An assembled axial flow fan impeller

Abstract

The application relates to the technical field of impellers, and provides an assembled axial flow fan impeller which comprises a wheel disc and blades, wherein a plurality of connecting seats are detachably arranged on the wheel disc and are arranged at intervals around the central axis of the wheel disc, and the number of the blades corresponds to that of the connecting seats; a plug-in connector is arranged on the blade, and a plug-in groove for embedding the plug-in connector is arranged on the connecting seat. The assembled axial flow fan impeller can improve the flexibility of disassembling and assembling the blades of the impeller.

Description

Technical Field

[0001] This application relates to the technical field of impellers, and in particular to an assembled axial flow fan impeller. Background Technology

[0002] The impeller is the core working component of an axial flow fan, typically consisting of a disc and several blades distributed circumferentially along the disc. During operation, airflow flows in and out axially along the impeller. Its function is to perform work on the gas through the rotation of the blades, converting the mechanical energy of the prime mover into the pressure energy and kinetic energy of the gas, thereby realizing the transport, pressurization, and circulation of the gas. It is widely used in ventilation, cooling, industrial dust removal, and tunnel smoke extraction.

[0003] Currently, axial flow fans are increasingly used in diverse applications, requiring numerous models and covering a wide range of performance parameters. Existing technologies often employ integrally cast or welded impellers with fixed blade installation angles, meaning each impeller typically corresponds to only a narrow performance range. When demanding flow rates, pressures, or speeds change, it is usually necessary to redesign the blade profile, develop molds, and remanufacture the impeller, resulting in long manufacturing cycles and high costs. Furthermore, the connection between the impeller disc and blades in some impellers lacks versatility, making it difficult to cover a wide range of performance parameters through rapid assembly of standardized components. Therefore, further improvements are needed. Summary of the Invention

[0004] To improve the flexibility of impeller blade assembly and disassembly, this application provides an assembled axial flow fan impeller.

[0005] The assembled axial flow fan impeller provided in this application adopts the following technical solution: An assembled axial flow fan impeller includes a disc and blades. A connecting seat is detachably installed on the disc, and multiple connecting seats are arranged at intervals around the central axis of the disc. The number of blades corresponds to the number of connecting seats. A plug is provided on the blade, and a plug groove is provided on the connecting seat for the plug to be inserted.

[0006] By adopting the above technical solution, the impeller and blades are connected as a whole through the connecting seat. In practical applications, different sizes of impellers or blades can be replaced according to the actual flow rate, pressure, or speed required by the axial flow fan, improving the flexibility of disassembly and assembly between the impeller and blades. The insertion and engagement of the blade connectors and the connecting seat slots further enhances the ease of disassembly and assembly between the blades and the connecting seat.

[0007] Optionally, two wheels are provided, and a connecting seat is provided between the two wheels; a first connecting member is provided between the two wheels, and the two wheels are detachably connected through the first connecting member.

[0008] By adopting the above technical solution, the two discs are clamped together in the connecting seat to connect all the connecting seats in series.

[0009] Optionally, the side wall of the connecting seat is provided with a positioning block, and the surface of the wheel is provided with a positioning groove for the positioning block to be embedded.

[0010] By adopting the above technical solution and utilizing the interlocking of positioning blocks and positioning slots, the installation accuracy of the connector is improved.

[0011] Optionally, the connecting seat includes two clamping blocks, which together form the insertion groove; a second connecting member is provided between the clamping blocks and the wheel, and the clamping blocks and the wheel are detachably connected through the second connecting member.

[0012] By adopting the above technical solution, the two clamping blocks are combined to form a connecting seat, so that the blade's connector can be inserted into the connector slot of the connecting seat, thereby improving the ease of assembly and disassembly between the blade and the connecting seat.

[0013] Optionally, the end face of the connector is provided with a protrusion, and the inner wall of the connector groove is provided with a groove for the protrusion to be inserted.

[0014] By adopting the above technical solution, the angle of the blade is limited by the interlocking of the protrusion and groove, reducing the possibility of the connector rotating freely in the interlocking groove.

[0015] Optionally, one end of the positioning groove penetrates the outer peripheral wall of the wheel, and the connecting seat slides into the wheel along the length of the positioning groove; a limiting component is provided on the wheel.

[0016] Optionally, the limiting component includes a limiting ring and a first spring. The limiting ring is rotatably mounted on the wheel and has a limiting hook. A limiting hook groove is provided on the side wall of the connecting seat. The first spring is disposed between the limiting ring and the wheel. In its normal state, the first spring forces the limiting hook to be embedded in the limiting hook groove.

[0017] By adopting the above technical solution, during the installation of the connector, the positioning block of the connector is slid into the positioning groove and pushed inward, so that the connector slides into the wheel from the outside to the inside along the length direction of the positioning groove. During this process, the connector pushes the limiter to rotate around its own central axis by a certain angle, forcing the first spring to deform and retain its elasticity. After the connector moves to the set position, the limit hook is aligned with the limit hook groove. At this time, under the action of the first spring, the limit ring rotates and resets, thereby allowing the limit hook to embed into the limit hook groove, achieving locking of the connector and improving the ease of installation of the connector.

[0018] Optionally, the connector includes a connecting part and an anti-rotation part. One end of the connecting part is connected to the blade, and the other end is connected to the anti-rotation part. The cross-section of the anti-rotation part is polygonal. An anti-rotation groove is provided on the inner wall of the connector slot. A second spring is provided between the connector and the connecting seat. The second spring forces the anti-rotation part to be embedded in the anti-rotation groove.

[0019] By adopting the above technical solution, when the blade angle needs to be adjusted, pressure is applied to the blade towards the impeller, forcing the anti-rotation part of the connector to disengage from the anti-rotation groove. The blade angle can then be adjusted according to actual needs. After the angle adjustment is complete, the blade is released, and under the action of the second spring, the anti-rotation part re-embeds into the anti-rotation groove, thereby locking the blade and preventing the possibility of free rotation of the blade around the central axis of the connector. Simultaneously, by using a press-to-unlock mechanism, when the impeller of the axial flow fan rotates at high speed, the blade is subjected to centrifugal force, which ensures that the anti-rotation part is firmly embedded in the anti-rotation groove, improving the overall structural stability.

[0020] Optionally, the wheel is provided with a cover, and the cover is provided with reinforcing components. The number of reinforcing components corresponds to the number of connecting seats, and the cover is connected in series with all the connecting seats through the reinforcing components.

[0021] Optionally, the reinforcing component includes a first docking post and a second docking post disposed on the cover. Multiple first docking posts and multiple second docking posts are provided, and the outer diameters of each first docking post and each second docking post are set to be different. The peripheral wall of the connector is provided with multiple first docking holes and multiple second docking holes. The inner diameter of each first docking hole is adapted to the outer diameter of the corresponding first docking post, and the inner diameter of each second docking hole is adapted to the outer diameter of the corresponding second docking post. The first docking posts and the second docking posts are arranged at intervals along the radial direction of the wheel.

[0022] By adopting the above technical solution, after installing multiple connecting seats with blades onto the wheel, the angle of all blades is adjusted according to actual needs. After all blade angles are adjusted, the cover is installed into the wheel, so that the first and second mating posts of the cover are inserted into the first and second mating holes of the connector, respectively, to further lock the connector, reduce the possibility of the connector rotating freely in the connector groove, and at the same time restrict the connecting seat from sliding along the length direction of the positioning slide, thereby improving the connection stability between the blade and the wheel.

[0023] Furthermore, by setting a first mating post and a second mating post, and setting different outer diameters for each first mating post and each second mating post, that is, different inner diameters for each first mating hole and each second mating hole, the purpose of this design is that: when the assembly personnel adjust the blade rotation angle, if an installation error occurs where the rotation angle of one blade differs from that of the other blades, the first or second mating post of the cover cannot be smoothly inserted into the first or second mating hole due to the size difference. This means that the assembly personnel are forced to adjust the rotation angle of all blades to be consistent in order to successfully install the cover, thereby improving the assembly quality of the impeller. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 This is a schematic diagram of the explosion of the roulette wheel in Example 1; Figure 3 This is an exploded view of the connector in Embodiment 1; Figure 4 This is a schematic diagram illustrating the structure of the limiting ring in Example 2; Figure 5 This is a schematic diagram illustrating the structure of the positioning groove in Embodiment 2; Figure 6 yes Figure 4 Enlarged view of point A in the middle; Figure 7 This is a partial cross-sectional view of the anti-rotation part in Embodiment 3; Figure 8 This is a schematic diagram illustrating the structure of the reinforcing component in Example 4; Figure 9 yes Figure 8 Enlarged view of point B in the middle; Figure 10 This is a partial cross-sectional view of Embodiment 4, showing the first and second mating holes.

[0025] Explanation of reference numerals in the attached drawings: 1. Wheel; 11. Positioning groove; 12. Connecting ear; 13. Mounting base; 2. Blade; 21. Plug; 211. Connecting part; 212. Anti-rotation part; 213. Limiting part; 214. First mating hole; 215. Second mating hole; 3. Connecting base; 31. Plug groove; 311. Groove; 312. Anti-rotation groove; 32. Positioning block; 33. Clamping block; 331. Through hole; 332. First guide surface; 34. Limiting hook groove; 35. Second spring; 351. Abutment piece; 4. Limiting ring; 41. Limiting hook; 411. Second guide surface; 5. Cover; 6. Reinforcing component; 61. First mating post; 62. Second mating post. Detailed Implementation

[0026] The following combination Figures 1-10 This application will be described in further detail. Example 1

[0027] This application discloses an assembled axial flow fan impeller.

[0028] Reference Figure 1 , Figure 2 , Figure 3 An assembled axial flow fan impeller includes a disc 1 and blades 2. There are two discs 1, and multiple connecting seats 3 are installed between the two discs 1. The multiple connecting seats 3 are arranged at intervals around the central axis of the disc 1. The number of blades 2 corresponds to the number of connecting seats 3. Each blade 2 is installed on a corresponding connecting seat 3. The blades 2 are installed on the disc 1 through the connecting seats 3.

[0029] For ease of description, one of the wheel discs 1 is defined as the first wheel disc 1, and the other wheel disc 1 is defined as the second wheel disc 1. In this embodiment, the connection between the first wheel disc 1 and the second wheel disc 1 is specifically as follows: a first connecting member is provided between the first wheel disc 1 and the second wheel disc 1, and the two wheel discs 1 are detachably connected through the first connecting member. The first connecting member is a first bolt (not shown in the figure). A mounting base 13 is integrally formed on the first wheel disc 1. The first bolt passes through the second wheel disc 1 and is threadedly connected to the mounting base 13 of the first wheel disc 1. Multiple first bolts are arranged at intervals around the central axis of the first wheel disc 1, and the first wheel disc 1 and the second wheel disc 1 are detachably connected through multiple first bolts.

[0030] A cover 5 is installed on the side of the second wheel 1 facing away from the first wheel 1. Specifically, the connection between the second wheel 1 and the cover 5 is as follows: multiple connecting ears 12 are fixedly installed on the surface of the second wheel 1 facing away from the first wheel 1. These connecting ears 12 are arranged at intervals around the central axis of the second wheel 1. A third bolt (not shown in the figure) is installed on the cover 5, passing through the cover 5 and threadedly connected to the connecting ears 12. The cover 5 and the second wheel 1 are detachably connected via the third bolt. In other embodiments, the cover 5 and the second wheel 1 can also be detachably connected via a snap-fit ​​connection.

[0031] In this embodiment, the connection between the connecting seat 3 and the wheel 1 is specifically as follows: a second connecting member is provided between the connecting seat 3 and the wheel 1, and the connecting seat 3 and the wheel 1 are detachably connected through the second connecting member. The second connecting member includes a second bolt and a connecting nut (not shown in the figure). The second bolt passes through the first wheel 1, the connecting seat 3, and the second wheel 1 in sequence. The connecting nut is sleeved on the second bolt and threadedly connected to the second bolt. The second bolt and the connecting nut connect the first wheel 1, the connecting seat 3, and the second wheel 1 in series to form a whole.

[0032] The specific structure of the connecting seat 3 in this embodiment is as follows: The connecting seat 3 includes two clamping blocks 33, each clamping block 33 having multiple through holes 331 for the second bolt to pass through. Positioning blocks 32 are fixedly installed on the side walls of the two clamping blocks 33 that are far apart from each other. Positioning grooves 11 for the positioning blocks 32 to be embedded are opened on the surface of the first wheel 1 and the surface of the second wheel 1.

[0033] The connection between blade 2 and connecting seat 3 is specifically as follows: A connector 21 is integrally formed on the sidewall of blade 2. In this embodiment, connector 21 includes a connecting portion 211 and a limiting portion 213. One end of the connecting portion 211 is fixedly connected to the sidewall of blade 2, and the other end is fixedly connected to the limiting portion 213. The outer diameter of the limiting portion 213 is larger than the outer diameter of the connecting portion 211. Two clamping blocks 33 of the connecting seat 3 enclose and form a insertion groove 31. The shape of the insertion groove 31 matches the shape of the connector 21, and the connector 21 is inserted into the insertion groove 31. A raised strip (not shown in the figure) is integrally formed on the end face of connector 21, and a groove 311 for the raised strip to be inserted is provided on the inner wall of the insertion groove 31.

[0034] The implementation principle of Embodiment 1 of this application is as follows: the impeller 1 and the blade 2 are connected as a whole by the connecting seat 3. In practical applications, the impeller 1 or blade 2 of different sizes can be replaced according to the actual flow rate, pressure or speed required by the axial flow fan, thereby improving the flexibility of disassembly and assembly between the impeller 1 and the blade 2 in the impeller.

[0035] Two discs 1 are used to clamp the connecting seat 3 together, so that all connecting seats 3 are connected in series. Two clamping blocks 33 are combined to form the connecting seat 3, so that the plug 21 of the blade 2 can be inserted into the plug slot 31 of the connecting seat 3, thereby improving the ease of disassembly and assembly between the blade 2 and the connecting seat 3. Example 2

[0036] This application discloses an assembled axial flow fan impeller.

[0037] The difference between the assembled axial flow fan impeller disclosed in this application and that in Embodiment 1 is: Reference Figure 4 , Figure 5 , Figure 6 In this embodiment, both ends of each positioning groove 11 extend radially along the wheel 1, and one end of the positioning groove 11 penetrates the outer peripheral wall of the first wheel 1 or the second wheel 1 so that the positioning block 32 of the connecting seat 3 can slide in, and the connecting seat 3 slides between the first wheel 1 and the second wheel 1 along the length direction of the positioning groove 11.

[0038] The wheel 1 is provided with a limiting component for limiting the connecting seat 3. The limiting component includes a limiting ring 4 and a first spring. The limiting ring 4 is rotatably mounted on the first wheel 1 and is coaxially arranged with the first wheel 1. The outer peripheral wall of the limiting ring 4 has multiple limiting hooks 41. The number of limiting hooks 41 corresponds to the number of connecting seats 3. Each connecting seat 3 has a limiting hook groove 34 on its side wall.

[0039] A first spring (not shown in the figure) is installed between the limiting ring 4 and the wheel 1. One end of the first spring is fixed to the wheel 1, and the other end is fixed to the limiting ring 4. Under normal conditions, the first spring forces the limiting hook 41 to be embedded in the limiting hook groove 34 of the corresponding connecting seat 3. The connecting seat 3 has a first guide surface 332 that pushes the limiting hook 41, and the limiting hook 41 has a second guide surface 411 that abuts against the first guide surface 332.

[0040] The implementation principle of Embodiment 2 of this application is as follows: During impeller assembly, the first impeller disk 1 and the second impeller disk 1 are first assembled into one piece, and then the connecting seat 3 with blades 2 is slid into the space between the first impeller disk 1 and the second impeller disk 1 one by one along the length direction of the positioning groove 11. During the sliding process of the connecting seat 3, the connecting seat 3, through the cooperation of the first guide surface 332 and the second guide surface 411, pushes the limiting ring 4 to rotate around its own central axis by a certain angle, forcing the reset torsion spring to deform and retain elasticity.

[0041] As the connecting seat 3 moves, when the limiting hook 41 is aligned with the limiting hook groove 34, the limiting ring 4 rotates and resets under the action of the return torsion spring, thereby embedding the limiting hook 41 into the limiting hook groove 34 and achieving initial locking of the connecting seat 3. For disassembly, simply use a tool to reverse the movement of the limiting ring 4 to unlock all connecting seats 3, improving the ease of assembly and disassembly of the connecting seats 3. Example 3

[0042] This application discloses an assembled axial flow fan impeller.

[0043] The difference between the assembled axial flow fan impeller disclosed in this application and that of Embodiment 1 or Embodiment 2 is as follows: Reference Figure 7 In this embodiment, the connector 21 includes a connecting portion 211 and an anti-rotation portion 212. One end of the connecting portion 211 is fixedly connected to the blade 2, and the other end is fixedly connected to the anti-rotation portion 212. The anti-rotation portion 212 has a polygonal cross-section. An anti-rotation groove 312 is formed on the inner wall of the connector groove 31, and the shape of the anti-rotation groove 312 is adapted to the shape of the anti-rotation portion 212. A second spring 35 is installed in the connector groove 31. One end of the second spring 35 abuts against the inner wall of the connector groove 31, and the other end is fixedly connected to an abutment piece 351. Under normal conditions, the second spring 35 forces the abutment piece 351 to abut against the anti-rotation portion 212 and forces the anti-rotation portion 212 to be embedded in the anti-rotation groove 312.

[0044] The implementation principle of Embodiment 3 of this application is as follows: When it is necessary to adjust the angle of the blade 2, pressure is applied to the blade 2 toward the wheel 1, forcing the anti-rotation part 212 of the connector 21 to disengage from the anti-rotation groove 312. Then, the angle of the blade 2 can be adjusted according to actual needs. After the angle adjustment is completed, the blade 2 is released. Under the action of the second spring 35, the anti-rotation part 212 re-embeds into the anti-rotation groove 312, thereby locking the blade 2 and preventing the possibility of the blade 2 rotating freely around the central axis of the connector 21.

[0045] The blade 2 utilizes a press-to-unlock mechanism. On one hand, when the impeller of the axial flow fan rotates at high speed, the blade 2, under the action of centrifugal force, ensures that the anti-rotation part 212 is firmly embedded in the anti-rotation groove 312, improving the overall structural connection stability. On the other hand, when adjusting the angle of the blade 2, the angle can be adjusted directly by pressing the blade 2, without the need to disassemble the first and second discs, thus improving overall operational efficiency. Example 4

[0046] This application discloses an assembled axial flow fan impeller.

[0047] The difference between the assembled axial flow fan impeller disclosed in this application and that in embodiment 3 is: Reference Figure 8 , Figure 9 , Figure 10 In this embodiment, a reinforcing component 6 is provided on the cover 5. Multiple reinforcing components 6 are arranged at intervals around the central axis of the second wheel 1. The number of reinforcing components 6 corresponds to the number of connecting seats 3. All connecting seats 3 are connected in series through the reinforcing components 6.

[0048] Each reinforcing component 6 includes multiple first docking posts 61 and multiple second docking posts 62. One end of all the first docking posts 61 and all the second docking posts 62 are fixedly installed on the inner wall of the cover 5, and the other end of all the first docking posts 61 and all the second docking posts 62 passes through the second wheel 1.

[0049] In the reinforcing component 6, multiple first docking posts 61 are arranged at intervals around the central axis of the second wheel 1, and multiple second docking posts 62 are also arranged at intervals around the central axis of the second wheel 1. The first docking posts 61 and the second docking posts 62 are arranged at intervals along the radial direction of the wheel 1.

[0050] In the reinforcing component 6, the outer diameters of each first mating post 61 and each second mating post 62 are set to be different. The peripheral wall of the connector 21 is provided with a plurality of first mating holes 214 and a plurality of second mating holes 215. The inner diameter of each first mating hole 214 is adapted to the outer diameter of the corresponding first mating post 61, and the inner diameter of each second mating hole 215 is adapted to the outer diameter of the corresponding second mating post 62.

[0051] In the connecting seat 3, the surface of the clamping block 33 near the second wheel 1 is provided with clearance holes (not shown in the figure) for the first docking post 61 and the second docking post 62 to pass through. When the cover 5 is installed into the second wheel 1, one end of the first docking post 61 passes through the clamping block 33 of the connecting seat 3 in sequence and is inserted into the first docking hole 214 of the connector 21; one end of the second docking post 62 passes through the clamping block 33 of the connecting seat 3 in sequence and is inserted into the second docking hole 215 of the connector 21.

[0052] The implementation principle of Embodiment 4 of this application is as follows: After installing multiple connecting seats 3 with blades 2 between the first wheel 1 and the second wheel 1, the angles of all blades 2 are adjusted according to actual needs. After the angles of all blades 2 are adjusted, the cover 5 is installed into the second wheel 1, so that the first docking post 61 and the second docking post 62 of the cover 5 are respectively inserted into the first docking hole 214 and the second docking hole 215 of the plug 21, forming a further locking of the plug 21, reducing the possibility of the plug 21 rotating freely in the plug groove 31, and at the same time restricting the connecting seat 3 from sliding along the length direction of the positioning slide, thereby improving the connection stability between the blades 2 and the wheel 1.

[0053] Furthermore, by setting a first docking post 61 and a second docking post 62, and setting the outer diameter of each first docking post 61 and each second docking post 62 to be different, that is, the inner diameter of each first docking hole 214 and each second docking hole 215 is different. This design is because: after the assembly personnel adjust the rotation angle of the blade 2, if due to operational errors, the rotation angle of one blade 2 is different from that of other blades 2, then the first docking post 61 or the second docking post 62 of the cover 5 cannot be smoothly inserted into the first docking hole 214 or the second docking hole 215 due to the size difference. This means that the cover 5 cannot be installed smoothly, reminding and forcing the assembly personnel to adjust the rotation angle of all blades 2 to be consistent in order to successfully install the cover 5 into the second impeller 1, thereby improving the assembly quality of the impeller.

[0054] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An assembled axial flow fan impeller, characterized in that: It includes a wheel (1) and blades (2). A connecting seat (3) is detachably installed on the wheel (1). Multiple connecting seats (3) are arranged at intervals around the central axis of the wheel (1). The number of blades (2) corresponds to the number of connecting seats (3). A plug (21) is provided on the blade (2). A plug groove (31) for the plug (21) to be inserted is provided on the connecting seat (3).

2. The assembled axial flow fan impeller according to claim 1, characterized in that: Two wheels (1) are provided, and a connecting seat (3) is provided between the two wheels (1); a first connecting member is provided between the two wheels (1), and the two wheels (1) are detachably connected through the first connecting member.

3. The assembled axial flow fan impeller according to claim 1, characterized in that: The side wall of the connecting seat (3) is provided with a positioning block (32), and the surface of the wheel (1) is provided with a positioning groove (11) for the positioning block (32) to be embedded.

4. The assembled axial flow fan impeller according to claim 1, characterized in that: The connecting seat (3) includes two clamping blocks (33), which together form the insertion groove (31); a second connecting member is provided between the clamping block (33) and the wheel (1), and the clamping block (33) and the wheel (1) are detachably connected through the second connecting member.

5. The assembled axial flow fan impeller according to claim 1, characterized in that: The end face of the connector (21) is provided with a protrusion, and the inner wall of the connector groove (31) is provided with a groove (311) for the protrusion to be inserted.

6. The assembled axial flow fan impeller according to claim 3, characterized in that: One end of the positioning groove (11) penetrates the outer peripheral wall of the wheel (1), and the connecting seat (3) slides into the wheel (1) along the length direction of the positioning groove (11); the wheel (1) is provided with a limiting component.

7. The assembled axial flow fan impeller according to claim 6, characterized in that: The limiting component includes a limiting ring (4) and a first spring. The limiting ring (4) is rotatably mounted on the wheel (1). The limiting ring (4) has a limiting hook (41). The side wall of the connecting seat (3) is provided with a limiting hook groove (34). The first spring is located between the limiting ring (4) and the wheel (1). The first spring normally forces the limiting hook (41) to be embedded in the limiting hook groove (34).

8. The assembled axial flow fan impeller according to claim 1, characterized in that: The connector (21) includes a connecting part (211) and an anti-rotation part (212). One end of the connecting part (211) is connected to the blade (2), and the other end is connected to the anti-rotation part (212). The cross-section of the anti-rotation part (212) is polygonal. The inner wall of the plug groove (31) is provided with an anti-rotation groove (312). A second spring (35) is provided between the connector (21) and the connecting seat (3). The second spring (35) forces the anti-rotation part (212) to be embedded in the anti-rotation groove (312).

9. The assembled axial flow fan impeller according to claim 1, characterized in that: The wheel (1) is provided with a cover (5), and the cover (5) is provided with a reinforcing component (6). The number of reinforcing components (6) corresponds to the number of connecting seats (3). The cover (5) is connected in series with all the connecting seats (3) through the reinforcing components (6).

10. An assembled axial flow fan impeller according to claim 9, characterized in that: The reinforcing component (6) includes a first docking post (61) and a second docking post (62) disposed on the cover (5). There are multiple first docking posts (61) and multiple second docking posts (62), and the outer diameter of each first docking post (61) and the outer diameter of each second docking post (62) are set to be different. The peripheral wall of the plug (21) is provided with multiple first docking holes (214) and multiple second docking holes (215). The inner diameter of each first docking hole (214) is adapted to the outer diameter of the corresponding first docking post (61), and the inner diameter of each second docking hole (215) is adapted to the outer diameter of the corresponding second docking post (62). The first docking posts (61) and the second docking posts (62) are arranged at intervals along the radial direction of the wheel (1).

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