A high-temperature superconducting magnetic levitation space debris simulation device

Abstract

The application relates to a high-temperature superconducting magnetic levitation space debris simulation device, which comprises a Dewar container and a heat-insulating inner container, the heat-insulating inner container is provided with a partition plate to divide a lower space and an upper space, the lower space is provided with a runway-type high-temperature superconducting magnet structure, the upper space is provided with a cold conduction clamp hand for clamping a high-temperature superconducting sample, the cold conduction clamp hand cools the high-temperature superconducting sample through a first refrigerator connected to the cold conduction clamp hand, the cold conduction clamp hand warms the high-temperature superconducting sample through a heating piece connected to the cold conduction clamp hand, the runway-type superconducting magnet structure is cooled through a second refrigerator connected to the runway-type superconducting magnet structure, the upper space is further provided with a first temperature sensor for detecting the temperature of the high-temperature superconducting sample and a second temperature sensor for detecting the temperature of the runway-type superconducting magnet structure. The high-temperature superconducting magnetic levitation space debris simulation device has a short experimental period, significantly improves experimental efficiency, and reduces experimental difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of space simulation devices, in particular to a high-temperature superconducting magnetic levitation space debris simulation device. BACKGROUND

[0002] With the increase in the number of spacecraft launched into outer space, the number of mechanical debris generated will also increase, and these debris will fly at a speed greater than the first cosmic speed, which will pose a great threat to effective space satellites and space stations during launch and operation. For large mechanical debris, active space vehicles can be used to capture, throw nets, and other methods, but for small debris, such methods are difficult to implement. On the ground, high-energy laser beams can be used to bombard flying space debris, and the surface of the metal debris is instantaneously heated and phase changed to release gas. The release of gas generates a counteracting force, which can effectively change the flight speed and path of the space debris, causing it to gradually lose speed and eventually fall into the atmosphere and burn. This method is relatively low in cost and safe and reliable compared to other methods. In order to study the effect of laser shooting on debris, relevant space environment simulation experiments need to be conducted on the ground.

[0003] Existing simulation experiments are mostly conducted in Dewar containers. The magnets used in the experiments are made of low-temperature superconducting materials, which have a superconducting temperature of about 4K. Therefore, a long cooling time is required to reach the experimental conditions. In addition, the Dewar container used in the experiment has multiple viewing windows for laser shooting and trajectory observation, which makes it generally take 4-5 days to reach the experimental conditions. Adding the warm-up time, the experimental period requires at least one week. The long experimental period is accompanied by high energy consumption and cost. Therefore, in order to promote the application and research of space simulation experiments, it is urgent to improve the experimental efficiency. SUMMARY

[0004] The present application provides a high-temperature superconducting magnetic levitation space debris simulation device to overcome the shortcomings of the prior art. The experimental period is shorter, which significantly improves the experimental efficiency and reduces the experimental difficulty.

[0005] The technical scheme adopted by the present application to solve the above technical problems is as follows:

[0006] A high-temperature superconducting magnetic levitation space debris simulation device, comprising a Dewar container, a heat-insulating inner container is arranged in the Dewar container, a heat-insulating layer is further wrapped outside the heat-insulating inner container, a partition plate is arranged in the heat-insulating inner container to divide a lower space and an upper space, an inner working port is arranged on the side of the heat-insulating inner container corresponding to the upper space, an outer working port is arranged on the side of the Dewar container, a viewing window is arranged at the outer working port, and a heat-insulating window is arranged at the inner working port, and the heat-insulating window can be moved by a driving member to have a cooling state of closing the inner working port and a working state of exposing the inner working port.

[0007] The plate lower space is provided with a runway type high temperature superconducting magnet structure connected with an excitation power source arranged outside the Dewar container, the plate upper space is provided with a cold conduction clamp hand for clamping the high temperature superconducting sample, the cold conduction clamp hand cools the high temperature superconducting sample through a first refrigerator connected therewith, the cold conduction clamp hand warms the high temperature superconducting sample through a heating element connected therewith, the runway type high temperature superconducting magnet structure is cooled through a second refrigerator connected therewith, the plate upper space is further provided with a first temperature sensor for detecting the temperature of the high temperature superconducting sample and a second temperature sensor for detecting the temperature of the runway type high temperature superconducting magnet structure;

[0008] The heat insulation liner is provided with a laser device outside the outer working port and the inner working port for hitting the high temperature superconducting sample, and the plate upper space is provided with a camera for recording the running condition of the high temperature superconducting sample.

[0009] Further, the runway type high temperature superconducting magnet structure comprises a runway type frame body fixed with the heat insulation liner, the runway type frame body is formed with a runway type space limited by upper, lower and inner three sides on the peripheral side, the runway type space is provided with a superconducting magnet, and the superconducting magnet is positioned in the runway type space through a plurality of positioning members;

[0010] The superconducting magnet comprises a plurality of runway type insulating sheets, a runway type superconducting cake is arranged between adjacent two insulating sheets, and the runway type superconducting cake is made of high temperature superconducting ceramic material.

[0011] The positioning member comprises a positioning plate fixed with the runway type frame body, a flexible pad strip and a rigid pad strip are sequentially arranged outside the runway type superconducting cake between adjacent two insulating sheets, and a bolt is arranged on the positioning plate to press the rigid pad strip and the flexible pad strip to position the runway type superconducting cake.

[0012] Further, the flexible pad strip is made of a fluorine strip, and the rigid pad strip is made of a stainless steel strip.

[0013] Further, the heat preservation layer and the heat preservation window are both aluminum foil heat preservation cotton.

[0014] Further, the driving member comprises a telescopic cylinder fixed with the Dewar container, an elevating frame is connected to the output end of the telescopic cylinder, the elevating frame is located between the Dewar container and the heat insulation liner, and a heat preservation window is arranged at the end of the elevating frame.

[0015] Further, the first refrigerator and the second refrigerator respectively cool the cold conduction clamp hand and the runway type high temperature superconducting magnet structure through a first cold head.

[0016] The application adopts the above structure and has the advantages that: the simulation device can significantly shorten the experimental period, specifically can shorten to less than half of the original, greatly improve the experimental efficiency, and significantly reduce the experimental difficulty, which is specifically reflected in the following aspects:

[0017] Firstly, the runway type high-temperature superconducting magnet structure is adopted to improve the cooling temperature, specifically from the original 4K superconducting temperature to 30K-70K, the increase of superconducting temperature can greatly shorten the time to reach the experimental condition and significantly reduce the experimental difficulty.

[0018] Secondly, through the design of the structure space, on the one hand, the heat radiation leakage in the experimental process can be significantly reduced, thereby facilitating the shortening of the time to reach the experimental condition; on the other hand, for the runway type high-temperature superconducting magnet structure, it is arranged in a relatively closed space, which can more effectively avoid heat radiation leakage, thereby facilitating the formation of a stable magnetic field, the stable magnetic field is conducive to stable experiment, and the stable experiment is conducive to rapid collection of sample data, and ultimately helps to shorten the entire experimental period.

[0019] Thirdly, the difficulty of setting the runway type high-temperature superconducting magnet structure is overcome, specifically after the magnet structure is energized and excited, it has an outward collapsing force, for the traditional low-temperature superconducting magnet structure, it has metal hardness, so it is easy to fasten to form a stable magnetic field; for the high-temperature superconducting magnet structure, it adopts high-temperature superconducting ceramic material and is not easy to fasten, and if it is not fixed well, it is not conducive to the formation of a stable magnetic field, the application designs the runway type high-temperature superconducting magnet structure, which can better fix the magnet structure and ensure the formation of a stable magnetic field, the stable magnetic field is conducive to stable experiment, and the stable experiment is conducive to rapid collection of sample data, and ultimately helps to shorten the entire experimental period. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of one embodiment of the application;

[0021] Figure 2 is one of the top views of Figure 1 ;

[0022] Figure 3 is a partial sectional view of the structure of Figure 2 in the B-B direction;

[0023] Figure 4 is a partial sectional view of the structure of Figure 2 in the A-A direction;

[0024] Figure 5 is a schematic view of the runway type high-temperature superconducting magnet structure in Figure 3 ;

[0025] Figure 6 isFigure 5 Enlarged structural diagram of section C.

[0026] In the figure, 1. Dewar container, 2. Insulated inner liner, 3. Drive component, 4. Racetrack-shaped high-temperature superconducting magnet structure, 5. High-temperature superconducting sample, 6. Cooling gripper, 7. Heating component, 8. Camera, 9. Single-stage refrigerator; 11. Viewing window, 21. Partition, 22. Under-plate space, 23. On-plate space, 24. Inner working port; 41. Racetrack-shaped frame, 42. Superconducting magnet, 43. Positioning component; 421. Racetrack-shaped insulating sheet, 422. Racetrack-shaped superconducting disc, 431. Positioning plate, 432. Flexible pad, 433. Rigid pad. Detailed Implementation

[0027] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application; however, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] like Figures 1-6 As shown in the figure, in this embodiment, the high-temperature superconducting magnetic levitation space debris simulation device includes a Dewar container 1, which has an insulated inner liner 2 inside. The insulated inner liner 2 is also covered with a heat insulation layer. To better show the structure of the device, the heat insulation layer is not shown in the figure, but it will be covered as needed in actual application. The insulated inner liner 2 has a partition 21 to separate the space below the partition 22 and the space above the partition 23. The side of the insulated inner liner 2 corresponding to the space above the partition 23 has an inner working port 24, and the side of the Dewar container 1 has an outer working port. The outer working port has a viewing window 11, and the inner working port has a heat insulation window. The heat insulation window can be moved by a driving component 3 so that it has a cooling state with the inner working port closed and a working state with the inner working port exposed.

[0030] The plate lower space 22 is provided with a racetrack type high temperature superconducting magnet structure 4, which is connected with the excitation power source arranged outside the dewar container 1. The plate upper space 23 is provided with a cold conducting clamp hand 6 for clamping the high temperature superconducting sample 5. The cold conducting clamp hand 6 cools the high temperature superconducting sample 5 through the first refrigerator connected therewith. The cold conducting clamp hand 6 warms the high temperature superconducting sample 5 through the heating element 7 connected therewith. The heating element 7 can be electrically heated through heating wires. The racetrack type high temperature superconducting magnet structure 4 is cooled through the second refrigerator connected therewith. The plate upper space 23 is further provided with a first temperature sensor for detecting the temperature of the high temperature superconducting sample 5 and a second temperature sensor for detecting the temperature of the racetrack type high temperature superconducting magnet structure 4.

[0031] The laser device for hitting the high temperature superconducting sample is arranged outside the heat insulation liner 2 corresponding to the outer working port and the inner working port. The structure of the laser device is not shown in the figure, but it is actually arranged on one side of the device as required. The plate upper space is provided with a camera 8 for recording the running condition of the high temperature superconducting sample.

[0032] In use, (1) the superconducting sample is clamped by the cold conducting clamp hand 6. (2) The inside of the device is vacuumized. (3) The cooling program is started. The high temperature superconducting sample 5 is cooled through the cold conducting clamp hand 6 by the first refrigerator, and the racetrack type high temperature superconducting magnet structure 4 is cooled by the second refrigerator. After the latter is cooled to the superconducting temperature, the external excitation power source is turned on to energize the racetrack type high temperature superconducting magnet structure 4, so that the magnet structure starts to excite to form potential surfaces with different magnetic field strengths. The closer to the magnet structure, the stronger the magnetic field, and the larger the area of the potential surface. The sample is set on a potential surface above the magnet structure according to the magnetic field strength. After the sample is cooled to the superconducting temperature, the sample in the magnetic field will generate diamagnetism (called superconducting diamagnetism, and there is no excitation wire passing through the sample at this time). In order to eliminate the diamagnetism, the sample is heated by the heating element to a set temperature, and then the sample becomes a non-superconducting state. At this time, the excitation wire will pass through the inside of the sample, and then the heating is stopped. The sample continues to cool under the action of the first refrigerator. After being cooled to the superconducting temperature, the excitation wire is fixed or frozen in the superconducting sample, forming a superconducting permanent magnet. Thus, the elimination of diamagnetism can be completed. At this time, it is equivalent to the existence of two magnetic fields, the magnetic field generated by the magnet structure and the magnetic field of the superconducting permanent magnet. There is a force between the two magnetic fields. At this time, the cold conducting clamp hand is released, and the superconducting permanent magnet will be stably suspended and will not move up or down. If an external force is applied to move up or down, it will still return to the potential surface. (4) The laser device is started to hit the sample. The sample will move on the potential surface, and the movement trajectory will be taken by the camera. Through the analysis of the movement trajectory, the movement state of the sample with the hitting force, the mass and the shape in the simulated space environment is obtained, and then the space research is carried out (the potential surface where the sample is stably suspended is similar to a flat space environment).

[0033] It can be understood that the experimental variables can be the laser intensity, the sample mass or the sample shape.

[0034] The high-temperature superconducting sample has the following structure: a YBCO high-temperature superconducting block is used, specifically a melt-textured growth preparation, and the superconducting transition temperature is 93K. An aluminum alloy metal shell is sleeved outside the YBCO high-temperature superconducting block, the gap is filled with vacuum grease, and a stainless steel gasket is placed on the upper end surface of the superconducting block for counterweight. In order to accurately control the temperature change of the high-temperature superconducting sample, and obtain stable and reliable high-temperature superconducting suspension sample heating and field cooling operation process parameters, a first temperature sensor is installed on the upper end surface of the high-temperature superconducting suspension sample and wrapped and fixed with aluminum foil.

[0035] Further, in order to form a stable magnetic field after power-on to enable stable testing, the runway-type high-temperature superconducting magnet structure 4 can have the following structure, as shown in Figures 5-6 The runway-type frame body 41 is fixed with the heat-insulating inner container 2, and the outer periphery of the runway-type frame body 41 forms a runway-type space limited by the upper, lower and inner three surfaces. The superconducting magnet 42 is arranged in the runway-type space, and the superconducting magnet 42 is positioned in the runway-type space by the plurality of positioning members 43. The superconducting magnet 42 includes a plurality of runway-type insulating sheets 421, and a runway-type superconducting cake 422 is arranged between adjacent two insulating sheets 421. The runway-type superconducting cake 422 is made of high-temperature superconducting ceramic material. The positioning member 43 includes a positioning plate 431 fixed with the runway-type frame body 41, and a flexible pad strip 432 and a rigid pad strip 433 are sequentially arranged outside the runway-type superconducting cake 422 between adjacent two insulating sheets 421. The positioning plate 431 is provided with a bolt, which is not shown. In actual application, the bolt is installed in the bolt hole of the positioning plate according to the need, so that the runway-type superconducting cake 422 can be positioned by pressing the rigid pad strip 432 and the flexible pad strip 433. The flexible pad strip can be a PTFE strip, and the rigid pad strip can be a stainless steel strip. The runway-type frame body can be made of a material with high thermal conductivity, such as copper.

[0036] In this application, the Dewar container, the heat-insulating inner container, the thermal insulation layer and other multi-layer thermal insulation materials can achieve good thermal insulation effect. Through spatial layout, it is beneficial to quickly cool to form a stable magnetic field for experiment. Through the runway-type superconducting magnet structure, the experimental difficulty is significantly reduced, and the experimental conditions can be quickly cooled to form a stable magnetic field for stable experiment. In the specific experimental process, the cooling time can be shortened from 4-5 days to 1-2 days, and the overall cycle is less than half of the original cycle. The experimental efficiency is greatly improved, and the experimental difficulty is also significantly reduced.

[0037] Further, the driving member can but is not limited to adopt the following structure: specifically comprising a telescopic cylinder fixed with the Dewar container, the output end of the telescopic cylinder is connected with a lifting frame, the lifting frame is located between the Dewar container and the heat insulation liner, the end of the lifting frame is provided with a heat preservation window, the heat preservation window is slightly larger than the inner working port.

[0038] Further, the heat preservation layer and the heat preservation window can but are not limited to adopt aluminum foil heat preservation cotton.

[0039] Further, the first refrigerator and the second refrigerator respectively cool the cold guiding clamp hand and the runway type high-temperature superconducting magnet structure through the first-stage cold head via the cold guiding component. Since the superconducting temperature of cooling is high, the first-stage cold head can be adopted for cooling, thereby facilitating rapid cooling to experimental conditions.

[0040] The first refrigerator and the second refrigerator can both adopt single-stage refrigerators 9, specifically, a large-power refrigerator can also be shared for cooling.

[0041] The above specific embodiments cannot be regarded as a limitation on the protection scope of the present application, and any alternative improvement or transformation made by the skilled in the art to the embodiments of the present application falls within the protection scope of the present application. The unexplained part of the present application is the known technology of the skilled in the art.

Claims

1. A high temperature superconducting magnetic levitation space debris simulation device, characterized by, The application relates to a high-temperature superconducting sample testing device, which comprises a Dewar container, a heat-insulating inner container arranged in the Dewar container, a heat-insulating layer arranged outside the heat-insulating inner container, a partition plate arranged in the heat-insulating inner container to divide a lower space and an upper space, an inner work opening arranged on a side of the heat-insulating inner container corresponding to the upper space, an outer work opening arranged on a side of the Dewar container, a visual window arranged at the outer work opening, and a heat-insulating window arranged at the inner work opening and capable of moving by a driving element to have a cooling state of closing the inner work opening and a working state of exposing the inner work opening. A runway-type high-temperature superconducting magnet structure is arranged in the lower space and connected with an excitation power source arranged outside the Dewar container; a cold-conducting clamp hand for clamping a high-temperature superconducting sample is arranged in the upper space; the cold-conducting clamp hand cools the high-temperature superconducting sample by a first refrigerator connected with the cold-conducting clamp hand; the cold-conducting clamp hand heats the high-temperature superconducting sample by a heating element connected with the cold-conducting clamp hand; the runway-type high-temperature superconducting magnet structure is cooled by a second refrigerator connected with the runway-type high-temperature superconducting magnet structure; a first temperature sensor for detecting the temperature of the high-temperature superconducting sample and a second temperature sensor for detecting the temperature of the runway-type high-temperature superconducting magnet structure are arranged in the upper space. A laser device for hitting the high-temperature superconducting sample is arranged outside the heat-insulating inner container corresponding to the outer work opening and the inner work opening; and a camera for recording the running condition of the high-temperature superconducting sample is arranged in the upper space. The runway-type high-temperature superconducting magnet structure comprises a runway-type frame fixed with the heat-insulating inner container, a runway-type space formed by upper, lower and inner three sides of the periphery of the runway-type frame, and a superconducting magnet arranged in the runway-type space and positioned in the runway-type space by a plurality of positioning elements. The superconducting magnet comprises a plurality of runway-type insulating sheets, and a runway-type superconducting cake arranged between adjacent two insulating sheets; the runway-type superconducting cake is made of high-temperature superconducting ceramic material. The positioning element comprises a positioning plate fixed with the runway-type frame, and a flexible pad strip and a rigid pad strip arranged between adjacent two insulating sheets outside the runway-type superconducting cake in sequence; a bolt is arranged on the positioning plate to press the rigid pad strip and the flexible pad strip to position the runway-type superconducting cake.

2. The high temperature superconducting magnetic levitation space debris simulation device of claim 1, wherein, The flexible pad strip is made of a Teflon strip, and the rigid pad strip is made of a stainless steel strip.

3. The high temperature superconducting magnetic levitation space debris simulation device of claim 1, wherein, The heat-insulating layer and the heat-insulating window are both made of aluminum foil heat-insulating cotton.

4. The high temperature superconducting magnetic levitation space debris simulation device of claim 1, wherein, The driving element comprises a telescopic cylinder fixed with the Dewar container, an output end of the telescopic cylinder is connected with a lifting frame, the lifting frame is located between the Dewar container and the heat-insulating inner container, and a heat-insulating window is arranged at the tail end of the lifting frame.

5. The high temperature superconducting magnetic levitation space debris simulation device of claim 1, wherein, The first refrigerator and the second refrigerator respectively cool the cold-conducting clamp hand and the runway-type high-temperature superconducting magnet structure through a first-level cold head.

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