CN119934703B - Liquid nitrogen free high temperature superconductive interferometer assembly with low vibration - Google Patents
Liquid nitrogen free high temperature superconductive interferometer assembly with low vibrationInfo
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- CN119934703B CN119934703B CN202411874792.5A CN202411874792A CN119934703B CN 119934703 B CN119934703 B CN 119934703B CN 202411874792 A CN202411874792 A CN 202411874792A CN 119934703 B CN119934703 B CN 119934703B
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Abstract
The invention provides a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly, which comprises an upper frame, a lower frame, a middle frame, a hose, a cold finger and a cold chain, wherein the upper frame is used for installing a compressor of a refrigerator, the lower frame is used for installing a high-temperature superconducting interferometer, the middle frame is used for installing the hose, the cold finger and the cold chain of the refrigerator, the cold chain is used for conveying cold energy generated by the refrigerator to the high-temperature superconducting interferometer, the upper frame, the middle frame and the lower frame are sequentially connected from top to bottom, at least one end of a fixing rod in the upper frame and the middle frame is provided with a vibration isolation pad, at least two interferometer cold screens are arranged inside the lower frame, one interferometer cold screen is sleeved outside the high-temperature superconducting interferometer, and the other interferometer cold screens are sequentially sleeved outside the corresponding interferometer cold screens. The invention can realize high integration and uninterrupted operation of the whole assembly, and effectively isolate the influence of the compressor of the refrigerator and the cold finger vibration of the refrigerator on the detection performance of the superconducting interferometer.
Description
Technical Field
The application relates to the technical field of low-temperature refrigeration equipment, in particular to the technical field of superconducting low-temperature measurement, and in particular relates to a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly.
Background
At present, the low-temperature working environment of the high-temperature superconducting quantum interferometer is provided by liquid nitrogen, a large amount of liquid nitrogen is consumed during the working process, the interferometer cannot work after the liquid nitrogen is exhausted, namely, the component cannot continuously work for a long time, and meanwhile, the vacuum of the Dewar of the high-temperature superconducting quantum interferometer with the structure needs to be maintained regularly, so that the use cost of the component is increased.
Based on this, industry technicians combine the refrigerator with the high temperature superconducting quantum interferometer, it is easy to understand that the refrigerator can guarantee long-time uninterrupted operation of the high temperature superconducting interferometer, but the refrigerator inevitably can produce vibration during operation, specifically, after the superconducting quantum interferometer is integrated with the refrigerator, the vibration of the cold finger of the refrigerator can introduce the error of interferometer in the measuring direction, causes extra noise, and simultaneously reduces the sensitivity of the interferometer, thereby affecting the measuring precision. Meanwhile, the structure and the size of the traditional superconducting quantum interferometer component are large, so that the portable use and application scenes of the component are limited.
Disclosure of Invention
The invention provides a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly, which solves the problem that the existing high-temperature superconducting interferometer assembly cannot work for a long time in a low-temperature working environment and greatly reduces vibration caused after being introduced into a refrigerator.
In order to solve at least one of the above problems in the prior art, embodiments of the present application provide a low vibration liquid nitrogen free high temperature superconducting interferometer assembly.
According to an embodiment of the application, the application provides a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly, which comprises a refrigerator and a superconducting interferometer, and further comprises:
an upper frame for mounting a compressor of the refrigerator;
a lower frame for mounting the high temperature superconducting interferometer;
The middle frame is used for installing a hose, a cold finger and a cold chain of the refrigerator, wherein the cold chain is used for conveying cold energy generated by the refrigerator to the high-temperature superconducting interferometer, and the upper frame, the middle frame and the lower frame are sequentially connected from top to bottom;
The middle frame is internally provided with a cold finger mounting plate, the cold finger mounting plate is connected with the bottom of the middle frame through a cold finger mounting plate supporting rod, and at least one end of the cold finger mounting plate supporting rod is provided with a vibration isolation pad; the cold finger penetrates through the cold finger mounting plate and transmits the cold energy to the high-temperature superconducting interferometer through the cold chain;
At least two interferometer cold screens arranged in the lower frame, one of the interferometer cold screens is sleeved outside the high-temperature superconducting interferometer, and the other interferometer cold screens are sleeved outside the corresponding interferometer cold screens in sequence, and
The cold finger mounting plate is provided with a corrugated pipe between the cold finger mounting plate and the bottom of the middle frame, is sleeved outside the cold chain, and is used for forming a vacuum space with the cold finger mounting plate, the bottom of the middle frame and the lower frame, and reducing vibration of the cold finger to the vacuum space.
In some embodiments of the application, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly further comprises:
and the compressor mounting plate is used for mounting the compressor to the upper supporting plate of the upper frame, and a vibration isolation pad is arranged between the compressor mounting plate and the upper supporting plate of the upper frame.
In some embodiments of the application, the hose passes through the lower support plate of the upper frame, and
The compressor is connected with the cold finger through the hose.
In some embodiments of the application, the cold chain comprises a flexible cold chain and a detachable columnar cold chain;
One end of the flexible cold chain is connected with the cold finger, the other end of the flexible cold chain is connected with one end of the detachable columnar cold chain, and the other end of the detachable columnar cold chain is connected with the high-temperature superconducting interferometer.
In some embodiments of the application, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly further comprises:
the cold platform is arranged at the junction of the flexible cold chain and the detachable columnar cold chain in the lower frame;
And the cold platform supporting rod is arranged between the bottom of the middle frame and the cold platform and used for supporting the cold platform.
In some embodiments of the application, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly further comprises:
and the cold chain cold screen is arranged between the cold finger mounting plate and the cold platform, and is sleeved outside the cold finger and outside the flexible cold chain.
In some embodiments of the application, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly further comprises:
the interferometer mounting table is arranged at the bottom of the detachable columnar cold chain and is used for mounting at least one high-temperature superconducting interferometer and an interferometer cold screen sleeved outside the high-temperature superconducting interferometer.
In some embodiments of the present application, the remaining interferometer cold screens are sequentially sleeved outside the corresponding interferometer cold screens through the cold platforms.
In some embodiments of the application, the bellows is located inside the cold finger mounting plate support bar relative to the mid-frame.
In some embodiments of the application, the bellows and its flange outer diameter are smaller than the diameter of the cold finger mounting plate support rod.
From the above description, the embodiment of the invention provides a low-vibration liquid nitrogen-free high-temperature superconducting interferometer component, which comprises a refrigerator and a high-temperature superconducting interferometer, an upper frame, a lower frame, a middle frame, a hose, a cold finger and a cold chain, wherein the upper frame is used for installing the compressor of the refrigerator, the lower frame is used for installing the high-temperature superconducting interferometer, the middle frame is used for installing the hose, the cold finger and the cold chain of the refrigerator, the cold chain is used for conveying cold energy generated by the refrigerator to the high-temperature superconducting interferometer, the upper frame, the middle frame and the lower frame are sequentially connected from top to bottom, at least one end of a fixing rod in the upper frame and the middle frame is provided with a shock insulation pad, the middle frame is internally provided with a cold finger mounting plate, the cold finger mounting plate is connected with the bottom of the middle frame through a finger mounting plate support rod, at least one end of the cold finger mounting plate support rod is provided with a shock insulation pad, the cold finger passes through the cold finger mounting plate and transmits the cold energy to the high-temperature superconducting interferometer, at least two interferometer cold screens are arranged inside the lower frame, one cold screen is sleeved outside the high-temperature superconducting interferometer, the rest of the cold interferometer is sequentially sleeved outside the cold interferometer, and the cold screen is sequentially sleeved outside the cold interferometer, and is sleeved outside the cold finger mounting plate and the cold interferometer, the cold interferometer is provided with the cold chain, and the vacuum shock insulation device is reduced, and the vacuum shock absorber is formed by the vacuum shock absorber.
The low-vibration liquid nitrogen-free high-temperature superconducting interferometer component is integrated with the refrigerator, high integration level and uninterrupted operation of the whole component can be realized, and in addition, the influence of the compressor of the refrigerator and cold finger vibration of the refrigerator on the detection performance of the high-temperature superconducting interferometer can be effectively isolated through the vibration isolation structure design, so that continuous high-performance detection of the high-temperature superconducting interferometer component is realized.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic cross-sectional view of a low vibration liquid nitrogen free high temperature superconducting interferometer assembly (cross-section on the side) according to an embodiment of the present application.
Fig. 2 is a schematic view of the shape of a vacuum space according to an embodiment of the present application.
FIG. 3 is a schematic view of the appearance of a low vibration liquid nitrogen free high temperature superconducting interferometer assembly according to an embodiment of the present application.
Fig. 4 is an enlarged schematic view of the structure of part B in fig. 1, which is an example of the present application.
FIG. 5 is a schematic cross-sectional view of a removable columnar cold chain assembly according to an embodiment of the present application.
Reference numerals:
1 upper support plate of upper frame I, 2 vibration isolator (matched with compressor mounting plate 3), 3 compressor mounting plate, 4 fixed rod of upper frame I, 4-1 vibration isolator (matched with fixed rod 4), 5 compressor, 6 hose, 7 lower support plate of upper frame I, 8 vibration isolator (matched with fixed rod 9 of middle frame II), 9 fixed rod of middle frame II, 10 cold finger, 11 cold finger mounting plate, 12 vibration isolator (matched with cold finger mounting plate supporting rod 13), 13 cold finger mounting plate supporting rod, 14 corrugated pipe, 15 bottom of frame II (lower support plate of middle frame II), 16 vibration isolator (matched with cold platform supporting rod 19), 17 cold chain cold screen, 18 flexible cold chain, 19 cold platform supporting rod, 20 cold platform, 21 second cold screen, 22 detachable columnar cold chain, 23 interferometer mounting table, 24 superconducting interferometer, 25 first stage cold screen, 26 lower frame III, and upper frame shell
I is an upper frame, II is a middle frame, III is a lower frame, and IV is a vacuum space.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of the present application and in the foregoing figures, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus. Embodiments of the application and features of the embodiments may be combined with each other without conflict. The application will be described in detail below with reference to the drawings in connection with embodiments.
The superconducting quantum interferometer is a magnetic sensitive element, and a core device of equipment in the fields of weak magnetic measurement, mineral detection, medical science and the like is required to work in a low-temperature environment. With the development of material science and material preparation technology, the superconducting quantum interferometer is increased from the working temperature of 4.2K to 77K, so that the requirement on a low-temperature working environment during the working period of the superconducting quantum interferometer is greatly reduced. In the prior art, the above-described cryogenic environment can be provided in two ways, a first employing a cryogen that directly cools the interferometer by delivering liquid nitrogen into proximity with the interferometer, and a second employing a refrigerator that is directly integrated with the interferometer by the refrigerator.
The patent with publication number CN112731513B provides a refrigerator vibration damping structure, and the patent with publication number CN115711359A provides a zero evaporation liquid nitrogen storage tank suitable for pure germanium detection. In both patents, the probe is immersed in liquid nitrogen, in order to reduce the loss of liquid nitrogen, a scheme of cooling the liquid nitrogen container by a refrigerator is adopted to realize continuous operation of components for a long time, but liquid nitrogen still has loss in the use process, and the refrigerator cold head is placed in a vacuum environment, so that the vacuum environment with large size is required to be strictly maintained.
The publication CN117824237a provides a liquid helium Du Wawei perturbing zero-volatilization cooling system, in which a superconducting quantum interferometer is immersed in liquid helium, closed circulation is achieved by using liquid helium cooled by a refrigerator, and although the system spatially isolates the interferometer from the refrigerator, the system only performs vibration isolation design between the cold finger of the refrigerator and a mounting plate, the interferometer is not vibration isolation design, and environmental vibration is still transmitted to the interferometer, thereby affecting detection.
The patent with publication number CN105571190B provides a mechanical vibration isolation liquid helium free consumption cryogenic refrigeration system, the patent with publication number CN109654786B provides a low vibration cooling device adopting a closed cycle refrigerator, and the patent with publication number CN112963498B provides a 10 nm-level liquid helium free cryogenic vibration reduction system. The above patents all adopt the scheme of combining an external circulating liquid helium system with a cryogenic refrigerator to realize cryogenic temperature, and vibration reduction is concentrated on the refrigerator and system level vibration reduction, and there is no mention about vibration reduction design at the core device concerned.
The patent with publication number CN111089436A provides a low-vibration low-temperature magnetic field measuring device based on the cooling of a GM refrigerator, adopts a mode of combining closed liquid helium circulation in a vacuum cavity with a deep low-temperature refrigerator to refrigerate, reduces the influence of the refrigerator on the vibration of a sample rod through space separation, but the sample rod lacks vibration isolation measures.
Based on this, and in order to solve at least one of the above problems in the prior art, embodiments of the present application provide a low vibration liquid nitrogen free high temperature superconducting interferometer assembly. FIG. 1 is a schematic diagram of a low vibration liquid nitrogen free high temperature superconducting interferometer assembly according to an embodiment of the present application. As shown in fig. 1, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly comprising:
a refrigerator and a superconducting interferometer 24;
An upper frame I (shown in fig. 1 by a red dotted frame) for mounting a compressor 5 of the refrigerator;
A lower frame III (shown in FIG. 1 as a blue dashed box) for mounting the high temperature superconducting interferometer 24;
A middle frame II (shown by a green dotted line frame in fig. 1) for installing a hose 6, a cold finger 10 and a cold chain (comprising a flexible cold chain 18 and a detachable columnar cold chain 22) of the refrigerator, wherein the cold chain is used for conveying cold energy generated by the refrigerator to the high-temperature superconducting interferometer 24, and the upper frame I, the middle frame II and the lower frame III are sequentially connected from top to bottom;
preferably, the number of the fixing bars 4 of the upper frame I is 4 to 8, preferably 4, and the preferred material is nonmagnetic austenitic stainless steel or aluminum alloy. The number of the fixing rods 9 of the middle frame II is 4-8, preferably 4, and the preferred material is polyester glass fiber reinforced material.
The cold finger mounting plate 11 is arranged in the middle frame II, the cold finger mounting plate 11 is connected with the bottom 15 of the middle frame II through a cold finger mounting plate supporting rod 13, and at least one end of the cold finger mounting plate supporting rod 13 is provided with a vibration isolation pad, the cold finger 10 passes through the cold finger mounting plate 11 and transmits the cold energy to the high-temperature superconducting interferometer 24 through the cold chain;
Preferably, the number of the cold finger mounting plate support rods 13 is 4-8, preferably 4, and the preferred material is a polyester glass fiber reinforced material.
At least two interferometer cold screens (the number of interferometer cold screens in FIG. 1 is two, a first-stage cold screen 25 and a second-stage cold screen 21) are arranged inside the lower frame III, one interferometer cold screen 25 (i.e. the first-stage cold screen 25) is sleeved outside the installed high-temperature superconducting interferometer 24, the other interferometer cold screens are sequentially sleeved outside the corresponding interferometer cold screens (the second-stage cold screen 21 in FIG. 1 is sleeved outside the first-stage cold screen 25), and
A bellows 14 is disposed between the cold finger mounting plate 11 and the bottom 15 of the middle frame II, and is sleeved outside the cold chain (fig. 1 is a cross-sectional view of a side surface of the low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly, so that the bellows 14 is a circular ring in a top view) and is used for airtight connection with the cold finger mounting plate 11, the bottom 15 of the middle frame and the lower frame III to form a vacuum space IV (as shown by a purple dotted line frame in fig. 1, it should be pointed out that a space is reserved between the purple dotted line frame and an adjacent wall surface for the sake of convenience of distinguishing and clarity of the drawing, but in reality, the vacuum space is bounded by the wall surface, and in addition, the overall shape of the purple dotted line frame is referred to as fig. 2), and vibration of the cold finger 10 to the vacuum space IV is reduced.
With continued reference to FIG. 1, in some embodiments of the application, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly further comprises:
A compressor mounting plate 3 for mounting the compressor 5 to the upper support plate 1 of the upper frame I, and a vibration isolator 2 is provided between the compressor mounting plate 3and the upper support plate 1 of the upper frame I. So that the compressor mounting plate 3 is mounted to the upper support plate 1 of the upper frame I through the vibration isolator 2. In addition, the number of the vibration isolation pads 2 is 4-8, preferably 4, and the vibration isolation pads 2 are uniformly distributed on the compressor mounting plate 3, and the preferred material of the vibration isolation pads 2 is silicone.
Further, only the upper ends of the fixing bars 4 are connected to the upper support plate 1 through the vibration insulators 4-1, i.e., the number of the vibration insulators 4-1 is identical to that of the fixing bars 4, preferably 4.
Vibration isolating pads 8 are respectively arranged at two ends of the fixed rods 9 of the middle frame II, namely, the number of the vibration isolating pads 8 is twice that of the fixed rods 9, and the vibration isolating pads 8 are preferably made of Butadiene Rubber (BR). And
Vibration isolation pads 12 are respectively arranged at two ends of the cold finger mounting plate supporting rods 13, namely the number of the vibration isolation pads 12 is twice that of the cold finger mounting plate supporting rods 13, and the vibration isolation pads 12 are preferably made of Butadiene Rubber (BR).
With continued reference to fig. 1, in some embodiments of the application, the hose 6 passes through the lower support plate 7 of the upper frame I, and the compressor 5 is connected to the cold finger 10 through the hose 6. I.e. the lower support plate 7 of the upper frame I is provided with through holes for the hoses 6 to pass through.
With continued reference to FIG. 1, in some embodiments of the application, the cold chain includes a flexible cold chain 18 and a detachable columnar cold chain 22, the material comprising the flexible cold chain 18 is preferably oxygen free copper or high purity aluminum.
One end of the flexible cold chain 18 is connected to the cold finger 10, the other end is connected to one end of the detachable columnar cold chain 22, and the other end of the detachable columnar cold chain 22 is connected to the high-temperature superconducting interferometer 24.
With continued reference to FIG. 1, in some embodiments of the application, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly further comprises:
A cold plate 20 disposed at the interface of the flexible cold chain 18 and the detachable columnar cold chain 22 in the lower frame III;
a cold platform support bar 19 disposed between the bottom 15 of the middle frame II (i.e., the lower support plate of the middle frame II) and the cold platform 20 for supporting the cold platform 20.
Further, a vibration isolation pad 16 is disposed between the cold platform support bar 19 and the bottom 15 of the middle frame II, and the vibration isolation pad 16 is made of silicone.
With continued reference to FIG. 1, in some embodiments of the application, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly further comprises:
and a cold chain cold screen 17, which is arranged between the cold finger mounting plate 11 and the cold platform 20, and is sleeved outside the cold finger 10 and outside the flexible cold chain 18. That is, the flexible cold chain 18 is installed in the cold chain cold screen 17, and both ends of the flexible cold chain 18 are connected to the cold finger 10 and the cold platform 20, respectively.
It will be appreciated that the cold chain cold screen 17 is arranged in a manner that requires a through hole in the bottom 15 of the middle frame II, and the outer diameter of the cold chain cold screen 17 is smaller than the radius of the through hole.
With continued reference to FIG. 1, in some embodiments of the application, a low vibration liquid nitrogen free high temperature superconducting interferometer assembly further comprises:
the interferometer mounting table 23 is disposed at the bottom of the detachable columnar cold chain 22, and is used for mounting at least one high-temperature superconducting interferometer 24, and an interferometer cold screen 25 (i.e. a primary cold screen 25) sleeved outside the high-temperature superconducting interferometer 24.
On the basis of the above embodiment, the rest of interferometer cold screens are sequentially sleeved outside the corresponding interferometer cold screens through the cold platforms (taking fig. 1 as an example, the number of interferometer cold screens is two, and the second-stage cold screen 21 is sleeved outside the first-stage cold screen 25).
Specifically, the secondary cold screen 21 is mounted on the periphery of the cold platform 20, enveloping the removable columnar cold chain 22 and the components mounted thereon. The detachable columnar cold chain 22 can be detached according to the use condition, and the interferometer mounting table 23 fixed with the high-temperature superconducting interferometer 24 and the primary cold screen 25 can be directly mounted on the cold platform 20.
With continued reference to fig. 1, in some embodiments of the application, the bellows 14 is located inside the cold finger mounting plate support bar 13 relative to the mid-frame II.
In some embodiments of the present application, the bellows 14 and its flange outer diameter are smaller than the diameter (mounting dimension diameter) of the cold finger mounting plate support bar 13. The upper and lower ends of the bellows 14 are respectively connected with the cold finger mounting plate 11 and the bottom 15 of the middle frame II.
From the above description, the embodiment of the invention provides a low-vibration liquid nitrogen-free high-temperature superconducting interferometer component, which comprises a refrigerator and a high-temperature superconducting interferometer, an upper frame, a lower frame, a middle frame, a hose, a cold finger and a cold chain, wherein the upper frame is used for installing the compressor of the refrigerator, the lower frame is used for installing the high-temperature superconducting interferometer, the middle frame is used for installing the hose, the cold finger and the cold chain of the refrigerator, the cold chain is used for conveying cold energy generated by the refrigerator to the high-temperature superconducting interferometer, the upper frame, the middle frame and the lower frame are sequentially connected from top to bottom, at least one end of a fixing rod in the upper frame and the middle frame is provided with a shock insulation pad, the middle frame is internally provided with a cold finger mounting plate, the cold finger mounting plate is connected with the bottom of the middle frame through a finger mounting plate support rod, at least one end of the cold finger mounting plate support rod is provided with a shock insulation pad, the cold finger passes through the cold finger mounting plate and transmits the cold energy to the high-temperature superconducting interferometer, at least two interferometer cold screens are arranged inside the lower frame, one cold screen is sleeved outside the high-temperature superconducting interferometer, the rest of the cold interferometer is sequentially sleeved outside the cold interferometer, and the cold screen is sequentially sleeved outside the cold interferometer, and is sleeved outside the cold finger mounting plate and the cold interferometer, the cold interferometer is provided with the cold chain, and the vacuum shock insulation device is reduced, and the vacuum shock absorber is formed by the vacuum shock absorber.
The low-vibration liquid nitrogen-free high-temperature superconducting interferometer component provided by the invention firstly does not need liquid nitrogen when in operation, and can realize long-time uninterrupted operation of the interferometer by providing cold energy for the high-temperature superconducting interferometer through the refrigerator, and the component has smaller size and higher applicability, and finally, the component can realize low vibration of the component through a mechanical vibration isolation structure, thereby realizing high-sensitivity detection of the interferometer.
To further illustrate the solution, the invention also provides a specific application example of the low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly.
As shown in figures 1 and 3, the low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly comprises an upper support plate 1 of an upper frame I, a vibration isolator 2 (matched with a compressor mounting plate 3), a compressor mounting plate 3, a fixing rod 4 of the upper frame I, a vibration isolator 4-1 (matched with the fixing rod 4), a compressor 5, a hose 6, a lower support plate 7 of the upper frame I, a vibration isolator 8 (matched with a fixing rod 9 of a middle frame II), a fixing rod 9 of the middle frame II, a cold finger 10, a cold finger mounting plate 11, a vibration isolator 12 (matched with a cold finger mounting plate support rod 13), a cold finger mounting plate support rod 13, a corrugated pipe 14, a bottom 15 of the middle frame II (a lower support plate of the middle frame II), a vibration isolator 16 (matched with a cold platform support rod 19), a cold chain cold screen 17, a flexible cold chain 18, a cold platform support rod 19, a cold platform 20, a secondary cold screen 21, a detachable columnar cold chain 22, an interferometer mounting table 23, a cold superconducting interferometer 24, a primary cold screen 25 and a lower frame III shell 26. Specifically:
The upper support plate 1 is a mounting standard of the low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly, and a high Young modulus material, preferably austenitic stainless steel, is required to be selected. The compressor 5 is fixed on the compressor mounting plate 3, and the compressor mounting plate 3 is vibration-isolated and mounted on the upper support plate 1 through vibration isolation pads 2 uniformly distributed thereon.
In order to achieve effective heat dissipation of the compressor 5 to ensure the refrigerating efficiency of the refrigerator, the compressor mounting plate 3 is preferably made of an aluminum alloy. The vibration transmitted from the compressor 5 to the upper support plate 1 is reduced by using vibration insulators 2, and the number of vibration insulators 2 is 4 to 8, preferably 4, and the preferable material is silicone.
Further, the fixing rod 4 is used to connect the upper support plate 1 with the lower support plate 7, and the vibration isolator 4-1 is installed between the fixing rod 4 and the upper support plate 1 to reduce vibration generated from the compressor 5 transmitted along the fixing rod 4 to the lower support plate 7. The number of the fixing rods 4 is 4-8, preferably 4, and the preferred material is nonmagnetic austenitic stainless steel or aluminum alloy. The number of vibration isolators 4-1 is identical to that of the fixing bars 4, preferably 4, and the preferable material is silicone.
The vibration isolation pads 8 are arranged at the two ends of the fixed rod 9 and are used for connecting the lower support plate 7 with the bottom 15 of the middle frame II in a vibration isolation manner. Vibration conducted by the compressor 5 along the assembly structure is further reduced by the fixing rod 9 and the vibration isolator 8. The number of fixing bars 9 is 4-8, preferably 4, and the preferred material is a polyester glass fiber reinforced material. The number of vibration isolators 8 is twice that of the outer fixing bars 9, and the preferable material is Butadiene Rubber (BR).
The hose 6 passes through a mounting hole in the lower support plate 7 to connect the cold finger 10 with the compressor 5, and the refrigerator may be a pulse tube refrigerator or a Stirling refrigerator. The cold finger 10 is connected with the cold finger mounting plate 11, and the cold finger mounting plate 11 is preferably made of aluminum alloy.
In order to realize the vacuum low-temperature environment required by the operation of the high-temperature superconducting interferometer, the cold finger 10, the cold finger mounting plate 11, the corrugated pipe 14 and the bottom 15 of the middle frame II are in airtight connection with the lower frame III shell 26 to form a vacuum peripheral space.
In order to further realize vibration isolation mounting of the cold finger 10 and the high-temperature superconducting interferometer 24, a corrugated pipe 14 is adopted to be in vibration isolation connection with the cold finger mounting plate 11 and the bottom 15 of the middle frame II, and a vacuum environment is provided for the high-temperature superconducting interferometer 24. A cold finger mounting plate support rod 13 (located inside) and a vibration isolator 12 are mounted between the cold finger mounting plate 11 and the bottom 15 of the middle frame II, and on the outer periphery of the bellows 14. It will be appreciated that these vibration isolation designs effectively reduce the vibration transferred by the cold finger 10 to the bottom 15 of the mid-frame II and the superconducting interferometer 24.
The number of the cold finger mounting plate supporting rods 13 is 4-8, preferably 4, and the preferable material is polyester glass fiber reinforced material. Vibration isolation pads 12 are respectively arranged at two ends of the cold finger mounting plate supporting rods 13, the number of the vibration isolation pads 12 is twice that of the cold finger mounting plate supporting rods 13, and Butadiene Rubber (BR) is preferable.
On the basis of the embodiment, one end of the cold platform supporting rod 19 is installed on the bottom 15 of the middle frame II through the vibration isolation pad 16, and the other end of the cold platform supporting rod 19 is connected to and fixed on the cold platform 20, so that the space separation between the cold platform 20 and the cold finger 10 is realized, and further the influence of vibration generated by shaking of the cold finger 10 on the superconducting interferometer 24 is further reduced.
On the other hand, since the temperature required for the operation of the cooling platform 20 is 77K or less and the temperature of the bottom 15 of the middle frame II is 293K, in order to reduce the loss of cooling capacity and power consumption of the refrigerator, it is preferable that the cooling platform support bar 19 has a thin-wall structure and is made of a glass fiber reinforced composite material having poor heat conduction but good rigidity. The preferred material for vibration isolator 16 is silicone.
The cold chain cold screen 17 is used for reducing radiation heat leakage of the flexible cold chain 18 and the cold finger 10, the bottom 15 of the middle frame II is provided with a through hole, the cold chain cold screen 17 is installed on the cold platform 20 through the through hole, and the outer diameter of the cold chain cold screen 17 is smaller than the radius of the through hole of the bottom 15 of the middle frame II.
The cold energy is transmitted through the flexible cold chain 18, one end of the flexible cold chain 18 is connected with the cold finger 10, and the other end is connected with the cold platform 20, and preferably, the material of the flexible cold chain 18 is oxygen-free copper or high-purity aluminum.
The cold platform 20 is provided with a secondary cold screen 21 and a detachable columnar cold chain 22, the interferometer mounting platform 23 is connected with the detachable columnar cold chain 22, and the interferometer mounting platform 23 is fixedly provided with a high-temperature superconductive interferometer 24 and a primary cold screen 25. The primary cold screen 25 and the secondary cold screen 21 are used for reducing radiation heat leakage of the detachable columnar cold chain 22 and the superconducting interferometer 24. A secondary cold screen 21 is mounted around the periphery of the cold platform 20, enveloping a removable columnar cold chain 22 and components mounted thereon.
Fig. 4 shows the details of fig. 1, and the relative positional relationship and installation manner of the lower support plate 7, the cold platform support vibration isolator 16 and the cold platform support rod 19 of the middle frame II can be more clearly understood.
Fig. 5 shows a cross-sectional structure of the detachable columnar cold chain 22, and it can be seen that the overall structure is similar to that of fig. 1.
From the above description, the embodiment of the invention provides a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly, which comprises a refrigerator and a high-temperature superconducting interferometer, an upper frame, a lower frame, a middle frame, a hose, a cold finger and a cold chain, wherein the upper frame is used for installing the refrigerator, the lower frame is used for installing the high-temperature superconducting interferometer, the cold chain is used for conveying cold generated by the refrigerator to the high-temperature superconducting interferometer, the upper frame, the middle frame and the lower frame are sequentially connected from top to bottom, at least one end of a fixing rod in the upper frame and the middle frame is provided with a shock insulation pad, a cold finger mounting plate is arranged in the middle frame, the cold finger mounting plate is connected with the bottom of the middle frame through a finger mounting plate supporting rod, at least one end of the cold finger mounting plate supporting rod is provided with a shock insulation pad, the cold finger passes through the cold finger mounting plate and transmits the cold energy to the high-temperature superconducting interferometer through the cold chain, at least two interferometer cold screens are arranged in the lower frame, one of the cold screens is sleeved outside the high-temperature superconducting interferometer, the other cold screens are sequentially sleeved outside the cold interferometer, and the cold finger is sleeved outside the cold chain, and the vacuum-free cold interferometer is arranged between the cold finger mounting plate and the cold chain, and the cold finger mounting plate is in vacuum-free vacuum type cold interferometer. Specifically, the invention has the following beneficial effects:
1. The compressor of the refrigerator is arranged on the fixed plate through the vibration isolation pad, so that the vibration conduction from the compressor to the upper supporting plate of the upper frame is reduced, and the vibration conduction from the upper supporting plate of the upper frame to the lower supporting plate of the upper frame is further reduced through the vibration isolation pad and the fixed rod of the upper frame.
2. According to the invention, the fixing rods and the vibration isolating pads of the middle frame are added to the lower support plate of the upper frame and the lower support plate of the middle frame, so that the rigidity of the mechanical structure is ensured, meanwhile, the vibration isolating structure is further added, and the vibration of the compressor conducted to the lower support plate of the upper frame is further reduced, thereby reducing the vibration of the vacuum cavity.
3. The compressor of the refrigerator is connected with the cold finger through a hose, and after the cold finger of the refrigerator is fixed with the cold finger mounting plate, the influence of vibration of the cold finger of the refrigerator on the vacuum cavity is further reduced through the corrugated pipe and the support rod of the cold finger mounting plate and the corresponding vibration isolator.
4. The cold platform and the cold finger of the refrigerator adopt a space isolation design, adopt soft connection to transfer cold energy, reduce the influence of vibration of the cold finger of the refrigerator on a superconducting interferometer arranged on the cold platform, and improve the detection effect.
5. The fixing of this cold platform is realized through cold platform bracing piece, and cold platform bracing piece passes through the vibration isolator and is fixed with the lower bolster of the well frame II through multistage vibration isolation design, has reduced the vibration of introducing cold platform to a great extent, and then has reduced the vibration of high temperature superconducting interferometer.
6. The high-integration installation of the refrigerator system and the vacuum cavity is realized, the refrigerator is used for refrigerating the high-temperature superconducting interferometer, the system volume is reduced, the components can work continuously, and meanwhile, the portable use of the components is realized.
In the description of the present specification, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The description of the terms "one embodiment," "one particular embodiment," "some embodiments," "for example," "an example," "a particular instance," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The order of steps involved in the embodiments is illustrative of the practice of the invention, and is not limited and may be suitably modified as desired.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is merely an example of an embodiment of the present disclosure and is not intended to limit the embodiment of the present disclosure. Various modifications and variations of the illustrative embodiments will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the embodiments of the present specification, should be included in the scope of the claims of the embodiments of the present specification.
Claims (10)
1. The low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly comprises a refrigerator and a high-temperature superconducting interferometer, and is characterized by further comprising:
an upper frame for mounting a compressor of the refrigerator;
a lower frame for mounting the high temperature superconducting interferometer;
The middle frame is used for installing a hose, a cold finger and a cold chain of the refrigerator, wherein the cold chain is used for conveying cold energy generated by the refrigerator to the high-temperature superconducting interferometer, and the upper frame, the middle frame and the lower frame are sequentially connected from top to bottom;
The middle frame is internally provided with a cold finger mounting plate, the cold finger mounting plate is connected with the bottom of the middle frame through a cold finger mounting plate supporting rod, and at least one end of the cold finger mounting plate supporting rod is provided with a vibration isolation pad; the cold finger penetrates through the cold finger mounting plate and transmits the cold energy to the high-temperature superconducting interferometer through the cold chain;
At least two interferometer cold screens arranged in the lower frame, one of the interferometer cold screens is sleeved outside the high-temperature superconducting interferometer, and the other interferometer cold screens are sleeved outside the corresponding interferometer cold screens in sequence, and
The cold finger mounting plate is provided with a corrugated pipe between the cold finger mounting plate and the bottom of the middle frame, is sleeved outside the cold chain, and is used for forming a vacuum space with the cold finger mounting plate, the bottom of the middle frame and the lower frame, and reducing vibration of the cold finger to the vacuum space.
2. The high temperature superconducting interferometer assembly of claim 1, further comprising:
and the compressor mounting plate is used for mounting the compressor to the upper supporting plate of the upper frame, and a vibration isolation pad is arranged between the compressor mounting plate and the upper supporting plate of the upper frame.
3. The high temperature superconductor interferometer assembly of claim 1, wherein the flexible tube passes through a lower support plate of the upper frame, and
The compressor is connected with the cold finger through the hose.
4. The high temperature superconducting interferometer assembly of claim 1, wherein the cold chain comprises a flexible cold chain and a detachable columnar cold chain;
One end of the flexible cold chain is connected with the cold finger, the other end of the flexible cold chain is connected with one end of the detachable columnar cold chain, and the other end of the detachable columnar cold chain is connected with the high-temperature superconducting interferometer.
5. The high temperature superconducting interferometer assembly of claim 4, further comprising:
the cold platform is arranged at the junction of the flexible cold chain and the detachable columnar cold chain in the lower frame;
And the cold platform supporting rod is arranged between the bottom of the middle frame and the cold platform and used for supporting the cold platform.
6. The high temperature superconducting interferometer assembly of claim 5, further comprising:
and the cold chain cold screen is arranged between the cold finger mounting plate and the cold platform, and is sleeved outside the cold finger and outside the flexible cold chain.
7. The high temperature superconducting interferometer assembly of claim 5, further comprising:
the interferometer mounting table is arranged at the bottom of the detachable columnar cold chain and is used for mounting at least one high-temperature superconducting interferometer and an interferometer cold screen sleeved outside the high-temperature superconducting interferometer.
8. The high temperature superconductor interferometer assembly of claim 7, wherein the remaining interferometer cold shields are sequentially nested outside the corresponding interferometer cold shields by the cold stage.
9. The high temperature superconducting interferometer assembly of any of claims 1-8, wherein the bellows is located inside the cold finger mounting plate support bar relative to the mid-frame.
10. The high temperature superconducting interferometer assembly of claim 9, wherein the bellows and its flange outer diameter are smaller than the diameter of the cold finger mounting plate support rod.
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| CN104180552A (en) * | 2014-08-15 | 2014-12-03 | 中国科学院上海技术物理研究所 | U-shaped pulse tube refrigerating machine structure for cooling high temperature superconducting filter and manufacture method |
| CN113074468A (en) * | 2021-04-13 | 2021-07-06 | 中国科学院上海技术物理研究所 | Pulse tube refrigerator system with single piston phase modulation and vibration reduction method thereof |
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| JP4692742B2 (en) * | 2005-06-24 | 2011-06-01 | 富士電機ホールディングス株式会社 | Sample analyzer |
| CN118040431A (en) * | 2022-11-14 | 2024-05-14 | 清华大学 | A microwave signal generating device |
| CN116336694B (en) * | 2023-03-23 | 2025-07-08 | 中国科学院高能物理研究所 | Cryostat for conduction cooling superconducting cavity test and cooling method thereof |
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| CN104180552A (en) * | 2014-08-15 | 2014-12-03 | 中国科学院上海技术物理研究所 | U-shaped pulse tube refrigerating machine structure for cooling high temperature superconducting filter and manufacture method |
| CN113074468A (en) * | 2021-04-13 | 2021-07-06 | 中国科学院上海技术物理研究所 | Pulse tube refrigerator system with single piston phase modulation and vibration reduction method thereof |
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