Surge-reducing low-noise fan blade with adjustable blade angle

Abstract

The invention discloses an anti-surge low-noise fan blade capable of adjusting the blade angle, and relates to the technical field of wind turbine blades. Comprising a hub body, a connecting rotating shaft is fixedly mounted on the hub body, the interior of the hub body is divided into a power source cavity, a mounting cavity and a driving cavity, an adjusting assembly is arranged in the driving cavity, wind turbine blades are mounted on the adjusting assembly, and blade empennages are fixedly mounted at the tails of the wind turbine blades; a notch is formed in the side edge of the wind turbine blade, a linkage assembly is arranged in the mounting cavity, and a flow guide assembly is arranged on the linkage assembly. Air flow is concentrated through synchronous rotation of the flow guide blades and the wind turbine blades, the flow characteristic of the air flow on the surfaces of the blades can be effectively improved through the design, lift force is increased, and noise is reduced. And the guide blades are combined with an angle adjusting mechanism of the blades, so that the adaptability is enhanced, and the using effect of the wind turbine blade is effectively improved.

Description

Technical Field

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

[0002] The wind turbine generator set includes a wind rotor and a generator; the wind rotor contains blades, a hub, and reinforcements; it has the functions of generating electricity by rotating the blades under wind power and rotating the generator head. The wind power source consists of a wind turbine generator set, a tower supporting the generator set, a battery charge controller, an inverter, an unloader, a grid-connected controller, and a battery pack, among which the wind turbine blades are an indispensable part of the wind turbine generator set.

[0003] Most of the existing wind turbine blades are fixed on the hub. Since the fixed blades cannot be adjusted according to the real-time wind speed and wind direction changes, the aerodynamic efficiency under different working conditions is low, and a single wind turbine blade cannot quickly capture wind energy. At the same time, 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 fan blade with adjustable blade angle to solve the above-mentioned problems. Summary of the invention

[0004] In view of the deficiencies in 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 cavity, a mounting cavity and a drive cavity, an adjusting component being arranged inside the drive cavity, a wind turbine blade being mounted on the adjusting component, a blade tail being fixedly mounted at the tail of the wind turbine blade, and a side edge of the wind turbine blade being arranged as a notch;

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

[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 one 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, an end of the spiral rod away from the locating bearing passes through the hub body and a mounting plate fixedly mounted thereon.

[0011] Preferably, a return spring is fixedly mounted on the arc-shaped top block, 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, 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, the number of the notches is plural and 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 and low-noise fan blade with adjustable blade angle. Compared with the prior art, it has the following beneficial effects:

[0016] 1. The present invention can reduce the noise generated when the airflow cuts the blade edge through the notch on the wind turbine blade, and 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 together to adjust the angle of the wind turbine blade through the connecting shaft, 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 under different environmental conditions;

[0017] 2. In the present invention, 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, which effectively improves the flow characteristics of the airflow on the blade surface, increases lift, reduces noise, and improves 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 protrusion to rise, and the protrusion will lift the arc-shaped top block at the same time. When the arc-shaped top block is lifted, it will drive the spiral rod to rotate through the positioning bearing. When the spiral rod rotates, it will adjust the angle of the guide vane through the installation plate to ensure that the angle of the guide vane is the same as the angle of the wind turbine blade, thereby ensuring that the guide vane 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 A cross-sectional view of a hub body of the present invention;

[0022] Figure 4 The internal structure of the hub body in the present invention is shown in FIG. Figure 1 ;

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

[0024] Figure 6 The internal structure of the hub body in the present invention is shown in FIG. Figure 2 ;

[0025] Figure 7 It is a schematic diagram of the structure of the bump in the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the guide vane in the present invention;

[0027] Fig. 9 It is a schematic structural 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. installation 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. installation plate; 19. reset spring; 20. installation slot; 21. guide blade; 22. guide slope; 23. connecting tension spring; 24. electric push rod; 25. adjustment arc block; 26. tilting block; 27. arc surface. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0030] Embodiment 1:

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

[0032] The adjustment component includes a driving shaft 9 rotatably installed inside the driving cavity 5, a driving bevel gear 10 is fixedly installed on the driving shaft 9, a connecting shaft 11 is rotatably connected to the inner side surface of the driving cavity 5, a driven bevel gear 12 is fixedly installed on one end of the connecting shaft 11, 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, one end of the driving shaft 9 away from the driving bevel gear 10 passes through the installation cavity 4, and extends to the inside of the power supply cavity 3, and is fixedly connected to the output end of the driving motor 13, wherein an inclined through hole can be opened on the side surface of the hub body 1, wherein the power supply cavity 3 is connected to the outside through the through hole, and 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 driving motor 13.

[0033] In this embodiment, the notch 8 on the wind turbine blade 6 can be used to reduce the noise generated when the airflow cuts the edge of the blade. At the same time, the driving shaft 9 is driven to rotate by the motor. The active bevel gear 10 on the driving shaft 9 and the driven bevel gear 12 on the connecting shaft 11 are used together. 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] Embodiment 2:

[0035] See also Figure 1-9On the basis of the first embodiment, a linkage component is arranged inside the installation cavity 4, and a guide component is arranged 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 arranged on the two end surfaces of the mounting plate 18, and the mounting groove 20 is internally rotatably connected with a guide blade 21. 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, wherein 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 The two guide blades 21 are pulled 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 an 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, wherein the friction between the adjusting arc block 25 and the tilting block 26 is small, thereby 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 are used to concentrate 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, which effectively improves the flow characteristics of the airflow on the blade surface, increases lift, and reduces noise, thereby improving the use effect of the wind turbine blade 6.

[0037] Embodiment three:

[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 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 a mounting plate 18 is fixedly mounted, a reset spring 19 is fixedly mounted on the arc-shaped top block 15, and an end of the reset 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 relatively 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 limiting function of the mounting cavity 4 and be in an ascending state, and at the same time, the friction between the mounting cavity 4 and the arc-shaped top block 15 is relatively 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 protrusion to rise, and the protrusion will lift the arc-shaped top block 15 at the same time. When the arc-shaped top block 15 is lifted, 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, and the motor drives the driving shaft 9 to rotate. The active bevel gear 10 on the driving shaft 9 and the driven bevel gear 12 on the connecting shaft 11 are used together to adjust the angle of the wind turbine blade 6 through the connecting shaft 11, thereby adjusting the windward angle of the wind turbine blade 6, optimizing its performance under different wind speeds and wind directions, and enhancing the adaptability of the generator blades under 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 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 rotate inward through 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 the lift, and reducing the 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 protrusion to rise, and the protrusion will lift the arc-shaped top block 15 at the same time. When the arc-shaped top block 15 is lifted, 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.

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

[0045] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations 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 component is arranged inside the drive chamber (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); and a side edge of the wind turbine blade (6) is arranged as a notch (8); A linkage assembly is arranged inside the installation cavity (4), and a flow guide assembly is arranged on the linkage assembly, so that the airflow is concentrated on the wind turbine blades (6) through the flow guide assembly.

2. The anti-surge and low-noise fan blade with adjustable blade angle according to claim 1, characterized in that: 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 a hub body (1) and being fixedly connected to a wind turbine blade (6), the driving bevel gear (10) being meshed with the driven bevel gear (12).

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

4. The anti-surge and low-noise fan blade with adjustable blade angle according to claim 2, characterized in that: The linkage assembly comprises a polygonal cam (14) fixedly mounted on a driving shaft (9) and an arc-shaped top block (15) slidably connected to the inside of a mounting cavity (4); a locating bearing (16) is fixedly mounted on the arc-shaped top block (15); a spiral rod (17) is fixedly mounted on the locating bearing (16); an end of the spiral rod (17) away from the locating bearing (16) passes through the wheel hub body (1) and is fixedly mounted with a mounting plate (18).

5. The anti-surge and low-noise fan blade with adjustable blade angle according to claim 4, characterized in that: A return spring (19) is fixedly mounted on the arc-shaped top block (15); one end of the return spring (19) away from the arc-shaped top block (15) is fixedly connected to the inside of the mounting cavity (4); the return spring (19) is located outside the spiral rod (17); and the spiral rod (17) is movably connected to the wheel hub body (1).

6. The anti-surge and low-noise fan blade with adjustable blade angle according to claim 5, characterized in that: The guide assembly comprises a mounting groove (20) arranged on two end surfaces of a mounting plate (18), a guide vane (21) is rotatably connected inside the mounting groove (20), a guide slope (22) is arranged on the inner edge of the guide vane (21), and a connecting tension spring (23) is fixedly connected between the two guide vanes (21).

7. The anti-surge and low-noise fan blade with adjustable blade angle according to claim 6, characterized in that: An electric push rod (24) is fixedly mounted on the mounting plate (18), an output shaft of the electric push rod (24) is fixedly connected to an adjusting arc block (25), inner sides of the two guide vanes (21) are fixedly mounted with tilting blocks (26), and the adjusting arc blocks (25) are slidably connected to the tilting blocks (26).

8. The anti-surge and low-noise fan blade with adjustable blade angle according to claim 1, characterized in that: The number of the notches (8) is plural 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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