Field excitation type magnetic field focusing device
Through the stacking of small high-temperature superconducting blocks and the optimization of shell design, the problems of preparation difficulty and cooling efficiency of large superconducting blocks are solved, and the compactness and efficient magnetic field enhancement effect of the magnetic field focusing device are achieved.
Patent Information
- Application Number
- CN202411377869.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2024-12-10
AI Technical Summary
Large high-temperature superconducting blocks in existing magnetic field focusing devices are difficult to prepare, resulting in uneven distribution of internal microstructures and the enclosed shell increases the outer diameter, affecting the cooling efficiency and magnetic field focusing effect.
Multiple small high-temperature superconducting blocks are stacked and optimized for epoxy shell design, reducing the outer diameter and enhancing heat dissipation performance. Through the combination of hourglass and hollow cylindrical blocks, the angle and adjustment of the angle and Add heat dissipation and flow conductors to form a closely matched magnetic field focusing device.
The effective convergence of the background magnetic field is achieved within the aperture of the superconducting magnet, and the upper limit of the magnetic field amplitude is increased, so as to avoid superconducting blocks and maintain the compactness of the overall outer diameter.
Smart Images
Figure CN119108177A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a field excitation type magnetic field focusing device, which is applied to the aperture of a superconducting magnet to carry out convergence and constraint of a background magnetic field so as to increase the magnetic field generated by the superconducting magnet. Background Art
[0002] At present, the existing magnetic field focusing device is composed of a large high-temperature superconducting block, epoxy resin, and a copper closed shell. The magnetic field focusing device is placed in the aperture of the superconducting magnet, and the magnetic field focusing device and the superconducting magnet are cooled to the working temperature using a liquid working fluid, and then the superconducting magnet is excited to obtain a magnetic field gain in the central aperture of the magnetic field focusing device. However, the increase in the volume of the superconducting block will greatly increase the difficulty of preparing the superconducting block. At the same time, the increase in the volume of the superconducting block will cause the uniformity of the microstructure distribution inside the block to decrease, resulting in an uneven distribution of the critical current density of the high-temperature superconducting block; the use of two structures to prepare the device shell increases the outer diameter of the device, which is not conducive to the reasonable size matching of the magnetic field focusing device and the superconducting magnet aperture; the closed shell will cause the liquid to have non-direct contact with the high-temperature superconducting block, which is not conducive to cooling, thereby inducing superconducting block quenching. Summary of the invention
[0003] In order to overcome the difficulty in obtaining large high-temperature superconducting blocks in existing magnetic field focusing devices, the two materials lead to an increase in outer diameter and heat dissipation limitations, the present invention provides a field-excited magnetic field focusing device, which uses a plurality of small high-temperature superconducting blocks for stacking and uses epoxy resin for optimizing the shell structure, thereby achieving the purpose of reducing the outer diameter and enhancing the heat dissipation performance.
[0004] The technical solution adopted by the present invention to solve its technical problems is: a field-excitation type magnetic field focusing device, the device includes a base hourglass-shaped high-temperature superconducting block, a middle hollow cylindrical high-temperature superconducting block, a top hourglass-shaped high-temperature superconducting block, a base shell, a middle shell, and a top shell; the base hourglass-shaped high-temperature superconducting block and the base shell are assembled to form a base assembly, the middle hollow cylindrical high-temperature superconducting block and the middle shell are assembled to form a middle assembly, and the top hourglass-shaped high-temperature superconducting block and the top shell are assembled to form a top assembly, and the base assembly, the middle assembly, and the top assembly are assembled in sequence to form a magnetic field focusing device.
[0005] The beneficial effect of the present invention is that the background magnetic field generated by the superconducting magnet can be used to focus the magnetic field under the condition that the aperture of the superconducting magnet is larger than the outer diameter of the magnetic field focusing device, thereby increasing the upper limit of the magnetic field amplitude generated by the superconducting magnet. The base shell, the middle shell, and the top shell can form a close fit with the base hourglass-shaped high-temperature superconducting block, the middle hollow cylindrical high-temperature superconducting block, and the top hourglass-shaped high-temperature superconducting block through separation slits and positioning support walls to avoid sliding; the base assembly, the middle assembly, and the top assembly are assembled through connecting columns and connecting grooves, and the same number of connecting columns and connecting grooves can be set to adjust the relative angle between the assemblies of different parts to adjust the magnetic field focusing effect; connecting columns and connecting grooves are added to the end face of the shell wall to avoid increasing the overall outer diameter of the magnetic field focusing equipment; the base heat dissipation guide holes and the top heat dissipation guide holes are added to enhance the convective heat transfer effect of the cryogenic liquid working medium on the superconducting block to avoid superconducting block quenching. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 It is a schematic diagram of the hourglass-shaped high-temperature superconducting block on the base; Figure 2 It is a schematic diagram of a high-temperature superconducting block with a hollow cylindrical shape in the middle; Figure 3 It is a schematic diagram of the hourglass-shaped high-temperature superconducting block at the top; Figure 4 is a schematic diagram of the base housing; Figure 5 is a schematic diagram of the middle shell; Figure 6 is a schematic diagram of the top shell; Figure 7 It is a schematic diagram of a field excitation magnetic field focusing device.
[0007] In the figure, 1. Hourglass-shaped high-temperature superconducting block of base, 1-1. Separation slit of base, 1-2. Reserved aperture of base, 2. Middle hollow cylindrical high-temperature superconducting block, 2-1. Middle separation slit, 2-2. Middle reserved aperture, 3. Top hourglass-shaped high-temperature superconducting block, 3-1. Top separation slit, 3-2. Top reserved aperture, 4. Base cage-type reserved magnetic field test bracket, 5. Base frame, 6. Middle frame, 7. Top frame, 8. Base outer wall connecting column, 9. Base positioning support wall, 10. Base heat dissipation guide hole, 11. Middle outer wall connecting column, 12. Middle outer wall connecting groove, 13. Middle outer shell reserved aperture, 14. Middle positioning support wall, 15. Top positioning support wall, 16. Top outer wall connecting groove, 17. Top heat dissipation guide hole, 18. Base outer shell, 19. Middle outer shell, 20. Top outer shell. DETAILED DESCRIPTION
[0008] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other. To achieve the above-mentioned purpose, the present invention adopts the following technical scheme.
[0009] The present invention provides a field-excitation magnetic field focusing device, comprising a base hourglass-shaped high-temperature superconducting block 1, a middle hollow cylindrical high-temperature superconducting block 2, a top hourglass-shaped high-temperature superconducting block 3, a base shell 18, a middle shell 19, and a top shell 20. The hourglass-shaped high-temperature superconducting block material 1 of the base, the hollow cylindrical high-temperature superconducting block material 2 of the middle, and the hourglass-shaped high-temperature superconducting block material 3 of the top are all cut and removed at the same angle to form the base separation slit 1-1, the middle separation slit 2-1, and the top separation slit 3-1; the base frame 5, the base positioning support wall 9, the base outer wall connecting column 8, and the base cage-type reserved magnetic field test bracket 4 are integrated to form the base shell 18, and the bottom surface of the base shell 18 is hollowed out to form the base heat dissipation guide hole 10; the middle shell 19 is integrated by the middle frame 6, the middle positioning support wall 14, and the middle outer wall connecting column 11, and the outer wall end face of the middle shell 19 is punched to form the middle outer wall connecting groove 12, and the center of the bottom surface of the middle shell 19 is punched to form the middle shell reserved aperture 13; The skeleton 7 and the top positioning support wall 15 are integrated to form the top shell 20. The top surface of the top shell 20 is hollowed out to form a top heat dissipation guide hole 17. The outer wall end surface of the top shell 20 is punched to form a top outer wall connection groove 16. The base separation slit 1-1 cooperates with the base positioning support wall 9 of the base shell 18 to form a base assembly. The middle separation slit 2-1 cooperates with the middle positioning support wall 14 of the middle shell 19 to form a middle assembly. The top separation slit 3-1 cooperates with the top positioning support wall 15 of the top shell 20 to form a top assembly. The base assembly, the middle assembly, and the top assembly are assembled through the base outer wall connection column 8, the middle outer wall connection groove 12, the middle outer wall connection column 11, and the top outer wall connection groove 16 in sequence to form a magnetic field focusing device. The positioning support wall is closely fitted with the separation slit section of the high-temperature superconducting block material to achieve insulation and support and function. The base cage-type reserved magnetic field test bracket 4 is used to reserve detection sites for installing Hall probes at different positions in the aperture of the magnetic field focusing device. The base outer wall connecting column 8 and the middle outer wall connecting groove 12 are used to connect and control the relative angle of the base shell 18 and the middle shell 19. The middle outer wall connecting column 11 and the top outer wall connecting groove 16 are used to connect and control the relative angle of the middle shell 19 and the top shell 20.
[0010] like Figure 1As shown, the hollow cone in the middle of the base hourglass-shaped high-temperature superconducting block 1 is hollowed out, wherein the base separation slit 1-1 of the base hourglass-shaped high-temperature superconducting block 1 is formed on the side wall of the base hourglass-shaped high-temperature superconducting block 1, which plays a blocking and separation role, separating the complete base hourglass-shaped high-temperature superconducting block 1 into two independent parts, and the base reserved aperture 1-2 of the base hourglass-shaped high-temperature superconducting block 1 reserves space for the base cage-type reserved magnetic field test bracket 4 to extend upward.
[0011] like Figure 2 As shown, the middle part of the central hollow cylindrical high-temperature superconducting block 2 is a hollow cylinder, and the central separation slit 2-1 separates the central hollow cylindrical high-temperature superconducting block 2 into two independent parts. The central reserved aperture 2-2 of the central hollow cylindrical high-temperature superconducting block 2 reserves space for accommodating the base cage-type reserved magnetic field test bracket 4.
[0012] like Figure 3 As shown, the hollow cone in the middle of the top hourglass-shaped high-temperature superconducting block 3 is hollowed out, and the top separation slit 3-1 separates the top hourglass-shaped high-temperature superconducting block 3 into two independent parts. The top reserved aperture 3-2 of the top hourglass-shaped high-temperature superconducting block 3 reserves space for accommodating the base cage-type reserved magnetic field test bracket 4.
[0013] like Figure 4 As described, the base shell 18 is placed outside the base hourglass-shaped high-temperature superconducting block 1, and cooperates with the base hourglass-shaped high-temperature superconducting block 1. The base cage-type reserved magnetic field test bracket 4 is used to place different Hall probes for magnetic field testing. The base outer wall connecting column 8 extends the columnar structure directly from the outer wall to avoid increasing the outer diameter value, and is tightly matched with the middle outer wall connecting groove 12 to form an overall matching structure. In addition, a total of 24 connecting columns are set to perform 15° angle control. The base positioning support wall 9 is used to closely fit with the separation slit 1-1 of the base hourglass-shaped high-temperature superconducting block 1 to avoid sliding of the inner wall. The base positioning support wall 9 is directly stretched and formed from the bottom surface of the base shell 18, and is the same material as the base shell 18. The base heat dissipation guide hole 10 is used for heat dissipation, and is formed by digging holes on the bottom surface of the base shell 18 to facilitate the diversion of low-temperature working fluids, which is beneficial to the heat dissipation of the block material.
[0014] like Figure 5As shown, the middle shell 19 is placed outside the middle hollow cylindrical high-temperature superconducting block 2, and cooperates with the middle hollow cylindrical high-temperature superconducting block 2. The middle outer wall connecting column 11 extends the columnar structure directly from the outer wall, and a total of 24 connecting columns are set to control the angle of 15°. The middle outer wall connecting column 11 is tightly matched with the top outer wall connecting groove 16 to form a matching structure for connection. The middle outer wall connecting groove 12 is also provided with 24 holes to match the number of the base outer wall connecting column 8. The middle shell reserved aperture 2-2 reserves a test space for the base cage type reserved magnetic field test bracket 4. The middle positioning support wall 14 is tightly fitted with the separation slit 2-1 of the middle hollow cylindrical high-temperature superconducting block 2 to avoid sliding, and the middle positioning support wall 14 is also stretched from the bottom of the middle shell 19.
[0015] like Figure 6 As shown, the top shell 20 is placed outside the top hourglass-shaped high-temperature superconducting block 3, and cooperates with the top hourglass-shaped high-temperature superconducting block 3. The top positioning support wall 15 and the separation slit 3-1 of the top hourglass-shaped high-temperature superconducting block 3 form a tight fit to prevent sliding. The top outer wall connection groove 16 is also provided with 24 holes to match the number of the middle outer wall connection column 11. The top heat dissipation guide hole 17 is formed by punching the top surface of the top shell. The top positioning support wall 15 is also stretched from the bottom of the top shell 20.
[0016] like Figure 7 As shown, the schematic diagram of the field-excitation type magnetic field focusing device is shown, after assembling the base hourglass-shaped high-temperature superconducting block 1 and the base shell 18, assembling the middle hollow cylindrical high-temperature superconducting block 2 and the middle shell 19, assembling the top hourglass-shaped high-temperature superconducting block 3 and the top shell 20, assembling and matching in sequence to form the base assembly, the middle assembly and the top assembly, and finally assembling the base outer wall connecting column 8, the middle outer wall connecting groove 12, the middle outer wall connecting column 11, and the top outer wall connecting groove 16 to form the magnetic field focusing device. Figure 7 The embedded measuring leads and Hall probes complete the configuration of the field excitation type magnetic field focusing device, which is placed into the aperture of the superconducting magnet. When the magnet and the field excitation type magnetic field focusing device are completely cooled, the excitation operation is performed to complete the magnetic field focusing.
Claims
1. A field excitation type magnetic field focusing device, characterized in that: The device comprises a base hourglass-shaped high-temperature superconducting block, a middle hollow cylindrical high-temperature superconducting block, a top hourglass-shaped high-temperature superconducting block, a base shell, a middle shell and a top shell; the base hourglass-shaped high-temperature superconducting block and the base shell are assembled to form a base assembly, the middle hollow cylindrical high-temperature superconducting block and the middle shell are assembled to form a middle assembly, and the top hourglass-shaped high-temperature superconducting block and the top shell are assembled to form a top assembly; the base assembly, the middle assembly and the top assembly are assembled in sequence to form a magnetic field focusing device.
2. A field excitation type magnetic field focusing device according to claim 1, characterized in that: The hollow cone in the middle of the hourglass-shaped high-temperature superconducting block material of the base is hollowed out, and a base separation slit is formed on the side wall of the hourglass-shaped high-temperature superconducting block material of the base, separating the hourglass-shaped high-temperature superconducting block material of the base into two independent parts. The base reserved aperture of the hourglass-shaped high-temperature superconducting block material of the base reserves space for the base cage-type reserved magnetic field test bracket to extend upward.
3. A field excitation type magnetic field focusing device according to claim 2, characterized in that: The middle part of the central hollow cylindrical high-temperature superconducting block is a hollow cylinder, and a central separation slit separates the central hollow cylindrical high-temperature superconducting block into two independent parts. The central reserved aperture of the central hollow cylindrical high-temperature superconducting block reserves space for accommodating a base cage-type reserved magnetic field test bracket.
4. A field excitation type magnetic field focusing device according to claim 3, characterized in that: The hollow cone in the middle of the top hourglass-shaped high-temperature superconducting block is hollowed out, and the top separation slit separates the top hourglass-shaped high-temperature superconducting block into two independent parts. The top reserved aperture of the top hourglass-shaped high-temperature superconducting block reserves space for accommodating the base cage-type reserved magnetic field test bracket.
5. A field excitation type magnetic field focusing device according to claim 4, characterized in that: All high-temperature superconducting bulk materials are cut and removed at the same angle to form separation slits.
6. A field excitation type magnetic field focusing device according to claim 4, characterized in that: The base shell includes a base frame, a base positioning support wall, a base outer wall connecting column, and a base heat dissipation guide hole; the middle shell includes a middle frame, a middle positioning support wall, a middle outer wall connecting groove, and a middle outer wall connecting column; the top shell includes a top frame, a top positioning support wall, a top outer wall connecting groove, and a top heat dissipation guide hole.
7. A field excitation type magnetic field focusing device according to claim 6, characterized in that: The base separation slit cooperates with the base positioning support wall of the base shell to form a base assembly; the middle separation slit cooperates with the middle positioning support wall of the middle shell to form a middle assembly; the top separation slit cooperates with the top positioning support wall of the top shell to form a top assembly; the base assembly, middle assembly, and top assembly are assembled in sequence through the base outer wall connecting column, the middle outer wall connecting groove, the middle outer wall connecting column, and the top outer wall connecting groove to form a magnetic field focusing device.
8. A field excitation type magnetic field focusing device according to claim 7, characterized in that: The positioning support wall is closely fitted to the separation slit section to achieve insulation and support.
9. The field excitation type magnetic field focusing device according to claim 7, characterized in that: The base cage-type reserved magnetic field test bracket is placed in the reserved aperture and is used to reserve detection sites for installing Hall probes at different positions in the aperture of the magnetic field focusing device.
10. The field excitation type magnetic field focusing device according to claim 7, characterized in that: The base outer wall connecting column and the middle outer wall connecting groove are used to connect and control the relative angle between the base shell and the middle shell, and the middle outer wall connecting column and the top outer wall connecting groove are used to connect and control the relative angle between the middle shell and the top shell.