CN104251980B - A kind of superconducting magnet suspension - Google Patents
A kind of superconducting magnet suspension Download PDFInfo
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- CN104251980B CN104251980B CN201310258333.XA CN201310258333A CN104251980B CN 104251980 B CN104251980 B CN 104251980B CN 201310258333 A CN201310258333 A CN 201310258333A CN 104251980 B CN104251980 B CN 104251980B
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- hanger bar
- superconducting magnet
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- sleeve
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Abstract
The present invention relates to a kind of superconducting magnet suspension comprising: superconducting magnet is accommodated therein by superconducting magnet sleeve；Multiple blades are distributed in the periphery of the side surface in a manner of perpendicular to the side surface of superconducting magnet sleeve；The superconducting magnet sleeve is accommodated therein by vacuum sleeve；And multiple groups hanger bar, wherein every group of hanger bar includes the first hanger bar and the second hanger bar, first hanger bar of every group of hanger bar and one end of the second hanger bar are fixed on one in the multiple blade, and the other end is respectively fixed on the side wall of the vacuum sleeve.By the superconducting magnet suspension of embodiment according to the present invention, the D translation of limitation superconducting magnet and the rigidity of three-dimensional rotation still can be provided without containing dedicated axial suspension, reduced costs.
Description
Technical field
The present invention relates to magnetic resonance imaging (MRI) technical fields, more particularly to the superconducting magnet for magnetic resonance equipment
Suspension.
Background technique
Superconducting magnet has been widely used in magnetic resonance equipment at present.The coil made of superconductor is by powerful
Powerful magnetic field is generated when electric current, and after impressed current cutting, the electric current in superconducting coil still remains unchanged, thus superconducting magnetic
Field is sufficiently stable.
At work, the even very small vibration in magnetic resonance equipment may also lead to the movement of superconducting magnet, thus
Eddy current is generated, upsets magnetic field's regularity, this can cause the motion blur phenomenon in magnetic resonance imaging.Generally, by dexterously
The suspension arrangement of superconducting magnet is designed to avoid the problem.
Fig. 1 shows the schematic diagram of superconducting magnet suspension arrangement according to prior art.As shown in Figure 1, the suspension arrangement
Including 8 radial hanger bars and 4 axial hanger bars.One end of each hanger bar is fixed to the cooled material for accommodating such as helium
Matter is with the helium bottle of the cooling superconducting magnet being immersed, and the other end is fixed to the vacuum sleeve covered except the helium bottle (in figure
It is not shown), the movement of superconducting magnet/helium bottle is limited to provide.This radial direction hangs and axially hangs the mode combined
Higher cost.
Summary of the invention
The present invention provides a kind of not comprising the dedicated superconducting magnet suspension axially hung.Superconducting magnet suspension system
System includes:
Superconducting magnet sleeve, superconducting magnet is accommodated therein；
Multiple blades are distributed in the periphery of the side surface in a manner of perpendicular to the side surface of superconducting magnet sleeve；
The superconducting magnet sleeve is accommodated therein by vacuum sleeve；And
Multiple groups hanger bar, wherein every group of hanger bar includes the first hanger bar and the second hanger bar, the first of every group of hanger bar
One end of hanger bar and the second hanger bar is fixed on one in the multiple blade, and the other end is respectively fixed to institute
It states on the side wall of vacuum sleeve.
According to one embodiment of present invention, the leaf that plane defined by every group of hanger bar and this group of hanger bar are fixed to
The plane of piece is angled.
According to one embodiment of present invention, one end quilt of the first hanger bar of every group of hanger bar and the second hanger bar
It is fixed at the same position of a blade in the multiple blade.
According to one embodiment of present invention, the multiple groups hanger bar is fixed to multiple in the multiple blade respectively
Different leaves, wherein the multiple different leaves are symmetrical about the central axis of superconducting magnet sleeve.
According to one embodiment of present invention, the leaf that plane defined by every group of hanger bar and this group of hanger bar are fixed to
The plane of piece is at 90 degree of angle and vertical with the radial direction of superconducting magnet sleeve.
According to one embodiment of present invention, the multiple groups hanger bar is four groups of hanger bars.
According to one embodiment of present invention, the multiple groups hanger bar and respective associated blade angulation phase
Together, and the central axis about superconducting magnet sleeve is symmetric.
According to one embodiment of present invention, formed by the first hanger bar of every group of hanger bar and the second hanger bar and blade
Angle is arranged such that the length of each first and second hanger bar after by temperature change in vanes changes and minimizes.
According to one embodiment of present invention, formed by the first hanger bar of every group of hanger bar and the second hanger bar and blade
Angle is arranged such that the multiple groups hanger bar provides the D translation and three-dimensional rotation for limiting the superconducting magnet sleeve
Maximum resistance torque.
According to one embodiment of present invention, the first hanger bar of every group of hanger bar and the second hanger bar have equal length
It spends and equal with the blade angulation that they are fixed to.
By the superconducting magnet suspension of embodiment according to the present invention, without containing dedicated axial the case where hanging
Under still can provide limitation superconducting magnet D translation and three-dimensional rotation rigidity, reduce costs.
Detailed description of the invention
In order to thoroughly understand content of this disclosure, the embodiment of the present invention is carried out hereinafter with reference to the following drawings
Detailed description, in the accompanying drawings:
Fig. 1 shows the schematic diagram of superconducting magnet suspension arrangement according to prior art；
Fig. 2A-C shows the stereoscopic schematic diagram of superconducting magnet suspension according to an embodiment of the invention；
Fig. 3 show it is according to an embodiment of the invention Fig. 2 shows multi-faceted section of superconducting magnet suspension
Face figure；And
Fig. 4 shows the variation schematic diagram of suspension pole length according to an embodiment of the invention.
Specific embodiment
It is described in detail below with reference to the accompanying drawings for realizing specific embodiments of the present invention.But it is to be understood that this
Invention is not limited to following specific embodiments.
Fig. 2A-C shows the stereoscopic schematic diagram of superconducting magnet suspension according to an embodiment of the invention.Fig. 3
Show the sectional view of the superconducting magnet suspension in Fig. 2.As shown in Figures 2 and 3, which includes that will surpass
Superconducting magnet sleeve 1 that magnetizer is accommodated therein is distributed in the side in a manner of perpendicular to the side surface of superconducting magnet sleeve 1
Multiple blades 2, hanger bar 3 and the vacuum sleeve 4(for being accommodated therein superconducting magnet sleeve 1 of the periphery on surface are referring to figure
It is not shown in 3, Fig. 2).
In one embodiment, superconducting magnet sleeve 1 is referred to wherein accommodating cooling material and be immersed in cooling material
Superconducting magnet cooling container.Described cooling material low temperature helium etc..In another embodiment, superconducting magnet sleeve 1 is
The substrate of the inner coil of superconducting magnet or the sleeve of the sealing inner coil.It is understood that superconducting magnet sleeve 1 is also
It can be other component related with superconducting magnet.Although superconducting magnet sleeve 1 is shown as in figure it is generally cylindrical,
The other shapes of such as cylindroid or multiedge cylinder are also applied for the present invention.
The multiple blades 2 for being radially dispersed in the side surface periphery of superconducting magnet sleeve 1 are in one embodiment tool
There is trapezoidal shape.It is to be understood that the other shapes of triangle, sector, rectangular, round, oval etc. are also applicable
's.In the embodiment of fig. 2, this multiple blade 2 is distributed in side surface in a manner of perpendicular to the side surface of superconducting magnet sleeve 1
Periphery.
In this embodiment, suspension include 4 groups totally 8 hanger bar 3(it is every in Fig. 2A-C due to visual angle relationship
4 hanger bars are merely illustrated in a figure), every group of hanger bar includes two hanger bars 3, i.e. the first hanger bar and the second hanger bar,
Wherein one end (also referred to as cold end) of the first hanger bar and the second hanger bar is fixed on a blade 2, and the other end is (also referred to as warm
End) it is fixed on the side wall of vacuum sleeve 1 respectively.In Fig. 2, the first hanger bar and the second hanger bar quilt of every group of hanger bar
It is shown as cold end to be fixed at the different location of blade, it will be understood that their cold end can also be fixed at same position.Separately
Outside, it will also be appreciated that suspension may include more or fewer hanger bar groups, for example including 3 groups of hanger bars or 6 groups
Hanger bar etc..
In one embodiment, multiple groups hanger bar is fixed to symmetrical about the central axis of superconducting magnet sleeve respectively
Multiple and different blades.The centerline axis parallel is in the side surface of superconducting magnet sleeve 1.Plane defined by every group of hanger bar with should
The plane for the blade that group hanger bar is fixed to is angled.That is, plane defined by every group of hanger bar and this group of hanger bar
The plane for the blade being fixed to is not overlapped.In one embodiment, plane defined by every group of hanger bar and this group of hanger bar quilt
The plane for the blade being fixed to is and vertical with the radial direction of superconducting magnet sleeve 1 at 90 degree of angle.
In the embodiment of fig. 2, for the convenience for designing and calculating, multiple groups hanger bar and respective associated blade institute
At angle it is identical, and the central axis about superconducting magnet sleeve is symmetric.Furthermore it is also possible to make every group of hanger bar
The first hanger bar and the second hanger bar there is equal length and equal with the blade angulation that they are fixed to.
The first hanger bar and the second hanger bar that every group of hanger bar can properly be designed are fixed to this group of hanger bar
Blade plane angulation so that this multiple groups hanger bar provide limitation superconducting magnet sleeve D translation and three-dimensional
The maximum resistance torque of rotation, to provide the D translation of limitation superconducting magnet sleeve and the maximum rigidity of three-dimensional rotation.
In addition, since superconducting magnet sleeve 1 generally comprises or close to sub-cooled substance, on superconducting magnet sleeve 1
Blade 2 may due to the cooling material application and generate the deformation such as shunk so that the cold end of hanger bar 3
Position changes, as shown in Figure 4.And the hot end of hanger bar not will receive the influence of sub-cooled substance then or by lesser
It influences.In this case, after cooling, suspension may be damaged due to inconsistent deformation.In order to drop
It is low or eliminate the damage to extend the service life of suspension, it can suitably arrange first hanger bar of every group of hanger bar
The blade angulation being fixed to the second hanger bar with them, so that each hanger bar after being subjected to temperature change
Length change it is minimum, such as close to zero.In Fig. 4, " center of circle " refers to the center of circle in superconducting magnet sleeve section, and " hanger bar is cold
End initial position " refers to that temperature has not been changed initial position of the cold end of front overhang hanging rod on blade, " hanger bar cold end most final position
Set " it is the position that blade shrinks rear suspension rods cold end due to low temperature.As shown in Figure 4, when the shrinkage direction of hanger bar and blade
When vertical, the variation of length caused by hanger bar is minimum.
In this way, by being properly designed and arranged hanger bar, it is ensured that the length of hanger bar changes minimum and/or guarantees
Maximum resistance torque is provided.
Fig. 3 shows the sectional view of the superconducting magnet suspension in Fig. 2, and wherein the upper left corner is superconducting magnet suspension
Elevational sectional view, be the cross-sectional top view of superconducting magnet suspension below elevational sectional view, elevational sectional view right is super
The side cross-sectional, view of magnetizer suspension.Geometrical relationship between each component according to shown in Fig. 3, can be in the hope of hanger bar
3 length L:
L=R1{[1/sin(90-Φ)-cos(Φ)]2/cos2(θ)+cos2(90-Φ)}1/2
Wherein, R1For hanger bar 3 cold end position to superconducting magnet sleeve 1 central axis distance, Φ be face cut
Blade and horizontal line angulation in the figure of face configured with hanger bar, θ be hanger bar in cross-sectional top view and horizontal line at
Angle.
By each embodiment of superconducting magnet suspension recited above, without containing dedicated axial the case where hanging
Under still can provide limitation superconducting magnet D translation and three-dimensional rotation rigidity.In addition, passing through properly design suspension
The angle of bar and blade can make the hanger bar length change minimum of generation due to temperature change.According to illustrated in figure
Embodiment, compared with prior art, the quantity of hanger bar is reduced to 8 by 12, to save 33% or so cost.
Although the above-mentioned attached drawing that has been combined describes specific embodiments of the present invention, those skilled in the art are not taking off
In the case where from the spirit and scope of the present invention, various changes, modification and equivalent substitution can be carried out to the present invention.These change
Become, modification and equivalent substitution all mean and fall within spirit and scope defined by appended claims.
Claims (10)
1. a kind of superconducting magnet suspension, comprising:
Superconducting magnet sleeve, superconducting magnet is accommodated therein；
Multiple blades are distributed in the periphery of the side surface in a manner of perpendicular to the side surface of superconducting magnet sleeve；
The superconducting magnet sleeve is accommodated therein by vacuum sleeve；And
Multiple groups hanger bar, wherein every group of hanger bar includes the first hanger bar and the second hanger bar, the first suspension of every group of hanger bar
One end of bar and the second hanger bar is fixed on one in the multiple blade, and the other end be respectively fixed to it is described true
On the side wall of empty set.
2. superconducting magnet suspension according to claim 1, wherein plane defined by every group of hanger bar and the group are outstanding
The plane for the blade that hanging rod is fixed to is angled.
3. superconducting magnet suspension according to claim 1, wherein the first hanger bar and second of every group of hanger bar is hanged
Described one end of hanging rod is fixed at the same position of a blade in the multiple blade.
4. superconducting magnet suspension according to claim 1, wherein the multiple groups hanger bar is fixed to described respectively
Multiple and different blades in multiple blades, wherein the multiple different leaves are symmetrical about the central axis of superconducting magnet sleeve.
5. superconducting magnet suspension according to claim 1, wherein plane defined by every group of hanger bar and the group are outstanding
The plane for the blade that hanging rod is fixed to is at 90 degree of angle and vertical with the radial direction of superconducting magnet sleeve.
6. superconducting magnet suspension according to any one of claims 1-5, wherein the multiple groups hanger bar is four groups
Hanger bar.
7. superconducting magnet suspension according to any one of claims 1-5, wherein the multiple groups hanger bar and respectively
Associated blade angulation is identical, and the central axis about superconducting magnet sleeve is symmetric.
8. superconducting magnet suspension according to any one of claims 1-5, wherein the first suspension of every group of hanger bar
Bar and the second hanger bar and blade angulation are arranged such that in vanes each first and second after by temperature change
The length of hanger bar, which changes, to be minimized.
9. superconducting magnet suspension described in any one of -5 according to claim 1, wherein the first hanger bar of every group of hanger bar
It is arranged such that the multiple groups hanger bar provides with the second hanger bar and blade angulation and limits the superconducting magnet set
The D translation of cylinder and the maximum resistance torque of three-dimensional rotation.
10. superconducting magnet suspension according to any one of claims 1-5, wherein the first suspension of every group of hanger bar
Bar and the second hanger bar have 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN104251980A CN104251980A (en) | 2014-12-31 |
| CN104251980B true CN104251980B (en) | 2019-03-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107204226B (en) | 2016-03-18 | 2020-06-02 | 上海联影医疗科技有限公司 | Low-temperature container of superconducting magnet |
| 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 |
| CN109545497B (en) * | 2019-01-11 | 2020-07-17 | 西南交通大学 | Stepped superconducting magnet and electric suspension system with same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008178592A (en) * | 2007-01-25 | 2008-08-07 | Ge Medical Systems Global Technology Co Llc | Magnetic resonance imaging device, scanning device, magnetic resonance imaging method, and program therefor |
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2013
- 2013-06-26 CN CN201310258333.XA patent/CN104251980B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN104251980A (en) | 2014-12-31 |
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