High-uniformity micron-sized dust sprinkling vibrating screen, sprinkling device and detection method

Abstract

The application discloses a high-uniformity micron-level dust sprinkling vibrating screen, a sprinkling device and a detection method, relates to the technical field of space environment simulation, and aims to provide a micron-level dust sprinkling vibrating screen with a large sprinkling area and high sprinkling uniformity. The screen comprises a first woven mesh structure layer, an aluminum honeycomb structure layer and a second woven mesh structure layer which are sequentially connected from top to bottom. A plurality of uniformly distributed screen holes are arranged on the first woven mesh structure layer and the second woven mesh structure layer, and the aperture of the first woven mesh structure layer is larger than that of the second woven mesh structure layer. The aluminum honeycomb structure layer comprises a plurality of columnar honeycomb compartments, the bottom surface of each columnar honeycomb compartment is a regular hexagon, and the columnar honeycomb compartments are connected with the first woven mesh structure layer and the second woven mesh structure layer. The screen is designed by adopting the upper and lower woven layers and the middle aluminum honeycomb structure layer, and thus the problems of a small sprinkling area and low sprinkling uniformity of micron-level and sub-micron-level diameter dust are solved.

Description

Technical Field

[0001] This invention relates to the field of space environment simulation technology. Background Technology

[0002] During lunar exploration activities, due to the microgravity and vacuum environment of the moon, lunar dust particles are easily suspended in the air and adhere to the surface of exploration equipment, interfering with or even harming normal exploration activities. Currently available international dust application devices are limited by the size of micron- and submicron-sized dust particles, resulting in small application areas and low uniformity, making it difficult to simulate a large-area, uniform dust application environment. For example, NASA's MSFCLDAB device can only achieve a 300mm × 300mm application area and 60% uniformity, while the lunar dust chamber of the Beijing Satellite Environmental Engineering Institute can only achieve a 600mm × 800mm application area and 60% uniformity.

[0003] Therefore, how to provide a vibrating screen for spraying micron-sized dust with a large spraying area and high spraying uniformity has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a high-uniformity micron-sized dust spraying vibrating screen, spraying device, and detection method. The vibrating screen is designed with upper and lower woven mesh structures with different apertures and an intermediate aluminum honeycomb structure layer, which solves the problems of small spraying area and low spraying uniformity for micron-sized and submicron-sized dust.

[0005] Based on the same inventive concept, this invention has three independent technical solutions:

[0006] 1. A high-uniformity, large-area micron-level dust spraying vibrating screen, comprising a first woven mesh structure layer, an aluminum honeycomb structure layer, and a second woven mesh structure layer connected sequentially from top to bottom;

[0007] The first woven mesh structure layer and the second woven mesh structure layer are provided with a plurality of uniformly distributed sieve holes, and the sieve diameter of the first woven mesh structure layer is larger than the sieve diameter of the second woven mesh structure layer.

[0008] The aluminum honeycomb structure layer includes multiple columnar honeycomb compartments, the bottom surface of which is a regular hexagon and is connected vertically to the first woven mesh structure layer and the second woven mesh structure layer.

[0009] Furthermore, the aluminum honeycomb structure layer is made of aluminum alloy with an anodized surface, the columnar honeycomb compartment is composed of aluminum plates with a thickness of 0.3mm, the opposite sides of the regular hexagons are 3mm apart, the aluminum plates are connected by fluorocarbon resin adhesive, and the aluminum honeycomb structure layer has a thickness of 9mm.

[0010] Furthermore, the first woven mesh structure layer and the second woven mesh structure layer are made of stainless steel, the first woven mesh structure layer has a pore size of 120 μm, and the second woven mesh structure layer has a pore size of 100 μm.

[0011] Furthermore, the first woven mesh structure layer and the aluminum honeycomb structure layer are reinforced and connected by welding, and the aluminum honeycomb structure layer and the second woven mesh structure layer are reinforced and connected by welding.

[0012] Furthermore, the first woven mesh structure layer and the second woven mesh structure layer are made using a plain weave process, with both warp and weft yarns having a diameter of 0.1 mm. Each warp yarn crosses over and passes through each weft yarn, and each weft yarn crosses over and passes through each warp yarn, with the angle between the warp and weft yarns being 90°.

[0013] 2. A high-uniformity, large-area micron-level dust spreading device, comprising the above-mentioned screen, frame bracket, four elastic support members, two eccentric cams, two support brackets, a vibrating screen motor, and a transmission mechanism;

[0014] The screen is mounted on the frame support, with the four corners of the screen and the frame support coinciding and connected by the elastic support members. Two adjacent elastic support members are connected to the eccentric cams through the support bracket. The two eccentric cams are respectively located below opposite sides of the frame support. The vibrating screen motor is connected to the eccentric cams through the transmission mechanism, driving the eccentric cams to rotate.

[0015] Furthermore, the transmission mechanism is a chain drive structure, connected to the output shaft of the vibrating screen motor. The transmission mechanism and the eccentric cam are pre-fixed by set screws and then fixed by pins after adjustment.

[0016] Furthermore, the spraying device also includes a spraying plane and a dust-collecting motor, the dust-collecting motor being connected to the spraying plane via a steel wire rope.

[0017] Furthermore, the support component and one side of the frame bracket form a trapezoidal cross section, in which the length of the base tangent to the eccentric cam in the trapezoidal cross section is 40mm, and the eccentric distance of the eccentric cam is 4mm.

[0018] 3. A method for detecting the uniformity of dust application using a vibrating screen, employing the aforementioned application device, comprising the following steps:

[0019] Multiple test points were evenly selected at the edge and inside of the screen spraying area, and a dust cup was set at each test point;

[0020] The dust spreading device described above was used for dust spreading, and the mass of dust in each dust cup was measured after the spreading was completed.

[0021] Measure the diameter of the dust cup opening;

[0022] Based on the mass of the dust and the diameter of the dust cup opening, calculate the mass of the sprayed dust per unit area at each test point;

[0023] The uniformity of dust application is calculated based on the mass of dust applied per unit area at each test point.

[0024] The high-uniformity micron-level dust spreading vibrating screen, spreading device, and detection method provided by this invention have at least the following beneficial effects:

[0025] (1) This invention provides a high uniformity large area dust spraying vibrating screen structure, which can realize a variety of vibrating screen configurations according to the requirements of spraying area and dust particle size. The upper and lower layers adopt woven mesh structures with different apertures for preliminary screening and secondary screening. The middle aluminum honeycomb structure layer plays the role of sound insulation, heat insulation, shock absorption and support, achieving a spraying uniformity of not less than 71%, and solving the problems of small spraying area and low spraying uniformity of micron and submicron diameter dust.

[0026] (2) This invention provides a vertically vibrating flexible screen + aluminum honeycomb panel composite vibrating screen configuration, and proposes a dust spraying device using the vibrating screen for dust spraying. The vibration frequency is adjusted by using an eccentric cam and point excitation to simulate the lunar dust environment on the moon. The excitation end and the screen surface are supported by a trapezoidal plate surface, so that the excitation is applied more evenly to the screen surface to achieve uniform spraying.

[0027] (3) The present invention provides a method for detecting the uniformity of spraying corresponding to the screen and spraying device and conducts actual tests. It can achieve a high uniformity effect. The actual test results show that when the dust particle size is 0.1~100μm, the uniformity of spraying on an area of ​​1000mm×1000mm is better than 71%, which is a leading level in both spraying area and spraying uniformity. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A side view of an embodiment of the high-uniformity, large-area micron-level dust spraying vibrating screen provided by the present invention;

[0030] Figure 2 A top view of an embodiment of the high-uniformity, large-area micron-level dust spraying vibrating screen provided by the present invention;

[0031] Figure 3 An isometric view of an embodiment of the high-uniformity, large-area micron-level dust spraying vibrating screen provided by the present invention;

[0032] Figure 4 A partial enlarged view of an embodiment of the high-uniformity, large-area micron-level dust-spraying vibrating screen provided by the present invention;

[0033] Figure 5 A schematic diagram of the structure of one embodiment of the high uniformity large-area micron-level dust spraying device provided by the present invention;

[0034] Figure 6 A schematic diagram of the excitation application in the high uniformity, large-area micron-level dust spraying device provided by the present invention;

[0035] Figure 7 This is a schematic diagram of an application scenario for the high uniformity micron-level dust spraying detection method provided by the present invention using a vibrating screen.

[0036] Reference numerals: 1-Screen, 101-First woven mesh structure layer, 102-Aluminum honeycomb structure layer, 103-Second woven mesh structure layer, 2-Frame bracket, 3-Eccentric cam, 4-Vibrating screen motor, 5-Support bracket, 6-Elastic support component, 7-Transmission mechanism, 8-Spraying plane, 9-Dust collection motor, 10-Wire rope, 11-Dust box support frame. Detailed Implementation

[0037] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, but should not be construed as limiting this application.

[0039] In the description of this application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, terms such as "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to mechanical connections or electrical connections, direct connections or indirect connections through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Example 1:

[0043] See Figures 1-3 In some embodiments, a high-uniformity, large-area micron-level dust spraying vibrating screen is provided, comprising a first woven mesh structure layer 101, an aluminum honeycomb structure layer 102, and a second woven mesh structure layer 103 connected sequentially from top to bottom;

[0044] The first woven mesh structure layer 101 and the second woven mesh structure layer 103 are provided with a plurality of uniformly distributed sieve holes, and the sieve diameter of the first woven mesh structure layer 101 is larger than the sieve diameter of the second woven mesh structure layer 103.

[0045] The aluminum honeycomb structure layer 102 includes multiple columnar honeycomb compartments, the bottom surface of which is a regular hexagon and is connected vertically to the first woven mesh structure layer 101 and the second woven mesh structure layer 103.

[0046] The vibrating screen is equipped with three types of screens: the first type has an average screen aperture diameter of 50μm, a spraying area ≥300mm×300mm, and is suitable for dust particle sizes of 0.1-50μm; the second type has an average screen aperture diameter of 75μm, a spraying area ≥300mm×300mm, and is suitable for dust particle sizes of 0.1-75μm; and the third type has an average screen aperture diameter of 100μm, a spraying area ≥1000mm×1000mm, and is suitable for dust particle sizes of 0.1-100μm. The vibrating screen has a vibration frequency of 0.1-5Hz, a spraying mass uniformity per unit area ≥70%, and a dust settling rate of 0-40g / m³. 2 ·s.

[0047] Taking a vibrating screen structure suitable for dust particle sizes ranging from 0.1μm to 100μm as an example, the average diameter of the screen openings is required to be 100μm, and the spraying area must be ≥1000mm×1000mm. This high-uniformity dust spraying screen has a three-layer structure: the upper and lower layers are stainless steel woven mesh structures, both made using a plain weave process, meaning that the diameter of both warp and weft wires is 0.1mm. Each warp wire crosses over and over each weft wire, and vice versa, with the angle between the warp and weft wires being 90°. This structure ensures uniform mesh size and structural stability. The middle layer is an aluminum honeycomb structure, made of aluminum alloy with mechanical properties conforming to GB / T3880.2, and the surface is anodized.

[0048] The aluminum honeycomb structure layer 102 is made of anodized aluminum alloy. The columnar honeycomb compartments are composed of aluminum plates with a thickness of 0.3 mm. The opposite sides of the regular hexagons are spaced 3 mm apart. The aluminum plates are connected by fluorocarbon resin adhesive, which has good corrosion resistance, heat resistance, and moisture resistance. The overall thickness of the aluminum honeycomb structure layer is 9 mm, and the overall thickness of the vibrating screen is approximately 10 mm, with a length of 1200 mm and a width of 1048 mm.

[0049] The first woven mesh layer 101 and the second woven mesh layer 103 are made of stainless steel. The first woven mesh layer 101 has a pore size of 120 μm, and the second woven mesh layer 103 has a pore size of 100 μm. Specifically, the dust is sprayed from top to bottom. The upper stainless steel woven mesh has a larger pore size, with an average diameter of 120 μm, meaning that the distance between two adjacent warp or weft threads is 0.12 mm, which can perform initial screening of dust. The lower stainless steel plate has a smaller pore size, with an average diameter of 100 μm, meaning that the distance between two adjacent warp or weft threads is 0.1 mm, which meets the design requirements while further screening the dust. The pores of the upper and lower woven meshes do not need to be aligned, which ensures that the dust particles stay in the structure for a longer time when the screen vibrates up and down, achieving the purpose of uniform spraying.

[0050] The first woven mesh structure layer 101 and the aluminum honeycomb structure layer 102 are reinforced and connected by welding, and the aluminum honeycomb structure layer 102 and the second woven mesh structure layer 103 are reinforced and connected by welding.

[0051] The vibrating screen helps the spraying device achieve uniform settling of lunar dust, simulating the dynamic migration and settling process of dust under vacuum conditions on the lunar surface. The first woven mesh layer performs initial screening of the dust, the second woven mesh layer performs secondary screening, and the middle aluminum honeycomb structure layer provides sound insulation, heat insulation, vibration damping, and support. Adjacent layers are reinforced and connected by welding. This overall structure can be called a vertically vibrating flexible screen + aluminum honeycomb panel composite vibrating screen configuration.

[0052] The high-uniformity micron-sized dust spreading vibrating screen provided in this embodiment can achieve various vibrating screen configurations according to the requirements of spreading area and dust particle size. The upper and lower layers adopt woven mesh structures with different pore sizes for preliminary screening and secondary screening. The middle aluminum honeycomb structure layer plays the roles of sound insulation, heat insulation, shock absorption and support, achieving a spreading uniformity of not less than 71%, and solving the problems of small spreading area and low spreading uniformity of micron-sized and submicron-sized dust.

[0053] Example 2:

[0054] See Figure 5 In some embodiments, a high uniformity large-area micron-level dust spraying device is provided, including a screen 1, a frame bracket 2, four elastic support members 6, two eccentric cams 3, two support brackets 5, a vibrating screen motor 4, and a transmission mechanism 7 provided in Embodiment 1.

[0055] The screen 1 is mounted on the frame support 2. The four corners of the screen 1 and the frame support 2 coincide and are connected by elastic support members 6. Two adjacent elastic support members 6 are connected to the eccentric cam 3 through the support bracket 5. The two eccentric cams 3 are respectively located below opposite sides of the frame support 2. The vibrating screen motor 4 is connected to the eccentric cam 3 through the transmission mechanism 7, which drives the eccentric cam 3 to rotate.

[0056] In a preferred embodiment, the lower end of the elastic support 6 is a spring, and the upper end is a columnar rod connected to the spring. The elastic support 6 is vertically arranged at the four corners of the frame bracket 2. The spraying device also includes a dust box support frame 11 for placing a dust box containing dust. The dust box support frame 11 is fixedly connected to two of the elastic support members 6.

[0057] The spraying device also includes a spraying plane 8 and a dust-collecting motor 9, which is connected to the spraying plane 8 via a steel wire rope 10.

[0058] As a preferred implementation method, the vibrating screen 1 and the frame support 2 are connected by a threaded fastening connection, which is evenly distributed around the perimeter.

[0059] The transmission mechanism 7 is a chain drive structure connected to the output shaft of the vibrating screen motor 4. The transmission mechanism 7 is pre-fixed to the eccentric cam 3 with set screws, and then fixed with pins after adjustment. The output shaft of the vibrating motor 4 is directly connected to the chain drive structure, and drives the distal sprocket to rotate through a torque rod. The two driven sprockets are directly connected to the eccentric cam 3, transmitting the motor torque to the eccentric cam 3, driving the eccentric cam 3 to rotate, generating impact loads on the frame bracket 2 and the support bracket 5, thereby causing the vibrating screen 1 to vibrate up and down at a set frequency.

[0060] There are two eccentric cams 3, each positioned below opposite sides of the frame bracket 2. The support bracket 5 includes two support components, each connected to a corresponding eccentric cam 3. The support component 5 and one side of the frame bracket 2 form a trapezoidal cross-section. To apply the excitation more evenly to the screen surface, the excitation end and the screen surface are supported by a trapezoidal plate, such as... Figure 6 As shown.

[0061] The spraying surface 8 is a stainless steel roller shutter. The spraying surface 8 is rolled up and flattened by the dust collection motor 9 pulling the steel wire rope 10 to realize its operation.

[0062] In the trapezoidal cross-section, the length of the base tangent to the eccentric cam is 40mm, the eccentricity of the eccentric cam is 4mm, and the acute angle between the waist and the base of the trapezoidal cross-section is 30°. The distribution of the vibration amplitude of the vibrating screen directly affects the uniformity of the simulated lunar dust spray. The vibrating screen excitation device is an eccentric wheel type, the excitation amplitude is the same as the eccentricity, the excitation amplitude is 4mm, and the excitation method is point excitation.

[0063] The eccentric cam, acting as the vibration source of the vibration system, is directly connected to the screen support bracket. Under the combined action of the eccentric cam and the columnar elastic support, the screen bracket vibrates periodically up and down, simultaneously causing the screen fixed to the bracket to vibrate. At a certain vibration frequency, lunar dust falling onto the screen is evenly dispersed into a predetermined space, simulating the lunar dust environment on the moon. The vibration frequency of the screen can be adjusted by changing the motor speed, while the vibration amplitude can be adjusted by modifying the cam structure design.

[0064] Before operation, the dust collection motor 9 is started, which drives the steel wire rope 10 to pull the spreading plane 8 open to collect dust. During operation, the vibrating screen motor 4 is started, which drives the eccentric cam 3 through the transmission mechanism 7 to apply excitation to the support bracket 5, causing the frame bracket 2 to vibrate, thereby causing the screen 1 to vibrate. Through the combined action of the spring in the elastic support 6 and the frame bracket 2, the dust box placed on the dust box support frame 11 vibrates together. The dust box support frame 11 and the screen 1 vibrate together. Under a certain frequency of vibration, the lunar dust falling on the screen is evenly spread onto the spreading plane 8 through the screen 1, simulating the lunar dust environment on the moon and achieving large-area uniform spreading.

[0065] This embodiment proposes a highly uniform micron-level dust spreading device based on a vertically vibrating flexible screen and an aluminum honeycomb panel composite vibrating screen configuration. It employs an eccentric cam and point excitation to adjust the vibration frequency, simulating the lunar dust environment. The excitation end and the screen surface are supported by a trapezoidal plate, ensuring more even application of the excitation to the screen surface and achieving uniform spreading. The dust box above the vibrating screen vibrates periodically up and down to ensure even spreading of lunar dust. To achieve different screen vibration frequencies, the motor speed is adjusted in conjunction with the eccentricity of the cam, resulting in an adjustable frequency screen vibration.

[0066] Example 3:

[0067] See Figure 7 In some embodiments, a method for detecting the uniformity of dust spraying on a vibrating screen is provided, comprising the following steps:

[0068] S1. Select multiple test points evenly at the edge and inside of the screen spraying range, and set a dust cup at each test point;

[0069] S2. Dust is sprayed using the dust spraying device provided in Example 2. After spraying, the mass of dust in each dust cup is measured.

[0070] S3. Measure the diameter of the dust cup opening;

[0071] S4. Calculate the mass of the sprayed dust per unit area at each test point based on the mass of the dust and the diameter of the dust cup opening.

[0072] S5. Calculate the uniformity of dust application based on the mass of dust applied per unit area at each test point.

[0073] Specifically, the tools used for testing include: an optical microscope, a dust cup, an electronic scale, and a stopwatch.

[0074] When selecting multiple points evenly at the edge and inside of the screen's spraying range, the number of points is 13.

[0075] As a preferred implementation method, an electronic scale is used to measure the mass of dust in each dust cup, and the accuracy of the electronic scale is 0.01g.

[0076] The uniformity of application is calculated using the following formula:

[0077]

[0078] η = 1 - ε;

[0079]

[0080] Where η is the uniformity of application, ε is the deviation of uniformity of application, N is the number of test points, and z i Let be the mass of lunar dust sprayed per unit area at the i-th test point. This represents the average amount of lunar dust sprayed.

[0081] Specifically, the screen uniformity test method includes the following steps:

[0082] Step 1: Review the product certificates for the three types of screens provided in Example 1, and use an optical microscope to measure the diameter of the three types of screen holes to determine whether the average aperture of the three types meets the requirements.

[0083] Step 2: Measure the spraying area of ​​the three types of screens. Use a measuring tape to measure the spraying area of ​​the three types of screens and record the measurement data.

[0084] Step 3: Vibration frequency detection of the vibrating screen. Using a digital frequency meter, the number of vibration pulses is measured within one minute to obtain the average vibration frequency of the vibrating screen within one minute.

[0085] Step 4: Test the uniformity of application. Select 13 points evenly along the edge and inside of the application area on the screen, as shown in the diagram. Figure 7 As shown, 13 numbered dust cups were placed at 13 testing points. The process and results of dust application were recorded by taking pictures with a camera. The mass of dust applied at the 13 points was measured using an electronic scale (accuracy 0.0001g). The diameter of the dust cup opening was measured with a vernier caliper, and the area was calculated to obtain the mass of dust applied per unit area. The measurement was taken three times and the average value was taken. All test results were recorded in the "Dust Application Uniformity Test Record Table".

[0086] Step 5: Calculate the uniformity of application.

[0087] Step Six: Dust Settling Rate Detection. The dust settling rate is measured using a dust cup, stopwatch, and electronic scale. Three different average diameter screens, three different vibration frequencies (0.5Hz, 2Hz, and 4.5Hz), and two different initial monthly dust masses (10kg and 20kg) in the dust spreading cart are selected. The dust cup is placed under the dust spreading cart, and the dust spreading time is set to 30 seconds. The diameter of the dust cup opening is measured with vernier calipers, and the monthly dust mass falling into the dust cup is measured twice. The dust settling rate per unit area is calculated. The monthly dust mass falling into the dust cup and the dust settling rate calculation results are recorded in the "Dust Settling Rate Detection Item Record of Spreading Device".

[0088] In a specific application scenario, taking an average sieve aperture diameter of 100μm as an example, Tables 1-3 record the empty cup mass, dust collection mass, and differential mass of the dust cup. Table 4 records the uniformity of spraying. As shown in Table 4, using the sieve provided in Embodiment 1 of this invention can ensure that the uniformity of spraying is not less than 71%.

[0089] Table 1

[0090]

[0091] Table 2

[0092]

[0093] Table 3

[0094]

[0095] Table 4

[0096]

[0097] The test pass criteria are as follows: Average diameter of sieve apertures for type 1: Φ50±5μm; Spraying area of ​​type 1 sieve apertures ≥300mm×300mm; Average diameter of sieve apertures for type 2: Φ75±5μm; Spraying area of ​​type 2 sieve apertures ≥300mm×300mm; Average diameter of sieve apertures for type 3: Φ100±5μm; Spraying area of ​​type 3 sieve apertures ≥1000mm×1000mm; Vibration frequency of vibrating screen: 0.1-5Hz; Uniformity of spraying mass per unit area: ≥70%; Dust settling rate: 0~40g / m³ 2 ·s.

[0098] The following comparative experiments further illustrate the beneficial effects of the vibrating screen and spraying device provided by the present invention:

[0099] Through experimental measurements, the spraying area and spraying uniformity of NASA's MSFCLDAB and the lunar dust chamber equipment of Beijing Satellite Environmental Engineering Research Institute are shown in Table 5. It can be seen that the spraying device provided in this embodiment has the largest spraying area and the highest spraying uniformity, with a uniformity of not less than 71%.

[0100] Table 5

[0101] Equipment Name Spraying area Spraying uniformity MSFCLDAB 300mm×300mm 60％ Lunar Dust Container 600mm×800mm 60％ This embodiment 1000mm×1000mm 71％

[0102] This embodiment provides a method for detecting the uniformity of spraying corresponding to the screen and spraying device, and conducts actual tests. It can achieve a high uniformity effect. The test results show that when the dust particle size is 0.1~100μm, the uniformity of spraying on a 1000mm×1000mm area is better than 71%, which is a leading level in both spraying area and spraying uniformity.

[0103] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if these modifications and modifications of the invention fall within the scope of the claims and their equivalents, the invention is also intended to include these modifications and modifications.

Claims

1. A vibrating screen for spreading micron-level dust with high uniformity and large area, characterized in that, It includes a first woven mesh structure layer, an aluminum honeycomb structure layer, and a second woven mesh structure layer connected from top to bottom; The first woven mesh structure layer and the second woven mesh structure layer are provided with a plurality of uniformly distributed sieve holes, and the sieve diameter of the first woven mesh structure layer is larger than the sieve diameter of the second woven mesh structure layer. The aluminum honeycomb structure layer includes multiple columnar honeycomb compartments, the bottom surface of which is a regular hexagon and is connected vertically to the first woven mesh structure layer and the second woven mesh structure layer; The upper and lower woven mesh structures are made using a plain weave process, meaning that both the warp and weft threads have a diameter of 0.1 mm. Each warp thread crosses over and through each weft thread, and each weft thread crosses over and through each warp thread, with the warp and weft threads forming a 90° angle. This structure is used to ensure that the mesh size is uniform and the structure is stable. The holes in the upper and lower woven mesh structures do not need to be aligned. This is to ensure that when the screen vibrates up and down, the dust particles stay in the structure for a longer time, thus achieving the purpose of uniform spraying.

2. The sieve according to claim 1, characterized in that, The aluminum honeycomb structure layer is made of aluminum alloy with an anodized surface. The columnar honeycomb compartments are made of aluminum plates with a thickness of 0.3mm. The opposite sides of the regular hexagons are 3mm apart. The aluminum plates are connected by fluorocarbon resin adhesive. The thickness of the aluminum honeycomb structure layer is 9mm.

3. The sieve according to claim 1, characterized in that, The first woven mesh structure layer and the second woven mesh structure layer are made of stainless steel. The pore size of the first woven mesh structure layer is 120 μm, and the pore size of the second woven mesh structure layer is 100 μm.

4. The sieve according to claim 1, characterized in that, The first woven mesh structure layer and the aluminum honeycomb structure layer are reinforced and connected by welding, and the aluminum honeycomb structure layer and the second woven mesh structure layer are reinforced and connected by welding.

5. A device for spreading micron-level dust with high uniformity over a large area, characterized in that, It includes the screen, frame bracket, four elastic support members, two eccentric cams, two support brackets, vibrating screen motor, and transmission mechanism as described in any one of claims 1-4; The screen is mounted on the frame support, with the four corners of the screen and the frame support coinciding and connected by the elastic support members; two adjacent elastic support members are connected to the eccentric cams through the support bracket, and the two eccentric cams are respectively located below opposite sides of the frame support; the vibrating screen motor is connected to the eccentric cams through the transmission mechanism, driving the eccentric cams to rotate.

6. The spraying device according to claim 5, characterized in that, The transmission mechanism is a chain drive structure, which is connected to the output shaft of the vibrating screen motor. The transmission mechanism and the eccentric cam are pre-fixed by set screws and then fixed by pins after adjustment.

7. The spraying device according to claim 5, characterized in that, The spraying device also includes a spraying plane and a dust-collecting motor, which is connected to the spraying plane via a steel wire rope.

8. The spraying device according to claim 7, characterized in that, The support bracket and one side of the frame bracket form a trapezoidal cross section. In the trapezoidal cross section, the length of the base tangent to the eccentric cam is 40mm, and the eccentric distance of the eccentric cam is 4mm.

9. A method for detecting the uniformity of dust application using a vibrating screen, employing the application device as described in any one of claims 5-8, characterized in that... Includes the following steps: Multiple test points were evenly selected at the edge and inside of the screen spraying area, and a dust cup was set at each test point; The dust is sprayed using the aforementioned spraying device, and the mass of dust in each dust cup is measured after spraying is completed. Measure the diameter of the dust cup opening; Based on the mass of the dust and the diameter of the dust cup opening, calculate the mass of the sprayed dust per unit area at each test point; The uniformity of dust application is calculated based on the mass of dust applied per unit area at each test point.

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