CN112420373A - Manufacturing method of YBCO high-temperature superconducting magnet - Google Patents
Manufacturing method of YBCO high-temperature superconducting magnet Download PDFInfo
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- CN112420373A CN112420373A CN202011120368.3A CN202011120368A CN112420373A CN 112420373 A CN112420373 A CN 112420373A CN 202011120368 A CN202011120368 A CN 202011120368A CN 112420373 A CN112420373 A CN 112420373A
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- magnet
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- single cake
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/048—Superconductive coils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
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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 manufacturing a YBCO high-temperature superconducting magnet, which is used for preparing a YBCO high-temperature superconducting coil winding formed by a magnet inner ring, a magnet lower bottom plate, a lower layer single cake, an upper layer single cake, insulating paper, a metal binding belt, a magnet outer ring, a magnet upper plate, an epoxy glue inlet and an epoxy glue exhaust port. The manufacturing method is suitable for winding and vacuum impregnation of the YBCO high-temperature superconducting magnet, and ensures the function of non-attenuation of the current capacity of the YBCO high-temperature superconducting magnet.
Description
Technical Field
The invention belongs to a superconducting magnet manufacturing technology, and particularly relates to a manufacturing method of a YBCO high-temperature superconducting magnet.
Background
The YBCO high-temperature superconducting strip has better flow capacity than that of a Bi high-temperature superconducting strip due to a back field, contains few noble metal silver and has potential reduction possibility in price, so that the YBCO high-temperature superconducting strip has good application prospect when being used for winding a high-temperature superconducting magnet.
Unlike Bi-based high-temperature superconducting tapes, YBCO high-temperature superconducting tapes have a layered structure, and although the tensile strength of the tape is high, the inherent defects are that the interlayer bonding strength is poor and interlayer peeling is easy to occur. By adopting the YBCO high-temperature superconducting magnet of the common winding and epoxy impregnation process, the surface of a YBCO strip is easy to generate interlayer stripping force due to the shrinkage difference of different materials in the magnet at low temperature, so that the through-flow characteristic of the magnet is seriously attenuated, and serious obstacle is caused to the application of the YBCO high-temperature superconducting magnet.
Disclosure of Invention
The invention aims to provide a manufacturing method of a YBCO high-temperature superconducting magnet aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a manufacturing method of a YBCO high-temperature superconducting magnet is used for manufacturing the YBCO high-temperature superconducting magnet consisting of a magnet inner ring, a magnet lower bottom plate, a lower layer single cake, an upper layer single cake, insulating paper, a metal binding tape, a magnet outer ring and a magnet upper plate, wherein the magnet upper plate is respectively provided with an epoxy glue inlet and an epoxy glue exhaust port; comprises the following steps
Winding a YBCO high-temperature superconducting coil:
a) connecting a lower bottom plate of the magnet with an inner ring of the magnet through a fastener, fixing the lower bottom plate of the magnet on a winding machine, then flatly laying a layer of insulating paper with the thickness of 0.1-0.3 mm on the lower bottom plate of the magnet, fixing the insulating paper by gluing, and coating a layer of thin silicone grease on one surface of the insulating paper close to a coil;
b) firstly winding a lower layer single cake, taking an inner ring of a magnet as a winding framework, tightly attaching a bare tape of a YBCO high-temperature superconducting tape without insulation and a Teflon adhesive tape with the thickness of 0.025-0.05 mm to insulating paper and winding the bare tape and the Teflon adhesive tape on the inner ring of the magnet together, and winding to obtain a lower layer single cake;
c) after the lower layer single cake is wound, coating a thin silicone grease layer on the upper plane of the lower layer single cake, then spreading a layer of insulating paper with the thickness of 0.1-0.3 mm on the upper plane of the lower layer single cake, and coating a thin silicone grease layer on the insulating paper;
d) winding according to the method in the step b) to obtain an upper layer single cake, coating a thin silicone grease layer on the upper plane of the upper layer single cake after winding, and then spreading a layer of insulating paper with the thickness of 0.1-0.3 mm on the upper plane of the upper layer single cake;
e) then winding a metal binding belt on the outermost layer of the lower layer single-cake and upper layer single-cake double-cake coil for binding reinforcement;
f) finally, the magnet outer ring and the magnet upper plate are connected and installed through a fastener;
vacuum impregnation of a YBCO high-temperature superconducting magnet:
g) coating silica gel on peripheral gap positions among the magnet inner ring, the magnet lower bottom plate, the magnet outer ring and the magnet upper plate for sealing, so that a sealed space is formed in the gap space inside the magnet, after the silica gel is cured, connecting an epoxy gel inlet with an epoxy gel bottle through a valve, connecting an epoxy gel exhaust port with a vacuum pump through the valve for vacuumizing, and filling normal-temperature curable epoxy gel through atmospheric pressure difference to realize epoxy vacuum impregnation and normal-temperature curing.
Further, the winding tensile stress of the superconducting tapes in the step b) and the step d) is controlled to be 30-40N/mm2。
The invention has the beneficial effects that:
1, through the mode that a bare YBCO high-temperature superconducting tape and a Teflon adhesive tape are wound together in a parallel mode and the winding tension is increased, turn-to-turn insulation is realized, epoxy glue is not easy to enter the turn-to-turn, and compared with the mode that the Teflon adhesive tape or a polyimide tape is stacked on the superconducting tape, the thickness of a single turn is reduced, and the tightness and uniformity between turns are increased.
And 2, the upper plane and the lower plane of the superconducting coil are in contact with a layer of thin silicone grease, so that the epoxy glue is isolated from the side edge of the superconducting tape, and the acting force of the epoxy glue on the side edge of the superconducting tape at low temperature is weakened.
And 3, sealing the gap inside the superconducting magnet into a vacuum cavity, and performing vacuum impregnation and normal-temperature curing by using the epoxy adhesive capable of being cured at normal temperature, wherein the impregnation effect is good, and the internal thermal stress of the magnet at normal temperature is small compared with a high-temperature curing mode.
Drawings
Fig. 1 is a schematic structural diagram of a YBCO high-temperature superconducting magnet.
Fig. 2 is a partially enlarged view of fig. 1.
The figures are numbered: 1-magnet inner ring, 2-magnet lower bottom plate, 3-lower layer single cake, 31-lower layer Teflon adhesive tape, 32-lower layer superconducting tape bare tape, 4-upper layer single cake, 41-upper layer Teflon adhesive tape, 42-upper layer superconducting tape bare tape, 5-insulating paper, 6-metal binding tape, 7-magnet outer ring, 8-magnet upper plate, 81-epoxy adhesive inlet, 82-epoxy adhesive exhaust port, 9-silicone grease and 10-silicone rubber.
Detailed Description
The technical scheme of the invention is clearly and completely described in the following by combining the specific drawings and the embodiment.
Referring to fig. 1 and 2, the YBCO high-temperature superconducting magnet for manufacturing includes a closed cavity formed by a magnet inner ring 1, a magnet lower bottom plate 2, a magnet outer ring 7 and a magnet upper plate 8, and a YBCO high-temperature superconducting coil arranged in the cavity, where the YBCO high-temperature superconducting coil includes a lower layer single cake 3, an upper layer single cake 4, and insulating paper 5 clamped in the middle, the lower layer single cake 3 and the upper layer single cake 4 are fixed by a metal binding belt 6, and the magnet upper plate 8 is provided with an epoxy glue inlet 81 and an epoxy glue exhaust port 82, respectively, where the YBCO high-temperature superconducting magnet manufacturing method includes two major steps of winding the YBCO high-temperature superconducting coil and vacuum impregnation of the YBCO high-temperature superconducting magnet, specifically as follows.
1, winding a YBCO high-temperature superconducting coil:
a) the lower magnet base plate 2 and the inner magnet ring 1 are connected through a fastener and fixed on a winding machine, a layer of insulating paper 5 with the thickness of 0.1-0.3 mm is paved on the lower magnet base plate 2 and fixed by gluing, and one surface of the insulating paper 5, which is close to a coil, is coated with a layer of thin silicone grease 9.
b) Firstly winding a lower layer single cake 3, taking a magnet inner ring 1 as a winding framework, tightly attaching a lower layer superconducting tape bare tape 32 without insulation and a lower layer Teflon adhesive tape 31 with the thickness of 0.025-0.05 mm to insulating paper 5 and winding on the magnet inner ring 1, and controlling the thickness to be 30-40N/mm2And winding to obtain the lower layer single cake 3.
c) After the lower layer single cake 3 is wound, a layer of thin silicone grease 9 is coated on the upper plane of the lower layer single cake 3, then a layer of insulating paper 5 with the thickness of 0.1-0.3 mm is paved on the upper plane, and a layer of thin silicone grease 9 is coated on the insulating paper 5.
d) According to the method of the step b), the magnet inner ring 1 is used as a winding framework, an upper layer of superconducting tape bare tape 42 without insulation and an upper layer of Teflon adhesive tape 41 with the thickness of 0.025-0.05 mm are clung to the insulating paper 5 and wound on the magnet inner ring 1, and the N/mm is controlled to be 30-40N/mm2And winding to obtain an upper layer single cake 4, coating a thin silicone grease 9 on the upper plane of the upper layer single cake 4 after winding is finished, and then spreading a layer of insulating paper 5 with the thickness of 0.1-0.3 mm on the upper plane.
e) And then a metal binding belt 6 is wound on the outermost layer of the double-cake coil consisting of the lower layer single cake 3 and the upper layer single cake 4, and the binding belt is used for binding and reinforcing.
f) And finally, the magnet outer ring 7 and the magnet upper plate 8 are connected and installed through fasteners.
2, vacuum impregnation of the YBCO high-temperature superconducting magnet:
g) the vacuum impregnation epoxy glue is normal temperature curable epoxy glue, silica gel 10 is smeared on the peripheral gap positions among the magnet inner ring 1, the magnet lower bottom plate 2, the magnet outer ring 7 and the magnet upper plate 8 for sealing, so that a closed space is formed in the gap space inside the magnet, after the silica gel 10 is cured, an epoxy glue inlet 81 is connected with an epoxy glue bottle through a valve, an epoxy glue exhaust port 82 is connected with a vacuum pump through the valve, the gap inside the YBCO high-temperature superconducting magnet is firstly vacuumized, after the gap space inside the magnet is vacuumized, the normal temperature curable epoxy glue is filled through atmospheric pressure difference, the epoxy vacuum impregnation and the normal temperature curing are realized, and the silica gel 10 is removed after the curing is finished.
According to the manufacturing method of the YBCO high-temperature superconducting magnet, the YBCO high-temperature superconducting strip and the Teflon adhesive tape are wound together, the epoxy adhesive is dipped in vacuum, the epoxy adhesive is cured at normal temperature and the like, so that the functions of no interlayer peeling and no attenuation of the through-flow capacity of the YBCO high-temperature superconducting magnet are realized at low temperature.
It is to be understood that the above-described embodiments are only a few, and not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (2)
1. A manufacturing method of a YBCO high-temperature superconducting magnet is characterized by comprising the following steps: the superconducting magnet is used for manufacturing a YBCO high-temperature superconducting magnet consisting of a magnet inner ring (1), a magnet lower bottom plate (2), a lower layer single cake (3), an upper layer single cake (4), insulating paper (5), a metal binding band (6), a magnet outer ring (7) and a magnet upper plate (8), wherein the magnet upper plate (8) is respectively provided with an epoxy glue inlet (81) and an epoxy glue exhaust port (82); comprises the following steps
a) Connecting a magnet lower base plate (2) with a magnet inner ring (1) through a fastener, fixing the magnet lower base plate on a winding machine, then flatly laying a layer of insulating paper (5) with the thickness of 0.1-0.3 mm on the magnet lower base plate (2) and fixing the insulating paper (5) by gluing, and coating a layer of silicone grease (9) on the insulating paper (5);
b) taking the magnet inner ring (1) as a winding framework, tightly attaching the lower layer superconducting tape bare tape (32) without insulation and the lower layer Teflon adhesive tape (31) with the thickness of 0.025-0.05 mm to the insulating paper (5) and winding on the magnet inner ring (1) together, and winding to obtain a lower layer single cake (3);
c) coating a layer of silicone grease (9) on the lower layer of single cake (3), flatly paving a layer of insulating paper (5) with the thickness of 0.1-0.3 mm, and coating a layer of silicone grease (9) on the insulating paper (5);
d) winding according to the method in the step b) to obtain an upper layer single cake (4), coating a thin silicone grease (9) on the upper layer single cake (4), and flatly paving a layer of insulating paper (5) with the thickness of 0.1-0.3 mm;
e) then, winding a metal binding belt (6) on the outermost layer of the lower layer single cake (3) and the upper layer single cake (4) for binding and reinforcing;
f) finally, the magnet outer ring (7) and the magnet upper plate (8) are connected and installed through a fastener;
g) and coating silica gel (10) on the peripheral gap positions among the magnet inner ring (1), the magnet lower bottom plate (2), the magnet outer ring (7) and the magnet upper plate (8) for sealing, so that a closed space is formed in the gap space inside the magnet, after the silica gel (10) is cured, connecting an epoxy adhesive inlet (81) with an epoxy adhesive bottle through a valve, connecting an epoxy adhesive exhaust port (82) with a vacuum pump through the valve for vacuumizing, and filling the epoxy adhesive capable of being cured at normal temperature through atmospheric pressure difference to realize epoxy vacuum impregnation and normal temperature curing.
2. The method for manufacturing the YBCO high-temperature superconducting magnet according to claim 1, wherein the winding tensile stress of the superconducting strip in the steps b) and d) is controlled to be 30-40N/mm2。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011120368.3A CN112420373B (en) | 2020-10-19 | 2020-10-19 | Manufacturing method of YBCO high-temperature superconducting magnet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011120368.3A CN112420373B (en) | 2020-10-19 | 2020-10-19 | Manufacturing method of YBCO high-temperature superconducting magnet |
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| CN112420373A true CN112420373A (en) | 2021-02-26 |
| CN112420373B CN112420373B (en) | 2022-05-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555182A (en) * | 2021-09-22 | 2021-10-26 | 上海超导科技股份有限公司 | Superconducting coil and method of manufacture |
| CN113658754A (en) * | 2021-08-12 | 2021-11-16 | 宜宾职业技术学院 | Gallium-based superconducting bulk material impregnation curing system |
Citations (5)
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|---|---|---|---|---|
| JPH09129438A (en) * | 1995-10-30 | 1997-05-16 | Hitachi Ltd | Oxide superconductive coil and manufacture thereof |
| CN101847505A (en) * | 2010-05-28 | 2010-09-29 | 常州联力变压器有限公司 | Dry type transformer and manufacturing method thereof |
| CN103117145A (en) * | 2013-03-12 | 2013-05-22 | 中国科学院电工研究所 | Insulation and cooling spacing layer of high temperature superconducting non-inductive coil |
| JP2015023056A (en) * | 2013-07-16 | 2015-02-02 | 株式会社フジクラ | Laminated superconducting pancake coil and superconducting apparatus including the same |
| CN209561117U (en) * | 2019-04-01 | 2019-10-29 | 西安西电电气研究院有限责任公司 | Superconduction double-cake coils and superconducting energy storage current limliting magnet |
-
2020
- 2020-10-19 CN CN202011120368.3A patent/CN112420373B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09129438A (en) * | 1995-10-30 | 1997-05-16 | Hitachi Ltd | Oxide superconductive coil and manufacture thereof |
| CN101847505A (en) * | 2010-05-28 | 2010-09-29 | 常州联力变压器有限公司 | Dry type transformer and manufacturing method thereof |
| CN103117145A (en) * | 2013-03-12 | 2013-05-22 | 中国科学院电工研究所 | Insulation and cooling spacing layer of high temperature superconducting non-inductive coil |
| JP2015023056A (en) * | 2013-07-16 | 2015-02-02 | 株式会社フジクラ | Laminated superconducting pancake coil and superconducting apparatus including the same |
| CN209561117U (en) * | 2019-04-01 | 2019-10-29 | 西安西电电气研究院有限责任公司 | Superconduction double-cake coils and superconducting energy storage current limliting magnet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658754A (en) * | 2021-08-12 | 2021-11-16 | 宜宾职业技术学院 | Gallium-based superconducting bulk material impregnation curing system |
| CN113658754B (en) * | 2021-08-12 | 2023-02-24 | 宜宾职业技术学院 | Gallium-based superconducting bulk material impregnation curing system |
| CN113555182A (en) * | 2021-09-22 | 2021-10-26 | 上海超导科技股份有限公司 | Superconducting coil and method of manufacture |
| CN113555182B (en) * | 2021-09-22 | 2021-12-14 | 上海超导科技股份有限公司 | Superconducting coil and method of manufacture |
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| CN112420373B (en) | 2022-05-17 |
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