Efficient axial flow fan blade structure

Abstract

The utility model relates to the technical field of fan blades, and discloses an efficient axial flow fan blade structure which comprises a hub. The blades are uniformly arranged on the peripheral surface of the hub; each blade is provided with a front edge, an outer edge, a rear edge and an inner edge; the inner edge is spirally arranged on the peripheral face of the hub, and the outer edge and the inner edge are oppositely arranged. The front edge is connected with the inner edge and the outer edge; the rear edge is connected with the inner edge and the outer edge and is opposite to the front edge; the connection position of the front edge and the inner edge is the upper part of the blade tail; the connection position of the rear edge and the inner edge is the lower part of the blade tail; and the ratio of the distance between the upper parts of the blade tails of the adjacent blades to the distance between the lower parts of the blade tails of the adjacent blades is 0.7-1.3, so that the air inlet amount of the fan blade is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fan blades, and particularly relates to an efficient axial-flow fan blade structure. Background Art

[0002] During the use of a fan, the fan blade is fixed on a hub and rotates, and the power of the fan blade is driven by a motor inside the hub.

[0003] The size of the fan wind mainly depends on the design of the fan blade. The number, shape, inclination angle, and material of the fan blade will directly affect the wind force. Due to the design defects in the structural dimensions of the existing fan blades on the market, the air volume blown out is small during the rotation of the fan blades.

[0004] Therefore, improvements need to be made. Content of the Utility Model

[0005] The technical problem solved by the utility model is to provide an efficient axial-flow fan blade structure to solve the problems mentioned in the above background art in view of the defects existing in the above-mentioned prior art.

[0006] To solve the above technical problem, the technical solution adopted by the utility model is as follows: an efficient axial-flow fan blade structure, comprising: a hub; blades, the blades are uniformly arranged on the outer peripheral surface of the hub; the blades have a leading edge, an outer edge, a trailing edge, and an inner edge; wherein, the inner edge is spirally arranged on the outer peripheral surface of the hub, and the outer edge is oppositely arranged with the inner edge; the leading edge is respectively connected to the inner edge and the outer edge; the trailing edge is respectively connected to the inner edge and the outer edge, and the trailing edge is oppositely arranged with the leading edge; the connection position of the leading edge and the inner edge is the upper part of the blade tail; the connection position of the trailing edge and the inner edge is the lower part of the blade tail; the ratio of the distance between the upper parts of the blade tails of adjacent blades to the distance between the lower parts of the blade tails of adjacent blades is 0.7 to 1.3.

[0007] Further, the ratio of the length of the inner edge to the length of the outer edge is 0.3 to 0.8.

[0008] Further, the ratio of the length of the leading edge to the length of the trailing edge is 0.8 to 1.2.

[0009] Further, the outer edge rotates around the center line of the hub to form an equal-diameter contour from the air inlet direction to the air outlet direction.

[0010] Further, the connection position of the leading edge and the outer edge is the upper part of the blade tip; the leading edge extends radially from the hub and presents an arc shape; wherein, the extension lines of the upper parts of the blade tails of adjacent blades, the leading edges of adjacent blades, and the upper parts of the blade tips of adjacent blades form an air inlet area for air flow to enter.

[0011] Furthermore, the connection position between the trailing edge and the outer edge is at the lower part of the blade tip, and the trailing edge extends radially from the hub in an arc shape; wherein, the extension lines of the lower part of the blade tails of adjacent blades, the trailing edges of adjacent blades, and the lower part of the blade tips of adjacent blades form an air outlet area for air flow to be blown out.

[0012] Furthermore, the upper part of the blade tip bends and extends to protrude above the upper part of the hub, so as to increase the pumping of the air flow by the upper part of the blade tip during rotation.

[0013] Furthermore, the hub has a receiving portion that is recessed inward.

[0014] Furthermore, a rotating shaft is provided at the center line position of the exposed part in the receiving portion.

[0015] Furthermore, a magnetic ring is provided on the inner side wall of the receiving portion.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. Regarding the structure of the fan blade, by restricting the ratio of the distance between the upper parts of the blade tails and the distance between the lower parts of the blade tails, when the fan blade rotates, the air flow can be pumped and blown out, increasing the air volume.

[0018] 2. Further, by restricting the ratio of the length of the inner edge to the outer edge and the ratio of the length of the leading edge to the trailing edge, and thus restricting the ratio of the blade, the air volume is increased.

[0019] 3. When the outer edge rotates, it forms an equal-diameter contour to pump and blow out the air flow.

[0020] 4. By protruding the upper part of the blade tip above the upper part of the hub, the area of the blade in contact with the air flow pumping is increased, the pumped air volume is increased, and more air is blown out. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present utility model.

[0022] Figure 2 is a schematic structural diagram of the present utility model from another angle.

[0023] Figure 3 is a schematic structural diagram of the present utility model.

[0024] Figure 4 is a schematic diagram of the air inlet area of the present utility model.

[0025] Figure 5 is a schematic diagram of the air outlet area of the present utility model.

[0026] Figure 6 is a front view schematic diagram of the present utility model.

[0027] Figure 7 This is a schematic cross-sectional view of the present utility model.

[0028] Figure 8 This is a schematic structural view of another angle of the present utility model.

[0029] Reference numerals in the drawings: 1, wheel hub; 2, blade; 3, leading edge; 4, outer edge; 5, trailing edge; 6, inner edge; 7, upper part of the blade tail; 8, lower part of the blade tail; 9, upper part of the blade tip; 10, air inlet area; 11, lower part of the blade tip; 12, air outlet area; 13, storage part; 14, rotating shaft; 15, magnetic ring. Detailed implementation manners

[0030] The present utility model will be further described in detail below with reference to the drawings.

[0031] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation of the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "several" and "multiple" is two or more, unless otherwise specifically defined. In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application may be understood according to specific circumstances. In the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0032] As Figure 1-3As shown in the figure, an efficient axial flow fan blade structure is provided, including: a hub 1; blades 2, which are uniformly arranged on the outer peripheral surface of the hub 1; the blades 2 have a leading edge 3, an outer edge 4, a trailing edge 5 and an inner edge 6; wherein, the inner edge 6 is spirally arranged on the outer peripheral surface of the hub 1, and the outer edge 4 is arranged opposite to the inner edge 6; the leading edge 3 is respectively connected to the inner edge 6 and the outer edge 4; the trailing edge 5 is respectively connected to the inner edge 6 and the outer edge 4, and the trailing edge 5 is arranged opposite to the leading edge 3; the connection position of the leading edge 3 and the inner edge 6 is the upper part of the blade tail 7; the connection position of the trailing edge 5 and the inner edge 6 is the lower part of the blade tail 8; the ratio of the spacing between the upper parts of the blade tails 7 of adjacent blades 2 to the spacing between the lower parts of the blade tails 8 of adjacent blades 2 is 0.7 to 1.3.

[0033] In view of the technical problems recorded in the background art, an efficient axial flow fan blade structure is provided. The hub 1 is used for installing the blades 2. The blades 2 are distributed on the outer peripheral surface of the hub 1 in a circumferential array manner. The blades 2 and the hub 1 are of an integral structure or an independent structure. When an independent structure is adopted, the blades 2 are assembled with the hub 1 by a connecting structure. Preferably, the blades 2 and the hub 1 are of an integral structure. The blade 2 is a sheet-like structure formed by sequentially connecting a leading edge 3, an outer edge 4, a trailing edge 5 and an inner edge 6. Among them, the inner edge 6 extends along the center line direction of the hub 1, the outer edge 4 is arranged opposite to the inner edge 6, and the leading edge 3 is arranged opposite to the trailing edge 5. The intersection area of the leading edge 3 and the inner edge 6 is defined as the upper part of the blade tail 7, and the intersection area of the trailing edge 5 and the inner edge 6 is defined as the lower part of the blade tail 8. In practice, when the ratio of the spacing dimension between the upper parts of the blade tails 7 between adjacent blades 2 to the spacing dimension between the lower parts of the blade tails 8 between adjacent blades 2 is between 0.7 and 1.3, when the fan blade rotates, it can pump more air volume and increase the blown air volume. For example, the ratio of the spacing dimension between the upper parts of the blade tails 7 between adjacent blades 2 to the spacing dimension between the lower parts of the blade tails 8 between adjacent blades 2 is 0.7; the ratio of the spacing dimension between the upper parts of the blade tails 7 between adjacent blades 2 to the spacing dimension between the lower parts of the blade tails 8 between adjacent blades 2 is 1; the ratio of the spacing dimension between the upper parts of the blade tails 7 between adjacent blades 2 to the spacing dimension between the lower parts of the blade tails 8 between adjacent blades 2 is 1.3.

[0034] Furthermore, the ratio of the length of the inner edge 6 to the length of the outer edge 4 is 0.3 to 0.8. In practice, when restricting the ratio between the length of the inner edge 6 and the length of the outer edge 4, restricting the inner edge 6 on the fan blade hub 1 and the outer edge 4 far from the hub 1 can also increase the air volume pumped when the fan blade rotates. For example, the ratio of the length of the inner edge 6 to the ratio of the length of the outer edge 4 is 0.3, the ratio of the length of the inner edge 6 to the ratio of the length of the outer edge 4 is 0.5, and the ratio of the length of the inner edge 6 to the ratio of the length of the outer edge 4 is 0.8.

[0035] Further, the ratio of the length of the leading edge 3 to the length of the trailing edge 5 is 0.8 to 1.2. In practice, when restricting the ratio between the length of the leading edge 3 and the length of the trailing edge 5, it is also possible to increase the amount of air pumped when the fan blade rotates, thereby pumping more air volume. For example, the ratio of the length of the leading edge 3 to the length of the trailing edge 5 is 0.8; the ratio of the length of the leading edge 3 to the length of the trailing edge 5 is 1; the ratio of the length of the leading edge 3 to the length of the trailing edge 5 is 1.2.

[0036] By restricting the ratio of the blade 2 to the hub 1 through the above dimensions, the pumping of the air flow is further increased, and the blown air volume is increased.

[0037] Specifically, the outer edge 4 rotates around the center line of the hub 1 to form an equal-diameter contour from the air inlet direction to the air outlet direction.

[0038] As a preferred technical solution, in the design of the outer edge 4, when the blade 2 rotates around the center line of the hub 1, the moving contour formed by the rotation of the outer edge 4 is an equal-diameter contour, that is, it presents the form of the outer peripheral surface of a cylinder, thereby improving the pumping of the air flow and increasing the blown air volume.

[0039] Reference Figure 3 and 4 As shown in the figure, the connection position of the leading edge 3 and the outer edge 4 is the upper part of the blade tip 9; the leading edge 3 extends radially from the hub 1 and presents an arc shape; among them, the upper part of the blade tail 7 of the adjacent blade 2, the leading edge 3 of the adjacent blade 2, and the extension line of the upper part of the blade tip 9 of the adjacent blade 2 form an air inlet area 10 for the air flow to enter.

[0040] In practice, the junction area of the leading edge 3 and the outer edge 4 is defined as the upper part of the blade tip 9, and the leading edge 3 is in an arc shape. Therefore, when the blade 2 rotates, it can more easily cut the air flow and pump the air flow into the air inlet area 10 formed by the upper part of the blade tail 7 of the adjacent blade 2, the leading edge 3 of the adjacent blade 2, and the extension line of the upper part of the blade tip 9 of the adjacent blade 2.

[0041] Reference Figure 3 and Figure 5 As shown in the figure, the connection position of the trailing edge 5 and the outer edge 4 is the lower part of the blade tip 11, and the trailing edge 5 extends radially from the hub 1 and presents an arc shape; among them, the lower part of the blade tail 8 of the adjacent blade 2, the trailing edge 5 of the adjacent blade 2, and the extension line of the lower part of the blade tip 11 of the adjacent blade 2 form an air outlet area 12 for the air flow to blow out.

[0042] Refer to Figure 6As shown, in implementation, the junction area between the trailing edge 5 and the outer edge 4 is defined as the lower part of the blade tip 11, and the trailing edge 5 is in an arc shape. The lower part of the blade tail 8 of the adjacent blade 2 in the airflow, the trailing edge 5 of the adjacent blade 2, and the extension line of the lower part of the blade tip 11 of the adjacent blade 2 form an air outlet area 12 from which the air is blown out.

[0043] Specifically, the upper part of the blade tip 9 bends and extends to protrude above the hub 1 so as to increase the pumping of the airflow by the upper part of the blade tip 9 during rotation.

[0044] Reference Figure 7-8 As shown, to increase the pumping volume of the airflow by the blade 2 during rotation, the upper part of the blade tip 9 can be further designed to bend and extend to protrude above the hub 1. Through this structural design, the upper part of the blade tip 9 increases the contact area with the airflow, can pump more airflow, and the bending structure guides the airflow, thereby increasing the air volume blown out by the fan blade.

[0045] Preferably, the hub 1 has a receiving portion 13 that is recessed inward. The hub 1 is designed to have the receiving portion 13, and a rotating shaft 14 is provided at the center line position of the hub 1. A magnetic ring 15 is provided on the inner side wall of the receiving portion 13.

[0046] Both the rotating shaft 14 and the magnetic ring 15 can be installed on the hub 1, saving the number of components and making the installation more convenient.

[0047] The above does not impose any limitation on the technical scope of the present utility model. Any modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An efficient axial flow fan blade structure, characterized in that, Comprising: a hub; blades, which are uniformly arranged on the outer peripheral surface of the hub; the blades have a leading edge, an outer edge, a trailing edge and an inner edge; wherein, the inner edge is spirally arranged on the outer peripheral surface of the hub, and the outer edge is arranged opposite to the inner edge; the leading edge is respectively connected to the inner edge and the outer edge; the trailing edge is respectively connected to the inner edge and the outer edge, and the trailing edge is arranged opposite to the leading edge; the connection position of the leading edge and the inner edge is the upper part of the blade tail; the connection position of the trailing edge and the inner edge is the lower part of the blade tail; the ratio of the distance between the upper parts of the blade tails of adjacent blades to the distance between the lower parts of the blade tails of adjacent blades is 0.7 - 1.

3.

2. The high-efficiency axial-flow fan blade structure according to claim 1, characterized in that: the ratio of the length of the inner edge to the length of the outer edge is 0.3 - 0.

8.

3. The high-efficiency axial-flow fan blade structure according to claim 1, characterized in that: the ratio of the length of the leading edge to the length of the trailing edge is 0.8 - 1.

2.

4. The high-efficiency axial-flow fan blade structure according to claim 1, characterized in that: the outer edge rotates around the central axis of the hub to form an equal-diameter profile from the air inlet direction to the air outlet direction.

5. The high-efficiency axial-flow fan blade structure according to claim 4, characterized in that: the connection position of the leading edge and the outer edge is the upper part of the blade tip; the leading edge extends radially from the hub and presents an arc shape; wherein, the extension lines of the upper parts of the blade tails of adjacent blades, the leading edges of adjacent blades and the upper parts of the blade tips of adjacent blades form an air inlet area for air to enter.

6. The high-efficiency axial-flow fan blade structure according to claim 5, characterized in that: the connection position of the trailing edge and the outer edge is the lower part of the blade tip, and the trailing edge extends radially from the hub and presents an arc shape; wherein, the extension lines of the lower parts of the blade tails of adjacent blades, the trailing edges of adjacent blades and the lower parts of the blade tips of adjacent blades form an air outlet area for air to blow out.

7. The high-efficiency axial-flow fan blade structure according to claim 6, characterized in that: the upper part of the blade tip bends and extends to protrude above the hub, so as to increase the pumping of the air flow by the upper part of the blade tip during rotation.

8. The high-efficiency axial-flow fan blade structure according to claim 7, characterized in that: the hub has a receiving portion that is recessed inward.

9. The high-efficiency axial-flow fan blade structure according to claim 8, characterized in that: the receiving portion is provided with a rotating shaft at the central axis position of the hub.

10. The high-efficiency axial-flow fan blade structure according to claim 9, characterized in that: a magnetic ring is provided on the inner side wall of the receiving portion.

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