CN110939026A

CN110939026A - Magnetic suspension track beam

Info

Publication number: CN110939026A
Application number: CN201911175688.6A
Authority: CN
Inventors: 文望青; 曾敏; 严爱国; 张玲; 曹文杰; 陈冲; 李靖; 林骋; 王志平; 胡方杰; 饶少臣; 杨朝龙; 杨光; 赵剑锋
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-03-31

Abstract

The invention is suitable for belonging to the magnetic suspension rail traffic field, the magnetic suspension rail beam that the invention provides, the magnetic suspension rail beam includes: the bottom plate and set up the girder more than two on the bottom plate upper surface, the bottom plate has seted up ventilation structure. Through the arrangement, the ventilation structure is arranged on the bottom plate, high-speed airflow generated above the bottom plate when a train runs can be guided out through the ventilation structure, and aerodynamic force generated by the high-speed airflow on the bottom plate can be reduced, so that adverse effects of the aerodynamic force on a track are reduced.

Description

Magnetic suspension track beam

Technical Field

The invention belongs to the field of magnetic suspension rail traffic, and particularly relates to a magnetic suspension rail beam.

Background

The normally-conducting magnetic-levitation train developed in China at present utilizes attraction force generated by electromagnetic systems arranged on a train suspension frame and a track to enable the train to keep vertically suspended above the track, utilizes electromagnetic force to enable the suspension frame and the track to keep horizontal clearance, and utilizes a linear motor to directly convert electric energy into propelling force to push the train to advance. The magnetic force of the rail separates the contact surface of the train and the rail, and reduces the friction force, so the magnetic suspension train has the advantages of high speed, stable and comfortable operation, no noise, no harmful waste gas emission and the like, and is one of the important directions of rail traffic development.

However, when a normally-conducting magnetic levitation train is operated, a train which is operated at a high speed generates a large aerodynamic force, and particularly, when the train is met in two lines, the large aerodynamic force adversely affects the track.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a magnetic suspension track beam to solve the technical problem that a large aerodynamic force generated during a train operation adversely affects a track.

In order to solve the above technical problem, the technical solution of the embodiment of the present invention is implemented as follows:

the embodiment of the invention provides a magnetic suspension track beam, which comprises:

the magnetic suspension rail comprises more than two main beams, wherein the main beams are arranged on the upper surface of the bottom plate and fixedly connected with the bottom plate, each main beam is used for forming a magnetic suspension rail, and each two adjacent main beams and the bottom plate form a groove-shaped space in a surrounding mode.

Further, the ventilation structure is a through hole formed in the vertical direction.

Further, the number of the through holes is multiple, and the through holes are arranged along the extending direction of the bottom plate from the one end to the other end.

Further, the distance between the adjacent through holes is the same.

Further, the cross-section of girder is the T type, including supporting part and the top flange of setting above the supporting part.

Further, the upper surface of the upper flange forms a track surface of the magnetic suspension track.

Further, the lower surface of the upper flange is used for mounting a first functional component so as to generate induction magnetic force.

Furthermore, the side surface of the upper flange is a guide surface for mounting a second functional component to generate induction magnetic force.

Further, at least one of a cable channel, a maintenance channel and a rescue channel can be arranged in the groove-shaped space.

Furthermore, a rib plate is arranged on the bottom plate.

The magnetic suspension track beam provided by the embodiment of the invention comprises a bottom plate and more than two main beams arranged on the upper surface of the bottom plate, wherein the bottom plate is provided with a ventilation structure. Through the arrangement, the ventilation structure is arranged on the bottom plate, high-speed airflow generated above the bottom plate when a train runs can be guided out through the ventilation structure, and aerodynamic force generated by the high-speed airflow on the bottom plate can be reduced, so that adverse effects of the aerodynamic force on a track are reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a magnetically suspended track beam provided by an embodiment of the present invention;

FIG. 2 is a top view of a magnetically suspended track beam provided by an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a two-wire magnetic suspension track beam according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a three-wire magnetic suspension track beam provided by an embodiment of the present invention;

FIG. 5 is a top view of another magnetically suspended track beam according to an embodiment of the present invention;

FIG. 6 is a top view of another magnetically suspended track beam according to an embodiment of the present invention;

FIG. 7 is a top view of another magnetically suspended track beam according to an embodiment of the present invention

FIG. 8 is a top view of another magnetically suspended track beam provided by an embodiment of the present invention;

FIG. 9 is a top view of another magnetically suspended track beam provided by an embodiment of the present invention;

fig. 10 is a top view of another magnetically suspended rail beam provided by an embodiment of the present invention;

fig. 11 is a top view of another magnetically suspended track beam provided by an embodiment of the present invention;

FIG. 12 is a cross-sectional schematic view of a main beam provided by an embodiment of the present invention;

FIG. 13 is a cross-sectional view of another magnetically suspended track beam provided by an embodiment of the present invention;

fig. 14 is a schematic cross-sectional view of a TR-type normally conductive magnetic suspension track beam provided by an embodiment of the present invention;

fig. 15 is a schematic cross-sectional view of an HSST type normally conductive magnetically suspended track beam provided by an embodiment of the present invention;

fig. 16 is a schematic cross-sectional view of a magnetically suspended track beam with rescue and maintenance access and cable support provided by an embodiment of the present invention;

fig. 17 is a schematic cross-sectional view of an embodiment of a magnetically suspended track beam having a rib of the present invention.

Description of reference numerals:

1. a base plate; 2. a main beam; 21. a first main beam; 22. a second main beam; 23. a third main beam; 3. a venting structure; 31. a through hole; 311. a cylindrical through hole of circular cross section; 312. a columnar through hole with a long strip-shaped cross section; 4. a slot-shaped space; 41. a first slot-shaped space; 42. a second slot-shaped space; 5. a support portion; 6. an upper flange; 61. the upper surface of the upper flange 6; 62. the lower surface of the upper flange 6; 7. a first functional component; 8. a magnetic levitation train; 81. a functional component of the bottom surface of the maglev train 8; 82. a functional component on the side surface of the maglev train 8; 9. an F-shaped track; 91. a linear motor reaction plate; 92. a suspension gap detection surface; 93. a suspension surface; 10. a guide surface; 101. a second functional component; 11. a column; 12. a platform; 13. a cable holder; 14. a rib plate; l1, first pitch; l2, second pitch; l3, third pitch; A. one end of the bottom plate 1 along the bridge direction; B. the other end of the bottom plate 1 along the bridge direction; C. one end of the bottom plate 1 in the transverse bridge direction; D. the other end of the bottom plate 1 is transversely bridged.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The individual features described in the embodiments can be combined in any suitable manner without departing from the scope, for example different embodiments and aspects can be formed by combining different features. In order to avoid unnecessary repetition, various possible combinations of the specific features of the invention will not be described further.

In the following description, references to the terms "first", "second", and the like are simply to distinguish between different objects and do not denote the same or a relationship between the two. It should be understood that the references to "above" and "below" are to be interpreted as referring to the orientation during normal use. The cross section of the magnetic suspension track beam is a section perpendicular to the bridge following direction of the magnetic suspension track beam, and the bridge following direction of the magnetic suspension track beam is the direction with the largest size of the track. The bridge direction of the bottom plate is the same as the bridge direction of the magnetic suspension track beam, and the transverse bridge direction of the bottom plate is the direction of the main beam connected with the upper bottom plate on the cross section of the magnetic suspension track beam.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The embodiment of the invention provides a magnetic suspension track beam which can be used in the technical field of magnetic suspension track traffic. The operation principle of the magnetic suspension train is explained by taking a two-wire magnetic suspension train track beam as an example, the two-wire magnetic suspension train track beam, namely one track beam, forms two tracks, and the suspension and the braking of the train are realized by installing an induction functional component on the track beam and generating attraction between the induction functional component and a functional component installed on the train. The working principle of magnetic suspension of the multi-line magnetic suspension train is the same.

As shown in fig. 1, the magnetic levitation track beam includes a base plate 1 and a main beam 2. In some embodiments, the spacing between adjacent main beams can be varied by varying the width of the floor 1 across the bridge between adjacent main beams (the length of the CD shown in fig. 1). In some embodiments, as shown in fig. 2, the width of the bottom plate 1 in the transverse direction between the adjacent main beams can be changed to meet the requirements of different geographic conditions of the maglev train during the running process.

As shown in fig. 1, the bottom plate 1 is a mounting base of the main beam 2, and the main beam 2 is disposed above the bottom plate 1 and is fixedly connected to the bottom plate 1. The main beams 2 comprise a plurality of main beams, each main beam 2 is used for forming a magnetic suspension track, and a groove-shaped space 4 is formed by the two adjacent main beams 2 and the bottom plate 1 in a surrounding mode.

In some embodiments, as shown in fig. 3, the main beams 2 include two main beams, namely a first main beam 21 and a second main beam 22, the first main beam 21 is disposed at one end C of the bottom plate 1, the second main beam 22 is disposed at the other end D of the bottom plate 1, and the first main beam 21, the second main beam 22 and the bottom plate 1 enclose a groove-shaped space 4. This magnetic suspension track beam structure, adopt the form of cell type cross section, link together first girder 21 and second girder 22 through bottom plate 1, in the aspect of structural rigidity, the cell type structure can improve the vertical bending rigidity and the horizontal bending rigidity of track roof beam, with the two-way dislocation that reduces the track roof beam, and use the cell type cross section under the operating mode of sunshine, the upper surface of bottom plate 1 and girder 2 receives sunshine perpendicular incidence simultaneously, the temperature deformation of bottom plate 1 and girder 2 is little, the horizontal and vertical difference in temperature deformation condition of magnetic suspension track roof beam promptly can effectually be alleviated.

In some embodiments, as shown in fig. 4, the main beams 2 include three main beams, which are a first main beam 21, a second main beam 22 and a third main beam 23, the first main beam 21 is disposed at one end C of the bottom plate 1, the second main beam 22 is disposed at the other end D opposite to the bottom plate 1, the third main beam 23 is disposed on the bottom plate 1, and in the middle position between the first main beam 21 and the second main beam 22, the first main beam 21, the third main beam 23 and the bottom plate 1 enclose a first groove-shaped space 41, and the second main beam 22, the third main beam 23 and the bottom plate 1 enclose a second groove-shaped space 42, where the three main beams 2 form a structure of two groove-shaped spaces 4, the groove-shaped structure not only can improve the vertical bending rigidity and the lateral bending rigidity of the track beam, can reduce the two-way displacement of the track beam, but also can provide more maglev trains to run simultaneously.

In some embodiments, the main beam 2 and the bottom plate 1 can be fixed by bolts so as to prevent loosening and avoid potential safety hazards. In some embodiments, the girders 2 may be concrete slabs, the base plate 1 and the girders 2 may be integrally formed by casting, or may be cast on the base plate 1 after the base plate 1 is laid, so as to form a magnetic levitation track, which provides a support and a running track for a train.

As shown in fig. 1, the bottom plate 1 is provided with a ventilation structure 3. The ventilation structure 3 may be a through hole formed on the bottom plate 1. During train operation, especially during two-way train intersection, due to high-speed operation of the train, airflow in the groove-shaped space 4 between the adjacent main beams is driven to move at high speed, and accordingly aerodynamic force is generated on the bottom plate 1 at the lower part of the groove-shaped space 4. Through the ventilation structure 3 starting on the bottom plate 1, high-speed airflow flows out of the groove-shaped space 4 from the ventilation structure 3, aerodynamic force acting on the surface of the bottom plate 1 and aerodynamic force of the main beam 2 are reduced, and therefore the influence of the aerodynamic force on the magnetic suspension track is reduced.

Further, as shown in fig. 3, the ventilation structure 3 on the bottom plate 1 is a through hole 31 opened along the vertical direction. Namely: the ventilation structure is a through hole 31 penetrating the bottom plate 1 from the top to the bottom. Because the through hole 31 is seted up along vertical direction, the outside of cell type space 4 is flowed out along vertical direction to the air current in the cell type space 4 then, and the air current does not produce horizontal effort when flowing through bottom plate 1 to can not produce the transverse impact by the bottom plate, high-speed air current flows out to cell type space 4 from through hole 31, and the aerodynamic force that is used in bottom plate 1 surface and the aerodynamic force of girder 2 reduce, thereby has reduced the influence that the aerodynamic force caused the magnetic levitation track.

In some embodiments, the through-holes 31 in the base plate 1 may have various shapes. In some embodiments, as shown in fig. 5, the through hole 31 may be a cylindrical through hole 311 having a circular cross section, and the cylindrical through hole 311 may be formed by stamping and milling, which has the advantages of simple structure and convenient forming, and the structure can ensure that the entire bottom plate 1 has better rigidity on the premise of effectively reducing the influence of aerodynamic force on the magnetic levitation track. In some embodiments, as shown in fig. 6 and 7, the through hole 31 may be a cylindrical through hole 312 with an elongated cross section, the elongated through hole 312 may be disposed along the bridge direction of the bottom plate 1, and may also be disposed along the transverse bridge direction of the bottom plate 1, and the elongated through hole 312 may be formed by stamping and milling, which has the advantages of simple structure and convenient forming.

Further, the through holes 31 of the base plate 1 are plural in number and arranged along the extending direction of the base plate 1 from one end to the opposite end. When the magnetic suspension train 8 runs at a higher speed, the generated aerodynamic force is larger, and the influence of the aerodynamic force on the magnetic suspension track is larger; conversely, the slower the magnetic levitation vehicle 8 is moving, the less aerodynamic force is generated and the less influence the aerodynamic force has on the magnetic levitation track. According to the running speed of the magnetic suspension train 8, the generated aerodynamic force is predicted, and then the total area of the through holes formed in the bottom plate 1 can be correspondingly adjusted. In some embodiments, as shown in fig. 5, according to the length of the bottom plate 1, a plurality of cylindrical through holes 311 are arranged along the extending direction of the bottom plate 1 from one end a to the other end B along the bridge direction, and this structure can increase the total area of the through holes formed on the bottom plate 1, can effectively reduce the adverse effect of aerodynamic force on the magnetic levitation track, and has the advantages of simple structure and convenient forming. In some embodiments, a plurality of through holes may be simultaneously disposed along the extending direction of the bottom plate 1 along the bridge direction and the transverse bridge direction, as shown in fig. 8, two rows of cylindrical through holes 311 are disposed along the transverse bridge direction of the bottom plate 1 from one end C to the other end D according to the width of the bottom plate 1, the two rows of cylindrical through holes 311 can greatly increase the ventilation area, enable more air flows to flow out of the slot-shaped space 4 through the cylindrical through holes 311, can significantly reduce the adverse effect of aerodynamic force on the magnetic levitation track, and the remaining un-opened portions of the bottom plate 1 are equivalent to the cross beams, which can enable the bottom plate structure to maintain sufficient transverse rigidity and maintain balanced stress.

Further, as shown in fig. 5, the distances between the adjacent through holes 311 in the forward direction on the bottom plate 1 are the same. Specifically, along the bridge direction of the bottom plate 1, a plurality of through holes 311 are arranged from one end a to the other end B, the center distance between adjacent through holes 311 is the first distance L1, and L1 is relatively small, so that the total area of the through holes formed in the bottom plate 1 is large, the magnetic levitation railway is suitable for a high-speed road section with a high speed of the magnetic levitation train 8, more air flows can flow out of the groove-shaped space 4 through the through holes 311, and the influence of aerodynamic force on the magnetic levitation railway is small. In some embodiments, as shown in fig. 9, a plurality of through holes 311 are arranged along the bottom plate 1 from one end a to the other end B along the bridge direction, the center distance between adjacent through holes 311 is a second distance L2, and L2 is relatively large, so that the total area of the through holes formed on the bottom plate 1 is small, which is suitable for a low-speed road section with a slow speed of the maglev train 8, and the aerodynamic force generated by the maglev train 8 is small, and the total area of the through holes 311 with the second distance L2 on the bottom plate 1 is enough to overcome the influence of the aerodynamic force on the maglev track. Further, in some embodiments, as shown in fig. 10, in the intersection region of the high and low speed road sections of the magnetic suspension train 8, the distances between the adjacent through holes in the direction of the bridge of the bottom plate 1 are different, and the distances are the first distance L1 and the second distance L2, respectively.

In some embodiments, as shown in fig. 11, the distance between adjacent cylindrical through holes 311 along the transverse bridge direction on the bottom plate 1 is the same. That is, a plurality of cylindrical through holes 311 are formed in the cross section of the same magnetic suspension track beam, and the center distance between adjacent cylindrical through holes 311 in the transverse bridge direction is the third distance L3, and the distances are the same. The remaining unopened portions of the floor 1 correspond to the cross-members, which enables sufficient lateral rigidity to be maintained and uniform forces to be maintained on the floor structure.

In some embodiments, as shown in fig. 2, the number of the main beams 2 is two, that is, the two-line beams, in which case the cross section of the main beams 2 is T-shaped, and includes a support portion 5 and an upper flange 6 disposed above the support portion 5. It should be noted that the cross section of the main beam 2 is T-shaped, and the surface of the upper flange 6 and the side surface of the support portion 5 are not required to be perpendicular to each other, and may be deformed to some extent as long as the cross section is substantially T-shaped; it is only necessary that the support portion 5 extends in a substantially vertical direction and the upper flange 6 extends in a substantially horizontal direction and protrudes from both sides of the support portion 5.

In some embodiments, as shown in fig. 12, in the cross section, the support portion 5 and the upper flange 6 are both in a straight structure, and the extending direction of the support portion 5 and the extending direction of the upper flange 6 are arranged perpendicularly, so that the support portion 5 can receive uniform force from the train, and the bidirectional displacement of the track beam is reduced. In some embodiments, as shown in fig. 13, in the cross section, the supporting portion 5 is an arc-shaped arm, the upper flange 6 is a straight-line structure, the extending direction of the upper flange 6 is parallel to the bottom plate 1, and the supporting portion 5 and the bottom plate 1 are arranged at a certain angle, which can increase the volume of the groove-shaped space 4, provide a sufficient accommodating space for other devices of the maglev train system, and at the same time, can increase the effective area of the bottom plate 1 that is irradiated by sunlight directly, so that the temperature deformation of the upper flange 6 and the bottom plate 1 is reduced, that is, the temperature difference deformation of the magnetic suspension track beam in the horizontal direction and the vertical direction can be effectively alleviated. In some embodiments, the support portion 5 and the upper flange 6 may be connected and fastened by welding. In some embodiments, the support portion 5 and the upper flange 6 may be connected and fastened by means of a bolt fastening by means of a pre-threaded connection.

In some embodiments, as shown in figure 14, the support portion 5 provides support for the train, and the upper surface 61 of the upper flange 6 forms the track surface of the magnetic levitation track. In some embodiments, the lower surface 62 of the upper flange 6 is used to mount the first functional component 7 to generate an induced magnetic force. Optionally, the magnetic suspension track beam is a track beam for a TR-type normally-conducting maglev train to run, the cross section of the upper flange 6 is a linear track, the first functional components 7 are arranged on two sides of the lower surface 62 of the upper flange 6 and are arranged on the functional components 81 at the bottom of the maglev train 8 in a matching manner, when the maglev train 8 runs, the first functional components 7 and the functional components 81 at the bottom of the maglev train 8 are electrified and excited to generate electromagnetic induction, so that the first functional components 7 and the functional components 81 attract each other to realize suspension of the maglev train 8 on the track, and a stable suspension gap between the maglev train 8 and the track is ensured by controlling exciting currents of the first functional components 7 and the functional components 81. In some embodiments, as shown in fig. 15, the magnetic levitation track beam is a track beam for HSST type magnetic levitation train operation, the upper flange 6 has an F-shaped cross section at both sides, and the F-shaped track 9 is fixed at both sides of the upper surface 61 of the upper flange 6. On the section, a linear motor reaction plate 91 is arranged on the upper surface of an F-shaped rail 9, a groove surface is a suspension gap detection surface 92, the lower surfaces of two protruding arms are suspension surfaces 93, the F-shaped rail 9 is matched with a vehicle bottom functional component 81 of a magnetic suspension train 8, when the magnetic suspension train 8 runs, the F-shaped rail 9 and the functional component 81 are attracted to each other by utilizing electromagnetic induction, the suspension of the train is realized, and the gap between the guide rail and a vehicle body is regulated and controlled by utilizing the gap detection surface 92.

In some embodiments, as shown in fig. 14, the side of the upper flange 6 forms a guide surface 10, on which guide surface 10 a second functional component 101 is arranged, substantially parallel to the functional component 82 on the side of the magnetic levitation vehicle 8. When the magnetic levitation vehicle 8 is in operation, an induced current is generated in the second functional module 101, the magnetic field of the induced current is in the opposite direction to the magnetic field of the functional module 82, and a repulsive force occurs between the second functional module 101 and the functional module 82. When the magnetic suspension train 8 runs at the center of the whole guide rail, the repulsion forces at the two sides are equal in magnitude and opposite in direction, the two repulsion forces are mutually counteracted, and the resultant force is zero. When the maglev train 8 is not at the center of the track, the repulsive force between the two sides is reasonably not zero. When the magnetic levitation vehicle 8 is deflected to the left, when the functional module 82 on the right of the magnetic levitation vehicle 8 approaches the second functional module 101 on the right of the guide surface 10, the functional module 82 on the left of the magnetic levitation vehicle 8 moves away from the second functional module 101 on the right of the guide surface 9, the repulsive force on the right of the magnetic levitation vehicle 8 increases, the repulsive force on the left of the magnetic levitation vehicle 8 decreases, the resultant force of the two forces is directed to the right, the resultant force of the repulsive forces the magnetic levitation vehicle 8 to move to the right, and the more the magnetic levitation vehicle 8 is deflected to the left, the larger. The opposite is true when the train is shifted to the right. Therefore, only when the maglev train 8 is at the midpoint of the entire track, the resultant force of the repulsive forces of the left and right sides of the maglev train 8 is zero, thus ensuring that the train can stably run at the center of the track at any speed.

In some embodiments, as shown in fig. 16, a structure of the upright 11 and the platform 12 is provided in the channel space 4, with the upper side of the platform 12 being a rescue channel and the lower side of the platform 12 being a maintenance channel. The height of the upright 11 is substantially equal to the height of the support 5 of the main beam 2, so that the platform 12 is substantially level with the upper flange 6. The upright post 11 and the platform 12 can be integrally formed by pouring after the bottom plate 1 is laid, and the upright post 11, the platform 12 and the bottom plate 1 can also be connected in a welding or bolt fixing mode. In some embodiments, a large number of cables can be arranged in the groove-shaped space 4, and the cable brackets 13 are arranged on both sides of the upright post 11, so that the cables can be fixed without additionally erecting cable brackets outside the magnetic suspension track beam or arranging the cables in a method of digging a cable well underground. The groove-shaped space 4 is fully utilized, the problems of rescue and maintenance are solved, and the construction cost required by cable arrangement is reduced.

Further, as shown in fig. 17, rib plates 14 are arranged in the groove-shaped space 4 on the bottom plate 1, and the rib plates 14 are used for connecting the bottom plate 1 and the main beam 2 according to the stress condition of the main beam 2 and the total area of the ventilation structure 3 arranged on the bottom plate 1, so that the structural strength and rigidity of the bottom plate 1 and the main beam 2 can be improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A magnetically suspended track beam, comprising:

a base plate;

the two or more main beams are arranged on the upper surface of the bottom plate and fixedly connected with the bottom plate, each main beam is used for forming a magnetic suspension track, and a groove-shaped space is formed by the two adjacent main beams and the bottom plate;

wherein, the bottom plate is provided with a ventilation structure.

2. The magnetically suspended track beam of claim 1, wherein the ventilation structure is a through hole opened in a vertical direction.

3. The magnetically suspended track beam of claim 2, wherein said through holes are plural in number and are disposed along the extension of said base plate from said one end to the opposite end.

4. The magnetically suspended track beam of claim 3, wherein the spacing between adjacent through holes is the same.

5. The magnetically suspended track beam of claim 1, wherein the number of the main beams is two, and the cross section of the main beam is T-shaped and includes a support portion and an upper flange disposed above the support portion.

6. The magnetically suspended track beam of claim 5, wherein the upper surface of the upper flange forms a track surface of the magnetically suspended track.

7. The magnetically suspended track beam of claim 6, wherein the lower surface of the upper flange is configured to receive a first functional component to generate an induced magnetic force.

8. The magnetically suspended track beam of claim 6, wherein the upper flange is provided with a guide surface on its side for mounting the second functional component to generate the induced magnetic force.

9. The magnetically suspended track beam of claim 1, wherein at least one of a cable channel, a maintenance channel and a rescue channel is disposed in the slotted space.

10. The magnetically suspended track beam of claim 1, wherein ribs are provided on the base plate.