Axial flow wind wheel and fan equipment

Abstract

The axial flow wind wheel comprises a hub and a plurality of fan blades, the fan blades are arranged on the peripheral side of the hub and arranged at intervals in the circumferential direction of the hub, each fan blade comprises a blade body, a reinforcing part and a plurality of reinforcing ribs, and each blade body is provided with a front edge and a suction surface; the reinforcing part is arranged at the front edge, and the reinforcing part extends along the front edge and is connected with the hub; the multiple reinforcing ribs are arranged on the suction surface at intervals and are adjacent to the front edge, and each reinforcing rib is connected between the reinforcing part and the hub. According to the axial flow wind wheel, the structural strength of the front edges and the blade roots of the wind blades is high, the problem that the blade tips of the wind blades are prone to vibration and deformation in the operation process is solved, the problem that the blade tips of the wind blades are prone to breakage from the blade roots is also solved, and the use reliability and stability of the wind blades are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to an axial flow fan wheel and a fan device. Background Art

[0002] Existing fans in air conditioner outdoor units mostly use axial-flow impellers. During use, due to the high speed of the axial-flow impellers, the airflow velocity at the leading edge of the impeller blades is high, causing vibration and deformation at the blade tips. This reduces operational stability and compromises efficient heat dissipation and cooling. Furthermore, because stress is concentrated at the blade roots during rotation, the blades are prone to breakage at the base, reducing their reliability and increasing safety risks. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes an axial flow wind wheel, the leading edge and the root of the fan blade of the axial flow wind wheel have high structural strength, which avoids the problem of the fan blade tip being easily vibrated and deformed during operation, and also avoids the problem of easy breakage at the root of the fan blade, thereby improving the reliability and stability of the fan blade.

[0005] The embodiment of the present invention further provides a wind turbine device including the above-mentioned axial flow wind wheel.

[0006] The axial flow wind wheel of the embodiment of the present invention comprises a hub and a plurality of blades, wherein the plurality of blades are arranged on the outer peripheral side of the hub and spaced apart along the circumference of the hub, and the blades comprise:

[0007] a blade body having a leading edge and a suction surface;

[0008] a reinforcement portion, the reinforcement portion being provided at the leading edge, the reinforcement portion extending along the leading edge and connected to the hub;

[0009] A plurality of reinforcing ribs are arranged at intervals on the suction surface and adjacent to the leading edge, and each of the reinforcing ribs is connected between the reinforcing portion and the hub.

[0010] In some embodiments, the plurality of reinforcing ribs include a first rib and a second rib, the first rib is located between the reinforcing portion and the second rib, and the first rib and the second rib are spaced apart in the circumferential direction of the hub.

[0011] In some embodiments, a thickness dimension H1 of the first rib in the circumferential direction of the hub is greater than a thickness dimension H2 of the second rib in the circumferential direction of the hub.

[0012] In some embodiments, the difference between the thickness dimension H1 and the thickness dimension H2 is 0.5 mm to 0.8 mm.

[0013] In some embodiments, the first rib and the second rib are both arc-shaped, and both the first rib and the second rib are convex toward a side away from the reinforcing portion.

[0014] In some embodiments, the curvature of the first rib is 0.014 to 0.015;

[0015] And / or, the curvature of the second rib is 0.012 to 0.014.

[0016] In some embodiments, a distance a between a connection point between the first rib and the hub and a connection point between the reinforcement portion and the hub is 8 mm to 12 mm;

[0017] And / or, a distance b between a connection point between the first rib and the hub and a connection point between the second rib and the hub is 3 mm to 5 mm.

[0018] In some embodiments, the thickness dimension H of the reinforcing rib in the circumferential direction of the hub is 2 mm to 4 mm;

[0019] And / or, the reinforcing ribs are arranged parallel to the axial direction of the hub.

[0020] In some embodiments, the suction surface faces the wind inlet side of the blade body, and the surface of the reinforcing rib facing the wind inlet side is flush with the surface of the hub facing the wind inlet side.

[0021] In some embodiments, the wind blade includes a transition section, which is connected between the reinforcing rib and the reinforcing portion, and the transition section bends and extends from the reinforcing rib to the reinforcing portion toward the wind inlet side.

[0022] In some embodiments, the width dimension M of the reinforcement portion is 7 mm to 8 mm;

[0023] And / or, the thickness K of the reinforcement portion is 0.8 mm to 1.2 mm;

[0024] And / or, the surface of the reinforcement portion and the suction surface are smoothly connected.

[0025] The wind turbine device of the embodiment of the present invention includes the axial flow wind wheel as described in any of the above embodiments.

[0026] Beneficial effects: the axial flow fan and the fan equipment of the utility model embodiment, the structural strength of the front edge and the blade root of the fan blade of the axial flow fan is high, the problem that the blade tip of the fan blade is easy to vibrate and deform in the running process is avoided, the problem that the blade root is easy to break is also avoided, and the reliability and stability of the fan blade use are improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the axial flow fan of the utility model embodiment along the axial view schematic diagram.

[0028] Figure 2 is the three-dimensional schematic diagram of the axial flow fan of the utility model embodiment.

[0029] Figure 3 is Figure 2 the local enlarged schematic diagram of A in it.

[0030] Figure 4 is Figure 2 the local enlarged schematic diagram of B in it.

[0031] Figure 5 is the lateral schematic diagram of the axial flow fan of the utility model embodiment.

[0032] Figure 6 is Figure 5 the local enlarged schematic diagram of C in it.

[0033] REFERENCE SIGNS:

[0034] 1-hub;11-upper end face;

[0035] 2-fan blade;21-blade body;211-front edge;212-suction surface;22-strengthening part;23-stiffener;231-first rib;232-second rib;233-upper side;24-transition section. DETAILED DESCRIPTION

[0036] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as the limitation of the utility model.

[0037] As Figure 1 shown, the axial flow fan of the utility model embodiment includes hub 1 and multiple fan blades 2, and the multiple fan blades 2 are arranged on the outer circumferential side of hub 1 and are arranged along the circumferential direction of hub 1. Wherein hub 1 can be generally in the hat-shaped structure, that is, hub 1 is provided with a recess, such as Figure 2As shown, the closed end of the hub 1 can face the air inlet side, and the notch of the groove of the hub 1 can face the air outlet side. There can be three fan blades 2, and the three fan blades 2 can be integrally molded on the outer circumference of the hub 1, and the three fan blades 2 can be evenly spaced along the circumference of the hub 1.

[0038] like Figure 1 As shown, the shapes of the above-mentioned multiple blades 2 can be the same, and each blade 2 includes a blade body 21, a reinforcement portion 22 and a plurality of reinforcement ribs 23. The blade body 21 can be integrally injection-molded with the hub 1. The blade body 21 has a leading edge 211, wherein the leading edge 211 can be the side edge located at the front side during the circumferential rotation of the blade body 21. The blade body 21 also has a trailing edge, and the leading edge 211 and the trailing edge are arranged oppositely in the circumferential direction of the hub 1. The blade body 21 also has a suction surface 212, as shown in FIG. Figure 2 As shown, the suction surface 212 may be the surface of the blade body 21 facing the wind inlet side.

[0039] The reinforcement portion 22 is provided at the leading edge 211, and the reinforcement portion 22 extends along the leading edge 211 and is connected to the hub 1. For example, Figure 1 As shown, the leading edge 211 can be arranged on the leading edge 211 of the blade body 21 by integral injection molding, the reinforcement portion 22 can be extended along the extension direction of the leading edge 211 and can cover the entire leading edge 211, and in the radial direction along the hub 1, the inner end of the reinforcement portion 22 can be directly connected to the hub 1.

[0040] A plurality of reinforcing ribs 23 are arranged at intervals on the suction surface 212 and adjacent to the leading edge 211, and each reinforcing rib 23 is connected between the reinforcing portion 22 and the hub 1. For example, Figure 1 As shown, the number of reinforcing ribs 23 can be two, three, or four. Multiple reinforcing ribs 23 can be formed on the suction surface 212 of the blade body 21 by injection molding. The reinforcing portion 22 and the hub 1 can be angled, and the reinforcing ribs 23 can be located within this angled structure. One end of each reinforcing rib 23 can be connected to the hub 1, and the other end of each reinforcing rib 23 can be connected to the reinforcing portion 22.

[0041] In the axial flow wind wheel of the embodiment of the utility model, the setting of the reinforcement part 22 plays a role in enhancing the structural strength of the leading edge 211. Since the structural strength of the leading edge 211 is relatively high, the tip of the wind blade 2 can be prevented from vibrating and deforming easily, thereby improving the stability of operation.

[0042] Secondly, the provision of multiple reinforcing ribs 23 can enhance the strength of the connection structure between the blade body 21 and the hub 1, thereby achieving structural reinforcement of the root of the blade body 21, avoiding the situation where the blade root is easily broken during high-speed rotation, further improving the stability and reliability of use, and extending the service life.

[0043] In addition, since the reinforcement ribs 23 are arranged on the suction surface 212, it is also avoided that the situation in which the wind wheel performance is easily reduced and loud noise is generated when the reinforcement ribs 23 are arranged on the pressure surface is avoided.

[0044] In some embodiments, the plurality of reinforcing ribs 23 include a first rib 231 and a second rib 232 . The first rib 231 is located between the reinforcing portion 22 and the second rib 232 . The first rib 231 and the second rib 232 are spaced apart in the circumferential direction of the hub 1 .

[0045] For example, Figure 3 As shown, only two reinforcing ribs 23 may be provided, namely a first rib 231 and a second rib 232. In the circumferential direction of the hub 1, the first rib 231 is located between the reinforcing portion 22 and the second rib 232. A triangular groove structure may be defined between the first rib 231 and the reinforcing portion 22, while a trapezoidal groove structure may be defined between the first rib 231 and the second rib 232.

[0046] In some embodiments, as Figure 3 As shown, the thickness dimension H1 of the first rib 231 in the circumferential direction of the hub 1 is greater than the thickness dimension H2 of the second rib 232 in the circumferential direction of the hub 1. Because the first rib 231 is closer to the reinforcement portion 22 than the second rib 232, the thickness dimension H1 of the first rib 231 being greater than the thickness dimension H2 of the second rib 232 can ensure that the overall structural strength of the first rib 231 is higher than that of the second rib 232, thereby further enhancing the structural strength of the root region of the reinforcement portion 22 and further preventing blade root fracture.

[0047] In some embodiments, the difference between thickness dimension H1 and thickness dimension H2 is 0.5 mm to 0.8 mm. For example, the difference can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, etc. This allows the thickness difference between the two to be controlled within a reasonable range, achieving lightweighting and cost reduction while also fully ensuring the structural strength of the first rib 231 and the second rib 232.

[0048] In some embodiments, as Figure 3 As shown, the first rib 231 and the second rib 232 are both arc-shaped, for example, they can be circular arc-shaped, and both the first rib 231 and the second rib 232 are convex toward the side away from the reinforcement portion 22. This allows the reinforcement rib 23 to have a high structural strength, fully meeting the need to withstand high wind pressure from the leading edge 211 side.

[0049] In some embodiments, the curvature of the first rib 231 is 0.014 to 0.015. For example, the curvature of the first rib 231 can be 0.014, 0.0141, 0.0142, 0.0143, 0.0144, 0.0145, 0.0146, 0.0147, 0.0148, 0.0149, 0.015, etc., thereby controlling the curvature of the first rib 231 within a reasonable range, ensuring the structural strength of the first rib 231 and simplifying the processing and forming of the first rib 231.

[0050] In some embodiments, the curvature of the second rib 232 is 0.012 to 0.014. For example, the curvature of the second rib 232 can be 0.012, 0.0121, 0.0122, 0.0126, 0.0127, 0.0128, 0.0129, 0.0130, 0.0131, 0.0132, 0.0134, 0.0135, 0.0137, 0.0139, 0.014, etc., thereby controlling the curvature of the second rib 232 within a reasonable range, ensuring the structural strength of the second rib 232 and simplifying the processing and forming of the second rib 232.

[0051] In some embodiments, the distance a between the connection between the first rib 231 and the hub 1 and the connection between the reinforcement portion 22 and the hub 1 is 8 mm to 12 mm. Figure 3 As shown, the distance a can be 8mm, 9mm, 10mm, 11mm, 12mm, etc., so that the distance a can be controlled within a reasonable range, avoiding the situation where the distance a is too large and the first rib 231 cannot effectively strengthen the local structure, and also avoiding the situation where the distance a is too small and it is not convenient for the first rib 231 to be processed and formed.

[0052] In some embodiments, the distance b between the connection between the first rib 231 and the hub 1 and the connection between the second rib 232 and the hub 1 is 3 mm to 5 mm. Figure 3 As shown, the distance b can be 3mm, 4mm, 5mm, etc., so that the distance b can be controlled within a reasonable range, which avoids the situation where the distance b is too large and the second rib 232 cannot effectively strengthen the local structure, and also avoids the situation where the distance b is too small and it is not convenient to process and shape the first rib 231 and the second rib 232.

[0053] In some embodiments, the thickness H of the reinforcing rib 23 in the circumferential direction of the hub 1 is 2 mm to 4 mm. Figure 2 As shown, the thickness dimension H can be 2 mm, 3 mm, 4 mm, etc. This not only ensures the structural strength of the reinforcing rib 23, but also limits the material used for the reinforcing rib 23 and controls the cost.

[0054] In some embodiments, the reinforcement ribs 23 are arranged parallel to the axial direction of the hub 1. For example, Figure 5 As shown, the axial direction of the hub 1 can be generally in the up and down direction, and the reinforcing ribs 23 can be arranged in a vertical plane as a whole, which is beneficial to further enhance the structural reinforcement effect of the reinforcing ribs 23.

[0055] In some embodiments, the suction surface 212 faces the windward side of the blade body 21 , and the surface of the reinforcing rib 23 facing the windward side is flush with the surface of the hub 1 facing the windward side.

[0056] For example, Figure 5 As shown, the surface of the rib 23 facing the air inlet side can be the upper side surface 233 of the rib 23, and the surface of the hub 1 facing the air inlet side can be the upper end surface 11 of the hub 1. The upper side surface 233 and the upper end surface 11 can be substantially in the same horizontal plane. This not only achieves effective support between the blade body 21 and the hub 1, ensuring sufficient support, but also prevents the rib 23 from protruding, facilitating the subsequent installation of components such as the motor and avoiding interference.

[0057] In some embodiments, the fan blade 2 includes a transition section 24 , which is connected between the reinforcement rib 23 and the reinforcement portion 22 , and the transition section 24 bends and extends from the reinforcement rib 23 to the reinforcement portion 22 toward the wind inlet side.

[0058] For example, Figure 6 As shown, the transition section 24 can be generally arc-shaped and can be integrally formed between the outer end of each reinforcing rib 23 and the reinforcing portion 22 by injection molding. The inner end of the transition section 24 can be smoothly connected to the surface of the reinforcing rib 23, and the outer end of the transition section 24 can be bent toward the air inlet side and smoothly connected to the reinforcing portion 22. This ensures the structural strength of the connection between the reinforcing rib 23 and the reinforcing portion 22, allowing the reinforcing rib 23 and the reinforcing portion 22 to form an integrated design.

[0059] In some embodiments, the width dimension M of the reinforcement portion 22 is 7 mm to 8 mm. Figure 4 As shown, the width dimension M can be 7 mm, 7.5 mm, 8 mm, etc. Thus, the structural strength of the reinforcement portion 22 is fully guaranteed, and the use requirement of withstanding wind pressure is met.

[0060] In some embodiments, the thickness K of the reinforcement portion 22 is 0.8 mm to 1.2 mm. Figure 5 As shown, the thickness dimension K can be 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, etc. This further ensures the structural strength of the reinforcement portion 22 and meets the use requirement of withstanding wind pressure.

[0061] In some embodiments, the surface of the reinforcement portion 22 is smoothly connected to the suction surface 212. For example, the surface of the reinforcement portion 22 can be connected to the suction surface 212 through rounded corners, curved surfaces, etc., thereby fully ensuring the integrity of the connection, facilitating the elimination of stress concentration and ensuring structural strength.

[0062] The following describes the fan equipment according to the embodiment of the present invention.

[0063] The fan device of the embodiment of the present invention includes an axial flow fan wheel, which can be the axial flow fan wheel described in any of the above embodiments. The fan device can be an air conditioner outdoor unit, and of course can also be a car air conditioner, a special air conditioner, a fan, an industrial fan, and other fan devices.

[0064] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. An axial flow wind wheel, characterized in that: The invention comprises a hub (1) and a plurality of blades (2), wherein the plurality of blades (2) are arranged on the outer peripheral side of the hub (1) and are spaced apart along the circumference of the hub (1), and the blades (2) comprise: a blade body (21), wherein the blade body (21) has a leading edge (211) and a suction surface (212); a reinforcement portion (22), the reinforcement portion (22) being provided on the leading edge (211), the reinforcement portion (22) extending along the leading edge (211) and connected to the wheel hub (1); A plurality of reinforcing ribs (23) are provided at intervals on the suction surface (212) and adjacent to the leading edge (211), and each of the reinforcing ribs (23) is connected between the reinforcing portion (22) and the hub (1).

2. The axial flow wind wheel according to claim 1, characterized in that: The plurality of reinforcing ribs (23) include a first rib (231) and a second rib (232), wherein the first rib (231) is located between the reinforcing portion (22) and the second rib (232), and the first rib (231) and the second rib (232) are spaced apart in the circumferential direction of the hub (1).

3. The axial flow wind wheel according to claim 2, characterized in that: A thickness dimension H1 of the first rib (231) in the circumferential direction of the hub (1) is greater than a thickness dimension H2 of the second rib (232) in the circumferential direction of the hub (1).

4. The axial flow wind wheel according to claim 3, characterized in that: The difference between the thickness dimension H1 and the thickness dimension H2 is 0.5 mm to 0.8 mm.

5. The axial flow wind wheel according to claim 2, characterized in that: The first rib (231) and the second rib (232) are both arc-shaped, and both the first rib (231) and the second rib (232) are convex toward a side away from the reinforcing portion (22).

6. The axial flow wind wheel according to claim 5, characterized in that: The curvature of the first rib (231) is 0.014 to 0.015; And / or, the curvature of the second rib (232) is 0.012 to 0.

014.

7. The axial flow wind wheel according to claim 2, characterized in that: A distance a between a connection point between the first rib (231) and the hub (1) and a connection point between the reinforcement portion (22) and the hub (1) is 8 mm to 12 mm; And / or, a distance b between a connection point between the first rib (231) and the wheel hub (1) and a connection point between the second rib (232) and the wheel hub (1) is 3 mm to 5 mm.

8. The axial flow wind wheel according to claim 1, characterized in that: The thickness dimension H of the reinforcing rib (23) in the circumferential direction of the hub (1) is 2 mm to 4 mm; And / or, the reinforcing ribs (23) are arranged parallel to the axial direction of the hub (1).

9. The axial flow wind wheel according to claim 1, characterized in that: The suction surface (212) faces the wind inlet side of the blade body (21), and the surface of the reinforcing rib (23) facing the wind inlet side is flush with the surface of the hub (1) facing the wind inlet side.

10. The axial flow wind wheel according to claim 9, characterized in that: The fan blade (2) includes a transition section (24), the transition section (24) being connected between the reinforcing rib (23) and the reinforcing portion (22), and the transition section (24) being bent and extended from the reinforcing rib (23) to the reinforcing portion (22) in the direction of the air inlet side.

11. The axial flow wind wheel according to any one of claims 1 to 10, characterized in that: The width dimension M of the reinforcement portion (22) is 7 mm to 8 mm; And / or, the thickness dimension K of the reinforcement portion (22) is 0.8 mm to 1.2 mm; And / or, the surface of the reinforcement portion (22) and the suction surface (212) are smoothly connected.

12. A fan device, characterized in that: The utility model comprises an axial flow wind wheel as claimed in any one of claims 1 to 11.

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