Multi-stage air inducing device for wind power generation

Abstract

The utility model provides a multistage air inducing device for wind power generation, which comprises an air guide cylinder, the air guide cylinder comprises an air inlet section and an air outlet section, the large opening end of the air inlet section faces downwards, the large opening end of the air outlet section faces upwards, and the cross section area of the large opening end of the air inlet section is larger than that of the large opening end of the air outlet section; the cross sectional area of the air outlet section is gradually increased from one side close to the air inlet section to one side far away from the air inlet section; the air inlet section comprises a necking part and a barrel-shaped part, a neck part is formed at the joint of the necking part and the air outlet section, a plurality of grooves are formed in the barrel-shaped part, and reducing parts are formed in the positions, corresponding to the grooves, of the inner wall of the barrel-shaped part. The wind power generation device is reasonable in structural design, after entering the wind guide barrel, external airflow can sequentially pass through the power generation impellers in the wind inlet section of the wind guide barrel, the power generation impellers are driven at the same time, the utilization rate of wind energy is increased, the power generation efficiency is reliably guaranteed, and continuous and stable power generation can be achieved even in the gentle breeze working condition environment.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary facilities of wind power generation equipment, and in particular relates to a multi-stage wind-inducing device for wind power generation. Background Art

[0002] Wind energy is a clean, pollution-free, renewable energy source. Wind power generation refers to the conversion of wind kinetic energy into electrical energy and has been widely used. However, since wind is a very unstable natural resource, wind power generation depends on the strength and stability of the wind. Most existing wind turbines are directly installed in cylindrical wind guide tubes. The unpredictable changes in wind speed cause the output power of wind turbines to fluctuate greatly. Lower-speed natural wind cannot start wind power generation, which directly affects the power generation efficiency. Especially in a breeze environment, it may cause the wind turbine to stop working or work at a lower efficiency, resulting in low power generation efficiency. Therefore, it is necessary to improve the wind guide tubes of existing wind turbines to adapt to the breeze environment and improve power generation efficiency. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a multi-stage wind-inducing device for wind power generation.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A multi-stage wind-inducing device for wind power generation comprises an air guide tube, which comprises an air inlet section and an air outlet section, wherein the large opening end of the air inlet section faces downward, and the large opening end of the air outlet section faces upward, and the cross-sectional area of ​​the large opening end of the air inlet section is larger than that of the large opening end of the air outlet section; the cross-sectional area of ​​the air outlet section gradually increases from the side close to the air inlet section to the side away from the air inlet section; the air inlet section comprises a neck portion and a cylindrical portion, a neck portion is formed at the junction of the neck portion and the air outlet section, a plurality of grooves are provided on the cylindrical portion, and a diameter reduction portion is formed on the inner wall of the cylindrical portion at the positions corresponding to the grooves.

[0006] Furthermore, the groove is a V-shaped groove.

[0007] Furthermore, a V-shaped constricted portion is formed on the inner wall of the cylindrical portion.

[0008] Furthermore, the inner edge of the neck portion adopts an arc transition.

[0009] Furthermore, the large opening end of the air inlet section is provided with an inclined outer eaves, and the junction between the outer eaves and the air inlet section is smoothly transitioned.

[0010] Furthermore, a side wall of the large opening end of the air outlet section is provided with an inclined guide surface, and the inclination angle of the guide surface is substantially equal to the inclination angle of the spoiler.

[0011] Furthermore, the air inlet section and the air outlet section are an integrally formed structure.

[0012] Furthermore, 2-3 grooves are provided on the cylindrical portion.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The present invention has a rational structural design. Because the junction between the air inlet and air outlet sections has a tapered portion with a narrowed inner diameter, and the cross-section of the air outlet section gradually increases from the side close to the air inlet section to the side away from the air inlet section, a "Venturi effect" is generated when the external air enters the guide tube through the air inlet section and is discharged from the air outlet section, accelerating the airflow entering the guide tube and increasing the driving force on the power generation impeller. After entering the guide tube, the external airflow will sequentially pass through the power generation impellers in the air inlet section of the guide tube and simultaneously drive each power generation impeller, thereby improving the utilization rate of wind energy, reliably ensuring power generation efficiency, and enabling continuous and stable power generation even in a light breeze. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 A schematic diagram of the structure created by the present invention;

[0017] Figure 2 This is a schematic diagram of the present invention without the axial flow wind turbine;

[0018] Figure 3 A schematic diagram of the axial flow wind turbine generator part of the present invention;

[0019] Figure 4 The figure is a schematic diagram of the appearance of the air guide tube part in the invention. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0024] A multi-stage wind-inducing device for wind power generation, such as Figures 1 to 4 As shown, the air guide 1 includes an air inlet section 2 and an air outlet section 3. When in use, an axial flow wind turbine 13 is installed in the air guide. Preferably, the air inlet section and the air outlet section are integrally formed. The large opening end 4 of the air inlet section faces downward, and the large opening end 5 of the air outlet section faces upward. The cross-sectional area of ​​the large opening end of the air inlet section is larger than that of the large opening end of the air outlet section, and the cross-sectional area of ​​the air outlet section gradually increases from the side close to the air inlet section to the side away from the air inlet section.

[0025] The air inlet section includes a constricted portion 6 and a cylindrical portion 7. The constricted portion and the air outlet section are connected to form a neck 8. Preferably, the inner edge of the constricted neck adopts an arc transition. Usually, the height of the air inlet section is greater than the height of the air outlet section, and the transition between the air inlet section and the air outlet section is smooth. In addition, the cross-sectional area of ​​the large opening end of the air inlet section is greater than the cross-sectional area of ​​the large opening end of the air outlet section. Therefore, when the airflow blown through the air duct enters the air outlet section, it will produce a "Venturi effect". The airflow is quickly discharged from the large opening end of the air outlet section and plays a "suction" role on the natural wind in the air inlet section, so that the axial flow generator fan in the air duct is driven more powerfully, thereby improving the power generation efficiency.

[0026] In the inventive solution of the present invention, a plurality of grooves 9 are provided on the cylindrical portion. For example, 2-3 grooves are provided on the cylindrical portion. A reduced diameter portion 10 is formed on the inner wall of the cylindrical portion at the position corresponding to the groove. For example, the groove is a V-shaped groove, and correspondingly, a V-shaped raised reduced neck portion is formed on the inner wall of the cylindrical portion. A plurality of groups of generating impellers 14 are provided on the rotating shaft of the axial flow wind turbine. The topmost generating impeller is provided corresponding to the neck portion, and the other generating impellers are provided corresponding to the reduced neck portions. By passing the generator shaft through the wind inlet section and installing a plurality of generating impellers at intervals on the generator shaft, the structural design created by the present invention can realize that a plurality of generating impellers are driven by wind at the same time, thereby improving the utilization rate of wind energy, making it possible to reliably guarantee the power generation efficiency, and to achieve continuous and stable power generation even in a breeze working environment.

[0027] In the inventive solution, the large opening end of the air inlet section is provided with an inclined outer eaves 11, and the transition between the outer eaves and the air inlet section is smooth. The smooth transition between the outer eaves and the air inlet section allows natural wind to be gathered through the cover outer eaves, thereby increasing the amount of air entering. A side wall of the large opening end of the air outlet section (behind the large opening end of the air outlet section, i.e., the side of the large opening end of the air outlet section away from the spoiler) is provided with an inclined guide surface 12. The inclination angle of this guide surface is roughly equal to the inclination angle of the spoiler, which can effectively guide the airflow to discharge quickly and smoothly, and is conducive to the generation of a "Venturi effect" during the airflow discharge from the air guide.

[0028] The present invention has a rational structural design. Because the junction between the air inlet and air outlet sections has a tapered portion with a narrowed inner diameter, and the cross-section of the air outlet section gradually increases from the side close to the air inlet section to the side away from the air inlet section, a "Venturi effect" is generated when the external air enters the guide tube through the air inlet section and is discharged from the air outlet section, accelerating the airflow entering the guide tube and increasing the driving force on the power generation impeller. After entering the guide tube, the external airflow will sequentially pass through the power generation impellers in the air inlet section of the guide tube and simultaneously drive each power generation impeller, thereby improving the utilization rate of wind energy, reliably ensuring power generation efficiency, and enabling continuous and stable power generation even in a light breeze.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-stage wind-inducing device for wind power generation, characterized in that: The air guide tube includes an air inlet section and an air outlet section, the large opening end of the air inlet section faces downward, the large opening end of the air outlet section faces upward, and the cross-sectional area of ​​the large opening end of the air inlet section is larger than the cross-sectional area of ​​the large opening end of the air outlet section; the cross-sectional area of ​​the air outlet section gradually increases from the side close to the air inlet section to the side away from the air inlet section; the air inlet section includes a necked portion and a cylindrical portion, a neck is formed at the junction of the necked portion and the air outlet section, a number of grooves are provided on the cylindrical portion, and a diameter reduction portion is formed at the position of the groove on the inner wall of the cylindrical portion.

2. The multi-stage wind-inducing device for wind power generation according to claim 1, characterized in that: The groove is a V-shaped groove.

3. The multi-stage wind-inducing device for wind power generation according to claim 2, characterized in that: A V-shaped protruding neck portion is formed on the inner wall of the cylindrical portion.

4. The multi-stage wind-inducing device for wind power generation according to claim 3, characterized in that: The inner edge of the neck is made of arc transition.

5. The multi-stage wind-inducing device for wind power generation according to claim 1, characterized in that: The large opening end of the air inlet section is provided with an inclined outer eaves, and the junction between the outer eaves and the air inlet section is smoothly transitioned.

6. The multi-stage wind-inducing device for wind power generation according to claim 1, characterized in that: A side wall of the large opening end of the air outlet section is provided with an inclined guide surface, and the inclination angle of the guide surface is substantially equal to the inclination angle of the spoiler.

7. The multi-stage wind-inducing device for wind power generation according to claim 1, characterized in that: The air inlet section and the air outlet section are an integrated structure.

8. The multi-stage wind-inducing device for wind power generation according to claim 1, characterized in that: There are 2-3 grooves on the cylindrical part.

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