A wind tunnel test device for rail vehicle drag reduction fairing

Abstract

The utility model discloses a kind of wind tunnel test device for rail vehicle drag-reducing fairing, belong to the technical field of fluid mechanics, its technical scheme main points include one-way drive pipe, the right side fixed connection of one-way drive pipe has one-way test pipe, the bottom of one-way drive pipe and one-way test pipe is fixedly connected with support, the inside movable connection of one-way drive pipe has wind force simulation mechanism, the inside movable connection of one-way test pipe has simulation test mechanism, can pass through main fan cooperation four groups can pass through sliding cross rail and servo motor driven linkage structure adjustment position's auxiliary fan, both make up the airflow flow direction, distribution and rate uneven problem caused by single fan, can also simulate multiple wind direction and other complex environment by changing auxiliary fan distribution state, still can confluence with main fan and enhance wind pressure, to more real reproduction drag-reducing fairing complex airflow environment in actual use, reduce the deviation of test data and actual scene.

Description

Technical Field

[0001] This utility model relates to the field of fluid mechanics technology, and in particular to a wind tunnel testing device for a drag-reducing fairing for rail vehicles. Background Technology

[0002] In the field of vehicle drag reduction optimization, drag reduction fairings need to be tested in wind tunnels to verify their performance. However, existing test equipment has problems such as poor simulation of real flow fields and insufficient drag measurement accuracy, which leads to inaccurate evaluation of drag reduction effect and restricts the research and development and improvement of fairings. Therefore, there is an urgent need for more reliable wind tunnel test equipment.

[0003] In existing technologies, traditional wind tunnel tests mostly rely on a single fan or a fixed-layout fan, which makes it difficult to reproduce the complex airflow environment faced by the drag-reducing fairing in actual use, such as multiple wind directions and turbulence. This leads to deviations between test data and actual scenarios. In addition, traditional support devices mostly only support simple fixation or translation, and cannot simulate the dynamic posture of the fairing with the carrier, such as when a vehicle is traveling with or against the wind, or climbing a slope. This makes it difficult to cover the multi-condition stress scenarios in actual use.

[0004] To address this, a wind tunnel testing device for drag-reducing fairings for rail vehicles is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a wind tunnel testing device for drag-reducing fairings of rail vehicles, which can solve the problems of uneven airflow distribution, single wind direction simulation, and limited attitude adjustment of the tested object.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind tunnel test device for a drag-reducing fairing for rail vehicles, comprising a unidirectional drive tube, a unidirectional test tube fixedly connected to the right side of the unidirectional drive tube, a bracket fixedly connected to the bottom of both the unidirectional drive tube and the unidirectional test tube, a wind simulation mechanism movably connected to the inner side of the unidirectional drive tube, and a simulation test mechanism movably connected to the inner side of the unidirectional test tube.

[0007] The wind simulation mechanism includes a main fan fixedly connected to the left side of the unidirectional drive tube, a sliding cross guide rail fixedly connected to the inner side of the unidirectional drive tube, four sliding blocks slidably connected to the right side of the inner side of the sliding cross guide rail, and the four sliding blocks are respectively set at the four corners of the sliding cross guide rail. An auxiliary fan is fixedly connected to the inner side of the sliding blocks, and an adjustment component is movably connected to the right side of the sliding cross guide rail and the auxiliary fan.

[0008] Preferably, the simulation test mechanism includes a horizontal slide rail fixedly connected to the inner side of the unidirectional test tube, a motor lead screw movably connected to the inner side of the horizontal slide rail, a threaded sleeve threadedly connected to the outer side of the motor lead screw, a support base plate fixedly connected to the outer side of the threaded sleeve, and the support base plate slidably connected to the inner side of the horizontal slide rail.

[0009] Preferably, a support plate is fixedly connected to the top of the support base plate, and an adjustment plate is rotatably connected to the top of the support plate.

[0010] Preferably, a guide slide rod is fixedly connected to the top of the support plate, a triangular protrusion is slidably connected to the outer side of the guide slide rod, an extension block is fixedly connected to the right side of the support plate, and an electronic telescopic rod is fixedly connected to the side opposite to the extension block and the triangular protrusion.

[0011] Preferably, the adjustment component includes a servo motor fixedly connected to the left side of the sliding cross guide rail, the output end of the servo motor is fixedly connected to a linkage rotating plate, and four linkage power arms are rotatably connected to the outer side of the linkage rotating plate, with the four linkage power arms distributed at the four corners of the linkage rotating plate.

[0012] Preferably, the linkage arm is rotatably connected to the left side of the auxiliary fan.

[0013] Preferably, a positioning block is fixedly connected to the top of the adjusting plate.

[0014] Preferably, a fixing bolt is bolted to the inner side of the positioning block.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This application sets up a wind simulation mechanism, which can use a main fan in conjunction with four sets of auxiliary fans whose positions can be adjusted by a linkage structure driven by sliding cross guide rails and servo motors. This not only makes up for the uneven airflow direction, distribution and speed caused by a single fan, but also simulates complex environments such as multiple wind directions by changing the distribution state of the auxiliary fans. It can also merge with the main fan to enhance wind pressure, thereby more realistically reproducing the complex airflow environment in the actual use of the drag reduction guide fairing, and reducing the deviation between the test data and the actual scene caused by the difficulty of simulating multiple wind directions and turbulence by traditional single fans or fixed layout fans.

[0017] 2. By setting up a wind test mechanism, this application allows the support base plate to slide back and forth on the horizontal slide rail via a motor screw, simulating the driving state with and against the wind. In addition, the electronic telescopic rod pushes the triangular protrusion to make the adjustment plate form a slope, which can simulate the dynamic posture when climbing. This allows the support structure to not only achieve translation, but also simulate various dynamic scenarios such as with and against the wind and climbing. This solves the problem that traditional support devices can only be simply fixed or translated and cannot cover the multiple stress scenarios in actual use, and more comprehensively reproduces the actual stress state of the fairing. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the wind tunnel testing device for drag-reducing fairings of rail vehicles according to this utility model.

[0019] Figure 2 This is an internal structural diagram of the wind tunnel test device for drag reduction fairing of rail vehicles according to this utility model.

[0020] Figure 3 This is an overall structural diagram of the wind power simulation mechanism of this utility model;

[0021] Figure 4 This is an overall structural diagram of the simulation test mechanism of this utility model;

[0022] Figure 5 This is a partial structural diagram of the support plate of this utility model.

[0023] In the diagram, 1. One-way drive tube; 2. One-way test tube; 3. Support; 4. Wind simulation mechanism; 41. Main fan; 42. Sliding cross rail; 43. Sliding block; 44. Auxiliary fan; 45. Adjustment component; 45a. Servo motor; 45b. Linkage rotating plate; 45c. Linkage power arm; 5. Simulation test mechanism; 51. Horizontal slide rail; 52. Motor lead screw; 53. Threaded sleeve; 54. Support base plate; 55. Support plate; 56. Adjustment plate; 57. Guide slide rod; 58. Triangular protrusion; 59. Extension block; 510. Electronic telescopic rod; 6. Positioning block; 7. Fixing bolt. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 The present invention provides the following technical solution:

[0026] A wind tunnel test device for a drag-reducing fairing for rail vehicles includes a unidirectional drive tube 1, a unidirectional test tube 2 fixedly connected to the right side of the unidirectional drive tube 1, a bracket 3 fixedly connected to the bottom of both the unidirectional drive tube 1 and the unidirectional test tube 2, a wind simulation mechanism 4 movably connected to the inner side of the unidirectional drive tube 1, and a simulation test mechanism 5 movably connected to the inner side of the unidirectional test tube 2.

[0027] The wind simulation mechanism 4 includes a main fan 41 fixedly connected to the left side of the unidirectional drive pipe 1, a sliding cross guide rail 42 fixedly connected to the inner side of the unidirectional drive pipe 1, four sliding blocks 43 slidably connected to the right side of the inner side of the sliding cross guide rail 42, and the four sliding blocks 43 are respectively set at the four corners of the sliding cross guide rail 42. An auxiliary fan 44 is fixedly connected to the inner side of the sliding blocks 43, and an adjustment component 45 is movably connected to the right side of the sliding cross guide rail 42 and the auxiliary fan 44.

[0028] In this embodiment: a wind tunnel test is conducted by activating the main fan 41 inside the unidirectional drive pipe 1. The unidirectional drive pipe 1 and the unidirectional test pipe 2 are connected and distributed in one direction to form a unidirectional detection environment. The main fan 41 generates directional wind to blow the drag-reducing guide shroud under test. Four sets of auxiliary fans 44, supported by sliding blocks 43 inside the sliding cross guide rail 42, are located near the inner walls of the four corners of the unidirectional drive pipe 1 to compensate for the uneven flow direction, distribution, and speed of the wind, making the wind more uniform and covering the detection path. By adjusting the component 45 to change the distribution of the auxiliary fans 44, their wind can merge with the main fan 41 or simulate other wind directions. When the center position is reached, the merging generates a large directional wind, enhancing the realism of the wind field simulation.

[0029] Specifically, such as Figure 2 , Figure 4 , Figure 5 As shown, the simulation test mechanism 5 includes a horizontal slide rail 51 fixedly connected to the inner side of the unidirectional test tube 2. A motor lead screw 52 is movably connected to the inner side of the horizontal slide rail 51. A threaded sleeve 53 is threadedly connected to the outer side of the motor lead screw 52. A support base plate 54 is fixedly connected to the outer side of the threaded sleeve 53. The support base plate 54 is slidably connected to the inner side of the horizontal slide rail 51.

[0030] Specifically, such as Figure 2 , Figure 4 , Figure 5 As shown, a support plate 55 is fixedly connected to the top of the support base plate 54, and an adjustment plate 56 is rotatably connected to the top of the support plate 55.

[0031] Specifically, such as Figure 2 , Figure 4 , Figure 5 As shown, a guide slide rod 57 is fixedly connected to the top of the support plate 55, a triangular protrusion 58 is slidably connected to the outside of the guide slide rod 57, an extension block 59 is fixedly connected to the right side of the support plate 55, and an electronic telescopic rod 510 is fixedly connected to the side opposite to the extension block 59 and the triangular protrusion 58.

[0032] In this embodiment: the wind enters the one-way test tube 2 and blows against the guide fairing for testing. The support base plate 54 slides back and forth along the horizontal slide rail 51 under the drive of the motor screw 52 via the built-in threaded sleeve 53 to simulate driving with and against the wind. Activating the electronic telescopic rod 510 on the right side of the support plate 55 can push the triangular protrusion 58 to slide between the support plate 55 and the adjustment plate 56, squeezing the adjustment plate 56 to rotate upward along the support plate 55 to form a slope, thereby driving the guide fairing to simulate climbing a slope and facing away from or towards the wind, thus simulating the actual use environment.

[0033] Specifically, such as Figure 3 As shown, the adjustment component 45 includes a servo motor 45a fixedly connected to the left side of the sliding cross guide rail 42. The output end of the servo motor 45a is fixedly connected to a linkage rotating plate 45b. Four linkage power arms 45c are rotatably connected to the outside of the linkage rotating plate 45b, and the four linkage power arms 45c are distributed at the four corners of the linkage rotating plate 45b.

[0034] Specifically, such as Figure 3 As shown, the linkage arm 45c is rotatably connected to the left side of the auxiliary fan 44.

[0035] In this embodiment: by starting the servo motor 45a, the linkage plate 45b at its output end can be rotated. The linkage arms 45c at the four corners of the linkage plate 45b are rotatably connected to the outer shell of the auxiliary fan 44 at the other end, which will pull the four auxiliary fans 44, causing the sliding blocks 43 that carry them to slide inward simultaneously in the sliding cross guide rail 42 to adjust the distribution.

[0036] Specifically, such as Figure 5 As shown, a positioning block 6 is fixedly connected to the top of the adjusting plate 56.

[0037] Specifically, such as Figure 5 As shown, a fixing bolt 7 is bolted to the inner side of the positioning block 6.

[0038] In this embodiment: the flow guide is fixed to the inside of the unidirectional test tube 2 by means of the fixed structure and the cooperation of the positioning block 6 and the fixing bolt 7.

[0039] Working principle: Before conducting wind tunnel testing on the fairing, the fairing to be tested is removed and fixed inside the unidirectional test tube 2 using a fixing structure and positioning block 6 and fixing bolt 7. The main fan 41 inside the unidirectional drive tube 1 is then started for wind tunnel testing. Since the unidirectional drive tube 1 and unidirectional test tube 2 are connected and unidirectionally distributed, a unidirectional testing environment is formed. Driven by the main fan 41, directional airflow is generated within the overall unidirectional testing environment to blow and test the drag-reducing fairing to be tested. To further compensate for the uneven airflow direction, distribution, and velocity within the unidirectional testing environment caused by a single main fan 41, a sliding mechanism is installed in front of the main fan 41. The sliding block 43 inside the moving cross guide rail 42 supports four sets of auxiliary fans 44, which are distributed in the area near the four corners of the inner wall of the unidirectional drive pipe 1. This supplements the unidirectional airflow, further homogenizes it, and covers the entire detection path, thereby improving the realism of the simulation test. To further simulate the real environment, the distribution of the four auxiliary fans 44 can be changed to make their driving airflow merge with the main fan 41, or to simulate other wind direction environments. By starting the servo motor 45a, the linkage plate 45b located at the output end of the servo motor 45a can rotate. The four corners of the linkage plate 45b are connected to the linkage power arm 45c, and the other end of the linkage power arm 45c... All are rotatably connected to the outer casing of the auxiliary fan 44. Therefore, when the linkage plate 45b rotates, it will pull the four auxiliary fans 44 through the linkage arm 45c, so that the sliding block 43 supporting it can slide inward simultaneously inside the sliding cross guide rail 42 to adjust the distribution. It no longer only optimizes the airflow distribution, but also simulates other wind direction conditions. Moreover, when in the center position, it can merge with the main fan 41 to generate a large directional wind. Thus, by simulating the real environment and increasing the wind pressure, it further enhances the realism of the wind field simulation. Secondly, in the unidirectional test tube 2, after the detection wind enters, it will blow and test the guide shroud. The overall support structure at the bottom of the guide shroud is supported by the support base plate 54. 4. Through its built-in threaded sleeve 53, driven by the motor screw 52, ​​it can slide back and forth inside the horizontal slide rail 51 to simulate the state of driving with the wind and against the wind. Secondly, by activating the electronic telescopic rod 510 on the right side of the support plate 55, the electronic telescopic rod 510 extends and pushes the triangular protrusion 58 to slide between the support plate 55 and the adjusting plate 56, and squeezes the adjusting plate 56 to rotate upward along the support plate 55 to form a slope, thereby driving the guide fairing to simulate the state of climbing and facing the wind, thus simulating the actual use environment. In summary, by controlling the air supply mode and adjusting the detection state, the wind tunnel test device of the drag reduction guide fairing is optimized.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wind tunnel testing apparatus for a drag-reducing fairing for rail vehicles, comprising a unidirectional drive tube (1), characterized in that: A one-way test tube (2) is fixedly connected to the right side of the one-way drive tube (1). A bracket (3) is fixedly connected to the bottom of both the one-way drive tube (1) and the one-way test tube (2). A wind simulation mechanism (4) is movably connected to the inner side of the one-way drive tube (1). A simulation test mechanism (5) is movably connected to the inner side of the one-way test tube (2). The wind simulation mechanism (4) includes a main fan (41) fixedly connected to the left side of the unidirectional drive pipe (1). A sliding cross guide rail (42) is fixedly connected to the inner side of the unidirectional drive pipe (1). Four sliding blocks (43) are slidably connected to the right side of the inner side of the sliding cross guide rail (42), and the four sliding blocks (43) are respectively set at the four corners of the sliding cross guide rail (42). An auxiliary fan (44) is fixedly connected to the inner side of the sliding block (43). An adjustment component (45) is movably connected to the right side of the sliding cross guide rail (42) and the auxiliary fan (44).

2. The wind tunnel testing apparatus for a drag-reducing fairing for rail vehicles according to claim 1, characterized in that: The simulation test mechanism (5) includes a horizontal slide rail (51) fixedly connected to the inside of the unidirectional test tube (2). A motor lead screw (52) is movably connected to the inside of the horizontal slide rail (51). A threaded sleeve (53) is threadedly connected to the outside of the motor lead screw (52). A support base plate (54) is fixedly connected to the outside of the threaded sleeve (53). The support base plate (54) is slidably connected to the inside of the horizontal slide rail (51).

3. The wind tunnel testing apparatus for a drag-reducing fairing for rail vehicles according to claim 2, characterized in that: A support plate (55) is fixedly connected to the top of the support base plate (54), and an adjustment plate (56) is rotatably connected to the top of the support plate (55).

4. The wind tunnel testing apparatus for a drag-reducing fairing for rail vehicles according to claim 3, characterized in that: A guide slide rod (57) is fixedly connected to the top of the support plate (55), a triangular protrusion (58) is slidably connected to the outside of the guide slide rod (57), an extension block (59) is fixedly connected to the right side of the support plate (55), and an electronic telescopic rod (510) is fixedly connected to the side opposite to the extension block (59) and the triangular protrusion (58).

5. A wind tunnel testing apparatus for a drag-reducing fairing for rail vehicles according to claim 1, characterized in that: The adjustment assembly (45) includes a servo motor (45a) fixedly connected to the left side of the sliding cross rail (42). The output end of the servo motor (45a) is fixedly connected to a linkage rotating plate (45b). Four linkage power arms (45c) are rotatably connected to the outside of the linkage rotating plate (45b), and the four linkage power arms (45c) are distributed at the four corners of the linkage rotating plate (45b).

6. A wind tunnel testing apparatus for a drag-reducing fairing for rail vehicles according to claim 5, characterized in that: The power arm (45c) is rotatably connected to the left side of the auxiliary fan (44).

7. A wind tunnel testing apparatus for a drag-reducing fairing for rail vehicles according to claim 3, characterized in that: A positioning block (6) is fixedly connected to the top of the adjusting plate (56).

8. A wind tunnel testing apparatus for a drag-reducing fairing for rail vehicles according to claim 7, characterized in that: The positioning block (6) is bolted with a fixing bolt (7) on its inner side.

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