A sand and dust recovery device for a Martian wind tunnel

Abstract

The present invention discloses a sand and dust recovery device for a Martian wind tunnel, which can realize the centralized recovery of sand and dust without changing the original aerodynamic profile and flow field parameters of the Martian wind tunnel, effectively improving the recovery efficiency and reducing the recovery workload. The device includes an exhaust regulating valve, a sand and dust filter tank and a vacuum pump, and also includes a partition. The partition is installed in the vacuum container of the Martian wind tunnel, and the partition divides the inside of the vacuum container into two, forming two relatively independent chambers. The installation position of the partition coincides with the plane where the outlet of the wind tunnel in the test chamber is located. The test chamber where the wind tunnel is located is provided with a main exhaust port flange, which is connected to the main exhaust pipe; the top of the recovery chamber is provided with an auxiliary exhaust port flange, which is connected to the auxiliary exhaust pipe. After the main exhaust pipe and the auxiliary exhaust pipe are connected outside the vacuum container, they are connected to the inlet of the sand and dust filter tank through the exhaust regulating valve. The outlet of the sand and dust filter tank is connected to the vacuum pump, and the outlet of the vacuum pump is directly discharged to the atmosphere through the exhaust pipe.

Description

Technical Field

[0001] The invention relates to the field of Mars and deep space tester simulation, and in particular to a sand and dust recovery device for a Mars wind tunnel. Background Art

[0002] The Martian wind tunnel is a test simulation device developed for the Martian surface and atmospheric environment. The Martian wind tunnel can simulate the gas composition, atmospheric pressure, airflow field and surface dust environment on the Martian surface. The Martian wind tunnel generally requires a vacuum container that simulates the Martian atmospheric pressure. The Martian wind tunnel is placed horizontally in the vacuum container. In the test section of the Martian wind tunnel, different concentrations of dust can be simulated. After each Mars simulated dust test, the tester needs to be specially cleaned. The cleanliness of the container is related to the effect of the next test, and the cleaning time is also related to the preparation efficiency of the test. More importantly, the simulated Martian dust required for the wind tunnel test is specially prepared. The composition, composition, and particle size of the test dust are similar to the characteristics of the real Martian dust, and the price is very expensive. If the dust cannot be recovered in one test, then the cost of the test is relatively high.

[0003] Considering that during the dust cleaning and collection process, the simulated Martian dust is adsorbed in every corner, it is difficult to clean and time-consuming, and more dust can easily have an adverse effect on the observation glass, precision measuring equipment, etc. in the test area. Summary of the invention

[0004] In response to the problems existing in the prior art, the present invention provides a sand and dust recovery device for a Martian wind tunnel, which can achieve centralized recovery of sand and dust without changing the original aerodynamic profile and flow field parameters of the Martian wind tunnel, effectively improving the recovery efficiency and reducing the recovery workload.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a sand and dust recovery device for a Martian wind tunnel, comprising an exhaust regulating valve, a sand and dust filter tank and a vacuum pump, and also comprising a partition, the partition is installed in the vacuum container of the Martian wind tunnel, the partition divides the interior of the vacuum container into two, forming two relatively independent chambers, the installation position of the partition coincides with the plane where the outlet of the wind tunnel in the test chamber is located, the test chamber where the wind tunnel is located is provided with a main exhaust port flange, and is connected to the main exhaust pipe; an auxiliary exhaust port flange is provided on the top of the recovery chamber, and is connected to the auxiliary exhaust pipe, the main exhaust pipe and the auxiliary exhaust pipe are connected to the inlet of the sand and dust filter tank through the exhaust regulating valve after being connected outside the vacuum container, the outlet of the sand and dust filter tank is connected to the vacuum pump, and the outlet of the vacuum pump is directly discharged to the atmosphere through the exhaust pipe;

[0006] During the Mars wind tunnel dust simulation test, the sand and dust in the wind tunnel are driven by the airflow to the wind tunnel outlet. With the help of the exhaust pipes set up in the test chamber and the recovery chamber respectively, the pressure in the two chambers is kept balanced. After the sand and dust discharged from the wind tunnel outlet is discharged into the recovery chamber, most of them will settle directly, and a small number of particles with smaller particle sizes will be extracted from the auxiliary exhaust pipe. Under the action of the vacuum pump, the gas containing sand and dust will be intercepted by the sand and dust filter tank again and will not flow back into the vacuum container.

[0007] Furthermore, the partition is a circular partition formed by splicing two semicircular partitions, and a square hole is opened at the center of the circular cross-section. The size of the square hole is slightly larger than the wind tunnel outlet, and the edge of the square hole is sealed with a soft brush adjacent to the wind tunnel outlet. The edge of the circular partition is also sealed with a soft brush adjacent to the inner wall of the vacuum container, and the gap between the two semicircular partitions is also sealed with a soft brush.

[0008] Furthermore, two sets of supporting rotating shafts are provided at the upper and lower ends of the joint of the two semicircular partitions, which are used to connect to the inner wall surface of the vacuum container. The two semicircular partitions can rotate freely around the rotating shafts. Blocks are provided on the two side walls of the test chamber to prevent the two semicircular partitions from rotating toward the wind tunnel direction. Locking devices are installed on the two side walls of the vacuum container and the corresponding installation positions of the two semicircular partitions, which are used to fix and lock the two semicircular partitions.

[0009] Furthermore, the semicircular partition is a metal plate with a smooth surface.

[0010] Furthermore, handles are installed on the sides of the two semicircular partitions located in the recovery chamber.

[0011] Advantages and beneficial effects of the present invention: The present invention utilizes the existing vacuum container and the Mars wind tunnel, sets a partition, divides the vacuum container into a test chamber and a recovery chamber, and sets two exhaust pipes connected thereto, respectively, which can effectively separate the waste sand and dust during the sand and dust simulation test, while not affecting the balance of the exhaust pressure during the test, thereby ensuring the test effect. During the sand and dust cleaning and collection process, more than 97% of the sand and dust is concentrated in the recovery chamber and the filter tank of the vacuum container, which protects the equipment wear in the test area to the greatest extent, effectively improves the cleaning speed, reduces the cleaning workload, improves the recovery quality, and has high economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall schematic diagram of the device of the present invention.

[0013] Figure 2 It is a schematic cross-sectional view of the partition of the present invention.

[0014] Figure 3 It is a top view of the device of the present invention after the partition is opened.

[0015] In the figure: 1. vacuum container, 2. Mars wind tunnel, 3. sand and dust nozzle, 4. ejector, 5. wind tunnel outlet, 6. main exhaust port flange, 7. auxiliary exhaust port flange, 8. main exhaust pipe, 9. auxiliary exhaust pipe, 10. container door, 11. exhaust regulating valve, 12. sand and dust filter tank, 13. filter tank outlet, 14. vacuum pump, 15. exhaust pipe, 16. partition, 17. soft brush, 18. supporting rotating shaft, 19. locking device, 20. handle, 21. stopper. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] Example 1

[0018] Combination Figure 1-3 As shown, a sand and dust recovery device for a Martian wind tunnel includes an exhaust regulating valve 11, a sand and dust filter tank 12 and a vacuum pump 14, and also includes a partition 16. The partition 16 is installed in the vacuum container 1 of the Martian wind tunnel. The partition 16 divides the interior of the vacuum container 1 into two, forming two relatively independent chambers. The installation position of the partition coincides with the plane where the outlet of the wind tunnel in the test chamber is located. The test chamber where the wind tunnel is located is provided with a main exhaust port flange 6, which is connected to the main exhaust pipe 8; an auxiliary exhaust port flange 7 is provided on the top of the recovery chamber, which is connected to the auxiliary exhaust pipe 9. After the main exhaust pipe 8 and the auxiliary exhaust pipe 9 are connected outside the vacuum container 1, exhaust is passed through The regulating valve 11 is connected to the inlet of the sand and dust filter tank 12, the outlet of the sand and dust filter tank 12 is connected to the vacuum pump 14, and the outlet of the vacuum pump 14 is directly discharged into the atmosphere through the exhaust pipe 15; during the sand and dust simulation test, the sand and dust in the wind tunnel are driven by the airflow and blown to the outlet of the wind tunnel. Under the action of the exhaust pipes respectively set in the test chamber and the recovery chamber, the pressure of the two chambers is kept balanced. After the sand and dust discharged from the wind tunnel outlet is discharged into the recovery chamber, most of them will settle directly, and a small number of particles with smaller particle sizes will be extracted from the auxiliary exhaust pipe. Under the action of the vacuum pump, the gas with sand and dust will be intercepted by the sand and dust filter tank again, and will not flow back into the vacuum container.

[0019] The partition 16 is a circular partition formed by splicing two semicircular partitions. A square hole is opened at the center of the cross section of the circular partition. The size of the square hole is slightly larger than the wind tunnel outlet. The edge of the square hole is blocked by a soft brush 17 adjacent to the wind tunnel outlet. The edge of the circular partition is also blocked by a soft brush 17 adjacent to the inner wall of the vacuum container 1. The gap between the two semicircular partitions is also blocked by a soft brush 17.

[0020] For the convenience of operation and maintenance, two sets of supporting rotating shafts 18 are provided at the upper and lower ends of the joint of the two semicircular partitions for connecting to the inner wall surface of the vacuum container. The two semicircular partitions can rotate freely around the supporting rotating shafts. Blocks 21 are provided on the two side walls of the test chamber to prevent the two semicircular partitions from rotating toward the wind tunnel direction. Locking devices 19 are installed on the two side walls of the vacuum container 1 and the corresponding installation positions of the two semicircular partitions for fixing and locking the two semicircular partitions.

[0021] The semicircular partition is a metal plate, which is convenient for cleaning sand and dust and has a smooth surface.

[0022] The two semicircular partitions are located on the sides of the recovery chamber and are both provided with handles 20. When the door of the vacuum container is open, the locking device of the partition is opened and the partition is pulled to rotate toward the door of the vacuum container.

[0023] The interior of the filter tank is a dust removal filter tank, which is an industrial shelf product with a built-in filter bag. The filter bag can filter dust into a recovery chamber at the bottom of the filter tank through electromagnetic vibration.

[0024] During the sand and dust simulation test, the sand and dust in the wind tunnel are driven by the air flow and blown to the wind tunnel outlet. With the help of the exhaust pipes set in the test chamber and the recovery chamber, the pressure of the two chambers can be kept balanced. After the sand and dust discharged from the wind tunnel outlet is discharged to the recovery chamber, most of them will settle directly, and a small number of particles with smaller particle sizes will be extracted from the auxiliary exhaust pipe. Under the action of the vacuum pump, the gas with sand and dust will be intercepted by the sand and dust filter tank again, and will not flow back into the vacuum container, which ensures the clean effect of the vacuum container test chamber. The partition is sealed with a soft brush around, so most of the sand and dust particles can be effectively blocked during the test. The reason for not using complete sealing is that during the test, under the action of the sand and dust nozzle, a very small amount of residual sand and dust will be discharged from the wind tunnel entrance in the test chamber, and the complete sealing method is not conducive to the air pressure balance of the two chambers, especially when the pressure is restored after the test. The soft brush plugging can achieve an excellent blocking effect.

[0025] Example 2

[0026] The sand and dust recovery device for a Martian wind tunnel described in the embodiment is used, and its operation process includes the following steps:

[0027] Step 1: Check whether all partitions have returned to the locked position and are in a locked state, and whether the container door is in a closed and locked state.

[0028] Step 2: Start the sand and dust simulation test.

[0029] Step 3: After the test, turn off the wind tunnel wind speed system, the sand and dust simulation system and the vacuum system, and restore the pressure of the vacuum container to normal pressure to ensure that the container returns to normal pressure.

[0030] Step 4: Open the door of the vacuum container and clean and recycle the sand and dust inside the door.

[0031] Step 5: Clean and recover the sand and dust in the container on the wind tunnel outlet side, including cleaning and recovering the sand and dust on the partition.

[0032] Step 6: Open the filter tank and recover the sand and dust at the bottom of the filter tank (before the filter).

[0033] Step 7: Complete all cleaning and recycling, reset the status of each device, and end the operation.

[0034] After the test of this device is completed, the recovery chamber of the vacuum container and the sand and dust filter tank need to be cleaned and recycled respectively. The recovery rate of these two parts can reach 97%. The recovery chamber of the vacuum container includes the inner wall of the container's spherical door, the inner wall of the vacuum container's barrel, and the partition (including a soft brush). The above wall surfaces are all smooth metal surfaces. You only need to use tools to gently sweep out and put them into the recovery container. The filter tank is equipped with a recovery chamber at the bottom. The recovery can be completed by opening the chamber cover.

Claims

1. A sand and dust recovery device for a Martian wind tunnel, comprising an exhaust regulating valve, a sand and dust filter tank and a vacuum pump, characterized in that: The air filter is connected to the vacuum pump and the air is pumped out of the air filter chamber, and then the air filter is pumped out of the air filter chamber, and the pressure in the two chambers is kept balanced. After the air filter is pumped out, most of the dust and sand in the air filter chamber will settle directly, and a small number of particles with smaller particle sizes will be extracted from the auxiliary air extraction pipe. The gas with sand and dust will be intercepted by the sand and dust filter tank again and will not flow back into the vacuum container; the partition is a circular partition formed by splicing two semicircular partitions, a square hole is opened at the center of the cross section of the circular partition, the size of the square hole is slightly larger than the wind tunnel outlet, the edge of the square hole is blocked by a soft brush adjacent to the wind tunnel outlet, the edge of the circular partition is blocked by a soft brush adjacent to the inner wall of the vacuum container, and the gap between the two semicircular partitions is also blocked by a soft brush; two sets of supporting rotating shafts are provided at the upper and lower ends of the splicing of the two semicircular partitions for connecting the inner wall of the vacuum container, the two semicircular partitions can rotate freely around the rotating shaft, and blocks are provided on the two side walls of the test chamber to prevent the two semicircular partitions from rotating toward the direction of the Mars wind tunnel, and locking devices are installed on the two side walls of the vacuum container at the corresponding installation positions of the two semicircular partitions; the semicircular partition is a metal plate with a smooth surface; handles are installed on the sides of the two semicircular partitions located in the recovery chamber.

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