CN102930946B - Conduction cooling device for high-temperature superconducting magnet - Google Patents
Conduction cooling device for high-temperature superconducting magnet Download PDFInfo
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- CN102930946B CN102930946B CN201210370506.2A CN201210370506A CN102930946B CN 102930946 B CN102930946 B CN 102930946B CN 201210370506 A CN201210370506 A CN 201210370506A CN 102930946 B CN102930946 B CN 102930946B
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- conduction cooling
- guide apparatus
- superconducting magnet
- cold
- cooling plate
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- 238000001816 cooling Methods 0.000 title claims abstract description 92
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052802 copper Inorganic materials 0.000 claims abstract description 39
- 239000010949 copper Substances 0.000 claims abstract description 39
- 238000005057 refrigeration Methods 0.000 claims abstract description 25
- 230000005855 radiation Effects 0.000 claims description 18
- 239000011241 protective layer Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 229910052738 indium Inorganic materials 0.000 claims description 8
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000005030 aluminium foil Substances 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000003471 anti-radiation Effects 0.000 abstract 2
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009954 braiding Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The invention discloses a conduction cooling device for a high-temperature superconducting magnet. The conduction cooling device is characterized by comprising a columnar conduction cooling plate (1) with a circular cross section, conduction cooling copper straps (2), a cold head connecting flange (4), an anti-radiation layer (5) and an annular bracket (6), wherein at least one conduction cooling copper strap (2) is fixed on each of the two axial ends and the middle part of the conduction cooling plate (1); the other end of each conduction cooling copper strap (2) is fixed on the cold head connecting flange (4); the anti-radiation layer (5) covers the outer surface of the conduction cooling plate (1); and the annular bracket (6) is fixed outside the conduction cooling plate, and is used for shaping the conduction cooling device and simultaneously strengthening the structural strength of the whole conduction cooling device. By the conduction cooling device, a temperature gradient in a conduction-cooled single-solenoid high-temperature superconducting magnet can be reduced, and the refrigeration speed of a conduction cooling structure also can be increased; and moreover, the structure of the conduction cooling plate has a large size high cooling capacity, so that the conduction cooling device also has a heat sink function.
Description
Technical field
The present invention relates to high-temperature superconducting magnet conduction Refrigeration Technique, is that a kind of high-temperature superconducting magnet conducts cooling cold guide apparatus structure specifically.
Background technology
Along with improving constantly and the significantly lifting of G-M refrigeration machine refrigeration work consumption of high temperature superconducting materia performance, current 20 ~ 30K (kelvin degree) has become high-temperature superconductor high field magnet operation warm area the most economic.The high-temperature superconducting magnet of hundreds of kilogram weight to be cooled to this warm area mainly contain two class modes.Mode one is cryogenic gas convection current refrigeration, such as cold helium refrigeration, and helium is by carrying out exchange heat by high-temperature superconducting magnet surface after G-M refrigeration machine refrigeration.The advantage of convection current refrigeration is that refrigerating speed is fast, and magnet temperature gradient is little; Shortcoming is that Dewar structure is complicated, and equipment cost is high.Another kind of mode is conduction refrigeration, its general principle utilizes vacuum technique to eliminate the heat convection between magnet and external environment, heat radiation screening technology is utilized significantly to weaken extraneous thermal radiation, afterwards, by conduction structure, the cold of G-M refrigeration machine is transmitted to high-temperature superconducting magnet surface, realizes the cooling of magnet.The advantage of conduction refrigeration is that energy consumption is low, and equipment is simple, compact conformation, is convenient to safeguard, is applicable to power equipment.Major defect is that steady state temperature gradient is comparatively large, and cooling rate is slower.
In order to reduce the temperature gradient of high-temperature superconducting magnet inside, improving the refrigerating speed of magnet, needing to be optimized design to conduction structure.On the one hand, conduction structure reasonable in design to be carried out according to the profile of superconducting magnet, sufficient conduction cooling passage is set, on the other hand, suitable material will be selected for conduction structure, formulate reliable processing technology.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of reduction and conducts the refrigeration temperature gradient of single solenoid high-temperature superconducting magnet inside, the high-temperature superconducting magnet cold guide apparatus of fast-refrigerating.
Described high-temperature superconducting magnet cold guide apparatus, it is characterized in that: comprise conduction cooling copper strips, column conduction cooling plate that cold head adpting flange, radiation protective layer, ring support, cross section are circular arc, the each fixing at least one conduction cooling copper strips in the axial two ends of described conduction cooling plate and middle part, the other end of described conduction cooling copper strips is fixed on cold head adpting flange, described conduction cooling plate outer surface covers radiation protective layer, described ring support is fixed on the outside of conduction cooling plate, for being cold guide apparatus setting, improve the intensity of whole cold guide apparatus structure simultaneously.
The hoop radian of described conduction cooling plate cross section is 270 ~ 330 °, thickness is 5 ~ 15mm, axial height is suitable with the height of the tubular high-temperature superconducting magnet of helical cooled, and the inner surface of described conduction cooling plate and the outer surface of superconducting magnet keep the spacing of 30 ~ 50mm.
Described conduction cooling copper strips is formed by stacking by forming multi-disc Copper Foil through the high purity copper braid over braid of impregnation process of insulating, to weld, to rivet or bolt connecting mode and other parts are formed syndeton.
Described conduction cooling copper strips, with in riveted joint or bolted structure, need clamp indium sheet at joint face place, to reduce contact heat resistance.
Described conduction cooling copper strips is fixedly welded on the axially middle part outside cold guide apparatus, for connecting cold guide apparatus and cold head adpting flange.
Described conduction cooling copper strips is fixedly welded on the axial end portion of cold guide apparatus, for connecting the cool guiding rod of cold guide apparatus and magnet.
The cold head adpting flange be made up of fine copper, bolt is connected to G-M refrigeration machine cold head, for by the cold of cold head guiding cold guide apparatus, in joint face place clamping indium sheet, to reduce contact heat resistance.
The radiation protective layer made with aluminium foil is with plated film or the bonding surface being covered in circular arc conduction cooling plate.
The ring support made with the insulating material of high mechanical properties under low temperature is made up of at least one annular configuration, is fixed on the outside of circular arc conduction cooling plate.
The described ring support that epoxy glass fiber material or polytetrafluoroethylmaterial material are made has two loop configuration to be fixed on the outside of conduction cooling plate.
The present invention can reduce the temperature gradient of conducting refrigeration single solenoid high-temperature superconducting magnet inside, can also improve the refrigerating speed of conduction refrigeration structure simultaneously.The circular arc structure of conduction cooling plate, the selection of dimension of cold guide apparatus, the braiding structure of conduction cooling copper strips and insulation impregnating process are all conducive to reducing the eddy current loss in the magnet course of work.The connected mode of copper strips and miscellaneous part and the connected mode of cold head adpting flange and cold head contribute to reducing contact heat resistance, improve the conduction cooling efficiency of whole conduction cooling plate structure.The introducing of radiation protective layer contributes to reducing the photothermal intrusion of magnet.The introducing of supporting structure then improves the bulk strength of cold guide apparatus structure, has widened its range of application.In addition, this cold guide apparatus structure not only has function, the protective shield of radiation function of conduction cooling passage, and has larger quality due to conduction cooling plate structure, and can store more cold, therefore it also has heat sink function.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention,
Fig. 2 is superconducting magnet structure schematic diagram,
Fig. 3 is G-M refrigeration machine cold head structural representation,
Fig. 4 is the installation diagram of cold guide apparatus and superconducting magnet, current feed and refrigeration machine cold head.
Wherein: label 1-conduction cooling plate, 2-conduction cooling copper strips, 3-tie point, 4-adpting flange, 5-radiation protective layer, 6-ring support, the two cake of 7-superconduction, 8-cool guiding rod, 9-upper stainless steel adpting flange, 10-lower stainless steel adpting flange, 11-cool guide sheet, 12-current lead of superconducting magnets, 13-G-M refrigeration machine cold head.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described: high-temperature superconducting magnet cold guide apparatus as shown in fig. 1, it comprises: cross section is the column conduction cooling plate 1 of circular arc, conduction cooling copper strips 2, cold head adpting flange 4, radiation protective layer 5, ring support 6, the each fixing at least one conduction cooling copper strips 2 in the axial two ends of described conduction cooling plate 1 and middle part, the other end of described conduction cooling copper strips 2 is fixed on cold head adpting flange 4, described conduction cooling plate 1 outer surface covers radiation protective layer 5, described ring support 6 is fixed on the outside of conduction cooling plate, for being cold guide apparatus setting, improve the intensity of whole cold guide apparatus structure simultaneously.
Circular arc conduction cooling plate adopts highly heat-conductive material, such as metal material or thermal conductive ceramic material (as AlN ceramic), by casting or being formed by sheet material stample fiber, the both sides of conduction cooling coiled sheet Qu Xiangxiang need retain enough spacing of placing high-temperature superconducting magnet current feed 12.
The hoop radian of described conduction cooling plate 1 cross section is 270 ~ 330 °, thickness is 5 ~ 15mm, axial height is suitable with the height of the tubular high-temperature superconducting magnet 14 of helical cooled, and the inner surface of described conduction cooling plate 1 and the outer surface of superconducting magnet 14 keep the spacing of 30 ~ 50mm.
Described conduction cooling copper strips 2 is formed by stacking by forming multi-disc Copper Foil through the high purity copper braid over braid of impregnation process of insulating, to weld, to rivet or bolt connecting mode and other parts are formed syndeton.
Described conduction cooling copper strips 2, with in riveted joint or bolted structure, need clamp indium sheet at joint face place, to reduce contact heat resistance.
Described conduction cooling copper strips is divided into two classes, and a class is welded in the axially middle part outside conduction cooling plate, and for connecting cold guide apparatus and cold head adpting flange 4, the another kind of axial end portion being welded in cold guide apparatus, for connecting the cool guiding rod of cold guide apparatus and magnet.
The cold head adpting flange 4 be made up of fine copper, bolt is connected to G-M refrigeration machine cold head 13, and cold head as shown in Figure 3, for by the cold of cold head guiding cold guide apparatus, clamps indium sheet at joint face place, to reduce contact heat resistance.
Radiation protective layer is made up of radiation proof material, such as aluminium foil, alumetize polyester fibre film, aluminium-foil paper etc.The radiation protective layer 5 made with aluminium foil is with plated film or the bonding surface being covered in circular arc conduction cooling plate 1.Plated film or the mode such as bonding can be adopted to add, for reducing the radiant heat that extraneous radiation brings to cold guide apparatus.
The ring support 6 made with the insulating material of high mechanical properties under low temperature is made up of at least one annular configuration, is fixed on the outside of circular arc conduction cooling plate 1.
The described ring support 6 that such as epoxy glass fiber material or polytetrafluoroethylmaterial material are made has two loop configuration to be fixed on the outside of conduction cooling plate 1.
In the present invention, the circular arc structure of conduction cooling plate, the selection of dimension of cold guide apparatus, the braiding structure of conduction cooling copper strips and insulation impregnating process are all conducive to reducing the eddy current loss in the magnet course of work.The connected mode of copper strips and miscellaneous part and the connected mode of cold head adpting flange and cold head contribute to reducing contact heat resistance, improve the conduction cooling efficiency of whole conduction cooling plate structure.Radiation protective layer must be introduced and contribute to reducing the photothermal intrusion of magnet.The introducing of supporting structure then improves the bulk strength of conduction cooling plate structure, has widened its range of application.In addition, this cold guide apparatus structure not only has function, the protective shield of radiation function of conduction cooling passage, and has larger quality due to cold guide apparatus structure, and can store more cold, therefore it also has heat sink function.
Be that embodiment is introduced the present invention with 100kJ/50kW Conduction cooled SMES (super conductive magnetic storage energy) magnet, superconducting magnet and the conduction cooling of self structure are as shown in Figure 2.The basic structure of Conduction cooled magnet comprises: the two cake 7 of superconduction, high purity copper cool guiding rod 8, upper stainless steel adpting flange 9, lower stainless steel adpting flange 10, high purity copper cool guide sheet 11.The basic parameter of each structure is as shown in table 1.
Table 1 100kJ/50kW SMES magnet major parameter
Figure 3 shows that G-M refrigeration machine cold head structure chart, cold head is cylindrical, and refrigerating section diameter is 100mm, is highly 80mm.
According to the design feature of Conduction cooled magnet and G-M refrigeration machine cold head, the basic parameter of circular arc conduction cooling plate structure is as shown in table 2
The basic parameter of table 2 circular arc conduction cooling plate structure
Figure 4 shows that the installation diagram of conduction cooling plate and superconducting magnet, current feed and refrigeration machine cold head.Wherein adopt between conduction cooling copper strips 2 and conduction cooling plate main body 1 and be welded to connect, middle part copper strips 2 and cold head adpting flange 4 also adopt and are welded to connect, and end copper strips 2 is with bolts with magnet cool guiding rod 8, and joint face place is lined with 0.1mm indium sheet.Space between the curling both sides in opposite directions of conduction cooling plate main body 1 is used for laying superconductive current lead 12.Cold head adpting flange 4 is same with the contact-making surface of G-M refrigeration machine cold head 13 is lined with the thick indium sheet of 0.1mm.
Claims (9)
1. a high-temperature superconducting magnet cold guide apparatus, it is characterized in that: comprise conduction cooling copper strips (2), cold head adpting flange (4), radiation protective layer (5), ring support (6), cross section is the column conduction cooling plate (1) of circular arc, the each fixing at least one conduction cooling copper strips (2) in the axial two ends of described conduction cooling plate (1) and middle part, the other end of described conduction cooling copper strips (2) is fixed on cold head adpting flange (4), described conduction cooling plate (1) outer surface covers radiation protective layer (5), described ring support (6) is fixed on the outside of conduction cooling plate, for being cold guide apparatus setting, improve the intensity of whole cold guide apparatus structure simultaneously,
The hoop radian of described conduction cooling plate (1) cross section is 270 ~ 330 °, thickness is 5 ~ 15mm, axial height is suitable with the height of the tubular high-temperature superconducting magnet of helical (14) cooled, and the inner surface of described conduction cooling plate (1) and the outer surface of superconducting magnet (14) keep the spacing of 30 ~ 50mm.
2. high-temperature superconducting magnet cold guide apparatus according to claim 1, it is characterized in that: described conduction cooling copper strips (2) is formed by stacking by forming multi-disc Copper Foil through the high purity copper braid over braid of impregnation process of insulating, to weld, to rivet or bolt connecting mode and other parts are formed syndeton.
3. high-temperature superconducting magnet cold guide apparatus according to claim 2, is characterized in that: described conduction cooling copper strips (2) is to rivet or in bolted structure, need clamp indium sheet at joint face place, to reduce contact heat resistance.
4. according to the high-temperature superconducting magnet cold guide apparatus one of claim 1,2,3 Suo Shu, it is characterized in that: described conduction cooling copper strips (2) is fixedly welded on the axially middle part outside cold guide apparatus, for connecting cold guide apparatus and cold head adpting flange (4).
5. according to the high-temperature superconducting magnet cold guide apparatus one of claim 1,2,3 Suo Shu, it is characterized in that: described conduction cooling copper strips (2) is fixedly welded on the axial end portion of cold guide apparatus, for connecting the cool guiding rod of cold guide apparatus and magnet.
6. high-temperature superconducting magnet cold guide apparatus according to claim 1, it is characterized in that: the cold head adpting flange (4) be made up of fine copper, bolt is connected to G-M refrigeration machine cold head (13), for cold guide apparatus that the cold of cold head is led, in joint face place clamping indium sheet, to reduce contact heat resistance.
7. high-temperature superconducting magnet cold guide apparatus according to claim 1, is characterized in that: the radiation protective layer (5) made with aluminium foil is with plated film or the bonding surface being covered in circular arc conduction cooling plate (1).
8. high-temperature superconducting magnet cold guide apparatus according to claim 1, it is characterized in that: the ring support (6) made with the insulating material of high mechanical properties under low temperature is made up of at least one annular configuration, is fixed on the outside of circular arc conduction cooling plate (1).
9. high-temperature superconducting magnet cold guide apparatus according to claim 8, is characterized in that: the described ring support (6) that epoxy glass fiber material or polytetrafluoroethylmaterial material are made has two loop configuration to be fixed on the outside of conduction cooling plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210370506.2A CN102930946B (en) | 2012-09-27 | 2012-09-27 | Conduction cooling device for high-temperature superconducting magnet |
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| CN201210370506.2A CN102930946B (en) | 2012-09-27 | 2012-09-27 | Conduction cooling device for high-temperature superconducting magnet |
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| CN102930946B true CN102930946B (en) | 2014-12-24 |
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| CN103779033B (en) * | 2014-02-09 | 2017-02-15 | 奥泰医疗***有限责任公司 | Low-temperature cooling system |
| CN109036758B (en) * | 2018-07-16 | 2020-06-23 | 中国科学院合肥物质科学研究院 | Cold volume transmission structure of high temperature superconducting magnet is placed to level |
| CN109148679A (en) * | 2018-08-23 | 2019-01-04 | 北京无线电计量测试研究所 | A kind of quantum superconduction chip is thermally connected part and production method |
| CN114823039A (en) * | 2022-04-15 | 2022-07-29 | 华北电力大学 | Efficient and flexible superconducting magnet cold conduction method |
| CN115291148B (en) * | 2022-09-29 | 2022-12-20 | 中国科学院合肥物质科学研究院 | Large superconducting magnet low-temperature test supporting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595675A (en) * | 2004-06-23 | 2005-03-16 | 华中科技大学 | A cooling arrangement for high temperature superconducting device |
| CN101413735A (en) * | 2007-10-16 | 2009-04-22 | 西门子磁体技术有限公司 | Cooled cryostat radiation shield |
| CN202871443U (en) * | 2012-09-27 | 2013-04-10 | 华中科技大学 | Cold-conducting device for high temperature superconducting magnet |
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| JP3260497B2 (en) * | 1993-07-27 | 2002-02-25 | 株式会社東芝 | Superconducting magnet for MRI equipment |
| JP4181088B2 (en) * | 2004-06-14 | 2008-11-12 | ジャパンスーパーコンダクタテクノロジー株式会社 | Superconducting coil heat transfer structure and superconducting magnet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595675A (en) * | 2004-06-23 | 2005-03-16 | 华中科技大学 | A cooling arrangement for high temperature superconducting device |
| CN101413735A (en) * | 2007-10-16 | 2009-04-22 | 西门子磁体技术有限公司 | Cooled cryostat radiation shield |
| CN202871443U (en) * | 2012-09-27 | 2013-04-10 | 华中科技大学 | Cold-conducting device for high temperature superconducting magnet |
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| JP平7-45423A 1995.02.14 * |
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