A wind wheel structure and a fan

Abstract

The application relates to a fan wheel structure and a fan. The fan wheel structure comprises a wheel disc, a first cover plate and a plurality of blades. The wheel disc and the first cover plate are arranged at intervals in the axial direction of the first cover plate, the plurality of blades are arranged at intervals around the axis of the first cover plate, one end of each blade is connected to the wheel disc, the other end of each blade is connected to the first cover plate, and a ventilation opening is formed between the wheel disc, the first cover plate and two adjacent blades. The surface of the first cover plate between the two adjacent blades is a curved surface, the part of the curved surface with equal distances from the axis of the first cover plate is enclosed into an arc-shaped structure, the middle part of the arc-shaped structure protrudes in the direction away from the wheel disc, and the two end parts of the arc-shaped structure are connected to the two blades respectively. When the fluid is guided by the curved surface, the fluid flows out in the direction away from the wheel disc, the fluid outflow range is large, and the gas output by the fan wheel structure has a large air outlet range.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a wind turbine structure and a wind turbine. Background Technology

[0002] A blower is a machine that uses an electric motor to drive a rotor to increase gas pressure and expel gas. The rotor in the blower is connected to the rotor of the electric motor. The rotation of the motor rotor drives the rotor to rotate, which in turn drives the blades on the rotor to increase gas pressure and expel gas. In existing technology, the outlet range of the gas from the rotor is relatively small, affecting the gas outlet efficiency. Summary of the Invention

[0003] In view of this, the present invention aims to provide a wind turbine structure and a wind turbine to solve or partially solve the problem that the existing wind turbines have a small air outlet range, which affects the air outlet effect.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] In a first aspect, embodiments of the present invention provide a wind turbine structure comprising a rotor, a first cover plate, and a plurality of blades. Along the axial direction of the first cover plate, the rotor and the first cover plate are arranged at intervals, and the plurality of blades are arranged at intervals around the axis of the first cover plate. One end of each blade is connected to the rotor, and the other end of each blade is connected to the first cover plate. A ventilation opening is formed between the rotor, the first cover plate, and two adjacent blades. The surface of the first cover plate between two adjacent blades is curved, and portions of the curved surface equidistant from the axis of the first cover plate form an arc-shaped structure. The middle portion of the arc-shaped structure protrudes away from the rotor, and the two ends of the arc-shaped structure are respectively connected to two blades.

[0006] Optionally, the two ends of the arc-shaped structure are equidistant from the wheel.

[0007] Optionally, in the direction from the outer end of the first cover plate to the axis of the first cover plate, the curved surface located in the middle between two adjacent blades is a first curve extending away from the wheel disk.

[0008] Optionally, in the direction from the outer end of the first cover plate to the axis of the first cover plate, the connection between the first cover plate and the blade is a second curve extending away from the direction of the wheel.

[0009] Optionally, the first cover plate includes a first part and a second part, the first part being connected to the second part; the first part having an annular structure, the second part having an outwardly flared skirt-like structure, the first part being connected to the inner ring end of the second part, and the second part being connected to the blade.

[0010] Optionally, the wheel includes a hub and a second cover plate. The hub has a disc-shaped structure, and the second cover plate has an annular structure. The outer end of the hub is connected to the inner end of the second cover plate. One end of the blade is connected to both the hub and the first cover plate.

[0011] Optionally, the surface of the second cover plate located between two adjacent blades is a guide surface, which is a slope, and the guide surface is inclined away from the first cover plate in the direction of fluid flow within the vent.

[0012] Optionally, the hub has a frustum-shaped structure, with the small end of the hub close to the first cover plate, the sidewall of the hub connected to the blade, and the outer end of the large end of the hub connected to the second cover plate.

[0013] Optionally, the first cover plate, the second cover plate, and the blade are integrally formed.

[0014] Secondly, embodiments of the present invention also provide a fan, which includes a main body and the aforementioned impeller structure, wherein the main body is connected to the impeller structure.

[0015] This invention discloses a wind turbine structure in which a vent is formed between a rotor, a first cover plate, and two adjacent blades. The surface of the first cover plate between the two adjacent blades is curved, and this curved surface is used for fluid guidance. Since the portions of the curved surface equidistant from the axis of the first cover plate form an arc-shaped structure, the middle of the arc-shaped structure protrudes away from the rotor, and the two ends of the arc-shaped structure are respectively connected to the two blades, the fluid, guided by the curved surface, flows out at an angle away from the rotor, resulting in a larger outflow range. That is, the curved surface in the wind turbine structure of this embodiment can expand the outflow range of the fluid flowing from the wind turbine structure; when the fluid is wind, the gas output by the wind turbine structure has a large air outlet range.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a structural schematic diagram of the wind turbine structure from a first perspective according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the front view of the wind turbine structure;

[0020] Figure 3 This is a structural schematic diagram of the wind turbine structure from a second perspective according to an embodiment of the present invention;

[0021] Figure 4 This is a structural schematic diagram of the wind turbine structure from a fourth perspective according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the main view of the wind turbine structure according to an embodiment of the present invention;

[0023] Figure 6 for Figure 5 Structural schematic diagram of the E-E sectional view;

[0024] Figure 7 for Figure 5 A structural schematic diagram of the F-F sectional view.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10 - Hub; 11 - Aluminum shaft core; 12 - Buffer rubber; 13 - Iron ring; 20 - Second cover plate; 21 - Guide surface; 30 - First cover plate; 31 - Curved surface; 32 - First section; 34 - Spiral; 35 - First part; 36 - Second part; 40 - Blade; 50 - Vent; 60 - Disc. Detailed Implementation

[0027] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0028] This application provides a wind turbine structure suitable for use in wind turbines. (Refer to...) Figure 1 It shows a three-dimensional structural diagram of the wind turbine structure. Further reference... Figure 2As shown, the wind turbine structure includes a rotor 60, a first cover plate 30, and multiple blades 40. Along the axial direction of the first cover plate 30, the rotor 60 and the first cover plate 30 are arranged at intervals. Multiple blades 40 are arranged at intervals around the axis of the first cover plate 30. One end of each blade 40 is connected to the rotor 60, and the other end of each blade 40 is connected to the first cover plate 30. A ventilation opening 50 is formed between the rotor 60, the first cover plate 30, and two adjacent blades 40. Further refer to... Figure 4 As shown, the surface of the first cover plate 30 between two adjacent blades 40 is a curved surface 31. The portions of the curved surface 31 that are equidistant from the axis of the first cover plate 30 form an arc-shaped structure. The middle part of the arc-shaped structure protrudes away from the wheel 60, and the two ends of the arc-shaped structure are connected to the two blades 40 respectively.

[0029] The wheel 60 is fixedly connected to the rotor of the electric motor and is also connected to the blades 40. When the electric motor rotates, the rotor of the electric motor rotates, which causes the hub 10 to rotate. The hub 10 drives the blades 40 to rotate synchronously, thereby increasing the gas pressure and discharging the gas. The axis of the wheel 60 coincides with the axis of the first cover plate 30.

[0030] Blade 40 is an important component of the wind turbine structure. The rotation of blade 40 achieves the purpose of increasing gas pressure and discharging gas, etc. (Refer to...) Figure 1 As shown. Multiple blades 40 are evenly distributed around the axis of the first cover plate 30, perpendicular to the axis of the first cover plate 30, as shown in the reference diagram. Figure 5 As shown, the ends of multiple blades 40 near the axis of the first cover plate 30 form a circular structure. The specific shape of the blades 40 can be selected according to usage requirements; for example, the blades 40 can be at least one of the following: flat blade 40, curved narrow blade 40, curved blade 40, airfoil blade 40, and flat curved rearward blade 40. (Refer to...) Figure 1 As shown, the blade 40 depicted is a flat-plate curved rearward blade 40. Further reference... Figure 5 As shown, the surface 31 has a spiral structure, and from the inner end to the outer end of the surface 31, the surface 31 forms multiple arc-shaped structures.

[0031] An air inlet is provided in the middle of the first cover plate 30, which is used for the inflow of fluid. (Refer to...) Figure 1 As shown, multiple blades 40 are located between the wheel disk 60 and the first cover plate 30. The upper end of each blade 40 is connected to the first cover plate 30, and the lower end of each blade 40 is connected to the wheel disk 60. Two adjacent blades 40, along with the wheel disk 60 and the first cover plate 30 located between them, form a ventilation opening 50. Further reference... Figure 3As shown, fluid flows in from the air inlet and out through the vent 50. At this time, two adjacent blades 40, as well as the disc 60 and the first cover plate 30 located between the two adjacent blades 40, all serve to guide the fluid flow. The direction of fluid flow out of the vent 50 is shown in the figure. Figure 4 In the direction of B.

[0032] In the wind turbine structure of this embodiment, a vent 50 is formed between the turbine disk 60, the first cover plate 30, and two adjacent blades 40. The surface of the first cover plate 30 between the two adjacent blades 40 is a curved surface 31, which is used for fluid guidance. Since the portions of the curved surface 31 equidistant from the axis of the first cover plate 30 form an arc-shaped structure, the middle of the arc-shaped structure protrudes away from the turbine disk 60, and the two ends of the arc-shaped structure are respectively connected to the two blades 40, the fluid, when guided by the curved surface 31, flows out at an angle away from the turbine disk 60, resulting in a larger outflow range. That is, the curved surface 31 in the wind turbine structure of this embodiment can expand the outflow range of the fluid flowing from the wind turbine structure; when the fluid is wind, the gas output by the wind turbine structure has a larger outlet range.

[0033] It is understood that the wind turbine structure can be applied to a variety of fluids. The embodiments of this application do not impose specific limitations on the fluid. For example, the fluid can be a gas, or it can be a liquid.

[0034] Optionally, the two ends of the arc-shaped structure are equidistant from the wheel 60.

[0035] Furthermore, a projection plane is made perpendicular to the axis of the first cover plate 30. The projection of the first cover plate 30 onto this plane is a circular structure, with the outer end of the first cover plate 30 being circular. The surface of the first cover plate 30 between two adjacent blades 40 is a curved surface 31. The portions of the curved surface 31 equidistant from the axis of the first cover plate 30 form an arc-shaped structure. From the inner end to the outer end of the curved surface 31, multiple arc-shaped structures are formed. (Refer to...) Figure 2 As shown, the outermost end of the first cover plate 30 is the outermost arc-shaped structure of the curved surface 31. In the outermost end of the first cover plate 30, the two ends of any arc-shaped structure are equidistant from the wheel 60.

[0036] Optional, refer to Figure 2 As shown, the wind turbine structure includes multiple blades 40, which divide the first cover plate 30 into multiple curved surfaces. The portions of the multiple curved surfaces 31 that are equidistant from the axis of the first cover plate 30 form a wave-like structure. In the wave-like structure, all wave crests are equidistant from the wheel disk 60, and all wave troughs are equidistant from the wheel disk 60. The wave crests are located in the middle of the curved surface 31 between two adjacent blades 40, and the wave troughs are the connection points between the first cover plate 30 and the blades 40.

[0037] Optional, refer to Figure 5 and Figure 6 As shown, in the direction from the outer end of the first cover plate 30 to the axis of the first cover plate 30, the curved surface 31 is located in the middle between two adjacent blades 40 and is a first curve extending away from the wheel disk 60.

[0038] Further reference Figure 5 As shown, the line at the midpoint between two adjacent blades 40 on the curved surface 31 is... Figure 5 The upper half of E-E in the middle, with Figure 5 The cross-sectional view made by E-E in the middle is referenced Figure 6 As shown, a first profile 32 is formed on the first cover plate 30. In the direction away from the wheel 60, the first profile 32 is a first curve extending in the direction away from the wheel 60.

[0039] In this embodiment, the curved surface 31 is located in the middle between two adjacent blades 40 and is a first curve extending away from the wheel 60. When the fluid is guided by the curved surface 31, the first curve makes the fluid flow more smoothly.

[0040] Among them, reference Figure 2 As shown, the direction 60 degrees away from the roulette wheel is... Figure 2 In the C direction.

[0041] Optional, refer to Figure 5 and Figure 7 As shown, when a cross-section is taken through the axis of the first cover plate 30, the slope of the inner surface of the first cover plate 30 extending away from the wheel 60 is greater than the slope of the inner surface of the first cross-section 32 extending away from the wheel 60.

[0042] Optional, refer to Figure 5 and Figure 6 As shown, in the direction from the outer end of the first cover plate 30 to the axis of the first cover plate 30, the connection between the first cover plate 30 and the blade 40 is a second curve extending away from the wheel disk 60. At this time, the connection between the first cover plate 30 and the blade 40 can achieve smoother fluid flow.

[0043] Further reference Figure 4 As shown, a spiral 34 is formed at the connection between the first cover plate 30 and the blade 40. In the direction of fluid flow within the vent 50, i.e., in direction B, the spiral 34 extends outward in a spiral and moves toward the wheel 60.

[0044] Optional, refer to Figure 3As shown, the first cover plate 30 includes a first part 35 and a second part 36. The first part 35 is connected to the second part 36, and the first part 35 is located in the inner ring of the second part 36. The first part 35 has a circular structure, and the second part 36 has an outwardly flared skirt structure. The inner ring ends of the first part 35 and the second part 36 are connected, and the second part 36 is connected to the blade 40.

[0045] Further reference Figure 3 As shown, the upper end of the first cover plate 30 is the first part 35, which has a ring-shaped structure. An air inlet is provided in the middle of the ring-shaped structure, and the air inlet is used for the inflow of fluid.

[0046] The lower end of the first cover plate 30 is the second part 36, which has an outwardly flared skirt-like structure. The first part 35 is connected to the inner end of the second part 36, and the second part 36 is connected to the blade 40.

[0047] Optional, refer to Figure 4 As shown, the wheel 60 includes a hub 10 and a second cover plate 20. The hub 10 has a disc-shaped structure, and the second cover plate 20 has an annular structure. The outer end of the hub 10 is connected to the inner end of the second cover plate 20. One end of the blade 40 is connected to both the hub 10 and the first cover plate 30.

[0048] Furthermore, the second cover plate 20 has an annular structure with a mounting hole in its center. The hub 10 is disposed within the mounting hole, and the outer end of the hub 10 is connected to the inner end of the second cover plate 20. After the second cover plate 20 and the hub 10 are connected, they form a smooth surface facing the first cover plate 30. This smooth surface is used to connect with the blades 40 and also serves as a guide for airflow. The hub 10 is fixedly connected to the rotor of the motor and is also connected to the blades 40. When the motor rotates, the rotor rotates, causing the hub 10 to rotate. The hub 10 and the second cover plate 20 together drive the blades 40 to rotate synchronously. The rotation of the blades 40 increases the gas pressure and discharges the gas.

[0049] Furthermore, the second cover plate 20 is made of sheet material, and the thickness of the second cover plate 20 is relatively uniform.

[0050] Optionally, the hub 10 is an integral injection-molded structural component with the second cover plate 20.

[0051] Optional, refer to Figure 3 and Figure 6 As shown, the surface of the second cover plate 20 located between two adjacent blades 40 is a guide surface 21. The guide surface 21 is a slope, and in the direction of fluid flow in the vent 50, the guide surface 21 is inclined away from the first cover plate 30.

[0052] In the wind turbine structure of this embodiment, when the fluid flows out from the vent 50, it is guided by the guide surface 21, and the fluid flows out at an angle away from the first cover plate 30, resulting in a large outflow range. That is, the guide surface 21 in the wind turbine structure of this embodiment can expand the outflow range of the fluid flowing out of the wind turbine structure; when the fluid is wind, the gas output by the wind turbine structure has a large air outlet range.

[0053] Optional, refer to Figure 5 and Figure 7 As shown, the hub 10 has a frustum-shaped structure. The small end of the hub 10 is close to the first cover plate 30. The side wall of the hub 10 is connected to the blade 40. The outer end of the large end of the hub 10 is connected to the second cover plate 20.

[0054] Reference Figure 7 As shown, after the outer end of the hub 10 is connected to the inner end of the second cover plate 20, a smooth surface facing the first cover plate 30 is formed. This smooth surface is used to connect to one end of the blade 40 and also serves as a guide for airflow.

[0055] A connecting structure is provided in the middle of the hub 10 for connecting to the rotor of the electric motor. The specific connecting structure can be customized according to usage requirements; for example, the connecting structure may be a flange. The flange connects to the middle of the hub 10 and is also fixed to the rotor using bolts or other fasteners, thus achieving the connection between the hub 10 and the motor rotor.

[0056] Optionally, in one specific embodiment, refer to Figure 5 and Figure 7 As shown, the hub 10 includes an aluminum shaft core 11, a buffer rubber 12, and an iron ring 13. The aluminum shaft core 11 is located on the inner ring of the hub 10 and is connected to the rotor of the motor. The buffer rubber 12 connects the aluminum shaft core 11 and the iron ring 13 to provide a buffering effect and reduce the impact of motor vibration on the wind turbine structure's airflow. The outer end of the iron ring 13 is connected to the inner end of the second cover plate 20.

[0057] Optionally, the first cover plate 30, the second cover plate 20, and the blade 40 are integrally formed parts. When the second cover plate 20, the first cover plate 30, and the blade 40 are integrally formed parts, the second cover plate 20, the first cover plate 30, and the blade 40 have strong structural strength and meet the strength requirements of the wind turbine structure.

[0058] It is understandable that the materials of the second cover plate 20, the first cover plate 30, and the blade 40 can be selected according to the usage requirements. For example, the second cover plate 20, the first cover plate 30, and the blade 40 can be made of plastic; or the second cover plate 20, the first cover plate 30, and the blade 40 can be made of metal.

[0059] In one specific embodiment, reference is made to Figure 1 As shown, the wind turbine structure includes a hub 10, a second cover plate 20, a first cover plate 30, and multiple blades 40. The hub 10 has a frustum-shaped structure, and the second cover plate 20 has an annular structure. The smaller end of the hub 10 is close to the first cover plate 30, and the outer end of the hub 10 is connected to the inner end of the second cover plate 20. The blades 40 are located between the hub 10 and the second cover plate 20 and the first cover plate 30, and the blades 40 are connected to the hub 10, the second cover plate 20, and the first cover plate 30.

[0060] The surface of the first cover plate 30 between two adjacent blades 40 forms a curved surface 31. The curved surface 31 has a helical structure, and the portions of the curved surface 31 that are equidistant from the axis of the first cover plate 30 form an arc-shaped structure. The middle part of the arc-shaped structure protrudes away from the wheel 60, and the two ends of the arc-shaped structure are connected to the two blades 40 respectively. The surface of the second cover plate 20 between two adjacent blades 40 is a guide surface 21. The guide surface 21 is a slope, and in the direction of fluid flow within the vent 50, the guide surface 21 is inclined away from the first cover plate 30. The two adjacent blades 40, as well as the curved surface 31 and the guide surface 21 between the two adjacent blades 40, are used to guide the fluid.

[0061] In use, the wind turbine structure of this embodiment utilizes both the guide surface 21 and the curved surface 31 for fluid guidance. When the fluid flows out of the vent 50, it is guided by the guide surface 21 and the curved surface 31. When guided by the guide surface 21, the fluid flows out at an angle away from the first cover plate 30; when guided by the curved surface 31, the fluid flows out at an angle away from the second cover plate 20. The fluid's outflow range expands after being guided by the guide surface 21 and the curved surface 31, resulting in a larger air outlet range for the wind turbine structure.

[0062] This application embodiment also provides a fan, which includes a main body and the aforementioned impeller structure, with the main body and impeller structure connected together.

[0063] In the fan of this embodiment, a ventilation opening 50 is formed between the impeller 60, the first cover plate 30, and two adjacent blades 40. The surface of the first cover plate 30 between the two adjacent blades 40 is a curved surface 31. The portions of the curved surface 31 that are equidistant from the axis of the first cover plate 30 form an arc-shaped structure. The middle part of the arc-shaped structure protrudes away from the impeller 60, and the two ends of the arc-shaped structure are respectively connected to the two blades 40. When the fluid is guided by the curved surface 31, it flows out at an angle away from the impeller 60, and the outflow range of the fluid is relatively large. That is, the curved surface 31 in the fan of this embodiment can expand the outflow range of the fluid flowing out of the fan; when the fluid is wind, the gas output by the fan has a large air outlet range.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. For embodiments of devices, electronic devices, computer-readable storage media, and computer program products containing instructions, the descriptions are relatively simple because they are basically similar to the method embodiments; relevant parts can be referred to the descriptions of the method embodiments.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A wind turbine structure, characterized in that, The wind turbine structure includes a wheel disk (60), a first cover plate (30), and multiple blades (40); the wheel disk (60) and the first cover plate (30) are arranged at intervals along the axial direction of the first cover plate (30), and multiple blades (40) are arranged at intervals around the axis of the first cover plate (30). One end of each blade (40) is connected to the wheel disk (60), and the other end of each blade (40) is connected to the first cover plate (30). A ventilation opening (50) is formed between the wheel disk (60), the first cover plate (30), and two adjacent blades (40). The surface of the first cover plate (30) between two adjacent blades (40) is a curved surface (31). The portion of the curved surface (31) that is equidistant from the axis of the first cover plate (30) forms an arc-shaped structure. The middle part of the arc-shaped structure protrudes away from the wheel disk (60). The two ends of the arc-shaped structure are respectively connected to the two blades (40).

2. The wind turbine structure according to claim 1, characterized in that, The two ends of the arc-shaped structure are equidistant from the wheel (60).

3. The wind turbine structure according to claim 1, characterized in that, In the direction from the outer end of the first cover plate (30) to the axis of the first cover plate (30), the curved surface (31) is located in the middle between two adjacent blades (40) and is a first curve extending away from the wheel disk (60).

4. The wind turbine structure according to claim 1, characterized in that, In the direction from the outer end of the first cover plate (30) to the axis of the first cover plate (30), the connection between the first cover plate (30) and the blade (40) is a second curve extending away from the wheel disk (60).

5. The wind turbine structure according to claim 1, characterized in that, The first cover plate (30) includes a first part (35) and a second part (36), the first part (35) and the second part (36) are connected; the first part (35) has a ring-shaped structure, the second part (36) has an outwardly flared skirt-shaped structure, the first part (35) and the inner ring end of the second part (36) are connected, and the second part (36) is connected to the blade (40).

6. The wind turbine structure according to claim 1, characterized in that, The wheel (60) includes a hub (10) and a second cover plate (20). The hub (10) has a disc-shaped structure, and the second cover plate (20) has an annular structure. The outer end of the hub (10) is connected to the inner end of the second cover plate (20). One end of the blade (40) is connected to both the hub (10) and the first cover plate (30).

7. The wind turbine structure according to claim 6, characterized in that, The surface of the second cover plate (20) between two adjacent blades (40) is a guide surface (21). The guide surface (21) is a slope. In the direction of fluid flow in the vent (50), the guide surface (21) is inclined away from the first cover plate (30).

8. The wind turbine structure according to claim 6, characterized in that, The hub (10) has a frustum-shaped structure. The small end of the hub (10) is close to the first cover plate (30). The side wall of the hub (10) is connected to the blade (40). The outer ring end of the large end of the hub (10) is connected to the second cover plate (20).

9. The wind turbine structure according to claim 6, characterized in that, The first cover plate (30), the second cover plate (20) and the blade (40) are integrally formed parts.

10. A fan, characterized in that, It includes a main body of equipment and a wind turbine structure as described in any one of claims 1 to 9, wherein the main body of equipment is connected to the wind turbine structure.

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