A small wind generator

Abstract

The utility model discloses a small -size wind driven generator relates to renewable energy equipment field, aims at solving the low wind energy utilization rate of existing equipment, breeze difficult start etc. The generator includes fan assembly, fan frame, generator, electrical control box and fixed base, and fan assembly contains half spindle flow line shape conical cylinder, the arc wind -guiding blade of circumferential interval arrangement and the fan main shaft of through conical cylinder, and the flow line shape conical cylinder and arc blade reduce the resistance and make an uproar, and low wind speed can start, and the wind energy utilization rate is high, and the eccentric connection of U type frame and support combines the conical cylinder structure and realizes automatic wind searching, and safe easy maintenance. Can be used for family, outdoor camping, remote base power supply, and the application prospect is wide.

Description

Technical Field

[0001] This utility model relates to the field of renewable energy equipment technology, specifically to a small wind turbine. Background Technology

[0002] Wind energy, as a clean, renewable, and green energy source, is receiving increasing attention for its development and utilization. Wind turbines are mainly divided into large grid-connected wind turbines and small off-grid / grid-connected wind turbines. Among them, small wind turbines have broad application prospects in areas such as power supply to remote areas, distributed urban power generation, outdoor lighting, and household backup power. Existing small wind turbines generally suffer from problems such as low wind energy utilization, difficulty in starting in low wind conditions, and complex structures leading to inconvenient installation and maintenance.

[0003] Therefore, there is an urgent need for a small wind turbine that can efficiently utilize low-speed wind energy, automatically locate wind, has a simple structure, low noise, and is easy to install and maintain. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model provides a small wind turbine generator, including: a wind turbine assembly, a wind turbine frame, a generator, and an electrical control box. The wind turbine assembly includes a cone and a main shaft. The cone is configured to split and guide airflow. The open end of the cone is fixedly connected to guide vanes for accelerating and further guiding the split and guided airflow. The main shaft extends through both ends of the cone and is fixedly connected to one end of the cone.

[0005] In some embodiments of this utility model, the cone is constructed as a semi-spindle streamline shape with one end pointed and the other end rounded and wide, with a cone tail end and a rounded cone opening end.

[0006] In some embodiments of this utility model, there are multiple air guide blades, and the multiple air guide blades are arranged at intervals along the circumferential direction of the cone opening end.

[0007] In some embodiments of this utility model, along the circumferential direction of the cone opening end, the diameter of the arc-shaped cross-section of the guide vane gradually expands from the smallest diameter air inlet to the largest diameter air outlet.

[0008] In some embodiments of this utility model, the wind turbine frame includes a U-shaped frame, a bracket, a generator support plate, and a diagonal brace. The main shaft of the wind turbine is rotatably connected to the two side arms of the U-shaped frame via bearings. One end of the generator support plate is fixedly connected to the middle of the side arm of the U-shaped frame near the tail end of the cone. The diagonal brace is inclinedly supported between the lower surface of the generator support plate and the side arm of the U-shaped frame. A generator is placed on the generator support plate, and the input end rotating shaft of the generator is fixedly connected to the end of the main shaft of the wind turbine near the tail end of the cone.

[0009] In some embodiments of this utility model, the bottom surface of the U-shaped frame is rotatably connected to the upper end of the support via a rotating bearing at one-fifth of the distance from the tail end of the cone to the opening end of the cone.

[0010] In some embodiments of this utility model, the lower end of the bracket is fixedly connected to the electrical control box via a fixing flange.

[0011] In some embodiments of this utility model, the top of the bracket is provided with a hollow shaft type standard slip ring.

[0012] In some embodiments of this utility model, the diagonal brace, U-shaped frame, and bracket are all hollow structures, forming cable channels inside. The generator's internal output cable passes sequentially through the internal cavities of the generator support plate, diagonal brace, U-shaped frame, and bracket, and is electrically connected to the electrical control box.

[0013] The advantages of this invention compared to existing technologies are as follows: the semi-spindle streamlined cone and the arc-shaped channel of the guide vanes reduce wind resistance; the inlet and outlet designs with different cross-sectional dimensions of the guide channel create a pressure difference in the vanes, allowing for activation even at low wind speeds, efficiently capturing wind energy, and improving the utilization efficiency of low-speed wind energy; the guide vanes better guide airflow, reducing energy loss from eddies and turbulence, further reducing air resistance, resulting in smoother rotation and lower noise. By setting the rotation connection point of the U-shaped frame and the support at a precise position one-fifth of the distance from the tail end of the cone to the opening end, combined with the gravity structure of the cone, aerodynamic principles are cleverly utilized to achieve automatic wind alignment and consistently efficient wind capture. The overall structure of the device is simple and safe, can efficiently utilize low-speed wind energy, has low noise, is easy to install and maintain, and is easy to promote and use. Attached Figure Description

[0014] Figure 1 This is a front-view perspective three-dimensional structural diagram of a small wind turbine according to this utility model. Figure 1 .

[0015] Figure 2 This is a rear side perspective three-dimensional structural diagram of a small wind turbine according to this utility model. Figure 2 .

[0016] Figure 3 This is a left view of a small wind turbine according to this utility model.

[0017] Figure 4 yes Figure 1 A partially enlarged schematic diagram of the guide vane at point G.

[0018] Figure 5 This is a schematic diagram illustrating a usage example of a small wind turbine generator with a wind direction indicator arrow, according to this utility model.

[0019] Figure label:

[0020] Fan assembly 100;

[0021] Cone 101; Guide vane 102; Air outlet 1021; Air inlet 1022; Fan main shaft 103;

[0022] 104 at the tail end of the cone; 105 at the opening end of the cone;

[0023] Fan frame 200;

[0024] 201 U-shaped frame; 202 bracket; 203 generator support plate; 204 diagonal brace; 205 tail end bearing;

[0025] Open-end bearing 206; bracket bearing 207; fixed flange 208;

[0026] Generator 300;

[0027] Electrical control box 400; Control console 401;

[0028] Fixed base 500; base plate 501; mounting hole 502. Detailed Implementation

[0029] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] Combined with appendix Figure 1-5 The present invention provides a small wind turbine generator, which is mainly composed of a wind turbine assembly 100, a wind turbine frame 200, a generator 300, an electrical control box 400, and a fixed base 500.

[0032] like Figure 1-3As shown, the wind turbine assembly 100 is the core component for capturing and converting wind energy, including a cone 101, guide vanes 102, and a main shaft 103. The cone 101 is designed as a semi-spindle streamlined shape with one pointed end and a rounded, broad end. The tail end 104 of the cone is sharp, and the opening end 105 is rounded and broad. This streamlined structure effectively reduces air resistance and evenly guides and distributes airflow from the tail end 104 to the opening end 105. The main shaft 103 extends through both ends of the cone 101 and serves as the main component for transmitting mechanical energy. The main shaft 103 is integrally mounted with the cone 101, connected via flanges, or welded to it, and has sufficient torque transmission capacity.

[0033] like Figure 1 and 2 As shown, multiple guide vanes 102 are evenly arranged circumferentially on the outer edge of the cone opening 105 by welding or integral molding. The guide vanes 102 are arc-shaped blades with a gradually expanding cross-sectional diameter, while their air inlets 1022 have a smaller cross-sectional diameter. Figure 4 As shown, the outlet 1021 has a large cross-sectional diameter, forming a smooth, streamlined arc-shaped cavity at the inlet and outlet. When wind blows, the airflow is compressed and accelerated within this arc-shaped channel before being ejected, acting on the curved surface of the blades to generate a powerful thrust that drives the entire fan assembly to rotate around the main shaft 103. Simultaneously, the arc-shaped channel of the guide vanes 102 better guides the airflow, reducing energy loss from eddies and turbulence, further reducing air resistance, resulting in smoother rotation and lower noise.

[0034] In some embodiments of this utility model, the number, size, and angle of the wind guide blades 102 can be optimized according to different usage environments and wind speed conditions to achieve the best wind energy utilization effect.

[0035] like Figure 1-3 As shown, the wind turbine frame 200 supports the wind turbine assembly 100 and the generator 300, and includes a U-shaped frame 201, a bracket 202, a generator support plate 203, and diagonal braces 204. The two arms of the U-shaped frame 201 are rotatably connected to the wind turbine main shaft 103 via open-end bearings 206 and tail-end bearings 205, allowing the wind turbine main shaft 103 to rotate flexibly and reducing frictional resistance during rotation. The lower wall of the U-shaped frame 201 is rotatably connected to the upper end of the bracket 202 via a rotating bearing 207 at one-fifth of the distance from the tail end 104 to the open end 105 of the cone, allowing the U-shaped frame 201 to rotate around the upper end of the bracket 202.

[0036] In some embodiments of this utility model, such as Figure 5As shown, when the tail end 104 of the cone faces the wind direction, the axis of the cone is parallel to the wind direction, and the wind flows symmetrically across both sides of the cone. At this time, the pressure exerted by the wind on the left and right sides of the cone is equal, so no lateral force is generated that would cause the cone to rotate. It is only subjected to resistance along the axis, and at this time the fan assembly 100 rotates stably around the fan main shaft 103.

[0037] In some embodiments of this invention, when the wind direction changes, an angle appears between the wind direction and the axis of the cone 101, causing the incoming wind flow to become asymmetrical. On the windward side, the wind directly impacts the "side" of the cone 101, creating a high-pressure area. On the leeward side, the airflow separates behind the cone 101, generating vortices and forming a low-pressure area. The pressure difference on both sides generates a resultant force, the point of application of which is usually located in front of the cone's center of gravity. The support 202 is positioned on the lower wall of the U-shaped frame 201 at one-fifth of the distance from the cone's tail end 104 to its opening end 105. The pressure center relative to the fulcrum generates a restoring torque, pushing the entire fan assembly 100 and the U-shaped frame 201 as a whole to rotate until its axis is parallel to the wind direction again, restoring pressure balance on both sides.

[0038] This design allows the entire wind turbine assembly 100 and U-shaped frame 201 to easily adapt to wind from any direction, enabling the wind turbine assembly 100 to automatically adjust its direction according to the wind direction and always remain perpendicular to the wind direction, thereby maximizing the capture of wind energy.

[0039] like Figure 1-3 As shown, the generator support plate 203 is used to place the generator 300. The diagonal brace 204 is inclinedly supported between the generator support plate 203 and the U-shaped frame 201, forming a stable triangular support structure together with the U-shaped frame 201 and the generator support plate 203, ensuring that the generator 300 is firmly installed and will not shake or shift during equipment operation. The input end rotating shaft of the generator 300 is connected to one end of the fan main shaft 103. When the fan main shaft 103 rotates under the action of wind, it drives the input end rotating shaft of the generator 300 to rotate, and the generator 300 converts mechanical energy into electrical energy.

[0040] like Figure 1-3 As shown, the lower end of the bracket 202 is connected to the electrical control box 400 via a fixing flange 208. The fixing flange 208 makes the connection between the bracket 202 and the electrical control box 400 more secure and reliable, and also facilitates installation and disassembly.

[0041] In some embodiments of this invention, the diagonal brace 204, the U-shaped frame 201, and the bracket 202 are all hollow structures, forming cable channels inside. The internal output cable of the generator 300 passes sequentially through the internal cavities of the generator support plate 203, the diagonal brace 204, the U-shaped frame 201, and the bracket 202, and is electrically connected to the electrical control box 400. A hollow shaft-type standard slip ring is provided at the top of the bracket 202. This cable arrangement protects the cable from damage by the external environment and extends the cable's service life.

[0042] In some embodiments of this utility model, the electrical control box 400 is equipped with rectification, voltage stabilization, and energy storage circuit modules to process and store the electrical energy generated by the generator 300, enabling it to meet the needs of household electrical appliances. Simultaneously, the electrical control box 400 is also equipped with a control console 401, through which users can operate and configure the equipment.

[0043] In some embodiments of this utility model, such as Figure 1-3 As shown, the base 500 is welded from steel plate and has multiple mounting holes 502 on it, which can be used to fix it to the concrete foundation or roof support with anchor bolts.

[0044] In some embodiments of this utility model, when wind blows, the fan assembly 100 and the U-shaped frame 201 automatically adjust their direction according to the wind direction. When the fan assembly 100 is directly facing the wind, such as... Figure 5 As shown, when the wind blows, the airflow acts on the special curved surface of the guide vane 102, generating a rotational torque that drives the fan assembly 100 to rotate at high speed around the main shaft 103. The mechanical energy of the rotation is transmitted to the generator 300 through the fan main shaft 103, converting it into electrical energy. The generated electrical energy is transmitted to the electrical control box 400 through an internal cable, and after rectification, voltage stabilization, and control, it is stored in the battery or directly inverted into AC power for the load.

[0045] In summary, the small wind turbine of this invention, through its reasonable structural design, achieves advantages such as high wind energy utilization, usability in light winds, stable and reliable structure, low noise, and easy installation and maintenance. It can provide clean and sustainable electrical energy and can be used not only for household power supply but also for outdoor camping, power supply for communication base stations in remote areas, and other scenarios, showing broad application prospects.

[0046] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A small wind turbine generator, comprising a wind turbine assembly (100), a wind turbine frame (200), a generator (300), and an electrical control box (400), characterized in that: The fan assembly (100) includes a cone (101) and a fan shaft (103). The cone (101) is configured to split and guide the airflow. The open end of the cone (101) is fixedly connected to a guide vane (102) for accelerating and further guiding the split and guided airflow. The fan main shaft (103) extends through both ends of the cone (101) and is fixedly connected to one end of the cone (101).

2. A small wind generator as claimed in claim 1, characterized in that: The cone (101) is constructed as a semi-spindle streamlined shape with one end pointed and the other end rounded and wide, with a cone tail end (104) and a rounded cone opening end (105).

3. A small wind generator according to claim 2, characterized in that: There are multiple wind guide blades (102), and the multiple wind guide blades (102) are arranged at intervals along the circumferential direction of the cone opening end (105).

4. A small wind generator according to claim 3, characterized in that: Along the circumferential direction of the cone opening end (105), the diameter of the arc-shaped cross section of the guide vane (102) gradually expands from the smallest diameter air inlet (1022) to the largest diameter air outlet (1021).

5. A small wind generator as claimed in claim 1, characterized in that: The wind turbine frame (200) includes a U-shaped frame (201), a bracket (202), a generator support plate (203), and a diagonal brace (204). The wind turbine main shaft (103) is rotatably connected to the two side arms of the U-shaped frame (201) through bearings. One end of the generator support plate (203) is fixedly connected to the middle of the side arm of the U-shaped frame (201) near the tail end (104) of the cone. The diagonal brace (204) is inclinedly supported between the lower surface of the generator support plate (203) and the side arm of the U-shaped frame (201). A generator (300) is placed on the generator support plate (203). The input end rotation shaft of the generator (300) is fixedly connected to the end of the wind turbine main shaft (103) near the tail end (104) of the cone.

6. A small wind generator according to claim 5, characterized in that: The bottom surface of the U-shaped frame (201) is rotatably connected to the upper end of the support (202) at one-fifth of the distance from the tail end (104) of the cone to the opening end (105) of the cone via a rotating bearing (207).

7. A small wind generator according to claim 6, characterized in that: The lower end of the bracket (202) is fixedly connected to the electrical control box (400) via a fixed flange (208).

8. A small wind generator according to claim 7, characterized in that: The top of the bracket (202) is provided with a hollow shaft type standard slip ring.

9. A small wind generator according to claim 8, characterized in that: The diagonal brace (204), U-shaped frame (201) and bracket (202) are all hollow structures, forming cable channels inside. The internal output cable of the generator (300) passes through the internal cavities of the generator support plate (203), diagonal brace (204), U-shaped frame (201) and bracket (202) in sequence and is electrically connected to the electrical control box (400).

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