CN109808504B - Magnetic levitation transportation system - Google Patents

Magnetic levitation transportation system Download PDF

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Publication number
CN109808504B
CN109808504B CN201810497948.0A CN201810497948A CN109808504B CN 109808504 B CN109808504 B CN 109808504B CN 201810497948 A CN201810497948 A CN 201810497948A CN 109808504 B CN109808504 B CN 109808504B
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magnetic levitation
linear motor
module
track
groups
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CN109808504A (en
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张志宇
刘子忠
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Beijing Worldartery Transportation Technology Co ltd
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Beijing Worldartery Transportation Technology Co ltd
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Abstract

The invention discloses a magnetic levitation transportation system, which comprises: magnetic levitation module, track, linear electric motor and passive magnetic levitation train, wherein, the magnetic levitation module includes: permanent magnet modules in a concave arc structure; the top surface and the bottom surface of the concave arc structure are provided with concave arc surfaces, and the side surfaces are vertical surfaces; the number of the magnetic levitation modules is two, and the two groups of magnetic levitation modules are arranged at the bottom of the passive magnetic levitation train; a linear motor, comprising: a linear motor stator and a linear motor rotor; the linear motor stator is arranged on the center of the road surface of the ballast bed in the tunnel to be operated along the travelling direction of the passive magnetic levitation train; the number of the tracks is two, and the two groups of tracks are uniformly arranged on two sides of the linear motor stator. The scheme of the invention can solve the problems of complex structure and poor safety performance caused by suspension and guide split in the existing passive magnetic suspension system, and achieves the beneficial effects of simplifying the structure and improving the safety performance.

Description

Magnetic levitation transportation system
Technical Field
The invention belongs to the technical field of traffic, and particularly relates to a magnetic levitation transportation system, in particular to a running mechanism based on a passive permanent magnet levitation technology, a track thereof and a transportation system with the running mechanism and the track thereof.
Background
The existing rail transit vehicle system may include: steel wheel-rail systems, monorail systems (straddle type monorail and suspended monorail), magnetic levitation systems, rubber wheel light rail systems, and the like. Among them, magnetic levitation systems currently commonly adopt several forms such as normal-conduction magnetic levitation and low-temperature superconducting magnetic levitation. For the newly emerging vacuum pipeline magnetic suspension system, the magnetic suspension technology based on the passive permanent magnet suspension technology is also applied to engineering at present. However, several magnetic levitation forms exist in the prior art, and the short plates of the technology exist.
As shown in fig. 1 and 2, for a normally conductive magnetic levitation system, the levitation is mainly performed by the attraction force generated by an electromagnetic coil, and the levitation belongs to active levitation, so that the control requirement on the levitation system is high. In addition, since no wheels are used for supporting, only the skid device is used for supporting, and in case of power failure accident, only the skid sliding friction is used for braking, which is dangerous. Wherein, in the normal electric magnetic suspension system, a guiding electromagnet 21, a magnetic conduction guide rail 22 and a suspension electromagnet 23 are arranged.
As shown in fig. 3 and 4, for a high-temperature superconducting magnetic levitation system, the permanent magnets laid along the track consume huge amounts, and it is calculated that the track is laid for 100 km of permanent magnets, so that the rare earth yield of one year of China is consumed. It is extremely uneconomical for the construction of long trunks. Wherein, in the high temperature superconductive magnetic levitation system, a superconductive coil 24, a ground coil 25, a high temperature superconductive block 26 and a permanent magnetic guide rail 27 are arranged.
As shown in fig. 5 and 6, for the low temperature superconducting magnetic levitation technology, first, the complexity of the low temperature superconducting technology itself is compared with the high temperature superconducting technology, and liquid helium for low temperature superconducting is less economical than liquid nitrogen for high temperature superconducting. Wherein, the low-temperature superconductive magnetic levitation system is also provided with a superconductive coil 24 and a ground coil 25.
For the existing magnetic levitation train designed based on the passive permanent magnet levitation technology, taking a sample car of a hypershop One company (namely a super high-speed railway company, which is a primary enterprise with headquarters located in los Angeles of the United states) in a test stage as an example, from the published video data, the magnetic levitation train adopts two levitation magnets to provide lifting force, two guiding magnets to provide guiding force, and a small wheel is used for providing support on an aluminum plate. However, since the sample vehicle is still in a principle test so far and does not bear a passenger transportation task, whether the small wheel serving as a support can adapt to a high-speed running target of the small wheel is unknown; and the magnetic levitation module and the guide module work independently, so that the structure is complex, and the engineering production is not easy.
In summary, at the present stage, there are several existing magnetic levitation transportation forms, and the limitations of the existing magnetic levitation transportation forms are all respective.
Disclosure of Invention
The invention aims to overcome the defects, and provides a magnetic levitation transportation system which solves the problem that the safety is poor when the active levitation system in the prior art brakes only by the sliding friction of a skid if a power failure accident occurs, and achieves the effect of improving the safety performance.
The invention provides a magnetic levitation transportation system, comprising: magnetic levitation module, track, linear electric motor and passive magnetic levitation train, wherein, magnetic levitation module includes: permanent magnet modules in a concave arc structure; the top surface and the bottom surface of the concave arc structure are provided with concave arc surfaces, and the side surfaces are vertical surfaces; the number of the magnetic levitation modules is two, and the two groups of the magnetic levitation modules are arranged at the bottom of the passive magnetic levitation train; the linear motor includes: a linear motor stator and a linear motor rotor; the linear motor stator is arranged on the central position of the road surface of the ballast bed in the tunnel to be operated along the travelling direction of the passive magnetic levitation train; the number of the tracks is two, and the two groups of tracks are uniformly arranged on two sides of the linear motor stator and used for forming levitation force and guiding force with the magnetic levitation module under the drive of the linear motor so that the passive magnetic levitation train runs on the tracks.
Optionally, a guide plate is further arranged on the side surface of the magnetic levitation module, and is used for enhancing the magnet utilization rate and the guide force of the permanent magnet module.
Optionally, wherein the rail is made of an L-shaped aluminum alloy profile; and/or the track, comprising: the vertical part and the horizontal part are in an L-shaped structure; the top surface of the horizontal part is provided with a concave arc surface matched with the concave arc structure of the magnetic levitation module; the vertical part is parallel to the side surface of the magnetic levitation module.
Optionally, the passive magnetic levitation train includes: a bogie and a vehicle body; the number of the bogies is two, and the two groups of bogies are arranged at the bottom of the vehicle body in front and back; each group of bogie and each group of magnetic levitation module are installed in a matched mode.
Optionally, the bogie comprises: a low floor truck; the low floor truck includes: independent wheel sets, a framework, a central connecting piece, a traction pull rod and a linear motor traction frame; the number of the frameworks is two, and the two groups of frameworks are connected in the middle through the central connecting piece; two groups of linear motor traction frames are respectively arranged at the front end and the rear end of each group of the framework; the linear motor rotor is hung under the center of the corresponding linear motor traction frame; two independent wheel pairs are respectively arranged at the front end and the rear end of each group of the framework; the two groups of traction pull rods are respectively connected between the corresponding linear motor traction frame and the central connecting piece; each group of magnetic levitation modules is arranged at the middle concave position of each group of frameworks; each set of the trusses is connected to the vehicle body at a centrally depressed location.
Optionally, the low floor type bogie further comprises: anti-hunting damper, vertical damper and transverse damper; the four groups of anti-meandering shock absorbers are respectively arranged at the outer sides of the corresponding linear motor traction frames and are arranged in a bilateral symmetry mode; the four groups of vertical shock absorbers are respectively arranged above the corresponding linear motor traction frames in a bilateral symmetry mode; two groups of transverse shock absorbers are arranged on the left side and the right side of the central connecting piece.
Optionally, the independent wheel set includes: the solid rubber wheel structure or the metal rubber composite wheel structure is used for supporting the passive magnetic levitation train and enabling the passive magnetic levitation train to run in a low-speed stage; and/or, each group of the magnetic levitation modules is collinear with the center of the corresponding independent wheel pair.
According to the scheme, the low-floor type bogie is adopted to provide support and linear driving for the vehicle; meanwhile, a permanent magnet magnetic levitation module and a magnetic levitation rail are used for providing levitation force and guiding force for the vehicle; when the train is braked emergently, the safety is greatly improved due to the adoption of a mature mechanical braking mode; the permanent magnet suspension has lower cost than the superconducting suspension, so that the method has stronger economy; meanwhile, due to the adoption of a levitation and guidance integrated magnetic levitation module technology, the structure is simpler and more reasonable, and the engineering realization capability is stronger.
Furthermore, the scheme of the invention adopts the form of the low-floor bogie and the magnetic levitation module based on the passive permanent magnet levitation technology, and the magnetic levitation module has two functions of levitation and guidance, so that the novel running mechanism has the potential of further improving the running speed, and therefore, the novel running mechanism has certain technical advantages; in addition, the low floor trucks are used to provide the train with a lower profile, thereby reducing the cross-sectional size of the vacuum duct.
According to the scheme, the passive permanent magnet suspension technology is adopted, and the low-floor type bogie, the permanent magnet magnetic suspension module with the suspension function and the guiding function and the magnetic suspension track are combined, so that the problem that in the prior art, if a power failure accident occurs in an active suspension system, the active suspension system is braked only by the sliding friction of the skid, the safety is poor is solved, and the defects of poor safety, high cost and complex structure in the prior art are overcome, and the beneficial effects of good safety, low cost and simple structure are achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of a magnetic levitation system in a low-speed magnetic levitation state;
FIG. 2 is a schematic diagram of a magnetic levitation system in a high-speed magnetic levitation state;
FIG. 3 is a schematic diagram of a low temperature superconducting magnetic levitation (EDS) system in a repulsive force levitation state;
FIG. 4 is a schematic diagram of a low temperature superconducting magnetic levitation (EDS) system in a suction levitation state, which can be seen from the example shown in FIG. 3;
FIG. 5 is a schematic diagram of a High Temperature Superconducting (HTS) magnetic levitation system in which high temperature superconducting coils are levitated, and a schematic diagram of a High Temperature Superconducting (HTS) magnetic levitation system in which high temperature superconducting blocks are levitated can be seen from the example shown in FIG. 4;
FIG. 6 is an overall layout of a running gear and its track in the magnetic levitation transport system of the present invention;
FIG. 7 is a top view of the track and linear motor stator layout in the magnetic levitation transport system of the present invention;
FIG. 8 is a front view of the track and linear motor stator layout in the magnetic levitation transport system of the present invention;
FIG. 9 is a diagram of the mounting arrangement of the running gear and the vehicle body in the magnetic levitation transportation system of the present invention;
FIG. 10 is a side elevational view of the running gear and the vehicle body of the magnetic levitation transport system of the present invention;
FIG. 11 is a front cross-sectional view of a travel mechanism in the magnetic levitation transport system of the present invention;
FIG. 12 is a left side view of the running gear of the magnetic levitation transport system of the present invention;
fig. 13 is a top view of a travel mechanism in a magnetic levitation transport system of the present invention.
In the embodiment of the present invention, reference numerals are as follows, in combination with the accompanying drawings:
1-a linear motor stator; 2-ballast bed; 3-tunneling; 4-track (e.g., L-track); 5-passive magnetic levitation train; 6-low floor trucks; 7-a vehicle body; 8-a magnetic levitation module; 9-independent wheel sets; 10-a linear motor rotor; 11-a primary suspension system; 12-frame; 13-a secondary suspension system; 14-a central connection; 15-a linear motor lifting mechanism; 16-traction tie rod; 17-a linear motor traction frame; 18-anti-hunting damper; 19-a vertical damper; 20-a transverse shock absorber; 21-a guide electromagnet; 22-magnetic guide rails; 23-suspending an electromagnet; 24-superconducting coils; 25-ground coil; 26-a high temperature superconducting block; 27-permanent magnet guide rail.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to an embodiment of the present invention, there is provided a magnetic levitation transport system. Referring to the examples shown in fig. 6 to 13, the magnetic levitation transport system may include: the magnetic levitation system comprises a magnetic levitation module 8, a track 4, a linear motor and a passive magnetic levitation train 5.
Wherein, the magnetic levitation module 8 may include: permanent magnet modules in a concave arc structure. The top surface and the bottom surface of the concave arc structure are provided with concave arc surfaces, and the side surfaces are vertical surfaces. The number of the magnetic levitation modules 8 is two, and the two groups of the magnetic levitation modules 8 are arranged at the bottom of the passive magnetic levitation train 5.
The linear motor may include: a linear motor stator 1 and a linear motor rotor 10. The linear motor stator 1 is arranged on the central position of the road surface of the ballast bed 2 in the tunnel 3 to be operated along the travelling direction of the passive magnetic levitation train 5.
The number of the tracks 4 is two, and the two groups of the tracks 4 are uniformly arranged on two sides of the linear motor stator 1 and can be used for forming levitation force and guiding force with the magnetic levitation module 8 under the driving of the linear motor, so that the passive magnetic levitation train 5 runs on the tracks 4. Wherein, concave arc magnetic levitation module and magnetic levitation track down provide levitation force promptly, provide guiding force again.
Therefore, the levitation force and the guiding force are provided for the vehicle by means of the permanent magnet levitation module and the levitation track, and the levitation and guiding integrated levitation module technology is adopted, so that the structure is simpler and more reasonable, and the stronger engineering realization capability is achieved.
Further, a guide plate is further arranged on the side surface of the magnetic levitation module 8, so that the utilization rate and the guide force of the magnet of the permanent magnet module can be enhanced.
Therefore, the utilization rate of the magnet and the guiding force of the magnetic levitation module are further enhanced through the guide plate, and the stability and the reliability of vehicle operation are improved.
Optionally, the rail 4 is made of an L-shaped aluminum alloy profile.
Optionally, the track 4 may include: the vertical part and the horizontal part are of an L-shaped structure. The top surface of the horizontal part is provided with a concave arc surface matched with the concave arc structure of the magnetic levitation module 8. The vertical part is parallel to the side surface of the magnetic levitation module 8.
Therefore, the L-shaped track can simplify the track structure, and can form reliable levitation force and guiding force with the magnetic levitation module, thereby being beneficial to improving the safety and reliability of vehicle operation.
In an alternative example, the passive magnetic levitation train 5 may include: a bogie and a vehicle body 7.
The number of the bogies is two, and the bogies are arranged at the bottom of the vehicle body 7 in front and back. Each group of bogie is matched with each group of magnetic levitation module 8.
Therefore, the passive magnetic levitation train is formed by matching the bogie with the train body, the structure is simple, and the running flexibility of the train is good.
Further, the bogie may include: a low floor bogie 6. The low floor truck 6 may include: independent wheel set 9, frame 12, central link 14, traction tie 16 and linear motor traction frame 17.
Wherein the number of frames 12 is two, two sets of frames 12 being connected in the middle by means of the central connection 14. Two groups of linear motor traction frames 17 are respectively arranged at the front end and the rear end of each group of the framework 12. The linear motor mover 10 is suspended directly below the center of the corresponding linear motor traction frame 17. Two independent wheel sets 9 are respectively arranged at the front end and the rear end of each group of the framework 12. The two groups of traction rods 16 are respectively connected between the corresponding linear motor traction frame 17 and the central connecting piece 14. Each set of the magnetic levitation modules 8 is installed at a central concave position of each set of the frameworks 12. Each set of the frames 12 is connected to the vehicle body 7 at a centrally depressed position.
Therefore, the low-floor type bogie is formed by the independent wheel set, the framework, the central connecting piece, the traction pull rod, the linear motor traction frame and the like, the structure is simple, the reliability is good, the whole height of the vehicle is reduced, the space capacity of the tunnel occupied by the vehicle is reduced, and the cost is low.
Further, the low floor type bogie 6 may further include: anti-hunting damper 18, vertical damper 19 and lateral damper 20.
Wherein, four groups of anti-meandering dampers 18 are respectively arranged at the outer sides of the corresponding linear motor traction frames 17 in a bilateral symmetry mode. The four groups of vertical shock absorbers 19 are respectively arranged above the corresponding linear motor traction frames 17 in a bilateral symmetry mode. Two sets of the lateral dampers 20 are mounted on the left and right sides of the center link 14.
Therefore, vibration in the running process of the vehicle can be reduced through various shock absorbers, the running environment of the vehicle is improved, and the user experience is improved.
Alternatively, the independent wheel set 9 may include: a solid rubber wheel structure or a metal rubber composite wheel structure may be used to support the passive magnetic levitation train 5 and to operate the passive magnetic levitation train 5 in a low speed phase.
Therefore, the independent wheel set which supports the vehicle and enables the vehicle to run in a low-speed stage is simple in structure, and the running reliability and safety of the vehicle can be improved.
Optionally, each set of said magnetic levitation modules 8 is collinear with the centre of the corresponding independent wheel pair 9.
Therefore, the levitation and operation reliability and safety can be improved by making the magnetic levitation module collinear with the center of the independent wheel set.
In an alternative embodiment, the present invention provides a novel running gear and its track in order to solve the problems of the prior art. The running mechanism and the track are based on a passive permanent magnet suspension technology, and a low-floor bogie and a permanent magnet suspension technology are combined. The running mechanism and the track thereof adopt a low-floor bogie to provide support and linear driving for the vehicle, and simultaneously provide levitation force and guiding force for the vehicle by means of the permanent magnet levitation module and the levitation track. In this way, when the train is in emergency braking, due to the adoption of a mature mechanical braking mode, the safety is greatly improved; the permanent magnet suspension has lower cost than the superconducting suspension, so that the method has stronger economy; meanwhile, due to the adoption of a levitation and guiding integrated magnetic levitation module technology, the structure is simpler and more reasonable, compared with a sample vehicle which adopts two levitation magnets to provide lifting force, two guiding magnets to provide guiding force and simultaneously has small wheels to provide support on an aluminum plate, the sample vehicle has stronger engineering realization capability.
That is, the novel running mechanism and the track thereof have safer braking performance than the traditional normal magnetic suspension form, and are more mature especially in emergency braking; meanwhile, the method has stronger economy than a superconducting magnetic suspension form, and the construction cost is lower; in addition, the low-floor bogie and magnetic levitation module form based on the passive permanent magnet levitation technology is adopted, and the magnetic levitation module has two functions of levitation and guidance, so that the novel running mechanism has the potential of further improving the running speed, and has certain technical advantages; in addition, the novel running mechanism and the track thereof are also suitable for a vacuum pipeline magnetic suspension system, and the train has a lower profile due to the adoption of the low-floor bogie, so that the section size of the vacuum pipeline is reduced.
In an alternative example, in the scheme of the invention, the novel running mechanism and the novel track type have better braking capability and stronger safety due to the adoption of wheels as a supporting and low-speed driving mechanism; the magnetic levitation module and the guide module are integrated, so that the structure is simpler, and the layout is more reasonable; the guidance of the track is more perfect, the centering adaptability and the self-correction capability are stronger, and the phenomenon that the train is derailed and overturned is avoided; due to the adoption of the low-floor type bogie, the lower overall dimension is obtained, so that the low-floor type bogie has smaller occupied space of a tunnel and higher economical efficiency.
Preferably, in the scheme of the invention, the concave arc magnetic levitation module, the magnetic levitation track and the concave arc track can be used as wheel track tracks, side surface guide of the arc track and other realization modes.
In an alternative specific embodiment, the scheme of the invention mainly aims to solve the technical problems of the existing magnetic levitation train, such as safety and economy, and the complex structure of the existing levitation and guiding mechanism of the magnetic levitation train. Therefore, the scheme of the invention realizes the driving and levitation actions of the passive magnetic levitation train by designing a running mechanism and a track thereof based on the passive permanent magnet levitation technology; meanwhile, the running mechanism and the track are suitable for a vacuum pipeline transportation system, and have the potential of further improving the running speed in a vacuum pipeline.
Specifically, the running mechanism adopts a combination mode of a low-floor bogie and a magnetic levitation module and is driven by a linear motor. At the low speed stage, the vehicle wheels travel on the track, and meanwhile, the magnetic levitation module interacts with the aluminum alloy track, and the permanent magnets of the magnetic levitation module cut magnetic force lines, so that upward lifting force is generated on the track. When the train reaches a certain speed, the train floats along with the increase of the lifting force, and gradually enters a stable cruising stage. When the train is braked, firstly, the linear motor is used for carrying out eddy current braking, along with the reduction of the running speed, the lifting force generated by the magnetic levitation module and the track is gradually reduced, the train falls onto the track again, and then, the wheels are used for realizing mechanical braking, and finally, the train is stably stopped at a station platform. The L-shaped track not only provides upward lifting force for the running mechanism, but also provides guiding force for the side surface, so that the train can safely run in the track all the time.
The running mechanism and the track thereof are particularly suitable for being used in a vacuum pipeline, and the running mechanism and the track thereof of the invention are specifically described below by taking the operation in the vacuum pipeline as an example:
the running gear can be operated in a closed tunnel 3. The tunnel 3 is internally paved with a ballast bed 2, a linear motor stator 1 is arranged at the center of the road surface of the ballast bed 2 along the travelling direction of the tunnel, and L-shaped tracks 4 are uniformly arranged on two sides of the linear motor stator 1. A passive magnetic levitation train 5 consisting of a low-floor bogie 6 and a car body 7 is operated on the track 4.
Alternatively, the low floor bogie 6 is mainly composed of a semicircular magnetic levitation module 8, an independent wheel set 9, a linear motor rotor 10, a framework 12, a central connecting piece 14, a traction pull rod 16, a linear motor traction frame 17, an anti-meandering damper 18, a vertical damper 19, a transverse damper 20 and the like.
Wherein the frame 12 is located on either side of the truck, and is of 100% low-floor design, and is centrally connected by a central connection 14. The front and rear ends of the two groups of frames 12 are respectively fixed with two groups of linear motor traction frames 17. Two independent wheel sets 9 are respectively fixed below the front end and the rear end of each group of frameworks 12. The independent wheel set 9 is in a combined form of a solid rubber wheel and a metal wheel shaft, and plays a role in supporting and low-speed stage operation. The magnetic levitation module 8 is arranged in the lower recess of the framework 12, and the center of the magnetic levitation module is collinear with the center of the independent wheel pair 9. Two groups of traction pull rods 16 are respectively connected between a linear motor traction frame 17 and a central connecting piece 14, and four groups of anti-meandering shock absorbers 18 are respectively arranged on the outer side of the linear motor traction frame 17 and are symmetrically arranged left and right. Four groups of vertical shock absorbers 19 are respectively arranged above the linear motor traction frame 17 in a bilateral symmetry manner. Two sets of transverse shock absorbers 20 are mounted on the left and right sides of the center connector 14.
The two groups of low-floor bogies 6 are respectively arranged at the front end and the rear end of the passive magnetic levitation train 5 along the track travelling direction and always run in the track 4. The track 4 is made of L-shaped aluminum alloy sections, the bottom surface is arc-shaped and parallel to the circular ring part of the magnetic levitation module 8, and the side surface is parallel to the vertical surface of the magnetic levitation module 8.
Specifically, the running process of the running mechanism and the track thereof is as follows:
the passive magnetic suspension train 5 is supported on the track 4 by four independent wheel sets 9 in a stop stage and a low-speed stage of operation, and is driven to advance by a linear motor rotor 10 and a linear motor stator 1 together during starting. At this time, the magnetic levitation module 8 composed of the neodymium-iron-boron permanent magnets and the track 4 cut magnetic force lines to generate upward lifting force, and after a certain speed is reached, the passive magnetic levitation train 5 realizes levitation and continues to be driven to a cruising speed by the linear motor. During braking, the linear motor is reversed, the passive magnetic levitation train 5 is decelerated, the lifting force gradually decreases along with the reduction of the speed, the passive magnetic levitation train 5 falls onto the track 4 after the speed is reduced to a certain speed, and the independent wheel set 9 mechanically brakes until the passive magnetic levitation train stops. All the while, the L-shaped side surface of the track 4 and the vertical surface of the magnetic levitation module 8 generate guiding force, so that the passive magnetic levitation train 5 is ensured to always run along the central line of the track 4. The circular arc-shaped bottom surface of the track 4 also ensures self-centering, so that the passive magnetic levitation vehicle 5 can also keep running along the center of the track in the low-speed stage.
After the tunnel is vacuumized, the influence of air resistance on the passive magnetic levitation train 5 is greatly reduced, even can be ignored, the running speed of the passive magnetic levitation train is greatly improved, the passive magnetic levitation train can run at high speed or ultra-high speed, and a good speed-increasing space is provided.
The above process shows that the independent wheel set 9 is used as the support of the running mechanism and the driving mechanism in low speed stage, so that the skid mechanism has excellent braking performance and high safety.
The magnetic levitation module 8 forms upward lifting force by utilizing the circular ring surface of the bottom and the circular arc surface of the track 4, and forms guiding force by utilizing the vertical surface of the side surface of the magnetic levitation module 8 and the vertical surface of the track 4, so that the magnetic levitation module and the guiding module are perfectly integrated together. Compared with the existing high-speed constant magnetic levitation train and other super high-speed railway sample trains (the magnetic levitation module and the guide module work independently) based on the maglpane principle, the levitation and guide structure is simpler and easier to engineer. Compared with the traditional magplane integral type circular arc magnetic levitation module, the invention adopts the structural form of two groups of magnetic levitation modules which are respectively arranged at two sides of the running mechanism, is more similar to a double-engine layout mode of a civil aircraft, and is more reasonable in dynamics.
When the passive magnetic levitation train 5 runs in the low-speed stage, the independent wheel set 9 runs on the arc surface of the track 4, and the passive magnetic levitation train 5 ensures the guidance of the low-speed stage due to the self-centering characteristic of the arc surface. After the passive magnetic levitation train 5 floats at a certain speed, the side surface of the magnetic levitation module 8 and the vertical surface of the track 4 form a guiding force, so that the passive magnetic levitation train can safely run along the track at a high speed stage, and the phenomena of derailment, overturning and the like at a turning stage can not occur.
Compared with trains of other systems, the passive magnetic levitation train 5 based on the passive permanent magnet levitation technology has a better accelerating space. Is particularly suitable for running in a vacuum pipeline. Even though the common wheel-rail vehicle runs in the vacuum pipeline, the mechanical resistance caused by the wheel rail is an important factor for further accelerating the vehicle even though the vehicle has no air resistance restriction. The superconducting maglev train also has good speed-increasing space, but the liquid helium preparation technology required by the superconducting maglev train is complex because the consumption of permanent magnets by the track used by the high-temperature superconducting maglev train is too large, and the economy is not as good as that of the passive maglev train 5 based on the passive permanent magnet levitation technology.
Because of the low floor type bogie, the bogie has lower overall size than the traditional bogie. If the air-conditioning system runs in the vacuum pipeline, the air resistance is not involved, so that the required tunnel cross-section size is further reduced, and the construction cost of the tunnel is reduced.
In addition, the bottom surface of the rail 4 is not limited to a circular arc shape, and may be a horizontal bottom surface; likewise, the ring form of the magnetic levitation module 8 is also rectangular. That is, the combination of the L-shaped rail 4 and the levitation module 8 is not limited to the bottom surface form described above, and is protected by the present invention.
In summary, the scheme of the invention can at least achieve the following beneficial effects:
(1) The low-floor type bogie is used for providing support and linear driving for the vehicle, wheels are preferably used as driving mechanisms for supporting and running at a low speed, and the vehicle has better braking capability and stronger safety than the conventional constant-magnetic levitation train.
(2) The magnetic levitation module and the guide module are integrated into a whole, the structure is simpler, and the layout is more reasonable. Compared with the existing super high-speed rail sample cars based on the passive permanent magnet suspension technology, the method is easier to realize engineering manufacture.
(3) The guidance of the track is more perfect, the self-correcting capability is stronger, and the phenomenon of derailment and overturning of the train is avoided.
(4) The passive magnetic levitation technology based on the passive permanent magnet levitation technology has higher accelerating space compared with a common wheeltrack train, has better economy compared with a superconducting magnetic levitation train, and is suitable for the ultrahigh-speed requirement of a vacuum pipeline.
(5) Due to the adoption of the low-floor bogie structure, the lower overall dimension is obtained, so that the section of a tunnel for the period of operation is greatly reduced, and the tunnel construction cost is reduced.
Through a large number of experiments, the technical scheme of the invention is adopted, and the low-floor bogie is adopted to provide support and linear driving for the vehicle; meanwhile, a permanent magnet magnetic levitation module and a magnetic levitation rail are used for providing levitation force and guiding force for the vehicle; when the train is braked emergently, the safety is greatly improved due to the adoption of a mature mechanical braking mode; the permanent magnet suspension has lower cost than the superconducting suspension, so that the method has stronger economy; meanwhile, due to the adoption of a levitation and guidance integrated magnetic levitation module technology, the structure is simpler and more reasonable, and the engineering realization capability is stronger.
In summary, it is readily understood by those skilled in the art that the above-described advantageous ways can be freely combined and superimposed without conflict.
The above description is only an example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (3)

1. A magnetic levitation transport system, comprising: the device comprises a magnetic levitation module (8), a track (4), a linear motor and a passive magnetic levitation train (5), wherein the track (4) is a magnetic levitation track; wherein, the liquid crystal display device comprises a liquid crystal display device,
the magnetic levitation module (8) comprises: permanent magnet modules in a concave arc structure; the top surface and the bottom surface of the concave arc structure are provided with concave arc surfaces, and the side surfaces are vertical surfaces; the number of the magnetic levitation modules (8) is two, and the two groups of the magnetic levitation modules (8) are arranged at the bottom of the passive magnetic levitation train (5); the concave arc-shaped magnetic levitation module and the magnetic levitation track provide levitation force and guiding force; the levitation force and the guiding force are provided for the vehicle by means of the magnetic levitation module and the magnetic levitation rail, and a levitation and guiding integrated magnetic levitation module technology is adopted;
the linear motor includes: a linear motor stator (1) and a linear motor rotor (10); the linear motor stator (1) is arranged on the central position of the road surface of the ballast bed (2) in the tunnel (3) to be operated along the travelling direction of the passive magnetic levitation train (5);
the number of the tracks (4) is two, and the two groups of the tracks (4) are uniformly arranged at two sides of the linear motor stator (1) and used for forming levitation force and guiding force with the magnetic levitation module (8) under the drive of the linear motor so that the passive magnetic levitation train (5) runs on the tracks (4);
the passive magnetic levitation train (5) comprises: a bogie and a vehicle body (7); the number of the bogies is two, and the two groups of bogies are arranged at the bottom of the vehicle body (7) in front and back; each group of bogie is installed in a matched mode with each group of magnetic levitation modules (8);
the bogie comprises: -a low floor bogie (6); the low floor bogie (6) comprises: the device comprises an independent wheel set (9), a framework (12), a central connecting piece (14), a traction pull rod (16) and a linear motor traction frame (17); wherein the number of the frameworks (12) is two, and the two groups of frameworks (12) are connected in the middle through the central connecting piece (14); two groups of linear motor traction frames (17) are respectively arranged at the front end and the rear end of each group of the framework (12); the linear motor rotor (10) is hung under the center of the corresponding linear motor traction frame (17); two independent wheel pairs (9) are respectively arranged at the front end and the rear end of each group of the framework (12); the two groups of traction pull rods (16) are respectively connected between the corresponding linear motor traction frame (17) and the central connecting piece (14); each group of magnetic levitation modules (8) is arranged at the middle concave position of each group of frameworks (12); -each set of said frames (12) is connected to said body (7) at a central concave position; the low-floor bogie is formed by the independent wheel set, the framework, the central connecting piece, the traction pull rod and the linear motor traction frame, so that the overall height of the vehicle is reduced, and the space capacity of the tunnel occupied by the vehicle is reduced;
the side surface of the magnetic levitation module (8) is also provided with a guide plate for enhancing the magnet utilization rate and the guide force of the permanent magnet module;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the track (4) is made of L-shaped aluminum alloy sections;
the track (4) comprises: the vertical part and the horizontal part are in an L-shaped structure; the top surface of the horizontal part is provided with a concave arc surface matched with the concave arc structure of the magnetic levitation module (8); the vertical part is parallel to the side surface of the magnetic levitation module (8).
2. The system according to claim 1, characterized in that the low floor bogie (6) further comprises: an anti-meandering damper (18), a vertical damper (19) and a lateral damper (20); wherein, the liquid crystal display device comprises a liquid crystal display device,
the four groups of anti-meandering shock absorbers (18) are respectively arranged at the outer sides of the corresponding linear motor traction frames (17) and are arranged in a bilateral symmetry mode;
the four groups of vertical shock absorbers (19) are respectively arranged above the corresponding linear motor traction frames (17) in a bilateral symmetry mode;
two sets of said transverse shock absorbers (20) are mounted on the left and right sides of said central connection (14).
3. The system of claim 1 or 2, wherein,
the independent wheel set (9) comprises: a solid rubber wheel structure or a metal rubber composite wheel structure for supporting the passive magnetic levitation train (5) and operating the passive magnetic levitation train (5) in a low-speed phase;
and/or the number of the groups of groups,
each group of the magnetic levitation modules (8) is collinear with the center of the corresponding independent wheel pair (9).
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CN110422181A (en) * 2019-09-03 2019-11-08 北京九州动脉隧道技术有限公司 A kind of track compensation device of passive type magnetic suspension train
CN111284330B (en) * 2020-02-17 2023-01-31 上海交通大学 High-temperature superconducting electric magnetic suspension train
CN111921477B (en) * 2020-08-14 2021-09-14 昆明理工大学 Method and device for magnetic suspension supergravity enhanced reaction
CN112298239B (en) * 2020-11-01 2022-02-01 成都西交领创科技有限公司 Middle-arranged long-stator high-speed permanent magnet maglev train suspension frame and running system
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