Aerodynamic force testing device for vehicle axle segment model

Abstract

The application discloses a kind of axle segment model aerodynamic force testing devices, including two frames of relative arrangement, installation component, index plate, connecting unit and first force balance, second force balance, installation component is respectively arranged between two frames in upper and lower, two installation components are respectively rotationally provided with index plate, index plate is respectively fixedly connected one connecting unit, first force balance, second force balance are all installed on two connecting units;Axle segment model is placed between two connecting units, the two ends of bridge model are all fixedly connected first force balance, the two ends of train model are all fixedly connected second force balance;Index plate drives axle segment model to rotate to change wind attack angle.The frame upper and lower of the aerodynamic force testing device index plate can realize synchronous rotation, and drive connecting unit and fixed on it first force balance, second force balance rotate, to drive bridge model and train model to rotate to suitable wind attack angle and carry out 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 an axle system, and particularly relates to a device for testing the aerodynamic force of an axle segment model. BACKGROUND

[0002] With the continuous development of high-speed railways, the continuous increase in traffic flow, and the gradual reduction in available land, the number of railway bridges and highway-railway combined bridges is increasing, and the proportion of experiments for measuring aerodynamic parameters under the interaction of trains and bridges is increasing. Due to the large number of bridge lines, the mutual influence between different line positions, the same layer and different layers of lines may cause significant changes in the aerodynamic characteristics of vehicles and bridges, and it is necessary to measure the aerodynamic characteristics of vehicles and bridges under different vehicle conditions. However, the existing experimental device has a complicated operation procedure, a limited application range, and needs to be adjusted into a wind tunnel to measure different wind attack angles, which greatly affects the experimental progress. In order to improve the application range of the device, save resources, and improve the experimental efficiency, the present application provides a device for measuring the force of an axle. SUMMARY

[0003] The present application provides a device for testing the aerodynamic force of an axle segment model to solve the technical problem of a complicated operation procedure and a limited application range of the existing testing device.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the present application is as follows:

[0005] The present application provides a device for testing the aerodynamic force of an axle segment model, which comprises two frames arranged oppositely, mounting assemblies, index plates, connecting units, and first and second force measuring balances. The mounting assemblies are arranged above and below the two frames, respectively. The index plates are rotatably arranged on the two mounting assemblies, respectively. The index plates are fixedly connected to the connecting units, respectively. The first and second force measuring balances are installed on the connecting units, respectively. The axle segment model is placed between the two connecting units. The two ends of the bridge model are fixedly connected to the first force measuring balance. The two ends of the train model are fixedly connected to the second force measuring balance. The index plate drives the axle segment model to rotate to change the wind attack angle.

[0006] Further, the connecting unit comprises a central connecting piece, a first fixed rod, a second fixed rod, and a sliding rod. The central connecting piece is installed on the index plate. The first fixed rod is fixed to the central connecting piece. The second fixed rod is arranged in parallel and spaced apart from the first fixed rod. The sliding rod is slidably sleeved on the first fixed rod and the second fixed rod, respectively. The first force measuring balance is fixed to the top end of the central connecting piece. The second force measuring balance is slidably installed on the sliding rod.

[0007] Further, the center connector comprises a connecting plate, a center shaft and a fixing plate, the connecting plate is fixed on the index disc, the center shaft is fixed on the connecting plate, and the fixing plate is fixed on the center shaft; the first fixing rod is fixedly connected with the fixing plate.

[0008] Further, the number of the fixing plates is two, and the two fixing plates are arranged in parallel at intervals; the first fixing rod is fixed between the two fixing plates, and the first load cell is fixed at the top end of the upper fixing plate.

[0009] Further, the number of the first fixing rods, the second fixing rods and the sliding rods is two respectively, one end of each first fixing rod is fixed on the center connector, and the other end of each first fixing rod is slidably connected with a sliding rod; the two second fixing rods are arranged in parallel at intervals on the two sides of the first fixing rods, the two ends of each sliding rod are slidably sleeved on a second fixing rod, and each sliding rod is slidably sleeved on a first fixing rod.

[0010] Further, the mounting assembly comprises a mounting plate and two mounting rods, the two ends of each mounting rod are fixed on a frame respectively, and the two mounting rods are arranged in opposite directions at intervals; the mounting plate is rotatably mounted with the index disc, and the mounting plate is fixedly connected with the two mounting rods respectively.

[0011] Further, the axle segment model comprises end plates, a bridge model and a train model, the two ends of the bridge model are fixed with the end plates, and the two ends of the train model pass through the end plates to be connected with the second load cell.

[0012] Further, the frame comprises rubber discs, fasteners and two horizontal rods arranged in opposite directions, two vertical rods arranged in opposite directions, and adjacent horizontal rods and vertical rods are fixedly connected; the two ends of each vertical rod are provided with the rubber discs, and the fasteners are used to fix the rubber discs on the vertical rods.

[0013] Further, the frame further comprises a height adjusting unit, one end of the height adjusting unit is fixed on the vertical rod, and the other end of the height adjusting unit is fixed on the upper horizontal rod so that the horizontal rod moves along the vertical rod; each vertical rod is provided with the height adjusting unit.

[0014] Further, the height adjusting unit comprises a fixing member, a supporting member and an extension assembly, the fixing member is mounted on the vertical rod, the supporting member is fixed on the fixing member, one end of the extension assembly is fixed on the supporting member, and the other end of the extension assembly is fixed on the horizontal rod.

[0015] The vehicle axle segment model aerodynamic force testing device provided by the application is characterized in that: degree plates are arranged on the mounting assemblies above and below the frame, and a connecting unit is fixedly connected through the degree plates; the first force balance and the second force balance are fixed on the connecting unit; the bridge model is connected with the first force balance at two ends, and the train model is connected with the second force balance at two ends; the degree plates above and below the frame can rotate synchronously, and drive the connecting unit and the first force balance and the second force balance fixed thereon to rotate, so as to drive the bridge model and the train model to rotate to a suitable wind attack angle for wind tunnel test. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 FIG. 1 is a structural schematic diagram of a vehicle axle segment model aerodynamic force testing device in the embodiments of the present application (the mounting assembly above is omitted);

[0018] Figure 2 FIG. 2 is a structural schematic diagram of a mounting plate in the embodiments of the present application; Figure 1 FIG. 3 is a connection structural schematic diagram of the mounting plate, the degree plate and the connecting unit in the embodiments of the present application;

[0019] Figure 3 FIG. 4 is a structural schematic diagram of a height adjusting unit in the embodiments of the present application. Figure 1

[0020] Reference signs:

[0021] 1, frame;

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

[0023] 2, mounting assembly; 21, mounting plate; 22, mounting rod;

[0024] 3, degree plate;

[0025] 4, connecting unit;

[0026] 411, connecting plate; 412, center shaft; 413, fixing plate;

[0027] 42, first fixing rod; 43, second fixing rod; 44, sliding rod;

[0028] ​5, first load cell; 6, second load cell; 7, bridge model; 8, train model; 9, end plate. DETAILED DESCRIPTION

[0029] In order to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] It should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or indirectly disposed 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", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise explicitly specified.

[0033] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, to enable those skilled in the art to understand and read, and do not have technical significance, and any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0034] The embodiment of the present application provides a kind of axle segment model aerodynamic force testing device, including two frames 1 of relative arrangement, installation component 2, index plate 3, connecting unit 4 and first force balance 5, second force balance 6, installation component 2 is respectively arranged in upper and lower between two frames 1, two installation components 2 are respectively rotationally arranged with index plate 3, index plate 3 is respectively fixedly connected with a connecting unit 4, first force balance 5 and second force balance 6 are all installed on two connecting units 4;Axle segment model is placed between two connecting units 4, the both ends of bridge model 7 are fixedly connected with first force balance 5, the both ends of train model 8 are fixedly connected with second force balance 6;Index plate 3 drives axle segment model to rotate to change wind attack angle.

[0035] In the embodiment of the present application, index plate 3 is fixedly connected with a connecting unit 4, and first force balance 5 and second force balance 6 are respectively fixed on the connecting unit 4;The axle segment model connected with force balance is rotated by using index plate 3, which can accurately control the position of the axle segment model, thereby facilitating the simulation of test conditions of any wind attack angle.Specifically, the installation component 2 on the upper and lower of frame 1 is rotationally arranged with index plate 3, and the connecting unit 4 is fixedly connected on the two index plates 3, and the axle segment model is installed between the two connecting units 4.The two index plates 3 can be controlled to rotate synchronously by program, so that the axle segment model rotates between the two installation components 2 to adjust different angle positions.

[0036] In the embodiment of the present application, the installation component 2 is rotationally arranged with index plate 3, and the installation component 2 is arranged between the two frames 1, which can be a plate structure or a rod structure, and the structure is not limited.The connecting unit 4 is fixedly connected with the index plate 3, and rotates under the driving of the index plate 3, and the first force balance 5 and the second force balance 6 are respectively arranged according to the positions of the bridge model 7 and the train model 8.

[0037] The axle segment model aerodynamic force testing device of the embodiment of the present application is arranged with index plate 3 on the installation component 2 on the upper and lower of frame 1, and the connecting unit 4 is fixedly connected by index plate 3, and the first force balance 5 and the second force balance 6 are fixed on the connecting unit 4, and the both ends of the bridge model 7 are connected with the first force balance 5, and the both ends of the train model 8 are connected with the second force balance 6;The index plates 3 on the upper and lower of frame 1 can realize synchronous rotation, and drive the connecting unit 4 and the first force balance 5 and the second force balance 6 fixed thereon to rotate, so as to drive the bridge model 7 and the train model 8 to rotate to the appropriate wind attack angle for wind tunnel test.The above-mentioned aerodynamic force testing device is simple to install, convenient to operate, and improves the test efficiency.

[0038] In some embodiments, the connecting unit 4 comprises a center connecting piece, a first fixed rod 42, a second fixed rod 43 and a sliding rod 44. The center connecting piece is mounted on the index disc 3. The first fixed rod 42 is fixed on the center connecting piece. The second fixed rod 43 is arranged in parallel and at intervals with the first fixed rod 42. The sliding rod 44 is slidably sleeved on the first fixed rod 42 and the second fixed rod 43, respectively. The first force balance 5 is fixed on the top end of the center connecting piece. The second force balance 6 is slidably mounted on the sliding rod 44.

[0039] With reference to Figure 2 In the embodiments of the present application, the first fixed rod 42, the second fixed rod 43 and the sliding rod 44 are directly or indirectly fixed on the index disc 3 through the center connecting piece, so as to rotate under the driving of the index disc 3. The first fixed rod 42, the second fixed rod 43 and the sliding rod 44 can all be aluminum profiles with sliding grooves. The sliding rod 44 is slidably sleeved on the first fixed rod 42 and the second fixed rod 43. The second force balance 6 is slidably mounted on the sliding rod 44, so that the second force balance 6 can slide in the direction along the first fixed rod 42 and in the direction perpendicular to the first fixed rod 42, thereby adapting to the test working conditions of the train model 8 in different positions. The second force balance 6 can move on the sliding rod 44 through a connecting piece. The connecting piece can move on the sliding rod 44.

[0040] The second force balance 6 is connected with the train model 8, so as to measure the force conditions of the train model 8 under different wind attack angles in different positions. The second force balance 6 can also be installed in multiple numbers, so as to be applicable to the case that there are multiple train tracks on the bridge. The first force balance 5 is fixed on the top end of the center connecting piece, so as to connect the bridge model 7 to measure the force conditions of the bridge model 7 under different wind attack angles.

[0041] The aerodynamic force test device of the embodiments of the present application can make the bridge model 7 and the train model 8 rotate synchronously at different angles, so as to be applicable to test working conditions of any wind attack angle. The test efficiency is high, and the application range is wide.

[0042] In some embodiments, the center connecting piece comprises a connecting plate 411, a center shaft 412 and a fixed plate 413. The connecting plate 411 is fixed on the index disc 3. The center shaft 412 is fixed on the connecting plate 411. The fixed plate 413 is fixed on the center shaft 412. The first fixed rod 42 is fixedly connected with the fixed plate 413. In the embodiments of the present application, the connecting plate 411 is fixedly connected with the index disc 3, so as to avoid the case that the connection between the center shaft 412 and the index disc 3 is not stable. The first fixed rod 42 is fixed on the fixed plate 413, so as to avoid the case that the connection between the center shaft 412 and the first fixed rod 42 is not stable.

[0043] Further, the number of the fixing plates 413 is two, and the two fixing plates 413 are arranged in parallel at intervals; the first fixing rod 42 is fixed between the two fixing plates 413, and the first force balance 5 is fixed to the top end of the upper fixing plate 413. In the embodiment of the application, the first fixing rod 42 can be welded between the two fixing plates 413; or the end faces of the first fixing rod 42 are welded with the side end faces of the first fixing rod 42 respectively. The two fixing plates 413 are arranged, on the one hand, to facilitate the fixed connection of the first force balance 5 at the top end, and on the other hand, to reduce the weight of the entire center connecting piece, that is, to reduce the weight of the connecting unit 4, so as to facilitate the rotation of the indexing disc 3, the connecting unit 4 and the axle segment model.

[0044] In some embodiments, the number of the first fixing rod 42, the second fixing rod 43 and the sliding rod 44 is two respectively, one end of each first fixing rod 42 is fixed on the center connecting piece, and the other end is slidably connected with a sliding rod 44; the two second fixing rods 43 are arranged in parallel at intervals on the two sides of the first fixing rod 42, and the two ends of the sliding rod 44 are slidably sleeved on a second fixing rod 43, and each sliding rod 44 is slidably sleeved on a first fixing rod 42.

[0045] Referring to Figure 2 , the number of the first fixing rod 42, the second fixing rod 43 and the sliding rod 44 is two, which makes the connecting unit 4 more balanced and more stable when rotating under the driving of the indexing disc 3. The train model 8 can be arranged on the same side or both sides of the first fixing rod 42 according to actual needs. The arrangement of the two sliding rods 44 can also adapt to the bridge type with two bridge decks.

[0046] In some embodiments, the mounting assembly 2 includes a mounting plate 21 and two mounting rods 22, the two ends of the mounting rod 22 are fixed on a frame 1 respectively, and the two mounting rods 22 are arranged at intervals relative to each other; the mounting plate 21 is rotatably mounted with an indexing disc 3, and the mounting plate 21 is fixedly connected with the two mounting rods 22 respectively. Referring to Figure 1 , in the embodiment of the 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 aluminum profile with a sliding groove. The two mounting rods 22 are arranged above and below the frame 1 respectively instead of plate-shaped structure, which can increase the stability of the aerodynamic force testing device while reducing the overall weight of the testing device. The indexing disc 3 can be fixed by the mounting plate 21 with small size, and the two ends of the mounting plate 21 are fixed on the two mounting rods 22 respectively. Specifically, the indexing disc 3 is divided into two layers, the bottom layer is fixedly connected with the mounting plate 21, and the upper layer is rotatably connected with the bottom layer; the other end of the upper layer is fixedly connected with the connecting plate 411 of the center connecting piece. The indexing disc 3 can drive the center connecting piece to rotate to any accurate angle, and then be fixed at the angle by the built-in clamping groove.

[0047] In some embodiments, the vehicle axle segment model comprises the end plate 9, the bridge model 7 and the train model 8, the two ends of the bridge model 7 are fixed with the end plate 9, and the two ends of the train model 8 pass through the end plate 9 to connect the second force balance 6. In the embodiments of the application, the train model 8 is set according to actual conditions to be single-lane or multi-lane; the second force balance 6 is correspondingly arranged with the train model 8. The first force balance 5 is fixedly connected with the bridge model 7.

[0048] In some embodiments, the frame 1 comprises the rubber disc 131, the fastener 132, the two horizontally arranged horizontal rods 12, the two vertically arranged vertical rods 11, and the adjacent horizontal rod 12 and vertical rod 11 are fixedly connected; the two ends of the vertical rod 11 are provided with the rubber disc 131, and the fastener 132 fixes the rubber disc 131 on the vertical rod 11. In the embodiments of the application, the horizontal rod 12 and the vertical rod 11 can be aluminum profiles with sliding grooves; the connection position between the horizontal rod 12 and the vertical rod 11 can be adjusted by using angle steel, so as to facilitate the construction of the support in the wind tunnel of different volumes. The rubber disc 131 can be connected with the vertical rod 11 through the connection part arranged on the rubber disc 131, the length of the connection part is designed according to actual conditions, and the fastener 132 can change the total height of the vertical rod 11 and the rubber disc 131 by adjusting the fastening position of the connection part, so as to adapt to the wind tunnel test of different sizes.

[0049] Further, the frame 1 further comprises the height adjusting unit 14, one end of the height adjusting unit 14 is fixed on the vertical rod 11, and the other end is fixed on the horizontal rod 12 above the horizontal rod 12 to move the horizontal rod 12 along the vertical rod 11; one height adjusting unit 14 is arranged on each vertical rod 11. Referring to Figure 1 After the horizontal rod 12 and the vertical rod 11 are fixedly connected to form the frame 1, the height adjusting unit 14 can finely adjust the fixed position of the horizontal rod 12 on the vertical rod 11. The height adjusting unit 14 saves labor and improves the adjustment efficiency in the test of the heavy horizontal rod 12. The height adjusting unit 14 on each vertical rod 11 is adjusted according to actual needs.

[0050] Specifically, the height adjusting unit 14 comprises the fixing part 141, the support part 142 and the telescopic assembly 143, the fixing part 141 is installed on the vertical rod 11, the support part 142 is fixed on the fixing part 141, one end of the telescopic assembly 143 is fixed on the support part 142, and the other end is fixed on the horizontal rod 12. In the embodiments of the application, the connection position of the fixing part 141 and the vertical rod 11 can be adjusted. The support part 142 is used to fix the telescopic assembly 143. The position of the fixing part 141 is determined according to actual needs during the test, so that the telescopic assembly 143 can raise or lower the height of the horizontal rod 12. The telescopic assembly 143 can be an electric telescopic rod.

[0051] The operation process of installing the axle segment model aerodynamic force testing device of the embodiment of the application in the wind tunnel is as follows: 1, the vertical rods 11, the cross rods 12 of the frame 1 and the mounting rods 22 of the mounting assembly 2 are built according to the actual required size, and the rubber discs 131 are fixed on both ends of each vertical rod 11 by the fasteners 132, and the frame 1 is fixed in the wind tunnel. 2, the telescopic assembly 143 is fixed on each vertical rod 11 by the fixing members 141 and the supporting members 142, and one end of the telescopic assembly 143 is fixedly connected with the corresponding cross rod 12. 3, according to the actual required size, the upper and lower mounting plates 21, the indexing disc 3 and the connecting unit 4 are sequentially connected and fixed, and the first force balance 5 and the second force balance 6 are fixedly installed. 4, the lower first force balance 5 is fixedly connected with the end plate 9 and the bottom end of the bridge model 7, the angle steel of the upper cross rod 12 is loosened, the position of the upper first force balance 5 is adjusted by the four electric telescopic rods, the upper first force balance 5 is fixedly connected with the top end of the bridge model 7, and then the angle steel of the cross rod 12 is fixedly connected. 5, the position of the second force balance 6 is adjusted by the sliding rod 44, the train model 8 is fixedly connected with the second force balance 6, and the position of the second force balance 6 is fixed. The aerodynamic force testing device is built by the above operation process. Figure 1

[0052] The wind direction in the wind tunnel is fixed, so the axle segment model aerodynamic force testing device of the embodiment of the application adjusts the angle of the axle segment model by synchronous rotation of the upper and lower indexing discs 3, so as to simulate different wind attack angles, and the relative position of the train model 8 and the bridge model 7 remains unchanged during the rotation. After the rotation to the required angle, the indexing disc 3 is automatically locked at the angle. When the wind tunnel test is performed, if only the wind attack angle needs to be changed, the angle of the indexing disc 3 can be adjusted by the M200 controller corresponding to the indexing disc 3 outside the wind tunnel, without the need for manual measurement of the angle in the wind tunnel, so that manpower and time are saved, and large measurement errors are avoided.

[0053] The above description of the disclosed embodiments enables one skilled in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.​

Claims

1. A vehicle axle segment model aerodynamic force testing apparatus, characterized by: The application relates to a wind tunnel test device for a vehicle bridge section model, which comprises two frames arranged oppositely, mounting assemblies, a protractor disc, connecting units and first and second force measuring balances. The vehicle bridge section model is arranged between the two connecting units, the two ends of the bridge model are fixedly connected with the first force measuring balances, and the two ends of the train model are fixedly connected with the second force measuring balances; the protractor disc drives the vehicle bridge section model to rotate so as to change the wind attack angle. The connecting unit comprises a central connecting piece, a first fixing rod, a second fixing rod and a sliding rod, the central connecting piece is arranged on the protractor disc, the first fixing rod is fixed on the central connecting piece, the second fixing rod is arranged in parallel and at intervals with the first fixing rod, and the sliding rod is slidably sleeved on the first fixing rod and the second fixing rod; the first force measuring balance is fixed on the top end of the central connecting piece, and the second force measuring balance is slidably arranged on the sliding rod. The central connecting piece comprises a connecting plate, a central shaft and a fixing plate, the connecting plate is fixed on the protractor disc, the central shaft is fixed on the connecting plate, and the fixing plate is fixed on the central shaft; the first fixing rod is fixedly connected with the fixing plate. The vehicle bridge section model comprises end plates, a bridge model and a train model, the two ends of the bridge model are fixed with the end plates, and the two ends of the train model pass through the end plates and are connected with the second force measuring balances. The frame comprises rubber discs, fasteners and two horizontally arranged horizontal rods and two vertically arranged vertical rods, the adjacent horizontal rod and vertical rod are fixedly connected; the two ends of the vertical rod are provided with the rubber discs, and the fastener is used for fixing the rubber disc on the vertical rod. The frame further comprises a height adjusting unit, one end of the height adjusting unit is fixed on the vertical rod, and the other end is fixed on the horizontal rod above the vertical rod so that the horizontal rod moves along the vertical rod; one height adjusting unit is arranged on each vertical rod.

2. The axle segment model aerodynamic force test apparatus according to claim 1, characterized by, The number of the fixing plates is two, and the two fixing plates are arranged in parallel at intervals; the first fixing rod is fixed between the two fixing plates, and the first force measuring balance is fixed on the top end of the upper fixing plate.

3. The axle segment model aerodynamic force test apparatus according to claim 1, characterized by, The number of the first fixing rod, the second fixing rod and the sliding rod is two respectively, one end of each first fixing rod is fixed on the central connecting piece, and the other end is slidably connected with the sliding rod; the two second fixing rods are arranged in parallel and at intervals on the two sides of the first fixing rod, the two ends of the sliding rod are slidably sleeved on the second fixing rod, and each sliding rod is slidably sleeved on the first fixing rod.

4. The device according to any one of claims 1 to 3, wherein The mounting assembly comprises a mounting plate and two mounting rods, the two ends of the mounting rod are fixed on the frame respectively, and the two mounting rods are arranged oppositely at intervals; the mounting plate is rotatably arranged with the protractor disc, and the mounting plate is fixedly connected with the two mounting rods.

5. The axle segment model aerodynamic force test apparatus according to claim 1, characterized by, The height adjusting unit comprises 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 horizontal rod.

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