CN101577166A - High-field superconducting solenoid coil with dispersive stress and winding method thereof - Google Patents
High-field superconducting solenoid coil with dispersive stress and winding method thereof Download PDFInfo
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- CN101577166A CN101577166A CNA2009100805743A CN200910080574A CN101577166A CN 101577166 A CN101577166 A CN 101577166A CN A2009100805743 A CNA2009100805743 A CN A2009100805743A CN 200910080574 A CN200910080574 A CN 200910080574A CN 101577166 A CN101577166 A CN 101577166A
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Abstract
The invention discloses a high-field superconducting solenoid coil with dispersive stress and a winding method thereof. The superconducting coil is divided into a plurality of layers by a stainless support layer; the superconducting coil is firstly wound into a superconducting line layer from inside to outside according to a radial direction; the outer surface of the superconducting line layer is wound with stainless steel wires by 1-2 layers, wherein the stainless steel wire is the same as the superconducting line in diameter, therefore, a stainless steel wire support layer is formed. Then alternative winding is carried out in sequence, finally the outermost end of the superconducting coil uses rectangular stainless steel wires to wind a support structure at the end so as to strengthen the whole coil and form the whole superconducting solenoid coil with dispersive stress. The invention not only can reduce the stress concentration in the superconducting winding, but also can greatly reduce the quench exercise times of the coil, and effectively improve the density of running current of the magnet. The coil with the structure is suitable for a high-field superconducting magnet system, in particular to a 25 to 30 T high-field superconducting magnet system.
Description
Technical field
The present invention relates to a kind of highfield superconducting magnet coil and winding method thereof, particularly a kind of highfield superconducting solenoid coil and winding method thereof with dispersive stress supporting construction.
Background technology
Superconducting magnet has characteristics such as volume is little, in light weight, energy consumption is low.Development is used for the highfield superconducting magnet system that physics, biomedicine and other scientific researches are used, and superconducting magnet has bigger advantage than hybrid magnet and pulse magnet.The large-scale superconducting magnet and the nmr magnet system of development 25～30T highfield are the important directions of highfield superconducting magnet application development at present.Usually the highfield superconducting magnet is realized with the form of non-homogeneous electric current distribution by multiple superconducting wire.
The superconducting magnet of highfield operates under higher current density and the higher magnetic field, and the interaction in electric current and magnetic field produces angle stress σ in solenoid coil
θ=jBr.If the average current density of magnet operation is 10
8A/m
2, the mean radius of coil is 0.4m, and the magnetic field that is produced is 30T, and then the maximum angular that produces in the superconducting line is 1200MPa to stress.No matter superconducting line is belt material of high temperature superconduct or low-temperature superconducting wire, and the stress that is subjected to surpasses after the certain limit, and its critical current density all can sharply descend.For example the maximum degeneration stress of NbTi superconducting line is about 300-400MPa, Nb
3The strain that the Sn superconducting line can bear is less than 0.4%, the maximum stress of the belt material of high temperature superconduct of use stainless steel reinforcing band is at 300MPa, the belt material of high temperature superconduct maximum stress that does not have the stainless steel reinforcing band is less than 100MPa, and the maximum stress that the YBCO two generations hts band of strengthening based on base band bears can arrive the scope of 300-500MPa.Therefore, mechanical stress and material yield are to cause the highfield superconducting magnet coil can not bear one of major reason of big current delivery.
The main at present stress that adopts the method that supports the superconducting coil circumference stress to reduce superconducting coil is concentrated, promptly after a superconducting coil coiling is finished, at its outer surface coiling parcel stainless steel wire layer coil is reinforced, it is very effective that the superconducting magnet that this method for supporting is less for magnetic field, the room temperature hole is less solves the concentrated problem of stress.But the number of turn and the number of plies of the highfield superconducting magnet coil of 25～30T are more, because the magnet internal stress is too high, the stainless steel wire layer of depending the coil outer surface alone is not enough to solve the problem of stress concentration of superconducting coil.Use single peripheral method of reinforcing to suppress the maximum degeneration stress value that stress meets or exceeds the superconducting line critical current.In addition for radially thicker superconducting coil, because the even distribution of coiling tension force, cause after coil winding finishes, the tensile stress of the internal layer of coil reduces, and adopts the method for peripheral coiling stainless steel wire little to the effect that disperses coil stress.
Summary of the invention
In order to overcome the problem that existing highfield superconducting magnet stress is concentrated, the present invention proposes a kind of highfield superconducting solenoid coil structure with dispersive stress.The present invention not only can reduce the stress of superconduction winding inside and concentrate, and can reduce the quench exercise number of times of coil greatly, effectively improves the running current density of magnet.
The present invention adopts layering stainless steel wire supporting construction, and the main electromagnetic stress of coil can directly be transferred on the stainless steel wire supporting layer.Adopt layering stainless steel wire supporting layer ruggedized construction, the superconducting coil internal stress distribution is comparatively even.The deformation quantity that the selection of stainless steel wire supporting layer thickness should be subjected to electromagnetic stress with superconducting coil is a standard less than 0.4% of coil overall dimensions.
Highfield of the present invention superconducting solenoid coil is divided into several layers by the stainless steel supporting layer with superconducting coil, coil at first is the superconducting line layer by radial direction from inside to outside, be the stainless steel supporting layer then, replace successively, the outermost end of superconducting coil is used the stainless steel wire coiling end support structure consolidate coil integral body of cross section as rectangle.So alternately the superconducting coil finished of coiling have structural strength better, the stress characteristics of disperseing, can bear higher electromagnetic stress, coil may operate under high current density and the highfield.
The winding method of coil of the present invention is the superconducting solenoid coil with circle or the coiling of rectangle superconducting line, use the circular stainless steel wire coiling one identical to two-layer at the outer surface of superconducting solenoid coil then, form the stainless steel wire supporting layer with the superconducting line footpath of superconducting solenoid coil.Again at the outer surface coiling superconducting solenoid coil two of stainless steel wire supporting layer, on the outer surface of superconducting solenoid coil two, use the circular stainless steel wire coiling one of same diameter to two-layer successively again, form stainless steel supporting layer two, replace coiling superconducting solenoid coil and stainless steel supporting layer then successively, at last use the stainless steel wire coiling end support structure consolidate coil integral body of cross section as rectangle in the outermost end of superconducting coil, formation has the superconducting solenoid coil integral body of dispersive stress.
The cross sectional shape of the stainless steel wire of stainless steel supporting layer of the present invention is identical with size with the cross sectional shape of the superconducting line of the superconducting coil of its support with size.
Highfield superconducting solenoid coil with dispersive stress supporting construction of the present invention is applicable to the highfield superconducting magnet system, particularly multi-thread circle superconducting magnet system, highfield nulcear magnetic resonance (NMR) superconducting magnet system (NMR) and mix highfield extrapolation magnet system or the like, particularly 25～30T highfield superconducting magnet system for example.
Description of drawings
Fig. 1 is the structural representation that adopts the superconducting solenoid coil of circular superconducting line, among the figure: 1 superconducting solenoid coil one, 2 stainless steel wire supporting layers one, 3 superconducting solenoid coils two, 4 stainless steel wire supporting layers two, 5 end support structure one;
Fig. 2 is the structural representation that adopts the superconducting solenoid coil of rectangle superconducting line; 6 rectangular lines superconducting line solenoid coils one, 7 rectangular lines stainless steel wire supporting layers one, 8 rectangular lines superconducting line solenoid coils two, 9 rectangular lines stainless steel wire supporting layers two, 10 end support structure two;
Fig. 3 is the superconducting solenoid coil overall schematic, among the figure: 11 superconducting line layers one, 12 stainless steel wire supporting layers one, 13 superconducting line layers two, 14 stainless steel wire supporting layers two, 15 end portion supports layers;
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Highfield of the present invention superconducting solenoid coil is divided into several layers by the stainless steel supporting layer with superconducting coil, coil at first is the superconducting line layer by radial direction from inside to outside, be the stainless steel supporting layer then, replace successively, the outermost end of superconducting coil is used the stainless steel wire coiling end support structure consolidate coil integral body of cross section as rectangle.So alternately the superconducting coil finished of coiling have structural strength better, the stress characteristics of disperseing, can bear higher electromagnetic stress, coil may operate under high current density and the highfield.
As shown in Figure 1, superconducting solenoid coil 1 with circular superconducting line coiling, use the circular stainless steel wire coiling one identical to two-layer at the outer surface of superconducting solenoid coil 1 then, form stainless steel wire supporting layer 1 with the superconducting line footpath of superconducting solenoid coil 1.Again at the outer surface coiling superconducting solenoid coil 23 of stainless steel wire supporting layer 1, on the outer surface of superconducting solenoid coil 23, use the circular stainless steel wire coiling one of same diameter to two-layer successively again, form stainless steel supporting layer 24, replace coiling superconducting solenoid coil and stainless steel supporting layer then successively, at last use the stainless steel wire coiling end support structure one 5 consolidate coil integral body of cross section as rectangle in the outermost end of superconducting coil, formation has the superconducting solenoid coil integral body of dispersive stress.
As shown in Figure 2, rectangular lines superconducting solenoid coil 1 with the coiling of rectangular lines superconducting line, use the rectangular lines stainless steel wire coiling one identical to two-layer at the outer surface of rectangular lines superconducting solenoid coil 1 then, form rectangular lines stainless steel wire supporting layer 1 with the superconducting line footpath of rectangular lines superconducting solenoid coil 1.Again at the outer surface coiling rectangular lines superconducting solenoid coil 28 of rectangular lines stainless steel wire supporting layer 1, on the outer surface of rectangular lines superconducting solenoid coil 28, use the rectangle stainless steel wire coiling one of same diameter to two-layer successively again, form rectangular lines stainless steel supporting layer 29, replace coiling superconducting solenoid coil and stainless steel supporting layer then successively, use rectangle stainless steel wire coiling end support structure 2 10 consolidate coil integral body in the outermost end of superconducting coil at last, formation has the superconducting solenoid coil integral body of dispersive stress.
Fig. 3 is the overall schematic of superconducting solenoid coil.Coil at first is a superconducting coil 1 by radial direction from inside to outside, being stainless steel wire supporting layer 1 then, is superconducting coil 2 13 then, is stainless steel supporting layer 2 14 then, alternately coiling so successively, the coil outer surface is reinforced by stainless end portion supports layer 15.
Claims (5)
1, a kind of highfield superconducting solenoid coil with dispersive stress, it is characterized in that, described superconducting solenoid coil is divided into several layers by the stainless steel supporting layer with superconducting coil, superconducting coil at first is a superconducting coil one (11) by radial direction from inside to outside, be stainless steel supporting layer one (12) then, outside the stainless steel supporting layer one (12) is superconducting coil two (13), is stainless steel supporting layer two (14) outside the superconducting coil two (13), and superconducting coil and stainless steel supporting layer replace so successively; The outermost end of superconducting coil is used stainless steel wire coiling end portion supports layer (15) the consolidate coil integral body of cross section as rectangle.
2, the method for the described highfield of coiling claim 1 superconducting solenoid coil, it is characterized in that, at first use superconducting line coiling superconducting solenoid coil one (1), use the stainless steel wire coiling one identical to two-layer at the outer surface of superconducting solenoid coil one (1) then, form stainless steel wire supporting layer one (2) with the superconducting line footpath of superconducting solenoid coil one (1); Again at the outer surface coiling superconducting solenoid coil two (3) of stainless steel wire supporting layer one (2), and then the stainless steel wire coiling one of using same diameter on the outer surface of superconducting solenoid coil two (3) forms stainless steel supporting layer two (4) to two-layer; Replace coiling superconducting solenoid coil and stainless steel supporting layer successively, at last use stainless steel wire coiling end support structure one (5) the consolidate coil integral body of cross section as rectangle in the outermost end of superconducting coil, formation has the superconducting solenoid coil integral body of dispersive stress.
3, according to the method for the described coiling of claim 2 highfield superconducting solenoid coil, it is characterized in that, the superconducting wire of described coiling superconducting solenoid coil one (1) and superconducting solenoid coil two (3) is circle or rectangle, and the STAINLESS STEEL WIRE of coiling stainless steel supporting layer one (2) and stainless steel supporting layer two (4) is circle or rectangle.
According to the supporting construction of the described superconducting coil of claim 2, it is characterized in that 4, the deformation quantity that the selection of stainless steel wire supporting layer thickness should be subjected to electromagnetic stress with superconducting coil is a standard less than 0.4% of coil overall dimensions.
According to the supporting construction of claim 2 or 3 described superconducting coils, it is characterized in that 5, the cross sectional shape of the stainless steel wire of stainless steel supporting layer is identical with size with the cross sectional shape of the superconducting line of the superconducting coil of its support with size.
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| CNA2009100805743A CN101577166A (en) | 2009-03-20 | 2009-03-20 | High-field superconducting solenoid coil with dispersive stress and winding method thereof |
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| CNA2009100805743A CN101577166A (en) | 2009-03-20 | 2009-03-20 | High-field superconducting solenoid coil with dispersive stress and winding method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010267835A (en) * | 2009-05-15 | 2010-11-25 | Toshiba Corp | Superconductive coil |
| GB2477409A (en) * | 2010-02-02 | 2011-08-03 | Gen Electric | Superconducting magnet including coil layers, support layers and a cooling layer |
| CN103578741A (en) * | 2013-10-31 | 2014-02-12 | 华北电力大学 | Transposition method of two parallel superconducting tapes during winding of solenoid coil |
| CN107670181A (en) * | 2017-11-06 | 2018-02-09 | 中国科学院近代物理研究所 | A kind of inclination solenoid for Gantry magnets |
| CN110060864A (en) * | 2019-04-17 | 2019-07-26 | 华北电力大学 | A method of improving naked high-temperature superconductor double-cake coils transverse resistivity |
| CN111933383A (en) * | 2020-07-16 | 2020-11-13 | 华中科技大学 | Ultrafast cooling pulse magnet adopting all-metal reinforced Polyhelix and manufacturing method thereof |
| JP2021061268A (en) * | 2019-10-02 | 2021-04-15 | 株式会社東芝 | Superconducting coil device |
| CN114141529A (en) * | 2021-12-15 | 2022-03-04 | 中国工程物理研究院流体物理研究所 | Winding tool and winding method for pulse magnet coil |
| CN114613568A (en) * | 2022-03-23 | 2022-06-10 | 华中科技大学 | Superconducting magnet device |
-
2009
- 2009-03-20 CN CNA2009100805743A patent/CN101577166A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010267835A (en) * | 2009-05-15 | 2010-11-25 | Toshiba Corp | Superconductive coil |
| GB2477409A (en) * | 2010-02-02 | 2011-08-03 | Gen Electric | Superconducting magnet including coil layers, support layers and a cooling layer |
| GB2477409B (en) * | 2010-02-02 | 2013-08-07 | Gen Electric | Superconducting magnet assembly and fabricating method |
| CN102142311B (en) * | 2010-02-02 | 2013-09-18 | 通用电气公司 | Superconducting magnet and manufacturing method thereof |
| US8903465B2 (en) | 2010-02-02 | 2014-12-02 | General Electric Company | Superconducting magnet assembly and fabricating method |
| CN103578741A (en) * | 2013-10-31 | 2014-02-12 | 华北电力大学 | Transposition method of two parallel superconducting tapes during winding of solenoid coil |
| CN103578741B (en) * | 2013-10-31 | 2015-12-30 | 华北电力大学 | The interchanging method of a kind of two superconducting tape magnetic plugs in parallel coiling |
| CN107670181B (en) * | 2017-11-06 | 2019-08-27 | 中国科学院近代物理研究所 | A kind of inclination solenoid for Gantry magnet |
| CN107670181A (en) * | 2017-11-06 | 2018-02-09 | 中国科学院近代物理研究所 | A kind of inclination solenoid for Gantry magnets |
| CN110060864A (en) * | 2019-04-17 | 2019-07-26 | 华北电力大学 | A method of improving naked high-temperature superconductor double-cake coils transverse resistivity |
| JP2021061268A (en) * | 2019-10-02 | 2021-04-15 | 株式会社東芝 | Superconducting coil device |
| JP7210411B2 (en) | 2019-10-02 | 2023-01-23 | 株式会社東芝 | Superconducting coil device |
| CN111933383A (en) * | 2020-07-16 | 2020-11-13 | 华中科技大学 | Ultrafast cooling pulse magnet adopting all-metal reinforced Polyhelix and manufacturing method thereof |
| CN111933383B (en) * | 2020-07-16 | 2021-11-19 | 华中科技大学 | Ultrafast cooling pulse magnet adopting all-metal reinforced Polyhelix and manufacturing method thereof |
| CN114141529A (en) * | 2021-12-15 | 2022-03-04 | 中国工程物理研究院流体物理研究所 | Winding tool and winding method for pulse magnet coil |
| CN114613568A (en) * | 2022-03-23 | 2022-06-10 | 华中科技大学 | Superconducting magnet device |
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