CN111976754A - Double-deck windage arresting gear, double-deck cab structure and high-speed train - Google Patents

Abstract

The invention discloses a double-layer wind resistance braking device, a double-layer driver's cab structure and a high-speed train. The double-layer wind resistance braking device comprises an outer-layer wind-resistance braking plate and an inner-layer wind-resistance braking plate installed in the variable-section area of the train. The outer layer wind resistance braking plate includes a plurality of outer layer braking unit plates arranged laterally along the outer contour of the variable section area, and the inner layer wind resistance braking plate includes a plurality of inner layer braking unit plates arranged laterally along the outer contour of the variable section area, The opening and closing drive mechanism is installed on the cab of the high-speed train. When the outer wind resistance brake plate and the inner wind resistance brake plate are opened, the inner layer brake unit plate is located inside the outer layer brake unit plate and is located in the adjacent outer layer brake plate in the cell board gap. The double-layer wind resistance braking device, the double-layer driver's cab structure and the high-speed train have simple structure, convenient installation and high reliability, can meet the demand for braking force in the emergency braking state of the high-speed train, and solve the problem of the high-speed train in emergency braking. The problem of lack of power.

Description

A double-layer wind resistance braking device, double-layer driver's cab structure and high-speed train

technical field

The invention relates to the technical field of rail transit equipment, in particular to a double-layer wind resistance braking device, a double-layer cab structure and a high-speed train.

Background technique

When the speed of a traditional train in my country is 120km/h, the air resistance accounts for about 40% of the total resistance; the speed-up train composed of a blunt locomotive pulling a speed-up passenger car (the bottom of the vehicle is exposed), the air resistance accounts for about 75% of the total resistance at a speed of 160km/h; At 300km/h, the air resistance accounts for about 85% of the total resistance. The air resistance of the train is proportional to the square of the running speed of the train. With the increase of the running speed of the train, the air resistance of the train increases rapidly, and the proportion of the air resistance of the train to the total resistance is also increasing.

When the running speed of the high-speed train is increased from 300km/h to 350km/h, the kinetic energy of the train increases by more than 40%, and the energy consumed by train braking also increases by more than 40%. The traditional train braking method is tread braking, disc braking or regenerative braking that relies on the adhesion between the wheel and rail. For high-speed trains running at a speed of 350km/h and above, the adhesion coefficient between the wheel and rail varies with the speed of the train. As the speed of high-speed trains increases, it decreases, that is, when the train brakes at a speed of 350km/h, its braking distance will be greatly extended, and the train cannot stop within the traditional braking distance of 350km/h.

Traditional braking forms can no longer meet the needs of high-speed train braking under emergency conditions such as earthquakes or train collisions. The braking technology of high-speed trains is very important for the safe operation of trains. In the event of earthquakes or train collisions, the shorter the emergency braking distance of high-speed trains, the safer the high-speed trains, and the higher the safety factor for passengers. Therefore, it is necessary to develop a new type of braking device to meet the braking force demand of high-speed trains in emergency braking state.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a double-layer wind resistance braking device, a double-layer driver's cab structure and a high-speed train. It meets the demand for braking force in the emergency braking state of high-speed trains, and solves the problem of insufficient braking force during emergency braking of high-speed trains.

In order to achieve the above purpose, the present invention provides a double-layer wind resistance braking device, comprising an outer wind resistance brake plate and an inner layer wind resistance brake plate installed in the variable cross-section area of a high-speed train cab, and an outer wind resistance brake plate. It includes a plurality of outer brake unit plates arranged laterally along the outer contour of the variable section area, and the inner wind resistance brake plate includes a plurality of inner brake unit plates arranged laterally along the outer contour of the variable section area, and is installed on the cab of a high-speed train There is an opening and closing drive mechanism for independently closing or opening the outer brake unit plate and the inner brake unit plate. When the outer wind resistance brake plate and the inner wind resistance brake plate are opened, the inner brake unit plate is located on the outer layer. The inner side of the brake unit plate is located in the gap between the adjacent outer brake unit plates. When the outer layer wind resistance brake plate and the inner layer wind resistance brake plate are folded, the inner layer brake unit plate is located in the outer layer brake unit plate. below.

Further, each row of outer wind resistance brake plates and a row of inner layer wind resistance brake plates form a set of double-layer wind resistance brake units, and the variable cross-section area of the high-speed train cab is provided with multiple sets of double-layer wind resistance brake units. A group of double-layer wind resistance braking units are arranged side by side in the variable section area of the high-speed train driver's cab along the length direction of the high-speed train driver's cab.

Further, when the outer brake unit plate is folded, it is consistent with the flow line of the variable cross-section area of the high-speed train cab; when the outer brake unit plate and the inner brake unit plate are opened, the length direction of the high-speed train cab is 60°. The included angle is -90°, and the outer brake unit plate and the inner brake unit plate are inclined upward toward the side of the nose cone of the high-speed train.

Further, each outer brake unit plate and each inner brake unit plate are connected with a U-shaped transmission arm, and the other end of the U-shaped transmission arm is connected with the rotating shaft of the opening and closing drive mechanism.

Further, the upper edge of the high-speed train driver's cab is laterally provided with a stepped groove on the outer contour of the variable cross-section area, and the outer braking unit plate and the inner braking unit plate are both installed at the upper edge of the side wall of the stepped groove; When the outer brake unit plate and the inner brake unit plate are folded, they are accommodated in the stepped groove.

Further, the opening and closing driving mechanism is a motor, and the opening and closing driving mechanism is installed in the installation groove at the upper edge of the side wall of the stepped groove; the inner side of the outer brake unit plate and the inner layer of the brake unit plate are provided with a plurality of Ribs.

Further, a stepped boss is laterally provided on the bottom surface of the stepped groove along the contour of the variable cross-section area of the high-speed train cab, and the bottom surface of the stepped groove is stepped downward toward the nose cone of the high-speed train.

According to another aspect of the present invention, a double-layer cab structure for a high-speed train is provided, comprising a driver's cab body, the above-mentioned double-layer wind resistance braking device is installed in a variable section area of the driver's cab body, and the driver's cab body includes a driver's cab layer Steel structure, the steel structure of the cab is a bluff steel structure, the front end of the steel structure of the cab is provided with a stepped groove frame and a stepped boss skeleton, and the outer side of the steel structure of the cab is equipped with a bluff sealing skin. The streamlined sealing skin is covered on the stepped groove frame to form a stepped groove, and the bluff sealing skin is covered on the stepped boss frame to form a stepped boss.

Further, the driver's cab body also includes a driver's cab layer steel structure, the driver's cab layer steel structure is a streamlined steel structure, the driver's cab layer steel structure is installed on the outside of the bluff sealing skin, and the bluff sealing Place the cell board placement holes for the outer brake cell board and the inner brake cell board.

According to another aspect of the present invention, a high-speed train is provided, comprising a leading car, an intermediate car and a trailing car, and the leading car and the trailing car are both equipped with the above-mentioned double-layer wind resistance braking device or the above-mentioned high-speed train dual Floor cab structure.

By applying the technical solution of the present invention, the outer wind resistance brake plate and the inner wind resistance brake plate are arranged laterally along the outer contour of the variable cross-section area in the variable-section area of the high-speed train driver's cab; The brake unit plate of the layer and the brake unit plate of the inner layer; when the windage brake plate of the outer layer and the brake plate of the inner layer are opened, the brake unit plate of the inner layer is located on the inner side of the brake unit plate of the outer layer and is adjacent to the brake unit plate of the outer layer. In order to further improve the aerodynamic resistance generated by the wind resistance brake device; when the outer wind resistance brake plate and the inner wind resistance brake plate are folded, the inner layer brake unit plate is located in the outer layer of the brake unit. The double-layer wind resistance braking device has the advantages of simple structure, convenient installation and high reliability, which can meet the demand for braking force in the emergency braking state of high-speed trains, and solve the problem of insufficient braking force during emergency braking of high-speed trains. question.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a schematic structural diagram of the double-layer wind resistance braking device of the present invention when it is opened.

FIG. 2 is a schematic structural diagram of the double-layer wind resistance braking device of the present invention when it is folded.

FIG. 3 is a schematic structural diagram of the upper layer steel structure of the driver's cab in the double-layer driver's cab structure of the present invention.

4 is a schematic structural diagram of a bluff sealing skin in the double-layer cab structure of the present invention.

FIG. 5 is a schematic structural diagram of the steel structure of the driver's cab in the double-layer driver's cab structure of the present invention.

FIG. 6 is a schematic structural diagram of the high-speed train of the present invention.

Wherein, the above-mentioned drawings include the following reference signs:

1. Outer layer wind resistance brake plate; 2, Inner layer wind resistance brake plate; 3, Opening and closing drive mechanism; 4, U-shaped transmission arm; 11, Outer layer brake unit plate; 21, Inner layer brake unit plate; 30, cab body; 31, nose cone; 32, stepped groove; 33, cab layer steel structure; 34, bluff sealing skin; 35, cab layer steel structure; 100, lead car; 200, middle car; 300, tail car; 323, stepped boss; 331, stepped groove frame; 332, stepped boss frame; 351, unit plate placement hole.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

Unless otherwise defined, all technical terms used hereinafter have the same meaning as commonly understood by those skilled in the art. Words like "a" or "an" used in the description of the patent application and the claims of the present invention do not indicate a quantitative limitation, but indicate that there is at least one. Words like "connected" or "connected" are not limited to direct connections, but indirect connections may be made through other intermediate connections. "Up", "Down", "Left", "Right", etc. are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

Referring to FIGS. 1 to 5 , a double-layer wind resistance braking device according to an embodiment of the present invention mainly includes an outer layer wind resistance brake plate 1 and an inner layer wind resistance brake plate 1 installed in the variable cross-section area of the cab of a high-speed train. Layer wind resistance brake plate 2. Wherein, the outer layer wind resistance braking plate 1 includes a plurality of outer layer braking unit plates 11 arranged laterally along the outer contour of the variable cross section area; the inner layer wind resistance braking plate 2 includes a plurality of inner layer layers arranged laterally along the outer contour of the variable cross section area Brake unit plate 21; an opening and closing drive mechanism 3 for independently closing or opening the outer layer brake unit plate 11 and the inner layer brake unit plate 21 is installed on the high-speed train driver's cab; and when the outer layer wind resistance When the brake plate 1 and the inner layer wind resistance brake plate 2 are opened, the inner layer brake unit plate 21 is located on the inner side of the outer layer brake unit plate 11 and is located in the gap between the adjacent outer layer brake unit plates 11; When the outer layer wind resistance braking plate 1 and the inner layer wind resistance braking plate 2 are folded, the inner layer braking unit plate 21 is located below the outer layer braking unit plate 11 .

The above-mentioned double-layer wind resistance braking device, through the outer layer wind resistance brake plate 1 and the inner layer wind resistance brake plate 2 arranged laterally along the outer contour of the variable cross-section area in the variable section area of the high-speed train driver's cab; through the opening and closing drive mechanism 3 Independently fold or open the outer brake unit plate 11 and the inner brake unit plate 21; when the outer wind resistance brake plate 1 and the inner wind resistance brake plate 2 are opened, the inner brake unit plate 21 is located on the outer layer The inner side of the brake unit plate 11 is located in the gap between the adjacent outer layer brake unit plates 11 to further improve the aerodynamic resistance generated by the wind resistance braking device; when the outer layer wind resistance brake plate 1 and the inner layer wind resistance brake plate 1 2. When folded, the inner braking unit plate 21 is located below the outer braking unit plate 11; the double-layer wind resistance braking device is simple in structure, convenient in installation, and high in reliability, and can meet the requirements of braking under emergency braking of high-speed trains. The demand for power solves the problem of insufficient braking force for high-speed trains during emergency braking.

Specifically, referring to FIG. 1 and FIG. 2 , in this embodiment, each row of outer wind resistance brake plates 1 and a row of inner layer wind resistance brake plates 2 form a set of double-layer wind resistance brake units; The variable cross-section area is provided with multiple groups of the double-layer wind resistance braking units; and, multiple groups of the double-layer wind resistance braking units are arranged side by side in the variable cross-section area of the high-speed train cab along the length direction of the high-speed train cab. With this arrangement, the overall aerodynamic resistance generated by the double-layer wind resistance braking device can be further improved, and the braking force of the high-speed train in the emergency braking state can be further improved.

In this embodiment, when the outer brake unit plate 11 is folded, it is consistent with the flow line of the variable cross-section area of the high-speed train driver's cab; in this way, when the high-speed train is running normally, the outer brake unit plate 11 is folded and closed, and the outer layer is closed. As part of the cab, the brake unit plate 11 is integrated with the streamlined shape of the cab and does not generate additional aerodynamic resistance. When the outer brake unit plate 11 and the inner brake unit plate 21 are opened, they form an angle of 60°-90° with the length direction of the high-speed train cab, and the outer brake unit plate 11 and the inner brake unit plate 21 is inclined upward toward the side of the nose cone 31 of the high-speed train. In this way, during the emergency braking of the high-speed train, the outer brake unit plate 11 is rapidly opened under the driving of the opening and closing drive mechanism 3, and at the same time, the streamlined shape structure of the cab of the train changes. , The outer brake unit plate 11 and the inner brake unit plate 21 generate air pressure differential resistance and air friction resistance, and rapidly increase the braking force of the high-speed train.

Specifically, in this embodiment, each outer brake unit plate 11 and each inner brake unit plate 21 are connected to a U-shaped transmission arm 4, and the other end of the U-shaped transmission arm 4 is connected to the opening It is connected with the rotating shaft of the drive mechanism 3 . Through the rotation of the rotating shaft of the opening and closing drive mechanism 3, the U-shaped transmission arm 4 is driven to swing, thereby driving each of the outer brake unit plates 11 and the inner brake unit plates 21 to independently fold or open.

Referring to FIG. 1 , in this embodiment, a stepped groove 32 is laterally provided along the outer contour of the variable-section area on the upper part of the cab of the high-speed train, and the outer brake unit plate 11 and the inner brake unit plate 21 are both installed on the The upper edge of the side wall of the stepped groove 32 is accommodated in the stepped groove 32 when the outer braking unit plate 11 and the inner braking unit plate 21 are folded. In this way, the stepped groove 32 on the variable cross-section area of the high-speed train cab can be used to increase the windward area of the cab on the one hand. On the other hand, it can provide installation space for the opening and closing drive mechanism 3 of the outer braking unit plate 11 and the inner braking unit plate 21, so that the outer braking unit plate 11, The inner layer brake unit plate 21 and the opening and closing drive mechanism 3 are well integrated with the train, and maintain the streamline shape of the train under normal operating conditions.

Specifically, in this embodiment, the opening and closing driving mechanism 3 is a motor, and the opening and closing driving mechanism 3 is installed in the installation groove at the upper edge of the side wall of the stepped groove 32 . When emergency braking is required in case of emergency, the double-layer wind resistance braking device can be quickly opened automatically or manually by the motor; when the danger is over, the double-layer wind resistance braking device can be restored to its original state through the control system. A plurality of reinforcing ribs are arranged on the inner side of the outer braking unit plate 11 and the inner braking unit plate 21 to improve the structural strength of the outer braking unit plate 11 and the inner braking unit plate 21 .

In this embodiment, a stepped boss 323 is laterally provided on the bottom surface of the stepped groove 32 along the contour of the variable cross-section area of the high-speed train cab. Ring-shaped, so that the bottom surface of the stepped groove 32 is stepped toward the nose cone 31 of the high-speed train. This arrangement can further increase the aerodynamic resistance of the train driver's cab, thereby improving the wind resistance braking effect.

Referring to FIGS. 1 to 5 , a double-deck cab structure for a high-speed train according to an embodiment of the present invention, the high-speed train double-deck cab structure includes a cab body 30 . The double-layer wind resistance braking device. The driver's cab body 30 includes a driver's cab layer steel structure 33, the driver's cab layer steel structure 33 is a bluff steel structure, and a stepped groove frame 331 and a stepped boss frame 332 are provided at the front end of the driver's cab layer steel structure 33; A bluff type sealing skin 34 is installed on the outer side of the upper steel structure 33 in the cab, the bluff type sealing skin 34 is covered on the stepped groove frame 331 to form the stepped groove 32, and the bluff type sealing skin 34 is covered with It is provided on the stepped boss frame 332 to form the stepped boss 323 . In this way, the upper steel structure 33 of the driver's cab is designed as a bluff steel structure, and a bluff sealing skin 34 is covered on the stepped groove frame 331 and the stepped boss frame 332 of the upper steel structure 33 of the driver's cab to form a step The shaped groove 32 and the stepped boss 323 facilitate the installation of the outer brake unit plate 11, the inner brake unit plate 21 and the opening and closing drive mechanism 3, and improve the wind resistance braking effect of the high-speed train cab structure. By covering the outer side of the upper steel structure 33 in the driver's cab with a layer of bluff sealing skin 34, the vehicle body can be kept sealed.

Further, referring to FIG. 5, in this embodiment, the driver's cab body 30 further includes a driver's cab layer steel structure 35, the driver's cab layer steel structure 35 is a streamlined steel structure; the driver's cab layer steel structure 35 is installed in a bluff type On the outer side of the sealing skin 34 , the bluff sealing skin 34 is further provided with unit plate placement holes 351 for placing the outer braking unit plate 11 and the inner braking unit plate 21 . The unit plate placement hole 351 corresponds to the position of the stepped groove 32, and corresponds to the position of the outer brake unit plate 11 and the inner brake unit plate 21. The outer wind resistance brake plate 1 and the inner wind resistance brake When the plate 2 is folded, the outer brake unit plate 11 and the inner brake unit plate 21 are placed in the unit plate placement hole 351, so that the outer brake unit plate 11 and the driver's cab layer steel structure 35 are in line with each other.

Referring to FIG. 6 , a high-speed train using the double-layer wind resistance braking device or double-layer cab structure of the present invention includes a head car 100 , a middle car 200 and a tail car 300 , the head car 100 and the middle car 200 The other end of the middle car 200 is connected with the tail car 300; the double-layer wind resistance braking device or the double-layer cab structure of the above-mentioned embodiment of the present invention is provided on both the lead car 100 and the tail car 300.

The above-mentioned high-speed train, by setting the double-layer wind resistance braking device or the double-layer cab structure of the present invention on the head car 100 and the tail car 300 of the high-speed train, because the speed of the flow in front of the cab variable-section area is faster, it produces The aerodynamic resistance is greater than the aerodynamic resistance provided by the wind resistance braking device installed in other parts of the body; when the high-speed train is running normally, the outer wind resistance brake plate 1 and the inner wind resistance brake plate 2 are folded and closed, and the head and tail trains are closed. The streamlined shape of the cab structure forms a whole, which will not increase the cross-sectional area of the train and will not generate additional aerodynamic resistance; when the high-speed train is braked urgently, the outer wind resistance brake plate 1 on the cab structure of the head and tail trains And the inner wind resistance brake plate 2 is quickly opened, which is equivalent to changing the streamlined structure of the head and tail vehicles. The outer wind resistance brake plate 1 and the inner wind resistance brake plate 2 generate air pressure differential resistance and air friction resistance to provide Larger train braking force; at the same time, after the outer wind resistance brake plate 1 and the inner wind resistance brake plate 2 are opened, the streamlined structure of the train head is transformed into the internal cab steel structure, and the bluff internal cab structure will also increase Air resistance, thereby further improving the wind resistance braking effect.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The double-layer wind resistance braking device is characterized by comprising an outer layer wind resistance braking plate (1) and an inner layer wind resistance braking plate (2) which are arranged in a variable cross section area of a high-speed train cab, wherein the outer layer wind resistance braking plate (1) comprises a plurality of outer layer braking unit plates (11) which are transversely arranged along the outer contour of the variable cross section area, the inner layer wind resistance braking plate (2) comprises a plurality of inner layer braking unit plates (21) which are transversely arranged along the outer contour of the variable cross section area, an opening and closing driving mechanism (3) which is used for independently drawing or opening the outer layer braking unit plates (11) and the inner layer braking unit plates (21) is arranged on the high-speed train cab, when the outer layer wind resistance braking plate (1) and the inner layer wind resistance braking plate (2) are opened, the inner layer braking unit plates (21) are positioned on the inner sides of the outer layer braking unit plates (11) and in gaps between the adjacent outer layer braking unit plates (11), when the outer layer wind resistance brake plate (1) and the inner layer wind resistance brake plate (2) are folded, the inner layer brake unit plate (21) is positioned below the outer layer brake unit plate (11).

2. The double-layer wind resistance brake device according to claim 1, wherein each row of the outer layer wind resistance brake plate (1) and each row of the inner layer wind resistance brake plate (2) form a group of double-layer wind resistance brake units, a plurality of groups of double-layer wind resistance brake units are arranged in a variable cross-section area of the high-speed train cab, and the groups of double-layer wind resistance brake units are arranged in the variable cross-section area of the high-speed train cab side by side along the length direction of the high-speed train cab.

3. The double-layer wind resistance brake device according to claim 1, wherein the outer layer brake unit plate (11) is in the same streamline with the variable cross-section area of the high-speed train cab when folded; when the outer layer brake unit plate (11) and the inner layer brake unit plate (21) are opened, an included angle of 60-90 degrees is formed between the outer layer brake unit plate and the length direction of the cab of the high-speed train, and the outer layer brake unit plate (11) and the inner layer brake unit plate (21) incline upwards towards one side of a nose cone (31) of the high-speed train.

4. The double-layer wind resistance brake device according to claim 1, wherein each outer brake unit plate (11) and each inner brake unit plate (21) are connected with a U-shaped transmission arm (4), and the other end of the U-shaped transmission arm (4) is connected with a rotating shaft of the opening and closing driving mechanism (3).

5. The double-layer wind resistance brake device according to any one of claims 1-4, wherein a stepped groove (32) is transversely arranged on the outer contour of the variable cross-section area of the upper edge of the high-speed train cab, and the outer brake unit plate (11) and the inner brake unit plate (21) are both arranged on the upper edge of the side wall of the stepped groove (32); the outer layer brake unit plate (11) and the inner layer brake unit plate (21) are accommodated in the stepped groove (32) when being folded.

6. The double-layer wind resistance brake device according to claim 5, characterized in that the opening and closing driving mechanism (3) is a motor, and the opening and closing driving mechanism (3) is installed in an installation groove at the upper edge of the side wall of the stepped groove (32); the inner sides of the outer layer brake unit plate (11) and the inner layer brake unit plate (21) are provided with a plurality of reinforcing ribs.

7. The double-layer wind resistance brake device according to claim 5, characterized in that a step boss (323) is transversely arranged on the bottom surface of the stepped groove (32) along the contour of the variable cross-section area of the cab of the high-speed train, and the bottom surface of the stepped groove (32) is in a step shape which is reduced towards the nose cone (31) of the high-speed train.

8. A double-layer cab structure of a high-speed train comprises a cab body (30) and is characterized in that, the variable cross-section area of the cab body (30) is provided with the double-layer wind resistance braking device as claimed in any one of claims 1-7, the cab body (30) comprises a cab inner steel structure (33), the cab inner steel structure (33) is a non-streamline steel structure, the front end of the inner steel structure (33) of the cab is provided with a step-shaped groove framework (331) and a step-shaped boss framework (332), a non-streamlined sealing skin (34) is arranged on the outer side of the cab inner layer steel structure (33), the non-streamlined sealing skin (34) is covered on the stepped groove framework (331) to form a stepped groove (32), the non-streamlined sealing skin (34) is covered on the stepped boss framework (332) to form a stepped boss (323).

9. The double-deck cab structure of the high-speed train as claimed in claim 8, wherein the cab body (30) further comprises an outer steel structure (35) of the cab, the outer steel structure (35) of the cab is a streamline steel structure, the outer steel structure (35) of the cab is installed outside the non-streamline sealing skin (34), and the non-streamline sealing skin (34) is provided with unit plate placing holes (351) for placing the outer braking unit plates (11) and the inner braking unit plates (21).

10. A high-speed train comprising a head car (100), a middle car (200) and a tail car (300), wherein the head car (100) and the tail car (300) are both provided with the double-layer wind resistance braking device according to any one of claims 1-7 or the double-layer cab structure of the high-speed train according to claim 8 or 9.

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