CN203103044U - Cryogenic Dewar for superconducting magnet - Google Patents
Cryogenic Dewar for superconducting magnet Download PDFInfo
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- CN203103044U CN203103044U CN 201320106137 CN201320106137U CN203103044U CN 203103044 U CN203103044 U CN 203103044U CN 201320106137 CN201320106137 CN 201320106137 CN 201320106137 U CN201320106137 U CN 201320106137U CN 203103044 U CN203103044 U CN 203103044U
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Abstract
The utility model discloses a cryogenic Dewar for a superconducting magnet. The cryogenic Dewar for the superconducting magnet comprises a hollow annular barrel body, an upper sealing head, a lower sealing head and bearing rods, wherein the upper sealing head and the lower sealing head are connected with the upper end and the lower end of the annular barrel body in a sealing mode respectively to jointly form a vacuum chamber, a plurality of through holes are formed in each sealing end and are used for installing a refrigerator head and a hoisting rod and being penetrated by a signal line, a vacuum gauge tube, a vacuum gauge outfit and a current lead, the bearing rods are used for hoisting or supporting the superconducting magnet in the vacuum chamber, and the number of the bearing rods is more than two. The utility model further discloses a design method of corresponding critical size parameters. By means of the cryogenic Dewar for the superconducting magnet, a large stress can be born under various work conditions, a covering plate is prevented from deformation or damage, and a heat leakage phenomenon is obviously prevented from occurring. Meanwhile, convenient and reasonable design indexes are provided for the design of the Dewar.
Description
Technical field
The utility model belongs to the pressure vessel technology field, more specifically, relates to a kind of superconducting magnet cooled cryostat.
Background technology
The superconducting magnet energy storage is as a kind of novel energy storage mode, can realize fast gaining merit, reactive power compensation, for improving stability of power system, suppress low-frequency oscillation, improving power supply quality good prospects for application is all arranged.But different with conventional energy storage mode is, superconducting magnet can only be operated in the low temperature environment that is lower than liquid nitrogen temperature, but also the state that internal tank need be evacuated that is to say that safe and reliable cryogenic refrigeration and vacuum environment are the essential conditions of superconducting magnet operation.
Proposed in the prior art to adopt Dewar to be used as the cooled containers of superconducting magnet, its type of cooling mainly comprises employing: liquid helium or liquid nitrogen directly soak cooling, adopt refrigeration machine to carry out cooling, or adopt simultaneously and soak cooling and refrigeration machine cooling.For example, CN1811260A discloses a kind of Dewar bottle that is used for, wherein by seasoning cryogenic liquid in the vacuum system of Dewar bottle inside, and with the superconducting magnet immersion wherein, to be implemented in the purposes of preparation superconducting magnet in the cryogenic vacuum environment; And for example, CN101307862A discloses a kind of conduction cooling superconducting magnet dewar of being convenient to load and unload, this Dewar is the circular cylinder of hollow, and in the cold screen of copper that portion is equipped with refrigeration machine and superconducting magnet are installed within it, after extracting Dewar inside out vacuum, just can use refrigeration machine to be cooled off thus via vacuum pumping port.
Consider Dewar when the superconducting magnet cooling device, require highlyer compared with storing liquefied gas at aspects such as sealing, mechanical strengths, therefore be necessary its structure and set-up mode are made further research.In addition, for this type of Dewar that is applicable to superconducting magnet cooling purposes, do not carry out the product research of system as yet at present, especially lack design objective some of them critical size parameter.Such as, the relation between the thickness of relation, end socket and sidewall between cooling chamber major dimension and the superconducting magnet size, the quantity of suspension rod and sectional area and the superconducting magnet weight etc.Correspondingly, need badly in the association area superconducting magnet is made further improvement with the structure of cooled cryostat, and propose feasible critical size parameter designing scheme, so that satisfy the higher instructions for use of this type of cooled cryostat.
The utility model content
Defective or technical need at prior art, the purpose of this utility model is to provide a kind of superconducting magnet cooled cryostat, wherein by its assembly set-up mode and specifications parameter thereof are made adjustment, can under all kinds of operating modes, bear big stress, avoid the distortion or the damage of cover plate, and significantly reduce the generation of leaking thermal phenomenon.
According to an aspect of the present utility model, a kind of superconducting magnet cooled cryostat is provided, this Dewar comprises circular cylinder, upper cover, bottom head and the suspension rod of hollow, it is characterized in that:
Described upper cover is connected with the upper end of circular cylinder by flange, and is equipped with black box on the contact-making surface of between; Also have a plurality of through holes on the upper cover, these through holes are respectively applied for installs refrigeration machine head, suspension rod, and is used for penetrating for holding wire, vacuum gauge, vacuum gauge outfit and current feed;
Described bottom head is connected with the lower end of circular cylinder by flange equally and is equipped with black box on its contact-making surface, or directly combines with the lower end sealing of circular cylinder by welding manner, constitutes vacuum chamber jointly with upper cover, circular cylinder thus;
The quantity of described suspension rod is more than 2, is respectively applied for superconducting magnet is lifted in the vacuum chamber.
According to the utility model, another superconducting magnet cooled cryostat also is provided, this Dewar comprises circular cylinder, upper cover, bottom head and the support bar of hollow, it is characterized in that:
Described upper cover be connected with the upper end of circular cylinder by flange and the contact-making surface of between on black box is equipped with, or directly seal by welding manner and to combine with the upper end of circular cylinder;
Described bottom head is connected with the lower end of circular cylinder by flange and is equipped with black box on its contact-making surface, constitutes vacuum chamber jointly with upper cover, circular cylinder thus; Also have a plurality of through holes on the described bottom head, these through holes are respectively applied for installs refrigeration machine head, support bar, and is used for penetrating for holding wire, vacuum gauge, vacuum gauge outfit and current feed;
The quantity of described support bar is more than 2, is respectively applied for the superconducting magnet support is in the vacuum chamber.
As further preferably, described black box comprise be arranged on bottom head separately with the contact-making surface of cylindrical shell on groove, and be contained in vacuum rubber seal in each groove.
As further preferably, the whole height L of described Dewar is set to and satisfies following formula: L=L
1+ L
2+ λ R, wherein L
1The length of expression refrigeration machine cold head, L
2The height of expression superconducting magnet, R represents the diameter of superconducting magnet, λ gets
As further preferably, the sectional area S of described suspension rod or support bar satisfies following formula:
W wherein
qThe leakage heat of expression suspension rod or support bar, Q represents the refrigerating capacity of refrigeration machine, [σ] is the allowable stress by suspension rod or support bar self, G by the weight of carrying superconducting magnet, η gets
As further preferably, described bottom head, circular cylinder and the bar gone up made by stainless steel material.
As further preferably, the thickness H of described upper cover satisfies following formula: H 〉=2%D, wherein D is the internal diameter of circular cylinder.
As further preferably, be provided with ring-shaped handle near position intermediate on the circular cylinder of described Dewar, so that lifting of Dewar put.
According to the constructed superconducting magnet of the utility model compared with prior art, mainly possess following technological merit with cooled cryostat:
1, makes improvements by set-up mode and specifications parameter thereof its primary clustering, the superconducting magnet cooled cryostat of can obtain compact conformation, being convenient to operate, and be suitable under all kinds of operating modes, bearing big stress, avoid the distortion or the damage of end socket, and significantly reduce the generation of leaking thermal phenomenon;
2, by superconducting magnet is researched and analysed with the stressed and hot property of cooled cryostat, the specifications parameter of the corresponding thickness of determining some critical size assemblies such as circular cylinder internal diameter and thickness, upper cover and suspension rod sectional area etc., and provide important references for the product design of this type of cooled cryostat;
3, can provide and keep low temperature and high vacuum environment preferably according to Dewar of the present utility model, guarantee the normal operation of magnet, be convenient to simultaneously produce in enormous quantities, thereby especially suitable purposes as the superconducting magnet cooling device.
Description of drawings
Fig. 1 a is an end view of using cooled cryostat according to the constructed superconducting magnet of the utility model preferred embodiment, and Fig. 1 b is the vertical view of superconducting magnet shown in Fig. 1 a with cooled cryostat;
Fig. 2 is the cutaway view with the flange of the supporting installation of circular cylinder;
Fig. 3 a is the schematic diagram that is used to show when superconducting magnet adopts the lifting mode, and Fig. 3 b is the schematic diagram that is used to show when superconducting magnet adopts supporting construction;
Fig. 4 a is the stress analysis schematic diagram when being used to show single hanging rod structure, and Fig. 4 b is the stress analysis schematic diagram when being used to show two hanging rod structure;
Fig. 5 is with the upper cover of cooled cryostat and the schematic diagram of a plurality of through holes on it is set according to superconducting magnet of the present utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 1 a is an end view of using cooled cryostat according to the constructed superconducting magnet of the utility model preferred embodiment, and Fig. 1 b is the vertical view of superconducting magnet shown in Fig. 1 a with cooled cryostat.As shown in Fig. 1 a and 1b, the circular cylinder 3, upper cover 4, bottom head 1 and the suspension rod that mainly comprise hollow according to the constructed superconducting magnet of preferred implementation of the utility model with cooled cryostat, wherein upper cover 4 is connected by the upper end of flange with circular cylinder 3, and is equipped with black box on the contact-making surface of between.The installation screw 12 of flange evenly distributes along its circumferencial direction, and makes that by bolt realization is fastening between upper cover 4 and the circular cylinder 3.In order to guarantee air-tightness, also should between upper cover and circular cylinder, be equipped with for example seal of vacuum usefulness rubber seal and so on.
Specifically as shown in Figure 5, also have a plurality of through holes on the upper cover 4, these through holes are respectively applied for installs the refrigeration machine head, suspension rod, and be used for for holding wire, vacuum gauge, vacuum gauge outfit and current feed penetrate, particularly, comprise the through hole 6 that is used to install big refrigeration machine cold head, be used to install a plurality of suspension rod through holes 7 of suspension rod, be used to install a plurality of current feed through holes 8 of superconducting magnet being carried out through-flow current feed, be used to install the holding wire through hole 9 that aviation plug holding wire and so on for example makes the holding wire that external signal links to each other in the Dewar, and the through hole 10 and 11 etc. that is used to install vacuum gauge and vacuum gauge outfit.In addition, can also comprise the through hole 18 that is used to install cold screen and standby blind hole 19 etc.Perforate size/the quantity of these through holes can according to install or the specification/quantity of insertion element is determined.
Bottom head 1 can be connected with the lower end of circular cylinder 3 and be equipped with black box on its contact-making surface equally by flange, constitutes vacuum chambers with upper cover 4, circular cylinder 3 are common thus.Certainly, it also can directly directly combine with the lower end sealing of circular cylinder by welding manner.When last bottom head adopts the flange mode to connect, specifically as shown in Figure 2, D1 is the external diameter of flange, D0 be out screw diameter, D2 is the diameter of rubber seal, D3 is the internal diameter of rubber seal groove, and b is the width of groove, generally gets 4-10mm, h is the degree of depth of groove, generally be taken as 2-6mm, M is the thickness of flange, and D is that the major dimension of vacuum chamber also is the internal diameter of circular cylinder 3.In order to guarantee the tightness of sealing surface, when design, the thickness of the comparable intermediate seal face portion of the outward flange of flange is a little slightly thin, and h1 is intermediate seal face and the outer peripheral thickness difference of flange, generally is taken as 2-10mm.
For with each superconducting magnet for the bearing mode of vacuum chamber, shown the schematic diagram when superconducting magnet adopts lifting mode and supporting construction among Fig. 3 a and the 3b respectively.The design of bearing structure not only will be considered mechanical stability, but also need consider heat transfer problem.When adopting the lifting mode, the design of suspension rod only need be considered the maximal bending moment (bending stress) under side knock and (comprise additional load) under action of gravity the tensile stress of vertical direction; And support bar is a depression bar when adopting supporting way, and the design of depression bar need be considered the stability problem of depression bar.For general elongated depression bar, keep stable critical bearing capacity much smaller than its hot strength (gap more than 10 times can be arranged).Therefore, under identical load, suspension rod can be thinner than support bar.This just means that hoisting structure has littler leakage heat than supporting construction.Can draw as drawing a conclusion according to above analysis: when the weight of superconducting magnet is little (miniature or small-sized superconducting magnet), can adopt supporting construction; For big-and-middle-sized superconducting magnet, adopt hoisting structure more suitable.Dewar structure when adopting supporting construction is similar with the foregoing description, difference only is it is to have a plurality of through holes on the bottom head at this moment, these through holes are respectively applied for installs refrigeration machine head, support bar, and be used for penetrating for holding wire, vacuum gauge, vacuum gauge outfit and current feed etc.Correspondingly, bottom head is connected with the lower end of circular cylinder by flange and is equipped with black box on its contact-making surface, upper cover is tightly connected with the circular cylinder upper end by mode or the direct welding that flange and black box cooperate equally, constitutes vacuum chamber thus jointly.
Stress analysis schematic diagram when Fig. 4 a and 4b have shown single hanging rod structure and two hanging rod structure respectively.As shown in Fig. 4 a, when adopting single hanging rod structure, this moment, superconducting magnet can be subjected to 2 active forces, one is gravity G vertically downward, another one is the shock loading F of horizontal direction, but mainly needs to consider the problem of impact load F, because the easier suspension rod that causes of side knock load ruptures.Under the effect of lateral impact loading F, suspension rod can bear the effect of moment of flexure.Be decided by size, the loading position of the size and the load of bar Deng the maximal bending moment of straight-bar, when crash-stop, transverse load is carried in the lower end of suspension rod.According to the stressed and restraint condition of this kind structure, it is the cantilever beam structure of standard, and maximal bending moment occurs in the place near upper cover plate.For waiting straight-bar, the cross section at maximal bending moment place is the cross section at maximum stress in bend place just.As shown in Fig. 4 b, when adopting two hanging rod structure, superconducting magnet can be subjected to 2 active forces equally, and one is gravity G vertically downward, and another one is the shock loading F of horizontal direction.Adopting the benefit of two hanging rod structures is the compression and the tensile stresses that can change the horizontal bending stress of major part into bar, and can prove when the operating distance of lateral impact loading equals distance between tie rods, lateral impact loading is equivalent to the vertical load of identical size, and suspension rod generally is to adopt stainless steel material, the compression that can bear and tensile stress are big more a lot of than bending stress, so so just can be farthest under the condition that guarantees suspension rod stability, reduce the cross-sectional area of suspension rod, the cross-sectional area that reduces suspension rod leaks heat for the transmission that reduces suspension rod important function.It is identical with two hanging rod structures that 4 suspension rods bear the analysis of lateral impact loading.By above analysis as can be known, the mechanical stability of two hanging rod structures will be far above single hanging rod structure, therefore the utility model preferably the quantity of suspension rod be set to more than 2 for example 2 or 4.When adopting supporting construction, therefore its stress analysis and aforementioned similar is equally applicable to above conclusion.
In order to guarantee that superconducting magnet can provide higher vacuum degree with cooled cryostat, leak heat as small as possible, guarantee necessary mechanical strength simultaneously.The specification of some crucial building blocks is studied equally and is set to it in the utility model, and has correspondingly proposed to relate to superconducting magnet with the design of cooled cryostat critical size parameter/determine method.
At first needing the major dimension of the vacuum chamber determined also is the inside diameter D of circular cylinder, and other sizes shown in Fig. 2 are all relevant therewith.Because the major dimension of vacuum chamber depends primarily on the external diameter of the superconducting magnet of depositing (fastening part that comprises magnet); consider the facility in the large-scale production and the management of product simultaneously; in the utility model according to the external diameter of the superconducting magnet that is lifted; and from the size sequence of the vacuum chamber of GB GB/T6070-2007 defined and supporting flange thereof, choose the corresponding vacuum chamber and the specification of supporting flange thereof; the major dimension that can determine vacuum chamber thus also is the inside diameter D of circular cylinder, can determine the thickness of circular cylinder in addition; the size of accessories such as supporting flange and rubber seal.
Then, can be according to relational expression L=L
1+ L
2+ λ R, the whole height L of calculating and definite Dewar, wherein L
1The length of expression refrigeration machine cold head, L
2The height of expression superconducting magnet, R represents the diameter of superconducting magnet, λ gets
Then, can be according to the specification of superconducting magnet, selection support bar or hanging rod structure are realized the carrying to superconducting magnet; Utilize fixed circular cylinder inside diameter D in addition, the corresponding external diameter of determining upper and lower end socket, the thickness of guaranteeing to be used to install the end socket of suspension rod or support bar simultaneously possesses enough mechanical strengths.Studies show that the thickness of end socket depends primarily on the major dimension of vacuum chamber, the pass between itself and the major dimension is:
Wherein, H represents the thickness of end socket, and D is the major dimension of vacuum chamber, and K is the form factor of end socket, and P represents atmospheric pressure, the allowable stress of [σ] expression seal head material.For circular head, the K value is about 0.3～0.4, and stainless allowable stress is greater than 100Mpa, and atmospheric pressure is 0.1Mpa, therefore in the utility model when adopting stainless steel manufacturing Dewar, preferably the thickness setting with end socket is more than or equal to 2%D.
Analyze based on stress analysis and leakage heat two hanging rod structures, we learn that there is considerable influence in the dimensions of carrier bar (suspension rod or support bar) to leaking heat, simultaneously closely related with its superconducting magnet weight of being carried and himself material, and the specification that draws carrier bar of deriving need satisfy following relational expression simultaneously:
Wherein S represents the sectional area of each suspension rod or support bar, w
qThe leakage heat of expression suspension rod or support bar, Q represents the refrigerating capacity of refrigeration machine, [σ] is the allowable stress by suspension rod or support bar self, G by the weight of carrying superconducting magnet, η gets
More test shows, when adopting when calculating and being identified for carrying the dimensions of bar of superconducting magnet according to above relational expression, can guarantee to avoid the leak generation of heat when bar can not rupture, and the calculating of the carrier bar dimensions when being convenient to the Different Weight magnet, the efficient that has improved design and made.
Below we will be that example further specifies with the cooled cryostat of 100kJ/50kW superconducting magnet.
According to designing requirement, this superconducting magnet is operated in the temperature of 20K, and this moment, cooled cryostat can keep condition of high vacuum degree, and heat takes place to leak as small as possible.At first can be according to the external diameter of the superconducting magnet of being carried, and from the size sequence of the vacuum chamber of GB GB/T6070-2007 defined and supporting flange thereof, choose and determine that corresponding vacuum chamber major dimension also is the inside diameter D of circular cylinder, (mm of unit) specifically as shown in table 1:
| The magnet external diameter | <340 | <430 | <560 | <700 | <900 |
| The nominal that is suitable for is logical | 400 | 500 | 630 | 800 | 1000 |
| Major dimension D | 400 | 501 | 651 | 800 | 1000 |
Table 1
On this basis, the size of accessories such as thickness, supporting flange and rubber seal that also can corresponding definite circular cylinder, for example when major dimension chooses 651, other parameter sizes (mm of unit) specifically as shown in table 2:
Table 2
In addition, the height of Dewar and magnet need be considered the factors such as spacing of length, cold head and the magnet upper end of refrigeration machine cold head vacuum section, the corresponding setting as the table mm of 3(unit):
| The cold head inner length | Cold head and magnet pitch | Magnet length | The lower support bar | Length overall |
| 350 | 200 | 600 | 100 | 1250 |
Table 3
Then, can be according to determined circular cylinder inside diameter D, the corresponding external diameter of determining upper and lower end socket, choose suitable upper cover thickness according to following formula simultaneously:
Wherein, H represents the thickness of end socket, and D is the major dimension of vacuum chamber, and K is the form factor of end socket, and P represents atmospheric pressure, the allowable stress of [σ] expression seal head material.When end socket is made of stainless steel, test shows, its thickness can calculate and determines that wherein D is the internal diameter of circular cylinder according to expression formula H 〉=2%D.
On determining, after the thickness of the external diameter of bottom head and upper cover, also need other several key parameters are designed, comprising the quantity of suspension rod, sectional area size etc.According to above analysis, adopted 4 suspension rods to carry superconducting magnet here, and according to the weight G of lifting superconducting magnet simultaneously in conjunction with expression formula
The sectional area S of corresponding calculating and definite each suspension rod, wherein w
qThe leakage heat of expression suspension rod or support bar, Q represents the refrigerating capacity of refrigeration machine, [σ] is the allowable stress by suspension rod or support bar self, G by the weight of carrying superconducting magnet, η gets
At last, can also set through hole set on the upper cover and installation dimension thereof, (mm of unit) specifically as shown in table 4 according to real needs:
| ? | The installing hole diameter | The sealing surface external diameter | Vacuum section length | Quantity | The installation site |
| AL325 | The 100(through hole) | 165.1(open close | 338 | 1 | Upper cover plate |
| CH210 | The 98(through hole) | 184.2(the plane) | 304.3 | 1 | Upper cover plate |
| |
10～20(through hole) | 30～40(opens close | 200 | 4 | Upper cover plate |
| Holding wire | Little (2 lemo) | Little | Flexible cord | 3 | Upper cover plate |
| Vacuum gauge | Little (agilent) | Little | Short | 1 | Upper cover plate |
| The vacuum gauge outfit | Little | Little | Short | 1 | Upper cover plate |
| The magnet suspension rod | The 20(screw) | 40(opens sealing | 500 or 1000 | 4 | Upper cover plate |
| Cold screen suspension rod | The 10(blind hole) | The 20(pad) | ～50 | 4 | Under the upper cover plate |
| Standby suspension rod | The 10(blind hole) | The 20(pad) | - | 4 | Under the upper cover plate |
| Pump-line | The Agilent unit | The Agilent unit | Do not have | 1～2 | Sidewall |
Table 4
To sum up, as above the dimensions of bottom head, toroidal shell and suspension rod is all definite with the critical size parameter of cooled cryostat for superconducting magnet, and respective settings some other specifications parameter, thus can with a kind ofly be convenient to operate, practical mode finishes the design process of Dewar.
Those skilled in the art will readily understand; the above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. superconducting magnet cooled cryostat, this Dewar comprises circular cylinder, upper cover, bottom head and the suspension rod of hollow, it is characterized in that:
Described upper cover is connected with the upper end of circular cylinder by flange, and is equipped with black box on the contact-making surface of between; Also have a plurality of through holes on the upper cover, these through holes are respectively applied for installs refrigeration machine head, suspension rod, and is used for penetrating for holding wire, vacuum gauge, vacuum gauge outfit and current feed;
Described bottom head is connected with the lower end of circular cylinder by flange equally and is equipped with black box on its contact-making surface, or directly combines with the lower end sealing of circular cylinder by welding manner, constitutes vacuum chamber jointly with upper cover, circular cylinder thus;
The quantity of described suspension rod is more than 2, is respectively applied for superconducting magnet is lifted in the vacuum chamber.
2. superconducting magnet cooled cryostat, this Dewar comprises circular cylinder, upper cover, bottom head and the support bar of hollow, it is characterized in that:
Described upper cover be connected with the upper end of circular cylinder by flange and the contact-making surface of between on black box is equipped with, or directly seal by welding manner and to combine with the upper end of circular cylinder;
Described bottom head is connected with the lower end of circular cylinder by flange and is equipped with black box on its contact-making surface, constitutes vacuum chamber jointly with upper cover, circular cylinder thus; Also have a plurality of through holes on the described bottom head, these through holes are respectively applied for installs refrigeration machine head, support bar, and is used for penetrating for holding wire, vacuum gauge, vacuum gauge outfit and current feed;
The quantity of described support bar is more than 2, is respectively applied for the superconducting magnet support is in the vacuum chamber.
3. superconducting magnet cooled cryostat as claimed in claim 1 or 2 is characterized in that, described black box comprise be arranged on bottom head separately with the contact-making surface of cylindrical shell on groove, and be contained in vacuum rubber seal in each groove.
4. superconducting magnet cooled cryostat as claimed in claim 3 is characterized in that, the whole height L of described Dewar is set to and satisfies following formula: L=L
1+ L
2+ λ R, wherein L
1The length of expression refrigeration machine cold head, L
2The height of expression superconducting magnet, R represents the diameter of superconducting magnet, λ gets
5. superconducting magnet cooled cryostat as claimed in claim 4 is characterized in that, the sectional area S of described suspension rod or support bar satisfies following formula:
W wherein
qThe leakage heat of expression suspension rod or support bar, Q represents the refrigerating capacity of refrigeration machine, [σ] is the allowable stress by suspension rod or support bar self, G by the weight of carrying superconducting magnet, η gets
6. superconducting magnet cooled cryostat as claimed in claim 1 or 2 is characterized in that, described bottom head, circular cylinder and the bar gone up made by stainless steel material.
7. superconducting magnet cooled cryostat as claimed in claim 6 is characterized in that, the thickness H of described upper cover satisfies following formula: H 〉=2%D, wherein D is the internal diameter of circular cylinder.
8. superconducting magnet cooled cryostat as claimed in claim 1 or 2 is characterized in that, is provided with ring-shaped handle near position intermediate on the circular cylinder of described Dewar, so that lifting of Dewar put.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034983A (en) * | 2014-06-19 | 2014-09-10 | 中国科学院电工研究所 | Multi-sample performance test system for high temperature superconducting materials |
| CN104299748A (en) * | 2014-08-12 | 2015-01-21 | 北京航空航天大学 | Dewar system for high-temperature superconducting magnetic suspension energy storage flywheel |
| CN103177841B (en) * | 2013-03-08 | 2015-08-19 | 华中科技大学 | The method for designing of a kind of superconducting magnet cooled cryostat and critical size parameter thereof |
| CN109976415A (en) * | 2017-12-27 | 2019-07-05 | 中国科学院长春光学精密机械与物理研究所 | A kind of temperature range control system of infrared optical system |
-
2013
- 2013-03-08 CN CN 201320106137 patent/CN203103044U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177841B (en) * | 2013-03-08 | 2015-08-19 | 华中科技大学 | The method for designing of a kind of superconducting magnet cooled cryostat and critical size parameter thereof |
| CN104034983A (en) * | 2014-06-19 | 2014-09-10 | 中国科学院电工研究所 | Multi-sample performance test system for high temperature superconducting materials |
| CN104299748A (en) * | 2014-08-12 | 2015-01-21 | 北京航空航天大学 | Dewar system for high-temperature superconducting magnetic suspension energy storage flywheel |
| CN104299748B (en) * | 2014-08-12 | 2016-08-17 | 北京航空航天大学 | A kind of high temperature superconducting magnetic suspension energy accumulation flywheel Dewar system |
| CN109976415A (en) * | 2017-12-27 | 2019-07-05 | 中国科学院长春光学精密机械与物理研究所 | A kind of temperature range control system of infrared optical system |
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Granted publication date: 20130731 Termination date: 20140308 |