Wind power generation device with Venturi effect

Abstract

The utility model relates to wind power generation, in particular to a wind power generation device with a Venturi effect, which solves the problems that the existing wind power generation equipment is loud in noise, easy to collide with flying birds, large in occupied area and greatly reduced in power generation efficiency under the condition of low wind speed when being applied to an urban environment. The wind power generation device comprises a wind catching unit, a hollow wind energy collecting ring, turbine blades and a generator. The wind catching unit is used for providing airflow for the turbine blades; the hollow wind energy collecting ring is of an annular structure defined by inwards-concave arc-shaped plates or folded plates and is installed at the top or the bottom of the wind catching unit, and the hollow wind energy collecting ring communicates with the wind catching unit. The turbine blades correspond to the hollow wind energy collecting ring and are rotationally installed in the wind catching unit, and the generator is connected with the turbine blades.

Description

Technical Field

[0001] This utility model relates to wind power generation, specifically to a wind power generation device that also exhibits the Venturi effect. Background Technology

[0002] With the increasing global demand for clean energy, wind power has received widespread attention as an important renewable energy source. Currently, wind power equipment is mostly deployed in areas far from cities, while wind resources in urban areas cannot be effectively utilized. Deploying traditional wind power equipment in cities presents several limitations:

[0003] 1) The blades of traditional wind power generation equipment generate loud noise when they are running, which disturbs the lives of nearby residents;

[0004] 2) When the blades are rotating at high speed, they may collide with flying birds, causing bird injuries or death and disrupting the ecological balance;

[0005] 3) Traditional wind power equipment occupies a large area, and the limited area in cities makes it difficult to deploy on a large scale. Moreover, the average wind speed in cities is relatively low, generally less than 4 m / s. Under such wind speed conditions, the efficiency of traditional wind power equipment will drop significantly, and it will not be able to fully realize its power generation capacity.

[0006] Therefore, developing a new type of wind power generation device that is adapted to the urban environment is of great practical significance. Utility Model Content

[0007] The purpose of this invention is to solve the technical problems of existing wind power generation equipment in urban environments, such as high noise levels, easy collisions with flying birds, large footprint, and significant decrease in power generation efficiency under low wind speed conditions, and to provide a wind power generation device that also incorporates the Venturi effect.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A wind power generation device that also exhibits the Venturi effect is unique in that:

[0010] Includes a wind tunnel unit, a hollow wind energy harvesting ring, turbine blades, and a generator;

[0011] The choke unit is used to provide airflow to the turbine blades;

[0012] The hollow wind energy collection ring is a ring-shaped structure formed by a concave arc-shaped plate or a folded plate, and is installed on the top or bottom of the wind-collecting unit. The hollow wind energy collection ring is connected to the wind-collecting unit.

[0013] The turbine blades are configured corresponding to the hollow wind energy collection ring and are rotatably installed inside the wind-collecting unit, and the generator is connected to the turbine blades.

[0014] Furthermore, the duct unit includes a duct seat and an air guide tube;

[0015] The hood is a hollow structure with an opening on the side;

[0016] The air duct is a cylindrical structure and is installed vertically on the inner top surface of the wind-collecting seat. The hollow wind energy collection ring is installed on the outer top surface of the wind-collecting seat, and the lower end of the hollow wind energy collection ring is connected to the upper end of the air duct.

[0017] Alternatively, the air duct is a cylindrical structure and is installed vertically on the outer top surface of the wind-collecting seat. The hollow wind energy collection ring is installed on the outer top surface of the wind-collecting seat and the air duct is located inside the hollow wind energy collection ring. The lower ends of both the hollow wind energy collection ring and the air duct are connected to the wind-collecting seat.

[0018] The turbine blades are coaxially rotatably installed inside the air duct, and the generator is coaxially connected to the turbine blades inside the air duct or connected by transmission outside the air duct.

[0019] Furthermore, the air intake unit includes a mounting bracket and an air duct;

[0020] The mounting frame includes a top plate and multiple support columns disposed at the bottom of the top plate;

[0021] The air duct is a right-angled, obtuse-angled, or acute-angled bent pipe structure. One end of the air duct is installed at the bottom of the top plate of the mounting frame, and the other end is flared.

[0022] The hollow wind energy collection ring is installed on the outer top surface of the mounting frame top plate, and the lower end of the hollow wind energy collection ring is connected to one end of the air guide pipe.

[0023] The turbine blades are rotatably installed inside the air duct, and the generator is coaxially connected to the turbine blades inside the air duct or driven by the generator outside the air duct.

[0024] Furthermore, it also includes a front windshield located at the upper edge of the side opening of the windshield seat;

[0025] The front wind vane is used to improve airflow at the bottom of the hollow wind energy collection ring.

[0026] The front wind vane is tilted downwards at an angle of 0-30°.

[0027] Furthermore, it also includes a rear wind deflector located at the upper edge of the leeward side of the hood;

[0028] The rear wind vane is used to improve airflow at the leeward side of the bottom of the hollow wind energy collection ring.

[0029] The rear air guide vane is tilted downwards at an angle of 0-40°.

[0030] Furthermore, the hollow wind energy collection ring and the air guide pipe are connected to the wind vane via bearings, and a wind vane is provided on the hollow wind energy collection ring or the wind vane.

[0031] Furthermore, it also includes the base located below the coupe seat;

[0032] The bottom of the wind-collecting seat is connected to the base via a bearing, and a wind vane is provided on the hollow wind energy collection ring or the wind-collecting seat.

[0033] Furthermore, the hollow wind energy collection ring is a ring-shaped structure formed by a concave arc-shaped plate, and its cross-section is C-shaped, U-shaped or semi-circular.

[0034] Alternatively, the hollow wind energy collection ring is a ring-shaped structure formed by concave folded plates, with a V-shaped cross-section.

[0035] Furthermore, the windshield is a polygonal cavity structure or an arc-shaped cavity structure, and the side opening is located on the windward surface.

[0036] Furthermore, the outer ring thickness of the hollow wind energy collection ring is greater than the inner ring thickness.

[0037] Compared with the prior art, the beneficial effects of this utility model are:

[0038] (1) The wind power generation device with Venturi effect provided by this utility model forms a negative pressure zone at the leeward side when the wind passes through the hollow wind energy collection ring, according to Bernoulli's principle and Venturi effect. The wind entering from the side opening of the wind sink will be drawn into the air duct and accelerated due to the presence of the negative pressure zone. At this time, the wind will drive the turbine blades to rotate, thereby driving the generator to rotate and generate electricity. Because of the embedded turbine blade design, the risk of bird strikes is prevented. Compared with the huge noise generated when the huge blades of traditional wind power generation equipment rotate, the turbine blades have low operating noise, compact overall structure, and small footprint. By combining the hollow wind energy collection ring and the air duct, the airflow is optimized, the starting wind speed of the generator is reduced, and the low-speed wind resources in the city can be effectively utilized.

[0039] (2) The wind power generation device with Venturi effect provided by this utility model has a front wind vane at the upper edge of the side opening of the wind sink to improve the airflow at the bottom of the hollow wind energy collection ring. A rear wind vane is provided at the upper edge of the leeward side of the wind sink to improve the airflow at the bottom of the hollow wind energy collection ring, which is conducive to the formation of a negative pressure zone and accelerates the wind speed in the wind duct.

[0040] (3) The wind power generation device with Venturi effect provided by this utility model sets one end of the air guide pipe into a funnel shape, which has a certain wind gathering effect. The mounting frame includes a top plate and multiple support columns set at the bottom of the top plate. Compared with the wind scoop seat, the structure is simple and the maintenance is convenient. Attached Figure Description

[0041] Figure 1 This is a three-dimensional structural diagram of a wind power generation device with Venturi effect according to Embodiment 1 of the present invention (turbine blades, generator and base are not shown);

[0042] Figure 2 This is a front view of Embodiment 1 of the present invention (turbine blades, generator, and base are not shown);

[0043] Figure 3 The cross section for wind speed CFD verification of the flow field distribution in Embodiment 1 of this utility model. Figure 1 ;

[0044] Figure 4 The cross section for wind speed CFD verification of the flow field distribution in Embodiment 1 of this utility model. Figure 2 ;

[0045] Figure 5 for Figure 3 Vector graphics;

[0046] Figure 6 for Figure 4 Vector graphics;

[0047] Figure 7 This is a three-dimensional structural diagram of Embodiment 2 of the wind power generation device with Venturi effect of this utility model (turbine blades, generator and base are not shown).

[0048] The annotations in the attached figures are explained as follows:

[0049] 1-Windshaft base, 2-Air duct, 3-Hollow wind energy collection ring, 4-Front wind guide rim, 5-Rear wind guide rim, 6-Mounting bracket. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings and exemplary embodiments.

[0051] Example 1:

[0052] Reference Figures 1-6 The present invention provides a wind power generation device with Venturi effect, which includes a wind-collecting unit, a hollow wind energy collection ring 3, turbine blades and a generator; the wind-collecting unit is used to provide airflow to the turbine blades.

[0053] In this embodiment, the wind-gathering unit includes a wind-gathering seat 1 and a wind-guiding pipe 2. The wind-gathering seat 1 is used to gather air and is a cavity structure with a side opening. The wind-gathering seat 1 can be a polygonal cavity structure or an arc-shaped cavity structure. For ease of processing, in this embodiment, the wind-gathering seat 1 adopts a rectangular cavity structure in the polygonal cavity structure, and its side opening is set on the windward surface to facilitate air gathering.

[0054] The air duct 2 is a cylindrical structure and is installed vertically on the inner top surface of the wind-collecting seat 1. The hollow wind energy collection ring 3 is a ring structure formed by a concave arc-shaped plate or a folded plate. If the hollow wind energy collection ring 3 is a ring structure formed by a concave arc-shaped plate, its cross-section is C-shaped, U-shaped, or semi-circular. If the hollow wind energy collection ring 3 is a ring structure formed by a concave folded plate, its cross-section is V-shaped. The outer ring thickness of the hollow wind energy collection ring 3 is greater than the inner ring thickness. When wind blows across the hollow wind energy collection ring 3, a negative pressure zone will be formed at its leeward side according to Bernoulli's principle and Venturi effect.

[0055] The hollow wind energy collection ring 3 is installed on the outer top surface of the wind-collecting base 1. The bottom of the hollow wind energy collection ring 3 is connected to the upper end of the air guide pipe 2. Alternatively, the air guide pipe 2 is still a cylindrical structure, but it is installed on the outer top surface of the wind-collecting base 1 in a vertical direction. The hollow wind energy collection ring 3 is installed on the outer top surface of the wind-collecting base 1 and the air guide pipe 2 is located inside the hollow wind energy collection ring 3. The lower ends of both the hollow wind energy collection ring 3 and the air guide pipe 2 are connected to the wind-collecting base 1.

[0056] To adapt to changing wind direction, the hollow wind energy collection ring 3 and the wind guide pipe 2 are connected to the wind catcher 1 through bearings. This allows the orientation of the hollow wind energy collection ring 3 to be adjusted in real time according to the wind direction, ensuring power generation efficiency. A wind vane is installed on the hollow wind energy collection ring 3 or the wind catcher 1 for real-time monitoring of wind direction.

[0057] In order to ensure the wind-gathering efficiency of the wind-gathering seat 1, it is necessary to ensure that its side opening is facing the wind. Therefore, a base is provided below the wind-gathering seat 1. The bottom of the wind-gathering seat 1 is connected to the base through a bearing. In this way, the orientation of the side opening of the wind-gathering seat 1 can be adjusted by rotating it to ensure the wind-gathering efficiency.

[0058] The turbine blades are coaxially mounted inside the air duct 2. In this embodiment, the turbine blades adopt the NACA-4415 airfoil with a chord length c. i Distribution according to formula

[0059]

[0060] Where: C Li Ф is the lift coefficient. i r is the airflow tilt angle. i Let a be the radius of the i-th section of the turbine blade. iLet B be the axial induction factor for the i-th cross section, and B be the number of turbine blades.

[0061] Furthermore, the angle of attack of the turbine blades decreases from 8° at the root to 4° at the tip.

[0062] The generator and turbine blades are coaxially connected inside the air duct 2. This connection method is simple and direct, and there are no extra transmission parts, resulting in high mechanical efficiency. If there is not enough space inside the air duct 2 to install the generator, the generator and turbine blades can be connected outside the air duct 2 via a transmission shaft. Although this method will result in some loss of mechanical efficiency, the generator installation position can be selected according to the actual situation, providing strong installation flexibility.

[0063] Depend on Figures 3-6 The airflow velocity and direction as the wind blows across the entire wind power generation device are clearly visible. To facilitate the formation of a negative pressure zone, a front guide vane 4 is installed at the upper edge of the opening on the side of the windshield 1. Figure 3 and Figure 5 It can be seen that it improves the airflow at the bottom of the hollow wind energy collection ring 3, and the front wind vane 4 is tilted downwards at an angle of 0-30°.

[0064] A rear wind guide 5 is provided on the upper edge of the leeward side of the wind-collecting seat 1. It is used to increase the airflow speed at the bottom of the hollow wind energy collection ring 3 in the leeward direction. The rear wind guide 5 is also tilted downward with an angle of 0-40°.

[0065] In use, the side opening of the wind vane 1 and the windward side of the hollow wind energy collection ring 3 are adjusted according to the wind vane. At this time, the wind blows through the hollow wind energy collection ring 3, forming a negative pressure zone at its leeward side. The wind gathered into the wind vane 1 is drawn into the air duct 2 due to the existence of the negative pressure zone and accelerated to about 1.4-2 times its original speed. Finally, it flows out from the hollow wind energy collection ring 3. During the wind flow, it drives the turbine blades to rotate, which in turn drives the generator to rotate and complete the power generation.

[0066] Example 2:

[0067] Reference Figure 7 The wind power generation device of this utility model with Venturi effect includes a wind scooping unit, a hollow wind energy collection ring 3, turbine blades and a generator; in this embodiment, the wind scooping unit includes a mounting frame 6 and a wind duct 2. The structure of the hollow wind energy collection ring 3 in this embodiment is the same as that in embodiment one, and will not be described again here.

[0068] Mounting frame 6 includes a top plate and multiple support columns set at the bottom of the top plate. Unlike the wind-collecting seat 1 in Embodiment 1, mounting frame 6 only serves as a support and no longer serves as a wind-gathering function. In this case, the wind-gathering function is undertaken by the air guide duct 2. The air guide duct 2 is different from the air guide duct 2 in Embodiment 1 in that it is a right-angle, acute-angle, or obtuse-angle bent pipe structure. In order to achieve the best wind-gathering effect, a right-angle bent pipe structure is adopted in this embodiment. One end of it is installed at the bottom of the top plate of mounting frame 6, while the hollow wind energy collector 3 is installed on the outer top surface of the top plate of mounting frame 6, and its lower end is connected to one end of the air guide duct 2. In order to serve as a wind-gathering function, the other end of the air guide duct 2 is flared to increase the air intake area and also play a certain role in gathering the wind.

[0069] The turbine blades are rotatably installed inside the air duct 2. The generator and the turbine blades are coaxially connected inside the air duct 2 or driven by transmission outside the air duct 2. The structure of the turbine blades is the same as in Embodiment 1, and will not be described again here.

[0070] The hollow wind energy collection ring 3 and the air guide pipe 2 are connected to the top plate through bearings. A base can also be set at the bottom of the mounting frame 7. The mounting frame 6 and the base are rotatably connected through bearings. This allows the orientation of the windward side of the hollow wind energy collection ring 3 and the flared end of the air guide pipe 2 to be adjusted in real time according to the wind direction, so that the windward side of the hollow wind energy collection ring 3 and the flared end of the air guide pipe 2 are always facing the wind, thereby improving power generation efficiency.

[0071] The windward side of the top plate tilts downward to form the front wind vane 4, with the same tilt angle as in Embodiment 1, which is 0-30°. The leeward side of the top plate also tilts downward to form the rear wind vane 5, with a tilt angle of 0-40°. The functions of the front wind vane 4 and the rear wind vane 5 in this embodiment are the same as in Embodiment 1, and will not be repeated here.

[0072] Compared to Example 1, the structure in Example 2 has lower processing costs and is easier to maintain.

[0073] The embodiments described above are merely descriptions of specific implementations of this utility model and are not intended to limit the scope of this utility model. Various modifications and improvements made to the technical solutions of this utility model by those skilled in the art without departing from the spirit of this utility model should fall within the protection scope defined by the claims of this utility model.

Claims

1. A wind power generation device that also exhibits the Venturi effect, characterized in that: Includes a wind tunnel unit, a hollow wind energy harvesting ring (3), turbine blades, and a generator; The choke unit is used to provide airflow to the turbine blades; The hollow wind energy collection ring (3) is a ring structure formed by a concave arc plate or folded plate, and is installed on the top or bottom of the wind-catching unit. The hollow wind energy collection ring (3) is connected to the wind-catching unit. The turbine blades are set in relation to the hollow wind energy collection ring (3) and are rotatably installed in the wind-collecting unit. The generator is connected to the turbine blades.

2. The wind power generation device with Venturi effect according to claim 1, characterized in that: The duct unit includes a duct seat (1) and an air guide tube (2); The vent seat (1) is a hollow structure with an opening on the side; The air duct (2) is a cylindrical structure and is installed on the inner top surface of the wind-collecting seat (1) in a vertical direction. The hollow wind energy collection ring (3) is installed on the outer top surface of the wind-collecting seat (1), and the lower end of the hollow wind energy collection ring (3) is connected to the upper end of the air duct (2). Alternatively, the air duct (2) is a cylindrical structure and is installed on the outer top surface of the wind-collecting seat (1) in a vertical direction. The hollow wind energy collection ring (3) is installed on the outer top surface of the wind-collecting seat (1) and the air duct (2) is located inside the hollow wind energy collection ring (3). The lower ends of the hollow wind energy collection ring (3) and the air duct (2) are both connected to the wind-collecting seat (1). The turbine blades are coaxially rotatably installed inside the air duct (2), and the generator and turbine blades are coaxially connected inside the air duct (2) or driven to be connected outside the air duct (2).

3. The wind power generation device with Venturi effect according to claim 1, characterized in that: The air intake unit includes a mounting bracket (6) and an air duct (2); The mounting frame (6) includes a top plate and a plurality of support columns disposed at the bottom of the top plate; The air duct (2) is a right-angled, obtuse-angled or acute-angled bent pipe structure. One end of the air duct (2) is installed at the bottom of the top plate of the mounting bracket (6), and the other end is in the shape of a flared mouth. The hollow wind energy collection ring (3) is installed on the outer top surface of the top plate of the mounting frame (6), and the lower end of the hollow wind energy collection ring (3) is connected to one end of the air guide pipe (2); The turbine blades are rotatably installed inside the air duct (2), and the generator and the turbine blades are coaxially connected inside the air duct (2) or connected by transmission outside the air duct (2).

4. The wind power generation device with Venturi effect according to claim 2, characterized in that: It also includes a front windshield (4) located at the upper edge of the side opening of the windshield (1); The front wind vane (4) is used to improve the airflow at the bottom of the hollow wind energy collection ring (3); The front wind vane (4) is tilted downwards at an angle of 0-30°.

5. The wind power generation device with Venturi effect according to claim 4, characterized in that: It also includes a rear wind deflector (5) located on the upper edge of the leeward side of the windshield seat (1); The rear wind vane (5) is used to improve the airflow at the leeward side of the bottom of the hollow wind energy collection ring (3); The rear wind vane (5) is tilted downwards at an angle of 0-40°.

6. The wind power generation device with Venturi effect according to claim 5, characterized in that: The hollow wind energy collection ring (3) and the air guide pipe (2) are connected to the wind-catching seat (1) through bearings, and a wind vane is provided on the hollow wind energy collection ring (3) or the wind-catching seat (1).

7. The wind power generation device with Venturi effect according to claim 2, characterized in that: It also includes the base located below the coupe seat (1); The bottom of the wind-collecting seat (1) is connected to the base via a bearing, and a wind vane is provided on the hollow wind energy collection ring (3) or the wind-collecting seat (1).

8. The wind power generation device with Venturi effect according to claim 2 or 3, characterized in that: The hollow wind energy collection ring (3) is a ring structure formed by a concave arc plate, and its cross-section is C-shaped, U-shaped or semi-circular. Alternatively, the hollow wind energy collection ring (3) is a ring structure formed by concave folded plates, and its cross-section is V-shaped.

9. The wind power generation device with Venturi effect according to claim 2, characterized in that: The windshield (1) is a polygonal cavity structure or an arc-shaped cavity structure, and the side opening is located on the windward side.

10. The wind power generation device with Venturi effect according to claim 1, characterized in that: The outer ring thickness of the hollow wind energy collection ring (3) is greater than the inner ring thickness.

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