CN215219130U - High-temperature superconducting tape magnetic field angle dependence and torsion testing device - Google Patents
High-temperature superconducting tape magnetic field angle dependence and torsion testing device Download PDFInfo
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- CN215219130U CN215219130U CN202121214757.2U CN202121214757U CN215219130U CN 215219130 U CN215219130 U CN 215219130U CN 202121214757 U CN202121214757 U CN 202121214757U CN 215219130 U CN215219130 U CN 215219130U
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1238—Measuring superconductive properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- G01R33/1246—Measuring critical current
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Abstract
The utility model belongs to the technical field of the high temperature superconduction, concretely relates to high temperature superconduction strip magnetic field angle dependence and twist reverse testing arrangement. In the utility model, the upper supporting plate is connected with the lower supporting plate, the lower rotary table is fixed at the center of the lower supporting plate, the upper rotary table is arranged at the center of the upper supporting plate, the upper supporting plate is provided with a section of arc opening, and the upper rotary table is connected with the lower rotary table through the connecting rod; the lower pressing sheet and the upper pressing sheet are respectively arranged at the top of the lower rotating table and the bottom of the upper rotating table; the fixed rod is arranged on the upper rotating platform and is positioned above the upper supporting plate, the lower current lead is L-shaped, one end of the lower current lead is fixed on the lower rotating platform, and the other end of the lower current lead penetrates through the opening of the upper supporting plate and is fixed on the fixed rod or the fixed block; the lower surface of the upper supporting plate is provided with a triangular pull rod, and the background field magnet is fixedly connected with the upper supporting plate through the triangular pull rod. The utility model discloses be used for testing superconducting tape angle dependence and the strip under the external magnetic field and twist reverse the influence to critical current.
Description
Technical Field
The utility model belongs to the technical field of the high temperature superconduction, concretely relates to high temperature superconduction strip magnetic field angle dependence and twist reverse testing arrangement.
Background
When the temperature is lowered to a certain extent, the resistance of the material suddenly becomes zero or disappears, a phenomenon called superconducting phenomenon, in which the temperature is called critical transition temperature (T)c). Currently usually at Tc30K as the boundary between low temperature and high temperature superconduction, Tc< 30K is low temperature superconducting, TcMore than or equal to 30K is high-temperature superconductivity.
With the rapid development of high-temperature superconducting materials, the performance advantages of high operating temperature, current carrying capacity, critical magnetic field and the like of the second-generation REBCO high-temperature superconducting strip have great application prospects in the fields of energy, electric power, medicine, military industry and the like, and have been widely applied in the fields.
Compared with the conventional wire, the critical current of the high-temperature superconducting tape is one of important indexes for judging the quality of the high-temperature superconducting tape. The high-temperature superconducting strip is formed by mutually stacking different materials such as a superconducting layer, a substrate layer, a buffer layer, a copper layer and the like, and the coherence length and the penetration depth in each direction have different values, so that the high-temperature superconducting strip has obvious anisotropy. The macroscopic electromagnetic performance is characterized in that the strip material has different critical current characteristics under magnetic fields with different amplitudes and angles.
Meanwhile, when the high-temperature superconducting tape is used for preparing a cable, a conductor or a magnet, the tape is inevitably twisted correspondingly, and the current carrying capacity (critical current) of the superconducting tape is influenced to a certain extent, so that the critical current of the superconducting tape is reduced, and the normal operation of a related superconducting device is influenced.
The angle dependence and the influence of torsion of the high-temperature superconducting strip on critical current under an external magnetic field are indispensable parameters in the design and application of the superconducting magnet, the cable or the conductor. In the prior art, only the angle dependence of the high-temperature superconducting strip under different background fields can be tested, the critical performance of the high-temperature superconducting strip under torsion cannot be tested at the same time, and the angle dependence of the high-temperature superconducting strips with different torques under different background fields cannot be tested; or only the critical current under the torsion of the strip can be tested, and the influence of the change of the background field on the critical current cannot be tested.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a REBCO high temperature superconducting tape magnetic field angle dependence and twist reverse testing arrangement under liquid nitrogen environment for test superconducting tape twists reverse the influence to critical current at angle dependence and the strip under the external magnetic field, thereby provide more reliable experimental foundation for the design and the manufacturing of high temperature superconducting magnet, cable or conductor.
The utility model adopts the technical proposal that:
a high-temperature superconducting tape magnetic field angle dependence and torsion testing device comprises an upper supporting plate, a lower supporting plate, an upper rotary table, a lower current lead, a lower pressing sheet, an upper pressing sheet, a fixing rod and a background magnet; the upper supporting plate and the lower supporting plate are connected and fixed through a supporting rod and a nut, the lower rotary table is fixed in the center of the lower supporting plate through a screw, the upper rotary table is installed in the center of the upper supporting plate, a section of circular arc opening is formed in the upper supporting plate, and the upper rotary table and the lower rotary table are connected through a connecting rod to ensure rigid rotation during angle dependence measurement of the strip; the lower pressing sheet and the upper pressing sheet are respectively arranged at the top of the lower rotating table and the bottom of the upper rotating table and used for fixing a strip sample; the fixed rod is arranged on the upper rotating platform and is positioned above the upper supporting plate, the lower current lead is L-shaped, one end of the lower current lead is fixed on the lower rotating platform, the other end of the lower current lead passes through the opening of the upper supporting plate and is fixed on the fixed rod during angle dependence measurement, the fixed block is arranged on the upper supporting plate, and the other end of the lower current lead is fixed on the fixed block during torsion measurement; the lower surface of the upper supporting plate is provided with a triangular pull rod, and the background field magnet is fixedly connected with the upper supporting plate through the triangular pull rod.
During angle dependence measurement, the lower current lead moves in the circular arc opening track along with the change of the rotation angle.
The upper part of the upper rotating platform is provided with a rotating rod, and an upper current lead is arranged in a central opening at the top of the upper rotating platform and is tightly matched with the opening.
Go up the central point of backup pad and with central trompil coincidence position on install the calibrated scale, the angle change sign when the calibrated scale is used for testing.
The magnetic body with the background field is composed of a self-made separated high-temperature superconducting coil, and a symmetrical central area of the separated magnetic body can form a certain magnetic field uniform area for measuring the angle dependence of the magnetic field after being electrified.
The upper supporting plate, the lower supporting plate, the upper rotary table, the lower rotary table, the fixing rod, the fixing block, the lower pressing sheet and the upper pressing sheet are made of insulating epoxy resin.
The connecting rod material is non-magnetic aluminum alloy, and can avoid measurement errors caused by magnetization after electrification.
Compared with the prior art, the beneficial effects of the utility model reside in that:
(1) the utility model provides a high temperature superconducting tape angle dependence and twist reverse testing arrangement, provide even magnetic field through high temperature superconducting disconnect-type magnet to place high temperature superconducting tape in even field, through four lead wire methods and to the control of magnetic field size, thereby realize the influence that the magnetic field angle of tape or twist reverse tape critical current under different external magnetic fields changes;
(2) the utility model provides a high temperature superconducting tape angle dependence and twist reverse testing arrangement, the magnetic field direction of the even district of background magnet is perpendicular with the test sample of placing, easily realizes the regulation of magnetic field and strip surface angle, is favorable to testing the influence of vertical field to the strip performance;
(3) the utility model provides a high temperature superconducting tape angle dependence and twist reverse testing arrangement, in the separation clearance of background magnet, REBCO high temperature superconducting tape can be along with connecting rod etc. at 0 ~ 180 within range internal rotation, realizes the test of magnetic field angle dependence through changing the change of strip surface and magnetic field contained angle;
(4) the utility model provides a pair of high temperature superconducting tape angle dependence and twist reverse testing arrangement, the utility model discloses not only can test the angle dependence of high temperature superconducting tape under different external fields, can also test when having magnetic field or no magnetic field, twist reverse the influence to the strip material critical current.
Drawings
Fig. 1 is a schematic structural diagram of a device for testing the angle dependence and torsion of the magnetic field of a high-temperature superconducting tape provided by the present invention;
FIG. 2 shows an isometric view of the components involved in sample holding and power-on testing of the strip;
fig. 3 illustrates the four-lead measurement principle of the inventive device;
in the figure: 1-upper supporting plate, 2-lower supporting plate, 3-supporting rod, 4-upper rotating table, 5-lower rotating table, 6-rotating rod, 7-lower current lead, 8-upper current lead, 9-lower pressing sheet, 10-upper pressing sheet, 11-fixing rod, 12-magnet triangular pull rod, 13-connecting rod, 14-background magnet, 15-fixing block and 16-dial.
Detailed Description
The following describes the angle dependence and torsion testing apparatus for magnetic field of high temperature superconducting tape according to the present invention in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention is a device for testing angle dependence and torsion of magnetic field of high temperature superconducting tape, comprising: the device comprises an upper supporting plate 1, a lower supporting plate 2, an upper rotary table 4, a lower rotary table 5, a lower current lead 7, a fixing rod 11 and a background magnet 14;
the upper supporting plate 1 and the lower supporting plate 2 are connected and fixed with a nut through a supporting rod 3, the center of the lower supporting plate 2 is provided with a hole for installing a lower rotary table 5, and the lower rotary table 5 is fixed on the lower supporting plate 2 through a screw and used for torsion test of a strip; the center of the upper supporting plate 1 is also provided with a hole for installing the upper rotating table 4, the upper supporting plate 1 is provided with a 185-degree arc opening, as shown in fig. 2, the upper rotating table 4 is connected with the lower rotating table 5 through a connecting rod 13, and rigid rotation during angle dependence measurement of the strip material is ensured; the lower pressing sheet 9 and the upper pressing sheet 10 are respectively arranged at the top of the lower rotary table 5 and the bottom of the upper rotary table 4 and used for fixing a strip sample; the fixed rod 11 is arranged on the upper rotating platform 4 and is positioned above the upper supporting plate 1, the lower current lead 7 is L-shaped, one end of the lower current lead is fixed on the lower rotating platform 5 through a screw, the other end of the lower current lead passes through the opening of the upper supporting plate 1 and is fixed on the fixed rod 11 during angle dependence measurement, and the lower current lead 7 moves in an arc track along with the change of a rotating angle during angle dependence measurement; the upper part of the upper rotary table 4 is provided with a rotary rod 6, and an upper current lead 8 is arranged in a central opening at the top of the upper rotary table 4 and is tightly matched with the opening.
The upper supporting plate 1 is provided with a fixing block 15, and the other end of the lower current lead 7 is fixed on the fixing block 15 during a torsion test;
the lower rotary table 5 is provided with a groove and a screw hole for fixing a lower current lead 7, a pressing sheet 9 and a screw hole for connecting the groove of the upper rotary table 4 and fixing the superconducting strip, and the like; the dial 16 is used for marking the angle change during the test, is arranged at the central position of the upper supporting plate 1 and is superposed with the central opening.
The lower surface of the upper supporting plate 1 is provided with a triangular pull rod 12, a background field magnet 14 is fixedly connected with the upper supporting plate 1 through the triangular pull rod 12, the background field magnet 14 is composed of a self-made separation type high-temperature superconducting coil, and a symmetrical central area of the separation magnet can form a certain magnetic field uniform area for measuring the angle dependence of the magnetic field after being electrified.
The upper supporting plate 1, the lower supporting plate 2, the upper rotary table 4, the lower rotary table 5, the fixing rod 11, the fixing block 15, the lower pressing sheet 9 and the upper pressing sheet 10 are made of insulating epoxy resin.
The connecting rod 13 is made of nonmagnetic aluminum alloy, so that the measurement error caused by magnetization after electrification can be avoided.
The 16 scales of the dial are 0-360 degrees, and the minimum scale is 1 degree.
A method of magnetic field angle dependence and torsion testing, comprising the steps of:
step 1: before the magnetic field is used for the first time, the Hall sensor probe is used for marking the magnetic field size of the uniform area of the background magnet 14 at low temperature (liquid nitrogen), and the current size required by different magnetic field strengths is recorded. So as to clearly specify the background magnetic field under the current during the test.
Angle dependence test of the strip under an external magnetic field:
step 2: the REBCO high-temperature superconducting strip sample is arranged on the current leads of the upper rotary table 4 and the upper rotary table 5 through the lower pressing plate 9, the upper pressing plate 10 and screws, so that two ends of the sample are respectively compacted (well contacted) with the lower current lead 7 and the upper current lead 8, and the strip has certain tensile stress and is in a vertical state.
And step 3: voltage leads are led out at certain positions away from two ends of the pressure joint of the sample and the current lead, as shown in fig. 3, the lower end of a connecting rod 13 connecting the upper rotary table 4 and the lower rotary table 5 is inserted into a groove of the lower rotary table 5, and the upper end of the connecting rod is fixed on the upper rotary table 4.
And 4, step 4: after the above steps are completed, the power line is connected with the lower current lead 7 and the upper current lead 8, and the power line is placed in a liquid nitrogen dewar and cooled to a superconducting state. The sample strip is then positioned at the specified magnetic field angle by manually rotating the rotating rod 6.
And 5: the current source energizes the background field magnet 14 to a specified magnetic field to achieve a uniform magnetic field, at which point the strip sample is energized via the power line to begin the test. In the testing process, the angle between the strip and the magnetic field is adjusted through the rotating rod 6 according to the requirement of the testing angle to be measured (the angle is judged according to the dial 16), after a piece of specified background field data is tested, the magnetic field of the background field magnet 14 can be adjusted, and the next group of data is measured.
Torsion testing:
step 6: if the strip is simply subjected to the torsion test in a torsion or magnetic field, it can be performed as described in steps 2 to 5. It should be noted that: the step of using the connecting rod 13 in step 3 is not required here; in addition, it is necessary to fix the lower rotary table 5 to the lower support plate 2 and fixedly connect the upper end of the lower current lead 7 to the fixing block 15 of the upper support plate 1.
And 7: if the angle dependence of the strip under the external field needs to be tested firstly, and then the torsion or the critical current of the strip under the external field needs to be tested, after the step 5 is completed, the testing part is lifted out of the Dewar tank, the lower rotary table 5 is fixed, the connecting rod 13 is taken down, the lower current lead 7 is fixed on the fixed block 15 again, and the strip is placed back into the Dewar and executed according to the step 5.
Particularly, the angle dependence performance under the external magnetic field can meet the test of 0-180 degrees, and the strip torsion test can meet the test of any angle.
The above description is only the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept thereof equally within the technical scope disclosed in the present invention, and all the modifications should be covered within the protection scope of the present invention.
Claims (7)
1. A high temperature superconducting tape magnetic field angle dependence and torsion testing device is characterized in that: comprises an upper supporting plate (1), a lower supporting plate (2), an upper rotary table (4), a lower rotary table (5), a lower current lead (7), a lower pressing sheet (9), an upper pressing sheet (10), a fixing rod (11) and a background field magnet (14); the upper supporting plate (1) and the lower supporting plate (2) are connected and fixed with a nut through a supporting rod (3), the lower rotary table (5) is fixed at the center of the lower supporting plate (2) through a screw, the upper rotary table (4) is installed at the center of the upper supporting plate (1), a section of circular arc opening is formed in the upper supporting plate (1), the upper rotary table (4) is connected with the lower rotary table (5) through a connecting rod (13), and rigid rotation during measurement of angle dependence of a strip material is guaranteed; the lower pressing sheet (9) and the upper pressing sheet (10) are respectively arranged at the top of the lower rotating table (5) and the bottom of the upper rotating table (4) and used for fixing a strip sample; the fixing rod (11) is arranged on the upper rotating platform (4) and is positioned above the upper supporting plate (1), the lower current lead (7) is L-shaped, one end of the lower current lead is fixed on the lower rotating platform (5), the other end of the lower current lead passes through an opening of the upper supporting plate (1) and is fixed on the fixing rod (11) during angle dependence measurement, a fixing block (15) is arranged on the upper supporting plate (1), and the other end of the lower current lead (7) is fixed on the fixing block (15) during torsion test; the lower surface of the upper supporting plate (1) is provided with a triangular pull rod (12), and the background field magnet (14) is fixedly connected with the upper supporting plate (1) through the triangular pull rod (12).
2. The device for testing the angle dependence and torsion of the magnetic field of the high-temperature superconducting tape according to claim 1, wherein: during angle-dependent measurement, the lower current lead (7) moves in the circular arc opening track along with the change of the rotation angle.
3. The device for testing the angle dependence and torsion of the magnetic field of the high-temperature superconducting tape according to claim 1, wherein: the upper part of the upper rotating platform (4) is provided with a rotating rod (6), and an upper current lead (8) is arranged in a central opening at the top of the upper rotating platform (4) and is tightly matched with the opening.
4. The device for testing the angle dependence and torsion of the magnetic field of the high-temperature superconducting tape according to claim 1, wherein: go up the central point of backup pad (1) and install calibrated scale (16) with central trompil coincidence position on, angle change sign when calibrated scale (16) are used for testing.
5. The device for testing the angle dependence and torsion of the magnetic field of the high-temperature superconducting tape according to claim 1, wherein: the background field magnet (14) is composed of a self-made separation type high-temperature superconducting coil, and a symmetrical central area of the separation magnet can form a certain magnetic field uniform area for measuring the angle dependence of the magnetic field after being electrified.
6. The device for testing the angle dependence and torsion of the magnetic field of the high-temperature superconducting tape according to claim 1, wherein: the material of the upper supporting plate (1), the lower supporting plate (2), the upper rotary table (4), the lower rotary table (5), the fixing rod (11), the fixing block (15), the lower pressing sheet (9) and the upper pressing sheet (10) is insulating epoxy resin.
7. The device for testing the angle dependence and torsion of the magnetic field of the high-temperature superconducting tape according to claim 1, wherein: the connecting rod (13) is made of nonmagnetic aluminum alloy, so that the measurement error caused by magnetization after electrification can be avoided.
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| CN202121214757.2U Active CN215219130U (en) | 2020-10-26 | 2021-06-01 | High-temperature superconducting tape magnetic field angle dependence and torsion testing device |
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| CN113359072A (en) * | 2020-10-26 | 2021-09-07 | 核工业西南物理研究院 | Device and method for testing angle dependence and torsion of magnetic field of high-temperature superconducting tape |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115265415B (en) * | 2022-08-03 | 2024-06-04 | 核工业西南物理研究院 | High-temperature superconducting strand torsion angle detection and control mechanism and method |
| CN115308653B (en) * | 2022-08-05 | 2024-05-24 | 苏州八匹马超导科技有限公司 | Sample cooling device for performance test of high-temperature superconducting material |
| CN115980641A (en) * | 2023-03-20 | 2023-04-18 | 中国科学院合肥物质科学研究院 | System and method for testing critical current of super-conduction band material under complex stress and magnetic field |
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| CN106546838B (en) * | 2016-09-22 | 2023-09-01 | 西南交通大学 | Device and method for measuring critical current characteristics of high-temperature superconducting strip |
| CN107884731B (en) * | 2016-09-30 | 2021-10-01 | 中国电力科学研究院 | Torsion type superconducting tape critical current detection device |
| CN111521213A (en) * | 2017-11-20 | 2020-08-11 | 侯苏华 | Sensor testing device and method |
| EP3671247A1 (en) * | 2018-12-19 | 2020-06-24 | Bruker HTS GmbH | Method for evaluating the electrical properties of a hts superconductor |
| CN113359072A (en) * | 2020-10-26 | 2021-09-07 | 核工业西南物理研究院 | Device and method for testing angle dependence and torsion of magnetic field of high-temperature superconducting tape |
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| CN113359072A (en) * | 2020-10-26 | 2021-09-07 | 核工业西南物理研究院 | Device and method for testing angle dependence and torsion of magnetic field of high-temperature superconducting tape |
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