A high thermal conductivity superconducting coil with air flow guiding channel

Abstract

The present invention relates to the technical field of superconducting magnets, and in particular to a high-thermal-conductivity superconducting coil with an airflow guide channel, comprising a substrate, a conductor and a drainage mechanism; the conductor is connected to the interior of the substrate, a guide channel is opened inside the substrate along the length direction, the drainage mechanism comprises a driving structure and a reciprocating drainage structure, the driving structure is mounted on the substrate, the reciprocating drainage structure is arranged inside the guide channel, and the driving structure is used to drive the reciprocating drainage structure to move along the length direction of the guide channel; by opening the airflow guide channel and arranging the drainage mechanism, it can be ensured that the hot air flow can flow rapidly along the length direction of the conductor, thereby improving the heat dissipation efficiency, and then effectively managing and controlling the temperature of the coil, preventing local overheating, ensuring the stability of the superconducting state, reducing dependence on external cooling medium, achieving faster and more effective temperature control, and reducing the energy consumption of the system through efficient heat dissipation and cooling design, reducing operating costs, and improving economic efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting magnets, and in particular to a high thermal conductivity superconducting coil with an airflow guiding channel. Background Art

[0002] A superconducting coil is an electromagnetic coil made of superconducting material that conducts electric current without resistance at low temperatures, exhibiting very high current carrying capacity and powerful magnetic field generation capabilities. Superconducting coils can carry higher current densities than conventional wires, making them suitable for applications requiring high currents. Superconducting materials have zero electrical resistance in their superconducting state (i.e., below their critical temperature), so current flowing through the coils does not generate Joule heating losses. However, in actual operation, superconducting coils may generate heat due to AC losses, quenching, dynamic resistance losses, thermal stability issues, and cooling system efficiency issues. These coils typically require cooling using cryogenic coolants such as liquid nitrogen or liquid helium.

[0003] Traditional superconducting coils require complex cooling systems to maintain their superconducting state, which increases the system's volume, weight, and energy consumption. Therefore, simplifying the cooling process and improving its efficiency has become an important research direction.

[0004] How to design the airflow guide channel inside the matrix to ensure that the airflow can be evenly distributed around the superconducting coil to improve heat dissipation efficiency; how to effectively manage and control the temperature of the coil to prevent local overheating and ensure the stability of the superconducting state; while taking into account the characteristics of the superconducting material; ensuring that the design of the airflow guide channel does not affect the mechanical strength and stability of the coil, and avoid deformation or damage under high current and magnetic field; optimizing the channel structure to reduce the flow resistance when the airflow passes through, ensuring that the airflow can circulate effectively without affecting the performance of the coil; ensuring that the system maintains good performance under different working environment conditions (such as temperature and pressure changes) are all technical problems that need to be solved urgently in the existing technology. Summary of the Invention

[0005] The present invention provides a high thermal conductivity superconducting coil with an airflow guide channel, which is used to solve the problems of poor stability, over-reliance on external cooling media and high energy consumption of traditional superconducting coils.

[0006] The present invention provides a high thermal conductivity superconducting coil with an airflow guiding channel, comprising:

[0007] substrate, conductor and drainage mechanism;

[0008] The conductor is connected to the inside of the base, and a guide channel is opened inside the base along the length direction. The drainage mechanism includes a driving structure and a reciprocating drainage structure. The driving structure is installed on the base, and the reciprocating drainage structure is arranged inside the guide channel. The driving structure is used to drive the reciprocating drainage structure to move along the length direction of the guide channel.

[0009] In some embodiments, the conductor is formed by laminating multiple layers of tapes, the outer surfaces of the multiple layers of tapes are coated with a wrapping material, and the space between two adjacent layers of tapes is filled with the wrapping material.

[0010] In some embodiments, the wrapping material is a high thermal conductivity insulating composite material.

[0011] In some embodiments, the material of the tape is a high temperature superconducting material.

[0012] In some of the embodiments, an arcuate groove is provided on the base, and the driving structure is connected to the reciprocating drainage structure via a wire rope passing through the arcuate groove.

[0013] In some of the embodiments, heat dissipation holes and cold air intake holes are provided on the base.

[0014] In some of the embodiments, a guide plate is installed on the inner wall of the base.

[0015] In some embodiments, the drainage direction of the drainage plate is toward the location of the heat dissipation hole.

[0016] In some of the embodiments, a drainage surface is provided on the inner wall of the base.

[0017] In some of the embodiments, the reciprocating flow-guiding structure is disposed directly below the conductor.

[0018] The beneficial effects of the present invention are as follows:

[0019] By providing airflow guide channels and a drainage mechanism, the system ensures rapid heat flow along the length of the conductor, improving heat dissipation efficiency and effectively managing and controlling the coil temperature, preventing local overheating and ensuring the stability of the superconducting state. The selection of suitable thermally conductive materials further enhances thermal conductivity while also taking into account the properties of the superconducting material to ensure that the airflow guide channels do not affect the mechanical strength and stability of the coil, preventing deformation or damage under high currents and magnetic fields. The optimized guide channel structure reduces flow resistance during airflow, ensuring effective air circulation without affecting coil performance, enabling the system to maintain excellent performance under various operating conditions (such as temperature and pressure fluctuations). The self-cooling function reduces dependence on external cooling media and achieves faster and more effective temperature control. The optimized structural design makes the superconducting coil more compact and lightweight, facilitating installation and application in various applications. The efficient heat dissipation and cooling design reduces energy consumption, operating costs, and economic efficiency. The system can quickly respond to temperature changes, improve the ability to maintain superconducting properties, and adapt to transient conditions. The use of fewer external components reduces maintenance complexity and improves system reliability and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagrams of the structures of some specific embodiments of a high thermal conductivity superconducting coil with an airflow guide channel according to the present invention;

[0021] Figure 2 Schematic diagrams of some specific embodiments of a driving structure in a high thermal conductivity superconducting coil with an airflow guide channel according to the present invention;

[0022] Figure 3 yes Figure 2 A schematic structural diagram of a high thermal conductivity superconducting coil with an airflow guiding channel marked A is shown;

[0023] Figure 4 yes Figure 2 Other structural schematic diagrams of a driving structure in a high thermal conductivity superconducting coil with an airflow guiding channel are shown;

[0024] Figure 5 This is a schematic structural diagram of the side surface of a substrate in a high thermal conductivity superconducting coil with an airflow guide channel according to the present invention;

[0025] Figure 6 yes Figure 5 A schematic structural diagram of a high thermal conductivity superconducting coil with an airflow guiding channel shown in FIG.

[0026] In the accompanying drawings, 1. substrate; 2. strip; 3. wrapping material; 4. cold air inlet hole; 5. heat dissipation hole; 6. base A; 7. motor; 8. first coil; 9. first bevel gear; 10. second bevel gear; 11. base B; 12. second coil; 13. rope C; 14. arc groove; 15. rope B; 16. drainage plate; 17. drainage plate; 18. rope A; 19. rope guide ring. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Currently, a superconducting coil is an electromagnetic coil made of superconducting materials. Its characteristic is that it can conduct electric current without resistance at low temperatures, and has a very high current carrying capacity and a strong magnetic field generation capability. Superconducting coils can carry higher current densities than conventional wires and are suitable for applications requiring high currents. Since the resistance is zero, superconducting coils do not generate heat during operation, which improves energy efficiency. To maintain the superconducting state, a low-temperature coolant such as liquid nitrogen or liquid helium is usually required. Ordinary superconducting coils usually rely on external cooling media (such as liquid nitrogen or liquid helium), which has low cooling efficiency and requires a continuous cooling system. The energy consumption required to maintain cooling is high, which increases the overall operating cost. The external cooling system requires regular maintenance and inspection, which increases the complexity and cost of management.

[0029] The present invention aims to develop a high thermal conductivity superconducting coil with an airflow guide channel to solve the existing problem of how to design the airflow guide channel inside the superconducting coil to optimize the airflow path so that it effectively covers the surface of the superconducting coil to maximize the cooling effect.

[0030] To solve the above problems, refer to Figure 1 The present invention provides a high thermal conductivity superconducting coil with an airflow guiding channel, comprising a substrate 1, a conductor and a drainage mechanism;

[0031] The conductor is connected to the upper side of the interior of the base, and a guide channel is opened along the length of the interior of the base. The drainage mechanism includes a drive structure and a reciprocating drainage structure. The drive structure is installed on the base, and the reciprocating drainage structure is arranged inside the guide channel. The drive structure is used to drive the reciprocating drainage structure to move along the length of the guide channel, driving hot air to flow inside the base 1 and quickly cooling the conductor. Liquid curing medium epoxy resin is injected into the base 1. This material is liquid after being prepared or heated and melted. In order to further ensure that the curing medium can be more fully filled inside the base 1, the present invention also pressurizes the curing medium. Under a higher injection pressure, all spaces inside the base 1 are filled with the curing medium. The shell of the base 1 is made of metal material, and its cross-section is circular, which fits the cross-section of the internal airflow guide channel. The cross-section of the base 1 is larger than the cross-section of the conductor. The base 1 is provided with a cavity inside for accommodating the conductor. The shape and size of the cavity match the shape and size of the conductor. Therefore, when the conductor is assembled inside the cavity, the conductor and the base 1 can be tightly connected.

[0032] In the specific scheme adopted in this embodiment, an assembly groove is provided on the surface of the base 1 connected to the conductor. The assembly groove is connected to the cavity, and the width of the assembly groove is slightly smaller than the width of the conductor. During assembly, the assembly groove is first expanded to the same width as the conductor, and then the conductor is pressed into the cavity. Finally, the base 1 is squeezed to restore the assembly groove to its normal size. Since the width of the assembly groove at normal size is smaller than the width of the conductor, the conductor can be tightly confined in the cavity and will not slide out of the cavity.

[0033] Preferably, refer to the attached Figure 1 The conductor is formed by stacking multiple layers of tape 2, each coated with a wrapping material 3. The wrapping material 3 fills the space between adjacent layers of tape 2. The wrapping material 3 between the conductor and the substrate 1 effectively protects the conductor from abnormal wear and tear, while also exhibiting excellent thermal conductivity and insulation properties. The wrapping material between adjacent tapes 2 further protects the tapes, preventing damage or performance degradation due to friction between adjacent tapes 2. This ensures excellent electrical insulation and thermal conductivity, as well as sufficient mechanical strength and low-temperature resistance. After installation, the conductors are compacted. This compaction process allows for the assembly of as many conductors as possible into a cavity of the same size, thereby increasing the conductor fill rate.

[0034] Preferably, refer to the attached Figure 1 , the wrapping material 3 is a high thermal conductivity insulating composite material, the insulating wrapping material is a graphene / carbon nanotube composite material, and similar composite materials can also be aluminum oxide / epoxy resin composite materials, boron nitride / epoxy resin composite materials, aluminum nitride / carbon nanotube composite materials, etc.; the high thermal conductivity insulating composite material adopts graphene / carbon nanotube composite material, which has good electrical insulation properties to prevent short circuits and improve safety. Due to its excellent thermal conductivity, it can help control the temperature of the coil. It has sufficient mechanical strength to maintain the structural stability of the coil. Since superconducting coils usually work in low temperature environments, graphene / carbon nanotube composite materials can withstand low temperatures without losing their electrical properties. In low temperature environments, the thermal expansion coefficient of carbon nanotubes is low, which helps to maintain the structural stability of the material; since the wrapping material 3 also uses a high thermal conductivity composite material, there is no need to introduce helium into the air flow channel to increase costs.

[0035] Preferably, refer to the attached Figure 1The material for ribbon 2 is a high-temperature superconducting material. In this invention, REBCO (rare earth barium copper oxide) is used. REBCO has a high critical temperature and can withstand high current densities. When used in a superconducting coil, it exhibits minimal losses in the superconducting state, improving the overall efficiency of the system. It can be prepared in a variety of ways. The conductor formed by stacking multiple layers of ribbon 2 is shaped after winding, significantly reducing the tensile and compressive stresses generated by bending when winding a coil using conventional CORC cables, achieving high current carrying capacity while reducing mechanical stress in the ribbon. The ribbon can slide during winding, preventing significant stress accumulation even with a large total conductor thickness, thus enabling the winding of small-sized solenoids. The width, thickness, and length of each layer of ribbon 2 can be the same or different. When the width of each layer of ribbon 2 is the same, the conductor cross-section is rectangular, while when the width varies, the conductor cross-section has other shapes. Therefore, the width of each layer of ribbon 2 can be determined based on the required conductor cross-section.

[0036] Preferably, refer to the attached Figure 1 , attached Figure 2 , attached Figure 3 , attached Figure 4 , Attachment Figure 5 and attached Figure 6 , an arcuate groove 14 is provided on the base, and the driving structure is connected to the reciprocating drainage structure by a rope passing through the arcuate groove 14;

[0037] Specifically, the driving structure includes a base A6, a motor 7, a first coil 8, a first bevel gear 9, a second bevel gear 10, a base B11, a second coil 12 and a rope A18; wherein the base A6 is fixedly mounted on one end of the base 1, the base B11 is fixedly mounted on the other end of the base 1, the motor 7 is fixedly mounted on the base A6, the output end of the motor 7 is fixedly connected to the first bevel gear 9, the first coil 8 is rotatably connected to the base A6, and the second bevel gear 10 is fixedly mounted at the center of the upper surface of the first coil 8, the first bevel gear 9 is meshed with the second bevel gear 10, the second coil 12 is mounted on the base B11, the rope A18 is wound around the first coil 8 and the second coil 12, and one end of the rope C13 is connected to the rope A18, and the other end of the rope C13 is connected to the reciprocating drainage structure;

[0038] Specifically, the reciprocating drainage structure is a drainage piece 16 with an arc-shaped cross-section, two arc-shaped grooves 14 are opened on the base 1, and the number of ropes B15 is also two. One end of the two ropes B15 is connected to the rope C13, and the other end passes through different arc-shaped grooves 14 to connect to the drainage piece 16. In actual application, the superconducting coil needs to be wound. Therefore, in the technical solution of the present invention, multiple groups of rope guide rings 19 are also installed on the base 1. The rope A18 passes through the multiple groups of rope guide rings 19 in sequence, so that after the superconducting coil is wound, the rope A18 is still distributed along the length direction of the base 1. In specific application, it is only necessary to turn on the motor 7 to drive the first coil 8 to rotate. The first coil 8 drives the second coil 12 to rotate through the rope A18, so that the rope C13 makes a reciprocating motion along the length direction of the base 1, and the rope C drives the drainage piece 16 inside the base 1 to make a reciprocating motion to achieve the drainage effect.

[0039] Preferably, refer to the attached Figure 5 The base is provided with heat dissipation holes 5 and cold air inlet holes 4. Due to the "chimney effect", hot air will flow upward. Therefore, in the technical solution of the present invention, the heat dissipation holes 5 are opened on the side of the base 1, and multiple heat dissipation holes 5 are opened. The multiple heat dissipation holes 5 are distributed along the length direction of the base 1, and the cold air inlet holes 4 are opened at the bottom of the base 1 and distributed along the length direction of the base 1.

[0040] Preferably, refer to the attached Figure 1 The inner wall of the base is installed with a guide plate 17, and the guide plates 17 are distributed circumferentially along the inner wall of the base 1. At the same time, multiple groups of circumferentially distributed guide plates 17 are also arranged along the length direction of the base 1.

[0041] Preferably, the drainage direction of the drainage plate is toward the location of the heat dissipation hole, so that the hot air can be quickly discharged from the heat dissipation hole 5.

[0042] Preferably, a drainage surface is provided on the inner wall of the base. The drainage surface in the technical solution of the present invention is a saddle surface. The shape of the saddle surface can effectively guide the airflow and make it evenly distributed inside the superconducting coil, reducing dead zones and airflow retention. This shape can increase the contact area between the airflow and the superconducting material, thereby improving the heat exchange efficiency and promoting the cooling effect. It can also better adapt to the geometric shape of the superconducting coil and optimize space utilization. Due to the change in the curvature of the saddle shape, the velocity and pressure distribution of the airflow can be reasonably adjusted, which helps to maintain a stable cooling environment.

[0043] Preferably, the reciprocating drainage structure is arranged directly below the conductor, so that the drainage plate 16 can drain the hot air in a timely manner.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0047] In the present invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0048] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high thermal conductivity superconducting coil with an airflow guide channel, characterized in that: include: substrate, conductor and drainage mechanism; The conductor is connected to the interior of the base, and a guide channel is opened inside the base along the length direction. The drainage mechanism includes a driving structure and a reciprocating drainage structure. The driving structure is installed on the base, and the reciprocating drainage structure is arranged inside the guide channel. The driving structure is used to drive the reciprocating drainage structure to move along the length direction of the guide channel. The base body is provided with an arc-shaped groove, and the driving structure is connected to the reciprocating drainage structure via a wire rope passing through the arc-shaped groove; The driving structure includes a base A, a motor, a first coil, a first bevel gear, a second bevel gear, a base B, a second coil and a rope A; Among them, the base A is fixedly mounted on one end of the base, the base B is fixedly mounted on the other end of one end of the base, the motor is fixedly mounted on the base A, the output end of the motor is fixedly connected to the first bevel gear, the first coil is rotatably connected to the base A, and the second bevel gear is fixedly mounted at the center of the upper surface of the first coil, the first bevel gear is meshed with the second bevel gear, the second coil is mounted on the base B, the rope A is wound around the first coil and the second coil, and one end of the rope C is connected to the rope A, and the other end of the rope C is connected to the reciprocating drainage structure; The reciprocating drainage structure is a drainage piece with an arc-shaped cross section. There are two arc-shaped grooves on the base body, and there are also two wire ropes B. One end of the two wire ropes B is connected to the wire rope C, and the other end passes through different arc-shaped grooves and is connected to the drainage piece. The base is provided with heat dissipation holes and cold air intake holes; A guide plate is installed on the inner wall of the base; The drainage direction of the drainage plate is toward the location of the heat dissipation hole; The reciprocating drainage structure is arranged directly below the conductor.

2. The high thermal conductivity superconducting coil with an airflow guide channel according to claim 1, characterized in that: The conductor is formed by stacking multiple layers of tapes, the outer surfaces of the multiple layers of tapes are coated with a wrapping material, and the space between two adjacent layers of tapes is filled with the wrapping material.

3. The high thermal conductivity superconducting coil with airflow guide channel according to claim 2, characterized in that: The wrapping material is a high thermal conductivity insulation composite material.

4. The high thermal conductivity superconducting coil with airflow guide channel according to claim 2, characterized in that: The material of the strip is high-temperature superconducting material.

5. The high thermal conductivity superconducting coil with airflow guiding channel according to claim 1, characterized in that: The inner wall of the base body is provided with a drainage surface.

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