CN217405178U - Double-layer cladding high-temperature superconducting conductor - Google Patents
Double-layer cladding high-temperature superconducting conductor Download PDFInfo
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- CN217405178U CN217405178U CN202220911396.5U CN202220911396U CN217405178U CN 217405178 U CN217405178 U CN 217405178U CN 202220911396 U CN202220911396 U CN 202220911396U CN 217405178 U CN217405178 U CN 217405178U
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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
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- 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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Abstract
The utility model relates to a double-deck involucrum high temperature superconducting conductor, through the inlayer involucrum of piling up out of band cladding alloy material at high temperature superconductor, the inlayer involucrum of high strength has guaranteed that high temperature superconducting conductor has sufficient mechanical strength, can bear the high magnetic field, inside and outside electromagnetic stress under the heavy current, also provide the protection for being in the high temperature superconducting conductor in magnet machine-shaping in-process simultaneously, and the outer involucrum of inner shell outer cladding pure metal material, the outer involucrum of high plasticity has absorbed the necessary plastic deformation of high temperature superconducting conductor when hank big conductor or magnet, in order to avoid causing high temperature superconducting to pile up the area and warp too big and lose superconductivity, can also reduce the space between the high temperature superconducting conductor simultaneously, increase area of contact, be favorable to reducing stress accumulation, improve high temperature superconducting conductor's fatigue resistance, adopt high strength involucrum ability through the inlayer, The outer layer adopts a double-layer structure design of a high-plasticity cladding, so that the high-temperature superconducting conductor has excellent comprehensive mechanical properties.
Description
Technical Field
The utility model belongs to the technical field of superconductive conductor application technique and specifically relates to indicate a double-deck cladding high temperature superconductive conductor.
Background
The REBCO high-temperature superconducting tape has extremely high critical magnetic field and high critical current density, and is one of the preferred materials for manufacturing the steady-state magnet above 20T. The REBCO high-temperature superconducting strip is a multilayer composite material and mainly comprises a base layer, a superconducting layer, a silver protective layer, a copper protective layer and the like, a high-intensity magnetic field magnet is usually huge in size, the number of turns of a magnet coil needs to be reduced and single-turn current needs to be improved in order to reduce the inductance of the magnet, the current carrying capacity of a single high-temperature superconducting strip is limited, and a plurality of high-temperature superconducting strips need to be connected in parallel. When a high-temperature superconducting conductor is wound into a large conductor or a magnet, the conductor can generate necessary deformation under the action of external force, on one hand, the dimensional tolerance of the magnet meets the design index, and on the other hand, the gap between the conductors is reduced to enhance the mechanical stability.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the present invention is to overcome the problem that when the high temperature superconducting conductor in the prior art is plastically deformed, the high temperature superconducting tape inside the single-layer metal cladding is over deformed to cause quench, so that it is necessary to provide a double-layer cladding high temperature superconducting conductor.
In order to solve the technical problem, the utility model provides a double-deck encapsidation high temperature superconducting conductor, include:
a high temperature superconducting stacked tape;
the inner-layer cladding is made of alloy materials and covers the high-temperature superconducting stacking belt;
the outer-layer cladding is made of pure metal and covers the inner-layer cladding.
In an embodiment of the present invention, the superconducting tape further comprises a support layer formed by coating the high temperature superconducting stacked tape with a low temperature solder embedded with a metal wire, wherein the support layer is located in the inner cladding.
In an embodiment of the present invention, the metal wire is made of pure metal, and is made of high-purity copper, aluminum or silver.
In an embodiment of the present invention, the solder material of the low temperature solder contains lead, tin or bismuth.
In one embodiment of the present invention, the melting point of the low temperature solder is less than 250 ℃.
In one embodiment of the present invention, the high temperature superconducting stacked tape is composed of at least two layers of high temperature superconducting tapes.
In one embodiment of the present invention, the high temperature superconducting tapes are stacked layer by layer.
In an embodiment of the present invention, the inner cladding is made of copper alloy or aluminum alloy.
In one embodiment of the present invention, the outer cladding is made of high-purity copper, aluminum or silver.
In one embodiment of the present invention, the high temperature superconducting stacked tape has a rectangular cross-section.
Compared with the prior art, the technical scheme of the utility model have following advantage:
double-deck involucrum high temperature superconducting conductor, through piling up the inlayer involucrum of outband cladding alloy material at high temperature superconductor, the inlayer involucrum of high strength has guaranteed that high temperature superconducting conductor has sufficient mechanical strength, can bear the high magnetic field, inside and outside electromagnetic stress under the heavy current, also provide the protection for being in the high temperature superconducting conductor in magnet machine-shaping in-process simultaneously, and the outer involucrum of inner involucrum pure metal material, the outer involucrum of high plasticity has absorbed high temperature superconducting conductor necessary plastic deformation when hank big conductor or magnet, in order to avoid causing high temperature superconducting to pile up the area and warp too big and lose superconductivity, can also reduce the space between the high temperature superconducting conductor simultaneously, increase area of contact, be favorable to reducing stress accumulation, improve high temperature superconducting conductor's fatigue resistance, adopt high strength involucrum, through the inlayer, The outer layer adopts a double-layer structure design of a high-plasticity cladding, so that the high-temperature superconducting conductor has excellent comprehensive mechanical properties.
Drawings
In order to make the content of the invention more clearly understood, the invention will now be described in further detail with reference to specific embodiments thereof, in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic structural diagram of a double clad high temperature superconducting conductor according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the multi-double clad HTS conductor of FIG. 1 under compression.
The specification reference numbers indicate: 1. a high temperature superconducting stacked tape; 2. an inner cladding; 3. an outer layer cladding; 4. a support layer; 11. a high temperature superconducting tape; 41. a metal wire; 42. and (3) low-temperature welding flux.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not limited to the present invention.
The utility model discloses a preferred embodiment of double-decker cladding high temperature superconducting conductor.
Referring to fig. 1 to 2, a double clad high temperature superconducting conductor includes:
the high-temperature superconducting stacked belt 1 is formed by stacking at least two layers of high-temperature superconducting tapes 11 in a layer-by-layer arrangement mode and then welding the high-temperature superconducting stacked belt 1 into a cuboid shape through low-temperature welding flux 42, so that the cross section of the high-temperature superconducting stacked belt 1 is rectangular.
The inner layer cladding 2 is coated outside the high-temperature superconducting stacking belt 1, the inner layer cladding 2 is made of materials with high electric conductivity, high heat conductivity and high strength at low temperature, the selectable materials are copper alloy, aluminum alloy and the like, the inner layer cladding 2 provides the core strength of the high-temperature superconducting conductor, and the inner layer cladding 2 only deforms slightly when the high-temperature superconducting conductor is subjected to external stress, so that the internal high-temperature superconducting stacking belt 1 is protected from bearing excessive external force or deformation to cause superconducting recession, and meanwhile, the higher electric conductivity and the heat conductivity of the inner layer cladding 2 are also beneficial to rapidly and transversely transferring current and heat when the high-temperature superconducting stacking belt 1 is in a critical state, and the high-temperature superconducting conductor is enabled to keep higher thermal stability. In addition, the high-strength inner cladding 2 ensures that the high-temperature superconducting conductor has enough mechanical strength, can bear internal and external electromagnetic stress under high magnetic field and large current, and simultaneously provides protection for the high-temperature superconducting conductor in the magnet processing and forming process.
The outer layer cladding 3 is coated outside the inner layer cladding 2, the outer layer cladding 3 is made of a material with extremely high electric conductivity, high thermal conductivity, high ductility and low strength at low temperature, and the selected material is high-purity copper, aluminum, silver and the like. When the high-temperature superconducting conductor is wound into a magnet or a multi-stage stranded cable, namely when the high-temperature superconducting conductors of the double-layer cladding are subjected to plastic deformation in a pressed state, the outer-layer cladding 3 can fully absorb the deformation caused by external force, so that the high-temperature superconducting conductor can meet the design requirement for deformation and simultaneously can not cause the inner high-temperature superconducting stacking belt 1 to lose superconductivity due to overlarge stress or strain, the outer-layer cladding 3 can also ensure the uniformity of stress of the inner-layer cladding 2 and the high-temperature superconducting stacking belt 1, the superconductivity decline caused by the high-temperature superconducting stacking belt 1 under the action of thermal stress and electromagnetic stress is reduced, the deformation of the outer-layer cladding 3 also reduces the void ratio of the magnet or the conductor, and the thermal stability and the safety margin of the high-temperature superconducting conductor are improved. Therefore, the high-plasticity outer cladding 3 can absorb the necessary plastic deformation of the high-temperature superconducting conductor when the high-temperature superconducting conductor is twisted into a large conductor or a magnet, so that the superconducting performance loss caused by overlarge deformation of the high-temperature superconducting stacking belt 1 is avoided, and meanwhile, the gaps among the high-temperature superconducting conductors can be reduced, the contact area is increased, the stress accumulation is favorably reduced, and the fatigue resistance of the high-temperature superconducting conductor is improved.
Specifically, the high-temperature superconducting tape comprises a support layer 4, the support layer 4 is formed by coating the high-temperature superconducting stacked tape 1 with low-temperature solder 42 embedded with metal wires 41, the support layer 4 is positioned in the inner-layer cladding 2, the metal wires 41 are made of high-conductivity and high-thermal-conductivity materials, and can be made of high-purity copper, aluminum, silver and the like, the matching use of the metal wires 41 and the low-temperature solder 42 can ensure that stress can be uniformly transmitted to the high-temperature superconducting stacked tape 1 in the processing and forming process of the high-temperature superconducting conductor, so that the high-temperature superconducting stacked tape 1 cannot lose superconductivity due to instant large stress, the support strength of the solder to the high-temperature superconducting tape 11 is further improved by the metal wires 41, compared with the support layer 4 made of pure solder, the support of the high-temperature superconducting stacked tape 1 by the low-temperature solder 42 can be enhanced on the basis that the sectional area of the conductor is not increased by replacing part of the metal wires 41, the internal electromagnetic stress which can be borne by the high-temperature superconducting stacked belt 1 is improved, so that the high-temperature superconducting stacked belt 1 can bear stronger internal electromagnetic stress, and in addition, the heat conductivity and the electric conductivity of the high-purity metal wire 41 at low temperature are far higher than those of alloy solder, so that the heat stability of the high-temperature superconducting conductor is also improved.
Specifically, the melting point of the low-temperature solder 42 is lower than 250 ℃, the optional materials are lead, tin, bismuth and the like, in the preparation process of the high-temperature superconducting conductor, the temperature of the conductor is heated to be 10-20 ℃ higher than the melting point of the low-temperature solder 42, the low-temperature solder 42 can fully fill the gap between the high-temperature superconducting stacking belt 1 and the inner-layer cladding 2, the uniformity of the electromagnetic stress in the high-temperature superconducting stacking belt 1 can be improved, the stress generated when the inner-layer cladding 2 is subjected to plastic deformation can uniformly act on the high-temperature superconducting stacking belt 1, the high-temperature superconducting stacking belt 1 cannot lose superconductivity, and the superconductivity decline of the high-temperature superconducting stacking belt 1 caused by stress concentration can be reduced; in addition, the low-temperature solder 42 can fully and effectively connect the high-temperature superconducting stacked belt 1 with the inner-layer cladding 2, and is beneficial to rapidly and transversely transferring current and heat in critical conditions, so that the high-temperature superconducting conductor keeps high thermal stability.
Specifically, in the preparation process of the double-layer clad high-temperature superconducting conductor, the high-temperature superconducting stacked belt 1 is formed by stacking a plurality of layers of high-temperature superconducting tapes 11 and is welded into a cuboid shape through low-temperature welding flux 42, then the high-temperature superconducting stacked belt 1 is coated by the welding flux embedded with metal wires 41 to form a circular supporting layer 4, then the high-temperature superconducting stacked belt 1 with the supporting layer 4 penetrates into an inner-layer clad 2 and is drawn, and finally an outer-layer clad 3 is coated on the outermost layer and is drawn to form the final double-layer clad high-temperature superconducting conductor.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A double clad high temperature superconducting conductor, comprising:
a high temperature superconducting stacked tape;
the inner-layer cladding is made of alloy materials and is wrapped outside the high-temperature superconducting stacking belt;
the outer-layer cladding is made of pure metal and covers the inner-layer cladding.
2. The double-clad high temperature superconducting conductor of claim 1, further comprising a support layer that is formed by cladding the high temperature superconducting stacked tape with a low temperature solder embedded with a wire, the support layer being located within the inner clad.
3. The double-clad high-temperature superconducting conductor of claim 2, wherein the metal wire is made of pure metal and is made of high-purity copper, aluminum or silver.
4. The double-clad high temperature superconducting conductor of claim 2, wherein the solder material of the low temperature solder comprises lead, tin or bismuth.
5. The double-clad high temperature superconducting conductor of claim 4, wherein the low temperature solder has a melting point of less than 250 ℃.
6. The double-clad high temperature superconducting conductor of claim 1, wherein the high temperature superconducting stacked tape is composed of at least two layers of high temperature superconducting tapes.
7. The double clad high temperature superconductor of claim 6, wherein the high temperature superconducting tapes are stacked in a layer-by-layer arrangement.
8. The double-clad high temperature superconducting conductor of claim 1, wherein the inner clad is made of copper alloy or aluminum alloy.
9. The double-clad high temperature superconducting conductor of claim 1, wherein the outer clad is made of high purity copper, aluminum or silver.
10. The double-clad high temperature superconducting conductor of claim 1, wherein the high temperature superconducting stacked tape is rectangular in cross-section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220911396.5U CN217405178U (en) | 2022-04-14 | 2022-04-14 | Double-layer cladding high-temperature superconducting conductor |
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| CN202220911396.5U CN217405178U (en) | 2022-04-14 | 2022-04-14 | Double-layer cladding high-temperature superconducting conductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115579184A (en) * | 2022-11-14 | 2023-01-06 | 核工业西南物理研究院 | Superconducting conductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115579184A (en) * | 2022-11-14 | 2023-01-06 | 核工业西南物理研究院 | Superconducting conductor |
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