A sand and dust environment simulation device

Abstract

This application belongs to the field of wind tunnel tests, and specifically relates to a sand and dust environment simulation device. It includes a wind tunnel system, a sand and dust system, and a sand and dust filtration and recovery system; the wind tunnel system includes a vertical direct-current wind tunnel, a fan, a test section, and a honeycomb device; the sand and dust filtration and recovery system includes a fine filtration cloth net, an electronic electrode, a thin magnetic plate, a mesh steel structure bearing floor, a fine filtration steel net, a filter net, and an electrostatic adsorption device. This application uses the method of a vertical direct-current wind tunnel, with the fan as the power source, to drive the movement of sand and dust in the chamber to simulate the surface sand and dust environment; a sand and dust filtration and recovery system is used to filter the sand and dust; 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 onto the ground; an electrostatic adsorption device is used to capture the escaped particles. It solves the problem that the existing environment simulation device is difficult to simulate the wind tunnel wind and sand environment with high wind speeds and a large span of sand and dust diameter ranges.

Description

Technical Field

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

[0002] When a fixed-wing aircraft flies at low altitude near the ground, sand and dust are sucked into the nacelle, which will cause the power system to lose power faster, resulting in engine failure problems and possibly causing serious consequences; during the takeoff and landing process of a rotary-wing aircraft in a sand and dust environment, under the action of the airflow under the rotor, foreign objects such as ground sand and dust will be sucked into the intake duct, causing blockage to it, reducing the engine performance and reliability, and causing safety accidents. Existing sand and dust environment simulation devices are difficult to simulate the wind tunnel wind and sand environment with high wind speeds and a large span of sand and dust diameter ranges. Therefore, it is necessary to construct an extreme environment and conduct extensive research on the adaptability of aircraft to the sand and dust environment under extreme conditions. Summary of the Invention

[0003] In order to solve the problem that existing environment simulation devices are difficult to simulate the wind tunnel wind and sand environment with high wind speeds and a large span of sand and dust diameter ranges, 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 includes a wind tunnel system, a sand and dust system, and a sand and dust filtration and recovery system;

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

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

[0007] The sand and dust system is connected to the annular sandblasting device and provides sand and dust particles. The annular sandblasting device spreads the sand and dust in the direction of the airflow. The sand and dust filtration and recovery system is connected to the test section;

[0008] The sand and dust filtration and recovery system includes a fine filter cloth net, an electronic electrode, a thin magnetic plate, a mesh steel structure load-bearing floor, a fine filter steel net, a filter net, and an electrostatic adsorption device;

[0009] One end of the fine filter cloth net is connected to the test section, and the other end of the fine filter cloth net 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 is provided with mounting holes, the end of the test section is placed in the mounting holes, the bottom surface of the fine filter cloth 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, and the fine filter steel net is connected to the mesh steel structure bearing floor; the electronic electrode 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 net, and the inner layer electronic electrode is installed on the inner side of the thin magnetic plate; the electrostatic adsorption device is sleeved on the outer side of the outer layer electronic electrode, and the lower end of the electrostatic adsorption device is vertically connected to the mesh steel structure bearing floor.

[0011] Further, the filter net and the thin magnetic plate are flange-connected to the mesh steel structure bearing floor through an internal steel structure.

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

[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] Advantages of the present application:

[0016] The present application solves the problem that the existing environmental simulation device is difficult to simulate the wind tunnel wind and sand environment with high wind speed and large sand and dust diameter range span, can construct an extreme environment, conduct extensive research on the adaptability of the aircraft to the sand and dust environment under the extreme environment, can provide sufficient basic data support for the research and development of the aircraft, improves the reliability and safety of the aircraft in each stage under the extreme environment and the full life cycle, and improves the test efficiency. Description of the Drawings

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

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

[0019] In the figure: 1. Vertical DC wind tunnel, 2. Fan, 3. Ring-shaped 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 load-bearing floor, 12. Fine filter steel mesh, 13. Filter net, 14. Electrostatic adsorption device, 15. Fine filter cloth net, 16. Test section, 17. Honeycomb device. Detailed implementation manners

[0020] The following will combine the attached Figure 1 and the attached Figure 2 to explain this application in detail. However, it should be understood that these descriptions are only exemplary and do not intend to limit the scope of this application. In addition, in the following description, the descriptions of structures and well-known technical common sense are omitted to avoid unnecessarily confusing the concepts of this application.

[0021] Embodiment 1:

[0022] This application discloses a sand and dust environment simulation device, including a wind tunnel system, a sand and dust system, and a sand and dust filtration and recovery system;

[0023] The wind tunnel system includes a vertical DC wind tunnel 1, a fan 2, a ring-shaped sandblasting device 3, and a honeycomb device 17;

[0024] The vertical DC wind tunnel 1 is composed of an upper and lower connected power section and a test section 16. The fan 2 is arranged at the top of the power section; the honeycomb device 17 is installed in the test section 16 and is located at the entrance of the test section. The ring-shaped sandblasting device 3 is installed in the test section 16 and is located downstream of the honeycomb device 17;

[0025] The sand and dust system is connected to the ring-shaped sandblasting device 3 and provides sand and dust particles. The ring-shaped sandblasting device 3 spreads sand and dust in the direction of the air flow. The sand and dust filtration and recovery system is connected to the test section 16;

[0026] The sand and dust filtration and recovery system includes a fine filter cloth net 15, an electronic electrode 9, a thin magnetic plate 10, a mesh steel structure load-bearing floor 11, a fine filter steel mesh 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 load-bearing floor 11;

[0028] The fine filter cloth net 15 is provided with mounting holes, the end of the test section 16 is placed in the mounting holes, 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 load-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 load-bearing floor 11, the thin magnetic plate 10 is installed inside the filter net 13 and is attached to the filter net 13, and the fine filter steel net 12 is connected to the mesh steel structure load-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 outside the filter net 13, and the inner-layer electronic electrode is installed inside the thin magnetic plate 10; the electrostatic adsorption device 14 is sleeved outside the outer-layer electronic electrode, and the lower end of the electrostatic adsorption device 14 is vertically connected to the mesh steel structure load-bearing floor 11.

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

[0030] Further, the electrostatic adsorption device 14 is flange-connected to the mesh steel structure load-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 simulation environments that can be achieved in this embodiment are: 1. The air environment on the earth's surface; 2. The normal pressure in the wind tunnel; 3. The wind speed can be continuously adjusted within the range of 30 m / s to 100 m / s; 4. The sand and dust particle size range is 1 μm to 1000 μm, and the concentration range is 0.1 g / m 3 ~2.2 g / m 3 ; 5. The continuous test time: 1 hour to 6 hours.

[0034] Working principle and process:

[0035] This application adopts the method of a vertical DC wind tunnel, uses the fan as the power source to drive the movement of sand and dust in the wind tunnel to simulate the surface sand and dust environment; uses a sand and dust filtration and recovery system to filter the sand and dust; at the same time, during the test, the thin magnetic plate is vibrated in real time by using the characteristic of the rapid switching of the positive and negative poles of the electronic electrode to shake the sand and dust attached to the filter net to the ground; uses the electrostatic adsorption device to capture the escaping particles.

[0036] The fan 2 is the power source of the wind tunnel, and the rotation speed of the fan blades is used to control the simulation of different wind speeds in the test section under low pressure; the sand and dust system realizes different sand and dust concentrations under different working conditions by controlling the amount of sand and dust entering the wind tunnel; the annular sandblasting device 3 is centered on the axis of the test section of the vertical direct-current wind tunnel 1, and the sandblasting nozzles are evenly distributed in a ring. The sand and dust ejected from the nozzles are superimposed on each other in a conical shape and flow with the airflow in the tunnel, so as to form 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, which can intercept the vast majority of sand and dust particles. The airflow first jets out from the test section 16 and reaches the fine filtration steel mesh 12. The vast majority of sand and dust particles accumulate on the fine filtration steel mesh 12; the remaining sand and dust particles adhere to the filter mesh 13 along with the airflow. By utilizing the characteristic of the rapid switching of the positive and negative electrodes of the electronic electrode 9, the thin magnetic plate 10 vibrates in real time, shaking the sand and dust adhering to the filter mesh 13 onto the ground; the electrostatic adsorption device 14 is used to capture the escaping particles.

[0038] The above embodiments are only illustrative of the principles and effects of the present application, rather than limiting the present application. Any simple substitution or change within the scope of the technical ideas disclosed in the present application and according to the technical solutions of the present application shall be 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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