CN113109747A - Superconducting magnetic suspension micro-suspension force rapid testing device and testing method - Google Patents
Superconducting magnetic suspension micro-suspension force rapid testing device and testing method Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
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- G01L5/0028—Force sensors associated with force applying means
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
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Abstract
The invention discloses a superconducting magnetic suspension micro-suspension force rapid test device and a test method, and the device comprises a rack, wherein a permanent magnet track and a superconducting block are arranged on the rack, a sliding plate and a driving device for driving the sliding plate to approach or leave the permanent magnet track along the vertical direction right above the permanent magnet track are also arranged on the rack, a test unit and a liquid nitrogen box which are fixed relatively are also arranged on the sliding plate, and the superconducting block is positioned in the liquid nitrogen box and is fixedly connected with the test unit; because the test unit and the liquid nitrogen box are respectively and fixedly connected with the sliding plate, the test unit and the liquid nitrogen box are relatively fixed in position and synchronously move along with the movement of the sliding plate and are isolated from each other, the adverse effect of the change of gravity and buoyancy on a test result is eliminated through the ingenious arrangement of a connecting structure, and the test precision is greatly improved; meanwhile, the whole set of testing device is slightly changed, the structure is simple, the operation is convenient, and the reliability and the stability of the equipment are improved.
Description
Technical Field
The invention relates to the technical field of superconducting tests, in particular to a device and a method for rapidly testing superconducting magnetic suspension micro-suspension force.
Background
The suspension force of the high-temperature superconducting magnetic suspension refers to the vertical acting force between the superconductor and the permanent magnet track. For the most common levitation situation, the test method is superconductor up, permanent magnet or permanent magnet track down. The superconductor enters a superconducting state by being cooled by liquid nitrogen or a refrigerator at a field cooling position, then is driven by a motor to vertically move downwards until the lowest test height is reached, and then is turned back and lifted until the suspension force is reduced to zero. In the moving process, the vertical force acquired by the force sensor is the suspension force. The suspension force is the most important concern of high-temperature superconducting magnetic suspension, so a plurality of testing devices and testing methods are available.
The existing testing device is mainly characterized in that a servo motor or a stepping motor is utilized to realize vertical displacement of a superconductor, some displacement is obtained through a laser displacement sensor, and some displacement is directly obtained through rotation of the stepping motor. And (3) acquiring suspension force data by using the tension and compression sensor, and controlling the movement of the motor and the acquisition and processing of the suspension force data by using a computer. Some test devices focus on the measurement of a single superconductor, and the measuring range is more than 300N; some of the test devices focus on the measurement of multiple or a whole dewar superconductor, with the range of over 1000N.
With the development of high-temperature superconducting magnetic levitation, the experimental demand of micro-levitation force is gradually increased. Because various properties of high-temperature superconducting magnetic suspension, such as Jc anisotropy, Jc-B relation and the like, are not obvious in the phenomenon of large-size superconductors, and very obvious or even extreme physical phenomena are shown in tiny superconductors; that is, the tiny superconductor will make the research of high temperature superconducting magnetic suspension closer to the principle essence. In addition, the research on the second generation high temperature superconducting tapes has been gradually increased in recent years, and since the suspension force is small, some physical properties are more extreme than those of the bulk material, and the size of the bulk material can be easily reduced, more realistic demands are made on the test of the micro suspension force, and a special test device for testing the micro suspension force is required.
The test object of the existing device focuses on the suspension force of a single superconductor or more, and the most defect of the monitoring device is that a container for containing liquid nitrogen is placed on a permanent magnet track by a partial monitoring device on a specific structure is that a clamp is required to clamp a superconducting block when the device is used, and in the process that the superconducting block and the clamp are immersed into liquid nitrogen, the buoyancy force borne by the superconducting block is changed due to the continuous change of the depth, so that the test precision is influenced; the other method is that a container for containing liquid nitrogen is hung on a testing device, although the influence of buoyancy can be eliminated, the influence of gravity is reduced continuously due to continuous volatilization of the liquid nitrogen in the experimental process, and the testing precision is influenced; although the above change has little influence on the measurement of the large superconducting mass, in the field of the measurement of the small superconducting mass, the levitation force is generally measured in mN units, and therefore the above influence causes a large deviation in measurement accuracy.
In addition, the device needs to repeatedly disassemble and assemble the superconducting blocks in the measuring process, and meanwhile, the connection relation among all devices is complex, so that the testing efficiency is low.
Disclosure of Invention
Aiming at the defects of low test precision and test efficiency in the prior art, the invention discloses a device and a method for rapidly testing superconducting magnetic suspension micro suspension force.
The invention realizes the aim through the following technical scheme:
a superconducting magnetic suspension micro-suspension force rapid testing device comprises a rack, a permanent magnet track and a superconducting block, wherein the permanent magnet track is fixedly arranged on the rack, and the rack is also provided with a sliding plate and a driving device for driving the sliding plate to approach or leave the permanent magnet track vertically above the permanent magnet track; the sliding plate is also fixedly provided with a test unit and a liquid nitrogen box which are fixed at a relative interval, and the superconducting block is fixedly connected with the test unit and inserted into the liquid nitrogen box.
Preferably, the rack is provided with an adjusting screw rod and a sliding limiting groove, the sliding plate is provided with a limiting block, and the limiting block penetrates through the sliding limiting groove to be connected with the adjusting screw rod; the driving device comprises an adjusting motor which is connected with the adjusting lead screw in a power mode.
Preferably, the adjusting motor is arranged on one side of the rack, and the adjusting motor is in power connection with the adjusting screw rod through a first bevel gear and a second bevel gear which are meshed with each other.
Preferably, the rack is further rotatably provided with an adjusting wheel, and the adjusting screw rod is in power connection with the adjusting wheel through a third bevel gear and a second bevel gear.
Preferably, the test unit comprises a tension-compression sensor and a test rod with a hollow structure, which are connected with each other, and the superconducting block is fixedly arranged on the end face of the free end of the test rod.
Preferably, the superconducting block is fixedly bonded with the test rod through a low-temperature adhesive tape.
Preferably, the liquid nitrogen box comprises a box body and a bottom plate which are mutually sealed, the top end of the liquid nitrogen box is of an open structure, the bottom plate is a flat plate, and the thickness of the bottom plate is 0.5mm-1 mm.
Preferably, the testing device further comprises a digital display displacement scale, the digital display displacement scale comprises a movable probe and a fixed display which are matched with each other, the fixed display is fixedly connected with the rack, and the movable probe is fixed on the sliding plate.
Preferably, a plane displacement platform is further fixedly arranged on the rack, and the permanent magnet track is fixed on the plane displacement platform.
Correspondingly, the invention also discloses a method for rapidly testing the superconducting magnetic suspension micro-suspension force, which comprises the following steps:
s1, fixing the superconductor on the bottom surface of the test rod through a low-temperature adhesive tape, and fixing the permanent magnet track on a plane moving workbench;
s2, adjusting the positions of the superconductor and the permanent magnet track, realizing the position calibration between the superconductor block and the permanent magnet track, and simultaneously performing zeroing on the sensor;
s3, adjusting the superconducting block to a field cooling height, installing a liquid nitrogen box, filling liquid nitrogen into the liquid nitrogen box, ensuring that the liquid nitrogen submerges the superconducting block, and standing until the superconducting block enters a superconducting state;
s4, setting the motion track of the superconducting block, driving the superconducting block to move towards the permanent magnet track direction through the driving motor, and detecting the suspension force through the tension and compression sensor;
when the superconducting block reaches the lowest detection height, the superconducting block is controlled to move reversely to the final height through the driving motor, and meanwhile, corresponding detection data of the tension and compression sensor are recorded;
and S5, directly heating the liquid nitrogen box to volatilize the liquid nitrogen and remove the superconducting state of the superconducting block.
Compared with the prior art, the invention has the following beneficial effects:
1. the superconducting device comprises a rack, wherein a permanent magnet track and a superconducting block are arranged on the rack, a sliding plate and a driving device for driving the sliding plate to approach or leave the permanent magnet track vertically above the permanent magnet track are also arranged on the rack, a test unit and a liquid nitrogen box which are fixed relatively are also arranged on the sliding plate, and the superconducting block is positioned in the liquid nitrogen box and is fixedly connected with the test unit;
when the device works, liquid nitrogen is filled into the liquid nitrogen box, the superconducting block is immersed into the liquid nitrogen, and then the testing unit and the liquid nitrogen box are driven to move by the sliding plate, so that related tests are completed;
compared with the test equipment with the synchronous motion structure in the prior art, the test unit and the liquid nitrogen box are respectively and fixedly connected with the sliding plate through the structural description, so that the liquid nitrogen box and the test unit are in a mutually separated state, and the gravity of the liquid nitrogen box and the liquid nitrogen is not conducted to the test unit, so that the gravity change caused by volatilization of the liquid nitrogen in the test process does not influence the test precision, thereby fundamentally overcoming the influence of peripheral equipment on the test precision;
compared with the liquid nitrogen fixed type test equipment in the prior art, the relative distance between the test unit and the liquid nitrogen box is fixed, and the liquid nitrogen box, the test unit and the superconducting block synchronously move along with the sliding plate, so that the components are in a relatively static state, the position of the superconducting block immersed in the liquid nitrogen is fixed no matter how the sliding plate moves, the buoyancy force borne by the superconducting block is unchanged, and the buoyancy force can be eliminated by zeroing the sensor before an experiment, so that the detection error caused by the buoyancy force change caused by the movement of the superconducting block is avoided, and the test precision is improved.
2. The rack of the invention is also provided with an adjusting screw rod and a sliding limiting groove, the sliding plate is provided with a limiting block, the limiting block passes through the sliding limiting groove to be connected with a screw thread of the adjusting screw rod, the adjusting screw rod is also provided with a second bevel gear, the adjusting motor and the adjusting wheel are symmetrically arranged at two sides of the adjusting screw rod, and the adjusting motor and the adjusting wheel are respectively engaged with the second bevel gear through a first bevel gear and a third bevel gear to realize power connection;
on one hand, the adjusting motor and the adjusting wheel are reasonably distributed to two sides of the rack through the matching of the three bevel gears, the driving device is more reasonable in arrangement, and the size of the equipment is favorably reduced; meanwhile, reasonable adjusting wheels are arranged, so that the operation comfort of experimenters can be guaranteed, the rapid adjustment of equipment is realized, and the measurement error caused by the property change of the superconducting block due to the rapid volatilization of liquid nitrogen is avoided, so that the experimental efficiency and precision are guaranteed;
on the other hand, the automatic adjustment of the motor is matched with the manual adjustment of the adjusting wheel, the drive of the adjusting motor can ensure that the uniform motion of the superconducting block is realized, the adverse effect of the acceleration on the test result is avoided, and the test precision is improved; and the manual adjustment is mainly applied to the tail end of the superconducting block moving to the lowest test height, and the bottom surface of the liquid nitrogen box is ensured to be just contacted with the top surface of the permanent magnet track through the fine adjustment of the manual adjustment, so that the control precision is improved.
Meanwhile, the transmission structure is simple, and the reliability and the stability of the whole set of equipment can be effectively improved.
3. The testing unit comprises a tension-compression sensor and a testing rod, wherein the superconducting block is fixedly bonded to the end face of the free end of the testing rod through a low-temperature adhesive tape;
firstly, the invention aims at the detection and clamping of the tiny superconducting block, in the prior art, no matter a metal or nonmetal clamp is adopted to clamp the superconducting block, the clamp is aimed at the large-size superconducting block, and the clamp has larger volume, so that the whole set of device is influenced by larger buoyancy force to influence the testing precision; in addition, the clamp made of metal inevitably generates electromagnetic force with the track in the test process to further influence the test precision, and the non-metal clamp is also influenced by the processing precision, so that the essence of fixing by adopting the low-temperature adhesive tape skillfully solves all the defects through the innovation of a bonding mode, thereby improving the test precision;
secondly, in the prior art, the low-temperature adhesive tape is simple in material used for bonding, wide in source and convenient to operate, can realize quick disassembly of the superconducting block, can meet the quick operation requirement caused by quick volatilization of liquid nitrogen in the testing process of the superconducting block, and ensures that the superconducting block is always immersed by the liquid nitrogen in the whole testing process, so that the quick change of buoyancy is avoided, and the testing precision is improved;
the low-temperature adhesive tape is thin, a thick isolation layer cannot be generated after the low-temperature adhesive tape is firmly fixed, and the thickness of a gap between the superconducting block and the permanent magnet track can be effectively guaranteed, so that the superconducting block is guaranteed to be reduced to the minimum test height range, and the test precision is improved.
Finally, aiming at the micro low-temperature superconducting block, the bonding force provided by the low-temperature adhesive tape can meet the basic requirement of stable fixation, and the structure of the equipment is simplified to the maximum extent under the condition of meeting the basic use requirement; meanwhile, the low-temperature adhesive tape is bonded on the actual operation process without frequently replacing different clamps, so that the experiment efficiency is improved. The experimental cost is reduced, and the reliability and the stability of the equipment are improved;
the testing rod adopts a hollow structure, and compared with a solid structure, liquid nitrogen can enter the inner wall of the testing rod, so that the contact area between the end surface of the testing rod and the liquid nitrogen is reduced, the buoyancy force borne by the testing rod is further reduced, and the adverse effect of the buoyancy force on the detection precision is reduced.
4. The liquid nitrogen box comprises a box body and a bottom plate which are mutually connected in a sealing way, wherein the bottom plate is of a flat plate structure, and the thickness of the bottom plate is 0.5-1 mm;
in the prior art, a liquid nitrogen container such as a dewar tank is generally adopted as the liquid nitrogen container, the thickness of the bottom of the container is generally larger than 5mm, so that the distance between the superconducting block and a permanent magnet track cannot be adjusted to the lowest test height of 2mm no matter how the superconducting block is adjusted, and for the test of a micro superconducting block, the detectable range is very narrow, if the distance is too large, the detection precision of a detection device is insufficient, and even the detection parameters cannot be obtained; the liquid nitrogen box with the flat bottom and the thin-wall structure can effectively reduce the distance between the bottom surface of the superconducting block and the top surface of the permanent magnet track, thereby reducing the testing height to the maximum extent, ensuring that the superconducting block can be reduced to the minimum testing height, improving the testing precision and simultaneously acquiring higher data authenticity.
5. The invention is also provided with a digital display displacement scale, wherein the digital display displacement scale comprises a movable probe and a fixed display which are matched with each other, the fixed display is fixedly connected with the rack, the movable probe is fixed on the sliding plate, and an experimenter can clearly read the displacement parameters of the superconducting block through the digital display displacement scale, so that the later manual control is facilitated, the adjustment accuracy is improved, the adjustment efficiency is improved, and the test time is shortened.
6. The plane displacement workbench is further arranged on the rack, the permanent magnet rail is arranged on the plane displacement workbench, and the position between the superconducting block and the permanent magnet rail is adjusted through the plane displacement workbench, so that detection of different point positions is realized, the use is convenient, and the test efficiency can be effectively improved.
7. Compared with the conventional test process, the method can control the superconductor to realize quenching without disassembling a liquid nitrogen container and a clamp, shorten the test time, reduce the test procedures and further improve the experimental efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is an enlarged view of portion A of the present invention;
FIG. 4 is a schematic view of the transmission structure of the present invention;
FIG. 5 is a schematic view of the connection structure of the sliding plate and the frame according to the present invention;
reference numerals: 1. the device comprises a frame, 2, a permanent magnet track, 3, a superconductive block, 4, a sliding plate, 5, a liquid nitrogen box, 6, an adjusting screw rod, 7, a sliding limiting groove, 8, a limiting block, 9, an adjusting motor, 10, a first bevel gear, 11, a second bevel gear, 12, an adjusting wheel, 13, a third bevel gear, 14, a tension and compression sensor, 15, a testing rod, 16, a low-temperature adhesive tape, 17, a digital display displacement scale, 18, a plane displacement platform, 51, a box body, 52, a bottom plate, 171, a movable probe, 172 and a fixed display.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1 to 5, the present embodiment provides a superconducting magnetic levitation micro levitation force rapid test apparatus, which includes a rack 1, a permanent magnet rail 2, and a superconducting block 3, wherein a planar displacement platform 18 is fixedly disposed on the rack 1, the planar displacement platform 18 is a commonly-used X-Y displacement platform, and the permanent magnet rail 2 is fixedly disposed on a top surface of the planar displacement platform 18;
a sliding table is vertically arranged on one side of the rack 1, an adjusting screw 6 is rotatably arranged in the sliding table through a rolling bearing, a sliding limiting groove 7 is also arranged on the sliding table along the vertical direction, a limiting block 8 is slidably arranged in the sliding limiting groove 7, one side of the limiting block 8 is in threaded connection with the adjusting screw 6, the other side of the limiting block 8 is integrally connected with a sliding plate 4, and meanwhile, the sliding limiting groove 7 is matched with the limiting block 8 to realize the rotation limiting of the sliding plate 4, so that the sliding plate 4 is driven to slide in the vertical direction through the adjusting screw 6;
an adjusting motor 9 and an adjusting wheel 12 are respectively arranged on two sides of the sliding table, the adjusting motor 9 is fixedly connected with the rack 1, and the adjusting wheel 12 is rotatably connected with the sliding table through a rolling bearing; a second bevel gear 11 is fixedly arranged on the adjusting screw 6, a first bevel gear 10 is arranged on an output shaft of the adjusting motor 9, a third bevel gear 13 is arranged on an adjusting wheel 12, the first bevel gear 10 and the third bevel gear 13 are symmetrically arranged about the adjusting screw 6, and the first bevel gear 10 and the third bevel gear 13 are respectively meshed with the second bevel gear 11, so that the power connection of the adjusting screw 6 is realized;
the testing device also comprises a testing unit and a liquid nitrogen box 5, wherein the testing unit comprises a tension and compression sensor 14 and a testing rod 15, the testing rod 15 is of a hollow structure, one end of the testing rod 15 is fixedly connected with a detecting head of the tension and compression sensor 14, the other end of the testing rod is an overhanging end in a free state, and the superconducting block 3 is fixedly bonded on the end surface of the overhanging end of the testing rod 15 through a low-temperature adhesive tape 16;
meanwhile, the liquid nitrogen box 5 comprises a box body 51 and a bottom plate 52, the box body 51 is hermetically connected with the bottom plate 52, the top of the liquid nitrogen box 5 is of an open structure, and after the liquid nitrogen box is installed, the detection rod 15 is inserted into the liquid nitrogen box 5, so that the superconducting block 3 is immersed through liquid nitrogen, and meanwhile, the superconducting block 3 is not in contact with the inner wall of the liquid nitrogen box 5; meanwhile, the bottom plate 52 is of a flat plate structure, and the thickness of the bottom plate is 0.5mm-1mm according to the requirement; preferably, the liquid nitrogen box 5 is made of hard paperboard;
the testing device further comprises a digital display displacement scale 17, the digital display displacement scale 17 comprises a movable probe 171 and a fixed display 172, wherein the fixed display 172 is fixedly arranged on the rack 1, the movable probe 171 is fixed on the sliding plate 4, and a signal receiving device of the fixed display 172 is opposite to the movable probe 171 in the vertical direction, so that the normal work of the digital display displacement scale 17 is ensured;
The embodiment is taken as a basic embodiment of the invention, and discloses a method for rapidly testing superconducting magnetic suspension micro-levitation force, which comprises the following steps:
s1, fixing the superconductor on the bottom surface of the test rod through a low-temperature adhesive tape, and fixing the permanent magnet track on a plane moving workbench;
s2, controlling the superconducting block to move to one side of the permanent magnet track through the adjusting motor, and controlling the adjusting motor to stop when the distance between the bottom surface of the superconducting block and the top surface of the permanent magnet track is 1-3 mm;
then, fine adjustment is carried out on the superconducting block through an adjusting wheel, detection parameters of the tension and compression sensor are concerned, when the parameters of the tension and compression detector change from 0, the superconducting block is judged to be just contacted with the permanent magnet track, and the adjusting wheel stops rotating at the moment;
the digital display displacement scale parameters are reset to zero, and the contact point of the superconducting block and the permanent magnet track is used as the origin of coordinates;
s3, adjusting the superconducting block to a set field cooling height by reversely rotating the adjusting wheel, fixedly installing a liquid nitrogen box on the sliding plate, simultaneously injecting liquid nitrogen into the liquid nitrogen box, and ensuring that the depth of the superconducting block immersed in the liquid nitrogen is not less than 30mm, wherein the bottom surface of the superconducting block is preferably just attached to the bottom surface of the liquid nitrogen box; after the liquid nitrogen is filled, the equipment is kept stand for 1min to 1.5min, and the superconducting block is ensured to enter a superconducting state; simultaneously, parameters of the tension and compression sensor are reset to zero;
s4, setting the motion track of the sliding plate through the computer control terminal, driving the superconducting block to move towards the permanent magnet track direction through the driving motor, and detecting the suspension force through the tension and compression sensor;
when the superconducting block reaches the lowest detection height, the superconducting block is controlled to move reversely to the final height through the driving motor, and meanwhile, corresponding detection data of the tension and compression sensor are recorded;
s5, directly heating the liquid nitrogen box to volatilize the liquid nitrogen and remove the superconducting state of the superconducting block;
s6, adjusting the position of the permanent magnetic track through the plane displacement platform, simultaneously recording corresponding adjustment parameters, calibrating the relative position of the adjusted position relative to the original point in the step S2 in the computer, and then repeating the steps S3-S5 to finish the test of different point positions.
Compared with the test equipment with the synchronous motion structure in the prior art, the test unit and the liquid nitrogen box are respectively and fixedly connected with the sliding plate through the structural description, so that the liquid nitrogen box and the test unit are in a mutually separated state, and the gravity of the liquid nitrogen box and the liquid nitrogen cannot be transmitted to the test unit, so that the gravity change caused by volatilization of the liquid nitrogen in the test process cannot influence the test precision, and the influence of peripheral equipment on the test precision is fundamentally overcome;
compared with the liquid nitrogen fixed type test equipment in the prior art, the relative distance between the test unit and the liquid nitrogen box is fixed, and the liquid nitrogen box, the test unit and the superconducting block synchronously move along with the sliding plate, so that the components are in a relatively static state, the position of the superconducting block immersed in the liquid nitrogen is fixed no matter how the sliding plate moves, the buoyancy force borne by the superconducting block is unchanged, and the buoyancy force can be eliminated through zero return of the sensor before an experiment, so that the detection error caused by the buoyancy force change caused by the movement of the superconducting block is avoided, and the test precision is improved.
Claims (10)
1. The utility model provides a little suspension of superconductive magnetic suspension quick testing arrangement, includes frame (1), permanent magnetism track (2) and superconducting block (3), and permanent magnetism track (2) are fixed to be set up on frame (1), its characterized in that: the rack (1) is also provided with a sliding plate (4) and a driving device for driving the sliding plate (4) to approach or leave the permanent magnet track (2) along the vertical direction right above the permanent magnet track (2); the sliding plate (4) is further fixedly provided with a testing unit and a liquid nitrogen box (5) which are fixed at a relative interval, and the superconducting block (3) is fixedly connected with the testing unit and inserted into the liquid nitrogen box (5).
2. The superconducting magnetic levitation micro levitation force rapid test device according to claim 1, characterized in that: an adjusting screw rod (6) and a sliding limiting groove (7) are arranged on the rack (1), a limiting block (8) is arranged on the sliding plate (4), and the limiting block (8) penetrates through the sliding limiting groove (7) to be connected with the adjusting screw rod (6) in a threaded manner; the driving device comprises an adjusting motor (9) which is in power connection with the adjusting screw rod (6).
3. The superconducting magnetic levitation micro levitation force rapid test device according to claim 2, characterized in that: the adjusting motor (9) is arranged on one side of the rack (1), and the adjusting motor (9) is in power connection with the adjusting screw rod (6) through a first bevel gear (10) and a second bevel gear (11) which are meshed with each other.
4. The superconducting magnetic levitation micro levitation force rapid testing device as claimed in claim 3, wherein: the frame (1) is also rotatably provided with an adjusting wheel (12), and the adjusting screw rod (6) is in power connection with the adjusting wheel (12) through a second bevel gear (11) and a third bevel gear (13).
5. The superconducting magnetic levitation micro levitation force rapid test device according to claim 1, characterized in that: the test unit comprises a tension-compression sensor (14) and a test rod (15) with a hollow structure, wherein the tension-compression sensor and the test rod are connected with each other, and the superconducting block (3) is fixedly arranged on the end face of the hanging end of the test rod (15).
6. The superconducting magnetic levitation micro levitation force rapid testing device according to claim 5, characterized in that: the superconducting block (3) is fixedly bonded with the test rod (15) through a low-temperature adhesive tape (16).
7. The superconducting magnetic levitation micro levitation force rapid test device according to claim 1, characterized in that: the liquid nitrogen box (5) comprises a box body (51) and a bottom plate (52) which are sealed mutually, the top end of the liquid nitrogen box is of an open structure, the bottom plate (52) is of a flat plate structure, and the thickness of the bottom plate (52) is 0.5mm-1 mm.
8. The superconducting magnetic levitation micro levitation force rapid test device according to claim 1, characterized in that: the testing device further comprises a digital display displacement scale (17), the digital display displacement scale (17) comprises a movable probe (171) and a fixed display (172) which are matched with each other, the fixed display (172) is fixedly connected with the rack (1), and the movable probe (171) is fixed on the sliding plate (4).
9. The superconducting magnetic levitation micro levitation force rapid test device according to claim 1, characterized in that: the machine frame (1) is further fixedly provided with a plane displacement platform (18), and the permanent magnet track (2) is fixed on the plane displacement platform (18).
10. A test method based on the superconducting magnetic levitation micro-levitation force rapid test device as claimed in any one of claims 1 to 9, characterized by comprising the following steps:
s1, fixing the superconductor on the bottom surface of the test rod through a low-temperature adhesive tape, and fixing the permanent magnet track on a plane moving workbench;
s2, adjusting the positions of the superconductor and the permanent magnet track, realizing the position calibration between the superconductor block and the permanent magnet track, and simultaneously performing zeroing on the sensor;
s3, adjusting the superconducting block to a field cooling height, installing a liquid nitrogen box, filling liquid nitrogen into the liquid nitrogen box, ensuring that the liquid nitrogen submerges the superconducting block, and standing until the superconducting block enters a superconducting state;
s4, setting the motion track of the superconducting block, driving the superconducting block to move towards the permanent magnet track direction through the driving motor, and detecting the suspension force through the tension and compression sensor;
when the superconducting block reaches the lowest detection height, the superconducting block is controlled to move reversely to the final height through the driving motor, and meanwhile, corresponding detection data of the tension and compression sensor are recorded;
and S5, heating the liquid nitrogen box to volatilize the liquid nitrogen and remove the superconducting state of the superconducting block.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966494A (en) * | 2022-05-23 | 2022-08-30 | 西南交通大学 | Multi-magnetic-levitation-system measuring device based on magnetic-thermal-force multi-field coupling and measuring method thereof |
| CN115014610A (en) * | 2022-06-23 | 2022-09-06 | 湖南凌翔磁浮科技有限责任公司 | Electromagnet test bench |
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