Fan blade, wind turbine generator unit and flow guide control method

Abstract

The application relates to a fan blade, a wind turbine generator unit and a guide member control method, and relates to the technical field of wind power generation. The fan blade comprises a guide cover, a guide member and a plurality of blade bodies. The guide cover has a windward surface. The plurality of blade bodies are distributed along the circumference of the guide cover, and the plurality of blade bodies are connected with the guide cover. The guide member has a guide surface, and the guide member is rotatably connected to the windward surface, so that the guide surface is relatively close to or far away from a target part of the windward surface. The guide surface is used for guiding bypass airflow around the guide cover to at least part of the blade bodies. The target part represents a part of the windward surface which is arranged opposite to the guide surface. The fan blade, the wind turbine generator unit and the guide member control method can effectively improve the wind energy utilization coefficient, thereby improving the power generation efficiency of the wind turbine generator unit.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, specifically to a control method for wind turbine blades, wind turbine generator sets, and guide vanes. Background Technology

[0002] Wind turbine blades typically consist of a shroud and multiple blade bodies. These blade bodies are distributed circumferentially along the shroud. Under wind power, the shroud and blade bodies rotate synchronously, converting kinetic energy into electrical energy to generate electricity. The wind energy utilization factor (CP) is an important technical indicator for measuring the power generation efficiency of wind turbines.

[0003] However, in related technologies, the improvement of the wind energy utilization coefficient of wind turbine generators is limited and difficult to further improve, which affects the power generation efficiency of wind turbine generators.

[0004] Therefore, how to effectively improve the wind energy utilization coefficient, thereby increasing the power generation efficiency of wind turbine generators, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To address the aforementioned technical problems, embodiments of this application provide a method for controlling wind turbine blades, wind turbine generator sets, and guide vanes, which can effectively improve the wind energy utilization coefficient, thereby increasing the power generation efficiency of wind turbine generator sets.

[0006] Firstly, a wind turbine blade is provided, comprising: The fairing has a windward side; Multiple blade bodies are distributed circumferentially along the guide fairing, and all of the multiple blade bodies are connected to the guide fairing; A flow guide has a flow guide surface rotatably connected to the windward surface so that the flow guide surface is relatively close to or away from a target portion of the windward surface; wherein the flow guide surface is used to guide bypass airflow that bypasses the flow guide to at least a portion of the blade body; the target portion is characterized as a portion of the windward surface that is disposed opposite to the flow guide surface.

[0007] According to a first aspect of this application, the wind turbine blades further include: A drive mechanism is connected between the guide surface and the target part, and the drive mechanism is used to drive the guide component to rotate relative to the windward surface.

[0008] According to a first aspect of this application, the drive mechanism includes: The first body is connected to the guide surface; The second body is connected to the target part; An adjustable telescopic component, wherein the opposite ends of the telescopic component are rotatably connected to the first base and the second base, respectively.

[0009] According to a first aspect of this application, the guide surface extends from the center of the guide shield to the blade root region of the blade body.

[0010] According to a first aspect of this application, the thickness of the flow guide gradually increases along the direction from the center to the edge of the flow guide.

[0011] According to a first aspect of this application, the width of the guide surface gradually increases along the direction from the center to the edge of the guide shield.

[0012] According to a first aspect of this application, the guide surface is constructed as a streamlined curved surface.

[0013] According to a first aspect of this application, the number of the flow guides is the same as the number of the blade bodies, and they correspond one-to-one; a plurality of the flow guides are distributed circumferentially along the flow guide shroud, and each flow guide is used to guide the bypass airflow to the corresponding blade body.

[0014] According to a first aspect of this application, the wind turbine blades include: A wind speed sensor is mounted on the blade body.

[0015] Secondly, a wind turbine generator set is also provided, comprising: Organism; The fan blades, as described in the previous embodiment, are mounted on the body.

[0016] Thirdly, a guide vane control method is also provided, applied to the wind turbine blade as described in the previous embodiment; the wind turbine blade includes a wind speed sensor disposed on the blade body; The flow guide control method includes: The surface wind speed of the blade body detected by the wind speed sensor is obtained. The guide element is controlled to rotate relative to the windward surface based on the surface wind speed; wherein the distance between the guide surface and the target part is negatively correlated with the surface wind speed.

[0017] The wind turbine blade, wind turbine generator set, and guide vane control method provided in this application embodiment utilizes a rotatable guide vane on the windward side of the deflector. This guide vane directs bypass airflow to at least a portion of the blade body, causing the bypass airflow to superimpose with the main airflow on the blade body surface. This combination of bypass and main airflow increases the effective wind speed and lift experienced by the blade body. By effectively utilizing the bypass airflow bypassing the deflector, the wind energy utilization coefficient can be improved, thereby increasing the power generation efficiency of the wind turbine generator set. Furthermore, by rotating the guide vane, the guide vane can be adjusted to move closer to or further away from the target portion on the windward side, thus regulating the guiding effect on the bypass airflow. Attached Figure Description

[0018] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0019] Figure 1 This is a schematic diagram of the structure of a wind turbine blade provided for an exemplary embodiment of this application.

[0020] Figure 2 This is a partial schematic diagram of a wind turbine blade provided for an exemplary embodiment of this application.

[0021] Figure 3 A schematic diagram of the structure of a flow guide provided in an exemplary embodiment of this application from a first perspective.

[0022] Figure 4 A schematic diagram of the structure of a flow guide provided in an exemplary embodiment of this application from a second perspective.

[0023] Figure 5 This is a flowchart illustrating a flow guide control method provided for an exemplary embodiment of this application.

[0024] Reference numerals: 100-Wind turbine blade; 110-Diffuser; 111-Windward surface; 1111-Target part; 120-Blade body; 130-Diffuser component; 131-Diffuser surface; 140-Drive mechanism; 141-First base; 142-Second base; 143-Telescopic component; 150-Wind speed sensor. Detailed Implementation

[0025] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0026] Wind turbine blades typically consist of a shroud and multiple blade bodies distributed circumferentially along the shroud. Under wind power, the shroud and blade bodies rotate synchronously, converting kinetic energy into electrical energy to generate electricity. The coefficient of performance (CP) is a crucial technical indicator for measuring the power generation efficiency of wind turbines. However, improvements to the CP of wind turbines are limited in related technologies, making further increases difficult and impacting the overall power generation efficiency of wind turbines.

[0027] Through analysis, the inventors discovered that the root cause of the aforementioned problems lies in the fact that the fairing primarily serves a protective function, with limited guidance of airflow. When airflow passes over the fairing surface, the fairing struggles to effectively direct a significant amount of airflow onto the blade body. Most of the airflow bypasses the fairing, forming a bypass flow. In other words, the fairing cannot effectively utilize this bypass airflow, thus preventing it from superimposing with the main airflow affecting the blade body. This hinders further improvement in the wind energy utilization coefficient and impacts the power generation efficiency of the wind turbine generator.

[0028] To address the aforementioned issues, the wind turbine blade, wind turbine generator set, and guide vane control method provided in this application embodiment utilizes a rotatable guide vane on the windward side of the deflector. This guide vane directs bypass airflow to at least a portion of the blade body, causing the bypass airflow to superimpose with the main airflow on the blade body surface. This combination of bypass and main airflow increases the effective wind speed and lift experienced by the blade body. By effectively utilizing the bypass airflow bypassing the deflector, the wind energy utilization coefficient can be improved, thereby enhancing the power generation efficiency of the wind turbine generator set. Furthermore, by rotating the guide vane, the guide vane can be positioned closer to or further away from the target portion on the windward side, adjusting the guiding effect of the guide vane on the bypass airflow.

[0029] The control methods for wind turbine blades, wind turbine generator sets, and guide vanes provided in the embodiments of this application will be described in detail below.

[0030] Figure 1 This is a schematic diagram of the structure of a wind turbine blade provided for an exemplary embodiment of this application. Figure 2 This is a partial schematic diagram of a wind turbine blade provided for an exemplary embodiment of this application. Figure 1 and Figure 2 As shown, the wind turbine blade 100 provided in this application embodiment may include a shroud 110, a guide member 130, and a plurality of blade bodies 120.

[0031] It should be noted that the fairing 110 has a windward surface 111, which can be understood as the outer surface of the fairing 110 facing the direction of the incoming flow.

[0032] It should be noted that multiple blade bodies 120 are distributed circumferentially along the fairing 110, and all multiple blade bodies 120 are connected to the fairing 110. The windward surface 111 can guide part of the airflow to the blade body 120, thereby increasing the lift of the blade body 120.

[0033] It should be noted that the guide element 130 has a guide surface 131, which can guide the bypass airflow that bypasses the deflector 110 to at least a portion of the blade body 120. The bypass airflow can be understood as the airflow that does not directly flow over the effective windward surface of the blade body 120 and would originally bypass the outside of the deflector 110. After the guide surface 131 guides the bypass airflow to the blade body 120, the bypass airflow and the main airflow received by the blade body 120 superimpose on the surface of the blade body 120, thereby increasing the effective wind speed of the blade body 120 and thus increasing the aerodynamic lift of the blade body 120, which is beneficial to improving the wind energy utilization coefficient.

[0034] It should be noted that the guide member 130 is rotatably connected to the windward surface 111, allowing the guide surface 131 to move relatively closer to or relatively farther away from the target part 1111. The target part 1111 can be understood as the part of the windward surface 111 that is opposite to the guide surface 131. By rotating the guide member 130, the distance between the guide surface 131 and the target part 1111 can be changed, thereby adjusting the strength of the guiding effect.

[0035] In practical applications, when the wind speed is high, if the distance between the guide 130 and the target part 1111 is large, the guide 130 will bear a large airflow impact load, which may easily lead to damage to the guide 130. When the wind speed is low, if the distance between the guide 130 and the target part 1111 is small, the guide 130 will have a poor guiding effect on the bypass airflow, and the aerodynamic lift on the surface of the blade body 120 will be limited, which will not significantly improve the wind energy utilization coefficient. Therefore, in practical applications, the rotation of the guide component 130 can be controlled according to actual working conditions such as wind speed, so that the guide component 130 is relatively closer to or farther away from the target part 1111, and the distance between the guide surface 131 and the target part 1111 can be adjusted. In this way, a dynamic balance can be achieved between the guiding effect of the guide component 130 and the airflow impact load on the guide component 130. That is, while ensuring the guiding effect of the guide component 130, the guide component 130 is prevented from being subjected to a large airflow impact load, which protects the guide component 130 and extends its service life.

[0036] Specifically, the guiding effect weakens when the guide surface 131 is close to the target part 1111; the guiding effect strengthens when the guide surface 131 is far away from the target part 1111. The guiding effect is strongest when the guide surface 131 is far away from the target part 1111 to the state corresponding to the maximum windproof effect, at which point the bypass airflow is guided to the blade body 120 to the maximum extent. Under high wind speed conditions, the distance between the guide surface 131 and the target part 1111 can be appropriately reduced to ensure the guiding effect while avoiding excessive load on the guide component 130; under low wind speed conditions, the distance between the guide surface 131 and the target part 1111 can be increased to maximize the utilization efficiency of the bypass airflow.

[0037] In some embodiments, the guide member 130 can be rotatably connected to the windward surface 111 by means of pivoting, hinge connection or other means.

[0038] like Figure 2 As shown, the wind turbine blade 100 may also include a drive mechanism 140, which is connected between the guide surface 131 and the target portion 1111.

[0039] It should be noted that the drive mechanism 140 can drive the guide component 130 to rotate relative to the windward surface 111. By controlling the drive mechanism 140, the distance between the guide surface 131 and the target part 1111 can be actively adjusted. This allows for accurate adjustment of the distance between the guide surface 131 and the target part 1111 according to the wind speed. In this way, the guide component 130 can be prevented from passively swinging back and forth under the impact of airflow, thus effectively improving the guiding effect of the guide component 130.

[0040] In some embodiments, the drive mechanism 140 may be hydraulically driven, electrically driven, or otherwise. A hydraulically driven mechanism can output a large driving force and maintain the position of the guide member 130 relatively well under airflow impact loads; an electrically driven mechanism has advantages such as fast response and high control precision.

[0041] like Figure 2 As shown, the drive mechanism 140 includes a first seat 141, a second seat 142, and a telescopic member 143 with adjustable length. The first seat 141 is connected to the guide surface 131, the second seat 142 is connected to the target part 1111, and the two opposite ends of the telescopic member 143 are rotatably connected to the first seat 141 and the second seat 142, respectively.

[0042] It should be noted that when the length of the telescopic component 143 changes, the telescopic component 143 causes the first seat 141 and the second seat 142 to undergo relative displacement, thereby causing the guide component 130 to rotate relative to the windward surface 111. In practical applications, by controlling the length of the telescopic component 143, the distance between the guide surface 131 and the target part 1111 can be precisely controlled.

[0043] It should be noted that since the two ends of the telescopic member 143 are rotatably connected to the first seat 141 and the second seat 142 respectively, when the length of the telescopic member 143 changes, the two ends of the telescopic member 143 can adapt to the change in the length of the telescopic member 143 by rotating, avoiding jamming and making the rotation process of the guide member 130 smooth and stable.

[0044] In some embodiments, the distance between the guide surface 131 and the target portion 1111 can be continuously adjusted by the length of the telescopic member 143. The greater the length of the telescopic member 143, the farther the guide surface 131 is from the target portion 1111, the greater the distance between the guide surface 131 and the target portion 1111, the stronger the interception effect of the guide surface 131 on the airflow, and the greater the airflow impact load on the guide member 130. Conversely, the smaller the length of the telescopic member 143, the closer the guide surface 131 is to the target portion 1111, the smaller the distance between the guide surface 131 and the target portion 1111, the weaker the interception effect of the guide surface 131 on the airflow, and the smaller the airflow impact load on the guide member 130. In this way, the control system can adjust the length of the telescopic member 143 in real time according to actual wind speed changes, avoiding the problem of insufficient guiding effect or excessive load on the guide member 130 at a fixed position due to wind speed fluctuations.

[0045] In some embodiments, a first seat 141 is fixedly disposed on a guide surface 131, providing a reliable force-bearing fulcrum for the guide member 130. A second seat 142 is fixedly disposed at the target location 1111, forming a mutually cooperating motion fulcrum with the first seat 141.

[0046] In some embodiments, the telescopic member 143 can be a hydraulic cylinder. The angle adjustment of the guide member 130 relative to the guide shield 110 is achieved by the extension and retraction of the hydraulic cylinder. The hydraulic cylinder can output a sufficiently large driving force, suitable for driving the guide member 130 to rotate under high-speed wind conditions. In other embodiments, the telescopic member 143 can also be a pneumatic cylinder, an electric cylinder, etc.

[0047] In some embodiments, a portion of the target portion 1111 is recessed to form a receiving groove, and the second seat 142 is located in the receiving groove. When the telescopic member 143 is shortened to its minimum length, the telescopic member 143 and the first seat 141 can also enter the receiving groove. In this way, the distance between the guide surface 131 and the target portion 1111 can be minimized, so that the guide surface 131 and the target portion 1111 are completely in contact, thereby minimizing the airflow impact load on the guide member 130 under high wind speed conditions and effectively protecting the guide member 130.

[0048] like Figure 1As shown, the guide surface 131 extends from the center of the shroud 110 to the blade root region of the blade body 120. In this way, the guide surface 131 can continuously guide the bypass airflow to the blade root region of the blade body 120, so that the bypass airflow superimposes with the main airflow in the blade root region and further acts on the blade body 120, which helps to improve the continuity of airflow guidance and reduce energy loss in the guidance path.

[0049] It should be noted that the root region of the blade body 120 is typically designed in a cylindrical shape, resulting in limited effective lift. Therefore, by using the guide surface 131 at the root region of the blade body 120, the airflow in the root region of the blade body 120 can be guided to the blade body region, thereby making full use of the airflow in the root region of the blade body 120 and further improving the wind energy utilization coefficient.

[0050] Figure 3 This is a schematic diagram of the structure of a flow guide provided in an exemplary embodiment of this application from a first-view perspective. Figure 1 and Figure 3 As shown, along the direction from the center to the edge of the fairing 110 (reference) Figure 3 In the direction indicated by the middle arrow X, the thickness of the guide 130 (refer to...) Figure 3 The spacing indicated by A gradually increases. This allows the guide element 130 to have a larger cross-sectional thickness in the edge region near the blade body 120 where wind pressure is concentrated. This improves the structural stiffness and bending resistance of this region, and makes the airflow impact load on the guide element 130 more evenly transmitted and dispersed from the center to the edge of the guide shield 110. This prevents stress concentration and structural deformation caused by low local stiffness of the guide element 130, and effectively improves the overall structural strength and reliability of the guide element 130.

[0051] Figure 4 This is a schematic diagram of the structure of a flow guide provided in an exemplary embodiment of this application from a second perspective. Figure 1 and Figure 4 As shown, along the direction from the center to the edge of the fairing 110 (reference) Figure 4 In the direction indicated by the middle arrow X, the width of the guide surface 131 (refer to...) Figure 3The spacing indicated by B gradually increases. This allows the guide surface 131 to have a larger frontal area on the side closest to the blade body 120, enabling it to intercept and guide more bypass airflow that would otherwise bypass the deflector 110, thus improving the effective utilization rate of the bypass airflow. At the same time, the gradually increasing width of the guide surface 131 makes the transition between different parts of the guide surface 131 smoother. When the airflow flows along the guide surface 131 towards the blade body 120, it is less likely to generate local vortices due to sudden changes in cross-section, and can reach the blade body 120 more stably and smoothly, thereby enhancing the guiding effect of the guide surface 131.

[0052] In some embodiments, the guide surface 131 is constructed as a streamlined curved surface. The transitions of the streamlined curved surface are continuous and smooth. The streamlined curved surface can reduce the flow resistance of the bypass airflow on the guide surface 131, so that the bypass airflow can be smoothly and stably guided to the blade body 120 by the guide surface 131, effectively improving the guiding effect, reducing aerodynamic losses, and improving the utilization rate of the bypass airflow.

[0053] like Figure 1 As shown, the number of guide elements 130 is the same as the number of blade bodies 120, and they correspond one-to-one. Multiple guide elements 130 are distributed circumferentially along the shroud 110, and each guide element 130 is used to guide the bypass airflow to the corresponding blade body 120.

[0054] It should be noted that during the rotation of multiple blade bodies 120, each blade body 120 has a corresponding guide 130 to provide bypass airflow, ensuring that each blade body 120 obtains a relatively balanced lift increase and ensuring the stability of multiple blade bodies 120 during the rotation process.

[0055] It should be noted that each guide element 130 mainly guides the bypass airflow to the corresponding blade body 120, and can also reduce the risk of large differences in wind speed caused by mutual interference between different blade bodies 120 due to the guided airflow, thus ensuring the stability of multiple blade bodies 120 during rotation.

[0056] In some embodiments, the number of blade bodies 120 can be three, four, five, etc.; correspondingly, the number of guide members 130 can be three, four, five, etc.

[0057] like Figure 1 As shown, the wind turbine blade 100 may include a wind speed sensor 150, which is mounted on the blade body 120.

[0058] It should be noted that the wind speed sensor 150 can acquire wind speed information on the surface of the blade body 120 in real time. Based on the wind speed information detected by the wind speed sensor 150, the wind speed of the current environment can be determined, providing an accurate and reliable basis for the dynamic adjustment of the control guide 130 rotation, so that the distance between the guide surface 131 and the target part 1111 can respond in a timely manner according to the actual airflow conditions received by the blade body 120. For example, when the wind speed detected by the wind speed sensor 150 increases, the control system can control the guide member 130 to rotate in the direction of reducing the distance between the guide surface 131 and the target part 1111 (the guide surface 131 gradually moves closer to the target part 1111) to reduce the airflow impact load on the guide member 130; when the wind speed detected by the wind speed sensor 150 decreases, the control system can control the guide member 130 to rotate in the direction of increasing the distance between the guide surface 131 and the target part 1111 (the guide surface 131 gradually moves away from the target part 1111) to enhance the interception of bypass airflow and improve the diversion effect.

[0059] In some embodiments, each blade body 120 is provided with a wind speed sensor 150, which can detect the surface wind speed of the corresponding blade body 120.

[0060] In some embodiments, the wind speed sensor 150 may be disposed in the tip region of the blade body 120; or, it may be disposed in the root region of the blade body 120; or, it may be disposed in the blade body region of the blade body 120 (located between the tip region and the root region).

[0061] In some embodiments, the number of wind speed sensors 150 can be multiple, arranged at intervals along the spanwise direction of the blade body 120, for example, respectively located in the blade root region, blade body region, and blade tip region. By synchronously collecting surface wind speeds at different spanwise positions using multiple wind speed sensors 150, the surface wind speed situation of the blade body 120 can be more comprehensively reflected, avoiding measurement deviations caused by local airflow disturbances or sensor failures. The control system can perform comprehensive processing on the data collected by multiple wind speed sensors 150, such as calculating the average value or weighted average value. The wind speed value after comprehensive processing can be used as the effective surface wind speed value of the guide element 130. In this way, the comprehensiveness and reliability of the surface wind speed detection data can be further improved, providing a more comprehensive and reliable basis for the dynamic adjustment of the guide element 130.

[0062] This application embodiment also provides a wind turbine generator set, which includes a body and wind turbine blades 100 as described in the previous embodiment, with the wind turbine blades 100 disposed on the body.

[0063] In some embodiments, the body may be the nacelle and tower structure of a wind turbine generator set used to support the wind turbine blades 100.

[0064] The wind turbine generator set provided in this application embodiment has all the functions of the wind turbine blade 100, and its beneficial effects can be referred to the beneficial effects of the wind turbine blade 100 mentioned above.

[0065] Figure 5 This is a schematic flowchart illustrating a flow guide control method provided for an exemplary embodiment of this application. Figure 5 As shown, the guide vane control method provided in this application embodiment is applied to the wind turbine blade 100 as described in the previous embodiment. Specifically, the guide vane control method may include: S610: Acquire the surface wind speed of the blade body detected by the wind speed sensor.

[0066] S620: Controls the rotation of the guide relative to the windward surface based on the surface wind speed; wherein, the distance between the guide surface and the target part is negatively correlated with the surface wind speed.

[0067] It should be noted that the surface wind speed of the blade body obtained in step S610 can be understood as the effective wind speed formed by the superposition of the main airflow and the bypass airflow on the surface of the blade body 120.

[0068] It should be noted that the "distance between the guide surface 131 and the target part 1111" in this embodiment is used to reflect the degree of proximity or distance between the guide surface 131 and the target part 1111. Specifically, the distance can be the minimum distance between the relative areas of the guide surface 131 and the target part 1111, or a preset reference point can be selected on the guide surface 131, and the straight-line distance between the preset reference point and the corresponding point on the target part 1111 can be used as the distance.

[0069] It should be noted that the distance between the guide surface 131 and the target part 1111 is negatively correlated with the surface wind speed. That is, the higher the surface wind speed, the smaller the distance between the guide surface 131 and the target part 1111; the lower the surface wind speed, the larger the distance between the guide surface 131 and the target part 1111.

[0070] Specifically, when the detected surface wind speed increases, the guide element 130 is controlled to rotate in the direction of reducing the distance between the guide surface 131 and the target part 1111. The guide surface 131 gradually moves closer to the target part 1111, reducing the airflow impact load on the guide element 130 and preventing the guide element 130 from bearing excessive load in high wind speed conditions, thus reducing the risk of damage to the guide element 130. When the detected surface wind speed decreases, the guide element 130 is controlled to rotate in the direction of increasing the distance between the guide surface 131 and the target part 1111. The guide surface 131 gradually moves away from the target part 1111, allowing the guide surface 131 to intercept more bypass airflow and guide it to the blade body 120, thereby increasing the effective wind speed and lift of the blade body 120 and maximizing the wind energy utilization coefficient.

[0071] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0072] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0073] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0074] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0075] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A wind turbine blade, characterized in that, include: The fairing has a windward side; Multiple blade bodies are distributed circumferentially along the guide fairing, and all of the multiple blade bodies are connected to the guide fairing; A flow guide has a flow guide surface rotatably connected to the windward surface so that the flow guide surface is relatively close to or away from a target portion of the windward surface; wherein the flow guide surface is used to guide bypass airflow that bypasses the flow guide to at least a portion of the blade body; the target portion is characterized as a portion of the windward surface that is disposed opposite to the flow guide surface.

2. The wind turbine blade according to claim 1, characterized in that, The wind turbine blades also include: A drive mechanism is connected between the guide surface and the target part, and the drive mechanism is used to drive the guide component to rotate relative to the windward surface.

3. The wind turbine blade according to claim 2, characterized in that, The drive mechanism includes: The first body is connected to the guide surface; The second body is connected to the target part; An adjustable telescopic component, wherein the opposite ends of the telescopic component are rotatably connected to the first base and the second base, respectively.

4. The wind turbine blade according to any one of claims 1 to 3, characterized in that, The guide surface extends from the center of the guide shield to the root region of the blade body.

5. The wind turbine blade according to any one of claims 1 to 3, characterized in that, The thickness of the flow guide gradually increases along the direction from the center to the edge of the flow guide.

6. The wind turbine blade according to any one of claims 1 to 3, characterized in that, The width of the guide surface gradually increases along the direction from the center to the edge of the guide shield.

7. The wind turbine blade according to any one of claims 1 to 3, characterized in that, The number of the flow guides is the same as the number of the blade bodies, and they correspond one-to-one; multiple flow guides are distributed circumferentially along the flow guide shroud, and each flow guide is used to guide the bypass airflow to the corresponding blade body.

8. The wind turbine blade according to any one of claims 1 to 3, characterized in that, The wind turbine blades include: A wind speed sensor is mounted on the blade body.

9. A wind turbine generator set, characterized in that, include: Organism; The wind turbine blades as described in any one of claims 1 to 8 are disposed on the body.

10. A method for controlling a flow guide, characterized in that, Applied to a wind turbine blade as described in any one of claims 1 to 8; the wind turbine blade includes a wind speed sensor disposed on the blade body; The flow guide control method includes: The surface wind speed of the blade body detected by the wind speed sensor is obtained. The guide element is controlled to rotate relative to the windward surface based on the surface wind speed; wherein the distance between the guide surface and the target part is negatively correlated with the surface wind speed.

Images