Wind power generation device

Abstract

The utility model provides a wind power generation device which comprises an impeller and a generator, a main shaft is arranged at the position of the axis of the impeller, and the main shaft is connected with the input end of the generator. The two air blocking assemblies are arranged on the main shaft in a penetrating mode and located at the two ends of the impeller correspondingly, an air inlet area of the impeller is formed between the two air blocking assemblies, each air blocking assembly comprises an air blocking plate, a door plate and a motor, an air outlet is formed in the air blocking plate, and an air outlet is formed in the door plate. The door plate is rotationally connected to the wind shield through a motor, and the door plate covers the air outlet. And the air speed detector is arranged on the air baffle, the air speed detector is electrically connected with the motor, and when the air speed detector recognizes that the environment air speed is larger than the preset air speed, the door plate opens the air outlet.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a wind power generation device. Background Technology

[0002] Currently, horizontal axis wind turbines use pitch control and strong wind brakes to stop the blades and protect the equipment during strong winds. Vertical axis wind turbines also use strong wind brakes for protection, which results in them stopping power generation during strong winds. Vertical axis wind power generation systems are popular with residential and distributed electricity customers, but the inability to generate electricity during strong winds degrades the user experience for residential users. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect of the existing technology where the generator stops generating electricity in strong winds, resulting in a poor user experience, and to provide a wind power generation device.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A wind power generation device, the wind power generation device comprising:

[0006] An impeller and a generator, wherein a main shaft is provided at the axis of the impeller and the main shaft is connected to the input end of the generator;

[0007] The wind deflector assembly includes two wind deflector assemblies, which are inserted through the main shaft and located at both ends of the impeller. The two wind deflector assemblies form the air inlet area of ​​the impeller. Each wind deflector assembly includes a wind deflector plate, a door plate, and a motor. An air outlet is provided on the wind deflector plate. The door plate is rotatably connected to the wind deflector plate by the motor and covers the air outlet.

[0008] A wind speed detector is installed on the wind deflector and is electrically connected to the motor. When the wind speed detector detects that the ambient wind speed is greater than a preset wind speed, the door panel opens the air outlet.

[0009] In this solution, windbreak components shield both ends of the impeller, while an anemometer detects wind speed. In strong winds, the air outlet opens to expel excess air, thus slowing the impeller and protecting the generator for stable operation and power generation. Compared to a strong wind brake that stops the impeller and interrupts power generation, this solution maintains power generation even in strong winds, improving the user experience, especially for households with continuous power needs. Furthermore, it protects the generator from overspeeding in strong winds, preventing damage to the generator or impeller and extending its lifespan.

[0010] Preferably, a guide vane is provided on the side edge of the impeller corresponding to the air inlet area, the guide vane is detachably connected to the impeller, and the guide vane extends from the first end of the impeller to the second end.

[0011] In this scheme, the above settings are used to increase the impeller's frontal area and improve air intake efficiency. Consequently, the torque of the main shaft is increased when the impeller rotates.

[0012] Preferably, the air guide plate forms a 45° angle with the impeller in the radial direction.

[0013] In this design, the above-mentioned settings are used to guide the airflow, allowing more air to enter the impeller.

[0014] Preferably, the number of air outlets and door panels is an even number of pairs.

[0015] In this solution, the above settings improve the uniformity of airflow compared to having an odd number of air outlets, thus reducing the impeller speed evenly under strong wind conditions.

[0016] Preferably, the main shaft is arranged vertically, and the wind power generation device further includes a base. The impeller, the windbreak assembly, and the generator are all arranged on the base. There are multiple impellers, which are arranged at intervals in the vertical direction and share the same main shaft and the same generator.

[0017] Or multiple impellers are arranged at intervals along the vertical direction, and each impeller is correspondingly provided with a generator.

[0018] In this solution, the power generation is increased by increasing the number of impellers through the above settings. Furthermore, the multiple impellers arranged vertically occupy less space, making them suitable for home users.

[0019] Preferably, the wind power generation device further includes a connector disposed on the side of the plurality of impellers and the base, and the horizontal plane in which the connector, the impeller or the base and the wind power generation device are located forms a triangular structure.

[0020] In this solution, the above settings are used to improve the stability of the wind power generation device and prevent damage to the equipment in strong winds.

[0021] Preferably, the wind power generation device further includes a gear speed increaser and a coupling, wherein the input end of the gear speed increaser is connected to the main shaft through the coupling, and the output end of the gear speed increaser is connected to the input end of the generator;

[0022] Alternatively, the wind power generation device may also include a belt drive assembly, which includes a first pulley and a second pulley. The first pulley is coaxially arranged with the main shaft, and the second pulley is coaxially arranged with the input end of the generator. A drive belt is fitted on the first pulley and the second pulley.

[0023] Alternatively, the wind power generation device may also include a coupling, through which the main shaft is connected to the input end of the generator.

[0024] In this solution, the connection between the spindle and the generator is achieved through the above settings.

[0025] Preferably, the windshield assembly further includes a drive gear, the output end of the motor is coaxially arranged with the drive gear, the drive gear is arranged at the axis of the windshield, and a rack is arranged on the door panel corresponding to the drive gear, the drive gear meshing with the rack.

[0026] In this solution, the above settings are used to enable the door panel to rotate relative to the wind deflector.

[0027] Preferably, the windshield assembly further includes a reversing switch, which is electrically connected to the motor to drive the door panel to rotate counterclockwise or clockwise.

[0028] In this solution, the above settings reduce the path required for the door panel to open or close the air outlet by changing the direction of rotation when the door panel rotates, thus reducing the response time compared to rotating in the same direction.

[0029] Preferably, the wind power generation device further includes a waterproof cover, which is installed over the motor and the reversing switch.

[0030] In this scheme, the above settings enable the wind power generation device to be used in different weather conditions to meet the need for continuous power generation.

[0031] The significant advantages of this invention are as follows: By using a windbreak assembly to shield both ends of the impeller and a wind speed detector to monitor wind speed, the invention opens the air outlet in strong winds to expel excess air, thus slowing the impeller down and protecting the generator so it can operate smoothly and generate electricity even in strong winds. Compared to methods that use a strong wind brake to stop the impeller and interrupt power generation, this invention maintains power generation even in strong winds, improving the user experience, especially for households with continuous power needs. Furthermore, it protects the generator from overspeeding in strong winds, preventing damage to the generator or impeller and extending its lifespan. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a wind power generation device according to a preferred embodiment of the present invention.

[0033] Figure 2 This is a top view of a windbreak assembly according to a preferred embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram of the connection between the gear speed increaser and the coupling in a preferred embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of the structure in a preferred embodiment of the present invention, showing the connection between the main shaft and the generator via a coupling.

[0036] Figure 5 This is a side view of a windshield assembly according to a preferred embodiment of the present invention.

[0037] Figure 6 This is a top view of a door panel according to a preferred embodiment of the present invention.

[0038] Figure 7 This is a diagram showing the positional relationship between the drive gear and the rack in a preferred embodiment of the present invention.

[0039] Figure 8 This is an exploded view of the structure of a wind power generation device according to a preferred embodiment of the present invention.

[0040] Figure 9 This is a schematic diagram of multiple impellers stacked according to a preferred embodiment of the present invention.

[0041] Figure 10 This is a schematic diagram of a preferred embodiment of the present invention, showing multiple impellers sharing the same main shaft.

[0042] Explanation of reference numerals in the attached figures:

[0043] Impeller 1

[0044] Spindle 11

[0045] 12 blades

[0046] Support component 13

[0047] Fixed cylinder 14

[0048] Air guide plate 15

[0049] Generator 2

[0050] Windshield Component 3

[0051] Windshield 31

[0052] Air outlet 311

[0053] Door panel 32

[0054] Motor 33

[0055] Drive gear 34

[0056] Rack 35

[0057] Reversing switch 36

[0058] Forward switch 361

[0059] Reverse switch 362

[0060] Waterproof cover 37

[0061] Wind speed detector 4

[0062] Processor 41

[0063] Speed ​​controller 42

[0064] Base 5

[0065] Connector 6

[0066] Gear speed increaser 7

[0067] Coupling 8

[0068] Belt drive assembly 9

[0069] First pulley 91

[0070] Second pulley 92

[0071] Drive belt 93 Detailed Implementation

[0072] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0073] This embodiment provides a wind power generation device, the specific structure of which is as follows: Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the wind power generation device includes:

[0074] Impeller 1 and generator 2, with a main shaft 11 installed at the axis of impeller 1, and the main shaft 11 connected to the input end of generator 2;

[0075] There are two wind baffle components 3. The two wind baffle components 3 are inserted through the main shaft 11 and are located at both ends of the impeller 1 respectively. The air inlet area of ​​the impeller 1 is formed between the two wind baffle components 3. The wind baffle component 3 includes a wind baffle plate 31, a door plate 32 and a motor 33. An air outlet 311 is opened on the wind baffle plate 31. The door plate 32 is rotatably connected to the wind baffle plate 31 through the motor 33 and covers the air outlet 311.

[0076] Wind speed detector 4 is installed on wind deflector 31 and is electrically connected to motor 33. When wind speed detector 4 detects that the ambient wind speed is greater than the preset wind speed, door panel 32 opens air outlet 311.

[0077] Specifically, the impeller 1 includes blades 12, a support member 13, and a fixed cylinder 14. The blades 12 are arc-shaped. The fixed cylinder 14 is sleeved on the main shaft 11. The support member 13 is located between the fixed cylinder 14 and the main shaft to support the fixed cylinder 14. The blades 12 are arranged in a ring around the fixed cylinder 14, and multiple blades 12 are provided to increase the structural strength of the impeller 1 by adding the fixed cylinder 14 and the support member 13, making it suitable for strong wind environments. The generator 2 is a medium-speed generator in the prior art, which will not be described in detail here.

[0078] Furthermore, the windbreak assembly 3 includes a windbreak plate 31, a door panel 32, and a motor 33. Both the windbreak plate 31 and the door panel 32 are circular plates, with the diameter of the windbreak plate 31 being larger than that of the door panel 32. The windbreak assembly 3 shields both ends of the impeller 1 to prevent damage from wind from different directions during strong winds. The windbreak plate 31 has a fan-shaped air outlet 311, and the door panel 32 has a through hole corresponding to the air outlet 311. A filter screen is installed inside the through hole to prevent external debris from entering the impeller 1 through the air outlet 311.

[0079] It is understandable that the area on the door panel 32 that is offset from the air outlet 311 is a material used to seal the air outlet 311. When the door panel 32 rotates relative to the baffle plate 31 via the motor 33, the air outlet 311 is sealed by the area offset from it, allowing the air to remain inside the impeller 1, which is suitable for situations with slower wind speeds. However, when the wind speed is higher, i.e., in strong wind conditions, the air volume entering the impeller 1 is large, and the impeller 1 rotates at a high speed, which can easily damage the impeller 1 and the generator 2 connected to it. Therefore, when the wind speed detector 4 detects that the ambient wind speed is greater than the preset wind speed (this embodiment takes a wind speed greater than 15 m / s as an example), the wind speed detector 4 transmits a signal to the motor 33. The motor 33 drives the door panel 32 to rotate, and the filter screen covers the air outlet 311 to release excess air volume, thereby reducing the speed of the impeller 1 to a safe operating range. This protects the generator 2 so that it can operate smoothly and generate electricity in strong wind conditions. Compared to using a strong wind braking structure to stop the impeller 1 from rotating and interrupt power generation, this method allows for continued power generation even in strong winds, improving the user experience, especially for households with continuous power needs. Additionally, it protects the generator 2 from wind-induced runaway and prevents damage to the generator 2 or impeller 1, extending their lifespan. When the wind speed is less than or equal to 15 m / s, the door panel 32 closes the air outlet 311, causing the air to remain at the impeller 1, thus improving power generation efficiency.

[0080] It should be noted that in this embodiment, the wind speed detector 4 can be a wind speed sensor in the prior art. A processor 41 and a speed controller 42 are also provided between the wind speed detector 4 and the generator 2. The speed controller 42 is connected to the input terminal of the generator 2 to directly adjust the speed of the generator 2 according to the actual wind speed to protect the generator 2. The motor 33 can be a drive motor in the prior art, and the speed controller 42 can be an electronic brake in the prior art. The signal output of the processor 41, the speed controller 42, and the wind speed detector 4 and their electrical connection with the motor 33 are all prior art. This embodiment does not improve their circuits and operating logic, and will not be described in detail here.

[0081] In this embodiment, a full circle of air guide plate 15 is provided on the side edge of the impeller 1 corresponding to the air inlet area. The air guide plate 15 is detachably connected to the impeller 1 and extends from the first end of the impeller 1 to the second end.

[0082] Specifically, the air guide plate 15 is located at the edge of the blade 12 away from the main shaft 11. The length direction of the air guide plate 15 is consistent with the extension direction of the main shaft 11. The two ends of the air guide plate 15 are provided with protrusions. The blade 12 is provided with slots corresponding to the two ends of the air guide plate 15 to realize the detachable connection between the air guide plate 15 and the blade 12. By setting the air guide plate 15 and extending the air guide plate 15 from the first end to the second end of the impeller 1, the windward area of ​​the impeller 1 is increased, and the air intake efficiency is increased. Correspondingly, the torque of the main shaft 11 is increased when the impeller 1 rotates.

[0083] Furthermore, in this embodiment, the air guide plate 15 forms a 45° angle with the impeller 1 in the radial direction.

[0084] Specifically, blade 12 is an arc-shaped blade, while the air guide plate 15 is a flat plate. The support member 13 extends along the radial direction of the impeller 1. The extension direction of the air guide plate 15 and the support member 13 forms a 45° angle. Compared with blade 12 without air guide plate 15, its windward area is effectively increased by about 30%. In addition, the 45° angle between the extension direction of the air guide plate 15 and the support member 13 can prevent the reverse wind on the arc-shaped blade from forming a reaction wind force. The air guide plate 15 guides the wind to the arc-shaped blade. The arc design of the arc-shaped blade can also improve the wind reception efficiency. The torque of the main shaft can be increased by about 20%.

[0085] In this embodiment, the number of air outlets 311 and door panels 32 is an even number of pairs.

[0086] Specifically, taking four air outlets 311 as an example, the four fan-shaped air outlets 311 are spaced apart, and adjacent air outlets 311 are separated by fan-shaped plates. The four air outlets 311 are two pairs. Similarly, there are four door panels 32. The area of ​​the door panel 32 corresponding to the air outlets 311 is a fan-shaped plate to effectively seal the air outlets 311. Compared with an odd number of air outlets 311, an even number of pairs of air outlets 311 can include the air volume and improve the uniformity of the air flow, so as to evenly reduce the speed of impeller 1 under strong wind conditions.

[0087] like Figure 10 As shown, in this embodiment, the main shaft 11 is arranged in a vertical direction. The wind power generation device also includes a base 5. The impeller 1, the windbreak assembly 3 and the generator 2 are all arranged on the base 5. There are multiple impellers 1, which are arranged at intervals in a vertical direction and share the same main shaft 11 and the same generator 2.

[0088] Specifically, the main shaft 11 is set vertically, and the impeller 1 is mounted on the main shaft 11. Compared with wind power generation devices where the main shaft 11 is set horizontally, it occupies less space when multiple impellers 1 are set. Especially for home users with limited available space, multiple impellers 1 can be stacked vertically to increase the power generation by increasing the number of impellers 1, making it more suitable for home users.

[0089] In this embodiment, the base 5 is positioned close to the ground, the impeller 1 and the windbreak assembly 3 are positioned above the base 5, and the generator 2 can be positioned inside the base 5 to reduce vertical space occupation. The main shaft 11 extends from the impeller 1 into the base 5 and connects to the generator 2. To ensure the power needs of household users, multiple impellers 1 can be provided. Multiple impellers 1 are spaced apart vertically and share the same main shaft 11. The main shaft 11 between adjacent impellers 1 is connected by a universal coupling. The main shaft 11 passing between multiple impellers 1 extends into the base 5 and connects to the same generator 2. This arrangement can reduce the number of generators 2 and lower the cost of the wind power generation device.

[0090] It is understood that the wind baffle assembly 3 can be set at both ends of each impeller 1. Of course, in other embodiments, the wind baffle assembly 3 can be set at the end of the impeller 1 away from the generator 2 and the end of the impeller 1 close to the generator 2. That is, only two wind baffle assemblies 3 are set. Their purpose is also to protect the impeller 1 and the generator 2 in strong wind conditions. The number of wind baffle assemblies 3 can be set as needed, which will not be elaborated on here.

[0091] like Figure 9 As shown, in another embodiment, a plurality of impellers 1 are arranged at intervals along the vertical direction and each impeller 1 is correspondingly provided with a generator 2.

[0092] Specifically, multiple impellers 1 are arranged at intervals along the vertical direction, and each impeller 1 is equipped with a single main shaft 11, meaning there are multiple main shafts 11. Similarly, each main shaft 11 is connected to a generator 2, meaning there are multiple generators 2. Correspondingly, each impeller 1 has two wind-blocking components 3 at both ends, which can also increase the power generation by increasing the number of impellers 1. It can be understood that when multiple impellers 1 and multiple generators 2 are arranged vertically, they share the same base 5 for support.

[0093] In this embodiment, the wind power generation device also includes a connector 6, which is disposed on the side of multiple impellers 1 and base 5. The connector 6, impellers 1 or base 5 and the horizontal plane where the wind power generation device is located form a triangular structure.

[0094] Specifically, the connector 6 is a cable in the prior art. One end of the cable is connected to the ground where the base 5 is located, and the other end of the cable is connected to the side of the impeller 1 and the side of the base 5 respectively to form a triangular structure. The cable is used to tighten the side of the impeller 1 and the side of the base 5 to improve the stability of the wind power generation device in strong wind conditions and avoid the equipment from overturning and being damaged in strong wind conditions.

[0095] In other embodiments, the connector 6 can also be a reinforcing rib. The reinforcing rib itself has a triangular structure. One side of the reinforcing rib at the right angle is fixedly connected to the ground, and the other side is connected to the impeller 1 and the base 5. It can also achieve the purpose of improving the stability of the wind power generation device. The reinforcing rib is a structure in the prior art, and will not be described in detail here.

[0096] like Figure 3 As shown, in this embodiment, the wind power generation device also includes a gear speed increaser 7 and a coupling 8. The input end of the gear speed increaser 7 is connected to the main shaft 11 through the coupling 8, and the output end of the gear speed increaser 7 is connected to the input end of the generator 2.

[0097] Specifically, the input end of the gear speed increaser 7 is connected to the main shaft 11 via the coupling 8, and the output end of the gear speed increaser 7 is connected to the input end of the generator 2. The gear speed increaser 7 is a structure in the prior art, and will not be described in detail here. By setting the gear speed increaser 7, the rotational speed of the input end of the generator 2 is increased, thereby increasing the power generation.

[0098] like Figure 1 As shown, in another embodiment, the wind power generation device further includes a belt drive assembly 9, which includes a first pulley 91 and a second pulley 92. The first pulley 91 is coaxially arranged with the main shaft 11, and the second pulley 92 is coaxially arranged with the input end of the generator 2. A drive belt 93 is sleeved on the first pulley 91 and the second pulley 92.

[0099] Specifically, the diameter of the first pulley 91 is larger than the diameter of the second pulley 92. The first pulley 91 is positioned on the main shaft 11 by a limiting block. The second pulley 92 is fixedly connected to the input end of the generator 2. The transmission belt 93 can be a smooth belt or a belt with a non-smooth structure on the surface that contacts the first pulley 91 and the second pulley 92, such as a rack and pinion belt or a belt with a rough surface. This is an existing design and will not be described in detail here.

[0100] like Figure 4 As shown, in other embodiments, the main shaft 11 can also be directly connected to the input end of the generator 2 via a coupling 8, in order to save on the manufacturing cost of the wind power generation device.

[0101] In this embodiment, the windshield assembly 3 further includes a drive gear 34. The output end of the motor 33 is coaxially arranged with the drive gear 34. The drive gear 34 is located at the axis of the windshield 31. A rack 35 is provided on the door panel 32 corresponding to the drive gear 34. The drive gear 34 meshes with the rack 35.

[0102] Specifically, a reducer is also provided between the drive gear 34 and the motor 33. The reducer includes a high-speed shaft and a low-speed shaft. The high-speed shaft is connected to the motor 33, and the low-speed shaft is connected to the drive gear 34. The rack 35 is an arc-shaped rack. The extension length of the rack 35 is greater than the sum of the central angles corresponding to the two air outlets 311. By rotating the drive gear 34, the rack 35 meshing with it is driven to rotate around the main shaft 11, thereby realizing the rotation of the door panel 32 relative to the wind deflector 31.

[0103] In this embodiment, the windshield assembly 3 also includes a reversing switch 36, which is electrically connected to the motor 33 so as to drive the door panel 32 to rotate counterclockwise or clockwise.

[0104] like Figure 7 As shown, specifically, the reversing switch 36 includes a forward switch 361 and a reverse switch 362. The forward switch 361 and reverse switch 362 are electrically connected to the wind speed detector 4 via a control board. Based on the ambient wind speed detected by the wind speed detector 4, the forward switch 361 or the reverse switch 362 is activated accordingly, causing the motor 33 to rotate forward or reverse. Simultaneously, the rack 35 and drive gear 34 are used to reduce the path required for the door panel 32 to open or close the air outlet 311 when it rotates by changing the direction of rotation, thus reducing the response time compared to rotating in the same direction. It should be noted that the forward switch 361, reverse switch 362, and control board are all existing structures in the prior art; this embodiment does not improve their working principle and will not be elaborated upon further here.

[0105] In this embodiment, the wind power generation device also includes a waterproof cover 37, which covers the motor 33 and the reversing switch 36.

[0106] Specifically, the waterproof cover 37 has a cylindrical structure with an internal cavity that extends through the bottom of the waterproof cover 37. The waterproof cover 37 is placed on the door panel 32 and fixedly connected to the door panel 32 so that the wind power generation device can be used in different weather conditions, such as rainy days, to meet the need for continuous power generation.

[0107] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A wind power plant, characterized in that The wind power generation device comprises: A impeller and a generator, the axis of the impeller is provided with a main shaft, the main shaft is connected with the input end of the generator; Two wind blocking assemblies are provided, the two wind blocking assemblies are arranged on the main shaft and are respectively located at the two ends of the impeller, the wind blocking assemblies form an air inlet area of the impeller between the two wind blocking assemblies, the wind blocking assembly comprises a wind blocking plate, a door plate and a motor, the wind blocking plate is provided with an air outlet, the door plate is rotatably connected to the wind blocking plate by the motor, and the door plate covers the air outlet; A wind speed detector is arranged on the wind blocking plate, the wind speed detector is electrically connected with the motor, and when the wind speed detector identifies that the environmental wind speed is greater than the preset wind speed, the door plate opens the air outlet.

2. The wind power plant according to claim 1, characterized in that The side edge of the impeller is provided with a guide vane corresponding to the air inlet area, the guide vane is detachably connected with the impeller, and the guide vane extends from the first end to the second end of the impeller.

3. The wind power plant according to claim 2, wherein The guide vane and the radial direction of the impeller form a 45° angle.

4. The wind power plant according to claim 1, wherein The number of the air outlet and the door plate is even.

5. The wind power plant according to claim 1, wherein The main shaft is arranged in a vertical direction, the wind power generation device further comprises a base, the impeller, the wind blocking assembly and the generator are arranged on the base, wherein the impeller is provided with a plurality of impellers, the plurality of impellers are arranged in a vertical direction and share the same main shaft and the same generator; Or a plurality of impellers are arranged in a vertical direction, and each impeller is correspondingly provided with one generator.

6. The wind power plant according to claim 5, characterized in that The wind power generation device further comprises a connecting piece, the connecting piece is arranged on the side of the plurality of impellers and the base, the connecting piece, the impeller or the base and the horizontal plane of the wind power generation device form a triangular structure.

7. The wind power plant according to claim 1, wherein The wind power generation device further comprises a gear speed increaser and a shaft coupling, the input end of the gear speed increaser is connected with the main shaft through the shaft coupling, and the output end of the gear speed increaser is connected with the input end of the generator; Or the wind power generation device further comprises a belt transmission assembly, the belt transmission assembly comprises a first belt pulley and a second belt pulley, the first belt pulley is coaxially arranged with the main shaft, the second belt pulley is coaxially arranged with the input end of the generator, and a transmission belt is sleeved on the first belt pulley and the second belt pulley; Or the wind power generation device further comprises a shaft coupling, the main shaft is connected with the input end of the generator through the shaft coupling.

8. The wind power plant according to claim 1, wherein The wind blocking assembly further comprises a drive gear, the output end of the motor is coaxially arranged with the drive gear, the drive gear is arranged at the axis of the wind blocking plate, the door plate is provided with a rack corresponding to the drive gear, and the drive gear is engaged with the rack.

9. The wind power plant according to claim 8, characterized in that The wind blocking assembly further comprises a reversing switch, the reversing switch is electrically connected with the motor, so that the door plate is driven to rotate counterclockwise or clockwise through the reversing switch.

10. The wind power plant according to claim 9, characterized in that The wind power generation device further comprises a waterproof cover, the waterproof cover covers the motor and the reversing switch.

Images