A High-Efficiency Thermally Conductive Impregnation Structure for High-Temperature Superconducting Magnets

Abstract

This invention discloses a highly efficient thermally conductive impregnation structure for high-temperature superconducting magnets, belonging to the field of high-temperature superconducting magnet impregnation technology. It includes a magnet base with a central column on it; a connector is connected to one end of the central column away from the magnet base; two insulating plates are fixedly sleeved between the connector and the magnet base; multiple high-temperature superconducting magnet coil components are disposed between the two insulating plates; these coil components are sequentially stacked on the central column and connected to it via a coil frame; multiple thermally conductive components are correspondingly disposed on each coil component to conduct heat; copper terminals are disposed between the outermost coil component and the insulating plate, and connected to an outer current lead to form a closed current loop. This invention provides a highly efficient thermally conductive impregnation structure for high-temperature superconducting magnets, enabling rapid heat dissipation and preventing heat accumulation that could cause damage.

Description

Technical Field

[0001] This invention belongs to the field of high-temperature superconducting magnet impregnation technology, and specifically relates to a high-efficiency thermally conductive impregnation structure for high-temperature superconducting magnets. Background Technology

[0002] High-temperature superconducting magnets, due to their excellent high current density and strong magnetic field performance, have been widely used in fields such as nuclear magnetic resonance imaging (NMR), particle accelerators, nuclear fusion devices, and high-power electrical equipment. As a key technology in modern science and engineering, the high field strength and high current density environment in which high-temperature superconducting magnets operate places extremely high demands on the insulation and structural stability of the magnets.

[0003] Impregnation is an indispensable step in the manufacturing process of high-temperature superconducting magnets. Its main purposes are: to provide mechanical support, fill the gaps in the superconducting windings, form an integral structure through resin curing, and enhance the mechanical stability of the coils; and to enhance insulation performance by effectively isolating the winding layers and preventing electrical breakdown. However, traditional insulation and impregnation processes have some technical defects that affect the long-term reliability and thermal stability of the magnets. Furthermore, traditional epoxy resin impregnation methods suffer from insufficient thermal conductivity, uneven impregnation, and thermal expansion mismatch, which limit their application and may lead to low thermal management efficiency and reduced structural reliability. Summary of the Invention

[0004] To address the above problems, this invention provides a highly efficient thermally conductive impregnation structure for high-temperature superconducting magnets, employing the following technical solution:

[0005] A highly efficient thermally conductive impregnation structure for a high-temperature superconducting magnet includes:

[0006] A magnet base, on which a central column is provided; a connector is connected to one end of the central column away from the magnet base; two insulating plates are fixedly sleeved between the connector and the magnet base;

[0007] Multiple high-temperature superconducting magnet coil components are disposed between two insulating plates; the multiple high-temperature superconducting magnet coil components are sequentially stacked and sleeved on the central column, and connected to the central column through a coil frame;

[0008] Multiple heat-conducting components are disposed one-to-one on the high-temperature superconducting magnet coil component to conduct heat to the high-temperature superconducting magnet coil component;

[0009] A copper terminal is disposed between the outermost high-temperature superconducting magnet coil component and the insulating plate, and is fixedly sleeved on the central column; the copper terminal is connected to the outer current lead to form a closed loop for the current.

[0010] Furthermore, the high-temperature superconducting magnet coil component includes multiple layers of high-temperature superconducting magnet coils; the multiple layers of high-temperature superconducting magnet coils are stacked sequentially; an insulating sheet is provided between two adjacent layers of high-temperature superconducting magnet coils, and the insulating sheet is fixedly sleeved on the coil frame; the outermost layer of high-temperature superconducting magnet coil is connected to the heat-conducting component.

[0011] Furthermore, the outer diameter of the insulating sheet is larger than the outer diameter of the high-temperature superconducting magnet coil.

[0012] Furthermore, the heat-conducting component includes two sets of heat-conducting channel groups; the two sets of heat-conducting channel groups are respectively disposed on the outermost high-temperature superconducting magnet coil at one end away from the insulating sheet; each set of heat-conducting channel groups includes multiple heat-conducting channels; the multiple heat-conducting channels are circumferentially and uniformly disposed on the outer end face of the outermost high-temperature superconducting magnet coil; one end of the heat-conducting channel is connected to the coil frame, and the other end extends away from the coil frame and is connected to the end face of the high-temperature superconducting magnet coil.

[0013] Furthermore, the length of the heat-conducting channel is greater than the width of the high-temperature superconducting magnet coil.

[0014] Furthermore, an insulating film is attached to the surface of the heat conduction channel.

[0015] Furthermore, the copper terminal is provided with a threaded hole, and the copper terminal is connected to the outer current lead through the threaded hole.

[0016] Beneficial effects:

[0017] This invention proposes a highly efficient thermally conductive impregnation structure for high-temperature superconducting magnets. During magnet operation or quench failure, it can rapidly dissipate heat, preventing heat accumulation and damage. Furthermore, the thermally conductive channels are made of highly conductive materials, which not only have excellent heat dissipation performance but also provide additional mechanical support to resist axial stress during quench failure. At the same time, the thermally conductive channels can also serve as cooling paths, significantly improving cooling efficiency during the magnet pre-cooling stage. After overall impregnation, the magnet exhibits good low-temperature and high-field adaptability, effectively improving the magnet's thermal management and operational reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of the high-efficiency thermally conductive impregnation structure of the high-temperature superconducting magnet of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the high-temperature superconducting magnet coil component of the high-temperature superconducting magnet with a high-efficiency thermally conductive impregnated structure according to the present invention.

[0020] Figure 3This is a cross-sectional view of the high-temperature superconducting magnet coil component of the high-temperature superconducting magnet with a highly efficient thermally conductive impregnated structure according to the present invention;

[0021] The components include: 1. Magnet base; 2. Insulating plate; 3. Copper terminal; 4. High-temperature superconducting magnet coil; 5. Insulating sheet; 6. Heat conduction channel; 7. Coil frame; 8. Connector; and 9. Center column. Detailed Implementation

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below.

[0023] Example 1

[0024] Reference Figures 1 to 3 A high-efficiency thermally conductive impregnation structure for a high-temperature superconducting magnet, comprising:

[0025] A magnet base 1 is provided with a central column 9; a connector 8 is connected to one end of the central column 9 away from the magnet base 1; two insulating plates 2 are fixedly sleeved between the connector 8 and the magnet base 1.

[0026] Multiple high-temperature superconducting magnet coil components are arranged between two insulating plates 2; the multiple high-temperature superconducting magnet coil components are stacked and sleeved on the central column 9 in sequence, and connected to the central column 9 through the coil frame 7;

[0027] Multiple heat-conducting components are arranged one-to-one on the high-temperature superconducting magnet coil component to conduct heat to the high-temperature superconducting magnet coil component;

[0028] Copper terminal 3 is disposed between the outermost high-temperature superconducting magnet coil component and the insulating plate 2, and is fixedly sleeved on the central column 9; copper terminal 3 is connected to the outer current lead to form a closed loop of current.

[0029] The magnet base 1 is preferably made of non-magnetic austenitic stainless steel.

[0030] Among them, the copper terminal 3 is preferably made of TU1 oxygen-free copper material.

[0031] Among them, the end of the central column 9 away from the magnet base 1 is connected to a connector 8 to fasten multiple high-temperature superconducting magnet coil components, heat-conducting components, copper terminals 3, and insulating plates 2.

[0032] Preferably, the connector 8 is a flange, and the coil frame 7 is connected to the magnet base 1 through the central column 9 and supports the flange on the top of the magnet. The flange is also installed on the central column 9 of the magnet base 1 to ensure the strength and positioning accuracy of the overall structure.

[0033] Preferably, the insulating plate 2 is made of G10 material and is placed between the magnet base 1, the top flange and the copper terminal 3 to achieve electrical insulation; the top of the central column 9 is provided with a thread, which is used to connect with the internal thread of the flange on the top of the magnet to achieve the fastening and stability of the entire magnet structure.

[0034] Through the above technical solution, the magnet base 1, as the basic support structure of the whole magnet, is responsible for supporting the stacking and nesting assembly of the high-temperature superconducting magnet coil components, insulating plate 2, heat-conducting components and related structural components, ensuring mechanical stability and precise alignment; the insulating plate 2 is located at the bottom and top of the central column 9 of the magnet base 1, and is used to isolate the electrical signal between the copper terminal 3 and the magnet base 1; the copper terminal 3, as the electrical connection medium, connects the high-temperature superconducting magnet coil 4 at the top and the high-temperature superconducting magnet coil 4 at the bottom of the magnet respectively, and the copper terminal 3 is connected to the outer current lead, so that the current forms a closed loop.

[0035] In this embodiment, the high-temperature superconducting magnet coil component includes a multilayer high-temperature superconducting magnet coil 4; the multilayer high-temperature superconducting magnet coil 4 are stacked sequentially; an insulating sheet 5 is provided between two adjacent layers of high-temperature superconducting magnet coil 4, and the insulating sheet 5 is fixedly sleeved on the coil frame 7; the outermost high-temperature superconducting magnet coil 4 is connected to a heat-conducting component.

[0036] Among them, the insulating sheet 5 is made of G10 material and is placed between two adjacent high-temperature superconducting magnet coils 4. It is installed as a whole during the coil winding process.

[0037] In this embodiment, the outer diameter of the insulating sheet 5 is larger than the outer diameter of the high-temperature superconducting magnet coil 4.

[0038] In this embodiment, the heat-conducting component includes two sets of heat-conducting channel groups; the two sets of heat-conducting channel groups are respectively disposed on the outermost high-temperature superconducting magnet coil 4 at the end away from the insulating sheet 5; each set of heat-conducting channel groups includes multiple heat-conducting channels 6; the multiple heat-conducting channels 6 are evenly disposed circumferentially on the outer end face of the outermost high-temperature superconducting magnet coil 4; one end of the heat-conducting channel 6 is connected to the coil frame 7, and the other end extends away from the coil frame 7 and is connected to the end face of the high-temperature superconducting magnet coil 4.

[0039] Among them, the heat conduction channel 6 is made of copper material and is processed as a whole. The surface flatness needs to be controlled to ensure that it can be tightly attached to the end face of the high-temperature superconducting magnet coil 4.

[0040] Among them, the heat conduction channel 6 can be flexibly designed and processed according to the size and heat conduction requirements of the superconducting magnet coil.

[0041] Among them, the heat conduction channels 6 on two adjacent high-temperature superconducting magnet coil components are connected in a one-to-one correspondence.

[0042] Through the above technical solution, the heat conduction channel 6 is connected to the high-temperature superconducting magnet coil 4, which not only has excellent heat dissipation performance, but also provides additional mechanical support, resists the axial stress channel of timeout failure, and improves the stability of the structure. At the same time, the heat conduction channel 6 can serve as a cooling path, significantly improving the cooling efficiency during the magnet pre-cooling stage.

[0043] In this embodiment, the length of the heat conduction channel 6 is greater than the width of the high-temperature superconducting magnet coil 4.

[0044] The width of the high-temperature superconducting magnet coil 4 is the difference between its outer diameter and its inner diameter.

[0045] In this embodiment, an insulating film is attached to the surface of the heat conduction channel 6.

[0046] The insulating film is preferably made of polyimide film, and the surface of the heat conduction channel 6 is treated with polyimide film insulation.

[0047] In this embodiment, the copper terminal 3 is provided with a threaded hole; the copper terminal 3 is connected to the outer current lead through the threaded hole.

[0048] Example 2

[0049] This embodiment is based on Embodiment 1, taking each high-temperature superconducting magnet coil component as an example, which includes two layers of high-temperature superconducting magnet coils 4. The specific high-efficiency heat-conducting impregnation structure of the high-temperature superconducting magnet is as follows:

[0050] Each high-temperature superconducting magnet coil component includes a heat-conducting component and two layers of high-temperature superconducting magnet coils 4. The two layers of high-temperature superconducting magnet coils 4 are connected by an insulating sheet 5, and the insulating sheet 5 is fixedly sleeved on the coil frame 7. Each heat-conducting component includes two sets of heat-conducting channels. The two sets of heat-conducting channels are respectively arranged on the end of the high-temperature superconducting magnet coil 4 away from the insulating sheet 5. Each set of heat-conducting channels includes multiple heat-conducting channels 6. The multiple heat-conducting channels 6 are evenly arranged circumferentially on the end of the high-temperature superconducting magnet coil 4 away from the insulating sheet 5. One end of the heat-conducting channel 6 is connected to the coil frame 7, and the other end extends to the end away from the coil frame 7 and is connected to the end face of the high-temperature superconducting magnet coil 4.

[0051] This invention provides a highly efficient thermally conductive impregnated structure for a high-temperature superconducting magnet. The high-temperature superconducting magnet coil component, insulating sheet 5, and thermally conductive channel 6 are all multiple units, stacked and nested according to design requirements. The high-temperature superconducting magnet coils 4 located at the bottom and top of the magnet are connected to copper terminals 3 at their upper and lower ends respectively, and a reliable electrical connection is achieved by a soldering heating process. The high-temperature superconducting magnet coils 4 in the high-temperature superconducting magnet coil component located in the middle of the central column 9 are connected in series by a bridging connector, integrating all coils into an integral circuit unit, thereby forming a complete high-temperature superconducting magnet system. This design not only ensures the electrical continuity of the magnet, but also improves structural stability and heat dissipation performance, making it suitable for high field strength and complex operating environments.

[0052] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A highly efficient thermally conductive impregnation structure for a high-temperature superconducting magnet, characterized in that, include: A magnet base, on which a central column is provided; a connector is connected to one end of the central column away from the magnet base; two insulating plates are fixedly sleeved between the connector and the magnet base; Multiple high-temperature superconducting magnet coil components are disposed between two insulating plates; the multiple high-temperature superconducting magnet coil components are sequentially stacked and sleeved on the central column, and connected to the central column through a coil frame; Multiple heat-conducting components are disposed one-to-one on the high-temperature superconducting magnet coil component to conduct heat to the high-temperature superconducting magnet coil component; A copper terminal is disposed between the outermost high-temperature superconducting magnet coil component and the insulating plate, and is fixedly sleeved on the central post; the copper terminal is connected to the outer current lead to form a closed loop for the current. The high-temperature superconducting magnet coil component includes multiple layers of high-temperature superconducting magnet coils; the multiple layers of high-temperature superconducting magnet coils are stacked sequentially; an insulating sheet is provided between adjacent layers of high-temperature superconducting magnet coils, and the insulating sheet is fixedly sleeved on the coil frame; the outermost layer of high-temperature superconducting magnet coil is connected to the heat-conducting component; The heat-conducting component includes two sets of heat-conducting channels; the two sets of heat-conducting channels are respectively disposed on the outermost high-temperature superconducting magnet coil at one end away from the insulating sheet; each set of heat-conducting channels includes multiple heat-conducting channels. Multiple heat-conducting channels are circumferentially and evenly arranged on the outer end face of the outermost high-temperature superconducting magnet coil; one end of each heat-conducting channel is connected to the coil frame, and the other end extends away from the coil frame and is connected to the end face of the high-temperature superconducting magnet coil.

2. The high-efficiency thermally conductive impregnation structure of the high-temperature superconducting magnet according to claim 1, characterized in that, The outer diameter of the insulating sheet is larger than the outer diameter of the high-temperature superconducting magnet coil.

3. The high-efficiency thermally conductive impregnation structure of the high-temperature superconducting magnet according to claim 1, characterized in that, The length of the heat-conducting channel is greater than the width of the high-temperature superconducting magnet coil.

4. The high-efficiency thermally conductive impregnation structure of the high-temperature superconducting magnet according to claim 1, characterized in that, An insulating film is attached to the surface of the heat conduction channel.

5. The high-efficiency thermally conductive impregnation structure of the high-temperature superconducting magnet according to claim 1, characterized in that, The copper terminal is provided with a threaded hole, and the copper terminal is connected to the outer current lead through the threaded hole.

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