Double-impeller wind power generator

Abstract

The application discloses a double-impeller wind power generator, and belongs to the technical field of wind power generation. The double-impeller wind power generator comprises a tower, a pivot, two impellers, a transmission mechanism, a generator, a transmission mechanism, a yaw mechanism and a control system. The pivot is rotationally connected with the tower through a bearing, and a machine cabin is arranged at the top of the pivot. The two impellers are arranged at opposite ends of the machine cabin respectively, the rotating direction of one impeller is opposite to that of the other impeller, and the two impellers are transmissionally connected with the transmission mechanism. The input end of the generator is connected with the output end of the transmission mechanism. The yaw mechanism is used for driving the pivot to rotate around the axial direction of the tower, so as to change the orientation of the impellers. The control system is electrically connected with the transmission mechanism, the impeller mechanism, the generator and the yaw mechanism respectively, and is used for managing and monitoring the operation of the equipment. The application can reduce the mechanical load of the machine cabin, improve the wind energy capturing efficiency by optimizing the stress distribution and enhancing the structural strength, and improve the power generation efficiency.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a dual-blade wind turbine. Background Technology

[0002] In the field of wind power generation, wind turbines are key equipment for converting wind energy into electrical energy, and their performance directly affects power generation efficiency and economic benefits. With the continuous increase in global demand for clean energy and the ongoing expansion of wind power generation, the performance requirements for wind turbines are becoming increasingly stringent.

[0003] Twin-rotor wind turbines typically incorporate a yaw mechanism, which drives the rotor to rotate around a vertical axis. This allows the rotor to track changes in wind direction, ensuring it always faces the wind and improving wind energy capture efficiency. In existing technologies, the yaw mechanism acts directly on the nacelle, concentrating all yaw force at the connection between the nacelle and the tower. This results in the nacelle bearing a significant mechanical load. When wind speed changes drastically or wind direction abruptly shifts, the resulting vibrations and impacts directly affect the nacelle, increasing the risk of fatigue damage and impacting the overall structural stability of the wind turbine, thus posing a significant safety hazard. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a dual-blade wind turbine generator, which can reduce the direct stress on the nacelle, thereby improving the stability and durability of the overall structure.

[0005] According to an embodiment of the present invention, a dual-rotor wind turbine includes: a tower; a pivot, which is disposed within the tower and coaxially arranged with the tower, and rotatably connected to the tower, with a nacelle at the top of the pivot and fixedly connected to the pivot; two impellers, which are respectively disposed at opposite ends of the nacelle, with the rotation direction of one impeller opposite to that of the other impeller; a transmission mechanism, which is disposed within the nacelle, and both impellers are tractively connected to the transmission mechanism; a generator, which is disposed within the nacelle, with its input end connected to the output end of the transmission mechanism; a rotating mechanism, which is fixedly connected to the tower mechanism and rotatably connected to the pivot, and is used to support the rotation of the pivot; a yaw mechanism, which is disposed between the tower and the pivot, and is used to drive the pivot to rotate around the axial direction of the tower to change the orientation of the impellers; and a control system, which is electrically connected to the impellers, the transmission mechanism, the generator, the rotating mechanism, and the yaw mechanism, and is used to manage the operation of the equipment.

[0006] The dual-rotor wind turbine according to an embodiment of the present invention has at least the following beneficial effects: A pivot is coaxially mounted inside the tower, its bottom rotatably connected to the tower via bearings, and a nacelle is fixed at the top. A transmission mechanism and a generator are housed within the nacelle. Two rotors are respectively located at both ends of the nacelle, rotating in opposite directions. Wind-driven rotor rotation transmits mechanical energy to the generator for power generation. The control system monitors wind speed, wind direction, and equipment operating status in real time. When the wind direction changes, the control system issues a command to drive the pivot to rotate around the tower axially, thereby adjusting the orientation of the nacelle and rotors to ensure the rotors always face the wind and to ensure stable system operation. Therefore, the yaw mechanism acts on the pivot rather than the nacelle. The yaw force is transmitted to the tower through the pivot, reducing the mechanical load on the nacelle. The pivot is connected to the tower through bearings, providing more stable rotational support and reducing the impact of vibration and shock on the nacelle. This reduces the impact of sudden wind changes on the nacelle and lowers safety hazards. On the other hand, by optimizing the stress distribution and enhancing the structural strength, the feasibility of yaw operation is ensured while improving wind energy capture efficiency, thereby improving power generation efficiency. This not only extends the service life of the equipment but also provides a reliable guarantee for the long-term stable operation of the wind turbine.

[0007] According to some embodiments of the present invention, the yaw mechanism includes a yaw drive assembly disposed on a tower and connected to a pivot, the yaw drive assembly being used to provide power for the yaw motion of the pivot.

[0008] According to some embodiments of the present invention, the yaw drive assembly includes: a yaw gear ring disposed on a pivot and coaxially arranged with the pivot; and a yaw gear motor disposed on a tower and meshing with a yaw gear to cooperate with the yaw gear ring to drive the pivot to rotate.

[0009] According to some embodiments of the present invention, the yaw mechanism further includes a yaw auxiliary component, which is disposed on the tower and connected to the pivot. The yaw auxiliary component is used to assist the yaw drive component so that the pivot rotates smoothly.

[0010] According to some embodiments of the present invention, the yaw assist assembly includes a plurality of auxiliary gears, all of which are mounted on the tower. Each auxiliary gear meshes with a yaw gear ring, and the yaw gear motor and the plurality of auxiliary gears are evenly distributed around the periphery of the pivot in a circumferential direction.

[0011] According to some embodiments of the present invention, the yaw gear motor is provided with a brake, which is configured to lock the yaw gear motor when the yaw action stops, so as to prevent unintended rotation of the pivot.

[0012] According to some embodiments of the present invention, the yaw drive assembly further includes a plurality of meteorological sensors, which are disposed on at least one of the tower, nacelle and impeller. The meteorological sensors are electrically connected to the control system. The meteorological sensors monitor meteorological data in real time and feed it back to the control system. The control system sends a command to drive the yaw gear motor so that the yaw gear ring drives the pivot to rotate and adjust the impeller yaw to align with the wind direction.

[0013] According to some embodiments of the present invention, the rotating mechanism includes: a first bearing disposed at the bottom of the pivot, the pivot being rotatably connected to the tower via the first bearing, the first bearing being configured to support the weight of the pivot and the nacelle and to allow the pivot to rotate within the tower; and a second bearing disposed at the top of the pivot, the second bearing being fixed to the inner wall of the tower, the second bearing being configured to support radial loads on the second bearing.

[0014] According to some embodiments of the present invention, the yaw mechanism further includes a plurality of yaw limiting components, which are circumferentially disposed on the tower and connected to the pivot. The plurality of yaw limiting components are distributed around the periphery of the first bearing. The yaw limiting components are configured to adjust the vertical state of the pivot radially so that the axis of the pivot remains vertical.

[0015] According to some embodiments of the present invention, the transmission mechanism includes: two first bevel gears, each impeller corresponding to one first bevel gear, each first bevel gear being connected to the corresponding impeller via a drive shaft; a second bevel gear, the tops of the two first bevel gears meshing with the second bevel gear, the top of the second bevel gear being fixedly connected to a drive shaft; a third bevel gear, the third bevel gear being coaxially arranged with the second bevel gear, the third bevel gear being located at the end of the drive shaft away from the second bevel gear; and a planetary gear set, the input end of the planetary gear set having a fourth bevel gear, the bottom of the fourth bevel gear meshing with the third bevel gear, and the output end of the planetary gear set being connected to a generator.

[0016] According to some embodiments of the present invention, a planetary gear set includes a first planetary gear and a second planetary gear. The first planetary gear and the second planetary gear are coaxially arranged. The input end of the first planetary gear is drivenly connected to the output end of a fourth bevel gear. The input end of the second planetary gear is drivenly connected to the output end of the first planetary gear. The second planetary gear is located at the end of the first planetary gear away from the fourth bevel gear. The output end of the second planetary gear is drivenly connected to a high-speed shaft. The other end of the high-speed shaft passes through the fourth bevel gear and is connected to the power shaft of a generator through a coupling.

[0017] According to some embodiments of the present invention, a maintenance ladder is provided inside the pivot, which is used to enable passage between the cabin, the pivot and the tower, so as to facilitate the maintenance and management of the equipment.

[0018] According to some embodiments of the present invention, a braking mechanism is also included, wherein at least one of the two impellers, the transmission mechanism and the generator is connected to the braking mechanism, which is used to ensure the safe operation of the equipment.

[0019] According to some embodiments of the present invention, the nacelle is provided with a plurality of seals, each seal being located between the nacelle and the impeller, and the seals are configured to prevent dust in the air from entering the nacelle.

[0020] According to some embodiments of the present invention, the seal includes a sealing cavity, and a plurality of first panels and a plurality of second panels alternately arranged on the inner wall of the sealing cavity along the airflow direction.

[0021] According to some embodiments of the present invention, the impeller includes multiple blades, and the angle between the blades near the nacelle and the tower is α, wherein 2° < α < 6°.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a front view of a dual-blade wind turbine according to an embodiment of the present invention;

[0025] Figure 2 This is a side view of a dual-blade wind turbine according to an embodiment of the present invention;

[0026] Figure 3 for Figure 2 Structural diagram of the central axis and cabin;

[0027] Figure 4 for Figure 3 Cross-sectional view of AA;

[0028] Figure 5 for Figure 3 Cross-sectional view of BB;

[0029] Figure 6 for Figure 3 Cross-sectional view of the yaw drive assembly and yaw assist assembly;

[0030] Figure 7 for Figure 3 Cross-sectional view of CC;

[0031] Figure 8 for Figure 7 A structural diagram;

[0032] Figure 9 for Figure 3 Structural diagram of the middle cabin;

[0033] Figure 10 for Figure 9 Schematic diagram of the transmission mechanism;

[0034] Figure 11 for Figure 9 Enlarged view of point A in the middle;

[0035] Figure label:

[0036] Tower 100;

[0037] Pivot 200, cabin 210, seal 211, sealing cavity 2111, first panel 2112, second panel 2113, maintenance elevator 220;

[0038] Impeller 300, fan blade 310;

[0039] Transmission mechanism 400, first bevel gear 410, drive shaft 411, second bevel gear 420, transmission shaft 421, third bevel gear 430, planetary gear set 440, first planetary gear 441, second planetary gear 442, high-speed shaft 443, fourth bevel gear 450.

[0040] Generator 500, coupling 510, drive shaft 520;

[0041] Rotating mechanism 600, first bearing 610, second bearing 620;

[0042] Yaw mechanism 700, yaw drive assembly 710, yaw gear ring 711, yaw gear motor 712, yaw auxiliary assembly 720, auxiliary gear 721, yaw limit assembly 730, adjustment drive component 731, support base 732, adjustment block 733.

[0043] Braking mechanism 800. Detailed Implementation

[0044] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0045] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, and "above," "below," "within," etc. are understood to include the stated number. If "first," "second," etc. are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0046] In the description of this invention, unless otherwise explicitly defined, terms such as "set", "install", and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0047] Please refer to Figures 1 to 9 This embodiment discloses a dual-blade wind turbine, including a tower 100, a pivot 200, two impellers 300, a transmission mechanism 400, a generator 500, a rotating mechanism 600, a yaw mechanism 700, and a control system. The pivot 200 is located within the tower 100, coaxially aligned with it, and rotatably connected to the tower 100. A nacelle 220 is located on top of the pivot 200 and is fixedly connected to it. The two impellers 300 are located at opposite ends of the nacelle 220, with one impeller rotating in the opposite direction to the other. The transmission mechanism 400 is located within the nacelle 220, and both impellers 300 are connected to it. A generator 500 is located within the nacelle 220, and its input end is connected to the output end of the transmission mechanism 400. A rotating mechanism 600 is fixedly connected to the tower 100 and rotatably connected to the pivot 200, supporting the rotation of the pivot 200. A yaw mechanism 600 is located between the tower 100 and the pivot 200, driving the pivot 200 to rotate around the axial direction of the tower 100, thereby changing the orientation of the impeller 300. A control system is electrically connected to the impeller 300, transmission mechanism 400, generator 500, rotating mechanism, and yaw mechanism 600, and manages the equipment operation.

[0048] like Figures 1 to 4As shown, the pivot 200 is coaxially mounted inside the tower 100, and its bottom is rotatably connected to the tower 100 via a rotating mechanism 600. A nacelle 210 is fixed at the top, and a transmission mechanism 400 and a generator 500 are housed within the nacelle 210. Two impellers 300 are located at opposite ends of the nacelle 210, rotating in opposite directions. Wind-driven rotation of the impellers 300 transmits mechanical energy to the generator 500 for power generation via the transmission mechanism 400. The control system monitors wind speed, wind direction, and equipment operating status in real time. When the wind direction changes, the control system issues a command to cause the yaw mechanism 700 to drive the pivot 200 to rotate axially around the tower 100, thereby adjusting the orientation of the nacelle 210 and the impellers 300 to ensure that the impellers 300 always face the wind and to ensure stable system operation.

[0049] The yaw mechanism 700 acts on the pivot 200 instead of the nacelle 210. The yaw force is transmitted to the tower 100 through the pivot 200, reducing the mechanical load on the nacelle 210. The pivot 200 is connected to the tower 100 through the bearing 610, providing more stable rotational support and reducing the impact of vibration and shock on the nacelle 210. This reduces the impact of sudden wind changes on the nacelle 210 and reduces safety hazards. On the other hand, by optimizing the force distribution and enhancing the structural strength, the feasibility of yaw operation is ensured while improving wind energy capture efficiency, thereby improving power generation efficiency. This not only extends the service life of the equipment but also provides a reliable guarantee for the long-term stable operation of the wind turbine 500.

[0050] It should be noted that the coordinated operation of the dual impeller 300 design and control system further improves wind energy capture efficiency and power generation. At the same time, the counter-rotating design of the dual impeller 300 can further offset some of the torque, thus reducing the torsional stress on the nacelle 210 and the tower 100 and enhancing the stability of the overall structure.

[0051] In some specific embodiments of the present invention, the yaw mechanism 700 includes a yaw drive assembly 710, which is mounted on the tower 100 and connected to the pivot 200. The yaw drive assembly 710 provides power for the yaw motion of the pivot 200. Figure 2 and Figure 3 As shown, the yaw drive assembly 710 is mounted on the tower 100 and connected to the pivot 200 to provide power for the yaw motion of the pivot 200, driving the pivot 200 to rotate about the axis of the tower 100, thereby adjusting the orientation of the impeller 300.

[0052] In some specific embodiments of the present invention, the yaw drive assembly 710 includes: a yaw gear ring 711 and a yaw gear motor 712. The yaw gear ring 711 is disposed on the pivot 200 and is coaxially arranged with the pivot 200. The yaw gear motor 712 is disposed on the tower 100 and meshes with the yaw gear so as to cooperate with the yaw gear ring 711 to drive the pivot 200 to rotate.

[0053] like Figure 6 As shown, a yaw gear motor 712 meshes with a yaw gear ring 711, which is coaxially arranged with the pivot 200. The yaw gear motor 712 drives the yaw gear to rotate, thereby driving the pivot 200 to rotate around the axial direction of the tower 100, adjusting the orientation of the impeller 300 to align with the wind direction. It should be noted that the meshing transmission between the yaw gear motor 712 and the gear ring 711 enables precise angle control and allows for forward and reverse rotation, enabling the nacelle to flexibly adjust its position according to wind direction changes, ensuring accurate alignment with the wind direction and improving wind energy capture efficiency.

[0054] In some specific embodiments of the present invention, the yaw mechanism 700 further includes a yaw assist component 720, which is disposed on the tower 100 and connected to the pivot 200. The yaw assist component 720 is used to assist the yaw drive component 710 so that the pivot 200 rotates smoothly.

[0055] In some specific embodiments of the present invention, the yaw assist component 720 includes a plurality of auxiliary gears 721, all of which are disposed on the tower 100. Each auxiliary gear 721 meshes with the yaw gear ring 711. The yaw gear motor 712 and the plurality of auxiliary gears 721 are evenly distributed around the periphery of the pivot 200 in the circumferential direction.

[0056] like Figure 6 As shown, the yaw assist component 720 is mounted on the tower 100, and it is located on the same horizontal plane as the yaw drive component 710. Specifically, the yaw gear ring 711 is coaxially sleeved on the outside of the pivot 200, and the yaw gear ring 711 is located at the bottom of the pivot 200. In this specific embodiment, there are two auxiliary gears 721, both of which are mounted on the tower 100. The yaw gear motor 712 and the auxiliary gears 721 are evenly distributed around the pivot 200 in a circumferential direction, and the auxiliary gears 721 and the yaw gear motor 712 are both meshed with the top yaw gear ring 711. When the yaw gear motor 712 drives the yaw gear to rotate, the yaw gear motor 712 provides the drive, and the two auxiliary gears 721 and the yaw gear motor 712 together provide support to ensure the smoothness and accuracy of the yaw action.

[0057] In some specific embodiments of the present invention, the yaw drive assembly 710 further includes several meteorological sensors. The meteorological sensors are at least located on one of the tower 100, the nacelle 210 and the impeller 300. The meteorological sensors are electrically connected to the control system. The meteorological sensors monitor meteorological data in real time and feed it back to the control system. The control system sends a command to drive the yaw gear motor 712 so that the yaw gear ring 711 drives the pivot 200 to rotate, thereby adjusting the yaw of the impeller 300 to align with the wind direction.

[0058] In some specific embodiments of the present invention, the yaw gear motor 712 is equipped with a brake, which is configured to lock the yaw gear motor 712 when the yaw action stops, to prevent unintended rotation of the pivot 200. Specifically, the brake includes, but is not limited to, an electromagnetic brake and a mechanical brake. Specifically, when the weather sensor detects a change in wind direction, the control system drives the yaw gear motor 712 to rotate the yaw gear ring 711, causing the pivot 200 to rotate and adjust the orientation of the impeller 300. Once the impeller 300 is aligned with the wind direction, the brake is activated to brake the pivot 200, preventing it from continuing to rotate due to wind force or inertia, and ensuring that the impeller 300 remains stably aligned with the wind direction. It should be noted that the brake can also lock the pivot 200 in strong winds or emergencies to prevent excessive yaw or accidental rotation, thereby improving the safety and stability of the system.

[0059] In some specific embodiments of the present invention, the rotating mechanism 600 includes: a first bearing 610, which is disposed at the bottom of the pivot 200, and the pivot 200 is rotatably connected to the tower 100 via the first bearing 610. The first bearing 610 is configured to support the weight of the pivot 200 and the nacelle 210, and to allow the pivot 200 to rotate within the tower 100; and a second bearing 620, which is disposed at the top of the pivot 200, and is fixed to the inner wall of the tower 100. The second bearing 620 is configured to support the radial load of the second bearing 620.

[0060] Specifically, the first bearing 610 is, but is not limited to, a roller bearing, and the second bearing 620 is, but is not limited to, a slewing bearing.

[0061] In some specific embodiments of the present invention, the yaw mechanism 700 further includes a plurality of yaw limiting components 730, which are circumferentially disposed on the tower 100 and distributed around the periphery of the bearing 610. Each of the plurality of yaw limiting components 730 is connected to the pivot 200. The yaw limiting components 730 are configured to adjust the vertical state of the pivot 200 radially so that the axis of the pivot 200 remains vertical.

[0062] like Figure 7 and Figure 8As shown, the yaw limit assembly 730 includes an adjustment drive 731, a support base 732, and an adjustment block 733. The support base 732 is fixed on the tower 100, the adjustment drive 731 is mounted on the support base 732, and the adjustment block 733 is drivenly connected to the output end of the adjustment drive 731. The adjustment block 733 is configured to fit the shape of the outer wall of the pivot 200. The adjustment drive 731 controls the adjustment block 733 to move radially along the pivot 200 to fine-tune the vertical state of the pivot 200. Thus, when the axis of the pivot 200 deviates from the vertical state, the control system issues a command to drive the limit blocks in the multiple yaw limit assemblies 730 to move radially to adjust the position of the pivot 200, restoring its axis to the vertical state, ensuring the accuracy and stability of the adjustment.

[0063] In this specific embodiment, three yaw limit components 730 are provided, and the three yaw limit components 730 are evenly distributed around the periphery of the pivot 200 bearing 610.

[0064] In some specific embodiments of the present invention, the transmission mechanism 400 includes: two first bevel gears 410, each impeller 300 corresponding to one first bevel gear 410, each first bevel gear 410 being connected to the corresponding impeller 300 via a drive shaft 411; a second bevel gear 420, the tops of the two first bevel gears 410 meshing with the second bevel gear 420, the top of the second bevel gear 420 being fixedly connected to the drive shaft 421; a third bevel gear 430, the third bevel gear 430 being coaxially arranged with the second bevel gear 420, the third bevel gear 430 being located at the end of the drive shaft 421 away from the second bevel gear 420; a planetary gear set 440, the input end of the planetary gear set 440 being provided with a fourth bevel gear 450, the bottom of the fourth bevel gear 450 meshing with the third bevel gear 430, and the output end of the planetary gear set 440 being connected to the generator 500.

[0065] like Figure 9 and Figure 10As shown, two first bevel gears 410 are respectively disposed at the left and right ends of the second bevel gear 420, and the two first bevel gears 410 mesh together with the second bevel gear 420. A drive shaft 421 is coaxially disposed on the top of the second bevel gear 420, and a third bevel gear 430 is coaxially disposed on the top of the drive shaft 421. A load-bearing bearing 610 is sleeved on the drive shaft 421, and the load-bearing bearing 610 is located between the second bevel gear 420 and the third bevel gear 430. The fourth bevel gear 450 meshes with the third bevel gear 430 located at the bottom of the fourth bevel gear 450. The input end of the planetary gear set 440 is connected to the fourth bevel gear 450 for transmission. The output end of the planetary gear set 440 is connected to the generator 500 through the high-speed shaft 443. Specifically, the output end of the planetary gear set 440 is located to the left of the third bevel gear 430. The left end of the high-speed shaft 443 is fixed to the planetary gear, and its right end passes through the fourth bevel gear 450 and is connected to the power shaft 520 of the generator 500 through the coupling 510. Therefore, when the wind blows towards the impeller 300, the two impellers 300 start to rotate when they are coaxially arranged and rotate in opposite directions, converting wind energy into mechanical energy. The mechanical energy of the two wind turbine impellers 300 is transmitted to the corresponding first bevel gear 410 through the drive shaft 411, and then to the third bevel gear 430 through the second bevel gear 420 and the transmission shaft 421. The third bevel gear 430 transmits mechanical energy to the fourth bevel gear 450, which drives the planetary gear set 440 to rotate. The planetary gear set 440 realizes the speed-increasing function and transmits mechanical energy to the generator 500 via the high-speed shaft 443. The generator 500 converts the mechanical energy into electrical energy for output.

[0066] In some specific embodiments of the present invention, the planetary gear set 440 includes a first planetary gear 441 and a second planetary gear 442. The first planetary gear 441 and the second planetary gear 442 are coaxially arranged. The input end of the first planetary gear 441 is drivenly connected to the output end of the fourth bevel gear 450. The input end of the second planetary gear 442 is drivenly connected to the output end of the first planetary gear 441. The second planetary gear 442 is located at the end of the first planetary gear 441 away from the fourth bevel gear 450. The output end of the second planetary gear 442 is drivenly connected to the high-speed shaft 443. The other end of the high-speed shaft 443 passes through the fourth bevel gear 450 and is connected to the power shaft 520 of the generator 500 through a coupling 510.

[0067] Specifically, when the fourth bevel gear 450 rotates, it drives the planet carrier of the first planetary gear 441 to rotate, causing the planet gears of the first planetary gear 441 to rotate around and around a fixed internal gear ring as a reference. Simultaneously, this drives the sun gear of the first planetary gear 441 to accelerate. The sun gear of the first planetary gear 441 is connected to the planet carrier of the second planetary gear 442. Based on the same fixed internal gear ring, the planet gears of the second planetary gear 442 rotate around the sun gear, further accelerating its rotation. This accelerated rotation of the sun gear ultimately drives the generator 500 to rotate, thus generating electricity.

[0068] In some specific embodiments of the present invention, a maintenance ladder 220 is provided inside the pivot 200. The maintenance ladder 220 is used to facilitate passage between the cabin 210, the pivot 200, and the tower 100, so as to facilitate equipment maintenance and management. Specifically, as Figure 3 As shown, the maintenance ladder 220 installed inside the pivot 200 extends upward from the bottom of the pivot 200 to the interior of the nacelle 210. It provides maintenance personnel with a safe passage from the pivot 200 to the nacelle 210, ensuring the safety and convenience of maintenance personnel during the climbing process. It not only improves the safety and maintainability of the equipment, but also reduces maintenance costs. It is an indispensable part of the design of the wind turbine 500.

[0069] like Figure 9 and Figure 10 As shown, in this specific embodiment, the braking mechanism 800 is connected to the planetary gear in the transmission mechanism 400. Specifically, the braking mechanism 800 is connected to the high-speed shaft 443. The braking force interacts with the rotational speed of the high-speed shaft 443, causing the rotational speed of the high-speed shaft 443 to gradually decrease. This allows the high-speed rotating component to stop rotating or its rotational speed to be limited quickly and effectively, ultimately achieving the purpose of stopping or stabilizing within a safe speed range, thus ensuring the safe operation of the equipment.

[0070] In some specific embodiments, the braking mechanism 800 and the braking element are hydraulic brakes, which control the clamping and release of the brake pads through a hydraulic system. That is, when the impeller 300 is aligned with the wind direction, the control system sends a signal, the hydraulic brake clamps the brake pads, and fixes the position of the pivot 200.

[0071] In some specific embodiments, the braking mechanism 800 and the braking element are electromagnetic brakes, which control the movement of the brake pads through electromagnetic force. They are installed near the yaw gear motor 712 or the auxiliary gear 721. That is, when the yaw action is completed, the electromagnetic brake is energized to generate magnetic force, causing the brake pads to clamp the yaw gear ring 711 or the pivot 200, thereby achieving braking and positioning.

[0072] In some specific embodiments, the braking mechanism 800 and the braking element are mechanical brakes. The mechanical brakes adopt mechanical locking devices, such as ratchet and caliper structures, and are mounted on the yaw gear ring 711 or the pivot 200. When the impeller 300 is aligned with the wind direction, the mechanical brakes are locked manually or automatically to fix the position of the pivot 200.

[0073] In some specific embodiments of the present invention, a braking mechanism 800 is also included. At least one of the two impellers 300, the transmission mechanism 400, and the generator 500 is connected to the braking mechanism 800, which is used to ensure the safe operation of the equipment. In this specific embodiment, the braking mechanism 800 is located at the left end of the planetary gear set 440 and is drivenly connected to the high-speed shaft 443. In an emergency, the braking mechanism 800 can act quickly to stop the generator rotor from rotating via the high-speed shaft 443, thus preventing equipment damage or accidents.

[0074] In some specific embodiments of the present invention, the nacelle 210 is provided with a plurality of seals 211, each seal 211 being located between the nacelle 210 and the impeller 300, and the seals 211 being configured to prevent dust in the air from entering the nacelle 210.

[0075] In some specific embodiments of the present invention, the seal 211 includes a sealing cavity 2111, and a plurality of first panels 2112 and a plurality of second panels 2113 alternately arranged on the inner wall of the sealing cavity 2111 along the air flow direction, the plurality of first panels 2112 and the plurality of second panels 2113 alternately arranged to form a meandering air flow channel.

[0076] like Figure 9 and Figure 11 As shown, the nacelle 210 is equipped with four seals 211. Two seals 211 are located between each impeller 300 and the nacelle 210. It should be noted that the impeller 300, during rotation, agitates the surrounding air, making it easier for dust and other impurities in the air to move towards the nacelle 210 with the airflow. Placing the seals 211 between the nacelle 210 and the impeller 300 can block dust and other impurities from entering the nacelle 210 before they do, preventing dust from entering the interior of the nacelle 210. This protects precision equipment inside the nacelle 210, such as generators and transmission devices, preventing dust from causing wear, short circuits, and other adverse effects, extending the equipment's service life, and ensuring the stable operation of the wind power generation system.

[0077] Furthermore, in actual operation, wind direction and speed are constantly changing. In different wind speed layers or different airflow environments, when the wind direction suddenly changes or the wind speed changes drastically, the airflow state around the nacelle 210 will also change accordingly. Under certain specific combinations of wind direction and speed, the air inside the nacelle 210 may not be able to be discharged in time, while the airflow outside the nacelle 210 is affected by the new wind direction and speed, thereby causing the pressure inside the nacelle to increase relatively, forming an outward pressure difference, which blows the dust remaining on the first panel 2112 and the second panel 2113 out of the nacelle, thus realizing the self-cleaning function of the seal 211.

[0078] Furthermore, each of the first panels 2112 and the non-connection ends of the sealing cavity 2111 are provided with a first wing plate, and each of the second panels 2113 and the non-connection ends of the sealing cavity 2111 are provided with a second wing plate. The first wing plate is perpendicular to the first panel 2112, and the second wing plate is perpendicular to the second panel 2114. The two form a barrier in the airflow channel to prevent dust from entering the cabin through the airflow channel.

[0079] In some specific embodiments of the present invention, the impeller 300 includes a plurality of blades 310. The blades 310 near the nacelle 300 are installed at a certain angle α with the tower 100, wherein 2° < α < 6°. In this specific embodiment, each impeller has two blades. The installation angle between the front blade 310 and the tower 100 is 5°. Therefore, when the front blade 310 is tilted at a certain angle towards the wind direction, the blade 310 can maintain a more suitable distance from the tower 100 during rotation, so that the movement trajectory of the blade 310 is far away from the tower 100, thereby reducing the risk of the blade 310 swaying significantly and hitting the tower 100 due to the influence of wind.

[0080] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A dual-blade wind turbine generator, characterized in that, include: Tower (100); A pivot (200) is disposed inside the tower (100), the pivot (200) is coaxially arranged with the tower (100), the pivot (200) is rotatably connected to the tower (100), and a nacelle (210) is provided on the top of the pivot (200), the nacelle (210) is fixedly connected to the pivot (200); Two impellers (300) are respectively disposed at opposite ends of the nacelle (210), and the rotation direction of one impeller (300) is opposite to that of the other impeller (300). A transmission mechanism (400) is located inside the nacelle (210), and both impellers (300) are connected to the transmission mechanism (400) in a transmission manner. A generator (500) is located inside the engine room (210), and the input end of the generator (500) is connected to the output end of the transmission mechanism (400). A rotating mechanism (600) is fixedly connected to the tower (100) mechanism and rotatably connected to the pivot (200). The rotating mechanism (600) is used to support the rotation of the pivot (200). The rotating mechanism (600) includes a first bearing (610) located at the bottom of the pivot (200). A yaw mechanism (700) is provided between the tower (100) and the pivot (200). The yaw mechanism (700) is used to drive the pivot (200) to rotate about the axial direction of the tower (100) to change the orientation of the impeller (300). The yaw mechanism (700) further includes a plurality of yaw limiting components (730), which are circumferentially disposed on the tower (100). The plurality of yaw limiting components (730) are all connected to the pivot (200). The plurality of yaw limiting components (730) are evenly distributed around the periphery of the first bearing (610). The yaw limiting components (730) are configured to be radially adjustable to adjust the vertical state of the pivot (200) so that the axis of the pivot (200) remains vertical. The yaw limit assembly (730) includes an adjustment drive (731), a support (732), and an adjustment block (733). The support (732) is fixed on the tower (100), the adjustment drive (731) is mounted on the support (732), and the adjustment block (733) is drivenly connected to the output end of the adjustment drive (731). The adjustment block (733) is configured to fit the shape of the outer wall of the pivot (200). The adjustment drive (731) controls the adjustment block (733) to move radially along the pivot (200) to fine-tune the vertical state of the pivot (200). The yaw mechanism (700) includes a yaw drive assembly (710) which is mounted on the tower (100) and connected to the pivot (200). The yaw drive assembly (710) is used to provide power for the yaw motion of the pivot (200). The yaw drive assembly (710) includes: Yaw gear (711), the yaw gear (711) is disposed on the pivot (200), and the yaw gear (711) is coaxially disposed with the pivot (200); A yaw gear motor (712) is mounted on the tower (100). The yaw gear motor (712) meshes with the yaw gear so that the yaw gear ring (711) drives the pivot (200) to rotate. The yaw mechanism (700) further includes a yaw assist component (720), which is mounted on the tower (100) and connected to the pivot (200). The yaw assist component (720) assists the yaw drive component (710) to make the pivot (200) rotate smoothly. The yaw assist assembly (720) includes a plurality of auxiliary gears (721), all of which are mounted on the tower (100). Each of the auxiliary gears (721) meshes with the yaw gear ring (711). The yaw gear motor (712) and the plurality of auxiliary gears (721) are evenly distributed around the circumference of the pivot (200). The yaw gear ring (711) is coaxially sleeved on the outside of the pivot (200) and is located at the bottom of the pivot (200). The control system is electrically connected to the impeller (300), the transmission mechanism (400), the generator (500), the rotation mechanism (600), and the yaw mechanism (700), and is used to manage the operation of the equipment.

2. The dual-blade wind turbine generator according to claim 1, characterized in that, The yaw gear motor (712) is equipped with a brake that is configured to lock the yaw gear motor (712) when the yaw action stops, in order to prevent unintended rotation of the pivot (200).

3. The dual-blade wind turbine generator according to claim 1, characterized in that, The yaw drive assembly (710) also includes several meteorological sensors, which are located on at least one of the tower (100), the nacelle (210), and the impeller (300). The meteorological sensors are electrically connected to the control system. The meteorological sensors monitor meteorological data in real time and feed it back to the control system. The control system sends a command to drive the yaw gear motor (712) so that the yaw gear ring (711) drives the pivot (200) to rotate, thereby adjusting the impeller (300) to yaw and align with the wind direction.

4. The dual-blade wind turbine generator according to claim 1, characterized in that, The pivot (200) is rotatably connected to the tower (100) via the first bearing (610), the first bearing (610) being configured to support the weight of the pivot (200) and the nacelle (210) and to allow the pivot (200) to rotate within the tower (100); The rotating mechanism (600) includes a second bearing (620) disposed on the top of the pivot (200) and fixed to the inner wall of the tower (100). The second bearing (620) is configured to support the radial load of the second bearing (620).

5. The dual-blade wind turbine generator according to claim 1, characterized in that, The transmission mechanism (400) includes: Two first bevel gears (410) are provided, and each impeller (300) is provided with one first bevel gear (410). Each first bevel gear (410) is connected to the corresponding impeller (300) through a drive shaft (411). The second bevel gear (420) is meshed with the tops of the two first bevel gears (410), and the top of the second bevel gear (420) is fixedly connected to the drive shaft (421). The third bevel gear (430) is coaxially arranged with the second bevel gear (420), and the third bevel gear (430) is located at the end of the transmission shaft (421) away from the second bevel gear (420); The planetary gear set (440) has a fourth bevel gear (450) at its input end, the bottom of which meshes with the third bevel gear (430), and the output end of the planetary gear set (440) is connected to the generator (500).

6. The dual-blade wind turbine generator according to claim 5, characterized in that, The planetary gear set (440) includes a first planetary gear (441) and a second planetary gear (442). The first planetary gear (441) and the second planetary gear (442) are coaxially arranged. The input end of the first planetary gear (441) is connected to the output end of the fourth bevel gear (450). The input end of the second planetary gear (442) is connected to the output end of the first planetary gear (441). The second planetary gear (442) is located at the end of the first planetary gear (441) away from the fourth bevel gear (450). The output end of the second planetary gear (442) is connected to the high-speed shaft (443). The other end of the high-speed shaft (443) passes through the fourth bevel gear (450) and is connected to the power shaft (520) of the generator (500) through a coupling (510).

7. The dual-blade wind turbine generator according to claim 1, characterized in that, The pivot (200) is equipped with a maintenance ladder (220), which is used to enable passage between the cabin (210), the pivot (200) and the tower (100) to facilitate equipment maintenance and management.

8. The dual-blade wind turbine generator according to any one of claims 1 to 7, characterized in that, It also includes a braking mechanism (800), at least one of the two impellers (300), the transmission mechanism (400) and the generator (500) is connected to the braking mechanism (800), which is used to ensure the safe operation of the equipment.

9. The dual-blade wind turbine generator according to claim 1, characterized in that, The nacelle (210) is provided with a plurality of seals (211), each of the seals (211) being located between the nacelle (210) and the impeller (300), and the seals (211) being configured to prevent dust in the air from entering the nacelle (210).

10. The dual-blade wind turbine generator according to claim 9, characterized in that, The seal (211) includes a sealing cavity (2111) and a plurality of first panels (2112) and a plurality of second panels (2113) arranged alternately on the inner wall of the sealing cavity (2111) along the airflow direction.

11. The dual-blade wind turbine generator according to claim 1, characterized in that, The impeller (300) includes a plurality of blades (310), and the angle between the blades (310) near the nacelle and the tower (100) is α, wherein 2° < α < 6°.

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