A type of adjustable blade angle wind turbine blade that reduces surge and noise.

Abstract

This invention relates to the field of wind turbine blade adjustment technology, and provides an adjustable blade angle wind turbine blade for reducing surge and noise. It includes a hub body and an adjustment component disposed on the inner wall of the hub body. The adjustment component includes multiple through holes disposed on the outer surface of the hub body. In use, under low flow and high back pressure conditions, the centrifugal force is small. The elastic force of the helical spring drives the drive block and two limiting rods to move towards the fixed column, facilitating an increase in the angle of attack of the wind turbine blade. This improves wind energy and airflow capture efficiency and avoids airflow separation at low flow rates. Under high flow and low back pressure conditions, the centrifugal force is greater than the preload of the helical spring. The limiting block slides along the slide rail towards the blade tip, reducing the angle of attack of the wind turbine blade. This helps prevent airflow separation and backflow caused by excessive angle of attack, thus suppressing surge at its source.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blade adjustment technology, and in particular to a wind turbine blade with adjustable blade angle that reduces surge and noise. Background Technology

[0002] Low-noise, surge-reducing fan blades achieve three core objectives simultaneously: suppressing surge, widening the stable operating range, and reducing aerodynamic noise through integrated aerodynamic shape, structural parameters, and material selection. Unlike ordinary fan blades that only pursue air volume, air pressure, and efficiency, these blades are the mainstream upgrade for industrial high-pressure fans, axial flow fans, and centrifugal fans.

[0003] Patent application number CN202411821161.7 describes in its specification that "This invention discloses an adjustable blade angle wind turbine blade with reduced surge and low noise, relating to the field of wind turbine blade technology. It includes a hub body, on which a connecting shaft is fixedly mounted. The hub body is internally divided into a power supply chamber, a mounting chamber, and a drive chamber. An adjustment component is disposed within the drive chamber, and a wind turbine blade is mounted on the adjustment component. A blade tail fin is fixedly mounted at the tail of the wind turbine blade, and the side edges of the wind turbine blade are notched. A linkage component is disposed within the mounting chamber, and a flow guide component is disposed on the linkage component. This invention concentrates airflow by synchronously rotating the flow guide blade with the wind turbine blade. This design effectively improves the airflow characteristics on the blade surface, increases lift, and reduces noise. Combining the flow guide blade with the blade angle adjustment mechanism enhances its adaptability and effectively improves the performance of the wind turbine blade."

[0004] While existing technologies offer the advantages mentioned above, they also have disadvantages: In non-design conditions such as low flow rate, high back pressure, or high flow rate, low back pressure, wind turbines are prone to airflow separation and backflow due to mismatched blade angle of attack, leading to surge; the main sources of wind turbine noise are large-scale vortices at the blade tips and airflow impacts from gap leaks, while traditional blades lack targeted dynamic noise reduction structures; furthermore, existing blade angle of attack adjustment often relies on electronic control systems or hydraulic drive mechanisms, which are prone to electronic failures and hydraulic leaks in harsh outdoor wind power environments, affecting operational reliability; therefore, there is an urgent need for an adjustable blade angle low-surge, low-noise wind turbine blade to solve these problems. Summary of the Invention

[0005] The purpose of this invention is to address the problems in existing technologies, such as wind turbines being prone to airflow separation and backflow due to mismatched blade angle of attack under non-design conditions (low flow, high back pressure, high flow, low back pressure, etc.), which can lead to surge; the main sources of wind turbine noise are large-scale vortices at the blade tips and airflow impact from gap leakage, while traditional blades lack targeted dynamic noise reduction structures; in addition, existing blade angle of attack adjustment often relies on electronic control systems or hydraulic drive mechanisms, which are prone to electronic failures and hydraulic leaks in the harsh outdoor environment of wind power, affecting operational reliability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable blade angle wind turbine blade for reducing surge and noise, comprising: a hub body, and further comprising:

[0007] An adjustment assembly is disposed on the inner wall of the wheel hub body, the adjustment assembly comprising:

[0008] Multiple through holes are provided on the outer surface of the hub body, and sealed bearings are installed on the inner walls of the multiple through holes;

[0009] Multiple wind turbine blades are respectively connected to the inner rings of multiple sealed bearings, and each of the multiple wind turbine blades has a reinforcing ring connected to one end;

[0010] Multiple internal gears are respectively disposed on the inner rings of multiple reinforcing rings, wherein multiple planetary gears are connected to the outer surfaces of the multiple internal gears;

[0011] A drive assembly is disposed on the inner wall of the wheel hub body;

[0012] A telescopic assembly is disposed on the inner wall of the wheel hub body.

[0013] Preferably, the adjustment component includes:

[0014] Multiple sun gears are respectively connected to the outer surface of multiple sets of planetary gears, and the inner walls of multiple sun gears are provided with connecting blocks.

[0015] The technical effect of adopting the above-mentioned further solution is that the sun gear and planetary gear mesh with each other, and the planetary gear and internal gear mesh with each other, which facilitates the improvement of the transmission stability between the sun gear, planetary gear and internal gear, and at the same time, the torque is amplified, which helps to improve the stability of the wind turbine blades when they rotate.

[0016] Preferably, the adjustment component further includes:

[0017] Multiple mounting plates are respectively disposed on the outer surface of the multiple connecting blocks, and multiple fixing rods are disposed on the outer surface of the multiple mounting plates;

[0018] Multiple sets of connecting rods are respectively installed on the outer surfaces of multiple mounting plates, and the outer surfaces of multiple sets of fixing rods are respectively installed on the inner rings of multiple sets of planetary gears.

[0019] The technical advantages of adopting the above-mentioned further solution are: the mounting plate and the connecting block are installed through bearings, which facilitates the flexibility of the connecting block when rotating; the mounting plate is fixedly connected to the fixing rod, and the fixing rod is fixedly connected to the fixing column, which facilitates the enhancement of the stability of the mounting plate.

[0020] Preferably, the driving component includes:

[0021] Multiple drive rods are respectively connected to the outer surface of multiple connecting blocks, wherein a rotating block is provided at the other end of each drive rod;

[0022] An mounting cavity is provided on the inner wall of the wheel hub body, and a fixing post is connected to the inner wall of the mounting cavity. The outer surface of the fixing post is connected to the outer surface of multiple sets of connecting rods.

[0023] The technical effect of adopting the above-mentioned further solution is that the drive rod is fixedly connected to the connecting block, which facilitates the improvement of the stability of the drive rod driving the connecting block to rotate.

[0024] Preferably, the driving component further includes:

[0025] Multiple mounting slots are provided on the outer surface of the fixed column, wherein the inner walls of the multiple mounting slots are respectively installed on the outer surface of the rotating block;

[0026] Multiple helical springs are respectively connected to the outer surface of multiple rotating blocks, and each of the multiple helical springs has a connecting ring at the other end.

[0027] The technical advantages of adopting the above-mentioned further solution are: the installation groove facilitates the provision of an installation position for the rotating block, and the two ends of the helical spring are fixedly connected to the connecting block and the connecting ring respectively, which facilitates the enhancement of the stability of the helical spring.

[0028] Preferably, the driving component further includes:

[0029] A drive block is mounted on the outer surface of the connecting ring, wherein the inner ring of the drive block is connected to a mounting ring;

[0030] A limiting block is connected to the inner ring of the mounting ring, and a slide rail is provided on the outer surface of the drive rod, with the inner wall of the slide rail disposed on the outer surface of the limiting block.

[0031] The technical effect of adopting the above-mentioned further solution is that the limiting block and the mounting ring are fixedly connected, which facilitates the improvement of the stability when the limiting block and the mounting ring move and rotate together.

[0032] Preferably, the driving component further includes:

[0033] Two limiting rods are installed on the outer surface of the drive block, and the outer surfaces of the two limiting rods are connected to a helical rod. The two ends of the helical rod are respectively installed on the outer surface of the mounting plate and the outer surface of the fixing column.

[0034] The technical effect of adopting the above-mentioned further solution is that the limit rod is fixedly connected to the drive block, which facilitates the enhancement of the stability of the limit rod.

[0035] Preferably, the telescopic component includes:

[0036] Multiple placement slots are respectively set on the inner wall of multiple wind turbine blades, and each placement slot has a telescopic block installed on its inner wall.

[0037] The technical advantage of adopting the above-mentioned further solution is that the placement groove facilitates the installation and movement of the cable and telescopic block.

[0038] Preferably, the telescopic component further includes:

[0039] Multiple guide teeth are respectively disposed on the outer surface of multiple telescopic blocks, and each of the outer surface of multiple telescopic blocks is provided with a cable.

[0040] The technical effect of adopting the above-mentioned further solution is that the telescopic block is fixedly connected to the cable, which facilitates the stability of the cable driven by the telescopic block wall.

[0041] Preferably, the telescopic component further includes:

[0042] The outer surfaces of the multiple cables are disposed on the inner wall of the placement groove, and the other ends of the multiple cables are respectively connected to the outer surfaces of the multiple limiting blocks, and the multiple cables respectively pass through the multiple connecting blocks.

[0043] The technical effect of adopting the above-mentioned further solution is that the cable is installed in the placement groove, which makes it easier to limit the range of movement of the cable and improve the stability of the cable.

[0044] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0045] 1. When using this invention, under low flow and high back pressure conditions, the centrifugal force is small. The elastic force of the helical spring drives the drive block and two limiting rods to move towards the fixed column, which facilitates an increase in the angle of attack of the wind turbine blades, which is beneficial to improving wind energy and airflow capture efficiency and avoiding airflow separation at low flow rates. Under high flow and low back pressure conditions, the centrifugal force is greater than the preload of the helical spring. The limiting block slides along the slide rail towards the tip of the wind turbine blade, which reduces the angle of attack of the wind turbine blades. This helps to prevent airflow separation and backflow caused by excessive angle of attack, and helps to suppress surge from the root.

[0046] 2. When the blade angle of attack decreases, the limiting block moves away from the fixed column, which relaxes the cable between the limiting block and the telescopic block. As a result, the telescopic block and the guide tooth are thrown out of the placement slot under the action of centrifugal force. This makes it easier to break the large-scale eddy current at the tip of the wind turbine blade by utilizing the sawtooth structure of the guide tooth, which is beneficial to further reduce tip clearance leakage and eddy current impact noise.

[0047] 3. When in use, this invention converts the centrifugal force of the rotating hub body into a power source for adjusting the angle of attack of the wind turbine blades. This facilitates real-time mechanical response to operating conditions, centrifugal force, and angle of attack, enabling dynamic adaptation to a wide range of operating conditions and eliminating the risk of electronic malfunctions during operation. The centrifugal force generated by the rotating hub body serves as the sole mechanical drive source, sharing the core component of the limit block, eliminating the need for additional drive mechanisms and achieving lightweight and integrated structure. Attached Figure Description

[0048] Figure 1 A schematic diagram of a surge-reducing and low-noise fan blade with adjustable blade angle provided by the present invention;

[0049] Figure 2 A bottom view of the structure of an adjustable blade angle wind turbine blade for reducing surge and noise, provided by the present invention.

[0050] Figure 3 A side view of the mounting cavity structure of an adjustable blade angle wind turbine blade for reducing surge and noise, provided by the present invention;

[0051] Figure 4 A partial cross-sectional view of a low-noise, surge-reducing fan blade with adjustable blade angle provided by the present invention.

[0052] Figure 5 A schematic diagram of the through-hole structure of an adjustable blade angle wind turbine blade for reducing surge and noise, provided by the present invention.

[0053] Figure 6 A schematic diagram of the cable-stayed structure of an adjustable blade angle wind turbine blade for reducing surge and noise, provided by the present invention;

[0054] Figure 7 This invention provides an adjustable blade angle for reducing surge and noise in wind turbines. Figure 5 Enlarged view of point A;

[0055] Figure 8 This invention provides an adjustable blade angle for reducing surge and noise in wind turbines. Figure 6 Enlarged view of point B.

[0056] Legend:

[0057] 1. Hub body; 101. Through hole; 2. Wind turbine blade; 3. Placement slot; 4. Mounting cavity; 5. Telescopic block; 501. Guide tooth; 6. Fixed column; 7. Connecting rod; 701. Mounting plate; 702. Drive rod; 703. Rotating block; 704. Helical spring; 705. Connecting block; 706. Sun gear; 707. Planetary gear; 708. Fixed rod; 709. Internal gear; 710. Cable; 711. Slide rail; 712. Mounting ring; 713. Connecting ring; 714. Helical rod; 715. Limiting block; 716. Mounting slot; 717. Limiting rod; 8. Sealed bearing; 9. Reinforcing ring; 10. Drive block. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] Example 1, as Figure 1 - Figure 8 As shown, the present invention provides a technical solution: an adjustable blade angle wind turbine blade with reduced surge and low noise, comprising: a hub body 1 and an adjustment assembly;

[0060] The adjustment assembly includes: multiple through holes 101, which are evenly distributed on the outer surface of the hub body 1. Sealed bearings 8 are fixedly installed on the inner walls of the multiple through holes 101. Wind turbine blades 2 are fixedly connected to the inner rings of the multiple sealed bearings 8. When the wind turbine blades 2 rotate, they drive the inner rings of the sealed bearings 8 to rotate. The outer rings of the sealed bearings 8, which are fixed to the inner walls of the through holes 101, do not rotate. When the hub body 1 rotates, it drives the through holes 101, the sealed bearings 8, and the wind turbine blades 2 to rotate.

[0061] Among them, a reinforcing ring 9 is fixedly connected to one end of each of the multiple wind turbine blades 2; an internal gear 709 is fixedly installed on the inner ring of each of the multiple reinforcing rings 9; a multiple planetary gear 707 is meshed on the outer surface of each of the multiple internal gears 709; when the planetary gear 707 rotates, it drives the internal gear 709, the reinforcing ring 9 and the wind turbine blades 2 to rotate.

[0062] It should be noted that the outer surfaces of multiple sets of planetary gears 707 are meshed with sun gears 706, and the inner walls of multiple sun gears 706 are fixedly provided with connecting blocks 705. When the connecting blocks 705 rotate, they drive the sun gears 706 and planetary gears 707 to rotate.

[0063] In addition, mounting plates 701 are mounted on the outer surfaces of multiple connecting blocks 705 via bearings, and multiple fixing rods 708 are fixedly installed on the outer surfaces of multiple mounting plates 701, allowing the connecting blocks 705 to rotate within the mounting plates 701.

[0064] As examples, in this embodiment, multiple connecting rods 7 are fixedly mounted on the outer surfaces of multiple mounting plates 701, and the outer surfaces of multiple sets of fixing rods 708 are respectively mounted on the inner rings of multiple sets of planetary gears 707 through bearings. The mounting plates 701 are constrained by the connecting rods 7, so that the mounting plates 701 do not rotate coaxially with the connecting blocks 705, and the planetary gears 707 can rotate on the fixing rods 708.

[0065] In this embodiment, when the connecting block 705 rotates clockwise or counterclockwise, it drives the sun gear 706, planetary gear 707, internal gear 709, reinforcing ring 9, and wind turbine blade 2 to rotate clockwise or counterclockwise. This facilitates adjusting the angle of the wind turbine blade 2 on the hub body 1, and allows for increasing or decreasing the angle of attack of the wind turbine blade 2. Increasing the angle of attack helps improve wind energy and airflow capture efficiency and avoids airflow separation at low flow rates, with a maximum angle of attack ≤15°. Decreasing the angle of attack helps prevent airflow separation and backflow caused by an excessively large angle of attack, and helps suppress surge at its source, with a minimum angle of attack ≥3°.

[0066] Example 2, as Figure 1 - Figure 8 As shown, the present invention provides a technical solution: an adjustable blade angle wind turbine blade with reduced surge and low noise, comprising: a drive assembly.

[0067] It should be noted that the drive assembly includes: multiple drive rods 702, one end of each drive rod 702 is fixedly connected to the outer surface of multiple connecting blocks 705, and the other end of each drive rod 702 is synchronously bearing a rotating block 703; the inner wall of the hub body 1 has an installation cavity 4, the inner wall of the installation cavity 4 is fixedly connected to a fixing post 6, and the outer surface of the fixing post 6 is fixedly connected to the outer surface of multiple sets of connecting rods 7. When the hub body 1 rotates, it drives the installation cavity 4, the fixing post 6, the connecting rods 7 and the installation plate 701 to rotate.

[0068] As examples, in this embodiment, the outer surface of the fixed column 6 is provided with multiple mounting grooves 716, and the inner walls of the multiple mounting grooves 716 are respectively fixedly installed on the outer surface of the rotating block 703. When the fixed column 6 rotates, it drives the mounting grooves 716, the rotating block 703 and the drive rod 702 to rotate. The outer surfaces of the multiple rotating blocks 703 are all fixedly installed with helical springs 704, and the other ends of the multiple helical springs 704 are all fixedly provided with connecting rings 713. When the drive rod 702 rotates with the hub body 1, it drives the connecting block 705 to rotate, and the helical springs 704 can pull the connecting rings 713 to move linearly.

[0069] In addition, a drive block 10 is mounted on the outer surface of the connecting ring 713 via a bearing, and an mounting ring 712 is fixedly connected to the inner ring of the drive block 10. When the connecting ring 713 moves, it drives the drive block 10 and the mounting ring 712 to move linearly. A limit block 715 is fixedly connected to the inner ring of the mounting ring 712. A slide rail 711 is provided on the outer surface of the drive rod 702. The inner wall of the slide rail 711 is slidably disposed on the outer surface of the limit block 715. When the mounting ring 712 moves, it drives the limit block 715 to move linearly on the inner wall of the slide rail 711.

[0070] Two limiting rods 717 are fixedly installed on the outer surface of the drive block 10. A spiral rod 714 is slidably connected to the outer surface of the two limiting rods 717. The two ends of the spiral rod 714 are fixedly installed on the outer surface of the mounting plate 701 and the outer surface of the fixing column 6, respectively. The two limiting rods 717 are symmetrically distributed on the outer surface of the spiral rod 714. When the drive block 10 moves, it drives the limiting rods 717 to slide on the spiral rod 714. Guided by the spiral rod 714, the limiting rods 717 move linearly and rotate at the same time, thereby driving the drive block 10 to rotate.

[0071] In this embodiment, due to the cooperation between the two limiting rods 717 and the spiral rod 714, the drive block 10 rotates while moving linearly, thereby driving the mounting ring 712, the limiting block 715, the slide rail 711, the drive rod 702, the connecting block 705 and the sun wheel 706 to rotate.

[0072] Example 3, as Figure 1 - Figure 8 As shown, the present invention provides a technical solution: an adjustable blade angle wind turbine blade with reduced surge and low noise, comprising: a telescopic assembly.

[0073] The telescopic component includes: multiple wind turbine blades 2 each having a placement groove 3 inside, and multiple placement grooves 3 each having a telescopic block 5 slidably installed on the inner wall of the multiple placement grooves 3. The telescopic block 5 can extend and retract within the placement groove 3, making it easy for the telescopic block 5 to extend and retract from the wind turbine blade 2.

[0074] It should be noted that multiple guide teeth 501 are provided on the outer surface of multiple telescopic blocks 5, and multiple cables 710 are fixedly connected to the outer surface of multiple telescopic blocks 5. The cables 710 are used to pull the telescopic blocks 5 to move in a straight line, and when the telescopic blocks 5 move, they drive the guide teeth 501 to move in a straight line.

[0075] In addition, the outer surfaces of multiple cables 710 are movably disposed on the inner wall of the placement groove 3, and the other ends of multiple cables 710 are rotatably connected to the outer surfaces of multiple limiting blocks 715 respectively. Multiple cables 710 pass through multiple connecting blocks 705 respectively. The cables 710 move within the placement groove 3. When the limiting blocks 715 move, they drive one end of the cables 710 to move linearly.

[0076] In this embodiment, when the limiting block 715 moves, it drives the cable 710, the telescopic block 5 and the guide tooth 501 to move.

[0077] Working principle: During operation, when the hub body 1 is in operation, the airflow drives the wind turbine blades 2 to rotate, generating centrifugal force. The rotation of the wind turbine blades 2 causes the hub body 1 and its internal structure to rotate together. The centrifugal force causes the limiting block 715 to move radially along the slide rail 711. Under low flow and high back pressure conditions, the centrifugal force is small. The helical spring 704 pulls the connecting ring 713, driving block 10, mounting ring 712, limiting block 715, and two limiting rods 717 towards the fixed column 6. The two limiting rods 717 move along the helical rod 714. During sliding, guided by the helical rod 714, the limiting rod 717 rotates while moving linearly, thereby driving the drive block 10 to rotate. This, in turn, drives the mounting ring 712, limiting block 715, slide rail 711, drive rod 702, connecting block 705, sun gear 706, planetary gear 707, internal gear 709, reinforcing ring 9, and wind turbine blades 2 to rotate. This facilitates an increase in the angle of attack of the wind turbine blades 2, which is beneficial for improving wind energy and airflow capture efficiency and avoiding airflow separation at low flow rates. Under high flow and low back pressure conditions, When the centrifugal force exceeds the preload of the helical spring 704, the limiting block 715 slides along the slide rail 711 towards the tip of the wind turbine blade 2, reducing the angle of attack of the wind turbine blade 2. This helps prevent airflow separation and backflow caused by an excessive angle of attack, thus suppressing surge at its source. The centrifugal force from the rotation of the hub body 1 is converted into a power source for adjusting the angle of attack of the wind turbine blade 2, facilitating real-time mechanical response to operating conditions, centrifugal force, and angle of attack. This allows for dynamic adaptation to a wide range of operating conditions and eliminates the risk of electronic malfunctions during operation. When the blade angle of attack increases, the limiting block 715 slides towards... The fixed column 6 moves in the direction of the fixed column 6, which drives the cable 710 and the telescopic block 5 to move towards the root of the wind turbine blade 2 in the placement groove 3. When the angle of attack of the blade decreases, the limiting block 715 moves away from the fixed column 6, so that the cable 710 between the limiting block 715 and the telescopic block 5 is in a relaxed state. Then, the telescopic block 5 and the guide tooth 501 are thrown out of the placement groove 3 under the action of centrifugal force, which makes it easier to use the sawtooth structure of the guide tooth 501 to break the large-scale eddy current at the tip of the wind turbine blade 2, which is conducive to further reducing tip gap leakage and eddy current impact noise.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An adjustable blade angle low-surge and low-noise fan blade, comprising: The hub body (1) is characterized in that it further includes: An adjustment assembly is disposed on the inner wall of the wheel hub body (1), the adjustment assembly comprising: Multiple through holes (101) are provided on the outer surface of the hub body (1), wherein the inner walls of the multiple through holes (101) are all fitted with sealed bearings (8). Multiple wind turbine blades (2) are respectively connected to the inner rings of multiple sealed bearings (8), and one end of each of the multiple wind turbine blades (2) is connected to a reinforcing ring (9). Multiple internal gears (709) are respectively disposed on the inner rings of multiple reinforcing rings (9), wherein multiple planetary gears (707) are connected to the outer surfaces of the multiple internal gears (709). A drive assembly is disposed on the inner wall of the hub body (1); A telescopic assembly is provided on the inner wall of the hub body (1); The adjustment component includes: Multiple sun gears (706) are respectively connected to the outer surface of multiple sets of planetary gears (707), wherein the inner wall of each sun gear (706) is provided with a connecting block (705). The driving component includes: Multiple drive rods (702) are respectively connected to the outer surface of multiple connecting blocks (705), wherein the other end of each drive rod (702) is provided with a rotating block (703). The mounting cavity (4) is provided on the inner wall of the hub body (1), and the inner wall of the mounting cavity (4) is connected to a fixing post (6), the outer surface of the fixing post (6) is connected to the outer surface of multiple sets of connecting rods (7); The driving component also includes: Multiple mounting slots (716) are provided on the outer surface of the fixed column (6), wherein the inner walls of the multiple mounting slots (716) are respectively installed on the outer surface of the rotating block (703); Multiple helical springs (704) are respectively connected to the outer surface of multiple rotating blocks (703), and each of the multiple helical springs (704) is provided with a connecting ring (713) at the other end. The driving component also includes: A drive block (10) is mounted on the outer surface of the connecting ring (713), wherein the inner ring of the drive block (10) is connected to a mounting ring (712). A limiting block (715) is connected to the inner ring of the mounting ring (712), and a slide rail (711) is provided on the outer surface of the drive rod (702), and the inner wall of the slide rail (711) is provided on the outer surface of the limiting block (715). The driving component also includes: Two limiting rods (717) are installed on the outer surface of the drive block (10), wherein the outer surfaces of the two limiting rods (717) are connected to a spiral rod (714), and the two ends of the spiral rod (714) are respectively installed on the outer surface of the mounting plate (701) and the outer surface of the fixing column (6); Two limiting rods (717) are symmetrically distributed on the outer surface of the screw rod (714). When the driving block (10) moves, it drives the limiting rods (717) to slide on the screw rod (714). Guided by the screw rod (714), the limiting rods (717) rotate while moving in a straight line, thereby driving the driving block (10) to rotate. The telescopic component includes: Multiple placement slots (3) are respectively set on the inner wall of multiple wind turbine blades (2), wherein the inner wall of each of the multiple placement slots (3) is equipped with a telescopic block (5). The telescopic component also includes: Multiple guide teeth (501) are respectively disposed on the outer surface of multiple telescopic blocks (5), and each of the outer surface of multiple telescopic blocks (5) is provided with a cable (710).

2. The adjustable blade angle low-surge and low-noise fan blade according to claim 1, characterized in that: The adjustment component further includes: Multiple mounting plates (701) are respectively disposed on the outer surface of multiple connecting blocks (705), and multiple fixing rods (708) are disposed on the outer surface of the multiple mounting plates (701). Multiple sets of connecting rods (7) are respectively installed on the outer surfaces of multiple mounting plates (701), and the outer surfaces of multiple sets of fixing rods (708) are respectively installed on the inner rings of multiple sets of planetary gears (707).

3. The adjustable blade angle low-surge and low-noise fan blade according to claim 2, characterized in that: The telescopic component also includes: The outer surfaces of the plurality of cables (710) are disposed on the inner wall of the placement groove (3), and the other ends of the plurality of cables (710) are respectively connected to the outer surfaces of the plurality of limiting blocks (715). The plurality of cables (710) pass through the plurality of connecting blocks (705).

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