Sand dust environment simulation device

Abstract

The invention belongs to the field of wind tunnel tests, and particularly relates to a sand and dust environment simulation device. Comprising a wind tunnel system, a sand dust system and a sand dust filtering and recycling system. The wind tunnel system comprises a vertical direct-current wind tunnel, a fan, a test section and a honeycomb; the sand dust filtering and recycling system comprises a fine filtering cloth net, an electronic electrode, a thin magnetic plate, a net-shaped steel structure bearing floor, a fine filtering steel net, a filtering net and an electrostatic adsorption device. A vertical direct-current wind tunnel mode is adopted, a fan serves as a power source, sand and dust in the cabin body are driven to move, and the ground surface sand and dust environment is simulated; a sand dust filtering and recycling system is used for filtering sand dust; the thin magnetic plate vibrates in real time by utilizing the characteristic of rapid switching of positive and negative electrodes of the electronic electrode, and sand dust attached to the filter screen is shaken to the ground; and capturing escaped particles by using an electrostatic adsorption device. The problem that an existing environment simulation device is difficult to simulate the wind and sand environment of a wind tunnel with high wind speed and large sand dust diameter range span is solved.

Description

Technical Field

[0001] The invention belongs to the field of wind tunnel tests, and in particular relates to a sand and dust environment simulation device. Background Art

[0002] With the increase in extreme environments around the world and the frequency of aircraft encountering sand and dust environments, research institutions at home and abroad are paying more and more attention to the adaptability of aircraft in sand and dust environments. For example, when a fixed-wing aircraft is flying at low altitude near the ground, sand and dust are sucked into the nacelle, which will cause the power system to lose power faster and the engine to fail, which may have serious consequences; during the take-off and landing of a rotorcraft in a sand and dust environment, under the action of the airflow under the rotor, foreign matter such as sand and dust on the ground will be sucked into the air inlet, causing blockage, reducing engine performance and reliability, and causing safety accidents. Existing sand and dust environment simulation devices are difficult to simulate wind tunnel wind and sand environments with high wind speeds and a large range of sand and dust diameters. Therefore, it is necessary to conduct extensive research on the adaptability of aircraft to sand and dust environments in extreme environments by constructing extreme environments. Summary of the invention

[0003] In order to solve the problem that the existing environment simulation device is difficult to simulate the wind tunnel wind and sand environment with high wind speed and a large sand and dust diameter range, the present invention provides a sand and dust environment simulation device.

[0004] The technical solution adopted by the present invention is as follows: a sand and dust environment simulation device, including a wind tunnel system, a sand and dust system and a sand and dust filtering and recovery system;

[0005] The wind tunnel system includes a vertical DC wind tunnel, a fan, an annular sandblasting device and a honeycomb;

[0006] The vertical direct current wind tunnel is composed of a power section and a test section connected up and down, and the fan is arranged on the top of the power section; the honeycomb is installed in the test section and is located at the entrance of the test section, and the annular sandblasting device is installed in the test section and is located downstream of the honeycomb;

[0007] The sand and dust system is connected to the annular sand blasting device and provides sand and dust particles. The annular sand blasting device scatters sand and dust in a manner along the airflow. The sand and dust filtering and recovery system is connected to the test section.

[0008] The sand and dust filtering and recycling system comprises a fine filter cloth net, an electronic electrode, a thin magnetic plate, a mesh steel structure bearing floor, a fine filter steel net, a filter net, and an electrostatic adsorption device;

[0009] One end of the fine filter cloth is connected to the test section, and the other end of the fine filter cloth is connected to one end of the filter net; the other end of the filter net is connected to the mesh steel structure load-bearing floor;

[0010] The fine filter cloth net is provided with a mounting hole, the end of the test section is placed in the mounting hole, the bottom surface of the fine filter cloth net is connected to the upper end of the filter net, the lower end of the filter net passes through the fine filter steel net and is connected to the mesh steel structure bearing floor, the lower end of the electronic electrode passes through the fine filter steel net and is connected to the mesh steel structure bearing floor, the thin magnetic plate is installed on the inner side of the filter net and fits with the filter net, the fine filter steel net is connected to the mesh steel structure bearing floor; the electronic electrode includes an inner electronic electrode and an outer electronic electrode, the outer electronic electrode is installed on the outer side of the filter net, and the inner electronic electrode is installed on the inner side of the thin magnetic plate; the electrostatic adsorption device is mounted on the outer side of the outer electronic electrode, and the lower end of the electrostatic adsorption device is vertically connected to the mesh steel structure bearing floor.

[0011] Furthermore, the filter screen and the thin magnetic plate are connected to the mesh steel structure load-bearing floor flange through a built-in steel structure.

[0012] Furthermore, the electrostatic adsorption device is connected to the mesh steel structure load-bearing floor flange.

[0013] Further, the sand and dust system includes an air compressor, a filter dryer, a buffer tank, a high-pressure gas storage tank and a high-precision flow scale;

[0014] The air compressor is connected to the filter dryer, the filter dryer is connected to the buffer tank, the buffer tank is connected to the high-pressure gas storage tank, the high-pressure gas storage tank is connected to the high-precision flow scale, and the high-precision flow scale is connected to the annular sandblasting device.

[0015] Beneficial effects of this application:

[0016] This application solves the problem that existing environmental simulation devices are difficult to simulate wind tunnel wind and sand environments with high wind speeds and a large dust diameter range. It can construct extreme environments and conduct extensive research on the adaptability of aircraft to dust environments in extreme environments. It can provide sufficient basic data support for the research and development of aircraft, improve the reliability and safety of aircraft in extreme environments and at all stages of their entire life cycle, and improve test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a sand and dust environment simulation device;

[0018] Figure 2 This is a structural diagram of the sand and dust filtration and recovery system.

[0019] In the figure: 1. Vertical DC wind tunnel, 2. Fan, 3. Annular sandblasting device, 4. High-precision flow scale, 5. High-pressure gas storage tank, 6. Buffer tank, 7. Filter dryer, 8. Air compressor, 9. Electronic electrode, 10. Thin magnetic plate, 11. Mesh steel structure bearing floor, 12. Fine filter steel mesh, 13. Filter mesh, 14. Electrostatic adsorption device, 15. Fine filter cloth mesh, 16. Test section, 17. Honeycomb. DETAILED DESCRIPTION

[0020] The following will be combined with the attached Figure 1 , Attachment Figure 2 The present application is described in detail, but it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present application. In addition, in the following description, the description of the structure and technical common knowledge is omitted to avoid unnecessary confusion of the concept of the present application.

[0021] Embodiment 1:

[0022] The present application discloses a sand and dust environment simulation device, including a wind tunnel system, a sand and dust system and a sand and dust filtering and recovery system;

[0023] The wind tunnel system comprises a vertical DC wind tunnel 1, a fan 2, an annular sandblasting device 3 and a honeycomb 17;

[0024] The vertical direct current wind tunnel 1 is composed of a power section and a test section 16 connected up and down, and the fan 2 is arranged on the top of the power section; the honeycomb 17 is installed in the test section 16 and is located at the entrance of the test section, and the annular sandblasting device 3 is installed in the test section 16 and is located downstream of the honeycomb 17;

[0025] The sand and dust system is connected to the annular sand blasting device 3 and provides sand and dust particles. The annular sand blasting device 3 scatters sand and dust in a manner along the airflow. The sand and dust filtering and recovery system is connected to the test section 16.

[0026] The sand and dust filtering and recycling system comprises a fine filter cloth net 15, an electronic electrode 9, a thin magnetic plate 10, a mesh steel structure bearing floor 11, a fine filter steel net 12, a filter net 13, and an electrostatic adsorption device 14;

[0027] One end of the fine filter cloth net 15 is connected to the test section 16, and the other end of the fine filter cloth net 15 is connected to one end of the filter net 13; the other end of the filter net 13 is connected to the mesh steel structure bearing floor 11;

[0028] The fine filter cloth mesh 15 is provided with a mounting hole, the end of the test section 16 is placed in the mounting hole, the bottom surface of the fine filter cloth mesh 15 is connected to the upper end of the filter mesh 13, the lower end of the filter mesh 13 passes through the fine filter steel mesh 12 and is connected to the mesh steel structure bearing floor 11, the lower end of the electronic electrode 9 passes through the fine filter steel mesh 12 and is connected to the mesh steel structure bearing floor 11, the thin magnetic plate 10 is installed on the inner side of the filter mesh 13 and fits with the filter mesh 13, the fine filter steel mesh 12 is connected to the mesh steel structure bearing floor 11; the electronic electrode 9 includes an inner layer electronic electrode and an outer layer electronic electrode, the outer layer electronic electrode is installed on the outer side of the filter mesh 13, and the inner layer electronic electrode is installed on the inner side of the thin magnetic plate 10; the electrostatic adsorption device 14 is mounted on the outer side of the outer layer electronic electrode, and the lower end of the electrostatic adsorption device 14 is vertically connected to the mesh steel structure bearing floor 11.

[0029] Furthermore, the filter screen 13 and the thin magnetic plate 10 are flange-connected to the mesh steel structure bearing floor 11 through an internal steel structure.

[0030] Furthermore, the electrostatic adsorption device 14 is flange-connected to the mesh steel structure bearing floor 11 .

[0031] Further, the sand and dust system includes an air compressor 8, a filter dryer 7, a buffer tank 6, a high-pressure gas storage tank 5 and a high-precision flow scale 4;

[0032] The air compressor 8 is connected to the filter dryer 7, the filter dryer 7 is connected to the buffer tank 6, the buffer tank 6 is connected to the high-pressure gas storage tank 5, the high-pressure gas storage tank 5 is connected to the high-precision flow scale 4, and the high-precision flow scale 4 is connected to the annular sandblasting device 3.

[0033] The simulated environment that can be realized in this embodiment is: 1. Earth surface air environment; 2. Normal pressure in the wind tunnel; 3. Wind speed is continuously adjustable within 30m / s to 100m / s; 4. Dust particle size range is 1μm to 1000μm, and concentration range is 0.1g / m 3 ~2.2g / m 3 ; 5. Continuous test time: 1 hour to 6 hours.

[0034] Working principle and process:

[0035] This application adopts a vertical DC wind tunnel method, with a fan as the power source, to drive the movement of sand and dust in the wind tunnel, simulating the surface sand and dust environment; a sand and dust filtration and recovery system is used to filter the sand and dust; at the same time, during the test, the characteristics of the rapid switching of the positive and negative poles of the electronic electrode are used to make the thin magnetic plate vibrate in real time, shaking the sand and dust attached to the filter net to the ground; and an electrostatic adsorption device is used to capture the escaped particles.

[0036] Fan 2 is the power source of the wind tunnel. It controls the rotation speed of the fan blades to simulate different wind speeds in the test section under low pressure. The sand and dust system controls the amount of sand and dust entering the wind tunnel to achieve different sand and dust concentrations under different working conditions. The annular sandblasting device 3 takes the axis of the test section of the vertical DC wind tunnel 1 as the reference, and has sandblasting nozzles evenly distributed in an annular shape. The sand and dust sprayed from the nozzles overlap each other in a cone shape and flow with the airflow in the tunnel, thereby forming a relatively uniform sand and dust airflow at the test section.

[0037] The sand and dust filtration and recovery system is connected to the test section 16 to intercept most of the sand and dust particles. The airflow is first ejected from the test section 16 and reaches the fine filter steel mesh 12. Most of the sand and dust particles are deposited on the fine filter steel mesh 12; the remaining sand and dust particles are attached to the filter mesh 13 with the airflow. The thin magnetic plate 10 is vibrated in real time by using the characteristics of rapid switching of the positive and negative poles of the electronic electrode 9 to shake the sand and dust attached to the filter mesh 13 to the ground; the escaped particles are captured by the electrostatic adsorption device 14.

[0038] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anything within the technical concept disclosed in the present application, and any simple replacement or change based on the technical solution of the present application, shall fall within the protection scope of the present application.

Claims

1. A sand and dust environment simulation device, characterized in that: Including wind tunnel system, sand and dust system and sand and dust filtration and recovery system; The wind tunnel system comprises a vertical direct current wind tunnel (1), a fan (2), an annular sandblasting device (3) and a honeycomb (17); The vertical direct current wind tunnel (1) is composed of a power section and a test section (16) connected up and down, and the fan (2) is arranged on the top of the power section; the honeycomb (17) is installed in the test section (16) and is located at the entrance of the test section; the annular sandblasting device (3) is installed in the test section (16) and is located downstream of the honeycomb (17); The sand and dust system is connected to the annular sand blasting device (3) and provides sand and dust particles. The annular sand blasting device (3) scatters sand and dust in a manner along the airflow. The sand and dust filtering and recovery system is connected to the test section (16); The sand and dust filtering and recovery system comprises a fine filter cloth net (15), an electronic electrode (9), a thin magnetic plate (10), a mesh steel structure bearing floor (11), a fine filter steel net (12), a filter net (13), and an electrostatic adsorption device (14); One end of the fine filter cloth net (15) is connected to the test section (16), and the other end of the fine filter cloth net (15) is connected to one end of the filter net (13); the other end of the filter net (13) is connected to the mesh steel structure bearing floor (11); The fine filter cloth net (15) is provided with a mounting hole, the end of the test section (16) is placed in the mounting hole, the bottom surface of the fine filter cloth net (15) is connected to the upper end of the filter net (13), the lower end of the filter net (13) passes through the fine filter steel net (12) and is connected to the mesh steel structure bearing floor (11), the lower end of the electronic electrode (9) passes through the fine filter steel net (12) and is connected to the mesh steel structure bearing floor (11), and the thin magnetic plate (10) is installed on the inner side of the filter net (13). The fine filter steel mesh (12) is connected to the mesh steel structure bearing floor (11); the electronic electrode (9) comprises an inner electronic electrode and an outer electronic electrode, the outer electronic electrode is installed on the outside of the filter mesh (13), and the inner electronic electrode is installed on the inside of the thin magnetic plate (10); the electrostatic adsorption device (14) is mounted on the outside of the outer electronic electrode, and the lower end of the electrostatic adsorption device (14) is vertically connected to the mesh steel structure bearing floor (11).

2. The sand and dust environment simulation device according to claim 1, characterized in that: The filter screen (13) and the thin magnetic plate (10) are flange-connected to a mesh steel structure bearing floor (11) via an internal steel structure.

3. The sand and dust environment simulation device according to claim 2, characterized in that: The electrostatic adsorption device (14) is flange-connected to the mesh steel structure load-bearing floor (11).

4. The sand and dust environment simulation device according to claim 3, characterized in that: The sand and dust system comprises an air compressor (8), a filter dryer (7), a buffer tank (6), a high-pressure gas storage tank (5) and a high-precision flow scale (4); The air compressor (8) is connected to the filter dryer (7), the filter dryer (7) is connected to the buffer tank (6), the buffer tank (6) is connected to the high-pressure gas storage tank (5), the high-pressure gas storage tank (5) is connected to the high-precision flow scale (4), and the high-precision flow scale (4) is connected to the annular sandblasting device (3).

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