JP5516665B2 - Superconducting coil device, superconducting device, and method of manufacturing superconducting coil device - Google Patents

Description

  The present invention relates to a superconducting coil device and a superconducting device, and more particularly to a superconducting coil device including a container that holds a superconducting coil inside, and a superconducting device using the superconducting coil. Moreover, it is related with the manufacturing method of the said superconducting coil apparatus.

  A superconducting coil wound with a superconducting wire is used at an extremely low temperature. For this reason, for example, in a superconducting device such as a motor using a superconducting coil, the superconducting coil is used while being held inside the container. The superconducting coil is used in a cooled state by supplying a coolant such as liquid nitrogen into the container.

  As a method for manufacturing an inner tank of a cryostat that holds a superconducting coil while storing a cryogenic refrigerant therein as in the container described above, for example, it has been conventionally disclosed in JP-A-2007-35835 (Patent Document 1). Such a method is used.

JP 2007-35835 A

  The manufacturing method of the cryostat disclosed in Japanese Patent Laid-Open No. 2007-35835 is as follows. First, a frame body made of fiber reinforced plastic called FRP (Fiber Reinforced Plastics) whose strength is increased by thermosetting a material in which a reinforcing fiber such as glass fiber or carbon fiber is impregnated with a thermosetting resin is prepared. An uncured substance called a prepreg made of the same material as FRP is attached to this frame. And the prepreg is formed as a side surface of a container by thermosetting the frame to which this prepreg is attached. In this way, the inner tank of the cryostat is formed.

  A container that holds a cryogenic refrigerant such as a cryostat is required to be made of a material that can withstand thermal expansion and contraction caused by a temperature cycle between room temperature and cryogenic temperature. Resins that do not contain reinforcing fibers do not have sufficient strength to withstand such temperature cycles. Therefore, the container is preferably formed using a material in which a resin such as FRP is reinforced with a fiber material. In addition, by using a non-conductor such as FRP as a material for a container, it is possible to suppress the occurrence of a phenomenon in which current flows through the container and Joule heat is generated to heat the refrigerant inside the container.

  However, when using a method in which a plurality of layers of prepregs are attached to the outside of the frame as in the manufacturing method disclosed in Japanese Patent Application Laid-Open No. 2007-35835, affixing is performed particularly in regions where the structure of the frame is stepped. The shape of the step of the frame to which the prepreg to be attached cannot be followed, and especially in the vicinity of the corner formed by the step of the frame, the prepreg does not contact the frame and a gap is formed between the prepreg and the frame. Is done. Since air or the like is likely to be stored in the gap, when the temperature cycle is added to the container in which the gap exists, the stored air gives thermal stress to the surrounding casing. As a result, breakage such as cracks may occur in the container starting from the corner.

  The present invention has been made in view of the above problems. The purpose is to improve the filling accuracy between the frame constituting the container of the superconducting coil and the resin material constituting the side surface, thereby providing a superconducting coil device including a container capable of improving the sealing performance, and It is to provide a superconducting device using a superconducting coil device.

The superconducting coil device according to the present invention is a superconducting coil device including a superconducting coil and a container that holds the superconducting coil inside. The container includes a base body configured by connecting a plurality of members, and a sealing reinforcement portion formed along a connecting portion between the plurality of members in the base body.
The superconducting coil device according to the present invention is a superconducting coil device including a superconducting coil and a container for holding the superconducting coil inside. The container is made of FRP, and a sealing reinforcing portion made of resin is formed along the corner at the corner of the container.

  The superconducting coil device according to the present invention has a corner portion of a container that holds the superconducting coil inside (a “corner” bent in a mountain shape when viewed from the resin-impregnated side, or a valley shape when viewed from the resin-impregnated side. The bent “corner”) is filled with a sealing reinforcement made of resin. For this reason, it is suppressed that a space | gap is formed in the connection part of the member of the some frame body assembled in order to comprise a container, such as a corner | angular part. Therefore, the sealing performance of the container can be improved. Even when the container is subjected to a temperature cycle, the container can be prevented from being damaged due to a large thermal stress generated in the gap between the corners.

It is a schematic diagram which shows the state of the external appearance of the superconducting apparatus which concerns on embodiment of this invention. It is a schematic sectional drawing in line segment II-II of FIG. FIG. 3 is a schematic perspective view of the rotor of FIGS. 1 and 2. FIG. 3 is a schematic perspective view of the stator of FIGS. 1 and 2. It is a schematic perspective view which shows the structure of the inner tank container by which a superconducting coil is hold | maintained inside. It is a schematic perspective view which shows the structure of the outer tank container which surrounds the inner tank container of FIG. It is a schematic sectional drawing in the line segment VII-VII of FIG. It is an enlarged view which shows the aspect of the part which shows the inside of the inner tank container and the outer tank container which FIG. 2 shows in detail. FIG. 9 is a schematic enlarged view of a region surrounded by a round dotted line “IX” in FIG. 8. FIG. 8 is a schematic enlarged view of a region surrounded by a round dotted line “X” in FIG. 7. It is a flowchart for demonstrating the manufacturing process of the superconducting coil container which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each embodiment, elements having the same function are denoted by the same reference numerals, and the description thereof will not be repeated unless particularly necessary.

  An example of the superconducting device according to the present embodiment is a superconducting motor 100 shown in FIG. Superconducting motor 100 includes a rotor 30 used as a rotor and a stator 20 used as a stator. The superconducting motor 100 of FIG. 1 is a schematic diagram showing a schematic structure, but only a part of the members constituting the rotor 30 is shown for easy understanding of the drawing, and the members constituting the stator 20 are not shown. Yes. Each member constituting the rotor 30 and the stator 20 is specifically illustrated by the cross-sectional view of FIG. 2 and FIGS. The superconducting motor 100 will be described below with reference to FIGS. 1 to 6 as appropriate.

  The rotor 30 of the superconducting motor 100 causes a current to flow from outside to the rotor core 13 around which the superconducting wire is wound as the superconducting coil 10, and causes the rotor core 13 to be magnetized according to the direction of the current. The superconducting coil 10 is preferably in the form of a racetrack coil as shown in FIGS. 1, 3, and 4, for example. As for the stator 20, magnetism is generated in the stator core 23 according to the direction of the current flowing through the superconducting coil 10 around the stator core 23. The rotor 30 is rotated in the direction along the periphery of the rotor shaft 16 by utilizing the attraction and repulsion between the rotor core 13 and the stator core 23 due to magnetism. The rotation of the rotor 30 is propagated to the outside from the output shaft 18 connected to a load that outputs the rotation of the rotor 30. The rotation of the output shaft 18 is supported by the bearing 35.

  Here, since the superconducting coil 10 is composed of a superconducting wire, it needs to be cooled with a refrigerant 17 such as liquid nitrogen in order to operate it. Therefore, the superconducting coil 10 is held inside the container. By supplying the refrigerant 17 to the inside of the container, the superconducting coil 10 is cooled to be usable.

  The container here is a superconducting coil container that houses the superconducting coil 10. As shown in FIG. 2, the superconducting coil container includes an inner tank container 50 that directly holds the superconducting coil 10 inside, and an outer tank container 60 that is disposed so as to surround the outer periphery of the inner tank container 50. The superconducting coil device is formed by the configuration in which the superconducting coil 10 is held inside the inner tank container 50 and the outer tank container 60 is disposed so as to surround the outer peripheral portion of the inner tank container 50. The inner tank container 50 and the outer tank container 60 are provided in each superconducting coil 10 of the rotor 30 and the stator 20. The inner tank container 50 and the outer tank container 60 are not shown in FIGS.

  Since the container includes the inner tank container 50, the superconducting coil 10 can be cooled and stably operated. Moreover, since the said container is provided with the outer tank container 60, it has the effect | action as a heat insulation container which suppresses that the inner tank container 50 holding a refrigerant | coolant touches the external air which is room temperature.

  Therefore, it is preferable that the inner tank container 50 and the outer tank container 60 are made of a material excellent in heat insulation. As an example, these are preferably formed of FRP (fiber reinforced plastic). Since FRP has very high strength and heat insulation properties, the temperature difference between the inside and outside of the container, the damage caused by the thermal stress due to the temperature difference inside the container between when the superconducting motor 100 is used and when it is not used, The deterioration of the cooling efficiency of the superconducting coil 10 can be suppressed. However, instead of FRP, for example, filler-containing plastics or ceramics may be used as the inner tank container 50 and the outer tank container 60.

  FIGS. 5 and 6 show an inner tank container and an outer tank container used for the stator 20 as an example. As shown in FIG. 5, the inner tank container 50 is formed of, for example, an FRP housing having a cylindrical shape. The cylindrical portion of the inner tank container 50 has two cylindrical casings, an inner tank container outer casing 51 and an inner tank container inner casing 52, whose circular centers as the bottom surfaces of these cylindrical shapes are substantially coincident with each other. Arranged in a concentric circle. A region sandwiched between the inner tank container outer casing 51 and the inner tank container inner casing 52 is an area where the superconducting coil 10 is placed. In order for the stator core 23 and the rotor core 13 to pass through the hollow region of the superconducting coil 10, an opening 53 is provided on the side surfaces (side portions having a cylindrical shape) of the inner tank container outer casing 51 and the inner tank container inner casing 52. Is formed. In other words, the hollow portion of the superconducting coil 10, the stator core 23, and the rotor core 13 are disposed in each of the plurality of openings 53, and the superconducting wire of the adjacent superconducting coil 10 is disposed in a region sandwiched between the adjacent openings 53. It becomes.

  As shown in FIG. 5, the opening 53 is formed by forming, for example, a rectangular hole on both side surfaces of the inner tank container outer casing 51 and the inner tank container inner casing 52, so that the inner tank container outer casing is formed. From the body 51 to the inner tank container inner housing | casing 52, it was formed so that it might penetrate in the direction which cross | intersects a side surface. However, for example, when a rectangular hole is formed in only one of the inner tank container outer casing 51 and the inner tank container inner casing 52, for example, when viewed from the outside (inside) of the side surface of the inner tank container 50 In addition, the opening 53 may have a concave shape.

  The edge of the opening 53 is closed by the FRP as the opening side surface 54. Further, end casings 55 and 56 made of FRP having a flange shape are also arranged near the bottom surfaces (cylindrical ends) of the inner tank container outer casing 51 and the inner tank container inner casing 52. By the above, the area | region pinched | interposed into the inner tank container outer housing | casing 51 and the inner tank container inner housing | casing 52 turns into sealed space, and makes the aspect as the inner tank container 50. FIG. Here, for example, a refrigerant supply pipe and a refrigerant discharge pipe for supplying and discharging the refrigerant 17 such as liquid nitrogen (see FIG. 2) are connected. As shown in FIG. 5, two tubular members that circulate the refrigerant protrude from the end housing 55. Among these, one (tubular member 57) is a refrigerant supply pipe for supplying the refrigerant 17 to the inside of the inner tank container 50, and the other one (tubular member 58) is the refrigerant 17 from the inside of the inner tank container 50. It is a refrigerant supply pipe for discharging. However, since both have the same structure, both are here called a refrigerant supply pipe.

  On the other hand, the outer tank container 60 as the heat insulating container is disposed so as to surround the outer side of the inner tank container 50 as described above. Specifically, as shown in FIG. 2, an outer tub container outer casing 61 is placed outside the inner tub container outer casing 51 of the inner tub container 50 so as to face the inner tub container outer casing 51. The outer tank container inner casing 62 is placed inside the inner tank container inner casing 52 so as to face the inner tank container inner casing 52. The inner tank container 50 is placed in a region sandwiched between the outer tank container outer casing 61 and the outer tank container inner casing 62 (that is, inside the outer tank container 60). As shown in FIG. 6, a plurality of openings 63 are also formed in the outer tub container outer casing 61 and the outer tub container inner casing 62, and are arranged so as to overlap with the openings 53. In this manner, the hollow region of the superconducting coil 10, the stator core 23, and the rotor core 13 are arranged in the region where the opening 63 and the opening 53 are superimposed (see FIG. 2). An opening side surface 64 is also present at the edge of the opening 63, and the end housings 65 and 66 are arranged, whereby the inside of the outer tank container 60 forms a sealed space.

  That is, the circular diameter formed by the bottom surface of each container is the outer tub container outer casing 61, the inner tub container outer casing 51, the inner tub container inner casing 52, and the outer tub container inner casing 62 in the descending order. The part 63 is smaller than the opening 53.

  The inner tank container 50 and the outer tank container 60 are arranged so as not to contact each other with respect to the circular radial direction formed by the respective bottom surfaces. That is, as shown in FIG. 2, for example, there is a certain radial gap between the inner tank container outer casing 51 of the inner tank container 50 and the outer tank container outer casing 61 of the outer tank container 60. The same applies to the inner tank container inner casing 52 of the inner tank container 50 and the outer tank container inner casing 62 of the outer tank container 60. That is, the gap exists, for example, as the gap 21 shown in FIG. 2 and surrounds the outer periphery of the inner tank container 50. The presence of the gap 21 increases the efficiency of cooling the inside of the inner tank container 50 by the refrigerant 17 and suppresses the temperature inside the inner tank container 50 from being influenced by the room temperature outside the outer tank container 60, for example. doing. For this reason, it can be said that the outer tank container 60 acts as a heat insulating material that facilitates temperature control inside the inner tank container 50.

  And the outer tube | pipe shown in FIG. 6 is arrange | positioned at the outer tank container 60 so that the outer side of the tubular member 57 may be covered. An outer tube member 68 shown in FIG. 6 is disposed in the outer tub container 60 so as to cover the outside of the tubular member 58. Similarly to the tubular members 57 and 58, these two protrude from the end housing 65, and one of the two surrounds the outside of the tubular member 57 that supplies the refrigerant 17 to the inside of the inner tank container 50. And the other one surrounds the outside of the tubular member 58 that discharges the refrigerant 17 from the inside of the inner tank container 50. Here, a member surrounding the outside of the tubular member 57 is referred to as an outer tube member 67, and a member surrounding the outside of the tubular member 58 is referred to as an outer tube member 68. Here, both are referred to as an outer tube.

  Note that the opening 63 shown in FIG. 6 is similar to the opening 53 in that, for example, a rectangular hole is formed on both sides of the outer tub container outer casing 61 and the outer tub container inner casing 62, thereby It may be formed so as to penetrate from the tank container outer casing 61 to the outer tank container inner casing 62 in a direction intersecting the side surface. However, for example, when a rectangular hole is formed in only one of the outer tub container outer casing 61 and the outer tub container inner casing 62, for example, when viewed from the outside (inside) of the side surface of the outer tub container 60 In addition, the opening 63 may have a concave shape.

  As described above, the superconducting coil 10 is placed inside the inner tank container 50 of FIGS. The mode is as shown in the sectional view of FIG. And the terminal for supplying an electric current to the superconducting wire which comprises this superconducting coil 10 is connected. The mode is as shown in FIG. 7, and the terminal 41 includes a housing fixing terminal 43, a terminal constituting member 45, and a wire fixing terminal 47. In FIG. 7, for ease of formation, the terminal 41 is composed of three members, a housing fixing terminal 43, a terminal component member 45, and a wire fixing terminal 47, but the terminal 41 is a single member. You may be comprised from the member.

  The inner tank container outer casing 51 and the inner tank container inner casing 52 that form the inner tank container 50 are, as shown in FIG. 8, the base body 1 and the reinforcing fiber disposed so as to surround the outer periphery of the base body 1. 3. The same applies to the outer tub container outer casing 61 and the outer tub container inner casing 62 forming the outer tub container 60.

  Since the base body 1 is a frame that forms the framework of the inner tank container 50 and the outer tank container 60, as described above, the FRP that constitutes the inner tank container 50 and the outer tank container 60, or a filler-containing plastic or ceramics is used. It is preferable that it is comprised.

  Reinforcing the entire surface of the base body 1 (so as to wrap around the entire surface of the base body 1) in order to strengthen the connection between a plurality of members assembled to form the container-shaped base body 1. Fiber 3 is arranged. The reinforcing fiber 3 is made of a material in which a thermosetting resin such as an epoxy resin or an unsaturated polyester resin is impregnated in a glass fiber material such as glass cloth or a reinforcing material such as carbon fiber. That is, the reinforcing fiber 3 is made of, for example, FRP, like the base body 1.

A sealing reinforcement portion 2 is formed at a corner 71 of the base body 1. The corner 71 shown in FIGS. 8 and 5 and the corner 72 shown in FIG. 5 are collectively referred to as a corner here.
The corner 71 is a mountain-shaped connection portion between the members assembled to form the base body 1 when viewed from the outside of the inner tank container 50 or the outer tank container 60 (to form a convex shape). ) A place that is bent. When the corner 72 is viewed from the outside of the inner tank container 50 or the outer tank container 60, the connecting portions of a plurality of members assembled to constitute the base body 1 are valley-shaped (so as to form a concave shape). ) A place that is bent.

  The sealing reinforcement portion 2 is made of the same resin material as the thermosetting resin contained in the reinforcing fiber 3. The sealing reinforcement portion 2 is arranged so as to extend along a direction in which a plurality of corners 71 and corners 72 (corner portions) formed in the base body 1 extend (a direction perpendicular to the paper surface in FIG. 8). . That is, the sealing reinforcement part 2 is arrange | positioned so that the extended corner | angular 71 and corner 72 may be covered from the outer side of the inner tank container 50 or the outer tank container 60. FIG.

  The reinforcing fibers 3 are arranged so as to cover the outer peripheral portion of the base body 1 of the inner tank container 50 shown in FIG. The reinforcing fibers 3 are arranged so that a sheet-like member is in close contact with the surface of the base body 1. For this reason, the reinforcing fiber 3 and the base body 1 are integrated, and the surface of the inner tank container 50 and the outer tank container 60 can have a strength that can withstand thermal stress caused by a temperature cycle between room temperature and extremely low temperature. . This is due to a glass fiber material constituting the reinforcing fiber 3 or a reinforcing material such as carbon fiber.

  However, for example, in the vicinity of the corner 71 formed by the connecting portion between the member extending in the vertical direction in FIG. 9 and the member extending in the left-right direction in FIG. 9, the reinforcing fiber is in close contact with the surface of the base body 1. 3 is not arranged, and there is a tendency that a gap is formed between the base body 1 and the reinforcing fiber 3. When the reinforcing fiber 3 is wound along the surface of the base body 1, the reinforcing fiber 3 is deformed so as to follow the shape of the surface of the base body 1 at the corner 71 (a shape intersecting at an angle close to a right angle). This is because it is difficult to do. That is, in the vicinity of the corner 71, the reinforcing fiber 3 is curved so as to be rounder than the shape at the corner 71 of the base body 1 as shown in FIG. For this reason, a gap is easily formed between the curved portion of the reinforcing fiber 3 and the corner 71 of the base body 1.

  Since the corner portion such as the corner 71 is a connecting portion of a plurality of members, the members are not completely joined to the corner portion, and may be joined so as to form a part of the gap. Such voids are likely to occur particularly when the bonding strength between the plurality of members in the connecting portion is insufficient. If the reinforcing fiber 3 is further disposed without being in close contact with the gap 71 in a state where the corner 71 forms a gap, the inside and outside of the inner tank container 50 and the outer tank container 60 are arranged in the gap portion. A hole penetrating through is formed.

  If such a hole is formed, the sealing performance with respect to the inside of the inner tank container 50 and the outer tank container 60 will fall. Specifically, for example, the refrigerant 17 (see FIG. 2) for cooling the superconducting coil 10 held inside the inner tank container 50 may leak out of the inner tank container 50. Further, if a minute leak of gas such as air occurs between the inside and outside of the outer tank container 60 due to the holes, it becomes difficult to maintain the vacuum state inside the outer tank container 60. That is, the heat insulation property of the outer tank container 60 with respect to the inner tank container 50 may be reduced, and the efficiency of cooling the inside of the inner tank container 50 with the refrigerant 17 may be reduced.

  Even if the hole mentioned above is formed in the corner | angular part, the sealing reinforcement part 2 is arrange | positioned so that the said hole may be covered. That is, the sealing reinforcement part 2 improves the sealing performance of the inner tank container 50 and the outer tank container 60 by closing the corner holes. If the hole is closed by the sealing reinforcement portion 2, leakage of gas, refrigerant, etc. through the inside and outside of the inner tank container 50 and the outer tank container 60 is suppressed, and the function of the superconducting coil 10 can be enhanced.

  Further, if the gap between the base body 1 and the reinforcing fiber 3 is filled with the sealing reinforcing portion 2 made of resin, the possibility of gas such as air staying in the region sandwiched between the base body 1 and the reinforcing fiber 3 is reduced. can do. When air stays between the base body 1 and the reinforcing fiber 3 and the air exists so as to extend along the direction in which the corner 71 extends, for example, at the connection portion of the members constituting the base body 1 Cracks generated due to thermal stress and the like are enlarged, and the possibility that the base body 1 is damaged is increased. However, when the region sandwiched between the base body 1 and the reinforcing fibers 3 is filled with the resin material (sealing reinforcing portion 2), cracks are formed in the connecting portions of the members constituting the base body 1. However, since the crack is easily covered with the sealing reinforcement portion 2 (the inside of the crack is filled with the sealing reinforcement portion 2), the possibility that the crack progresses and the base body 1 is damaged is reduced.

  As described above, the sealing reinforcing portion 2 is formed at the corner (corner 71) of the opening 53 on the side surface of the inner tank container 50 (the opening 63 on the side surface of the outer tank container 60) as shown in FIG. Is formed. The openings 53 and 63 are formed as a space region in which a plurality of members constituting the base body 1 are connected to form a container-like frame, and the members are not arranged. For this reason, a plurality of connecting portions of members constituting the base body 1 are present in the openings 53 and 63. Therefore, it is preferable that the sealing reinforcement portion 2 is disposed at the corner 71 (corner portion) formed by the openings 53 and 63. In this way, it is possible to more reliably suppress the occurrence of vacuum leakage and the deterioration of the sealing function of the superconducting coil device in the openings 53 and 63.

  FIG. 10 shows a region where terminals for supplying power to the superconducting coil 10 from the outside and for outputting the power of the superconducting coil 10 to the outside pass through the end housing 55 of the inner tank container 50. It is an expanded sectional view which shows the aspect. In FIG. 10, the left side of the end casing 55 is the inner side of the inner tank container 50, and the right side of the end casing 55 is the outer side of the inner tank container 50. Since the end casing 55 is a part of the inner tank container 50, it can be considered to be the base body 1 like the inner tank container outer casing 51 shown in FIG.

  Of the members constituting the terminal 41 penetrating the base body 1, the member arranged in the region closest to the base body 1 in the outer side of the inner tank container 50 is, for example, the base body 1 of the base body 1 and the terminal 41. And a terminal constituting member 45 as a member having a role of maintaining the fixation between the terminal 41 and the terminal 41.

  As shown in FIG. 10, the reinforcing fibers 3 are arranged so as to cover the surface of the end housing 55 (base body 1), in other words, in close contact with the surface of the end housing 55 (base body 1). . However, the reinforcing fiber 3 is not disposed so as to be in close contact with the corner 72 at the corner 72 where the base body 1 and the terminal constituent member 45 intersect, and the base body 1 and the terminal constituent member 45 are shown in FIG. A gap tends to be formed between the two. This is because it is difficult to deform the reinforcing fiber 3 so as to follow an angle close to a right angle formed by the corner 72 as described above. That is, in the vicinity of the corner 72, the reinforcing fiber 3 is curved to be rounder than the shape at the corner 71 of the base body 1 as shown in FIG. For this reason, a gap is easily formed between the curved portion of the reinforcing fiber 3 and the corner 72 of the base body 1.

  It is preferable that the sealing reinforcement portion 2 is disposed so as to fill this gap. In this way, as in the case of FIG. 8 and FIG. 9 described above, the sealing reinforcing portion 2 covers a hole generated in a region (corner 72) where the end housing 55 and the terminal 41 intersect. By filling, the sealing function inside the inner tank container 50 can be enhanced. Moreover, even if a crack occurs in the base body 1 in the vicinity of the hole, for example, the possibility that the crack is developed and the inner tank container 50 is damaged due to the sealing reinforcing portion 2 closing the crack. Can do.

  As described above, the sealing reinforcing portion 2 is disposed so as to penetrate the side surface (for example, the end housing 55 which is a wall portion) of the inner tank container 50 and the side surface as shown in FIG. It is formed at the corner (corner 72) at the connection portion with the terminal 41. Since this region has a connection portion between the base body 1 and the terminal 41, it is preferable that the sealing reinforcement portion 2 is disposed at a corner 72 (corner portion) formed by the connection portion. In this way, it is possible to more reliably suppress the occurrence of vacuum leakage and the deterioration of the sealing function of the superconducting coil device at the corner 72.

  The terminal 41, the tubular members 57 and 58, and the outer tube members 67 and 68 are disposed so as to penetrate the end housing 55 in FIGS. However, they penetrate, for example, the side surfaces of the inner tank container 50 and the outer tank container 60 (similar to the openings 53 and 63 so as to penetrate the cavity penetrating the side surfaces of the inner tank container 50 and the outer tank container 60. ) May be arranged.

  Next, a method for manufacturing the superconducting coil device described above will be described. As shown in the flowchart of FIG. 11, a step of preparing a superconducting coil (S10) is first performed. This is a process of forming the superconducting coil 10 described above.

  The superconducting wire constituting the superconducting coil 10 is tape-shaped, and a bismuth (Bi) -based superconducting wire may be used, or a thin film superconducting wire may be used. The superconducting wire is preferably wound so as to form, for example, a saddle-shaped racetrack coil.

  Next, a step (S20) of preparing a container base body is performed. This is a step of forming the base body 1 as a frame constituting the inner tank container 50 and the outer tank container 60. Here, when forming the base body 1 of the inner tank container 50, it is preferable that the superconducting coil 10 prepared in the step (S10) is held inside the base body 1. Moreover, when forming the base body 1 of the outer tank container 60, it is preferable that the outer tank container 60 is formed so as to cover the outer surface of the inner tank container 50.

  The base body 1 of the inner tank container 50 and the outer tank container 60 is preferably formed of a member made of, for example, FRP having high strength and excellent heat insulation. However, since the inner tank container 50 and the outer tank container 60 have complicated shapes, it is difficult to integrally form them using, for example, a mold. For this reason, it is preferable that a plurality of members necessary for forming the base body 1 are prepared and joined to form the base body 1.

  Next, a step (S30) of arranging fibers is performed. Specifically, this is a step of arranging a sheet-like member for forming the reinforcing fiber 3 which is a fiber member so as to cover the outer periphery (outer surface) of the base body 1.

  As the sheet-like member, it is preferable to prepare a fiber member made of a glass fiber material such as a glass cloth included in the reinforcing fiber 3 or a reinforcing material such as carbon fiber. These are materials having a role as a reinforcing material that improves the strength of the resin by being impregnated with the resin. If the sheet-like member is disposed so as to be in close contact with the outer peripheral surface of the base body 1, the strength of the reinforcing fiber 3 to be formed is improved.

  Here, the sheet-like member is disposed so as to be in close contact with the surface of the base body 1, and is preferably disposed so as to be in close contact with the corner portion of the base body as much as possible.

  Next, a step (S40) of setting the mold shown in FIG. 11 is performed. Specifically, this is a step of setting the base body 1 inside a mold for performing a process of impregnating a resin in the sheet-like member disposed on the base body 1 in the step (S30). .

  Then, a step of impregnating the resin (S50) is performed. Here, for example, a thermosetting resin such as an epoxy resin or an unsaturated polyester resin is put into the mold. If it does in this way, the said thermosetting resin will be impregnated in the inside of the sheet-like member (fiber member) which covers the outer periphery of the base body 1 mounted in the inside of a metal mold | die.

  However, here, for example, if a gap is formed between the base body 1 and the sheet-like member, the resin fills the gap between the base body 1 and the sheet-like member. In this state, a curing process (S60) is performed. Specifically, the base body 1 is preferably heated in the mold at a temperature of 50 ° C. or more and 200 ° C. or less for 2 hours or more and 48 hours or less. In this way, the sheet-like member impregnated with the resin is thermally cured to become the reinforcing fiber 3 made of the FRP material, and the reinforcing fiber 3 is arranged so as to be integrated with the base body 1 to constitute the superconducting coil device. A container is formed. Therefore, the strength and heat insulation of the inner tank container 50 and the outer tank container 60 to be formed can be further increased.

  At this time, the resin material arranged to fill the gap between the base body 1 and the sheet-like member in the step (S50) is subjected to the heat treatment in the step (S60), as shown in FIG. 9 and FIG. 1 and a sealing reinforcing portion 2 that fills a space between the sheet-like member (reinforcing fiber 3).

  In the manufacturing method of the superconducting coil device according to the present invention described above, the reinforcing fiber 3 is formed when the reinforcing fiber 3 outside the base body 1 constituting the inner tank container 50 or the outer tank container 60 is formed. A sheet-like member made of a fiber member is arranged first, and then the resin material contained in the reinforcing fiber 3 is supplied. In this way, even when the sheet-like member is arranged on the surface of the base body, even if a gap is formed between the base body and the sheet-like member, the resin material to be supplied next will be The gap between the body and the sheet-like member is filled. For this reason, the gap between the reinforcing fiber 3 and the base body 1 finally formed by thermosetting is filled with the sealing reinforcing portion 2 in which the resin is cured. In other words, the resin that is supplied (impregnated) after supplying the sheet-like member has voids at the corners as the connecting portions of the members constituting the base body 1 and at the corners as the connecting portions between the base body 1 and the terminals 41. Even if it is formed, since the sealing reinforcement portion 2 that closes the gap is formed, the sealing function of each container constituting the superconducting coil device to be formed can be improved.

  If the reinforcing fiber 3 is formed, for example, a sheet-like member including both a fiber material that is a material constituting the reinforcing fiber 3 and a resin material is disposed on the surface of the base body 1 and then thermosetting is performed. The gap formed between the base body 1 and the sheet-like member remains as it is. Since the effect that the resin material contained in the sheet-like member oozes out so as to fill the gap between the base body 1 and the sheet-like member hardly occurs, the adhesion between the base body 1 and the sheet-like member does not occur. Gaps will be formed in areas that are insufficient. Therefore, if the region where the gap is formed is, for example, a corner of the base body 1 and there is a gap in which the connection of the members is insufficient, the sealing function of the container is deteriorated starting from the gap, The possibility of causing damage to the container increases.

  The embodiment disclosed this time should 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 all modifications within the meaning and scope equivalent to the scope of claims.

  The present invention is particularly excellent as a technique for improving the sealing function of a container that holds a superconducting coil in a superconducting device.

  DESCRIPTION OF SYMBOLS 1 Base body, 2 Sealing reinforcement part, 3 Reinforcing fiber, 10 Superconducting coil, 13 Rotor core, 16 Rotor shaft, 17 Refrigerant, 18 Output shaft, 20 Stator, 21 Gap, 23 Stator core, 30 Rotor, 35 Bearing, 41 Terminal, 43 Housing fixing terminal, 45 Terminal component member, 47 Wire material fixing terminal, 50 Inner tank container, 51 Inner tank container outer casing, 52 Inner tank container inner casing, 53, 63 Opening, 54, 64 Opening side 55, 56, 65, 66 End housing, 57, 58 Tubular member, 60 Outer tank container, 61 Outer tank container outer housing, 62 Outer tank container inner housing, 67, 68 Outer tube member, 71 square, 72 corners, 100 superconducting motor.

Claims (6)

A superconducting coil;
A superconducting coil device comprising a container for holding the superconducting coil therein,
The container is
A base body configured by connecting a plurality of members;
The formed along the connecting portion of the plurality of members together in the base member, seen including a sealing reinforcing portion made of a resin,
The container includes reinforcing fibers disposed on a surface of the base body;
The sealing reinforcing portion is disposed in a region sandwiched between the base body and the reinforcing fiber,
In the container, the connection portion includes a portion bent in a mountain shape,
The reinforcing fiber includes a curved portion that is curved so as to be rounder than the portion bent in a mountain shape of the connection portion,
The superconducting coil device, wherein the sealing reinforcing portion is disposed so as to fill a gap between the curved portion and the connection portion . A superconducting coil;
A superconducting coil device comprising a container for holding the superconducting coil therein,
The container is
A base body configured by connecting a plurality of members;
Formed along the connecting portion between the plurality of members in the base body, including a sealing reinforcement portion made of resin,
The container includes reinforcing fibers disposed on a surface of the base body;
The sealing reinforcing portion is disposed in a region sandwiched between the base body and the reinforcing fiber,
In the container, the connection portion includes a portion bent in a valley shape,
The reinforcing fiber includes a curved portion that is curved so as to be rounder than the portion bent in a valley shape of the connection portion,
The superconducting coil device, wherein the sealing reinforcing portion is disposed so as to fill a gap between the curved portion and the connection portion. An opening is formed on the side of the container,
The sealing reinforcement unit is arranged in the connecting portion of the opening, the superconducting coil apparatus according to claim 1 or 2. And further comprising a penetrating member disposed so as to penetrate the wall portion of the container, wherein the sealing reinforcing portion is disposed at the connecting portion of the connecting portion between the wall portion of the container and the penetrating member. Item 4. The superconducting coil device according to any one of Items 1 to 3 . Superconducting apparatus using superconducting coils apparatus according to claim 1 or 2. Preparing the superconducting coil;
Preparing the base body, holding the superconducting coil inside;
Arranging the fiber member so as to cover the outer periphery of the base body;
Impregnating the fiber member disposed on the outer periphery of the base body with resin;
The manufacturing method of the superconducting coil apparatus of Claim 1 or 2 provided with the process of forming a container by hardening | curing the said fiber member.

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