JP2016149485A - Superconducting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a superconducting apparatus which inhibits heat intrusion into a superconducting coil.SOLUTION: A superconducting apparatus includes a superconducting coil, an inner tank container 1, an outer tank container 2 and a support member 3. The inner tank container 1 holds the superconducting coil. The outer tank container 2 is disposed at an outer side of the inner tank container 1. The support member 3 supports the inner tank container 1 on the outer tank container 2. The support member 3 is formed by a first material in which a first fiber 31 having heat conductivity lower than that of a first base material 32 is disposed in the first base material 32. The outer tank container 2 is formed by a second material in which a second fiber having heat conductivity higher than that of a second base material is disposed in the second base material.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a superconducting device, and more particularly to a superconducting device holding a superconducting coil inside a container.

  2. Description of the Related Art Conventionally, a superconducting device in which a superconducting coil configured by winding a superconducting wire is held inside a container is known (see, for example, JP-A-2013-222928). The container holding the superconducting coil includes, for example, an inner tank container holding the superconducting coil and an outer tank container arranged so as to surround the outer periphery of the inner tank container. In order to position the inner tub container with respect to the outer tub container, a support member is used which is disposed so as to contact both the inner tub container and the outer tub container.

JP2013-2222928A

  Here, as a material for the inner tank container, the outer tank container, and the support member for positioning the inner tank container with respect to the outer tank container, FRP (Fiber Reinforced Plastic) is used in order to obtain sufficient mechanical strength. There is a case.

  When FRP is used as a material for a container for holding a superconducting coil as described above, the heat from the outside to the superconducting coil is relatively high because the fiber (for example, glass fiber or carbon fiber) constituting the FRP has a relatively high thermal conductivity. Intrusion becomes a problem. In particular, when the heat insulating container is configured by substantially vacuuming the inner tank container and the outer tank container, the support member serves as a heat intrusion path from the outside. In order to counteract the influence of such heat penetration, a great amount of electric power is required to cool the superconducting coil during operation of the superconducting coil. Therefore, it has been required to suppress heat intrusion into the superconducting coil via the support member.

  Then, in order to solve the above subjects, it aims at providing the superconducting apparatus which can suppress the heat | fever penetration | invasion to a superconducting coil.

  A superconducting device according to an aspect of the present invention includes a superconducting coil, an inner tank container, an outer tank container, and a support member. The inner tank container holds the superconducting coil. The outer tank container is disposed outside the inner tank container. The support member supports the inner tank container with respect to the outer tank container. The support member includes a first material in which first fibers having lower thermal conductivity than the first base material are arranged in the first base material. An outer tank container contains the 2nd material by which the 2nd fiber whose heat conductivity is higher than the 2nd base material is arranged in the 2nd base material.

  According to the above, heat penetration into the superconducting coil via the support member can be suppressed.

It is the schematic which shows the cross section of the superconducting apparatus which concerns on this Embodiment. It is the schematic which shows the inside of the inner tank container and outer tank container of the superconducting apparatus which concerns on this Embodiment. It is a perspective view of the external appearance of the outer tank container shown in FIG. It is a schematic perspective view of the inner tank container and the outer tank container of the superconducting device according to the present embodiment. It is the schematic seen from the direction of the arrow V shown in FIG. It is the elements on larger scale of the area | region VI in FIG. It is the elements on larger scale which show the modification of the superconducting apparatus shown in FIGS. It is the elements on larger scale which show the other modification of the superconducting apparatus shown in FIGS. It is the schematic which shows another modification of the superconducting apparatus shown in FIGS. It is the schematic which shows another modification of the superconducting apparatus shown in FIGS. It is the elements on larger scale of the superconducting apparatus shown in FIG. It is a perspective schematic diagram of the member which comprises the superconducting apparatus shown in FIG. It is a perspective schematic diagram which shows the modification of a supporting member.

[Description of Embodiment of the Present Invention]
First, embodiments of the present invention will be listed and described.

  A superconducting device 100 according to one aspect of the present invention includes a superconducting coil 10, an inner tank container 1, an outer tank container 2, and a support member 3. The inner tank container 1 holds a superconducting coil 10. The outer tank container 2 is disposed outside the inner tank container 1. The support member 3 supports the inner tank container 1 with respect to the outer tank container 2. The support member 3 includes a first material in which first fibers 31 having a lower thermal conductivity than the first base material 32 are disposed in the first base material 32. The outer tub container 2 includes a second material in which second fibers having higher thermal conductivity than the second base material are arranged in the second base material.

  In this case, the support member 3 that connects the inner tank container 1 and the outer tank container 2 is formed of the first material having a relatively low thermal conductivity. Compared with the case where the support member 3 is made of the same material as the tank container 2, it is possible to suppress the heat from entering the inner tank container 1 via the support member 3. For this reason, the power consumption for cooling the superconducting coil 10 during operation of the superconducting coil 10 can be suppressed.

  In the superconducting device 100, the material constituting the first base material 32 and the second base material may be an epoxy resin, and the first fiber 31 may be a para-type aramid fiber. The second fiber may be at least one selected from the group consisting of glass fiber, polyethylene fiber, and polyparaphenylene benzoxazole fiber.

  In this case, since the para-type aramid fiber has a sufficiently low thermal conductivity and a sufficiently high strength, the support member 3 having a relatively low thermal conductivity and sufficient strength can be obtained. On the other hand, by using a material (FRP) in which the above-described fibers are arranged in an epoxy resin as the second material constituting the outer tub container 2, the thermal conductivity becomes relatively higher than that of the support member 3, and the outer Generation | occurrence | production of the temperature gradient in the tank container 2 can be suppressed. For this reason, generation | occurrence | production of the frost in the outer tank container 2 and generation | occurrence | production of the thermal stress resulting from a temperature gradient can be suppressed.

  In the superconducting device 100, the thermal conductivity of the support member 3 may be 0.07 W / m · K or more and 0.3 W / m · K or less, and the thermal conductivity of the outer vessel 2 is 0.35 W / m. It may be m · K or more and 54 W / m · K or less.

  In this case, heat intrusion into the superconducting coil 10 via the support member 3 can be sufficiently suppressed, and generation of frost and thermal stress in the outer tank container 2 can be sufficiently suppressed.

  In the superconducting device 100, the content of the first fiber 31 in the first material may be 30% by volume or more and 90% by volume or less, and the content of the second fiber in the second material is 30%. It may be not less than volume% and not more than 90 volume%.

  In this case, the support member 3 can have both a sufficiently low thermal conductivity and a sufficient strength. Moreover, also in the outer tank container 2, a relatively high thermal conductivity and sufficient strength can be achieved.

  In the superconducting device 100, the inner tank container 1 may include an inner tank corner. The outer tank container 2 may include an outer tank corner at a position facing the inner corner of the inner tank container. The support member 3 may be disposed between the inner tank corner and the outer tank corner.

  In this case, when the superconducting device 100 is assembled, the support member 3 can be easily positioned.

  In the superconducting device 100, the extending direction of the first fibers 31 in the support member 3 is such that the force applied to the support member 3 when the support member 3 supports the inner tank container 1 with respect to the outer tank container 2 is applied. The direction may intersect with the direction.

  In this case, since stress is applied to the support member 3 along the direction intersecting the extending direction of the first fibers 31 of the support member 3, stress is applied along the extending direction of the first fibers 31. As a result, the durability of the support member 3 can be increased.

  In the superconducting device 100, a plurality of support members 3 may be disposed so as to surround the inner tank container 1.

In this case, the inner tank container 1 can be stably supported with respect to the outer tank container 2.
In the superconducting device 100, the inner tank container 1 may be made of the same material as the outer tank container 2. In this case, when the superconducting coil 10 is cooled, it is possible to prevent the difference in deformation caused by the temperature change between the inner tank container 1 and the outer tank container 2 from becoming extremely large.

  In the superconducting device 100, the thermal conductivity of the inner tank container 1 may be higher than the thermal conductivity of the support member 3. Further, the thermal conductivity of the outer tub container 2 may be higher than the thermal conductivity of the support member 3. In this case, the occurrence of distortion or deformation due to the temperature distribution in the inner tank container 1 or the outer tank container 2 can be suppressed.

  In the superconducting device 100, the support member 3 may support the inner tank container 1 so as to be movable relative to the outer tank container 2. In this case, when a deformation caused by a temperature change occurs between the inner tank container 1 and the outer tank container 2, excessive stress is generated at the contact portion between the support member 3, the inner tank container 1 and the outer tank container 2. This can be suppressed.

[Details of the embodiment of the present invention]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. First, the configuration of the superconducting device according to the present embodiment will be described. 1 to 4 illustrate a case where the superconducting device according to the present embodiment is configured as a superconducting motor.

  Referring to FIG. 1, superconducting device 100 according to the present embodiment includes a superconducting motor having a configuration in which inner tank container 1 holding a superconducting coil is held inside outer tank container 2 via support member 3. The rotor 40 is a rotor and the stator 50 is a stator disposed around the rotor 40. The rotor 40 includes a rotating shaft 118 extending in a major axis direction perpendicular to the paper surface of FIG. 1, a rotor shaft 116 connected to the rotating shaft 118 and disposed around the rotating shaft 118, and an outer surface of the rotor shaft 116. And four permanent magnets 120 arranged at equal intervals. The outer surface of the rotor shaft 116 has an arc shape in cross section. The permanent magnets 120 arranged at equal intervals in the circumferential direction of the outer surface of the rotor shaft 116 have a quadrangular cross-sectional shape. The permanent magnet 120 is arranged so as to extend along the extending direction of the rotating shaft 118 in a direction perpendicular to the paper surface of FIG. As the permanent magnet 120, for example, a neodymium magnet, a samarium magnet, a ferrite magnet, or the like can be used.

  Around the rotor 40, a stator 50 as a stator of the superconducting device 100 is disposed as shown in FIG. The stator 50 includes a stator yoke 121, a stator core 123 formed so as to protrude from the inner peripheral side of the stator yoke 121 toward the rotor 40, and the superconducting coil 10 disposed so as to surround the outer periphery of the stator core 123. And a cooling container 20 that holds the superconducting coil 10 therein.

  The stator yoke 121 is disposed so as to surround the outer periphery of the rotor shaft 116. The inner surface of the stator yoke 121 has an arcuate cross-sectional shape (cross-sectional shape in a plane perpendicular to the extending direction of the rotating shaft 118). Superconducting coil 10 is arranged along the arcuate inner surface of stator yoke 121. The cooling container 20 has an opening in a region located at the center of the superconducting coil 10 so that a part of the stator core 123 can be inserted. That is, the superconducting coil 10 is disposed so as to surround the outer periphery of the stator core 123.

  The cooling container 20 includes an inner tank container 1 that holds the refrigerant 117 and the superconducting coil 10 therein, and an outer tank container 2 that is disposed so as to surround the outer periphery of the inner tank container 1. A gap is provided between the outer tank container 2 and the inner tank container 1, and the inside of the gap is substantially in a vacuum state. That is, the cooling container 20 is a heat insulating container.

  From a different point of view, referring to FIG. 1, the superconducting device 100 stores the superconducting coil 10, holds the inner tank container 1 filled with the refrigerant 117, and the inner tank container 1 in a vacuum, It has a two-layer structure with an outer tank container 2 that forms a vacuum heat insulating layer around the outer periphery of the inner tank container 1. As a material of the inner tank container 1 and the outer tank container 2, for example, metal or FRP may be used, but it is particularly preferable to use FRP. When the material of the inner tank container 1 and the outer tank container 2 is FRP having electrical insulation, it is guided to the inner tank container 1 and the outer tank container 2 even when an alternating current is applied to the superconducting coil 10. The current does not flow to generate heat, and the cooling efficiency of the superconducting device 100 can be improved.

  Although the inner tank container 1 can employ any structure that allows the superconducting coil 10 immersed in the refrigerant 117 to be stored therein, as shown in FIGS. 1 to 3, the superconducting device 100 is configured as a superconducting motor. In this case, the inner tank container 1 and the outer tank container 2 that store the superconducting coil 10 constituting the stator 50 can be arranged in the stator 50. The stator 50 includes a stator yoke 121 and a stator core 123 formed so as to protrude from the inner peripheral side of the stator yoke 121 toward the rotor 40, and the superconducting coil 10 includes the outer periphery of the stator core 123 as described above. Can be arranged to surround. In the superconducting device 100 of FIG. 1, six superconducting coils 10 are arranged so as to surround the outer circumferences of the six stator cores 123, respectively. The stator core 123 is disposed outside the inner tank container 1 and the outer tank container 2.

  In FIG. 2, the schematic of the internal structure of the inner tank container 1 and the outer tank container 2 is shown. The inner tank container 1 can be configured to store the six superconducting coils 10 and to dispose the stator core 123 outside the inner tank container 1 in the hollow portion of each superconducting coil 10. At this time, the outer tank container 2 can be configured such that the inner tank container 1 and the outside of the outer tank container can be thermally insulated by vacuum. That is, the outer tank container 2 can support the inner tank container 1 in a state where the inside is kept in a vacuum. Thereby, the temperature control in the inner tank container 1 can be facilitated with respect to an external temperature change.

  As a member arranged so as to connect the inner tank container 1 and the outer tank container 2, for example, a current lead for electrically connecting the superconducting coil 10 and the outside of the outer tank container 2, the inner tank container 1 and Examples include a refrigerant pipe for circulating the refrigerant between the external refrigerator and a support member for defining a relative position between the inner tank container 1 and the outer tank container 2. Referring to FIG. 3, for example, at an end portion of the outer tub container 2, a terminal 41 electrically connected to the current lead and outer tubes 67 and 68 extending from the refrigerant pipe are disposed.

  At this time, the current lead and the cooling pipe are preferably configured so as to allow relative deformation of the inner tank container 1 or the outer tank container 2. This is because at the start of operation of the superconducting device 100, the inner tank container 1 is contracted by injecting a refrigerant into the inner tank container 1, and the outer tank container 2 is thermally expanded or contracted depending on a change in the environmental temperature outside the superconducting device 100. It is to do. Therefore, for example, it is preferable to employ a flexible pipe such as a bellows pipe as the cooling pipe. Further, it is conceivable to adopt a deformable connection structure for the connecting portion between the current lead and the inner tank container 1 or the outer tank container 2. In this case, the current lead and the cooling pipe do not have the strength and the configuration capable of supporting the inner tank container 1.

  As a result, the support member preferably has sufficient support strength even when the container is deformed as described above. Furthermore, since the support member can also be a path for heat penetration from the outside into the superconducting coil 10, it is preferable that the thermal conductivity be as low as possible. 4 to 7, in superconducting device 100 according to the present embodiment, support member 3 has a columnar shape, and conducts heat in the first base material more than the first base material. It is comprised by the 1st material by which the 1st fiber with a low rate is arranged. The first fiber is a para-aramid fiber. As the material constituting the first base material, any material having higher thermal conductivity than that of the first fiber can be used. For example, a resin, particularly an epoxy resin is used. The content rate of the 1st fiber in the supporting member 3 can be 30 volume% or more and 90 volume% or less. The lower limit of the content of the first fiber is preferably 40% by volume or more, more preferably 45% by volume or more, and the upper limit of the content of the first fiber is preferably 80% by volume or less, more preferably. 70% by volume or less.

  The support member 3 has a thermal conductivity of 0.07 W / m · K or more and 0.3 W / m · K or less. Furthermore, the thermal conductivity of the support member 3 is preferably 0.1 W / m · K or more and 0.25 W / m · K or less, more preferably 0.15 W / m · K or more and 0.2 W / m · K or less. is there. Thus, the support member 3 which has low heat conductivity with sufficient intensity | strength can be obtained by comprising the support member 3 by FRP containing a para-type aramid fiber.

  On the other hand, the outer tank container 2 is composed of a second material in which second fibers having higher thermal conductivity than the second base material are arranged in the second base material. The second fiber may be at least one selected from the group consisting of glass fiber, polyethylene fiber, and polyparaphenylene benzoxazole fiber. As the material constituting the second base material, any material having a lower thermal conductivity than the second fiber can be used. For example, a resin, for example, an epoxy resin that is the same resin as the support member 3 is used. That is, the outer tank container 2 may be configured by FRP as the second material. The content rate of the 2nd fiber in the 2nd material which comprises the outer tank container 2 can be 30 volume% or more and 90 volume% or less. The lower limit of the content of the second fiber is preferably 40% by volume or more, more preferably 45% by volume or more, and the upper limit of the content of the second fiber is preferably 80% by volume or less, more preferably. 70% by volume or less. The thermal conductivity of the outer tub container 2 is 0.35 W / m · K or more and 54 W / m · K or less. Furthermore, the thermal conductivity of the outer tank container 2 is preferably 0.5 W / m · K or more and 35 W / m · K or less. If it does in this way, generation | occurrence | production of the frost and thermal stress in the outer tank container 2 can be suppressed by enlarging the thermal conductivity of the outer tank container 2 to some extent. Further, the inner tank container 1 may be made of the same material as that of the outer tank container 2.

  Further, the support member 3 can support the inner tank container 1 and the outer tank container 2 so as to be relatively movable. Specifically, the support member 3 is disposed in a slidable contact with each of the inner tank container 1 and the outer tank container 2. The external appearance of the support member 3 is substantially cylindrical. The support member 3 is arranged such that its central axis (a central axis extending in the extending direction of the columnar support member 3) is along the direction toward the center of gravity of the inner tank container 1. Further, the support member 3 is arranged so that the central axis of the support member 3 is parallel to the sliding surfaces (surfaces in contact with the support member 3) of the inner tank container 1 and the outer tank container 2.

  Accordingly, the support member 3 is connected to the inner tank container 1 even when the inner tank container 1 is thermally contracted by injecting a refrigerant into the inner tank container 1 or when the outer tank container 2 is thermally expanded due to a change in environmental temperature. By supporting the outer tub container 2 so as to be relatively movable (slidable), it is possible to prevent the distortion accompanying the container deformation from being accumulated in the support member 3. Further, since the inner tank container 1 and the outer tank container 2 and the support member 3 are slidably in contact with each other without being fixed, the inner tank container 1 and the outer tank container 2 and the support member 3 are fixed. As in the case, it is possible to prevent the occurrence of the problem that the stress due to the heat shrinkage or the like is concentrated on the connection portion between the inner tank container 1 and the outer tank container 2 and the support member 3.

  Furthermore, the inner tank container 1 and the outer tank container 2 include a sliding surface that slides in contact with the support member 3, and the sliding surface is provided to extend toward the center of gravity of the inner tank container 1. Is preferred. For example, when the inner tank container 1 contracts, the contracting direction is a direction toward the center of gravity. At this time, if the sliding surface is formed along the direction toward the center of gravity, which is the direction in which the inner tank container 1 contracts, the inner tank container 1 and the support member 3 (and the outer tank container) along the sliding surface. 2) can be moved easily. As described above, by allowing the inner tank container 1 to be slidable with respect to the support member 3 and the outer tank container 2, accumulation of strain on the support member 3 can be effectively suppressed. In addition, the sliding surface of the inner tank container 1 and the outer tank container 2 may be directly formed on the inner tank container 1 and the surface of the outer tank container 2, or a separate body connected to one of the containers. It may be formed by a member (for example, the sliding surface member 5 shown in FIG. 5). In the embodiment of the present invention, the sliding surface formed by a separate member is also referred to as “the sliding surface of the inner tank container 1” if the separate member is connected to the inner tank container 1. If it is connected to the outer tank container 2, it is referred to as “the sliding surface of the outer tank container 2”.

  The support member 3 includes a corner (inner tank corner) of the inner tank container 1 and a corner (outer tank) of the outer tank container 2 across the sliding surfaces of the inner tank container 1 and the outer tank container 2. (Corner) can be provided at a position facing the corner. That is, the sliding surface can be provided so as to extend toward the center of gravity of the inner tank container 1 and at the opposite corners of the inner tank container 1 and the outer tank container 2. Thereby, a structure and an assembly method can be simplified rather than the case where a sliding surface is provided except for the corner | angular part of the inner tank container 1 and the outer tank container 2. FIG. At this time, there are two positions where the sliding surface can be configured as described above when the inner tank container 1 and the outer tank container 2 having the structure shown in FIGS. 1 to 5 are used.

  That is, one of the positions where the sliding surface can be arranged is a joint portion between the end surfaces 65 and 66 of the outer tank container 2 and the inner peripheral side wall of the outer tank container 2 with reference to FIGS. 4 and 5. 8 and FIG. 9, the other is an outer casing 64 of the outer tub container 2 and a side wall 71 of the opening for arranging the stator core 123 (see FIG. 1). It is a corner which is a junction.

  As the method of assembling the support member 3 when the support member 3 and the sliding surface are configured as shown in FIGS. 4 and 5, for example, the following method can be adopted. First, an inner tank container 1 and an assembled outer tank container 2 configured to have a vacuum heat insulation region around the outer periphery of the inner tank container 1 are prepared. At this time, both end surfaces 65 and 66 of the outer tub container 2 are not sealed. Next, the inner tank container 1 and the outer tank container 2 are erected with one end face of the outer tank container 2 as a bottom surface, and the support member 3 is attached to the inner peripheral corner of the inner tank container 1 on the top surface side. Deploy. Next, the sliding surface member 5 is disposed so as to form a sliding surface of the outer tank container 2 facing the sliding surface of the inner tank container 1 with the support member 3 interposed therebetween. After the sliding surface member 5 is disposed, the end surface (for example, the end surface 65 or the end surface 66) is sealed. At this time, the support member 3 may be fixed to one of the sliding surface of the inner tank container 1 or the sliding surface of the outer tank container 2. Further, the support member 3 can be assembled with the other end surface in the same manner.

  On the other hand, when the support member 3 and the sliding surface are configured as shown in FIGS. 8 and 9, for example, the following method can be used for assembling the support member 3. First, an inner tank container 1 and an assembled outer tank container 2 configured to have a vacuum heat insulation region around the outer periphery of the inner tank container 1 are prepared. At this time, the outer casing 64 of the outer tank container 2 is not sealed. Next, the inner tank container 1 and the outer tank container 2 are made upright with one end face of the outer tank container 2 as a bottom surface, and the outer peripheral casing 64 side of the outer tank container 2 and the center of gravity side corner (outer peripheral casing) of the superconducting device 100 The sliding surface member 5 is disposed at a corner portion which is a joint portion between the side wall 71 and the side wall 71. The sliding surface member 5 forms a sliding surface of the outer tank container 2 that faces the sliding surface of the inner tank container 1. For example, it is possible to use two semicircular sliding surface members 5 that form an annular shape when combined. Next, the support member 3 is disposed between the sliding surface of the inner tank container 1 and the sliding surface of the sliding surface member 5. After the support member 3 is arranged, the outer peripheral casing 64 of the outer tank container 2 is sealed. Also at this time, the support member 3 may be fixed to one of the sliding surface of the inner tank container 1 or the sliding surface of the outer tank container 2. Further, the support member 3 can be assembled with the other end surface in the same manner.

  In addition, although arbitrary materials can be employ | adopted as a material of the sliding surface member 5, Preferably, it is set as the material whose thermal expansion coefficient is equivalent to the outer tank container 2. FIG. Thereby, when thermal contraction or thermal expansion of the container as described above occurs, it is possible to suppress the generation of stress at the interface between the outer tank container 2 and the sliding surface member 5.

  The support member 3 preferably has a cylindrical shape as described above. In this case, it is preferable that the axial direction of the cylinder is provided in parallel with the sliding surface as described above and in a direction toward the center of gravity of the superconducting device 100. Referring to FIG. 7, support member 3 may have a spherical shape. Thereby, the contact area between the support member 3 and the inner tank container 1 and the outer tank container 2 can be suppressed to be small, and heat intrusion from the outer tank container 2 to the inner tank container 1 can be suppressed via the support member 3. .

  Furthermore, referring to FIGS. 6 and 7, the sliding surface may have a recess 4 that holds the support member 3. The recess 4 may be provided on at least one of the sliding surface of the inner tank container 1 and the sliding surface of the outer tank container 2. In accordance with the shape of the support member 3, the recess 4 does not prevent relative sliding of the inner tank container 1 and the outer tank container 2 in the direction of the center of gravity of the inner tank container 1, and in a slidable direction. On the other hand, the support member 3 can be provided so as not to move in the vertical direction. In particular, when the superconducting device according to one aspect of the present invention is applied to the superconducting motor as the superconducting device 100 as in the present embodiment, torque is applied to the inner vessel 1, but by providing the recess 4, the rotor shaft The relative positional shift of the inner tank container 1 with respect to the outer tank container 2 in the rotation direction of 116 can be suppressed.

  Further, as shown in FIGS. 10 to 12, an annular ring member 15 is arranged at the corner of the outer tank container 2 in order to arrange the plurality of support members 3 so as to surround the inner tank container 1 in an annular shape. May be. A plurality of convex portions 16 are formed on the inner peripheral side of the ring member 15 at intervals. The sliding surface member 5 is arranged on the surface of the convex portion 16. Support members 3 are respectively disposed on the sliding surface member 5. The support member 3 is in contact with the sliding surface of the inner tank container 1 on the side opposite to the side in contact with the sliding surface member 5. By using such a ring member 15, the support member 3 can be easily assembled. Further, from the viewpoint of facilitating the assembly, the sliding surface member 5 and the support member 3 may be joined by an adhesive member or the like. 1 to 9, the support member 3 may be joined to at least one of the sliding surface on the inner tank container 1 side or the sliding surface on the outer tank container 2 side.

  Moreover, as shown in FIG. 11, in the supporting member 3, the extending direction of the 1st fiber 31 (para-type aramid fiber) arrange | positioned in the 1st preform | base_material 32 is as follows. A direction that intersects the direction in which the force applied to the support member 3 is applied when 1 is supported with respect to the outer tank container 2 (that is, from the sliding surface of the inner tank container 1 to the sliding surface of the outer tank container 2). It is preferable that the direction intersects with the direction toward. Here, for example, the first fibers 31 may be arranged concentrically so as to go around the central axis of the support member 3. If it does in this way, compressive stress will be applied to the direction which cross | intersects the surface of the 1st fiber 31, and it will be a support member rather than the case where compressive stress is applied from the direction along the extension direction of the 1st fiber 31. 3 durability can be improved.

  The support member 3 may have a cylindrical shape or a spherical shape as described above, but may have a rectangular parallelepiped shape as shown in FIG. In this case, the support member 3 is arranged so that the first surface 33 of the support member 3 is in contact with the sliding surface of the outer tank container 2 and the second surface 34 is in contact with the sliding surface of the inner tank container 1. can do. The first surface 33 or the second surface 34 may be joined to the sliding surface of the outer tank container 2 or the inner tank container 1. Further, as long as the first surface 33 and the second surface 34 are formed, the surface of the other part of the support member 3 may be a curved surface instead of a flat surface. The shape of the support member 3 can be any shape such as a cylindrical shape, a spherical shape, or a rectangular parallelepiped shape as described above. Moreover, in the supporting member 3 shown in FIG. 13, the 1st fiber may be arrange | positioned so that it may extend in the direction along the 1st surface 33 (in layer form).

  The first base material of the support member 3 may be a resin other than epoxy, for example, a thermoplastic resin such as PEEK (polyether ether ketone), PPS (polyphenylene sulfide), 66 nylon, or the like. In that case, the support member 3 may be produced by molding by injection molding, and the first fiber may be a filler-like para-aramid short fiber. The second base material of the outer tub container 2 may be a resin other than epoxy, for example, a thermoplastic resin such as PEEK, PPS, 66 nylon. In that case, the outer tub container 2 may be produced by molding by injection molding, and the second fibers may be filler-like glass short fibers, polyethylene short fibers, and polyparaphenylene benzoxazole short fibers. .

  As described above, the superconducting device according to the present embodiment has a lower thermal conductivity than the material constituting the outer tank container 2 as the material constituting the support member 3 that supports the inner tank container 1 with respect to the outer tank container 2. Since the material (specifically FRP containing para-type aramid fiber) is used, a supporting member having sufficient strength to hold the relative position between the inner tank container 1 and the outer tank container 2 3 and the penetration of heat from the outer tank container 2 to the inner tank container 1 side through the support member 3 can be effectively suppressed.

  Moreover, in the superconducting apparatus mentioned above, by providing the support member which supports the inner tank container 1 and the outer tank container 2 so that sliding is possible, a deformation | transformation of a support member can be suppressed and the strength reduction of a support member can be suppressed. Furthermore, the sliding surfaces of the inner tank container 1 and the outer tank container 2 extend in the direction of the center of gravity of the inner tank container 1, so that the support member, the inner tank container 1, the outer tank container 2, etc. Application of stress can be suppressed.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims, and is intended to include meanings equivalent to the scope of claims and all modifications within the scope.

  The superconducting device of the present invention is particularly advantageously applied to, for example, a superconducting motor.

DESCRIPTION OF SYMBOLS 1 Inner tank container 2 Outer tank container 3 Support member 4 Concave part 5 Sliding surface member 10 Superconducting coil 15 Ring member 16 Convex part 20 Cooling container 31 First fiber 32 First base material 40 Rotor 50 Stator 64 Outer casing 65, 66 End surfaces 67, 68 Outer pipe 71 Side surface 116 Rotor shaft 117 Refrigerant 118 Rotating shaft 120 Permanent magnet 121 Stator yoke 123 Stator core

Claims (7)

A superconducting coil;
An inner vessel holding the superconducting coil;
An outer tank container disposed outside the inner tank container;
A support member for supporting the inner tank container with respect to the outer tank container,
The support member includes a first material in which a first fiber having a thermal conductivity lower than that of the first base material is disposed in the first base material,
The outer tub container is a superconducting device including a second material in which a second fiber having higher thermal conductivity than the second base material is disposed in a second base material. The material constituting the first base material and the second base material is an epoxy resin,
The first fiber is a para-aramid fiber,
2. The superconducting device according to claim 1, wherein the second fiber is at least one selected from the group consisting of glass fiber, polyethylene fiber, and polyparaphenylene benzoxazole fiber. The support member has a thermal conductivity of 0.07 W / m · K to 0.3 W / m · K,
The superconducting device according to claim 1 or 2, wherein the outer tank container has a thermal conductivity of 0.35 W / m · K or more and 54 W / m · K or less. The content of the first fiber in the first material is 30% by volume or more and 90% by volume or less,
The content rate of the said 2nd fiber in a said 2nd material is a superconducting apparatus of any one of Claims 1-3 which are 30 volume% or more and 90 volume% or less. The inner tank container includes an inner tank corner,
The outer tank container includes an outer tank corner at a position facing the inner tank corner of the inner tank container,
The superconducting device according to any one of claims 1 to 4, wherein the support member is disposed between the inner tank corner and the outer tank corner.   The extending direction of the first fibers in the support member intersects the direction in which the force applied to the support member is applied when the support member supports the inner tank container with respect to the outer tank container. The superconducting device according to any one of claims 1 to 5, which is a direction.   The superconducting apparatus according to any one of claims 1 to 6, wherein a plurality of the support members are arranged so as to surround the inner tank container.

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