CN105355358A - Superconducting magnet comprising ferromagnetic rings - Google Patents
Superconducting magnet comprising ferromagnetic rings Download PDFInfo
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- CN105355358A CN105355358A CN201510952835.1A CN201510952835A CN105355358A CN 105355358 A CN105355358 A CN 105355358A CN 201510952835 A CN201510952835 A CN 201510952835A CN 105355358 A CN105355358 A CN 105355358A
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- superconducting
- solenoid coil
- axial line
- superconducting solenoid
- annular
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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
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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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- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The invention discloses a superconducting magnet comprising ferromagnetic rings. The superconducting magnet comprises a non-magnetic cylindrical framework, a superconducting solenoid coil and two annular cover plates, wherein one ferromagnetic ring is embedded on the surface, close to the superconducting solenoid coil, of each annular cover plate and is coaxial with the corresponding annular cover plate; one annular groove with a certain groove depth is formed in the surface, close to the superconducting solenoid coil, of each ferromagnetic ring, accordingly, an inner annular boss and an outer annular boss are formed on the inner edge and the outer edge of each ferromagnetic ring respectively, and the radial width between the inner annular boss and the outer annular boss is equal to the groove depth of each annular groove; the end surface of the superconducting solenoid coil is parallel to the bottom surface of the annular groove at the interval being the groove depth of each annular groove, and the numerical value of the interval between the inner edge of the end surface of the superconducting solenoid coil and the inner annular boss and the numerical value of the interval between the outer edge of the end surface of the superconducting solenoid coil and the outer annular boss are both equal to the groove depth of each annular groove. The critical current of the superconducting magnet is increased by attenuating the vertical magnetic-field component.
Description
Technical field
The present invention relates to superconducting magnet technical field, particularly a kind of superconducting magnet containing ferromagnetic ring.
Background technology
Compared with conventional copper, aluminium conductive wire, superconductivity wire has very high critical current density and is approximately the resistivity of zero.In recent years, be used widely in electric power, energy field by the superconducting magnet of superconductivity wire coiling, as super conductive magnetic storage energy coil, superconducting transformer winding, super conducting electric reactor winding, superconducting generator winding etc.
Superconducting magnet often adopts solenoid hollow coil structure, to obtain higher inductance value and energy storage density.But in this solenoid hollow coil structure, the background magnetic field fundamental component being positioned at the axial line ring layer place of magnet two ends is the perpendicular magnetic component on the wide surface of vertical superconductivity wire.And perpendicular magnetic component is by the critical current density of the superconductivity wire of superconducting magnet inside of greatly decaying, and then increase the operation energy loss of whole superconducting magnet.In order to reduce perpendicular magnetic component size, people often adopt various structural optimization algorithm to be optimized design to end axial line ring layer, as genetic algorithm, simulated annealing etc., but the coil geometry after optimizing is comparatively complicated, add the difficulty of actual coiling and processing, also add the wire bonds point quantity of superconducting magnet inside simultaneously.In addition, also there is researcher to add annular ferromagnetic sheet at the two ends of solenoid hollow coil at present, reducing perpendicular magnetic component by introducing the ferromagnetic sheet with high magnetic permeability.But, the program needs thickness and the larger annular ferromagnetic sheet of width, on the one hand adds additional a large amount of ferromagnetic losses, also add the volume and weight of whole superconducting magnet simultaneously, difficulty is caused to the actual installation of superconducting magnet in cooled cryostat container and operation.In addition, the attenuating of annular ferromagnetic sheet to the perpendicular magnetic component around the inner coil wire of bobbin is poor, easily causes the critical current density of inner coil wire too low, and then causes the potential safety hazards such as wire quench is too fast, local overheating.
Summary of the invention
The object of the invention is to: the perpendicular magnetic component of decay superconducting magnet, and then improve superconducting magnet inside superconductivity wire critical current and reduce the operation energy loss of whole superconducting magnet, optimize structure simultaneously, reduce the volume and weight of superconducting magnet, be convenient to run and install.
In order to realize foregoing invention object, the invention provides a kind of superconducting magnet containing ferromagnetic ring, it comprises non magnetic cylindrical skeleton, superconducting solenoid coil and two annular cover plates, and described superconducting solenoid coil is wound on described non magnetic cylindrical skeleton, the two ends of described non magnetic cylindrical skeleton respectively arrange a described annular cover plate, for covering the both ends of described superconducting solenoid coil, and, at described annular cover plate on the surface of described superconducting solenoid coil, embed a ferromagnetic ring, and described ferromagnetic ring and described annular cover plate coaxial; Wherein,
Described ferromagnetic ring is on the surface of described superconducting solenoid coil, form the annular groove with certain groove depth, thus annular boss and outer ring boss in being formed respectively on the inward flange and outward flange of described ferromagnetic ring, and the radial width of described interior annular boss and described outer ring boss numerically equals the groove depth of described annular groove;
The end face of described superconducting solenoid coil parallels with the bottom surface of described annular groove and spacing is the groove depth of described annular groove, the inside edge of described superconducting solenoid coil end face and the spacing of described interior annular boss and the outer edge of described superconducting solenoid coil end face and the distance values of described outer ring boss is equal to the groove depth of described annular groove.
According to a kind of concrete execution mode, described superconducting solenoid coil is made up of the axial line ring layer of some, and each described axial line ring layer has the identical number of turn; Wherein, be greater than the described axial line ring layer of total amount 1/3rd at the central area magnitude setting of described superconducting solenoid coil, and axial air-gap described in each between axial line ring layer is equal;
After remaining described axial line ring layer being divided equally, be separately positioned on two end regions of described superconducting solenoid coil, and more close to described superconducting solenoid coil end, the described axial air-gap between described axial line ring layer increases progressively.
According to a kind of concrete execution mode, in described superconducting solenoid coil, from the described axial line ring layer of end, one end, a lead-in wire drawn by the inside or outmost coil, the all coils of described axial line ring layer and the coil of drawing described lead-in wire is connected from the inside to the outside or from outside to inside successively, connected with adjacent described axial line ring layer by described axial line ring layer outermost or innermost coil, until every circle coil of all axial line ring layers of described superconducting solenoid coil is all cascaded, finally draw another lead-in wire from other end end outermost or innermost coil.
According to a kind of concrete execution mode, in two end regions of described superconducting solenoid coil, between described axial line ring layer, described axial air-gap is that equal difference increases progressively.
According to a kind of concrete execution mode, described superconducting solenoid coil is by ReBCO superconducting tape, or BSCCO superconducting tape, or the coiling of MgB2 superconducting tape forms.
According to a kind of concrete execution mode, uniform filling nonmagnetic substance in described annular groove, and the nonmagnetic substance of filling does not exceed described annular groove.
According to a kind of concrete execution mode, the outward flange of described annular cover plate is offered at least two axially extending bores, after screw rod being each passed through an axially extending bore on the described annular cover plate being positioned at described non magnetic cylindrical skeleton two ends, lock described screw rod, described annular cover plate to be fixed on the two ends of described non magnetic cylindrical skeleton.
According to a kind of concrete execution mode, the inward flange of described annular cover plate is offered at least two axially extending bores, screw is screwed in described non magnetic cylindrical skeleton, to be fixed on described non magnetic cylindrical skeleton by described annular cover plate through the axially extending bore on inward flange.
Compared with prior art, beneficial effect of the present invention:
1, the ferromagnetic sheet in the present invention can greatly damping vertical magnetic-field component, and then improves the critical current of superconductivity wire of superconducting magnet inside, and reduces the operation energy loss of whole superconducting magnet.
2, the ferromagnetic sheet in the present invention effectively can reduce the perpendicular magnetic component size around the inner coil wire near bobbin, avoids the too low and potential safety hazards such as wire quench that is that cause is too fast, local overheating of critical current density because of inner coil wire.
The thickness of the ferromagnetic sheet 3, in the present invention and width are very little, can not impact the volume and weight of superconducting magnet, are beneficial to the actual installation of superconducting magnet in cooled cryostat container and operation.
4, the superconducting magnet body in the present invention can adopt the direct coiling of single superconductivity wire to form, and reduces the difficulty of actual coiling and processing, and inner without wire bonds point, decreases quench potential safety hazard.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the profile of ferromagnetic ring of the present invention;
Fig. 3 is that one of the present invention implements structure chart;
Fig. 4 is the structural representation of superconducting solenoid coil of the present invention;
Fig. 5 is that another kind of the present invention implements structure chart.
1: non magnetic cylindrical skeleton 2: superconducting solenoid coil 3: annular cover plate 4: ferromagnetic ring 5: screw rod 6: screw 7: nonmagnetic substance
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
The profile of the structural representation of the present invention shown in composition graphs 1 and Fig. 2 difference and ferromagnetic ring of the present invention; Wherein, the present invention is containing the superconducting magnet of ferromagnetic ring, it comprises non magnetic cylindrical skeleton 1, superconducting solenoid coil 2 and two annular cover plates 3, and superconducting solenoid coil 2 is wound on non magnetic cylindrical skeleton 1, the two ends of non magnetic cylindrical skeleton 1 respectively arrange an annular cover plate 3, for covering the both ends of superconducting solenoid coil 2, and, at annular cover plate 3 on the surface of superconducting solenoid coil 2, embed a ferromagnetic ring 4, and ferromagnetic ring 4 is coaxial with annular cover plate 3.
And, at ferromagnetic ring 4 on the surface of superconducting solenoid coil 2, form the annular groove with certain groove depth, thus annular boss and outer ring boss in being formed respectively on the inward flange and outward flange of ferromagnetic ring 4, and the radial width of interior annular boss and outer ring boss numerically equals the groove depth of annular groove.
The end face of superconducting solenoid coil 2 parallels with the bottom surface of annular groove and spacing is the groove depth of annular groove, the outer edge of the inside edge of superconducting solenoid coil 2 end face and the spacing of interior annular boss and superconducting solenoid coil 2 end face and the distance values of outer ring boss is equal to the groove depth of annular groove.
When implementing, the groove depth of annular groove is numerically set to the half of ferromagnetic ring thickness.And, through test and checking, two ends are installed does not have the superconducting magnet of the ferromagnetic ring of annular groove and annular boss, and have annular groove compare with the superconducting magnet of the ferromagnetic ring of annular boss with of the present invention to install at two ends, superconducting magnet of the present invention has larger critical current density.
On this basis, respectively to the groove depth of annular groove, the radial width of annular boss and superconducting solenoid coil end surface side along and the spacing of annular boss, according to the principle of contrast separately, carry out quantitative analysis.
If its dependent variable is certain, only change the groove depth of annular groove, along with groove depth increases gradually, the also corresponding increase of annular boss height in the axial direction, and the current density of superconducting magnet then reduces gradually in increasing gradually, and be ferromagnetic ring thickness one half in groove depth, there is maximum critical current density.
Then, if the groove depth of annular groove is numerically ferromagnetic ring thickness half, the edge of superconducting solenoid coil end face and the spacing of annular boss certain, only change the radial width of annular boss, when the axial width of annular boss increases gradually, the current density of superconducting magnet then reduces gradually in increasing gradually, and be the groove depth of annular groove in radial width, namely ferromagnetic ring thickness one half, has maximum critical current density.
Finally, if the radial width of the groove depth of annular groove and annular boss is by being numerically ferromagnetic ring thickness half, only change the edge of superconducting solenoid coil end face and the spacing of annular boss, when spacing increases gradually, the current density of superconducting magnet then reduces gradually in increasing gradually, and when spacing is the radial width of annular boss, there is maximum critical current density.
One of the present invention shown in composition graphs 3 implements structure chart, and wherein, superconducting solenoid coil 2 of the present invention is made up of the axial line ring layer of some, and each axial line ring layer has the identical number of turn; Wherein, be greater than the axial line ring layer of total amount 1/3rd at the central area magnitude setting of superconducting solenoid coil 2, and axial air-gap between each axial line ring layer is equal.
After remaining axial line ring layer being divided equally, be separately positioned on two end regions of superconducting solenoid coil 2, and more close to superconducting solenoid coil 2 end, the axial air-gap between axial line ring layer increases progressively.
Wherein, between the axial line ring layer of two end regions, the axial air-gap increased progressively is set, perpendicular magnetic component comparatively can be evenly distributed in different axial line ring layers, thus effectively reduce the perpendicular magnetic component size being positioned at the outermost axial line ring layer in superconducting solenoid coil 2 end, improve the critical current of the superconductivity wire of superconducting magnet inside.
When implementing, in two end regions of superconducting solenoid coil 2, between axial line ring layer, axial air-gap is that equal difference increases progressively.
The structural representation of the superconducting solenoid coil of the present invention shown in composition graphs 4, wherein, the connected mode of each axial line ring layer of superconducting solenoid coil 2 of the present invention is for being connected in series.This mode be connected in series is: from the axial line ring layer of end, one end, a lead-in wire drawn by the inside or outmost coil, and the coil of drawing lead-in wire from the inside to the outside or from outside to inside successively series shaft to all coils of coil layer, connected with adjacent axial line ring layer by axial line ring layer outermost or innermost coil, until be all cascaded by every circle coil of all axial line ring layers of superconducting solenoid coil 2, finally draw another lead-in wire from other end end outermost or innermost coil.
Therefore, the superconducting magnet in the present invention can adopt the direct coiling of single superconductivity wire to form, and reduces the difficulty of actual coiling and processing, and inner without wire bonds point, decreases quench potential safety hazard.
In the present invention, superconducting solenoid coil is by ReBCO superconducting tape, or BSCCO superconducting tape, or the coiling of MgB2 superconducting tape forms.
The present invention's another kind shown in composition graphs 5 implements structure chart, wherein, the outward flange of annular cover plate 3 is offered at least two axially extending bores, after screw rod 5 being each passed through an axially extending bore on the annular cover plate 3 being positioned at non magnetic cylindrical skeleton 1 two ends, tie down screw 5, to be fixed on the two ends of non magnetic cylindrical skeleton 1 by annular cover plate 3.
When implementing, the inward flange of annular cover plate 3 being offered at least two axially extending bores, screw 6 being screwed in non magnetic cylindrical skeleton 1 through the axially extending bore on inward flange, annular cover plate 3 being fixed on non magnetic cylindrical skeleton 1.
In the specific implementation, due between the end of superconducting solenoid coil 2 and ferromagnetic ring 4 for there is no supporting construction, and need to keep the end face of superconducting solenoid coil 2 with the parallel of the bottom surface of the annular groove of ferromagnetic ring 4 and spacing is the position relationship of annular groove groove depth, therefore, uniform filling nonmagnetic substance 7 in annular groove, and the nonmagnetic substance 7 of filling does not exceed annular groove, thus avoid in process of production, in large quantities the position of superconducting solenoid coil 2 and ferromagnetic ring 4 is calibrated, reduce production efficiency.
By reference to the accompanying drawings the specific embodiment of the present invention is described in detail above, but the present invention is not restricted to above-mentioned execution mode, in the spirit and scope situation of claim not departing from the application, those skilled in the art can make various amendment or remodeling.
Claims (8)
1. the superconducting magnet containing ferromagnetic ring, comprise non magnetic cylindrical skeleton, superconducting solenoid coil and two annular cover plates, and described superconducting solenoid coil is wound on described non magnetic cylindrical skeleton, the two ends of described non magnetic cylindrical skeleton respectively arrange a described annular cover plate, for covering the both ends of described superconducting solenoid coil, it is characterized in that, at described annular cover plate on the surface of described superconducting solenoid coil, embed a ferromagnetic ring, and described ferromagnetic ring and described annular cover plate coaxial; Wherein,
Described ferromagnetic ring is on the surface of described superconducting solenoid coil, form the annular groove with certain groove depth, thus annular boss and outer ring boss in being formed respectively on the inward flange and outward flange of described ferromagnetic ring, and the radial width of described interior annular boss and described outer ring boss numerically equals the groove depth of described annular groove;
The end face of described superconducting solenoid coil parallels with the bottom surface of described annular groove and spacing is the groove depth of described annular groove, the inside edge of described superconducting solenoid coil end face and the spacing of described interior annular boss and the outer edge of described superconducting solenoid coil end face and the distance values of described outer ring boss is equal to the groove depth of described annular groove.
2. the superconducting magnet containing ferromagnetic ring as claimed in claim 1, it is characterized in that, described superconducting solenoid coil is made up of the axial line ring layer of some, and each described axial line ring layer has the identical number of turn; Wherein, be greater than the described axial line ring layer of total amount 1/3rd at the central area magnitude setting of described superconducting solenoid coil, and axial air-gap described in each between axial line ring layer is equal;
After remaining described axial line ring layer being divided equally, be separately positioned on two end regions of described superconducting solenoid coil, and more close to described superconducting solenoid coil end, the described axial air-gap between described axial line ring layer increases progressively.
3. the superconducting magnet containing ferromagnetic ring as claimed in claim 2, it is characterized in that, in described superconducting solenoid coil, from the described axial line ring layer of end, one end, a lead-in wire drawn by the inside or outmost coil, the all coils of described axial line ring layer and the coil of drawing described lead-in wire is connected from the inside to the outside or from outside to inside successively, connected with adjacent described axial line ring layer by described axial line ring layer outermost or innermost coil, until every circle coil of all axial line ring layers of described superconducting solenoid coil is all cascaded, finally draw another lead-in wire from other end end outermost or innermost coil.
4. the superconducting magnet containing ferromagnetic ring as claimed in claim 2, it is characterized in that, in two end regions of described superconducting solenoid coil, between described axial line ring layer, described axial air-gap is that equal difference increases progressively.
5. the superconducting magnet containing ferromagnetic ring as claimed in claim 2, it is characterized in that, described superconducting solenoid coil is by ReBCO superconducting tape, or BSCCO superconducting tape, or MgB
2superconducting tape coiling forms.
6. the superconducting magnet containing ferromagnetic ring as claimed in claim 1, is characterized in that, uniform filling nonmagnetic substance in described annular groove, and the nonmagnetic substance of filling does not exceed described annular groove.
7. the superconducting magnet containing ferromagnetic ring as claimed in claim 1, it is characterized in that, the outward flange of described annular cover plate is offered at least two axially extending bores, after screw rod being each passed through an axially extending bore on the described annular cover plate being positioned at described non magnetic cylindrical skeleton two ends, lock described screw rod, described annular cover plate to be fixed on the two ends of described non magnetic cylindrical skeleton.
8. the superconducting magnet containing ferromagnetic ring as claimed in claim 7, it is characterized in that, the inward flange of described annular cover plate is offered at least two axially extending bores, screw is screwed in described non magnetic cylindrical skeleton, to be fixed on described non magnetic cylindrical skeleton by described annular cover plate through the axially extending bore on inward flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510952835.1A CN105355358B (en) | 2015-12-17 | 2015-12-17 | Superconducting magnet comprising ferromagnetic rings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510952835.1A CN105355358B (en) | 2015-12-17 | 2015-12-17 | Superconducting magnet comprising ferromagnetic rings |
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| CN105355358A true CN105355358A (en) | 2016-02-24 |
| CN105355358B CN105355358B (en) | 2017-05-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114496460A (en) * | 2022-03-18 | 2022-05-13 | 北京交通大学 | Magnetic shunt ring and superconducting transformer comprising same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912445A (en) * | 1988-01-22 | 1990-03-27 | Mitsubishi Denki Kabushiki Kaisha | Electromagnet with a magnetic shield |
| US5250901A (en) * | 1991-11-07 | 1993-10-05 | The Regents Of The University Of California | Open architecture iron core electromagnet for MRI using superconductive winding |
| CN1588581A (en) * | 2004-09-28 | 2005-03-02 | 东南大学 | High temperature superconductive energy storage coil end radial magnetic field leading device and its method |
| DE102012106211A1 (en) * | 2012-07-11 | 2014-01-16 | Karlsruher Institut für Technologie | Superconducting magnet arrangement |
| CN103675734A (en) * | 2012-09-05 | 2014-03-26 | 通用电气公司 | Warm bore cylinder assembly |
-
2015
- 2015-12-17 CN CN201510952835.1A patent/CN105355358B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912445A (en) * | 1988-01-22 | 1990-03-27 | Mitsubishi Denki Kabushiki Kaisha | Electromagnet with a magnetic shield |
| US5250901A (en) * | 1991-11-07 | 1993-10-05 | The Regents Of The University Of California | Open architecture iron core electromagnet for MRI using superconductive winding |
| CN1588581A (en) * | 2004-09-28 | 2005-03-02 | 东南大学 | High temperature superconductive energy storage coil end radial magnetic field leading device and its method |
| DE102012106211A1 (en) * | 2012-07-11 | 2014-01-16 | Karlsruher Institut für Technologie | Superconducting magnet arrangement |
| CN103675734A (en) * | 2012-09-05 | 2014-03-26 | 通用电气公司 | Warm bore cylinder assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114496460A (en) * | 2022-03-18 | 2022-05-13 | 北京交通大学 | Magnetic shunt ring and superconducting transformer comprising same |
| CN114496460B (en) * | 2022-03-18 | 2022-12-23 | 北京交通大学 | Shunt ring and superconducting transformer comprising same |
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| Publication number | Publication date |
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| CN105355358B (en) | 2017-05-10 |
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