Vertical-axis double-rotor wind driven generator capable of adapting to wind direction

Abstract

Savonius type impellers are adopted, the Savonius type impellers comprise an upper layer of semi-cylindrical impellers and a lower layer of semi-cylindrical impellers which are the same in size, the semi-cylindrical impellers are arranged on an upper vertical shaft and a lower vertical shaft in a staggered mode, and the opening directions of the two impellers are opposite. And a power generation device is mounted in the middle of the impeller. The upper-layer impeller drives the power generation coil to rotate anticlockwise, the lower-layer impeller drives the permanent magnet to rotate clockwise, and the power generation efficiency and the wind energy utilization rate are improved through cooperation of the two. In addition, the generator is provided with a tail vane plate and a tail vane rod, the horizontal automatic wind facing function is achieved, and the power generation efficiency and the wind energy utilization rate are effectively improved. And meanwhile, the independently separated S-shaped impeller shape is also beneficial to improving the power generation efficiency and stability.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, in particular to a vertical-axis dual-rotor wind power generator capable of adapting to wind direction. Background Art

[0002] Vertical axis wind turbines are very suitable for use as small wind power generation devices due to their adaptability to different wind directions, simple structure, reliable operation, and easy installation and maintenance.

[0003] However, existing resistance-type vertical axis wind turbines have disadvantages such as poor starting performance, low wind energy utilization, and insufficient ability to resist strong winds, which limits their promotion and application in practical applications.

[0004] To this end, the present invention provides a vertical-axis dual-rotor wind turbine that can adapt to wind direction. Summary of the Invention

[0005] The purpose of the present invention is to provide a vertical axis dual-rotor wind turbine that can adapt to wind direction and solve the problems mentioned in the background art.

[0006] To address the above issues, the present invention provides the following technical solution: a vertical-axis dual-rotor wind turbine capable of adapting to wind direction, comprising upper and lower vertical shafts arranged perpendicular to the horizontal plane. Impellers are positioned around the vertical shafts, capable of driving their rotation. The impellers are fixedly connected to the vertical shafts via end plates, thereby driving their rotation. The impellers are generally cylindrical, consisting of upper and lower layers of equal height. Each layer utilizes vertically mounted semi-cylindrical impellers made of the same material and dimensions. The windward side of the impellers adopts a SIN2 shape, while the leeward side adopts a perfect semicircular shape.

[0007] Furthermore, the upper impeller is fixedly connected to the upper end plate, which is in turn fixedly connected to the upper vertical shaft. The upper vertical shaft passes through the center of the upper impeller without touching the upper impeller. Similarly, the lower impeller is fixedly connected to the lower end plate, which is in turn fixedly connected to the lower vertical shaft. The lower vertical shaft passes through the center of the lower impeller without touching the lower impeller. Furthermore, each layer of impellers is vertically installed and evenly arranged, and the positions of the upper and lower impellers are evenly staggered. Furthermore, the openings of the upper and lower impellers face opposite directions. The vertical projection of the impellers on the same layer on the disk is two evenly distributed equal semicircular arcs, while the vertical projection of the impellers on the upper and lower layers on the same disk is four evenly distributed equal semicircular arcs. The diameter of the circle where the semi-cylindrical impeller is located is slightly larger than the radius of the disk, so that an interconnected airflow channel is formed inside each layer of the impeller.

[0008] Furthermore, a power generation device is installed between the upper and lower impellers, which consists of six permanent magnets and a coil. The six permanent magnets are fixedly connected to the lower rotating shaft through the lower end plate, and the power generation coil is fixedly connected to the upper rotating shaft.

[0009] Furthermore, the SIN2-shaped blade surface is an impeller model that can maximize the power generation efficiency obtained by using MATLAB to perform mathematical model calculations. The mathematical model is an image obtained by adding three sinusoidal functions with different coefficients, and then the mathematical model is reasonably arranged symmetrically around the origin to obtain the SIN2-shaped blade surface.

[0010] Furthermore, a support column is installed at the bottom of the main engine, connected to an external wind-control system. This wind-control system is an auxiliary system based on a fan-shaped barrier and a tail rudder. It consists of a fan-shaped barrier, a barrier bracket, a tail rudder plate, a tail rudder crossbar, and a bottom support column. The barrier bracket is connected to a bearing on the top plate for free rotation, and the barrier bracket is connected to the barrier. The tail rudder plate, tail rudder crossbar, barrier bracket, and fan-shaped barrier form a lever structure.

[0011] Furthermore, the vertical projection of a set of fan-shaped barriers is two quarter circles, and the two quarter circles are symmetrically distributed. There are two sets of fan-shaped barriers in total: an upper set assisting the upper impellers, and a lower set assisting the lower impellers. The upper and lower sets of guide plates are connected by two connecting plates, and the upper and lower sets of impellers are staggered.

[0012] Furthermore, the rotation system of this device is divided into three parts. The first part is connected to bearing one inside the support column. Bearing one is connected to the lower vertical shaft. The lower vertical shaft, lower end plate, lower impeller, permanent magnet and bearing two are fixedly connected together, so they can all rotate freely through bearing one. The second part is connected to bearing two at the top of the lower end plate. Bearing two is connected to the upper vertical shaft. The upper vertical shaft, coil, upper end plate, upper impeller and bearing three are fixedly connected together, so they can all rotate freely through bearing two. The third part is connected to bearing three on the top plate. Bearing three is connected to the barrier bracket. The barrier bracket is fixedly connected to the wind system, so the entire wind system can rotate freely through bearing three. The above three rotation systems can rotate freely without affecting each other.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention discloses a vertical-axis, dual-rotor wind turbine capable of adapting to wind direction. The turbine comprises two rotors, both of which utilize Savonius-type impellers. During operation, the upper impeller rotates counterclockwise, driving the generator coils in counterclockwise rotation. The lower impeller rotates clockwise, driving the permanent magnets in clockwise rotation. Because the magnets and coils rotate in opposite directions, the theoretical relative speed for generating electricity is approximately twice that of a single-axis rotor, significantly improving power generation efficiency and increasing wind energy utilization.

[0015] 2. The present invention relates to a vertical-axis dual-rotor wind turbine that can adapt to wind direction. During use, the generator of the present invention can realize an automatic wind-facing function. The entire horizontal automatic wind-facing system adopts a tail rudder plate and a tail rudder rod design. In the design, the length of the tail rudder plate is much larger than the distance from the air inlet of the barrier to the rotating shaft, thereby forming a horizontally placed force-saving lever structure. In addition, the size of the tail rudder plate is relatively large, which ensures that the force of the wind on the tail rudder plate when facing the wind can keep the tail rudder plate parallel to the wind direction. Since the plane where the tail rudder plate is located is parallel to the plane where the actual wind direction is located, this also means that the plane where the air inlet of the barrier is located is roughly perpendicular to the wind direction, thereby realizing the horizontal automatic wind-facing function of the system. Based on the relevant principles of solid geometry, this design enables the system to effectively face the wind, thereby significantly improving the power generation efficiency and improving the utilization rate of wind energy.

[0016] 3. The present invention describes a vertical-axis dual-rotor wind turbine capable of adapting to wind direction. The present invention independently designs the concave and convex shapes of the S-shaped impeller. The windward side of the generator rotor adopts a SIN2 shape, which maximizes average power and provides stable torque. The leeward side adopts a perfect semicircular structure, which allows airflow acting on the rear impeller to flow sideways through the impeller, reducing resistance to the impeller. The combination of these two shapes creates a novel impeller structure that significantly improves power generation efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 Schematic diagram of the overall structure of the present invention Figure 2 Schematic diagram of the automatic wind control system of the present invention Figure 3 Schematic diagram of the shaft system of the present invention Figure 4 Schematic diagram of the impeller shape of the present invention In the figure: 1-bearing 1, 2-upper vertical shaft, 3-permanent magnet, 4-bearing 2, 5-lower vertical shaft, 6-lower end plate, 7-lower impeller, 8-support column, 9-tail rudder plate, 10-barrier bracket, 11-upper impeller, 12-upper guide plate, 13-upper end plate, 14-coil, 15-lower guide plate, 16-tail rudder rod, 17-connecting plate, 18-top plate, 19-bearing three, 20-SIN2 shaped blade surface, 21-semicircular blade surface. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the described embodiments represent only a part of the present invention, not all of it. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without innovative work are within the scope of protection of the present invention.

[0020] See also Figure 1 and Figure 4 Technical solution: A vertical axis double rotor wind turbine generator capable of adapting to wind direction, comprising an upper vertical axis (2) and a lower vertical axis (5) arranged perpendicular to a horizontal plane, wherein the upper vertical axis (2) is connected to a second bearing (4), and the lower vertical axis (5) is connected to a third bearing (19), so that the upper vertical axis (2) and the lower vertical axis (5) can move freely. The upper vertical axis (2) is fixedly connected to a coil (14), and the lower vertical axis (5) is fixedly connected to a lower end plate (6), which is in turn fixedly connected to six permanent magnets (3). When the generator is working, the upper and lower impellers rotate in opposite directions, and the theoretical relative speed is twice the speed of a single impeller, thereby greatly improving the power generation efficiency.

[0021] See also Figure 1 and Figure 2 The guide system is connected to the main engine through a bearing (1) on the top plate (18), so it can rotate freely in the horizontal direction. When the wind acts on the generator, the tail rudder plate (9) is subjected to the wind force, forming a horizontally placed force-saving lever structure, so that the generator can be horizontally facing the wind. The tail rudder plate (9) structure is a plate that crosses up and down, and a support column (8) is installed at the bottom of the generator. The entire system consists of four guide plates, which are projected into four arcs to form a perfect circle. The two upper guide plates (12) are connected by a barrier bracket (10), and the lower guide plate (15) is connected to the corresponding upper guide plate (12) by a connecting plate (17), thereby playing the role of guiding.

[0022] See also Figure 1 and Figure 3 When the generator is working, due to the different arc opening directions of the upper impeller (11) and the lower impeller (7), the upper impeller (11) rotates counterclockwise and the lower impeller (7) rotates clockwise. The impeller generally uses a Savonius type (S type) impeller, but the generator independently designs the shape of the impeller concave and convex surface. The windward side uses a SIN2-shaped blade surface (20) to maximize the power of wind power, and the leeward side uses a semicircular blade surface (21) to reduce air resistance. The impeller formed by the two blade shapes is combined to form a Savonius type (S type) impeller, which can greatly improve the power generation.

[0023] Working principle: When using the vertical axis twin-rotor wind turbine generator capable of adapting to wind direction, the generator is first roughly fixed by the support column (8). Then, when the wind acts on the generator, the guide system will quickly calibrate the wind direction. After the calibration is completed, the wind will act on the windward surface (concave surface) of the upper impeller (11) and the windward surface (concave surface) of the lower impeller (7). However, due to the shielding of the guide plate, the leeward surface (convex surface) of the two sets of impellers will not be affected by the wind. At this time, the generator starts to rotate and work. The upper impeller (11) drives the coil (14) to rotate counterclockwise, and the lower impeller (7) drives the six permanent magnets (3) to start rotating clockwise. At this time, the wind energy is converted into electrical energy by cutting the magnetic flux lines. In actual use, the length of the support column (8) and the length of the tail rudder rod (16) can be adjusted according to actual conditions. In this way, the use process of the vertical axis twin-rotor wind turbine generator capable of adapting to wind direction is completed.

[0024] Although the embodiments of the present invention have been illustrated and described, those skilled in the relevant art may make various changes, modifications, substitutions, and variations to these embodiments without violating the principles and core concepts of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical axis dual-rotor wind turbine capable of adapting to wind direction, characterized in that: include: An upper vertical shaft (2) and a lower vertical shaft (5) are arranged perpendicular to the horizontal plane, the upper vertical shaft (2) rotates by means of a second bearing (4) embedded in the lower end plate (6), and the upper vertical shaft (2) rotates by means of a third bearing (19) embedded in the support column (8); The upper vertical shaft (2) is fixedly connected to the upper end plate (13) and the upper impeller (11), and the lower vertical shaft (5) is fixedly connected to the lower end plate (6) and the lower impeller (7); Each layer of impellers consists of semi-cylindrical impellers of the same size, with a SIN2-shaped blade surface (20) on the windward side and a semi-circular blade surface (21) on the leeward side; The upper impeller (11) and the lower impeller (7) are installed vertically and staggered. The openings of the two impellers are oriented in opposite directions. A certain gap is left between the two impellers of each impeller group so that they are not connected. An upper vertical shaft (2) or a lower vertical shaft (5) passes through the gap between the two impellers of each group. The vertical shaft is not connected to the impellers and a certain gap is left between the impellers to serve as an air flow channel for communication. The upper vertical shaft (2) and the lower vertical shaft (5) are connected to the upper end plate (13) and the lower end plate (6), and the upper vertical shaft (2) is also connected to the top end plate (18); The power generation device is installed between the upper and lower impellers, and includes six permanent magnets (3) and a coil (14). The permanent magnets (3) are evenly distributed on the lower end plate (6) around the lower vertical shaft (5), and the coil (14) is fixedly connected to the upper vertical shaft (2). The auxiliary system is composed of an upper deflector plate (12), a lower deflector plate (15), a tail rudder plate (9), a screen bracket (10), a tail rudder rod (16), and a connecting plate (17). The entire auxiliary wind-facing system is connected to the bearing (1) through the screen bracket (10) and can move freely. The screen bracket (10) is composed of four metal rods, and the four metal rods are further connected to the deflector system. The upper guide plate (12) and the lower guide plate (15) are respectively formed by fan-shaped barriers to form two vertical projections of a quarter circle, and the upper guide plate (12) and the lower guide plate (15) are connected by two connecting plates (17); The upper end plate (13) is fixedly connected to the upper impeller (11), and the lower end plate (6) is fixedly connected to the lower impeller (7). The opening directions of the two groups of impellers are opposite, so the rotation directions are opposite; A support column (8) is installed at the bottom of the generator to fix and support the entire generator and keep it stable.

2. A vertical axis dual-rotor wind turbine capable of adapting to wind direction according to claim 1, characterized in that: The upper impeller (11) and the lower impeller (7) rotate in opposite directions when working, and the impellers are divided into two groups, each group is provided with two impellers, a total of four impellers, the impellers are vertically staggered and each impeller is tightly connected to each end plate.

3. The vertical-axis dual-rotor wind turbine capable of adapting to wind direction according to claim 1, characterized in that: The vertical projection of each impeller on the disk is two evenly distributed equal semicircular arcs. The windward and leeward sides of the impeller are designed separately. The windward side of the SIN2-shaped blade surface (20) can increase the power generation efficiency and the leeward side of the semicircular blade surface (21) can reduce the resistance, thereby improving the power generation efficiency and the stability of power generation.

4. The vertical-axis dual-rotor wind turbine capable of adapting to wind direction according to claim 1, characterized in that: The generator uses a guide plate to guide the flow, and the guide plate is affected by the tail rudder plate to face the wind direction, thus forming an automatic wind-facing system. This system enables the generator to efficiently utilize wind energy and adapt to different wind directions.

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