CN112420275A - Method for improving irreversible strain of superconducting tape and superconducting tape - Google Patents
Method for improving irreversible strain of superconducting tape and superconducting tape Download PDFInfo
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- CN112420275A CN112420275A CN202011245078.1A CN202011245078A CN112420275A CN 112420275 A CN112420275 A CN 112420275A CN 202011245078 A CN202011245078 A CN 202011245078A CN 112420275 A CN112420275 A CN 112420275A
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- superconducting tape
- tape
- reinforcing member
- superconducting
- strain
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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
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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
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
- H01B12/04—Single wire
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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
Abstract
The invention discloses a method for improving irreversible strain of a superconducting tape and the superconducting tape for improving the irreversible strain.
Description
Technical Field
The invention relates to the technical field of performance improvement of superconducting tapes, in particular to a method for improving irreversible strain of a superconducting tape and the superconducting tape for improving the irreversible strain.
Background
With the progress of science and technology, the superconducting tape has higher critical current density and superconducting critical temperature, and has good application in superconducting magnets, superconducting current limiters and other equipment. The critical current density J of the superconducting tape is influenced by the action of temperature stress and electromagnetic force inevitably in the ultralow temperature environmentc. But the irreversible strain of commercial superconducting tapes is around 0.6%. Can not satisfy it in a certain placeApplications in these extreme environments. At present, the method for lifting the reversible strain of the superconducting tape mainly comprises welding a metal tape on the superconducting outer layer or lifting the irreversible strain of the substrate, but the lifting space is limited.
Disclosure of Invention
In view of the shortcomings and needs of the prior art, the present invention provides a method for increasing irreversible strain in a superconducting tape and a superconducting tape with increased irreversible strain, which aims to increase tensile irreversible strain in the superconducting tape by pre-compressing the superconducting tape.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a method of raising irreversible strain of a superconducting tape, comprising: and applying external force along the length direction of the superconducting tape to enable the superconducting tape to be in a compressed state, so that precompression of the superconducting tape is realized.
Further, the method of applying an external force along the length of the superconducting tape includes: a reinforcing member for relieving the pretension is connected to the superconducting tape along the length direction of the superconducting tape.
Further, the method of connecting the pre-tension-unloaded reinforcing member to the superconducting tape along a length direction of the superconducting tape includes: applying a tensile force along a length direction of the reinforcing member to achieve pretension of the reinforcing member; covering the reinforcing member on at least one side of the superconducting tape along a length direction of the superconducting tape; and unloading the tensile force of the reinforcing member to apply the deformation force of the reinforcing member to the superconducting tape, so as to pre-compress the superconducting tape.
Further, the reinforcing member is a metal band.
Further, the metal strip is at least one of 316, 304, SK5, 316LN, 65MN, ni-based alloy and beryllium copper.
Further, the reinforcing member is coated on at least one side of the superconducting tape by welding.
According to a second aspect of the present invention, there is provided a superconducting tape for promoting irreversible strain, comprising:
a superconducting tape; a reinforcing member covering at least one side of the superconducting tape; and after the reinforcing member is applied with a pulling force and covers at least one side of the superconducting tape, unloading the pulling force to realize pre-compression of the superconducting tape.
Further, the reinforcing member is a metal band.
Further, the metal strip is at least one of 316, 304, SK5, 316LN, 65MN, nickel-based alloy, and beryllium copper.
Further, the reinforcing member is coated on at least one side of the superconducting tape by welding.
Compared with the prior art, the invention has obvious advantages and beneficial effects. By the technical scheme, the method for improving the irreversible strain of the superconducting tape and the superconducting tape for improving the irreversible strain provided by the invention can achieve considerable technical progress and practicability, have wide industrial utilization value and at least have the following advantages:
(1) by pre-compressing the superconducting tape, the tensile irreversible strain of the superconducting tape is increased.
(2) The superconducting tapes of the superconducting tapes are always in a pre-compressed state by pre-stretching the reinforcing member and unloading the pre-stretching force after the reinforcing member is covered on the superconducting tapes.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram showing the strain versus change in critical current density of a prior art superconducting tape;
fig. 2 is a schematic diagram showing the strain of the superconducting tape of the present invention in response to a change in critical current density.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the predetermined objects, the following detailed description will be given with reference to the accompanying drawings and preferred embodiments of a method for increasing irreversible strain of a superconducting tape and a superconducting tape for increasing irreversible strain according to the present invention.
An embodiment of the present invention provides a method for increasing irreversible strain of a superconducting tape, in which an external force is applied along a length direction of the superconducting tape, so that the superconducting tape is in a compressed state under the external force. The pre-compression of the superconducting tape is realized through the action of external force, and the tensile irreversible strain of the superconducting tape is further improved.
It is known that when the superconducting tape is stretched, the stress-strain of the superconducting tape goes through three stages of elasticity-yield-strengthening, and the strain corresponding to the transition of the elastic section and the yield section is the irreversible strain.
In order to achieve a state in which the superconducting tape is always pre-compressed, a reinforcing member that relieves the pre-tension may be connected to the superconducting tape along the length of the superconducting tape.
In particular, a tensile force is applied in a length direction of the reinforcing member to achieve pretensioning of the reinforcing member. And covering the reinforcing member on at least one side of the superconducting tape along the length direction of the superconducting tape, and unloading the tensile force applied to the reinforcing member so as to apply the deformation force of the reinforcing member to the superconducting tape and realize the pre-compression of the superconducting tape.
Preferably, the reinforcing member is a metal strip which deforms under an applied tensile force, and more specifically, the metal strip lengthens in the direction of the tensile force under the tensile force. At this time, the metal tape (i.e., the reinforcing member) is covered on at least one side (at least one surface) of the superconducting tape, and the tensile force applied to the metal tape is relieved. This deformation force is applied to the superconducting tape, and pre-compression of the superconducting tape is achieved under the deformation force.
More specifically, the metal strip is at least one of 316, 304, SK5, 316LN, 65MN, nickel-based alloy, and beryllium copper. 316 stainless steel, 304 stainless steel, SK5 carbon tool steel, 316LN stainless steel, and 65MN stainless steel, wherein 316 stainless steel, 304 stainless steel, SK5 carbon tool steel, and 316LN stainless steel, and 65MN stainless steel.
In one embodiment, the superconducting tape itself is irreversibly strained to 0.6%, by the method of the present invention, by precompressing the tape by 0.2%. The tensile irreversible strain of the pre-compressed superconducting tape is 0.6% + 0.2% ═ 0.8%. Of course, the precompression of the superconducting tapes may be set according to actual requirements, and the invention is not limited thereto.
Another embodiment of the present invention provides a superconducting tape for promoting irreversible strain, including:
a superconducting tape; a reinforcing member covering at least one side of the superconducting tape; wherein, after the reinforcing component is applied with pulling force and covers at least one side of the superconducting tape, the pulling force is unloaded, and the precompression of the superconducting tape is realized.
It is known that when the superconducting tape is stretched, the stress-strain of the superconducting tape goes through three stages of elasticity-yield-strengthening, and the strain corresponding to the transition of the elastic section and the yield section is the irreversible strain.
In order to achieve a state in which the superconducting tape is always pre-compressed, a reinforcing member that relieves the pre-tension may be connected to the superconducting tape along the length of the superconducting tape.
In particular, a tensile force is applied in a length direction of the reinforcing member to achieve pretensioning of the reinforcing member. And covering the reinforcing member on at least one side of the superconducting tape along the length direction of the superconducting tape, and unloading the tensile force applied to the reinforcing member so as to apply the deformation force of the reinforcing member to the superconducting tape and realize the pre-compression of the superconducting tape.
Preferably, the reinforcing member is a metal strip which deforms under an applied tensile force, and more specifically, the metal strip lengthens in the direction of the tensile force under the tensile force. At this time, the metal tape (i.e., the reinforcing member) is covered on at least one side (at least one surface) of the superconducting tape, and the tensile force applied to the metal tape is relieved. This deformation force is applied to the superconducting tape, and pre-compression of the superconducting tape is achieved under the deformation force.
In one embodiment, the superconducting tape itself is irreversibly strained to 0.6%, by the method of the present invention, by precompressing the tape by 0.2%. The tensile irreversible strain of the pre-compressed superconducting tape is 0.6% + 0.2% ═ 0.8%. Of course, the precompression of the superconducting tapes may be set according to actual requirements, and the invention is not limited thereto.
More specifically, the metal strip is at least one of 316, 304, SK5, 316LN, 65MN, nickel-based alloy, and beryllium copper. 316 stainless steel, 304 stainless steel, SK5 carbon tool steel, 316LN stainless steel, and 65MN stainless steel, wherein 316 stainless steel, 304 stainless steel, SK5 carbon tool steel, and 316LN stainless steel, and 65MN stainless steel.
Fig. 1 shows the variation of the tensile irreversible strain of a superconducting tape in the prior art versus the normalized critical current density. From the experimental data, it is understood that the normalized critical current density of the superconducting tape of the prior art shows a tendency to gradually decrease with the increase of the irreversible strain.
Fig. 2 shows the relationship between the variation of the tensile irreversible strain of the superconducting tape of the present application, which promotes irreversible strain, and the normalized critical current density. As can be seen from fig. 2, the irreversible strain of the superconducting tape can be increased from 0.6% to around 1% by precompression of the tape. The normalized critical current density shows a tendency to increase first and then decrease with increasing strain. Therefore, the superconducting tapes with different precompression amounts can be designed according to the actual working conditions of the superconducting tapes, so that the superconducting tapes can exert the optimal performance.
According to the method for improving the irreversible strain of the superconducting tape and the superconducting tape for improving the irreversible strain, disclosed by the embodiment of the invention, the tensile irreversible strain of the superconducting tape is improved by pre-compressing the superconducting tape. The precompression amount of the superconducting tape can be adjusted to obtain the superconducting tapes with different mechanical properties, so that the superconducting tape meets various application environments and has great engineering application significance.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method of promoting irreversible strain in a superconducting tape, comprising:
and applying external force along the length direction of the superconducting tape to enable the superconducting tape to be in a compressed state, so that precompression of the superconducting tape is realized.
2. The method of claim 1, wherein the applying an external force along the length of the superconducting tape comprises:
a reinforcing member for relieving the pretension is connected to the superconducting tape along the length direction of the superconducting tape.
3. The method of claim 2, wherein the step of attaching a pre-stress relieved reinforcement member to the superconducting tape along the length of the tape comprises:
applying a tensile force along a length direction of the reinforcing member to achieve pretension of the reinforcing member;
covering the reinforcing member on at least one side of the superconducting tape along a length direction of the superconducting tape;
and unloading the tensile force of the reinforcing member to apply the deformation force of the reinforcing member to the superconducting tape, so as to pre-compress the superconducting tape.
4. A method of raising the irreversible strain of a superconducting tape according to claim 2 or 3, wherein the reinforcing member is a metal tape.
5. The method of raising the irreversible strain of the superconducting tape of claim 4, wherein the metallic tape is at least one of 316, 304, SK5, 316LN, 65MN, nickel-based alloy, and beryllium copper.
6. A method of inducing irreversible strain in a superconducting tape according to claim 2 or claim 3 wherein the reinforcing member is applied to at least one side of the tape by welding.
7. A superconducting tape for promoting irreversible strain, comprising:
a superconducting tape;
a reinforcing member covering at least one side of the superconducting tape;
and after the reinforcing member is applied with a pulling force and covers at least one side of the superconducting tape, unloading the pulling force to realize pre-compression of the superconducting tape.
8. The irreversibly strained superconducting tape of claim 7, wherein the reinforcing member is a metal tape.
9. The irreversibly strain promoted superconducting tape of claim 8, wherein the metallic tape is at least one of 316, 304, SK5, 316LN, 65MN, nickel-based alloys, and beryllium copper.
10. The irreversibly strained superconducting tape of claim 7, wherein the reinforcing member is applied to at least one side of the superconducting tape by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011245078.1A CN112420275A (en) | 2020-11-10 | 2020-11-10 | Method for improving irreversible strain of superconducting tape and superconducting tape |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011245078.1A CN112420275A (en) | 2020-11-10 | 2020-11-10 | Method for improving irreversible strain of superconducting tape and superconducting tape |
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| CN112420275A true CN112420275A (en) | 2021-02-26 |
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| CN202011245078.1A Pending CN112420275A (en) | 2020-11-10 | 2020-11-10 | Method for improving irreversible strain of superconducting tape and superconducting tape |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437080A (en) * | 1983-02-14 | 1984-03-13 | The United Of America As Represented By The Secretary Of Commerce And The Secretary Of The Air Force | Method and apparatus utilizing crystalline compound superconducting elements having extended strain operating range capabilities without critical current degradation |
| JPH04312711A (en) * | 1991-04-12 | 1992-11-04 | Toshiba Corp | Superconducting conductor |
| US5308801A (en) * | 1992-07-22 | 1994-05-03 | Duke University | Process for the increase in critical temperature of high Tc superconductors |
| US5312802A (en) * | 1989-03-31 | 1994-05-17 | Sumitomo Electric Industries, Ltd. | Oxide superconductive wire, method of manufacturing the same and the products using the same |
| WO1998009296A1 (en) * | 1996-08-30 | 1998-03-05 | American Superconductor Corporation | Improved structure for laminated superconducting ceramic composite conductors and method of manufacture |
| US6510604B1 (en) * | 1997-03-26 | 2003-01-28 | Massachusetts Institute Of Technology | Superconducting cables experiencing reduced strain due to bending |
| JP2010113919A (en) * | 2008-11-05 | 2010-05-20 | Chubu Electric Power Co Inc | Superconducting tape wire and method of manufacturing the same, and superconducting coil |
| CN105308690A (en) * | 2013-06-19 | 2016-02-03 | 住友电气工业株式会社 | Reinforced superconducting wire and method for manufacturing the same |
-
2020
- 2020-11-10 CN CN202011245078.1A patent/CN112420275A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437080A (en) * | 1983-02-14 | 1984-03-13 | The United Of America As Represented By The Secretary Of Commerce And The Secretary Of The Air Force | Method and apparatus utilizing crystalline compound superconducting elements having extended strain operating range capabilities without critical current degradation |
| US5312802A (en) * | 1989-03-31 | 1994-05-17 | Sumitomo Electric Industries, Ltd. | Oxide superconductive wire, method of manufacturing the same and the products using the same |
| JPH04312711A (en) * | 1991-04-12 | 1992-11-04 | Toshiba Corp | Superconducting conductor |
| US5308801A (en) * | 1992-07-22 | 1994-05-03 | Duke University | Process for the increase in critical temperature of high Tc superconductors |
| WO1998009296A1 (en) * | 1996-08-30 | 1998-03-05 | American Superconductor Corporation | Improved structure for laminated superconducting ceramic composite conductors and method of manufacture |
| US6510604B1 (en) * | 1997-03-26 | 2003-01-28 | Massachusetts Institute Of Technology | Superconducting cables experiencing reduced strain due to bending |
| JP2010113919A (en) * | 2008-11-05 | 2010-05-20 | Chubu Electric Power Co Inc | Superconducting tape wire and method of manufacturing the same, and superconducting coil |
| CN105308690A (en) * | 2013-06-19 | 2016-02-03 | 住友电气工业株式会社 | Reinforced superconducting wire and method for manufacturing the same |
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Application publication date: 20210226 |