Electromagnetic supporting system for medium-low-speed magnetic levitation vehicle and magnetic levitation vehicle

Abstract

The electromagnetic supporting system comprises an M-shaped rail, a suspension electromagnet and a traction motor stator, the M-shaped rail comprises a body and a traction motor secondary induction plate fixed to the middle of the lower surface of the body, and the upper surface of the body is fixedly connected with the lower surface of a T-shaped rail beam. The suspension electromagnet is located below the M-shaped rail and installed on the lower portion of a suspension frame supporting arm of the vehicle body, the suspension electromagnet comprises a U-shaped iron core and an electromagnet winding wound around the middle of the U-shaped iron core, the two ends of the U-shaped iron core upwards point to a body of the M-shaped rail, and a traction motor stator is fixed to the upper portion of the electromagnet winding and corresponds to a traction motor secondary induction plate in position. According to the invention, the suspension energy consumption of the medium-low-speed magnetic suspension vehicle in a vehicle rail-holding form is reduced, and the service life of the suspension electromagnet is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and particularly relates to an electromagnetic support system and a maglev vehicle for medium and low speed maglev vehicles. Background Art

[0002] A maglev train is a rail transit vehicle without wheels and gear transmission mechanisms. During operation, the train always maintains a certain gap from the track. The maglev vehicle is equipped with suspension electromagnets located below the track. The track material is a magnetic conductive material. By passing current through the suspension electromagnets for excitation, a closed main magnetic flux is generated. The magnetic field in the air gap between the suspension electromagnets and the track causes a suction force between the suspension electromagnets and the track, thereby suspending the vehicle.

[0003] The current disadvantages of medium and low speed maglev vehicles in the form of vehicle hugging the track are high suspension energy consumption, which is not conducive to energy conservation. Moreover, due to the high energy consumption operation of the suspension electromagnets, high temperatures are easily generated during their operation, affecting the service life. Summary of the Invention

[0004] In view of this, the main purpose of the present invention is to provide an electromagnetic support system for medium and low speed maglev vehicles, so as to reduce suspension energy consumption and extend the service life of the suspension electromagnets.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An electromagnetic support system for medium and low speed maglev vehicles, comprising:

[0007] An M-shaped rail, the M-shaped rail includes a body and a traction motor secondary induction plate fixed to the middle of the lower surface of the body, and the upper surface of the body is fixedly connected to the lower surface of the T-shaped track beam;

[0008] Suspension electromagnets, located below the M-shaped rail, installed at the lower part of the suspension frame arm of the vehicle body. The suspension electromagnets include a U-shaped iron core and an electromagnet winding wound around the middle of the U-shaped iron core. The two ends of the U-shaped iron core point upward towards the body of the M-shaped rail;

[0009] A traction motor stator, fixed above the electromagnet winding and corresponding to the position of the traction motor secondary induction plate.

[0010] Optionally, in the above electromagnetic support system, it includes:

[0011] A water-cooling plate, horizontally arranged between the traction motor stator and the electromagnet winding, and heat-transfer connected to the traction motor stator and the electromagnet winding respectively.

[0012] Optionally, in the above electromagnetic support system, the size of the water-cooled plate along the length direction of the secondary induction plate of the traction motor is not less than the side-by-side size of three of the suspension electromagnets, and at least three of the suspension electromagnets are correspondingly arranged below the water-cooled plate.

[0013] Optionally, in the above electromagnetic support system, each of the suspension electromagnets is provided with three of the electromagnet windings.

[0014] Optionally, in the above electromagnetic support system, it includes an electromagnet back box for carrying the suspension electromagnet, and the electromagnet back box is connected to the lower part of the suspension bracket arm through a primary elastic device.

[0015] Optionally, in the above electromagnetic support system, it includes a suspension sensor arranged on the electromagnet back box, and the suspension sensor is used to collect target information and feedback it to the suspension controller, and the target information at least includes the gap between both ends of the suspension electromagnet and the M-shaped rail.

[0016] Optionally, in the above electromagnetic support system, the electromagnet back box is made of aluminum profiles.

[0017] Optionally, in the above electromagnetic support system, the gaps between both ends of the U-shaped iron core and the body of the M-shaped rail are equal, and are smaller than the gap between the secondary induction plate of the traction motor and the stator of the traction motor.

[0018] A maglev vehicle includes an electromagnetic support system for a medium- and low-speed maglev vehicle as disclosed in any one of the above.

[0019] According to the above technical solution, in the electromagnetic support system for a medium- and low-speed maglev vehicle provided by the present invention, the suspension electromagnet is located below the M-shaped rail, and the M-shaped rail is fixed to the lower surface of the T-shaped track beam. Moreover, both the traction motor and the suspension electromagnet are arranged on the lower side of the T-shaped track beam. When the stator of the traction motor is energized, the normal force generated is in the same direction as the electromagnetic suction force that plays a suspension role. In this way, part of the load can be shared, thereby improving the load-carrying capacity of the vehicle and reducing the suspension energy consumption of the suspension electromagnet. Since the normal force of the traction motor and the electromagnetic suction force of the suspension electromagnet jointly provide the acting force for suspending the vehicle, when the required suspension acting force of the vehicle is roughly the same, compared with the traditional electromagnetic support system, the present invention can allow a smaller current to be passed through the electromagnet windings of the suspension electromagnet to meet the requirements. In this way, the working temperature of the suspension electromagnet can be relatively lower, thereby reducing the impact on the service life of the electromagnet windings. In summary, the present invention is beneficial to reducing the suspension energy consumption of a medium- and low-speed maglev vehicle in the form of vehicle hugging the rail and extending the service life of the suspension electromagnet. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.

[0021] Figure 1 It is a three-dimensional schematic diagram of the electromagnetic support system for medium and low-speed maglev vehicles provided by the embodiment of the present invention;

[0022] Figure 2 is Figure 1 the front view schematic diagram of the electromagnetic support system shown;

[0023] Figure 3 It is a schematic diagram of the usage state of the electromagnetic support system provided by the embodiment of the present invention.

[0024] The markings in the figure are:

[0025] 101, body; 102, secondary induction plate of traction motor; 200, stator of traction motor; 301, U-shaped iron core; 302, electromagnet winding; 400, water-cooled plate; 500, T-shaped track beam; 600, suspension frame support arm; 700, electromagnet back box; 800, suspension sensor. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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 of 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 belong to the scope of protection of the present invention.

[0027] See Figures 1 to 3, embodiments of the present invention provide an electromagnetic support system for a medium and low speed maglev vehicle. The cooperation form between the maglev vehicle and the track is the "vehicle hugging the track" form, that is, the suspension frame of the maglev vehicle corresponds to the T-shaped track beam 500. The guiding parts on both sides of the suspension frame hug both sides of the upper part of the T-shaped track beam 500. The electromagnetic support system includes an M-shaped rail, a suspension electromagnet, and a traction motor stator 200. Among them, the M-shaped rail includes a body 101 and a traction motor secondary induction plate 102 fixed to the middle of the lower surface of the body 101. The upper surface of the body 101 is fixedly connected to the lower surface of the T-shaped track beam 500; the suspension electromagnet is located below the M-shaped rail and is installed at the lower part of the suspension frame support arm 600 of the vehicle body. The suspension electromagnet includes a U-shaped iron core 301 and an electromagnet winding 302 wound around the middle of the U-shaped iron core 301. The two ends of the U-shaped iron core 301 point upward towards the body 101 of the M-shaped rail; the traction motor stator 200 is fixed above the electromagnet winding 302 and corresponds to the position of the traction motor secondary induction plate 102.

[0028] The M-shaped rail is fixed to the lower surface of the T-shaped track beam 500, that is, the M-shaped rail is located on the other side of the T-shaped track beam 500 opposite to the support rail. The support rail of the T-shaped track beam 500 is the rail surface that provides an upward support force when the vehicle is stationary and contacts the suspension frame. It should be understood that the T-shaped track beam 500 is T-shaped. It should be noted that since the cross-section of the maglev vehicle is symmetric about the center line of the T-shaped track beam 500, so Figure 3 only a part of the cross-section of the maglev vehicle is shown. In this part, the T-shaped track beam 500 is L-shaped. See Figure 2 , the body 101 of the M-shaped rail and the traction motor secondary induction plate 102 are integrally M-shaped, the U-shaped iron core 301 of the suspension electromagnet is U-shaped, and the two ends of the U-shaped iron core 301 are opposite to the folded edges on both sides of the body 101 of the M-shaped rail. When the electromagnet winding 302 is energized, a suction force is generated between the U-shaped iron core 301 and the body 101 of the M-shaped rail, so that the vehicle levitates.

[0029] See Figure 3, in the electromagnetic support system of the present invention, both the traction motor and the levitation electromagnet are arranged on the lower side of the T-shaped track beam 500. The stator 200 of the traction motor is disposed in the middle of the levitation electromagnet, and the secondary induction plate 102 of the traction motor is disposed in the middle of the body 101 of the M-shaped rail. When the stator 200 of the traction motor is energized, it interacts with the secondary induction plate 102 of the traction motor to generate an electromagnetic thrust to drive the vehicle forward. Since the stator 200 of the traction motor and the secondary induction plate 102 of the traction motor are arranged on the same side of the levitation electromagnet below the track, the normal force generated when the stator 200 of the traction motor is energized is in the same direction as the electromagnetic suction force for levitation. In this way, the levitation energy consumption of the levitation electromagnet can be reduced, and the normal force generated when the stator 200 of the traction motor is energized additionally increases the acting force for levitation, helping the levitation electromagnet to further improve the load-bearing capacity of the vehicle. Since the normal force generated by the traction motor and the electromagnetic suction force generated by the levitation electromagnet are in the same direction, the normal force additionally supplements a part of the levitation force, that is, the normal force of the traction motor and the electromagnetic suction force of the levitation electromagnet jointly provide the acting force for levitating the vehicle. Therefore, when the levitation acting force required by the vehicle is approximately the same, compared with the traditional electromagnetic support system, the present invention can allow a smaller current to be passed through the electromagnet winding 302 of the levitation electromagnet to meet the requirements. In this way, the operating temperature of the levitation electromagnet can be relatively lower, thereby reducing the impact on the service life of the electromagnet winding 302. In summary, the present invention is beneficial to reducing the levitation energy consumption of medium and low-speed maglev vehicles in the vehicle hugging rail form and extending the service life of the levitation electromagnet.

[0030] In some embodiments, the electromagnetic support system may include a water-cooling plate 400. The water-cooling plate 400 is horizontally arranged between the stator 200 of the traction motor and the electromagnet winding 302 and is heat-transfer connected to the stator 200 of the traction motor and the electromagnet winding 302 respectively. The water-cooling plate 400 can actively dissipate heat from the stator 200 of the traction motor and the electromagnet winding 302, improving the heat dissipation capacity of the electromagnetic support system. In this way, it is beneficial to avoid overheating of the electromagnetic support system during operation. In some embodiments, the water-cooling plate 400 can be directly attached to the electromagnet winding 302 and the stator 200 of the traction motor, or can be heat-transfer connected to the electromagnet winding 302 and the stator 200 of the traction motor through a heat-conducting layer formed by materials such as heat-conducting glue and heat-conducting paste.

[0031] In some embodiments, the dimension of the water-cooling plate 400 along the length direction of the secondary induction plate 102 of the traction motor is not less than the side-by-side dimension of at least three levitation electromagnets, and at least three levitation electromagnets are correspondingly arranged below the water-cooling plate 400. See Figure 1, the side-by-side direction of the suspension electromagnets is the longitudinal direction of the body 101 of the M-shaped rail, that is, the suspension electromagnets are arranged along the length direction of the train track, or along the front-back direction of the maglev vehicle. The side-by-side dimension refers to the overall length of a row of suspension electromagnets formed by multiple suspension electromagnets, that is, the distance between the opposite sides of the two suspension electromagnets located at the outermost positions of the queue. The length dimension of the water-cooling plate 400 is not less than the side-by-side dimension of three suspension electromagnets, so that the water-cooling plate 400 can dissipate heat from three or more suspension electromagnets at the same time.

[0032] See Figure 1 and Figure 2 , in some embodiments, each suspension electromagnet may be provided with three electromagnet windings 302, that is, three electromagnet windings 302 are arranged side by side in the middle of the same U-shaped iron core 301. It is easy to understand that in order to improve the heat dissipation effect, the width dimension of the water-cooling plate 400 should preferably not be less than the dimension of the three electromagnet windings 302 as a whole in the width direction of the water-cooling plate 400. For example, the water-cooling plate 400 may be arranged such that the side of the water-cooling plate 400 is flush with the outer side of the outermost electromagnet winding 302, as Figure 2 shown.

[0033] In some embodiments, the gaps between the two ends of the U-shaped iron core 301 and the body 101 of the M-shaped rail may be set to be equal and smaller than the gap between the secondary induction plate 102 of the traction motor and the stator 200 of the traction motor. As Figure 2 shown, the body 101 of the M-shaped rail includes a first folded edge and a second folded edge on both sides. The gaps P1 between the two ends of the U-shaped iron core 301 and the first folded edge and the second folded edge are smaller than the gap P2 between the secondary induction plate 102 of the traction motor and the stator 200 of the traction motor. In some embodiments, the lower surface of the first folded edge and the upper surface of the first end of the U-shaped iron core 301 are opposite in position and equal in width, and the lower surface of the second folded edge and the upper surface of the second end of the U-shaped iron core 301 are opposite in position and equal in width. By setting the lower surface of the folded edge of the M-shaped rail to be equal in width to the upper surfaces of the two ends of the U-shaped iron core 301, it is beneficial to more precisely control the gap between the suspension electromagnet and the M-shaped rail when the electromagnet winding 302 is energized.

[0034] In some embodiments, the electromagnetic support system may include an electromagnet back box 700 that carries the suspension electromagnet. The electromagnet back box 700 is connected to the lower part of the suspension frame arm 600 through a primary elastic device (not shown). As Figure 3 shown, the suspension electromagnet is installed on the electromagnet back box 700, and the electromagnet back box 700 is elastically connected to the lower part of the suspension frame arm 600, which can improve the safety of the suspension electromagnet and enable the suspension electromagnet to move relative to the suspension frame arm 600 within a certain range of motion.

[0035] In addition, by providing the electromagnet back box 700, it is convenient to install other components on the electromagnet back box 700. For example, in some embodiments, the electromagnetic support system may include a suspension sensor 800 disposed on the electromagnet back box 700. The suspension sensor 800 is used to collect target information and feedback it to a suspension controller (not shown). The target information at least includes the gap P1 between both ends of the suspension electromagnet and the M-shaped rail. The suspension controller may be disposed on the suspension frame. It is electrically connected to the suspension sensor 800 located on the electromagnet back box 700 through a cable arranged along the suspension frame arm 600. In addition to the gap P1 between both ends of the suspension electromagnet and the M-shaped rail, the target information collected by the suspension sensor 800 may also include information such as the acceleration of the suspension electromagnet. The suspension controller controls the current and voltage output to the electromagnet winding 302 according to the target information fed back by the suspension sensor 800, so that the train is suspended near the rated gap.

[0036] In some embodiments, the electromagnet back box 700 may be made of aluminum profiles, which have the characteristics of light weight and high strength, and are beneficial to reducing the overall weight of the electromagnetic support system. Similarly, the suspension frame arm 600 may be made of cast aluminum material, which is beneficial to reducing the weight.

[0037] The present invention also provides a maglev vehicle, which includes the electromagnetic support system for a medium- and low-speed maglev vehicle disclosed in the above embodiments. Since the electromagnetic support system disclosed in the above embodiments has the above technical effects, the maglev vehicle having this electromagnetic support system also has the above technical effects, which will not be elaborated herein again.

[0038] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic support system for medium and low speed maglev vehicles, characterized in that, Comprising: An M-shaped rail, the M-shaped rail including a body and a traction motor secondary induction plate fixed to the middle of the lower surface of the body, and the upper surface of the body is fixedly connected to the lower surface of the T-shaped track beam; A suspension electromagnet, located below the M-shaped rail, installed at the lower part of the suspension frame bracket of the vehicle body, the suspension electromagnet including a U-shaped iron core and an electromagnet winding wound around the middle of the U-shaped iron core, and the two ends of the U-shaped iron core point upward towards the body of the M-shaped rail; A traction motor stator, fixed above the electromagnet winding and corresponding to the position of the traction motor secondary induction plate.

2. The electromagnetic support system according to claim 1, wherein Comprising: A water-cooled plate, horizontally arranged between the traction motor stator and the electromagnet winding, and heat-transfer connected to the traction motor stator and the electromagnet winding respectively.

3. The electromagnetic support system according to claim 2, characterized in that The size of the water-cooled plate along the length direction of the traction motor secondary induction plate is not less than the side-by-side size of three of the suspension electromagnets, and at least three of the suspension electromagnets are correspondingly arranged below the water-cooled plate.

4. The electromagnetic support system according to claim 3, characterized in that, Each of the suspension electromagnets is provided with three of the electromagnet windings.

5. The electromagnetic support system according to claim 1, characterized in that, Comprising an electromagnet back box for carrying the suspension electromagnet, and the electromagnet back box is connected to the lower part of the suspension frame bracket through a primary elastic device.

6. The electromagnetic support system according to claim 5, characterized in that, Comprising a suspension sensor arranged on the electromagnet back box, the suspension sensor is used for collecting target information and feeding it back to the suspension controller, and the target information at least includes the gap between the two ends of the suspension electromagnet and the M-shaped rail.

7. The electromagnetic support system according to claim 5, wherein The electromagnet back box is made of aluminum profile.

8. The electromagnetic support system according to any one of claims 1 to 7, characterized in that The gaps between the two ends of the U-shaped iron core and the body of the M-shaped rail are equal and smaller than the gap between the traction motor secondary induction plate and the traction motor stator.

9. A maglev vehicle, characterized in that, Comprising the electromagnetic support system for medium and low speed maglev vehicles according to any one of claims 1 to 8.

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