Maglev train system

Abstract

The invention discloses a maglev train system, and relates to the technical field of maglev trains, the maglev train system comprises a track beam, the top surface of the track beam is symmetrically provided with second linear traction motor secondary parts; the lower part of the bogie is positioned below the track beam, and the upper part of the bogie is positioned above the track beam; two suspension electromagnets are symmetrically arranged at the lower part of the bogie; the top faces of the two suspension electromagnets are each provided with a first linear traction motor primary. And two second linear traction motor primary stages are symmetrically arranged at the upper part of the bogie. According to the maglev train system, the technical problems that traction force fluctuates due to fluctuation of the suspension gap in the running process of an existing maglev train, and the stability is poor when the maglev train runs are solved. The suspension gap is kept consistent with the primary traction air gap of the first linear traction motor, the sum of traction force borne by the maglev train in the running process is kept unchanged all the time, traction force fluctuation caused by suspension gap fluctuation is eliminated, and the running stability of the maglev train is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of maglev trains, and particularly relates to a maglev train system. Background Art

[0002] Currently, the driving mode of a maglev train system is generally that the primary of a linear traction motor is installed on the bogie crossbeam, the secondary aluminum reaction plate is located above the track beam, the suspension electromagnet provides suspension force for the maglev train, and is located below the track beam. The primary of the linear traction motor acts on the secondary aluminum reaction plate to move, providing traction force for the maglev train and driving the maglev train to move.

[0003] However, in the existing maglev train system, when the maglev train runs with a small suspension gap, there will be a large traction air gap, resulting in large traction energy consumption; when the maglev train runs with a small traction air gap, there will be a large suspension gap, resulting in large suspension energy consumption. This "complementary" coupling relationship affects the traction performance of the maglev train, reduces the traction efficiency of the primary of the linear traction motor, and the traction force fluctuation caused by the fluctuation of the suspension gap leads to poor stability of the maglev train during operation. Therefore, a maglev train system for solving the above problems is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a maglev train system, which solves the technical problem that the traction force fluctuation caused by the fluctuation of the suspension gap during the operation of the existing maglev train leads to poor stability of the maglev train during operation.

[0005] To achieve the above purpose, the present invention provides a maglev train system, including:

[0006] A track beam, on the bottom surface of which two U-shaped steel rails are symmetrically arranged, and a first linear traction motor secondary is respectively arranged on the bottom surface of each U-shaped steel rail, and a second linear traction motor secondary is symmetrically arranged on the top surface of the track beam;

[0007] A bogie, provided at the bottom of the maglev train, the lower part of the bogie is located below the track beam, and the upper part of the bogie is located above the track beam;

[0008] Two suspension electromagnets are symmetrically arranged at the lower part of the bogie, each suspension electromagnet is located directly below a U-shaped steel rail, and after the suspension electromagnet and the U-shaped steel rail are energized, they interact with each other to provide suspension force for the maglev train;

[0009] A first linear traction motor primary is respectively arranged on the top surface of the two suspension electromagnets, and after the first linear traction motor primary and the first linear traction motor secondary are energized, they interact with each other to provide a first traction force for the maglev train;

[0010] Two second linear traction motor primaries are symmetrically arranged on the upper part of the bogie. After the second linear traction motor primaries and the second linear traction motor secondaries are electrified, they interact with each other to provide a second traction force to the maglev train.

[0011] Preferably, the second linear traction motor secondary includes: a first aluminum reaction plate disposed on the bottom surface of the U-shaped steel rail, and the bottom surface of the first aluminum reaction plate is a suspension gap detection surface.

[0012] Preferably, the second linear traction motor secondary includes: a second aluminum reaction plate disposed on the top surface of the track beam.

[0013] Preferably, the track beam includes: an integrally provided support arm and a cushion block, the support arm is located at the upper end of the track beam, and the cushion block is located at the lower end of the track beam.

[0014] Preferably, two support arms are symmetrically arranged on the bottom surface of the bogie, and the lower ends of the two support arms are respectively located below the two ends of the support arm.

[0015] Preferably, the support arm is L-shaped, and the suspension electromagnet is disposed at the lower end of the support arm.

[0016] Preferably, an assembly groove is provided on the top surface of the suspension electromagnet, and the first linear traction motor primary is provided in the assembly groove, and the first linear traction motor primary is located directly below the first linear traction motor secondary.

[0017] Preferably, two cross beams are symmetrically arranged on the upper part of the bogie, and the second linear traction motor primary is provided at the bottom of the cross beam, and the second linear traction motor primary is located directly above the second linear traction motor secondary.

[0018] Preferably, a plurality of mounting holes are arranged in an array on the top surface of the cross beam, and the second linear traction motor primary is fixedly connected by screws passing through the mounting holes.

[0019] Preferably, a plurality of secondary suspension devices are provided on the top surface of the bogie.

[0020] Compared with the above background technology, a maglev train system provided by the present invention has the following beneficial effects:

[0021] (1) In the present invention, the primary of the first linear traction motor and the suspension electromagnet are both located below the track beam, and the primary of the second linear traction motor is located above the track beam. The suspension gap is kept consistent with the traction air gap of the primary of the first linear traction motor. During the operation of the maglev train, when the suspension gap increases, the traction air gap of the primary of the first linear traction motor increases synchronously, and then the first traction force of the primary of the first linear traction motor will decrease. At the same time, due to the increase of the suspension gap, the traction air gap of the primary of the second linear traction motor decreases synchronously, and the second traction force of the primary of the second linear traction motor will increase, so that the sum of the first traction force and the second traction force received by the maglev train always remains unchanged, thereby eliminating the traction force fluctuation caused by the suspension gap fluctuation and improving the operation stability of the maglev train.

[0022] (2) By the simultaneous operation of the primary of the first linear traction motor and the primary of the second linear traction motor, the present invention can greatly improve the traction capacity of the maglev train. Moreover, when the suspension gap is changed, the sum of the first traction force and the second traction force received by the maglev train always remains unchanged. When the maglev train runs on a vertical curve, on the premise of ensuring that the traction force received by the maglev train remains unchanged, by actively reducing the suspension gap to improve the performance of the suspension electromagnet, the suspension electromagnet provides a greater suspension force to overcome the gravity component of the maglev train, thereby achieving the purpose of reducing the suspension energy consumption and improving the traction efficiency of the overall maglev train system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0024] Figure 1 It is a three-dimensional structure diagram of the maglev train system provided by the embodiment of the present invention;

[0025] Figure 2 It is a front view of the maglev train system provided by the embodiment of the present invention;

[0026] Figure 3 It is a side view of the maglev train system provided by the embodiment of the present invention;

[0027] Figure 4 It is a top view of the maglev train system provided by the embodiment of the present invention;

[0028] Figure 5 is Figure 2 an enlarged schematic view of part A in

[0029] Specifically, 1 - track beam; 101 - support arm; 102 - spacer; 2 - first linear traction motor secondary; 3 - second linear traction motor secondary; 4 - bogie; 401 - support bracket; 402 - cross beam; 403 - secondary suspension device; 404 - screw; 5 - levitation electromagnet; 501 - assembly groove; 6 - U - shaped steel rail; 7 - first linear traction motor primary; 8 - second linear traction motor primary. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In order to enable those skilled in the art in this technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0032] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, to achieve the above - mentioned purpose, the present invention provides a maglev train system, including: a track beam 1 and a bogie 4 that cooperates with the track beam 1.

[0033] Two U - shaped steel rails 6 are symmetrically arranged on the bottom surface of the track beam 1. A first linear traction motor secondary 2 is respectively arranged on the bottom surface of each U - shaped steel rail 6. The top surfaces of both ends of the support arm 101 are respectively provided with a second linear traction motor secondary 3. A bogie 4 is arranged at the bottom of the maglev train. The lower part of the bogie 4 is located below the track beam 1, and the upper part of the bogie 4 is located above the track beam 1. Further, two levitation electromagnets 5 are symmetrically arranged at the lower part of the bogie 4. Each levitation electromagnet 5 is located directly below a U - shaped steel rail 6. After the two levitation electromagnets 5 and the two U - shaped steel rails 6 are respectively energized, the levitation electromagnet 5 and the U - shaped steel rail 6 interact with each other, specifically, a repulsive force, to provide a levitation force for the maglev train, so that the bogie 4 is separated from the U - shaped steel rail 6, achieving the purpose of maglev train levitation. Among them, the distance between the first linear traction motor primary 7 and the first linear traction motor secondary 2 is the levitation gap.

[0034] On the top surfaces of two suspension electromagnets 5, there is respectively arranged a primary of a first linear traction motor 7. The two primaries of the first linear traction motor 7 are respectively located below the track beam 1. After the primary of the first linear traction motor 7 and the secondary of the first linear traction motor 2 are electrified, they interact with each other. The distance between the primary of the first linear traction motor 7 and the secondary of the first linear traction motor 2 is also the traction air gap of the primary of the first linear traction motor 7, and the traction air gap of the primary of the first linear traction motor 7 is kept consistent with the suspension gap. Specifically, after the primary of the first linear traction motor 7 is electrified, the primary magnetic field generated by the primary of the first linear traction motor 7 and the secondary magnetic field generated by the secondary of the first linear traction motor 2 interact with each other to provide a first traction force to the primary of the first linear traction motor 7 and the bogie 4, driving the maglev train to move along the length direction of the track beam 1. It should be noted that the thrust or braking force can be achieved by adjusting the current direction.

[0035] On the upper part of the bogie 4, there are symmetrically arranged two primaries of a second linear traction motor 8. The two primaries of the second linear traction motor 8 are respectively located above the track beam 1. The primary of the second linear traction motor 8 is used to drive the secondary of the second linear traction motor 3 to move, so as to provide a second traction force to the maglev train. Specifically, after the primary of the second linear traction motor 8 is electrified, the primary magnetic field generated by the primary of the second linear traction motor 8 and the secondary magnetic field generated by the secondary of the second linear traction motor 3 interact with each other to provide a second traction force to the primary of the second linear traction motor 8 and the bogie 4, further driving the maglev train to move along the length direction of the track beam 1. By the simultaneous operation of the primary of the first linear traction motor 7 and the primary of the second linear traction motor 8, the traction capacity of the maglev train can be greatly improved.

[0036] It should be noted that by adjusting the current magnitudes of the primary of the first linear traction motor 7 and the primary of the second linear traction motor 8, the traveling speed of the maglev train can be adjusted. By synchronously adjusting the current directions of the primary of the first linear traction motor 7 and the primary of the second linear traction motor 8, the switching between the thrust and the braking force can be achieved.

[0037] During the operation of the maglev train, the primary of the first linear traction motor 7 and the suspension electromagnet 5 are both located below the track beam 1, and the primary of the second linear traction motor 8 is located above the track beam 1. The suspension gap is kept consistent with the traction air gap of the primary of the first linear traction motor 7. When the suspension gap increases, the traction air gap of the primary of the first linear traction motor 7 increases synchronously, then the first traction force of the primary of the first linear traction motor 7 will decrease. At the same time, due to the increase of the suspension gap, the traction air gap of the primary of the second linear traction motor 8 decreases synchronously, and the second traction force of the primary of the second linear traction motor 8 will increase. The sum of the first traction force and the second traction force received by the maglev train always remains unchanged, thus eliminating the traction force fluctuation caused by the suspension gap fluctuation and improving the operation stability of the maglev train.

[0038] Further, it should be noted that since the sum of the first traction force and the second traction force received by the maglev train remains constant when changing the suspension gap, when the maglev train runs on a vertical curve, while ensuring that the traction force received by the maglev train remains unchanged, the suspension gap is actively reduced to improve the performance of the suspension electromagnet 5, so that the suspension electromagnet 5 provides a greater suspension force to overcome the gravity component of the maglev train, thereby achieving the purpose of reducing suspension energy consumption and improving the traction efficiency of the overall maglev train system.

[0039] As Figure 5 shown, in an embodiment of the present invention, the first linear traction motor secondary 2 includes: a first aluminum reaction plate, the first aluminum reaction plate is arranged on the bottom surface of the U-shaped steel rail 6. In addition, the first linear traction motor primary 7 includes: a first iron core and a first winding, and the arrangement positions of the first iron core and the first winding do not affect the performance of the suspension electromagnet 5. After the first linear traction motor primary 7 and the first linear traction motor secondary 2 are energized, they interact with each other to provide a first traction force to the second linear traction motor primary 8 and the bogie 4. It should be noted that the bottom surface of the first aluminum reaction plate serves as the suspension gap detection surface, and certain machining accuracy needs to be ensured to accurately control the suspension gap, thereby ensuring the stable operation of the maglev train.

[0040] In an embodiment of the present invention, the second linear traction motor secondary 3 includes: a second aluminum reaction plate, the second aluminum reaction plate is arranged on the top surface of the track beam 1. In addition, the second linear traction motor primary 8 includes: a second iron core (not shown in the figure) and a second winding (not shown in the figure), and the arrangement positions of the second iron core and the second winding do not affect the performance of the suspension electromagnet 5. After the second linear traction motor primary 8 and the second linear traction motor secondary 3 are energized, they interact with each other to provide a second traction force to the second linear traction motor primary 8 and the bogie 4.

[0041] The track beam 1 includes: an integrally provided support arm 101 and a cushion block 102. The support arm 101 is located at the upper end of the track beam 1. Among them, two first linear traction motor secondaries 2 are respectively arranged on the bottom surfaces of both ends of the support arm 101. The cushion block 102 is located at the lower end of the track beam 1. By integrally forming the cushion block 102 with the support arm 101, the crack resistance performance of the overall track beam 1 against vibration, impact and temperature changes is improved, and the service life of the track beam 1 is extended.

[0042] It should be noted that two support arms 401 are symmetrically arranged on the bottom surface of the bogie 4. The two support arms 401 and the bottom surface of the bogie 4 form a C shape together. The C-shaped opening faces the support arm 101, so that the support arms 401 are in a surrounding state relative to the two end parts of the support arm 101. The lower ends of the two support arms 401 are respectively located below the two end parts of the support arm 101. Specifically, the support arm 401 is L-shaped, and the levitation electromagnet 5 is arranged on the side surface of the lower end part of the support arm 401, and at the same time, it is ensured that each levitation electromagnet 5 is respectively located directly below a U-shaped steel rail 6.

[0043] In an embodiment of the present invention, an assembly groove 501 is arranged on the top surface of the levitation electromagnet 5. The assembly groove 501 extends along the length direction of the track beam 1. A first linear traction motor primary 7 is arranged in the assembly groove 501. The first linear traction motor primary 7 is located directly below the first linear traction motor secondary 2 to ensure the stable cooperation between the first linear traction motor primary 7 and the first linear traction motor secondary 2, so as to stably provide the first traction force for the maglev train.

[0044] Correspondingly, two cross beams 402 are symmetrically arranged on the upper part of the bogie 4. A second linear traction motor primary 8 is arranged at the bottom of the cross beam 402. The second linear traction motor primary 8 is located directly above the second linear traction motor secondary 3 to ensure the stable cooperation between the second linear traction motor primary 8 and the second linear traction motor secondary 3, so as to stably provide the second traction force for the maglev train.

[0045] In an embodiment of the present invention, a plurality of mounting holes are arranged in an array on the top surface of the cross beam 402. The screw 404 passes through the mounting hole and is fixedly connected to the second linear traction motor primary 8. The second linear traction motor primary 8 is detachably arranged, which is convenient for later maintenance and replacement.

[0046] In addition, a plurality of secondary suspension devices 403 are arranged on the top surface of the bogie 4. The secondary suspension devices 403 are relatively mature existing technologies. They can effectively absorb the impact force from the steel rail through components such as springs and hydraulic shock absorbers, and can reduce the vibration transmission during the operation of the maglev train, thereby improving the riding comfort.

[0047] In an alternative embodiment of the present invention, to ensure the safety of the maglev train during operation, a number of suspension gap sensors can be embedded in the bottom surface of the first aluminum reaction plate. The number of suspension gap sensors is evenly arranged on the bottom surface of the first aluminum reaction plate, and all the suspension gap sensors embedded in the bottom surface of the first aluminum reaction plate have corresponding coordinate positions. The distance between the bottom surface of the first aluminum reaction plate and the primary of the first linear traction motor 7 is detected in real time by the suspension gap sensors to accurately control the suspension gap of the maglev train. During the running of the maglev train, when the suspension gap sensor detects that the difference between the suspension gap and the set suspension gap is greater than the set threshold, an alarm signal will be output, and according to the coordinate position of the corresponding suspension gap sensor, it will assist the staff to go to the specific section of the corresponding track beam 1 to check whether the track beam 1 has shifted or other situations, so as to ensure the stable operation of the maglev train. In addition, the control strategy can be adjusted in time according to the alarm signal output by the suspension gap sensor to avoid contact between the bogie 4 and the track beam 1, effectively avoiding risks such as train deviation and loss of control.

[0048] To ensure the reliability of the suspension gap sensors during operation, there is a certain mutual monitoring function among all the suspension gap sensors. Specifically, when the detection value obtained by one of the suspension gap sensors is too large or too small compared with the detection values obtained by several other suspension gap sensors, the detection value obtained by the corresponding suspension gap sensor will be automatically filtered, and at the same time, the coordinate position of the corresponding suspension gap sensor will be alarmed, and the staff will carry out maintenance or replacement to ensure that the suspension gap sensors can accurately detect the suspension gap.

[0049] For example, if the detection value A obtained by one of the suspension gap sensors is greater than or less than the preset ratio of the average value of the detection values obtained by other suspension gap sensors, the preset ratio can be 5%-20%. At this time, it indicates that the detection value A is an abnormal value, and the detection value A will be automatically filtered, and at the same time, the coordinate position of the corresponding suspension gap sensor will be alarmed; if the detection values (B1, B2... Bn) of n consecutive suspension gap sensors are greater than or less than the preset ratio of the average value of the detection values obtained by other suspension gap sensors, it can be proved that the track beam 1 where the n suspension gap sensors are located must be abnormal. At this time, an alarm should be issued immediately. The number n of consecutive suspension gap sensors is the preset number, such as 3 or more.

[0050] The working principle of the present invention is as follows: The primary of the first linear traction motor 7 and the suspension electromagnet 5 are both located below the track beam 1, and the primary of the second linear traction motor 8 is located above the track beam 1. When the maglev train is running, the suspension gap is kept consistent with the traction air gap of the primary of the first linear traction motor 7. When the suspension gap increases, the traction air gap of the primary of the first linear traction motor 7 increases synchronously, and then the first traction force of the primary of the first linear traction motor 7 will decrease. At the same time, due to the increase of the suspension gap, the traction air gap of the primary of the second linear traction motor 8 decreases synchronously, and the second traction force of the primary of the second linear traction motor 8 will increase, ensuring that the sum of the first traction force and the second traction force received by the maglev train always remains unchanged.

[0051] In summary, by arranging the primary of the first linear traction motor 7 and the suspension electromagnet 5 below the track beam 1, the suspension gap is kept consistent with the traction air gap of the primary of the first linear traction motor 7, and at the same time, the primary of the second linear traction motor 8 is arranged above the track beam 1, so that the sum of the first traction force and the second traction force received by the maglev train during operation always remains unchanged, thereby eliminating the traction force fluctuation caused by the suspension gap fluctuation and effectively improving the running stability of the maglev train.

[0052] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0053] Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A maglev train system, characterized in that: include: A track beam (1), wherein two U-shaped steel rails (6) are symmetrically arranged on the bottom surface of the track beam (1), a first linear traction motor secondary (2) is arranged on the bottom surface of each of the U-shaped steel rails (6), and a second linear traction motor secondary (3) is symmetrically arranged on the top surface of the track beam (1); A bogie (4) is arranged at the bottom of the maglev train, wherein the lower part of the bogie (4) is located below the track beam (1), and the upper part of the bogie (4) is located above the track beam (1); Two suspension electromagnets (5) are symmetrically arranged at the bottom of the bogie (4), each of the suspension electromagnets (5) being located directly below one of the U-shaped steel rails (6), and the suspension electromagnets (5) interact with the U-shaped steel rails (6) after being energized to provide suspension force to the maglev train; A first linear traction motor primary (7) is respectively disposed on the top surface of the two suspension electromagnets (5); the first linear traction motor primary (7) interacts with the first linear traction motor secondary (2) after being energized to provide a first traction force to the maglev train; Two second linear traction motor primaries (8) are symmetrically arranged on the upper part of the bogie (4); after the second linear traction motor primaries (8) and the second linear traction motor secondary (3) are energized, they interact with each other to provide a second traction force to the maglev train.

2. A maglev train system according to claim 1, characterized in that: The first linear traction motor secondary (2) comprises: a first aluminum reaction plate, which is arranged on the bottom surface of the U-shaped steel rail (6), and the bottom surface of the first aluminum reaction plate is a suspension gap detection surface.

3. A maglev train system according to claim 2, characterized in that: The second linear traction motor secondary (3) comprises: a second aluminum reaction plate, which is arranged on the top surface of the track beam (1).

4. A maglev train system according to claim 1, characterized in that: The track beam (1) comprises: an integrally arranged support arm (101) and a cushion block (102); the support arm (101) is located at the upper end of the track beam (1), and the cushion block (102) is located at the lower end of the track beam (1).

5. A maglev train system according to claim 4, characterized in that: Two supporting arms (401) are symmetrically arranged on the bottom surface of the bogie (4), and the lower ends of the two supporting arms (401) are respectively located below the two end portions of the support arm (101).

6. A maglev train system according to claim 5, characterized in that: The support arm (401) is L-shaped, and the suspension electromagnet (5) is arranged at the lower end of the support arm (401).

7. A maglev train system according to claim 1, characterized in that: The top surface of the suspension electromagnet (5) is provided with an assembly groove (501), and the first linear traction motor primary (7) is arranged in the assembly groove (501), and the first linear traction motor primary (7) is located directly below the first linear traction motor secondary (2).

8. A maglev train system according to any one of claims 1 to 7, characterized in that: Two crossbeams (402) are symmetrically arranged on the upper part of the bogie (4), and a second linear traction motor primary (8) is arranged at the bottom of the crossbeam (402), and the second linear traction motor primary (8) is located directly above the second linear traction motor secondary (3).

9. A maglev train system according to claim 8, characterized in that: A plurality of mounting holes are arranged in an array on the top surface of the crossbeam (402), and screws (404) pass through the mounting holes to fix the second linear traction motor primary (8).

10. A maglev train system according to any one of claims 1 to 7, characterized in that: A plurality of secondary suspension devices (403) are arranged on the top surface of the bogie (4).

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