Magnetic levitation equipment and eddy current braking system thereof

Abstract

The utility model discloses magnetic levitation equipment and an eddy current braking system thereof, and relates to the technical field of rail transit, and the eddy current braking system comprises a levitation frame, a permanent magnet eddy current brake and a telescopic adjusting device. The permanent magnet eddy current brake is movably arranged on the suspension frame, the permanent magnet eddy current brake comprises a mounting seat and a permanent magnet assembly, and the permanent magnet assembly is arranged in the mounting seat in the longitudinal direction and used for generating eddy current braking force; the telescopic adjusting device is connected with the suspension frame and the permanent magnet eddy current brake and used for adjusting the gap between the permanent magnet eddy current brake and the guide face of the maglev train, and eddy current braking force on the maglev train is controlled. According to the eddy current braking system, the gaps between the permanent magnet assemblies and the guide face of the maglev train can be adjusted so as to control the eddy current braking force, and meanwhile, the permanent magnet assemblies are arranged in the longitudinal direction so that the eddy current braking force needed under the emergency braking working condition can be provided while normal working condition running of the train is not disturbed; therefore, the requirement for emergency braking of the maglev train is met.

Description

Technical Field

[0001] The present application relates to the field of rail transportation technology, and in particular to an eddy current braking system. The present application also relates to a magnetic levitation device having the eddy current braking system. Background Art

[0002] At present, with the increasing demand for fast and safe travel, the research and development of high-speed and even ultra-high-speed maglev trains and their ancillary equipment has become a research hotspot in the field of rail transit in recent years.

[0003] In the existing system, since the design speed of high-speed maglev trains generally exceeds 500 km / h, the emergency braking system (or eddy current braking system) plays a very important role in the operation safety of the train. However, the current eddy current braking system still cannot provide the eddy current braking force required in emergency braking conditions without interfering with the normal operation of the train. Therefore, as the design speed of maglev trains continues to increase, how to obtain higher and more reliable eddy current braking force becomes more important. Utility Model Content

[0004] The purpose of the present application is to provide an eddy current braking system that can provide the eddy current braking force required in emergency braking conditions without interfering with the normal operation of the train. Another purpose of the present application is to provide a magnetic levitation device including the above eddy current braking system.

[0005] To achieve the above objectives, the present application provides an eddy current braking system for braking a maglev train, comprising:

[0006] Suspension rack;

[0007] A permanent magnet eddy current brake is movably arranged on the suspension frame, and the permanent magnet eddy current brake comprises a mounting seat and a permanent magnet assembly arranged in the mounting seat along the longitudinal direction, and the permanent magnet assembly is used to generate a magnetic field to generate an eddy current braking force;

[0008] The telescopic adjustment device connects the suspension frame and the permanent magnet eddy current brake and is used to drive the permanent magnet eddy current brake to move laterally to adjust the gap between the permanent magnet eddy current brake and the guide surface of the maglev train, thereby controlling the eddy current braking force on the maglev train.

[0009] In some embodiments, the telescopic adjustment device includes:

[0010] A tie rod assembly connected to a mounting base;

[0011] Two hydraulic cylinder assemblies are installed on the suspension frame and connected to the pull rod assembly, and are used to drive the pull rod assembly so that the pull rod assembly drives the permanent magnet eddy current brake to move.

[0012] In some embodiments, the tie rod assembly includes:

[0013] The pull rod shaft is fixed in the mounting seat;

[0014] Two elastic pull rods, one end of the two elastic pull rods is rotatably connected to the pull rod rotating shaft, and the other ends of the two elastic pull rods are respectively connected to the two hydraulic cylinder assemblies.

[0015] In some embodiments, a first elastic round head and a second elastic round head are respectively provided at both ends of any elastic pull rod, and the axis of the first elastic round head is perpendicular to the axis of the second elastic round head.

[0016] In some embodiments, any elastic pull rod is connected to the corresponding hydraulic cylinder assembly via a connecting seat.

[0017] In some embodiments, the connector is a V-shaped connector.

[0018] In some embodiments, the mounting base includes a base and a protective cover fixed on the base, and the protective cover is used to install the permanent magnet assembly to protect the permanent magnet assembly.

[0019] The present application also provides a maglev device, including a maglev train and an eddy current braking system as described in any one of the above items, wherein the eddy current braking system is used to brake the maglev train.

[0020] Compared with the above background technology, the eddy current brake system provided in the embodiment of the present application is used for braking a maglev train, and includes a suspension frame, a permanent magnet eddy current brake, and a telescopic adjustment device. Among them, the permanent magnet eddy current brake can be movably arranged on the suspension frame, and the permanent magnet eddy current brake includes a mounting seat and a permanent magnet assembly, and the permanent magnet assembly is arranged in the mounting seat along the longitudinal direction, and the permanent magnet assembly is used to generate a unilateral high-intensity magnetic field, and interact with the guide surface of the maglev train to generate eddy current braking force; the telescopic adjustment device connects the suspension frame and the permanent magnet eddy current brake, and the telescopic adjustment device is used to drive the permanent magnet eddy current brake to move in the lateral direction to adjust the gap between the permanent magnet eddy current brake and the guide surface of the maglev train, so as to control the eddy current braking force on the maglev train. It can be seen that the eddy current braking system works mainly by adjusting the gap between the permanent magnet assembly and the guide surface of the maglev train through the telescopic adjustment device to control the eddy current braking force. At the same time, the permanent magnet assembly is arranged longitudinally to provide the eddy current braking force required under emergency braking conditions without interfering with the normal operation of the train, thereby meeting the needs of emergency braking in sudden situations during high-speed operation of the maglev train. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the structure of the eddy current braking system in the embodiment of the present application;

[0023] Figure 2 for Figure 1 The schematic diagram of the arrangement of the permanent magnet components in the eddy current braking system shown;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of a hydraulic cylinder assembly in an eddy current brake system;

[0025] Figure 4 for Figure 1 A schematic diagram of the structure of the tie rod assembly in the eddy current brake system shown;

[0026] Figure 5 for Figure 4 A schematic diagram of the structure of a pull rod rotating shaft in the pull rod assembly shown;

[0027] Figure 6 for Figure 1 A schematic diagram of the structure of the connecting seat in the eddy current braking system shown;

[0028] Figure 7 for Figure 1 Schematic diagram of the structure of the base in the eddy current braking system shown.

[0029] in:

[0030] 10-suspension frame, 11-support arm;

[0031] 20-permanent magnet eddy current brake, 21-mounting seat, 211-base, 212-protective cover, 22-permanent magnet assembly;

[0032] 30-telescopic adjustment device, 31-pull rod assembly, 311-pull rod rotating shaft, 312-elastic pull rod, 3121-first elastic round head, 3122-second elastic round head, 32-hydraulic cylinder assembly, 33-connecting seat, 331-pin hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] It should be noted that the directional words such as "upper end, lower end, left side, right side" described below are all defined based on the drawings in the specification.

[0036] Please refer to Figures 1 to 7 , Figure 1 This is a schematic diagram of the structure of the eddy current braking system in the embodiment of the present application; Figure 2 for Figure 1 The schematic diagram of the arrangement of the permanent magnet components in the eddy current braking system shown; Figure 3 for Figure 1 A schematic diagram of the structure of a hydraulic cylinder assembly in an eddy current brake system; Figure 4 for Figure 1 A schematic diagram of the structure of the tie rod assembly in the eddy current brake system shown; Figure 5 for Figure 4 A schematic diagram of the structure of a pull rod rotating shaft in the pull rod assembly shown; Figure 6 for Figure 1 A schematic diagram of the structure of the connecting seat in the eddy current braking system shown; Figure 7 for Figure 1 Schematic diagram of the structure of the base in the eddy current braking system shown.

[0037] The eddy current braking system provided in the embodiment of the present application is mainly applied in high-speed maglev trains. The eddy current braking system includes a suspension frame 10 , a permanent magnet eddy current brake 20 and a telescopic adjustment device 30 .

[0038] Among them, the permanent magnet eddy current brake 20 can be movably arranged on the suspension frame 10, and the permanent magnet eddy current brake 20 includes a mounting seat 21 and a permanent magnet assembly 22. The permanent magnet assembly 22 is arranged longitudinally in the mounting seat 21, and the permanent magnet assembly 22 is used to generate a unilateral high-intensity magnetic field and interact with the guide surface of the maglev train to generate eddy current braking force; the telescopic adjustment device 30 connects the suspension frame 10 and the permanent magnet eddy current brake 20, so that the permanent magnet eddy current brake 20 is arranged between the support arms 11 of the suspension frame 10, and the telescopic adjustment device 30 is used to drive the permanent magnet eddy current brake 20 to move horizontally to adjust the gap between the permanent magnet eddy current brake 20 and the guide surface of the maglev train, so as to control the eddy current braking force on the maglev train.

[0039] It should be noted that the so-called longitudinal direction refers to the length direction or running direction of the maglev train, and the so-called transverse direction refers to the width direction of the maglev train or the direction perpendicular to the track, and the transverse direction is always perpendicular to the longitudinal direction.

[0040] Of course, according to actual needs, the permanent magnet assembly 22 can adopt a Halbach permanent magnet array (Halbach array is a magnet structure, which is an approximately ideal structure in engineering, and the goal is to use the least amount of magnets to generate the strongest magnetic field). The Halbach permanent magnet array can generate a large braking force and can meet the demand for braking force under the trend of speeding up the maglev train. In this embodiment, the Halbach permanent magnet array generates a unilateral high-intensity magnetic field and interacts with the guide surface of the high-speed maglev train to generate eddy current braking force.

[0041] It can be seen that the eddy current braking system works mainly by adjusting the gap between the permanent magnet assembly 22 and the guide surface of the maglev train through the telescopic adjustment device 30 to control the eddy current braking force. At the same time, the permanent magnet assembly 22 is arranged longitudinally so as to provide the eddy current braking force required under emergency braking conditions without interfering with the normal operation of the train, thereby meeting the needs of emergency braking of the maglev train in sudden situations during high-speed operation.

[0042] In this embodiment, the eddy current braking system mainly includes two states:

[0043] Non-working state: In this state, the telescopic adjustment device 30 is in a retracted state, the permanent magnet eddy current brake 20 is pulled away from the guide surface of the maglev train, no braking force is generated, and the normal operation of the maglev train will not be disturbed.

[0044] Working state: In this state, the telescopic adjustment device 30 is in an extended state, and the permanent magnet eddy current brake 20 is pushed toward the guide surface of the maglev train to generate eddy current braking force to perform emergency braking of the maglev train.

[0045] In some embodiments, the telescopic adjustment device 30 includes a pull rod assembly 31 and two hydraulic cylinder assemblies 32 .

[0046] The hydraulic cylinder assembly 32 is used to control the forward and backward travel of the eddy current brake system, which is clean, environmentally friendly and reduces energy consumption.

[0047] Among them, the tie rod assembly 31 is connected to the mounting seat 21, and two hydraulic cylinder assemblies 32 are installed on the suspension frame 10. The two hydraulic cylinder assemblies 32 connect the two ends of the tie rod assembly 31. The two hydraulic cylinder assemblies 32 are used to drive the tie rod assembly 31 so that the tie rod assembly 31 drives the permanent magnet eddy current brake 20 to move.

[0048] Specifically, two hydraulic cylinder assemblies 32 are respectively arranged on both sides of the permanent magnet eddy current brake 20, the middle of the tie rod assembly 31 is connected to the mounting seat 21, and both ends of the tie rod assembly 31 extend out of the mounting seat 21 and are respectively connected to the two hydraulic cylinder assemblies 32. In this way, the permanent magnet assembly 22 between the two hydraulic cylinders is driven to approach or move away from the guide surface of the maglev train through the telescopic movement of the two hydraulic cylinders.

[0049] Furthermore, any hydraulic cylinder assembly 32 includes a support and at least one hydraulic cylinder arranged in the support. For example, it can be preferably arranged that two hydraulic cylinders are arranged in one support. The support is located on the inner side of the support arm 11 of the suspension frame 10. In this way, the inner space of the support arm 11 of the suspension frame 10 can be fully utilized, thereby reducing the utilization rate of the external space of the support arm 11 of the suspension frame 10. The hydraulic cylinder and the support are connected by bolts.

[0050] In some embodiments, the rod assembly 31 includes a rod shaft 311 and two elastic rods 312 .

[0051] The pull rod shaft 311 is fixed in the mounting seat 21 through a positioning pin, one end of the two elastic pull rods 312 is rotatably connected to the pull rod shaft 311 , and the other ends of the two elastic pull rods 312 are respectively connected to the two hydraulic cylinder assemblies 32 .

[0052] That is to say, one end of an elastic pull rod 312 is rotationally connected to the first end of the pull rod shaft 311, and the other end is connected to the hydraulic cylinder assembly 32 at one end; one end of another elastic pull rod 312 is rotationally connected to the second end of the pull rod shaft 311, and the other end is connected to the hydraulic cylinder assembly 32 at the other end.

[0053] In some embodiments, a first elastic round head 3121 and a second elastic round head 3122 are respectively provided at both ends of any elastic pull rod 312, the first elastic round head 3121 is connected to the hydraulic cylinder assembly 32, the second elastic round head 3122 is rotatably connected to the pull rod shaft 311 through a rotating pin, and the axis of the first elastic round head 3121 is perpendicular to the axis of the second elastic round head 3122.

[0054] In this way, when the first elastic round head 3121 is thrust by the hydraulic cylinder assembly 32, the second elastic round head 3122 can rotate relative to the pull rod shaft 311, and after rotation, pull the pull rod shaft 311 and the permanent magnet eddy current brake 20 to move, so that the permanent magnet eddy current brake 20 can be moved closer to or away from the guide surface of the maglev train.

[0055] In some embodiments, any elastic pull rod 312 is connected to the corresponding hydraulic cylinder assembly 32 via a connecting seat 33 .

[0056] Preferably, the connection seat 33 is a V-shaped connection seat 33 .

[0057] Specifically, the V-shaped connection seat 33 has a pin hole 331, and the first elastic round head 3121 of the elastic pull rod 312 is connected to the V-shaped connection seat 33 through a connecting pin. The V-shaped connection seat 33 also has two connecting ends, which are respectively connected to the two hydraulic cylinder assemblies 32.

[0058] In some embodiments, the mounting base 21 includes a base 211 and a protective cover 212 fixed on the base 211 . The protective cover 212 is used to mount the permanent magnet assembly 22 to protect the permanent magnet assembly 22 .

[0059] It can be understood that a protective cover 212 is set outside the permanent magnet, and a positioning pin hole is provided on the top of the protective cover 212. The permanent magnet is fixedly installed on the top of the protective cover 212 along the longitudinal direction. The protective cover 212 has the function of protecting and isolating the magnetic field of the permanent magnet to avoid interfering with the normal operation of the maglev train.

[0060] In addition, the entire mounting seat 21 is a hollow structure, which can reduce weight while ensuring strength.

[0061] The overall structure of the eddy current braking system is reliable and can generate eddy current braking force without the need for an excitation current. At the same time, the above connection scheme can effectively utilize the installation space between the bracket arms 11, and the structure is compact and easy to disassemble.

[0062] A maglev device provided in the present application includes a maglev train and an eddy current braking system described in the above specific embodiment, wherein the eddy current braking system is used to brake the maglev train; other parts of the maglev device can refer to the prior art and will not be elaborated in this article.

[0063] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0064] The above is a detailed introduction to the magnetic levitation equipment and eddy current braking system provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the scheme of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. An eddy current braking system for braking a maglev train, characterized in that: include: Suspension rack; A permanent magnet eddy current brake is movably arranged on the suspension frame, the permanent magnet eddy current brake comprises a mounting seat and a permanent magnet assembly arranged longitudinally in the mounting seat, the permanent magnet assembly is used to generate a magnetic field to generate an eddy current braking force; The telescopic adjustment device is connected to the suspension frame and the permanent magnet eddy current brake, and is used to drive the permanent magnet eddy current brake to move laterally to adjust the gap between the permanent magnet eddy current brake and the guide surface of the maglev train, thereby controlling the eddy current braking force on the maglev train.

2. The eddy current braking system according to claim 1, characterized in that: The telescopic adjustment device comprises: A pull rod assembly connected to the mounting seat; Two hydraulic cylinder assemblies are installed on the suspension frame and connected to the pull rod assembly, and are used to drive the pull rod assembly so that the pull rod assembly drives the permanent magnet eddy current brake to move.

3. The eddy current braking system according to claim 2, characterized in that: The tie rod assembly comprises: A pull rod rotating shaft is fixed in the mounting seat; Two elastic pull rods, one end of the two elastic pull rods is rotatably connected to the pull rod rotating shaft, and the other end of the two elastic pull rods is respectively connected to the two hydraulic cylinder assemblies.

4. The eddy current braking system according to claim 3, characterized in that: A first elastic round head and a second elastic round head are respectively provided at two ends of any of the elastic pull rods, and the axis of the first elastic round head is perpendicular to the axis of the second elastic round head.

5. The eddy current braking system according to claim 3, characterized in that: Any of the elastic pull rods is connected to the corresponding hydraulic cylinder assembly via a connecting seat.

6. The eddy current braking system according to claim 5, characterized in that: The connecting seat is a V-shaped connecting seat.

7. The eddy current braking system according to any one of claims 1 to 6, characterized in that: The mounting seat comprises a base and a protective cover fixed on the base, and the protective cover is used for mounting the permanent magnet assembly to protect the permanent magnet assembly.

8. A magnetic levitation device, comprising a magnetic levitation train, characterized in that: It also includes an eddy current braking system as described in any one of claims 1 to 7, wherein the eddy current braking system is used to brake the maglev train.

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