A flow guiding device and method for a wind turbine

Abstract

The present invention discloses a flow guiding device and method for a wind turbine, which includes a wind turbine main body, a front fairing and a rear fairing. A flow guiding assembly, a limiting assembly and an adjusting assembly are arranged inside the front fairing. The wind turbine main body includes a tower barrel, a generating motor and blades. The generating motor is installed inside the rear fairing, the blades are installed on the front fairing, and the rear fairing is installed at the upper end of the tower barrel and is movably connected thereto. Filter meshes are arranged on the rear end face of the front fairing and the front end face of the rear fairing. The flow guiding assembly includes a flow guiding plate, a tension spring and a fixing frame. An air inlet is arranged on the side face of the front fairing, and the flow guiding assembly is installed inside the air inlet. The limiting assembly includes a limiting sleeve, a first compression spring and a piston rod. The present invention has the advantages of high stability and safety, and solves the problem that in the prior art, when the wind turbine encounters strong wind suddenly, the generating motor is easily damaged due to overload.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbines, and specifically to a flow guiding device and method for a wind turbine. Background Art

[0002] Wind power generation, as a clean and renewable energy source, has been widely applied and developed globally. However, in practical applications, wind turbines face various challenges.

[0003] The efficiency of wind turbines is greatly affected by wind speed. Especially under low wind speed conditions, the power generation efficiency decreases significantly. In addition, excessive wind speed may cause the generator components to be overloaded and even damaged. A large amount of heat is generated during the operation of the generator. If not dissipated in time, it may cause the motor to overheat, affecting its service life and working efficiency.

[0004] Under extreme weather conditions, such as strong winds or gusts, wind turbines need to have good self-regulating capabilities to maintain a stable operating state and avoid equipment failures caused by changes in external conditions. Traditional wind turbines use motors to drive the blades to rotate to control the rotational speed of the generator. However, this mechanism is complex, resulting in high costs, and the electronic components are easily damaged and difficult to maintain. Under extreme weather conditions, the pitch adjustment system may not be able to respond immediately, leading to a decrease in power generation efficiency or equipment damage. Therefore, a flow guiding device and method for a wind turbine are needed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a flow guiding device and method for a wind turbine, which have the advantages of high stability and safety, and solve the problem that the generator of the existing wind turbine is easily overloaded and damaged when encountering strong winds.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A flow guiding device for a wind turbine, comprising a wind turbine main body, a front fairing, and a rear fairing. A flow guiding component, a limiting component, and an adjusting component are arranged inside the front fairing;

[0007] The wind turbine main body includes a tower barrel, a generator, and blades. The generator is installed inside the rear fairing, the blades are installed on the front fairing, the rear fairing is installed at the upper end of the tower barrel and is movably connected thereto. Filter meshes are provided on the rear end face of the front fairing and the front end face of the rear fairing;

[0008] The flow guiding component includes a flow guiding plate, a tension spring, and a fixing frame. An air inlet is provided on the side surface of the front fairing, and the flow guiding component is installed inside the air inlet;

[0009] The limiting component includes a limiting sleeve, a first compression spring, and a piston rod. The limiting component is installed on the fixed frame.

[0010] The adjusting component includes a central shaft sleeve, a lead screw, and a slider. The adjusting component is fixedly installed at the center of the front fairing.

[0011] Preferably, as a flow guiding device of a wind turbine of the present invention, the fixed frame is fixedly installed on the inner end face of the front fairing. A first rotating shaft is provided on the fixed frame, a first shaft hole cooperating with it is provided on the flow guiding plate, a first ear plate is provided on the slider, a second ear plate is provided on the flow guiding plate, and the front and rear ends of the tension spring are respectively fixedly connected to the first ear plate and the second ear plate.

[0012] Preferably, as a flow guiding device of a wind turbine of the present invention, a sealing cover cooperating with the air inlet is provided at the top of the flow guiding plate, and a flow guiding groove is provided on the side of the flow guiding plate. The flow guiding groove is a plurality of uniformly arranged arc-shaped notches.

[0013] Preferably, as a flow guiding device of a wind turbine of the present invention, the piston rod is inserted into the limiting sleeve and elastically connected to it through the first compression spring. A limiting sliding groove cooperating with the limiting sleeve is provided on the side of the flow guiding plate, and the front end of the limiting sleeve is a spherical top structure.

[0014] Preferably, as a flow guiding device of a wind turbine of the present invention, the limiting sliding groove includes a first positioning portion, a second positioning portion, and a guiding portion. The first positioning portion and the second positioning portion are semi-circular notches, and the radius of the first positioning portion is smaller than the radius of the limiting sleeve, the radius of the second positioning portion is equal to the radius of the limiting sleeve. The first positioning portion and the second positioning portion are respectively located at both ends of the upper end of the guiding portion, and a convex portion is formed between the first positioning portion and the guiding portion.

[0015] Preferably, as a flow guiding device of a wind turbine of the present invention, a second compression spring is provided on the first rotating shaft, a limiting cap is provided at the top of the rotating shaft, the flow guiding plate is elastically slidably connected to the fixed frame through the second compression spring, and a limiting flange is provided at the edge of the second positioning portion.

[0016] Preferably, as a flow guiding device of a wind turbine of the present invention, the lead screw is inserted into the central shaft sleeve and rotatably connected to it, the slider is inserted into the central shaft sleeve and slidably connected to it, the lead screw passes through the slider and is threadedly connected to it, and a second sliding groove cooperating with the first ear plate is provided on the central shaft sleeve.

[0017] Preferably, as a flow guiding device of a wind turbine of the present invention, a rocker is rotatably connected to the central shaft sleeve. The upper end surface of the rocker is slidably connected to the lower end surface of the flow guiding plate, and a counterweight ball is provided at the end of the rocker.

[0018] Preferably, as a flow guiding device of a wind turbine of the present invention, a clamping groove for cooperating with a tipping plate is provided at the bottom of the flow guiding plate, and universal balls are arranged in the clamping groove.

[0019] A flow guiding method for a wind turbine includes the following steps:

[0020] Step 1: When the blade drives the front fairing to rotate, the flow guiding plate unfolds under the influence of centrifugal force for flow guiding;

[0021] Step 2: The flow guiding plate guides the air flow from the air inlet into the front fairing, so that the air flow passes through the front fairing and enters the rear fairing to dissipate heat from the generator;

[0022] Step 3: Due to the unfolding of the flow guiding plate, the rotation resistance of the front fairing increases, thereby reducing the rotation speed of the front fairing, controlling the speed of the generator, and preventing overload;

[0023] Step 4: If the wind power weakens, the flow guiding plate will automatically retract under the action of the tension spring, and when the wind power strengthens, the flow guiding plate will unfold again, always maintaining the best power generation efficiency and safety.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. The present invention is provided with a flow guiding device in the front fairing. This device can automatically adjust the unfolding state of the flow guiding plate according to the change of wind speed. When the wind power weakens, the flow guiding plate will automatically retract under the action of the tension spring, reducing the wind resistance and increasing the rotation speed of the generator, thereby improving the power generation efficiency. When the wind power strengthens, the flow guiding plate will unfold again. After the flow guiding plate unfolds, more air flow can be introduced into the rear fairing to help dissipate heat from the generator, while increasing the wind resistance and reducing the rotation speed of the generator, avoiding the risk of overheating of the motor due to excessive power generation, so as to automatically adapt to different wind speed conditions and maintain the best working state of the wind turbine.

[0026] 2. The present invention cooperates the limiting component with the flow guiding component, so that when the wind turbine is at the limit rotation speed, with the cooperation of the tipping plate structure, the flow guiding plate can quickly jump out and unfold under the action of the tipping plate and its own centrifugal force and maintain the limit fixation, responding quickly, and being able to cope with extreme weather such as downburst. When the wind power is small enough, the flow guiding device will be retracted into the front fairing, thus avoiding the repeated bouncing or contraction of the flow guiding device and affecting the stability of the equipment operation.

[0027] 3. The present invention is provided with an adjusting component in the front fairing. The design of the lead screw and the slider enables the operator to adjust the initial length of the tension spring according to the actual situation, thereby changing the ejection threshold of the flow guiding plate to adapt to the requirements of different models of generators, enhancing the flexibility and applicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is an exploded view of the present invention;

[0030] Figure 3 is a side sectional view of the front fairing, the guiding component and the adjusting component in a cooperating state of the present invention;

[0031] Figure 4 is a schematic diagram of the guiding component, the limiting component and the adjusting component in a cooperating state of the present invention;

[0032] Figure 5 is an exploded view of the guiding plate and the fixing frame of the present invention;

[0033] Figure 6 is a schematic diagram of the structure of the guiding plate of the present invention;

[0034] Figure 7 is a rear sectional view of the guiding component, the limiting component and the adjusting component in a cooperating state of the present invention;

[0035] Figure 8 of the present invention Figure 7 is an enlarged view at A in;

[0036] Figure 9 of the present invention Figure 7 is a sectional view at B in;

[0037] Figure 10 is a schematic diagram of the structure of the front fairing of the present invention;

[0038] Figure 11 is a schematic diagram of the structure of the rear fairing of the present invention;

[0039] Figure 12 is a schematic diagram of the main structure of the wind turbine of the present invention.

[0040] In the figure: 1, wind turbine body; 101, blades; 102, generator motor; 103, tower; 2, front guide cover; 201, air inlet; 202, filter; 3, rear guide cover; 4, guide assembly; 401, guide plate; 4011, guide groove; 4012, sealing cover; 4013, limit slide groove; 40131, first positioning part; 40132, second positioning part; 40133, guide part; 40134, protrusion; 4014, slot; 4015, universal ball; 401 6. Second ear plate; 4017. Limiting flange; 4018. First axial hole; 402. Tension spring; 403. Fixing frame; 4031. First rotating shaft; 4032. Limiting cap; 4033. Second compression spring; 5. Limiting assembly; 501. Limiting sleeve; 502. First compression spring; 503. Piston column; 6. Adjusting assembly; 601. Center sleeve; 6011. Second slide groove; 602. Screw rod; 603. Sliding block; 6031. First ear plate; 604. Seesaw; 6041. Counterweight ball. DETAILED DESCRIPTION

[0041] Example 1

[0042] See also Figures 1-12 A wind turbine guide device comprises a wind turbine body 1, a front guide cover 2 and a rear guide cover 3, wherein a guide component 4, a limit component 5 and an adjustment component 6 are arranged in the front guide cover 2;

[0043] The wind turbine body 1 includes a tower 103, a generator 102 and blades 101. The generator 102 is installed in the rear air guide 3, and the blades 101 are installed on the front air guide 2. The rear air guide 3 is installed at the upper end of the tower 103 and is movably connected thereto. The rear end surface of the front air guide 2 and the front end surface of the rear air guide 3 are provided with a filter 202.

[0044] The air guide assembly 4 includes an air guide plate 401, a tension spring 402 and a fixing frame 403. An air inlet 201 is provided on the side of the front air guide cover 2, and the air guide assembly 4 is installed in the air inlet 201;

[0045] The limiting assembly 5 includes a limiting sleeve 501, a first compression spring 502 and a piston rod 503, and the limiting assembly 5 is installed on the fixing frame 403;

[0046] The adjustment component 6 includes a central sleeve 601 , a screw rod 602 and a slider 603 . The adjustment component 6 is fixedly installed at the center of the front air duct 2 .

[0047] When the blade 101 drives the front fairing 2 to rotate, the deflector 401 is affected by the centrifugal force and unfolds for guiding the flow. The deflector 401 guides the air flow from the air inlet 201 into the front fairing 2, so that the air flow passes through the front fairing 2 and enters the rear fairing 3 to dissipate heat from the power generation motor 102. Due to the unfolding of the deflector 401, the rotation resistance of the front fairing 2 increases, thereby reducing the rotation speed of the front fairing 2, controlling the speed of the power generation motor 102, and preventing overload. If the wind power weakens, the deflector 401 will automatically retract under the action of the tension spring 402, and when the wind power strengthens, the deflector 401 will unfold again, always maintaining the best power generation efficiency and safety.

[0048] Further, the fixing frame 403 is fixedly installed on the inner end face of the front fairing 2. A first rotating shaft 4031 is provided on the fixing frame 403. A first shaft hole 4018 cooperating therewith is provided on the deflector 401. A first ear plate 6031 is provided on the slider 603. A second ear plate 4016 is provided on the deflector 401. The front and rear ends of the tension spring 402 are respectively fixedly connected to the first ear plate 6031 and the second ear plate 4016.

[0049] The deflector 401 can rotate around the first rotating shaft 4031 under the action of its own centrifugal force. When the front fairing 2 rotates at a high speed, the deflector 401 can be fully unfolded, so as to guide the air flow into the front fairing 2, make the air flow pass through the front fairing 2 and enter the rear fairing 3 to dissipate heat from the power generation motor 102, avoid excessive power generation and damage to the power generation motor 102, and can increase the wind resistance of the front fairing 2, reduce the rotation speed of the power generation motor 102, and avoid its overload damage.

[0050] Further, a sealing cover 4012 cooperating with the air inlet 201 is provided at the top of the deflector 401. A flow guiding groove 4011 is provided on the side surface of the deflector 401. The flow guiding groove 4011 is a plurality of uniformly arranged arc-shaped notches.

[0051] The sealing cover 4012 is used to prevent excessive gaps at the air inlet 201 after the deflector 401 is retracted into the front fairing 2, which may cause dust collection in the front fairing 2 or make the surface of the front fairing 2 uneven, increasing the wind resistance of the front fairing 2 and affecting its power generation power under light wind conditions.

[0052] Further, the piston column 503 is inserted into the limit sleeve 501 and elastically connected thereto through a first compression spring 502. A limit sliding groove 4013 cooperating with the limit sleeve 501 is provided on the side surface of the deflector 401. The front end of the limit sleeve 501 is a spherical top structure.

[0053] By sliding the limiting sleeve 501 within the limiting sliding groove 4013, the flow guiding plate 401 is caused to complete the unfolding and resetting actions. When the wind turbine rotates at a high speed, the flow guiding plate 401 squeezes the limiting sleeve 501 under the action of centrifugal force, causing the limiting sleeve 501 to squeeze the first compression spring 502 and contract inward, thereby enabling it to slide along the limiting sliding groove 4013.

[0054] Further, the limiting sliding groove 4013 includes a first positioning portion 40131, a second positioning portion 40132, and a guiding portion 40133. The first positioning portion 40131 and the second positioning portion 40132 are semi-circular notches, and the radius of the first positioning portion 40131 is smaller than the radius of the limiting sleeve 501, while the radius of the second positioning portion 40132 is equal to the radius of the limiting sleeve 501. The first positioning portion 40131 and the second positioning portion 40132 are respectively located at both ends of the upper end of the guiding portion 40133, and a protruding portion 40134 is formed between the first positioning portion 40131 and the guiding portion 40133.

[0055] When the limiting sleeve 501 is stuck in the first positioning portion 40131, the flow guiding plate 401 is in its initial state, and the sealing cover 4012 is flush with the outer end face of the front fairing 2. As the centrifugal force increases, when the centrifugal force received by the flow guiding plate 401 is greater than the elastic force given by the tension spring 402 and the resistance given by the protruding portion 40134, that is, when the rotational speed of the wind turbine exceeds the threshold value, the limiting sleeve 501 squeezes the first compression spring 502 and contracts inward, thereby quickly sliding along the guiding portion 40133 towards the second positioning portion 40132, causing the flow guiding plate 401 to suddenly jump and unfold, so as to increase the wind resistance of the wind turbine and at the same time guide the air flow into the rear fairing 3 to dissipate heat from the generator 102. The design of the smaller first positioning portion 40131 prevents the limiting sleeve 501 from passing through the first positioning portion 40131 and causing the flow guiding plate 401 to fail to bounce open, while the design of the larger second positioning portion 40132 enables the limiting sleeve 501 to pass through the second positioning portion 40132, allowing it to remain stable during rotation.

[0056] Further, a second compression spring 4033 is provided on the first rotating shaft 4031, and a limiting cap 4032 is provided at the top of the rotating shaft. The flow guiding plate 401 is elastically slidably connected to the fixing bracket 403 through the second compression spring 4033, and a limiting flange 4017 is provided at the edge of the second positioning portion 40132.

[0057] After the deflector 401 is deployed, the limit sleeve 501 is centered with the second positioning portion 40132 under the action of the limit flange 4017. During the high-speed rotation of the front fairing 2, the air flow blows vertically against the side surface of the deflector 401, causing the deflector 401 to squeeze the second compression spring 4033 under the action of the air flow, so that the limit sleeve 501 is inserted into the second positioning portion 40132. The deflector 401 is completely fixed under the action of the first rotating shaft 4031 and the limit sleeve 501. Even when the centrifugal force is slightly insufficient, the deflector 401 can still remain deployed. When the wind force is small enough, the deflector 401 rebounds and slides along the first rotating shaft 4031 under the reset action of the second compression spring 4033, so that the limit sleeve 501 can slide out of the second positioning portion 40132, and the deflector 401 can rotate again. At this time, the deflector 401 is reset under the action of the tension spring 402 to prevent the deflector 401 from unfolding or contracting repeatedly.

[0058] Further, the lead screw 602 is inserted into the central shaft sleeve 601 and rotatably connected thereto. The slider 603 is inserted into the central shaft sleeve 601 and slidably connected thereto. The lead screw 602 passes through the slider 603 and is threadedly connected thereto. The central shaft sleeve 601 is provided with a second chute 6011 that cooperates with the first ear plate 6031.

[0059] By rotating the lead screw 602, the position of the slider 603 is adjusted, thereby adjusting the initial length of the tension spring 402, changing the pulling force of the tension spring 402 on the deflector 401, and changing the ejection threshold of the deflector 401, so as to be able to adapt to different models of the power generation motor 102.

[0060] Further, a rocker 604 is rotatably connected to the central shaft sleeve 601. The upper end surface of the rocker 604 is slidably connected to the lower end surface of the deflector 401. A counterweight ball 6041 is provided at the end of the rocker 604.

[0061] When the central shaft sleeve 601 rotates at a high speed, the rocker 604 unfolds outward under the action of centrifugal force, thereby prying the bottom of the deflector 401 through a lever action, preventing the deflector 401 from being insufficiently unfolded only by its own centrifugal force. The counterweight ball 6041 increases the centrifugal force of the crowbar.

[0062] Further, a card slot 4014 that cooperates with the rocker 604 is provided at the bottom of the deflector 401, and a universal ball 4015 is provided in the card slot 4014.

[0063] The friction between the crowbar and the deflector 401 is reduced through the universal ball 4015, thereby reducing the wear rate of the crowbar and extending the service life of the crowbar.

[0064] Embodiment 2

[0065] Please refer to Figures 1-12, a wind turbine diversion method, comprising the following steps:

[0066] Step 1: When the device is started, the deflector 401 is usually in a retracted state, and is kept in a closed state by means of the tension spring 402 and the limit assembly 5, thereby reducing the wind resistance of the front deflector 2, so that the wind turbine can rotate quickly under light wind conditions;

[0067] Step 2: When the blade 101 drives the front air guide 2 to rotate at a high speed, the centrifugal force acts on the air guide plate 401 and the seesaw 604. The seesaw 604 pries the air guide plate 401 to overcome the tension of the tension spring 402 and the resistance of the first compression spring 502 in the limit assembly 5. The limit sleeve 501 compresses the first compression spring 502 to shrink, so that the air guide plate 401 is affected by the centrifugal force and quickly expands to guide the air.

[0068] Step 3, after the guide plate 401 is fully unfolded, the wind can directly act on the guide plate 401, guide more airflow into the front guide cover 2 through the guide groove 4011, and enter the rear guide cover 3 through the filter 202 to dissipate heat for the generator motor 102. The guide plate 401 is affected by the wind and slides along the first rotating shaft 4031, squeezing the second spring so that the limiting sleeve 501 is inserted into the second positioning portion 40132, thereby fixing the guide plate 401 through the first rotating shaft 4031 and the limiting sleeve 501;

[0069] Step 4: Due to the deployment of the deflector 401, the wind resistance area is increased, resulting in an increase in the rotation resistance of the front deflector 2, thereby reducing the rotation speed of the front deflector 2, controlling the speed of the generator motor 102, and preventing overload;

[0070] Step 5: When the wind weakens and the force of the wind is less than the elastic force of the second compression spring 4033, the limiting sleeve 501 slides out from the second limiting portion, so that the guide plate 401 can automatically rotate under the action of the tension spring 402, reducing the wind resistance of the front fairing 2 and improving the power generation efficiency.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind turbine guide device, comprising a wind turbine body (1), a front guide cover (2) and a rear guide cover (3), characterized in that: The front air guide cover (2) is provided with an air guide component (4), a limit component (5) and an adjustment component (6); The wind turbine main body (1) comprises a tower (103), a generator motor (102) and blades (101); the generator motor (102) is mounted in a rear air guide cover (3); the blades (101) are mounted on a front air guide cover (2); the rear air guide cover (3) is mounted on the upper end of the tower (103) and is movably connected thereto; a filter screen (202) is provided on the rear end surface of the front air guide cover (2) and the front end surface of the rear air guide cover (3); The air guide assembly (4) comprises an air guide plate (401), a tension spring (402) and a fixing frame (403); an air inlet (201) is provided on the side of the front air guide cover (2), and the air guide assembly (4) is installed in the air inlet (201); The limiting assembly (5) comprises a limiting sleeve (501), a first compression spring (502) and a piston rod (503); the limiting assembly (5) is mounted on a fixing frame (403); The adjustment component (6) comprises a central shaft sleeve (601), a screw rod (602) and a slider (603), and the adjustment component (6) is fixedly mounted at the center of the front air guide cover (2).

2. A flow guide device for a wind turbine according to claim 1, characterized in that: The fixing frame (403) is fixedly mounted on the inner end surface of the front air guide cover (2); the fixing frame (403) is provided with a first rotating shaft (4031); the air guide plate (401) is provided with a first axial hole (4018) matched with the first rotating shaft; the sliding block (603) is provided with a first ear plate (6031); the air guide plate (401) is provided with a second ear plate (4016); and the front and rear ends of the tension spring (402) are respectively fixedly connected to the first ear plate (6031) and the second ear plate (4016).

3. A flow guide device for a wind turbine according to claim 1, characterized in that: A sealing cover (4012) that cooperates with the air inlet (201) is arranged on the top of the guide plate (401), and a guide groove (4011) is arranged on the side of the guide plate (401), wherein the guide groove (4011) is a plurality of evenly arranged arc-shaped notches.

4. A flow guide device for a wind turbine according to claim 2, characterized in that: The piston column (503) is inserted into the limiting sleeve (501) and elastically connected thereto via a first compression spring (502); a limiting sliding groove (4013) cooperating with the limiting sleeve (501) is provided on the side of the guide plate (401); and the front end of the limiting sleeve (501) is a ball-top structure.

5. A flow guide device for a wind turbine according to claim 4, characterized in that: The limiting sliding groove (4013) comprises a first positioning portion (40131), a second positioning portion (40132) and a guiding portion (40133); the first positioning portion (40131) and the second positioning portion (40132) are semicircular notches; the radius of the first positioning portion (40131) is smaller than the radius of the limiting sleeve (501); the radius of the second positioning portion (40132) is equal to the radius of the limiting sleeve (501); the first positioning portion (40131) and the second positioning portion (40132) are respectively located at two ends of the upper end of the guiding portion (40133); and a protrusion (40134) is formed between the first positioning portion (40131) and the guiding portion (40133).

6. A flow guide device for a wind turbine according to claim 5, characterized in that: A second compression spring (4033) is provided on the first rotating shaft (4031), a limiting cap (4032) is provided on the top of the rotating shaft, the guide plate (401) is elastically slidably connected to the fixing frame (403) via the second compression spring (4033), and a limiting flange (4017) is provided on the edge of the second positioning portion (40132).

7. A flow guide device for a wind turbine according to claim 2, characterized in that: The screw rod (602) is inserted into the central shaft sleeve (601) and is rotatably connected thereto. The sliding block (603) is inserted into the central shaft sleeve (601) and is slidably connected thereto. The screw rod (602) passes through the sliding block (603) and is threadedly connected thereto. The central shaft sleeve (601) is provided with a second sliding groove (6011) that cooperates with the first ear plate (6031).

8. A flow guide device for a wind turbine according to claim 1, characterized in that: A rotatably connected seesaw (604) is provided on the central shaft sleeve (601), the upper end surface of the seesaw (604) is slidably connected to the lower end surface of the guide plate (401), and a weighted ball (6041) is provided at the end of the seesaw (604).

9. A flow guide device for a wind turbine according to claim 8, characterized in that: The bottom of the guide plate (401) is provided with a slot (4014) that cooperates with the seesaw (604), and a universal ball (4015) is provided in the slot (4014).

10. A flow guiding method for a wind turbine generator, applicable to a flow guiding device for a wind turbine generator as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: When the blade (101) drives the front air guide cover (2) to rotate, the air guide plate (401) is affected by the centrifugal force and unfolds to guide the air; Step 2: The guide plate (401) guides the airflow from the air inlet (201) to the front guide cover (2), so that the airflow passes through the front guide cover (2) and enters the rear guide cover (3) to dissipate heat for the generator motor (102); Step 3: Due to the deployment of the deflector plate (401), the rotational resistance of the front deflector (2) increases, thereby reducing the rotational speed of the front deflector (2), controlling the speed of the generator motor (102) and preventing overload; Step 4: If the wind weakens, the guide plate (401) will automatically retract under the action of the tension spring (402), and when the wind strengthens, the guide plate (401) will unfold again, always maintaining the best power generation efficiency and safety.

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