Superconducting magnetic suspension bearing and test system thereof

Abstract

The invention belongs to the field of superconducting magnetic suspension bearings, particularly relates to a superconducting magnetic suspension bearing and a test system thereof, and aims to solve the problems of vacuum sealing and dynamic characteristic test of direct connection of a rotor and a motor in the prior art. The device comprises a superconducting magnetic suspension bearing stator, a permanent magnet rotor, a vacuum container, a refrigerator, a driving assembly, a load assembly and a data collection assembly, the load assembly is connected with the superconducting magnetic suspension rotor, the data collection assembly can collect test parameters of a test system, and the superconducting magnetic suspension bearing stator is arranged in the low-temperature vacuum container. And the superconducting magnetic suspension bearing rotor is arranged in the hollow cylinder of the low-temperature vacuum container. A magnetic driving device is adopted, a driving part is arranged outside a vacuum container, and the problem of vacuum sealing caused by axial direct connection of a driving motor and a superconducting magnetic suspension bearing rotor is solved; a cylindrical low-temperature vacuum container is adopted, and a superconducting magnetic suspension bearing rotor is arranged outside a low-temperature environment, so that the low-temperature environment sealing problem of the superconducting magnetic suspension bearing is solved.

Description

Technical Field

[0001] The present invention belongs to the field of superconducting magnetic suspension bearings, and in particular relates to a superconducting magnetic suspension bearing and a testing system thereof. Background Art

[0002] Superconducting magnetic bearings (SMBs) utilize the properties of superconductors to achieve contactless support and frictionless operation. Due to their high efficiency, frictionlessness, noiselessness, and long life, they are widely used in rotating machinery, such as flywheel energy storage systems, cryogenic pumps, and spacecraft attitude control equipment. Currently, SMBs are mostly used in flywheel energy storage systems, where they utilize a direct connection between the bearing rotor and the drive motor. However, sealing is a key issue that must be addressed for direct connection, and it is a key bottleneck limiting speed increases. Therefore, sealing issues and the constraints of direct connection design must be addressed. Furthermore, because SMBs operate in a cryogenic environment, there is currently no measurement and control platform for testing the actual operating conditions of SMBs during dynamic operation, making it impossible to analyze the dynamic characteristics of SMBs.

[0003] At present, a lot of research and exploration on improving the speed of superconducting magnetic levitation bearings and superconducting magnetic levitation bearing operation test systems have been carried out at home and abroad. For example, Chinese invention patent CN117394586A uses a magnetic fluid vacuum seal. This invention aims to solve the problem of complex rotary sealing in superconducting rotor refrigeration systems and increase the speed of superconducting magnetic levitation bearings. Chinese invention patent CN116667592A uses a conical plane eddy current coupling in a high-temperature superconducting flywheel energy storage device to improve the stability of the main shaft. Chinese invention patent CN107219476A fixes the permanent magnet rotor on a three-axis sliding module and controls the movement of the module through a servo motor to simulate the static operation of the superconducting magnetic levitation bearing, thereby testing the static suspension force and suspension stiffness of the superconducting magnetic levitation bearing, rather than testing the rotating operating state of the bearing. Chinese invention patent CN108869543A uses a hybrid superconducting magnetic levitation bearing to increase the speed of the superconducting magnetic levitation bearing. Chinese invention patent CN10473441A uses a magnetic drive device to isolate the energy storage part and the drive part to reduce the no-load loss of the system during energy storage and improve system efficiency.

[0004] In summary, existing research and inventions are mostly focused on increasing the speed, improving stability and reducing losses of superconducting magnetic bearings. However, due to the coupling problem of direct connection between the rotor and the motor and vacuum sealing, the problem of rotational dynamic testing of superconducting magnetic bearings has not been solved. Summary of the Invention

[0005] In order to solve the problem in the prior art that it is difficult to solve the problem of superconducting magnetic bearing rotation dynamic testing due to the direct connection between the rotor and the motor and the coupling of vacuum sealing, the present invention provides a superconducting magnetic bearing and a testing system thereof. The superconducting magnetic bearing includes a bearing rotor and a superconducting magnetic bearing stator;

[0006] The superconducting magnetic levitation bearing stator is arranged in a low-temperature vacuum container, the low-temperature vacuum container is in a hollow cylindrical shape, the superconducting magnetic levitation bearing rotor is arranged in the hollow cylinder of the low-temperature vacuum container, the superconducting magnetic levitation bearing rotor is coaxially arranged with the superconducting magnetic levitation bearing stator, and the air gap between the superconducting magnetic levitation bearing rotor and the low-temperature vacuum container is not greater than 5 mm.

[0007] The superconducting magnetic levitation bearing rotor is a coaxially arranged permanent magnet, and the superconducting magnetic levitation bearing stator is composed of a superconducting bulk material arrangement.

[0008] According to some embodiments of the present application, a superconducting magnetic levitation bearing is provided, the superconducting magnetic levitation bearing rotor is made of a permanent magnet neodymium iron boron magnet or a samarium cobalt magnet and a magnetic ring, the superconducting magnetic levitation bearing rotor is a plurality of cylindrical permanent magnets arranged in parallel and stacked, and there is a magnetic ring layer between each layer of permanent magnets of the superconducting magnetic levitation bearing rotor.

[0009] According to some embodiments of the present application, a superconducting magnetic levitation bearing is provided, the superconducting magnetic levitation bearing stator is made of YBCO or REBCO high-temperature superconducting blocks, and RE is one of Nd, Sm, Gd, and Dy.

[0010] In another aspect, some embodiments of the present application also provide a superconducting magnetic levitation bearing test system, which is applied to the superconducting magnetic levitation bearing test and includes a vacuum container, a refrigerator, a driving assembly, a load assembly, and a data collection assembly.

[0011] The low-temperature vacuum container is arranged in the vacuum container, the cold head of the refrigerator extends into the low-temperature vacuum container and is connected with the superconducting magnetic levitation bearing stator, the driving assembly can drive the superconducting magnetic levitation bearing rotor to rotate, the load assembly is connected with the superconducting magnetic levitation bearing rotor, and the data collection assembly can collect test parameters of the test system.

[0012] According to some embodiments of the present application, a superconducting magnetic levitation bearing test system is provided, a flange layer is arranged in the vacuum container, the low-temperature vacuum container is fixedly arranged on the flange layer, a cooling liquid is arranged in the low-temperature vacuum container, the cold head of the refrigerator is arranged on one side of the low-temperature vacuum container, the cold head penetrates through the vacuum container and the low-temperature vacuum container and is connected with the superconducting magnetic levitation bearing stator through a cold-copper plate.

[0013] According to some embodiments of the present application, a superconducting magnetic levitation bearing test system is provided, the driving assembly includes a driving motor, a driving shaft, a magnetic force driver driving disc, a magnetic force driver receiving disc, and a rotor shaft.

[0014] The output end of the drive motor is transmission-connected to one end of the drive shaft, the other end of the drive shaft is provided with the magnetic drive drive disk, the magnetic drive receiving disk is provided at one end of the rotor shaft, the drive shaft, the magnetic drive drive disk, the magnetic drive receiving disk and the rotor shaft are coaxially arranged, and the magnetic drive drive disk and the magnetic drive receiving disk are correspondingly arranged and respectively arranged on the outside and inside of the vacuum container.

[0015] According to a superconducting magnetic bearing testing system provided in some embodiments of the present application, the load assembly includes a load and a coupling, and the load is connected to the rotor shaft through the coupling.

[0016] According to a superconducting magnetic bearing test system provided in some embodiments of the present application, the data collection component includes a data display system, a data acquisition card, a load side speed sensor, a drive side speed sensor, and a temperature and magnetic field strength sensor;

[0017] The load-side speed sensor is arranged close to the load assembly, the drive-side speed sensor is arranged close to the drive shaft, and the temperature and magnetic field strength sensor is arranged close to the superconducting magnetic bearing stator. The data display system reads the system operation data in real time through a data acquisition card and displays the operation characteristic curve through a graphical interface.

[0018] According to some embodiments of the present application, a superconducting magnetic levitation bearing testing system is provided, wherein the magnetic drive drive disk is composed of multiple layers of permanent magnet rings and magnet rings with staggered magnetic poles, a continuous magnetic chain is formed between adjacent permanent magnet rings and magnet rings through magnetic material, and the magnetic receiving disk is a metal disk.

[0019] According to some embodiments of the present application, a superconducting magnetic bearing testing system is provided, which also includes a protective bearing, which is coaxially arranged with the superconducting magnetic bearing rotor. When the superconducting magnetic bearing loses control, the protective bearing can slow down and stop the superconducting magnetic bearing rotor through friction.

[0020] Beneficial effects of the present invention:

[0021] The present invention combines a magnetic drive device with a superconducting magnetic levitation bearing, and indirectly controls the speed of the superconducting magnetic levitation bearing by controlling the magnetic drive device. The driver and the superconducting magnetic levitation bearing rotor are located outside the low-temperature vacuum container. Compared with traditional superconducting magnetic levitation bearings, the vacuum dynamic sealing problem of the rotor is solved. The magnetic drive method is adopted to solve the problem that the superconducting magnetic levitation bearing cannot be dynamically measured under actual working conditions. By changing the weight of the load under the test system, the characteristics of the superconducting magnetic levitation bearing during dynamic operation under different load conditions can be measured.

[0022] A magnetic drive device and a cylindrical hollow low-temperature vacuum container are used, and the magnetic drive part and the superconducting magnetic levitation bearing rotor are placed outside the low-temperature container to solve the coupling problem of the superconducting magnetic levitation bearing rotor and the drive axial direct connection and vacuum sealing.

[0023] The use of a non-contact magnetic drive device solves the problem of difficulty in dynamic actual working condition operation testing of superconducting magnetic levitation bearings. By changing the load weight of the test system, the operation condition of the superconducting magnetic levitation bearing under different load conditions can be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 It is a structural schematic diagram of some embodiments of the present application.

[0026] In the figure: 1. Drive motor; 2. Drive shaft; 3. Magnetic drive drive disk; 4. Magnetic drive receiving disk; 5. Superconducting magnetic levitation bearing rotor; 6. Superconducting magnetic levitation bearing stator; 7. Flange layer; 8. Load; 9. Coupling; 10. Protective bearing; 11. Load side speed sensor; 12. Cold head; 13. Temperature and magnetic field strength sensor; 14. Low temperature vacuum container; 15. Vacuum container; 16. Bracket; 17. Platform; 18. Cooling copper plate; 19. Data collection component; 20. Rotor shaft; 21. Drive side speed sensor. DETAILED DESCRIPTION

[0027] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the relevant invention are shown in the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] like Figure 1 As shown, the present invention provides a superconducting magnetic bearing, including a superconducting magnetic bearing rotor 5 and a superconducting magnetic bearing stator 6;

[0030] The superconducting magnetic bearing stator 6 is disposed in a cryogenic vacuum vessel 14, which is in a hollow cylindrical shape. The superconducting magnetic bearing rotor 5 is disposed in the hollow cylinder of the cryogenic vacuum vessel 14. The superconducting magnetic bearing rotor 5 and the superconducting magnetic bearing stator 6 are coaxially disposed. The air gap between the superconducting magnetic bearing rotor 5 and the cryogenic vacuum vessel 14 is no greater than 5 mm.

[0031] The superconducting magnetic bearing rotor 5 is composed of multiple layers of permanent magnets arranged axially and coaxially, and the superconducting magnetic bearing stator 6 is composed of superconducting block materials.

[0032] The low temperature range of the low temperature vacuum container 14 is set to 4.2K-77K in this embodiment, where the unit K is Kelvin, indicating absolute temperature.

[0033] During specific implementation, the superconducting magnetic bearing is composed of a superconducting magnetic bearing rotor 5 and a superconducting magnetic bearing stator 6. The superconducting magnetic bearing rotor 5 and the superconducting magnetic bearing stator 6 are coaxially arranged. The superconducting magnetic bearing stator 6 is located in a cylindrical low-temperature vacuum vessel 14. The superconducting magnetic bearing rotor 5 is located at the hollow core of the cylindrical low-temperature vacuum vessel (outside the low-temperature environment). The superconducting magnetic bearing stator 6 is composed of superconducting block materials. The superconducting block materials are polished into tile shapes and spliced ​​into superconductor rings for providing suspension force. The superconducting magnetic bearing rotor 5 is composed of several layers of permanent magnet rings and thin magnet rings and is fixed as a whole on the rotor shaft 20.

[0034] In some embodiments, the superconducting magnetic bearing rotor 5 is made of permanent magnets such as neodymium iron boron magnets or samarium cobalt magnets and magnetic focusing rings. The superconducting magnetic bearing rotor 5 is composed of several layers of cylindrical permanent magnets stacked in parallel, and there is a magnetic focusing ring layer between each layer of permanent magnets in the superconducting magnetic bearing rotor 5.

[0035] In specific implementation, the superconducting magnetic bearing rotor 5 is made of permanent magnets neodymium iron boron magnets (NdFeB) or samarium cobalt magnets (SmCo) and magnetic rings, which are used to provide a magnetic field for the superconducting magnetic bearing stator 6 to generate a stable suspension force. The superconducting magnetic bearing rotor 5 is composed of several layers of cylindrical permanent magnets stacked in parallel. There is a magnetic ring layer between each layer of permanent magnets in the superconducting magnetic bearing rotor 5 and the whole is fixed.

[0036] In some embodiments, the superconducting magnetic bearing stator 6 is made of YBCO or REBCO high-temperature superconducting blocks, wherein the rare earth RE is one of neodymium Nd, samarium Sm, gadolinium Gd, and dysprosium Dy. The YBCO is yttrium barium copper oxide, and the REBCO is rare earth barium copper oxide.

[0037] Among them, the critical temperature T of REBCO high temperature superconducting block c ≈90K.

[0038] On the other hand, some embodiments of the present application further provide a superconducting magnetic bearing test system, which is applied to a superconducting magnetic bearing, including a vacuum container 15, a refrigerator, a drive assembly, a load assembly, and a data collection assembly;

[0039] The low-temperature vacuum container 14 is arranged in the vacuum container 15, the cold head 12 of the refrigerator extends into the low-temperature vacuum container 14 and is connected to the superconducting magnetic bearing stator 6, the driving component can drive the superconducting magnetic bearing rotor 5 to rotate, the load component is connected to the superconducting magnetic bearing rotor 5, and the data collection component 19 can collect the test parameters of the test system.

[0040] The lowest cooling temperature of the refrigerator in this embodiment is 4.2K, and the maximum power that can be provided when the temperature is maintained at 4.2K is 1.25W.

[0041] During specific implementation, the test parameters include rotation speed, temperature and magnetic field strength, etc. The low-temperature vacuum container 14 is a cylindrical low-temperature Dewar, and the low-temperature vacuum container 14 contains low-temperature liquid. The cooling and temperature control effect of the superconducting magnetic bearing stator 6 is achieved through the cold head 12. The drive component is used to rotate the superconducting magnetic bearing rotor 5 during the test. The data collection component 19 is the control and data acquisition part, including the drive motor control system, sensors, data acquisition card and data display system. Among them, the drive motor control system achieves stable control of the rotation speed through parameter adjustment.

[0042] In some embodiments, a flange layer 7 is provided in the vacuum container 15, a low-temperature vacuum container 14 is fixedly provided on the flange layer 7, a cooling liquid is provided in the low-temperature vacuum container 14, and a cold head 12 of the refrigerator is provided on one side of the low-temperature vacuum container 14. The cold head 12 passes through the vacuum container 15 and the low-temperature vacuum container 14 and is connected to the superconducting magnetic bearing stator 6 through a cooling copper plate 18.

[0043] During specific implementation, a flange layer 7 is provided in the middle of the vacuum container 15. The upper and lower ends of the flange layer 7 are respectively the low-temperature end and the load end. The material of the flange layer 7 is a high-strength non-magnetic material. Among them, the low-temperature vacuum container 14 is located at the low-temperature end, and the load assembly is located at the load end. The superconducting magnetic levitation bearing stator 6 and the cooling copper plate 18 are fixed inside the low-temperature vacuum container 14 and connected to the cold head 12 of the refrigerator to achieve the cooling and temperature control effect of the bearing stator.

[0044] In some embodiments, the drive assembly includes a drive motor 1 , a drive shaft 2 , a magnetic drive drive disk 3 , a magnetic drive receiving disk 4 , and a rotor shaft 20 ;

[0045] The output end of the drive motor 1 is transmission-connected to one end of the drive shaft 2. The other end of the drive shaft 2 is provided with a magnetic drive drive disk 3. The magnetic drive receiving disk 4 is provided at one end of the rotor shaft 20. The drive shaft 2, the magnetic drive drive disk 3, the magnetic drive receiving disk 4 and the rotor shaft 20 are coaxially arranged. The magnetic drive drive disk 3 and the magnetic drive receiving disk 4 are correspondingly arranged and are respectively arranged outside and inside the vacuum container 15.

[0046] During specific implementation, the bracket 16 is set on the platform 17, the drive motor 1 is set on the bracket 16, and the magnetic drive drive disk 3 is evenly arranged with multiple layers of permanent magnets, wherein the N poles and S poles of the permanent magnets are staggered. Under the drive of the drive motor 1, the magnetic torque of the magnetic drive drive disk 3 is transmitted to the magnetic drive receiving disk 4 of the drive device, driving the rotor shaft 20 and the superconducting magnetic levitation bearing rotor 5 to rotate. The magnetic drive receiving disk 4 and the rotor shaft 20 are placed in a vacuum sealed container, and the magnetic torque of the magnetic drive drive disk 3 is transmitted to the magnetic drive receiving disk 4 through a non-metallic magnetic window. The magnetic drive receiving disk 4 and the superconducting magnetic levitation bearing stator 6 are arranged in the vacuum sealed container, which solves the coupling problem of direct connection between the rotor and the drive shaft of the superconducting magnetic levitation bearing and vacuum sealing.

[0047] In some embodiments, the load assembly includes a load 8 and a coupling 9 , and the load 8 is connected to the rotor shaft 20 via the coupling 9 .

[0048] In specific implementation, the material of the load 8 is a high-strength material with high fatigue resistance, such as high-strength alloy steel. The load 8 is a cylinder with a load shaft integrated with the load 8 at the center. The load 8 is connected to the superconducting magnetic bearing stator 6 through the load shaft coupling 9. The load 8 can adjust the suspension force of the superconducting magnetic bearing by replacing loads of different weights.

[0049] In some embodiments, the data collection component 19 includes a data display system, a data acquisition card, a load-side speed sensor 11 , a drive-side speed sensor 21 , and a temperature and magnetic field strength sensor 13 ;

[0050] The load-side speed sensor 11 is set close to the load component, the drive-side speed sensor 21 is set close to the drive shaft 2, and the temperature and magnetic field strength sensor 13 is set close to the superconducting magnetic bearing stator 6. The data display system reads the system operation data in real time through the data acquisition card and displays the operation characteristic curve through a graphical interface.

[0051] In practice, the bearing test system includes a control and data acquisition component, primarily comprising a drive motor control system and an experimental data acquisition and display system. The drive motor control system controls the speed of the magnetic bearing rotor. A shaft-end speed sensor and a cryogenic temperature sensor are used to transmit the load shaft speed and superconducting block temperature to a data acquisition card. This collects and displays the measured data during the operation of the superconducting magnetic bearing. The load-side speed sensor 11 and the drive-side speed sensor 21 are SPH318-2FS Hall-effect speed sensors, and the magnetic field strength sensor (with temperature measurement) 13 is a 3AHD801LT cryogenic three-dimensional Hall-effect probe. The magnetic field strength sensor (with temperature measurement) 13 is located inside the superconducting block.

[0052] The present invention combines a magnetic drive device with a superconducting magnetic levitation bearing, and indirectly controls the speed of the superconducting magnetic levitation bearing by controlling the magnetic drive device. The driver and the superconducting magnetic levitation bearing rotor are located outside the low-temperature vacuum container. Compared with traditional superconducting magnetic levitation bearings, the dynamic sealing problem of the rotor is solved. The magnetic drive method is adopted to solve the problem that the superconducting magnetic levitation bearing cannot be dynamically measured under actual working conditions. By adjusting the weight of the load under the test system, the characteristics of the superconducting magnetic levitation bearing during dynamic operation under different load conditions can be measured.

[0053] In some embodiments, the magnetic drive drive disk 3 is composed of permanent magnet rings with staggered magnetic poles, and a continuous magnetic chain is formed between adjacent permanent magnet rings through magnetic material. The magnetic drive receiving disk 4 is a metal disk.

[0054] In some embodiments, a protective bearing 10 is further included. The protective bearing 10 is coaxially arranged with the superconducting magnetic bearing rotor 5. When the superconducting magnetic bearing loses control, the protective bearing 10 can slow down and stop the superconducting magnetic bearing rotor 5 through friction.

[0055] During specific implementation, the protective bearing 10 is located below the superconducting magnetic bearing rotor 5 and is at the center of the middle layer of the vacuum container 15. The protective bearing 10 has no direct contact with the vacuum container flange layer 7 when the superconducting magnetic bearing is in operation. When the superconducting magnetic bearing is out of control, the protective bearing 10 forces the superconducting magnetic bearing rotor to slow down and stop through friction, preventing the high-speed rotor from colliding with the stator, thereby protecting the superconducting magnetic bearing.

[0056] In the description of the present invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are intended solely for ease of description and are not intended to indicate or imply that the device or component described must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not intended to indicate or imply relative importance.

[0057] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0059] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A superconducting magnetic bearing, characterized in that: It includes a superconducting magnetic bearing rotor and a superconducting magnetic bearing stator; The superconducting magnetic bearing stator is arranged in a low-temperature vacuum container, which is in a hollow cylindrical shape. The superconducting magnetic bearing rotor is arranged in the hollow cylinder of the low-temperature vacuum container. The superconducting magnetic bearing rotor and the superconducting magnetic bearing stator are coaxially arranged, and the air gap between the superconducting magnetic bearing rotor and the low-temperature vacuum container is not greater than 5 mm. The superconducting magnetic suspension bearing rotor is a coaxially arranged permanent magnet, and the superconducting magnetic suspension stator is composed of an arrangement of superconducting block materials.

2. A superconducting magnetic bearing according to claim 1, characterized in that: The superconducting magnetic bearing rotor is made of permanent magnets such as neodymium iron boron magnets or samarium cobalt magnets and magnet rings. The superconducting magnetic bearing rotor is composed of several layers of cylindrical permanent magnets stacked in parallel. There is a magnet ring layer between each layer of permanent magnets in the superconducting magnetic bearing rotor.

3. The superconducting magnetic bearing according to claim 2, characterized in that: The superconducting magnetic bearing stator is made of YBCO or REBCO high-temperature superconducting blocks, wherein RE is one of Nd, Sm, Gd, and Dy.

4. A superconducting magnetic bearing test system, characterized in that: A superconducting magnetic bearing according to any one of claims 1 to 3, comprising a vacuum container, a refrigerator, a drive assembly, a load assembly, and a data collection assembly; A low-temperature vacuum container is arranged in the vacuum container, a cold head of the refrigerator extends into the low-temperature vacuum container and is connected to the superconducting magnetic bearing stator, the drive component can drive the superconducting magnetic bearing rotor to rotate, the load component is connected to the superconducting magnetic bearing rotor bearing, and the data collection component can collect test parameters of the test system.

5. A superconducting magnetic bearing test system according to claim 4, characterized in that: A flange layer is provided in the vacuum container, a low-temperature vacuum container is fixedly provided on the flange layer, a cooling liquid is provided in the low-temperature vacuum container, a cold head of the refrigerator is provided on one side of the low-temperature vacuum container, the cold head passes through the vacuum container and the low-temperature vacuum container and is connected to the superconducting magnetic bearing stator through a cooling copper plate.

6. A superconducting magnetic bearing test system according to claim 5, characterized in that: The drive assembly includes a drive motor, a drive shaft, a magnetic drive drive disk, a magnetic drive receiving disk and a rotor shaft; The output end of the drive motor is transmission-connected to one end of the drive shaft, the other end of the drive shaft is provided with the magnetic drive drive disk, the magnetic drive receiving disk is provided at one end of the rotor shaft, the drive shaft, the magnetic drive drive disk, the magnetic drive receiving disk and the rotor shaft are coaxially arranged, and the magnetic drive drive disk and the magnetic drive receiving disk are correspondingly arranged and respectively arranged on the outside and inside of the vacuum container.

7. A superconducting magnetic bearing test system according to claim 6, characterized in that: The load assembly includes a load and a coupling, and the load is connected to the rotor shaft through the coupling.

8. A superconducting magnetic bearing test system according to claim 7, characterized in that: The data collection component includes a data display system, a data acquisition card, a drive side speed sensor, a load side speed sensor, and a temperature and magnetic field strength sensor; The load-side sensor is arranged close to the load assembly, the drive-side sensor is arranged close to the drive shaft, and the temperature and magnetic field strength sensors are arranged close to the superconducting magnetic bearing stator. The data display system reads the system operation data in real time through a data acquisition card and displays the operation characteristic curve through a graphical interface.

9. A superconducting magnetic bearing test system according to claim 8, characterized in that: The magnetic drive drive disk is composed of a permanent magnet ring and a magnet ring with staggered magnetic poles. A continuous magnetic chain is formed between adjacent permanent magnet rings and magnet rings through magnetic materials. The magnetic receiving disk is a metal disk.

10. A superconducting magnetic bearing testing system according to claim 9, characterized in that: It also includes a protection bearing, which is coaxially arranged with the superconducting magnetic bearing rotor. When the superconducting magnetic bearing loses control, the protection bearing can slow down and stop the superconducting magnetic bearing rotor through friction.

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