A fan blade with adjustable blade angle for surge reduction and low noise

Abstract

The present invention discloses a surge-reducing and low-noise wind turbine blade with adjustable blade angle, which relates to the technical field of wind turbine blades. It comprises a hub body, a connecting shaft is fixedly mounted on the hub body, the interior of the hub body is divided into a power supply chamber, a mounting chamber and a drive chamber, an adjustment component is provided inside the drive chamber, a wind turbine blade is mounted on the adjustment component, a blade tail is fixedly mounted on the tail of the wind turbine blade, the side edge of the wind turbine blade is set as a notch, a linkage component is provided inside the mounting chamber, and a guide component is provided on the linkage component. The invention concentrates the airflow by synchronously rotating the guide vanes with the wind turbine blades. This design can effectively improve the flow characteristics of the airflow on the blade surface, increase lift, and reduce noise. Combining the guide vanes with the blade angle adjustment mechanism enhances its adaptability and effectively improves the use effect of the wind turbine blades.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blades, in particular to a surge-reducing and low-noise wind turbine blade with adjustable blade angle. Background Art

[0002] A wind turbine generator consists of a rotor and a generator. The rotor includes blades, a hub, and reinforcements. The blades rotate in response to wind power, generating electricity and rotating the generator head. A wind turbine generator power source comprises the wind turbine, a tower supporting the turbine, a battery charge controller, an inverter, an unloader, a grid connection controller, and a battery pack. The wind turbine blades are an essential component of the wind turbine generator.

[0003] Most of the existing wind turbine blades are fixed on the hub. Since the fixed blades cannot be adjusted according to real-time changes in wind speed and wind direction, the aerodynamic efficiency under different working conditions is low. In addition, a single wind turbine blade cannot quickly capture wind energy, and the airflow in the air cannot be quickly concentrated on the wind turbine blade. Therefore, the present invention proposes a surge-reducing and low-noise wind turbine blade with adjustable blade angle to solve the above-mentioned problems. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a surge-reducing and low-noise fan blade with adjustable blade angle, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A surge-reducing and low-noise wind turbine blade with adjustable blade angle, comprising a hub body, a connecting shaft fixedly mounted on the hub body, the interior of the hub body being divided into a power supply chamber, a mounting chamber, and a drive chamber, an adjustment assembly being disposed within the drive chamber, a wind turbine blade being mounted on the adjustment assembly, a blade tail being fixedly mounted at the tail of the wind turbine blade, and a side edge of the wind turbine blade being configured as a notch;

[0007] A linkage assembly is provided inside the installation cavity, and a flow guide assembly is provided on the linkage assembly, so that the airflow is concentrated on the wind turbine blades through the flow guide assembly.

[0008] Preferably, the adjustment assembly includes a driving shaft rotatably mounted inside the driving cavity, a driving bevel gear is fixedly mounted on the driving shaft, a connecting shaft is rotatably connected to the inner side surface of the driving cavity, a driven bevel gear is fixedly mounted on one end of the connecting shaft, the other end of the connecting shaft passes through the hub body and is fixedly connected to the wind turbine blade, and the driving bevel gear is meshed with the driven bevel gear.

[0009] Preferably, a drive motor is fixedly installed inside the power cavity, and the end of the drive shaft away from the active bevel gear passes through the installation cavity and extends to the inside of the power cavity and is fixedly connected to the output end of the drive motor.

[0010] Preferably, the linkage assembly includes a polygonal cam fixedly mounted on the driving shaft and an arc-shaped top block slidably connected to the inside of the mounting cavity, a locating bearing fixedly mounted on the arc-shaped top block, a spiral rod fixedly mounted on the locating bearing, the end of the spiral rod away from the locating bearing passes through the hub body and is fixedly mounted with a mounting plate.

[0011] Preferably, a return spring is fixedly mounted on the arc-shaped top block, and one end of the return spring away from the arc-shaped top block is fixedly connected to the inside of the mounting cavity. The return spring is located outside the spiral rod, and the spiral rod is movably connected to the hub body.

[0012] Preferably, the guide assembly includes mounting grooves arranged on the two end surfaces of the mounting plate, the guide blades are rotatably connected inside the mounting grooves, the inner edges of the guide blades are provided with guide slopes, and a connecting tension spring is fixedly connected between the two guide blades.

[0013] Preferably, an electric push rod is fixedly mounted on the mounting plate, an output shaft of the electric push rod is fixedly connected to an adjusting arc block, and the inner sides of the two guide blades are fixedly mounted with tilting blocks, and the adjusting arc block is slidably connected to the tilting block.

[0014] Preferably, there are multiple notches arranged in an array, and the front surface of the hub body is configured as an arc surface.

[0015] The present invention provides a surge-reducing, low-noise fan blade with adjustable blade angle. Compared with the prior art, it has the following advantages:

[0016] 1. The present invention can reduce the noise generated when the airflow cuts the blade edge by the notch on the wind turbine blade. At the same time, the motor drives the driving shaft to rotate, and the driving bevel gear on the driving shaft and the driven bevel gear on the connecting shaft are used in conjunction with each other. The connecting shaft is used to adjust the angle of the wind turbine blade, thereby adjusting the windward angle of the wind turbine blade, optimizing its performance under different wind speeds and wind directions, and enhancing the adaptability of the generator blades to different environmental conditions.

[0017] 2. In the present invention, the two guide blades rotate synchronously with the wind turbine blades, and the guide slopes on the two guide blades are used to concentrate the airflow on the wind turbine blades. The electric push rod drives the arc block to rise and fall, and the tilting block can be used to adjust the opening of the two guide blades, effectively improving the flow characteristics of the airflow on the blade surface, increasing lift, and reducing noise, thereby improving the use effect of the wind turbine blades.

[0018] 3. In the present invention, when the driving shaft rotates, the driving shaft will synchronously drive the polygonal cam to rotate. When the polygonal cam rotates, the arc-shaped top block will be lifted up. When the arc-shaped top block is lifted up, it will drive the screw rod to rotate through the positioning bearing. When the screw rod rotates, it will adjust the angle of the guide blade through the installation plate to ensure that the angle of the guide blade is the same as the angle of the wind turbine blade, ensuring that the guide blade effectively guides the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a front view of the present invention;

[0021] Figure 3 1 is a cross-sectional view of the hub body of the present invention;

[0022] Figure 4 Schematic diagram of the internal structure of the hub body in the present invention Figure 1 ;

[0023] Figure 5 The cross-sectional view of the hub body in the present invention Figure 2 ;

[0024] Figure 6 Schematic diagram of the internal structure of the hub body in the present invention Figure 2 ;

[0025] Figure 7 Schematic diagram of the structure of the polygonal cam in the present invention;

[0026] Figure 8 Schematic diagram of the structure of the guide vane in the present invention;

[0027] Figure 9 It is a structural schematic diagram of the arc-shaped top block in the present invention.

[0028] In the figure: 1. Hub body; 2. Connecting shaft; 3. Power cavity; 4. Mounting cavity; 5. Drive cavity; 6. Wind turbine blade; 7. Blade tail; 8. Notch; 9. Drive shaft; 10. Active bevel gear; 11. Connecting shaft; 12. Driven bevel gear; 13. Drive motor; 14. Polygonal cam; 15. Arc top block; 16. Positioning bearing; 17. Screw rod; 18. Mounting plate; 19. Return spring; 20. Mounting slot; 21. Guide blade; 22. Guide slope; 23. Connecting tension spring; 24. Electric push rod; 25. Adjusting arc block; 26. Tilting block; 27. Arc surface. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1:

[0031] See also Figure 1-9 The present invention is a surge-reducing and low-noise wind turbine blade with adjustable blade angle, comprising a hub body 1, wherein the front surface of the hub body 1 is configured as an arc surface 27, a connecting shaft 2 is fixedly mounted on the hub body 1, the interior of the hub body 1 is divided into a power supply cavity 3, a mounting cavity 4, and a drive cavity 5, an adjustment component is provided inside the drive cavity 5, a wind turbine blade 6 is mounted on the adjustment component, a blade tail 7 is fixedly mounted at the tail of the wind turbine blade 6, a side edge of the wind turbine blade 6 is configured as a notch 8, the number of the notches 8 is multiple, and they are arranged in an array, the multiple notches 8 can reduce the noise generated when the airflow cuts the blade edge, and at the same time improve the stability of the wind turbine under strong wind conditions, and reduce vibration and swing;

[0032] The adjustment component includes a driving shaft 9 rotatably installed inside the driving cavity 5, and a driving bevel gear 10 is fixedly installed on the driving shaft 9. The inner side surface of the driving cavity 5 is rotatably connected to a connecting shaft 11, and one end of the connecting shaft 11 is fixedly installed with a driven bevel gear 12. The other end of the connecting shaft 11 passes through the hub body 1 and is fixedly connected to the wind turbine blade 6. The driving bevel gear 10 is meshed with the driven bevel gear 12. A driving motor 13 is fixedly installed inside the power supply cavity 3. The end of the driving shaft 9 away from the driving bevel gear 10 passes through the mounting cavity 4 and extends to the interior of the power supply cavity 3, and is fixedly connected to the output end of the driving motor 13. An inclined through hole can be opened on the side surface of the hub body 1, and the power supply cavity 3 is connected to the outside world through the through hole. The inclined through hole is used to facilitate the removal of heat generated by the driving motor 13 to ensure the normal operation of the drive motor 13.

[0033] In this embodiment, the notch 8 on the wind turbine blade 6 can reduce the noise generated when the airflow cuts the blade edge. At the same time, the drive shaft 9 is driven to rotate by the motor, and the active bevel gear 10 on the drive shaft 9 and the driven bevel gear 12 on the connecting shaft 11 are used in conjunction with each other. The angle of the wind turbine blade 6 is adjusted through the connecting shaft 11, and then the windward angle of the wind turbine blade 6 is adjusted, thereby optimizing its performance under different wind speeds and wind directions, and enhancing the adaptability of the generator blades under different environmental conditions.

[0034] Example 2:

[0035] See also Figure 1-9On the basis of embodiment 1, a linkage component is provided inside the mounting cavity 4, and a guide component is provided on the linkage component. The airflow is concentrated on the wind turbine blade 6 through the guide component. The guide component includes a mounting groove 20 provided on the two end faces of the mounting plate 18. The guide blade 21 is rotatably connected to the inside of the mounting groove 20. The inner edge of the guide blade 21 is provided with a guide slope 22. A connecting spring 23 is fixedly connected between the two guide blades 21. The number of the connecting springs 23 can be installed according to the needs of personnel, and the position of the connecting spring 23 is installed at the top position of the two guide blades 21 to ensure that the connecting spring 23 can Pull the two guide blades 21 inward, and an electric push rod 24 is fixedly installed on the mounting plate 18. The output shaft of the electric push rod 24 is fixedly connected to the adjusting arc block 25. The inner sides of the two guide blades 21 are fixedly installed with tilting blocks 26. The adjusting arc block 25 is slidably connected to the tilting blocks 26. When the adjusting arc block 25 rises, the two guide blades 21 will be expanded outward through the tilting blocks 26. When the adjusting arc block 25 descends, the two tilting blocks 26 will rotate inward by the tension of the connecting tension spring 23. The friction between the adjusting arc block 25 and the tilting block 26 is small, ensuring that the adjusting arc block 25 can slide between the two tilting blocks 26.

[0036] In this embodiment, the two guide blades 21 rotate synchronously with the wind turbine blades 6, and the guide slopes 22 on the two guide blades 21 are used to facilitate the concentration of the airflow on the wind turbine blades 6. The electric push rod 24 drives the arc block 25 to rise and fall, and the tilting block 26 can be used to adjust the opening of the two guide blades 21, effectively improving the flow characteristics of the airflow on the blade surface, increasing lift, and reducing noise, thereby improving the use effect of the wind turbine blade 6.

[0037] Example 3:

[0038] See also Figure 1-9On the basis of the second embodiment, the linkage assembly includes a polygonal cam 14 fixedly mounted on the driving shaft 9 and an arc-shaped top block 15 slidably connected to the inside of the mounting cavity 4, a positioning bearing 16 is fixedly mounted on the arc-shaped top block 15, a screw rod 17 is fixedly mounted on the positioning bearing 16, the end of the screw rod 17 away from the positioning bearing 16 passes through the hub body 1 and is fixedly mounted with a mounting plate 18, a return spring 19 is fixedly mounted on the arc-shaped top block 15, and the end of the return spring 19 away from the arc-shaped top block 15 is fixedly connected to Inside the mounting cavity 4, the position of the reset spring 19 is on the outside of the spiral rod 17, and the spiral rod 17 is movably connected to the hub body 1, wherein the friction between the polygonal cam 14 and the arc-shaped top block 15 is small, and the inner side surface of the polygonal cam 14 is an arc-shaped surface, ensuring that when the polygonal cam 14 rotates, the arc-shaped top block 15 between the convex corners can utilize the limit of the mounting cavity 4 and be in an ascending state. At the same time, the friction between the mounting cavity 4 and the arc-shaped top block 15 is small, ensuring the stability of the arc-shaped top block 15 during lifting and lowering.

[0039] In this embodiment, when the driving shaft 9 rotates, the driving shaft 9 will synchronously drive the polygonal cam 14 to rotate. When the polygonal cam 14 rotates, the arc-shaped top block 15 will be lifted up. When the arc-shaped top block 15 is lifted up, it will drive the screw rod 17 to rotate through the positioning bearing 16. When the screw rod 17 rotates, it will adjust the angle of the guide blade 21 through the installation plate 18 to ensure that the angle of the guide blade 21 is the same as the angle of the wind turbine blade 6, thereby ensuring that the guide blade 21 effectively guides the airflow.

[0040] Working principle:

[0041] When in use, the notch 8 on the wind turbine blade 6 can reduce the noise generated when the airflow cuts the blade edge. At the same time, the motor drives the drive shaft 9 to rotate, and the active bevel gear 10 on the drive shaft 9 and the driven bevel gear 12 on the connecting shaft 11 are used in conjunction with each other. The connecting shaft 11 is used to adjust the angle of the wind turbine blade 6, and then the windward angle of the wind turbine blade 6 is adjusted, thereby optimizing its performance under different wind speeds and wind directions, and enhancing the adaptability of the generator blades to different environmental conditions.

[0042] The two guide blades 21 rotate synchronously with the wind turbine blades 6, and the guide slopes 22 on the two guide blades 21 are used to concentrate the airflow on the wind turbine blades 6. The electric push rod 24 drives the adjustment arc block 25 to rise and fall. When the adjustment arc block 25 rises, the two guide blades 21 will be spread outward through the tilting block 26. When the adjustment arc block 25 falls, the two tilting blocks 26 will be rotated inward by the tension of the connecting tension spring 23. The tilting block 26 can be used to adjust the opening of the two guide blades 21, effectively improving the flow characteristics of the airflow on the blade surface, increasing lift, and reducing noise, thereby improving the use effect of the wind turbine blade 6;

[0043] When the driving shaft 9 rotates, the driving shaft 9 will synchronously drive the polygonal cam 14 to rotate. When the polygonal cam 14 rotates, the arc-shaped top block 15 will be lifted up. When the arc-shaped top block 15 is lifted up, it will drive the screw rod 17 to rotate through the positioning bearing 16. When the screw rod 17 rotates, it will adjust the angle of the guide blade 21 through the installation plate 18 to ensure that the angle of the guide blade 21 is the same as the angle of the wind turbine blade 6, ensuring that the guide blade 21 effectively guides the airflow.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A surge-reducing and low-noise fan blade with adjustable blade angle, comprising a hub body (1), characterized in that: A connecting shaft (2) is fixedly mounted on the hub body (1); the interior of the hub body (1) is divided into a power supply chamber (3), a mounting chamber (4), and a drive chamber (5); an adjustment assembly is provided inside the drive chamber (5); a wind turbine blade (6) is mounted on the adjustment assembly; a blade tail (7) is fixedly mounted at the tail of the wind turbine blade (6); and a side edge of the wind turbine blade (6) is provided with a notch (8); A linkage assembly is provided inside the installation cavity (4), and a flow guide assembly is provided on the linkage assembly, so that the airflow is concentrated on the wind turbine blades (6); The adjustment assembly comprises a driving shaft (9) rotatably mounted inside a driving cavity (5), a driving bevel gear (10) being fixedly mounted on the driving shaft (9), a connecting shaft (11) being rotatably connected to the inner side surface of the driving cavity (5), a driven bevel gear (12) being fixedly mounted on one end of the connecting shaft (11), the other end of the connecting shaft (11) passing through the hub body (1) and being fixedly connected to the wind turbine blade (6), the driving bevel gear (10) being meshed with the driven bevel gear (12); The linkage assembly comprises a polygonal cam (14) fixedly mounted on the driving shaft (9) and an arc-shaped top block (15) slidably connected to the interior of the mounting cavity (4); a positioning bearing (16) is fixedly mounted on the arc-shaped top block (15); a spiral rod (17) is fixedly mounted on the positioning bearing (16); an end of the spiral rod (17) away from the positioning bearing (16) passes through the hub body (1) and is fixedly mounted with a mounting plate (18); a return spring (19) is fixedly mounted on the arc-shaped top block (15); an end of the return spring (19) away from the arc-shaped top block (15) is fixedly connected to the interior of the mounting cavity (4); the position of the return spring (19) is outside the spiral rod (17); and the spiral rod (17) is movably connected to the hub body (1); The guide assembly comprises a mounting groove (20) provided on two end surfaces of the mounting plate (18); a guide vane (21) is rotatably connected inside the mounting groove (20); an inner edge of the guide vane (21) is provided with a guide slope (22); a connecting tension spring (23) is fixedly connected between the two guide vanes (21); an electric push rod (24) is fixedly installed on the mounting plate (18); an output shaft of the electric push rod (24) is fixedly connected to an adjusting arc block (25); an inner side surface of each of the two guide vanes (21) is fixedly provided with an inclined block (26); the adjusting arc block (25) and the inclined block ( 26) sliding connection, when the driving shaft (9) rotates, the driving shaft (9) will synchronously drive the polygonal cam (14) to rotate, and the polygonal cam (14) will simultaneously lift the arc-shaped top block (15), and when the arc-shaped top block (15) is lifted, it will drive the screw rod (17) to rotate through the positioning bearing (16), and when the screw rod (17) rotates, it will adjust the angle of the guide blade (21) through the mounting plate (18), ensuring that the angle of the guide blade (21) is the same as the angle of the wind turbine blade (6), ensuring that the guide blade (21) effectively guides the airflow.

2. The surge-reducing and low-noise fan blade with adjustable blade angle according to claim 1, characterized in that: A driving motor (13) is fixedly installed inside the power cavity (3); an end of the driving shaft (9) away from the active bevel gear (10) passes through the installation cavity (4) and extends into the interior of the power cavity (3), and is fixedly connected to the output end of the driving motor (13).

3. The surge-reducing and low-noise fan blade with adjustable blade angle according to claim 1, characterized in that: The number of the notches (8) is multiple and arranged in an array, and the front surface of the hub body (1) is configured as a circular arc surface (27).

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