CN117711695B - A large high-temperature superconducting current lead double-channel heat exchanger with a connecting section - Google Patents
A large high-temperature superconducting current lead double-channel heat exchanger with a connecting section Download PDFInfo
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- CN117711695B CN117711695B CN202311728517.8A CN202311728517A CN117711695B CN 117711695 B CN117711695 B CN 117711695B CN 202311728517 A CN202311728517 A CN 202311728517A CN 117711695 B CN117711695 B CN 117711695B
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- 238000001816 cooling Methods 0.000 claims abstract description 49
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052802 copper Inorganic materials 0.000 claims abstract description 41
- 239000010949 copper Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 39
- 230000007704 transition Effects 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- 229910052786 argon Inorganic materials 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims 7
- 230000004927 fusion Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000002826 coolant Substances 0.000 description 15
- 239000001307 helium Substances 0.000 description 5
- 229910052734 helium Inorganic materials 0.000 description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 2
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 241000271510 Agkistrodon contortrix Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
- F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
- F28F9/268—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/16—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
本发明公开了一种具有连接段的大型高温超导电流引线双流道换热器，涉及热核聚变及大型超导磁体领域，包括超导段套筒，超导材料，磁屏蔽材料，过渡环，冷却管，入口冷却流道，换热片，换热器，换热器套筒，真空通道，测量通道，双冷却流道和冷却流道出口等。其中，超导段套筒和过渡环焊接在一起，磁屏蔽材料固定在超导段套筒上，起到保护和屏蔽的作用。换热器从换热片段至超导材料段为一体无氧铜制造，其内部含有真空通道和测量通道等，该结构具有较低的接头电阻。换热片通过特定的切口方法组成双流道结构，显著降低换热器的压降。本发明的载流更强，接头电阻更低，压降更低，制冷消耗更少，结构更加强壮，制造费用更低。
The present invention discloses a large-scale high-temperature superconducting current lead double-channel heat exchanger with a connecting section, which relates to the field of thermonuclear fusion and large superconducting magnets, including a superconducting section sleeve, a superconducting material, a magnetic shielding material, a transition ring, a cooling pipe, an inlet cooling channel, a heat exchanger, a heat exchanger sleeve, a vacuum channel, a measuring channel, a double cooling channel and a cooling channel outlet, etc. Among them, the superconducting section sleeve and the transition ring are welded together, and the magnetic shielding material is fixed on the superconducting section sleeve to play a protective and shielding role. The heat exchanger is made of an integral oxygen-free copper from the heat exchange section to the superconducting material section, and contains a vacuum channel and a measuring channel, etc., and the structure has a lower joint resistance. The heat exchanger is formed into a double-channel structure by a specific incision method, which significantly reduces the pressure drop of the heat exchanger. The present invention has a stronger current carrying capacity, lower joint resistance, lower pressure drop, less refrigeration consumption, a stronger structure, and lower manufacturing costs.
Description
技术领域Technical Field
本发明属于热核聚变及大型超导磁体领域，具体涉及一种具有连接段的大型高温超导电流引线双流道换热器。The invention belongs to the field of thermonuclear fusion and large superconducting magnets, and in particular relates to a large high-temperature superconducting current lead double-flow channel heat exchanger with a connecting section.
背景技术Background technique
热核聚变将为人类提供取之不尽的清洁能源，国际热核聚变试验堆(ITER)计划将在未来十年内建成。聚变试验堆大型低温超导磁体工作点温度一般在液氦温度附近，为了向磁体传输电流，需要一段连接室温终端到低温磁体系统的组件，即所谓的电流引线。电流引线按结构组成分为常规电流引线(或称一元电流引线或阻性电流引线)和高温超导电流引线(或称二元电流引线或复合式电流引线)两种类型。高温超导电流引线一般包含四大部分：1)换热器段，类似常规电流引线，设计温区一般在液氮温度附近；2)高温超导段，常工作在液氮温度以下；3)室温端，工作在室温300K附近；4)低温超导段，常工作在液氦温度附近。Thermonuclear fusion will provide mankind with an inexhaustible supply of clean energy. The International Thermonuclear Experimental Reactor (ITER) is scheduled to be built within the next decade. The operating point temperature of the large low-temperature superconducting magnets in the fusion test reactor is generally near the temperature of liquid helium. In order to transmit current to the magnet, a component connecting the room temperature terminal to the low-temperature magnet system is required, which is the so-called current lead. According to the structural composition, the current lead is divided into two types: conventional current lead (also called single-element current lead or resistive current lead) and high-temperature superconducting current lead (also called binary current lead or composite current lead). High-temperature superconducting current leads generally include four parts: 1) heat exchanger section, similar to conventional current lead, the design temperature range is generally near the liquid nitrogen temperature; 2) high-temperature superconducting section, which often works below the liquid nitrogen temperature; 3) room temperature end, which works near room temperature 300K; 4) low-temperature superconducting section, which often works near the liquid helium temperature.
高温超导电流引线为大型低温超导磁体供电，同时连接室温(300K)与低温(4.5K)，换热器段连接高温超导端及室温铜头端，换热器段直接与进口50K的氦气进行换热冷却，与铜导体换热后于室温终端出口温度约300K，通过流量计后最终流回到低温系统。换热器段运行温度为65K-300K。电流引线的设计参数对于50K氦气的流量与压差有明确的限定要求，因此需要设计湿周界大的高效换热器，同时需要控制氦气压差在要求的范围之内。与换热器相关的另一个指标是失冷运行时间，要求在全电流、失冷情况下，整个失冷运行时间内电流引线高温超导材料不会失超。换热器连接段结构非常复杂，需要充分考虑接头电阻、测量通道、真空通道布置、流道合理设计、超导材料及套筒安装等。综合上述各种因素，使其设计困难较大。The high-temperature superconducting current lead supplies power to the large low-temperature superconducting magnet, and connects the room temperature (300K) and the low temperature (4.5K) at the same time. The heat exchanger section connects the high-temperature superconducting end and the room-temperature copper head end. The heat exchanger section directly exchanges heat with the imported 50K helium for cooling. After heat exchange with the copper conductor, the outlet temperature at the room temperature terminal is about 300K, and finally flows back to the low-temperature system after passing through the flowmeter. The operating temperature of the heat exchanger section is 65K-300K. The design parameters of the current lead have clear requirements for the flow rate and pressure difference of 50K helium. Therefore, it is necessary to design an efficient heat exchanger with a large wet perimeter, and at the same time, it is necessary to control the helium pressure difference within the required range. Another indicator related to the heat exchanger is the decooling operation time, which requires that the high-temperature superconducting material of the current lead will not quench during the entire decooling operation time under full current and decooling conditions. The structure of the heat exchanger connection section is very complex, and it is necessary to fully consider the joint resistance, measurement channel, vacuum channel layout, reasonable flow channel design, superconducting material and sleeve installation. Combining the above factors, it is difficult to design it.
发明内容Summary of the invention
为解决上述技术问题，本发明提供一种具有连接段的大型高温超导电流引线双流道换热器，换热片的切口通过特定的方法进行切割，使得冷却管、过渡环、换热器铜棒、换热片、换热器套筒可以组成双流道结构，冷却液流经双流道，在冷却面积不变的情况下，可缩短流道长度等，显著降低换热器整体压差。换热器铜过渡段、换热器铜棒和换热片为一根无氧铜棒整体制造而成，可降低连接段的电阻值，降低制冷损耗。换热器铜过渡段结构设计紧凑，便于安装，其内部集成真空通道和测量通道等。超导段套筒上安装有磁屏蔽材料，起到保护超导材料以及屏蔽外部磁场的作用。换热片表面采用镀银工艺处理，可增强换热器的换热性能，同时可防止被氧化。In order to solve the above technical problems, the present invention provides a large-scale high-temperature superconducting current lead double-channel heat exchanger with a connecting section. The incision of the heat exchanger plate is cut by a specific method, so that the cooling tube, transition ring, heat exchanger copper rod, heat exchanger plate, and heat exchanger sleeve can form a double-channel structure. The coolant flows through the double channel. Under the condition of unchanged cooling area, the channel length can be shortened, etc., and the overall pressure difference of the heat exchanger can be significantly reduced. The heat exchanger copper transition section, heat exchanger copper rod and heat exchanger plate are integrally manufactured from an oxygen-free copper rod, which can reduce the resistance value of the connecting section and reduce the refrigeration loss. The heat exchanger copper transition section has a compact structure design and is easy to install. It integrates a vacuum channel and a measurement channel. Magnetic shielding material is installed on the superconducting section sleeve to protect the superconducting material and shield the external magnetic field. The surface of the heat exchanger plate is treated with a silver plating process, which can enhance the heat exchange performance of the heat exchanger and prevent oxidation.
为达到上述目的，本发明采用的技术方案如下：To achieve the above object, the technical solution adopted by the present invention is as follows:
一种具有连接段的大型高温超导电流引线双流道换热器，包括超导段套筒、超导材料、磁屏蔽材料、过渡环、冷却管、入口冷却流道、换热片、换热器铜棒、换热器套筒、换热器铜过渡段、真空通道、测量通道、双冷却流道和冷却流道出口；所述超导段套筒、超导材料、磁屏蔽材料、过渡环、换热器铜过渡段、真空通道和测量通道构成连接段；超导段套筒和磁屏蔽材料采用氩弧焊点焊在一起，超导段套筒和过渡环采用氩弧焊焊接在一起；超导材料和换热器铜过渡段通过锡焊的焊接方法连接在一起，换热器铜过渡段的内部设置真空通道和测量通道；过渡环真空钎焊在换热器铜过渡段上，冷却管采用氩弧焊焊接在过渡环上，换热器铜棒上设有换热片，换热片的形状为翅片状，换热片的切口通过特定的切口方法进行切割，换热片的外侧安装有换热器套筒，入口冷却流道位于冷却管的位置处，形成冷却液流通管道的入口，冷却液继续在冷却液流通管道中流通，冷却液流通管道在换热片的位置处形成双冷却流道，最后冷却液流通管道中的冷却液在冷却流道出口流出。A large-scale high-temperature superconducting current lead double-flow channel heat exchanger with a connecting section, comprising a superconducting section sleeve, a superconducting material, a magnetic shielding material, a transition ring, a cooling pipe, an inlet cooling flow channel, a heat exchanger plate, a heat exchanger copper rod, a heat exchanger sleeve, a heat exchanger copper transition section, a vacuum channel, a measuring channel, a double cooling flow channel and a cooling flow channel outlet; the superconducting section sleeve, the superconducting material, the magnetic shielding material, the transition ring, the heat exchanger copper transition section, the vacuum channel and the measuring channel constitute the connecting section; the superconducting section sleeve and the magnetic shielding material are spot welded together by argon arc welding, and the superconducting section sleeve and the transition ring are welded together by argon arc welding; the superconducting material and the heat exchanger copper transition section are welded by tin soldering The method is connected together, a vacuum channel and a measuring channel are arranged inside the copper transition section of the heat exchanger; the transition ring is vacuum brazed on the copper transition section of the heat exchanger, the cooling pipe is welded to the transition ring by argon arc welding, a heat exchanger sheet is arranged on the copper rod of the heat exchanger, the shape of the heat exchanger sheet is fin-shaped, the incision of the heat exchanger sheet is cut by a specific incision method, a heat exchanger sleeve is installed on the outer side of the heat exchanger sheet, the inlet cooling channel is located at the position of the cooling pipe, forming the inlet of the coolant circulation pipeline, the coolant continues to circulate in the coolant circulation pipeline, the coolant circulation pipeline forms a double cooling channel at the position of the heat exchange sheet, and finally the coolant in the coolant circulation pipeline flows out at the outlet of the cooling channel.
进一步地，所述换热片的表面镀银，增强换热器的换热性能，同时防止被氧化。Furthermore, the surface of the heat exchange fins is silver-plated to enhance the heat exchange performance of the heat exchanger and prevent oxidation.
进一步地，所述超导段套筒上安装有磁屏蔽材料，超导段套筒和磁屏蔽材料起到保护超导材料以及屏蔽外部磁场的作用。Furthermore, a magnetic shielding material is installed on the superconducting section sleeve, and the superconducting section sleeve and the magnetic shielding material play a role in protecting the superconducting material and shielding the external magnetic field.
进一步地，所述换热片包括168片，从靠近冷却管的一端开始，第1换热片、第2换热片下侧设有切口，第2换热片、第3换热片和第4换热片上侧设有切口，第4换热片、第5换热片和第6换热片下侧设有切口，第6换热片、第7换热片和第8换热片上侧设有切口，第8换热片下侧设有切口，以8片为一组规律类推，从而组成双冷却流道的结构，冷却液流经双冷却流道，在冷却面积不变的情况下，缩短流道长度，降低换热器整体压降。Furthermore, the heat exchanger fins include 168 fins. Starting from one end close to the cooling pipe, the first and second heat exchanger fins are provided with cutouts on the lower sides, the second, third and fourth heat exchanger fins are provided with cutouts on the upper sides, the fourth, fifth and sixth heat exchanger fins are provided with cutouts on the lower sides, the sixth, seventh and eighth heat exchanger fins are provided with cutouts on the upper sides, and the eighth heat exchanger fin is provided with a cutout on the lower side. The same rule is applied to a group of 8 fins, thereby forming a double cooling channel structure. The coolant flows through the double cooling channels, shortening the channel length while keeping the cooling area unchanged, thereby reducing the overall pressure drop of the heat exchanger.
进一步地，所述换热片、换热器铜棒和换热器铜过渡段采用一根无氧铜棒制造，无氧铜棒的内部含有真空通道和测量通道。Furthermore, the heat exchanger fins, the heat exchanger copper rod and the heat exchanger copper transition section are made of an oxygen-free copper rod, and the interior of the oxygen-free copper rod contains a vacuum channel and a measurement channel.
有益效果：Beneficial effects:
本发明与传统单流道换热器相比，双流道换热器的优点是：在换热面积一定的情况下，换热器的流道长度更短，流道的截面积更大，流道压差更低，对低温制冷机的要求更低，能耗更小，具有较高的经济效益；所述的换热器及其连接段采用表面镀银处理，既可以增强换热器换热性能，同时可防止换热器被氧化而降低换热器性能，具有较高的经济效益。所述的换热器及其连接段为一体结构制造，与复杂焊接的连接段，其接头电阻更低，制冷消耗更少，结构更加强壮和制造费用更低等。所述的换热器及其连接段结构紧凑，含有磁屏蔽结构、真空通道和测量通等，超导材料性能更优，整体制造费用更低等。Compared with the traditional single-channel heat exchanger, the advantages of the double-channel heat exchanger of the present invention are: under the condition of a certain heat exchange area, the flow channel length of the heat exchanger is shorter, the cross-sectional area of the flow channel is larger, the flow channel pressure difference is lower, the requirements for the low-temperature refrigerator are lower, the energy consumption is smaller, and it has higher economic benefits; the heat exchanger and its connecting section are treated with surface silver plating, which can not only enhance the heat exchange performance of the heat exchanger, but also prevent the heat exchanger from being oxidized and reducing the performance of the heat exchanger, and have higher economic benefits. The heat exchanger and its connecting section are manufactured as an integrated structure, and compared with the complex welded connecting section, the joint resistance is lower, the refrigeration consumption is less, the structure is stronger, and the manufacturing cost is lower. The heat exchanger and its connecting section have a compact structure, contain a magnetic shielding structure, a vacuum channel and a measuring channel, etc., the superconducting material has better performance, and the overall manufacturing cost is lower.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明的一种具有连接段的大型高温超导电流引线双流道换热器的剖面图。FIG1 is a cross-sectional view of a large high-temperature superconducting current lead double-flow channel heat exchanger with a connecting section according to the present invention.
其中：1－超导段套筒，2－超导材料，3－磁屏蔽材料，4－过渡环，5－冷却管，6－入口冷却流道，7－换热片，8－换热器铜棒，9－换热器套筒，10－换热器铜过渡段，11－真空通道，12－测量通道，13－双冷却流道，14－冷却流道出口。Among them: 1-superconducting section sleeve, 2-superconducting material, 3-magnetic shielding material, 4-transition ring, 5-cooling pipe, 6-inlet cooling channel, 7-heat exchange plate, 8-heat exchanger copper rod, 9-heat exchanger sleeve, 10-heat exchanger copper transition section, 11-vacuum channel, 12-measurement channel, 13-double cooling channel, 14-cooling channel outlet.
具体实施方式Detailed ways
如图1所示，本发明的一种具有连接段的大型高温超导电流引线双流道换热器，包括超导段套筒1、超导材料2、磁屏蔽材料3、过渡环4、冷却管5、入口冷却流道6、换热片7、换热器铜棒8、换热器套筒9、换热器铜过渡段10、真空通道11、测量通道12、双冷却流道13和冷却流道出口14。所述连接段包括超导段套筒1、超导材料2、磁屏蔽材料3、过渡环4、换热器铜过渡段10、真空通道11和测量通道12。超导段套筒1和磁屏蔽材料3采用氩弧焊点焊在一起，然后超导段套筒1和过渡环4采用氩弧焊焊接在一起；超导材料2和换热器铜过渡段10通过锡焊的焊接方法连接在一起，换热器铜过渡段10内部含有真空通道11和测量通道12；过渡环4真空钎焊在换热器铜过渡段10上，冷却管5采用氩弧焊焊接在过渡环4上，换热器铜棒8上含有换热片7，换热片7的形状为翅片状，换热片7的切口通过特定的切口方法进行切割，换热片7的外侧安装有换热器套筒9，入口冷却流道6位于冷却管5的位置处，形成冷却液流通管道的入口，冷却液继续在冷却液流通管道中流通，冷却液流通管道在换热片7的位置处形成双冷却流道13，最后冷却液流通管道的冷却液在冷却流道出口14的位置处流出；换热片7、换热器铜棒8和换热器铜过渡段10采用一根无氧铜棒制造。As shown in FIG1 , a large-scale high-temperature superconducting current lead double-channel heat exchanger with a connecting section of the present invention comprises a superconducting section sleeve 1, a superconducting material 2, a magnetic shielding material 3, a transition ring 4, a cooling pipe 5, an inlet cooling channel 6, a heat exchanger fin 7, a heat exchanger copper rod 8, a heat exchanger sleeve 9, a heat exchanger copper transition section 10, a vacuum channel 11, a measuring channel 12, a double cooling channel 13 and a cooling channel outlet 14. The connecting section comprises a superconducting section sleeve 1, a superconducting material 2, a magnetic shielding material 3, a transition ring 4, a heat exchanger copper transition section 10, a vacuum channel 11 and a measuring channel 12. The superconducting section sleeve 1 and the magnetic shielding material 3 are spot welded together by argon arc welding, and then the superconducting section sleeve 1 and the transition ring 4 are welded together by argon arc welding; the superconducting material 2 and the heat exchanger copper transition section 10 are connected together by soldering, and the heat exchanger copper transition section 10 contains a vacuum channel 11 and a measuring channel 12; the transition ring 4 is vacuum brazed on the heat exchanger copper transition section 10, and the cooling tube 5 is welded on the transition ring 4 by argon arc welding. The heat exchanger copper rod 8 contains a heat exchange plate 7, and the shape of the heat exchange plate 7 is fin-shaped. The cut of the sheet 7 is cut by a specific cutting method. A heat exchanger sleeve 9 is installed on the outside of the heat exchange sheet 7. The inlet cooling channel 6 is located at the position of the cooling pipe 5 to form the inlet of the coolant circulation pipeline. The coolant continues to flow in the coolant circulation pipeline. The coolant circulation pipeline forms a double cooling channel 13 at the position of the heat exchange sheet 7. Finally, the coolant in the coolant circulation pipeline flows out at the position of the cooling channel outlet 14. The heat exchange sheet 7, the heat exchanger copper rod 8 and the heat exchanger copper transition section 10 are made of an oxygen-free copper rod.
其中，磁屏蔽材料3固定在超导段套筒1内表面上，磁屏蔽材料3的表面含有台阶，超导段套筒1和磁屏蔽材料3起到保护超导材料以及屏蔽外部磁场的作用。换热片7的表面镀银，可增强换热器换热性能，同时可防止被氧化。换热片7包括约168片，从靠近冷却管5的一端开始，第1换热片、第2换热片下侧含有切口，第2换热片、第3换热片和第4换热片上侧含有切口，第4换热片、第5换热片和第6换热片下侧含有切口，第6换热片、第7换热片和第8换热片上侧含有切口，第8换热片下侧含有切口，以8片为一组规律类推，采用该切口方法，可以组成双冷却流道结构，冷却液流经双流道，在冷却面积不变的情况下，可缩短流道长度等，显著降低换热器整体压降。Among them, the magnetic shielding material 3 is fixed on the inner surface of the superconducting section sleeve 1, and the surface of the magnetic shielding material 3 contains steps. The superconducting section sleeve 1 and the magnetic shielding material 3 play the role of protecting the superconducting material and shielding the external magnetic field. The surface of the heat exchanger 7 is silver-plated, which can enhance the heat exchange performance of the heat exchanger and prevent oxidation. The heat exchanger 7 includes about 168 pieces. Starting from the end close to the cooling tube 5, the lower side of the first heat exchanger and the second heat exchanger have cuts, the upper side of the second heat exchanger, the third heat exchanger and the fourth heat exchanger have cuts, the lower side of the fourth heat exchanger, the fifth heat exchanger and the sixth heat exchanger have cuts, the upper side of the sixth heat exchanger, the seventh heat exchanger and the eighth heat exchanger have cuts, and the lower side of the eighth heat exchanger has cuts. The rule of 8 pieces as a group is analogous. By adopting this cutting method, a double cooling channel structure can be formed. The coolant flows through the double channel. Under the condition of unchanged cooling area, the channel length can be shortened, etc., which significantly reduces the overall pressure drop of the heat exchanger.
Claims (5)
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