CN114167182B - Device for testing cyclic bending and current-carrying characteristics of liquid helium temperature zone of superconducting strip - Google Patents
Device for testing cyclic bending and current-carrying characteristics of liquid helium temperature zone of superconducting strip Download PDFInfo
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- CN114167182B CN114167182B CN202111475302.0A CN202111475302A CN114167182B CN 114167182 B CN114167182 B CN 114167182B CN 202111475302 A CN202111475302 A CN 202111475302A CN 114167182 B CN114167182 B CN 114167182B
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- 238000005452 bending Methods 0.000 title claims abstract description 31
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 26
- 239000001307 helium Substances 0.000 title claims abstract description 26
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 125000004122 cyclic group Chemical group 0.000 title claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 151
- 239000010949 copper Substances 0.000 claims abstract description 151
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 148
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims description 48
- 238000002955 isolation Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims 1
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Particle Accelerators (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device for testing cyclic bending and current-carrying characteristics of a high-temperature superconductive strip in a liquid helium temperature zone. The device consists of a transmission device, a conductive device, a heat insulation layer and a basic framework, wherein the transmission device is a core part. The transmission device comprises a motor, a motor connecting shaft, a coupler, a worm, a turbine, a rotating shaft, a rotating platform base plate and a spur gear. The motor connecting axle both ends link to each other with motor and worm through the shaft coupling, and the motor will drive worm turbine and rotate, and first revolving stage base plate links to each other with the turbine through first rotation axis, and first spur gear and second spur gear link to each other with first revolving stage base plate and second revolving stage base plate through second rotation axis and third rotation axis, and the strip is pressed between copper clamp plate and the G10 briquetting on two revolving stage base plates, and consequently the rotation of turbine can make first revolving stage base plate and second revolving stage base plate take place counter-rotating, and then drives the strip and take place to crookedly. By measuring the voltage and the current at the two ends of the strip, the critical current of the strip under the bending radius can be obtained according to the U-I curve.
Description
Technical Field
The invention relates to the technical field of superconducting material performance measurement and test, in particular to a device for testing the circulating bending and current carrying characteristics of a high-temperature superconducting strip under a liquid helium temperature zone, which is used for testing the current performance of the superconducting strip under the circulating bending under the liquid helium temperature zone.
Background
The high-temperature superconducting material has wide application prospect in the fields of superconducting cables, high-field magnets, accelerators and the like due to the advantages of high critical temperature, high critical magnetic field, high current carrying capacity and the like. In practical application, the superconductive strip often generates repeated bending for many times, the bending of the strip can reduce the current carrying performance of the strip and even lead to the quenching of the strip, and fatigue failure can occur after the strip is bent for many times, so that the current carrying performance of the strip after fatigue bending is required to be tested.
The existing critical current measurement mode of the strip is not very complicated by only changing the shape of the strip and placing the strip on a sample rod for performance test, but is very complicated and difficult for testing the current carrying performance after fatigue times of hundreds of thousands of times. The artificial bending is difficult to control the stress, so that the strip is automatically circularly bent, and the current carrying performance of the strip under the circulation times can be measured in real time, thereby being beneficial to further exploring the performance of the high-temperature superconductive strip to promote the development of the strip in various fields.
Disclosure of Invention
The invention aims to provide a device for testing cyclic bending and current carrying characteristics of a high-temperature superconductive strip in a liquid helium temperature zone. The belt material can be remotely controlled to be circularly bent in the Dewar through the transmission device in the device, and the belt material can be electrified through the conductive device and the critical current of the belt material can be tested, so that the integration of the circular bending and the current-carrying performance test of the belt material can be realized through the device.
The technical scheme of the invention is as follows:
a device for testing cyclic bending and current-carrying characteristics of a high-temperature superconductive strip in a liquid helium temperature zone comprises a transmission device, a conductive device, a heat insulation layer and a basic framework;
the transmission device comprises a motor, a motor connecting shaft, a coupler, a worm, a turbine, a first rotating shaft, a second rotating shaft, a first rotating platform substrate, a second rotating platform substrate, a first spur gear and a second spur gear;
two ends of the motor connecting shaft are respectively connected with the motor and the worm through a coupler; the worm wheel and the worm are mutually coupled; the first rotary table substrate is connected with the turbine through a first rotary shaft; the first spur gear is connected with the first rotary table base plate through a second rotary shaft; the second spur gear is connected with the second rotary table base plate through a third rotary shaft;
the first G10 pressing block and the first copper pressing plate are arranged on the first rotating table substrate, and the first G10 pressing block is arranged between the first rotating table substrate and the first copper pressing plate; the second G10 pressing block is arranged between the second rotary table substrate and the second copper pressing plate; the strip passes through the middle parts of the two copper pressing plates and the two G10 pressing blocks, the first copper pressing plate presses the middle part of the strip onto the first G10 pressing block, and the second copper pressing plate presses the middle part of the strip onto the second G10 pressing block;
the first spur gear and the second spur gear are mutually coupled, so that the first rotary table substrate can drive the second rotary table substrate to rotate simultaneously; thereby bending the strip.
The conductive device comprises a copper pipe, a copper braid belt, a first copper lead plate, a second copper lead plate, a first copper pressing plate and a second copper pressing plate, and is used for electrifying the strip; the copper pipe is externally connected with a current lead, and the bottom of the copper pipe is connected with a copper braid belt; the first copper lead plate is mounted on a first G10 pad and the second copper lead plate is mounted on a second G10 pad. The copper braid is secured over two copper lead plates. The two ends of the strip are respectively fixed between two copper lead plates and two G10 backing plates.
The heat insulating layer is formed by stacking a plurality of layers of heat insulating materials and is arranged between the first middle isolation plate and the cover plate for reducing leakage of liquid helium.
The foundation framework comprises stainless steel pipes, a cover plate, a first middle isolation plate, a second middle isolation plate, a bottom plate, an eye bolt, a first G10 base plate, a second G10 base plate, a first G10 pressing block, a second G10 pressing block, a first side plate, a second side plate, a third side plate, a fourth side plate, a limiting block and a copper pipe insulating sleeve, and is used for fixing the whole device. The two ends of the stainless steel tube are respectively connected with the bottom plate and the cover plate, so that the whole device is fixed; the eye bolts are arranged on the cover plate and used for connecting a travelling crane to move the device; the first side plate, the second side plate, the third side plate, the fourth side plate, the first G10 backing plate and the second G10 backing plate are all arranged on the bottom plate; the copper pipe insulating sleeve is arranged between the copper pipe and the cover plate; one end of the limiting block is fixed on the first side plate, and the other end of the limiting block is used for limiting the worm to prevent the worm from transversely shaking.
The motor is mounted on the cover plate, and the motor connecting shaft traverses the first intermediate partition plate and the second intermediate partition plate.
The G10 pressing block is arranged between the rotary table substrate and the copper pressing plate and used for insulating between the copper pressing plate and the rotary table substrate.
The G10 briquette is a plate made of G10 material. The G10 backing plate is a plate made of G10 material.
Further, two ends of the motor connecting shaft are connected with the motor and the worm through the shaft coupling, so that the motor drives the worm to rotate and further drives the turbine to rotate, the first rotating table substrate is connected with the turbine through the first rotating shaft, the first spur gear and the second spur gear are respectively connected with the first rotating table substrate and the second rotating table substrate through the second rotating shaft and the third rotating shaft, and the two rotating table substrates are respectively provided with a G10 pressing block and a copper pressing plate; the strip is pressed between the copper pressing plate and the G10 pressing block, so that the rotation of the turbine can enable the first rotating table substrate and the second rotating table substrate to reversely rotate, and further the strip is driven to bend.
Further, the turbine is mounted between the first side plate and the second side plate through a first rotation shaft; the worm is matched with the turbine, one end of the worm is connected with the coupler, and the other end of the worm is arranged on the bottom plate through the oil-free shaft sleeve.
Further, the first rotary table substrate is mounted between the second side plate and the third side plate through a first rotary shaft and a second rotary shaft; the second turntable substrate is mounted between the second side plate and the fourth side plate through a third rotation shaft and a fourth rotation shaft.
Further, the first spur gear is connected with the first rotary table base plate through a second rotary shaft; the second spur gear is connected with the second rotary table base plate through a third rotary shaft; the first spur gear and the second spur gear are mutually coupled, so that the first rotary table substrate can drive the second rotary table substrate to rotate simultaneously.
Further, the first side plate, the second side plate, the third side plate and the fourth side plate are fixed on the bottom plate through screws.
Further, one end of the limiting block is fixed on the first side plate through a screw, and the other end of the limiting block is used for limiting the worm to prevent the worm from transversely shaking.
Further, a square small groove is formed above the cover plate and used for mounting and fixing the motor.
Further, the copper pipe is externally connected with a current lead, the bottom of the copper pipe is connected with a copper braid belt, the bottom of the copper pipe is provided with a square plate, and the square plate is provided with four small holes for installing the copper pipe on the second middle isolation plate. The copper pipe has an outer diameter of 10mm and a wall thickness of 1.5mm, and can bear 400A of current.
Further, the copper pipe insulating sleeve is arranged between the copper pipe and the cover plate and used for insulating between the copper pipe and the cover plate.
Further, the oilless shaft sleeve is respectively arranged between the motor connecting shaft and the middle isolation plate and between the worm and the bottom plate and used for reinforcing the fixation of the worm and the motor connecting shaft.
Further, the G10 press block is installed between the rotary table substrate and the copper press plate, and is used for insulation between the copper press plate and the rotary table substrate.
Further, the G10 pad is mounted between the base plate and the copper lead plate for insulation between the base plate and the copper lead plate.
Further, the copper lead plate is arranged on the G10 backing plate and used for connecting the copper braid and fixing two ends of the strip. If the copper braid is directly connected with the copper pressing plate, the phenomenon that the copper braid shakes can occur in the rotating process of the copper pressing plate, the instability of the device is increased, therefore, the copper lead plate is increased, the copper lead plate cannot swing, and the copper braid can be stably fixed above. The two ends of the strip material pass through the gap between the copper pressing plate and the G10 pressing block and are fixed between the copper lead plate and the G10 backing plate.
Further, the heat insulating layer is installed between the first intermediate partition plate and the cover plate, each layer is 40mm thick, and each layer is 5mm apart, and the total is 10 layers. The radius of the heat insulating layer and the middle isolation plate are 290mm, compared with Du Waxiao mm matched with the heat insulating layer, the leakage of liquid helium can be greatly reduced, and the cost is saved.
Further, the eye bolts are arranged on the cover plate and are used for connecting a traveling crane; because the device is large in size and has a height of 1.6m, the device needs to be placed in the Dewar through traveling crane.
Further, 20mm above the bottom plate is a low temperature zone, which is immersed in liquid helium during testing. The device in the low temperature area comprises a worm, a turbine, a rotating shaft, a rotating platform substrate, a spur gear, copper braid belts, copper lead plates, copper pressing plates, a base plate, a G10 backing plate, a G10 pressing block, a side plate, a limiting block and an oil-free shaft sleeve in a transmission device, wherein the copper braid belts, the copper lead plates and the copper pressing plates are arranged in a conductive device, and the base plate, the G10 backing plate, the G10 pressing block, the side plate, the limiting block and the oil-free shaft sleeve are arranged in a basic framework. The low temperature area is the core area of the device, the strip is fixed in the area, and the bending of the strip is controlled by a motor; by measuring the voltage and the current through the bent portion of the strip, the critical current of the strip can be measured based on quench criteria.
Compared with the prior art, the invention has the beneficial effects that:
the device can realize liquid helium environment test, and the top end of the device is provided with the cover plate which can be matched with the low-temperature Dewar.
The device can realize automatic circulating bending of the strip, and is more accurate in controlling the strain of the strip.
The device can realize automatic cyclic bending of the long-distance strip, and after the critical current of the strip subjected to fatigue bending for a certain number of times is measured, the motor can be started again to measure the next group of data, namely, a plurality of groups of data can be measured by one flow.
Drawings
FIGS. 1, 2 and 3 show the low temperature zone in the apparatus of the present invention;
fig. 4 is an overall view of the device.
In the drawing the view of the figure,
101-motor, 102-motor connecting shaft, 103-coupling, 104-worm, 105-turbine, 1061-first rotating shaft, 1062-second rotating shaft, 1063-third rotating shaft, 1064-fourth rotating shaft, 1071-first rotating table substrate, 1072-second rotating table substrate, 1081-first spur gear, 1082-second spur gear;
201-copper pipe, 202-copper braid, 2031-first copper lead plate, 2032-second copper lead plate, 2041-first copper press plate, 2042-second copper press plate;
300-a heat insulating layer;
401-stainless steel tube, 402-cover plate, 4031-first middle isolation plate, 4032-second middle isolation plate, 404-bottom plate, 405-eye bolt, 4061-first G10 pad, 4062-second G10 pad, 4071-first G10 press block, 4072-second G10 press block, 4081-first side plate, 4082-second side plate, 4083-third side plate, 4084-fourth side plate, 409-stopper, 410-oilless sleeve, 411-copper pipe insulating sleeve.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the prior art, the drawings that are used in the description of the prior art and embodiments will be briefly described below.
The invention discloses a device for testing cyclic bending and current-carrying characteristics of a superconducting tape in a liquid helium temperature zone, which comprises a transmission device, a conductive device, a heat insulation layer 300 and a basic framework, wherein the transmission device is shown in figures 1-4. According to one embodiment of the present invention, as shown in fig. 1 and 2, a stainless steel tube 401 and a copper braid 202 are hidden for viewing for the low temperature zone view in the device of the present invention. FIG. 3 is a cross-sectional view of the low temperature zone of the apparatus of the present invention. The means of low temperature zone comprises worm 104, worm gear 105, first rotation shaft 1061, second rotation shaft 1062, third rotation shaft 1063, fourth rotation shaft 1064, first rotation table base 1071, second rotation table base 1072 and first spur gear 1081, second spur gear 1082, copper braid 202, first copper lead plate 2031, second copper lead plate 2032, first copper pressure plate 2041 and second copper pressure plate 2042 in the electrically conductive means, and also base plate 404, first G10 pad 4061, second G10 pad 4062, first G10 pad 4071, second G10 pad 4072, first side plate 4081, second side plate 4082, third side plate 4083, fourth side plate 4084, stopper 409 and oilless bushing 410 in the basic skeleton. In the invention, the G10 pressing block is a plate made of G10 material. The G10 backing plate is a plate made of G10 material.
The elements of the transmission, the conductive device, the insulating layer 300 and the basic skeleton are mutually inserted, the whole device is fixedly connected through four stainless steel pipes 401 in the basic skeleton, and the whole device is pre-tightened by nuts.
The conductive device is used for electrifying the strip and comprises a copper pipe 201, a copper braid 202, a copper lead plate 203 and a copper pressing plate 204. One end of the copper tube 201 in the conductive device passes through the cover plate 402 to be externally connected with a power supply, and the other end passes through the second middle isolation plate 4032 to be connected with the copper braid 202. The copper braid 202 is bolted onto both copper lead plates. The first G10 pressing block (4071) is arranged between the first rotary table substrate (1071) and the first copper pressing plate (2041); the second G10 pressing block (4072) is arranged between the second rotary table substrate (1072) and the second copper pressing plate (2042); the strip passes through the middle of the two copper pressing plates and the two G10 pressing blocks, the first copper pressing plate (2041) presses the middle part of the strip onto the first G10 pressing block (4071), and the second copper pressing plate (2042) presses the middle part of the strip onto the second G10 pressing block (4072).
The first copper lead plate 2031 is mounted on the first G10 pad 4061 and the second copper lead plate 2032 is mounted on the second G10 pad 4062 for connecting the copper braid 202 and the fixing strap at both ends.
The motor 101 in the transmission device is installed on the cover plate 402, the motor connecting shaft 102 traverses the first middle isolation plate 4031 and the second middle isolation plate 4032, two ends of the motor connecting shaft 102 are respectively connected with the motor 101 and the worm 104 through the coupler 103, and the worm wheel 105 and the worm 104 are mutually coupled, so that the motor 101 drives the worm 104 to rotate, and then drives the worm wheel 105 to rotate, and the first rotary table base plate 1071 is connected with the worm wheel 105 through the first rotary shaft 1061. The first spur gear 1081 is coupled to the first rotary table base 1071 by a second rotary shaft 1062. The second spur gear 1082 is coupled to the second rotary table base 1072 by a third rotary shaft 1063.
A first G10 press block 4071 and a first copper press plate 2041 are fixed on the first rotary table substrate 1071, and a second G10 press block 4072 and a second copper press plate 2042 are fixed on the second rotary table substrate 1072; the first G10 compact 4071 is mounted between the first rotary table substrate 1071 and the first copper platen 2041; the second G10 compact 4072 is mounted between the second turntable substrate 1072 and the second copper platen 2042; the strip passes between the two copper platens and the two G10 press blocks, the first copper platen 2041 presses the strip middle against the first G10 press block 4071 and the second copper platen 2042 presses the strip middle against the second G10 press block 4072.
The first spur gear 1081 and the second spur gear 1082 are coupled to each other. Both copper pressing plates and both G10 pressing blocks are fixed on the turntable substrate, so that the rotation of the turbine 105 can reversely rotate the first turntable substrate 1071 and the second turntable substrate 1072, and further drive the strip to bend.
The first G10 compact 4071 is installed between the first rotary table substrate 1071 and the first copper pressing plate 2041 for insulation between the first copper pressing plate 2041 and the first rotary table substrate 1071; the second G10 compact 4072 is mounted between the second turntable substrate 1072 and the second copper platen 2042 for insulation between the second copper platen 2042 and the second turntable substrate 1072. The first G10 pad 4061 is mounted between the base plate 404 and the first copper wiring board 2031 for insulation between the base plate 404 and the first copper wiring board 2031; the second G10 pad 4062 is mounted between the base plate 404 and the second copper lead plate 2032 for insulation between the base plate 404 and the second copper lead plate 2032.
The turbine 105 is mounted between the first side plate 4081 and the second side plate 4082 by a first rotation shaft 1061. The worm 104 is matched with the turbine 105, one end of the worm is connected with the coupler 103, and the other end of the worm is arranged on the bottom plate 404 through the oilless shaft sleeve 410.
The first turntable substrate 1071 is mounted between the second side plate 4082 and the third side plate 4083 through a first rotation shaft 1061 and a second rotation shaft 1062. The second turntable substrate 1072 is mounted between the second side plate 4082 and the fourth side plate 4084 through the third rotation shaft 1063 and the fourth rotation shaft 1064.
The insulation layer 300 is installed between the first intermediate separator 4031 and the cover plate 402, each layer being 40mm thick, each layer being 5mm apart for a total of 10 layers.
The two ends of the stainless steel tube 401 in the basic framework are respectively connected with the bottom plate 404 and the cover plate 402, so that the whole device is fixed. An eye bolt 405 is mounted on the cover plate 402 for connection to a crane for moving the device. The first side plate 4081, the second side plate 4082, the third side plate 4083, the fourth side plate 4084, the first G10 pad 4061, and the second G10 pad 4062 are all mounted on the bottom plate 404. The first side plate 4081, the second side plate 4082, the third side plate 4083 and the fourth side plate 4084 are fixed on the bottom plate 404 by screws. The third side plate 4083 and the fourth side plate 4084 are adjacently placed, and the first side plate 4081 and the second side plate 4082 are placed in parallel front-rear. A copper tube insulating sleeve 411 is installed between the copper tube 201 and the cover plate 402 for insulation between the copper tube 201 and the cover plate 402.
One end of the limiting block 409 is fixed on the first side plate 4081 through a screw, and the other end of the limiting block is used for limiting the worm 104, so that the worm 104 is prevented from transversely shaking.
Fig. 4 is an overall view of the device with the low temperature zone at the very bottom of the device, including 20mm above and at the bottom plate 404. During testing, after the device is placed in the liquid helium vessel, the area will be immersed in liquid helium. Above the low temperature zone is a second intermediate spacer 4032 on which copper tubing 201 is secured. The first intermediate separator 4031 and the second intermediate separator 4032 have a function of reducing evaporation of liquid helium and function as a stabilizing structure with the stainless steel tube 401 traversing both. The insulating layer 300 is above the first intermediate separator 4031, followed by a cover plate 402, on which cover plate 402 the motor 101 and the eye bolt 405 are mounted, the eye bolt 405 being used to circumscribe the crane to move the device into the cryogenic container. A square small groove is formed above the cover plate 402 and is used for mounting and fixing the motor 101. Because the device is large in size and has a height of 1.6m, the device needs to be placed in the Dewar through traveling crane.
The copper pipe 201 is externally connected with a current lead, the bottom of the copper pipe 201 is connected with a copper braid 202, a square plate is arranged at the bottom of the copper pipe 201, and four small holes are formed in the square plate and used for installing the copper pipe 201 on the second middle isolation plate 4032. The copper pipe 201 has an outer diameter of 10mm and a wall thickness of 1.5mm, and can bear 400A of current.
The oilless bushing 410 is installed between the motor connection shaft 102 and the intermediate partition plate, and between the worm 104 and the bottom plate 404, respectively, for reinforcing the fixation of the worm 104 and the motor connection shaft 102.
In the use of the device, the two ends of the strip are first fixed between the copper lead plates on both sides and the G10 backing plate, and the copper braid 202 is fixed on the two copper lead plates respectively by bolts. Then the middle of the strip is fixed between the two copper pressing plates and the two G10 pressing blocks, and the strip is installed. The whole device is placed in a low-temperature container, a power supply is connected to the copper pipe 201, and the motor 101 is started to test the bending and critical current of the strip.
While the foregoing has been described in relation to illustrative embodiments thereof, so as to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, but is to be construed as limited to the spirit and scope of the invention as defined and defined by the appended claims, as long as various changes are apparent to those skilled in the art, all within the scope of which the invention is defined by the appended claims.
Claims (10)
1. A device for testing cyclic bending and current-carrying characteristics of a high-temperature superconductive strip material in a liquid helium temperature zone is characterized in that: comprises a transmission device, a conductive device, a heat insulation layer (300) and a basic framework; wherein,,
the transmission device comprises a motor (101), a motor connecting shaft (102), a coupler (103), a worm (104), a turbine (105), a first rotating shaft (1061), a second rotating shaft (1062), a first rotating table base plate (1071), a second rotating table base plate (1072), a first spur gear (1081) and a second spur gear (1082); two ends of a motor connecting shaft (102) are respectively connected with a motor (101) and a worm (104) through a coupler (103); the turbine (105) and the worm (104) are mutually coupled; the first rotary table base plate (1071) is connected to the turbine (105) through a first rotary shaft (1061); the first spur gear (1081) is connected with the first rotary table base plate (1071) through a second rotary shaft (1062); the second spur gear (1082) is connected with the second rotary table base plate (1072) through a third rotary shaft (1063);
a first G10 pressing block (4071) and a first copper pressing plate (2041) are arranged on the first rotary table substrate (1071), and the first G10 pressing block (4071) is arranged between the first rotary table substrate (1071) and the first copper pressing plate (2041); the second G10 press block (4072) is arranged between the second rotary table base plate (1072) and the second copper press plate (2042); the strip passes through the middle parts of the two copper pressing plates and the two G10 pressing blocks, the first copper pressing plate (2041) presses the middle part of the strip onto the first G10 pressing block (4071), and the second copper pressing plate (2042) presses the middle part of the strip onto the second G10 pressing block (4072); the first spur gear (1081) and the second spur gear (1082) are coupled to each other such that the first turntable substrate (1071) is capable of driving the second turntable substrate (1072) to rotate simultaneously; thereby bending the strip material;
the conductive device comprises a copper pipe (201), a copper braid belt (202), a first copper lead plate (2031), a second copper lead plate (2032), a first copper pressing plate (2041) and a second copper pressing plate (2042) which are used for electrifying the strip; the copper pipe (201) is externally connected with a current lead, and the bottom of the copper pipe is connected with a copper braid (202); the first copper lead plate (2031) is mounted on a first G10 pad (4061); the second copper lead plate (2032) is mounted on a second G10 pad (4062); the copper braid (202) is fixed on the two copper lead plates;
the heat insulation layer (300) is formed by stacking a plurality of layers of heat insulation materials, is arranged between the first middle isolation plate (4031) and the cover plate (402) and is used for reducing leakage of liquid helium;
the foundation framework comprises a stainless steel pipe (401), a cover plate (402), a first middle isolation plate (4031), a second middle isolation plate (4032), a bottom plate (404), an eye bolt (405), a first G10 base plate (4061), a second G10 base plate (4062), a first G10 pressing block (4071), a second G10 pressing block (4072), a first side plate (4081), a second side plate (4082), a third side plate (4083), a fourth side plate (4084), a limiting block (409) and a copper pipe insulating sleeve (411) which are used for fixing the whole device; the two ends of the stainless steel tube (401) are respectively connected with the bottom plate (404) and the cover plate (402), so as to play a role in fixing the whole device; the eye bolt (405) is arranged on the cover plate (402) and is used for connecting a traveling crane to move the device; the first side plate (4081), the second side plate (4082), the third side plate (4083), the fourth side plate (4084), the first G10 base plate (4061) and the second G10 base plate (4062) are all arranged on the bottom plate (404); a copper pipe insulating sleeve (411) is arranged between the copper pipe (201) and the cover plate (402); one end of the limiting block (409) is fixed on the first side plate (4081), and the other end of the limiting block is used for limiting the worm (104) to prevent the worm (104) from transversely shaking;
the motor (101) is mounted on the cover plate (402), and the motor connecting shaft (102) traverses the first intermediate partition plate (4031) and the second intermediate partition plate (4032).
2. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: the motor (101) drives the worm (104) to rotate so as to drive the turbine (105) to rotate, and the belt material is pressed between the copper pressing plate and the G10 pressing block on the rotating platform substrate, so that the rotation of the turbine (105) can enable the first rotating platform substrate (1071) and the second rotating platform substrate (1072) to reversely rotate so as to drive the belt material to bend; the two ends of the strip are respectively fixed between two copper lead plates and two G10 backing plates.
3. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: the turbine (105) is mounted between the first side plate (4081) and the second side plate (4082) through a first rotation shaft;
one end of the worm (104) is connected with the coupler (103), and the other end of the worm is arranged on the bottom plate (404) through an oilless shaft sleeve.
4. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: the first rotary table base plate (1071) is mounted between the second side plate (4082) and the third side plate (4083) through a first rotary shaft (1061) and a second rotary shaft (1062);
the second turntable substrate 1072 is mounted between the second side plate 4082 and the fourth side plate 4084 through a third rotation shaft 1063 and a fourth rotation shaft 1064.
5. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: the first side plate (4081), the second side plate (4082), the third side plate (4083) and the fourth side plate (4084) are fixed on the bottom plate (404) through screws, the third side plate (4083) and the fourth side plate (4084) are adjacently placed, and the first side plate (4081) and the second side plate (4082) are placed in front-back parallel; one end of the limiting block (409) is fixed on the first side plate (4081) through a screw.
6. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: a square small groove is formed above the cover plate (402) and used for installing and fixing the motor (101).
7. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: the bottom of the copper pipe (201) is provided with a square plate, and the square plate is provided with four small holes for installing the copper pipe (201) on the second middle isolation plate (4032); the copper pipe (201) has an outer diameter of 10mm and a wall thickness of 1.5mm, and can bear 400A of current.
8. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: the copper pipe insulating sleeve (411) is used for insulating between the copper pipe (201) and the cover plate (402);
the oilless shaft sleeves are respectively arranged between the motor connecting shaft (102) and the middle isolation plate and between the worm (104) and the bottom plate (404) and are used for reinforcing the fixation of the worm (104) and the motor connecting shaft (102); the intermediate separator is a first intermediate separator (4031) and a second intermediate separator (4032).
9. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: the first G10 pad (4061) is arranged between the bottom plate (404) and the first copper lead plate (2031) and is used for insulating between the bottom plate (404) and the first copper lead plate (2031); the second G10 pad (4062) is mounted between the base plate (404) and the second copper lead plate (2032) for insulation between the base plate (404) and the second copper lead plate (2032).
10. The device for testing the cyclic bending and current carrying characteristics of the high-temperature superconducting tape in the liquid helium temperature range according to claim 1, wherein the device comprises the following components: the layers of insulation (300) are 40mm thick each, 5mm apart and a total of 10 layers.
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| CN202111475302.0A CN114167182B (en) | 2021-12-06 | 2021-12-06 | Device for testing cyclic bending and current-carrying characteristics of liquid helium temperature zone of superconducting strip |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040056597A (en) * | 2002-12-24 | 2004-07-01 | 한국전기연구원 | Continuous critical current measurement system for high temperature superconducting tape |
| KR100805284B1 (en) * | 2006-08-31 | 2008-02-20 | 한국전기연구원 | Holder for measurement of bending strain effect on critical current in hts superconducting tapes and accelerated test apparatus adopting the holder |
| CN110261694A (en) * | 2019-05-17 | 2019-09-20 | 中国科学院合肥物质科学研究院 | A kind of variable bending criticality energy test sample bar of Superconducting Strand |
| CN111413567A (en) * | 2020-04-21 | 2020-07-14 | 清华大学 | System and method for testing current-carrying characteristics of superconducting tape |
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2021
- 2021-12-06 CN CN202111475302.0A patent/CN114167182B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040056597A (en) * | 2002-12-24 | 2004-07-01 | 한국전기연구원 | Continuous critical current measurement system for high temperature superconducting tape |
| KR100805284B1 (en) * | 2006-08-31 | 2008-02-20 | 한국전기연구원 | Holder for measurement of bending strain effect on critical current in hts superconducting tapes and accelerated test apparatus adopting the holder |
| CN110261694A (en) * | 2019-05-17 | 2019-09-20 | 中国科学院合肥物质科学研究院 | A kind of variable bending criticality energy test sample bar of Superconducting Strand |
| CN111413567A (en) * | 2020-04-21 | 2020-07-14 | 清华大学 | System and method for testing current-carrying characteristics of superconducting tape |
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| 一种新型YBCO高温超导带材临界电流特性测试方法;诸嘉慧;丘明;田军涛;;低温与超导(05);全文 * |
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