CN102290188B - Winding device for shimming superconducting coil and and winding method thereof - Google Patents
Winding device for shimming superconducting coil and and winding method thereof Download PDFInfo
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- CN102290188B CN102290188B CN2011100972527A CN201110097252A CN102290188B CN 102290188 B CN102290188 B CN 102290188B CN 2011100972527 A CN2011100972527 A CN 2011100972527A CN 201110097252 A CN201110097252 A CN 201110097252A CN 102290188 B CN102290188 B CN 102290188B
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Abstract
The invention relates to a winding device for a shimming superconducting coil, which comprises an upper cover plate (1), a lower cover plate (2), a central column (3), a spring (4), a pressure needle (5), a fixing clamp (6), a superconducting wire (8), a screw (9) and a ring (10). The upper cover plate (1) and the lower cover plate (2) are connected through the central column (3), and a clearance with the size identical to the diameter of the wire is left between rectangular teeth of the upper cover plate (1) and the lower cover plate (2). The superconducting wire (8) pressed by the top end of the pressure needle (5) with the spring mechanism (4) slides along the circumference on a horizontal plane to be wound the superconducting coil.
Description
Technical field
The present invention relates to a kind of coiling device and method of superconducting coil, particularly a kind of coiling device and winding method of the superconducting coil for the compensating field uniformity.
Background technology
Compare with the medical imaging device that X-ray, CT Scanner, ultrasonic imaging device etc. are traditional, nulcear magnetic resonance (NMR) (Magnetic Resonance Imaging, MRI) system has that imaging parameters is many, diagnostic message is abundant, image resolution ratio is high, can any direction tomography and without advantages such as ionising radiations, become present state-of-the-art medical imaging devices.Magnet is the core component that is used to provide MRI system background magnetic field.Magnetic field intensity is one of important index of MRI system, and it is directly proportional with signal noise ratio (snr) of image, and the MRI system of high magnetic field intensity can improve signal noise ratio (snr) of image exponentially, shortens imaging time, greatly improves resolution and the definition of image.Uniformity of magnetic field is another important indicator of MRI system, need to be at a required visual field (Field of Vision, FOV) obtain the magnetic field of a high evenness in the scope, general medicine whole body imaging MRI need to be that the ball territory internal magnetic field uniformity of 500mm reaches 10 at the magnetic field center diameter
-6It is that the 5mm ball territory internal magnetic field uniformity is better than 0.01ppm that (1ppm) magnitude, NMR spectrometer then require at diameter.
In theory, optimal design by main magnet, the uniformity can be controlled in the desired scope fully, but owing to inevitably being subject to cold contraction and the impact of the factor such as ferromagnetic material environment on every side under cryogenic conditions of technique for coiling error, magnet skeleton in the main magnet winding process, 2～3 orders of magnitude that can descend than the uniformity of design of the true field uniformity after the main magnet coiling.Magnetic field shimming principle is exactly that magnets magnetic fields fitting of distribution with the space actual measurement becomes one group of orthogonal function (generally selecting spherical-harmonic expansion) component sum that contains constant term, and this constant term is required uniform magnetic field B
0, remaining every inhomogeneous component that affects uniformity of magnetic field that is all, the purpose of shimming is eliminated item by item to these inhomogeneous components exactly, so that the uniformity of magnetic field in DSV (Diameter of Sphere Volume) reaches the requirement of design.
Therefore, after main magnet system coiling well, need to proofread and correct imaging ball territory internal magnetic field.By the coil of design and installation in the magnet outer surface compensating field uniformity, be called shim coil, make the uniformity of magnetic field of magnet reach the requirement of certain precision.Shim coil generally circumferentially is arranged symmetrically with about the magnet center axis on the outer surface edge of cylindrical magnet.
The device that is used at present coiling shimming superconducting coil is comparatively complicated, and whole process operation is loaded down with trivial details, and the coiling time cycle is long, and cost is higher.
Summary of the invention
The objective of the invention is to overcome existing coiling device complexity, the loaded down with trivial details shortcoming of operating process, a kind of device and winding method for coiling shimming superconducting coil is provided.This device volume is little, method is simple, easy to operate, cost is low, the winding process Simple fast.
The coiling device that the present invention is used for the superconducting coil of the compensating field uniformity comprises upper cover plate, lower cover, newel, spring, press pin, stationary fixture, screw, annulus.
The superconducting line that the present invention is used for winding superconducting coil is the low-temperature superconducting line of the niobium copper-titanium composite material of circular section.
Upper cover plate of the present invention and lower cover link together by newel, and the gap of a diameter of wire size is left with rectangular teeth in upper cover plate and lower cover edge between the rectangular teeth of upper cover plate and lower cover.Annulus is enclosed within on the newel, annulus can rotate around newel, and an end of spring connects annulus, the other end Bonding pressure pin of spring, the diameter of press pin is less than the superconducting line diameter, and press pin is slided along periphery on the horizontal plane of the gap location of the rectangular teeth of upper cover plate and lower cover.Pulling force by spring makes the top of press pin apply certain pressure to the superconducting line that twines in the gap, and pressure is not less than 9.8N.Have sliding tray on the stationary fixture, screw is through in the sliding tray, by tightening the screw locking stationary fixture in the sliding tray, the superconducting line that further constraint has wound.Stationary fixture has 4, and 4 stationary fixtures are installed in respectively on the four edges of upper cover plate.
Have sliding tray on the stationary fixture of the present invention, screw is through in the sliding tray, and an end of stationary fixture is withstood superconducting line in the direction perpendicular to superconducting line, then tightens screw stationary fixture is fixed on the upper cover plate, and the superconducting line that has wound is fixed.
Press pin of the present invention and stationary fixture are epoxide resin material, destroy the insulating varnish of superconducting line to prevent contact friction.
Winding method of the present invention is at first will treat to fix in the gap of one of the coiling superconducting line rectangular teeth of introducing upper cover plate and lower cover, then superconducting line is pushed down on the press pin top, press pin and on the horizontal plane in the gap of the rectangular teeth of upper cover plate and lower cover along circumferential slippage.4 stationary fixtures have been installed respectively on the four edges of upper cover plate, when press pin arrives certain stationary fixture, just this stationary fixture have been removed, when press pin is left this stationary fixture, just stationary fixture has been installed.So process is slided round and round with the hand propelled press pin, makes the a-circle-by-a-circle close-packed arrays of superconducting line, when around after the needed number of turn, is coated on the superconducting line with epoxy resin and solidifies formation plane track type superconducting coil.With the bending of plane track type superconducting coil, stick on the outer surface of main magnet with low temperature epoxy resin at last, be formed for the superconducting coil of compensation magnets uniformity of magnetic field.
This coiling device is simple, and method is easy, quick a plurality of bucking coils of coiling, and cost is very cheap.
Description of drawings
Fig. 1 coil winding arrangement schematic diagram is among the figure: 1 upper cover plate; 2 lower covers; 3 newels; 4 springs; 5 press pin; 6 stationary fixtures; 7 sliding trays; 8 superconducting lines; 9 screws; 10 annulus;
Fig. 2 stationary fixture schematic diagram;
Fig. 3 spring pressure structural scheme of mechanism;
Fig. 4 plane track type superconducting coil schematic diagram, 11 plane track type superconducting coils;
Fig. 5 coil sticks on the schematic diagram of main magnet outer surface, among the figure: 12 main magnets; 13 are used for the superconducting coil of the compensating field uniformity.
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, apparatus of the present invention comprise upper cover plate 1, lower cover 2, newel 3, spring 4, press pin 5, stationary fixture 6, screw 9, annulus 10.It is run-track shaped that upper cover plate 1 and lower cover 2 are the plane, upper cover plate 1 and lower cover 2 link together by center 3 posts, one and the equal gap of superconducting line diameter are left with rectangular teeth in upper cover plate 1 and lower cover 2 edges between the rectangular teeth of upper cover plate 1 and lower cover 2.Superconducting line 8 has larger elastic force when crooked, if do not fetter can cause arranging between the superconducting line not tight.Annulus 10 is enclosed within on the newel 3, annulus 10 can rotate around newel 3, one end of spring 4 connects annulus 10, the other end Bonding pressure pin 5 of spring 4, the diameter of press pin 5 is less than superconducting line 8 diameters, and press pin 5 is slided along periphery on the horizontal plane of the gap location of the rectangular teeth of upper cover plate 1 and lower cover 1.Pulling force by spring 4 makes press pin 5 tops be applied with certain pressure to the superconducting line 8 that twines in the gap, and pressure is not less than 1 kgf.By tightening the screw 9 locking stationary fixtures 6 in the sliding tray 7, the superconducting line 8 that further constraint has wound.Stationary fixture 6 has 4, is installed in respectively on the four edges of upper cover plate 1.
As shown in Figure 2, have sliding tray 7 on the stationary fixture 6, screw 9 is through in the sliding tray 7, and an end of stationary fixture 6 is being withstood superconducting line 8 perpendicular to the direction of superconducting line 8, then tighten screw 9 stationary fixture 6 is fixed on the upper cover plate 1, the superconducting line 8 that has wound is fixed.
As shown in Figure 3, on the annulus 10 of one section connection newel 3 of spring 4, other end Bonding pressure pin 5.The diameter of press pin 4 is less than the diameter of superconducting line 8, on the horizontal plane of the gap location of the rectangular teeth of upper cover plate 1 and lower cover 2 along circumferential slippage.Pulling force by spring 4 makes press pin 5 tops to the superconducting line 8 that twines in the gap certain pressure be arranged, and pressure is not less than 9.8N.
As shown in Figure 4, make a-circle-by-a-circle close-packed arrays on the horizontal plane of superconducting line in the rectangular teeth gap, around after the needed number of turn, be coated in curing on the superconducting line 8 with epoxy resin, form the run-track shaped superconducting coil 11 in plane.
As shown in Figure 5, superconducting coil 11 bendings that the plane is run-track shaped stick on the outer surface of main magnet 12 with low temperature epoxy resin, be formed for the superconducting coil 13 of compensation magnets uniformity of magnetic field.
Winding method of the present invention be at first 8 one of superconducting lines are introduced in the gap of rectangular teeth of upper cover plate 1 and lower cover 2 fixing, then press pin 5 tops are pushed down superconducting line 8 and on the horizontal plane in the gap of the rectangular teeth of upper cover plate 1 and lower cover 2 along circumferential slippage.Press pin 5 just removes this stationary fixture 6 when arriving certain stationary fixture 6, just stationary fixture 6 is installed when press pin 5 is left this stationary fixture.So, slide round and round with hand propelled press pin 5, make round and round close-packed arrays of superconducting line 8, when around after the needed number of turn, be coated in curing on the superconducting line 8 with epoxy resin, form plane track type superconducting coil 11.With plane track type superconducting coil 11 bendings, stick on the outer surface of main magnet 12 with epoxy resin at last, be formed for the superconducting coil 13 of compensation magnets uniformity of magnetic field.
This coiling device is simple, and method is easy, quick a plurality of bucking coils of coiling, and cost is very cheap.
Claims (5)
1. the coiling device of a shimming superconducting coil is characterized in that described device comprises upper cover plate (1), lower cover (2), newel (3), spring (4), press pin (5), stationary fixture (6), screw (9) and annulus (10); Upper cover plate (1) and lower cover (2) link together by newel (3), a gap that equates with the diameter of superconducting line (8) is left with rectangular teeth in upper cover plate (1) and lower cover (2) edge between the rectangular teeth of upper cover plate (1) and lower cover (2); Annulus (10) is enclosed within on the newel (3), annulus (10) rotates around newel (3), one end of spring (4) connects annulus (10), the other end Bonding pressure pin (5) of spring (4), the diameter of press pin (5) is less than the diameter of superconducting line (8), and press pin (5) is slided along periphery on the horizontal plane of the rectangular teeth gap location of upper cover plate (1) and lower cover (2); Pulling force by spring (4) makes press pin (5) top exert pressure to the superconducting line (8) that twines in the gap; 4 stationary fixtures (6) are installed in respectively on the four edges of upper cover plate (1).
2. according to the coiling device of shimming superconducting coil claimed in claim 1, it is characterized in that having on the stationary fixture (6) sliding tray (7), screw (9) is through in the sliding tray (7), one end of stationary fixture (6) is being withstood superconducting line (8) perpendicular to the direction of superconducting line (8), then tighten screw (9) stationary fixture (6) is fixed on the upper cover plate (1), the superconducting line (8) that has wound is fixed.
3. according to the coiling device of shimming superconducting coil claimed in claim 1, it is characterized in that superconducting line (8) is the circular section, makes of the niobium copper-titanium composite material.
4. according to the coiling device of shimming superconducting coil claimed in claim 1, it is characterized in that described press pin (5) and stationary fixture (6) are epoxide resin material.
5. right to use requires the method for the winding superconducting coil of 1 described coiling device, it is characterized in that at first (8) one of superconducting lines are introduced in the gap of rectangular teeth of upper cover plate (1) and lower cover (2) and fix, then superconducting line (8) is pushed down on press pin (5) top, press pin (5) is slided along periphery on the horizontal plane in the gap of the rectangular teeth of upper cover plate (1) and lower cover (2); When press pin (5) arrives certain stationary fixture (6), just this stationary fixture (6) is removed, when press pin (5) is left described stationary fixture (6), just described stationary fixture (6) is installed; So, slide round and round with hand propelled press pin (5), make round and round close-packed arrays of superconducting line (8), when around after the needed number of turn, epoxy resin is coated in the upper curing of superconducting line (8), form plane track type superconducting coil (11); With plane track type superconducting coil (11) bending, stick on the outer surface of main magnet (12) with epoxy resin at last, be formed for the superconducting coil (13) of compensation magnets uniformity of magnetic field.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100972527A CN102290188B (en) | 2011-04-19 | 2011-04-19 | Winding device for shimming superconducting coil and and winding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100972527A CN102290188B (en) | 2011-04-19 | 2011-04-19 | Winding device for shimming superconducting coil and and winding method thereof |
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| CN102290188A CN102290188A (en) | 2011-12-21 |
| CN102290188B true CN102290188B (en) | 2013-01-30 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789864B (en) * | 2012-08-16 | 2014-09-03 | 北京云电英纳超导电缆有限公司 | Elastic superconducting magnet skeleton and manufacturing method thereof |
| CN102879753B (en) * | 2012-10-11 | 2015-04-08 | 中国科学院近代物理研究所 | Automatic implementation method for high-uniformity magnet shim coil design |
| CN103117170B (en) * | 2013-02-01 | 2015-04-22 | 中国科学院电工研究所 | Axial forcing device and adjustment method for winding displacement of superconducting coil |
| JP6231039B2 (en) * | 2015-04-22 | 2017-11-15 | 住友重機械工業株式会社 | Cyclotron and superconducting electromagnet |
| CN106772134B (en) * | 2017-03-01 | 2019-05-21 | 中国科学院武汉物理与数学研究所 | A kind of apparatus and method of automatic field compensation |
| CN108922771B (en) * | 2018-07-13 | 2020-06-23 | 西安聚能超导磁体科技有限公司 | Precise winding device and method for large-diameter dipolar coil |
| CN110864615A (en) * | 2019-10-30 | 2020-03-06 | 西北工业大学 | Manufacturing method and application of high-temperature-resistant eddy current type micro displacement sensor |
| US11675036B2 (en) | 2021-03-17 | 2023-06-13 | Shanghai United Imaging Healthcare Co., Ltd. | Shimming device for a magnetic resonance imaging system |
| CN114360891B (en) * | 2021-12-07 | 2024-04-16 | 康威通信技术股份有限公司 | Winding tool and method for wireless charging coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002222726A (en) * | 2001-01-24 | 2002-08-09 | Kyosan Denki Co Ltd | Winding machine |
| KR100725545B1 (en) * | 2005-12-30 | 2007-06-08 | 학교법인 한국산업기술대학 | Continuous disk winding for high voltage superconducting transformer |
| CN201112129Y (en) * | 2007-09-20 | 2008-09-10 | 中国电子科技集团公司第二研究所 | Winding mould of full-automatic winding machine |
| US20090261194A1 (en) * | 2008-04-16 | 2009-10-22 | Nittoku Engineering Co., Ltd. | Winding apparatus and winding method |
| JP5155732B2 (en) * | 2008-05-15 | 2013-03-06 | 株式会社日立産機システム | Multi-stage coil for transformer, and winding method and apparatus for manufacturing the same |
| CN101552137B (en) * | 2008-12-16 | 2011-06-08 | 芜湖市金牛变压器制造有限公司 | Winding machine and winding method |
| CN201638679U (en) * | 2009-11-06 | 2010-11-17 | 天津市永恒电机厂 | Expanding mould for winding coils |
| CN201622934U (en) * | 2010-02-03 | 2010-11-03 | 无锡亚太新技术有限公司 | Cake-typed power filtering reactor wound die |
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