CN117116552A - Compact high-temperature superconductive tube inner conductor with high stability - Google Patents
Compact high-temperature superconductive tube inner conductor with high stability Download PDFInfo
- Publication number
- CN117116552A CN117116552A CN202310854569.3A CN202310854569A CN117116552A CN 117116552 A CN117116552 A CN 117116552A CN 202310854569 A CN202310854569 A CN 202310854569A CN 117116552 A CN117116552 A CN 117116552A
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- CN
- China
- Prior art keywords
- superconducting
- temperature
- cooling channel
- temperature superconducting
- stability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 48
- 239000002184 metal Substances 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 229910052754 neon Inorganic materials 0.000 claims description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 2
- 230000004927 fusion Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 239000000945 filler Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Classifications
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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
-
- 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
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
- H01B12/08—Stranded or braided wires
-
- 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
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The invention discloses an in-tube cable conductor, which belongs to the technical field of superconducting electrician. The conductor consists of REBCO high-temperature superconducting strands, a cooling channel, a metal sheath and a filling material; wherein REBCO high-temperature superconducting strands are closely arranged, spirally wound around the cooling channel, adjacent superconducting strands are contacted, the outer sides of the superconducting strands are armored by a metal sheath, and gaps between the REBCO high-temperature superconducting strands and the metal sheath and between the REBCO high-temperature superconducting strands and the cooling channel are filled by filling materials. The REBCO superconducting strand is internally provided with the metal framework, so that the heat conduction capability of the conductor when hot spots occur is enhanced, the temperature rise of the conductor when faults occur is reduced, and the distribution can be realized, thereby improving the heat stability of the cable conductor in the pipe. In addition, the spiral winding structure of the superconducting strands can reduce alternating current loss, and further expands the application of the high-temperature superconducting strands in high-energy physical devices such as nuclear fusion large-scale superconducting magnet coils.
Description
Technical Field
The invention belongs to the technical field of superconducting electrics, and particularly relates to a compact high-stability high-temperature superconducting tube inner conductor.
Background
The second generation high temperature superconductive strip has wide prospect in the aspects of high temperature low field power transmission and low temperature high field magnet application due to high critical current density, superior mechanical property and electromagnetic property. In low-field power transmission application, the superconducting conductor needs operation current of thousands of amperes or even up to Mo Anpei, and the cable conductor in the tube has the advantages of large transmission current, wide application range and the like. The invention relates to a compact high-stability high-temperature superconducting tube inner conductor, which has the advantages of high engineering current density, uniform current density, high stability and the like, and is suitable for the application fields of low-temperature large-scale high-field magnets and large-current transmission in liquid nitrogen temperature areas.
Disclosure of Invention
The invention aims to provide a compact high-stability high-temperature superconductive tube inner conductor. The cross section of the cable conductor in the pipe is circular, and consists of REBCO high-temperature superconducting strands 8, a cooling channel 5, a metal sheath 7 and a filler 6; the REBCO high-temperature superconducting strands are spirally arranged, tightly wound around the central cooling channel, and tightly contacted with adjacent superconducting strands. A cylindrical metal sheath 7 is additionally arranged on the periphery of the superconducting strand, and gaps between the high-temperature superconducting strand 8 and the metal sheath 7 and gaps between the high-temperature superconducting strand 8 and the cooling channel 5 are filled with fillers 6. The hollow portion inside the cooling passage 5 is a circulation passage of a cooling medium.
The REBCO high-temperature superconducting strand 8 is circular in cross section and consists of a REBCO superconducting wire core 1, a metal framework 2, a metal filler 3 and a metal sheath 4.
The cross section of the cooling channel 5 is a hollow circular ring, the outer diameter size of the cooling channel is the same as that of the REBCO high-temperature superconducting strand, and the cooling channel 5 can be made of copper, aluminum or stainless steel.
The internal space of the cooling channel 5 is a channel through which a cooling medium flows, and the cooling medium is liquid nitrogen, liquid helium, liquid neon, liquid hydrogen or helium.
The outer surface of the metal sheath 7 is of a circular ring structure and is formed by welding two identical semicircular sheaths, the inner wall of the metal sheath 7 is in contact with the superconducting strand metal sheath 4, and copper, aluminum or stainless steel can be selected as a manufacturing material of the metal sheath 7.
The gap between the REBCO high-temperature superconducting strand 8 and the inner wall of the metal sheath 7 and the gap between the REBCO high-temperature superconducting strand 8 and the cooling channel 5 are filled with a filling material 6, wherein the filling material is aluminum nitride, epoxy resin or copper wires.
The beneficial effects of the invention are as follows: one of the difficulties in the production and application of cable conductors in practical lengths is how to improve the stability of the conductor in the event of hot spots. Because of higher heat conductivity and lower electric resistivity of copper and aluminum, the addition of the metal skeleton inside the superconducting strand can quickly reduce the temperature and can also have a shunt effect when hot spots appear, so that the stability of the cable conductor in the practical length tube is improved, and the stability of the large superconducting magnet coil wound by the cable conductor in the tube is further improved.
Drawings
For a clearer description of an example of the invention or of a technical solution in the prior art, the figures to be used in the example will be briefly described, it being obvious that the figures described below are only some embodiments of the invention, from which other figures can be obtained, without inventive effort, for a person skilled in the art.
FIG. 1 is a schematic diagram of an inner conductor of a compact high-stability superconducting tube according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an inner conductor of a compact high-stability superconducting tube according to an embodiment of the present invention;
FIG. 3 is a schematic view of a structure of a cooling channel wound with 6 superconducting sub-strands according to an embodiment of the present invention;
FIG. 4 is a schematic view of the internal metal former structure of a superconducting strand;
fig. 5 is a cross-sectional view of a single superconducting strand;
Detailed Description
The present invention provides a compact high-stability high-temperature superconducting pipe inner conductor, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and obviously, the described embodiment is only a part of embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a compact high-stability high-temperature superconducting tube inner conductor which has the advantages of good thermal stability and low alternating current loss.
The present invention will be described in further detail with reference to the drawings and the detailed description below, in order to make the above objects, features, and advantages of the present invention more comprehensible.
FIG. 1 is a schematic view of a cable conductor in a tube according to an embodiment of the present invention; fig. 2 is a cross-sectional view of an in-tube cable conductor according to an embodiment of the present invention. As shown in fig. 1-2, a compact high-stability high-temperature superconducting tube inner conductor, comprising: a metallic sheath 7, a filler 6, a cooling channel 5 and a plurality of superconducting strands 8. The cross section of the superconducting strands is circular, the cross section of the cooling channel 5 is a hollow circular ring, the superconducting strands are spirally arranged and tightly wound around the cooling channel, and the superconducting strands are in contact with each other. The gaps between the superconducting strands and the inner wall of the metal sheath 7 and the gaps between the superconducting strands 8 and the outer wall of the stainless steel cooling channel are filled with fillers 6, and the materials for manufacturing the fillers can be aluminum nitride, epoxy resin or copper wires. The metal sheath 7 is circular in cross section, the metal sheath 7 is formed by welding two identical half sheaths, and a welding seam 9 shown in fig. 2 is formed at the welding position. The metal sheath 7 can be made of copper, aluminum or stainless steel. Fig. 3 is a schematic structural view of a cooling channel tightly wound with each superconducting strand according to an embodiment of the present invention, as shown in fig. 3, each superconducting sub-strand is tightly arranged according to the same torque, and is spirally wound outside the central cooling channel, wherein the outer diameter size of each superconducting sub-strand is the same as the outer diameter size of the central cooling channel. The inner space of the cooling channel 5 is a circulation channel of cooling medium, and the cooling channel 5 can be made of copper, aluminum or stainless steel. Fig. 4 is a schematic view of the structure of an inner metal skeleton of a superconducting strand according to an embodiment of the present invention, wherein the metal skeleton may be formed by welding two identical L-shaped metal portions, the weld 11 is shown in fig. 4-1, the metal skeleton 2 may be made of copper, aluminum or an aluminum alloy, and fig. 4-2 is a schematic view of the structure of the inner metal skeleton after twisting the superconducting sub-strands. Fig. 5 is a cross-sectional view of a single superconducting strand 8 according to an embodiment of the present invention, where the cross section of the superconducting strand 8 is circular, and the cross section of the single superconducting strand includes a superconducting wire core 1, a metal skeleton 2, a metal filler 3, and a metal sheath 4, where the cross sections of the four superconducting wire cores are all rectangular and are stacked by superconducting tapes, and the four superconducting wire cores are distributed in a central symmetry manner, where the two-stage superconducting wire cores at the upper left and lower right are vertically arranged, and the two-stage superconducting wire cores at the upper left and upper right are horizontally arranged. The metal sheath 4 is welded from two identical half-sheaths, where a weld 10 is formed as shown in fig. 5. And (3) processing the metal filling 3 into an arc shape, and polishing the periphery of the metal filling 3 to be smooth by using a file. And placing the polished metal filler 3 around the superconducting wire core 1. The superconductive wire core 1 and the metal filling are sleeved into the metal sheath 4, and the metal filling 3 is used for filling and fixing, and the manufacturing material of the metal filling can be copper or aluminum.
According to the invention, the metal skeleton is arranged at the central part of the superconducting strand, so that the heat dissipation effect of the superconducting strand when hot spots occur inside the superconducting strand can be improved, and the current density can be reduced, thereby improving the thermal stability of the cable conductor in the practical length pipe.
The above description of embodiments is only for aiding in the understanding of the method and core idea of the invention; also, it is within the scope of the present invention to vary from one of ordinary skill in the art to another in view of the teachings of the present invention. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. The compact high-stability high-temperature superconducting tube inner conductor is characterized in that the tube inner cable conductor is a high-current-carrying superconducting conductor, the cross section of the tube inner cable conductor is circular, the tube inner cable conductor comprises a plurality of REBCO high-temperature superconducting strands, a cooling channel, a metal sheath and a filling material, wherein each superconducting strand is spirally arranged, tightly wound around the cooling channel, and two adjacent superconducting strands are in contact; the outermost side is armored by a metal sheath; the gaps between the metal sheath and each REBCO high-temperature superconducting strand and the gaps between each REBCO high-temperature superconducting strand and the cooling channel are filled with filling materials, so that a compact high-stability quasi-isotropy high-temperature superconducting pipe inner conductor is formed. The hollow portion of the cooling passage 5 is a circulation passage of a cooling medium.
2. The compact high-temperature and high-stability superconducting tube inner conductor according to claim 1, wherein the cross section of the cooling channel 5 is a hollow circular ring, the outer diameter size of the cooling channel is the same as the outer diameter size of the high-temperature superconducting strand 8, and the cooling channel 5 can be made of copper, aluminum or stainless steel.
3. A compact high stability high temperature superconducting tube inner conductor according to claim 1, wherein the cooling medium is liquid nitrogen, liquid helium, liquid neon, liquid hydrogen or helium.
4. The compact high-stability quasi-isotropic high-temperature superconducting pipe inner conductor according to claim 1, wherein the outer surface of the metal sheath 7 is of a circular ring structure, the size and shape of the middle hollowed-out part are the same as the outer diameter of the superconducting strand after being spirally wound, and the metal sheath 7 can be made of copper, aluminum or stainless steel.
5. The compact high-stability high-temperature superconducting tube inner conductor according to claim 1, wherein the inner metal skeleton of the superconducting strand is formed by welding two L-shaped metal skeletons, and the metal skeleton 2 is made of copper, aluminum or aluminum alloy.
6. The compact high-stability high-temperature superconductive tube inner conductor according to claim 1, being characterized in that the metal filling 3 is made of copper, aluminum or aluminum alloy. The metal sheath 4 is made of copper, aluminum alloy or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310854569.3A CN117116552A (en) | 2023-07-12 | 2023-07-12 | Compact high-temperature superconductive tube inner conductor with high stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310854569.3A CN117116552A (en) | 2023-07-12 | 2023-07-12 | Compact high-temperature superconductive tube inner conductor with high stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117116552A true CN117116552A (en) | 2023-11-24 |
Family
ID=88793645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310854569.3A Pending CN117116552A (en) | 2023-07-12 | 2023-07-12 | Compact high-temperature superconductive tube inner conductor with high stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117116552A (en) |
-
2023
- 2023-07-12 CN CN202310854569.3A patent/CN117116552A/en active Pending
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