1. A dynamic field cooling process and a measuring method of a high-temperature superconducting magnetic suspension system are characterized in that: the method comprises the following steps:

s1: constructing a dynamic field cooling process and a testing device and preparing before testing;

s2: fixing the high-temperature superconductor at the bottom of the low-temperature Dewar, and adjusting the testing device to ensure that the circular permanent magnet track is opposite to the low-temperature Dewar;

s3: adjusting the initial height of the low-temperature Dewar and rotating the circular permanent magnet track;

s4: refrigerating the low-temperature dewar, and simulating the field cooling of the low-temperature dewar in a dynamic state;

s5: after the high-temperature superconductor is completely cooled in the field, the height of the low-temperature Dewar is adjusted to the working height, the data collected by the triaxial force sensor is fed back to the information collection system in real time, and the data collected by the information collection system is processed;

the testing device comprises a rotary sliding table module, a vertical sliding table module, a triaxial force sensor, a low-temperature Dewar, a permanent magnet track and a base; set up rotatory slip table module on the base, fixed permanent magnetism track on the rotatory slip table module, the rotating electrical machines drive permanent magnetism track rotation of rotatory slip table module, and permanent magnetism track top sets up the low temperature dewar, and low temperature dewar bottom sets up high temperature superconductor, triaxial force transducer is connected with perpendicular slip table module.

2. The dynamic field cooling process and measurement method of the high-temperature superconducting magnetic levitation system according to claim 1, characterized in that: the S1 includes the following steps:

s101: a low-temperature Dewar is arranged above the permanent magnet track at a certain gap, the bottom of the permanent magnet track is fixed on a permanent magnet track substrate, and the permanent magnet track substrate are integrally fixed on the rotary sliding table module;

s102: one end of a triaxial force sensor is connected with the low-temperature Dewar through a pi-shaped connecting piece, and the other end of the triaxial force sensor is connected with the vertical moving beam;

s103: the vertical moving beam is connected with a vertical driving motor through a transmission system, and the working height of the low-temperature Dewar is indirectly adjusted by adjusting the height of the vertical moving beam;

s104: connecting the triaxial force sensor with a data acquisition system through a signal line;

s105: the data acquisition system acquires measurement data of the triaxial force sensor.

3. The dynamic field cooling process and measurement method of the high-temperature superconducting magnetic levitation system according to claim 1, characterized in that: the S2 includes the following steps:

s201: putting the high-temperature superconductor at the bottom of the low-temperature Dewar and locking;

s202: the transverse center line of the position of the permanent magnet track is superposed with the transverse center line of the low-temperature dewar above the permanent magnet track;

and S203, coinciding the longitudinal center line of the position of the permanent magnet track with the longitudinal center line of the low-temperature Dewar above the permanent magnet track.

4. The dynamic field cooling process and measurement method of the high-temperature superconducting magnetic levitation system according to claim 1, characterized in that: the S3 includes the following steps:

s301: adjusting the vertical moving beam according to different initial height requirements, and recording the requirements by a vertical length gauge;

s302: and starting the rotating motor, and enabling the circular permanent magnet track under the low-temperature Dewar to rotate at a high speed along with the rotating motor.

5. The dynamic field cooling process and measurement method of the high-temperature superconducting magnetic levitation system according to claim 1, characterized in that: the S4 includes the following steps:

s401: refrigerating the high-temperature superconductor in the low-temperature dewar by a single method of injecting liquid nitrogen, low-pressure nitrogen fixation treatment and refrigerating by a refrigerator or a combination method of any two or more of the methods;

s402: in the refrigeration process, the low-temperature Dewar and the annular permanent magnet track move relatively, and the field cooling of the low-temperature Dewar in a dynamic state is indirectly simulated;

s403: the rotating speed of the rotating motor is changed by adjusting the frequency of the rotating motor, so that the low-temperature Dewar above the rotating motor is subjected to field cooling in different speed motion states.

6. The dynamic field cooling process and measurement method of the high-temperature superconducting magnetic levitation system according to claim 1, characterized in that: the S5 includes the following steps:

s501: the vertical moving beam is connected with a vertical driving motor, and the gap between the low-temperature Dewar and the permanent magnet track is adjusted to be the working height;

s502: the triaxial force sensor measures the guiding force and the suspension force borne by the low-temperature Dewar;

s503: and transmitting the data to a data acquisition system through the triaxial force sensor, and turning off the rotating motor.

Background

The high-temperature superconducting magnetic levitation system has self-stabilizing suspension and guiding capabilities, and has the advantages of simple structure, no need of electric power maintenance, energy conservation, environmental protection and the like. Has wide application prospect in the fields of ground ultra-high speed transportation, electromagnetic emission and the like.

As shown in fig. 4, at present, the field cooling process of the high-temperature superconducting magnetic levitation system is basically a quasi-static process, most of the tests on the high-temperature superconducting magnetic levitation system are performed after the quasi-static field is cooled, and a part of the tests are dynamic measurements performed after the static field is cooled, but the field cooling process when the low-temperature dewar and the permanent magnet track move relatively is not involved.

In order to research the influence of the high-temperature superconducting magnetic levitation system on the guiding force and the levitation force of the high-temperature superconducting magnetic levitation system under different field cooling speeds and different heights, the invention provides a dynamic field cooling process and a measurement method of the high-temperature superconducting magnetic levitation system.

Disclosure of Invention

The invention aims to effectively solve the problem of field cooling of a high-temperature superconductor (YBCO) at different speeds and different heights, and can effectively test the influence of dynamic speed on the magnitude of suspension force, thereby expanding the dynamic performance evaluation index and the measurement method of a high-temperature superconducting magnetic suspension system.

In order to achieve the purpose, the technical solution of the invention is as follows:

a dynamic field cooling process and a measuring method of a high-temperature superconducting magnetic suspension system are characterized in that: the method comprises the following steps:

s1: constructing a dynamic field cooling process and a testing device and preparing before testing;

s2: fixing the high-temperature superconductor at the bottom of the low-temperature Dewar, and adjusting the testing device to ensure that the circular permanent magnet track is opposite to the low-temperature Dewar;

s3: adjusting the initial height of the low-temperature Dewar and rotating the circular permanent magnet track;

s4: refrigerating the low-temperature dewar, and simulating the field cooling of the low-temperature dewar in a dynamic state;

s5: after the high-temperature superconductor is completely cooled in the field, the height of the low-temperature Dewar is adjusted to the working height, the data collected by the triaxial force sensor is fed back to the information collection system in real time, and the data collected by the information collection system is processed;

the testing device comprises a rotary sliding table module, a vertical sliding table module, a triaxial force sensor, a low-temperature Dewar, a permanent magnet track and a base; set up rotatory slip table module on the base, fixed permanent magnetism track on the rotatory slip table module, the rotating electrical machines drive permanent magnetism track rotation of rotatory slip table module, and permanent magnetism track top sets up the low temperature dewar, and low temperature dewar bottom sets up high temperature superconductor, triaxial force transducer is connected with perpendicular slip table module.

Further, the S1 includes the following steps:

s101: a low-temperature Dewar is arranged above the permanent magnet track at a certain gap, the bottom of the permanent magnet track is fixed on a permanent magnet track substrate, and the permanent magnet track substrate are integrally fixed on the rotary sliding table module;

s102: one end of a triaxial force sensor is connected with the low-temperature Dewar through a pi-shaped connecting piece, and the other end of the triaxial force sensor is connected with the vertical moving beam;

s103: the vertical moving beam is connected with a vertical driving motor through a transmission system, and the working height of the low-temperature Dewar is indirectly adjusted by adjusting the height of the vertical moving beam;

s104: connecting the triaxial force sensor with a data acquisition system through a signal line;

s105: the data acquisition system acquires measurement data of the triaxial force sensor.

Further, the S2 includes the following steps:

s201: putting the high-temperature superconductor at the bottom of the low-temperature Dewar and locking;

s202: the transverse center line of the position of the permanent magnet track is superposed with the transverse center line of the low-temperature dewar above the permanent magnet track;

and S203, coinciding the longitudinal center line of the position of the permanent magnet track with the longitudinal center line of the low-temperature Dewar above the permanent magnet track.

Further, the S3 includes the following steps:

s301: adjusting the vertical moving beam according to different initial height requirements, and recording the requirements by a vertical length gauge;

s302: and starting the rotating motor, and enabling the circular permanent magnet track under the low-temperature Dewar to rotate at a high speed along with the rotating motor.

Further, the S4 includes the following steps:

s401: refrigerating the high-temperature superconductor in the low-temperature dewar by a single method of injecting liquid nitrogen, low-pressure nitrogen fixation treatment and refrigerating by a refrigerator or a combination method of any two or more of the methods;

s402: in the refrigeration process, the low-temperature Dewar and the annular permanent magnet track move relatively, and the field cooling of the low-temperature Dewar in a dynamic state is indirectly simulated;

s403: the rotating speed of the rotating motor is changed by adjusting the frequency of the rotating motor, so that the low-temperature Dewar above the rotating motor is subjected to field cooling in different speed motion states.

Further, the S5 includes the following steps:

s501: the vertical moving beam is connected with a vertical driving motor, and the gap between the low-temperature Dewar and the permanent magnet track is adjusted to be the working height;

s502: the triaxial force sensor measures the guiding force and the suspension force borne by the low-temperature Dewar;

s503: and transmitting the data to a data acquisition system through the triaxial force sensor, and turning off the rotating motor.

Compared with the prior art, the invention has the beneficial effects that: the problem of dynamic field cooling of the high-temperature superconductor (YBCO) at different speeds and different heights can be effectively solved, the magnitude of the buoyancy force and the guiding force in the dynamic process can be effectively tested, and further the dynamic performance evaluation index and the measuring method of the high-temperature superconducting magnetic levitation system are expanded.

Drawings

The description of the drawings, which is intended as a further supplement to the description of the invention and not as a limitation of the embodiments of the invention, is:

FIG. 1: the test schematic of the invention;

FIG. 2: the structure diagram of the testing device of the invention is I;

FIG. 3: a top view of the annular permanent magnet track and the low-temperature dewar;

FIG. 4: a schematic diagram of a traditional field cooling process and a testing process;

FIG. 5: a dynamic field cooling process and a test process are shown schematically;

FIG. 6: a lateral annular permanent magnet track and a low-temperature Dewar are in transverse view;

names of reference numbers in the drawings:

1-rotating sliding table module, 101-permanent magnet track, 102-permanent magnet track substrate, 105-rotating motor, 2-vertical sliding table module, 202-vertical moving beam, 203-three-axis sensor, 204- 'pi' -shaped connecting piece, 205-low temperature dewar, 206-high temperature superconductor, 207-vertical length meter, 211-vertical driving motor, 3-base, Gap-suspension Gap, CH-initial cooling height and WH-working height.

Detailed Description

As shown in fig. 2 and 3, the testing device according to the present invention includes a rotating sliding table module 1, a vertical sliding table module 2, a triaxial force sensor 203, a low temperature dewar 205, a permanent magnet track 101 and a base 3, wherein the base 3 is provided with the rotating sliding table module 1, the permanent magnet track 101 is fixed on the rotating sliding table module 1, a rotating motor 105 of the rotating sliding table module 1 drives the permanent magnet track 101 to rotate, the low temperature dewar 205 is arranged above the permanent magnet track 101, the bottom of the low temperature dewar 205 is provided with a high temperature superconductor 206, and the triaxial force sensor 203 is connected with the vertical sliding table module 2.

As shown in fig. 5, a low-temperature dewar 205 is arranged at an initial cooling height CH directly above the permanent magnet track 101, so that the permanent magnet track 101 rotates at a high speed along with the turntable, at this time, liquid nitrogen is added into the low-temperature dewar 205 to indirectly simulate the field cooling of the high-temperature superconductor 206 and the permanent magnet track 101 in the relative motion process, after the high-temperature superconductor 206 is completely cooled, the test is performed in two situations, one is that the permanent magnet track 101 is stationary below the low-temperature dewar, so that the suspension Gap between the low-temperature dewar and the permanent magnet track is the working height WH, and the triaxial force sensor 203 measures the suspension force, the guiding force and the magnetic resistance force of the low-temperature dewar 205. The other is that the permanent magnet track 101 continues to rotate at a high speed below the low-temperature dewar 205, so that the gap between the low-temperature dewar 205 and the permanent magnet track 101 is a working height WH, and the suspension force, the guiding force and the magnetic resistance force of the low-temperature dewar 205 are measured by a triaxial force sensor.

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the present invention provides a dynamic field cooling process and a measurement method for a high temperature superconducting magnetic levitation system, the method comprises the following steps:

s1: constructing a dynamic field cooling process and a testing device and preparing before testing;

the step S1 includes the following steps:

s101: a low-temperature Dewar 205 is arranged above the permanent magnet track 101 at a certain gap, the bottom of the permanent magnet track is fixed on a permanent magnet track substrate 102, and the permanent magnet track substrate are integrally fixed on the rotary sliding table module 1;

s102: one end of a triaxial force sensor 203 is connected with a low-temperature Dewar 205 through a pi-shaped connecting piece 204, and the other end is connected with a vertical moving beam 202;

s103: the vertical moving beam 202 is connected with a vertical driving motor 211, and the height of the low-temperature Dewar 205 is indirectly adjusted by adjusting the height of the vertical moving beam 202;

s104: connecting the triaxial force sensor 203 with a data acquisition system through a signal line;

s105: the data acquisition system acquires measurement data of the triaxial force sensor 203;

s2: fixing a high-temperature superconductor 206 at the bottom of the low-temperature Dewar 205, and adjusting the rotary sliding table module 1 to ensure that the annular permanent magnet track 101 is opposite to the low-temperature Dewar 205;

the step S2 includes the following steps:

s201: placing and locking the high-temperature superconductor 206 at the bottom of the low-temperature dewar 205;

s202: the transverse center line of the position of the permanent magnet track 101 is coincided with the transverse center line of the low-temperature Dewar 205 above the permanent magnet track;

s203, the longitudinal center line of the position of the permanent magnet track 101 is superposed with the longitudinal center line of the low-temperature Dewar 205 above the permanent magnet track;

s3: adjusting the initial height CH of the low-temperature Dewar and rotating the annular permanent magnet track 101;

the step S3 includes the following steps:

s301: according to the requirements of different initial heights CH, the vertical moving beam 202 is adjusted, and the requirements are met through the recording of a vertical length meter 207;

s302: starting the rotating motor 105, and enabling the circular permanent magnet track 101 below the low-temperature Dewar 205 to rotate at a high speed along with the rotating motor 105;

s4: refrigerating the low-temperature Dewar 205, and simulating the field cooling of the low-temperature Dewar 205 in the dynamic state;

the step S4 includes the following steps:

s401: refrigerating the high-temperature superconductor 206 in the low-temperature dewar 205 by a single method of injecting liquid nitrogen, low-pressure nitrogen fixation treatment and refrigerating by a refrigerator or a combination method of any two or more of the methods;

s402: in the refrigeration process, the low-temperature Dewar 205 and the circular permanent magnet track 101 move relatively, and the field cooling of the low-temperature Dewar 205 in a dynamic state is indirectly simulated;

s403: the rotating speed of the rotating motor 105 is changed by adjusting the frequency of the rotating motor, so that the upper low-temperature Dewar 205 is subjected to field cooling in different speed motion states;

s5: after the high-temperature superconductor 206 is completely cooled, the height of the low-temperature Dewar 205 is adjusted to be a working height WH, data collected by the triaxial force sensor 203 are fed back to the information collection system in real time, and the data collected by the information collection system are processed;

the step S5 includes the following steps:

s501: the vertical moving beam 202 is connected with a vertical driving motor 211 through a transmission system, and the gap between the low-temperature Dewar 205 and the permanent magnet track 101 is adjusted to be Working Height (WH);

s502: the triaxial force sensor 203 measures the guiding force and the suspension force borne by the low-temperature Dewar 205;

s503: the data is transmitted to the data acquisition system via the triaxial force sensor 203 and the rotating machine 105 is turned off.

The dynamic field cooling process and the measurement method of the high-temperature superconducting magnetic levitation system are also applicable to a dynamic performance test device formed by the lateral annular permanent magnet track shown in fig. 6, and the specific flow and steps can refer to the embodiment and are not repeated here.

It can be seen that compared with the prior art, the invention has the beneficial effects that: the invention aims to effectively solve the problem of field cooling of a high-temperature superconductor (YBCO) at different speeds and different heights, and can effectively test the influence of dynamic speed on the magnitude of suspension force, thereby expanding the dynamic performance evaluation index and the measurement method of a high-temperature superconducting magnetic suspension system.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.