An integrated fan blade assembly and fan for increasing wind force

Abstract

The utility model discloses an integrally formed fan blade assembly and fan of improving wind power, including by the mould integrally formed fan blade and wheel hub connecting shaft, the fan blade includes the wheel hub and a plurality of blades, and the one end of wheel hub connecting shaft is embedded in the mould to form fixed with the circumferential center of wheel hub, at least two above-mentioned blades have the flow hole, and the blade has the blade main part extending from the air inlet end to the air outlet end, and the blade main part has the flow inlet end and the flow outlet end of setting on the opposite side along the first extension direction, and the blade still has the windward side and the leeward side of setting on the opposite side along the thickness direction, the flow hole is through the flow outlet end from the flow inlet end along the first extension direction through the inside of blade main part, and the flow hole is gradually small type setting and is located between the windward side and the leeward side along the first extension direction. Its through the setting of fan blade and wheel hub connecting shaft, simultaneously, the setting of gradually small type flow hole in the blade inside, effectively improves the wind power, and makes this kind of fan blade assembly be suitable for integrally formed production, and easily batch production.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to an integrated molded fan blade assembly and fan for improving wind power. Background Technology

[0002] Taking cooling fans as an example, in order to reduce the noise when the fan blades rotate, the industry has designed a solution to add guide grooves / guide holes / guide channels on the blades. When the fan is working, these guide grooves / guide holes / guide channels guide the air, in order to reduce noise and increase air pressure and air volume.

[0003] For example, CN118346650A discloses a low-noise cooling fan blade, including a mounting sleeve and a fan blade welded to the mounting sleeve. It also includes: a guide block fixedly connected to the fan blade, the guide block being disposed on both sides of the fan blade and arranged in an array; and multiple noise-reducing holes opened on the fan blade, the multiple noise-reducing holes being arranged in an array. In this way, by opening noise-reducing holes and setting guide blocks on the fan blade, the opening design can change the airflow pattern when the fan blade is working, making the airflow smoother when passing through the fan blade, reducing turbulence and the noise generated therefrom. However, the fan blades of this type have a complex structure and are relatively difficult to manufacture. First, the fan blades need to be cast into shape using casting equipment. Then, multiple noise-reducing holes need to be drilled on the fan blades using a drilling device. After drilling, the fan blades are ground. Then, the fan blades with holes are welded onto the mounting sleeve, and the weld seams are ground. Subsequently, the power end of the drive motor needs to be connected to the mounting sleeve. A connection structure (such as threads) needs to be set on the mounting sleeve, or a connecting shaft needs to be installed in the central shaft hole of the mounting sleeve. This further increases the complexity of the structure and manufacturing, making it difficult to mass-produce these fan blades with guide grooves / guide holes / guide channels. Fan blades with guide grooves / guide holes / guide channels are extremely rare on the market.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide an integrated molded fan blade assembly and fan that improves wind power. Through the setting of the fan blade and hub connecting shaft, and the setting of the gradually decreasing flow aid holes inside the blade, the wind power is effectively improved, and this fan blade assembly is suitable for integrated molding and easy to mass-produce.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrally molded fan blade assembly for improving wind power includes fan blades and a hub connecting shaft integrally molded by a mold;

[0008] The fan blade includes a hub and several blades integrally connected to the outer circumference of the hub and arranged at uniform intervals along the circumference; one end of the hub connecting shaft is pre-embedded in the mold to be formed and fixed at the circumference center of the hub, and the other end of the hub connecting shaft serves as the driving end.

[0009] At least two blades have flow-aiding holes, and all blades with flow-aiding holes are arranged at uniform intervals along the circumference of the hub; each blade has a blade body extending from the air inlet end to the air outlet end, and the blade body has a flow-aiding inlet end and a flow-aiding outlet end arranged on opposite sides along a first extension direction, the plane of the flow-aiding outlet end being arranged perpendicular to the hub connecting shaft, and the blade also has a windward side and a leeward side arranged on opposite sides along the thickness direction; the flow-aiding holes penetrate from the flow-aiding inlet end through the interior of the blade body along the first extension direction to the flow-aiding outlet end, and the flow-aiding holes are arranged in a gradually decreasing manner along the first extension direction and are located between the windward side and the leeward side.

[0010] As a preferred embodiment, the fan blades are made of plastic, the hub connecting shaft is made of metal, and one end of the hub connecting shaft is fixed during the injection molding of the fan blades.

[0011] As a preferred embodiment, the fan blade is made of metal material one, the hub connecting shaft is made of metal material two, and the fan blade fixes one end of the hub connecting shaft during metal injection molding or metal die casting.

[0012] As a preferred embodiment, a first annular groove is provided on the outer periphery of one end of the hub connecting shaft, such that a limiting part is formed at both ends of the first annular groove at one end of the hub connecting shaft, and the hub is filled and engaged in the first annular groove, and wraps and fixes the outside of the limiting part at both ends.

[0013] As a preferred embodiment, a second annular groove is provided on the outer periphery of the other end of the hub connecting shaft; the tail of the other end of the hub connecting shaft extends beyond the end face of the hub, and at least a portion of the second annular groove is located within the end face of the hub.

[0014] As a preferred embodiment, the hub includes a panel portion, a peripheral annular portion, a central connecting protrusion, and a reinforcing portion. The peripheral annular portion is integrally connected to the outer periphery of the panel portion and extends around the hub connecting shaft from the air inlet side to the air outlet side. The blades are integrally connected to the outer annular surface of the peripheral annular portion. The inner annular surface of the peripheral annular portion is provided with a plurality of axial reinforcing ribs, which are evenly spaced along the circumference of the peripheral annular portion. The central connecting protrusion is integrally connected to the center of the end face of the panel portion facing the air outlet side. The reinforcing portion includes a reinforcing ring surrounding the outer periphery of the central connecting protrusion and a plurality of radial reinforcing ribs connecting the reinforcing ring and the outer periphery of the central connecting protrusion, which are evenly spaced along the outer periphery of the central connecting protrusion. One end of the hub connecting shaft is embedded in the center of the central connecting protrusion and extends into the interior of the panel portion.

[0015] As a preferred embodiment, the first extension direction of the blade body is arc-shaped.

[0016] As a preferred embodiment, the gas is blown out from the flow-aiding outlet end along the axial direction of the parallel hub connecting shaft through the flow-aiding hole.

[0017] As a preferred embodiment, the blade body has a second extending direction, which is the direction in which the blade body extends from the inner end toward the hub to the outer end of the blade away from the hub.

[0018] One flow-aiding hole is provided on the blade where it is located, and the flow-aiding hole extends along the second extending direction and is configured as a strip-shaped hole;

[0019] Alternatively, two or more flow-aiding holes may be provided on the blade where they are located, and the two or more flow-aiding holes may be arranged at intervals along the second extension direction.

[0020] A fan that utilizes an integrally molded fan blade assembly for enhancing airflow, as described in any of the preceding items.

[0021] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly improves the wind power by setting the fan blade and hub connecting shaft, with the plane of the flow aid outlet end being perpendicular to the hub connecting shaft, and the gradually decreasing flow aid holes inside the blade. This makes the fan blade assembly suitable for one-piece molding. The hub connecting shaft can serve as a central positioning reference for the fan blade during molding. The gradually decreasing flow aid holes facilitate demolding, resulting in a high molding yield and easy mass production. Furthermore, it allows for flexible selection of the hub connecting shaft, which is beneficial for improving the rigidity and rotational stability of the fan blade assembly.

[0022] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a perspective view of the fan blade assembly according to Embodiment 1 of this utility model;

[0024] Figure 2 This is a front view of the air inlet side of the fan blade assembly according to Embodiment 1 of this utility model;

[0025] Figure 3 This is a front view of the air outlet side of the fan blade assembly according to Embodiment 1 of this utility model;

[0026] Figure 4 This is a cross-sectional view of the fan blade assembly according to Embodiment 1 of this utility model;

[0027] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0028] Figure 6 This is an exploded view of the fan blade assembly according to Embodiment 1 of this utility model;

[0029] Figure 7 This is a perspective view of the hub connecting shaft of the fan blade assembly according to Embodiment 1 of this utility model;

[0030] Figure 8 This is a side view of the hub connecting shaft of the fan blade assembly according to Embodiment 1 of this utility model;

[0031] Figure 9 This is another cross-sectional view of the fan blade assembly according to Embodiment 1 of this utility model;

[0032] Figure 10 This is a structural diagram illustrating the gradually decreasing size of the flow-aiding orifice in Embodiment 1 of this utility model (for...). Figure 6 (A magnified view of part A);

[0033] Figure 11 This is a wind direction diagram inside the flow aid hole of the fan blade assembly according to Embodiment 1 of this utility model;

[0034] Figure 12 The PQ curves are for fans with ordinary blades and fans with blades designed with gradually decreasing flow-aiding holes.

[0035] Figure 13 This is a perspective view of the fan blade assembly according to Embodiment 2 of this utility model;

[0036] Figure 14 This is a perspective view of the fan blade assembly according to Embodiment 3 of this utility model. Detailed Implementation

[0037] Please refer to Figures 1 to 14As shown in the accompanying drawings, the specific embodiments of this utility model will be described in detail below.

[0038] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] An integrally molded fan blade assembly for improving wind power includes a fan blade 10 integrally molded from a mold and a hub connecting shaft 20.

[0040] Typically, the fan blade 10 is made of plastic, and the hub connecting shaft 20 is made of metal. In other embodiments, the fan blade 10 may be made of one type of metal, and the hub connecting shaft 20 may be made of another type of metal. One-piece mold molding includes injection molding, metal injection molding (MIM), metal die casting, and magnesium alloy semi-solid injection molding, etc. Injection molding typically refers to injection molding, a common process in mold forming. It involves heating and melting thermoplastic or thermosetting plastic in a heated barrel, then injecting it into a closed mold cavity at a certain pressure and speed through the push of a screw or plunger. After cooling and solidification, a plastic product with the same shape as the mold cavity is obtained. The hub connecting shaft 20 is pre-placed in the mold. After injection molding, the hub connecting shaft is formed and fixed onto the hub 11. Metal injection molding also refers to powder injection molding, and similarly, ceramic injection molding, which is a combination of plastic injection molding, Polymer chemistry, powder metallurgy, and metal materials science are technologies that involve mixing fine powdered metal with binder materials to form a raw material, then using injection molding for shaping and curing, followed by debinding, sintering, and other processes to manufacture metal parts. Metal die casting, specifically integrated die casting, falls under the category of metal die casting and is a metal casting process that uses high pressure to inject liquid metal into a mold, which then cools to form the desired casting. It is applicable to various metal materials, including light metals such as aluminum, zinc, and magnesium, as well as heavy metals such as steel and iron. Magnesium alloy semi-solid injection molding involves feeding granular magnesium alloy raw materials into a barrel at room temperature, heating and shearing them into a semi-solid slurry, and then injecting it at high speed into the mold cavity for shaping.

[0041] The fan blade 10 includes a hub 11 and a plurality of blades 12 integrally connected to the outer circumference of the hub 11 and arranged at uniform intervals along the circumference. Preferably, the first extension direction S1 of the blade body 1201 is arc-shaped. One end of the hub connecting shaft 20 is pre-embedded in the mold to be formed and fixed at the circumferential center of the hub 11, and the other end of the hub connecting shaft 20 serves as the driving end. At least two blades 12 have flow-aiding holes 121, and all blades 12 with flow-aiding holes 121 are arranged at uniform intervals along the circumference of the hub 11. Typically, multiple flow-aiding holes 121 are provided on the blades 12, and the multiple flow-aiding holes 121 are arranged at the end intervals along the starting end of the hub towards the outer side. Preferably, flow-aiding holes 121 are provided on all blades 12 of the fan blade 10, and the number of flow-aiding holes 121 is the same. If different numbers of flow-aiding holes 121 are required, blades 12 with the same number of flow-aiding holes 121 need to be arranged at uniform intervals along the circumference of the hub 11 as the same specification. The blade 12 has a blade body 1201 extending from the air inlet end to the air outlet end. The blade body 1201 has a flow-aiding inlet end S11 and a flow-aiding outlet end S12 arranged on opposite sides along the first extension direction S1. The plane where the flow-aiding outlet end S12 is located is perpendicular to the hub connecting shaft 20. The blade 12 also has a windward side D1 and a leeward side D2 arranged on opposite sides along the thickness direction D. The flow-aiding hole 121 passes through the flow-aiding inlet end S11 along the first extension direction S1 through the interior of the blade body 1201 and extends to the flow-aiding outlet end S12. The flow-aiding hole 121 is arranged in a gradually decreasing manner along the first extension direction S1 and is located between the windward side D1 and the leeward side D2. Preferably, the gas is blown out from the flow-aiding outlet end S12 through the flow-aiding hole 121 along the axial direction L parallel to the hub connecting shaft. Figure 11 The dashed arrow indicates the direction of airflow.

[0042] The blade body 1201 has a second extending direction S2, which refers to the direction in which the blade body 1201 extends from the inner end toward the hub 11 to the outer end of the blade 12 away from the hub 11; Figure 1 In the first embodiment shown, three or more flow-aiding holes 121 are provided on the blade 12 to which they are located, and the three or more flow-aiding holes 121 are arranged at intervals along the second extending direction S2. Figure 13 In the second embodiment shown, one flow-aiding hole 121 is provided on the blade 12 where it is located, and the flow-aiding hole 121 extends along the second extending direction S2 and is configured as a strip-shaped hole; Figure 14 In the third embodiment shown, two or more flow-aiding holes 121 are provided on the blade 12 where they are located, and the two or more flow-aiding holes 121 are arranged at intervals along the second extension direction S2. In comparison, arranging one or two elongated flow-aiding holes 121 on the blade 12 further reduces the manufacturing difficulty and improves the wind power effect.

[0043] A first annular groove 21 is provided on the outer periphery of one end of the hub connecting shaft 20, so that a limiting part 22 is formed at both ends of the first annular groove 21 at one end of the hub connecting shaft 20. The hub 11 is filled and engaged in the first annular groove 21 and covers and fixes the outside of the limiting part 22 at both ends. A second annular groove 23 is provided on the outer periphery of the other end of the hub connecting shaft 20. The tail 24 of the other end of the hub connecting shaft 20 (which is spherical or near-spherical for easy assembly) extends beyond the end face 111 of the hub 11, and at least a portion of the second annular groove 23 is located within the end face 111 of the hub.

[0044] The hub 11 includes a panel portion 1101, a peripheral annular portion 1102, a central connecting protrusion 1103, and a reinforcing portion 1104. The peripheral annular portion 1102 is integrally connected to the outer periphery of the panel portion 1101 and extends around the hub connecting shaft 20 from the air inlet side to the air outlet side. The blade 12 is integrally connected to the outer annular surface of the peripheral annular portion 1102. The inner annular surface of the peripheral annular portion 1102 is provided with a plurality of axial reinforcing ribs 11021, which are evenly spaced along the circumference of the peripheral annular portion 1102. The central connecting protrusion 1103 is integrally connected to the center of the end face 11011 of the panel portion 1101 facing the air outlet side. The reinforcing part 1104 includes a reinforcing ring 11041 surrounding the outer periphery of the central connecting protrusion 1103, and a plurality of radial reinforcing ribs 11042 connecting the reinforcing ring 11041 and the outer periphery of the central connecting protrusion 1103. The plurality of radial reinforcing ribs 11042 are evenly spaced along the outer periphery of the central connecting protrusion 1103. One end of the hub connecting shaft 20 is embedded in the center of the central connecting protrusion 1103 and extends into the interior of the panel part 1101. For example, one end of the hub connecting shaft 20 extends into the interior of the panel part 1101 at about 1 / 2 of the way, which improves the bonding firmness between the hub connecting shaft 20 and the hub 11, which is beneficial to the molding yield and the rotational stability of the fan blade assembly.

[0045] And, a fan is provided that uses an integrally molded fan blade assembly for improving airflow as described in any of the preceding claims.

[0046] The blades are the key part of the fan blades that propel airflow. Their shape, structure and other design affect the performance of the fan blades. Common blade designs come in different forms. For example, the blades in this embodiment are roughly scissor-shaped, and the use of arc / streamlined shapes reduces wind resistance. The hub is the central support structure of the fan blades, used to connect the blades and the hub connecting shaft. The hub structure in this embodiment focuses on many factors such as the rigidity of the fan blades, the feasibility of forming, and the rotational stability. The combination of radial and axial reinforcing ribs is beneficial to improving strength, axial and radial rigidity and resistance to deformation, which is conducive to the stable airflow output of the fan.

[0047] The gradually decreasing flow-aiding holes inside the blades increase the speed of the air blown out after passing through the holes, further increasing the generation of axial airflow and significantly increasing the axial flow rate, thus effectively improving wind power. For fan products of the same power, the solution of this application can achieve a greater wind power effect. If a certain wind power value is required, the power can be reduced, that is, a lower power can achieve the same wind power effect, which can play an energy-saving role.

[0048] like Figure 12 As shown, it displays a comparison chart of the PQ curves of a fan with ordinary fan blades and a fan with fan blades designed with gradually decreasing flow-aiding holes (taking Example 1 as an example). The green curve shows the PQ curve of the fan using ordinary fan blades, and the red curve shows the PQ curve of the fan using fan blades designed with gradually decreasing flow-aiding holes. The diameter of the flow-aiding holes is 3.0 mm at the reference point, 3.2 mm at the large end, and 2.8 mm at the small end. Its air volume is significantly greater than that of ordinary fan blades.

[0049] The key design feature of this invention lies in the arrangement of the fan blade and hub connecting shaft. The plane of the flow aid outlet is perpendicular to the hub connecting shaft. The gradually decreasing flow aid holes inside the blade effectively improve wind power and make this fan blade assembly suitable for one-piece molding. The hub connecting shaft can serve as a central positioning reference for the fan blade during molding. The gradually decreasing flow aid holes facilitate demolding, resulting in high molding yield and easy mass production. Furthermore, the hub connecting shaft can be flexibly selected, which helps to improve the rigidity and rotational stability of the fan blade assembly.

[0050] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A one-piece molded fan blade assembly for improving wind power, characterized in that: Includes a fan blade (10) integrally formed by a mold and a hub connecting shaft (20); The fan blade (10) includes a hub (11) and a number of blades (12) integrally connected to the outer periphery of the hub (11) and arranged at uniform intervals along the circumference; one end of the hub connecting shaft (20) is pre-embedded in the mold to be formed and fixed at the circumferential center of the hub (11), and the other end of the hub connecting shaft (20) serves as the driving end; At least two blades (12) have flow-aiding holes (121), and all blades (12) with flow-aiding holes (121) are arranged at uniform intervals along the circumference of the hub (11); each blade (12) has a blade body (1201) extending from the air inlet end to the air outlet end, and the blade body (1201) has a flow-aiding inlet end (S11) and a flow-aiding outlet end (S12) arranged on opposite sides along the first extension direction (S1), and the flow-aiding outlet end (S12) is located on the same plane. The blade (12) is perpendicular to the hub connecting shaft (20). The blade (12) also has a windward side (D1) and a leeward side (D2) arranged on opposite sides along the thickness direction (D). The flow aid hole (121) passes through the flow aid outlet end (S12) of the blade body (1201) along the first extension direction (S1) from the flow inlet end (S11). The flow aid hole (121) is arranged in a gradually decreasing manner along the first extension direction (S1) and is located between the windward side (D1) and the leeward side (D2).

2. The one-piece molded fan blade assembly for improving wind power according to claim 1, characterized in that: The fan blade (10) is made of plastic, and the hub connecting shaft (20) is made of metal. When the fan blade (10) is injection molded, one end of the hub connecting shaft (20) is fixed.

3. The one-piece molded fan blade assembly for improving wind power according to claim 1, characterized in that: The fan blade (10) is made of metal material one, and the hub connecting shaft (20) is made of metal material two. The fan blade (10) fixes one end of the hub connecting shaft (20) during metal injection molding or metal die casting.

4. The one-piece molded fan blade assembly for improving wind power according to claim 1, characterized in that: The hub connecting shaft (20) has a first annular groove (21) on its outer periphery, so that a limiting part (22) is formed at one end of the hub connecting shaft (20) at both ends of the first annular groove (21). The hub (11) is filled and combined in the first annular groove (21) and wraps and fixes the limiting part (22) at both ends of the hub.

5. The one-piece molded fan blade assembly for improving wind power according to claim 1, characterized in that: The other end of the hub connecting shaft (20) is provided with a second annular groove (23); the tail of the other end of the hub connecting shaft (20) extends beyond the end face (111) of the hub (11), and at least a portion of the second annular groove (23) is located within the end face (111) of the hub.

6. The one-piece molded fan blade assembly for improving wind power according to claim 1, characterized in that: The hub (11) includes a panel portion (1101), a peripheral annular portion (1102), a central connecting protrusion (1103), and a reinforcing portion (1104). The peripheral annular portion (1102) is integrally connected to the outer periphery of the panel portion (1101) and extends from the air inlet side to the air outlet side around the hub connecting shaft (20). The blade (12) is integrally connected to the outer annular surface of the peripheral annular portion (1102). The inner annular surface of the peripheral annular portion (1102) is provided with a plurality of axial reinforcing ribs (11021). The axial reinforcing ribs (11021) are evenly spaced along the circumference of the peripheral annular portion (1102). The central connecting protrusion (1104) is... The connecting protrusion (1103) is integrally connected to the center of the end face (11011) facing the air outlet side on the panel part (1101). The reinforcing part (1104) includes a reinforcing ring (11041) surrounding the outer periphery of the central connecting protrusion (1103) and a plurality of radial reinforcing ribs (11042) connecting the reinforcing ring (11041) and the outer periphery of the central connecting protrusion (1103). The plurality of radial reinforcing ribs (11042) are evenly spaced along the outer periphery of the central connecting protrusion (1103). One end of the hub connecting shaft (20) is embedded in the center of the central connecting protrusion (1103) and extends into the interior of the panel part (1101).

7. The one-piece molded fan blade assembly for improving wind power according to claim 1, characterized in that: The first extension direction (S1) of the blade body (1201) is arc-shaped.

8. The one-piece molded fan blade assembly for improving wind power according to claim 1, characterized in that: Gas is blown out from the flow outlet end (S12) through the flow aid hole (121) along the axial direction (L) of the parallel hub connecting shaft.

9. A one-piece molded fan blade assembly for improving wind power according to any one of claims 1 to 8, characterized in that: The blade body (1201) has a second extending direction (S2), which is the direction in which the blade body (1201) extends from the inner end toward the hub (11) toward the outer end of the blade (12) away from the hub (11); The flow aid hole (121) is provided on the blade (12) where it is located, and the flow aid hole (121) extends along the second extension direction (S2) and is provided as a strip hole; Alternatively, two or more flow-aiding holes (121) may be provided on the blade (12) where they are located, and the two or more flow-aiding holes (121) may be arranged at intervals along the second extension direction (S2).

10. A fan, characterized in that: The application includes an integrally molded fan blade assembly for improving wind power as described in any one of claims 1 to 9.

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