Star imitator magnet

Abstract

The application provides a star simulator magnet, which comprises a connecting ring, a plurality of coils and a base. The plurality of coils are arranged in a ring shape at the outer periphery of the connecting ring, and the outer wall surface of each coil is fixedly connected with the outer wall surface of the connecting ring; the opposite surfaces of any two adjacent coils are connected with a connecting assembly, and the two ends of the connecting assembly are fixedly connected with the opposite surfaces of the two coils respectively. The outer wall surface of each coil is connected with the top end of the base along the height direction of the base through a supporting assembly. Each supporting assembly comprises a sliding supporting part and a rotating supporting part, the sliding supporting part is slidingly connected with the top end of the base along the radial direction of the connecting ring, and the rotating supporting part is fixedly connected with the outer wall surface of the corresponding coil and can rotate relative to the sliding supporting part around a first axis. The star simulator magnet has sufficient supporting strength during operation, so as to maintain the stability of the whole star simulator magnet structure, and is simple to install and convenient for later maintenance.

Description

Technical Field

[0001] This invention relates to the field of superconductor technology, and in particular to a stellarator magnet. Background Technology

[0002] A stellarator is a device that confines high-temperature plasma using an external magnetic field. Its core principle is to create a closed "magnetic cage" by generating a three-dimensional tortuous magnetic field using external coils, thereby confining the high-temperature plasma (which can reach temperatures of hundreds of millions of degrees Celsius) and maintaining its stable existence to achieve a continuous nuclear fusion reaction. Compared to Tokamak devices, which rely on plasma current to generate part of the magnetic field, the stellarator's magnetic field is entirely generated by external coils. This offers significant advantages such as no current-driven operation, high plasma confinement stability, and great potential for steady-state operation, making it an important candidate for the steady-state operation of future fusion reactors.

[0003] Superconducting magnets are among the most critical components of stellarators, directly determining the strength, precision, and stability of the magnetic field. To generate complex three-dimensional twisted magnetic cages, stellarator superconducting magnets are typically designed as modular, asymmetric structures. Each module has a unique geometry, spatial location, and current parameters, and must operate at extremely low temperatures (typically within the liquid helium temperature range of 4.2 K) to achieve superconductivity. However, this unique design and operating environment presents multiple challenges to the engineering implementation of the magnet system, with the design of the support structure being a crucial element in ensuring the stable operation of the superconducting magnet.

[0004] Because superconducting magnets typically operate under extreme conditions, the requirements for the support structure are further increased. Specifically, superconducting magnets need to be cooled from room temperature (300K) to an ultra-low temperature of 4K during operation, during which the magnet material undergoes radial contraction. If the support structure cannot release this displacement, it will generate huge secondary stresses, directly causing problems such as magnet structure deformation and insulation layer damage. Furthermore, when stellarator magnets are operated with large currents, they are subjected to enormous electromagnetic forces, including radial and tangential forces, within the strong magnetic field generated by themselves and adjacent coils. For modular asymmetric magnets, the distribution of electromagnetic forces is complex and the forces on each module are uneven. If the support structure cannot effectively transfer the load to the device body, it will also cause the magnet to become unstable due to force imbalance. In addition, the modular design of stellarator magnets results in complex spatial attitudes and connections between modules, requiring extremely high precision in the relative positions between magnets. If the support structure cannot achieve high-precision positioning, it will lead to magnetic field distortion, affecting plasma confinement performance.

[0005] Therefore, due to insufficient design of the support structure, existing stellarators often suffer from structural cracks caused by cold contraction of the magnets and module displacement caused by electromagnetic forces, which limits the improvement of magnetic field strength and operating time. Summary of the Invention

[0006] The purpose of this invention is to solve the problem that the lack of proper support structure design in stellarators in the prior art can easily lead to abnormal magnet structures.

[0007] To address the aforementioned problems, embodiments of the present invention disclose a stellarator magnet, comprising: a connecting ring; multiple coils, including planar annular coils and / or non-planar annular coils, arranged in a ring-like pattern around the outer periphery of the connecting ring, with the outer wall surface of each coil fixedly connected to the outer wall surface of the connecting ring; any two adjacent coils are spaced apart along their thickness direction on opposite surfaces, and a connecting assembly is connected between the opposite surfaces of any two adjacent coils, with the two ends of the connecting assembly fixedly connected to the two opposite surfaces of the two coils respectively; a base, the bottom end of the base along its height direction for support on a support surface, and a support assembly connecting the outer wall surface of each coil to the top end of the base along its height direction, so that the base supports the corresponding coil through each support assembly; each support assembly includes a sliding support member and a rotating support member disposed on the sliding support member, the sliding support member being slidably connected to the top end of the base along the radial direction of the connecting ring, so that the sliding support member can move relative to the base within a second distance threshold range; the rotating support member being fixedly connected to the outer wall surface of the corresponding coil and can rotate relative to the sliding support member about a first axis; the first axis is perpendicular to the radial and axial directions of the connecting ring, and the axial direction of the connecting ring is parallel to the height direction of the base.

[0008] The above-described scheme, through the connection ring, effectively bears the enormous centripetal force generated during magnet operation, ensuring the structural stability of the stellarator magnet during operation. By placing connecting components between adjacent coils, multiple coils are connected to form a whole, increasing the overall stiffness of the stellarator magnet and effectively resisting deformation. Support components are used to release the shrinkage deformation of the stellarator magnet at low temperatures and the radial deformation during operation, thereby reducing the stress on the stellarator magnet's support structure and ensuring its stability. Finally, a base is used to support the superconducting magnet on the ground.

[0009] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment of the present invention has a plurality of connecting blocks fixedly disposed on the outer wall surface of the connecting ring. The plurality of connecting blocks are spaced apart along the circumference of the connecting ring, and the plurality of connecting blocks correspond one-to-one with a plurality of coils. Each connecting block is fixedly connected to the corresponding coil. The connecting ring includes a plurality of arc-shaped connecting plates connected end to end along the circumference of the connecting ring, and the opposite ends of any two adjacent arc-shaped connecting plates are detachably fixedly connected.

[0010] By adopting the above solution, connecting multiple arc-shaped connecting plates to form a connecting ring makes the manufacturing, transportation, and installation of the connecting ring more convenient. Furthermore, connecting multiple arc-shaped connecting plates to form a connecting ring allows for flexible adjustment of the connecting ring's diameter or the number of coils as needed, improving the device's adaptability.

[0011] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment of the present invention has a first connecting flange and a second connecting flange fixedly provided at both ends of the inner wall surface of each arc-shaped connecting plate. In any two adjacent arc-shaped connecting plates, the first connecting flange of one arc-shaped connecting plate is fixedly connected to the second connecting flange of the other arc-shaped connecting plate to fix the two arc-shaped connecting plates together. Each arc-shaped connecting plate has at least one reinforcing plate provided on its inner wall surface. Each reinforcing plate extends circumferentially along the connecting ring. The at least one reinforcing plate includes a first reinforcing plate, a second reinforcing plate, and a third reinforcing plate located at the upper, middle, and lower parts of the arc-shaped connecting plate, respectively. The first reinforcing plate, the second reinforcing plate, and the third reinforcing plate are all provided with reinforcing ribs.

[0012] By adopting the above scheme and setting up connecting flanges, reinforcing plates, and reinforcing ribs, the connection strength and overall rigidity of the arc-shaped connecting plates can be effectively improved. Specifically, the connecting flanges make the connection between adjacent arc-shaped connecting plates more robust, while the combination of reinforcing plates and reinforcing ribs significantly enhances the deformation resistance of the arc-shaped connecting plates.

[0013] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment has a first wedge-shaped semi-groove and a second wedge-shaped semi-groove respectively provided at both ends of the inner wall surface of each arc-shaped connecting plate. In any two adjacent arc-shaped connecting plates, the first wedge-shaped semi-groove of one arc-shaped connecting plate is arranged opposite to the second wedge-shaped semi-groove of the other arc-shaped connecting plate, so that the oppositely arranged first wedge-shaped semi-groove and second wedge-shaped semi-groove form a wedge-shaped fixing groove. An anti-shear component is provided in the wedge-shaped fixing groove. The anti-shear component includes a screw, a nut, and a wedge-shaped block adapted to the wedge-shaped fixing groove. A connecting hole is opened in the middle of the side of the wedge-shaped block away from the wedge-shaped fixing groove. The screw is fixed in the connecting hole by the nut. The outer wall surface of the wedge-shaped block is in contact with the inner wall surface of the first wedge-shaped semi-groove and the second wedge-shaped semi-groove, so that the two adjacent arc-shaped connecting plates are aligned.

[0014] By employing the above scheme, the precise alignment and reliable connection of adjacent arc-shaped connecting plates are achieved through the cooperation of the wedge-shaped fixing groove and the shear-resistant component. The tight fit between the wedge block and the wedge-shaped fixing groove effectively transmits shear force and prevents relative displacement at the connection points of the arc-shaped connecting plates. The tightening effect of the screw and nut further enhances the stability of the connection, while also facilitating disassembly and maintenance.

[0015] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment of the present invention includes a connecting assembly comprising a first fixed seat and a second fixed seat disposed opposite to each other, and a connecting plate; the ends of the first fixed seat and the second fixed seat that are close to each other are respectively provided with a first groove and a second groove; one end of the connecting plate is disposed in the first groove and abuts against the inner peripheral wall of the first groove, and the other end of the connecting plate is disposed in the second groove and abuts against the inner peripheral wall of the second groove; the ends of the first fixed seat and the second fixed seat that are far from each other are respectively fixedly connected to two surfaces opposite to two coils, and there is a gap between the opposite ends of the first fixed seat and the second fixed seat.

[0016] By adopting the above scheme, the connection components can effectively resist coil displacement and avoid excessive stress. At the same time, the multiple circumferentially arranged connection components can form a stable force transmission path, ensuring the overall rigidity of the magnet structure.

[0017] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment has multiple threaded holes spaced apart at both ends of the connecting plate. Each threaded hole extends along the thickness direction of the connecting plate, and a pre-tightening member is provided in each threaded hole. The pre-tightening member is threadedly connected to the threaded hole. The pre-tightening member located at one end of the connecting plate can press one end of the connecting plate against the inner circumferential wall of the first groove, and the pre-tightening member located at the other end of the connecting plate can press the other end of the connecting plate against the inner circumferential wall of the second groove. The cross-section of the connecting plate along the circumferential direction of the connecting ring is wedge-shaped. The first groove and the second groove are both configured as wedge-shaped grooves adapted to the connecting plate. Multiple connecting components are connected between any two adjacent coils, and the multiple connecting components are spaced apart along the circumferential direction of the coils.

[0018] Using the above solution, the contact pressure can be maintained through the wedge-shaped fit between the groove and the connecting plate, while the pre-tightening component ensures the stability of the connection.

[0019] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment has a sliding support and a rotating support rotatably connected by a rotating shaft assembly; the rotating support includes a column and a rotating plate, the top end of the column is fixedly connected to a corresponding coil, the rotating plate is fixedly connected to the bottom end of the column, and the rotating plate has a first shaft hole penetrating its thickness direction; the sliding support includes a base plate and a first upright plate and a second upright plate arranged at opposite intervals, the base plate is slidably connected to the top end of the base along the radial direction of the connecting ring, the bottom ends of the first upright plate and the second upright plate are fixedly disposed on the base plate, and both the first upright plate and the second upright plate have a second shaft hole corresponding to the first shaft hole, the rotating plate is located between the first upright plate and the second upright plate, and the rotating shaft assembly passes through the first shaft hole and the second shaft hole to rotatably connect the sliding support and the rotating support together; wherein, the axes of the first shaft hole and the second shaft hole constitute a first axis.

[0020] Using the above scheme, a rotating shaft assembly enables a rotatable connection between the sliding support and the rotating support, allowing the rotating support to rotate relative to the sliding support around a first axis. Simultaneously, the sliding support can slide radially along the connecting ring. Through the cooperation of the sliding and rotating supports, the radial and axial displacement requirements of the coil can be met.

[0021] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment has a rotating shaft assembly comprising a connecting shaft, the connecting shaft being configured as a stepped shaft, and including a first shaft segment, a second shaft segment, and a third shaft segment that are sequentially connected along its axial direction and whose diameters gradually decrease. The end face of the first shaft segment near the second shaft segment abuts against the side of the first upright plate away from the rotating plate. The second shaft segment passes through a second shaft hole in the first upright plate, and the third shaft segment passes through the first shaft hole in the rotating plate and the second shaft hole in the second upright plate. The rotating shaft assembly further includes a first sleeve, a second sleeve, and a retaining ring, the first sleeve, the second sleeve, and the retaining ring being respectively sleeved on the third shaft segment of the connecting shaft. The outer wall surface of the first sleeve abuts against the second sleeve in the axial direction of the connecting shaft, and the end face of the first sleeve away from the second sleeve abuts against the end face of the second shaft segment near the third shaft segment; in the radial direction of the connecting shaft, the first sleeve is pressed between the outer wall surface of the third shaft segment and the inner wall surface of the first shaft hole, and the second sleeve is pressed between the outer wall surface of the third shaft segment and the inner wall surface of the second shaft hole in the second vertical plate; wherein, the first shaft hole of the rotating plate is configured as a stepped hole, and includes a first hole segment and a second hole segment connected in sequence along its axial direction with a gradually decreasing diameter; the first sleeve includes a first cylinder body, a second cylinder body and a third cylinder body connected in sequence along its axial direction, and the second cylinder body protrudes from the first cylinder body. The outer wall surface of the first cylinder and the outer wall surface of the third cylinder are connected. The end face of the first cylinder away from the second cylinder abuts against the end face of the second shaft section near the third shaft section, and the end face of the third cylinder away from the second cylinder abuts against the second sleeve. The outer wall surface of the second cylinder abuts against the inner wall surface of the first hole section, and the outer wall surface of the third cylinder abuts against the inner wall surface of the second hole section. The rotating shaft assembly also includes a clamping ring, which is sleeved on the outer wall surface of the first cylinder in the first sleeve, and includes a first clamping part and a second clamping part connected sequentially along its axial direction. The first clamping part protrudes from the outer wall surface of the second clamping part, and the end face of the first clamping part near the second clamping part abuts against the rotating plate near the first shaft section. The end face of the vertical plate is pressed between the outer wall surface of the first cylinder and the inner wall surface of the first hole section in the radial direction of the connecting shaft. The first pressing part is fixed to the rotating plate by fasteners, so that the end face of the second pressing part away from the first pressing part is pressed against the end face of the second cylinder near the first cylinder, and the end face of the second cylinder away from the first cylinder is pressed against the end face of the first hole section near the second hole section. The outer wall surface of the second sleeve abuts against the inner wall surface of the second shaft hole in the second vertical plate. The outer wall surface of the second sleeve away from the first sleeve is provided with a protrusion. In the axial direction of the connecting shaft, the protrusion is pressed between the fixing ring and the side of the second vertical plate away from the rotating plate.

[0022] By adopting the above scheme, by setting a stepped shaft and a stepped hole, and cooperating with the first sleeve, the second sleeve and the clamping ring, the load-bearing capacity and stability of the rotating shaft assembly can be effectively improved, avoiding loosening or wear caused by rotation or sliding, and at the same time, a stable and reliable rotational connection between the rotating support and the sliding support is achieved.

[0023] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment has a connecting shaft as a stud, a fastener as a screw, and a fixing ring as a nut; a fixing component is provided at the top of the base corresponding to the position of the sliding support; the fixing component includes a fixing plate and a pressure plate, one side of the fixing plate is fixedly connected to the top of the base, and the other side is provided with a guide rail, and the base plate is slidably connected in the guide rail; the pressure plate is stepped, and the bottom end of the pressure plate is fixedly connected to the fixing plate, and the top end of the pressure plate is located on the side of the base plate away from the fixing plate, forming a space between the pressure plate and the fixing plate for the base plate to slide.

[0024] By adopting the above scheme, the stepped design of the pressure plate can limit the displacement of the base plate in the guide rail, guide the sliding of the base plate, and at the same time retain sufficient sliding space.

[0025] According to another specific embodiment of the present invention, the stellarator magnet disclosed in this embodiment has a base including a support beam and a plurality of support columns. The support beam extends along the circumferential direction of the connecting ring, and the plurality of support columns are spaced apart along the extension direction of the support beam. The top end of each support column is fixedly disposed on the lower side of the support beam along its height direction, and the bottom end of each support column is used to support the support surface. The upper side of the support beam along its height direction constitutes the top end of the base.

[0026] By adopting the above scheme, and extending the support beams circumferentially along the connecting ring, the centripetal force generated by the coil can be evenly transmitted to each support column, thereby avoiding local stress concentration. Furthermore, the multiple support columns enhance the overall stability of the base, preventing structural collapse due to single-point failure.

[0027] The beneficial effects of this invention are:

[0028] The stellarator magnet provided in this application effectively bears the enormous centripetal force generated during operation through the connection ring, ensuring the structural stability of the stellarator magnet during operation. By setting connecting components between two adjacent coils, multiple coils are connected to form a whole, increasing the stiffness of the entire stellarator magnet and effectively resisting deformation. Support components release the shrinkage deformation of the stellarator magnet at low temperatures and the radial deformation during operation, thereby reducing the stress on the support structure and ensuring its stability. Finally, a base supports the superconducting magnet on the ground. This application provides the stellarator magnet with sufficient support strength to maintain the stability of the entire stellarator magnet structure during operation, and it is simple to install and convenient for later maintenance. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the stellarator magnet provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the connecting ring in the stellarator magnet provided in an embodiment of the present invention;

[0031] Figure 3 This is a partially enlarged view of the connecting ring in the stellarator magnet provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the connecting components in the stellarator magnet provided in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the first fixing seat and connecting block of the connecting component in the stellarator magnet provided in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the support component in the stellarator magnet provided in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the rotating shaft assembly in the stellarator magnet provided in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the base structure of the stellarator magnet provided in an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Connecting ring; 11. Connecting block; 12. Arc-shaped connecting plate; 13. First connecting flange; 14. Second connecting flange; 15. Reinforcing plate; 16. Reinforcing rib; 17. Screw; 18. Nut; 19. Wedge block; 2. Coil; 3. Connecting assembly; 31. First fixed seat; 32. Second fixed seat; 33. Connecting plate; 34. Pre-tightening component; 4. Base; 41. Fixed plate; 42. Pressure plate; 43. Support beam; 44. Support column; 5. Support assembly; 51. Sliding support component; 511. Base plate; 512. First upright plate; 513. Second upright plate; 52. Rotating support component; 521. Column; 522. Rotating plate; 6. Rotating shaft assembly; 61. Connecting shaft; 62. First sleeve; 63. Second sleeve; 64. Fixed ring; 65. Pressing ring; 66. Fastener. Detailed Implementation

[0039] To address the problem of magnet structural abnormalities in existing stellarators due to inadequate support structure design, this embodiment provides a stellarator magnet. Specifically, refer to... Figure 1The stellarator magnet includes a connecting ring 1 and multiple coils 2. The multiple coils 2 include planar toroidal coils and / or non-planar toroidal coils, arranged in a ring-like pattern around the outer periphery of the connecting ring 1, with the outer wall of each coil 2 fixedly connected to the outer wall of the connecting ring 1. Specifically, the connecting ring 1 connects the multiple coils 2 together and supports the coils 2. A planar toroidal coil is one whose outer wall is on the same plane when viewed radially and does not protrude in any other direction. A non-planar toroidal coil is one whose outer wall is not on the same plane when viewed radially and protrudes in other directions. In this embodiment, the multiple coils are composed of both planar and non-planar toroidal coils to create a complex three-dimensional twisted magnetic cage while controlling the magnet volume. Of course, in other alternative implementations, it can be composed only of planar toroidal coils to reduce volume; it can also be composed only of non-planar toroidal coils to form a more complex magnetic cage. In this embodiment, the coil 2 includes a coil box and windings disposed within the coil box.

[0040] Two adjacent coils 2 are spaced apart along one surface of their thickness direction, and a connecting component 3 connects the opposing surfaces of the two adjacent coils 2. The two ends of the connecting component 3 are fixedly connected to the two opposing surfaces of the two coils 2, respectively. Specifically, this can be achieved by welding. The connecting component 3 can be a plate-like, block-like, or other shaped structure that provides support to resist changes in the spacing between adjacent coils 2. The first distance threshold is generally 0.1 to 1 times the axial distance between the two sides of the coil 2.

[0041] The base 4 has its bottom end along its height direction for support on a support surface. Each coil 2 has its outer wall surface connected to the top end of the base 4 along its height direction by a support component 5, so that the base 4 supports the corresponding coil 2 via each support component 5. The support surface can be, for example, the ground or other location where the stellarator magnet needs to be placed. The base 4 can adopt an integral or split structure, for example, consisting of a beam structure and a column structure. The beam structure extends circumferentially along the connecting ring 1, and the column structures are spaced apart to provide stable support.

[0042] Each support assembly 5 includes a sliding support 51 and a rotating support 52 disposed on the sliding support 51. The sliding support 51 is slidably connected to the top of the base 4 along the radial direction of the connecting ring 1, so that the sliding support 51 can move relative to the base 4 within a second distance threshold range. The rotating support 52 is fixedly connected to the outer wall of the corresponding coil 2 and can rotate relative to the sliding support 51 about a first axis; the first axis is perpendicular to the radial and axial directions of the connecting ring 1, and the axial direction of the connecting ring 1 is parallel to the height direction of the base 4. Specifically, the sliding support 51 can slide radially via a guide rail or a slide groove, and the rotating support 52 can rotate about the first axis via a rotating shaft or a bearing. The second distance threshold range can be set to within half the distance between the two sides of the base 4 in the sliding direction.

[0043] By employing the above structure and the connecting ring 1, the enormous centripetal force generated during magnet operation is effectively borne, ensuring the structural stability of the stellarator magnet during operation. By setting a connecting component 3 between two adjacent coils 2, multiple coils 2 are connected to form a whole, increasing the stiffness of the entire stellarator magnet and effectively resisting deformation. Furthermore, the two ends of the connecting component 3 are fixedly connected to the two opposite surfaces of the two adjacent coils 2, providing support for the coils 2 and resisting relative movement between them, thus improving the stability of the coils 2. Further, the support component 5 is used to release the shrinkage deformation of the stellarator magnet at low temperatures and the radial deformation during operation, thereby reducing the stress on the support structure of the stellarator magnet and ensuring its stability. Finally, the base 4 stably supports the superconducting magnet on the support surface. This application provides sufficient support strength for the stellarator magnet during operation to maintain the stability of the entire stellarator magnet structure, and it is simple to install and convenient for later maintenance.

[0044] Further, refer to Figure 2 In this stellarator magnet, multiple connecting blocks 11 are fixedly arranged on the outer wall of the connecting ring 1. These connecting blocks 11 are spaced apart along the circumference Z of the connecting ring 1, and each connecting block 11 corresponds one-to-one with a multiple coil 2. Each connecting block 11 is fixedly connected to its corresponding coil 2. The connecting ring 1 includes multiple arc-shaped connecting plates 12 connected end-to-end along the circumference of the connecting ring 1. The opposite ends of any two adjacent arc-shaped connecting plates 12 are detachably fixedly connected. It should be noted that... Figure 1 and Figure 2 Only one of the arc-shaped connecting plates 12 in the connecting ring 1 is shown. The connecting ring 12 is formed by splicing together multiple arc-shaped connecting plates 12. Figure 2 The diagram shows the circumferential Z, axial X, and radial Y directions of the connecting ring 1. The circumferential Z direction refers to the length extension direction of the connecting ring 1, the axial X direction refers to the direction of the axis extension of the connecting ring 1, and the radial Y direction refers to the direction along the radius of the connecting ring 1.

[0045] Specifically, the connecting block 11 can be made of high-strength alloy material, such as stainless steel or titanium alloy, to ensure structural strength and corrosion resistance. The connecting block 11 and the connecting ring 1 can be fixed together by welding or bolting. The shape of the arc-shaped connecting plate 12 can be designed as arc segments with different radii of curvature according to actual needs, for example, using arc segments of 90 degrees to 120 degrees to form a complete ring structure. The connection methods of adjacent arc-shaped connecting plates 12 include, but are not limited to, flange connection, wedge groove fit, or pin connection. As a preferred embodiment, matching flanges are provided at the ends of adjacent arc-shaped connecting plates 12, and detachable fixing is achieved by bolts. The connecting block 11 is fixed to both the coil 2 and the connecting ring 1 by welding, and the connecting block 11 is fixed to the front end of the coil 2 to strengthen the support for the front end of the coil 2.

[0046] This structure, by connecting multiple arc-shaped connecting plates 12 to form a connecting ring 1, makes the manufacturing, transportation, and installation of the connecting ring 1 more convenient. The connecting block 11 enhances the connection strength between the coil 2 and the connecting ring 1, effectively dispersing the electromagnetic load. The detachable connection of multiple arc-shaped connecting plates 12 facilitates maintenance and replacement of individual arc-shaped connecting plates 12 or coils 2, reducing the overall maintenance cost. Furthermore, connecting multiple arc-shaped plates 12 to form the connecting ring 1 allows for flexible adjustment of the diameter of the connecting ring 1 or the number of coils 2 as needed, improving the adaptability of the device. This structure, while ensuring the overall rigidity of the stellarator magnet, better accommodates the deformation of the stellarator magnet in low-temperature operating environments.

[0047] Further, refer to Figure 2 In this stellarator magnet, a first connecting flange 13 and a second connecting flange 14 are fixedly provided at both ends of the inner wall surface of each arc-shaped connecting plate 12. In any two adjacent arc-shaped connecting plates 12, the first connecting flange 13 of one arc-shaped connecting plate 12 is fixedly connected to the second connecting flange 14 of the other arc-shaped connecting plate 12 to fix the two arc-shaped connecting plates 12 together. Each arc-shaped connecting plate 12 has at least one reinforcing plate 15 on its inner wall surface. Each reinforcing plate 15 extends along the circumferential direction Z of the connecting ring 1. At least one reinforcing plate 15 includes a first reinforcing plate, a second reinforcing plate, and a third reinforcing plate located at the upper, middle, and lower parts of the arc-shaped connecting plate 12, respectively. Reinforcing ribs 16 are provided on the first, second, and third reinforcing plates.

[0048] Specifically, the first connecting flange 13 and the second connecting flange 14 can be fixed by welding or bolting. The reinforcing plate 15 enhances the overall rigidity of the arc-shaped connecting plate 12. The first, second, and third reinforcing plates are located at the upper, middle, and lower parts of the arc-shaped connecting plate 12, respectively, effectively distributing stress while increasing rigidity. Furthermore, the reinforcing ribs 16 can be arranged laterally or longitudinally to further improve the bending resistance of the reinforcing plate 15, or they can be distributed in a grid pattern to enhance the stability of the overall structure. As a preferred implementation, multiple reinforcing ribs 16 are provided on both sides of the reinforcing plate 15 along the axial direction of the connecting ring 1, and each reinforcing rib 16 has a conical structure with its top not exceeding the edge of the arc-shaped connecting plate 12, thereby improving rigidity while preventing interference with other structures. The reinforcing ribs 16 are preferably fixed to the reinforcing plate 15 by welding. The first connecting flange 13 and the second connecting flange 14 are preferably connected to the arc-shaped connecting plate 12 by welding, and the two connecting flanges are preferably connected by bolting.

[0049] With this structure, the connection strength and overall rigidity of the arc-shaped connecting plate 12 can be effectively improved by setting the connecting flange, the reinforcing plate 15, and the reinforcing rib 16. Among them, the setting of the connecting flange makes the connection between adjacent arc-shaped connecting plates 12 more secure, while the combination of the reinforcing plate 15 and the reinforcing rib 16 can significantly improve the deformation resistance of the arc-shaped connecting plate 12.

[0050] Further, refer to Figure 2 In this stellarator magnet, each arc-shaped connecting plate 12 has a first wedge-shaped semi-groove and a second wedge-shaped semi-groove respectively provided at both ends of its inner wall surface. In any two adjacent arc-shaped connecting plates 12, the first wedge-shaped semi-groove of one arc-shaped connecting plate 12 is arranged opposite to the second wedge-shaped semi-groove of the other arc-shaped connecting plate 12, so that the oppositely arranged first wedge-shaped semi-groove and second wedge-shaped semi-groove form a wedge-shaped fixing groove. A shear-resistant component A is provided in the wedge-shaped fixing groove, as shown in the reference. Figure 3 The shear-resistant component A includes a screw 17, a nut 18, and a wedge block 19 adapted to the wedge-shaped fixing groove. A connecting hole is provided in the middle of the side of the wedge block 19 away from the wedge-shaped fixing groove. The screw 17 is fixed in the connecting hole by the nut 18. The outer wall surface of the wedge block 19 is in contact with the inner wall surface of the first wedge half groove and the second wedge half groove so that the two adjacent arc-shaped connecting plates 12 are aligned.

[0051] Specifically, the cross-sectional shapes of the first and second wedge-shaped semi-grooves can be trapezoidal, triangular, or other geometric shapes capable of forming a wedge fit. Before screwing the first connecting flange 13 and the second connecting flange 14 together to fix the two arc-shaped connecting plates 12, positioning is achieved by aligning the first and second wedge-shaped semi-grooves to improve assembly efficiency. The material of the wedge block 19 can be high-strength alloy steel or stainless steel to ensure its shear strength and wear resistance. The screw 17 and nut 18 can be threaded connectors for easy installation and disassembly. As a preferred embodiment, the outer wall surface of the wedge block 19 can be coated with a lubricating material to reduce frictional resistance with the inner wall surface of the wedge-shaped fixing groove, facilitating adjustment and positioning. Furthermore, the connecting hole can be configured as a through hole or a blind hole, depending on the installation space and stress requirements.

[0052] When connecting two arc-shaped connecting plates 12, first place the two arc-shaped connecting plates 12 in adjacent positions. Then, install the wedge-shaped blocks 19 in the adjacent first and second wedge-shaped semi-grooves of the two plates to position and align the two arc-shaped connecting plates 12. After that, screw the screw 17 into the connecting hole and fix it with the nut 18. Next, connect the corresponding first connecting flange 13 and second connecting flange 14 to connect the two adjacent arc-shaped connecting plates 12 together.

[0053] The shear-resistant component A is used for positioning during the installation of two adjacent arc-shaped connecting plates 12, and also for shear resistance between the two adjacent arc-shaped connecting plates 12.

[0054] With this structure, the wedge-shaped fixing groove and the shear-resistant component A work together to achieve precise alignment and reliable connection of adjacent arc-shaped connecting plates 12. The tight fit between the wedge block 19 and the wedge-shaped fixing groove effectively transmits shear force and prevents relative displacement at the connection points of the arc-shaped connecting plates 12. The tightening effect of the screw 17 and the nut 18 further enhances the stability of the connection, while also facilitating disassembly and maintenance.

[0055] Further, refer to Figure 4 In this stellarator magnet, the connecting assembly 3 includes a first fixing seat 31 and a second fixing seat 32 disposed opposite to each other, and a connecting plate 33. The ends of the first fixing seat 31 and the second fixing seat 32 that are close to each other are respectively provided with a first groove and a second groove. One end of the connecting plate 33 is disposed in the first groove and abuts against the inner peripheral wall of the first groove, and the other end of the connecting plate 33 is disposed in the second groove and abuts against the inner peripheral wall of the second groove. The ends of the first fixing seat 31 and the second fixing seat 32 that are far from each other are respectively fixedly connected to the two opposing surfaces of the two coils 2, and there is a gap between the opposing ends of the first fixing seat 31 and the second fixing seat 32.

[0056] Furthermore, multiple threaded holes are spaced apart at both ends of the connecting plate 33. Each threaded hole extends along the thickness direction of the connecting plate 33, and a pre-tightening member 34 is provided in each threaded hole. The pre-tightening member 34 is threadedly connected to the threaded hole. The pre-tightening member 34 located at one end of the connecting plate 33 can press one end of the connecting plate 33 against the inner peripheral wall of the first groove, and the pre-tightening member 34 located at the other end of the connecting plate 33 can press the other end of the connecting plate 33 against the inner peripheral wall of the second groove. (Reference) Figure 5 The connecting plate 33 has a wedge-shaped cross-section along the circumference of the connecting ring 1, and the first and second grooves are both wedge-shaped grooves adapted to the connecting plate 33. Multiple connecting components 3 are connected between any two adjacent coils 2, and the multiple connecting components 3 are spaced apart along the circumference of the coils.

[0057] In a preferred embodiment, the preload 34 can be made of high-strength bolts to ensure the clamping effect between the connecting plate 33 and the groove. The wedge-shaped cross-section angle of the connecting plate 33 is preferably 5°-15°, which ensures self-alignment during assembly and avoids stress concentration caused by excessive angle. There is a slight interference fit between the connecting plate 33 and the first fixing seat 31 and the second fixing seat 32. The inner peripheral walls of the first and second grooves, as well as the outer surface of the connecting plate 33, are roughened, preferably with a wear-resistant coating, such as a tungsten carbide coating, to reduce wear during long-term use and to facilitate resistance to displacement between adjacent coils 2 by friction, while the preload 34 also resists this displacement. In other alternative implementations, the preload 34 can also be made of screws.

[0058] As a preferred embodiment, the threaded holes can be symmetrically distributed at both ends of the connecting plate 33, and the number of pre-tightening members 34 can be adjusted according to the size of the connecting plate 33 and the force requirements. For example, 3-6 pre-tightening members 34 can be provided at the end of each connecting plate 33.

[0059] With this structure, stable support is achieved between adjacent coils 2 through the connecting component 3. When relative displacement occurs between adjacent coils 2 due to the contraction of the magnet, the connecting plate 33 between the first fixing seat 31 and the second fixing seat 32 deforms to accommodate the displacement between the coils 2, while also resisting the displacement. The contact pressure is maintained by the wedge-shaped fit between the groove and the connecting plate 33, and the pre-tightening member 34 ensures connection stability. Thus, this structure can effectively resist the displacement of the coils 2 and avoid excessive stress. At the same time, the multiple circumferentially arranged connecting components 3 can form a stable force transmission path, ensuring the overall rigidity of the magnet structure. Therefore, the adaptability to thermal deformation can be significantly improved while ensuring connection reliability.

[0060] Further, refer to Figure 6In this stellarator magnet, the sliding support 51 and the rotating support 52 are rotatably connected by a rotating shaft assembly 6. The rotating support 52 includes a support column 521 and a rotating plate 522. The top end of the support column 521 is fixedly connected to a corresponding coil 2, and the rotating plate 522 is fixedly connected to the bottom end of the support column 521. The rotating plate 522 has a first axial hole extending through its thickness direction. The sliding support 51 includes a base plate 511 and a first upright plate 512 and a second upright plate 513 spaced apart from each other. The base plate 511 is slidably connected to the top end of the base 4 along the radial direction of the connecting ring 1. The bottom ends of the first upright plate 512 and the second upright plate 513 are fixedly mounted on the base plate 511, and both the first upright plate 512 and the second upright plate 513 have a second axial hole corresponding to the first axial hole. The rotating plate 522 is located between the first upright plate 512 and the second upright plate 513. The rotating shaft assembly 6 passes through the first and second axial holes to rotatably connect the sliding support 51 and the rotating support 52 together. The axes of the first shaft hole and the second shaft hole constitute the first axis.

[0061] In a preferred embodiment, a support flange is provided at the bottom of the support column 521, and a support plate is provided at the top of the rotating plate 522. The support column 521 is connected to the support plate through the support flange, thereby connecting the support column 521 and the rotating plate 522. The top of the support column 521 is fixed to the coil 2 by welding.

[0062] With this structure, the sliding support 51 and the rotating support 52 are rotatably connected via the rotating shaft assembly 6, allowing the rotating support 52 to rotate relative to the sliding support 51 about a first axis. Simultaneously, the sliding support 51 can slide radially along the connecting ring 1. Through the cooperation of the sliding support 51 and the rotating support 52, the radial and axial displacement requirements of the coil 2 can be met.

[0063] Further, refer to Figure 7 In this stellarator magnet, the rotating shaft assembly 6 includes a connecting shaft 61, which is configured as a stepped shaft and includes a first shaft segment, a second shaft segment, and a third shaft segment that are sequentially connected along its axial direction and whose diameters gradually decrease. Figure 7The shaft assembly 6 is arranged sequentially from right to left. The end face of the first shaft segment near the second shaft segment abuts against the side of the first vertical plate 512 away from the rotating plate 522. The second shaft segment passes through the second shaft hole of the first vertical plate 512, and the third shaft segment passes through the first shaft hole of the rotating plate 522 and the second shaft hole of the second vertical plate 513. Furthermore, the shaft assembly 6 also includes a first sleeve 62, a second sleeve 63, and a retaining ring 64. The first sleeve 62, the second sleeve 63, and the retaining ring 64 are respectively sleeved on the outer wall surface of the third shaft segment in the connecting shaft 61, and abut against it sequentially in the axial direction of the connecting shaft 61. The end face of the first sleeve 62 away from the second sleeve 63 abuts against the end face of the second shaft segment near the third shaft segment. In the radial direction of the connecting shaft 61, the first sleeve 62 is pressed between the outer wall surface of the third shaft segment and the inner wall surface of the first shaft hole, and the second sleeve 63 is pressed between the outer wall surface of the third shaft segment and the inner wall surface of the second shaft hole in the second vertical plate 513.

[0064] The rotating plate 522 has a stepped shaft hole, comprising a first hole segment and a second hole segment connected sequentially along its axial direction with gradually decreasing diameters. The first sleeve 62 comprises a first cylinder, a second cylinder, and a third cylinder connected sequentially along its axial direction. The second cylinder protrudes from the outer wall surfaces of the first and third cylinders. The end face of the first cylinder away from the second cylinder abuts against the end face of the second shaft segment near the third shaft segment. The end face of the third cylinder away from the second cylinder abuts against the second sleeve 63. The outer wall surface of the second cylinder abuts against the inner wall surface of the first hole segment, and the outer wall surface of the third cylinder abuts against the inner wall surface of the second hole segment. Furthermore, the rotating shaft assembly 6 also includes a clamping ring 65, which is sleeved on the outer wall of the first cylinder in the first sleeve 62 and includes a first clamping part and a second clamping part connected sequentially along its axial direction. The first clamping part protrudes from the outer wall of the second clamping part, and the end face of the first clamping part near the second clamping part abuts against the end face of the rotating plate 522 near the first vertical plate 512. The second clamping part is pressed between the outer wall of the first cylinder and the inner wall of the first hole section in the radial direction of the connecting shaft 61. The first clamping part is fixed to the rotating plate 522 by fasteners 66, so that the end face of the second clamping part away from the first clamping part is pressed against the end face of the second cylinder near the first cylinder, and the end face of the second cylinder away from the first cylinder is pressed against the end face of the first hole section near the second hole section. The outer wall surface of the second sleeve 63 abuts against the inner wall surface of the second shaft hole in the second vertical plate 513. The outer wall surface of the second sleeve 63 away from the first sleeve 62 is provided with a protrusion. In the axial direction of the connecting shaft 61, the protrusion is pressed between the fixing ring 64 and the side of the second vertical plate 513 away from the rotating plate 522.

[0065] Specifically, the stepped shaft design of the connecting shaft 61 facilitates axial positioning and radial support. The first shaft segment's engagement with the fixing ring 64 restricts the axial displacement of the connecting plate 33, the first vertical plate 512, and the second vertical plate 513. The second and third shaft segments, respectively, engage with the connecting plate 33, the first vertical plate 512, and the second vertical plate 513 to achieve radial positioning. The first sleeve 62 employs a three-cylinder structure, with a protrusion in the second cylinder achieving a double engagement with the stepped hole, ensuring both axial clamping force transmission and radial clearance compensation. The clamping ring 65 includes a first clamping part and a second clamping part. The first clamping part first achieves axial fixation, and the second clamping part completes radial clamping. The second sleeve 63 is L-shaped, with its protrusion forming an axial constraint with the fixing ring 64, preventing loosening of the connection between the rotating shaft assembly 6 and the connecting plate 33, the first vertical plate 512, and the second vertical plate 513. In a preferred embodiment, the second cylinder of the first sleeve 62 can be configured as an elastically deformable structure, thereby generating radial deformation during the clamping process to compensate for machining errors. Furthermore, the third cylinder can be made of copper alloy to reduce the coefficient of friction, and the second clamping part can be provided with a corrugated contact surface to enhance the anti-loosening effect.

[0066] During assembly, first fix the first sleeve 62 in the shaft hole of the rotating plate 522, then install the clamping ring 65 and tighten it using the fastener 66. Next, install the second sleeve 63 in the shaft hole of the second vertical plate 513. Then, insert the connecting shaft 61 into the first sleeve 62 and the second sleeve 63, and tighten the retaining ring 64.

[0067] This structure, with its stepped shaft and stepped hole, along with the first sleeve 62, the second sleeve 63, and the clamping ring 65, effectively improves the load-bearing capacity and stability of the rotating shaft assembly 6, preventing loosening or wear caused by rotation or sliding. It also achieves a stable and reliable rotational connection between the rotating support 52 and the sliding support 51. The fit between the stepped shaft and the stepped hole solves the axial movement problem inherent in traditional single-diameter rotating shafts. The layered clamping design of the sleeve assembly effectively disperses stress concentration, and the fit between the protrusion and the fixing ring 64 prevents axial loosening during operation. This significantly improves connection rigidity and positioning accuracy while ensuring rotational flexibility. When applied to the support structure of a stellarator magnet to support it, it enhances the stability of the stellarator magnet's operation.

[0068] Further, refer to Figure 7 In this stellarator magnet, the connecting shaft 61 is a stud, the fastener 66 is a screw, and the retaining ring 64 is a nut. Furthermore, refer to... Figure 6A fixing component is provided at the top of the base 4 corresponding to the position of the sliding support 51. The fixing component includes a fixing plate 41 and a pressure plate 42. One side of the fixing plate 41 is fixedly connected to the top of the base 4, and the other side is provided with a guide rail. The base plate 511 is slidably connected in the guide rail. The pressure plate 42 is stepped, and the bottom end of the pressure plate 42 is fixedly connected to the fixing plate 41. The top end of the pressure plate 42 is located on the side of the base plate 511 away from the fixing plate 41, forming a space between the pressure plate 42 and the fixing plate 41 for the base plate 511 to slide.

[0069] Specifically, the connecting shaft 61 adopts a stud structure, which facilitates axial fixation via a nut. Furthermore, the stud's simple structure and ease of manufacturing reduce processing costs. The fastener 66 uses screws, improving assembly efficiency and ensuring a reliable connection between the rotating support 52 and the sliding support 51. The retaining ring 64 uses a nut structure, enabling axial pre-tightening through threaded engagement, thereby eliminating assembly clearances in the rotating shaft assembly 6. Further, the stepped design of the pressure plate 42 restricts the displacement of the base plate 511 within the guide rail, guides the sliding of the base plate 511, and retains sufficient sliding space. As a preferred embodiment, a lubricating material layer, such as a wear-resistant MoS2 coating, can be applied to the guide rail surface to reduce sliding friction resistance.

[0070] As a preferred implementation, the bottom end of the pressure plate 42 is provided with a threaded hole, and the pressure plate 42 and the fixing plate 41 are fixed by bolts to the threaded hole, so as to improve the convenience and efficiency of disassembly and assembly.

[0071] This structure simplifies the axial fixing method through the use of studs and nuts, reducing the requirements for machining accuracy. Furthermore, the stepped pressure plate 42 effectively prevents axial movement of the support assembly 5 while ensuring sliding freedom, and also guides the base plate 511.

[0072] Further, refer to Figure 8 In this stellarator magnet, the base 4 includes a support beam 43 and a plurality of support columns 44. The support beam 43 extends along the circumferential direction of the connecting ring 1, and the plurality of support columns 44 are spaced apart along the extension direction of the support beam 43. The top end of each support column 44 is fixedly disposed on the lower side of the support beam 43 along its height direction, and the bottom end of each support column 44 is used to support the support surface. The upper side of the support beam 43 along its height direction constitutes the top end of the base 4.

[0073] Specifically, the support beam 43 can adopt a ring-shaped or segmented structure, preferably made of high-strength steel or aluminum alloy to withstand the centripetal force generated by the coil system. Multiple support columns 44 are evenly distributed circumferentially, their number determined by the magnet size and load, typically one support column 44 corresponding to every 2-4 coils 2. The support columns 44 are fixed to the support beam 43 by welding or bolts, and leveling shims can be installed at the bottom to accommodate height differences in different support surfaces. As a preferred embodiment, reinforcing ribs can be provided inside the support beam 43 to improve bending stiffness, and the support columns 44 can adopt a hollow tube structure to reduce weight.

[0074] As a preferred implementation, each support column 44 is connected to the support surface via a flange to improve connection convenience and reduce costs. The flange is made of stainless steel and has bolt holes along its thickness. As another preferred implementation, the support column 44 is designed in a cylindrical shape to more evenly and stably withstand shear stress. The material of the support column 44 is Inconel 718. Furthermore, both ends of the support column 44 are connected to the flange and the support beam 43 by welding, respectively. To ensure connection stability, argon arc welding is preferred. As a preferred implementation, the support beam 43 is an I-beam made of stainless steel, thus providing good support and achieving weight reduction.

[0075] As a preferred implementation, one side of the fixing plate 41 is welded to the top of the support beam 43.

[0076] With this structure, by extending the support beam 43 circumferentially along the connecting ring 1, the centripetal force generated by the coil 2 can be evenly transmitted to each support column 44, thereby avoiding local stress concentration. Furthermore, the arrangement of multiple support columns 44 enhances the overall stability of the base 4, preventing structural collapse due to single-point failure. The support beam 43 provides a stable plane for the installation of the sliding support 51, ensuring the installation accuracy of the support components 5 corresponding to each coil 2.

[0077] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A stellarator magnet, characterized in that, include: Connecting ring; Multiple coils are arranged in a ring at intervals on the outer periphery of the connecting ring, and the outer wall surface of each coil is fixedly connected to the outer wall surface of the connecting ring; any two adjacent coils are arranged at intervals along one surface of their thickness direction, and a connecting component is connected between the opposing surfaces of any two adjacent coils, and the two ends of the connecting component are respectively fixedly connected to the two opposing surfaces of the two coils; A base, the bottom end of which is used to support a support surface along its height direction, and a support component is connected to the top end of the base along its height direction for the outer wall surface of each coil, so that the base supports the corresponding coil through each support component; Each of the support components includes a sliding support and a rotating support disposed on the sliding support. The sliding support is slidably connected to the top end of the base along the radial direction of the connecting ring, so that the sliding support can move relative to the base within a second distance threshold range. The rotating support is fixedly connected to the corresponding outer wall surface of the coil and can rotate relative to the sliding support about a first axis. The first axis is perpendicular to the radial and axial directions of the connecting ring, and the axial direction of the connecting ring is parallel to the height direction of the base. The sliding support and the rotating support are rotatably connected by a rotating shaft assembly. The rotating support includes a support column and a rotating plate. The top end of the support column is fixedly connected to the corresponding coil, and the rotating plate is fixedly connected to the bottom end of the support column. The rotating plate has a first axial hole that extends through its thickness direction. The sliding support includes a base plate and a first upright plate and a second upright plate arranged at a distance from each other. The base plate is slidably connected to the top of the base along the radial direction of the connecting ring. The bottom ends of the first upright plate and the second upright plate are fixedly disposed on the base plate, and both the first upright plate and the second upright plate have a second shaft hole corresponding to the first shaft hole. The rotating plate is located between the first upright plate and the second upright plate. The rotating shaft assembly passes through the first shaft hole and the second shaft hole to rotatably connect the sliding support and the rotating support together. The axes of the first shaft hole and the second shaft hole constitute the first axis. The rotating shaft assembly includes a connecting shaft, which is configured as a stepped shaft and includes a first shaft segment, a second shaft segment, and a third shaft segment that are connected sequentially along its axial direction and whose diameters gradually decrease. The end face of the first shaft segment near the second shaft segment abuts against the side of the first upright plate away from the rotating plate. The second shaft segment passes through the second shaft hole of the first upright plate. The third shaft segment passes through the first shaft hole of the rotating plate and the second shaft hole of the second upright plate. The rotating shaft assembly further includes a first sleeve, a second sleeve, and a retaining ring. The first sleeve, the second sleeve, and the retaining ring are respectively sleeved on the outer wall surface of the third shaft segment in the connecting shaft and abut against each other in the axial direction of the connecting shaft. The end face of the first sleeve away from the second sleeve abuts against the end face of the second shaft segment near the third shaft segment. In the radial direction of the connecting shaft, the first sleeve is pressed between the outer wall surface of the third shaft segment and the inner wall surface of the first shaft hole, and the second sleeve is pressed between the outer wall surface of the third shaft segment and the inner wall surface of the second shaft hole in the second vertical plate; wherein, the first shaft hole of the rotating plate is configured as a stepped hole, and includes a first hole segment and a second hole segment connected sequentially along its axial direction with gradually decreasing diameters; the first sleeve includes a first cylinder, a second cylinder, and a third cylinder connected sequentially along its axial direction, the second cylinder protruding from the outer wall surface of the first cylinder and the outer wall surface of the third cylinder, the end face of the first cylinder away from the second cylinder abutting against the end face of the second shaft segment near the third shaft segment, and the end face of the third cylinder away from the second cylinder abutting against the second sleeve; the outer wall surface of the second cylinder abuts against the inner wall surface of the first hole segment. The outer wall surface of the third cylinder abuts against the inner wall surface of the second hole section; the rotating shaft assembly further includes a clamping ring, which is sleeved on the outer wall surface of the first cylinder in the first sleeve, and includes a first clamping part and a second clamping part connected sequentially along its axial direction. The first clamping part protrudes from the outer wall surface of the second clamping part, and the end face of the first clamping part near the second clamping part abuts against the end face of the rotating plate near the first vertical plate. The second clamping part is pressed radially between the outer wall surface of the first cylinder and the inner wall surface of the first hole section on the connecting shaft, and the first clamping part is fixed to the rotating plate by fasteners, so that the end face of the second clamping part away from the first clamping part is pressed against the end face of the second cylinder near the first cylinder, and the end face of the second cylinder away from the first cylinder is pressed against the end face of the first hole section near the second hole section; The outer wall surface of the second sleeve abuts against the inner wall surface of the second shaft hole in the second vertical plate. The outer wall surface of the second sleeve away from the first sleeve is provided with a protrusion. In the axial direction of the connecting shaft, the protrusion is pressed between the fixing ring and the side of the second vertical plate away from the rotating plate. The connecting assembly includes a first fixing seat and a second fixing seat disposed opposite to each other, and a connecting plate; The first fixing seat and the second fixing seat are respectively provided with a first groove and a second groove at their close ends. One end of the connecting plate is disposed in the first groove and abuts against the inner peripheral wall of the first groove. The other end of the connecting plate is disposed in the second groove and abuts against the inner peripheral wall of the second groove. The ends of the first fixing seat and the second fixing seat that are far apart from each other are respectively fixedly connected to two surfaces opposite to the two coils, and there is a gap between the opposite ends of the first fixing seat and the second fixing seat; Both ends of the connecting plate are provided with a plurality of threaded holes at intervals. Each threaded hole extends along the thickness direction of the connecting plate. Each threaded hole is provided with a pre-tightening member. The pre-tightening member is threadedly connected to the threaded hole. The pre-tightening member located at one end of the connecting plate can press one end of the connecting plate against the inner peripheral wall of the first groove. The pre-tightening member located at the other end of the connecting plate can press the other end of the connecting plate against the inner peripheral wall of the second groove. The connecting plate has a wedge-shaped cross-section along the circumference of the connecting ring, and both the first groove and the second groove are configured as wedge-shaped grooves adapted to the connecting plate.

2. The stellarator magnet as described in claim 1, characterized in that, Multiple connecting blocks are fixedly provided on the outer wall surface of the connecting ring. The multiple connecting blocks are spaced apart along the circumference of the connecting ring, and each of the multiple connecting blocks corresponds to one of the multiple coils. Each connecting block is fixedly connected to the corresponding coil. The connecting ring includes a plurality of arc-shaped connecting plates that are connected end to end along the circumference of the connecting ring, and the opposite ends of any two adjacent arc-shaped connecting plates are detachably fixedly connected.

3. The stellarator magnet as described in claim 2, characterized in that, Each of the arc-shaped connecting plates has a first connecting flange and a second connecting flange fixedly installed at both ends of its inner wall surface. In any two adjacent arc-shaped connecting plates, the first connecting flange of one arc-shaped connecting plate is fixedly connected to the second connecting flange of the other arc-shaped connecting plate to fix the two arc-shaped connecting plates together. Each of the arc-shaped connecting plates has at least one reinforcing plate on its inner wall surface. Each reinforcing plate extends circumferentially along the connecting ring. The at least one reinforcing plate includes a first reinforcing plate, a second reinforcing plate, and a third reinforcing plate located at the upper, middle, and lower parts of the arc-shaped connecting plate, respectively. Each of the first, second, and third reinforcing plates has reinforcing ribs.

4. The stellarator magnet as described in claim 2, characterized in that, Each of the arc-shaped connecting plates has a first wedge-shaped half-groove and a second wedge-shaped half-groove respectively provided at both ends of its inner wall surface. In any two adjacent arc-shaped connecting plates, the first wedge-shaped half-groove of one arc-shaped connecting plate is arranged opposite to the second wedge-shaped half-groove of the other arc-shaped connecting plate, so that the oppositely arranged first wedge-shaped half-groove and second wedge-shaped half-groove form a wedge-shaped fixing groove. An anti-shear component is provided in the wedge-shaped fixing groove. The anti-shear component includes a screw, a nut, and a wedge block adapted to the wedge-shaped fixing groove. A connecting hole is opened in the middle of the side of the wedge block away from the wedge-shaped fixing groove. The screw is fixed in the connecting hole by the nut. The outer wall surface of the wedge block is in contact with the inner wall surface of the first wedge half groove and the second wedge half groove so that the two adjacent arc-shaped connecting plates are aligned.

5. The stellarator magnet as described in claim 1, characterized in that, A plurality of connecting components are connected between any two adjacent coils, and the plurality of connecting components are arranged at intervals along the circumference of the coils.

6. The stellarator magnet as described in claim 5, characterized in that, The connecting shaft is a stud, and the retaining ring is a nut; A fixing component is provided at the top of the base corresponding to the position of the sliding support; the fixing component includes a fixing plate and a pressure plate, one side of the fixing plate is fixedly connected to the top of the base, and the other side is provided with a guide rail, and the base plate is slidably connected to the guide rail; The pressure plate is stepped, and the bottom end of the pressure plate is fixedly connected to the fixing plate. The top end of the pressure plate is located on the side of the base plate away from the fixing plate, and a space is formed between the pressure plate and the fixing plate for the base plate to slide.

7. The stellarator magnet as described in any one of claims 1-6, characterized in that, The base includes a support beam and a plurality of support columns. The support beam extends along the circumferential direction of the connecting ring, and the plurality of support columns are spaced apart along the extension direction of the support beam. The top end of each support column is fixedly disposed on the lower side of the support beam along its height direction, and the bottom end of each support column is used to support the support surface. The upper side of the support beam along its height direction constitutes the top end of the base.

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