CN220809134U - Vortex brake device of low-temperature superconductive high-speed maglev train based on low-pressure pipeline - Google Patents
Vortex brake device of low-temperature superconductive high-speed maglev train based on low-pressure pipeline Download PDFInfo
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- CN220809134U CN220809134U CN202322337519.6U CN202322337519U CN220809134U CN 220809134 U CN220809134 U CN 220809134U CN 202322337519 U CN202322337519 U CN 202322337519U CN 220809134 U CN220809134 U CN 220809134U
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Abstract
The utility model belongs to the technical field of magnetic suspension brake devices, and particularly relates to an eddy current brake device of a low-temperature superconductive high-speed magnetic suspension train based on a low-pressure pipeline; the device comprises an induction track and a permanent magnet module positioned above the induction track, wherein the permanent magnet module is fixed at the bottom of a vehicle body, eddy currents are formed by the induction of the permanent magnet module and the induction track, and eddy current generates eddy current braking force under the action of a magnetic field of the permanent magnet module; at least one group of lifting mechanisms are arranged between the permanent magnet modules and the vehicle body, the lifting mechanisms enable the permanent magnet modules to displace in the vertical direction, and the induction areas of the permanent magnet modules and the induction track are adjusted; the lifting mechanism can adjust the induction area of the permanent magnet module and the induction track, and then adjust the magnitude of the eddy current braking force.
Description
Technical Field
The utility model belongs to the technical field of magnetic suspension braking devices, and particularly relates to an eddy current braking device of a low-temperature superconductive high-speed magnetic suspension train based on a low-pressure pipeline.
Background
Along with the development of science and technology, the requirements of human beings on the speed are also higher and higher, and the running speed of high-speed magnetic levitation is also continuously improved nowadays. The high-speed magnetic levitation technology is a relatively new high-speed traffic technology, and the rapid development of the high-speed magnetic levitation technology at the speed of 600 km per hour in China is followed in recent years, so that the hot trend of the research on the high-speed magnetic levitation technology is raised in China.
At present, the high-speed magnetic levitation technology mainly comprises three systems: the operation speed of various systems can exceed 600km/h. For a low-temperature superconductive high-speed magnetic levitation train, the currently feasible safety braking technical scheme is that wind resistance braking is adopted in a high-speed section, and air friction braking is adopted in a low-speed section.
High-speed magnetic levitation trains necessarily require a transport environment for low-pressure pipelines in order to achieve higher-speed operation. In a low-pressure environment, the air density is extremely thin, and the existing wind resistance braking technology cannot be applied, so that development of a novel safety braking technology is needed.
By combining the current various technical schemes, vortex braking is one of the better choices. The eddy current braking can be divided into electromagnetic eddy current braking and permanent magnet eddy current braking according to an excitation mode, and the electromagnetic eddy current braking is applied to the safety braking of the conventional high-speed magnetic levitation train. However, when the train is operated in a low pressure pipeline environment, the air density is thin, so that heat generated by the exciting coil cannot be dissipated, and the braking performance is greatly reduced.
Disclosure of utility model
Aiming at the defects existing in the prior art, the utility model provides the vortex brake device of the low-temperature superconductive high-speed magnetic levitation train based on the low-pressure pipeline, which can reduce the safe brake distance of the train.
The utility model provides an eddy current braking device of a low-temperature superconductive high-speed magnetic levitation train based on a low-pressure pipeline, which comprises,
The induction track is arranged below the inner part of the low-pressure pipeline;
The permanent magnet module is positioned above the induction track and fixed at the bottom of the car body, eddy currents are formed by the induction of the permanent magnet module and the induction track, and eddy current generates eddy current braking force under the action of the magnetic field of the permanent magnet module;
wherein,
At least one group of lifting mechanisms is arranged between the permanent magnet modules and the vehicle body, the lifting mechanisms enable the permanent magnet modules to displace along the vertical direction, the induction areas of the permanent magnet modules and the induction track are adjusted, and the magnitude of the generated eddy current braking force is adjusted.
According to the technical scheme, the permanent magnet module is magnetic, an additional power supply exciting coil is not required to be arranged, the heating problem does not exist, the device is suitable for safe braking of a low-pressure pipeline superconducting high-speed magnetic levitation train, the lifting mechanism can adjust the induction area of the permanent magnet module and the induction track, and then the size of the eddy current braking force is adjusted, so that safe braking of the magnetic levitation train is realized.
In some embodiments of the application, the lifting mechanism comprises
The bottom end of the lifting rod is fixed on the top surface of the permanent magnet module, and the lifting rod drives the permanent magnet module to displace in the vertical direction;
The transmission assembly is used for driving the lifting rod to lift in the vertical direction and comprises a driving motor and a transmission gear set connected with an output shaft of the driving motor, the driving motor is fixed at the bottom of the vehicle body, and the transmission gear set is fixed with the upper end of the lifting rod;
The driving motor drives the transmission gear set to rotate, and the transmission gear set drives the lifting rod to displace in the vertical direction.
In some embodiments of the present application, a lifting groove extending along the length direction of the lifting rod is formed at a position, close to the upper side, of the lifting rod, a sliding shaft is fixed at the bottom end of the lifting groove, the sliding shaft is perpendicular to a straight line where the lifting rod is located, two ends of the sliding shaft penetrate out of the lifting groove, and the driving gear set rotates to drive the sliding shaft to move to drive the lifting rod to displace in the vertical direction.
In some embodiments of the application, the drive gear set comprises
The driving gear is connected with an output shaft of the driving motor;
The driven gear piece is meshed with the driving gear and comprises two gear plates which are parallel and are arranged at intervals, and a rotating shaft which penetrates through the two gear plates, a part of the lifting rod, which is close to the upper part, is arranged between the two gear plates, and the rotating shaft penetrates through the lifting groove on the lifting rod;
Every all open the guide way on the gear board, the guide way is extended to the second end by first end, first end is located and is close to the teeth of a cogwheel position of gear board, the second end is located and is close to the position of pivot, the both ends of sliding shaft pass two respectively the guide way, and can the guide way first end with slide between the second end, the sliding shaft drives the lifter removes in vertical direction.
In some embodiments of the present application, the gear plate has a fan-shaped structure, including two straight sides and an arc-shaped side with teeth between the two straight sides, and the guide groove is disposed near one of the straight sides.
In some embodiments of the present application, the eddy current brake configuration further comprises a plurality of guide assemblies uniformly disposed between the vehicle body and the permanent magnet modules, the guide assemblies comprising:
the top end of the first sleeve is fixed at the bottom of the vehicle body;
The second sleeve is sleeved in the first sleeve and is in sliding connection with the first sleeve, and the bottom end of the second sleeve is fixed on the top surface of the permanent magnet module;
When the permanent magnet module is lifted, the second sleeve slides up and down along the first sleeve, so that a guiding effect is achieved.
In some embodiments of the present application, the induction track is in an inverted T-shaped structure, and includes a horizontal portion and a vertical portion, wherein end surfaces on two sides of the vertical portion are respectively located on the permanent magnet module, the lifting mechanism drives the permanent magnet module to move up and down, and the magnitude of the induction area of the vertical portion and the permanent magnet module is adjusted to adjust the magnitude of the braking force.
In some embodiments of the present application, the permanent magnet module is an inverted U-shaped structure, and has a cavity with a downward opening, and the permanent magnet is lifted to adjust the depth of the vertical portion entering the cavity, adjust the size of the sensing area of the vertical portion and the permanent magnet module, and further adjust the size of the braking force.
In some embodiments of the application, the sensing track is a non-ferromagnetic metal material.
Based on the technical scheme, the eddy current braking device of the embodiment of the utility model increases extra braking force for the low-temperature superconducting high-speed magnetic levitation train running in normal environment, and further reduces the safety braking distance of the train;
The self-magnetic permanent magnet module is used, an additional power supply exciting coil is not required to be arranged, the heating problem is avoided, the self-magnetic permanent magnet module is suitable for the safe braking of a low-voltage pipeline superconducting high-speed magnetic levitation train, the lifting mechanism can adjust the induction area of the permanent magnet module and the induction track, and the magnitude of the eddy current braking force is further adjusted, so that the safe braking of the magnetic levitation train is realized;
The lifting mechanism adopts a driving motor to drive a gear set for transmission, and the number of rotation turns of the driving motor is determined according to the required braking force value, namely the number of rotation teeth of the driving gear is determined, so that the area of the permanent magnet module entering the induction track is determined;
The problem that the existing wind resistance brake cannot be applied to a low-temperature superconducting high-speed magnetic levitation train running in a low-pressure pipeline due to rarefaction of air is solved, and the problem of safety brake of the train is further solved; meanwhile, the problem that the exciting coil cannot dissipate heat when electromagnetic eddy current braking is adopted is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic view of the positional relationship between a vehicle body and a track according to an embodiment of the present utility model;
FIG. 2 is a schematic view of the positional relationship of a vehicle body, an eddy current brake configuration, and an induction track in accordance with one embodiment of the present utility model;
FIG. 3 is a schematic side view of a vehicle body, an eddy current brake configuration, and a sensing track in accordance with one embodiment of the utility model;
FIG. 4 is a schematic diagram showing the positional relationship of a driving gear, a driven gear member, and a lifting lever according to an embodiment of the present utility model;
Fig. 5 is a schematic diagram showing a front view of a vehicle body, an eddy current brake configuration and a sensor track according to one embodiment of the utility model.
In the figure:
10. A vehicle body; 11. a mounting plate; 12. a fixing plate; 20. a superconducting magnet; 30. an 8-shaped coil; 40. a linear motor; 50. a track; 51. sensing a track; 511. a horizontal portion; 512. a vertical portion; 60. a permanent magnet module; 70. a lifting mechanism; 71. a lifting rod; 711. a lifting groove; 712. a sliding shaft; 72. a transmission assembly; 721. a driving motor; 73. a drive gear set; 731. a drive gear; 732. a driven gear member; 7321. a gear plate; 7322. a rotating shaft; 7323. a guide groove; 7324. a first end; 7325. a second end; 7326. straight edges; 7327. an arc edge; 80. a guide assembly; 81. a first sleeve; 82. and a second sleeve.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in figure 1, the side surfaces of a vehicle body 10 and a rail 50 are areas for installing a linear motor 40, a 8-shaped coil 30 and a superconducting magnet 20, and the space is compact, so that the low-temperature superconducting high-speed magnetic levitation vehicle eddy current braking device based on a low-pressure pipeline is arranged in the middle area at the bottom of the vehicle body 10, and the structure comprises,
The induction track 51 is arranged at a middle position of the track 50 below the inner part of the low-pressure pipeline, and only the installation position of the induction track 51 is shown in fig. 1;
The permanent magnet module 60 is positioned above the induction track 51 and arranged at the bottom of the car body 10, the permanent magnet module 60 and the induction track 51 induce eddy currents, and the eddy currents generate eddy current braking force under the action of the magnetic field of the permanent magnet module 60; only the mounting positions of the induction track 51 and the permanent magnet modules 60 are indicated in fig. 1.
Specifically, at least one set of lifting mechanisms 70 is disposed between the permanent magnet module 60 and the vehicle body 10, as shown in fig. 2, in this embodiment, a set of lifting mechanisms 70 are disposed at the front and rear ends of the permanent magnet module 60, and the lifting mechanisms 70 drive the permanent magnet module 60 to displace in the vertical direction, adjust the sensing area of the permanent magnet module 60 and the sensing track 51, and adjust the magnitude of the generated eddy current braking force.
The permanent magnet module 60 in the eddy current braking device is magnetic, no extra power supply exciting coil is needed, no heating problem exists, the eddy current braking device is suitable for the safety braking of a low-voltage pipeline superconducting high-speed magnetic levitation train, and the lifting mechanism 70 can adjust the induction area of the permanent magnet module 60 and the induction track 51, so that the magnitude of eddy current braking force is adjusted, and the safety braking of the magnetic levitation train is realized.
Referring to FIG. 3, the lifting mechanism 70 includes
The lifting rod 71 is vertically arranged, the bottom end of the lifting rod is fixed on the top surface of the permanent magnet module 60, and the lifting rod 71 moves up and down to drive the permanent magnet module 60 to displace in the vertical direction; a lifting groove 711 extending along the length direction is arranged at the position of the lifting rod 71 close to the upper part, a sliding shaft 712 is fixed at the bottom end of the lifting groove 711, the sliding shaft 712 is arranged in the horizontal direction, a straight line perpendicular to the lifting rod 71 is arranged, the two end parts of the sliding shaft 712 extend out of the lifting groove 711,
The transmission assembly 72 is used for driving the lifting rod 71 to lift in the vertical direction and comprises a driving motor 721 and a transmission gear set 73 connected with an output shaft of the driving motor 721, the driving motor 721 is fixed at the bottom of the vehicle body 10, and the transmission gear set 73 is fixed with the upper end of the lifting rod 71;
The driving motor 721 drives the driving gear set 73 to rotate on a vertical plane, the driving gear set 73 rotates to drive the sliding shaft 712 to move up and down in the vertical direction, and the sliding shaft 712 moves to drive the lifting rod to displace in the vertical direction 71.
As shown in fig. 3, the drive gear set 73 specifically includes
A driving gear 731 connected to the output shaft of the driving motor 721, in this embodiment, the driving gear 731 is a circular gear, and the plane of the driving gear 731 is parallel to the lifting rod 71;
The driven gear piece 732 is meshed with the driving gear 731 and comprises two parallel gear plates 7321 which are arranged at intervals and a rotating shaft 7322 which penetrates through the two gear plates 7321, the driving gear 731 drives the two gear plates 7321 to rotate at the same time, the driven gear piece 732 rotates around the rotating shaft 7322, a part of the lifting rod 71 close to the upper part is arranged between the two gear plates 7321, the rotating shaft 7322 also penetrates through a lifting groove 711 on the lifting rod 71 at the same time, a gap between the two gear plates 7321 is matched with the thickness of the lifting rod 71, and in the process of up-down movement of the lifting rod 71 along with the rotation of the gear plates 7321, the shaking of the lifting rod 71 caused by the gap between the gear plates 7321 and the lifting rod 71 in the moving process is avoided, so that the stability and the size of the braking force of the permanent magnet module 60 in the moving process are influenced, and the braking safety is influenced;
In this embodiment, as shown in fig. 4, the guide grooves 7323 are formed on each gear plate 7321, and the guide grooves 7323 are in an arc structure, the guide grooves 7323 extend from a first end 7324 to a second end 7325, the first end 7324 is close to the tooth root circle of the gear teeth of the gear plates 7321, the second end 7325 is close to the rotating shaft 7322, and two ends of the sliding shaft 712 respectively pass through the two guide grooves 7323 and can slide between the first end 7324 and the second end 7325 of the guide grooves 7323; in the present embodiment, the sliding shaft 712 slides to drive the lifting rod 71 to move in the vertical direction, and meanwhile, since the guide slot 7323 has an arc structure, there is a certain stroke in both the vertical direction and the horizontal direction, so that the lifting rod 71 swings left and right in the horizontal direction while generating a displacement stroke in the up-down direction; during the movement of the lifting lever 71, the rotation shaft 7322 slides in the lifting groove 711, and the rotation shaft 7322 is not only the rotation center of the driven gear member 732, but also the rotation center of the lifting lever 71 during the movement; the rotation shaft 7322 and the sliding shaft 712 together define a moving track of the lifting rod 71, and a change in a linear distance between the rotation shaft 7322 and the sliding shaft 712 is a change in displacement of the permanent magnet module 60 in the vertical direction.
With continued reference to fig. 4, the gear plate 7321 has a fan-shaped structure, in this embodiment, the central angle of the gear plate 7321 is a right angle, the gear plate includes two straight edges 7326 and an arc edge 7327 with gear teeth connecting the two straight edges, the guide slot 7323 is disposed near one straight edge 7321, the first end 7324 of the guide slot 7323 is near the starting position of the gear teeth of the arc edge 7327 in this embodiment, the driving gear 731 drives the driven gear member 732 to rotate anticlockwise, when the gear teeth on the arc edge 7327 rotate from the final position to the starting position, the sliding shaft 712 moves from the first end 7324 to the second end 7325 of the guide slot 7323, the rotating shaft 7322 moves from the upper end to the lower end of the lifting slot 711, the lifting rod 71 moves upwards, the permanent magnet module 60 is driven to move upwards, the sensing area between the permanent magnet module 60 and the sensing track 51 is reduced, and the braking force is reduced; on the contrary, the driving gear 731 drives the driven gear 732 to rotate clockwise, when the driving gear 731 rotates from the starting position to the final position of the gear teeth on the arc-shaped edge 7327, the sliding shaft 712 moves from the second end 7325 to the first end 7324 of the guiding slot 7323, the rotating shaft 7322 moves from the lower end to the upper end of the lifting slot 711, the lifting rod 71 moves downward, the permanent magnet module 60 moves downward, the sensing area between the permanent magnet module 60 and the sensing track 51 increases, and the braking force increases.
In order to increase stability of the permanent magnet module 60 during lifting, the eddy current braking device further includes a plurality of guide assemblies 80 uniformly disposed between the vehicle body 10 and the permanent magnet module 60, in this embodiment, as shown in fig. 2, four guide assemblies 80 are disposed between the vehicle body and the permanent magnet module 60, and are respectively disposed at four top corners of the permanent magnet module 60 to guide and balance lifting of the permanent magnet module 60, as shown in fig. 5, the guide assemblies 80 in this embodiment include:
a first sleeve 81 having a top end fixed to the bottom of the vehicle body 10;
The second sleeve 82 is sleeved in the first sleeve 81 and is in sliding connection with the first sleeve 81, and the bottom end of the second sleeve 82 is fixed on the top surface of the permanent magnet module 60;
In the braking process, the permanent magnet module 60 descends, the second sleeve 82 slides downwards along the first sleeve 21, and when the braking is released, the permanent magnet module 60 descends, the second sleeve 82 slides upwards along the first sleeve 21, and the permanent magnet module 60 is guided and stably moves up and down.
In this embodiment, as shown in fig. 5, in order to facilitate the installation of the eddy current braking device, the damage to the vehicle body 10 caused by direct installation on the bottom surface of the vehicle body 10 is reduced, the bottom end of the vehicle body 10 is provided with a horizontal installation plate 11, the top end of the first sleeve of the guiding assembly 80 is fixed on the installation plate 11, two vertical fixing plates 12 are further provided on the installation plate 11 corresponding to the installation position of the driving motor 721, the driving motor is fixed on the outer side of one of the fixing plates 12, the driving gear 731 and the driven gear 732 are placed in parallel with the fixing plates 12 and are located between the two fixing plates 12, and two ends of the rotating shaft 7322 of the driven gear 732 respectively pass through the two fixing plates 12.
For eddy current braking, since a normal force exists in the braking process, in this embodiment, the sensing track 51 is in an inverted T-shaped structure, and includes a horizontal portion 511 and a vertical portion 512, the horizontal portion 511 is fixed on the track 50, two side end surfaces of the vertical portion 512 respectively induce with two side surfaces of the permanent magnet module 60, the normal force has a left-right offset effect, and the sensing track 51 in this embodiment is made of nonferromagnetic metal materials, such as copper, aluminum, etc., and the normal force of the sensing track 51 is expressed as repulsive force, so that a tangential braking force is generated in the braking process, and a guiding force for centering a train is generated; the lifting mechanism 70 drives the permanent magnet module 60 to move up and down, and adjusts the sensing area of the vertical portion 512 of the sensing track 51 and the permanent magnet module 60 to adjust the braking force.
The permanent magnet module 60 is of an inverted U-shaped structure, and is provided with a cavity 61 with a downward opening, the permanent magnet module 60 is lifted to adjust the depth of the vertical portion 512 entering the cavity 61, and the induction area of the vertical portion 512 and the permanent magnet module 60 is adjusted to adjust the braking force.
When the train gives out a safety braking command, the driving motor 721 drives the driving gear 731 to rotate, and thus drives the driven gear 732 to rotate clockwise. At this time, the sliding shaft 712 of the lifting rod 71 rotates toward the first end 7324 at the second end 7235 of the guide groove 7323 of the driven gear 732, the rotating shaft 7322 moves from the lower end of the lifting groove 711 to a position close to the upper end, the lifting rod 71 moves downward to drive the permanent magnet module 60 to gradually descend, the sensing area between the permanent magnet module 60 and the sensing rail 51 increases, and the braking force increases; determining the number of rotations of the driving motor, namely the number of rotation teeth of the driving gear, according to the required braking force value, and further determining the area of the permanent magnet module 60 entering the induction track 51;
When receiving the relief command, the action process is opposite to the above, and the driving motor 721 drives the driving gear 731 to rotate, so as to drive the driven gear 732 to rotate anticlockwise; the sliding shaft 712 of the lifting rod 71 rotates toward the second end 7325 at the first end 7234 of the guide groove 7323 of the driven gear member 732, the rotating shaft 7322 moves from a position near the upper end to a position near the lower end of the lifting groove 711, the lifting rod 71 moves upward to drive the permanent magnet module 60 to gradually rise, the sensing area between the permanent magnet module 60 and the sensing rail 51 is reduced, and the braking force is reduced.
Based on the technical scheme, the eddy current braking device of the embodiment of the utility model increases extra braking force for the low-temperature superconducting high-speed magnetic levitation train running in normal environment, and further reduces the safety braking distance of the train;
The self-magnetic permanent magnet module is used, an additional power supply exciting coil is not required to be arranged, the heating problem is avoided, the self-magnetic permanent magnet module is suitable for the safe braking of a low-voltage pipeline superconducting high-speed magnetic levitation train, the lifting mechanism can adjust the induction area of the permanent magnet module and the induction track, and the magnitude of the eddy current braking force is further adjusted, so that the safe braking of the magnetic levitation train is realized;
The lifting mechanism adopts a driving motor to drive a gear set for transmission, and the number of rotation turns of the driving motor is determined according to the required braking force value, namely the number of rotation teeth of the driving gear is determined, so that the area of the permanent magnet module entering the induction track is determined;
The problem that the existing wind resistance brake cannot be applied to a low-temperature superconducting high-speed magnetic levitation train running in a low-pressure pipeline due to rarefaction of air is solved, and the problem of safety brake of the train is further solved; meanwhile, the problem that the exciting coil cannot dissipate heat when electromagnetic eddy current braking is adopted is solved.
Finally, it should be noted that: in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (9)
1. An eddy current braking device of a low temperature superconductive high speed magnetic levitation train based on a low pressure pipeline is characterized by comprising,
The induction track is arranged below the inner part of the low-pressure pipeline;
The permanent magnet module is positioned above the induction track and fixed at the bottom of the car body, eddy currents are formed by the induction of the permanent magnet module and the induction track, and eddy current generates eddy current braking force under the action of the magnetic field of the permanent magnet module;
wherein,
At least one group of lifting mechanisms is arranged between the permanent magnet modules and the vehicle body, the lifting mechanisms enable the permanent magnet modules to displace along the vertical direction, the induction areas of the permanent magnet modules and the induction track are adjusted, and the magnitude of the generated eddy current braking force is adjusted.
2. The eddy current braking configuration of a low temperature superconducting high speed magnetic levitation train based on a low pressure pipeline of claim 1 wherein the lifting mechanism comprises
The bottom end of the lifting rod is fixed on the top surface of the permanent magnet module, and the lifting rod drives the permanent magnet module to displace in the vertical direction;
The transmission assembly is used for driving the lifting rod to lift in the vertical direction and comprises a driving motor and a transmission gear set connected with an output shaft of the driving motor, the driving motor is fixed at the bottom of the vehicle body, and the transmission gear set is fixed with the upper end of the lifting rod;
The driving motor drives the transmission gear set to rotate, and the transmission gear set drives the lifting rod to displace in the vertical direction.
3. The eddy current braking device of the low-temperature superconducting high-speed magnetic levitation train based on the low-pressure pipeline according to claim 2, wherein a lifting groove extending along the length direction of the lifting rod is formed in a position, close to the upper side, of the lifting rod, a sliding shaft is fixed at the bottom end of the lifting groove, the sliding shaft is perpendicular to a straight line where the lifting rod is located, two ends of the sliding shaft penetrate out of the lifting groove, and the transmission gear set rotates to drive the sliding shaft to move to drive the lifting rod to displace in the vertical direction.
4. The eddy current braking configuration for a low temperature superconducting high speed magnetic levitation train based on a low pressure pipeline according to claim 3, wherein the transmission gear set comprises
The driving gear is connected with an output shaft of the driving motor;
The driven gear piece is meshed with the driving gear and comprises two gear plates which are parallel and are arranged at intervals, and a rotating shaft which penetrates through the two gear plates, a part of the lifting rod, which is close to the upper part, is arranged between the two gear plates, and the rotating shaft penetrates through the lifting groove on the lifting rod;
Every all open the guide way on the gear board, the guide way is extended to the second end by first end, first end is located and is close to the teeth of a cogwheel position of gear board, the second end is located and is close to the position of pivot, the both ends of sliding shaft pass two respectively the guide way, and can the guide way first end with slide between the second end, the sliding shaft drives the lifter removes in vertical direction.
5. The eddy current brake configuration for a low temperature superconducting high speed magnetic levitation train based on a low pressure pipeline as claimed in claim 4 wherein the gear plate is a fan-shaped structure comprising two straight sides and an arcuate side with gear teeth between the two straight sides, the guide slot being disposed adjacent to one of the straight sides.
6. The low-pressure pipeline-based eddy current braking configuration of a low-temperature superconducting high-speed magnetic levitation train of claim 1, further comprising a plurality of guide assemblies uniformly disposed between the body and the permanent magnet modules, the guide assemblies comprising:
the top end of the first sleeve is fixed at the bottom of the vehicle body;
The second sleeve is sleeved in the first sleeve and is in sliding connection with the first sleeve, and the bottom end of the second sleeve is fixed on the top surface of the permanent magnet module;
When the permanent magnet module is lifted, the second sleeve slides up and down along the first sleeve.
7. The eddy current braking device of the low-temperature superconducting high-speed magnetic levitation train based on the low-pressure pipeline according to claim 1, wherein the induction track is of an inverted T-shaped structure and comprises a horizontal portion and a vertical portion, two side end faces of the vertical portion are respectively driven by the permanent magnet module lifting mechanism to drive the permanent magnet module to move up and down, and the size of the induction area of the vertical portion and the size of the induction area of the permanent magnet module are adjusted.
8. The eddy current braking configuration of a low temperature superconducting high speed magnetic levitation train based on low pressure pipeline of claim 7 wherein the permanent magnet module is of inverted U-shaped structure having a cavity with downward opening, the permanent magnet is lifted to adjust the depth of the vertical portion into the cavity, adjust the sensing area of the vertical portion and the permanent magnet module, and then adjust the magnitude of braking force.
9. The eddy current braking configuration for a low temperature superconducting high speed magnetic levitation train based on low pressure pipeline of claim 1 wherein the induction track is a non-ferromagnetic metallic material.
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