Testing tool and testing method for superconducting tape

Abstract

According to the test tool and the test method for the superconducting tape, the test tool and the test method for the superconducting tape are improved, so that reliability evaluation of a superconducting coil in vibration and impact environments is realized, the test cost is reduced, and the test efficiency is improved. The superconducting tape testing tool comprises a base, a first traction part and two second traction parts, wherein the first traction part and the two second traction parts are fixed on the base; the two second traction parts are used for fixing two corresponding end parts of a to-be-tested tape; the first traction part is used for abutting against the position between the two ends of a to-be-detected strip. One of the second traction part and the first traction part is a movable end, the rest of the second traction part and the first traction part is a fixed end, and the movable end can move relative to the base in the traction direction so as to tension a to-be-tested strip; the first traction part and the second traction part are respectively provided with a binding face used for correspondingly abutting against a to-be-detected strip, and the binding faces are spaced from the base.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting coil testing, and in particular to a testing tool and a testing method for a superconducting tape. Background Art

[0002] As a key component in the modern high-tech field, superconducting coils play an irreplaceable role in high-end applications such as high-speed maglev trains, ultra-high-speed electromagnetic catapult systems, and advanced ship propulsion systems, thanks to their powerful magnetic field generation capabilities, compact size, and lightweight design. In these application scenarios, superconducting coils are usually used as the rotor components of synchronous motors. The advantage is that superconductors generate almost no loss or heat when carrying direct current, thereby significantly improving energy conversion efficiency and system performance.

[0003] However, superconducting coils face a series of complex mechanical challenges during actual operation, especially in a fast and dynamic environment. For example, the effect of harmonic magnetic fields, torque pulsation, and rapid acceleration changes during starting and braking can cause the superconducting coils to be subjected to significant vibration and impact loads. These mechanical factors not only affect the stable operation of the coils, but may also pose a serious threat to their structural integrity.

[0004] For reliability assessment of superconducting coils under vibration and shock environments, existing technologies mainly rely on complete vibration and shock tests on the entire high-temperature superconducting coil, but such testing methods are costly and inefficient. Summary of the invention

[0005] The purpose of the present invention is to provide a test fixture and a test method for superconducting tapes. By improving the test fixture and the test method for superconducting tapes, reliability evaluation of superconducting coils under vibration and impact environments is achieved, the test cost is reduced and the test efficiency is improved.

[0006] To achieve the above-mentioned purpose, the present invention provides a test fixture for superconducting tape, which includes a base and a first pulling part and two second pulling parts fixed to the base, the two second pulling parts are used to fix the two corresponding ends of the tape to be tested; the first pulling part is used to abut against the position between the two ends of the tape to be tested; one of the second pulling part and the first pulling part is a movable end, and the other is a fixed end, and the movable end can move relative to the base in the pulling direction to tighten the tape to be tested; the first pulling part and the second pulling part both have a fitting surface for abutting against the corresponding tape to be tested, and each of the fitting surfaces is spaced apart from the base.

[0007] By adopting the technical solution in this application, the vibration and impact resistance of the superconducting tape can be tested separately, thereby evaluating the vibration and impact resistance of the superconducting coil as a whole. This is because the test fixture in this application simulates the real working conditions of the superconducting wire, simulates the weakest position of the superconducting coil's vibration and impact resistance, and tests the weakest position during the test, thereby evaluating the vibration and impact resistance of the entire superconducting coil; this testing method is not only accurate, low-cost and efficient.

[0008] Optionally, the fitting surfaces of the first pulling portion and the second pulling portion are arc surfaces.

[0009] Optionally, the base is provided with a slide groove, which extends along the pulling direction and is located between the two second pulling parts; the first pulling part is slidably adapted to the slide groove and can be locked at a set position of the slide groove.

[0010] Optionally, the fitting surface located at the first pulling portion is defined as a first fitting surface, and the fitting surface located at the second pulling portion is defined as a second fitting surface;

[0011] In the pulling direction, the first bonding surface and the second bonding surface bulge in opposite directions, and both bulge in directions away from each other.

[0012] Optionally, a pulling assembly is further included, and the pulling assembly is fixedly connected to the first pulling portion.

[0013] Optionally, the pulling assembly includes a pulling rod and a rotating rod threadably matched with the pulling rod, and the rotating rod can rotate around the central axis of the pulling rod to drive the pulling rod to move along its axial direction;

[0014] Part of the pulling rod is located in the sliding groove, and part of the pulling rod extends out of the sliding groove to the outside of the base, and the rotating rod is matched with the part of the pulling rod located outside the base.

[0015] Optionally, the first pulling portion is provided with a slider assembly, and the slider assembly is located in the slide groove;

[0016] The slider assembly includes two slider bodies, the wall of the slide groove is provided with a convex plate, and the convex plate is located between the two slider bodies in the height direction;

[0017] The slider assembly is adapted to be equipped with a locking member, and the locking member is used to lock the two sliders to the convex plate.

[0018] Optionally, it further comprises a fixing member group for pressing the two ends of the strip to be tested to the second fitting surface in the extrusion direction; the fixing member group comprises an extrusion block, a guide block and a wedge block sequentially distributed along the extrusion direction, and the extrusion block is opposite to the second fitting surface;

[0019] A guide cavity is formed between the guide block and the extrusion block. In the height direction, the size of the guide cavity is gradually reduced from top to bottom, and the wedge block is adapted to the guide cavity.

[0020] Optionally, it also includes a vibration source, a pressure sensing device and a voltage acquisition device, wherein the pressure sensing device is used to test the tension exerted on the mobile end, and the voltage acquisition device is used to acquire the voltage of a set portion of the strip to be tested.

[0021] Optionally, it further comprises a clamping and fixing component, one end of which is fixedly connected to the base, and the other end is used to clamp the set position of the strip.

[0022] A superconducting tape testing method is suitable for a superconducting tape testing tool, and the superconducting tape testing method comprises:

[0023] Step 1, connect the strip to be tested to the fixed end and the movable end respectively to form a partially suspended strip;

[0024] Step 2, adjusting the mobile end in the pulling direction until the pulling force on the mobile end reaches a predetermined pulling force value;

[0025] Step 3, energize the strip to be tested, and start the vibration source to drive the strip to be tested to vibrate;

[0026] Step 4: While the strip to be tested is vibrating, the voltage of a set portion of the strip to be tested is collected.

[0027] A superconducting tape testing method is suitable for a superconducting tape testing tool, and the superconducting tape testing method comprises:

[0028] Step 1, connect the strip to be tested to the fixed end and the movable end respectively to form a partially suspended strip;

[0029] Step 2, adjusting the mobile end in the pulling direction until the pulling force on the mobile end reaches a predetermined pulling force value;

[0030] Step 3, energize the strip to be tested, and start the vibration source to drive the strip to be tested to vibrate;

[0031] Step 4: During the vibration of the strip to be tested, collecting the voltage of a set portion of the strip to be tested;

[0032] Wherein, the step 2 further comprises:

[0033] Step 21: The clamping and fixing component clamps a part of the suspended part, and the part clamped by the clamping and fixing component is defined as a solid sealing simulation area, and the length of the solid sealing simulation area is adjustable.

[0034] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0036] Figure 1 Schematic diagram of the structure of a superconducting tape testing tool in an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 Schematic diagram of the local structure;

[0038] Figure 3 yes Figure 2 Schematic diagram of the local structure;

[0039] Figure 4 This is one of the assembling methods of the superconducting tape in the embodiment of the present invention;

[0040] Figure 5 This is the second method of assembling the superconducting tape in the embodiment of the present invention;

[0041] Figure 6 is a side view of a test fixture for superconducting tape;

[0042] Figure 7 yes Figure 3 Schematic diagram of the local structure;

[0043] Figure 8 It is a schematic diagram of the structure of the clamping and fixing assembly;

[0044] Fig. 9 yes Figure 1 A top view of a part of the structure;

[0045] Fig.10 It is one of the assembly states of the vibration source and the test fixture;

[0046] Fig.11 This is the second assembly state of the vibration source and the test fixture;

[0047] Fig.12 This is the third assembly state of the vibration source and the test fixture;

[0048] Fig.13 It is a schematic diagram of the structure of the four-lead method;

[0049] Fig.14 It is one of the testing methods of the superconducting tape in the embodiment of the present invention;

[0050] Fig.15 This is the second test method for the superconducting tape in the embodiment of the present invention;

[0051] Fig.16 It is a structural schematic diagram of the superconducting coil in use.

[0052] Reference numerals:

[0053] 100-moving end; 101-first pulling part; 101a-first fitting surface; 200-fixed end; 201-second pulling part; 201a-second fitting surface; 300-base; 301-sliding groove; 302-convex plate; 400-pulling assembly; 401-pulling rod; 402-rotating rod; 403-stop plate; 500-sliding block assembly; 501-sliding block body; 502-connecting shaft; 600 -fixing parts group; 601-extrusion block; 602-guide block; 603-wedge block; 700-pressure sensing device; 800-voltage acquisition device; 801-voltage lead block; 900-clamping and fixing assembly; 901-positioning connector; 902-vibration guide plate; 903-first clamping block; 904-second clamping block; 1-strip; 11-suspended part; 2-vibration source; 3-test tooling; 4-superconducting coil. DETAILED DESCRIPTION

[0054] The present invention provides a testing tool and a testing method for a superconducting tape. By improving the testing tool and the testing method for a superconducting tape, reliability evaluation of a superconducting coil under vibration and impact environments is achieved, thereby reducing testing costs and improving testing efficiency.

[0055] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] Relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0057] Please refer to Figures 1 to 16 , Figure 1 is a schematic structural diagram of a superconducting tape testing tool in an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the local structure; Figure 3 yes Figure 2 Schematic diagram of the local structure; Figure 4 This is one of the assembling methods of the superconducting tape in the embodiment of the present invention; Figure 5This is the second method of assembling the superconducting tape in the embodiment of the present invention; Figure 6 is a side view of a test fixture for superconducting tape; Figure 7 yes Figure 3 Schematic diagram of the local structure; Figure 8 It is a schematic diagram of the structure of the clamping and fixing assembly; Fig. 9 yes Figure 1 A top view of a part of the structure; Fig.10 It is one of the assembly states of the vibration source and the test fixture; Fig.11 This is the second assembly state of the vibration source and the test fixture; Fig.12 This is the third assembly state of the vibration source and the test fixture; Fig.13 It is a schematic diagram of the structure of the four-lead method; Fig.14 It is one of the testing methods of the superconducting tape in the embodiment of the present invention; Fig.15 This is the second test method for the superconducting tape in the embodiment of the present invention; Fig.16 It is a structural schematic diagram of the superconducting coil in use.

[0058] like Fig.16 As shown in the figure, the outermost turn of the superconducting coil has a relatively fragile suspended area due to its relatively loose structure and direct connection with key components such as the external current source and the current terminal. Compared with the more closely arranged main body part inside the coil, the outermost turn is particularly weak in mechanics and is easily mechanically damaged under the action of vibration and impact load, thereby destroying the superconducting properties of the entire superconducting coil.

[0059] Once the superconducting state is destroyed, heat will accumulate in the local area. If not controlled in time, it may eventually cause thermal runaway and burnout of the entire coil, causing serious safety accidents and economic losses. Therefore, developing a new device and method that can effectively simulate the response of superconducting coils under vibration and impact loads, and significantly reduce testing costs and improve testing efficiency has become a technical problem that needs to be solved urgently.

[0060] like Figure 1-Figure 15 As shown, the present invention provides a test fixture 3 for a superconducting tape 1, the superconducting tape 1 is made of a flexible material, and the tape 1 is in a strip-shaped structure. The test fixture 3 includes a base 300, and a first pulling portion 101 and two second pulling portions 201 fixed to the base 300. The two second pulling portions 201 are relatively distributed in a set reference direction, and the first pulling portion 101 is located between the two second pulling portions 201 in the set reference direction, and the three are distributed at the vertex positions of a triangle.

[0061] The two second pulling parts 201 are used to fix the two corresponding ends of the strip material 1 to be tested; the first pulling part 101 is used to abut against the position between the two ends of the strip material 1 to be tested. The part where the first pulling part 101 abuts against the strip material 1 to be tested is located in the middle of the strip material 1 to be tested, or it can be an area biased to one side of the strip material 1 to be tested.

[0062] One of the second pulling part 201 and the first pulling part 101 is a movable end 100, and the other is a fixed end 200. The movable end 100 can move relative to the base 300 in the pulling direction to tighten the strip 1 to be tested to a set tension. The set tension is used to simulate the tension of the superconducting strip 1 in the suspended state after the superconducting coil 4 is formed, that is, the suspended part 11 in the figure.

[0063] One second pulling part 201 may be used as the movable end 100, another second pulling part 201 may be used as the fixed end 200, and the first pulling part 101 may also be used as the fixed end 200. At this time, one end of the strip 1 to be tested and the part that abuts against the first pulling part 101 are the fixed end 200, and the other end of the strip 1 to be tested connected to the movable end 100 is used as the movable end 100, driving the second pulling part 201 as the movable end 100 to move along the pulling direction, so that the strip 1 is fixed at both ends, and the other end moves to tighten the strip 1 to be tested to the set tension.

[0064] Alternatively, as shown in the figure, the two second pulling parts 201 are used as the fixed ends 200, and the first pulling part 101 is used as the movable end 100. By driving the first pulling part 101 to move along the pulling direction, the strip 1 to be tested is pulled to a set tension.

[0065] In the technical solution of the present application, the first pulling part 101 and the second pulling part 201 can be used to adjust the vibration and impact resistance of the strip 1 to be tested at a set tension and a set suspension length. The adjustment of different tensions and suspension lengths can be achieved by adjusting the first pulling part 101 and the second pulling part 201. In this way, the use condition of the superconducting coil 4 can be simulated, thereby improving the test accuracy of the superconducting coil 4.

[0066] In a specific embodiment, the first pulling portion 101 and the second pulling portion 201 both have a fitting surface for pressing against the corresponding tape 1 to be tested, and each fitting surface is spaced from the base 300. After the tape 1 to be tested is tightened, the tape 1 to be tested presses against the fitting surface and can be formed to fit the corresponding fitting surface, so the structure of the fitting surface defines the extension direction and shape of the tape 1 to be tested in this part.

[0067] In the solution of the present application, the shape of the bonding surface can be adjusted to simulate the connection between the suspended portion 11 and the main body of the superconducting coil 4. In the method of the present application, the bonding surface is spaced apart from the base 300 to better simulate the suspended portion 11 of the superconducting coil 4 during actual operation. Here, the spacing means that the portion of the strip 1 to be tested between the bonding surfaces does not form contact with the base 300.

[0068] In the specific test process, the strip 1 to be tested is fixed to the tooling, and the strip 1 is vibrated, and then the voltage of the suspended part 11 of the strip 1 is obtained, and then the conductive performance of the strip 1 in the vibration state is evaluated, and then the vibration and impact resistance of the strip 1 are evaluated.

[0069] By adopting the technical solution in the present application, the vibration and impact resistance of the superconducting tape 1 can be tested separately, thereby evaluating the vibration and impact resistance of the superconducting coil 4 as a whole. This is because the test fixture 3 in the present application simulates the real working conditions of the superconducting wire, and simulates the weakest position of the vibration and impact resistance of the superconducting coil 4, and during the test, the weakest position is tested, thereby evaluating the vibration and impact resistance of the entire superconducting coil 4; such a testing method is not only accurate, low-cost and efficient.

[0070] The specific structure of the test tool 3 in the present application is illustrated below with a specific embodiment.

[0071] As shown in the figure, the first pulling part 101 and the second pulling part 201 are both wheel-shaped structures, the axial direction of the wheel-shaped structure extends along the height direction of the base 300, and the plane where the radial direction is located is parallel to the upper surface of the base 300. Of course, in addition to this arrangement, the axial direction of the wheel-shaped structure can also extend in the horizontal direction, and the plane where the radial direction is located can extend along the height direction of the base 300. In this case, the plane where the tensioned strip 1 is located is perpendicular to the base 300, rather than parallel to the base 300 as shown in the figure. The specific method can be set by those skilled in the art according to the actual situation. Whether it is the above two methods or other equivalent and alternative methods, as long as the method that can tighten the strip 1 to form a predetermined tension and form the suspended part 11 of the strip 1 falls within the protection scope of this application.

[0072] In this embodiment, the wheel surface of the wheel-shaped structure is an arc surface, and the wheel surface is distributed around the central axis of the corresponding pulling part, and extends in the height direction, that is, extends along its axial direction. The wheel surface of the corresponding pulling part serves as its fitting surface. That is, the fitting surfaces of the first pulling part 101 and the second pulling part 201 are arc surfaces. The length of the arc surface can be 1 / 2 circle, 2 / 3 circle or 3 / 4 circle, etc., and the arc surface lengths of the fitting surfaces at different positions can be the same or different, and those skilled in the art can choose by themselves. In the above-mentioned embodiment, the curvature of the first fitting surface 101a and the second fitting surface 201a are adapted to the turning radius of the strip 1 to be tested, so as to avoid damage to the strip 1 to be tested due to too small a turning radius.

[0073] By using a curved surface for the fitting surface, the simulation of the actual use conditions at both ends of the suspended portion 11 of the strip 1 can be improved. In addition, the stress concentration at the supporting positions at both ends of the suspended portion 11 can be reduced, which may cause the accuracy of the performance evaluation of the strip 1 to be impaired. The curved surface for the fitting surface can effectively disperse the stress and provide better support stability.

[0074] The following is an example of the winding method of the strip 1 to be tested and the first pulling part 101 and the second pulling part 201 in this method. For the convenience of explanation, the strip 1 is defined as having a first strip surface and a second strip surface arranged relatively in the thickness direction; the two second pulling parts 201 are defined as having an inner wheel wall and an outer wheel wall, where "inside" and "outside" are defined based on a set reference direction. In the set reference direction, the wheel surfaces of the second pulling parts 201 close to each other are inner wheel walls, and vice versa are outer wheel walls; the first pulling part 101 is defined as having a top wheel wall and a bottom wheel wall connected to each other, where "top" and "bottom" are defined based on the pulling direction. In the pulling direction, the side close to the second pulling part 201 is the bottom wheel wall, and the side away from the second pulling part 201 is the top wheel wall. The fitting surface located at the first pulling part 101 is defined as the first fitting surface 101a, and the fitting surface located at the second pulling part 201 is defined as the second fitting surface 201a;

[0075] The strip material 1 to be tested is wound around the first pulling portion 101 and the second pulling portion 201 to form a nearly “J”-shaped structure or a “U”-shaped structure.

[0076] like Figure 4As shown, in the "Ji" - shaped structure, the points where the two ends of the strip 1 to be measured are fixed to the second pulling part 201 are located on the outer wheel wall, while the part in contact with the first pulling part 101 is located on the top wheel wall. That is to say, the first contact surface 101a is located on the top wheel wall, and one end of the second contact surface 201a for fixedly connecting with the end of the strip 1 is located on the outer wheel wall, and the other end of the second contact surface 201a is located on the inner wheel wall. Specifically, the surfaces of the strip 1 in contact with and against the first contact surface 101a and the second contact surface 201a are different strip surfaces of the strip 1. For example, the surface in contact with the first contact surface 101a is the first strip surface of the strip 1. After the two ends of the strip 1 extend to the second pulling part 201, they surround to the outside of the two second pulling parts 201 along the inner sides of the two second pulling parts 201, and the surface in contact with the second contact surface 201a is the second strip surface.

[0077] As Figure 5 shown, when the strip 1 to be measured is wound around the first pulling part 101 and the second pulling part 201 to form a "U" - shaped structure, different from the "Ji" - shaped structure, after the two ends of the strip 1 extend to the second pulling part 201, they wind to the inner sides of the two second pulling parts 201 along the outer sides of the two second pulling parts 201, and the positions where the two ends are fixed to the second contact surface 201a are located on the inner wheel wall of the second pulling part 201. In addition, different from the "Ji" - shaped structure, the surfaces of the strip 1 in contact with and against the first contact surface 101a and the second contact surface 201a are the same strip surface of the strip 1. In the above two ways, the part between the first contact surface 101a and the second contact surface 201a serves as the aforementioned suspended part 11.

[0078] That is to say, in the above - mentioned embodiments, in the pulling direction, the bulging directions of the first contact surface 101a and the second contact surface 201a are opposite, and both bulge in the direction away from each other. Thus, it can make the strip 1 to be measured tightened in the pulling direction.

[0079] In the above - mentioned embodiments, as an optional way, the way that the contact surface itself is spaced from the upper surface of the base 300 can prevent the strip 1 from contacting the base 300. When the two ends of the strip 1 are fixed to the fixed end 200, it also makes the strip 1 unable to move up and down. To further prevent the strip 1 from being misaligned relative to the contact surface, it can also be to further fix at different positions of the contact surface. The number of fixed positions of the contact surface with each fixed end 200 is at least one or several, and several can be evenly distributed along the circumference of the contact surface.

[0080] The fixing method of the strip 1 can be selected by welding the strip 1 to the fitting surface of the fixed end 200 or by extruding the strip 1 to the fitting surface. The fitting surface of the fixed end 200 is defined to include an arc segment and a straight segment connected to the arc segment. In the straight segment, the end of the strip 1 is extruded in the thickness direction to form a fixed connection.

[0081] In another embodiment, a clamping and fixing assembly 900 is further included, one end of which is fixedly connected to the base 300, and the other end is used to clamp the set position of the strip 1. Specifically, the clamping and fixing assembly 900 is used to fix and clamp a local area of ​​the suspended part 11 so that the suspended part 11 and the base 300 can form resonance. The clamping and fixing assembly 900 is directly connected to the vibration source 2 to ensure that the vibration can be directly transmitted to the suspended part 11. In this way, the vibration resistance and impact resistance performance of the suspended part 11 under vibration conditions can be evaluated in more detail.

[0082] In a specific example, the clamping and fixing assembly 900 includes a positioning connector 901, a vibration guide plate 902, a first clamping block 903, and a second clamping block 904. The positioning connector 901 can be fixedly connected to the base 300. Optionally, a stopper can be formed with the base 300 in the extension direction of the upper surface of the base 300, and a stopper can be formed with the base 300 in the height direction of the base 300. The clamping and fixing assembly 900 is used to clamp the strip 1 in the thickness direction.

[0083] In a more specific embodiment, the positioning connector 901 includes a connecting plate, which is used to fit the upper surface of the base 300. The connecting plate has a head end and a tail end, wherein the head end is used to be fixedly connected to the first clamp block 903 or the second clamp block 904, and the tail end is used to be fixedly connected to the base 300. In order to form resonance in the height direction, a first clamp arm is provided at the head end, and a second clamp arm is provided at the tail end. The first clamp arm is folded from the bottom wall of the first clamp block 903 or the second clamp block 904 to the top wall of the first clamp block 903 or the second clamp block 904, thereby pressing against each other in the height direction; the second clamp arm is folded from the upper surface of the base 300 to the lower surface of the base 300, thereby pressing against the base 300 in the height direction.

[0084] Part of the first clamp 903 is clamped in the first clamp arm, and part of it extends out of the first clamp arm to abut against one strip surface of the strip 1 to be measured. Part of the second clamp 904 is fixedly connected to the first clamp 903, and the other part extends to the other side to be measured and abuts against the other side of the strip 1, so that the suspended part 11 of the strip 1 can be fixed in the thickness direction of the strip 1. The first clamp 903 is also fixedly connected to the vibration guide plate 902, which is connected to the output end of the vibration source 2. In this way, the vibration force of the vibration source 2 can be transmitted to the base 300 and the suspended part 11 of the strip 1 at the same time. In this way, the suspended part 11 is clamped in the area of ​​the first clamp 903 and the second clamp 904 to form resonance, so that it can achieve relative stillness with the base 300, further simulating the use scenario of the superconducting coil 4. In this way, the area where the suspended part 11 is not clamped between the first clamp 903 and the second clamp 904 is collected.

[0085] In addition to applying vibration force through the clamping and fixing component 900 in the above-mentioned manner, the vibration source 2 can also be fixedly connected to the base 300, thereby applying vibration force through the base 300; in addition, the vibration source 2 can be directly connected to the suspended part 11 of the strip 1 to apply vibration force thereto; and other ways of applying vibration force by the vibration source 2 all fall within the scope of protection of this patent.

[0086] In the example shown in the figure, the test fixture 3 is placed on a vibration test bench for testing, and the vibration test bench can transmit vibration force to the strip 1 through the base 300; in the example shown in the figure, an exciting rod is used to directly contact the strip 1, thereby applying vibration force to the strip 1.

[0087] The fixing method of the strip 1, the moving method of the mobile end 100 and the locking method of the mobile end 100 are described below with reference to several different embodiments. Each of the following embodiments can be applied to the aforementioned embodiments alone or in combination.

[0088] Embodiment 1

[0089] This embodiment describes a specific method of fixing the end portion of the tape 1 and the bonding surface.

[0090] The test fixture 3 also includes a fixing component group 600 for extruding the two ends of the strip 1 to be tested to the second fitting surface 201a in the extrusion direction. The fixing component group 600 includes an extrusion block 601, a guide block 602 and a wedge block 603 distributed in sequence along the extrusion direction. The extrusion block 601 is opposite to the second fitting surface 201a, and the extrusion direction extends along the radial direction of the second pulling member. The guide block 602 is fixedly connected to the base 300 as a fixed support, and a guide cavity is formed between the guide block 602 and the extrusion block 601. In the height direction, the size of the guide cavity is gradually reduced from top to bottom. Specifically, the guide block 602 has a guide surface, and the guide surface extends from top to bottom in the extrusion direction gradually toward the side close to the extrusion block 601, and the wedge block 603 is adapted to the guide cavity.

[0091] During the installation process, the guide block 602 is first fixed to the base 300, and then the extrusion block 601 and the wedge block 603 are arranged along the extrusion direction. At this time, the extrusion block 601 is higher than the upper surface of the wedge block 603 and the guide block 602 in the height direction. After ensuring that the extrusion block 601 is opposite to the second fitting surface 201a, the wedge block 603 is pressed down. As the wedge block 603 sinks into the guide cavity, with the support of the guide block 602, the wedge block 603 can press the extrusion block 601 to the second pulling part 201 along the extrusion direction, thereby pressing the strip 1 to be tested to the second fitting surface 201a.

[0092] In the above solution, the extrusion block 601 may be made of a conductive material, so that it can achieve a conductive function while extruding and fixing the strip 1 .

[0093] In the above-mentioned embodiment, if the first pulling portion 101 also serves as one of the fixed ends 200 , the fixing component can also be fixedly connected with the first fitting surface 101 a in the same manner.

[0094] Optionally, the guide block 602 may not be provided but the base 300 body may have a guide structure. However, the way of providing the guide block 602 can facilitate the setting position of the fixed component and increase the adaptability of the test tool 3.

[0095] Optionally, a plurality of fixing assemblies are provided, thereby forming a plurality of fixing positions at each fixing end 200 .

[0096] Embodiment 2

[0097] This embodiment illustrates the locking method of the mobile terminal 100 and the base 300. The base 300 is provided with a slide groove 301, and the slide groove 301 forms an opening on the upper surface of the base 300. The first pulling member or the second pulling member of the mobile terminal 100 is partially located in the slide groove 301, and partially extends to the upper part of the slide groove 301 to be connected with the strip 1 accordingly.

[0098] In an example as shown in the figure, the slide groove 301 extends along the pulling direction and is located between the two second pulling parts 201; the pulling direction is perpendicular to the set reference direction. The first pulling part 101 is slidably adapted to the slide groove 301 and can be locked at the set position of the slide groove 301.

[0099] Of course, the sliding groove 301 may not be provided, but the first pulling member may be provided with a sliding arm, and the sliding arm may be slidably matched with the side wall of the base 300 . Those skilled in the art may make the selection according to their needs.

[0100] In a specific example, the first pulling part 101 is provided with a slider assembly 500, and the slider assembly 500 is located in the slide groove 301. The slider assembly 500 is connected to the first pulling part 101 through a connecting shaft 502, the top end of the connecting shaft 502 is located on the upper side of the first pulling part 101, and the bottom end thereof passes through the slider assembly 500 to the lower part thereof, and the slider assembly 500 and the first pulling part 101 are locked in the axial direction by a nut.

[0101] Furthermore, the slider assembly 500 includes two slider bodies 501, which are arranged axially up and down. The tail end of the connecting shaft 502 passes through the two slider bodies 501 to the lower side thereof in sequence, and the two slider bodies 501 and the first pulling part 101 can be locked axially by a nut.

[0102] In this embodiment, the wall of the slide groove 301 is provided with a convex plate 302, and the convex plate 302 is located between the two slider bodies 501 in the height direction. In this way, when the first pulling part 101 slides, the gap between the slider bodies 501 is relatively large. When the first pulling part 101 is in place, the two slider bodies 501 are locked by nuts to lock the two sliders to the convex plate 302. That is to say, in this embodiment, the slider assembly 500 is adapted with a locking member, and the locking member includes a connecting shaft 502 and a nut, and of course also includes other locking mechanisms, which can be selected by those skilled in the art. When the second pulling part 201 is used as the mobile end 100, the locking mechanism also adopts the same adaptation method to achieve the locking of the mobile end 100 and the base 300.

[0103] Embodiment 3

[0104] This embodiment illustrates the moving method of the mobile terminal 100 by way of example.

[0105] The testing tool 3 further includes a pulling component 400, and the pulling component 400 is fixedly connected to the mobile terminal 100. The pulling component 400 can be an electric pulling component 400 such as a motor, or a mechanical pulling component 400.

[0106] The structure of the mechanical pulling assembly 400 is supported by a specific implementation. The pulling assembly 400 includes a pulling rod 401 and a rotating rod 402 threadably matched with the pulling rod 401. The rotating rod 402 can rotate around the central axis of the pulling rod 401 to drive the pulling rod 401 to move along its axial direction.

[0107] Part of the pulling rod 401 is located in the slide slot 301, and part of the pulling rod 401 extends out of the slide slot 301 to the outside of the base 300. The rotating rod 402 cooperates with the part of the pulling rod 401 located outside the base 300. In order to limit the pulling rod 401 in the radial direction, a limiting plate is also covered at the mouth of the slide slot 301.

[0108] In another aspect of the present application, a method for testing a superconducting tape 1 is provided, which is adapted to a superconducting tape 1 testing tool 3, and the testing tool 3 also includes a pressure sensing device 700 and a voltage acquisition device 800, wherein the pressure sensing device 700 is used to test the tension on the mobile terminal 100, and the voltage acquisition device 800 is used to acquire the voltage of a set portion of the tested tape 1. In this embodiment, the voltage of the suspended portion 11 is acquired by a "four-lead method".

[0109] Specifically, the circuit connection method of the "four-lead method" is shown in the figure. #1 and #4 are connected to the current source through two excitation lines to form a current supply circuit, and #2 and #3 are connected to the nanovoltmeter through two detection lines to form a voltage detection circuit. The current supply circuit and the voltage detection circuit are independent of each other. Among them, the detection line needs to be connected to an extremely high impedance so that the detection current flowing through the nanovoltmeter is extremely small (approximately zero). The contact resistance at #1 and #4 is isolated from the supply line resistance and has no effect on the measurement result; although the contact resistance at #2 and #3 and the detection line resistance have an impact on the measurement result, the input impedance of the nanovoltmeter (in the order of MΩ) is much larger than the contact resistance and line resistance, so the impact is minimal and can be ignored. The Rs position shown in the figure is the detection length of the suspended part 11 of the strip 1. In the actual detection process, the suspended part 11 can be detected in sections to further improve the detection accuracy.

[0110] In this embodiment, the testing method of the superconducting tape 1 includes:

[0111] Step 1: Connect the strip material 1 to be tested to the fixed end 200 and the movable end 100 to form a suspended section.

[0112] Step 2: Adjust the mobile end 100 in the pulling direction until the pulling force on the mobile end 100 reaches a predetermined pulling force value. In this step, the position of the mobile end 100 can be adjusted by rotating the rotary rod 402 .

[0113] The mobile end 100 here can be the first pulling part 101 or the second pulling part 201. When obtaining the tension value of the mobile end 100, the pressure value of the mobile end 100 is obtained by the pressure sensing device 700. In the example shown in the figure, the pulling rod 401 is also provided with a stopper plate 403, and a pressure sensing device 700 is clamped between the stopper plate 403 and the first pulling part 101. The pressure sensing device 700 can also be arranged in other ways, such as a card machine to the base 300, etc. to adapt to the mobile end 100. The tension of the strip 1 to be tested is characterized by the tension value of the mobile end 100. In the example shown in the figure, the current is passed to the strip 1 to be tested by energizing the extrusion block 601. Then the voltage lead is connected. The voltage lead can be realized by setting a voltage lead block 801 on the base 300, and the voltage lead block 801 is set at the corner of the base 300 and opposite to the second bonding surface 201a.

[0114] Step 3: Power on the strip 1 to be tested, and start the vibration source 2 to drive the strip 1 to be tested to vibrate.

[0115] Step 4: While the strip 1 to be tested is vibrating, the voltage of a set portion of the strip 1 to be tested is collected.

[0116] In the above embodiment, in order to further simulate the working condition of the superconducting tape 1, the test fixture 3 is immersed in a low-temperature cooling medium before the test. Then the whole set of test fixture 3 is vibrated. In this case, the high-temperature superconducting tape 1 is passed with current and test voltage to determine the damage condition of the electrical performance of the high-temperature superconducting tape 1.

[0117] In a third aspect of the present application, another method for testing a superconducting tape 1 is provided, which is adapted to a superconducting tape 1 testing tool 3. The method for testing a superconducting tape 1 comprises:

[0118] Step 1: Connect the strip material 1 to be tested to the fixed end 200 and the movable end 100 to form a partially suspended strip material;

[0119] Step 2, adjusting the mobile end 100 in the pulling direction until the pulling force on the mobile end 100 reaches a predetermined pulling force value;

[0120] Step 3, powering on the strip 1 to be tested, and starting the vibration source 2 to drive the strip 1 to be tested to vibrate;

[0121] Step 4: During the vibration of the strip 1 to be tested, the voltage of a set portion of the strip 1 to be tested is collected;

[0122] Wherein, step 2 also includes:

[0123] Step 21: The clamping and fixing component 900 clamps a part of the suspended part 11, and the part clamped by the clamping and fixing component 900 is defined as a solid sealing simulation area, and the length of the solid sealing simulation area is adjustable.

[0124] That is to say, in the technical solution of the present application, before the strip 1 is energized and vibrated, a clamping and fixing assembly 900 is used to clamp the partially suspended portion to further simulate the working environment of the superconducting strip 1 .

[0125] In the above-mentioned embodiments, the connections of the various components of the test tool 3 can be threadedly connected by bolts, and Invar steel gaskets are provided at the positions of the various bolt connections to ensure that the positions of the various components will not shift with the changes in the ambient temperature of the tool.

[0126] Compared with the prior art, the advantages of this application are:

[0127] First, compared with the prior art regarding vibration and impact testing of the high-temperature superconducting coil 4, the present invention does not need to produce the entire high-temperature superconducting coil 4 for testing, but simulates the actual working condition of the weakest part of the high-temperature superconducting coil 4 separately, and then tests the separate strip 1, effectively saving time cost and expensive high-temperature superconducting material cost.

[0128] Second, by providing a movable end 100 for fixing the high-temperature superconducting tape 1, the vibration and impact test of the weak part of the high-temperature superconducting coil 4 under different tensions and suspension lengths can be simulated quickly and effectively.

[0129] Third, by providing an extrusion block 601 connected to an external current source and a voltage lead block 801, current can flow through the high-temperature superconducting tape 1 and the voltage can be accurately measured, so that the electrical properties of the high-temperature superconducting tape 1 can be measured while performing vibration and impact tests, thereby studying the relationship between the electrical properties of the high-temperature superconducting tape 1 and the vibration and impact loads.

[0130] Fourth, by providing an Invar steel gasket, the difference between the actual tension of the high-temperature superconducting tape 1 in a low-temperature test environment and the applied tension obtained by testing at room temperature does not exceed 10%.

[0131] Fifth, the suspended parts 11 of two high-temperature superconducting coils 4 can be simulated simultaneously, and the test efficiency is further improved.

[0132] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A superconducting tape testing tool, characterized in that: The invention comprises a base (300), a first pulling part (101) and two second pulling parts (201) fixed to the base (300), wherein the two second pulling parts (201) are used to fix two corresponding ends of a strip to be tested; the first pulling part (101) is used to abut against the position between the two ends of the strip to be tested; one of the second pulling part (201) and the first pulling part (101) is a movable end (100), and the other is a fixed end (200); the movable end (100) can move relative to the base (300) in a pulling direction to tighten the strip to be tested; the first pulling part (101) and the second pulling part (201) both have a fitting surface for abutting against the strip to be tested, and each fitting surface is spaced from the base (300).

2. The superconducting tape testing tool according to claim 1, characterized in that: The fitting surfaces of the first pulling portion (101) and the second pulling portion (201) are arc surfaces.

3. The superconducting tape testing tool according to claim 2, characterized in that: The bonding surface located at the first pulling portion (101) is defined as a first bonding surface (101a), and the bonding surface located at the second pulling portion (201) is defined as a second bonding surface (201a); In the pulling direction, the first laminating surface (101a) and the second laminating surface (201a) bulge in opposite directions, and both bulge in a direction away from each other.

4. The superconducting tape testing tool according to claim 3, characterized in that: The base (300) is provided with a slide groove (301), the slide groove (301) extends along the pulling direction and is located between the two second pulling parts (201); the first pulling part (101) is slidably adapted to the slide groove (301) and can be locked at a set position of the slide groove (301).

5. The superconducting tape testing tool according to claim 4, characterized in that: It also comprises a pulling component (400), wherein the pulling component (400) is fixedly connected to the mobile end (100).

6. The superconducting tape testing tool according to claim 5, characterized in that: The pulling assembly (400) comprises a pulling rod (401) and a rotating rod (402) threadably adapted to the pulling rod (401), wherein the rotating rod (402) is capable of rotating around the central axis of the pulling rod (401) to drive the pulling rod (401) to move along the pulling direction; Part of the pulling rod (401) is located in the sliding groove (301), and part of the pulling rod (401) extends out of the sliding groove (301) to the outside of the base (300), and the rotating rod (402) cooperates with the part of the pulling rod (401) located outside the base (300).

7. The superconducting tape testing tool according to claim 6, characterized in that: The first pulling portion (101) is provided with a slider assembly (500), and the slider assembly (500) is adapted to the slide groove (301); The slider assembly (500) comprises two slider bodies (501), the wall of the slide groove (301) is provided with a convex plate (302), and the convex plate (302) is located between the two slider bodies (501); The slider assembly (500) is adapted to be equipped with a locking piece, and the locking piece is used to lock the two slider bodies (501) to the convex plate (302).

8. The superconducting tape testing tool according to claim 6, characterized in that: It also includes a fixing component group (600) for pressing the two ends of the strip to be tested to the second fitting surface (201a) in the extrusion direction; the fixing component group (600) includes an extrusion block (601), a guide block (602) and a wedge block (603) distributed in sequence along the extrusion direction, and the extrusion block (601) is opposite to the second fitting surface (201a); A guide cavity is formed between the guide block (602) and the extrusion block (601); in the height direction, the size of the guide cavity gradually decreases from top to bottom, and the wedge block (603) is adapted to the shape of the guide cavity.

9. The superconducting tape testing tool according to any one of claims 1 to 8, characterized in that: It also comprises a vibration source (2), a pressure sensing device (700) and a voltage collection device (800), wherein the pressure sensing device (700) is used to test the tension exerted on the mobile end (100), and the voltage collection device (800) is used to collect the voltage of a set portion of the strip to be tested.

10. The superconducting tape testing tool according to claim 9, characterized in that: It also comprises a clamping and fixing assembly (900), one end of which is fixedly connected to the base (300), and the other end of which is used to clamp a set position of the strip to be tested.

11. A method for testing a superconducting tape, characterized in that: A testing tool adapted for the superconducting tape according to claim 9, wherein the testing method of the superconducting tape comprises: Step 1, connecting the strip to be tested to the fixed end (200) and the movable end (100) respectively to form a partially suspended strip; Step 2, adjusting the movable end (100) in the pulling direction until the pulling force applied to the movable end (100) reaches a predetermined pulling force value; Step 3, energize the strip to be tested and start the vibration source (2) to drive the strip to be tested to vibrate; Step 4: While the strip to be tested is vibrating, the voltage of a set portion of the strip to be tested is collected.

12. The method for testing a superconducting tape according to claim 11, characterized in that: The superconducting tape test fixture further comprises a clamping and fixing assembly (900), one end of the clamping and fixing assembly (900) being fixedly connected to the base (300), and the other end of the clamping and fixing assembly (900) being used to clamp a set position of a suspended portion (11) of the tape to be tested; The step 2 also includes: Step 21: The clamping and fixing assembly (900) clamps a part of the suspended portion (11) of the strip to be tested, and defines the area where the suspended portion (11) is clamped as a solid sealing simulation area. The length of the solid sealing simulation area is adjustable.

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