Spiral groove framework for winding high-temperature superconducting D-type coil

Abstract

The invention provides a spiral groove framework for winding a high-temperature superconducting D-type coil. Electromagnetic performance optimization and efficient heat management are achieved through double-face differential groove design. A spiral groove is formed in the front face of the framework to serve as a coil winding channel, a linear groove is formed in the back face of the framework to construct a liquid helium heat dissipation channel, and the core problems that in the prior art, the coil is insufficient in geometrical shape stability, low in heat dissipation efficiency, limited in process precision and the like are solved. The spiral groove on the front surface of the framework is planned by adopting a precise track, so that each layer of superconducting tape of the cake-type coil is tightly attached along a preset coordinate track, and the gap of the groove is filled with an insulating material, thereby effectively reducing the interlayer discharge risk. The linear groove on the back surface of the framework is optimized through fluid dynamics, and the wide-deep rectangular section design is adopted, so that the flow velocity of liquid helium is increased. According to the invention, spiral track winding and a linear heat dissipation channel are creatively integrated into a single skeleton component, and collaborative improvement of magnetic field uniformity and heat dissipation efficiency is realized in a limited space.

Description

Technical Field

[0001] This invention relates to the field of high-temperature superconductivity technology, specifically to a spiral groove frame for winding high-temperature superconducting D-type coils. Background Technology

[0002] In recent years, high-temperature superconducting technology has been rapidly and widely applied in practical applications, especially in high-power technology. Improving the stability of power systems has become an urgent task in the global power sector. High-temperature superconducting current limiters and transformers are considered the most effective methods to solve this problem and are currently gradually entering the demonstration experimental stage. In magnetic confinement fusion power generation technology, plasma created by strong magnetic fields can effectively confine charged particles, solving the stability problem of nuclear fusion technology. High-temperature superconducting magnets are considered the best solution for this type of technological revolution and have been extensively researched and tested. However, due to the significant limitations in the mechanical properties of the best high-temperature superconducting tapes currently available, the coil winding process for high-temperature superconducting tapes requires extremely high precision. It is essential to ensure that the coils are not bent or damaged, that the insulation is protected, that they do not break, and that the winding tension is maintained. Simultaneously, the design of the winding device plays a crucial role in solving this problem.

[0003] High-temperature superconducting D-type coils commonly employ a series arrangement of multiple sets of double-panel coils. Their superconducting tapes have a flat, thin cross-section, and in the winding process, horizontal winding devices are typically used to achieve precise conductor arrangement and tension control. During manufacturing, the curvature of the tape must be strictly controlled to avoid deterioration of superconducting properties and mechanical damage to the material. It is noteworthy that when transitioning between double-panel structures under tension, especially in stress concentration areas at the junctions, existing technology has not yet developed dedicated equipment to effectively handle these special conditions, which has become a key technical bottleneck restricting process accuracy. To address this problem, this invention designs a spiral groove frame for winding high-temperature superconducting D-type coils. The spiral grooves on the front of the frame serve as channels for coil winding, while the straight heat dissipation grooves on the back of the frame provide cooling channels. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a spiral groove frame for winding high-temperature superconducting D-type coils, which can precisely and rationally arrange the shape of the superconducting tape while also considering heat dissipation. The spiral grooves on the front side of the frame serve as channels for coil winding. During coil winding, the disc-shaped coil is wound tightly against the thin wall of the groove along the spiral grooves, with the gaps filled with insulating material. The straight grooves on the back side of the frame serve as channels for liquid helium heat dissipation during excitation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention proposes a spiral groove frame for winding high-temperature superconducting D-type coils, which ensures that the D-type coil maintains a stable geometric shape during excitation, and the frame can accelerate heat dissipation through the grooves during excitation. The superconducting D-type coil winding frame and winding method include a frame front with spiral grooves and a frame back with multiple straight grooves. The spiral grooves on the frame front serve as channels for coil winding. During coil winding, the disc-shaped coil is wound tightly along the spiral grooves against the thin wall of the grooves, and the gaps are filled with insulating material. The straight grooves on the frame back serve as channels for liquid helium heat dissipation during excitation.

[0007] Furthermore, the spiral grooves on the front of the skeleton serve as channels for coil winding. During the winding of superconducting D-type coils, especially for disc coils, they need to be arranged rationally according to a specific coordinate trajectory. The spiral trajectory is precisely planned according to design requirements to ensure that each layer of wire is tightly attached to a specific surface and forms a consistent and unobstructed spiral structure. Ensuring the wall thickness and surface flatness of the grooves is crucial for the magnetic field uniformity of the disc coil. Insulating material is filled into the gaps to ensure insulation between coils, thereby improving the overall magnetic field stability and safety. The disc coil is wound tightly against the thin wall of the groove along the spiral pattern, which minimizes unnecessary insulating material and structures, improving the overall magnetic field quality. This precise and rational arrangement significantly improves the performance of disc coils in superconducting equipment and facilitates maintenance and upgrades.

[0008] Furthermore, the straight grooves on the reverse side of the skeleton serve as channels for liquid helium heat dissipation during excitation. In superconducting magnet equipment, these straight grooves on the reverse side of the skeleton play a crucial role as channels for liquid helium heat dissipation during excitation. This design effectively increases the gas flow rate downstream of the magnet's temperature, ensuring a sufficiently fast heat dissipation rate during excitation. The straight grooves on the reverse side of the skeleton are carefully designed to facilitate the formation of heat conduction channels and maintain a consistent surface area. The groove design not only needs to consider heat dissipation efficiency but also ensures smooth liquid helium flow. By studying fluid dynamics principles, the designers optimized the geometric parameters between the grooves to make the fluid density change as uniform as possible, minimizing fluid loss and achieving the most efficient heat dissipation. Through computer simulation and experimental verification, the length and width of each straight groove were scientifically determined. This provides sufficient heat conduction channels within a limited space, continuously increasing the gas flow rate inside the magnet and significantly reducing the temperature gradient. This design not only improves magnet performance but also reduces production and maintenance difficulties.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The purpose of this invention is to provide a spiral groove frame for winding high-temperature superconducting D-type coils. When transitioning between double-panel structures under tension, especially in stress concentration areas at the junction, this invention uses a high-current-carrying-rate high-temperature superconducting double-panel coil winding device with a helical groove frame for D-type coil winding to solve the problem of damage in the transition section. Existing technology has not yet developed dedicated equipment to effectively handle such special working conditions, which has become a key technical bottleneck restricting process accuracy. This invention can minimize unnecessary insulation materials and structures, improving the overall magnetic field quality. Through this precise and reasonable arrangement, the performance of the panel coil in superconducting equipment can be significantly improved, providing sufficient heat conduction channels within a limited space, continuously increasing the gas flow rate inside the magnet, and significantly reducing the temperature gradient. Furthermore, it facilitates maintenance and upgrades. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the spiral groove on the front of the skeleton according to an embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of the head end of the skeleton according to an embodiment of the present invention;

[0013] Figure 3 This is a schematic diagram of the tail end of the skeleton according to an embodiment of the present invention;

[0014] Figure 4 This is a schematic diagram of a straight groove on the reverse side of the skeleton according to an embodiment of the present invention. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] This invention provides a spiral groove frame for winding high-temperature superconducting D-type coils, such as... Figure 1As shown, this invention achieves electromagnetic performance optimization and efficient thermal management through a double-sided differentiated groove design. The front of the frame has a spiral groove 1 as a coil winding channel, while the reverse side has straight grooves 2 to construct a liquid helium heat dissipation channel, solving core problems in existing technologies such as insufficient coil geometric stability, low heat dissipation efficiency, and limited process precision. In the technical solution, a D-shaped hole is set in the middle of the spiral groove frame. The spiral groove 1 on the front of the frame surrounds the D-shaped hole, employing precise trajectory planning. Multiple D-shaped grooves of different sizes are connected end-to-end in a spiral pattern. Grooves with a large average radius of curvature can reduce boundary effects. Boundary effects refer to the local magnetic field instability regions that occur in the superconductor when current in the superconducting coil passes through a portion with a smaller radius of curvature due to magnetic field non-uniformity. The D-shaped grooves ensure that each layer of superconducting tape in the disc coil adheres tightly along a predetermined coordinate trajectory. The gaps between the grooves are filled with insulating material, effectively reducing the risk of interlayer discharge. The starting point of the disc coil is connected to the first end 3 of the frame, which is located inside the frame and adopts a fan-shaped design, serving to connect the wire and the magnet. The end of the disc coil is connected to the tail end 4 of the frame. The tail end 4 of the frame is located on the outside of the frame and adopts a fan ring shape, which serves to connect the wire and the magnet.

[0017] The linear groove 2 on the reverse side of the skeleton is optimized for fluid dynamics, employing a wide-deep rectangular cross-section design to increase the liquid helium flow rate and improve heat dissipation efficiency compared to traditional structures. Compared to traditional technologies, this invention innovatively integrates helical trajectory winding and linear heat dissipation channels into a single skeleton component, achieving a synergistic improvement in magnetic field uniformity and heat dissipation efficiency within a limited space. This technology has been successfully applied to the magnet system of nuclear fusion devices, shortening the quench protection response time and demonstrating significant engineering application value.

[0018] In a preferred embodiment of the present invention, the spiral groove 1 on the front of the skeleton serves as a channel for coil winding. During the winding of superconducting D-type coils, especially for disc coils, a reasonable arrangement according to a specific coordinate trajectory is required. The spiral trajectory is precisely planned according to design requirements to ensure that each layer of wire is tightly attached to a specific surface and forms a consistent and unobstructed spiral structure. Ensuring the wall thickness and surface flatness of the groove is crucial for the magnetic field uniformity of the disc coil. Insulating material is filled into the gaps to ensure insulation between coils, thereby improving the overall magnetic field stability and safety. The disc coil is wound tightly against the thin wall of the groove along the spiral, which minimizes unnecessary insulating material and structures, improving the overall magnetic field quality. This precise and reasonable arrangement significantly improves the performance of the disc coil in superconducting equipment and facilitates maintenance and upgrades.

[0019] In a preferred embodiment of the present invention, the straight groove 2 on the reverse side of the skeleton serves as a channel for liquid helium heat dissipation during excitation. In superconducting magnet equipment, the straight groove on the reverse side of the skeleton plays a crucial role as a channel for liquid helium heat dissipation during excitation. This design effectively increases the gas flow rate downstream of the magnet temperature, ensuring a sufficiently fast heat dissipation rate during excitation. The straight groove on the reverse side of the skeleton is carefully designed to facilitate the formation of heat conduction channels and maintain a consistent surface area. The groove design not only needs to consider heat dissipation efficiency but also ensures smooth flow of liquid helium. By studying fluid dynamics principles, the designers optimized the geometric parameters between the grooves: a groove width of 2mm, a depth of 2mm, and a groove spacing of 20mm, making the fluid density change as uniform as possible and minimizing fluid loss, thereby achieving the most efficient heat dissipation. Through computer simulation and experimental verification, the length and width of each straight groove were scientifically determined. This provides sufficient heat conduction channels within a limited space, continuously increasing the gas flow rate inside the magnet and significantly reducing the temperature gradient. This design not only improves magnet performance but also reduces production and maintenance difficulties.

[0020] like Figure 2 The diagram shown is a schematic diagram of the first end 3 of the skeleton according to an embodiment of the present invention; the first end 3 of the skeleton is located on the inner side of the skeleton and adopts a fan-shaped ring, which serves to connect the wire and the magnet.

[0021] like Figure 3 The diagram shown is a schematic diagram of the tail end 4 of the skeleton according to an embodiment of the present invention; the tail end 4 of the skeleton is located on the outside of the skeleton and adopts a fan ring shape, which serves to connect the wire and the magnet.

[0022] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific examples described or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A spiral groove frame for winding high-temperature superconducting D-type coils, characterized in that: The device includes a front side of a skeleton with spiral grooves and a back side of a skeleton with multiple straight grooves. The spiral grooves on the front side of the skeleton serve as channels for coil winding. During coil winding, the disc-shaped coil is wound along the spiral grooves, and the gaps are filled with insulating material. The straight grooves on the back side of the skeleton serve as channels for liquid helium heat dissipation during excitation.

2. The spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 1, characterized in that: The spiral grooves on the front of the skeleton serve as channels for coil winding. During the winding of the superconducting D-type coil, the disc coil is arranged according to the preset D-type trajectory, and the multi-layer D-type grooves are connected end to end by a spiral.

3. The spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 1, characterized in that: The D-shaped groove is 7mm wide and 13mm deep, with a groove spacing of 10mm.

4. The spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 1, characterized in that: The disc-shaped coil is wound along the spiral groove, closely attached to the thin wall of the groove.

5. The spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 1, characterized in that: The straight grooves on the reverse side of the skeleton are 2mm wide, 2mm deep, and 20mm apart.

6. The spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 1, characterized in that: The starting point of the disc coil is connected to the beginning of the frame.

7. The spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 6, characterized in that: The first end of the skeleton is located on the inner side of the skeleton and adopts a fan-shaped ring, which serves to connect the wires and the magnet.

8. The spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 1, characterized in that: The end of the disc coil is connected to the tail end of the frame.

9. The spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 1, characterized in that: The tail end of the skeleton is located on the outside of the skeleton and adopts a fan-shaped ring, which serves to connect the wires and the magnet.

10. A spiral groove frame for winding a high-temperature superconducting D-type coil according to claim 9, characterized in that: A D-shaped hole is set in the middle of the spiral groove skeleton, and the spiral groove on the front of the skeleton surrounds the D-shaped hole.

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