Gap device for high-speed rail resistance control

Abstract

The invention provides a seam device for high-speed rail resistance control. The seam device comprises a left seam and a right seam which are symmetrically arranged relative to the middle section of a train body. In addition, the left side seam and the right side seam are symmetrically arranged on the two side faces of the interior of the head area of the train head; the seam channel on each side comprises a seam channel inlet and a seam channel outlet; the seam entrance is formed in an area on one side of a nose tip of a high-speed train head; and the seam exit is arranged in a straight section area at the top of a train head. According to the gap device for high-speed rail resistance control, two symmetrical gap structures are designed in the head area of the head of a high-speed rail train according to the aerodynamics principle, the gap device can greatly increase the resistance of the train, the braking distance can be effectively reduced, the control mode is simple, and the gap device is suitable for large-scale popularization and application. The method is an effective resistance control mode, and the requirement for short-distance braking during high-speed running of the high-speed rail is met.

Description

Technical Field

[0001] The invention belongs to the technical field of aerodynamics, and in particular relates to a slot device for controlling resistance of a high-speed railway. Background Art

[0002] At present, the resistance control of high-speed trains mainly adopts pneumatic braking method, which improves the braking efficiency by increasing air resistance. A common method is to use an external wind resistance plate, which is arranged on the top or side of the high-speed train body. The structure is bulky and complex, and places extremely high requirements on the structure and strength. It increases the difficulty of controlling the train during operation and cannot meet the current needs of short-distance braking when the high-speed train is running at high speed. Summary of the invention

[0003] In view of the defects in the prior art, the present invention provides a high-speed rail resistance control slot device, which can effectively solve the above problems.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The present invention provides a slot device for high-speed rail resistance control, comprising a left slot and a right slot symmetrically arranged relative to a middle section of a train body; and the left slot and the right slot are symmetrically arranged on two side surfaces inside a head region of a train head; the slot on each side comprises a slot entrance and a slot exit; the slot entrance is arranged in a side region of a nose tip of a high-speed rail head; and the slot exit is arranged in a straight section region on the top of the train head;

[0006] When the train brakes, the slot entrances of the slots on both sides are opened, and the airflow is diverted through the slots on both sides and ejected from the slot exits; thereby increasing the pressure in the entrance area and forming a jet wall at the exit, causing partial separation of the airflow, thereby increasing the train resistance and assisting in achieving short-distance braking.

[0007] Preferably, for the right side seam in the forward direction of the train, it includes a seam entrance control section, a first seam middle control section sec1, a second seam middle control section sec2, a third seam middle control section sec3 and a seam exit control section formed in sequence from the entrance to the exit direction;

[0008] The coordinate system and related parameters are defined as follows: the nose of the train is taken as the coordinate origin, the x direction is defined as the length direction of the train body, and the positive direction is towards the rear of the train; the y direction is defined as the width direction of the train body, and the positive direction is towards the right side of the train's travel direction; the z direction is defined as the height direction of the train body, and the positive direction is upward; W represents the width of the train body;

[0009] (1) The shape and position of the control section at the slot entrance are described as follows:

[0010] ① On the side of the nose tip, determine the coordinates of the center point O1 as (x1, y1, z1); where x1 is 0.13W; y1 is 0.27W; z1 is 0.13W;

[0011] ② In the yoz plane, take the center point O1 as the center point of the ellipse, determine the major axis radius range to be 0.15W~0.25W, and the minor axis radius range to be 0.06W~0.15W, and form the first ellipse;

[0012] ③ Taking the positive direction of the x-axis as the viewing angle, rotate the first ellipse clockwise around the x-axis by 0° to 45° with the center point O1 to form the second ellipse;

[0013] ④The second ellipse is used to control the shape of the slot entrance. The elliptical plane where the second ellipse is located is the slot entrance control section;

[0014] The method for controlling the shape of the slot entrance is as follows: the interface where the cylinder formed by the second ellipse along the x-axis direction intersects with the surface of the train body is the slot entrance interface;

[0015] (2) The shape and position of the first slot middle control section sec1 are described as follows:

[0016] The second ellipse is translated and proportionally reduced to form the first seam middle control section sec1; the specific method is:

[0017] ① The second ellipse is translated so that its center point O1 is translated from the position of coordinates (x1, y1, z1) to the position of coordinates (x2, y2, z2), where x2 = x1 + Δx1, Δx1 = 0.07W to 0.67W; y2 = 0.27W; z2 = 0.13W; the position after translation (x2, y2, z2) is marked as the center point O2, and the translated second ellipse is represented as the third ellipse;

[0018] ② Reduce the third ellipse in proportion within a range of 70% to 95% to obtain the middle control section sec1 of the first seam;

[0019] (3) The shape and position of the second slot middle control section sec2 are described as follows:

[0020] ① Determine the coordinates of the center point O3 as (x3, y3, z3); ​​where x3 = x1 + Δx2, Δx2 = 0.77W to 1.77W; y3 = 0.35W; z3 = 0.15W;

[0021] ② In the yoz plane, take the center point O3 as the center point of the ellipse, determine the major axis radius range to be 0.12W~0.22W, and the minor axis radius range to be 0.05W~0.12W, to form the fourth ellipse;

[0022] ③ Taking the negative direction of the y-axis as the viewing angle, the fourth ellipse rotates 15° to 45° clockwise around the y-axis with the center point O3 to obtain the middle control section sec2 of the second seam;

[0023] (4) The shape and position of the third slot middle control section sec3 are described as follows:

[0024] ① Determine the coordinates of the center point O4 as (x4, y4, z4); where x4 = x1 + Δx3, Δx3 = 1.77W to 3.33W; y4 = 0.23W; z4 = z1 + Δz3, Δz3 = 0.07W to 0.67W;

[0025] ② In the xoy plane, take the center point O4 as the center point of the ellipse, determine the major axis radius range to be 0.06W~0.12W, and the minor axis radius range to be 0.01W~0.06W, to form the fifth ellipse;

[0026] ③ Taking the positive direction of the x-axis as the viewing angle, the fifth ellipse rotates -15° to 15° clockwise around the x-axis with the center point O4 to form the middle control section sec3 of the third seam;

[0027] (5) The shape and position of the control section at the slot outlet are described as follows:

[0028] The seam outlet is arranged in a range where the angle between the top plane of the roof behind the front windshield and the xoy plane is less than 10°, and its cross-sectional shape is a waist-shaped hole shape, parallel to the xoy plane, and the coordinates of the center point O5 are (x5, y5, z5); among which, x5 is 2.08W; y5 is 0.23W; z5 is 0.91W; its length range is 0.3W~0.45W, and its width range is 0.02W~0.1W, forming a seam outlet control section.

[0029] Preferably, a built-in movable curved plate is arranged at the slot entrance, and a built-in movable flat plate is arranged at the slot exit, which are used to close or open the slot entrance and the slot exit, respectively.

[0030] The high-speed rail resistance control slot device provided by the present invention has the following advantages:

[0031] The present invention provides a high-speed rail resistance control slot device, which utilizes aerodynamic principles to design two symmetrical slot configurations in the head area of ​​the high-speed rail train. The slot device designed in the present invention can greatly increase the resistance of the train and effectively reduce the braking distance. The control method is simple, and it is an effective resistance control method that meets the need for short-distance braking when the high-speed rail is traveling at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A diagram showing the arrangement of the left side seam and the right side seam provided by the present invention on a train body;

[0033] Figure 2 A structural diagram of the seam provided by the present invention;

[0034] Figure 3 A schematic diagram of the shape and arrangement position of the slot entrance control section provided by the present invention;

[0035] Figure 4 A schematic diagram of the shape and arrangement position of the first slot middle control section sec1 provided by the present invention;

[0036] Figure 5 A schematic diagram of the shape and arrangement position of the second slot middle control section sec2 provided by the present invention;

[0037] Figure 6 A schematic diagram of the shape and arrangement position of the third slot middle control section sec3 provided by the present invention;

[0038] Figure 7 A schematic diagram of the shape and arrangement position of the slot outlet control section provided by the present invention;

[0039] Figure 8 A schematic diagram of the present invention when the seams on both sides are closed;

[0040] Fig. 9 This is a schematic diagram of the two side seams provided by the present invention when they are opened.

[0041] in:

[0042] 1. Left side seam; 2. Right side seam;

[0043] A1, seam entrance control section; B, seam entrance interface;

[0044] A2, first seam middle control section sec1;

[0045] A3, the second seam middle control section sec2;

[0046] A4, the third seam middle control section sec3;

[0047] A5. Slot exit control section. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] Without affecting the normal running of high-speed trains, in order to solve the key problem of achieving short-distance braking when high-speed trains are running at high speeds, the present invention provides a slot device for controlling resistance of high-speed trains. The present invention taps the internal potential based on the existing appearance of high-speed trains, and uses aerodynamic principles to design two symmetrical slot configurations in the head area of ​​the high-speed train head, so that the airflow is diverted through the slot. This method can achieve a significant increase in pressure in the area near the slot entrance, and form a "jet wall" at the slot exit, causing local separation, thereby further achieving a significant increase in train resistance. When not needed, the slot entrance and exit can be blocked to achieve the "switch" effect of resistance control.

[0050] For details, see Figure 1 and Figure 2 The present invention provides a slot device for high-speed rail resistance control, comprising a left slot 1 and a right slot 2 symmetrically arranged relative to the middle section of a train body; and the left slot 1 and the right slot 2 are symmetrically arranged on two side surfaces inside the head area of ​​the train head; the slot on each side comprises a slot entrance and a slot exit; the slot entrance is arranged in an area on one side of the nose tip of the high-speed rail head; the slot exit is arranged in a straight section area on the top of the train head;

[0051] A built-in movable curved panel is arranged at the slot entrance, and a built-in movable flat panel is arranged at the slot exit. Their shapes are similar to the original shape of the entrance area of ​​the high-speed train body, and they are used to close or open the slot entrance and slot exit respectively. Figure 8 A schematic diagram of the present invention when the seams on both sides are closed; Fig. 9 This is a schematic diagram of the two side seams provided by the present invention when they are opened.

[0052] Therefore, when the train brakes, the slot entrances of the slots on both sides are opened, and the airflow is diverted through the slots on both sides and ejected from the slot outlets; thereby increasing the pressure in the entrance area and forming a jet wall at the outlet, causing local separation of the airflow, thereby increasing the train resistance and assisting in achieving short-distance braking.

[0053] In the present invention, since the left and right slots are symmetrically arranged, the right slot configuration in the train forward direction is taken as an example. Figure 3 to Figure 7 , including the slot entrance control section, the first slot middle control section sec1, the second slot middle control section sec2, the third slot middle control section sec3 and the slot exit control section formed in sequence from the entrance to the exit, and the slot shape between the five control sections is formed by a smooth curved surface transition. In the attached drawings, the slot entrance control section, the first slot middle control section sec1, the second slot middle control section sec2, the third slot middle control section sec3 and the slot exit control section are represented by A1, A2, A3, A4 and A5 respectively.

[0054] The coordinate system and related parameters are defined as follows: the nose of the train is taken as the coordinate origin, the x direction is defined as the length direction of the train body, and the positive direction is towards the rear of the train; the y direction is defined as the width direction of the train body, and the positive direction is towards the right side of the train's travel direction; the z direction is defined as the height direction of the train body, and the positive direction is upward; W represents the width of the train body;

[0055] The shapes and positions of the five control sections are described as:

[0056] (1) See Figure 3 , the shape and position of the control section at the entrance of the seam are described as:

[0057] ① On the side of the nose tip, determine the coordinates of the center point O1 as (x1, y1, z1); where x1 is 0.13W; y1 is 0.27W; z1 is 0.13W;

[0058] ② In the yoz plane, take the center point O1 as the center point of the ellipse, determine the major axis radius range to be 0.15W~0.25W, and the minor axis radius range to be 0.06W~0.15W, and form the first ellipse;

[0059] ③ Taking the positive direction of the x-axis as the viewing angle, rotate the first ellipse clockwise around the x-axis by 0° to 45° with the center point O1 to form the second ellipse;

[0060] ④The second ellipse is used to control the shape of the slot entrance. The elliptical plane where the second ellipse is located is the slot entrance control section;

[0061] The method for controlling the shape of the seam entrance is as follows: the interface where the cylinder formed by the second ellipse along the x-axis direction intersects with the surface of the train body is the seam entrance interface; the seam entrance interface is represented by B in the figure.

[0062] (2) See Figure 4 The shape and position of the first slot middle control section sec1 are described as follows:

[0063] The second ellipse is translated and proportionally reduced to form the first seam middle control section sec1; the specific method is:

[0064] ① The second ellipse is translated so that its center point O1 is translated from the position of coordinates (x1, y1, z1) to the position of coordinates (x2, y2, z2), where x2 = x1 + Δx1, Δx1 = 0.07W to 0.67W; y2 = 0.27W; z2 = 0.13W; the position after translation (x2, y2, z2) is marked as the center point O2, and the translated second ellipse is represented as the third ellipse;

[0065] ② Reduce the third ellipse in proportion within a range of 70% to 95% to obtain the middle control section sec1 of the first seam;

[0066] (3) See Figure 5 The shape and position of the second seam middle control section sec2 are described as follows:

[0067] ① Determine the coordinates of the center point O3 as (x3, y3, z3); ​​where x3 = x1 + Δx2, Δx2 = 0.77W to 1.77W; y3 = 0.35W; z3 = 0.15W;

[0068] ② In the yoz plane, take the center point O3 as the center point of the ellipse, determine the major axis radius range to be 0.12W~0.22W, and the minor axis radius range to be 0.05W~0.12W, to form the fourth ellipse;

[0069] ③ Taking the negative direction of the y-axis as the viewing angle, the fourth ellipse rotates 15° to 45° clockwise around the y-axis with the center point O3 to obtain the middle control section sec2 of the second seam;

[0070] (4) See Figure 6 The shape and position of the control section sec3 in the middle of the third seam are described as follows:

[0071] ① Determine the coordinates of the center point O4 as (x4, y4, z4); where x4 = x1 + Δx3, Δx3 = 1.77W to 3.33W; y4 = 0.23W; z4 = z1 + Δz3, Δz3 = 0.07W to 0.67W;

[0072] ② In the xoy plane, take the center point O4 as the center point of the ellipse, determine the major axis radius range to be 0.06W~0.12W, and the minor axis radius range to be 0.01W~0.06W, to form the fifth ellipse;

[0073] ③ Taking the positive direction of the x-axis as the viewing angle, the fifth ellipse rotates -15° to 15° clockwise around the x-axis with the center point O4 to form the middle control section sec3 of the third seam;

[0074] (5) See Figure 7 , the shape and position of the control section at the slot outlet are described as:

[0075] The seam outlet is arranged in a range where the angle between the top plane of the roof behind the front windshield and the xoy plane is less than 10°, and its cross-sectional shape is a waist-shaped hole shape, parallel to the xoy plane, and the coordinates of the center point O5 are (x5, y5, z5); among which, x5 is 2.08W; y5 is 0.23W; z5 is 0.91W; its length range is 0.3W~0.45W, and its width range is 0.02W~0.1W, forming a seam outlet control section.

[0076] Taking the right side seam of the train's forward direction as an example, the preferred embodiment is described below:

[0077] Embodiment 1:

[0078] (1) The shape and position of the control section at the slot entrance are described as follows:

[0079] ① On the side of the nose tip, determine the coordinates of the center point O1 as (x1, y1, z1); where x1 is 0.13W; y1 is 0.27W; z1 is 0.13W;

[0080] ② In the yoz plane, take the center point O1 as the center point of the ellipse, determine the major axis radius to be 0.16W and the minor axis radius to be 0.07W, and form the first ellipse;

[0081] ③ Taking the positive direction of the x-axis as the viewing angle, rotate the first ellipse 10° clockwise around the x-axis with the center point O1 to form the second ellipse;

[0082] ④The second ellipse is used to control the shape of the slot entrance. The elliptical plane where the second ellipse is located is the slot entrance control section;

[0083] The method for controlling the shape of the slot entrance is as follows: the interface where the cylinder formed by the second ellipse along the x-axis direction intersects with the surface of the train body is the slot entrance interface;

[0084] (2) The shape and position of the first slot middle control section sec1 are described as follows:

[0085] The second ellipse is translated and proportionally reduced to form the first seam middle control section sec1; the specific method is:

[0086] ① The second ellipse is translated so that its center point O1 is translated from the position of coordinates (x1, y1, z1) to the position of coordinates (x2, y2, z2), where x2 = x1 + Δx1, Δx1 = 0.43W, therefore, x2 = 0.56W; y2 = 0.27W; z2 = 0.13W; the position after translation (x2, y2, z2) is marked as the center point O2, and the translated second ellipse is represented as the third ellipse;

[0087] ② Reduce the third ellipse in proportion to 90%, and obtain the middle control section sec1 of the first seam;

[0088] (3) The shape and position of the second slot middle control section sec2 are described as follows:

[0089] ① Determine the coordinates of the center point O3 as (x3, y3, z3); ​​where x3 = x1 + Δx2, Δx2 = 1.43W, therefore, x3 = 1.56W; y3 = 0.35W; z3 = 0.15W;

[0090] ② In the yoz plane, take the center point O3 as the center point of the ellipse, determine the major axis radius to be 0.14W and the minor axis radius to be 0.06W, and form the fourth ellipse;

[0091] ③ Taking the negative direction of the y-axis as the viewing angle, the fourth ellipse rotates 30° clockwise around the y-axis with the center point O3 to obtain the middle control section sec2 of the second seam;

[0092] (4) The shape and position of the third slot middle control section sec3 are described as follows:

[0093] ① Determine the coordinates of the center point O4 as (x4, y4, z4); where x4 = x1 + Δx3, Δx3 = 1.84W, therefore, x4 = 1.97W; y4 = 0.23W; z4 = z1 + Δz3, Δz3 = 0.26W, therefore, z4 = 0.39W;

[0094] ② In the xoy plane, take the center point O4 as the center point of the ellipse, determine the major axis radius to be 0.11W and the minor axis radius to be 0.05W, and form the fifth ellipse;

[0095] ③ Taking the positive direction of the x-axis as the viewing angle, the fifth ellipse rotates 5° clockwise around the x-axis with the center point O4 to form the middle control section sec3 of the third seam;

[0096] (5) The shape and position of the control section at the slot outlet are described as follows:

[0097] The seam outlet is arranged within the range of an angle of less than 10° between the top plane of the roof behind the front windshield and the xoy plane. Its cross-sectional shape is a waist-shaped hole shape, parallel to the xoy plane, and the coordinates of the center point O5 are (x5, y5, z5); among which, x5 is 2.08W; y5 is 0.23W; z5 is 0.91W; its length is 0.36W and its width is 0.05W, forming a seam outlet control section.

[0098] Aerodynamic analysis and calculation were performed on a train model without a slot and a train model with a slot configuration according to an embodiment of the present invention. The results are shown in Table 1:

[0099] Table 1 Aerodynamic analysis results of train model

[0100]

[0101] Among them: the train body drag coefficient refers to the drag coefficient of the train body; the seam drag coefficient refers to the drag coefficient of the seam alone; the vehicle drag coefficient is the sum of the train body drag coefficient and the seam drag coefficient; the lift coefficient refers to the lift coefficient of the vehicle under the combined effect of the train and the seam.

[0102] It can be seen from Table 1 that when the slot is not opened, the drag coefficient of the train body and the drag coefficient of the whole vehicle are both 0.308, and the lift coefficient is 0.057; when the slot configuration of the first embodiment of the present invention is opened, the drag coefficient of the train body is 0.308, which is almost unchanged, and the slot drag coefficient is 0.033, resulting in the drag coefficient of the whole vehicle increasing to 0.341. By opening the slot configuration of the first embodiment of the present invention, the drag coefficient of the whole vehicle is increased. Compared with not opening the slot, the lift coefficient of the present invention is reduced by opening the slot.

[0103] Therefore, compared with a vehicle without a slot, the present invention increases the drag coefficient of the entire vehicle by opening the slot, thereby shortening the braking distance; the present invention reduces the lift coefficient, slightly increases the downforce of the train, and improves the driving safety of the train.

[0104] Therefore, the slot device designed in the present invention can greatly increase the resistance of the train, effectively reduce the braking distance, and has a simple control method. It is an effective resistance control method that meets the need for short-distance braking when the high-speed railway is running at high speed.

[0105] The invention is derived from the needs of engineering applications. Based on the principles of aerodynamics, the slot channel and train resistance control are innovatively and organically combined to propose a slot channel device for high-speed train resistance control, which is an original innovation. The slot channel device for high-speed rail resistance control provided by the invention has the following main innovations: the idea of ​​applying the slot channel device in the high-speed rail body and its structural form, including the composition of the slot channel and the layout of the slot channel entrance and exit, and further including the shape of the five control sections themselves and their position relationship relative to the train body.

[0106] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A high-speed rail resistance control slot device, characterized in that: It includes a left side seam and a right side seam that are symmetrically arranged relative to the middle section of the train body; and the left side seam and the right side seam are symmetrically arranged on the two side surfaces inside the head area of ​​the train head; the seam on each side includes a seam entrance and a seam exit; the seam entrance is arranged in the area on one side of the nose tip of the high-speed train head; the seam exit is arranged in the straight section area on the top of the train head; When the train brakes, the slot entrances of the slots on both sides are opened, and the airflow is diverted through the slots on both sides and ejected from the slot exits; thereby increasing the pressure in the entrance area and forming a jet wall at the exit, causing partial separation of the airflow, thereby increasing the train resistance and assisting in achieving short-distance braking.

2. A high-speed rail resistance control slot device according to claim 1, characterized in that: For the right side of the seam in the forward direction of the train, it includes the seam entrance control section, the first seam middle control section sec1, the second seam middle control section sec2, the third seam middle control section sec3 and the seam exit control section formed in sequence from the entrance to the exit direction; The coordinate system and related parameters are defined as follows: the nose of the train is taken as the coordinate origin, the x direction is defined as the length direction of the train body, and the positive direction is towards the rear of the train; the y direction is defined as the width direction of the train body, and the positive direction is towards the right side of the train's travel direction; the z direction is defined as the height direction of the train body, and the positive direction is upward; W represents the width of the train body; (1) The shape and position of the control section at the slot entrance are described as follows: ① On the side of the nose tip, determine the coordinates of the center point O1 as (x1, y1, z1); where x1 is 0.13W; y1 is 0.27W; z1 is 0.13W; ② In the yoz plane, take the center point O1 as the center point of the ellipse, determine the major axis radius range to be 0.15W~0.25W, and the minor axis radius range to be 0.06W~0.15W, and form the first ellipse; ③ Taking the positive direction of the x-axis as the viewing angle, rotate the first ellipse clockwise around the x-axis by 0° to 45° with the center point O1 to form the second ellipse; ④The second ellipse is used to control the shape of the slot entrance. The elliptical plane where the second ellipse is located is the slot entrance control section; The method for controlling the shape of the slot entrance is as follows: the interface where the cylinder formed by the second ellipse along the x-axis direction intersects with the surface of the train body is the slot entrance interface; (2) The shape and position of the first slot middle control section sec1 are described as follows: The second ellipse is translated and proportionally reduced to form the first seam middle control section sec1; the specific method is: ① The second ellipse is translated so that its center point O1 is translated from the position of coordinates (x1, y1, z1) to the position of coordinates (x2, y2, z2), where x2 = x1 + Δx1, Δx1 = 0.07W to 0.67W; y2 = 0.27W; z2 = 0.13W; the position after translation (x2, y2, z2) is marked as the center point O2, and the translated second ellipse is represented as the third ellipse; ② Reduce the third ellipse in proportion within a range of 70% to 95% to obtain the middle control section sec1 of the first seam; (3) The shape and position of the second slot middle control section sec2 are described as follows: ① Determine the coordinates of the center point O3 as (x3, y3, z3); ​​where x3 = x1 + Δx2, Δx2 = 0.77W to 1.77W; y3 = 0.35W; z3 = 0.15W; ② In the yoz plane, take the center point O3 as the center point of the ellipse, determine the major axis radius range to be 0.12W~0.22W, and the minor axis radius range to be 0.05W~0.12W, to form the fourth ellipse; ③ Taking the negative direction of the y-axis as the viewing angle, the fourth ellipse rotates 15° to 45° clockwise around the y-axis with the center point O3 to obtain the middle control section sec2 of the second seam; (4) The shape and position of the third slot middle control section sec3 are described as follows: ① Determine the coordinates of the center point O4 as (x4, y4, z4); where x4 = x1 + Δx3, Δx3 = 1.77W to 3.33W; y4 = 0.23W; z4 = z1 + Δz3, Δz3 = 0.07W to 0.67W; ② In the xoy plane, take the center point O4 as the center point of the ellipse, determine the major axis radius range to be 0.06W~0.12W, and the minor axis radius range to be 0.01W~0.06W, to form the fifth ellipse; ③ Taking the positive direction of the x-axis as the viewing angle, the fifth ellipse rotates -15° to 15° clockwise around the x-axis with the center point O4 to form the middle control section sec3 of the third seam; (5) The shape and position of the control section at the slot outlet are described as follows: The seam outlet is arranged in a range where the angle between the top plane of the roof behind the front windshield and the xoy plane is less than 10°, and its cross-sectional shape is a waist-shaped hole shape, parallel to the xoy plane, and the coordinates of the center point O5 are (x5, y5, z5); among which, x5 is 2.08W; y5 is 0.23W; z5 is 0.91W; its length range is 0.3W~0.45W, and its width range is 0.02W~0.1W, forming a seam outlet control section.

3. A high-speed rail resistance control slot device according to claim 1, characterized in that: A built-in movable curved panel is arranged at the slot entrance, and a built-in movable flat panel is arranged at the slot exit, which are used to close or open the slot entrance and the slot exit respectively.

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