V-shaped track high-temperature superconducting magnetic levitation structure and V-shaped track section optimization method

Abstract

The invention relates to the technical field of magnetic levitation, and discloses a V-shaped track high-temperature superconducting magnetic levitation structure and a V-shaped track section optimization method.The V-shaped track high-temperature superconducting magnetic levitation structure comprises a track foundation, and the track foundation comprises a track base and a pair of V-shaped tracks arranged on the two sides of the track base; the V-shaped track comprises a foundation and a pair of permanent magnet tracks which are symmetrically and obliquely arranged on the foundation; a plurality of suspension frames are arranged in parallel, each suspension frame comprises a framework used for being connected with a vehicle body and two sets of suspension devices arranged on the framework, each suspension device comprises a heat preservation Dewar container used for being connected with the framework and an electromagnetic shunt damper arranged at the bottom of the heat preservation Dewar container, and a high-temperature superconducting block is arranged in each heat preservation Dewar container. The heat preservation Dewar type container is in sliding fit between the pair of permanent magnet rails, the electromagnetic shunt damper penetrates through the gap between the pair of permanent magnet rails to be in sliding fit with the rail base, the suspension guiding capacity of a vehicle is remarkably enhanced, and the safety and stability of vehicle operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of maglev technology, and particularly to a V-shaped track high-temperature superconducting maglev structure and a method for optimizing the cross-section of a V-shaped track. Background Art

[0002] The high-temperature superconducting pinned maglev technology relies on the unique superconducting properties of high-temperature superconducting bulk materials, enabling the vehicle to stably levitate above the permanent magnet track and achieve frictionless high-speed operation through linear motors.

[0003] In traditional maglev structures, the permanent magnet tracks are usually laid horizontally, with weak suspension and guiding performance. At the same time, the high-temperature superconducting maglev system in traditional maglev structures has weak damping characteristics, and due to its special suspension mechanism, the vehicle's vibration reduction mainly relies on the secondary suspension system, resulting in poor safety and stability. Summary of the Invention

[0004] The purpose of the present invention is to provide a V-shaped track high-temperature superconducting maglev structure and a method for optimizing the cross-section of a V-shaped track, aiming to solve or improve at least one of the above technical problems.

[0005] To achieve the above purpose, the present invention provides the following solutions: The present invention provides a V-shaped track high-temperature superconducting maglev structure, including:

[0006] A track foundation, including a track base and a pair of V-shaped tracks arranged on both sides of the track base. The V-shaped track includes a foundation and a pair of symmetrically inclined permanent magnet tracks arranged on the foundation. There is a gap between the pair of permanent magnet tracks;

[0007] A plurality of suspension frames arranged in parallel. The suspension frame includes a framework for connecting with the vehicle body and two groups of suspension devices arranged on the framework. The suspension device includes a cryogenic dewar container for connecting the framework and an electromagnetic shunt damper arranged at the bottom of the cryogenic dewar container. A high-temperature superconducting bulk material is arranged in the cryogenic dewar container. The cryogenic dewar container is slidably matched between the pair of permanent magnet tracks, and the electromagnetic shunt damper passes through the gap between the pair of permanent magnet tracks and is slidably matched with the track base.

[0008] Optionally, inclined grooves for cooperating with the pair of permanent magnet tracks are provided on the foundation, and track supports for supporting the permanent magnet tracks are arranged in the inclined grooves.

[0009] Optionally, buffer fasteners are arranged between the track support and the inclined groove.

[0010] Optionally, guide grooves are provided on the bottom surface of the inclined groove, and a plurality of telescopic support wheels for slidably cooperating with the guide grooves are arranged on the bottom surface of the electromagnetic shunt damper.

[0011] Optionally, a rotating bearing is provided on the top surface of the thermal insulation dewar container, and a transverse sliding table is rotatably fitted on the rotating bearing, and the transverse sliding table is connected to the framework.

[0012] Optionally, the framework is connected to the vehicle body through an air spring.

[0013] Optionally, a linear motor is provided on the framework.

[0014] Optionally, a pair of the permanent magnet tracks are arranged in opposite polarities.

[0015] Optionally, the electromagnetic shunt damper is of a multi-branch parallel structure.

[0016] A V-shaped track cross-section optimization method includes:

[0017] Obtaining initial cross-section parameters of the V-shaped track;

[0018] Calculating the levitation force;

[0019] Judging whether the levitation efficiency meets the standard based on the levitation force. If the levitation efficiency does not meet the standard, the initial cross-section parameters are adjusted by a processing module and then the levitation force is recalculated.

[0020] The present invention discloses the following technical effects: By arranging a pair of permanent magnet tracks obliquely to form a V-shaped track, compared with the laying method of a horizontal track, the levitation and guiding ability of the vehicle is significantly enhanced, providing a more reliable guarantee for the high-speed and stable operation of the vehicle. At the same time, an electromagnetic shunt damper is arranged in the levitator below the framework as a primary suspension of the vehicle, which not only improves the safety and smoothness of the vehicle operation, but also further improves the overall performance. Moreover, there is both an available magnetic field and space to load the electromagnetic shunt damper below the V-shaped track, further improving the magnetic field utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a front view of the suspension frame and track foundation of the present invention;

[0024] Figure 3 is a perspective view of the suspension frame of the present invention;

[0025] Figure 4Stereogram of the levitator of the present invention;

[0026] Figure 5 Stereogram of the V-shaped track of the present invention;

[0027] Figure 6 Schematic flow chart of the V-shaped track cross-section optimization method of the present invention;

[0028] Figure 7 Circuit diagram of the parallel structure of the electromagnetic shunt damper of the present invention.

[0029] In the figure: 1. Suspension frame; 10. Levitator; 101. Thermal insulation dewar container; 102. Transverse sliding table; 103. Rotating bearing; 104. Electromagnetic shunt damper; 105. Telescopic support wheel; 11. Air spring; 12. Frame; 13. Linear motor; 2. Track foundation; 20. V-shaped track; 201. Permanent magnet track; 202. Track support; 203. Buffer fastener; 21. Track base; 211. Foundation; 212. Guide groove; 3. Vehicle body. 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 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 shall fall within the protection scope of the present invention.

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0032] Refer to Figures 1 - 7 , the present invention provides a V-shaped track high-temperature superconducting maglev structure, including:

[0033] A track foundation 2, including a track base 21 and a pair of V-shaped tracks 20 arranged on both sides of the track base 21. The V-shaped track 20 includes a foundation 211 and a pair of symmetrically inclined permanent magnet tracks 201 arranged on the foundation 211. There is a gap between the pair of permanent magnet tracks 201;

[0034] Multiple suspension frames 1 are arranged in parallel. The suspension frame 1 includes a framework 12 for connecting with the vehicle body 3 and two groups of suspension devices 10 arranged on the framework 12. The suspension device 10 includes a cryogenic dewar container 101 for connecting the framework 12 and an electromagnetic shunt damper 104 arranged at the bottom of the cryogenic dewar container 101. A high-temperature superconducting bulk material is arranged in the cryogenic dewar container 101. The cryogenic dewar container 101 is in sliding fit between a pair of permanent magnet tracks 201, and the electromagnetic shunt damper 104 passes through the gap between the pair of permanent magnet tracks 201 and is in sliding fit with the track base 21.

[0035] By arranging a pair of permanent magnet tracks 201 in an inclined manner to form a V-shaped track 20, compared with the laying method of a horizontal track, the suspension and guiding ability of the vehicle is significantly enhanced, providing a more reliable guarantee for the high-speed and stable operation of the vehicle. At the same time, an electromagnetic shunt damper 104 is arranged in the suspension device 10 below the framework 12. As the primary suspension of the vehicle, it not only improves the safety and smoothness of the vehicle operation but also further enhances the overall performance. Moreover, there is both an available magnetic field and space to load the electromagnetic shunt damper 104 below the V-shaped track 20, further improving the magnetic field utilization rate.

[0036] Furthermore, the configuration of the cryogenic dewar container 101 is adapted to the inclination angle of the pair of permanent magnet tracks 201, making the arrangement of the internal high-temperature superconducting bulk material parallel to the permanent magnet tracks 201 to ensure the suspension and guiding performance.

[0037] In an embodiment of the present invention, an inclined surface groove for cooperating with the pair of permanent magnet tracks 201 is formed on the foundation 211, and a track support 202 for supporting the permanent magnet tracks 201 is arranged in the inclined surface groove.

[0038] In an embodiment of the present invention, a buffer fastener 203 is arranged between the track support 202 and the inclined surface groove.

[0039] In an embodiment of the present invention, a guide groove 212 is arranged on the bottom surface of the inclined surface groove, and a plurality of telescopic support wheels 105 for slidingly cooperating with the guide groove 212 are arranged on the bottom surface of the electromagnetic shunt damper 104.

[0040] In an embodiment of the present invention, a rotating bearing 103 is arranged on the top surface of the cryogenic dewar container 101, a transverse sliding table 102 is rotatably fitted on the rotating bearing 103, and the transverse sliding table 102 is connected with the framework 12.

[0041] By arranging the rotating bearing 103 and the transverse sliding table 102, the vehicle body 3 can be more flexible when facing a curve, ensuring the stability and comfort during the driving process.

[0042] Furthermore, an integrated design is carried out for the thermal insulation Dewar container 101, the telescopic support wheel 105, the electromagnetic shunt damper 104, the rotating bearing 103 and the transverse slide 102, which not only simplifies the complexity of the vehicle suspension frame, but also realizes multiple functions of suspension guidance, curve passing, vibration damping and safety support.

[0043] In an embodiment of the present invention, the frame 12 is connected to the vehicle body 3 through an air spring 11.

[0044] In an embodiment of the present invention, a linear motor 13 is provided on the frame 12.

[0045] Due to the unique flux pinning effect of the high-temperature superconducting bulk material in the thermal insulation Dewar container 101 of the suspension 10 under the suspension frame 1, the vehicle body 3 can be stably suspended above the permanent magnet track 201 and driven by the linear motor 13 to achieve frictionless high-speed operation.

[0046] In an embodiment of the present invention, a pair of permanent magnet tracks 201 are arranged with opposite poles, which avoids the situation that the traditional Halbach structure concentrates the magnetic field on the track surface, so that the magnetic field is squeezed in the center and below the V-shaped track 20, providing a dense magnetic field and gradient for the superconducting suspension to improve the suspension performance.

[0047] In an embodiment of the present invention, as shown in Figure -, the electromagnetic shunt damper 104 is a multi-branch parallel structure. Therefore, when there are 2 parallel branches, the circuit equation is updated as:

[0048]

[0049] The resonant frequency of the multi-branch parallel EMSD can be obtained through numerical simulation. By matching the resonant frequencies of each branch with the frequencies of multi-source excitations or the multi-order natural frequencies of the system, multi-frequency resonance is achieved, thereby converting multi-modal mechanical vibrations into multi-branch electromagnetic oscillations. The inductance and resistance in the main circuit are the properties of the damping coil (actuator), and the interaction between the main circuit current and the track magnetic field provides a damping force for the suspension system. When the frequency of the induced electromotive force in the main circuit matches the resonant frequency of branch 1, the current mainly passes through branch 1; when it matches the resonant frequency of branch 2, the current mainly passes through branch 2. When the induced electromotive force contains multiple frequency components (i.e., when the suspension system undergoes multi-modal vibrations), multiple branches participate in resonance together, and the purpose of adaptive multi-modal vibration reduction is achieved by consuming energy in the resistor. Specifically, if the resonant frequency of a certain branch is equal to the mechanical vibration frequency, the total impedance of this branch is smaller, and the current will pass through it in a band-pass filtering manner and be consumed in the resistor or stored in the energy storage element; when the vibration frequency is higher, the high-frequency branch plays a major role in suppressing vibrations; when the vibration frequency is lower, the low-frequency branch plays a major role in suppressing vibrations, and so on. Generally, vibrations are the superposition of multiple frequencies (modes), so multiple branches jointly bear the role of suppressing vibrations, that is, "multi-modal vibration reduction". The induced current can achieve adaptive shunting according to the excitation frequency, thereby achieving adaptive vibration reduction.

[0050] Precise design of electromagnetic parameters is achieved through a multi-branch parallel circuit, which can effectively match the dynamic responses of different frequencies and achieve multi-modal adaptive vibration reduction in a passive manner. In this way, without relying on an active control system, optimized damping effects can be provided for various vibration modes in the vehicle-track system, significantly improving the vibration reduction performance of the system. For different vibration frequencies, adjustments can be made by replacing components such as capacitors and inductors in the branch. The structure is simple and the cost is low.

[0051] By adding a circuit system composed of capacitors, inductors, and resistors outside the damping coil, the damper only shows resistive properties during the vibration reduction process and is phase-synchronized with the mechanical vibration. In this way, the vibration energy can be effectively consumed in the resistor or stored after rectification, rather than simply transferred, thereby improving the vibration reduction efficiency and enhancing the stability of the system.

[0052] The present invention realizes multi-modal vibration reduction in the way of multi-frequency resonance. For the vibration modes of the vehicle-track system, precise design of electromagnetic parameters is completed through multiple parallel circuits, achieving adaptive matching of dynamic responses at different frequencies, and inducing current in a passive manner without relying on an active control system.

[0053] A method for optimizing the V-shaped track cross-section includes:

[0054] Obtain the initial cross-section parameters of the V-shaped track 20;

[0055] Calculate the levitation force based on electromagnetic theory;

[0056] Judge whether the suspension efficiency meets the standard based on the suspension force. If the suspension efficiency does not meet the standard, the initial cross-section parameters are adjusted by the processing module and the suspension force is recalculated.

[0057] The processing module includes intelligent algorithms such as genetic algorithms and particle swarm algorithms.

[0058] Based on the above method, by changing the track base 21, the width of the V-shaped track 20 and the inclination angle of the permanent magnet track 201 are adjusted, which provides strong technical support for the safe and efficient operation of the high-temperature superconducting maglev vehicle while reducing costs.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0060] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A V-type track high temperature superconducting maglev structure, characterized in that: include: A track foundation (2) comprises a track base (21) and a pair of V-shaped tracks (20) arranged on both sides of the track base (21), wherein the V-shaped track (20) comprises a foundation (211) and a pair of symmetrically inclined permanent magnetic tracks (201) arranged on the foundation (211), and a gap is provided between the pair of permanent magnetic tracks (201); A plurality of suspension frames (1) are arranged in parallel, the suspension frames (1) comprising a frame (12) for connecting to a vehicle body (3) and two groups of suspension devices (10) arranged on the frame (12), the suspension devices (10) comprising a heat preservation Dewar container (101) for connecting to the frame (12) and an electromagnetic shunt damper (104) arranged at the bottom of the heat preservation Dewar container (101), a high-temperature superconducting block material is arranged in the heat preservation Dewar container (101), the heat preservation Dewar container (101) is slidably matched between a pair of permanent magnetic tracks (201), and the electromagnetic shunt damper (104) passes through a gap between the pair of permanent magnetic tracks (201) and is slidably matched with the track base (21).

2. A V-shaped track high temperature superconducting maglev structure according to claim 1, characterized in that: The foundation (211) is provided with an inclined groove for matching with a pair of permanent magnetic tracks (201), and a track support (202) for supporting the permanent magnetic tracks (201) is arranged in the inclined groove.

3. A V-shaped track high temperature superconducting maglev structure according to claim 2, characterized in that: A buffer fastener (203) is provided between the track support (202) and the inclined surface groove.

4. A V-shaped track high temperature superconducting maglev structure according to claim 2, characterized in that: A guide groove (212) is provided on the bottom surface of the inclined groove, and a plurality of telescopic support wheels (105) for slidingly cooperating with the guide groove (212) are provided on the bottom surface of the electromagnetic shunt damper (104).

5. The V-track high temperature superconducting maglev structure according to claim 1, characterized in that: The top surface of the heat-insulating Dewar container (101) is provided with a rotating bearing (103), and a transverse slide (102) is rotatably matched on the rotating bearing (103), and the transverse slide (102) is connected to the frame (12).

6. A V-shaped track high temperature superconducting maglev structure according to claim 1, characterized in that: The frame (12) and the vehicle body (3) are connected via an air spring (11).

7. The V-track high temperature superconducting maglev structure according to claim 1, characterized in that: A linear motor (13) is arranged on the frame (12).

8. The V-track high temperature superconducting maglev structure according to claim 1, characterized in that: A pair of permanent magnetic tracks (201) are arranged in opposite poles.

9. The V-track high temperature superconducting maglev structure according to claim 1, characterized in that: The electromagnetic shunt damper (104) is a multi-branch parallel structure.

10. A method for optimizing a V-shaped track cross section, based on a V-shaped track high temperature superconducting maglev structure according to any one of claims 1 to 9, characterized in that: include: Obtaining initial cross-sectional parameters of the V-shaped track (20); The suspension force is calculated; Based on the suspension force, it is determined whether the suspension efficiency meets the standard. If the suspension efficiency does not meet the standard, the suspension force is recalculated after adjusting the initial cross-sectional parameters through a processing module.

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