Flow adjustable solid particle generator

Abstract

The application provides a solid particle generator with adjustable flow, which comprises a cylinder, an annular baffle and an adjustable baffle assembly. The annular baffle is arranged in the interior of the cylinder, so that the annular baffle divides a sealed cavity into an upper cavity and a lower cavity for storing tracer particles. The cylinder is provided with a first introduction hole, a second introduction hole and an outlet hole. The first gas is introduced into the upper cavity through the first introduction hole, and the second gas for mixing with the tracer particles is introduced into the lower cavity through the second introduction hole. The flow ratio of the first gas and the second gas mixed with the tracer particles is adjusted by adjusting the flow of the first gas and the second gas. The through channel is formed on the annular baffle, the adjustable baffle assembly is arranged on the annular baffle, and the adjustable baffle assembly can adjust the sectional area of the through channel, so as to adjust the flow of the second gas mixed with the tracer particles in the lower cavity and guided into the upper cavity, and further increase the concentration of the tracer particles guided out of the outlet hole.

Description

Technical Field

[0001] This application relates to the field of aerospace equipment technology, and in particular to a flow-adjustable solid particle generator. Background Technology

[0002] Particle image velocimetry (PIV) is a transient, multi-point, non-contact optical velocimetry technique that has been widely applied to various flow field measurement problems since its inception. PIV technology can record the positional information of a large number of spatial points in a short time, thereby obtaining velocity distribution information of the flow field and providing structural and characteristic analysis of the flow field. In the specific implementation of PIV, tracer particles are added to the flow field. These tracer particles are illuminated by a laser and captured by a camera. By obtaining the motion information of the tracer particles, the flow information of the flow field can be reflected.

[0003] In PIV (Pilot-Induced Vibration), the most critical issue is the distribution of tracer particles in the flow field, which directly affects the clarity of particle imaging. Typically, tracer particles have a diameter of 100 nm to 10 μm. The distribution of tracer particles in the PIV experimental flow field mainly relies on the connection between the particle generator and the pipeline of the experimental flow field, thereby releasing the particles into the flow field. Therefore, the design of the particle generator directly affects whether the particles can be effectively, uniformly, and controllably distributed into the flow field.

[0004] Existing particle generators for particle distribution mostly rely on airflow to directly carry stationary particles into the flow field to be measured. This method mainly depends on the adsorption force of high-speed airflow on solids to bring particles into the flow field. Due to the limited adsorption force of airflow on solid particles and the relatively high airflow velocity, these particle generators generally suffer from uneven particle distribution and easy agglomeration of particles, resulting in poor particle distribution. Furthermore, because of their overly simplistic implementation, these particle generators make it difficult to adjust the number of adsorbed particles by regulating the airflow or other means, i.e., it is difficult to adjust the particle concentration, resulting in overall poor particle delivery performance.

[0005] In addition, there are other types of particle generators, such as those that regulate flow through electrical control or motor-driven valves. While these can effectively regulate particle concentration, they also incorporate many electromechanical structures, making the overall structure quite complex and hindering stable operation, thus significantly reducing reliability.

[0006] Therefore, there is an urgent need for a flow-adjustable solid particle generator to address, to some extent, the technical problems existing in the current technology. Summary of the Invention

[0007] The purpose of this application is to provide a flow-adjustable solid particle generator, which can adjust the flow rate of tracer particles to a certain extent, so that the tracer particles can be evenly distributed in the flow field and the problem of clumping between tracer particles is not easily formed.

[0008] This application provides a flow-adjustable solid particle generator, including a cylinder, an annular baffle, and an adjustable baffle assembly;

[0009] The cylindrical body is surrounded by a sealed cavity, and the annular baffle is disposed inside the cylindrical body, such that the annular baffle divides the sealed cavity into an upper cavity and a lower cavity for storing tracer particles;

[0010] The cylinder has at least one first inlet hole, at least one second inlet hole, and at least one outlet hole; a first gas can be introduced into the upper cavity through the first inlet hole, and a second gas for mixing with the tracer particles can be introduced into the lower cavity through the second inlet hole; by adjusting the gas flow rates of the first gas and the second gas, the gas flow rate ratio of the first gas and the second gas mixed with the tracer particles can be adjusted.

[0011] A conductive channel is formed on the annular baffle. The adjustable baffle assembly is disposed on the annular baffle and the adjustable baffle assembly can adjust the cross-sectional area of ​​the conductive channel to adjust the flow rate of the second gas mixed with the tracer particles in the lower cavity to the upper cavity, thereby increasing the concentration of the tracer particles discharged from the outlet hole.

[0012] In the above technical solution, the flow-adjustable solid particle generator further includes a first guide pipe, one end of which is connected to the second inlet hole, and the other end passes through the annular baffle along the axial direction of the cylinder and is connected to the lower cavity;

[0013] An annular gap is formed between the first guide pipe and the guide channel. The adjustable baffle assembly can adjust the cross-sectional area of ​​the annular gap to adjust the airflow rate of the second gas mixed with the tracer particles in the lower cavity to the upper cavity.

[0014] In the above technical solution, the adjustable baffle assembly further includes a driving component and blades;

[0015] The blades are provided in multiple ways, and the multiple blades are arranged sequentially along the circumferential direction of the first flow guide pipe;

[0016] The portion of the blade near the first guide pipe can conform to the shape of the first guide pipe;

[0017] The output end of the drive component is connected to the blade and can drive the blade to open the annular gap or drive the blade to fit against the first guide pipe to seal the annular gap, so that the blade can adjust the cross-sectional area of ​​the annular gap.

[0018] In the above technical solution, the driving component further includes a fixed disk, a first gear, a second gear, and a handle;

[0019] The fixed plate is disposed above the annular baffle, and a through hole is provided on the fixed plate. An annular gap is formed between the through hole and the first guide pipe. The second gear is fixedly disposed on the fixed plate, and the first gear meshes with the second gear and is connected to the handle on the cylinder through a drive shaft.

[0020] The fixed disk has a first protrusion on the side facing the lower cavity, and the blade has a first elongated groove on the side facing the upper cavity. The blade is disposed between the fixed disk and the annular baffle. One side of the blade is movably connected to the fixed disk through the first protrusion and the first elongated groove, and the other side of the blade is slidably disposed on the annular baffle.

[0021] Rotating the handle causes the fixed plate to rotate through the meshing of the first gear and the second gear. When the fixed plate rotates, the first protrusion and the first elongated groove allow the blade to open or seal the annular gap.

[0022] In the above technical solution, the first guide pipe is in the shape of a regular prism, and the number of blades is the same as the number of sides of the bottom surface of the first guide pipe.

[0023] In the above technical solution, the first guide pipe is in the shape of an octagonal prism, and there are 8 blades; the blades are isosceles triangles, and at least a portion of the sidewall with the vertex end can fit into the sidewall of the first guide pipe.

[0024] The blade has a second protrusion on the side facing the lower cavity, and the annular baffle has a second elongated groove on the side facing the upper cavity that corresponds to the blade. The second protrusion can slide within the second elongated groove.

[0025] The axis of the first elongated groove is collinear with the height of the blade, the axis of the first elongated groove is perpendicular to the axis of the second protrusion, and the axis of the second protrusion is parallel to the axis of the second elongated groove.

[0026] In the above technical solution, the flow-adjustable solid particle generator further includes a swirling assembly disposed in the lower cavity;

[0027] The swirl assembly has multiple swirl vanes, which are arranged sequentially along the circumferential direction of the first guide pipe, and guide grooves are formed between adjacent swirl vanes.

[0028] The first guide pipe is connected to the guide groove, so that the second gas passing through the first guide pipe can be introduced into the lower cavity through the guide groove.

[0029] In the above technical solution, the swirl vane has a preset height in the axial direction of the first guide pipe and extends in the radial direction of the first guide pipe.

[0030] The swirl vane has a first sidewall and a second sidewall that are arranged opposite each other in the circumferential direction of the first guide pipe. Both the first sidewall and the second sidewall have curvature, and the curvature of the first sidewall is greater than that of the second sidewall, so that the guide groove is an arc-shaped groove.

[0031] In the above technical solution, the flow-adjustable solid particle generator further includes a gas collection hood;

[0032] The gas collection hood has a cylindrical structure;

[0033] The gas collecting hood is disposed in the lower cavity, and the gas collecting hood is coaxial with the lower cavity;

[0034] The gas collecting hood surrounds a first installation space, and the swirling component is disposed in the first installation space.

[0035] In the above technical solution, the flow-adjustable solid particle generator further includes a protective cover;

[0036] The protective cover is fastened to the fixed plate, and a second installation space is provided between the cover and the fixed plate. The second installation space is used to place the first gear and the second gear.

[0037] Compared with the prior art, the beneficial effects of this application are as follows:

[0038] This application provides a flow-adjustable solid particle generator, including a cylinder, an annular baffle, and an adjustable baffle assembly;

[0039] The cylindrical body is surrounded by a sealed cavity, and the annular baffle is disposed inside the cylindrical body, such that the annular baffle divides the sealed cavity into an upper cavity and a lower cavity for storing tracer particles;

[0040] The cylinder has at least one first inlet hole, at least one second inlet hole, and at least one outlet hole; a first gas can be introduced into the upper cavity through the first inlet hole, and a second gas for mixing with the tracer particles can be introduced into the lower cavity through the second inlet hole; by adjusting the gas flow rates of the first gas and the second gas, the gas flow rate ratio of the first gas and the second gas mixed with the tracer particles can be adjusted.

[0041] A conductive channel is formed on the annular baffle. The adjustable baffle assembly is disposed on the annular baffle and the adjustable baffle assembly can adjust the cross-sectional area of ​​the conductive channel to adjust the flow rate of the second gas mixed with the tracer particles in the lower cavity to the upper cavity, thereby increasing the concentration of the tracer particles discharged from the outlet hole.

[0042] In summary, gas is introduced into the upper chamber through the first inlet hole and into the lower chamber through the second inlet hole. By adjusting the ratio of the gas intake to the upper and lower chambers, the flow rate of the gas containing tracer particles is controlled, thereby adjusting the concentration of tracer particles in the gas at the outlet hole. In addition, by adjusting the cross-sectional area of ​​the conductive channel, the flow rate ratio of the gas containing tracer particles can be adjusted, thereby adjusting the concentration of tracer particles in the gas at the outlet hole. This application adopts a two-stage flow regulation method, resulting in a better final regulation effect. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of the flow-adjustable solid particle generator provided in the embodiments of this application;

[0045] Figure 2 A cross-sectional view of a flow-adjustable solid particle generator provided in an embodiment of this application;

[0046] Figure 3 A schematic diagram of the cylinder in the flow-adjustable solid particle generator provided in the embodiments of this application from a first-view perspective;

[0047] Figure 4 A schematic diagram of the cylinder in the flow-adjustable solid particle generator provided in the embodiments of this application, viewed from a second perspective.

[0048] Figure 5A schematic diagram of the cylinder in the flow-adjustable solid particle generator provided in the embodiments of this application from a third-view perspective;

[0049] Figure 6 This is a schematic diagram of the structure of the adjustable flow solid particle generator provided in this application, showing the hidden cylinder, gas collection hood, and protective cover from a first-view perspective.

[0050] Figure 7 This is a schematic diagram of the structure of the adjustable flow solid particle generator provided in this application, showing the hidden cylinder, gas collection hood, and protective cover from a second perspective.

[0051] Figure 8 A schematic diagram of the fixed disk in the flow-adjustable solid particle generator provided in the embodiments of this application from a first-view perspective;

[0052] Figure 9 A schematic diagram of the fixed disk in the flow-adjustable solid particle generator provided in the embodiments of this application from a second perspective;

[0053] Figure 10 A schematic diagram of the blades in the flow-adjustable solid particle generator provided in the embodiments of this application, viewed from a first perspective.

[0054] Figure 11 A schematic diagram of the blades in the flow-adjustable solid particle generator provided in the embodiments of this application from a second perspective;

[0055] Figure 12 A schematic diagram of the hidden cylinder in the flow-adjustable solid particle generator provided in this application embodiment, viewed from a first perspective.

[0056] Figure 13 A schematic diagram of the hidden cylinder in the flow-adjustable solid particle generator provided in the embodiments of this application, viewed from a second perspective;

[0057] Figure 14 A schematic diagram of the swirling component in the flow-adjustable solid particle generator provided in this application embodiment, viewed from a first perspective;

[0058] Figure 15 A schematic diagram of the swirling component in the flow-adjustable solid particle generator provided in the embodiments of this application from a second perspective;

[0059] Figure 16 A schematic diagram of the swirling component in the flow-adjustable solid particle generator provided in the embodiments of this application from a third-view perspective;

[0060] Figure 17 A schematic diagram of the protective shield in the flow-adjustable solid particle generator provided in this application embodiment, viewed from a first perspective;

[0061] Figure 18 A schematic diagram of the protective shield in the flow-adjustable solid particle generator provided in the embodiments of this application, viewed from a second perspective.

[0062] Figure 19 A half-sectional view of a flow-adjustable solid particle generator provided in an embodiment of this application;

[0063] Figure 20 A schematic diagram illustrating the conditions satisfied by the blades and the conduction channel provided in the embodiments of this application.

[0064] Reference numerals: 1-Cylinder; 2-Upper cover; 3-Bottom cover; 4-Annular baffle; 5-Adjustable baffle assembly; 6-Upper cavity; 7-Lower cavity; 8-First inlet hole; 9-Second inlet hole; 10-Outlet hole; 11-Conducting channel; 12-First guide pipe; 13-Annular seam; 14-Driving component; 15-Blade; 16-Fixing disc; 17-First gear; 18-Second gear; 22-Handle; 23-Through hole; 24-Guide groove; 25-Second guide pipe; 27-First protrusion; 28-First elongated groove; 29-Second protrusion; 30 - Second elongated groove; 31- Swirl assembly; 32- Swirl vane; 33- Guide groove; 34- First sidewall; 35- Second sidewall; 36- Gas collection hood; 37- First installation space; 38- Protective cover; 39- Second installation space; 40- First cylinder; 41- Second cylinder; 42- Top cover; 43- First through hole; 44- Drive shaft; 45- Base; 46- Bottom ring; 47- Flow hole; 48- Connection hole; 49- Cylinder body; 50- Pressure reducing valve mounting port; 51- Second through hole; 52- Outlet surface; 53- Initial position; 54- Termination position. Detailed Implementation

[0065] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0066] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0067] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0068] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0069] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0070] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0071] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0072] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0073] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0074] The following is combined with Figures 1-20 As shown, this application provides a detailed description of a flow-adjustable solid particle generator.

[0075] This embodiment provides a flow-adjustable solid particle generator, which includes a cylinder 1, an annular baffle 4, and an adjustable baffle assembly 5.

[0076] Specifically, in combination Figure 1 , Figure 3 , Figure 4 as well as Figure 5 As shown, the cylinder 1 includes a cylinder body 49, an upper cover 2, and a bottom cover 3. The upper cover 2 and the bottom cover 3 are respectively disposed at both ends of the cylinder body 49 along the axial direction, so that the cylinder body 49, the upper cover 2, and the bottom cover 3 can form a sealed cavity. Preferably, the cylinder body 49 is cylindrical. Preferably, the upper cover 2 and the bottom cover 3 are provided with connecting holes 48 spaced apart along the circumference of the cylinder body 49. By inserting bolts into the connecting holes 48, the upper cover 2 and the bottom cover 3 are fixed to the cylinder body 49.

[0077] Specifically, in combination Figure 2 and Figure 3 As shown, an annular baffle 4 is disposed inside the cylinder 1, and a conductive channel 11 is formed on the annular baffle 4; preferably, the annular baffle 4 is disposed in the middle of the cylinder 1; the annular baffle 4 is used to divide the sealed cavity into an upper cavity 6 and a lower cavity 7 for storing tracer particles.

[0078] Specifically, the upper cover 2 of the cylinder 1 has at least one first inlet hole 8, at least one second inlet hole 9, and at least one outlet hole 10; a first gas, which is pure air, can be introduced into the upper cavity 6 through the first inlet hole 8; a second gas for mixing with tracer particles can be introduced into the lower cavity 7 through the second inlet hole 9; by adjusting the gas flow rates of the first gas and the second gas, the gas flow rate ratio of the first gas and the second gas mixed with tracer particles can be adjusted. Preferably, combined with Figure 1 As shown, one each of the first inlet hole 8, the second inlet hole 9, and the outlet hole 10 is provided. Preferably, combined with Figure 7 As shown, the first inlet hole 8 is connected to the upper cavity 6 through the second guide pipe 25; preferably, the upper cover 2 of the cylinder 1 is also provided with a pressure reducing valve installation port 50, which is used to install a pressure reducing valve and adjust the airflow pressure in the cylinder 1 by means of the pressure reducing valve.

[0079] Furthermore, by dividing the cylinder 1 into an upper chamber 6 and a lower chamber 7 via an annular baffle 4, the flow rate ratio of the gas containing tracer particles to the gas flow rate without tracer particles can be adjusted in a single step. In actual use, the incoming flow consists of two gas streams: one stream is introduced into the upper chamber 6 through the first inlet port 8, and the other stream is introduced into the lower chamber 7 through the second inlet port 9. The gas stream introduced into the lower chamber 7 can be fully mixed with the tracer particles placed there, and then mixed with the pure air in the upper chamber 6 through the guide channel 11. Finally, the mixed gas is output to the experimental flow field of PIV through the outlet port 10. Therefore, by adjusting the input gas flow rate of the first inlet port 8 and the second inlet port 9, the gas flow rates of the upper and lower chambers can be adjusted, that is, the ratio of the gas flow rate containing tracer particles to the gas flow rate without particles can be adjusted, thereby adjusting the concentration of the gas containing tracer particles in the final mixed gas.

[0080] Specifically, in combination Figure 2 and Figure 3 As shown, the adjustable baffle assembly 5 is disposed on the annular baffle 4 and the adjustable baffle assembly 5 can adjust the cross-sectional area of ​​the conduction channel 11 to adjust the flow rate of the second gas mixed with tracer particles in the lower cavity 7 to the upper cavity 6, thereby adjusting the concentration of tracer particles discharged from the outlet hole 10.

[0081] Furthermore, the adjustable baffle assembly 5 enables secondary adjustment of the tracer particle concentration at the outlet port 10. In practical use, the cross-sectional area of ​​the guiding channel 11 can be adjusted using the adjustable baffle assembly 5. Different cross-sectional areas of the guiding channel 11 result in different amounts of airflow flowing from the lower chamber 7 to the upper chamber 6. The larger the cross-sectional area of ​​the guiding channel 11, the greater the gas flow rate from the lower chamber 7 to the upper chamber 6, thereby increasing the proportion of gas containing tracer particles and thus increasing the tracer particle concentration in the final output airflow. Furthermore, the adjustable baffle assembly 5 can completely seal the cross-section of the guiding channel 11, at which point no airflow will flow from the lower chamber 7 to the upper chamber 6, resulting in a final output airflow of pure air. When the cross-sectional area of ​​the guiding channel 11 is at its maximum, the gas from the lower chamber 7 is completely introduced into the upper chamber 6, at which point the tracer particle concentration in the final output airflow reaches its maximum value.

[0082] In summary, gas is introduced into the upper chamber 6 through the first inlet hole 8, and gas is introduced into the lower chamber 7 through the second inlet hole 9. By adjusting the ratio of the gas intake of the upper chamber 6 and the lower chamber 7, the flow rate of the gas containing tracer particles is controlled, thereby adjusting the concentration of tracer particles in the gas at the outlet hole 10. In addition, the ratio of the flow rate of the gas containing tracer particles can be adjusted by adjusting the cross-sectional area of ​​the conductive channel 11, thereby adjusting the concentration of tracer particles in the gas at the outlet hole 10. This application adopts a two-stage flow regulation method, which makes the final regulation effect better.

[0083] It is worth noting that the above description is based on the second inlet hole 9 being located on the upper cover 2. However, in actual use, the second inlet hole 9 can also be located on the bottom cover 3 or on the side wall of the lower cavity 7 of the cylinder 1, as long as it can allow gas to be introduced into the lower cavity 7 through the second inlet hole 9.

[0084] In this embodiment, combined with Figure 6 As shown, with the second inlet hole 9 set on the upper cover 2 as a reference, the flow-adjustable solid particle generator also includes a first guide pipe 12. One end of the first guide pipe 12 is connected to the second inlet hole 9, and the other end passes through the conduction channel 11 of the annular baffle 4 along the axial direction of the cylinder 1 and is connected to the lower cavity 7. An annular gap 13 is formed between the first guide pipe 12 and the conduction channel 11 of the annular baffle 4. The adjustable baffle assembly 5 can adjust the cross-sectional area of ​​the annular gap 13 to adjust the flow rate of the second gas mixed with tracer particles in the lower cavity 7 to the upper cavity 6.

[0085] In practical use, the cross-sectional area of ​​the annular slit 13 can be adjusted using the adjustable baffle assembly 5. Different cross-sectional areas of the annular slit 13 allow for different amounts of airflow entering from the lower chamber 7 to the upper chamber 6. The larger the cross-sectional area of ​​the annular slit 13, the greater the gas flow rate from the lower chamber 7 to the upper chamber 6, thereby increasing the proportion of gas containing tracer particles and thus increasing the tracer particle concentration in the final output airflow. Furthermore, the adjustable baffle assembly 5 can completely seal the cross-section of the annular slit 13, at which point no airflow will enter from the lower chamber 7 to the upper chamber 6, and the final output airflow will be pure air. When the cross-sectional area of ​​the annular slit 13 is at its maximum, the gas in the lower chamber 7 is completely introduced into the upper chamber 6, and the tracer particle concentration in the final output airflow will reach its maximum value.

[0086] In this embodiment, combined with Figures 6-11 As shown, the adjustable baffle assembly 5 includes a drive member 14 and a blade 15.

[0087] Specifically, multiple blades 15 are provided, and the multiple blades 15 are arranged sequentially along the circumferential direction of the first guide pipe 12; the part of the blade 15 near the first guide pipe 12 can conform to the shape of the first guide pipe 12; the output end of the drive member 14 is connected to the blade 15 and can drive the blade 15 to open the annular gap 13 or drive the blade 15 to conform to the sealing annular gap 13 of the first guide pipe 12, so that the blade 15 can adjust the cross-sectional area of ​​the annular gap 13.

[0088] It is worth noting that: the shape of the first guide pipe 12 is not specifically limited here, nor is the shape of the blade 15; the first guide pipe 12 can be cylindrical or regular prism; when the first guide pipe 12 is cylindrical, at least part of the blade 15 near the first guide pipe 12 has a curved sidewall, which can ensure that the blade 15 conforms to the shape of the first guide pipe 12, that is, there is a possibility that the blade 15 can completely seal the annular gap 13; the number of blades 15 can be calculated according to actual needs.

[0089] The following describes in detail the specific structure of the adjustable baffle assembly 5 when the first guide pipe 12 is a regular prism.

[0090] Specifically, the first guide pipe 12 is in the shape of a regular octagonal prism, and there are 8 blades 15; the blades 15 are isosceles triangles with a vertex angle of 45°, and at least a portion of the sidewall forming the vertex angle can fit into the sidewall of the first guide pipe 12.

[0091] Specifically, the drive component 14 includes a fixed disk 16, a first gear 17, a second gear 18, and a handle 22. Among these, [the following is a description of the combination of these components]. Figure 6 , Figure 7 and Figure 8As shown, the fixed plate 16 is positioned above the annular baffle 4. A through hole 23 is provided on the fixed plate 16, and an annular seam 13 can be formed between the through hole 23 and the first guide pipe 12 (the diameter of the annular seam 13 formed between the guide pipe and the first guide pipe 12 is the same). The second gear 18 is fixedly positioned on the side of the fixed plate 16 facing the upper cavity 6, i.e., the second gear 18 is fixed using the fixed plate 16. The second gear 18 can be fixed to the fixed plate 16 by welding or integrally with the fixed plate 16. The molding process ensures that the second gear 18 and the fixed disk 16 can move in tandem, meaning that when the second gear 18 rotates, the fixed disk 16 rotates along with the second gear 18. The handle 22 is located above the upper cover 2 and is connected to the first gear 17 inside the cylinder 1 (the first gear 17 is also located on the side of the fixed disk 16 facing the upper cavity 6) via the transmission shaft 44. The first gear 17 meshes with the second gear 18, meaning that when the handle 22 is rotated, the meshing action of the first gear 17 and the second gear 18 can drive the fixed disk 16 to rotate.

[0092] Specifically, in combination Figure 9 As shown, the fixed disk 16 has eight first protrusions 27 on the side facing the lower cavity 7 (each of the eight first protrusions 27 corresponds to one of the eight blades 15), and the first protrusions 27 are cylindrical; combined with Figure 8 As shown, the fixed disk 16 has an annular guide groove 24 on the side facing the upper cavity 6. The drive shaft 44 can extend from the upper cover 2 along the axis of the cylinder 1 to the guide groove 24. When the fixed disk 16 rotates, the drive shaft 44 rotates relative to the guide groove 24.

[0093] Specifically, the blade 15 is positioned between the fixed disk 16 and the annular baffle 4; combined with Figure 10 As shown, a first elongated groove 28 is provided on the side of the blade 15 facing the fixed disk 16. The bottom wall of the first elongated groove 28 is an inclined surface, with the side near the apex of the blade 15 being higher than the side away from the apex of the blade 15. The first elongated groove 28 corresponds to the first protrusion 27, meaning that the side of the blade 15 facing the fixed disk 16 is movably connected to the fixed disk 16 through the cooperation of the first protrusion 27 and the first elongated groove 28. Figure 11 As shown, the blade 15 has a second protrusion 29 on the side facing the annular baffle 4; combined with Figure 3As shown, the annular baffle 4 has a second elongated groove 30 on the side facing the upper cavity 6, which corresponds to the eight blades 15 one by one. The second protrusion 29 can slide in the second elongated groove 30 (the length of the second elongated groove 30 is greater than the length of the second protrusion 29). The axis of the first elongated groove 28 is collinear with the height of the blade 15. The axis of the first elongated groove 28 is perpendicular to the axis of the second protrusion 29. The axis of the second protrusion 29 is parallel to the axis of the second elongated groove 30.

[0094] In actual use, rotating the handle 22 clockwise generates force through the transmission shaft 44. The meshing of the first gear 17 and the second gear 18 drives the fixed disk 16 to rotate counterclockwise. During the counterclockwise rotation of the fixed disk 16, the first protrusion 27 moves from the initial position 53 to the final position 54, causing the blades 15 to move counterclockwise (ultimately forming multiple blades 15 to open). When the blades 15 move counterclockwise, the second protrusion 29 moves linearly within the second elongated groove 30. The whole process causes the blades 15 to open the annular seam 13, and conversely, to seal the annular seam 13.

[0095] It is worth noting that: (1) The aforementioned drive component 14 uses the meshing of the first gear 17 and the second gear 18. By changing the size, shape, and position of the gears, or by replacing the gears with other rotating parts, such as belts, the rotational transmission of the fixed disc 16 can also be achieved, which is also within the scope of protection of this application. (2) The aforementioned handle 22 mainly serves a rotational function. By changing the shape of the handle 22 to other shapes, or by using other rotational methods such as pins to replace the handle 22 to achieve the rotational function, it is also within the scope of protection of this application. (3) The blade 15 adopts a triangular design with the bottom edge cut off. The cutting off refers to the removal of a portion of the two bottom feet of the triangular blade 15 to ensure that when the blade 15 opens the annular seam 13, there will be no interference between the bottom feet of the blade 15 and the inner wall of the cylinder 1. In addition, the blade 15 can also be strip-shaped, etc.

[0096] In summary, through the force transmission relationship of handle 22-drive shaft 44-first gear 17-second gear 18, the drive component 14 can be located outside the cylinder 1, allowing for convenient adjustment from outside the cylinder 1. By rotating handle 22, the first gear 17 and the second gear 18 are driven, which in turn drive the fixed plate 16. The first protrusion 27 of the fixed plate 16 cooperates with the first elongated groove 28 on the blade 15, and the widths are also consistent. This allows the rotation of the fixed plate 16 to drive the blade 15 to perform reciprocating translational motion, thereby changing the opening and closing degree of the circumferential slit 13. This change is used to adjust the amount of gas flowing from the lower cavity 7 to the upper cavity 6.

[0097] In this embodiment, combined with Figures 14-16As shown, the flow-adjustable solid particle generator also includes a swirling assembly 31 disposed in the lower cavity 7.

[0098] Specifically, the swirl assembly 31 has a plurality of swirl vanes 32, which are arranged sequentially along the circumferential direction of the first guide pipe 12, and a guide groove 33 is formed between adjacent swirl vanes 32; the first guide pipe 12 is connected to the guide groove 33, so that the second gas passing through the first guide pipe 12 can be introduced into the lower chamber 7 through the guide groove 33.

[0099] Furthermore, the swirling assembly 31 is disposed in the lower cavity 7 and located on the bottom wall of the lower cavity 7; the swirling assembly 31 includes a base 45 and a bottom ring 46; the base 45 is cylindrical, the bottom ring 46 is disposed inside the base 45, and a stepped structure is formed between the bottom ring 46 and the base 45, which is used to receive the first guide pipe 12; in addition, the bottom ring 46 has a flow hole 47 connected to the first guide pipe 12; the swirling vanes 32 are disposed on the side of the base 45 facing the lower cavity 7, and the guide grooves 33 between adjacent swirling vanes 32 are connected to the flow hole 47, that is, the second gas introduced through the first guide pipe 12 passes through the flow hole 47 and multiple guide grooves 33 in sequence to the lower cavity 7, and different airflows flow out in an arc from different guide grooves 33, thereby achieving the swirling effect.

[0100] More specifically, the swirl vane 32 has a preset height in the axial direction of the first guide pipe 12 and extends in the radial direction of the first guide pipe 12; the swirl vane 32 has a first sidewall 34 and a second sidewall 35 arranged opposite to each other in the circumferential direction of the first guide pipe 12, both the first sidewall 34 and the second sidewall 35 have curvature, and the curvature of the first sidewall 34 is greater than that of the second sidewall 35, so that the guide groove is an arc-shaped groove.

[0101] Furthermore, the curvature of the first sidewall 34 and the second sidewall 35 can be adjusted according to actual needs, thereby controlling the radial and tangential velocities at the outlet of the guide channel. This can generate airflows with different degrees of turbulence, resulting in better swirling flow. This allows for more thorough mixing of the tracer particles with the airflow (second gas), and the tracer particles can be well dispersed in the airflow without easily causing agglomeration.

[0102] Furthermore, the hydrocyclone uses an arc-shaped channel, and the outlet surface 52 is approximately a rectangle with a length of 3 mm and a width of 1 mm. By changing the shape, size, tilt angle, or other aspects of the outlet surface 52, or by changing the arc curvature or other styles, the swirling effect of this application may also be achieved.

[0103] In summary, the arc-shaped groove can achieve a swirling effect on the second gas without relying on the control of other external devices. Compared with existing particle generators (which use an electronic control system to control airflow and achieve airflow turbulence or regulation), this application does not have complex electronic control and does not rely on a power system in use. Therefore, while ensuring the proper functioning of the system, the overall system has high reliability.

[0104] In this embodiment, combined with Figure 12 and Figure 13 As shown, the flow-adjustable solid particle generator also includes a gas collection hood 36.

[0105] Specifically, the gas collecting hood 36 has a cylindrical structure; the gas collecting hood 36 is disposed in the lower cavity 7, and the gas collecting hood 36 and the lower cavity 7 are coaxial. In addition, the cross-sectional diameter of the gas collecting hood 36 is larger than the cross-sectional diameter of the guiding channel 11, that is, the gas collecting hood 36 will not affect the guiding area of ​​the guiding channel 11.

[0106] Specifically, the gas collecting hood 36 is surrounded by a first installation space 37, and the swirling assembly 31 is disposed in the first installation space 37.

[0107] In summary, by using the gas collecting hood 36 to constrain the movement range of the airflow in the lower chamber 7, the size of the lower chamber 7 is reduced, making the space of the lower chamber 7 smaller. Under the same gas flow rate, a greater gas flow velocity can be generated, so that the gas flowing upward in the lower chamber 7 has a faster speed, and thus can be mixed more thoroughly when it meets the gas in the upper chamber 6.

[0108] In this embodiment, combined with Figure 12 and Figure 13 As shown, the flow-adjustable solid particle generator also includes a protective cover 38.

[0109] Specifically, the protective cover 38 is fastened to the fixed plate 16, and a second mounting space 39 is formed between the protective cover 38 and the fixed plate 16. The second mounting space 39 is used to place the first gear 17 and the second gear 18. The protective cover 38 can prevent the deposited particles generated during the gas mixing process between the upper chamber 6 and the lower chamber 7 from falling into the first gear 17 and the second gear 18, and prevent the first gear 17 and the second gear 18 from meshing and getting stuck.

[0110] Furthermore, combined Figure 17 and Figure 18As shown, the protective cover 38 includes a first cylinder 40, a second cylinder 41, a top cover 42, a first through hole 43, and a second through hole 51; wherein the second cylinder 41 is fitted onto the first cylinder 40, and the first cylinder 40 and the second cylinder 41 are connected by the top cover 42 on the side closest to the top cover 2; the first cylinder 40 has a second through hole 51 formed therein, the second through hole 51 is used for the first guide pipe 12 to pass through, and a gap is formed between the second through hole 51 and the first guide pipe 12; the top cover 42 also has a first through hole 43, the first through hole 43 is used for the drive shaft 44 to pass through.

[0111] In the actual connection process, the first cylinder 40, the second cylinder 41 and the top cover 42 form a cylindrical structure, which is then fastened to the fixing plate 16, and a second installation space 39 is provided between them and the fixing plate 16.

[0112] It is worth noting that the aforementioned protective cover 38 and gas collection cover 36 both preferably adopt a thin cylindrical design, and other designs of different sizes and shapes are also within the scope of protection of this application.

[0113] In this embodiment, combined with Figure 20 As shown, assuming the blade 15 is an isosceles triangle ABC with height H, the diameter of the conduction channel 11 is R, and the width of the second elongated groove 30 is L, then H, R, and L satisfy the following relationship: H = R + L.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A flow-adjustable solid particle generator, characterized in that, Includes a cylindrical body, an annular baffle, and an adjustable baffle assembly; The cylindrical body is surrounded by a sealed cavity, and the annular baffle is disposed inside the cylindrical body, such that the annular baffle divides the sealed cavity into an upper cavity and a lower cavity for storing tracer particles; The cylinder has at least one first inlet hole, at least one second inlet hole, and at least one outlet hole; a first gas can be introduced into the upper cavity through the first inlet hole, and a second gas for mixing with the tracer particles can be introduced into the lower cavity through the second inlet hole; by adjusting the gas flow rates of the first gas and the second gas, the gas flow rate ratio of the first gas and the second gas mixed with the tracer particles can be adjusted. A conductive channel is formed on the annular baffle. The adjustable baffle assembly is disposed on the annular baffle and the adjustable baffle assembly can adjust the cross-sectional area of ​​the conductive channel to adjust the flow rate of the second gas mixed with the tracer particles in the lower cavity to the upper cavity, thereby adjusting the concentration of the tracer particles discharged from the outlet hole.

2. The flow-adjustable solid particle generator according to claim 1, characterized in that, The flow-adjustable solid particle generator further includes a first guide pipe, one end of which is connected to the second inlet hole, and the other end of which passes through the annular baffle along the axial direction of the cylinder and is connected to the lower cavity; An annular gap is formed between the first guide pipe and the guide channel. The adjustable baffle assembly can adjust the cross-sectional area of ​​the annular gap to adjust the airflow rate of the second gas mixed with the tracer particles in the lower cavity to the upper cavity.

3. The flow-adjustable solid particle generator according to claim 2, characterized in that, The adjustable baffle assembly includes a drive component and blades; The blades are provided in multiple ways, and the multiple blades are arranged sequentially along the circumferential direction of the first flow guide pipe; The portion of the blade near the first guide pipe can conform to the shape of the first guide pipe; The output end of the drive component is connected to the blade and can drive the blade to open the annular gap or drive the blade to fit against the first guide pipe to seal the annular gap, so that the blade can adjust the cross-sectional area of ​​the annular gap.

4. The flow-adjustable solid particle generator according to claim 3, characterized in that, The driving component includes a fixed disk, a first gear, a second gear, and a handle; The fixed plate is disposed above the annular baffle, and a through hole is provided on the fixed plate. An annular gap is formed between the through hole and the first guide pipe. The second gear is fixedly disposed on the fixed plate, and the first gear meshes with the second gear and is connected to the handle on the cylinder through a drive shaft. The fixed disk has a first protrusion on the side facing the lower cavity, and the blade has a first elongated groove on the side facing the upper cavity. The blade is disposed between the fixed disk and the annular baffle. One side of the blade is movably connected to the fixed disk through the first protrusion and the first elongated groove, and the other side of the blade is slidably disposed on the annular baffle. Rotating the handle causes the fixed plate to rotate through the meshing of the first gear and the second gear. When the fixed plate rotates, the first protrusion and the first elongated groove allow the blade to open or seal the annular gap.

5. The flow-adjustable solid particle generator according to claim 4, characterized in that, The first guide pipe is in the shape of a regular prism, and the number of blades is the same as the number of sides of the bottom surface of the first guide pipe.

6. The flow-adjustable solid particle generator according to claim 5, characterized in that, The first flow guide pipe is in the shape of an octagonal prism, and there are 8 blades; the blades are isosceles triangles, and at least a portion of the sidewall with the vertex end can fit into the sidewall of the first flow guide pipe. The blade has a second protrusion on the side facing the lower cavity, and the annular baffle has a second elongated groove on the side facing the upper cavity that corresponds to the blade. The second protrusion can slide within the second elongated groove. The axis of the first elongated groove is collinear with the height of the blade, the axis of the first elongated groove is perpendicular to the axis of the second protrusion, and the axis of the second protrusion is parallel to the axis of the second elongated groove.

7. The flow-adjustable solid particle generator according to claim 2, characterized in that, The flow-adjustable solid particle generator also includes a swirling assembly disposed in the lower cavity; The swirl assembly has multiple swirl vanes, which are arranged sequentially along the circumferential direction of the first guide pipe, and guide grooves are formed between adjacent swirl vanes. The first guide pipe is connected to the guide groove, so that the second gas passing through the first guide pipe can be introduced into the lower cavity through the guide groove.

8. The flow-adjustable solid particle generator according to claim 7, characterized in that, The swirl vane has a preset height in the axial direction of the first guide pipe and extends in the radial direction of the first guide pipe; The swirl vane has a first sidewall and a second sidewall that are arranged opposite to each other in the circumferential direction of the first guide pipe. Both the first sidewall and the second sidewall have curvature, and the curvature of the first sidewall is greater than that of the second sidewall, so that the guide groove is an arc-shaped groove.

9. The flow-adjustable solid particle generator according to claim 7, characterized in that, The adjustable flow solid particle generator also includes a gas collection hood; The gas collection hood has a cylindrical structure; The gas collecting hood is disposed in the lower cavity, and the gas collecting hood is coaxial with the lower cavity; The gas collecting hood surrounds a first installation space, and the swirling component is disposed in the first installation space.

10. The flow-adjustable solid particle generator according to claim 4, characterized in that, The adjustable flow solid particle generator also includes a protective cover; The protective cover is fastened to the fixed plate, and a second installation space is provided between the cover and the fixed plate. The second installation space is used to place the first gear and the second gear.

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