Magnetic levitation vehicle and levitation device thereof

Abstract

The magnetic levitation vehicle comprises an induction plate arranged on the lower surface of a track; the linear motor is arranged under the induction plate; the top of the partition plate is connected with the middle of the lower surface of the linear motor, and the bottom extends downwards; the two groups of electromagnet coils are respectively connected with the lower parts of the left and right sides of the partition plate; the cooling fans are connected with the upper portions of the left side and the right side of the partition plate respectively and located between the linear motor and the electromagnet coil. The two polar plates are fixedly connected with the outer sides of the two groups of electromagnet coils respectively, and the distance between the two polar plates is equal to the width of the track; the heat dissipation holes are formed in the positions, corresponding to the heat dissipation fans, of the polar plates. According to the invention, the suspension gap and the motor gap are changed according to the same rule, the normal force and the suspension force of the asynchronous linear motor are in the same direction relative to the track, the problem of serious heating of the linear motor and the electromagnet caused by difficult heat dissipation is solved, the structure is compact, and the balance between heat dissipation performance and light weight is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, in particular to a maglev vehicle and a suspension device thereof. BACKGROUND

[0002] In the prior art, the linear motor of a medium-low speed maglev vehicle is located above the track, the secondary aluminum induction plate of the linear motor is located on the upper surface of the track, and the suspension electromagnet is located below the track, and the acting surface of the suspension electromagnet is the lower surface of the track magnetic pole surface. Since the normal force of the linear motor is downward when the linear motor is in traction, and the electromagnetic force of the suspension electromagnet is upward, the directions of the normal force and the electromagnetic force are opposite, which causes the energy consumption of the suspension electromagnet to increase to offset the influence of the normal force. In addition, for the linear motor, the smaller the air gap between the linear motor and the secondary aluminum induction plate, the higher the efficiency of the linear motor, and the smaller the suspension gap between the suspension electromagnet and the track magnetic pole surface, the smaller the energy consumption of the suspension electromagnet. Since the linear motor and the suspension electromagnet are at a constant vertical height, when the motor air gap decreases, the suspension gap increases accordingly, and when the suspension gap decreases, the motor air gap increases. The motor air gap and the suspension gap cannot be reduced at the same time.

[0003] In view of the above problems, the Chinese invention patent with the publication number CN116495016A discloses a suspension type maglev transportation system. The suspension electromagnet and the linear asynchronous motor are arranged below the track beam at the same time, which realizes the same change rule of the suspension gap and the motor gap, and makes the normal force of the asynchronous linear motor and the suspension force have the same direction relative to the track.

[0004] Although the above-mentioned patent has a compact structure, it still has the problem of serious heating of the linear motor and the electromagnet due to poor heat dissipation. SUMMARY

[0005] The present application provides a maglev vehicle and a suspension device thereof to solve the problem of serious heating of the linear motor and the electromagnet due to poor heat dissipation of the existing suspension type maglev transportation system.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions.

[0007] On the one hand, a suspension device of a maglev vehicle is provided, which comprises:

[0008] an induction plate arranged on the lower surface of the track;

[0009] a linear motor arranged directly below the induction plate;

[0010] a partition plate, the top of which is connected to the middle part of the lower surface of the linear motor, and the bottom of which extends downward;

[0011] two groups of electromagnet wire packages, which are respectively connected to the lower parts of the left and right sides of the partition plate;

[0012] Cooling fans are connected to the upper parts of the left and right sides of the partition, respectively, and are located between the linear motor and the electromagnet coil;

[0013] Two pole plates are fixedly connected to the outside of two sets of electromagnet coils, and the distance between the two pole plates is equal to the width of the track.

[0014] The heat dissipation holes are located on the electrode plate at positions corresponding to the cooling fan.

[0015] Therefore, by arranging the linear motor and electromagnet coil vertically at intervals and installing a cooling fan between the two main heat-generating components, the suspension gap and the motor gap change in the same way, and the normal force of the asynchronous linear motor and the suspension force are in the same direction relative to the track. This also solves the problem of severe overheating of the linear motor and electromagnet due to heat dissipation difficulties. Furthermore, the structure is compact, thereby reducing the overall volume and weight of the suspension device.

[0016] In some embodiments, multiple cooling fans are provided along the length of the track, and heat dissipation holes are provided on the electrode plate at positions corresponding to the cooling fans.

[0017] In some embodiments, guide devices are provided on the outer sides of the two electrode plates respectively, the bottom of the guide devices being connected to the top of the electrode plates, and the top of the guide devices extending upward; the distance between the two guide devices is greater than the width of the track.

[0018] In some embodiments, a suspension sensor is provided at each end of the partition.

[0019] In some embodiments, a plurality of anti-slip skids are uniformly arranged on the top of the electrode plate; the anti-slip skids include friction blocks protruding toward the upper surface of the electrode plate.

[0020] In some embodiments, a temperature sensor and a controller are also included; the temperature sensor is used to detect the temperature of the coil of the linear motor and / or electromagnet; the controller is configured to control the number of cooling fans to be turned on based on the temperature value detected by the temperature sensor.

[0021] In some embodiments, the cross-section of the track includes a horizontal segment and two vertical segments, the top ends of the two vertical segments being connected to the left and right ends of the horizontal segment, respectively; the thickness of the vertical segments is the same as the thickness of the electrode plate.

[0022] On the other hand, a maglev vehicle is provided, wherein the aforementioned levitation device is installed below the maglev vehicle.

[0023] The present invention has at least the following technical effects or advantages: by arranging the linear motor and the electromagnet coil vertically at intervals, and setting a cooling fan between the two main heat-generating components, the suspension gap and the motor gap change in the same way, and the normal force of the asynchronous linear motor and the suspension force are in the same direction relative to the track. It also solves the problem of severe overheating of the linear motor and electromagnet due to heat dissipation difficulties. Furthermore, the structure is compact, achieving a balance between heat dissipation performance and lightweight. Attached Figure Description

[0024] Figure 1 This is a side view of the levitation device of a magnetic levitation vehicle in one embodiment of the present invention;

[0025] Figure 2 This is a three-dimensional schematic diagram of the levitation device of a magnetic levitation vehicle in one embodiment of the present invention;

[0026] Figure 3 This is a top view of the partition in one embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram showing the connection relationship between the linear motor and the partition in one embodiment of the present invention;

[0028] Figure 5 This is a top view of the levitation device of a magnetic levitation vehicle in one embodiment of the present invention (the linear motor is hidden).

[0029] Figure 6 This is a schematic diagram of the grouping of cooling fans in one embodiment of the present invention. Detailed Implementation

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] Example 1

[0032] See Figure 1 A levitation device for a maglev vehicle, comprising:

[0033] Induction plate 1 is located on the lower surface of track 2;

[0034] Linear motor 3 is located directly below induction plate 1;

[0035] The top of the partition 4 is connected to the middle of the lower surface of the linear motor 3, and the bottom extends downward.

[0036] Two sets of electromagnet coils are connected to the lower parts of the left and right sides of the partition 4, respectively;

[0037] Cooling fan 6 is connected to the upper part of the left and right sides of partition 4 respectively, and is located between linear motor 3 and electromagnet coil 5;

[0038] Two pole plates 7 are fixedly connected to the outside of two sets of electromagnet coils 5 respectively, and the distance between the two pole plates 7 is equal to the width of the track 2.

[0039] Heat dissipation holes 8 are located on the plate 7 at positions corresponding to the cooling fan 6. For example... Figure 2 and Figure 6 As shown, multiple cooling fans 8 are provided along the length of the track 2, and heat dissipation holes 8 are provided on the plate 7 at positions corresponding to the cooling fans 6.

[0040] The cross-section of track 2 includes one horizontal segment and two vertical segments, with the tops of the two vertical segments connecting to the left and right ends of the horizontal segment, respectively. The thickness of the electrode plate 7 is the same as the thickness of the vertical segments.

[0041] Specifically, each set of electromagnet coils includes two electromagnet coils 5. The two electromagnet coils 5 located on the left and right sides of the front end of the partition 4 constitute one levitation control unit, and the two electromagnet coils 5 located on the left and right sides of the rear end of the partition 4 constitute another levitation control unit.

[0042] Specifically, the bottom of the stator core of the linear motor 3 is provided with a boss 31, and the top of the partition plate 4 is provided with a groove 41. During assembly, the boss 31 is embedded in the groove 41, and a connecting plate 42 is provided in the groove 41. The boss 31 and the connecting plate 42 are provided with matching mounting holes, and bolts are used to fix the boss 31 and the connecting plate 42 through the mounting holes.

[0043] As a preferred embodiment, guide devices 9 are respectively provided on the outer sides of the two electrode plates 7. The bottom of the guide device 9 is connected to the top of the electrode plate 7, and the top of the guide device 9 extends upward. The distance between the two guide devices 9 is greater than the width of the track 2. The guide device 9 has lateral protection and limiting functions to prevent excessive lateral displacement. The guide device is preferably implemented by using a lateral skid or guide wheel. A certain gap is maintained between the lateral skid and the outer side of the track. When the lateral displacement is too large, the lateral skid will limit the movement. The guide wheel is in rigid contact with the track and has guiding and limiting functions.

[0044] As a preferred embodiment, a suspension sensor 32 is provided at each end of the partition 4. Specifically, the front end of the partition 4 is provided with a first connecting block 401 and a second connecting block 402, and a suspension sensor 32 is installed on the first connecting block 401 and the second connecting block 402. The rear end of the partition 4 is provided with a third connecting block 403 and a fourth connecting block 404, and another suspension sensor 32 is installed on the third connecting block 403 and the fourth connecting block 404.

[0045] As a preferred embodiment, multiple anti-slip skids 10 are evenly arranged on the top of the electrode plate 7. Each anti-slip skid includes a friction block protruding towards the upper surface of the electrode plate. The anti-slip skids 10 are replaceable and evenly distributed at both ends and the middle of the electrode plate. The anti-slip skids and the electrode plate are installed in an embedded manner, with the steel back recessed into the upper surface of the electrode plate and the friction blocks exposed. Both sides are fixed with cover plates. The height difference between the top surface of the friction block and the upper surface of the electrode plate is generally 2mm to 3mm. When the traction suspension integrated device gets stuck or rubs against the track, the friction blocks of the anti-slip skids are worn down first, preventing damage to the track or electrode plate.

[0046] As a preferred embodiment, it also includes a temperature sensor and a controller; the temperature sensor is used to detect the temperature of the coil of the linear motor and / or electromagnet; the controller is configured to control the number of cooling fans that are turned on based on the temperature value detected by the temperature sensor. For example, such as Figure 6 As shown, the cooling fans 6 are divided into two groups with alternating up-and-down intervals. Specifically, 6-1, 6-4, 6-5, 6-8, 6-9, 6-12, and 6-13 form one group, while 6-2, 6-3, 6-6, 6-7, 6-10, 6-11, and 6-14 form another group. The two groups are controlled independently. When the temperature value detected by the temperature sensor is higher than a first temperature threshold, the controller activates one group of cooling fans. When the temperature value detected by the temperature sensor is higher than a second temperature threshold, the controller activates both groups of cooling fans. The second temperature threshold is higher than the first temperature threshold.

[0047] Specifically, the motor air gap That is, the vertical distance between the upper surface of the linear motor and the lower surface of the sensing plate, and the mechanical clearance of the suspension sensor. That is, the vertical distance between the suspension sensor and the lower surface of the sensing plate, the suspension gap. That is, the vertical distance between the lower surface of the track and the upper surface of the electrode plate; , ;in, The dead zone threshold of the gap probe of the suspension sensor. A thickness of ≥2mm is generally recommended. The mechanical protection threshold for linear motors is generally recommended to be no less than 0.5 mm.

[0048] ,in The vertical distance between the upper surface of the electromagnet coil and the upper surface of the partition plate. , For the width of the cooling fan, This is the distance between the cooling fan and the upper surface of the electromagnet coil. The distance between the cooling fan and the upper surface of the partition.

[0049] Specifically, the levitation force is provided by the electromagnetic force of the electromagnet coil and the normal force of the linear motor. The electromagnetic force of the electromagnet coil must satisfy the following:

[0050]

[0051]

[0052]

[0053] in, Electromagnetic force of the first coil of the electromagnet Electromagnetic force of the second coil Electromagnetic force of the third coil and the electromagnetic force of the fourth coil The combined force The permeability of free space, This is the effective attraction area between the electromagnet and the track. For the suspension gap, the number of coil turns The current flowing through the coil of the electromagnet , The rated levitation force of the electromagnet coil in the traction levitation integrated device, For the traction suspension integrated device, the electromagnet wire is wrapped in The maximum electromagnetic force provided within a time period, This refers to the vehicle's maximum load weight. The minimum normal force for a linear motor. For the maximum allowable off-center load, This refers to the number of integrated traction and suspension devices.

[0054] The electromagnetic force, normal force, and maximum vehicle load weight of the traction suspension system must meet the following requirements:

[0055]

[0056] in This refers to the vehicle's maximum load capacity, including its own weight and passenger capacity under AW3 operating conditions. For the first Normal force of the linear motor in the traction suspension integrated device. For the first The rated electromagnetic force provided by all electromagnet coils of the traction suspension integrated device.

[0057] Example 2

[0058] A maglev vehicle has the aforementioned levitation device mounted underneath it. Specifically, a bogie is provided underneath the maglev vehicle, and a support arm is provided on the side of the maglev device. The support arm is fixedly connected to the bogie, thereby mounting the maglev device on the bogie.

[0059] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0060] Similarly, it should be understood that, in order to streamline this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0061] Those skilled in the art will understand that the modules, units, or groups of devices in the examples disclosed herein can be arranged in the device as described in this embodiment, or alternatively, can be located in one or more devices different from the device in this example. The modules in the foregoing examples can be combined into a single module or further divided into multiple sub-modules.

[0062] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or groups in the embodiments can be combined into a single module, unit, or group, and further, they can be divided into multiple sub-modules, sub-units, or sub-groups. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0063] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention and form different embodiments.

[0064] Furthermore, some of the embodiments described herein are methods or combinations of method elements that can be implemented by a controller of a computer system or by other means of performing the functions. Therefore, a controller having the necessary instructions for implementing the method or method element forms a means for implementing the method or method element. Furthermore, the elements described herein in the apparatus embodiments are examples of means for implementing functions performed by elements for the purposes of carrying out the invention.

[0065] The various techniques described herein can be implemented in combination with hardware or software, or a combination thereof. Thus, the methods and apparatus of the present invention, or certain aspects or portions thereof, can take the form of program code (i.e., instructions) embedded in a tangible medium, such as a floppy disk, CD-ROM, hard disk, or any other machine-readable storage medium, wherein when the program is loaded into and executed by a machine such as a computer, the machine becomes an apparatus for practicing the present invention.

[0066] When the program code is executed on a programmable computer, the computing device generally includes a controller, a controller-readable storage medium (including volatile and non-volatile memory and / or storage elements), at least one input device, and at least one output device. The memory is configured to store program code; the controller is configured to execute the method of the present invention according to instructions in the program code stored in the memory.

[0067] By way of example, and not limitation, computer-readable media include computer storage media and communication media. Computer storage media stores information such as computer-readable instructions, data structures, program modules, or other data. Communication media generally embodies computer-readable instructions, data structures, program modules, or other data in the form of modulated data signals such as carrier waves or other transmission mechanisms, and includes any information delivery medium. Any combination of the above is also included within the scope of computer-readable media.

[0068] As used herein, unless otherwise specified, the use of ordinal numbers such as “first,” “second,” “third,” etc., to describe ordinary objects merely indicates different instances of similar objects and is not intended to imply that the objects being described must have a given order in time, space, ordering, or any other manner.

[0069] Although the invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for the purpose of interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the invention is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.

[0070] Finally, it should be noted that this invention does not explain in detail the common knowledge recognized by those skilled in the art. The above description is only a specific embodiment of this invention and is not intended to limit this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A levitation device for a maglev vehicle, characterized in that, include: The sensor plate is located on the lower surface of the track. A linear motor is positioned directly below the induction plate; A partition, the top of which is connected to the middle of the lower surface of the linear motor, and the bottom of which extends downward; Two sets of electromagnet coils are connected to the lower parts of the left and right sides of the partition, respectively; Cooling fans are connected to the upper parts of the left and right sides of the partition, respectively, and are located between the linear motor and the electromagnet coil; Two pole plates are fixedly connected to the outer sides of two sets of electromagnet coils, respectively; the distance between the two pole plates is equal to the width of the track. The heat dissipation holes are located on the electrode plate at positions corresponding to the cooling fan.

2. The levitation device for a maglev vehicle according to claim 1, characterized in that: Multiple cooling fans are provided along the length of the track, and heat dissipation holes are provided on the electrode plate at positions corresponding to the cooling fans.

3. The levitation device for a maglev vehicle according to claim 1 or 2, characterized in that: The outer sides of the two electrode plates are provided with guide devices. The bottom of the guide device is connected to the top of the electrode plate, and the top of the guide device extends upward. The distance between the two guide devices is greater than the width of the track.

4. The levitation device for a maglev vehicle according to claim 1 or 2, characterized in that: A suspension sensor is provided at each end of the partition.

5. The levitation device for a maglev vehicle according to claim 1 or 2, characterized in that: The top of the electrode plate is evenly arranged with multiple anti-slip skids; the anti-slip skids include friction blocks protruding onto the upper surface of the electrode plate.

6. The levitation device for a maglev vehicle according to claim 1 or 2, characterized in that: It also includes a temperature sensor and a controller; the temperature sensor is used to detect the temperature of the coil of the linear motor and / or electromagnet; the controller is configured to control the number of cooling fans to be turned on based on the temperature value detected by the temperature sensor.

7. The levitation device for a maglev vehicle according to claim 1 or 2, characterized in that: The cross-section of the track includes a horizontal segment and two vertical segments, with the top ends of the two vertical segments connected to the left and right ends of the horizontal segment, respectively; the thickness of the vertical segments is the same as the thickness of the electrode plate.

8. A maglev vehicle, characterized in that: The maglev vehicle is equipped with a levitation device as described in any one of claims 1-7.

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