Axial flow fan blade and axial flow fan

Abstract

The utility model relates to the technical field of air conditioners, and discloses an axial flow fan blade and an axial flow fan, the axial flow fan blade comprises a hub, a locking piece and a plurality of blades, an inner cavity with one end provided with an opening is defined by the hub in the axial direction, an end cover is arranged at the end, opposite to the opening, of the hub, a hollow guide column is arranged in the inner cavity, and at least part of the guide column penetrates through the end cover; the multiple blades are distributed on the periphery of the hub at intervals in the circumferential direction. The locking piece comprises a locking cover and a hollow extension column, the extension column is arranged on the surface, facing the end cover, of the locking cover, and a locking part is arranged in the extension column; when the locking cover is connected to the end cover, the extension column and the end, extending out of the end cover, of the guide column are connected in a sleeved mode and communicated with each other, so that the connecting column extends into the extension column and is locked by the locking part. The axial flow fan blade is simple in structure and convenient to disassemble and assemble, subsequent packaging and transportation are facilitated, and meanwhile damaged fan blades can be replaced more conveniently.

Description

Technical Field

[0001] This utility model relates to the field of slitting machine technology, and in particular to an axial flow fan blade and an axial flow fan. Background Technology

[0002] Axial flow fans are widely used gas conveying equipment in industries such as industry, agriculture, construction, ventilation, and air conditioning. Their core component is the axial flow fan blade, whose design directly affects the fan's efficiency, noise level, energy consumption, and other performance indicators. With the continuous advancement of industrial technology, the performance requirements for axial flow fans are becoming increasingly stringent, especially in terms of high efficiency, energy saving, low noise, and lightweight design. However, existing axial flow fan blades cannot be quickly installed and disassembled, are inconvenient for packaging and transportation, and make it difficult to replace damaged blades.

[0003] In addition, the airflow generated by axial flow fan blades is unstable and prone to radial diffusion. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides an axial flow fan blade and an axial flow fan.

[0005] In a first aspect, this application provides an axial flow fan blade, comprising:

[0006] A hub, which forms an inner cavity with an opening at one end along the axial direction, has an end cap at one end of the hub opposite to the opening, and the inner cavity has a hollow guide post, which at least partially penetrates the end cap.

[0007] Multiple blades are circumferentially spaced around the outer periphery of the hub;

[0008] A locking component includes a locking cover and a hollow extension post. The extension post is disposed on the surface of the locking cover facing the end cover, and a locking part is provided inside the extension post. When the locking cover is connected to the end cover, the extension post and the guide post are sleeved and communicate with each other at one end extending out of the end cover, so that the connecting post extends into the interior of the extension post and is locked by the locking part.

[0009] In one possible implementation, the end cap has a plurality of slots distributed circumferentially on the end face away from the opening, and the locking cap has a plurality of locking strips on the surface facing the end cap that are adapted to the slots.

[0010] In one possible implementation, the card slot has symmetrical arc-shaped grooves on both sides that connect to the card slot, and a fixed space is formed between the two arc-shaped grooves. The card strip has a fixing point that matches the fixed space.

[0011] In one possible implementation, the end cap has a recessed portion formed on the end face opposite to the opening, the portion of the guide post extending out of the end cap is located in the middle of the recessed portion, and the slot extends from the outer edge of the recessed portion to the outer edge of the end cap.

[0012] In one possible implementation, the system further includes a plurality of reinforcing strips located in the inner cavity, all of which are distributed circumferentially around the guide post, with one end of each reinforcing strip connected to the guide post and the other end connected to the inner wall of the hub.

[0013] In one possible implementation, the hub has an air vent communicating with the inner cavity, the air vent being located between adjacent blades and at least partially covered by the blades.

[0014] In one possible implementation, a reinforcing block is further included, the reinforcing block being located at the outer edge where the blade connects to the hub, and the reinforcing strip being fixed to the hub and the blade.

[0015] In one possible implementation, the blade is provided with three blades, namely a first blade, a second blade and a third blade, wherein the end of the first blade near the hub is connected to the lower part of the hub, the end of the second blade near the hub is connected to the middle part of the hub, and the end of the third blade near the hub is connected to the upper part of the hub.

[0016] In one possible implementation, the first blade, the second blade, and the third blade each have a leading edge, an outer edge, and a trailing edge connected in sequence. The leading edge bends from one end near the hub to the other end to form an arc shape. The trailing edge includes a first arc segment and a second arc segment. The first arc segment is the segment near the hub and is formed by an outward convexity, while the second arc segment is formed by an inward concavity.

[0017] Secondly, this application also provides an axial flow fan, including the axial flow fan blades described above.

[0018] The technical solutions provided in this application have the following advantages compared with the prior art:

[0019] Multiple blades are axially distributed around the outer circumference of the hub, and an end cap is provided at the end of the hub opposite the opening. A locking cap is connected to the end cap. At this time, the extension column and the guide column extend out of the end cap and are sleeved together. When the axial flow fan needs to be installed, the connecting column extends from the opening into the inner cavity and passes through the guide column and the extension column in sequence. Then it rotates to the connecting column so that the locking part inside the extension column locks the connecting column, thereby ensuring the connection between the entire axial flow fan and the connecting column and preventing slippage during the rotation of the axial flow fan, which would affect the airflow generated by the axial flow fan. When the axial flow fan needs to be disassembled, simply rotate the connecting shaft in the opposite direction to disengage the locking part from the connecting column, and then pull the connecting column outward to complete the disassembly of the axial flow fan. The structure is simple, easy to assemble and disassemble, and facilitates subsequent packaging and transportation. It also makes it easier to replace damaged fan blades. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an axial flow fan blade according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a locking component in an axial flow fan blade according to an embodiment of the present invention;

[0022] Figure 3 This is a structural schematic diagram of an axial flow fan blade from another perspective according to an embodiment of this utility model;

[0023] Figure 4 This is a structural schematic diagram of an axial flow fan blade from another perspective of this utility model.

[0024] Icon labels:

[0025] 10. Hub; 10a. Inner cavity; 10b. Air vent; 20. End cap; 20a. Slot; 20b. Arc groove; 20c. Recess; 30. Guide post; 40. Blade; 41. Leading edge; 42. Outer edge; 43. Trailing edge; 431. Second arc segment; 432. First arc segment; 50. Locking element; 51. Locking cover; 52. Extension post; 53. Locking strip; 54. Fixing point; 60. Reinforcing block; 70. Reinforcing strip. Detailed Implementation

[0026] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0027] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" 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. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0029] like Figure 1 and Figure 4As shown in the figure, one embodiment of this utility model provides an axial flow fan blade, which includes a hub 10, a locking member 50, and a plurality of blades 40. The hub 10 forms an inner cavity 10a with an opening at one end along the axial direction. An end cap 20 is provided at the end of the hub 10 opposite to the opening. A hollow guide post 30 is provided in the inner cavity 10a, and the guide post 30 at least partially penetrates the end cap 20. The plurality of blades 40 are distributed circumferentially at intervals on the outer periphery of the hub 10. The locking member 50 includes a locking cover 51 and a hollow extension post 52. The extension post 52 is provided on the surface of the locking cover 51 facing the end cap 20, and a locking part is provided inside the extension post 52. Wherein, when the locking cover 51 is connected to the end cap 20, the extension post 52 and the guide post 30 are sleeved and connected to each other at the end of the end cap 20, so that the connecting post extends into the interior of the extension post 52 and is locked by the locking part.

[0030] In this embodiment, the axial flow fan has multiple blades 40 distributed axially around the outer periphery of the hub 10. An end cap 20 is provided at one end of the hub 10 opposite to the opening, and a locking cap 51 is connected to the end cap 20. At this time, the extension column 52 and the guide column 30 extend out of the end cap 20 and are sleeved together. When the axial flow fan blade needs to be installed, the connecting column extends from the opening into the inner cavity 10a, and passes through the guide column 30 and the extension column 52 in sequence, and then rotates to the connecting column so that the locking part inside the extension column 52 locks the connecting column, thereby ensuring the connection between the entire axial flow fan blade and the connecting column and preventing slippage during the rotation of the axial flow fan blade, which would affect the airflow generated by the axial flow fan blade. When the axial flow fan blade needs to be disassembled, simply rotate the connecting shaft in the opposite direction so that the locking part disengages from the locking of the connecting column, and then pull the connecting column outward to complete the disassembly of the axial flow fan blade. The structure is simple, the disassembly and assembly are convenient, and it is beneficial for subsequent packaging and transportation. It is also more convenient to replace damaged fan blades.

[0031] For example, the locking part can be internally threaded, and correspondingly, the portion of the connecting column extending into the extension column 52 is provided with external threads, so that when the axial flow fan blade is installed, it can be fixed by rotating the connecting column using a threaded connection. The above is only an example, but is not limited thereto.

[0032] For example, the guide post 30 is provided to guide the connecting post into the extension quickly and accurately. Additionally, the guide post 30 and the end cap 20 can be integrally molded to ensure sufficient structural strength and prevent breakage during use.

[0033] In addition, the locking cover 51 can be connected to the end cover 20 in a detachable manner, such as by snap-fit ​​or fastening, or it can be a one-piece molded non-detachable manner.

[0034] In one possible implementation, the end cap 20 has multiple slots 20a distributed circumferentially on its end face away from the opening, and the locking cover 51 has multiple locking strips 53 on its surface facing the end cap 20 that are adapted to the slots 20a. That is, when connecting the locking cover 51 to the end cap 20, the locking strips 53 of the locking cover 51 are aligned with the slots 20a on the end cap 20, and then the locking cover 51 is pushed towards the end cap 20, so that the locking strips 53 are engaged in the slots 20a, thereby realizing the detachable connection of the locking cover 51 to the end cap 20. The structure is simple and easy to assemble and disassemble.

[0035] In one possible implementation, symmetrical arc-shaped grooves 20b are provided on both sides of the slot 20a, connecting the slot 20a. A fixed space is formed between the two arc-shaped grooves 20b, and the locking strip 53 is provided with a fixing point 54 that matches the fixed space. In this way, the fixing point 54 can be used to engage with the fixed space, thereby further strengthening the connection between the locking cover 51 and the end cover 20 and preventing it from falling off during use.

[0036] In one possible implementation, the end cap 20 has a recessed position 20c formed in the inward face away from the opening. The portion of the guide post 30 extending out of the end cap 20 is located in the middle of the recessed position 20c, and the groove 20a extends from the outer edge of the recessed position 20c to the outer edge of the end cap 20. In this way, the recessed position 20c can provide a precise axial positioning reference for the protruding end of the guide post 30, avoiding radial displacement of the guide post 30 due to vibration or assembly errors, which would affect the docking of the guide post 30 and the extension post 52.

[0037] In one possible implementation, a plurality of reinforcing strips 70 located in the inner cavity 10a are also included. All reinforcing strips 70 are distributed circumferentially around the periphery of the guide post 30, with one end of each reinforcing strip 70 connected to the guide post 30 and the other end connected to the inner wall of the hub 10. Thus, by providing multiple circumferentially distributed reinforcing strips 70 in the inner cavity 10a, a ring support structure is formed, which significantly enhances the mechanical strength and rigidity of the connection between the guide post 30 and the hub 10, effectively resisting radial / axial loads and alternating stresses.

[0038] In one possible implementation, the hub 10 has an air guide 10b that communicates with the inner cavity 10a. The air guide 10b is located between adjacent blades 40 and is at least partially covered by the blades 40.

[0039] In one possible implementation, a reinforcing block 60 is also included. The reinforcing block 60 is located at the outer edge of the connection between the blade 40 and the hub 10, and the reinforcing strip 70 is fixed to the hub 10 and the blade 40. In this way, by using the reinforcing block 60 to cover the outer edge of the connection between the blade 40 and the hub 10, the load transmitted by the blade 40 can be distributed to a larger contact area of ​​the hub 10, reducing local peak stress (such as shear stress at the edge of the hole in the hub 10) and reducing the risk of crack initiation.

[0040] In one possible implementation, three blades 40 are provided, including a first blade 40, a second blade 40 and a third blade 40, respectively. The end of the first blade 40 near the hub 10 is connected to the lower part of the hub 10, the end of the second blade 40 near the hub 10 is connected to the middle part of the hub 10, and the end of the third blade 40 near the hub 10 is connected to the upper part of the hub 10.

[0041] For example, by connecting the three blades 40 to the lower, middle, and upper parts of the hub 10 respectively, forming a three-dimensional spatial distribution, the overall balance and torsional resistance of the hub 10 structure can be improved, and the vibration risk during rotation can be reduced. Furthermore, by utilizing the differentiated connection positions, the load distribution of the hub 10 is made more uniform, avoiding local stress concentration, which can effectively extend the fatigue life of the hub 10 and the blades 40.

[0042] In one possible implementation, the first blade 40, the second blade 40, and the third blade 40 each have a leading edge 41, an outer edge 42, and a trailing edge 43 connected in sequence. The leading edge 41 curves from one end near the hub 10 to the other end to form an arc shape. The trailing edge 43 includes a first arc-shaped segment 432 and a second arc-shaped segment 431. The first arc-shaped segment 432 is the segment near the hub 10 and is formed by outward convexity, while the second arc-shaped segment 431 is formed by inward concavity. In this way, the fluid impact force can be evenly distributed, reducing the local peak pressure of the leading edge 41 during high-speed rotation and reducing the risk of high-frequency vibration.

[0043] This application also includes an axial flow fan, comprising the axial flow fan blades described in the above embodiments.

[0044] The axial flow fan according to the embodiments of this disclosure uses the above-described axial flow fan blades, and the technical effects are the same as those of the above-described axial flow fan blades, so they will not be repeated here.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An axial flow fan blade, characterized in that, include: A hub, which forms an inner cavity with an opening at one end along the axial direction, has an end cap at one end of the hub opposite to the opening, and the inner cavity has a hollow guide post, which at least partially penetrates the end cap. Multiple blades are circumferentially spaced around the outer periphery of the hub; A locking component includes a locking cover and a hollow extension post. The extension post is disposed on the surface of the locking cover facing the end cover, and a locking part is provided inside the extension post. When the locking cover is connected to the end cover, the extension post and the guide post are sleeved and communicate with each other at one end extending out of the end cover, so that the connecting post extends into the interior of the extension post and is locked by the locking part.

2. The axial flow fan blade according to claim 1, characterized in that, The end cap has multiple slots distributed circumferentially on the end face away from the opening, and the locking cap has multiple locking strips on the surface facing the end cap that are adapted to the slots.

3. The axial flow fan blade according to claim 2, characterized in that, The card slot has symmetrical arc-shaped grooves on both sides that connect to the card slot, and a fixed space is formed between the two arc-shaped grooves. The card strip has a fixing point that matches the fixed space.

4. The axial flow fan blade according to claim 2, characterized in that, The end cap has a recessed area on its end face away from the opening. The portion of the guide post extending out of the end cap is located in the middle of the recessed area. The slot extends from the outer edge of the recessed area to the outer edge of the end cap.

5. The axial flow fan blade according to claim 1, characterized in that, It also includes multiple reinforcing strips located in the inner cavity. All the reinforcing strips are distributed circumferentially around the periphery of the guide post, and one end of the reinforcing strip is connected to the guide post, and the other end is connected to the inner wall of the hub.

6. The axial flow fan blade according to claim 1, characterized in that, The hub has an air duct that communicates with the inner cavity. The air duct is located between adjacent blades and is at least partially covered by the blades.

7. The axial flow fan blade according to claim 6, characterized in that, It also includes a reinforcing block, which is located at the outer edge of the connection between the blade and the hub, and the reinforcing block is fixed to the hub and the blade.

8. The axial flow fan blade according to claim 1, characterized in that, The blade is provided with three blades, namely a first blade, a second blade and a third blade. The end of the first blade near the hub is connected to the lower part of the hub, the end of the second blade near the hub is connected to the middle part of the hub, and the end of the third blade near the hub is connected to the upper part of the hub.

9. The axial flow fan blade according to claim 8, characterized in that, The first blade, the second blade, and the third blade each have a leading edge, an outer edge, and a trailing edge connected in sequence. The leading edge bends from one end near the hub to the other end to form an arc shape. The trailing edge includes a first arc segment and a second arc segment. The first arc segment is the segment near the hub and is formed by outward convexity, while the second arc segment is formed by inward concavity.

10. An axial flow fan, characterized in that, Includes the axial flow fan blades as described in any one of claims 1 to 9.

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