Flexible composite blade of vertical axis wind turbine

Abstract

The invention relates to the technical field of wind power generation, in particular to a flexible composite blade of a vertical axis wind turbine, which comprises a stand column, a mounting groove, a servo motor, a rotating seat, a fixing frame and a flexible assembly, the mounting groove is formed in the top of the stand column, and the servo motor is fixedly connected to the inner bottom wall of the mounting groove; the top of the servo motor is fixedly connected with a rotating seat, the top of the rotating seat is fixedly connected with a fixing frame, the surface of the fixing frame is fixedly connected with a flexible assembly, the flexible assembly comprises a fan blade fixedly connected to the surface of the fixing frame, and a cavity is formed in the fan blade; the two sides of the inner wall of the cavity are fixedly connected with sound insulation damping layers. By arranging the flexible assembly, bending deformation can be generated under the impact of strong wind, the peak stress borne by the blade is reduced, the blade bears alternating loads without cracks, aerodynamic noise generated when the blade rotates can be absorbed, the noise decibel is reduced, and the noise control requirement of an urban area is met.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a flexible composite blade for a vertical axis wind turbine. Background Technology

[0002] With the increasing global demand for clean energy, wind power has received widespread attention as an important renewable energy source. Vertical axis wind turbines offer advantages such as insensitivity to wind direction and ease of installation and maintenance; however, their blades face numerous challenges in practical applications. Therefore, there is an urgent need to design vertical axis wind turbine blades that can improve blade fatigue resistance and reduce noise.

[0003] The existing device is made of rigid materials, which have poor fatigue resistance and are prone to cracks or even breakage during long-term operation; the blade shape of the existing device is fixed and cannot be adjusted according to wind speed, resulting in high noise and low energy capture efficiency at high wind speeds. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of poor fatigue resistance and poor wind speed adaptability of existing devices, and to propose a flexible composite blade for a vertical axis wind turbine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flexible composite blade for a vertical axis wind turbine, comprising a column, a mounting slot, a servo motor, a rotating base, a fixing frame, and a flexible component. The top of the column has a mounting slot, the inner bottom wall of the mounting slot is fixedly connected to a servo motor, the top of the servo motor is fixedly connected to a rotating base, the top of the rotating base is fixedly connected to a fixing frame, and the surface of the fixing frame is fixedly connected to a flexible component. The flexible component includes a blade fixedly connected to the surface of the fixing frame, the blade has a cavity inside, and the two sides of the inner wall of the cavity are fixedly connected to a sound-insulating damping layer.

[0006] Furthermore, glass fiber is fixedly connected between the two sound insulation damping layers, and the fan blade is made of silicone rubber.

[0007] Furthermore, the surface of the fan blade is coated with a hydrophobic coating, and turbulence protrusions are fixedly connected to the surface of the fan blade.

[0008] Furthermore, an adjustment assembly is rotatably connected to both sides of the fan blade, and the adjustment assembly includes inserts on both sides of the fan blade.

[0009] Furthermore, a slot is formed in the inner bottom wall of the insert, and a motor is fixedly connected to the inner bottom wall of the slot.

[0010] Furthermore, a rotating component is rotatably connected to the inner wall of the insert, and the top of the motor is fixedly connected to the bottom of the rotating component.

[0011] Furthermore, an adjusting fan is fixedly connected to the surface of the rotating component, and a flexible structure is also fixedly connected inside the adjusting fan.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0013] 1. In this invention, by setting flexible components, the silicone rubber fan blades have excellent elasticity and fatigue resistance. Under strong wind impact, they can bend and deform, reducing the peak stress on the blades and withstanding alternating loads without cracking. The sound insulation and damping layer in the cavity can absorb the aerodynamic noise generated when the blades rotate, reducing the noise level and meeting the noise control requirements of urban areas. Glass fiber, as a reinforcing skeleton, forms a composite structure with the silicone rubber matrix, which improves the tensile strength and bending stiffness of the blades while ensuring their flexibility. The hydrophobic coating can prevent rainwater and dew from accumulating on the blade surface, avoiding icing and ensuring normal operation of the blades in low-temperature environments. The turbulence protrusions can optimize the airflow distribution on the blade surface and improve the wind energy utilization coefficient.

[0014] 2. In this invention, by setting an adjustment component, the motor drives the rotating component to rotate the adjustment fan. The angle of the adjustment fan can be adjusted in real time according to the wind speed. At low wind speeds, the adjustment fan unfolds to be parallel to the fan blades, increasing the windward area and improving the starting performance. At high wind speeds, the adjustment fan rotates to be perpendicular to the fan blades, limiting the blade speed through aerodynamic damping effect to prevent overspeed operation. The flexible structure inside the adjustment fan allows it to produce a small oscillation at high wind speeds, further buffering the airflow impact and reducing blade vibration. This adjustment component maintains efficient and stable operation across the entire wind speed range, while reducing mechanical wear caused by sudden changes in speed and extending the blade maintenance cycle. Attached Figure Description

[0015] Figure 1 A three-dimensional front view of a flexible composite blade for a vertical axis wind turbine is provided for this invention.

[0016] Figure 2 This invention provides an exploded structural diagram of a flexible composite blade for a vertical axis wind turbine.

[0017] Figure 3 This invention provides a schematic diagram of the structure of the adjustment component in the flexible composite blade of a vertical axis wind turbine.

[0018] Figure 4 This invention provides a schematic diagram of the structure of the adjustment component in the flexible composite blade of a vertical axis wind turbine.

[0019] Figure 5 This invention presents a schematic diagram of the flexible component in the flexible composite blade of a vertical axis wind turbine.

[0020] Legend:

[0021] 1. Column; 2. Mounting slot; 3. Servo motor; 4. Rotary base; 5. Fixing frame; 6. Flexible component; 61. Fan blade; 62. Cavity; 63. Sound insulation and damping layer; 64. Fiberglass; 65. Turbine protrusion; 7. Adjustment component; 71. Insert; 72. Motor; 73. Rotating component; 74. Adjustable fan. Detailed Implementation

[0022] Please see Figure 1-5 The present invention provides a technical solution: a flexible composite blade for a vertical axis wind turbine, comprising a column 1, a mounting slot 2, a servo motor 3, a rotating base 4, a fixing frame 5, and a flexible component 6. The top of the column 1 is provided with a mounting slot 2, the inner bottom wall of the mounting slot 2 is fixedly connected to the servo motor 3, the top of the servo motor 3 is fixedly connected to the rotating base 4, the top of the rotating base 4 is fixedly connected to the fixing frame 5, and the surface of the fixing frame 5 is fixedly connected to the flexible component 6.

[0023] The specific settings and functions of its flexible component 6 and adjustment component 7 will be discussed below.

[0024] In this embodiment: the flexible component 6 includes a fan blade 61 fixedly connected to the surface of the fixing frame 5, the inside of the fan blade 61 is provided with a cavity 62, and the two sides of the inner wall of the cavity 62 are fixedly connected with a sound insulation damping layer 63.

[0025] The effects achieved by the above components are as follows: by setting the cavity 62 inside the fan blade 61, the overall weight of the blade is reduced, and the sound insulation damping layer 63 can absorb the vibration energy when the blade rotates, thereby reducing structural noise.

[0026] Specifically, glass fiber 64 is fixedly connected between the two sound insulation damping layers 63, and the fan blade 61 is made of silicone rubber.

[0027] The effect achieved by the above components is as follows: by setting glass fiber 64 as a reinforcement, a composite structure is formed with silicone rubber material, which improves the strength and stiffness of the blade, so that the blade maintains structural stability when it undergoes flexible deformation, and the silicone rubber material gives the blade good elasticity and weather resistance.

[0028] Specifically, the surface of the fan blade 61 is coated with a hydrophobic coating, and the surface of the fan blade 61 is fixedly connected with turbulence protrusions 65.

[0029] The effects achieved by the above components are as follows: by setting a hydrophobic coating, the blade surface has a self-cleaning ability, reducing the adhesion of rainwater and dew, avoiding icing that affects blade operation, and the turbulence protrusion 65 optimizes the airflow field on the blade surface, reduces air resistance, and improves wind energy capture efficiency.

[0030] Specifically, the fan blade 61 is rotatably connected to both sides of the adjusting assembly 7, which includes inserts 71 on both sides of the fan blade 61.

[0031] The effect achieved by the above components is as follows: by setting the insert 71 to provide an installation base for the adjustment component 7, the adjustment fan 74 can be rotatably connected to both sides of the fan blade 61, thereby realizing the adjustment of the aerodynamic characteristics of the blade.

[0032] Specifically, the inner bottom wall of the insert 71 has a slot, and the inner bottom wall of the slot is fixedly connected to the motor 72.

[0033] The effect achieved by the above components is that by setting the motor 72 to provide power for the rotation of the regulating fan 74, the angle of the regulating fan 74 can be controlled in real time according to the wind speed signal, so as to realize the adaptive adjustment of the blades.

[0034] Specifically, the inner wall of the insert 71 is rotatably connected to a rotating component 73, and the top of the motor 72 is fixedly connected to the bottom of the rotating component 73.

[0035] The effect achieved by the above components is as follows: by setting the motor 72 to drive the rotating component 73 to rotate inside the insert 71, the adjusting fan 74 is rotated, thereby achieving precise control of the angle between the adjusting fan 74 and the fan blade 61 and improving the angle adjustment accuracy.

[0036] Specifically, the surface of the rotating part 73 is fixedly connected to the regulating fan 74, and the interior of the regulating fan 74 is also fixedly connected to a flexible structure.

[0037] The effects achieved by the above components are as follows: by setting the regulating fan 74 to rotate with the rotating component 73, the frontal area of ​​the blades is increased at low wind speeds to improve starting performance, and aerodynamic damping is generated at high wind speeds to limit the blade speed. Its internal flexible structure can buffer the airflow impact, reduce vibration, and extend the service life of the blades.

[0038] Working principle: By setting up flexible component 6, the silicone rubber blade 61 has excellent elasticity and fatigue resistance. It can bend under strong wind impact, reduce the peak stress on the blade, and withstand alternating loads without cracking. The sound insulation damping layer 63 in the cavity 62 can absorb the aerodynamic noise generated when the blade rotates, reduce the noise level, and meet the noise control requirements of urban areas. Glass fiber 64 serves as a reinforcing skeleton and forms a composite structure with the silicone rubber matrix. While ensuring the flexibility of the blade, it can improve the tensile strength and bending stiffness of the blade. The hydrophobic coating can prevent rainwater and dew from accumulating on the blade surface, avoid icing, and ensure that the blade can operate normally in low-temperature environments. The turbulence protrusions 65 can optimize the airflow distribution on the blade surface and improve the wind energy utilization coefficient.

[0039] By setting the adjustment component 7, the motor 72 drives the rotating component 73 to rotate the regulating fan 74. The angle of the regulating fan 74 can be adjusted in real time according to the wind speed. At low wind speeds, the regulating fan 74 unfolds to be parallel to the fan blades 61, increasing the frontal area and improving starting performance. At high wind speeds, the regulating fan 74 rotates to be perpendicular to the fan blades 61, limiting the blade speed through aerodynamic damping effect to prevent overspeed operation. The flexible structure inside the regulating fan 74 allows it to produce a small oscillation at high wind speeds, further buffering the airflow impact and reducing blade vibration. The adjustment component 7 maintains efficient and stable operation across the entire wind speed range, while reducing mechanical wear caused by sudden changes in speed and extending the blade maintenance cycle.

Claims

1. A flexible composite blade for a vertical axis wind turbine, comprising a column (1), a mounting slot (2), a servo motor (3), a swivel (4), a fixing frame (5), and a flexible component (6), characterized in that: The top of the column (1) is provided with a mounting groove (2), the inner bottom wall of the mounting groove (2) is fixedly connected with a servo motor (3), the top of the servo motor (3) is fixedly connected with a rotating seat (4), the top of the rotating seat (4) is fixedly connected with a fixing frame (5), and the surface of the fixing frame (5) is fixedly connected with a flexible component (6). The flexible component (6) includes a fan blade (61) fixedly connected to the surface of the fixed frame (5). The fan blade (61) has a cavity (62) inside, and a sound insulation damping layer (63) is fixedly connected to both sides of the inner wall of the cavity (62).

2. The flexible composite blade of a vertical axis wind turbine according to claim 1, characterized in that: Glass fiber (64) is fixedly connected between the two sound insulation damping layers (63), and the fan blade (61) is made of silicone rubber.

3. The flexible composite blade of a vertical axis wind turbine according to claim 1, characterized in that: The surface of the fan blade (61) is coated with a hydrophobic coating, and the surface of the fan blade (61) is fixedly connected with a turbulence protrusion (65).

4. The flexible composite blade of a vertical axis wind turbine according to claim 1, characterized in that: The fan blade (61) is rotatably connected to both sides of an adjustment assembly (7), which includes inserts (71) on both sides of the fan blade (61).

5. The flexible composite blade of a vertical axis wind turbine according to claim 4, characterized in that: The inner bottom wall of the insert (71) is provided with a slot, and a motor (72) is fixedly connected to the inner bottom wall of the slot.

6. A flexible composite blade for a vertical axis wind turbine according to claim 4 or 5, characterized in that: The inner wall of the insert (71) is rotatably connected to a rotating component (73), and the top of the motor (72) is fixedly connected to the bottom of the rotating component (73).

7. The flexible composite blade of a vertical axis wind turbine according to claim 6, characterized in that: The surface of the rotating component (73) is fixedly connected to an adjusting fan (74), and the interior of the adjusting fan (74) is also fixedly connected to a flexible structure.

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