An offshore wind power plant

Abstract

The utility model relates to wind power generation technical field discloses a kind of offshore wind power generation equipment, including tower tube, mainframe shell and blade, the tower tube top end rotation is equipped with mainframe shell, the mainframe shell one end rotation is equipped with blade, the tower tube top outer wall is equipped with fixed gear ring, the mainframe shell bottom is equipped with gear, the gear can be engaged with fixed gear ring, the mainframe shell inside is equipped with servo motor, the mainframe shell bottom two sides are fixed with electric hydraulic rod, the utility model starts servo motor and drives gear rotation, to drive mainframe shell and blade rotate around tower tube top end, so that blade deviates main wind direction 15 °-20 ° reduce wind power input, avoid blade to be directly blown by strong wind and cause damage, after angle adjustment is completed, through electric hydraulic rod piston rod extension, through the transverse sliding connection of clamping plate and electric hydraulic rod, can let fixed tooth be clamped between the teeth of fixed gear ring, guarantee the angle stability of mainframe shell.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to an offshore wind power generation device. Background Technology

[0002] Offshore wind power is a renewable energy technology that utilizes the abundant wind energy resources on the ocean surface and in the air to convert wind energy into electrical energy through wind turbine generators.

[0003] For example, an existing Chinese patent (CN221823957U) discloses a strong-wind resistant offshore wind power generation device, including a nacelle. A mounting shell is fixedly installed on the front of the nacelle, and a T-shaped ring is installed inside the mounting shell. A U-shaped shell is fixedly installed on the inner wall of the mounting shell, and two sets of pistons are connected through the inner wall of the U-shaped shell. A compression plate is fixedly installed at one end of each piston. This invention, by installing the T-shaped ring and compression plate, achieves a smooth deceleration effect on the rotating mounting hub and blades when strong winds cause the blades to rotate rapidly. The air pump operates, transmitting air pressure through the air inlet into the U-shaped shell. The air pressure pushes the pistons, causing the compression plates on both sides to compress the rotating T-shaped ring, thus effectively reducing the speed of the rotating mounting hub and blades. This effectively solves the technical problem that the blades and internal components of the equipment are easily damaged due to excessive rotation speed when facing extreme strong winds at sea.

[0004] The above technical solution uses wheel hub braking to slow down the fan blades and prevent damage to the fan blades in strong winds. However, after wheel hub braking, the fan blades still face the main strong winds, causing the blades to continuously bear extreme wind loads, and the fan blades are easily damaged under the action of the main wind force. Utility Model Content

[0005] The purpose of this invention is to provide an offshore wind power generation device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an offshore wind power generation device, comprising a tower, a main unit housing, and blades, wherein the main unit housing is rotatably mounted on the top of the tower, and blades are rotatably mounted on one end of the main unit housing; a fixed gear ring is provided on the outer wall of the top of the tower, and a gear is provided on the bottom of the main unit housing, the gear being able to mesh with the fixed gear ring; a servo motor is provided inside the main unit housing; and electro-hydraulic rods are fixed on both sides of the bottom of the main unit housing, with a clamping plate slidably mounted on one end of the electro-hydraulic rod, one end of the clamping plate being able to abut against the fixed gear ring.

[0007] Furthermore, the tower is provided with a pile foundation at its bottom end, and a wind direction sensor is provided on one side of the top outer wall of the main unit casing.

[0008] Furthermore, one end of the output shaft of the servo motor is fixedly connected to a gear, and there are four gears distributed around the fixed gear ring. There are also four servo motors.

[0009] Furthermore, a gearbox is provided on one side inside the main housing, and a main shaft is fixedly connected to one end of the input shaft of the gearbox. The blades are fixed to one end of the main shaft. A generator is provided on one side inside the main housing, and one end of the output shaft of the gearbox is fixed to one end of the input shaft of the generator.

[0010] Furthermore, a T-slot is provided at one end of the clamping plate, and a connecting wheel is rotatably connected to one end of the electro-hydraulic rod. The connecting wheel can slide within the T-slot, and limit blocks are provided at both ends of the T-slot.

[0011] Furthermore, the clamping plate is arc-shaped on the side near the fixed gear ring, and the arc-shaped side of the clamping plate is provided with fixed teeth that can mesh with the fixed gear ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention, through the design of a fixed gear ring, gears, and clamping plates, enables the offshore wind power generation equipment to operate under strong winds. A wind direction sensor detects the prevailing wind direction, and when the prevailing wind blows directly onto the blades, an electro-hydraulic rod retracts, causing the clamping plate to separate from the fixed gear ring. Then, a servo motor is activated, driving the gears to rotate, which in turn causes the main unit casing and blades to rotate around the top of the tower. This causes the blades to deviate from the prevailing wind direction by 15°-20°, reducing wind input and preventing damage from direct strong winds. After angle adjustment, the piston rod of the electro-hydraulic rod extends, moving the clamping plate towards the fixed gear ring. The lateral sliding connection between the clamping plate and the electro-hydraulic rod allows the fixed gear to engage between the teeth of the fixed gear ring, ensuring the stability of the main unit casing angle.

[0014] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0015] Figure 1 This is a perspective view of an offshore wind power generation device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the main unit housing connection structure of an offshore wind power generation device according to the present invention;

[0017] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 This is an enlarged schematic diagram of the clamp connection structure of an offshore wind power generation device according to the present invention;

[0019] Figure 5 This is a schematic diagram of the internal structure of the main unit casing of an offshore wind power generation device according to the present invention;

[0020] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0021] Figure 7 This is a top view of the internal structure of the main unit casing of an offshore wind power generation device according to this utility model;

[0022] Figure 8 for Figure 7 Enlarged structural diagram at point C.

[0023] In the diagram: 1. Pile foundation; 2. Tower; 3. Main unit casing; 4. Blade; 5. Wind direction sensor; 6. Fixed gear ring; 7. Gear; 8. Electro-hydraulic rod; 9. Clamping plate; 10. T-slot; 11. Main shaft; 12. Gearbox; 13. Generator; 14. Servo motor; 15. Fixed gear; 16. Connecting wheel. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figures 1-8This utility model provides a technical solution: an offshore wind power generation device, including a tower 2, a main unit housing 3, and blades 4. The main unit housing 3 is rotatably mounted on the top of the tower 2. The tower 2 adopts a segmented steel cylindrical structure, specifically three segments in this application, each connected by flange bolts. It includes an internal ladder, cable tray, and fall protection system. The top is reliably rotatably connected to the main unit housing 3 via double-row tapered roller bearings. Its height is designed to be 80-150 meters, allowing the blades 4 to obtain stable wind speeds. Simultaneously, resonance frequency tuning avoids the 1P / 3P vibration frequency band of the blades, preventing structural fatigue caused by wind-induced vibration. The blades 4 are rotatably mounted on one end of the main unit housing 3, which is a streamlined hull made of cast aluminum alloy. The bottom is connected to a planetary yaw mechanism via gears 7 and a fixed gear ring 6, enabling ±360° infinite rotation. Its interior employs a partitioned sealing design (IP67 protection rating) to prevent salt spray corrosion. A fixed gear ring 6 is provided on the top outer wall of the tower 2, and a gear 7 is provided on the bottom of the main housing 3. The gear 7 can mesh with the fixed gear ring 6. The fixed gear ring 6 has an external toothed ring structure and is made of 42CrMo4 alloy steel with heat treatment. It is fixed to the top flange of the tower 2 by high-strength bolts, forming a redundant drive system with the four gears 7. Even if a single gear 7 fails, the yaw function can still be maintained, ensuring the reliability of the system under strong wind conditions. The gear 7 is a spur gear with a module matching the fixed gear ring 6, and is made of 20CrMnTi carburized and quenched material.

[0026] The main casing 3 houses a servo motor 14. Electro-hydraulic rods 8 are fixed to both sides of the bottom of the main casing 3. A clamping plate 9 slides onto one end of each electro-hydraulic rod 8, and this clamping plate 9 abuts against a fixed gear ring 6. The electro-hydraulic rod 8 is a servo hydraulic cylinder with a rated thrust of 20-50kN, integrating displacement and pressure sensors. It communicates with the main control system via a CAN bus to achieve precise position control of the clamping plate 9. In emergency yaw conditions, the clamping plate 9 can fully retract within 1.5 seconds.

[0027] Blade 4 is a variable cross-section airfoil structure made of carbon fiber reinforced composite material, with a length of 90-120 meters and a root diameter of 4-5 meters. It is connected to the main shaft 11 via a fiberglass web. Its aerodynamic shape has been optimized by CFD, achieving a lift-to-drag ratio of over 85. Blade 4 has a built-in lightning protection system, including a lightning arrester and down conductor, capable of withstanding a 170kA lightning impulse current, preventing equipment damage during strong winds and thunderstorms.

[0028] The bottom of tower 2 is equipped with pile foundation 1, which serves as the seabed fixing foundation for tower 2. Pile foundation 1 is constructed of high-strength reinforced concrete and is embedded into the seabed strata using either a driven or gravity installation method. Its bottom diameter can reach 8-12 meters, and its embedment depth exceeds 30 meters, effectively resisting sea waves, currents, and seismic loads. This provides stable vertical and horizontal bearing capacity for the entire wind power generation system, ensuring that the displacement of the tower top is less than 0.5° under strong wind conditions of 25 m / s.

[0029] A wind direction sensor 5 is installed on one side of the top outer wall of the main unit housing 3. The top-mounted wind direction sensor 5 transmits data to the main control system in real time via an RS485 bus, triggering a yaw response. The wind direction sensor 5 is an ultrasonic anemometer that calculates the three-dimensional wind speed vector by measuring the time difference of sound wave propagation. It is installed in an unobstructed position on the top of the main unit housing 3 and updates its data every 100ms. When it detects that the angle between the blade 4 normal and the prevailing wind direction is less than 5°, the yaw control program is immediately initiated.

[0030] One end of the output shaft of servo motor 14 is fixedly connected to gear 7. There are four gears 7, distributed around the fixed gear ring 6. Servo motor 14 also has four gears. The four gears 7 are evenly distributed at 90° on the bottom of the main unit housing 3 and are mounted using self-aligning roller bearings, which can automatically compensate for the meshing error between the gears 7 and the fixed gear ring 6. They are connected to servo motor 14 via an expansion sleeve, transmitting a torque of up to 500 kN·m. Servo motor 14 is a permanent magnet synchronous motor with an integrated incremental encoder. The rapid wind-avoidance action is achieved by driving gear 7 through a planetary reducer.

[0031] A gearbox 12 is located inside the main housing 3 on one side. A main shaft 11 is fixedly connected to one end of the input shaft of the gearbox 12, and blades 4 are fixed to one end of the main shaft 11. A generator 13 is located inside the main housing 3 on one side, and one end of the output shaft of the gearbox 12 is fixed to one end of the input shaft of the generator 13. The main shaft 11 is supported on the main housing 3 by double-row tapered roller bearings. Its front end is connected to the blades 4 via a pitch bearing, and its rear end is connected to the input shaft of the gearbox 12 via a coupling. The gearbox 12 has a single-stage planetary gear and a two-stage parallel shaft structure. The generator 13 is a doubly-fed induction generator.

[0032] One end of the clamping plate 9 has a T-slot 10, and one end of the electro-hydraulic rod 8 is rotatably connected to a connecting wheel 16. The connecting wheel 16 can slide within the T-slot 10, and limit blocks are provided at both ends of the T-slot 10. The depth of the T-slot 10 matches the diameter of the connecting wheel 16. The limit blocks at both ends are made of polytetrafluoroethylene (PTFE), which limits the sliding stroke of the clamping plate 9 and reduces direct friction between metals.

[0033] The clamping plate 9 is arc-shaped near the fixed gear ring 6, and a fixed tooth 15 is provided on the arc-shaped side of the clamping plate 9, which can mesh with the fixed gear ring 6. The clamping plate 9 is an arc-shaped brake plate forged from high manganese steel, and its inner arc surface is machined with fixed teeth 15 that match the fixed gear ring 6. It forms a sliding pair with the connecting wheel 16 of the electro-hydraulic rod 8 through the T-slot 10, allowing for ±5° angular offset compensation and ensuring reliable meshing between the fixed teeth 15 and the fixed gear ring 6. The arc-shaped design makes the contact stress distribution uniform, and the braking load capacity reaches 800kN.

[0034] When the offshore wind power equipment is exposed to strong winds, the wind direction sensor 5 detects the main wind direction. When the main wind blows directly on the blade 4, the electro-hydraulic rod 8 retracts, causing the clamping plate 9 to separate from the fixed gear ring 6. Then, the servo motor 14 is started to drive the gear 7 to rotate, thereby causing the main casing 3 and the blade 4 to rotate around the top of the tower 2. This causes the blade 4 to deviate from the main wind direction by 15°-20° to reduce wind input and prevent the blade from being damaged by strong winds. After the angle adjustment is completed, the piston rod of the electro-hydraulic rod 8 extends, causing the clamping plate 9 to move towards the fixed gear ring 6. Through the lateral sliding connection between the clamping plate 9 and the electro-hydraulic rod 8, the fixed gear 15 can be locked between the teeth of the fixed gear ring 6 to ensure the angle stability of the main casing 3.

[0035] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. An offshore wind power generation device, comprising a tower (2), a main unit casing (3), and blades (4), characterized in that: The tower (2) has a main housing (3) rotatably mounted on its top end. One end of the main housing (3) is provided with a blade (4). The outer wall of the top of the tower (2) is provided with a fixed gear ring (6). The bottom of the main housing (3) is provided with a gear (7). The gear (7) can mesh with the fixed gear ring (6). The main housing (3) is provided with a servo motor (14). Electric hydraulic rods (8) are fixed on both sides of the bottom of the main housing (3). One end of the electric hydraulic rod (8) is provided with a clamping plate (9). One end of the clamping plate (9) can abut against the fixed gear ring (6).

2. The offshore wind power generation equipment according to claim 1, characterized in that: The bottom of the tower (2) is provided with a pile foundation (1), and the top outer wall of the main unit casing (3) is provided with a wind direction sensor (5).

3. The offshore wind power generation equipment according to claim 1, characterized in that: One end of the output shaft of the servo motor (14) is fixedly connected to the gear (7). There are four gears (7), which are distributed around the fixed gear ring (6). There are also four servo motors (14).

4. The offshore wind power generation equipment according to claim 1, characterized in that: A gearbox (12) is provided on one side inside the main housing (3). One end of the input shaft of the gearbox (12) is fixedly connected to a main shaft (11). The blade (4) is fixed on one end of the main shaft (11). A generator (13) is provided on one side inside the main housing (3). One end of the output shaft of the gearbox (12) is fixed to one end of the input shaft of the generator (13).

5. The offshore wind power generation equipment according to claim 1, characterized in that: The clamping plate (9) has a T-slot (10) at one end, and the electric hydraulic rod (8) is rotatably connected to a connecting wheel (16) at one end. The connecting wheel (16) can slide in the T-slot (10), and the T-slot (10) has limit blocks at both ends.

6. The offshore wind power generation equipment according to claim 5, characterized in that: The clamping plate (9) is arc-shaped on the side near the fixed gear ring (6), and the clamping plate (9) is provided with a fixed tooth (15) on the arc-shaped side, which can mesh with the fixed gear ring (6).

Images