A vertical axis sail-type wind turbine structure

Abstract

This invention relates to the field of wind power generation technology, specifically disclosing a novel vertical axis wind turbine structure, including: a main shaft, a support frame, and wind-catching canvas blades. The wind-catching canvas blades are connected to the main shaft via a frame. When there is wind, the rear of the sail inflates in the direction of the wind, generating a force perpendicular to the support frame, driving the entire turbine to rotate in a fixed direction. This avoids the potential negative torque generated on the back of the blades of the vertical axis wind turbine, improving the efficiency of wind power conversion to electricity. Because the sail blades use soft, lightweight sail material, the overall weight of the generator structure is significantly reduced, enabling startup at extremely low wind speeds, while also significantly reducing the overall material cost of the turbine. Noise is generated when a single sail changes its inflating direction; this noise is reduced by using multiple thickened narrow strips of canvas sewn together.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a novel vertical axis wind turbine structure. Background Technology

[0002] Vertical axis wind turbines are mainly divided into two categories based on their working principle: drag-type and lift-type. Generators each have their own characteristics in terms of structure, performance, and application environment: I. Drag-type wind turbines primarily utilize the resistance generated when air flows over the blades to drive the rotor's rotation. Wind turbine blades are often designed with asymmetry to generate different drag levels when facing the wind, thus forming a... A torque around a central axis drives the wind turbine to rotate. Main types include: 1. Cup-type wind turbine: Its blades have a special shape, with the windward side larger than the leeward side. When the wind blows, the resistance experienced on the windward side is greater than that on the leeward side. The wind turbine generates a rotational torque by rotating on the surface. This type of wind turbine has a simple structure and a large starting torque, but its wind energy utilization efficiency is relatively low.

[0003] 2. Barrier-type flat-plate wind turbine: A windbreak barrier is installed on one side of the rotor, causing the wind to flow around the barrier and creating an asymmetrical effect on the blades. The thrust of the wind turbine drives the rotor to rotate. This type of wind turbine requires a rotatable barrier to adapt to changes in wind direction.

[0004] 3. Flat-plate oscillating wind turbine: The blades can rotate around the blade axis, and there are baffles to limit the rotation angle. When the wind blows towards the rotor blades, The lower blades rotate under the force of the wind and receive continuous thrust, causing the rotor to spin. This type of wind turbine can rotate even at lower wind speeds and is relatively efficient. Relatively high.

[0005] II. Lift-type vertical axis wind turbines primarily utilize the lift generated when air flows over the blades to drive the rotor's rotation. The blades of generators are mostly airfoil-shaped, which can capture wind energy more effectively.

[0006] The main types include: 1. Darrieux wind turbine: Invented by the Frenchman G.J.M. Darrieux in the 1830s, and extensively researched in the 1970s. The blades are arranged in an arc shape, resulting in a lower starting torque but a higher tip speed ratio, enabling it to provide high efficiency for a given rotor weight and cost. Power output. This type of wind turbine comes in various variants, such as Φ type, Δ type, Y type, and H type.

[0007] 2. Magnus Effect Wind Turbine: Composed of spinning cylinders, the magnus effect generates a propulsive force when the cylinders move through the airflow. Caused by the Grenus effect, its magnitude is proportional to wind speed. This type of wind turbine has a unique working principle and application scenarios.

[0008] Vertical axis wind turbines have certain advantages in converting wind energy into electricity, but they also have some drawbacks. Some notable drawbacks are as follows: 1. Poor starting performance: Compared to horizontal axis wind turbines, vertical axis wind turbines have poor starting performance. Generally poor. This is mainly because its blade design and wind capture efficiency are not ideal under certain wind speed conditions, resulting in... It is difficult to start up or reach a stable operating state at low wind speeds.

[0009] 2. Low output efficiency: During blade rotation, negative output efficiency may occur at certain locations of the vertical axis wind turbine. Torque affects the overall output efficiency of the wind turbine. Furthermore, its wind energy conversion efficiency is relatively low, partly due to the blade design not fully utilizing torque. Using wind energy from all directions leads to energy loss.

[0010] 3. Vibration Resistance: Vertical axis wind turbines, especially large units, face significant vibration resistance issues. The wind's... Stability and the structural characteristics of the unit itself may lead to increased vibration, affecting the stability and service life of the equipment.

[0011] 4. Large output power fluctuations: Due to the real-time variability and uncertainty of wind power, the output power of vertical axis wind turbines fluctuates significantly. Power output is prone to fluctuations. This instability poses challenges for wind power generation when connected to the grid, requiring additional measures. This stabilizes the output power to ensure the stable operation of the power grid.

[0012] 5. High manufacturing, transportation, and installation costs: The manufacturing cost of vertical axis wind turbines is relatively high. This is mainly due to their complex structure and numerous components. Numerous and heavy rigid materials are used. Larger wind turbines require specialized transport vehicles for transportation and installation, further increasing costs.

[0013] 6. High maintenance costs: Vertical axis wind turbines have relatively high maintenance costs. This is mainly due to their complex structure. The fan is complex, has many components, and is susceptible to environmental factors. To ensure the normal operation of the fan and extend its service life, regular maintenance and inspection are required.

[0014] In summary, vertical axis wind turbines face challenges such as poor starting performance, low output efficiency, vibration resistance, and difficulties in manufacturing, transportation, and installation. Vertical axis wind turbines suffer from drawbacks such as high cost, large output power fluctuations, and high maintenance costs. These factors limit their application in the wind power generation field. The potential for future development requires technological improvements and innovations to address these shortcomings in order to enhance the overall performance of vertical axis wind turbines. Economic benefits. Therefore, I propose a novel vertical axis wind turbine structure. Summary of the Invention

[0015] The purpose of this invention is to provide a novel vertical axis wind turbine structure to solve the problems mentioned in the background art, such as the limitations of wind turbines at lower wind speeds. Vertical axis wind turbines are more difficult to start under unstable wind conditions. During rotation, the blades of a vertical axis wind turbine are on their backs. The surface may generate negative torque, resulting in low overall power output efficiency of the fan and high overall weight and cost.

[0016] To achieve the above objectives, the present invention provides the following technical solution: a novel vertical axis wind turbine structure, comprising: a main shaft, connecting... The mast, connecting rod, connects to the sail frame, and the sail blades are arranged on the sail frame; it also includes: sail blades, the structural composition of the sail blades, and wind... The length-to-width ratio of the sail blades, and the segmentation method of stitching the sail blades into different areas to achieve a silent effect.

[0017] The present invention has at least the following beneficial effects: To reduce the overall cost and weight of the wind turbine, the sail should simultaneously have the maximum torque in the same direction of rotation at positions forward and backward from the wind direction. It starts easier at low wind speeds and is more efficient after starting. By rotating the sail to different positions and utilizing wind force, the resulting shape lowers the blade back surface... The negative torque generated by the surface improves the overall output efficiency of the fan. The modular design facilitates manufacturing, transportation, and installation, resulting in low maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following descriptions of the embodiments or the prior art will be used to further explain the technical solutions. The accompanying drawings used will be briefly described. Obviously, the drawings described below are only some embodiments of the present invention, and are not applicable to those skilled in the art. For skilled technicians, other diagrams can be obtained based on the structures shown in these diagrams without requiring any creative effort.

[0019] Figure 1 is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 is a partial three-dimensional schematic diagram of the structure of a single sail blade of the present invention under wind force; Figure 3 is a three-dimensional cross-sectional view of a partial layer of the component of the present invention; Figure 4 is a partial top cross-sectional view of the structure of the parallel connection of two sail blades on a single connecting rod of the present invention; Figure 5 is a three-dimensional schematic diagram of the complete structure of one layer of the present invention; Figure 6 is a three-dimensional schematic diagram of the three-layer cascaded structure of the present invention from a bottom view; Figure 7 is a schematic diagram of the structure of the sail blade of the present invention.

[0020] The components include: 1. Wind turbine base; 2. Motor; 3. Main shaft; 4. Connecting rod; 5. Sail blade frame; and 6. Sail blade. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, The described embodiments are merely some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, those skilled in the art... All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] Example 1 0023 Please refer to Figures 1 to 7. The present invention provides a technical solution: a novel vertical axis wind turbine structure, comprising: a wind turbine base. (1); Motor (2); Main shaft (3); Main shaft connects to 5 connecting rods (4); Each connecting rod fixes two sail blade frames (5); Sail blades (6); Three Layers with the same structure are connected in series to form a complete structure.

[0023] It also includes: a sail blade stitching structure, wherein the small piece of canvas (7) shown in Figure 7 is stitched together with the rectangular canvas (8) cut along the middle dotted line. Small canvases have a fixed aspect ratio, and rectangular canvases have a fixed length-to-width ratio to achieve optimal wind-catching performance. Different sizes of canvas can be used... By dividing the fabric into multiple sections and sewing them together, the local tension of the canvas is changed, thus achieving a noise reduction effect.

[0024] It should be noted that in this article, relational terms such as "first" and "second" are only used to connect one entity or operation with another. Distinguishing between entities or operations does not necessarily require or imply any such actual relationship or order between them.

[0025] Furthermore, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, thereby including a range of elements. The process, method, article, or equipment includes not only those elements, but also other elements not explicitly listed, or elements used for... The inherent elements of such a process, method, item, or device.

[0026] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any use of the information contained in the specification and drawings of this invention is prohibited. Equivalent structural or procedural transformations made to the content, or direct or indirect applications in other related technical fields, are similarly included in the scope of this invention. Within the scope of protection.

Claims

1. A novel vertical axis sail-type wind turbine structure, comprising: Wind turbine base (1); Motor (2); Main shaft (3); connecting rod (4); sail blade frame (5); Sail blades (6).

2. The vertical axis wind power generation device as described in claim 1, characterized in that: Five struts are connected to the main shaft, and each strut is connected to two sail frames. The complete individual structures on the three main shafts are connected in series to form a complete structure.

3. Connection method between a single connecting rod and two sail frames: For sail frames where the vertical axis is connected to the connecting rod, the angle between the vertical axis and the support rod is 90 degrees; for sail frames where the vertical axis is not connected to the connecting rod, the line connecting the vertical axis and the main shaft forms a 90-degree angle with the sail frame.

4. The structural composition of a single sail blade, characterized by: Cut a rectangular canvas in the middle and sew it together with a smaller canvas on the left side, which has an arc-shaped long side, to form a shape that can be inflated by the wind.

5. The method for noise reduction of sail blades as described in claim 4, characterized in that: The sail blades are cut into multiple small parts according to the different tensions of different materials, and then sewn together to form a silent sail.

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