Offshore wind power generation device and power generation method

Abstract

The application discloses a kind of offshore wind power generation device and power generation method, including tower, generator unit is installed on the outer wall of one side of the tower, and the driving end of generator unit is vertically upwards and is installed with vertical main shaft, the top of vertical main shaft extends upwards and is installed with several equidistant three-pronged frame, and windward board is installed between the end of multiple three-pronged frame in vertical direction.The application starts action by electric three-channel hydraulic distribution assembly and synchronously sends hydraulic oil into double-position caliper brake assembly and hydraulic clamp type alignment auxiliary brake assembly, double-position caliper brake assembly forms primary friction braking to vertical main shaft, and hydraulic clamp type alignment auxiliary brake assembly forms secondary friction braking with steel sleeve on vertical main shaft, so as to form large range braking force in the extension direction of vertical main shaft.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power generation technology, specifically to an offshore wind power generation device and a power generation method. Background Technology

[0002] Vertical axis offshore wind power generation devices are green energy equipment that converts offshore wind energy into electrical energy. They have significant advantages such as simple structure, unaffected by wind direction, and adaptability to multiple wind directions. They are widely used in offshore wind farms, and their main function is to efficiently capture strong wind resources at sea to provide stable and clean electricity to the power grid. These power generation devices generally consist of a rotor, bearing system, generator, foundation structure, and control system. The rotor includes a vertical shaft and multiple blades. The blades rotate under the action of wind, driving the shaft to rotate. Mechanical energy is transferred to the generator through the shaft. Under the action of the magnetic field inside the generator, the mechanical energy is converted into alternating current. After regulation, a stable electrical energy is output to supply the offshore power grid or energy storage system. Its working principle is that the wind drives the blades to rotate, and mechanical energy is converted into electrical energy. The whole process does not require adjustment of wind direction, making it highly adaptable. It can start at low wind speeds and adapt to multi-wind direction environments, making it particularly suitable for complex offshore environments.

[0003] As disclosed in CN114426080A, a vertical offshore wind power generation device includes a floating platform and a generator. The floating platform is equipped with a wind-gathering device that converts lateral wind force on the sea surface into longitudinal wind force through a wind-gathering duct. The wind-gathering device includes a ventilation duct vertically mounted on the floating platform, a wind-collecting component located at the bottom of the ventilation duct and guiding wind force into the ventilation duct through a duct, and a flow-guiding component rotatably connected to the top of the ventilation duct, capable of rotating with the wind and guiding the airflow upward within the ventilation duct. The ventilation duct also contains a power generation device that rotates under the influence of longitudinal wind force and transfers kinetic energy to the generator. This device can withstand severe weather conditions with excessively strong winds. While the generator won't be damaged due to excessively high impeller speed, the aforementioned technical solution still requires a braking device to actively decelerate the generator main shaft when it rotates too fast. However, existing vertical axis offshore wind power generation devices typically use mechanical braking, i.e., friction braking between the brake disc and brake pads. This design often only applies braking force to a certain part or specific area of ​​the main shaft. Due to the space and structural limitations of the generator's vertical axis main shaft, the braking device often cannot cover the entire length or area of ​​the main shaft and can only achieve braking in a limited area. This local braking method leads to uneven distribution of braking force, affecting the overall braking effect. Summary of the Invention

[0004] The purpose of this invention is to provide an offshore wind power generation device and method. When the vertical main shaft of the generator needs to decelerate due to excessive speed, the electric three-channel hydraulic distribution assembly starts to operate and synchronously sends hydraulic oil into the dual-position caliper brake assembly and the hydraulic caliper alignment auxiliary brake assembly. The dual-position caliper brake assembly forms a first-stage friction brake on the vertical main shaft, while the hydraulic caliper alignment auxiliary brake assembly forms a second-stage friction brake with the steel sleeve on the vertical main shaft. This generates a large-scale braking force in the extension direction of the vertical main shaft, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an offshore wind power generation device, comprising;

[0006] A tower is provided, on one outer wall of which a generator set is installed. The drive end of the generator set is vertically upward and has a vertical main shaft installed. The top of the vertical main shaft extends upward and has several equally spaced tridents installed. Wind vanes are installed between the ends of the multiple tridents in the vertical direction. An emergency braking device is installed on the outer wall of the tower above the generator set. A multi-hole brake disc and a steel sleeve are respectively fixed at both ends of the surface of the vertical main shaft.

[0007] A dual-position caliper brake assembly is mounted on one outer wall of the tower and is used to cooperate with a multi-hole brake disc. A hydraulic caliper-type alignment auxiliary brake assembly is installed on the outer wall of the tower above the dual-position caliper brake assembly to cooperate with the steel sleeve and reduce the vertical spindle speed. An electric three-channel hydraulic distribution assembly that supplies hydraulic oil to the dual-position caliper brake assembly and the hydraulic caliper-type alignment auxiliary brake assembly is installed on one outer wall of the tower.

[0008] Preferably, the electric three-channel hydraulic distribution assembly includes a motor mount fixed to one outer wall of the tower, a cylindrical cylinder mounted on the outer wall of the motor mount near the dual-position caliper brake assembly, and a piston rod hinged to the outer wall of the piston inside the cylindrical cylinder. One end of the piston rod extends through the outside of the cylindrical cylinder and is fixed with a connector. A stepper motor is mounted on the back of the motor mount. The drive shaft of the stepper motor extends through the outer surface of the motor mount and is fixed with an eccentric wheel. The eccentric wheel and the connector are hinged to each other. A three-way oil supply seat connected to the dual-position caliper brake assembly and the hydraulic caliper-type alignment auxiliary brake assembly is mounted on one side of the top of the cylindrical cylinder.

[0009] Preferably, the dual-position caliper brake assembly includes a shaft bracket fixed on one side of the tower outer wall, a hollow shaft plate fixed on the side of the shaft bracket away from the motor base, and dual-piston calipers mounted on both ends of the hollow shaft plate surface. Both dual-piston calipers receive hydraulic oil from the cylindrical cylinder through a three-way oil supply seat and actuate to clamp the perforated brake disc.

[0010] Preferably, a first oil supply pipe and a second oil supply pipe are respectively installed on both sides of the top of the three-way oil supply seat. The ends of the first oil supply pipe and the second oil supply pipe away from the three-way oil supply seat are connected to the oil inlet of the dual-piston caliper. An oil nozzle is provided on one side of the top of the three-way oil supply seat of the second oil supply pipe. A third oil supply pipe for connecting to the oil inlet of the hydraulic caliper type alignment auxiliary brake assembly is installed inside the oil nozzle.

[0011] Preferably, an oil supply tank is installed on one outer wall of the motor base, and a flexible hose connected to the cylindrical cylinder is installed at the bottom of the oil supply tank.

[0012] Preferably, the hydraulic clamp-type positioning auxiliary brake assembly includes a lifting unit mounted on one side of the outer wall of the tower, a hollow frame fixed on the moving end of the lifting unit and coaxial with the vertical main shaft, a hydraulic cylinder hinged to one side of the outer wall of the hollow frame, and a gear-type U-clamp structure mounted on the top of the hollow frame for being driven by the hydraulic cylinder. One end of the third oil supply pipe is connected to the cylinder inlet end of the hydraulic cylinder, and a shaft rotation support frame is mounted on the outer wall of the tower above the gear-type U-clamp structure.

[0013] Preferably, the gear-type U-shaped caliper structure includes a main gear shaft and a secondary gear shaft rotatably mounted on one side of the outer wall of the hollow frame, and a lower U-shaped brake caliper and an upper U-shaped brake caliper whose ends extend into the interior of the hollow frame and are fixed. A centrally located annular gear disk is also rotatably mounted on one side of the outer wall of the hollow frame. The centrally located annular gear disk meshes with both the secondary gear shaft and the main gear shaft. A Y-shaped connector is hinged to the outer wall of the lower U-shaped brake caliper on the side away from the hollow frame. The bottom end of the Y-shaped connector is fixedly connected to the top end of the piston rod of the hydraulic cylinder.

[0014] Preferably, the lifting unit includes a U-shaped corner frame installed on the outer wall of the other side of the tower, a screw electric linear module installed inside the U-shaped corner frame, and a support platform installed on the moving end of the screw electric linear module. The hollow frame is fixed on one side of the outer wall of the support platform.

[0015] Preferably, a return spring is fixed to the bottom end of the Y-shaped connector, the return spring and the piston rod of the hydraulic cylinder are fitted together, and the bottom end of the return spring is fixedly connected to the top end of the cylinder body of the hydraulic cylinder.

[0016] The present invention also provides a method for offshore wind power generation, as described above with an offshore wind power generation device, comprising the following steps:

[0017] S101: When the wind speed is too high, the power grid demand is reduced, or the machine needs to be stopped and slowed down, the electric three-channel hydraulic distribution assembly synchronously supplies hydraulic oil to the dual-position caliper brake assembly and the hydraulic caliper positioning auxiliary brake assembly. The oil circuit design of the electric three-channel hydraulic distribution assembly is for the first-stage braking at the dual-position caliper brake assembly and the second-stage braking at the hydraulic caliper positioning auxiliary brake assembly.

[0018] S102: The symmetrically distributed caliper arms of the dual-position caliper brake assembly clamp the perforated brake disc on the vertical spindle under hydraulic drive. The kinetic energy of the vertical spindle rotation is converted into heat energy dissipation through friction, and the speed of the vertical spindle is gradually reduced.

[0019] S103: The hydraulic caliper type alignment auxiliary brake assembly serves as a secondary braking component. It cooperates with the steel sleeve surrounding the outside of the vertical main shaft. The hydraulic caliper type alignment auxiliary brake assembly retracts radially under the drive of hydraulic oil and fits tightly against the surface of the steel sleeve, generating continuous frictional resistance along the axial direction of the vertical main shaft. This extends the braking force range from the local area of ​​the perforated brake disc to the extension direction of the vertical main shaft.

[0020] S104: After the braking action of the generator set and the vertical spindle is completed, the electric three-channel hydraulic distribution assembly resets and the oil flows back. Then, the dual-position caliper brake assembly and the hydraulic caliper positioning auxiliary brake assembly stop the braking action. The vertical spindle continues to rotate driven by the wind vane and the sea breeze. The rotation of the vertical spindle directly drives the magnetic field change in the generator set, inducing alternating current in the stator winding. The alternating current is processed by the rectifier and inverter connected to the generator set into power output that meets the grid standards. After rectification and regulation, the output is stable power and supplied to the offshore power grid or energy storage equipment.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: This offshore wind power generation device and method comprises a generator set, a vertical main shaft, a windward plate, an electric three-channel hydraulic distribution assembly, a dual-position caliper brake assembly, a brake disc, a hydraulic caliper-type alignment auxiliary brake assembly, and a steel sleeve, etc., which cooperate with each other. The electric three-channel hydraulic distribution assembly initiates operation and synchronously delivers hydraulic oil to the dual-position caliper brake assembly and the hydraulic caliper-type alignment auxiliary brake assembly. The dual-position caliper brake assembly forms a primary friction braking force on the vertical main shaft, while the hydraulic caliper-type alignment auxiliary brake assembly forms a secondary friction braking force with the steel sleeve on the vertical main shaft, thereby generating a wide-range braking force in the extension direction of the vertical main shaft; wherein the primary friction braking... The dual-position caliper brake assembly forms a basic braking force on the vertical spindle, ensuring rapid deceleration when the vertical spindle rotates at high speed. As braking demand increases, the hydraulic caliper-type positioning auxiliary brake assembly forms a secondary friction with the steel sleeve, providing stronger braking force. Through a progressively reinforced design, it avoids mechanical shock and vibration caused by sudden heavy braking, reduces the mechanical stress of the equipment, and disperses the braking force through multiple braking points, reducing the pressure and temperature on individual friction surfaces, effectively controlling the wear of friction pads and steel sleeves, and improving the overall durability of the braking system. Especially in complex marine environments, where equipment needs to cope with changing operating conditions, multi-stage braking can provide more stable braking performance, ensuring effective braking under various operating conditions.

[0022] Secondly, the electric three-channel hydraulic distribution assembly synchronously delivers hydraulic oil to the dual-position caliper brake assembly and the hydraulic caliper-type alignment auxiliary brake assembly, forming a wide friction area along the extension direction of the vertical main shaft. This ensures that the braking force is not concentrated at a single point but distributed along the extension direction of the main shaft, forming a larger friction surface and generating a greater braking torque. As a result, the resistance experienced by the vertical main shaft of the generator unit during deceleration is more uniform and stronger, ensuring a fast and smooth deceleration effect and avoiding problems of excessive or insufficient braking in certain areas. Furthermore, through the electric three-channel hydraulic distribution assembly, multiple braking components can operate simultaneously, ensuring the synchronicity of braking force and reducing mechanical vibration and impact caused by uncoordinated braking, further ensuring the safe operation of the equipment.

[0023] Finally, the multi-stage, multi-zone braking structure has good safety redundancy. If a braking part fails or malfunctions, other braking units can still function to ensure the braking capability of the equipment in emergency situations. The redundancy design greatly improves the safety of wind turbine units, especially in the complex and changeable marine environment, ensuring that the power generation equipment can be shut down in a timely and safe manner in case of emergencies. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the tower of the present invention;

[0028] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0029] Figure 6 This is a schematic diagram of the three-dimensional structure of the dual-position caliper brake assembly of the present invention. Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the three-dimensional structure of the dual-position caliper brake assembly of the present invention. Figure 2 ;

[0031] Figure 8 This is a schematic diagram of the three-dimensional structure of the electric three-channel hydraulic distribution assembly according to Embodiment 2 of the present invention. Figure 1 ;

[0032] Figure 9 This is a schematic diagram of the three-dimensional structure of the electric three-channel hydraulic distribution assembly according to Embodiment 2 of the present invention. Figure 2 ;

[0033] Figure 10 This is a schematic diagram of the three-dimensional structure of the hydraulic clamp-type alignment auxiliary brake assembly according to Embodiment 3 of the present invention. Figure 1 ;

[0034] Figure 11 This is a schematic diagram of the three-dimensional structure of the hydraulic clamp-type alignment auxiliary brake assembly according to Embodiment 3 of the present invention. Figure 2 ;

[0035] Figure 12 This is a three-dimensional structural diagram of the gear-type U-clamp structure according to Embodiment 3 of the present invention.

[0036] In the diagram: 1. Tower; 2. Generator unit; 3. Vertical spindle; 4. Tripod; 5. Wind vane; 6. Shaft support frame; 7. Emergency braking device; 8. Dual-position caliper brake assembly; 801. Shaft bracket; 802. Hollow shaft plate; 803. Dual-piston caliper; 9. Electric three-channel hydraulic distribution assembly; 901. Motor mount; 902. Cylindrical cylinder block; 903. Three-way oil supply seat; 9031. First oil supply pipe; 9032. Second oil supply pipe; 9033. Oil nozzle; 9034. Third oil supply pipe; 904. Stepper motor; 905. Eccentric wheel; 906. Piston rod 907. Connector; 908. Oil supply tank; 10. Hydraulic caliper type alignment auxiliary brake assembly; 1001. U-shaped bracket with corner side; 1002. Screw electric linear module; 1003. Support platform; 1004. Hollow frame; 1005. Hydraulic cylinder; 1006. Gear-type U-caliper structure; 10061. Main gear shaft; 10062. Secondary gear shaft; 10063. Lower U-shaped brake caliper; 10064. Upper U-shaped brake caliper; 10065. Centrally placed annular gear disc; 10066. Y-joint; 1007. Return spring; 11. Multi-hole brake disc; 12. Steel sleeve. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Example 1, by Figures 1 to 7 The present invention includes a tower 1, a generator set 2 is installed on one outer wall of the tower 1, and the drive end of the generator set 2 is vertically upward and is equipped with a vertical main shaft 3. The top end of the vertical main shaft 3 extends upward and is equipped with a plurality of equally spaced triangular supports 4. A wind-facing plate 5 is installed between the ends of the plurality of triangular supports 4 in the vertical direction. An emergency braking device 7 is installed on the outer wall of the tower 1 above the generator set 2. A multi-hole brake disc 11 and a steel sleeve 12 are respectively fixed at both ends of the surface of the vertical main shaft 3.

[0039] A dual-position caliper brake assembly 8 is mounted on one side of the outer wall of the tower 1 and is used to cooperate with the multi-hole brake disc 11. A hydraulic caliper-type alignment auxiliary brake assembly 10 is installed on the outer wall of the tower 1 above the dual-position caliper brake assembly 8 to cooperate with the steel sleeve 12 and reduce the speed of the vertical spindle 3. An electric three-channel hydraulic distribution assembly 9 is installed on one side of the outer wall of the tower 1 to supply hydraulic oil to the dual-position caliper brake assembly 8 and the hydraulic caliper-type alignment auxiliary brake assembly 10.

[0040] This embodiment of an offshore wind power generation method, such as the offshore wind power generation device described above, includes the following steps:

[0041] S101: When the wind speed is too high, the power grid demand is reduced, or the machine needs to be stopped and slowed down, the electric three-channel hydraulic distribution assembly 9 synchronously supplies hydraulic oil to the dual-position caliper brake assembly 8 and the hydraulic caliper positioning auxiliary brake assembly 10. The oil circuit design of the electric three-channel hydraulic distribution assembly 9 is for the first-stage braking at the dual-position caliper brake assembly 8 and the second-stage braking at the hydraulic caliper positioning auxiliary brake assembly 10 respectively.

[0042] S102: The caliper arms of the dual-position caliper brake assembly 8 are symmetrically distributed and clamp the perforated brake disc 11 on the vertical spindle 3 under hydraulic drive. The kinetic energy of the rotation of the vertical spindle 3 is converted into heat energy dissipation through friction and the rotation speed of the vertical spindle 3 is gradually reduced.

[0043] S103: The hydraulic caliper type alignment auxiliary brake assembly 10 serves as a secondary braking component. It cooperates with the steel sleeve 12 surrounding the outside of the vertical main shaft 3. The hydraulic caliper type alignment auxiliary brake assembly 10 retracts radially under the drive of hydraulic oil and fits tightly against the surface of the steel sleeve 12, generating continuous frictional resistance along the axial direction of the vertical main shaft 3. This extends the braking force range from the local area of ​​the perforated brake disc 11 to the extension direction of the vertical main shaft 3.

[0044] S104: After the braking action of generator set 2 and vertical spindle 3 is completed, the electric three-channel hydraulic distribution assembly 9 is reset and the oil flows back. Then, the dual-position caliper brake assembly 8 and the hydraulic caliper alignment auxiliary brake assembly 10 stop the braking action. The vertical spindle 3 continues to be driven to rotate by the wind vane 5 and the sea breeze. The rotation of the vertical spindle 3 directly drives the magnetic field change in generator set 2, inducing alternating current in the stator winding. The alternating current is processed by the rectifier and inverter connected to generator set 2 into power output that meets the grid standard. After rectification and regulation, the output is stable power and supplied to the offshore grid or energy storage equipment.

[0045] Example 2, based on Example 1, is... Figure 8 and Figure 9 The electric three-channel hydraulic distribution assembly 9 includes a motor base 901 fixed on one side of the outer wall of the tower 1, a cylindrical cylinder 902 mounted on the outer wall of the motor base 901 near the dual-position caliper brake assembly 8, and a piston rod 906 hinged to the outer wall of the piston inside the cylindrical cylinder 902. One end of the piston rod 906 extends through to the outside of the cylindrical cylinder 902 and is fixed with a connector 907. A stepper motor 904 is mounted on the back of the motor base 901. The drive shaft of the stepper motor 904 extends through to the outside of the motor base 901 and is fixed with an eccentric wheel 905. The eccentric wheel 905 and the connector 907 are hinged to each other. A three-way oil supply seat 903, which is connected to the dual-position caliper brake assembly 8 and the hydraulic caliper type alignment auxiliary brake assembly 10, is mounted on one side of the top of the cylindrical cylinder 902.

[0046] The dual-position caliper brake assembly 8 includes a shaft bracket 801 fixed to one side of the outer wall of the tower 1, a hollow shaft plate 802 fixed to the outer wall of the shaft bracket 801 away from the motor base 901, and dual-piston calipers 803 mounted on both ends of the surface of the hollow shaft plate 802. Both dual-piston calipers 803 receive hydraulic oil from the cylindrical cylinder 902 through the three-way oil supply seat 903 and actuate to clamp the perforated brake disc 11. The electric three-channel hydraulic distribution assembly 9 is a dual-position caliper brake assembly 8 and a hydraulic caliper alignment auxiliary. When hydraulic fluid is supplied to the brake assembly 10, the stepper motor 904 is controlled by the control system of the offshore wind power generation device. The drive shaft of the stepper motor 904 drives the eccentric wheel 905 to rotate. During the rotation of the eccentric wheel 905, the eccentric wheel 905 drives the piston rod 906 and the piston to move into the cylindrical cylinder 902 through the connector 907. During this process, the end of the piston rod 906 away from the connector 907 is hinged to the piston to ensure that the piston moves to the left or right under the pull of the piston rod 906.

[0047] The top two sides of the three-way oil supply seat 903 are respectively equipped with a first oil supply pipe 9031 and a second oil supply pipe 9032. The ends of the first oil supply pipe 9031 and the second oil supply pipe 9032 away from the three-way oil supply seat 903 are connected to the oil inlet of a dual-piston caliper 803. When the piston in the cylindrical cylinder 902 moves toward the three-way oil supply seat 903, the hydraulic oil in the cylindrical cylinder 902 is forced into the three-way oil supply seat 903, and then distributed by the three-way oil supply seat 903 to the dual-position caliper brake assembly 8 and the hydraulic caliper alignment auxiliary brake assembly 10. In this way, the hydraulic oil is distributed to the dual-position caliper brake assembly 8 and the hydraulic caliper alignment auxiliary brake assembly 10 according to a preset path, and the adjustment of multiple hydraulic circuits is realized.

[0048] A nozzle 9033 is provided at the top of the three-way oil supply seat 903 on one side of the second oil supply pipe 9032. The nozzle 9033 is equipped with a third oil supply pipe 9034 for connecting with the oil inlet of the hydraulic caliper type alignment auxiliary brake assembly 10. The piston rod 906 and the piston supply hydraulic oil to the two dual-piston calipers 803 through the first oil supply pipe 9031 and the second oil supply pipe 9032 respectively, so that the two dual-piston calipers 803 move synchronously and rub against the multi-hole brake disc 11 to achieve braking and deceleration effects. The two dual-piston calipers 803 provide greater braking force and more uniform pressure distribution, ensuring more stable and reliable braking effect.

[0049] An oil supply tank 908 is installed on one outer wall of the motor base 901. A hose connected to the cylindrical cylinder 902 is installed at the bottom of the oil supply tank 908. After the dual-position caliper brake assembly 8 and the hydraulic caliper alignment auxiliary brake assembly 10 complete the braking and deceleration actions, the electric three-channel hydraulic distribution assembly 9 is reset. Then, the hydraulic oil in the dual-position caliper brake assembly 8 and the hydraulic caliper alignment auxiliary brake assembly 10 returns to the cylindrical cylinder 902. During this process, the oil supply tank 908 plays the role of stabilizing the oil supply.

[0050] The synchronous delivery mechanism of hydraulic oil enables the dual-position caliper brake assembly 8 and the hydraulic caliper alignment auxiliary brake assembly 10 to operate in a consistent sequence, reducing the fluctuation of braking force caused by response delay. Furthermore, if any channel fails, the basic braking function can still be maintained through the remaining channel, greatly improving braking reliability.

[0051] Example 3, based on Example 1, is... Figure 10 , Figure 11 and Figure 12 The hydraulic clamp-type positioning auxiliary brake assembly 10 includes a lifting unit mounted on one side of the outer wall of the tower 1, a hollow frame 1004 fixed to the moving end of the lifting unit and coaxial with the vertical main shaft 3, a hydraulic cylinder 1005 hinged to one side of the outer wall of the hollow frame 1004, and a gear-type U-clamp structure 1006 mounted on the top of the hollow frame 1004 for being driven by the hydraulic cylinder 1005. One end of the third oil supply pipe 9034 is connected to the cylinder inlet end of the hydraulic cylinder 1005. A gear-type U-clamp structure 1006 is mounted on the outer wall of the tower 1 above the gear-type U-clamp structure 1006. Equipped with a shaft rotation support frame 6, while the dual-position caliper brake assembly 8 is driven by the electric three-channel hydraulic distribution assembly 9, a portion of the hydraulic oil in the cylindrical cylinder 902 also enters the hydraulic cylinder 1005 through the oil nozzle 9033 and the third oil supply pipe 9034. Subsequently, the piston rod of the hydraulic cylinder 1005 drives the gear-type U-clamp structure 1006 to start moving, causing the gear-type U-clamp structure 1006 to make frictional contact with the steel sleeve 12. At this time, the steel sleeve 12 and the gear-type U-clamp structure 1006 form a high-rigidity braking interface to ensure the reliability of torque transmission.

[0052] The gear-type U-shaped caliper structure 1006 includes a main gear shaft 10061 and a secondary gear shaft 10062 rotatably mounted on one side of the outer wall of the hollow frame 1004, and a lower U-shaped brake caliper 10063 and an upper U-shaped brake caliper 10064, one end of the main gear shaft 10061 and the secondary gear shaft 10062 being fixed inside the hollow frame 1004. A centrally located annular gear disc 10065 is also rotatably mounted on one side of the outer wall of the hollow frame 1004. The centrally located annular gear disc 10065 and the secondary gear shaft 10066 are also rotatably mounted on the outer wall of the hollow frame 1004. 062. The main gear shaft 10061 is fully engaged. A Y-joint 10066 is hinged to the outer wall of the lower U-shaped brake caliper 10063 on the side away from the hollow frame 1004. The bottom end of the Y-joint 10066 is fixedly connected to the top end of the piston rod of the hydraulic cylinder 1005. A return spring 1007 is fixed to the bottom end of the Y-joint 10066. The return spring 1007 and the piston rod of the hydraulic cylinder 1005 are fitted together. The bottom end of the return spring 1007 is fixedly connected to the top end of the cylinder body of the hydraulic cylinder 1005.

[0053] When the piston rod of the hydraulic cylinder 1005 extends actively, the hydraulic cylinder 1005 drives the lower U-shaped brake caliper 10063 to shift towards the vertical axis of the main shaft 3 through the Y-joint 10066 until the lower U-shaped brake caliper 10063 contacts the steel sleeve 12. At this time, the main gear shaft 10061 is driven to rotate, and the return spring 1007 is in a stretched deformation state. The main gear shaft 10061 will drive the secondary gear shaft 10062 to rotate through the central ring gear disk 10065, so that the upper U-shaped brake caliper 10064 also swings and approaches towards the vertical axis of the main shaft 3. Then, the lower U-shaped brake caliper 10063 and the upper U-shaped brake caliper 10064 rub against the steel sleeve 12 and reduce the speed of the vertical main shaft 3. The axial braking force is expanded and the circumferential pressure is balanced, avoiding the stress concentration caused by traditional local braking.

[0054] The lifting unit includes a U-shaped corner frame 1001 installed on the outer wall of the other side of the tower 1, a screw electric linear module 1002 installed inside the U-shaped corner frame 1001, and a support platform 1003 installed on the moving end of the screw electric linear module 1002. The hollow frame 1004 is fixed on one side of the outer wall of the support platform 1003. In order to reduce the braking maintenance cycle and frequency of the device, the operator can control the screw electric linear module 1002 through the control system of the offshore wind power generation device. The screw electric linear module 1002 drives the support platform 1003 and the hollow frame 1004 to move in the axial direction of the steel sleeve 12 to change the contact position between the gear-type U-clamp structure 1006 and the steel sleeve 12. This supports quick replacement of the braking point without disassembling the main shaft or braking assembly, which greatly improves the convenience of maintenance, reduces downtime, and extends the replacement cycle of key components.

[0055] In this embodiment, wind energy is first captured by several equally spaced wind-facing plates 5, converting kinetic energy into mechanical energy. As the sea breeze passes through the wind-facing plates 5, which are connected to the vertical main shaft 3, the vertical main shaft 3 rotates, transmitting the rotational motion to the generator set 2. This rotation directly drives changes in the magnetic field within the generator set 2, inducing alternating current in the stator windings. If a gearbox is included in the generator set 2, the speed of the vertical main shaft 3 is increased to the required high-efficiency power generation range through a speed-increasing gear set. The resulting power is then processed by a rectifier-inverter connected to the generator set 2 to produce power that meets grid standards. At this point, the power output is stabilized after rectification and regulation and supplied to the offshore power grid or energy storage equipment. When the wind speed is too high, the grid demand decreases, or the unit needs to be stopped to slow down, the cloud control system of the offshore wind power generation unit initiates a braking command. After receiving the signal, the electric three-channel hydraulic distribution assembly 9 synchronously supplies hydraulic oil to the dual-position caliper brake assembly 8 and the hydraulic caliper positioning auxiliary brake assembly 10. The oil circuit channels of the electric three-channel hydraulic distribution assembly 9 are designed to correspond to the primary braking and secondary braking, respectively, to ensure that the braking function can still be maintained through the redundant path in the event of a failure of any channel. The dual-position caliper brake assembly 8, as the primary braking unit, has symmetrically distributed caliper arms that clamp under hydraulic drive. The perforated brake disc 11, mounted on the vertical spindle 3, converts the kinetic energy of the rotating vertical spindle 3 into heat energy through friction, gradually reducing the rotational speed of the vertical spindle 3. The dual-position layout ensures that the braking force is evenly applied to both sides of the perforated brake disc 11, avoiding uneven loading or vibration caused by unilateral pressure, while simultaneously rapidly reducing the spindle speed. The hydraulic caliper-type alignment auxiliary brake assembly 10, as a secondary braking unit, cooperates with the steel sleeve 12 surrounding the vertical spindle 3. Driven by hydraulic oil, the hydraulic caliper-type alignment auxiliary brake assembly 10 radially contracts and tightly adheres to the surface of the steel sleeve 12, generating continuous frictional resistance along the axial direction of the vertical spindle 3, thereby extending the braking force range from... The perforated brake disc 11 extends locally into the direction of the vertical spindle 3, forming an "axial wrapping" braking effect until the vertical spindle 3 decelerates to a reasonable speed range. After the braking action is completed, the electric three-channel hydraulic distribution assembly 9 resets and the oil flows back. Then, the dual-position caliper brake assembly 8 and the hydraulic caliper alignment auxiliary brake assembly 10 stop the braking action, and the vertical spindle 3 continues to rotate driven by the wind vane 5 and the sea breeze. When the device is shut down for maintenance, the operator performs necessary maintenance and inspection, including checking the wear of the perforated brake disc 11 and the steel sleeve 12, and the hydraulic oil pressure in the electric three-channel hydraulic distribution assembly 9, to ensure the continuous and stable operation of the device.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An offshore wind power generation device, characterized in that, include: A tower is provided, on one outer wall of which a generator set is installed. The drive end of the generator set is vertically upward and has a vertical main shaft installed. The top of the vertical main shaft extends upward and has several equally spaced tridents installed. Wind vanes are installed between the ends of the multiple tridents in the vertical direction. An emergency braking device is installed on the outer wall of the tower above the generator set. A multi-hole brake disc and a steel sleeve are respectively fixed at both ends of the surface of the vertical main shaft. A dual-position caliper brake assembly is mounted on one outer wall of the tower and is used to cooperate with a multi-hole brake disc. Above the dual-position caliper brake assembly, on the outer wall of the tower, is a hydraulic caliper-type alignment auxiliary brake assembly that cooperates with a steel sleeve and reduces the vertical spindle speed. An electrically powered three-channel hydraulic distribution assembly is mounted on one outer wall of the tower to supply hydraulic oil to the dual-position caliper brake assembly and the hydraulic caliper-type alignment auxiliary brake assembly. The electrically powered three-channel hydraulic distribution assembly includes a motor mount fixed to one outer wall of the tower, a cylindrical cylinder mounted on the outer wall of the motor mount near the dual-position caliper brake assembly, and a piston rod hinged to the outer wall of the piston inside the cylindrical cylinder. One end of the piston rod extends through the outside of the cylindrical cylinder and is fixed with a connector. A stepper motor is mounted on the back of the motor mount, and the drive shaft of the stepper motor extends through the outer surface of the motor mount and is fixed with an eccentric wheel. The eccentric wheel and the connector are hinged together. A three-way oil supply seat is installed on one side of the top of the cylindrical cylinder, which is connected to the dual-position caliper brake assembly and the hydraulic caliper alignment auxiliary brake assembly. The dual-position caliper brake assembly includes a shaft frame fixed on one side of the outer wall of the tower, a hollow shaft plate fixed on the outer wall of the shaft frame away from the motor base, and dual-piston calipers installed at both ends of the surface of the hollow shaft plate. Both dual-piston calipers receive hydraulic oil from the cylindrical cylinder through the three-way oil supply seat and actuate to clamp the perforated brake disc. A first oil supply pipe and a second oil supply pipe are respectively installed on both sides of the top of the three-way oil supply seat. The ends of the first oil supply pipe and the second oil supply pipe away from the three-way oil supply seat are connected to the oil inlet end of the dual-piston caliper. An oil nozzle is provided on one side of the second oil supply pipe and the top of the three-way oil supply seat. A third oil supply pipe for connecting to the oil inlet end of the hydraulic caliper alignment auxiliary brake assembly is installed inside the oil nozzle. The hydraulic clamp-type positioning auxiliary brake assembly includes a lifting unit installed on one side of the outer wall of the tower, a hollow frame fixed on the moving end of the lifting unit and coaxial with the vertical main shaft, a hydraulic cylinder hinged on one side of the outer wall of the hollow frame, and a gear-type U-clamp structure installed on the top of the hollow frame for being driven by the hydraulic cylinder. One end of the third oil supply pipe is connected to the cylinder inlet end of the hydraulic cylinder. A shaft rotation support frame is installed on the outer wall of the tower above the gear-type U-clamp structure. The gear-type U-clamp structure includes a main gear shaft and a secondary gear shaft rotatably mounted on one side of the outer wall of the hollow frame, as well as a lower U-shaped brake caliper and an upper U-shaped brake caliper that extend from the main gear shaft and the secondary gear shaft into the interior of the hollow frame and are fixed at one end. A centrally located annular gear disk is also rotatably mounted on one side of the outer wall of the hollow frame. The centrally located annular gear disk meshes with both the secondary gear shaft and the main gear shaft. A Y-shaped connector is hinged to the outer wall of the lower U-shaped brake caliper on the side away from the hollow frame. The bottom end of the Y-shaped connector is fixedly connected to the top end of the piston rod of the hydraulic cylinder.

2. The offshore wind power generation device according to claim 1, characterized in that: An oil supply tank is installed on one side of the outer wall of the motor base, and a flexible hose connected to the cylindrical cylinder is installed at the bottom of the oil supply tank.

3. The offshore wind power generation device according to claim 2, characterized in that: The lifting unit includes a U-shaped corner frame installed on the outer wall of the other side of the tower, a screw electric linear module installed inside the U-shaped corner frame, and a support platform installed on the moving end of the screw electric linear module. The hollow frame is fixed on the outer wall of one side of the support platform.

4. The offshore wind power generation device according to claim 3, characterized in that: A return spring is fixed to the bottom end of the Y-shaped connector. The return spring and the piston rod of the hydraulic cylinder are fitted together, and the bottom end of the return spring is fixedly connected to the top end of the hydraulic cylinder body.

5. A method for generating offshore wind power, comprising the offshore wind power generation device as described in any one of claims 1-4, characterized in that: Includes the following steps: S101: When the wind speed is too high, the power grid demand is reduced, or the machine needs to be stopped and slowed down, the electric three-channel hydraulic distribution assembly synchronously supplies hydraulic oil to the dual-position caliper brake assembly and the hydraulic caliper positioning auxiliary brake assembly. The oil circuit of the electric three-channel hydraulic distribution assembly is designed to provide primary braking at the dual-position caliper brake assembly and secondary braking at the hydraulic caliper positioning auxiliary brake assembly, respectively. S102: The symmetrically distributed caliper arms of the dual-position caliper brake assembly clamp the perforated brake disc on the vertical spindle under hydraulic drive. The kinetic energy of the vertical spindle rotation is converted into heat energy dissipation through friction, and the speed of the vertical spindle is gradually reduced. S103: The hydraulic caliper type alignment auxiliary brake assembly serves as a secondary braking component. It cooperates with the steel sleeve surrounding the outside of the vertical main shaft. The hydraulic caliper type alignment auxiliary brake assembly retracts radially under the drive of hydraulic oil and fits tightly against the surface of the steel sleeve, generating continuous frictional resistance along the axial direction of the vertical main shaft. This extends the braking force range from the local area of ​​the perforated brake disc to the extension direction of the vertical main shaft. S104: After the braking action of the generator set and the vertical spindle is completed, the electric three-channel hydraulic distribution assembly resets and the oil flows back. Then, the dual-position caliper brake assembly and the hydraulic caliper positioning auxiliary brake assembly stop the braking action. The vertical spindle continues to rotate driven by the wind vane and the sea breeze. The rotation of the vertical spindle directly drives the magnetic field change in the generator set, inducing alternating current in the stator winding. The alternating current is processed by the rectifier and inverter connected to the generator set into power output that meets the grid standards. After rectification and regulation, the output is stable power and supplied to the offshore power grid or energy storage equipment.

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