Flow guide synergistic device for improving power generation efficiency of fan

Abstract

The utility model discloses a flow guide synergistic device for improving the power generation efficiency of a fan, and belongs to the field of fan power generation. The flow guide synergistic device comprises a mounting frame, and a flow guide assembly and an adjusting assembly which are arranged on the mounting frame; the flow guide assembly comprises a plurality of flow guide blades, and the ends, close to the mounting frame, of the flow guide blades are fixedly connected with rotating shafts rotationally connected with the mounting frame. The adjusting assembly comprises a driving bevel gear rotationally arranged in the mounting frame, one end of the rotating shaft extends out of the mounting frame and is fixedly connected with a driven bevel gear, a driving motor is fixedly mounted on one side of the mounting frame, and an output shaft of the driving motor penetrates through the mounting frame and is fixedly connected with the driving bevel gear. By arranging the rotatable guide vanes and the adjusting assembly, the angles of the guide vanes can be automatically adjusted according to different environmental factors such as wind speeds and wind directions, airflow can flow through the fan impeller at the optimal angle and speed, the utilization efficiency of the airflow is improved, and therefore the power generation efficiency of the fan is effectively improved.

Description

Technical Field

[0001] This application relates to the field of wind turbine power generation technology, specifically a flow-guiding efficiency enhancement device for improving wind turbine power generation efficiency. Background Technology

[0002] In wind power generation systems, the wind turbine rotor's efficiency in capturing wind energy directly determines the power generation capacity, while the speed, stability, and directional consistency of the airflow passing through the rotor are key influencing factors. As an airflow control component at the front end of the wind turbine, the core function of the flow guide device is to improve the aerodynamic efficiency of the rotor by guiding the airflow to form a stable flow field.

[0003] Existing wind turbine airflow guiding devices are usually fixed in structure and difficult to adapt to different environmental factors such as wind speed and wind direction, resulting in poor airflow guiding effect and the wind turbine impeller cannot make full use of wind energy.

[0004] Therefore, this application provides a flow-guiding efficiency enhancement device for improving the power generation efficiency of wind turbines to solve the above-mentioned problems. Utility Model Content

[0005] This application provides a flow guide efficiency enhancement device for improving wind turbine power generation efficiency, aiming to solve the problems mentioned in the background art, such as fixed structure of existing wind turbine flow guide devices, difficulty in dynamically adjusting the flow guide angle according to wind speed / direction, low airflow guidance efficiency, and insufficient wind energy utilization.

[0006] To achieve the above objectives, this application provides the following technical solution: a flow guiding efficiency enhancement device for improving wind turbine power generation efficiency, comprising a mounting frame for installation in front of the wind turbine impeller and a flow guiding component and an adjustment component disposed on the mounting frame;

[0007] To improve the airflow guiding effect: the airflow guiding assembly includes multiple airflow guiding blades, which are evenly distributed along the circumference of the mounting frame. Each airflow guiding blade is fixedly connected to a rotating shaft that is rotatably connected to the mounting frame at one end. The airflow guiding blade can rotate around the rotating shaft in a vertical plane. The even distribution of multiple airflow guiding blades along the circumference of the mounting frame allows for omnidirectional airflow guiding. The blades can adjust their angle in the vertical plane via the rotating shaft, dynamically adjusting their attitude according to real-time wind speed and direction. This guides the airflow to the impeller at the optimal angle and speed, reducing airflow separation and vortex formation, significantly improving the stability and directional consistency of the impeller inflow, thereby increasing wind energy capture efficiency.

[0008] To facilitate the adjustment of the guide vane angle, the adjustment assembly includes a driving bevel gear rotatably mounted inside the mounting frame. One end of the rotating shaft extends out of the mounting frame and is fixedly connected to a driven bevel gear, which meshes with the driving bevel gear. A drive motor is fixedly mounted on one side of the mounting frame, and the output shaft of the drive motor passes through the mounting frame and is fixedly connected to the driving bevel gear. The drive motor, through the meshing of the driving and driven bevel gears, achieves synchronous adjustment of the angles of multiple guide vanes, avoiding the complex structure of independently driving individual vanes. Gear transmission features high transmission efficiency and strong stability, ensuring the accuracy of angle adjustment and response speed, providing a reliable mechanical basis for the adaptive control of the device.

[0009] Preferably, the mounting bracket is ring-shaped. The ring-shaped mounting bracket can surround the front end of the fan impeller to form a ring-shaped flow channel, so that the airflow converges evenly from the periphery of the mounting bracket to the center, preventing the airflow from being lost from the edge of the impeller, significantly increasing the contact area and concentration of the airflow with the impeller, and providing a stable initial flow field basis for the guidance of the subsequent guide vanes.

[0010] Preferably, to facilitate the installation of the mounting bracket, the edge of the mounting bracket is provided with multiple mounting holes for fixed connection with the fan frame by bolts. The mounting holes make the connection between the mounting bracket and the fan frame more convenient and reliable. The bolt fixing ensures that the mounting bracket will not shift or loosen in strong wind environments, ensuring the relative position stability of the flow guide device and the impeller, and avoiding flow guide failure caused by structural shaking.

[0011] Preferably, the surface of the guide vane is a streamlined curved surface. The streamlined curved surface can conform to the principles of aerodynamics, significantly reduce the frictional drag and pressure drag when the airflow passes through the vane, reduce the separation and turbulence of the airflow on the vane surface, and enable the airflow to complete the direction adjustment with lower energy consumption, further improving the guiding efficiency. Combined with the angle adjustment function, it can achieve the dual optimization of "drag reduction and efficiency improvement".

[0012] Preferably, to ensure good airflow guidance, the number of guide vanes is 6 to 12. A reasonable number of vanes strikes a balance between airflow guidance and aerodynamic drag: too few vanes will result in insufficient flow field adjustment and easy leakage of airflow in the edge areas; too many vanes will increase interference between vanes and increase overall wind resistance.

[0013] Preferably, the adjustment assembly further includes an angle sensor and a controller. The angle sensor is mounted on the rotating shaft, and the controller is electrically connected to the drive motor and the angle sensor. The angle sensor monitors the rotation angle of the guide vanes in real time, and the controller dynamically adjusts the rotation of the drive motor in conjunction with a preset control strategy to achieve closed-loop automatic control of the guide vane angle. This feedback system requires no manual intervention, can quickly respond to changes in the wind field, and significantly improves the adaptive adjustment accuracy and reliability of the device.

[0014] This application, by setting rotatable guide vanes and adjustment components, can automatically adjust the angle of the guide vanes according to different environmental factors such as wind speed and wind direction, so that the airflow can flow through the wind turbine impeller at the optimal angle and speed, thereby improving the utilization efficiency of the airflow and effectively improving the power generation efficiency of the wind turbine.

[0015] This application Attached Figure Description

[0016] Figure 1 A schematic diagram of a flow-guiding efficiency enhancement device for improving the power generation efficiency of wind turbines;

[0017] Figure 2 This is a schematic diagram of the internal structure of the mounting bracket;

[0018] Figure 3 This is a structural plan view showing the connection between the flow guiding component and the regulating component.

[0019] In the picture:

[0020] 1. Mounting bracket; 11. Mounting hole; 2. Flow guide assembly; 21. Flow guide vane; 22. Rotating shaft; 3. Adjustment assembly; 31. Driving bevel gear; 32. Driven bevel gear; 33. Drive motor; 34. Angle sensor. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] Example 1

[0023] This embodiment provides a flow-guiding efficiency enhancement device for improving wind turbine power generation efficiency, such as... Figure 1-3 As shown, the flow-guiding and efficiency-enhancing device includes a mounting frame 1 for installation in front of the wind turbine impeller, and a flow-guiding assembly 2 and an adjustment assembly 3 disposed on the mounting frame 1.

[0024] To improve the airflow guiding effect, the airflow guiding component 2 includes multiple airflow guiding blades 21, which are evenly distributed along the circumference of the mounting frame 1. One end of each airflow guiding blade 21 near the mounting frame 1 is fixedly connected to a rotating shaft 22, which is rotatably connected to the mounting frame 1. The airflow guiding blades 21 can rotate around the rotating shaft 22 in a vertical plane. The even distribution of multiple airflow guiding blades along the circumference of the mounting frame 1 allows for omnidirectional airflow guiding. The blades can adjust their angle in the vertical plane via the rotating shaft 22, dynamically adjusting their attitude according to real-time wind speed and direction. This guides the airflow to the impeller at the optimal angle and speed, reducing airflow separation and vortices, significantly improving the stability and directional consistency of the impeller inflow, thereby increasing wind energy capture efficiency. When external wind field parameters (such as wind speed and direction) change, the adjustment component 3 drives the rotating shaft 22 to rotate, causing the airflow guiding blades 21 to rotate around the rotating shaft 22. The change in blade angle alters the airflow incident angle and the flow channel cross-section, causing the airflow to form a flow field distribution on the blade surface that conforms to the aerodynamic characteristics of the impeller. For example, at low wind speeds, the blade angle of attack is increased to accelerate the airflow, while at high wind speeds, the angle of attack is decreased to avoid overload, ultimately achieving flow field optimization.

[0025] To facilitate the adjustment of the angle of the guide vanes 21, the adjustment assembly 3 includes a driving bevel gear 31 rotatably mounted inside the mounting frame 1. One end of the rotating shaft 22 extends out of the mounting frame 1 and is fixedly connected to a driven bevel gear 32, which meshes with the driving bevel gear 31. A drive motor 33 is fixedly mounted on one side of the mounting frame 1, and the output shaft of the drive motor 33 passes through the mounting frame 1 and is fixedly connected to the driving bevel gear 31. The drive motor 33 achieves synchronous adjustment of the angles of multiple guide vanes 21 through the meshing of the driving bevel gear 31 and the driven bevel gear 32, avoiding the complex structure of driving a single vane independently. Gear transmission has the characteristics of high transmission efficiency and strong stability, ensuring the accuracy of angle adjustment and response speed, and providing a reliable mechanical basis for the adaptive control of the device. The output shaft of the drive motor 33 drives the driving bevel gear 31 to rotate, and the driving bevel gear 31 drives the driven bevel gear 32 to rotate through the meshing relationship. The driven bevel gear 32 is fixedly connected to the rotating shaft 22, thereby driving the guide vanes 21 to rotate synchronously. This transmission mechanism converts the rotational motion of the motor into the angle adjustment of the blades, and utilizes the orthogonal transmission characteristics of bevel gears to achieve the linkage control of multiple blades within a limited space.

[0026] The mounting bracket 1 is ring-shaped. This ring-shaped structure surrounds the front end of the fan impeller, forming a ring-shaped flow channel. This allows airflow to converge evenly from the periphery of the mounting bracket 1 towards the center, preventing airflow loss from the impeller edges. This significantly increases the contact area and concentration between the airflow and the impeller, providing a stable initial flow field foundation for the subsequent guidance of the guide vanes 21. The mounting bracket 1, through its ring design, is fitted in front of the fan impeller. When airflow flows in from the front of the fan, the inner wall of the ring structure constrains the dispersed airflow, forcing it to concentrate towards the central area, forming a converging flow field radially along the mounting bracket 1. This provides more uniform incoming flow conditions for adjusting the angle of the guide vanes 21.

[0027] To facilitate the installation of mounting bracket 1, multiple mounting holes 11 are provided on the edge of mounting bracket 1 for fixed connection with the fan frame via bolts. The mounting holes 11 make the connection between mounting bracket 1 and the fan frame more convenient and reliable. Bolt fixing ensures that mounting bracket 1 will not shift or loosen in strong winds, guaranteeing the relative position stability of the flow guide device and impeller, and avoiding flow guide failure due to structural sway. During installation, bolts are passed through the mounting holes 11 and screwed into the corresponding threaded holes on the fan frame. The preload of the bolts tightly fits mounting bracket 1 with the frame, forming a rigid connection. During fan operation, the tightening effect of the bolts counteracts the impact force of the airflow on mounting bracket 1, maintaining the positional accuracy of the flow guide device.

[0028] The surface of the guide vane 21 is a streamlined curved surface. This streamlined surface conforms to aerodynamic principles, significantly reducing frictional and pressure drag as airflow passes over the vane, minimizing airflow separation and turbulence on the vane surface, allowing airflow to adjust direction with lower energy consumption, further improving guiding efficiency. Combined with the angle adjustment function, it achieves a dual optimization of "drag reduction and efficiency enhancement." The geometry of the streamlined surface (such as a rounded leading edge and a sharp trailing edge) conforms to aerodynamic design principles such as NACA airfoils, maintaining a laminar boundary layer as airflow passes over it, delaying the appearance of separation points, and resulting in a more uniform pressure distribution on the vane surface. Compared to flat plates or non-streamlined structures, the streamlined surface reduces airflow drag, thereby reducing energy loss during the guiding process.

[0029] To ensure good airflow guidance, the number of guide vanes 21 is 6 to 12, preferably 8. A reasonable number of vanes strikes a balance between airflow guidance and aerodynamic drag: too few vanes (e.g., <6) will result in insufficient flow field adjustment and easy leakage of airflow in the edge areas; too many vanes (e.g., >12) will increase interference between vanes and increase overall wind resistance. With 8 vanes, the circumference of the mounting frame 1 can be evenly covered, forming a symmetrical and stable airflow field, while avoiding aerodynamic interference caused by overly dense vanes. When the vanes are evenly distributed along the circumference, each vane is responsible for guiding airflow in a specific area. The 45° interval between the 8 vanes ensures that the airflow range of adjacent vanes neither overlaps nor misses any areas, forming a continuous annular airflow barrier. This number setting ensures that the velocity and pressure gradients in all directions tend to be consistent when the airflow passes through the vane array, ultimately forming uniform and stable inflow conditions at the impeller inlet.

[0030] The adjustment component 3 also includes an angle sensor 34 and a controller. The angle sensor 34 is mounted on the rotating shaft 22, and the controller is electrically connected to the drive motor 33 and the angle sensor 34. The angle sensor 34 monitors the rotation angle of the guide vanes 21 in real time. The controller dynamically adjusts the rotation of the drive motor 33 by combining preset control strategies (such as wind speed-angle mapping models and wind direction compensation algorithms) to achieve closed-loop automatic control of the guide angle. This feedback system requires no manual intervention, can quickly respond to changes in the wind field, and significantly improves the adaptive adjustment accuracy and reliability of the device. The angle sensor 34 is mounted on the rotating shaft 22 and outputs angle signals (such as voltage and pulse signals) in real time as the blades rotate. After the signal is transmitted to the controller, the controller compares the current angle with the target angle calculated based on parameters such as wind speed and wind direction. It generates motor drive commands through algorithms such as PID control, driving the motor 33 to rotate forward and backward or adjust its speed until the blade angle reaches the target value, forming a closed-loop control process of "detection-calculation-control-feedback".

[0031] The wiring diagram of the drive motor 33 in this utility model is common knowledge in the field. Its working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the drive motor 33 will not be explained in detail.

[0032] The control method of this application is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0033] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0034] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A flow-guiding efficiency enhancement device for improving wind turbine power generation efficiency, characterized in that: It includes a mounting bracket (1) for mounting in front of the wind turbine impeller and a flow guiding assembly (2) and an adjustment assembly (3) disposed on the mounting bracket (1). The flow guiding assembly (2) includes multiple flow guiding blades (21), which are evenly distributed along the circumferential direction of the mounting frame (1). The end of the flow guiding blade (21) near the mounting frame (1) is fixedly connected to a rotating shaft (22) that is rotatably connected to the mounting frame (1). The flow guiding blade (21) can rotate around the rotating shaft (22) in a vertical plane. The adjustment assembly (3) includes an active bevel gear (31) rotatably disposed inside the mounting frame (1), one end of the rotating shaft (22) extends out of the mounting frame (1) and is fixedly connected to a driven bevel gear (32), the driven bevel gear (32) meshes with the active bevel gear (31), a drive motor (33) is fixedly mounted on one side of the mounting frame (1), the output shaft of the drive motor (33) passes through the mounting frame (1) and is fixedly connected to the active bevel gear (31).

2. The wind turbine power generation efficiency improvement device according to claim 1, characterized in that: The mounting bracket (1) is ring-shaped.

3. The wind turbine power generation efficiency improvement device according to claim 1, characterized in that: The edge of the mounting bracket (1) is provided with a plurality of mounting holes (11) for fixing to the frame of the fan by bolts.

4. The wind turbine power generation efficiency improvement device according to claim 1, characterized in that: The surface of the guide vane (21) is a streamlined curved surface.

5. The wind turbine power generation efficiency improvement device according to claim 1, characterized in that: The number of the guide vanes (21) is 6 to 12.

6. The wind turbine power generation efficiency improvement device according to claim 1, characterized in that: The adjustment assembly (3) also includes an angle sensor (34) and a controller. The angle sensor (34) is mounted on the rotating shaft (22), and the controller is electrically connected to the drive motor (33) and the angle sensor (34).

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