Full-wrapping type multifunctional outer windshield for high-speed train

Abstract

The invention relates to the technical field of train workshop accessories, and discloses a high-speed train full-wrapping type multifunctional outer windshield which comprises a full-wrapping air bag, the full-wrapping air bag is in a rectangular frame shape matched with the shape of a train compartment, an annular air bag space is formed in the full-wrapping air bag, and a plurality of isolation pieces are further arranged in the full-wrapping air bag. The air bag space is divided into a plurality of cavities by the plurality of isolation pieces, the plurality of cavities are sequentially arranged along the circumferential direction of the full-wrapping air bag, damping holes are formed in the isolation pieces, and the two ends of the damping holes are respectively communicated with the cavities on the two sides of the isolation pieces where the damping holes are located; the multifunctional outer windshield adopts a form of fully wrapping the air bag, has the functions of sound insulation, resistance reduction and rain and snow resistance, is provided with the damping holes, has rigidity and damping characteristics after the air bag is filled with compressed air, can buffer the impact between vehicles, reduces the application of shock absorbers in a workshop, and improves the service life of the vehicle. And intelligent control over linear high air pressure and curve low air pressure can be achieved through the control valves, and better dynamic performance of the train is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of train workshop accessories, in particular to a fully inclusive multifunctional outer windshield for a high-speed train. Background Art

[0002] With the advancement of EMU technology and the increase in running speed, passengers have higher and higher demands for riding comfort. However, the increase in running speed has aggravated a series of vibration problems such as body shaking and rolling, which seriously affects the running quality of the train. Studies have shown that the stiffness and damping characteristics of the car-end connection device have a significant restraining effect on the vibration of the car body, which in turn affects the dynamic performance of the train operation.

[0003] The traditional train vehicle-end connection system adopts a functional-structural differentiation architecture, which mainly includes a coupler buffer device and a windshield device, resulting in a complex structure and overlapping functions, which is in stark contrast to the future high-speed train's requirements for lightweight, easy operation, and high accessibility. In the past, most of my country's railway vehicles used iron windshields, but there were many problems in the application process, such as high noise and poor air tightness. Later, after the railway vehicle speed was increased, rubber windshields were used, which have good longitudinal scalability and lateral and vertical flexibility to adapt to the vehicle passing through curves and reduce vibration. However, with the increase in speed, the air tightness of the windshield has become increasingly prominent, and its drag reduction effect is limited. For this reason, the current high-speed trains mostly use a fully enclosed bellows outer windshield structure. Due to the insufficient stiffness and damping provided by the fully enclosed bellows windshield, my country's high-speed trains such as Fuxinghao CR400AF and CR400BF are equipped with workshop shock absorbers to strengthen the coupling between the front and rear vehicles in the train. However, there are still some disadvantages in installing longitudinal shock absorbers on the vehicle side, such as high cost, large size, and increased mass of the vehicle suspension device; if the number of longitudinal shock absorbers installed is insufficient, there will be no obvious effect on improving the train dynamics; and the oil is easy to leak during operation, which will cause corrosion and pollution of vehicle-side equipment and line facilities; at the same time, in order to reduce the aerodynamic resistance during operation, the high-speed train has an all-inclusive design of the outer windshield structure, which limits the installation space of the longitudinal shock absorber; the most important point is that the vehicle is equipped with a vehicle shock absorber to strengthen the coupling effect between vehicles. Although it can effectively improve the stability and straight-line stability of the train, it is not conducive to the vehicle passing through curves, especially in small-radius curves, which will significantly increase wheel wear and seriously deteriorate the vehicle's curve passing performance.

[0004] Based on the above reasons, we have developed a multifunctional outer windshield connection mechanism for high-speed train workshops (Chinese invention patent application, application number CN202410265334.5), which not only has the functions of sound insulation and drag reduction of traditional outer windshields, and resistance to rain and snow, but also has stiffness and damping characteristics. It can completely or partially replace the workshop shock absorber, can alleviate the impact between vehicles, and effectively suppress the vibration of the vehicle body, thereby improving the stability of train operation. At the same time, it can reduce the weight of the vehicle-end connection system, shorten the time spent on installing or removing the workshop shock absorber when the vehicle is coupled or disassembled, and save the vehicle-end space occupied by the workshop shock absorber.

[0005] However, the outer windshield connection mechanism includes two front and rear windshield devices, which are similar to a capsule structure when connected. It is necessary to rely on pre-compression (pressing the two windshield devices tightly) to achieve connection. When in use, the outer airbags of the two windshield devices are only pre-compressed and pressed tightly but not tightly connected. During operation: on the one hand, there is a large gap and recess between the two outer airbags, which will be impacted by the airflow and produce a large aerodynamic resistance and pressure pulsation, affecting its sound insulation, drag reduction, sealing and other performances; on the other hand, with the turning, bumping and other situations during the operation of the train, there is a certain relative displacement and wear at the contact part of the two outer airbags, and the service life of the outer windshield is limited. In order to ensure the reliability during operation as much as possible, the windshield device needs to adopt the structural form of inner and outer double-layer airbags and design a corresponding air replenishment control system. Its overall structure and manufacturing process are relatively complicated, and it is not conducive to lightweight design. At the same time, from the perspective of vehicle dynamics, the outer windshield is a passive vibration reduction device with fixed dynamic performance parameters, which cannot be automatically adjusted according to line conditions, that is, it cannot take into account the vehicle's linear dynamics performance and curve passing performance, and the comprehensive dynamics performance of the train cannot reach the best. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a fully enclosed multifunctional outer windshield for high-speed trains, which has the functions of sound insulation and drag reduction, and resistance to rain and snow, and has stiffness and damping characteristics, can alleviate the impact between vehicles, reduce the application of workshop shock absorbers, reduce the weight of the vehicle-end connection system, and save the vehicle-end space occupied by the workshop shock absorbers. At the same time, it can realize automatic adjustment of the air pressure in the airbag according to the line type, taking into account the vehicle's linear dynamics performance and curve passing performance.

[0007] The objective of the present invention is achieved through the following technical solutions: A fully-enclosed multifunctional outer windshield for a high-speed train, comprising a fully-enclosed airbag, the fully-enclosed airbag being in a rectangular frame shape adapted to the shape of a train compartment, the fully-enclosed airbag comprising an inner surface, an outer surface and two end surfaces, the outer surface being sleeved outside the inner surface, the two ends of the inner surface being respectively connected to the two end surfaces, the two ends of the outer surface being respectively connected to the two end surfaces, and an airbag space being formed between the inner surface and the outer surface; A plurality of isolation plates are also arranged between the inner layer and the outer layer, and the isolation plates separate the airbag space into a plurality of cavities. The plurality of cavities are arranged in sequence along the circumference of the full-enclosed airbag. Damping holes are opened on the isolation plates, and the two ends of the damping holes are respectively connected to the cavities on both sides of the isolation plates.

[0008] Specifically, the isolation sheet includes a flexible sheet and a rigid sheet. The four sides of the flexible sheet are tightly connected to the inner layer, the outer layer and the two end faces respectively. A mounting hole is opened in the middle of the flexible sheet. The rigid sheet is arranged in the mounting hole. The four sides of the rigid sheet are tightly connected to the flexible sheet. The damping hole is opened on the rigid sheet.

[0009] Specifically, the flexible sheet is made of rubber material.

[0010] Specifically, the flexible sheet is arranged obliquely to the two end surfaces, and two adjacent flexible sheets are arranged in an eight-shaped or triangle shape.

[0011] Furthermore, a plurality of detection and air-supplementing holes are provided on the inner surface, and the plurality of detection and air-supplementing holes are respectively used to connect the plurality of cavities with the outside.

[0012] Specifically, the detection air-supply hole is arranged in a middle area between ends of two adjacent flexible sheets that are away from each other.

[0013] Furthermore, it also includes an air supply pipeline, and a plurality of the detection air supply holes are connected to the air supply pipeline through a control valve.

[0014] Furthermore, the control valve can be switched between three modes: closing the detection air supply hole, connecting the detection air supply hole with the outside, and connecting the detection air supply hole with the air supply pipeline.

[0015] The beneficial effects of the present invention are: The high-speed train fully-enclosed multifunctional outer windshield includes a fully-enclosed airbag, which is in a rectangular frame shape that matches the shape of the train car. An annular airbag space is formed in the fully-enclosed airbag. A plurality of isolation plates are also arranged in the fully-enclosed airbag. The isolation plates separate the airbag space into a plurality of cavities, and the plurality of cavities are arranged in sequence along the circumference of the fully-enclosed airbag. Damping holes are opened on the isolation plates, and the two ends of the damping holes are respectively connected to the cavities on both sides of the isolation plates where they are located. At the same time, detection air supply holes and control valves are arranged. When a vehicle using the all-inclusive multifunctional outer windshield experiences nodding vibration or shaking head vibration, there is a tendency for gas to flow through a number of damping holes in the airbag space. The damping force generated when the gas flows through the damping holes can effectively attenuate and suppress the vibration of the vehicle body, alleviate the impact between vehicles, reduce the application of workshop shock absorbers, reduce the weight of the vehicle-end connection system, and save the vehicle-end space occupied by the workshop shock absorbers. The all-inclusive structure is adopted to smoothly connect the front and rear vehicles into a whole, and the airflow will not be greatly impacted when passing through the windshield. It has better sound insulation, drag reduction and sealing performance. At the same time, it has a simple structure and a longer service life. At the same time, it solves the contradiction between the passive multifunctional outer windshield in the vehicle dynamics performance, can take into account the vehicle's linear dynamics performance and curve passing performance, so that the comprehensive dynamics performance of the train is optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the external structure of a fully-enclosed multifunctional outer windshield for a high-speed train according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a fully enclosed multifunctional outer windshield for a high-speed train according to the present invention; In the figure, 1-outer surface, 2-inner surface, 3-end surface, 4-installation strip, 5-flexible sheet, 6-rigid sheet, 7-detection air supply hole, 8-air supply pipeline. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0018] like Figure 1 , Figure 2As shown, a fully-enclosed multifunctional outer windshield for a high-speed train includes a fully-enclosed airbag, which is in the shape of a rectangular frame that matches the shape of a train compartment when the pressure strip 4 is installed and tightened. In terms of specific structure, the fully-enclosed airbag includes an inner layer 2, an outer layer 1, and two end faces 3. The outer layer 1 is sleeved outside the inner layer 2, and the two ends of the inner layer 2 are respectively connected to the two end faces 3, and the two ends of the outer layer 1 are respectively connected to the two end faces 3, so that an annular airbag space is formed between the inner layer 2 and the outer layer 1 in the circumferential direction. A plurality of isolation plates are also arranged between the inner layer 2 and the outer layer 1, and the plurality of isolation plates separate the airbag space into a plurality of cavities, and the plurality of cavities are arranged in sequence along the circumference of the fully-enclosed airbag. A damping hole is provided on the isolation plate, and the two ends of the damping hole are respectively connected to the cavities on both sides of the isolation plate.

[0019] When in use, the fully enclosed airbag is connected to the ends of the two connected carriages through the mounting strips 4 and bolts at both ends. Inflating the airbag space forms a fully enclosed windshield structure, which has good sound insulation and drag reduction, and can resist rain and snow. At the same time, it has certain rigidity characteristics due to being filled with air. During the operation of the train, when the car body shakes or nods, one side of the car body bends inward locally, and the cavity located at this local position is directly compressed. For the convenience of description, the directly compressed cavity is named cavity No. 1, the adjacent cavities on both sides are named cavity No. 2, and the side of cavity No. 2 away from cavity No. 1 is named cavity No. 3. From the compression situation when bending occurs, cavity No. 1 is most compressed, followed by cavity No. 2, and then cavity No. 3 (it should be understood that the above naming is not limited to a single cavity, but is named according to the degree of compression). When bending occurs, the pressure in cavity No. 1, cavity No. 2, and cavity No. 3 increases to different values ​​due to different pressure levels, which can drive the airflow in cavity No. 1 to flow into cavity No. 2 through the damping hole, and the airflow in cavity No. 2 to flow into cavity No. 3 through the damping hole. Conversely, if there is stretching on the other side of the train, the tension conditions of the cavities on the other side of the train are different, which will also drive the airflow to flow through the damping hole. It can be seen that when the vehicle nods and shakes its head, there is a tendency for the gas to flow through several damping holes in the airbag space. The damping force generated when the gas flows through the damping holes can effectively attenuate and suppress the vibration of the vehicle body, alleviate the impact between vehicles, reduce the application of workshop shock absorbers, reduce the weight of the vehicle-end connection system, and save the vehicle-end space occupied by the workshop shock absorbers.

[0020] Compared with the original high-speed train workshop multifunctional external windshield connection mechanism (Chinese invention patent application, application number CN202410265334.5), the high-speed train fully-enclosed multifunctional external windshield adopts a fully-enclosed structure, and the front and rear vehicles are smoothly connected into a whole. The airflow will not be greatly impacted when passing through the windshield. It has better sound insulation, drag reduction and sealing performance. At the same time, it has a simple structure and a longer service life.

[0021] In specific implementation, the isolation sheet includes a flexible sheet 5 and a rigid sheet 6. The four sides of the flexible sheet 5 are tightly connected to the inner layer 2, the outer layer 1 and the two end faces 3, respectively. A mounting hole is provided in the middle of the flexible sheet 5. The rigid sheet 6 is arranged in the mounting hole. The four sides of the rigid sheet 6 are tightly connected to the flexible sheet 5, and the damping holes are provided on the rigid sheet 6. The flexible sheet 5 is arranged so that the four sides are tightly connected to the inner layer 2, the outer layer 1 and the two end faces 3, respectively, so that each cavity has good sealing properties around it, ensuring that the damping holes can play a role; the flexible sheet 5 is made of a flexible material, which has elasticity and ductility, and can be adaptively deformed when the vehicle body vibrates to avoid structural interference; the rigid sheet 6 is provided and the damping holes are provided on the rigid sheet 6 to ensure that the aperture of the damping holes is not affected or blocked, so that its damping properties can be played.

[0022] Specifically, the flexible sheet 5 is made of rubber material, and its deformation range is small, which is conducive to the damping hole to play a role, and its deformation force can assist vibration reduction to a certain extent. Further, the flexible sheet 5 is arranged obliquely to the two end surfaces, and two adjacent flexible sheets 5 are arranged in an eight-shaped or triangular shape to reduce the direct impact on the flexible sheet 5, so that the overall vibration reduction is mainly based on the damping characteristics of the damping hole.

[0023] Furthermore, a plurality of detection and air-supplement holes 7 are provided on the inner surface 2, and the plurality of detection and air-supplement holes 7 are respectively used to connect the plurality of cavities with the outside, and the air pressure of each cavity can be monitored by connecting a pressure gauge to the detection and air-supplement holes 7. In a specific implementation, the detection and air-supplement holes 7 are arranged in the middle area between the ends of two adjacent flexible sheets 5 that are away from each other, and are located away from the flexible sheets 5 to avoid being blocked due to deformation of the flexible sheets 5.

[0024] Furthermore, an air supply pipeline 8 is provided, and a plurality of air supply detection holes 7 are connected to the air supply pipeline 8 through control valves. When leakage occurs and abnormal air pressure is detected in the cavity, the train air compressor can supply air to each cavity through the air supply pipeline 8 under the control of each control valve.

[0025] It should also be noted that, according to research, when the vehicle is running on a straight line, the windshield has a relatively large compressed air pressure value, which makes it have a relatively high rigidity, which can ensure the good stability and straight-line stability of the vehicle; while when the vehicle is running on a curve, the windshield has a relatively small compressed air pressure value, which makes it have a relatively small rigidity, which is conducive to the vehicle passing through the curve. During implementation, the control valve can select a three-way control valve, which has three control modes: closing the detection air supply hole 7, connecting the detection air supply hole 7 with the outside world, and connecting the detection air supply hole 7 with the air supply pipeline 8. When the detection air supply hole 7 is connected with the outside world, the cavity can be deflated and depressurized, and when the detection air supply hole 7 is connected with the air supply pipeline 8, the cavity can be pressurized. Therefore, through the air supply pipeline 8 and the control valve, semi-active intelligent control of the air pressure of each cavity can be achieved, so that the multifunctional outer windshield has good line adaptability, so that the comprehensive dynamic performance of the vehicle is optimized.

[0026] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A fully inclusive multifunctional outer windshield for high-speed trains, characterized in that: The airbag comprises a fully enclosed airbag, which is in a rectangular frame shape adapted to the shape of a train compartment, and comprises an inner surface, an outer surface and two end surfaces, wherein the outer surface is sleeved outside the inner surface, two ends of the inner surface are respectively connected to the two end surfaces, and two ends of the outer surface are respectively connected to the two end surfaces, and an airbag space is formed between the inner surface and the outer surface; A plurality of isolation plates are also arranged between the inner layer and the outer layer, and the isolation plates separate the airbag space into a plurality of cavities. The plurality of cavities are arranged in sequence along the circumference of the full-enclosed airbag. Damping holes are opened on the isolation plates, and the two ends of the damping holes are respectively connected to the cavities on both sides of the isolation plates.

2. The all-inclusive multifunctional outer windshield for high-speed train according to claim 1, characterized in that: The isolation sheet includes a flexible sheet and a rigid sheet. The four sides of the flexible sheet are tightly connected to the inner layer, the outer layer and the two end faces respectively. A mounting hole is opened in the middle of the flexible sheet. The rigid sheet is arranged in the mounting hole. The four sides of the rigid sheet are tightly connected to the flexible sheet. The damping hole is opened on the rigid sheet.

3. The all-inclusive multifunctional outer windshield for high-speed train according to claim 2, characterized in that: The flexible sheet is made of rubber material.

4. The all-inclusive multifunctional outer windshield for high-speed train according to claim 3, characterized in that: The flexible sheet is arranged obliquely to the two end surfaces, and two adjacent flexible sheets are arranged in an eight-shaped or triangle shape.

5. The all-inclusive multifunctional outer windshield for high-speed trains according to claim 4, characterized in that: A plurality of detection and air-supplementing holes are provided on the inner surface, and the plurality of detection and air-supplementing holes are respectively used to connect the plurality of cavities with the outside.

6. The all-inclusive multifunctional outer windshield for high-speed train according to claim 5, characterized in that: The detection and air supply hole is arranged in the middle area between ends of two adjacent flexible sheets that are away from each other.

7. The all-inclusive multifunctional outer windshield for high-speed train according to claim 4, characterized in that: It also includes an air supply pipeline, and a plurality of the detection air supply holes are connected to the air supply pipeline through a control valve.

8. The all-inclusive multifunctional outer windshield for high-speed trains according to claim 7, characterized in that: The control valve can be switched between three modes: closing the detection air supply hole, connecting the detection air supply hole with the outside, and connecting the detection air supply hole with the air supply pipeline.

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