Noise-proof device applied to superconducting high-speed maglev track

Abstract

The application provides a noise-proof device applied to a superconducting high-speed maglev track and relates to the technical field of maglev tracks, which comprises a U-shaped track beam, and a plurality of noise reduction units are arranged at intervals on the inner side walls of the U-shaped track beam; the noise reduction unit comprises a mounting body connected to the inner side walls of the U-shaped track beam, an inner cavity is formed in the mounting body, air holes are formed at both ends of the mounting body along the length direction of the U-shaped track beam, the air holes are used for connecting the inner cavity and the outside, and in the working state, vibrating airflow enters the inner cavity from the air hole on one side of the mounting body and is guided out from the air hole on the other side of the mounting body, so that a stable noise reduction effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation track technology, and in particular to a noise reduction device for superconducting high-speed magnetic levitation tracks. Background Technology

[0002] Superconducting high-speed maglev transportation technology features large levitation gaps and high operating speeds, effectively shortening travel time between two locations. Furthermore, its passive control strategy demonstrates promising application prospects. However, the increased speed inevitably generates significant noise interference to the track and its surrounding environment. Therefore, implementing effective noise reduction measures to lower the noise levels of the track and its surroundings has become a pressing issue in the development of superconducting high-speed maglev transportation.

[0003] Due to the characteristics of the track structure of superconducting high-speed maglev transportation, it is impossible to install corresponding sound barriers or other related noise insulation devices. Therefore, it is necessary to propose a noise reduction device for superconducting high-speed maglev track, taking into account the characteristics and advantages of the track structure. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to reduce the noise of the railway track and its surrounding environment.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] This invention proposes a noise reduction device for superconducting high-speed maglev tracks, comprising a U-shaped track beam, wherein multiple noise reduction units are spaced apart on the inner sidewall of the U-shaped track beam;

[0007] The noise reduction unit includes a mounting body connected to the inner wall of the U-shaped track beam. The mounting body has an inner cavity. Air holes are provided at both ends of the mounting body along the length of the U-shaped track beam. The air holes are used to connect the inner cavity with the outside. In the working state, the vibrating airflow enters the inner cavity from the air hole on one side of the mounting body and is then discharged from the air hole on the other side of the mounting body, thereby achieving a stable noise reduction effect.

[0008] Furthermore, multiple noise reduction units are provided on the two inner sidewalls opposite each other of the U-shaped track beam, and noise reduction units are provided on both sides of the U-shaped track beam to further improve the noise reduction characteristics of the device.

[0009] Furthermore, the multiple noise reduction units on the two inner walls of the aforementioned U-shaped track beam are symmetrically arranged based on the centerline of the length direction of the U-shaped track beam. The symmetrical arrangement of the noise reduction units on the two inner walls of the U-shaped track beam can ensure that the noise reduction effect on both sides of the track is uniform and improve the overall noise reduction effect.

[0010] Furthermore, the air holes on both sides of the aforementioned mounting body are arranged in multiple, spaced-apart configurations. The arrangement of multiple air holes facilitates the rapid vibration reduction and flow of the vibrating airflow.

[0011] Furthermore, the aforementioned mounting body includes two side plates disposed opposite to each other on the inner wall of the aforementioned U-shaped track beam, a plurality of the aforementioned air holes are opened on the aforementioned side plates, and a sealing shell is fastened to the outer side of the two aforementioned side plates. The two aforementioned side plates, the aforementioned sealing shell, and the aforementioned inner wall of the aforementioned U-shaped track beam together form the aforementioned inner cavity, which specifically defines the specific structure of the mounting body. Such a structure is convenient for processing and installation, and has a low cost.

[0012] Furthermore, a connecting rib is provided between the two side plates. The connecting rib is located within the inner cavity. The connection rib ensures that the two side plates are stably connected and will not undergo relative positional changes.

[0013] Furthermore, the aforementioned side plate is perpendicular to the bottom wall of the aforementioned U-shaped track beam, and the aforementioned air holes are parallel to the bottom end of the aforementioned side plate, so that the direction of the air holes is parallel to the extension direction of the U-shaped track beam, thereby improving the efficiency of the vibrating airflow entering and exiting the air holes.

[0014] Furthermore, the multiple air holes on the two side plates are respectively arranged one-to-one, and the air holes on both side plates are respectively arranged one-to-one, to ensure better airflow of vibration and improve noise reduction efficiency.

[0015] Furthermore, the above-mentioned air hole is rectangular in shape, and the inner wall of one side of the air hole coincides with the inner wall of the corresponding side of the U-shaped track beam. The above structure ensures that the air hole has a sufficient opening size, further improving the flow efficiency of the vibrating airflow.

[0016] The beneficial effects of this invention are:

[0017] When a superconducting high-speed maglev train runs on a U-shaped track beam, it will generate air vibration noise along the U-shaped track due to the suspension of the vehicle on both sides and the guiding movement of the train. This vibration airflow enters the inner cavity through an air hole on one side of the noise reduction unit. The vibration airflow entering the inner cavity interacts with the inner wall of the noise reduction unit, producing the effects of vibration absorption and damping. The vibration airflow that has completed vibration absorption and damping is discharged from the air hole on the other side, reducing the vibration frequency of the vibration airflow and thus reducing noise. Moreover, the installation body isolates the propagation of sound, further improving the noise reduction effect and reducing the impact of the environment along the maglev train's operation. The structure is compact, reasonable, and durable. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the noise reduction unit installation structure of the present invention. Figure 1 ;

[0020] Figure 3 This is a schematic diagram of the transverse cross-section of the present invention;

[0021] Figure 4 This is a schematic diagram of the noise reduction unit installation structure of the present invention. Figure 2 ;

[0022] The markings in the diagram are: 1-U-shaped track beam, 2-mounting body, 3-air hole, 4-inner cavity, 201-side plate, 202-sealing shell, 203-connecting rib. Detailed Implementation

[0023] The invention will be further described below with reference to the accompanying drawings.

[0024] according to Figures 1-4 As shown in the figure, this application embodiment proposes a noise reduction device for superconducting high-speed maglev tracks, including a U-shaped track beam 1, wherein multiple noise reduction units are spaced apart on the inner sidewall of the U-shaped track beam 1;

[0025] The noise reduction unit includes a mounting body 2 connected to the inner wall of the U-shaped track beam 1. The mounting body 2 has an inner cavity 4. Air holes 3 are provided at both ends of the mounting body 2 along the length of the U-shaped track beam 1. The air holes 3 are used to connect the inner cavity 4 with the outside. In the working state, the vibrating airflow enters the inner cavity 4 from the air hole 3 on one side of the mounting body 2 and then exits from the air hole 3 on the other side of the mounting body 2.

[0026] It should be noted that when the superconducting high-speed maglev train runs on the U-shaped track beam, it will generate air vibration noise along the U-shaped track due to the suspension of the vehicle on both sides and the guiding movement of the train. This vibration airflow enters the inner cavity 4 through the air hole 3 on one side of the noise reduction unit. The vibration airflow entering the inner cavity 4 interacts with the inner wall of the inner cavity 4 of the noise reduction unit, producing the effect of vibration absorption and damping. The vibration airflow that has completed vibration absorption and damping is discharged from the air hole 3 on the other side, reducing the vibration frequency of the vibration airflow, thereby reducing the noise effect. Moreover, the mounting body 2 isolates the propagation of sound, further achieving a stable noise reduction effect, reducing the impact of the environment along the maglev train during operation. The structure is compact and reasonable, with good durability, and is suitable for the working environment of superconducting high-speed maglev vehicles running on U-shaped tracks.

[0027] Specifically, the bottom wall of the aforementioned U-shaped track beam 1 is provided with a raised support wheel track, and the lower end of the aforementioned mounting body 2 is higher than the aforementioned support wheel track. Moreover, in order to improve the overall noise reduction characteristics of the U-shaped track beam 1 and ensure that the track space on both sides of the support wheel track can be uniformly noise-reduced, multiple noise reduction units are provided on the two opposite inner sidewalls of the aforementioned U-shaped track beam 1. That is to say, when the train passes through the position of the U-shaped track beam 1 at high speed, the superconducting levitation track generates vibration noise on both sides of the support wheel track under high-speed operation. The vibration noise propagates in the U-shaped track beam 1. During the propagation process, the noise reduction structure on both sides can simultaneously suppress the propagation of most of the noise in the U-shaped track beam 1. Moreover, in order to ensure a uniform noise reduction effect, the multiple noise reduction units on the two inner sidewalls of the aforementioned U-shaped track beam 1 are symmetrically arranged based on the centerline of the length direction of the aforementioned U-shaped track beam 1. The multiple noise reduction units on both sidewalls of the U-shaped track beam 1 are arranged and extended at intervals along the extension direction of the U-shaped track beam 1, which can ensure continuous noise reduction effect on the vehicle running line.

[0028] Regarding the structure of the noise reduction unit, the mounting body 2 can be a shell-shaped or cavity-shaped mounting block. The mounting block is fixed to the inner wall of the U-shaped track beam 1 by welding, integral connection, or screw connection to ensure the stability of the connection. Moreover, the air holes 3 on both sides of the mounting body 2 are arranged in multiple spaced intervals. That is to say, when the superconducting high-speed maglev train runs on the U-shaped track beam, the vibrating airflow generated by the high-speed operation can enter the inner cavity 4 through the multiple air holes 3 on one side of the mounting body 2, which improves the efficiency of the vibrating airflow entering the inner cavity 4. At the same time, it also improves the efficiency of the airflow after vibration reduction being discharged from the air holes 3 on the other side, thereby improving the noise reduction effect.

[0029] Regarding the specific structure of the aforementioned mounting body 2, the mounting body 2 includes two side plates 201 arranged opposite to each other along the length direction of the U-shaped track beam 1 on the inner sidewall of the U-shaped track beam 1. Multiple air holes 3 are formed in the side plates 201, and sealing shells 202 are fastened to the outer sides of the two side plates 201. The two side plates 201, the sealing shells 202, and the inner sidewall of the U-shaped track beam 1 together form the inner cavity 4. In the actual manufacturing process of the device, the two side plates 201 are fixedly connected to the U-shaped track beam 1 by welding or screws. The inner wall of the track beam 1, and the two side plates 201 are parallel to each other and have the same bottom height. The sealing shell 202 is fastened to the outside of the two side plates 201. The sealing shell 202 is specifically a U-shaped shell. The sealing shell 202 is fixed to the two side plates 201 by screw connection. The seal can seal the gap between the two side plates 201 to form the inner cavity 4. The air holes 3 on the two side plates 201 can connect the inner cavity 4 and the outside space, ensuring that the vibration airflow enters the inner cavity 4 through the air holes 3 and leaks from other parts except the air holes 3.

[0030] To further ensure the efficiency and accuracy of the processing, a connecting rib 203 is connected between the two side plates 201 in a set. The connecting rib 203 is located inside the inner cavity 4. In actual processing, the two side plates 201 are first connected by the connecting rib 203, and then the two side plates 201 connected as a whole are installed on the U-shaped track beam 1. During the installation process, the positioning of the two side plates 201 will not be misaligned, ensuring the accuracy of the installation process.

[0031] Furthermore, the length direction of the aforementioned side plate 201 is perpendicular to the extension direction of the aforementioned U-shaped track beam 1, that is, the aforementioned side plate 201 is perpendicular to the bottom wall of the aforementioned U-shaped track beam 1, and the extension direction of the aforementioned air hole 3 is parallel to the bottom end of the aforementioned side plate 201. In other words, the mounting body 2 formed by the aforementioned side plate 201 and the sealing shell 202 is set parallel to the extension direction of the U-shaped track beam 1, ensuring that the extension direction of the air hole 3 is parallel to the U-shaped track beam 1, that is, consistent with the train's travel direction, ensuring that the direction of the vibrating airflow under high-speed train operation is consistent with the extension direction of the air hole 3, improving the efficiency of the vibrating airflow passing through the air hole 3, and thus improving the overall noise reduction performance of the device.

[0032] Furthermore, the multiple air holes 3 on the two side plates 201 are respectively set one-to-one, which facilitates the uniform processing of the side plates 201 and improves the air intake and exhaust effect, thereby further ensuring the efficiency of the vibration airflow through the entire noise reduction unit.

[0033] Furthermore, in some embodiments, the air holes 3 are set as rectangles, and one side of the cross-section of the air hole 3 coincides with the inner wall of the U-shaped track beam 1, so that the multiple air holes 3 can be distributed more densely on the side end face of the side plate 201, and the distribution of the air holes 3 is more reasonable, and the processing is more convenient, thus reducing costs.

[0034] In summary, this invention proposes a noise reduction device for superconducting high-speed maglev tracks, comprising a U-shaped track beam 1. Multiple noise reduction units are spaced apart along the length of the inner wall of the U-shaped track beam 1. Each noise reduction unit includes a mounting body 2 connected to the inner wall of the U-shaped track beam 1. An inner cavity 4 is formed within the mounting body 2. Air holes 3 are formed at both ends of the mounting body 2 along the length of the U-shaped track beam 1, connecting the inner cavity 4 to the external space. In operation, the vibrating airflow enters the inner cavity 4 through the air hole 3 on one side of the mounting body 2 and exits through the air hole 3 on the other side. The vibrating airflow enters the inner cavity 4 through the air hole 3 on one side of the noise reduction unit. The vibrating airflow interacts with the inner wall of the inner cavity 4, generating vibration absorption and damping effects. The vibration-damped airflow is then exited through the air hole 3 on the other side, reducing the vibration frequency of the airflow and thus reducing noise. Furthermore, the device has a simple structure, is easy to manufacture, and offers good economic benefits.

Claims

1. A noise reduction device applied to superconducting high-speed maglev tracks, characterized in that, It includes a U-shaped track beam (1), and the inner sidewall of the U-shaped track beam (1) is provided with multiple noise reduction units at intervals along the length direction; The noise reduction unit includes a mounting body (2) connected to the inner wall of the U-shaped track beam (1). The mounting body (2) has an inner cavity (4). Air holes (3) are provided at both ends of the mounting body (2) along the length direction of the U-shaped track beam (1). The air holes (3) are used to connect the inner cavity (4) and the outside space. In the working state, the vibrating airflow enters the inner cavity (4) from the air hole (3) on one side of the mounting body (2) and then exits from the air hole (3) on the other side of the mounting body (2). The air holes (3) on both sides of the mounting body (2) are arranged in multiple intervals; the mounting body (2) includes two side plates (201) arranged opposite to each other on the inner sidewall of the U-shaped track beam (1), the multiple air holes (3) are respectively opened on the two side plates (201), and a sealing shell (202) is fastened to the outer side of the two side plates (201). The two side plates (201), the sealing shell (202) and the inner sidewall of the U-shaped track beam (1) together form the inner cavity (4); a connecting rib (203) is provided between the two side plates (201), and the connecting rib (203) is located in the inner cavity (4); the length direction of the side plate (201) is perpendicular to the extension direction of the U-shaped track beam (1); the multiple air holes (3) on the two side plates (201) are respectively arranged one-to-one.

2. The noise reduction device for superconducting high-speed maglev tracks according to claim 1, characterized in that, The two inner walls of the U-shaped track beam (1) are each equipped with multiple noise reduction units.

3. The noise reduction device for superconducting high-speed maglev tracks according to claim 2, characterized in that, Multiple noise reduction units on the two inner sidewalls of the U-shaped track beam (1) are symmetrically arranged based on the centerline of the length direction of the U-shaped track beam (1).

4. The noise reduction device for superconducting high-speed maglev tracks according to claim 1, characterized in that, The air hole (3) is rectangular in shape, and the inner wall of one side of the air hole (3) coincides with the inner wall of the corresponding side of the U-shaped track beam (1).

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