Superconducting coil structure mechanical property testing device and testing method thereof

Abstract

The invention discloses a device and a method for testing mechanical properties of a superconducting coil structure, relates to the technical field of stress measurement, and mainly aims to quickly and accurately test the mechanical properties of various superconducting coils. According to the main technical scheme, the device for testing the mechanical property of the superconducting coil structure comprises a compression assembly and a detection assembly; the compression assembly is used for applying pressure to the to-be-tested sample; the detection assembly is respectively connected with the compression assembly and the to-be-detected sample, and the detection assembly is used for detecting and recording the load of the compression assembly acting on the to-be-detected sample and the strain generated by the to-be-detected sample.

Description

Technical Field

[0001] The present invention relates to the technical field of stress measurement, and in particular to a superconducting coil structure mechanical property testing device and a testing method thereof. Background Art

[0002] In today's science and technology field, the development of superconducting technology has attracted much attention. As a key component of superconducting technology, the mechanical properties of superconducting coils are crucial to the stability, reliability and safety of superconducting equipment.

[0003] With the widespread application of superconducting technology in many fields such as energy transmission, medical equipment, scientific research, etc., the performance requirements for superconducting coils are getting higher and higher. On the one hand, superconducting coils are often subjected to various external forces in the actual working environment, such as pressure, stretching, twisting, etc. These external forces may affect the superconducting performance of the superconducting coils, and even cause damage to the coils, thus affecting the normal operation of the entire superconducting equipment.

[0004] On the other hand, accurate understanding of the mechanical properties of superconducting coils is of great significance for optimizing the design of superconducting coils, improving their manufacturing process level, and ensuring their reliability in different application scenarios. However, there is currently no device specifically designed to test the mechanical properties of superconducting coil structures. Therefore, there is an urgent need for a superconducting coil structure mechanical properties testing device that is highly applicable, easy to operate, and has low overall cost. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a superconducting coil structure mechanical property testing device and a testing method thereof, the main purpose of which is to quickly and accurately perform mechanical property tests on various superconducting coils.

[0006] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0007] A first aspect of an embodiment of the present invention provides a superconducting coil structure mechanical properties testing device, comprising:

[0008] A compression component, the compression component is used to apply pressure to the sample to be tested;

[0009] A detection component is connected to the compression component and the sample to be tested respectively, and is used to detect and record the load applied by the compression component to the sample to be tested and the strain generated by the sample to be tested.

[0010] Further, the compression assembly includes a first pressure head, a second pressure head and a driving structure;

[0011] The first pressing head is arranged opposite to the second pressing head, and the sample to be tested is placed on the second pressing head at a position relative to the first pressing head. The first pressing head is connected to the driving structure, and the driving structure is used to drive the first pressing head to move closer to or away from the second pressing head to apply different amounts of pressure to the sample to be tested.

[0012] Further, the compression assembly also includes a locking ring;

[0013] The locking ring is coaxially arranged with the driving end of the driving structure, and the locking ring has a first end and a second end opposite to each other, the first end is used for connecting to the driving end of the driving structure, and the second end is used for connecting to the first pressure head.

[0014] Further, the compression assembly also includes a first support plate and a second support plate;

[0015] The driving structure is fixed to a side of the first support plate relative to the second support plate, the second pressure head is fixed to a side of the second support plate relative to the first support plate, the first support plate is parallel to the second support plate, a support column is provided between the first support plate and the second support plate, and a movable plate is movably provided on the support column;

[0016] The movable plate comprises a first surface and a second surface facing each other, the first surface is provided with a groove, the groove is used to fix the driving end of the driving structure, and the second surface is provided with a boss, the boss is used to connect the locking ring.

[0017] Furthermore, at least four support rods are provided;

[0018] The movable plate is provided with at least four through holes penetrating the first surface and the second surface, and the at least four through holes are arranged in one-to-one correspondence with the at least four support rods;

[0019] Wherein, the inner diameter of the through hole is larger than the outer diameter of the support rod.

[0020] Furthermore, at least four positioning members are arranged on at least four of the support rods and on the side of the movable plate away from the sample to be tested, and at least four of the positioning members are located in the same plane, which is parallel to a surface of one side of the sample to be tested relative to the first pressure head.

[0021] Further, the detection assembly includes a load management system and a strain monitoring system;

[0022] The load management system comprises an interactive display platform and a pressure sensing element, wherein the interactive display platform is connected to the pressure sensing element, and the pressure sensing element is arranged at the contact part between the compression component and the sample to be tested, and the pressure sensing element is used to sense the pressure information applied by the compression component on the sample to be tested in real time, and transmit the pressure information to the interactive display platform;

[0023] The strain monitoring system includes a data acquisition device and a strain sensing element. The data acquisition device is connected to the strain sensing element. The strain sensing element is attached to the surface of the sample to be tested. The strain sensing element is used to monitor the strain information generated by the sample to be tested under pressure in real time and transmit the strain information to the data acquisition device.

[0024] Furthermore, at least two strain sensing elements are provided, and the at least two strain sensing elements include a first strain gauge and a second strain gauge, wherein the sensitive grid direction of the first strain gauge is parallel to the pressure direction, and the sensitive grid direction of the second strain gauge is perpendicular to the pressure direction.

[0025] Furthermore, the first strain gauge and the second strain gauge are located on the same peripheral side surface of the sample to be tested.

[0026] Furthermore, the first strain gauge and the second strain gauge are respectively located on different peripheral sides of the sample to be tested.

[0027] A second aspect of an embodiment of the present invention provides a method for testing the mechanical properties of a superconducting coil structure, using a superconducting coil structure mechanical properties testing device as described in any one of the above;

[0028] During the operation of the superconducting coil structure mechanical property testing device, the load is gradient loaded, and the same time interval is used during the loading process;

[0029] The load is applied repeatedly at a low load value and the strain and load are observed to determine whether the strain and load are repeatable. If they are repeatable, loading is performed according to a preset gradient loading scheme.

[0030] By means of the above technical solution, the present invention has at least the following beneficial effects:

[0031] The superconducting coil structure mechanical properties testing device provided in the embodiment of the present invention can accurately apply pressure to the superconducting coil. Through the precise control of the compression component, it can simulate different degrees of actual working pressure environment, and provide reliable pressure input conditions for subsequent mechanical properties analysis. The detection component can simultaneously detect and record the load of the compression component on the superconducting coil and the strain generated by the superconducting coil. This enables a comprehensive and detailed quantitative analysis of the mechanical response of the superconducting coil under pressure, providing accurate data support for the evaluation of its mechanical properties. At the same time, the superconducting coil structure mechanical properties testing device provided in the embodiment of the present invention integrates compression and detection functions, has strong applicability, is relatively simple to operate, and can quickly and effectively perform mechanical property tests on various superconducting coils. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a superconducting coil structure mechanical properties testing device provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a compression assembly provided by an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the structure of a sample to be tested provided in an embodiment of the present invention.

[0035] The reference numerals are:

[0036] 1. Sample to be tested; 2. First pressure head; 3. Second pressure head; 4. Driving structure; 5. Locking ring; 6. First support plate; 7. Second support plate; 8. Support column; 9. Moving plate; 10. Positioning member; 11. Interactive display platform; 12. Data acquisition device; 13. Strain sensing element; 131. First strain gauge; 132. Second strain gauge. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail in conjunction with the accompanying drawings in the preferred embodiments of the present invention. In conjunction with the accompanying drawings, some implementation methods of the invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] See also Figures 1 to 3 As shown, in the first aspect of an embodiment of the present invention, a superconducting coil structure mechanical properties testing device is provided, including: a compression component, the compression component is used to apply pressure to a sample 1 to be tested; a detection component, the detection component is respectively connected to the compression component and the sample 1 to be tested, and the detection component is used to detect and record the load applied by the compression component on the sample 1 to be tested and the strain generated by the sample 1 to be tested.

[0039] The superconducting coil structure mechanical properties testing device provided in the embodiment of the present invention can accurately apply pressure to the sample 1 to be tested. Through the precise control of the compression component, it can simulate different degrees of actual working pressure environments, and provide reliable pressure input conditions for subsequent mechanical properties analysis. The detection component can simultaneously detect and record the load of the compression component on the sample 1 to be tested and the strain generated by the sample 1 to be tested. This enables a comprehensive and detailed quantitative analysis of the mechanical response of the sample 1 to be tested under pressure, providing accurate data support for evaluating its mechanical properties. At the same time, the superconducting coil structure mechanical properties testing device provided in the embodiment of the present invention integrates compression and detection functions, has strong applicability, is relatively simple to operate, and can quickly and effectively perform mechanical properties tests on various samples 1 to be tested.

[0040] Specifically, in this embodiment, the sample 1 to be tested is a superconducting coil, and the testing device is used to quickly and accurately perform mechanical property tests on various superconducting coils.

[0041] The compression component can generate pressure by mechanical, hydraulic or pneumatic means, and accurately transmit it to the sample 1 to be tested, ensuring that the pressure applied to the sample 1 to be tested is stable and accurate. At the same time, the compression component can adjust the pressure and loading rate according to the test requirements to simulate different actual working conditions. It is understandable that the compression component can be equipped with a control system to monitor and adjust the pressure output by the compression component in real time to meet different test requirements.

[0042] Specifically, the compression component can be a screw pressurizing device, a lever mechanism, a hydraulic jack, a hydraulic cylinder, a gas cylinder, a gas-liquid booster cylinder, etc. For example, the compression component is a screw pressurizing device, which uses the combination of a screw and a nut to push the pressure plate to apply pressure to the sample 1 to be tested by rotating the screw. The screw can be rotated manually or driven by a motor to achieve precise pressure control; the compression component is a lever mechanism, which uses the lever principle to apply force at one end of the lever to generate a large pressure at the other end to act on the sample 1 to be tested. The pressure can be controlled by adjusting the length of the lever arm and the magnitude of the applied force; the compression component is a hydraulic jack, which uses the hydraulic principle to inject hydraulic oil into the oil cylinder of the jack through a hydraulic pump, and push the piston up to apply pressure to the sample 1 to be tested. The magnitude of the applied pressure can be controlled by adjusting the output pressure of the hydraulic pump; the compression component is a hydraulic cylinder, which is composed of a hydraulic cylinder body, a piston and a piston rod. The pressure oil provided by the hydraulic system pushes the piston to move, thereby applying pressure to the sample 1 to be tested. The pressure can be precisely adjusted by controlling the pressure and flow of the hydraulic system; the compression component is a cylinder, which uses compressed air to push the piston in the cylinder to move, and applies pressure to the sample 1 to be tested. The pressure can be controlled by adjusting the air pressure; the compression component is a gas-liquid booster cylinder, which drives the hydraulic oil through compressed air, thereby generating a large pressure to act on the sample 1 to be tested. A higher pressure output and better pressure control accuracy can be achieved.

[0043] The detection component is connected to the compression component and can monitor the load applied by the compression component to the sample 1 to be tested in real time.

[0044] Specifically, the detection component can realize load detection by combining a pressure sensor, a force sensor and a lever system. When the detection component performs load detection through a pressure sensor, the pressure sensor can be installed near the contact point between the compression component and the sample 1 to be tested, and directly measures the pressure applied by the compression component to the sample 1 to be tested. There are many types of pressure sensors, such as strain gauge pressure sensors, piezoelectric pressure sensors, etc. When the detection component performs load detection through a force sensor and a lever system, the force sensor and the lever system measure the force at one end of the lever through the force sensor, and then calculate the load applied to the sample 1 to be tested based on the lever principle.

[0045] The detection component is connected to the sample 1 to be tested, and is used to detect the strain generated when the sample 1 to be tested is subjected to pressure.

[0046] Specifically, the detection component can realize strain detection through strain gauges, fiber grating sensors, optical strain measurement systems, etc. When the detection component performs strain detection through strain gauges, the strain gauges are pasted on the surface of the sample 1 to be tested. When the sample is deformed by pressure, the resistance value of the strain gauge will change. By measuring the resistance change of the strain gauge, the strain of the sample 1 to be tested can be calculated. When the detection component performs strain detection through fiber grating sensors, the fiber grating sensors are embedded or pasted in the sample 1 to be tested. When the sample 1 to be tested is deformed, the wavelength of the fiber grating will change. By measuring the wavelength change, the strain of the sample 1 to be tested can be determined. When the detection component performs strain detection through an optical strain measurement system, optical principles, such as digital image correlation (DIC), are used to calculate the strain by taking surface images of the sample 1 to be tested under different loads and analyzing the displacement of pixels in the image.

[0047] The detection component can record the load and strain data after detecting them quickly and accurately. It is understood that the detection component can be equipped with a data acquisition system and a storage device for subsequent analysis and processing.

[0048] Among them, the mechanical performance parameters of the sample 1 to be tested conform to the formula:

[0049]

[0050] In the formula, E n is the compression modulus of the sample 1 to be tested; E τ is the shear modulus of the sample 1 to be tested; μ is the Poisson's ratio of the sample 1 to be tested; a and b are the length and width of the sample 1 to be tested, respectively; F s is the load of the compression component on the sample 1 to be tested, obtained by testing the detection component; ε n is the normal strain of the sample 1 to be tested, obtained by testing the detection component; ε τ is the shear strain of the sample 1 to be tested, which is obtained by testing the detection component.

[0051] It should be noted that the detection component in the superconducting coil structure mechanical properties testing device provided in the embodiment of the present invention can detect the compressive stress of the sample 1 to be tested on the one hand, and can detect the shear stress of the sample 1 to be tested on the other hand, so as to calculate the mechanical performance parameters of the sample 1 to be tested using the above formula.

[0052] In some embodiments, see Figure 2As shown, the compression assembly includes a first pressure head 2, a second pressure head 3 and a driving structure 4; the first pressure head 2 and the second pressure head 3 are arranged opposite to each other, and the sample 1 to be tested is placed on the second pressure head 3 at a position relative to the first pressure head 2, and the first pressure head 2 is connected to the driving structure 4, and the driving structure 4 is used to drive the first pressure head 2 to move closer to or away from the second pressure head 3, so as to apply different amounts of pressure to the sample 1 to be tested.

[0053] The first pressure head 2 and the second pressure head 3 arranged opposite to each other can provide a stable force-bearing surface for the sample 1 to be tested, ensuring that the pressure acts evenly on the sample 1 to be tested, thereby avoiding inaccurate test results caused by uneven pressure distribution.

[0054] Specifically, the sample 1 to be tested is placed on the second pressure head 3 at a position relative to the first pressure head 2, and the second pressure head 3 plays a role in supporting the sample 1 to be tested. Placing the sample at this specific position enables the first pressure head 2 to accurately align with the sample and apply pressure under the action of the driving structure 4.

[0055] The driving structure 4 may be electrically driven, hydraulically driven, pneumatically driven, mechanically driven, etc.

[0056] The driving structure 4 is connected to the first pressure head 2 and can accurately control the movement of the first pressure head 2. In other words, the driving structure 4 can accurately control the first pressure head 2 to move closer to or away from the second pressure head 3, so as to apply different pressures to the sample 1 to be tested. This allows the test device to simulate various pressure conditions under actual working conditions, improves the comprehensiveness and reliability of the test, and thus meets different test requirements, whether it is a fine test under a small pressure or an extreme performance test under a large pressure, it can be easily achieved.

[0057] Specifically, when the driving structure 4 drives the first pressure head 2 to approach the second pressure head 3, the distance between the two pressure heads decreases, and the pressure applied to the sample 1 gradually increases. Conversely, when the first pressure head 2 moves away from the second pressure head 3, the pressure decreases.

[0058] In some embodiments, see Figure 2As shown, the compression assembly also includes a locking ring 5; the locking ring 5 is coaxially arranged with the driving end of the driving structure 4, and the locking ring 5 has a first end and a second end relative to each other, the first end is used to connect the driving end of the driving structure 4, and the second end is used to connect the first pressure head 2. Therefore, when the locking ring 5 coaxially connects the first pressure head 2 with the driving end of the driving structure 4, it can ensure that the axial center of the first pressure head 2 is consistent with that of the driving end. In this way, during the force application process of the driving structure 4, the pressure can be uniformly transmitted to the first pressure head 2 along the axial direction, and then uniformly acts on the sample to be tested 1. It avoids the deviation of pressure transmission caused by inconsistent axial center, so that the local force of the sample to be tested 1 is too large or too small, thereby ensuring the accuracy and reliability of the test results. At the same time, the consistent axial center allows the first pressure head 2 to always maintain a stable motion trajectory during the movement process, reducing the additional stress and vibration caused by eccentricity, thereby avoiding the measurement error caused by unstable factors, improving the accuracy of the test device, and making the test data more accurately reflect the mechanical properties of the sample to be tested 1.

[0059] The locking ring 5 is a substantially annular structure, and extends along the axial direction of the driving end of the driving structure 4 .

[0060] The locking ring 5 is disposed between the driving structure 4 and the first pressing head 2. The two ends of the locking ring 5 in the axial direction are respectively a first end and a second end thereof, the first end is specifically an end close to the driving structure 4, and is used to connect to the driving end of the driving structure 4, and the second end is specifically an end close to the first pressing head 2, and is used to connect to the first pressing head 2.

[0061] Among them, the first end of the locking ring 5 can be directly connected or indirectly connected to the driving end of the driving structure 4, etc., and the present invention does not limit this. It can be understood that when the first end of the locking ring 5 is directly connected to the driving end of the driving structure 4, mutually matching threads are set at the first end of the locking ring 5 and the driving end of the driving structure 4, and the locking ring 5 is tightly connected to the driving end by rotating it, or a corresponding snap-on structure is set at the first end of the locking ring 5 and the driving end, and the two are quickly connected by pressing or rotating, or the first end of the locking ring 5 is connected to the driving end by welding to ensure the firmness of the connection; when the first end of the locking ring 5 is indirectly connected to the driving end of the driving structure 4, an intermediate connector can be set to connect the first end of the locking ring 5 with the driving end of the driving structure 4.

[0062] In order to ensure that the force generated by the drive structure 4 can be transmitted from the locking ring 5 to the first pressure head 2 without loss, the second end of the locking ring 5 is directly connected to the first pressure head 2. Since there is no interference from the intermediate link, the force transmission is faster and more direct, so that the first pressure head 2 can respond to the action of the drive structure 4 in time, thereby improving the response speed and control accuracy of the test device. It should be noted that the way the second end of the locking ring 5 is directly connected to the first pressure head 2 is the same as the way the first end of the locking ring 5 is directly connected to the drive end of the drive structure 4, which will not be repeated here.

[0063] In some embodiments, see Figure 2 As shown, the compression assembly also includes a first support plate 6 and a second support plate 7; the driving structure 4 is fixed to a side of the first support plate 6 relative to the second support plate 7, the second pressure head 3 is fixed to a side of the second support plate 7 relative to the first support plate 6, the first support plate 6 is parallel to the second support plate 7, a support column 8 is arranged between the first support plate 6 and the second support plate 7, and a movable plate 9 is movably arranged on the support column 8; the movable plate 9 includes a first surface and a second surface opposite to each other, the first surface is provided with a groove, the groove is used to fix the driving end of the driving structure 4, and the second surface is provided with a boss, and the boss is used to connect the locking ring 5.

[0064] The first support plate 6 and the second support plate 7 are planar structures. The driving structure 4 is fixed to the first support plate 6, and the second pressure head 3 is fixed to the second support plate 7. The first support plate 6 and the second support plate 7 provide a stable installation base for the driving structure 4 and the second pressure head 3, respectively, so as to ensure that the driving structure 4 and the second pressure head 3 will not shake or move due to external force during the test, thereby ensuring the stability and accuracy of the pressure application.

[0065] Specifically, the driving structure 4 is fixed to the side of the first support plate 6 relative to the second support plate 7. The driving structure 4 is a power source for providing pressure, and fixing it on the first support plate 6 can ensure that it remains stable during operation without shaking or displacement, thereby ensuring accurate application of pressure. The second pressure head 3 is fixed to the side of the second support plate 7 relative to the first support plate 6. The second pressure head 3 plays a role in supporting the sample 1 to be tested, and fixing it on the second support plate 7 can ensure that its position is stable, providing reliable support for the sample 1 to be tested.

[0066] The first support plate 6 and the second support plate 7 are parallel to each other, which helps to ensure that the forces on each component are uniform during the test and avoid uneven forces and test errors caused by non-parallelism.

[0067] Among them, a support column 8 is arranged between the first support plate 6 and the second support plate 7, the support column 8 is perpendicular to the first support plate 6 and the second support plate 7, and a movable plate 9 is movably arranged on the support column 8. The support column 8 plays the role of connecting and supporting the first support plate 6 and the second support plate 7, and at the same time provides a moving track for the movable plate 9. It should be noted that, in this embodiment, the first end of the locking ring 5 is indirectly connected to the driving end of the driving structure 4, and an intermediate connecting member is arranged between the first end of the locking ring 5 and the driving end of the driving structure 4, and the intermediate connecting member is the movable plate 9.

[0068] Specifically, the movable plate 9 includes a first surface and a second surface facing each other. The first surface of the movable plate 9 is provided with a groove, and the groove is used to fix the driving end of the driving structure 4, so that the driving end of the driving structure 4 is tightly combined with the movable plate 9, ensuring that when the driving structure 4 is working, the power can be accurately transmitted to the movable plate 9, thereby pushing the first pressure head 2 to apply pressure to the sample 1 to be tested; the second surface of the movable plate 9 is provided with a boss, and the boss is used to connect the locking ring 5 to ensure that the first pressure head 2 will not loosen or fall off during the pressure application process. By providing the boss, the connection between the locking ring 5 and the movable plate 9 can be made more secure, thereby improving the stability and reliability of the entire compression assembly.

[0069] In some embodiments, see Figure 1 and Figure 2 As shown, at least four support rods are provided; at least four through holes penetrating the first surface and the second surface are provided on the movable plate 9, and the at least four through holes are provided in one-to-one correspondence with the at least four support rods; wherein the inner diameter of the through hole is greater than the outer diameter of the support rod.

[0070] Among them, at least four support rods are provided, which can provide stable support and precise guidance for the moving plate 9 from multiple directions; at the same time, the lateral displacement of the moving plate 9 can be limited, so that it always moves in the vertical direction, ensuring the accurate application of pressure; at the same time, the redundancy of the compression assembly is increased. Even if one or several support rods have problems, the other support rods can still continue to provide support and guidance, reducing the risk of equipment failure and improving the reliability and stability of the test device.

[0071] Specifically, through holes penetrating the first surface and the second surface are opened on the movable plate 9 at positions relative to the at least four support rods. The number of the through holes is at least four, and these through holes correspond one-to-one to the at least four support rods, so that the at least four support rods can pass through the movable plate 9.

[0072] In order to accommodate manufacturing errors and installation deviations, the inner diameter of the through hole is larger than the outer diameter of the support rod, so that the movable plate 9 can slide smoothly on the support rod; at the same time, it is also convenient to easily remove the movable plate 9 from the support rod when maintenance or adjustment is required.

[0073] In some embodiments, see Figure 1 and Figure 2 As shown, at least four positioning members 10 are arranged on at least four support rods and on the side of the moving plate 9 away from the sample 1 to be tested, and the at least four positioning members 10 are located in the same plane, and the plane is parallel to the surface of one side of the sample 1 to be tested relative to the first pressure head 2. As a result, when the moving plate 9 is pushed by the driving structure 4, it can move in a direction parallel to the sample 1 to be tested, thereby ensuring that the pressure is evenly applied to the sample 1 to be tested, and avoiding the test error caused by the deviation of the pressure direction.

[0074] The positioning member 10 may be a locking nut, and a thread is provided on the outer peripheral wall of the support rod so that the locking nut can be firmly screwed on the support rod. It should be noted that the positioning member 10 plays a role in positioning and calibration during the assembly and debugging of the compression assembly.

[0075] Specifically, in actual application, the compression assembly is assembled as follows: first, the driving structure 4 is inspected to determine whether the output end action of the driving structure 4 is in a normal state. Next, the second pressure head 3 and the support rod are fixed on the second support plate 7. Subsequently, the movable plate 9 and the first pressure head 2 are locked by the locking ring 5. After that, the movable plate 9 and the first pressure head 2 are passed through the support rod and placed above the sample to be tested 1. The positions of at least four positioning members 10 are adjusted so that the side surface of the first pressure head 2 relative to the sample to be tested 1 and the side surface of the sample to be tested 1 relative to the first pressure head 2 are parallel to each other. Finally, the driving end of the driving structure 4 is mounted on the movable plate 9, and the first support plate 6 and the driving structure 4 are fixed.

[0076] Among them, a convex structure can be provided on one side surface of the second support plate 7 relative to the second boss, and a concave structure matching the convex structure is provided at the bottom of the second boss. The second ram 3 is fixed on the second support plate 7, specifically, the second ram 3 is sleeved on the convex structure of the second support, and when the second ram 3 is sleeved on the boss of the second support plate 7, the concave structure and the convex structure are closely matched, which limits the movement of the second ram 3 in all directions, so that the end face of the second ram 3 can be naturally parallel to the second support plate 7.

[0077] In some embodiments, see Figure 1As shown, the detection component includes a load management system and a strain monitoring system; the load management system includes an interactive display platform 11 and a pressure sensing element, the interactive display platform 11 is connected to the pressure sensing element, the pressure sensing element is arranged at the contact position between the compression component and the sample 1 to be tested, the pressure sensing element is used to sense the pressure information applied by the compression component to the sample 1 to be tested in real time, and transmit the pressure information to the interactive display platform 11; the strain monitoring system includes a data acquisition device 12 and a strain sensing element 13, the data acquisition device 12 is connected to the strain sensing element 13, the strain sensing element 13 is attached to the surface of the sample 1 to be tested, the strain sensing element 13 is used to monitor the strain information generated by the sample 1 to be tested under pressure in real time, and transmit the strain information to the data acquisition device 12.

[0078] Among them, the pressure sensing element is arranged at the contact part between the compression component and the sample 1 to be tested, and can sense the pressure information applied by the compression component to the sample 1 to be tested in real time. When the compression component applies pressure to the sample 1 to be tested, the pressure sensing element can quickly sense the magnitude of the pressure and convert it into a transmittable form such as an electrical signal. It can be understood that this direct pressure monitoring method can ensure the acquisition of the most accurate pressure data, providing a reliable basis for subsequent mechanical performance analysis.

[0079] The pressure sensing element transmits the pressure information to the interactive display platform 11, so that the operator can observe the pressure changes of the sample 1 in real time. This helps to adjust the test parameters in time to ensure that the test process is carried out within a safe range, and also facilitates the recording and analysis of pressure data at different stages.

[0080] The interactive display platform 11 is connected to the pressure sensing element, and the pressure sensing element transmits the sensed pressure information to the interactive display platform 11, so that the user can intuitively see the pressure magnitude of the sample 1 to be tested on the interactive display platform 11. In addition, the interactive display platform 11 can not only display the pressure information, but also serve as an interface for the operator to interact with the test system. Through this platform, the operator can set test parameters, start or stop the test, view historical data, etc., which improves the controllability and convenience of the test.

[0081] Among them, the strain sensing element 13 is attached to the surface of the sample 1 to be tested, and can monitor the strain information generated by the sample 1 under pressure in real time. When the sample 1 to be tested is deformed by pressure, the strain sensing element 13 will produce corresponding changes with the deformation of the sample, such as changes in resistance value. By measuring these changes, the strain magnitude of the sample 1 to be tested can be determined. It can be understood that since the strain sensing element 13 is tightly attached to the sample 1 to be tested, it can accurately capture the slight deformation of the sample and provide key data for analyzing the mechanical properties of the sample 1 to be tested.

[0082] Among them, the data acquisition device 12 is connected to the strain sensing element 13, and the strain sensing element 13 transmits the monitored strain information to the data acquisition device 12 for storage and processing. The data acquisition device 12 has a high-speed sampling rate and large-capacity storage capacity, which can meet the needs of real-time monitoring and long-term testing, ensuring that no important strain data will be missed.

[0083] Specifically, in this embodiment, by simultaneously monitoring pressure information and strain information, the detection component can provide comprehensive data support for evaluating the mechanical properties of the superconducting coil structure. Combining the data of the load management system and the strain monitoring system, various mechanical performance parameters of the sample 1 to be tested, such as compression modulus, shear modulus, etc., can be calculated, thereby gaining an in-depth understanding of the mechanical behavior of the sample 1 to be tested under different pressure conditions.

[0084] In some embodiments, see Figure 3 As shown, at least two strain sensing elements 13 are provided, and the at least two strain sensing elements 13 include a first strain gauge 131 and a second strain gauge 132. The sensitive grid direction of the first strain gauge 131 is parallel to the pressure direction, and the sensitive grid direction of the second strain gauge 132 is perpendicular to the pressure direction. In this way, strain information can be fully obtained, measurement accuracy can be improved, and data support can be provided for complex mechanical analysis and optimization design.

[0085] Among them, the sensitive grid direction of the first strain gauge 131 is parallel to the pressure direction, and the compressive stress of the sample 1 to be tested in the pressure direction can be directly measured to understand the axial deformation of the sample 1 to be tested when subjected to pressure, thereby determining the axial elastic modulus, yield strength and other mechanical parameters of the sample 1 to be tested.

[0086] The sensitive grid direction of the second strain gauge 132 is perpendicular to the pressure direction, and the shear stress of the sample 1 to be tested in the direction perpendicular to the pressure direction can be measured. The measurement of shear stress helps to analyze the lateral contraction or expansion of the sample 1 to be tested during the pressure process, as well as the Poisson's ratio and other characteristics of the sample 1 to be tested. By measuring the compressive stress and the shear stress at the same time, the three-dimensional strain state of the sample 1 to be tested under pressure can be fully understood.

[0087] Specifically, in some specific examples, see Figure 3 As shown, the first strain gauge 131 and the second strain gauge 132 are located on the same peripheral side of the sample 1 to be tested. Since the first strain gauge 131 and the second strain gauge 132 are located on the same peripheral side, the strains measured by the first strain gauge 131 and the second strain gauge 132 are strains in different directions of the sample 1 to be tested at the same position and at the same time. In this way, the high correlation between the compressive stress (measured by the first strain gauge 131) and the shear stress (measured by the second strain gauge 132) data can be ensured, which is convenient for accurate mechanical analysis.

[0088] In addition, the first strain gauge 131 and the second strain gauge 132 may also be arranged in the following manner:

[0089] The first strain gauge 131 and the second strain gauge 132 are respectively located on different peripheral sides of the sample 1 to be tested. For a sample 1 to be tested with a more complex shape or anisotropy, strain monitoring on a single side may not accurately reflect its overall deformation. Setting strain gauges on different peripheral sides can capture more complex deformation modes and provide richer data for analyzing the mechanical behavior of the sample 1 to be tested.

[0090] The second aspect of the embodiment of the present invention provides a method for testing the mechanical properties of a superconducting coil structure, using a superconducting coil structure mechanical properties testing device such as any of the above; during the operation of the superconducting coil structure mechanical properties testing device, the load is gradient loaded, and the same time intervals are set during the loading process. In this way, the changes in the mechanical properties of the sample 1 to be tested under different loads can be observed more accurately, avoiding excessive one-time loading that causes instantaneous damage to the sample and makes it impossible to obtain complete mechanical properties data. At the same time, the same time intervals during the loading process provide a stable time node for data acquisition. This ensures that the strain and load data can be recorded in a timely and accurate manner at each loading stage, which is convenient for subsequent analysis and processing.

[0091] Among them, the load is repeatedly applied at a low load value and the strain and load are observed to determine whether the strain and load are repeatable. If they are repeatable, the loading is performed according to the preset gradient loading scheme. It can be understood that through repeatability testing, abnormal conditions in the test process can be discovered in time, such as large data fluctuations and unstable measurement results. This helps to troubleshoot and solve problems in the early stages of the test, improving the success rate of the test and the reliability of the data.

[0092] Specifically, the above process is repeated multiple times to ensure that the strain corresponding to the load applied by the same driving structure 4 is the same. In addition, when the sample 1 to be tested is a superconducting coil, since the superconducting coil has anisotropy, in order to test the physical parameters in various directions, it is necessary to change the orientation of the sample 1 to be tested, and perform measurement and verification experiments on the physical parameters in other directions of the sample 1 to be tested, so as to fully understand the mechanical performance of the superconducting coil in different directions, and provide more accurate and comprehensive data support for the design, manufacture and application of superconducting coils.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A superconducting coil structure mechanical properties testing device, characterized in that: include: A compression component, the compression component is used to apply pressure to the sample to be tested; A detection component is connected to the compression component and the sample to be tested respectively, and is used to detect and record the load applied by the compression component to the sample to be tested and the strain generated by the sample to be tested.

2. The superconducting coil structure mechanical properties testing device according to claim 1, characterized in that: The compression assembly includes a first pressure head, a second pressure head and a driving structure; The first pressing head is arranged opposite to the second pressing head, and the sample to be tested is placed on the second pressing head at a position relative to the first pressing head. The first pressing head is connected to the driving structure, and the driving structure is used to drive the first pressing head to move closer to or away from the second pressing head to apply different amounts of pressure to the sample to be tested.

3. The superconducting coil structure mechanical properties testing device according to claim 2, characterized in that: The compression assembly also includes a locking ring; The locking ring is coaxially arranged with the driving end of the driving structure, and the locking ring has a first end and a second end opposite to each other, the first end is used for connecting to the driving end of the driving structure, and the second end is used for connecting to the first pressure head.

4. The superconducting coil structure mechanical properties testing device according to claim 3, characterized in that: The compression assembly also includes a first support plate and a second support plate; The driving structure is fixed to a side of the first support plate relative to the second support plate, the second pressure head is fixed to a side of the second support plate relative to the first support plate, the first support plate is parallel to the second support plate, a support column is provided between the first support plate and the second support plate, and a movable plate is movably provided on the support column; The movable plate comprises a first surface and a second surface facing each other, the first surface is provided with a groove, the groove is used to fix the driving end of the driving structure, and the second surface is provided with a boss, the boss is used to connect the locking ring.

5. The superconducting coil structure mechanical properties testing device according to claim 4, characterized in that: At least four support rods are provided; The movable plate is provided with at least four through holes penetrating the first surface and the second surface, and the at least four through holes are arranged in one-to-one correspondence with the at least four support rods; Wherein, the inner diameter of the through hole is larger than the outer diameter of the support rod.

6. The superconducting coil structure mechanical properties testing device according to claim 5, characterized in that: At least four positioning members are arranged on at least four of the support rods and on the side of the movable plate away from the sample to be tested. At least four of the positioning members are located in the same plane, which is parallel to a surface of one side of the sample to be tested relative to the first pressure head.

7. The superconducting coil structure mechanical properties testing device according to claim 1, characterized in that: The detection assembly includes a load management system and a strain monitoring system; The load management system comprises an interactive display platform and a pressure sensing element, wherein the interactive display platform is connected to the pressure sensing element, and the pressure sensing element is arranged at the contact part between the compression component and the sample to be tested, and the pressure sensing element is used to sense the pressure information applied by the compression component on the sample to be tested in real time, and transmit the pressure information to the interactive display platform; The strain monitoring system includes a data acquisition device and a strain sensing element. The data acquisition device is connected to the strain sensing element. The strain sensing element is attached to the surface of the sample to be tested. The strain sensing element is used to monitor the strain information generated by the sample to be tested under pressure in real time and transmit the strain information to the data acquisition device.

8. The superconducting coil structure mechanical properties testing device according to claim 7, characterized in that: At least two strain sensing elements are provided, and the at least two strain sensing elements include a first strain gauge and a second strain gauge. The sensitive grid direction of the first strain gauge is parallel to the pressure direction, and the sensitive grid direction of the second strain gauge is perpendicular to the pressure direction.

9. The superconducting coil structure mechanical properties testing device according to claim 8, characterized in that: The first strain gauge and the second strain gauge are located on the same peripheral side of the sample to be tested.

10. A method for testing the mechanical properties of a superconducting coil structure, characterized in that: A superconducting coil structure mechanical properties testing device as described in any one of claims 1 to 9; During the operation of the superconducting coil structure mechanical property testing device, the load is gradient loaded, and the same time interval is used during the loading process; The load is applied repeatedly at a low load value and the strain and load are observed to determine whether the strain and load are repeatable. If they are repeatable, loading is performed according to a preset gradient loading scheme.

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