CN104251980A - Superconducting magnet suspension system - Google Patents
Superconducting magnet suspension system Download PDFInfo
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- CN104251980A CN104251980A CN201310258333.XA CN201310258333A CN104251980A CN 104251980 A CN104251980 A CN 104251980A CN 201310258333 A CN201310258333 A CN 201310258333A CN 104251980 A CN104251980 A CN 104251980A
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- hanger bar
- superconducting magnet
- blade
- sleeve
- fixed
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Abstract
The invention relates to a superconducting magnet suspension system. The superconducting magnet suspension system comprises a superconducting magnet sleeve in which a superconducting magnet is accommodated, multiple blades which are distributed at periphery of the side surface of the superconducting magnet sleeve in a mode of being perpendicular to the side surface of the superconducting magnet sleeve, a vacuum sleeve in which the superconducting magnet sleeve is accommodated, and multiple sets of suspension rods, each set of suspension rods comprises a first suspension rod and a second suspension rod, one ends of the first suspension rod and the second suspension rod in each set are fixed at one of the multiple blades, and the other ends are respectively fixed at the side wall of the vacuum sleeve. Through the superconducting magnet suspension system, under the condition of no special-purpose axial suspension, rigidity for limiting three dimensional translation and three dimensional rotation can be further provided, and cost is reduced.
Description
Technical field
The present invention relates to magnetic resonance imaging (MRI) technical field, relate to the superconducting magnet suspension for magnetic resonance equipment particularly.
Background technology
Superconducting magnet has been widely used in magnetic resonance equipment at present.The coil made with superconductor is producing powerful magnetic field by during powerful electric current, and after impressed current cuts off, the electric current in superconducting coil still remains unchanged, and thus cryogenic magnetic field is very stable.
At work, the even very small vibrations in magnetic resonance equipment also may cause the motion of superconducting magnet, thus produce vortex flow, and upset magnetic field's regularity, this can cause the motion blur phenomenon in magnetic resonance imaging.Usually, this problem avoided by the suspender by designing superconducting magnet dexterously.
Fig. 1 shows the schematic diagram of the superconducting magnet suspender according to prior art.As shown in Figure 1, this suspender comprises 8 radial hanger bar and 4 axial hanger bar.One end of each hanger bar is fixed to the helium bottle of the superconducting magnet that the cooling material for holding such as helium is immersed with cooling, the other end is fixed to the vacuum sleeve (not shown) be enclosed within outside described helium bottle, thus provides the movement limit to superconducting magnet/helium bottle.This radial direction hangs and axially to hang the mode cost combined higher.
Summary of the invention
The invention provides a kind of superconducting magnet suspension not comprising special axis and hang.This superconducting magnet suspension comprises:
Superconducting magnet sleeve, superconducting magnet is accommodated therein by it;
Multiple blade, it is distributed in the periphery of described side surface in the mode of the side surface perpendicular to superconducting magnet sleeve;
Vacuum sleeve, described superconducting magnet sleeve is accommodated therein by it; And
Organize hanger bar more, wherein often organize hanger bar and comprise the first hanger bar and the second hanger bar, one end of the first hanger bar and the second hanger bar of often organizing hanger bar is fixed on in described multiple blade, and the other end is respectively fixed on the sidewall of described vacuum sleeve.
According to one embodiment of present invention, the plane often organizing the blade that the plane that limits of hanger bar and this group hanger bar are fixed to is angled.
According to one embodiment of present invention, described one end of the first hanger bar and the second hanger bar of often organizing hanger bar is fixed on the same position place of a blade in described multiple blade.
According to one embodiment of present invention, described many group hanger bar are fixed to the multiple different leaves in described multiple blade respectively, and wherein said multiple different leaves is symmetrical about the central axis of superconducting magnet sleeve.
According to one embodiment of present invention, the plane often organizing the blade that the plane that limits of hanger bar is fixed to this group hanger bar becomes the angle of 90 degree and vertical with the radial direction of superconducting magnet sleeve.
According to one embodiment of present invention, described many group hanger bar are four groups of hanger bar.
According to one embodiment of present invention, described many group hanger bar are identical with the blade angulation be associated separately, and are symmetric about the central axis of superconducting magnet sleeve.
According to one embodiment of present invention, often organize the first hanger bar of hanger bar and the second hanger bar and blade angulation to be arranged such that the length of each first and second hanger bar after vanes is by temperature variation changes and to minimize.
According to one embodiment of present invention, often organize the first hanger bar of hanger bar and the second hanger bar and blade angulation and be arranged such that described hanger bar of organizing provides and limits the D translation of described superconducting magnet sleeve and the maximum resistance moment of three-dimensional rotation more.
According to one embodiment of present invention, often organize the first hanger bar of hanger bar and the second hanger bar and there is equal length and equal with the blade angulation that they are fixed to.
By superconducting magnet suspension according to an embodiment of the invention, still can provide the restriction D translation of superconducting magnet and the rigidity of three-dimensional rotation when not hanging containing special axis, reducing cost.
Accompanying drawing explanation
In order to more thoroughly understand content of the present disclosure, embodiments of the present invention is described in detail with reference to the following drawings hereinafter, in the accompanying drawings:
Fig. 1 shows the schematic diagram of the superconducting magnet suspender according to prior art;
Fig. 2 A-C shows the schematic perspective view of superconducting magnet suspension according to an embodiment of the invention;
Fig. 3 shows the multi-faceted sectional view of the superconducting magnet suspension shown in Fig. 2 according to an embodiment of the invention; And
Fig. 4 shows the change schematic diagram of hanger bar length according to an embodiment of the invention.
Embodiment
Describe in detail below with reference to the accompanying drawings and be used for realizing specific embodiments of the invention.But should be understood that, the present invention is not limited to following specific embodiment.
Fig. 2 A-C shows the schematic perspective view of superconducting magnet suspension according to an embodiment of the invention.Fig. 3 shows the sectional view of the superconducting magnet suspension in Fig. 2.As shown in Figures 2 and 3, this superconducting magnet suspension comprises the superconducting magnet sleeve 1 superconducting magnet be accommodated therein, multiple blades 2 of the periphery being distributed in this side surface in the mode of the side surface perpendicular to superconducting magnet sleeve 1, hanger bar 3 and the vacuum sleeve 4(that is accommodated therein by superconducting magnet sleeve 1 see not shown in Fig. 3, Fig. 2).
In one embodiment, superconducting magnet sleeve 1 refers to the cooled containers wherein accommodating cooling material and immerse the superconducting magnet in cooling material.Described cooling material such as low temperature helium etc.In another embodiment, superconducting magnet sleeve 1 is the substrate of the inner coil of superconducting magnet or seals the sleeve of described inner coil.Be understandable that, superconducting magnet sleeve 1 can also be the miscellaneous part relevant with superconducting magnet.Although be depicted as by superconducting magnet sleeve 1 in the drawings and be roughly cylindrical, other shapes of such as cylindroid or multiedge cylinder are also applicable to the present invention.
Be dispersed in multiple blades 2 of the side surface periphery of superconducting magnet sleeve 1 radially in one embodiment for having trapezoidal shape.But be appreciated that such as triangle, other fan-shaped, square, circular, oval etc. shapes are also applicable.In the embodiment of fig. 2, this multiple blade 2 is distributed in the periphery of side surface in the mode of the side surface perpendicular to superconducting magnet sleeve 1.
In this embodiment, suspension comprise 4 groups totally 8 hanger bar 3(due to visual angle relation, 4 hanger bar are merely illustrated) in each figure in Fig. 2 A-C, often organize hanger bar and comprise two hanger bar 3, i.e. the first hanger bar and the second hanger bar, wherein one end (also referred to as cold junction) of the first hanger bar and the second hanger bar is fixed on a blade 2, and the other end (also referred to as hot junction) is fixed on the sidewall of vacuum sleeve 1 respectively.In fig. 2, the first hanger bar and the second hanger bar of often organizing hanger bar are shown as the diverse location place that cold junction is fixed on blade, are appreciated that their cold junction also can be fixed on same position place.In addition, will also be appreciated that suspension can comprise more or less hanger bar group, such as, comprise 3 groups of hanger bar or 6 groups of hanger bar etc.
In one embodiment, many group hanger bar are fixed to multiple different leaves of the central axis symmetry about superconducting magnet sleeve respectively.This centerline axis parallel is in the side surface of superconducting magnet sleeve 1.The plane often organizing the blade that the plane that limits of hanger bar and this group hanger bar are fixed to is angled.That is, the plane of the blade that the plane that often group hanger bar limits is fixed to this group hanger bar does not overlap.In one embodiment, the plane of the blade that the plane that often group hanger bar limits is fixed to this group hanger bar becomes the angle of 90 degree, and vertical with the radial direction of superconducting magnet sleeve 1.
In the embodiment of fig. 2, in order to the convenience of project navigator, many group hanger bar are identical with the blade angulation be associated separately, and are symmetric about the central axis of superconducting magnet sleeve.In addition, the first hanger bar of hanger bar and the second hanger bar can also be made often to organize and there is equal length and equal with the blade angulation that they are fixed to.
The plane angulation of the blade that the first hanger bar and the second hanger bar of often organizing hanger bar and this group hanger bar are fixed to can be designed rightly, to make this many group hanger bar provide the D translation of restriction superconducting magnet sleeve and the maximum resistance moment of three-dimensional rotation, thus provide the D translation of restriction superconducting magnet sleeve and the maximum rigidity of three-dimensional rotation.
In addition, because superconducting magnet sleeve 1 comprises or usually close to sub-cooled material, therefore the blade 2 on superconducting magnet sleeve 1 may produce the deformation of such as shrinking due to the applying of this cooling material, thus the position of the cold junction of hanger bar 3 is changed, as shown in Figure 4.The hot junction of hanger bar then can not be subject to the impact of sub-cooled material or be subject to less impact.In this case, after cooling, suspension may be damaged due to inconsistent deformation.In order to reduce or eliminate this damage thus the serviceable life of prolongation suspension, suitably can arrange the first hanger bar and the second hanger bar of often organizing hanger bar and their blade angulations of being fixed to, minimum to make the length of each hanger bar after standing temperature variation change, such as, close to zero.In the diagram, " center of circle " refers to the center of circle in superconducting magnet sleeve cross section, " hanger bar cold junction initial position " refers to the initial position of cold junction on blade that temperature does not change front overhang peg, and " hanger bar cold junction final position " to shrink the position of rear suspension rods cold junction for blade due to low temperature.As shown in Figure 4, when hanger bar is vertical with the shrinkage direction of blade, the length variations that hanger bar produces is minimum.
Like this, by designing rightly and arranging hanger bar, can ensure that the length of hanger bar changes minimum and/or ensures to provide maximum resistance torque.
Fig. 3 shows the sectional view of the superconducting magnet suspension in Fig. 2, wherein the upper left corner is the elevational sectional view of superconducting magnet suspension, be the cross-sectional top view of superconducting magnet suspension below elevational sectional view, elevational sectional view right is the side cross-sectional, view of superconducting magnet suspension.According to the geometric relationship between each parts shown in Fig. 3, can in the hope of the length L of hanger bar 3:
L=R
1{[1/sin(90-Φ)-cos(Φ)]
2/cos
2(θ)+cos
2(90-Φ)}
1/2
Wherein, R
1for the cold junction position of hanger bar 3 is to the distance of the central axis of superconducting magnet sleeve 1, Φ is the blade and the horizontal line angulation that are configured with hanger bar in elevational sectional view, and θ is hanger bar and horizontal line angulation in cross-sectional top view.
By each embodiment of superconducting magnet suspension recited above, the restriction D translation of superconducting magnet and the rigidity of three-dimensional rotation still can be provided when not hanging containing special axis.In addition, by designing the angle of hanger bar and blade rightly, the length that hanger bar can be made to produce due to temperature change changes minimum.According to embodiment illustrated in figure, compared with prior art, the quantity of hanger bar reduces to 8 by 12, thus has saved the cost of about 33%.
Although describe specific embodiments of the invention by reference to the accompanying drawings above-mentioned, those skilled in the art without departing from the spirit and scope of the present invention, can carry out various change, amendment and equivalent substitution to the present invention.These change, amendment and equivalent substitution all mean and fall within spirit and scope that the claim of enclosing limits.
Claims (10)
1. a superconducting magnet suspension, comprising:
Superconducting magnet sleeve, superconducting magnet is accommodated therein by it;
Multiple blade, it is distributed in the periphery of described side surface in the mode of the side surface perpendicular to superconducting magnet sleeve;
Vacuum sleeve, described superconducting magnet sleeve is accommodated therein by it; And
Organize hanger bar more, wherein often organize hanger bar and comprise the first hanger bar and the second hanger bar, one end of the first hanger bar and the second hanger bar of often organizing hanger bar is fixed on in described multiple blade, and the other end is respectively fixed on the sidewall of described vacuum sleeve.
2. superconducting magnet suspension according to claim 1, wherein, the plane often organizing the blade that the plane that limits of hanger bar and this group hanger bar are fixed to is angled.
3. superconducting magnet suspension according to claim 1, wherein, described one end of the first hanger bar and the second hanger bar of often organizing hanger bar is fixed on the same position place of a blade in described multiple blade.
4. superconducting magnet suspension according to claim 1, wherein, described many group hanger bar are fixed to the multiple different leaves in described multiple blade respectively, and wherein said multiple different leaves is symmetrical about the central axis of superconducting magnet sleeve.
5. superconducting magnet suspension according to claim 1, wherein, the plane often organizing the blade that the plane that limits of hanger bar is fixed to this group hanger bar becomes the angle of 90 degree and vertical with the radial direction of superconducting magnet sleeve.
6. the superconducting magnet suspension according to any one of claim 1-5, wherein said many group hanger bar are four groups of hanger bar.
7. the superconducting magnet suspension according to any one of claim 1-5, wherein said many group hanger bar are identical with the blade angulation be associated separately, and are symmetric about the central axis of superconducting magnet sleeve.
8. the superconducting magnet suspension according to any one of claim 1-5, wherein often organizes the first hanger bar of hanger bar and the second hanger bar and blade angulation and is arranged such that the length of each first and second hanger bar after vanes is by temperature variation changes and minimizes.
9. superconducting magnet suspension according to any one of claim 1-5, wherein often organizes the first hanger bar of hanger bar and the second hanger bar and blade angulation and is arranged such that described hanger bar of organizing provides and limits the D translation of described superconducting magnet sleeve and the maximum resistance moment of three-dimensional rotation more.
10. the superconducting magnet suspension according to any one of claim 1-5, wherein often organizes the first hanger bar of hanger bar and the second hanger bar and has equal length and equal with the blade angulation that they are fixed to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310258333.XA CN104251980B (en) | 2013-06-26 | 2013-06-26 | A kind of superconducting magnet suspension |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310258333.XA CN104251980B (en) | 2013-06-26 | 2013-06-26 | A kind of superconducting magnet suspension |
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| CN104251980A true CN104251980A (en) | 2014-12-31 |
| CN104251980B CN104251980B (en) | 2019-03-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139993A (en) * | 2015-09-23 | 2015-12-09 | 奥泰医疗系统有限责任公司 | Suspension device for superconducting magnet |
| CN108447644A (en) * | 2018-05-29 | 2018-08-24 | 潍坊新力超导磁电科技有限公司 | A kind of Magnetic resonance imaging superconducting magnet for acra imaging |
| CN109545497A (en) * | 2019-01-11 | 2019-03-29 | 西南交通大学 | A kind of stairstepping superconducting magnet and the electrodynamics suspension system with it |
| US10415759B2 (en) | 2016-03-18 | 2019-09-17 | Shanghai United Imaging Healthcare Co., Ltd. | Cryostat for superconducting magnet system |
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| US20080180098A1 (en) * | 2007-01-25 | 2008-07-31 | Naoyuki Takei | Magnetic resonance imaging apparatus, magnetic resonance imaging method and program therefor |
| CN201177660Y (en) * | 2008-02-29 | 2009-01-07 | 西门子（中国）有限公司 | Hanging device for superconducting magnet heat shield |
| CN201421757Y (en) * | 2009-03-30 | 2010-03-10 | 天津高能超导技术有限公司 | Improved low-temperature constant-temperature drum |
| CN102148083A (en) * | 2010-02-09 | 2011-08-10 | 通用电气公司 | Superconducting magnet |
| CN103065759A (en) * | 2013-01-24 | 2013-04-24 | 中国科学院电工研究所 | Superconducting magnet supporting and positioning system |
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2013
- 2013-06-26 CN CN201310258333.XA patent/CN104251980B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080180098A1 (en) * | 2007-01-25 | 2008-07-31 | Naoyuki Takei | Magnetic resonance imaging apparatus, magnetic resonance imaging method and program therefor |
| CN201177660Y (en) * | 2008-02-29 | 2009-01-07 | 西门子（中国）有限公司 | Hanging device for superconducting magnet heat shield |
| CN201421757Y (en) * | 2009-03-30 | 2010-03-10 | 天津高能超导技术有限公司 | Improved low-temperature constant-temperature drum |
| CN102148083A (en) * | 2010-02-09 | 2011-08-10 | 通用电气公司 | Superconducting magnet |
| CN103065759A (en) * | 2013-01-24 | 2013-04-24 | 中国科学院电工研究所 | Superconducting magnet supporting and positioning system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139993A (en) * | 2015-09-23 | 2015-12-09 | 奥泰医疗系统有限责任公司 | Suspension device for superconducting magnet |
| CN105139993B (en) * | 2015-09-23 | 2017-08-04 | 奥泰医疗系统有限责任公司 | A kind of suspension apparatus of superconducting magnet |
| US10415759B2 (en) | 2016-03-18 | 2019-09-17 | Shanghai United Imaging Healthcare Co., Ltd. | Cryostat for superconducting magnet system |
| US10962174B2 (en) | 2016-03-18 | 2021-03-30 | Shanghai United Imaging Healthcare Co., Ltd. | Cryostat for superconducting magnet system |
| CN108447644A (en) * | 2018-05-29 | 2018-08-24 | 潍坊新力超导磁电科技有限公司 | A kind of Magnetic resonance imaging superconducting magnet for acra imaging |
| CN108447644B (en) * | 2018-05-29 | 2024-01-26 | 潍坊新力超导磁电科技有限公司 | Nuclear magnetic resonance imaging superconducting magnet for limb end imaging |
| CN109545497A (en) * | 2019-01-11 | 2019-03-29 | 西南交通大学 | A kind of stairstepping superconducting magnet and the electrodynamics suspension system with it |
| CN109545497B (en) * | 2019-01-11 | 2020-07-17 | 西南交通大学 | Stepped superconducting magnet and electric suspension system with same |
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| Publication number | Publication date |
|---|---|
| CN104251980B (en) | 2019-03-08 |
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