An airfoil array type superstructure airflow concentrating device and a wind power generation apparatus

Abstract

The application discloses a wing profile array type superstructure airflow concentration device and a wind power generation equipment, belongs to the technical field of wind power generation, and solves at least one problem of instability of energy conversion efficiency, incapability of wind power generator to be applied to a weak wind area, and large size of fan blades in the prior art. The device comprises a plurality of wing profiles, the plurality of wing profiles are arranged in a ring-shaped symmetrical array, the angle of each wing profile is adjustable, and the distance between two adjacent wing profiles is adjustable. The wing profile array type superstructure airflow concentration device and the wind power generation equipment can be used for wind power generation.

Description

Technical Field

[0001] This invention belongs to the field of wind energy utilization and wind power generation technology, and particularly relates to an airfoil array superstructure airflow concentrator and wind power generation equipment. Background Technology

[0002] In the global context of "carbon neutrality," the demand for green and renewable energy technologies is growing. Wind energy, as a natural renewable energy source, boasts advantages such as abundant energy, wide distribution, and lower carbon emissions compared to thermal power generation. Wind power generation primarily utilizes the kinetic energy of airflow, which is then converted into electricity by wind turbines. When the wind blows the turbine, the wind force drives the blades to rotate around their axis, converting wind energy into mechanical energy. The amount of wind energy converted is directly proportional to air density, the area swept by the turbine, and the cube of the wind speed; therefore, the higher the wind speed, the higher the wind energy density. However, the wind speed decreases as it passes over the turbine, which limits the energy that a wind turbine can extract.

[0003] In the current development of technology, wind turbines inevitably have several limitations and drawbacks. First, wind speed is unstable, resulting in unstable energy output, which affects energy conversion efficiency. Second, the machines themselves have starting wind speed requirements, which limits the application scenarios of wind energy; certain machines cannot be used in areas with weak winds. To improve wind energy utilization efficiency, the blades of wind turbines on the market are usually very large, resulting in high starting wind speeds and difficulties in using them in confined urban spaces. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide an airfoil array superstructure airflow concentration device and a wind power generation equipment, which solves at least one of the following problems in the prior art: unstable energy conversion efficiency, wind turbines requiring a starting wind speed that cannot be applied to weak wind areas, and large wind turbine blade size.

[0005] The objective of this invention is mainly achieved through the following technical solutions: The present invention provides an airfoil array type superstructure airflow concentrating device, comprising multiple airfoil elements arranged in a ring-shaped symmetrical array, wherein the angle of each airfoil element is adjustable, and the distance between two adjacent airfoil elements is adjustable.

[0006] Furthermore, multiple airfoil components are distributed divergently from the center of the ring to the edge.

[0007] Furthermore, in the circumferential direction of the annular symmetrical array, multiple airfoils are arranged in multiple columns, and the distance between two adjacent columns of airfoils gradually increases from the center of the annulus to the edge.

[0008] Furthermore, in the radial direction of the annular symmetrical array, multiple airfoils are arranged in multiple rings, and the distance between two adjacent airfoils in each ring gradually increases from the center of the ring to the edge.

[0009] Furthermore, the spacing between two adjacent airfoil rings is 10~15mm.

[0010] Furthermore, it also includes a top plate connected to the upper end of the airfoil and / or a bottom plate connected to the lower end of the airfoil.

[0011] Furthermore, the area in the center of the annular symmetrical array without airfoil components is defined as the central region, and the ratio of the diameter of the central region, the overall diameter of the annular symmetrical array, and the diameter of the base plate is 1:4~5:5~7.

[0012] Furthermore, the ratio of the height of the base plate to the overall height of the airfoil array-type superstructure airflow concentrator is 1:3 to 6.

[0013] Furthermore, the length of the airfoil is 30~50mm.

[0014] Furthermore, the airfoil, top plate, and / or bottom plate are made of photosensitive resin with a characteristic density of 1110 kg / m³. 3 Young's modulus is 2611 MPa.

[0015] Furthermore, the aforementioned airfoil array-type superstructure airflow concentrator was obtained through 3D printing. Furthermore, the lower end of the airfoil is provided with a protrusion, and a groove is opened on the base plate, into which the protrusion is inserted.

[0016] Furthermore, the shape of the protrusion is wedge-shaped.

[0017] Furthermore, the airfoil is slidably and fixedly connected to the base plate via a connector.

[0018] Furthermore, an annular mesh groove is formed on the base plate, and a limiting member is provided on the side wall of the mesh groove. The connecting member includes a connecting protrusion, a boss, a spring, and a ball. One end of the connecting protrusion is fixedly connected to the airfoil, and the other end of the connecting protrusion is located in the mesh hole and is detachably fixedly connected to one end of the boss. The boss is located in the mesh hole and the side of the boss facing the connecting protrusion contacts the limiting member. One end of the spring abuts against the other end of the boss and is connected. The other end of the spring is sleeved on the outer wall of the ball. The spring is always in a compressed state, so that the boss abuts against the limiting member, and the ball can roll on the bottom of the mesh groove.

[0019] Furthermore, both the side of the limiting member facing the boss and the side of the boss facing the limiting member are rough surfaces.

[0020] Furthermore, the side of the limiting member facing the boss has multiple closely arranged limiting particles, and there is a limiting gap between two adjacent limiting particles. The side of the boss facing the limiting member has multiple closely arranged boss particles, and there is a boss gap between two adjacent boss particles. The boss particles are inserted into the limiting gaps.

[0021] The present invention also provides a wind power generation device, including the above-mentioned airfoil array type superstructure airflow concentrator.

[0022] Furthermore, the aforementioned wind power generation equipment also includes a wind turbine, which is located at the center of a ring-shaped symmetrical array and uses an airfoil array-type superstructure airflow concentrator to increase the wind speed entering the wind turbine.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: A) The airfoil array superstructure airflow concentrator provided by this invention uses airfoil components as structural units, leveraging their special position in fluid mechanics, particularly aerodynamics. While seemingly simple in shape, airfoils contain complex aerodynamic phenomena such as laminar flow, turbulence, transition, shock waves, separation, and vortices, as well as complex flow mechanisms that decisively influence aerodynamic characteristics. It can concentrate and utilize the energy of natural wind. When natural wind in the environment is accelerated by the airfoil array superstructure airflow concentrator, the wind speed increases several times. The wind power is proportional to the cube of the wind speed, enabling omnidirectional wind gathering and acceleration, improving wind energy density and utilization at low wind speeds, achieving omnidirectional wind gathering in space, and overcoming problems such as unstable energy conversion efficiency, the requirement of wind turbines to start at high wind speeds making them unsuitable for weak wind areas, and the large size of wind turbine blades.

[0024] B) The airfoil array superstructure airflow concentrator provided by the present invention has an adjustable angle (the angle between each airfoil and the horizontal and vertical directions) and an adjustable distance between two adjacent airfoils. By adjusting these two parameters, the airfoil array superstructure airflow concentrator can be effectively improved and can be adjusted as a whole according to the wind volume, wind direction and wind speed in the actual application environment, so that it can be applied to various environments and conditions.

[0025] C) The airfoil array-type superstructure airflow concentrating device provided by this invention allows for adjustment of the distance between two adjacent airfoil components. By pressing the airfoil component from its upper end, the connecting protrusion moves downward, changing the contact between the protrusion and the limiting member from abutment to a gap. At this point, pushing the airfoil component allows the ball bearings to roll at the bottom of the mesh groove, thereby adjusting the relative positional relationship between the airfoil components. Furthermore, rotating the airfoil component causes the ball bearings to rotate accordingly, enabling multi-angle adjustment of the airfoil component.

[0026] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Attached image description: Figure 1 A top-view two-dimensional diagram of the annular symmetrical array in the airfoil array-type superstructure airflow concentrator provided by the present invention; Figure 2 This is a three-dimensional structural diagram of the annular symmetrical array in the airfoil array-type superstructure airflow concentrator provided by the present invention. Figure 3 A schematic diagram of the airfoil array-type superstructure airflow concentrator provided for this discovery; Figure 4 A schematic diagram of the connecting component in the airfoil array-type superstructure airflow concentrator provided by the present invention; Figure 5 This is a schematic diagram of the mesh structure in the airfoil array superstructure airflow concentrator provided by the present invention.

[0029] Figure label: 1-Airfoil; 2-Base plate; 3-Limiting component; 4-Connecting protrusion; 5-Boss; 6-Spring; 7-Ball; 8-Mesh hole. Detailed Implementation

[0030] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0031] This invention provides an airfoil array-type superstructure airflow concentrator, see [link / reference]. Figures 1 to 5 It includes multiple airfoil components 1, which are arranged in a circular symmetrical array. The angle of each airfoil component 1 (the angle between it and the horizontal and vertical directions) is adjustable, and the distance between two adjacent airfoil components 1 is adjustable.

[0032] It should be noted that the longitudinal section of airfoil 1 is similar in shape to the longitudinal section of the wing, hence the name airfoil 1. For example, airfoil 1 can be a NACA0012 airfoil component, which is one of the most widely used airfoil structures and has been widely and maturely applied in aerodynamics.

[0033] Compared with existing technologies, the airfoil array superstructure airflow concentrator provided by this invention uses airfoil component 1 as a structural unit, leveraging its special position in fluid mechanics, especially in aerodynamics. While the airfoil appears simple in shape, it contains complex aerodynamic phenomena such as laminar flow, turbulence, transition, shock waves, separation, and vortices, as well as complex flow mechanisms that decisively influence aerodynamic characteristics. It can concentrate and utilize the energy of natural wind. When natural wind in the environment is accelerated by the airfoil array superstructure airflow concentrator, the wind speed increases several times. The wind power is proportional to the cube of the wind speed, enabling omnidirectional wind gathering and acceleration, improving wind energy density and utilization rate at low wind speeds, achieving omnidirectional wind gathering in space, and overcoming problems such as unstable energy conversion efficiency, wind turbines requiring high starting wind speeds for application in weak wind areas, and large wind turbine blade sizes.

[0034] Furthermore, since the angle (the angle between each airfoil 1 and the horizontal and vertical directions) of each airfoil 1 in the airfoil array superstructure airflow concentrating device provided by the present invention is adjustable, and the distance between two adjacent airfoil 1 is adjustable, by adjusting these two parameters, the airfoil array superstructure airflow concentrating device can be effectively improved, and can be adjusted as a whole according to the wind volume, wind direction and wind speed in the actual application environment, so that it can be applied to various environments and situations.

[0035] The arrangement of a circular symmetrical array is as follows: Multiple airfoil elements 1 are distributed divergently from the center to the edge of the annular array. Circumferentially, the airfoil elements 1 are arranged in multiple rows, with the distance between adjacent rows gradually increasing from the center to the edge. Radially, the airfoil elements 1 are arranged in multiple rings, with the distance between adjacent rings gradually increasing from the center to the edge. It should be noted that the gaps between adjacent rows and rings of airfoil elements 1 can serve as channels for airflow, enabling multi-channel air concentration in the airfoil array-type superstructure airflow concentrator.

[0036] It is understandable that, in order to form an integral structure, the aforementioned airfoil array superstructure airflow concentrator also includes a top plate connected to the upper end of the airfoil 1 and / or a bottom plate 2 connected to the lower end of the airfoil 1. Through the setting of the top plate and / or bottom plate 2, multiple airfoil 1s can be connected into a whole, which facilitates the overall transportation and use of the airfoil array superstructure airflow concentrator.

[0037] In practical applications, in order to further improve the overall wind gathering performance of the aforementioned airfoil array superstructure airflow concentrator, the specific dimensional parameters of the airfoil array superstructure airflow concentrator are as follows: The length of airfoil 1 is 30~50mm (e.g., 30mm, 35mm, 38mm, 41mm, 45mm, 48mm or 50mm).

[0038] The spacing between two adjacent airfoil elements 1 is 10~15mm (e.g., 10mm, 12mm, 13mm or 15mm).

[0039] The central region is defined as the area at the center of the annular symmetrical array where no airfoil 1 is located. The ratio of the diameter of the central region, the overall diameter of the annular symmetrical array, and the diameter of the base plate 2 is 1:4~5:5~7. Specifically, the diameter of the central region is 100~150mm (e.g., 100mm, 110mm, 120mm, 128mm, 135mm, 140mm, or 150mm), the overall diameter of the annular symmetrical array is 500~550mm (e.g., 500mm, 511.2mm, 540mm, or 550mm), and the diameter of the base plate 2 is 550~700mm (e.g., 550mm, 580mm, 600mm, 610mm, 640mm, or 700mm).

[0040] The ratio of the height of the base plate 2 to the overall height of the airfoil array superstructure airflow concentrator is 1:3 to 6. Specifically, the height of the base plate 2 is 25 to 32 mm (e.g., 25 mm, 27 mm, 30 mm, 32 mm), and the overall height of the airfoil array superstructure airflow concentrator is 100 to 130 mm (e.g., 100 mm, 115 mm, 118 mm, 125 mm, or 130 mm).

[0041] To ensure the overall structural strength of the airfoil array-type superstructure airflow concentrator, the airfoil component 1, the top plate, and / or the bottom plate 2 can be made of photosensitive resin with a characteristic density of 1110 kg / m³. 3 Young's modulus is 2611 MPa.

[0042] For example, the aforementioned airfoil array-type superstructure airflow concentrator can be obtained by 3D printing. The proposed structure is simple, the principle is novel, the raw materials are readily available, the manufacturing process is mature, and the implementation is highly feasible.

[0043] To achieve the connection between airfoil 1 and base plate 2, the following two methods can be used: In one embodiment, the lower end of the airfoil 1 is provided with a protrusion, and a groove is provided on the base plate 2. The protrusion is inserted into the groove, thereby enabling the connection between the two. For example, the shape of the protrusion is wedge-shaped.

[0044] In another configuration, the airfoil 1 is slidably and fixedly connected to the base plate 2 via a connector. The base plate 2 has an annular mesh groove, and the sidewalls of the mesh groove are provided with limiting elements 3 (e.g., limiting plates or limiting protrusions). See [reference needed]. Figure 4 Specifically, the connecting component includes a connecting protrusion 4, a boss 5, a spring 6, and a ball bearing 7. One end of the connecting protrusion 4 is fixedly connected to the airfoil 1, and the other end of the connecting protrusion 4 is located in the mesh hole 8 and is detachably fixedly connected to one end of the boss 5. The boss 5 is located in the mesh hole 8, and the side of the boss 5 facing the connecting protrusion 4 contacts the limiting member 3. One end of the spring 6 abuts against the other end of the boss 5, and the other end of the spring 6 is sleeved on the outer wall of the ball bearing 7. The spring 6 is always in a compressed state, so that the boss 5 abuts against the limiting member 3, and the ball bearing 7 can roll at the bottom of the mesh groove. Thus, when it is necessary to adjust the distance between two adjacent airfoils 1, the airfoil 1 can be pressed from the upper end of the airfoil 1, causing the connecting protrusion 4 to move downward, and the distance between the boss 5 and the limiting member 3 changes from abutting to a gap. At this time, pushing the airfoil 1 allows the ball bearing 7 to roll at the bottom of the mesh groove, thereby adjusting the relative positional relationship between the airfoils 1. Furthermore, by rotating the airfoil 1, the ball bearing 7 can rotate accordingly, thereby enabling multi-angle adjustment of the airfoil 1.

[0045] In practical applications, the airfoil 1 may rotate if the airfoil comes into contact with the bottom of the mesh groove by rolling. Therefore, the following method can be used to improve the contact stability between the limiting member 3 and the boss 5: the side of the limiting member 3 facing the boss 5 and the side of the boss 5 facing the limiting member 3 are both rough surfaces. That is, the side of the limiting member 3 facing the boss 5 is provided with multiple closely arranged limiting particles, and there is a limiting gap between two adjacent limiting particles. The side of the boss 5 facing the limiting member 3 is provided with multiple closely arranged boss particles, and there is a boss gap between two adjacent boss particles. The boss particles are inserted into the limiting gaps.

[0046] The present invention provides a wind power generation device, including the airfoil array superstructure airflow concentrator provided above.

[0047] Compared with the prior art, the beneficial effects of the wind power generation equipment provided by the present invention are basically the same as those of the airfoil array superstructure airflow concentration device provided above, and will not be described in detail here.

[0048] It is understandable that the aforementioned wind power generation equipment also includes wind turbines, which are located at the center of a ring-shaped symmetrical array and use an airfoil array-type superstructure airflow concentrator to increase the wind speed entering the wind turbine.

[0049] Example 1 In this embodiment, the airfoil array superstructure airflow concentrator specifically uses NACA0012 type airfoil units, with 70 airfoil units arranged in 20 columns and 4 rings. The number of units in each layer is 10, 20, 20 and 20 in a uniform ring symmetrical array from the inside to the outside. The length of a single airfoil is 40mm, the spacing between each airfoil ring is 12mm, the diameter of the central area is 120mm, the overall diameter of the airfoil array superstructure airflow concentrator is 511.20mm, the overall height of the airfoil array superstructure airflow concentrator is 120mm, the diameter of the base plate is 600mm, and the height of the base plate is 30mm.

[0050] Photosensitive resin: Its characteristic density is 1110 kg / m³ 3 Young's modulus is 2611 MPa.

[0051] Air: Its characteristic density is 1.169 kg / m³ 3 The dynamic viscosity is 18.446 Pa·s.

[0052] The velocity and pressure fields of the superstructure under a certain wind speed were analyzed using the finite element method. When natural wind comes from a certain direction, the wind speed will concentrate in the central region, such as... Figure 2 The area shown by the dashed line indicates where a power generation device can be added to generate wind power. When the incident wind speed is set to 2 m / s, the wind speed in the central area can be increased to over 7 m / s, and the wind energy density is expected to increase by more than 42 times, resulting in a significant increase in the energy available for wind power generation.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An airfoil array-type superstructure airflow concentrator, characterized in that, It includes multiple airfoil components, which are arranged in a circular symmetrical array. The angle of each airfoil component is adjustable, and the distance between two adjacent airfoil components is adjustable. From the center of the ring to the edge, multiple airfoils are distributed in a divergent manner; in the circumferential direction of the ring symmetrical array, multiple airfoils are arranged in multiple rows, and the distance between two adjacent rows of airfoils gradually increases from the center of the ring to the edge; in the radial direction of the ring symmetrical array, multiple airfoils are arranged in multiple rings, and the distance between two adjacent airfoils in each ring gradually increases from the center of the ring to the edge. It also includes a base plate connected to the lower end of the airfoil; the airfoil is slidably and fixedly connected to the base plate via a connector, and an annular mesh groove is opened on the base plate, with a limiting member on the side wall of the mesh groove; the connector includes a connecting protrusion, a boss, a spring, and a ball, one end of the connecting protrusion is fixedly connected to the airfoil, the other end of the connecting protrusion is located in the mesh hole and is detachably and fixedly connected to one end of the boss, the boss is located in the mesh hole and the side of the boss facing the connecting protrusion contacts the limiting member, one end of the spring abuts against the other end of the boss, and the other end of the spring is sleeved on the outer wall of the ball, the spring is always in a compressed state, so that the boss abuts against the limiting member, and the ball can roll on the bottom of the mesh groove; the side of the limiting member facing the boss has multiple closely arranged limiting particles, and there is a limiting gap between two adjacent limiting particles; the side of the boss facing the limiting member has multiple closely arranged boss particles, and there is a boss gap between two adjacent boss particles, the boss particles are inserted into the limiting gaps, and the limiting particles are inserted into the boss gaps.

2. The airfoil array type superstructure airflow concentrator according to claim 1, characterized in that, The spacing between two adjacent airfoil rings is 10~15mm.

3. The airfoil array type superstructure airflow concentrator according to claim 1, characterized in that, The central region is defined as the area in the center of the annular symmetrical array where no airfoil is installed. The ratio of the diameter of the central region to the overall diameter of the annular symmetrical array and the diameter of the base plate is 1:4~5:5~7.

4. The airfoil array type superstructure airflow concentrator according to claim 1, characterized in that, The ratio of the height of the base plate to the overall height of the airfoil array-type superstructure airflow concentrator is 1:3~6.

5. The airfoil array type superstructure airflow concentrator according to any one of claims 1 to 4, characterized in that, The length of the airfoil is 30~50mm.

6. A wind power generation device, characterized in that, Including the airfoil array superstructure airflow concentrator as described in any one of claims 1 to 5.

Images