Internal feeding type winnowing device

Abstract

The invention belongs to the technical field of tobacco equipment, and discloses an inner feeding type winnowing device which is used for winnowing cut stems and comprises a shell and a spreader. Wherein the top of the shell is communicated with an air extractor, and the bottom of the shell is communicated with the outside, so that airflow flowing from the bottom to the top circulates in the shell. The spreader is arranged in an air inlet area at the bottom of the shell and is of a fusiform structure, the end, close to the bottom of the shell, of the spreader is a spreader part which is used for guiding airflow entering the shell to flow along the two sides of the spreader, and the end, away from the bottom of the shell, of the spreader is a flow stabilizing part which is used for stabilizing flow. The flow stabilizing part is used for guiding airflow on the two sides of the spreader to converge stably, and the spreader part and the flow stabilizing part are in smooth connection. According to the inner feeding type winnowing device, airflow can be prevented from forming vortex in the air inlet area at the bottom of the shell, the winnowing precision is improved, meanwhile, material accumulation is prevented, and the winnowing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of tobacco equipment technology, and more particularly to an internally fed air separator. Background Technology

[0002] In tobacco processing, air separation of tobacco stems utilizes the difference in suspension velocity between the stems and other impurities (such as dust, fibers, and unseparated tobacco stem particles) to achieve graded purification through a specific airflow field. Its core objective is to remove light impurities and substandard fragments from the stems, ensuring the purity and physical morphology of the stems and providing qualified raw materials for subsequent blending processes.

[0003] In the high-end tobacco sector (such as for slim cigarettes and cigar stems / stems), internal-feed air separators are widely used to reduce stem breakage and ensure the integrity of the material's physical form, thus reducing stem breakage and ensuring the material's physical integrity. Internal-feed air separators typically have air sources at both the top and bottom, allowing for two-stage air separation of the material. However, traditional internal-feed air separators suffer from uneven airflow distribution when separating light impurities (such as stems), leading to eddies in the bottom air intake area and reduced separation accuracy. While some existing internal-feed air separators use baffles to regulate bottom airflow, these baffle structures can cause material to accumulate above, requiring frequent shutdowns for cleaning and impacting continuous operation efficiency.

[0004] Therefore, there is an urgent need to design an internally fed air separator to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide an internally fed air separator that can prevent airflow from forming eddies in the air inlet area at the bottom of the housing, thereby improving air separation accuracy and preventing material accumulation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An internally fed air separator for air separating stems and filaments includes:

[0008] A housing, the top of which is connected to an air extraction device, and the bottom of which is connected to the outside, so that an airflow from bottom to top flows through the housing;

[0009] The flow divider is located in the air inlet area at the bottom of the housing. The flow divider has a spindle-shaped structure. The end of the flow divider closest to the bottom of the housing is the flow divider section, which is a rotating body with an outwardly convex curve. The cross-section of the flow divider section gradually increases along the airflow direction. The flow divider section is used to guide the airflow entering the housing to flow along both sides of the flow divider. The end of the flow divider furthest from the bottom of the housing is the flow stabilizer section, which is also a rotating body with an outwardly convex curve. The cross-section of the flow stabilizer section gradually decreases along the airflow direction. The flow stabilizer section is used to guide the airflow on both sides of the flow divider to merge stably. The flow divider section and the flow stabilizer section are smoothly connected.

[0010] Optionally, the housing includes an upper housing and a make-up air funnel, the large opening end of the make-up air funnel can be connected to the bottom of the upper housing, the small opening end of the make-up air funnel is connected to the outside, and the diversion shuttle is disposed inside the make-up air funnel.

[0011] Optionally, the axis of the diversion shuttle is collinear with the axis of the air supply funnel.

[0012] Optionally, the air supply funnel is sealed to the upper housing.

[0013] Optionally, a connecting component is provided between the diversion shuttle and the air supply funnel, the connecting component being used to fix the diversion shuttle.

[0014] Optionally, the connecting assembly includes a clamp, a connecting support, and a connector. The clamp is disposed on the diversion shuttle, the connecting support is disposed on the inner side wall of the air supply funnel, and the clamp and the connecting support are fixedly connected by the connector.

[0015] Optionally, three connecting supports and three connecting members are provided. The three connecting supports are evenly distributed along the circumference of the diversion shuttle, and the connecting members are connected to the connecting supports one by one.

[0016] Optionally, the flow divider further includes a connecting part located between the flow divider and the flow stabilizer, and the clamp is disposed on the connecting part.

[0017] Optionally, the cross-section of the connecting part is a streamlined curved surface, the connecting part is smoothly connected to the flow splitting part, and the connecting part is smoothly connected to the flow stabilizing part.

[0018] Optionally, the cross-sectional shapes of the flow splitter, the flow stabilizer, and the connecting part are all obtained through CFD simulation.

[0019] The beneficial effects of this invention are:

[0020] The internally fed air separator provided by this invention reduces the impact and separation of airflow when it enters the air-dividing shuttle area by setting a shuttle-shaped structure in the air-inlet area at the bottom of the housing, thus preventing the formation of vortices in the airflow in the air-inlet area at the bottom of the housing and improving air-separation accuracy. At the same time, the falling material will not accumulate when passing through the air-dividing shuttle, thereby improving operating efficiency. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the internally fed air separator provided in an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the housing provided in an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of the diversion shuttle provided in an embodiment of the present invention;

[0024] Figure 4 This is a top view of the diversion shuttle provided in an embodiment of the present invention;

[0025] Figure 5 This is a top view of the diversion shuttle, the air supply funnel, and the connecting assembly provided in an embodiment of the present invention;

[0026] Figure 6 This is a top view of the clamp provided in an embodiment of the present invention;

[0027] Figure 7 yes Figure 1 A magnified view of a portion of point A in the middle.

[0028] In the picture:

[0029] 1. Shell; 11. Upper shell; 111. Air separator outlet; 112. Mounting port; 113. Narrow waist; 114. First air separator chamber; 115. Second air separator chamber; 12. Make-up air funnel;

[0030] 2. Feed pipe; 21. Feed end; 22. Discharge end;

[0031] 3. Flow splitter; 31. Flow splitter section; 32. Flow stabilizing section; 33. Connecting section;

[0032] 4. Connecting components; 41. Clamp; 411. Clamp plate; 4111. Butt lug; 412. Fastening bolt; 42. Connecting support; 43. Connecting piece;

[0033] 5. Seals; 6. Frame. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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 invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] like Figure 1As shown, this embodiment provides an internally fed air separator for air separation of stems and filaments. It includes a housing 1 and a diverter 3. The top of the housing 1 is connected to an air extraction device, and the bottom of the housing 1 is connected to the outside, allowing airflow from bottom to top to circulate within the housing 1. The diverter 3 is located in the air inlet area at the bottom of the housing 1. The diverter 3 has a spindle-shaped structure. The end of the diverter 3 near the bottom of the housing 1 is a diverter section 31, which is a rotating body with an outwardly convex curve. The cross-section of the diverter section 31 gradually increases along the airflow direction. The diverter section 31 guides the airflow entering the housing 1 to flow along both sides of the diverter 3. The end of the diverter 3 away from the bottom of the housing 1 is a flow stabilizing section 32, which is also a rotating body with an outwardly convex curve. The cross-section of the flow stabilizing section 32 gradually decreases along the airflow direction. The flow stabilizing section 32 guides the stable convergence of the airflow on both sides of the diverter 3. The diverter section 31 and the flow stabilizing section 32 are smoothly connected.

[0039] Specifically, the flow divider 31 is a rotating structure formed by rotating a curve that gradually bulges outward in an upward inclined direction, with the vertical line where the starting point is located as the axis of rotation, and the surface of the rotating body formed by the outwardly convex curve is an outwardly convex conical surface. The flow stabilizing section 32 is a rotating structure formed by rotating a curve that gradually bulges outward in a downward inclined direction, with the vertical line where the starting point is located as the axis of rotation, and the surface of the rotating body formed by the outwardly convex curve is an outwardly convex conical surface. The starting points of the two outwardly convex curves are located on the same vertical line, and the endpoints of the two outwardly convex curves meet, meaning that the flow divider 3 is a shuttle-shaped structure overall.

[0040] In this embodiment, the internally fed air separator utilizes a shuttle-shaped flow divider 3 at the bottom of the housing 1. When airflow enters from the bottom of the housing 1 and passes through the flow divider 3, the airflow is blocked by the convex conical surface of the flow divider 31. Furthermore, the cross-section of the flow divider 31 gradually increases along the airflow direction, guiding the airflow to diffuse to both sides of the flow divider 3. This allows the airflow to flow smoothly along the surface of the flow divider 3, reducing impact and separation when entering the flow divider 3 area and preventing the formation of vortices in the airflow inlet area at the bottom of the housing 1, thereby improving air separation accuracy. After the airflow passes through the flow divider 31, the cross-section of the flow stabilizing section 32 gradually decreases along the airflow direction. The flow stabilizing section 32 guides the airflow on both sides of the flow divider 3 to merge stably, allowing the airflow to quickly return to a uniform flow state after passing through the flow divider 3. This reduces vortices and drag forces generated by the airflow in the flow stabilizing section 32, improving the smoothness and stability of the airflow and further preventing the formation of vortices in the airflow inlet area at the bottom of the housing 1. Meanwhile, since the diversion shuttle 3 has a shuttle-shaped structure, the falling material will not accumulate when passing through the diversion shuttle 3, which can improve the efficiency of operation.

[0041] Optionally, such as Figure 1As shown, in this embodiment, the housing 1 includes an upper housing 11 and an air supply funnel 12. The large opening end of the air supply funnel 12 can be connected to the bottom of the upper housing 11, and the small opening end of the air supply funnel 12 is connected to the outside. The diversion shuttle 3 is disposed inside the air supply funnel 12.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, the cross-sectional shape of the shell 1 is roughly fish-shaped, comprising an upper ellipsoidal shell and a lower hemispherical shell. One end of the ellipsoidal shell connects to the top of the hemispherical shell, forming a narrow waist 113 at the junction. A first air-separating chamber 114 is formed above the narrow waist 113, and a second air-separating chamber 115 is formed below the narrow waist 113. By designing the shell 1 with a streamlined structure, the breakage of the stems when they come into contact with the shell 1 can be reduced. The large opening end of the make-up air funnel 12 is detachably connected to the bottom of the shell 1. When the exhaust device at the top of the shell 1 is opened, airflow flows from bottom to top within the shell 1. The airflow passes through the small opening end of the make-up air funnel 12, passes through the diverter 3, and enters the interior of the shell 1, where it performs air separation on the material in the second air-separating chamber 115.

[0043] By designing the housing 1 to include an upper housing 11 and an air supply funnel 12, with the air supply funnel 12 being detachably connected to the bottom of the housing 1, and the diversion shuttle 3 being placed inside the air supply funnel 12, it is easier to disassemble and replace the diversion shuttle 3.

[0044] It is understood that in some other embodiments, the housing 1 may also be a one-piece structure, for example, the housing 1 may be a gourd-shaped structure. In this case, a through hole communicating with the outside needs to be opened at the bottom of the housing 1, and the diverter shuttle 3 is still set in the air inlet area at the bottom of the housing 1.

[0045] Optionally, in this embodiment, the upper housing 11 is a structural component made of a transparent material, such as transparent nylon or PC. By using a transparent upper housing 11, it is convenient to observe the separation status of the stems, the air separation effect, and the discharge of impurities in real time during the air separation process, which helps to adjust the equipment parameters in a timely manner to optimize the separation efficiency.

[0046] Furthermore, such as Figure 1 and Figure 5 As shown, the axis of the diverter 3 is collinear with the axis of the make-up air funnel 12. With this arrangement, when the airflow through the small opening of the make-up air funnel 12 passes through the diverter 3, it can diffuse evenly to both sides of the diverter 3, minimizing the impact and separation of the airflow when entering the diverter 3 area, and avoiding the formation of vortices in the airflow in the air intake area at the bottom of the housing 1, thereby improving the air selection accuracy.

[0047] Furthermore, the air supply funnel 12 is sealed to the upper housing 11. Specifically, as shown... Figure 7As shown, a sealing element 5 is provided between the large opening end of the air supply funnel 12 and the upper housing 11. This arrangement improves the sealing performance between the air supply funnel 12 and the upper housing 11, thereby preventing air leakage between the air supply funnel 12 and the upper housing 11, which would affect the air separation effect. Optionally, in this embodiment, the sealing element 5 is a sealing ring.

[0048] like Figure 1 and Figure 5 As shown, a connecting component 4 is provided between the flow divider 3 and the air supply funnel 12. The connecting component 4 is used to fix the flow divider 3. By setting the connecting component 4, the flow divider 3 is kept fixed in the position of the air supply funnel 12, thereby enabling the flow divider 3 to stably divide the airflow and further preventing the airflow from forming vortices in the air intake area at the bottom of the housing 1.

[0049] Optionally, such as Figure 5 As shown, the connecting assembly 4 includes a clamp 41, a connecting support 42, and a connector 43. The clamp 41 is mounted on the diversion shuttle 3, and the connecting support 42 is mounted on the inner wall of the air supply funnel 12. The clamp 41 and the connecting support 42 are fixedly connected by the connector 43. Specifically, the connector 43 is a long strip structure, with one end fixedly connected to the clamp 41 and the other end fixedly connected to the connecting support 42 by bolts. This connecting assembly 4 has a simple structure, reliable connection, and facilitates the assembly and disassembly of the diversion shuttle 3.

[0050] It is understood that in some other embodiments, the diversion shuttle 3 may also be fixed in the air supply funnel 12 using other connecting components 4, such as two clamping members in the air supply funnel 12, which clamp and fix the diversion shuttle 3.

[0051] Further optional, such as Figure 5 As shown, in this embodiment, three connecting supports 42 and three connecting pieces 43 are provided. The three connecting supports 42 are evenly distributed along the circumference of the diverting shuttle 3, and the connecting pieces 43 are connected to the connecting supports 42 one by one. This arrangement can ensure that the position of the diverting shuttle 3 is more stable, preventing the internally fed air separator from being impacted by external forces or by strong airflow, thus preventing the position of the diverting shuttle 3 from moving and affecting the air separation effect.

[0052] Specifically, such as Figure 5 and Figure 6As shown, in this embodiment, the clamp 41 includes three clamp plates 411. The clamp plates 411 are generally arc-shaped sheet structures, and the two ends of the clamp plates 411 are bent outwards to form two mating ears 4111. The three clamp plates 411 are arranged in a circle, and any two adjacent clamp plates 411 are fixedly connected to each other by fastening bolts 412. Along the circumference of the diversion shuttle 3, three connecting supports 42 are evenly arranged on the inner side wall of the air supply funnel 12, and the positions of the three connecting supports 42 correspond to the three mating points of the clamp 41. Each connecting support 42 is fixedly connected to the mating point by a connector 43.

[0053] It is understood that in some other embodiments, the number of connecting supports 42 and connectors 43 can also be set according to actual needs, and is not limited here. It is also understood that when the number of connecting supports 42 and connectors 43 changes, the shape and number of clamps 411 can also be adapted accordingly. For example, when two connecting supports 42 are provided, the clamp 41 can include two semi-circular clamps 411; when four connecting supports 42 are provided, the clamp 41 can include four quarter-circle clamps 411, and is not limited here.

[0054] Furthermore, such as Figure 1 , Figure 3 and Figure 4 As shown, the flow divider 3 also includes a connecting part 33, which is located between the flow divider 31 and the flow stabilizer 32, and a clamp 41 is disposed on the connecting part 33. By providing the connecting part 33, it is easier to fix the clamp 41 to the flow divider 3.

[0055] Optionally, such as Figure 3 As shown, in this embodiment, the cross-section of the connecting part 33 is a streamlined curved surface. The connecting part 33 is smoothly connected to the flow splitting part 31, and the connecting part 33 is smoothly connected to the flow stabilizing part 32. The streamlined curved surface can minimize airflow resistance and optimize airflow distribution while ensuring the structural strength of the flow splitting shuttle 3.

[0056] It is understood that in some other embodiments, the connecting part 33 may also be a cylindrical structure. In this case, the cross-section of the connecting part 33 is a square surface. The cylindrical connecting part 33 is more convenient for fixing the clamp 41 to the diverter shuttle 3, and this is not a limitation.

[0057] Furthermore, in this embodiment, the cross-sectional shapes of the flow splitter 31, the flow stabilizing section 32, and the connecting section 33 are all obtained through CFD simulation. Based on the CFD results, the cross-sectional parameters of the flow splitter 3 are iteratively optimized. First, the cross-sectional shape needs to be transformed into a flexibly adjustable parametric model, allowing key features such as the leading-edge radius and the tail transition curve to be precisely controlled through specific values. Next, flow field data under different parameter combinations are generated using CFD simulation. By analyzing pressure contour maps, velocity streamlines, and drag distribution, bottlenecks affecting the flow guiding efficiency in the current design are identified—for example, if a significant high-pressure impact zone appears at the leading edge, it is often because the radius of the arc is too small, causing the airflow to suddenly change direction. In this case, the radius needs to be increased to make the airflow transition smoother. If a continuous vortex zone exists at the tail, it indicates that the transition curve is not smooth enough; the curve curvature needs to be refined to allow the airflow to exit smoothly and reduce energy loss. While adjusting the parameters, structural mechanics analysis must also be combined to avoid excessively reducing the thickness of key parts in pursuit of streamlined shape, preventing deformation or vibration under high-speed airflow impact. Each time parameters are modified, a new CFD simulation must be performed to verify the changes and observe whether the flow field evolves in a more optimal direction, such as whether the drag coefficient decreases or the pressure loss is reduced. Simultaneously, it is checked whether the structural stress remains within a safe range. This process requires repeated iterations, constantly balancing the requirements of flow guidance performance and structural stability, until an optimal cross-sectional shape is found that allows for efficient airflow, minimizes disturbance and energy loss, and ensures stable and reliable operation in the working environment. This entire process overcomes the blindness of traditional trial-and-error methods, achieving precise optimization through quantitative feedback from numerical simulation.

[0058] By optimizing the cross-sectional shape of the flow splitter 31, the flow stabilizing section 32, and the connecting section 33 through CFD (Computational Fluid Dynamics) simulation, the airflow resistance can be reduced to the greatest extent and the airflow distribution can be optimized while ensuring the structural strength of the flow splitter 3.

[0059] like Figure 1 and Figure 2 As shown, the internally fed air separator also includes a feed pipe 2, which includes an inlet end 21 and an outlet end 22. The inlet end 21 can be connected to an external feeding device, and the outlet end 22 is located in the middle of the first air separation chamber 114 to supply material into the housing 1. Specifically, the housing 1 also has an installation port 112, which is located near the air separation outlet 111 and below it. The feed pipe 2 can pass through the installation port 112 and be installed on the housing 1. The feed pipe 2 is used for feeding material, thereby enabling the material to enter. The material to be air-separated enters from the inlet end 21, which is also connected to an external blower, so that the material in the feed pipe 2 can be blown out from the outlet end 22 and enter the housing 1 for air separation.

[0060] Furthermore, such as Figure 1As shown, the cross-sectional area of ​​the feed pipe 2 gradually decreases from the feed end 21 to the discharge end 22, specifically because the change in the movement speed of the wire gradually decreases. This design avoids the wind speed and volume inside the feed pipe 2 affecting the air separation inside the housing 1, thereby improving the air separation effect and reliability of the internally fed air separator. Simultaneously, the bent pipe shape facilitates the feed pipe 2 passing through the mounting port 112. After the feed pipe 2 is installed on the housing 1, while ensuring that the discharge end 22 of the feed pipe 2 is vertically downward, the feed end 21 of the feed pipe 2 is inclined upward, thus facilitating feeding and discharging.

[0061] like Figure 1 As shown, the internally fed air separator also includes a frame 6, with the upper housing 11 and the make-up air funnel 12 both mounted on the frame 6. The frame 6 supports the upper housing 11 and the make-up air funnel 12, which improves the stability of the air separation process. Furthermore, it facilitates the handling of the internally fed air separator by operators when it needs to be moved.

[0062] The internally fed air separator provided in this embodiment has the following working process:

[0063] The exhaust device creates an airflow from bottom to top within the housing 1 through the air separation outlet 111. Material is blown into the housing 1 through the feed pipe 2. The material entering the housing 1 first enters the first air separation chamber 114. After the first air separation, qualified stems are separated from the material and discharged from the air separation outlet 111 to the next stage. The remaining material enters the second air separation chamber 115 for a second air separation. After the second air separation, qualified stems return to the first air separation chamber 114 and are discharged from the air separation outlet 111 to the next stage. Finally, the remaining material, such as stem pieces, stem clumps, and wet stem clumps, is discharged through the make-up air funnel 12 for further processing, completing the air separation of the stems.

[0064] The internally fed air separator provided in this embodiment uses a diversion shuttle 3 located in the air inlet area at the bottom of the housing 1. Airflow entering from the bottom of the housing 1 first passes through the diversion shuttle 3, where it is guided by the diversion section 31 to diffuse to both sides. This allows the airflow to flow smoothly along the surface of the diversion shuttle 3, reducing impact and separation when entering the diversion shuttle 3 area and preventing the formation of vortices in the air inlet area at the bottom of the housing 1, thereby improving air separation accuracy. After the airflow passes through the diversion section 31, the flow stabilizing section 32 guides the airflow on both sides of the diversion shuttle 3 to merge stably, allowing the airflow to quickly return to a uniform flow state after passing through the diversion shuttle 3. This reduces vortices and dragging forces generated by the flow stabilizing section 32, improving the smoothness and stability of the airflow and further preventing the formation of vortices in the air inlet area at the bottom of the housing 1. Simultaneously, because the diversion shuttle 3 has an overall shuttle-shaped structure, falling material does not accumulate when passing through it, thus improving operational efficiency. Furthermore, tests showed that when using the internally fed air separator in this embodiment for stem separation, the stem breakage rate was reduced by 77.22%.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An internally fed air separator for air separating stems, characterized in that, include: The housing (1) has an air extraction device connected to its top and the bottom of its bottom connected to the outside, so that an airflow from bottom to top flows through the housing (1). The flow divider (3) is located in the air inlet area at the bottom of the housing (1). The flow divider (3) is a shuttle-shaped structure. The end of the flow divider (3) near the bottom of the housing (1) is a flow divider (31). The flow divider (31) is a rotating body with an outward convex curve of the generatrix. Along the flow direction of the airflow, the cross section of the flow divider (31) gradually increases. The flow divider (31) is used to guide the airflow entering the housing (1) to flow along both sides of the flow divider (3). The end of the flow divider (3) away from the bottom of the housing (1) is a flow stabilizer (32). The flow stabilizer (32) is a rotating body with an outward convex curve of the generatrix. Along the flow direction of the airflow, the cross section of the flow stabilizer (32) gradually decreases. The flow stabilizer (32) is used to guide the airflow on both sides of the flow divider (3) to merge stably. The flow divider (31) and the flow stabilizer (32) are smoothly connected.

2. The internally fed air separator according to claim 1, characterized in that, The housing (1) includes an upper housing (11) and an air supply funnel (12). The large opening end of the air supply funnel (12) can be connected to the bottom of the upper housing (11), and the small opening end of the air supply funnel (12) is connected to the outside. The diversion shuttle (3) is disposed inside the air supply funnel (12).

3. The internally fed air separator according to claim 2, characterized in that, The axis of the diversion shuttle (3) is collinear with the axis of the air supply funnel (12).

4. The internally fed air separator according to claim 2, characterized in that, The air supply funnel (12) is sealed to the upper shell (11).

5. The internally fed air separator according to claim 2, characterized in that, A connecting component (4) is provided between the diversion shuttle (3) and the air supply funnel (12), and the connecting component (4) is used to fix the diversion shuttle (3).

6. The internally fed air separator according to claim 5, characterized in that, The connecting assembly (4) includes a clamp (41), a connecting support (42), and a connector (43). The clamp (41) is disposed on the diversion shuttle (3), and the connecting support (42) is disposed on the inner side wall of the air supply funnel (12). The clamp (41) and the connecting support (42) are fixedly connected by the connector (43).

7. The internally fed air separator according to claim 6, characterized in that, There are three connecting supports (42) and three connecting parts (43). The three connecting supports (42) are evenly distributed along the circumference of the diversion shuttle (3). The connecting parts (43) are connected to the connecting supports (42) one by one.

8. The internally fed air separator according to claim 6, characterized in that, The diverter shuttle (3) also includes a connecting part (33), which is located between the diverter part (31) and the stabilizing part (32), and the clamp (41) is disposed on the connecting part (33).

9. The internally fed air separator according to claim 8, characterized in that, The cross-section of the connecting part (33) is a streamlined curved surface. The connecting part (33) is smoothly connected to the diverting part (31), and the connecting part (33) is smoothly connected to the stabilizing part (32).

10. The internally fed air separator according to claim 8, characterized in that, The cross-sectional shapes of the flow splitter (31), the flow stabilizer (32), and the connecting part (33) were all obtained through CFD simulation.

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