Aerodynamic force testing device for axle section model

Abstract

The invention discloses an axle segment model aerodynamic force testing device, which comprises two oppositely arranged frames, mounting assemblies, index plates, a connecting unit, a first force measuring balance and a second force measuring balance, the mounting assemblies are respectively arranged at the upper part and the lower part between the two frames, the index plates are respectively and rotatably arranged on the two mounting assemblies, and the connecting unit is connected with the first force measuring balance and the second force measuring balance. The index plate is fixedly connected with a connecting unit, and a first force measuring balance and a second force measuring balance are mounted on the two connecting units; the axle segment model is placed between the two connecting units, the two ends of the bridge model are fixedly connected with first force measuring balances, and the two ends of the train model are fixedly connected with second force measuring balances; the index plate drives the axle segment model to rotate so as to change the wind attack angle. The index plates above and below the frame of the aerodynamic force testing device can realize synchronous rotation, and drive the connecting unit and the first force measuring balance and the second force measuring balance fixed on the connecting unit to rotate, so as to drive the bridge model and the train model to rotate to a proper wind attack angle for a wind tunnel test.

Description

Technical Field

[0001] The present application relates to the technical field of wind tunnel test equipment for measuring the force of axle systems, and in particular to an aerodynamic force testing device for axle segment models. Background Art

[0002] With the continuous development of high-speed railways, the continuous increase in traffic flow, the gradual reduction in the area that can be expropriated, the increasing number of railway bridges and dual-use bridges, the proportion of experiments to measure the aerodynamic parameters under the interaction between trains and bridges is increasing. Some bridges have a large number of lines, different line positions, and the mutual influence between lines on the same and different layers may cause significant changes in the aerodynamic characteristics of vehicles and bridges. It is necessary to measure the aerodynamic characteristics of the bridge under different vehicle conditions. However, the existing experimental device has complicated operating steps and limited scope of application. When measuring different wind attack angles, it is necessary to enter the wind tunnel to adjust the angle, which greatly affects the progress of the experiment. In order to expand the scope of application of the equipment, save resources, and improve experimental efficiency, this bridge force measuring device is designed. Summary of the invention

[0003] The invention provides an aerodynamic force testing device for a vehicle bridge segment model, so as to solve the technical problems in the prior art that the testing device is complicated to operate and has a limited application range.

[0004] To achieve the above object, the technical solution provided by the present invention is as follows:

[0005] The present invention provides an aerodynamic testing device for a bridge segment model, comprising two relatively arranged frames, a mounting assembly, a dividing plate, a connecting unit, a first force balance and a second force balance, wherein the mounting assembly is respectively arranged above and below the two frames, and the dividing plates are rotatably arranged on the two mounting assemblies, the dividing plates are respectively fixedly connected to one of the connecting units, and the first force balance and the second force balance are both installed on the two connecting units; the bridge segment model is placed between the two connecting units, both ends of the bridge model are fixedly connected to the first force balance, and both ends of the train model are fixedly connected to the second force balance; the dividing plate drives the bridge segment model to rotate to change the wind attack angle.

[0006] Further, the connecting unit includes a central connecting member, a first fixed rod, a second fixed rod and a sliding rod, the central connecting member is installed on the dividing plate, the first fixed rod is fixed on the central connecting member, the second fixed rod is arranged parallel to the first fixed rod and spaced apart, and the sliding rod can be slidably mounted on the first fixed rod and the second fixed rod respectively; the first force measuring balance is fixed on the top of the central connecting member, and the second force measuring balance can be slidably installed on the sliding rod.

[0007] Furthermore, the central connecting member includes a connecting plate, a central axis and a fixed plate, the connecting plate is fixed on the dividing plate, the central axis is fixed on the connecting plate, and the fixed plate is fixed on the central axis; the first fixing rod is fixedly connected to the fixed plate.

[0008] Furthermore, there are two fixing plates, which are arranged in parallel with each other at an interval; the first fixing rod is fixed between the two fixing plates, and the first force balance is fixed to the top of the upper fixing plate.

[0009] Furthermore, the number of the first fixed rod, the second fixed rod and the sliding rod are two respectively, one end of each of the first fixed rods is fixed to the central connecting member, and the other end is slidably connected to one of the sliding rods; two second fixed rods are arranged in parallel and spaced apart on both sides of the first fixed rod, both ends of the sliding rod can be slidably mounted on one of the second fixed rods, and each of the sliding rods can be slidably mounted on one of the first fixed rods.

[0010] Furthermore, the mounting assembly includes a mounting plate and two mounting rods, both ends of the mounting rods are respectively fixed on a frame, and the two mounting rods are arranged relatively spaced apart; a dividing plate is rotatably mounted on the mounting plate, and the mounting plate is fixedly connected to the two mounting rods respectively.

[0011] Furthermore, the axle segment model includes an end plate, a bridge model and a train model, both ends of the bridge model are fixed to the end plates, and both ends of the train model pass through the end plates to connect to the second force balance.

[0012] Furthermore, the frame includes a rubber disc, a fastener, two oppositely arranged cross bars, and two oppositely arranged vertical bars, and the adjacent cross bars are fixedly connected to the vertical bars; the rubber discs are arranged at both ends of the vertical bars, and the fasteners fix the rubber discs to the vertical bars.

[0013] Furthermore, the frame also includes a height adjustment unit, one end of which is fixed to the vertical rod, and the other end is fixed to the upper cross bar so that the cross bar moves along the vertical rod; one height adjustment unit is arranged on each vertical rod.

[0014] Furthermore, the height adjustment unit includes a fixing member, a supporting member and a telescopic assembly, the fixing member is installed on the vertical rod, the supporting member is fixed on the fixing member, one end of the telescopic assembly is fixed on the supporting member, and the other end is fixed on the cross bar.

[0015] The aerodynamic test device for a bridge segment model provided by the present invention has index plates set on the mounting components above and below the frame, and the connecting unit is fixed by the index plates, and the first force measuring balance and the second force measuring balance are fixed on the connecting unit, and the first force measuring balance is connected to the two ends of the bridge model, and the second force measuring balance is connected to the two ends of the train model; the index plates above and below the frame can realize synchronous rotation, and drive the connecting unit and the first force measuring balance and the second force measuring balance fixed thereon to rotate, thereby driving the bridge model and the train model to rotate to a suitable wind attack angle for wind tunnel testing. The above-mentioned aerodynamic test device is simple to install, easy to operate, and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 Schematic diagram of the structure of the aerodynamic force testing device for the axle segment model in an embodiment of the present invention (the upper mounting assembly is omitted);

[0018] Figure 2 for Figure 1 Schematic diagram of the connection structure between the middle mounting plate, the indexing plate and the connection unit;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the mid-height adjustment unit.

[0020] Reference numerals:

[0021] 1. Framework;

[0022] 11. vertical rod; 12. horizontal rod; 131. rubber disc; 132. fastener; 14. height adjustment unit; 141. fixing member; 142. supporting member; 143. telescopic assembly;

[0023] 2. Mounting assembly; 21. Mounting plate; 22. Mounting rod;

[0024] 3. Indexing plate;

[0025] 4. Connecting unit;

[0026] 411, connecting plate; 412, central axis; 413, fixing plate;

[0027] 42. first fixed rod; 43. second fixed rod; 44. sliding rod;

[0028] 5. First force measuring balance; 6. Second force measuring balance; 7. Bridge model; 8. Train model; 9. End plate. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0033] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0034] An embodiment of the present application provides an aerodynamic testing device for an axle segment model, comprising two relatively arranged frames 1, a mounting assembly 2, a dividing plate 3, a connecting unit 4, a first force measuring balance 5, and a second force measuring balance 6. The mounting assembly 2 is respectively arranged above and below the two frames 1, and dividing plates 3 are rotatably arranged on the two mounting assemblies 2. The dividing plates 3 are respectively fixedly connected to a connecting unit 4, and the first force measuring balance 5 and the second force measuring balance 6 are installed on the two connecting units 4; the axle segment model is placed between the two connecting units 4, both ends of the bridge model 7 are fixedly connected to the first force measuring balance 5, and both ends of the train model 8 are fixedly connected to the second force measuring balance 6; the dividing plate 3 drives the axle segment model to rotate to change the wind attack angle.

[0035] In the embodiment of the present application, the dividing plate 3 is fixedly connected to a connecting unit 4, and the first force measuring balance 5 and the second force measuring balance 6 are respectively fixed on the connecting unit 4; the dividing plate 3 is used to drive the axle segment model connected to the force measuring balance to rotate, so that the position of the axle segment model can be accurately controlled, so as to facilitate the simulation of the test conditions of any wind attack angle. Specifically, the mounting components 2 above and below the frame 1 are respectively rotated to set the dividing plates 3, and the connecting units 4 are fixed on the two dividing plates 3, and the axle segment model is installed between the two connecting units 4. The two dividing plates 3 can be controlled to rotate synchronously through the program, so that the axle segment model rotates between the two mounting components 2 to adjust different angular positions.

[0036] In the embodiment of the present application, the mounting assembly 2 is used to rotatably set the indexing plate 3, and the mounting assembly 2 is set between the two frames 1, and can be a plate-shaped structure or a rod-shaped structure, and its structure is not limited. The connecting unit 4 is fixedly connected to the indexing plate 3 and rotates under the drive of the indexing plate 3. The first force measuring balance 5 and the second force measuring balance 6 are respectively set according to the positions of the bridge model 7 and the train model 8.

[0037] The aerodynamic test device for the axle segment model of the embodiment of the present application has a dividing plate 3 set on the mounting assembly 2 above and below the frame 1, and a connecting unit 4 is fixed by the dividing plate 3, and the first force measuring balance 5 and the second force measuring balance 6 are fixed on the connecting unit 4, and the first force measuring balance 5 is connected to the two ends of the bridge model 7, and the second force measuring balance 6 is connected to the two ends of the train model 8; the dividing plates 3 above and below the frame 1 can realize synchronous rotation, and drive the connecting unit 4 and the first force measuring balance 5 and the second force measuring balance 6 fixed thereon to rotate, thereby driving the bridge model 7 and the train model 8 to rotate to a suitable wind attack angle for wind tunnel testing. The above-mentioned aerodynamic test device is simple to install and easy to operate, which improves the test efficiency.

[0038] In some embodiments, the connecting unit 4 includes a central connecting member, a first fixed rod 42, a second fixed rod 43 and a sliding rod 44. The central connecting member is installed on the dividing plate 3, the first fixed rod 42 is fixed on the central connecting member, the second fixed rod 43 is arranged parallel to the first fixed rod 42, and the sliding rod 44 can be slidably mounted on the first fixed rod 42 and the second fixed rod 43 respectively; the first force measuring balance 5 is fixed to the top of the central connecting member, and the second force measuring balance 6 can be slidably installed on the sliding rod 44.

[0039] Reference Figure 2 In the embodiment of the present application, the first fixed rod 42, the second fixed rod 43 and the sliding rod 44 are respectively fixed to the dividing plate 3 directly or indirectly through the central connecting piece, so as to rotate under the drive of the dividing plate 3. The first fixed rod 42, the second fixed rod 43 and the sliding rod 44 can all be aluminum profiles with slide grooves. The sliding rod 44 can be slidably mounted on the first fixed rod 42 and the second fixed rod 43, and the second force measuring balance 6 can be slidably installed on the sliding rod 44, so that the second force measuring balance 6 can slide in the direction along the first fixed rod 42 and in the direction perpendicular to the first fixed rod 42, so as to adapt to the test conditions where the train model 8 is in different positions. The second force measuring balance 6 can realize its movement on the sliding rod 44 through the connecting piece; the connecting piece can move on the sliding rod 44.

[0040] The second force measuring balance 6 is connected to the train model 8 to measure the force of the train model 8 at different positions and different wind attack angles. A plurality of second force measuring balances 6 can also be installed to be applicable to the situation where there are multiple train tracks on the bridge. The first force measuring balance 5 is fixed to the top of the central connecting piece to connect the bridge model 7 to measure the force of the bridge model 7 at different wind attack angles.

[0041] The aerodynamic testing device of the embodiment of the present application can make the bridge model 7 and the train model 8 rotate synchronously at different angles, so that it can be applied to test conditions of any wind attack angle; and it is suitable for various vehicle bridge models with the train model 8 in different positions, with high test efficiency and a wide range of applications.

[0042] In some embodiments, the central connecting member includes a connecting plate 411, a central axis 412 and a fixing plate 413. The connecting plate 411 is fixed to the indexing plate 3, the central axis 412 is fixed to the connecting plate 411, and the fixing plate 413 is fixed to the central axis 412; the first fixing rod 42 is fixedly connected to the fixing plate 413. In the embodiment of the present application, the connecting plate 411 is fixedly connected to the indexing plate 3 to avoid the situation that the connection between the central axis 412 and the indexing plate 3 is not stable enough; the first fixing rod 42 is fixed to the fixing plate 413 to avoid the situation that the connection between the central axis 412 and the first fixing rod 42 is unstable.

[0043] Furthermore, there are two fixed plates 413, and the two fixed plates 413 are arranged in parallel with each other; the first fixed rod 42 is fixed between the two fixed plates 413, and the first force measuring balance 5 is fixed to the top of the upper fixed plate 413. In the embodiment of the present application, the first fixed rod 42 can be welded between the two fixed plates 413; or the end faces of the first fixed rod 42 are respectively welded to the side end faces of the first fixed rod 42. The two fixed plates 413 are provided, on the one hand, to facilitate the fixed connection of the first force measuring balance 5 at the top, and on the other hand, to reduce the weight of the entire central connecting piece, that is, to reduce the weight of the connecting unit 4, so that the dividing plate 3 drives the connecting unit 4 and the axle segment model to rotate.

[0044] In some embodiments, the number of the first fixed rod 42, the second fixed rod 43, and the sliding rod 44 are respectively two, one end of each first fixed rod 42 is fixed to the central connecting member, and the other end is slidably connected to a sliding rod 44; the two second fixed rods 43 are arranged in parallel and spaced apart on both sides of the first fixed rod 42, both ends of the sliding rod 44 can be slidably mounted on a second fixed rod 43, and each sliding rod 44 can be slidably mounted on a first fixed rod 42.

[0045] Reference Figure 2 The first fixed rod 42, the second fixed rod 43 and the sliding rod 44 are each provided with two, so that the connecting unit 4 is more balanced and more stable when driven by the indexing plate 3. The train model 8 can be arranged on the same side or both sides of the first fixed rod 42 according to actual needs. The arrangement of two sliding rods 44 can also adapt to the bridge type with two upper and lower bridge decks open to traffic.

[0046] In some embodiments, the mounting assembly 2 includes a mounting plate 21 and two mounting rods 22, both ends of the mounting rods 22 are respectively fixed on a frame 1, and the two mounting rods 22 are arranged relatively spaced apart; a dividing plate 3 is rotatably mounted on the mounting plate 21, and the mounting plate 21 is respectively fixedly connected to the two mounting rods 22. Figure 1 In the embodiment of the present application, the mounting rod 22 is arranged between the two frames 1 to connect the two frames 1, and the distance between the two frames 1 can be adjusted by using angle steel. The mounting rod 22 can be an aluminum profile with a slide groove. Two mounting rods 22 are respectively arranged above and below the frame 1 instead of a plate-like structure, which can increase the stability of the aerodynamic test device while reducing the overall weight of the test device. The dividing plate 3 can be fixed by a smaller mounting plate 21, and the two ends of the mounting plate 21 are respectively fixed on the two mounting rods 22. Specifically, the dividing plate 3 is divided into two layers, the bottom plate is fixedly connected to the mounting plate 21, and the upper plate is rotatably connected to the bottom plate; the other end of the upper plate is fixedly connected to the connecting plate 411 of the center connecting member. The dividing plate 3 can drive the center connecting member to rotate to any precise angle, and then be fixed to the angle through the built-in card slot.

[0047] In some embodiments, the axle segment model includes an end plate 9, a bridge model 7 and a train model 8. The two ends of the bridge model 7 are fixed with the end plates 9, and the two ends of the train model 8 pass through the end plates 9 to connect the second force measuring balance 6. In the embodiment of the present application, the train model 8 is provided with a single lane or multiple lanes according to the actual situation; the second force measuring balance 6 is provided corresponding to the train model 8. The first force measuring balance 5 is fixedly connected to the bridge model 7.

[0048] In some embodiments, the frame 1 includes a rubber disc 131, a fastener 132, two oppositely arranged cross bars 12, and two oppositely arranged vertical bars 11. The adjacent cross bars 12 are fixedly connected to the vertical bars 11; rubber discs 131 are provided at both ends of the vertical bars 11, and the fasteners 132 fix the rubber discs 131 to the vertical bars 11. In the embodiment of the present application, the cross bars 12 and the vertical bars 11 can be aluminum profiles with slide grooves; the connection position between the cross bars 12 and the vertical bars 11 can be adjusted by angle steel to facilitate the construction of brackets in wind tunnels of different volumes. The rubber disc 131 can be connected to the vertical bars 11 through the connecting portion provided by itself. The length of the connecting portion is designed according to the actual situation. The fastener 132 can change the total height of the vertical bars 11 and the rubber disc 131 by adjusting the fastening position of the connecting portion to adapt to wind tunnel tests of different sizes.

[0049] Furthermore, the frame 1 further comprises a height adjustment unit 14, one end of which is fixed to the vertical rod 11, and the other end of which is fixed to the upper cross bar 12 so that the cross bar 12 can move along the vertical rod 11; each vertical rod 11 is provided with a height adjustment unit 14. Figure 1 After the crossbar 12 and the vertical bar 11 are fixedly connected to form the frame 1, the height adjustment unit 14 can fine-tune the fixed position of the crossbar 12 on the vertical bar 11. In the experiment, the crossbar 12 is heavy, and the height adjustment unit 14 saves manpower and improves the adjustment efficiency. The height adjustment unit 14 on each vertical bar 11 is adjusted accordingly according to actual needs.

[0050] Specifically, the height adjustment unit 14 includes a fixing member 141, a supporting member 142 and a telescopic assembly 143. The fixing member 141 is installed on the vertical rod 11, the supporting member 142 is fixed on the fixing member 141, one end of the telescopic assembly 143 is fixed on the supporting member 142, and the other end is fixed on the cross bar 12. In the embodiment of the present application, the connection position between the fixing member 141 and the vertical rod 11 can be adjusted. The supporting member 142 is used to fix the telescopic assembly 143. During the test, the position of the fixing member 141 is determined according to actual needs, so that the telescopic assembly 143 can raise or lower the height of the cross bar 12. The telescopic assembly 143 can be an electrically controlled telescopic rod.

[0051] The operation process of installing the aerodynamic test device of the axle segment model of the embodiment of the present application in the wind tunnel is as follows: 1. Build the vertical rod 11, the horizontal rod 12 of the frame 1 and the mounting rod 22 of the mounting assembly 2 according to the actual required size, and fix the rubber disc 131 to the two ends of each vertical rod 11 through the fastener 132, and fix the frame 1 in the wind tunnel. 2. Use the fixing member 141 and the supporting member 142 to fix the telescopic assembly 143 on each vertical rod 11, and fix one end of the telescopic assembly 143 to the corresponding horizontal rod 12. 3. According to Figure 1 Connect and fix the upper and lower mounting plates 21, the dividing plate 3 and the connecting unit 4 in sequence; and fix and install the first force measuring balance 5 and the second force measuring balance 6. 4. Fix the lower first force measuring balance 5 to the end plate 9 and the bottom end of the bridge model 7; after loosening the angle steel of the upper cross bar 12, adjust the position of the upper first force measuring balance 5 through the four electrically controlled telescopic rods, so that the upper first force measuring balance 5 is fixedly connected to the top of the bridge model 7, and then re-fix the angle steel on the cross bar 12. 5. Adjust the position of the sliding rod 44 and the second force measuring balance 6 to coincide with the position of the train model 8, and fix the train model 8 and the second force measuring balance 6. Fix the position of the second force measuring balance 6. The aerodynamic test device is built through the above operation process.

[0052] The wind direction in the wind tunnel is fixed, so the aerodynamic test device for the axle segment model of the embodiment of the present application adjusts the angle of the axle segment model by synchronously rotating the upper and lower dividing plates 3, thereby simulating different wind attack angles, and during the rotation process, the relative positions of the train model 8 and the bridge model 7 remain unchanged. After rotating to the required angle, the dividing plate 3 is automatically locked at this angle. When conducting a wind tunnel test, if only the wind attack angle needs to be changed, it is only necessary to adjust the angle of the dividing plate 3 outside the wind tunnel through the M200 controller corresponding to the dividing plate 3. There is no need to manually measure the angle in the wind tunnel, which saves manpower and time and avoids large measurement errors.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An aerodynamic test device for a bridge segment model, characterized in that: It comprises two frames arranged opposite to each other, a mounting assembly, a dividing plate, a connecting unit, a first force measuring balance and a second force measuring balance, wherein the mounting assembly is respectively arranged above and below the two frames, the dividing plates are respectively rotatably arranged on the two mounting assemblies, the dividing plates are respectively fixedly connected to one of the connecting units, and the first force measuring balance and the second force measuring balance are both installed on the two connecting units; The axle segment model is placed between the two connection units, both ends of the bridge model are fixedly connected to the first force measuring balance, and both ends of the train model are fixedly connected to the second force measuring balance; the dividing plate drives the axle segment model to rotate to change the wind attack angle.

2. The aerodynamic force testing device for axle segment model according to claim 1, characterized in that: The connecting unit includes a central connecting member, a first fixed rod, a second fixed rod and a sliding rod, the central connecting member is installed on the dividing plate, the first fixed rod is fixed on the central connecting member, the second fixed rod is arranged parallel to the first fixed rod and spaced apart, and the sliding rod can be slidably mounted on the first fixed rod and the second fixed rod respectively; the first force measuring balance is fixed on the top end of the central connecting member, and the second force measuring balance can be slidably installed on the sliding rod.

3. The aerodynamic force testing device for axle segment model according to claim 2, characterized in that: The central connecting member includes a connecting plate, a central axis and a fixed plate, the connecting plate is fixed on the dividing plate, the central axis is fixed on the connecting plate, and the fixed plate is fixed on the central axis; the first fixing rod is fixedly connected to the fixed plate.

4. The aerodynamic force testing device for axle segment model according to claim 3, characterized in that: There are two fixing plates, which are spaced apart and arranged in parallel; the first fixing rod is fixed between the two fixing plates, and the first force balance is fixed to the top of the upper fixing plate.

5. The aerodynamic force testing device for axle segment model according to claim 2, characterized in that: The number of the first fixed rod, the second fixed rod and the sliding rod are two respectively, one end of each of the first fixed rods is fixed to the central connecting member, and the other end is slidably connected to one of the sliding rods; two second fixed rods are arranged in parallel and spaced apart on both sides of the first fixed rod, both ends of the sliding rod can be slidably mounted on one of the second fixed rods, and each of the sliding rods can be slidably mounted on one of the first fixed rods.

6. The aerodynamic force testing device for axle segment model according to any one of claims 1 to 5, characterized in that: The mounting assembly includes a mounting plate and two mounting rods, both ends of the mounting rods are respectively fixed on a frame, and the two mounting rods are arranged relatively spaced apart; a dividing plate is rotatably mounted on the mounting plate, and the mounting plate is fixedly connected to the two mounting rods respectively.

7. The aerodynamic force testing device for axle segment models according to any one of claims 1 to 5, characterized in that: The axle segment model includes an end plate, a bridge model and a train model. Both ends of the bridge model are fixed with the end plates, and both ends of the train model pass through the end plates to connect with the second force balance.

8. The aerodynamic force testing device for axle segment model according to any one of claims 1 to 5, characterized in that: The frame includes a rubber disc, a fastener, two oppositely arranged cross bars, and two oppositely arranged vertical bars. The adjacent cross bars are fixedly connected to the vertical bars. The rubber discs are arranged at both ends of the vertical bars, and the fasteners fix the rubber discs on the vertical bars.

9. The aerodynamic force testing device for axle segment model according to claim 8, characterized in that: The frame also includes a height adjustment unit, one end of which is fixed on the vertical rod, and the other end is fixed on the upper cross bar so that the cross bar moves along the vertical rod; one height adjustment unit is arranged on each vertical rod.

10. The aerodynamic force testing device for axle segment model according to claim 9, characterized in that: The height adjustment unit includes a fixing member, a supporting member and a telescopic assembly. The fixing member is installed on the vertical rod, the supporting member is fixed on the fixing member, one end of the telescopic assembly is fixed on the supporting member, and the other end is fixed on the cross rod.

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