheral side. And since the thickness of the inner peripheral wall which made this heat conductivity high is enlarged, the thermal influence by external temperature can be reduced.

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 first embodiment is applied to the superconducting motor 10 using the superconducting coil 21 accommodated in the cooling container 22 as a field coil of the stator of the motor, and the superconducting motor is suitably used as a driving motor for an automobile or the like. Is.

First, the configuration of the superconducting motor 10 shown in FIGS. 4 to 6 will be described. An armature side rotor (hereinafter abbreviated as a rotor) is formed in a hollow portion of a field side stator (hereinafter abbreviated as a stator) 20. ) 40 penetrates freely.
The stator 20 includes a superconducting coil 21 made of a double pancake coil housed in a cooling container 22, and a first yoke 23 and a second yoke 24 arranged at both ends in the axial direction of the superconducting coil 21. 1. Inductors 23c and 24c are provided on the inner periphery of the second yokes 23 and 24 to form a claw pole type motor. In the present embodiment, two stators 20 are arranged side by side in the axial direction.

  The superconducting coil 21 as the field coil of the stator 20 is formed by laminating a plurality of double pancakes obtained by winding a strip-shaped bismuth oxide superconducting wire in a cylindrical shape on a cylindrical support frame 26 in parallel in the axial direction. In addition, it has an annular shape (that is, a cylindrical shape) that is long in the axial direction. In the present embodiment, eight double pancake coils are arranged side by side in the axial direction, and adjacent double pancake superconducting wires are sequentially connected to form a laminated coil. Terminals 27 (first terminal 27A and second terminal 27B) for connecting to the lead wires are connected to both ends of the continuous superconducting wire via solder, and these terminals 27 are laminated superconducting members. The coils 21 are disposed at both ends in the axial direction.

  The superconducting coil 21 is housed in a cooling container 22, and the first yoke 23 and the second yoke 24 disposed on both ends in the axial direction of the superconducting coil 21 housed in the cooling container 22 form a magnetic pole on the inner peripheral side. A pair of children 23c, 24c are provided so as to face each other in the diameter direction. An inductor 23c that passes through the rotor 40 rotatably with a gap in the hollow portion surrounded by the inductors 23c and 24c, and forms an N pole at an interval of 90 degrees in the circumferential direction on the outer periphery of the rotor 40. And inductors 24c serving as S poles are alternately arranged.

Below, the cooling container 22 for cooling the superconducting coil 21 is demonstrated based on FIGS. 1-3.
The cooling container 22 is formed in a ring shape as shown in FIG. 2 and is a double tank composed of an inner tank 28 and an outer tank 29. The inner tank 28 contains a superconducting coil 21 and a refrigerant R made of liquid nitrogen. The inner tank 28 is surrounded by an outer tank 29 through a vacuum heat insulating layer S, and the vacuum heat insulating layer S contains a multilayer heat insulating film (not shown) made of aluminum.

  As shown in FIGS. 1 and 3, the inner tank 28 includes a cylindrical inner peripheral wall 28 a disposed on the inner peripheral side of the superconducting coil 21, and a cylindrical outer peripheral wall 28 b disposed on the outer peripheral side of the superconducting coil 21. The outer peripheral wall is composed of annular both end side walls 28c that connect both ends in the axial direction of the inner peripheral wall 28a and the outer peripheral wall 28b and are respectively disposed on both sides in the axial direction of the superconducting coil 21.

  A cylindrical heat conduction member 70 made of copper having a high thermal conductivity is interposed between the support frame 26 that externally fits the superconducting coil 21 and the inner peripheral wall 28a. The outer peripheral surface of the heat conductive member 70 is in contact with the inner peripheral surface of the support frame 26, and the heat conductive member 70 is fitted on the inner peripheral wall 28a. That is, the support frame 26 of the superconducting coil 21 is positioned and fixed by being externally fitted to the inner peripheral wall 28a with the heat conducting member 70 interposed.

  The length of the heat conducting member 70 in the axial direction is larger than the length of the support frame 26 of the superconducting coil 21, and both ends in the axial direction are brought into contact with the inner surfaces of both side walls 28. A gap C serving as a refrigerant flow path is provided between both ends in the longitudinal direction of 26 and the inner surfaces of both end side walls 28 c so that the refrigerant directly contacts the heat conducting member 70.

The inner peripheral wall 28a, the outer peripheral wall 28b, and the both end side walls 28c constituting the outer wall are made of stainless steel having a lower thermal conductivity than copper and have the same thickness, and are 1 to 5 mm. The thickness of the heat conducting member 70 is 5 to 10 mm, which is larger than the thickness of the inner peripheral wall 38a.
These inner peripheral wall 28a, outer peripheral wall 28b, and both end side walls 28c are connected and assembled by welding.

  A slit 28d extending from one end to the other end in the axial direction is provided at the upper end position of the outer peripheral wall 28b, and a base wall portion 28e provided at the lower end edge of the inner tube 61 of the pipe 60 described later is provided at the edge portion of the slit 28d. It is attached by welding. As a result, the base wall portion 28e constitutes a part of the outer peripheral wall 28b, and the inner tube 61 protrudes upward from the upper end of the outer peripheral wall 28b, and the terminal connected to the field coil 21 on the inner tube 61 The material 27 is inserted.

  On the other hand, the outer tub 29 is disposed with a gap on the outer peripheral side of the outer peripheral wall 28b of the cylindrical inner peripheral wall 29a and the outer peripheral wall 28b of the inner tub 28 which are disposed with a gap on the inner peripheral side of the inner peripheral wall 28a of the inner tub 28. It consists of a cylindrical outer peripheral wall 29b and annular flat-plate-shaped end side walls 29c that connect both end edges in the axial direction of the inner peripheral wall 29a and the outer peripheral wall 29b and that are respectively disposed with a gap from the both end side walls 28c of the inner tank 28. All the outer tubs 29 are made of stainless steel, and the edges are connected by welding.

A slit 29d extending from one end to the other end in the axial direction is provided at the upper end position of the outer peripheral wall 29b, and a base wall portion 29e provided at the lower end edge of the outer tube 62 of the pipe 60 described later at the edge portion of the slit 29d. Are attached by welding. As a result, the base wall portion 29e forms a part of the outer peripheral wall 29b, and the outer tube 62 protrudes upward from the upper end of the outer peripheral wall 29b, and the inner tube 61 is spaced from the outer tube 62 by a gap. It is inserted.
An annular 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.

As shown in FIGS. 4 and 5, a refrigerant tank 50 that stores the refrigerant R supplied to the cooling container 22 via a pipe 60 is connected to the cooling container 22.
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 the 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 is surrounded by a vacuum heat insulating layer, and the inner tube 61 and the outer tube 62 are provided with bellows-shaped portions 61a and 62a to give elasticity.
A multilayer heat insulating sheet (not shown) made of aluminum is also accommodated in the vacuum heat insulating layer S of the refrigerant tank 50 and the vacuum heat insulating layer of the pipe 60.

  Further, a strength holding tank holding cylinder 63 is fitted on the pipe 60, and a flange 63 b provided at the upper end of the cylinder portion 63 a of the tank holding cylinder 63 is bolted to the bottom wall portion of the outer tank 52 of the refrigerant tank 50. At the same time, the flange 63c provided at the lower end is bolted and fixed 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.

  In addition, the first and second terminal members 27A and 27B connected to the superconducting coil 21 at both ends of the superconducting wire are inserted into the pipe 60 and protruded into the refrigerant tank 50, and the through holes provided in the lid 53 of the refrigerant tank 50 are provided. A lead wire (not shown) drawn into the refrigerant tank 50 is connected to the terminal member 27 through a hole (not shown).

  As shown in FIG. 2, as described above, the first and second yokes 23 and 24 are arranged on both end sides in the axial direction of the superconducting coil 21 accommodated in the cooling vessel 22, and the side end face portions 23a and 24a thereof are arranged. The outer peripheral wall portions 23b and 24b projecting from the outer peripheral edge of each other are abutted to surround the cooling container 22. Semi-circular cutouts 23d and 24d for penetrating the pipe 60 to the upper end positions of the first and second yokes 23 and 24 facing the inductor 24c of the second yoke 24 are provided on the outer peripheral wall portions 23b and 24b. Provided.

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.

As shown in FIGS. 4 to 6, the stators 20 </ b> A and 20 </ b> B arranged side by side are fitted and supported by an 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 10 using the superconducting coil 21 housed in the cooling container 22 as a field side stator, when a direct current is passed through the field coil composed of the superconducting coil 21, the superconducting coil 21 is arranged at one end in the axial direction. One yoke 23 is magnetized to the N pole, and an N pole magnetic pole is formed by the inductor 23 c of the first yoke 23. The second yoke 24 disposed 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 claw pole type magnetic path in which N-pole magnetic poles and S-pole magnetic poles are alternately arranged in the circumferential direction is formed.

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 opposed to the rotor arm 40, so that a rotational force is generated in the rotor 40 and the armature side rotor 40 rotates.
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.

When the superconducting coil 21 is housed in the cooling container 22 described above, the support frame 26 on the inner peripheral side of the superconducting coil 21 is in contact with the heat conducting member 70, so that the heat conducting member 70 cooled by the refrigerant is cooled. Can be efficiently conducted to the inner peripheral side of the superconducting coil 21 through the support frame 26.
On the other hand, since the inner peripheral wall 28a, outer peripheral wall 28b, and both end side walls 28c of the inner tank 28 of the cooling container 22 are formed of stainless steel having low thermal conductivity, it is possible to suppress heat conduction at the external temperature to the internal refrigerant. it can.
Furthermore, since the cooling container 22 is a double tank, a vacuum heat insulating layer is provided between the outer tank 29 and the inner tank 28, and the outer tank 29 is also formed of stainless steel having a low thermal conductivity. The outside temperature is not easily conducted inside, and the temperature rise of the refrigerant can be suppressed and kept at the superconducting temperature.

FIG. 7 shows a second embodiment of the present invention.
In the second embodiment, without using the heat conduction member 70 of the first embodiment, the inner peripheral wall 28a of the inner tub 28 of the cooling vessel 22 is formed of copper having a high thermal conductivity, and the thickness of the inner peripheral wall 28a is changed. It is thicker than the outer peripheral wall 28b and both end side walls 28c formed of stainless steel having low thermal conductivity.
Specifically, the thickness of the inner peripheral wall 28a is 5 to 10 mm, and the thickness of the outer peripheral wall 28b and both end side walls 28c is 1 to 5 mm.
In addition, since both end side walls 28c connected to the inner peripheral wall 28a are made of different materials, they are connected by brazing or soldering.

The support frame 26 on the inner periphery of the superconducting coil 21 is externally fitted and held on the inner peripheral wall 28a, and a gap C through which refrigerant flows on the inner surfaces of both ends of the conductive coil 21 and the support frame 26 in the axial direction and both side walls 28c. The refrigerant is in direct contact with the inner peripheral wall 28a.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

Also in the cooling container 22 configured as described above, when the inner peripheral wall 28a is cooled by the refrigerant, the cold heat can be efficiently conducted to the inner periphery of the superconducting coil 21 via the support frame 26. The inner peripheral side can be cooled to the same extent as the outer peripheral side.
Moreover, the thermal influence of external temperature can be reduced by making the thickness of the inner peripheral wall 28a large.

  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.

  The cooling container of the present invention is suitably used as a container for cooling a superconducting coil used in a motor for driving a motor vehicle, other superconducting equipment such as a generator, a transformer, and a superconducting power storage device (SMES).

It is sectional drawing of the cooling container of 1st Embodiment of this invention. It is a disassembled perspective view of a field side stator. It is a disassembled perspective view of a field coil and a cooling vessel. It is a cross-sectional perspective view of a superconducting motor. It is sectional drawing of a superconducting motor. It is a cross-sectional perspective view of a field side stator. It is sectional drawing of the cooling container of 2nd Embodiment. It is drawing which shows a prior art example.

Explanation of symbols

10 Superconducting motor 20 Field side stator 21 Superconducting coil (field coil)
22 Cooling container 26 Support frame 28 Inner tank 28a Inner peripheral wall 29 Outer tank 40 Armature side rotor 50 Refrigerant tank 60 Pipe 70 Heat conduction member

Claims (4)

A cooling container that accommodates a superconducting coil formed by winding a superconducting wire and cools the superconducting coil to a superconducting temperature with an introduced refrigerant,
A cylindrical inner peripheral wall disposed on the inner peripheral side of the superconducting coil, a cylindrical outer peripheral wall disposed on the outer peripheral side of the superconducting coil, and both axial edges of the inner peripheral wall and the outer peripheral wall in succession to the superconducting coil. An outer wall composed of annular both end side walls disposed on both end surface sides in the axial direction of the coil;
While the outer wall is formed of a material having low thermal conductivity,
A cooling container for a superconducting coil, wherein a heat conducting member made of a material having a higher thermal conductivity than the inner peripheral wall, the outer peripheral wall, and both end side walls is interposed between the inner peripheral wall and the superconducting coil. A cooling container that accommodates a superconducting coil formed by winding a superconducting wire and cools the superconducting coil to a superconducting temperature with an introduced refrigerant,
A cylindrical inner peripheral wall disposed on the inner peripheral side of the superconducting coil, a cylindrical outer peripheral wall disposed on the outer peripheral side of the superconducting coil, and both axial edges of the inner peripheral wall and the outer peripheral wall in succession to the superconducting coil. An outer wall composed of annular both end side walls disposed on both end surface sides in the axial direction of the coil;
The material for forming the inner peripheral wall is a material having higher thermal conductivity than the material for forming the outer peripheral wall and both side walls, and
A cooling container for a superconducting coil, wherein the inner peripheral wall is thicker than the outer peripheral wall and both end side walls.   A refrigerant flow port is provided in the outer peripheral wall, and a gap serving as a refrigerant passage is formed between the outer peripheral wall and the inner surfaces of the both end side walls and the superconducting coil, and the heat conducting member or inner member formed of the material having a high thermal conductivity. The cooling container for a superconducting coil according to claim 1 or 2, wherein a refrigerant is brought into contact with the peripheral wall. The superconducting coil is used as a field side stator of a motor,
A container that contains the superconducting coil and the refrigerant inside the outer wall composed of the outer peripheral wall, the inner peripheral wall, and both side walls is an inner tank, and includes an outer tank that surrounds the inner tank via a vacuum heat insulating tank, and
The superconducting coil is a laminated type in which a plurality of pancake coils are arranged in the axial direction, and the inner tank and the outer tank are annular cylinders having a shape similar to the outer shape of the superconducting coil as the laminated type. The superconducting coil cooling container according to claim 3.

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