High-efficiency heat-conducting dipping structure of high-temperature superconducting magnet

Abstract

The invention discloses an efficient heat-conducting impregnation structure of a high-temperature superconducting magnet, and belongs to the technical field of high-temperature superconducting magnet impregnation. The efficient heat-conducting impregnation structure comprises a magnet base, and a central column is arranged on the magnet base; one end of the central column away from the magnet base is connected with a connecting piece; two insulating plates are fixedly arranged between the connecting piece and the magnet base in a sleeving manner; the plurality of high-temperature superconducting magnet coil components are arranged between the two insulating plates; the plurality of high-temperature superconducting magnet coil components are sequentially laminated and sleeved on the central column, and are connected with the central column through the coil framework; the plurality of heat conduction parts are arranged on the high-temperature superconducting magnet coil parts in a one-to-one correspondence manner so as to perform heat conduction on the high-temperature superconducting magnet coil parts; and the copper terminal is arranged between the outermost layer of high-temperature superconducting magnet coil component and the insulating plate, and is connected with an outer side current lead, so that current forms a closed loop. According to the efficient heat-conducting impregnation structure of the high-temperature superconducting magnet, heat can be quickly conducted out, and damage caused by heat accumulation is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of high-temperature superconducting magnet impregnation, and in particular relates to a high-efficiency heat-conducting impregnation structure of a high-temperature superconducting magnet. Background Art

[0002] High-temperature superconducting magnets have been widely used in the fields of nuclear magnetic resonance imaging (NMR), particle accelerators, nuclear fusion devices, and high-power electrical equipment due to their excellent high current density and strong magnetic field performance. As a key technology in modern science and engineering, the high-field strength and high current density environment of high-temperature superconducting magnets during operation place 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 purpose is to provide mechanical support, fill the gaps in the superconducting windings, form an overall structure through resin curing, and enhance the mechanical stability of the coils; enhance insulation performance: effectively isolate the winding layers to prevent electrical breakdown. However, the traditional insulation and impregnation process has some technical defects, which affect the long-term reliability and thermal stability of the magnets. In addition, the traditional epoxy resin impregnation method has problems such as insufficient thermal conductivity, uneven impregnation, and thermal expansion mismatch. These problems limit its application and may lead to inefficient thermal management and reduced structural reliability. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a high-efficiency heat-conducting impregnation structure of a high-temperature superconducting magnet, which adopts the following technical solutions:

[0005] A high-efficiency heat-conducting impregnation structure for a high-temperature superconducting magnet, comprising:

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

[0007] A plurality of high-temperature superconducting magnet coil components, wherein the plurality of high-temperature superconducting magnet coil components are arranged between the two insulating plates; the plurality of high-temperature superconducting magnet coil components are sequentially stacked and sleeved on the central column, and connected to the central column through a coil skeleton;

[0008] A plurality of heat-conducting components, wherein the plurality of heat-conducting components are arranged on the high-temperature superconducting magnet coil component in a one-to-one correspondence to conduct heat to the high-temperature superconducting magnet coil component;

[0009] A copper terminal is arranged 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 in sequence; an insulating sheet is arranged between two adjacent layers of the high-temperature superconducting magnet coils, and the insulating sheet is fixedly mounted on the coil frame; the outermost layer of the high-temperature superconducting magnet coil is connected to the heat-conducting component.

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

[0012] Furthermore, the heat-conducting component includes two groups of heat-conducting channel groups; the two groups of heat-conducting channel groups are respectively arranged on the end of the outermost high-temperature superconducting magnet coil away from the insulating sheet; each group of the heat-conducting channel groups includes multiple heat-conducting channels; the multiple heat-conducting channels are evenly arranged on the outer end surface of the outermost high-temperature superconducting magnet coil in a circumferential direction; one end of the heat-conducting channel is connected to the coil frame, and the other end extends to the end away from the coil frame and is connected to the end surface of the high-temperature superconducting magnet coil.

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

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

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

[0016] Beneficial effects:

[0017] The present invention proposes a high-efficiency heat-conducting impregnation structure for a high-temperature superconducting magnet, which can quickly dissipate heat during magnet operation or quenching to prevent damage caused by heat accumulation; in addition, the heat-conducting channel is made of a high-conductivity material, which not only has excellent heat dissipation performance, but also can provide additional mechanical support to resist axial stress during quenching. At the same time, the heat-conducting channel can be used as a cooling path to significantly improve the cooling efficiency during the pre-cooling stage of the magnet; after the magnet is impregnated as a whole, the magnet has good low-temperature and high-field adaptability, which effectively improves the thermal management and operation reliability of the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the internal structure of the high-efficiency heat-conducting impregnation structure of the high-temperature superconducting magnet of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall structure of a high-temperature superconducting magnet coil component of a high-efficiency heat-conducting impregnation structure of a high-temperature superconducting magnet of the present invention;

[0020] Figure 3A cross-sectional view of a high-temperature superconducting magnet coil component of a high-efficiency thermally conductive impregnated structure of a high-temperature superconducting magnet of the present invention;

[0021] Among them, 1. magnet base; 2. insulation plate; 3. copper terminal; 4. high-temperature superconducting magnet coil; 5. insulation sheet; 6. heat conduction channel; 7. coil frame; 8. connector; 9. center column. DETAILED DESCRIPTION

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below.

[0023] Example 1

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

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

[0026] A plurality of high-temperature superconducting magnet coil components, wherein the plurality of high-temperature superconducting magnet coil components are arranged between two insulating plates 2; the plurality of high-temperature superconducting magnet coil components are sequentially stacked and sleeved on the central column 9, and connected to the central column 9 through the coil skeleton 7;

[0027] A plurality of heat-conducting components, wherein the plurality of heat-conducting components are arranged on the high-temperature superconducting magnet coil component in a one-to-one correspondence to conduct heat to the high-temperature superconducting magnet coil component;

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

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

[0030] The copper terminal 3 is preferably made of TU1 oxygen-free copper material.

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

[0032] Preferably, the connecting member 8 is a flange, and the coil skeleton 7 is connected to the magnet base 1 through a center column 9 and supports the flange on the top of the magnet. The flange is also installed on the center 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 arranged between the magnet base 1, the top flange and the copper terminal 3 to achieve electrical insulation; a thread is provided on the top of the center column 9, which is used to cooperate with the internal thread of the flange at the top of the magnet to achieve the tightening and stability of the entire magnet structure.

[0034] Through the above technical solution, the magnet base 1 serves as the basic supporting structure of the overall magnet, responsible for carrying the stacking and nesting assembly of the high-temperature superconducting magnet coil components, the insulating plate 2, the heat-conducting components and related structural parts, 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 serves as an electrical connection medium, connecting 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 multiple layers of high-temperature superconducting magnet coils 4; the multiple layers of high-temperature superconducting magnet coils 4 are stacked in sequence; an insulating sheet 5 is arranged between two adjacent layers of high-temperature superconducting magnet coils 4, and the insulating sheet 5 is fixedly mounted on the coil frame 7; the outermost layer of high-temperature superconducting magnet coil 4 is connected to the heat-conducting component.

[0036] The insulating sheet 5 is made of G10 material, and is disposed between two adjacent layers of high-temperature superconducting magnet coils 4 , and is integrally installed therein 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 groups of heat-conducting channel groups; the two groups of heat-conducting channel groups are respectively arranged on the end of the outermost high-temperature superconducting magnet coil 4 away from the insulating sheet 5; each group of heat-conducting channel groups includes a plurality of heat-conducting channels 6; the plurality of heat-conducting channels 6 are evenly arranged circumferentially on the outer end surface of the outermost high-temperature superconducting magnet coil 4; one end of the heat-conducting channel 6 is connected to the coil skeleton 7, and the other end extends to the end away from the coil skeleton 7, and is connected to the end surface of the high-temperature superconducting magnet coil 4.

[0039] 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 closely attached to the end surface of the high-temperature superconducting magnet coil 4.

[0040] 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] The heat conduction channels 6 on two adjacent high-temperature superconducting magnet coil components are connected one by one.

[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 can provide additional mechanical support to resist the axial stress channel during superconducting, thereby improving the stability of the structure. At the same time, the heat conduction channel 6 can be used as a cooling path to significantly improve 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 outer diameter of the high-temperature superconducting magnet coil 4 minus the inner diameter of the high-temperature superconducting magnet coil 4 .

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

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

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

[0048] Example 2

[0049] This embodiment is based on the embodiment 1, and takes each high-temperature superconducting magnet coil component including two layers of high-temperature superconducting magnet coils 4 as an example. 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 skeleton 7; each heat-conducting component includes two groups of heat-conducting channel groups; the two groups of heat-conducting channel groups are respectively arranged on the end of the high-temperature superconducting magnet coil 4 away from the insulating sheet 5; each group of heat-conducting channel groups includes a plurality of heat-conducting channels 6; the plurality of heat-conducting channels 6 are uniformly 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 skeleton 7, and the other end extends to the end away from the coil skeleton 7, and is connected to the end face of the high-temperature superconducting magnet coil 4.

[0051] The present invention provides a high-efficiency thermally conductive impregnated structure of a high-temperature superconducting magnet, wherein the high-temperature superconducting magnet coil component, the insulating sheet 5 and the thermally conductive channel 6 are all multiple units, which are stacked and nested according to design requirements; the high-temperature superconducting magnet coil 4 located at the bottom and top of the magnet is connected to the copper terminal 3 through the upper and lower ends respectively, and a solder heating process is adopted to achieve reliable electrical connection, and 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 preparing a bridging joint, and all the coils are integrated 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 the structural stability and heat dissipation performance, and is suitable for high field strength and complex operating environments.

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

Claims

1. A highly efficient thermally conductive impregnated structure for a high temperature superconducting magnet, characterized in that: include: A magnet base, wherein a central column is arranged on the magnet base; a connecting piece is connected to one end of the central column away from the magnet base; and two insulating plates are fixedly sleeved between the connecting piece and the magnet base; A plurality of high-temperature superconducting magnet coil components, wherein the plurality of high-temperature superconducting magnet coil components are arranged between the two insulating plates; the plurality of high-temperature superconducting magnet coil components are sequentially stacked and sleeved on the central column, and connected to the central column through a coil skeleton; A plurality of heat-conducting components, wherein the plurality of heat-conducting components are arranged on the high-temperature superconducting magnet coil component in a one-to-one correspondence to conduct heat to the high-temperature superconducting magnet coil component; A copper terminal is arranged 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.

2. The high-efficiency thermal conductive impregnation structure of a high-temperature superconducting magnet according to claim 1, characterized in that: 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 in sequence; an insulating sheet is arranged between two adjacent layers of the high-temperature superconducting magnet coils, and the insulating sheet is fixedly sleeved on the coil frame; the outermost layer of the high-temperature superconducting magnet coil is connected to the heat-conducting component.

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

4. The high-efficiency thermal conductive impregnation structure of a high-temperature superconducting magnet according to claim 2, characterized in that: The heat-conducting component comprises two groups of heat-conducting channel groups; the two groups of heat-conducting channel groups are respectively arranged on one end of the outermost high-temperature superconducting magnet coil away from the insulating sheet; each group of the heat-conducting channel group comprises a plurality of heat-conducting channels; A plurality of heat-conducting channels are uniformly arranged on the outer end surface of the outermost high-temperature superconducting magnet coil in a circumferential direction; one end of the heat-conducting channel is connected to the coil frame, and the other end extends toward an end away from the coil frame and is connected to the end surface of the high-temperature superconducting magnet coil.

5. The high-efficiency heat-conducting impregnation structure of a high-temperature superconducting magnet according to claim 4, characterized in that: The length of the heat conduction channel is greater than the width of the high temperature superconducting magnet coil.

6. The high-efficiency heat-conducting impregnation structure of a high-temperature superconducting magnet according to claim 4, characterized in that: A layer of insulating film is attached to the surface of the heat conduction channel.

7. The high-efficiency heat-conducting impregnation structure of a 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.

Images