CN114284027A - Portable conduction-cooled high-temperature superconducting magnet - Google Patents
Portable conduction-cooled high-temperature superconducting magnet Download PDFInfo
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- CN114284027A CN114284027A CN202111620667.8A CN202111620667A CN114284027A CN 114284027 A CN114284027 A CN 114284027A CN 202111620667 A CN202111620667 A CN 202111620667A CN 114284027 A CN114284027 A CN 114284027A
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- cold
- temperature superconducting
- superconducting magnet
- guide link
- cold guide
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- 238000005192 partition Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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Abstract
The invention provides a portable conduction-cooled high-temperature superconducting magnet, which comprises a main coil, an adjusting coil, a first Stirling refrigerator, a second Stirling refrigerator, a first cold conduction link, a second cold conduction link, a third cold conduction link, an 80K heat sink plate, a double-cone supporting structure, a vacuum container and a room-temperature hole tube, wherein the main coil is arranged on the main coil; cold fingers of the first Stirling refrigerator and the second Stirling refrigerator extend into the vacuum container at the lower part of the first Stirling refrigerator and are respectively connected with the first cold guide link; the first Stirling refrigerator is connected with one end of a third cold guide link through a first cold guide link, and the other end of the third cold guide link is connected with the partition plate; the second Stirling refrigerator is connected with a second cold guide link through the first cold guide link and the 80K heat sink plate in sequence, and the second cold guide link is connected with a double-cone supporting structure in the vacuum container. The invention adopts the Stirling refrigerator with light weight and low energy consumption as a cold source, and can be applied to a plurality of application occasions which are difficult to be competent by the traditional superconducting magnet by matching with the high-strength low-heat-leakage double-cone supporting structure.
Description
Technical Field
The invention relates to the field of high-temperature superconducting application, in particular to a portable conduction-cooled high-temperature superconducting magnet.
Background
Under the background of the era of energy conservation and emission reduction, the superconducting magnet has wide application prospect in the fields of biological medical treatment, chemistry, materials, energy, traffic and the like due to the advantages of higher magnetic field generation efficiency, lower energy consumption and the like. At present, most common superconducting magnets are low-temperature superconducting magnets, the low-temperature superconducting magnets work in a liquid helium temperature zone, and in order to maintain the low-temperature environment of the low-temperature superconducting magnets, large auxiliary equipment such as low-temperature refrigeration and heat dissipation is required to run uninterruptedly. The energy consumption and the complexity of the superconducting magnet system are increased, and the requirements of some application fields on light weight, portability and low energy consumption of the superconducting magnet are difficult to meet.
The working temperature of the high-temperature superconducting magnet is usually 4.2-50K, the cooling mode depends on the working temperature of the magnet, and the common cooling modes of the high-temperature superconducting magnet include liquid helium soaking, nitrogen fixation soaking, conduction cooling and the like. Compared with liquid soaking and nitrogen fixation soaking, the conduction cooling mode has the advantages of simple structure, easy operation, safe and controllable magnet quenching and the like.
Compared with a low-temperature superconducting magnet, the high-temperature superconducting magnet has higher working temperature, so that the complexity of a low-temperature system is greatly reduced, and the Stirling refrigerator which is light in weight, portable and low in energy consumption can be used for cooling the high-temperature superconducting magnet. The common superconducting magnet mostly adopts a GM refrigerator as a cold source, and because the low-temperature system has a large size and high energy consumption, the superconducting magnet is not suitable for application occasions with higher requirements on light weight, portability and low energy consumption.
The traditional superconducting magnet suspension system mostly adopts a rod-shaped pull rod form, and the pull rod in the form has strong strength and rigidity in the axial direction, but the strength and the rigidity in other directions are obviously insufficient. The superconducting magnet in the highway transportation working condition can bear the impact from all directions, so that the defects of insufficient strength and rigidity of the superconducting magnet in certain directions can be caused, the problem of magnetic axis deviation of the superconducting magnet can be caused if the superconducting magnet is light, and the magnet can be damaged if the superconducting magnet is heavy.
Disclosure of Invention
In order to provide a cooling mode of a high-temperature superconducting magnet with light weight, portability, low energy consumption and simple structure, and improve the rigidity of a suspension structure of the high-temperature superconducting magnet to resist higher-level transportation impact, the invention provides a portable conduction-cooled high-temperature superconducting magnet, which comprises a main coil, an adjusting coil, a first Stirling refrigerator, a second Stirling refrigerator, a first cold conduction link, a second cold conduction link, a third cold conduction link, an 80K heat sink plate, a double-cone supporting structure, a vacuum container and a room-temperature hole pipe. The room temperature hole pipe is fixed on the end plate of the vacuum container and coaxially arranged with the high temperature superconducting coil. One end of the double-cone supporting structure is connected with the high-temperature superconducting coil framework, and the other end of the double-cone supporting structure is fixed on an end plate of the vacuum container; the main coil and the adjusting coil are separated by a partition plate; cold fingers of the first Stirling refrigerator and the second Stirling refrigerator extend into the vacuum container at the lower part of the first Stirling refrigerator and are respectively connected with the first cold guide link; the first Stirling refrigerator is connected with one end of a third cold guide link through a first cold guide link, and the other end of the third cold guide link is connected with the partition plate; the second Stirling refrigerator is connected with a second cold guide link through the first cold guide link and the 80K heat sink plate in sequence, and the second cold guide link is connected with a double-cone supporting structure in the vacuum container.
Furthermore, the main coil and the adjusting coil are wound in a double-cake mode, insulating paint is sprayed on the partition board, the partition board is made of high-purity aluminum plates, and the function of cold conduction is achieved.
Further, the first Stirling refrigerator and the second Stirling refrigerant are both cooled by fans.
Furthermore, the biconical supporting structure is made of a biconical low-thermal-conductivity high-strength composite material.
Furthermore, the first, second and third cold conducting links are all made of high-purity copper stranded wires, and the connecting interface of each cold conducting link, the double-cone supporting structure, the partition plate and the 80K heat sink plate has high insulating strength and low contact thermal resistance.
Furthermore, a heat sink is arranged in the middle of the double-cone supporting structure and is used for being connected with the second cold guide link.
Furthermore, a high-temperature lead seat and a high-temperature superconducting switch are arranged on the 80K heat sink plate to realize the closed-loop operation of the high-temperature superconducting magnet.
Furthermore, the number of the first cold guide links is two, the number of the second cold guide links is two, and the number of the third cold guide links is 4.
Furthermore, the high-temperature superconducting switch is formed by winding a high-temperature superconducting strip and a heating belt in a non-inductive mode and is connected with a coil loop of the high-temperature superconducting magnet in parallel.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention does not need a cold shield structure, and the system structure is greatly simplified.
(2) The two Stirling refrigerators can be powered by mains supply, have small and exquisite structures and low energy consumption, can realize the switching of multiple application scenes, and are more friendly to application environments. The double-cone structure heat sink and the high-temperature lead seat heat sink are at least required to be arranged between the high-temperature superconducting coil and the room temperature and used for intercepting heat flow from the room temperature to the high-temperature superconducting coil, and a single Stirling refrigerator cannot simultaneously cool the double-cone structure heat sink, the high-temperature lead seat heat sink and the high-temperature superconducting coil, so that at least two Stirling refrigerators are required.
(3) The double tapered support structure may significantly increase the stiffness of the system suspension structure and may resist higher levels of transport impact.
Drawings
Fig. 1 is a schematic diagram of a portable conduction cooled high temperature superconducting magnet.
Wherein: the device comprises a main coil 1, an adjusting coil 2, a partition plate 3, a fan 4, a first Stirling refrigerator 5, a radiating fin 6, a cold finger 7, a double-cone supporting structure 8, a vacuum container end plate 9, a coil framework 10, a second cold guide link 11, a heat sink plate 12, a third cold guide link 14, a high-temperature lead seat 15, a high-temperature superconducting switch 16, a second Stirling refrigerator 17, a room-temperature hole tube 18 and a first cold guide link 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention without creative efforts.
As shown in fig. 1, the high-temperature superconducting magnet is a portable conduction-cooled high-temperature superconducting magnet, and the high-temperature superconducting magnet is horizontally arranged, and includes a main coil 1, an adjusting coil 2, a first stirling cryocooler, a second stirling cryocooler, a first cold conduction link, a second cold conduction link, a third cold conduction link, an 80K heat sink plate, a double-cone support structure, a vacuum container and a room-temperature bore tube. The main coil is used for generating a main magnetic field, and the adjusting coil is used for adjusting the configuration of the magnetic field. The main coil 1 and the adjusting coil 2 are both formed by winding in a double-cake mode, and the cakes are separated by a partition plate 3 sprayed with insulating paint and play a role in cold conduction. The Stirling refrigerator comprises two Stirling refrigerators, and the two Stirling refrigerators are all cooled by a fan 4. The cold fingers 7 of the first Stirling refrigerator 5 and the second Stirling refrigerator 17 extend into the vacuum cavities of the vacuum containers at the lower parts of the first Stirling refrigerator and the second Stirling refrigerator and are respectively connected with a first cold guide link 19. The supporting structure of the high-temperature superconducting magnet is a biconical supporting structure 8 which is made of a biconical composite material with low thermal conductivity and high strength. One end of the double-cone supporting structure 8 is connected with the coil framework 10, and the other end is fixed on the end plate 9 of the vacuum container. And applying a certain amount of axial pretightening force in the mounting process to counteract low-temperature shrinkage. The double-cone supporting structure 8 can reduce heat leakage of the system, can also obviously improve the structural rigidity of a suspension system of the high-temperature superconducting magnet, and is used for resisting impact load under working conditions such as transportation and the like. The cold energy of the first Stirling refrigerator 5 is transmitted to the third cold guiding link 14 through the first cold guiding link 19, and then is directly transmitted to the partition plate 3 to be used for guiding cold to the coil of the high-temperature superconducting magnet. Preferably, the number of the third cold guiding links 14 is 4. The cold energy of the second Stirling refrigerator 17 is transmitted to the 80K heat sink plate 12 through the first cold conduction link 19, and the 80K heat sink plate 12 is provided with the high-temperature lead seat 15 and the high-temperature superconducting switch 16, so that the closed-loop operation of the high-temperature superconducting magnet can be realized. The lower end of the 80K heat sink plate 12 is connected with a second cold conducting link 11 which is connected with the double-cone supporting structure 8 and used for forming a heat partition in the middle of the double-cone structure and blocking the room temperature heat from flowing to a coil of the high-temperature superconducting magnet. Preferably, the number of the second cold guiding links 11 is 2, the number of the double-cone supporting structures 8 is also 2, and each second cold guiding link 11 is respectively connected with the double-cone supporting structures 8 in the vacuum chamber. The connection interfaces of the second cold guiding link 11 and the third cold guiding link 14 with the biconical supporting structure 8 and the partition boards 3 and 80K heat sink plates 12 must ensure better insulation strength and lower contact thermal resistance. The room temperature orifice tube 18 is oriented horizontally. The room temperature hole tube is fixed on the vacuum container end plate 9 and is coaxially arranged with the coil of the high temperature superconducting magnet, is used for providing a room temperature environment for a magnetic field required by a user, and is the most important external interface of the superconducting magnet.
Furthermore, the high-temperature superconducting switch 16 is formed by winding a high-temperature superconducting strip and a heating band in a non-inductive mode, the high-temperature superconducting switch 16 is connected in parallel with a coil loop of the high-temperature superconducting magnet, and the high-temperature superconducting switch works in an 80K temperature zone, so that the influence of the heat productivity of the heating band on the heat balance of the coil of the high-temperature superconducting magnet when the switch is turned on can be avoided.
Further, a heat sink is arranged in the middle of the double-cone supporting structure 8 and is used for being connected with the second cold guide link 11.
Furthermore, the 80K heat sink plate is positioned below the cold finger of the second Stirling refrigerator, the specified 80K does not specify that the temperature of the heat sink plate is 80K, but comprehensively considers that the Stirling refrigerator has higher cold output in an 80K temperature area, and the heat sink temperature in the middle of the double-cone support structure is about 80K, so that the heat flow from the room temperature to the high-temperature superconducting coil can be better cut off. The 80K heat sink plate temperature will float within a certain range above and below 80K.
Further, the partition board 3 is made of a high-purity aluminum plate sprayed with insulating paint.
The Stirling refrigerator is provided with a heat radiation fin 6 and a fan 4, the refrigerator generates extremely low temperature heat flow at a cold finger end by the principle of helium adiabatic expansion, and simultaneously heat generated in the helium adiabatic expansion process is dissipated in a heat convection mode through the heat radiation fin and the fan. The heat flow is transferred to the high-temperature superconducting coil, the high-temperature superconducting switch with the double-cone structure heat sink and the high-temperature lead heat sink in a heat conduction mode through the cold conduction link, so that cooling is realized.
The invention adopts two Stirling refrigerators 5 and 17 as cold sources without a cold shield structure, the Stirling refrigerator 5 is used for cooling a current lead and a double-cone supporting structure 8 with a middle heat sink as a supporting structure, and the Stirling refrigerator 17 is used for cooling a coil of a high-temperature superconducting magnet. The high-temperature superconducting magnet works in a 40-50K temperature region, a typical light-weight Stirling refrigerator has 2W cold output in the 40K temperature region and has near 20W cold output in the 80K temperature region, and the requirement of the high-temperature superconducting magnet on the cold of a low-temperature system can be met.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A portable conduction-cooled high temperature superconducting magnet, characterized by: the device comprises a main coil, an adjusting coil, a first Stirling refrigerator, a second Stirling refrigerator, a first cold guide link, a second cold guide link, a third cold guide link, an 80K heat sinking plate, a double-cone supporting structure, a vacuum container and a room temperature hole pipe; the room temperature hole pipe is fixed on the vacuum container end plate and is coaxially arranged with a coil of the high-temperature superconducting magnet; one end of the double-cone supporting structure is connected with a coil framework of the high-temperature superconducting magnet, and the other end of the double-cone supporting structure is fixed on an end plate of the vacuum container; the main coil and the adjusting coil are separated by a partition plate; cold fingers of the first Stirling refrigerator and the second Stirling refrigerator extend into the vacuum container at the lower part of the first Stirling refrigerator and are respectively connected with the first cold guide link; the first Stirling refrigerator is connected with one end of a third cold guide link through a first cold guide link, and the other end of the third cold guide link is connected with the partition plate; the second Stirling refrigerator is connected with a second cold guide link through the first cold guide link and the 80K heat sink plate in sequence, and the second cold guide link is connected with a double-cone supporting structure in the vacuum container.
2. A portable conduction cooled high temperature superconducting magnet according to claim 1, wherein: the main coil and the adjusting coil are wound in a double-cake mode, the partition is sprayed with insulating paint and made of high-purity aluminum plates, and the cold conducting effect is achieved.
3. A portable conduction cooled high temperature superconducting magnet according to claim 1 or 2, wherein: and the first Stirling refrigerating machine and the second Stirling refrigerating agent are both cooled by fans.
4. A portable conduction cooled high temperature superconducting magnet according to claim 1, wherein: the biconical supporting structure is made of a biconical low-thermal-conductivity high-strength composite material.
5. A portable conduction cooled high temperature superconducting magnet according to claim 1, wherein: the first, second and third cold-conducting links are all made of high-purity copper stranded wires, and the connecting interfaces of the cold-conducting links, the double-cone supporting structure, the partition plate and the 80K heat sink plate have high insulating strength and low contact thermal resistance.
6. A portable conduction cooled high temperature superconducting magnet according to any one of claims 1, 2, 4 and 5, wherein: and the middle part of the double-cone supporting structure is provided with a heat sink which is used for being connected with the second cold guide link.
7. A portable conduction cooled high temperature superconducting magnet according to any one of claims 1, 2, 4 and 5, wherein: and the 80K heat sink plate is provided with a high-temperature lead seat and a high-temperature superconducting switch so as to realize the closed-loop operation of the high-temperature superconducting magnet.
8. A portable conduction cooled high temperature superconducting magnet according to any one of claims 1, 2, 4 and 5, wherein: the number of the first cold guide links is 2, the number of the second cold guide links is 2, and the number of the third cold guide links is 4.
9. A portable conduction cooled high temperature superconducting magnet according to claim 7, wherein: the high-temperature superconducting switch is formed by winding a high-temperature superconducting strip and a heating belt in a non-inductive mode and is connected with a coil loop of the high-temperature superconducting magnet in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111620667.8A CN114284027B (en) | 2021-12-27 | 2021-12-27 | Portable conduction cooling high-temperature superconducting magnet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111620667.8A CN114284027B (en) | 2021-12-27 | 2021-12-27 | Portable conduction cooling high-temperature superconducting magnet |
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| CN114284027A true CN114284027A (en) | 2022-04-05 |
| CN114284027B CN114284027B (en) | 2024-02-02 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07201556A (en) * | 1994-01-11 | 1995-08-04 | Hitachi Ltd | Superconductive magnet device, its cryogenic tank support device, and its manufacture |
| JP2000312036A (en) * | 1999-04-26 | 2000-11-07 | Sumitomo Heavy Ind Ltd | Support structure for heavy structure arranged in low- temperature vessel |
| CN102100556A (en) * | 2009-12-22 | 2011-06-22 | 通用电气公司 | Apparatus and method to improve magnet stability in an mri system |
| JP2011228465A (en) * | 2010-04-20 | 2011-11-10 | Japan Superconductor Technology Inc | Superconducting magnet device |
| CN202993652U (en) * | 2012-09-29 | 2013-06-12 | 中国东方电气集团有限公司 | Refrigerating system of superconducting motor based on conduction cooling |
| WO2013102509A1 (en) * | 2012-01-05 | 2013-07-11 | Siemens Plc | Structurally self-supporting superconducting magnet |
| US20150270045A1 (en) * | 2014-03-18 | 2015-09-24 | Hitachi, Ltd. | Superconducting magnet device |
| CN113450996A (en) * | 2021-07-14 | 2021-09-28 | 中国科学院电工研究所 | Two-stage G-M refrigerator cold conduction structure for conducting and cooling superconducting magnet |
-
2021
- 2021-12-27 CN CN202111620667.8A patent/CN114284027B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07201556A (en) * | 1994-01-11 | 1995-08-04 | Hitachi Ltd | Superconductive magnet device, its cryogenic tank support device, and its manufacture |
| JP2000312036A (en) * | 1999-04-26 | 2000-11-07 | Sumitomo Heavy Ind Ltd | Support structure for heavy structure arranged in low- temperature vessel |
| CN102100556A (en) * | 2009-12-22 | 2011-06-22 | 通用电气公司 | Apparatus and method to improve magnet stability in an mri system |
| JP2011228465A (en) * | 2010-04-20 | 2011-11-10 | Japan Superconductor Technology Inc | Superconducting magnet device |
| WO2013102509A1 (en) * | 2012-01-05 | 2013-07-11 | Siemens Plc | Structurally self-supporting superconducting magnet |
| CN202993652U (en) * | 2012-09-29 | 2013-06-12 | 中国东方电气集团有限公司 | Refrigerating system of superconducting motor based on conduction cooling |
| US20150270045A1 (en) * | 2014-03-18 | 2015-09-24 | Hitachi, Ltd. | Superconducting magnet device |
| CN113450996A (en) * | 2021-07-14 | 2021-09-28 | 中国科学院电工研究所 | Two-stage G-M refrigerator cold conduction structure for conducting and cooling superconducting magnet |
Non-Patent Citations (2)
| Title |
|---|
| EHATA K，ET AL: "Development of a miniaturized cooling system for HTS antennas", 《ADVANCES IN SUPERCONDUCTIVITY XII》, pages 1066 - 1068 * |
| 毕延芳等: "高温超导电力应用的低温冷却系统及制冷机", 《中国科学：技术科学》, vol. 43, no. 10, pages 1101 - 1111 * |
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| CN114284027B (en) | 2024-02-02 |
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