A wind-gathering and flow-guiding device for micro-wind power generation

Abstract

The present invention discloses a wind-gathering and flow-guiding device for micro-wind power generation, which comprises a wind-gathering cover (2), a conversion cone (9) and flow-guiding vanes (10); the outer sides of one ends of a plurality of flow-guiding vanes (10) are circumferentially and evenly distributed and tightly attached and fixed to the inner surface of the wind-gathering cover, and the inner sides are attached and fixed to the conversion cone (9) so that the flow-guiding cone is coaxial with the wind-gathering cover; the diameter of the air inlet of the wind-gathering cover (2) is larger than the diameter of the air outlet. The present invention increases the inlet wind speed of the fan, so that the fan can be started even under the condition of relatively low-speed natural wind.

Description

Technical Field

[0001] The present invention belongs to the field of wind power generation, and particularly relates to a wind-gathering and guiding device for micro-wind power generation. Background Art

[0002] The starting wind speed of existing wind power generation devices is generally above 2.5 m / s, and the rated power generation wind speed is above 15 m / s. The relatively low-speed natural wind cannot start the existing wind power generation devices. Such operating conditions of the wind turbines cannot be maintained for a long time in most areas of China, resulting in the wind turbines being in a shutdown state for a long time, thus causing low power generation efficiency of the wind turbines. Summary of the Invention

[0003] (I) Technical Problem to be Solved

[0004] The present invention provides a wind-gathering and guiding device for micro-wind power generation to solve the problem that the wind turbine cannot be started under relatively low-speed natural wind conditions.

[0005] (II) Technical Solution

[0006] To solve the above technical problem, the present invention provides a wind-gathering and guiding device for micro-wind power generation, which is characterized in that it includes a wind-gathering cover, a conversion cone and guide vanes; the outer edges of one ends of a plurality of guide vanes are circumferentially and evenly distributed and tightly attached and fixed to the inner surface of the wind-gathering cover, and the inner edges are attached and fixed to the conversion cone, so that the guide cone is coaxial with the wind-gathering cover; the diameter of the air inlet of the wind-gathering cover is larger than the diameter of the air outlet.

[0007] (III) Advantageous Effects

[0008] The present invention increases the inlet wind speed of the wind turbine, so that the wind turbine can be started even under relatively low-speed natural wind conditions. Brief Description of the Drawings

[0009] Figure 1 It is the rear view of the present invention;

[0010] Figure 2 It is the front view of the present invention;

[0011] Figure 3 It is the front view of the present invention;

[0012] Figure 4 (a)(b)(c)(d) are schematic structural diagrams of the guide vanes in different orientations.

[0013] Wherein: 1. Follow-up tail fin, 2. Wind-gathering cover, 3. Wind turbine installation position, 4. Fixed bracket, 5. Wind turbine wire trough, 6. Turntable support roller, 7. Base, 8. Wind turbine installation duct, 9. Conversion cone, 10. Guide vane. Detailed Description of the Invention

[0014] To make the objectives, content, and advantages of the present invention clearer, the following further describes in detail the specific implementation manners of the present invention in conjunction with the accompanying drawings and embodiments.

[0015] This embodiment provides a wind-gathering and guiding device for micro-wind power generation, including a follow-up tail fin 1, a wind-gathering hood 2, a fixed bracket 4, a wind turbine wire trough 5, a turntable support roller 6, a base 7, a wind turbine installation duct 8, a conversion cone 9, and a guiding vane 10.

[0016] The installation relationship among the wind-gathering hood 2, the conversion cone 9, and the guiding vane 10 of the wind-gathering and guiding device is as Figure 2 , 3 shown.

[0017] The outer edges of one ends of multiple guiding vanes 10 are evenly distributed and tightly attached and fixed along the inner surface circumference of the wind-gathering hood, and the inner edges are attached and fixed to the conversion cone 9, making the guiding cone coaxial with the wind-gathering hood; such an installation method ensures that the guiding vanes of the wind-gathering and guiding device can fully control and guide the flowing air in the wind-gathering hood.

[0018] The shape of the guiding vane 10 is determined by optimizing the flow field simulation, and its shape structure is as Figure 4 shown. The guiding vanes are placed between the inner wall of the wind-gathering hood and the conversion cone, with a total of six pieces, evenly distributed in a ring along the axis of the wind-gathering hood. The guiding vanes are bent and formed, the outer edges are tangent to the outer surface of the guiding cone; the inner edges are perpendicular to the axis of the wind-gathering hood and are reduced by 10° along the axis from the air inlet to the air outlet direction; the included angle formed between the outer edges and the inner edges is 30°.

[0019] This shape scheme can minimize the loss of wind energy to the greatest extent and effectively change the flow direction of the wind in the wind-gathering hood.

[0020] A wind turbine installation duct 8 is provided at the tail of the wind-gathering hood, which is an extension of the tail of the wind-gathering hood and is used to place the blades of the wind turbine, so that the blades can make full use of the wind modulated by the wind-gathering and guiding system to generate electricity efficiently.

[0021] The wind-gathering hood 2 is fixed on the fixed bracket 4, and the fixed bracket 4 is rotationally connected to the base 7 through the turntable support roller 6;

[0022] A wind turbine wire trough 5 is provided on the fixed bracket 4, and the electric energy generated by the rotation of the wind turbine is transmitted to the electric energy collection device through the wires arranged in the wind turbine wire trough.

[0023] The follow-up tail fin 1 is vertically fixed on the outside of the wind-gathering hood 2. The follow-up tail fin controls the wind-gathering and guiding device according to different wind directions, so that the wind-gathering and guiding device rotates through the turntable support roller and always faces the natural wind direction. The diameter of the air inlet of the wind-gathering hood 2 is larger than the diameter of the air outlet;

[0024] When in the working state, natural wind enters from the inlet of the wind-gathering device. Through the compression of the wind-gathering hood and the deflection of the guide vanes, the wind speed in the position of the duct where the fan is installed is formed in the same direction as the rotation direction of the fan blades. The conversion cone squeezes the wind direction with low pushing efficiency in the center of the wind-gathering hood towards the periphery, further improving the wind energy utilization rate. During this process, the natural wind is accelerated by 1.3 to 1.5 times, and the pushing efficiency acting on the fan is increased by 1.5 to 1.7 times.

[0025] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A wind-gathering and flow-guiding device for micro-wind power generation, characterized in that: It includes a wind collecting hood (2), a conversion cone (9) and a deflector (10); the outer edges of one ends of multiple deflectors (10) are evenly distributed and tightly fixed along the circumference of the inner surface of the wind collecting hood, and the inner edges are fixed in contact with the conversion cone (9), so that the conversion cone and the wind collecting hood are coaxial; the diameter of the air inlet of the wind collecting hood (2) is larger than the diameter of the air outlet; the deflector is bent and formed, the outer edge is tangent to the outer shape surface of the conversion cone, the inner edge is perpendicular to the axis of the wind collecting hood, and it shrinks from the air inlet to the air outlet along the axis, and a certain angle is formed between the outer edge and the inner edge; a fan installation duct is provided at the tail of the wind collecting hood, which is an extension of the tail of the wind collecting hood and is used to place the fan blades, and the natural wind forms a wind speed in the same direction as the rotation direction of the fan blades at the position of the fan installation duct.

2. The wind-gathering and flow-guiding device for micro-wind power generation according to claim 1, characterized in that: The deflectors are placed between the inner wall of the wind collecting hood and the conversion cone, with a total of six pieces, and are evenly distributed in a ring along the axis of the wind collecting hood.

3. The wind-gathering and flow-guiding device for micro-wind power generation according to claim 1, characterized in that: The deflectors shrink by 10° from the air inlet to the air outlet along the axis, and the angle formed between the outer edge and the inner edge of the deflector is 30°.

4. The wind-gathering and flow-guiding device for micro-wind power generation according to claim 1, characterized in that: The wind collecting hood is rotatably connected to the base through a fixed bracket.

5. The wind-gathering and flow-guiding device for micro-wind power generation according to claim 2, characterized in that: The wind collecting hood is fixed on the fixed bracket, and the fixed bracket is rotatably connected to the base through a turntable support roller.

6. The wind-gathering and flow-guiding device for micro-wind power generation according to claim 4, characterized in that: A fan wire trough is provided on the fixed bracket, and the electric energy generated by the rotation of the fan is transmitted to the electric energy collection device through the wires arranged in the fan wire trough.

7. The wind-gathering and flow-guiding device for micro-wind power generation according to claim 1, characterized in that: The conversion cone is a conical structure.

8. The wind-gathering and flow-guiding device for micro-wind power generation according to claim 1, characterized in that: A follow-up tail wing is vertically fixed on the outside of the wind collecting hood, and the follow-up tail wing controls the wind collecting hood to always face the direction of the natural wind according to different wind directions.

Images