Offshore vertical-axis wind power generation equipment

Abstract

The invention belongs to the technical field of wind power generation equipment, and particularly relates to offshore vertical axis wind power generation equipment. The device is mainly composed of a lifting shaft, a hydraulic driving system, a blade connecting rod assembly and a clamping assembly. And through cooperative operation of the components, multiple advantages of the equipment are realized. The lifting shaft, the hydraulic driving system and the blade connecting rod assembly are matched, the equipment diameter can be adjusted in real time according to the wind speed, the diameter is increased at low wind speed to capture more wind energy, the diameter is reduced at high wind speed to guarantee equipment stability, and the power generation efficiency is improved. The clamping assembly is ingenious in design, the hollow main shaft can be automatically clamped when the sealing ring is maintained, the piston is suspended and supported, the maintenance time is shortened, and the maintenance cost is reduced. In addition, the roller at the lower end of the first rotating arm reduces abrasion, and the service life of equipment is prolonged by combining sealing design. The invention provides an innovative solution for the offshore wind power generation industry and assists the development of clean energy.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation equipment technology, specifically relating to an offshore vertical axis wind power generation device. Background Technology

[0002] In offshore wind power generation, significant fluctuations in wind speed pose severe challenges to the performance and stability of power generation equipment. Traditional wind turbines have fixed blade sizes and layouts, making real-time adjustments impossible based on wind speed changes. This results in low efficiency at low wind speeds due to ineffective wind energy capture, while at high wind speeds, the equipment may be damaged by excessive wind impact, compromising operational safety. Furthermore, wind characteristics vary considerably across different sea areas, making single-structure power generation equipment ill-suited to the complex and ever-changing offshore conditions. Developing flexible, variable-diameter wind turbines that maintain good power generation performance under varying wind intensities has become a critical technical challenge urgently needing to be addressed in the offshore wind power industry.

[0003] The methods described in this section are not necessarily methods that had been previously conceived or adopted. Unless otherwise specified, no method described in this section should be assumed to be prior art simply because it is included in this section. Similarly, unless otherwise specified, the issues mentioned in this section should not be considered to be accepted in any prior art. Summary of the Invention

[0004] This invention aims to provide an offshore vertical axis wind power generation device. Through the coordinated operation of the lifting shaft, hydraulic drive system, and blade connecting rod assembly, the device achieves variable diameter operation, thereby adapting to different wind intensities and improving power generation efficiency. Simultaneously, with the aid of a clamping assembly, the piston can be automatically clamped on the outside of the hollow main shaft during seal maintenance, reducing the support operations required by maintenance personnel and improving seal replacement efficiency.

[0005] To achieve the above objectives, one technical solution adopted by the present invention is: A vertical axis offshore wind power generation device includes a lifting shaft, a hydraulic drive system, and a blade connecting rod assembly. The lifting shaft includes a hollow main shaft and a piston. The lower part of the hollow main shaft is drivenly connected to the input end of a generator. The piston is slidably and sealed within the hollow main shaft. The hydraulic drive system is connected to the lower end of the hollow main shaft to control the lifting and lowering of the piston by adjusting the oil pressure within the hollow main shaft. Multiple sets of blade connecting rod assemblies are installed on the side of the lifting shaft. Each blade connecting rod assembly includes an upper connecting rod, a lower connecting rod, and a wind turbine blade. One end of the upper connecting rod is hinged to the piston, and the other end is hinged to the wind turbine blade. One end of the lower connecting rod is hinged to the hollow main shaft, and the other end is hinged to the wind turbine blade. The hinge axes of the upper and lower connecting rods and the wind turbine blade are not concentric.

[0006] Furthermore, a sealing ring is fitted to the outside of the piston.

[0007] Furthermore, it also includes a clamping assembly, which includes a clamping member, a sliding member, and an elastic member. There are two clamping members, which are symmetrically arranged on opposite sides of the piston side. Each clamping member includes a first rotating arm, a second rotating arm, and a clamping block. The upper end of the first rotating arm is fixed to the upper end of the second rotating arm and hinged to the piston. The piston is a hollow structure. Each opposite side of the piston has a relief groove corresponding to the first rotating arm. The relief groove is located above the sealing ring. The lower end of the first rotating arm extends into the piston through the relief groove on the same side and can rotate out through the relief groove on the opposite side. The clamping member is connected to the lower end of the second rotating arm and is located outside the piston. The distance between the hinge point of the second rotating arm and the upper end of the clamping member is greater than the distance between the hinge point of the second rotating arm and the lower end of the piston. The first rotating arm has a first sliding groove extending along its length. The sliding member passes through the first sliding groove of the two first rotating arms and is longitudinally slidably connected to the piston. The elastic member is disposed inside the piston to drive the sliding member to slide upward.

[0008] Furthermore, the piston has an opening at its upper end and is detachably connected to a cap. The elastic element is connected between the cap and the sliding element, and the elastic element can elastically tighten to pull the sliding element upward.

[0009] Furthermore, the sliding member includes a first crossbar and two sliders. The two sliders are respectively fixed to the front and rear ends of the first crossbar. The first crossbar passes through the two first sliding grooves. The piston inner wall has two upwardly penetrating second sliding grooves on both the front and rear sides. The two sliders are respectively longitudinally slidably assembled in the two second sliding grooves.

[0010] Furthermore, the cap includes a cover plate and an annular cylinder. The annular cylinder is fixed to the lower end of the cover plate. When the cap is assembled on the piston, the annular cylinder will be inserted into the piston, and the cover plate will abut against the upper end of the piston.

[0011] Furthermore, the lower end of the ring cylinder has two lower crossbars extending downwards and fixedly connected to both the front and rear sides, and the elastic element is assembled between the second crossbar and the first crossbar.

[0012] Furthermore, there are two elastic elements, which are respectively assembled on the front and rear sides of the two first rotating arms.

[0013] Furthermore, the clamping member has a V-shaped groove on the side near the hollow spindle, and an anti-slip pad is fitted inside the V-shaped groove.

[0014] Furthermore, the hydraulic drive system includes a rotary joint, an oil pipe, and an oil regulator. One end of the oil pipe is connected to the lower end of the hollow spindle through the rotary joint, and the other end is connected to the oil regulator, which is used to adjust the amount of oil in the hollow spindle.

[0015] The offshore vertical axis wind power generation equipment provided by this invention exhibits significant beneficial effects in multiple dimensions: Exceptional power generation efficiency: The coordinated operation of the lifting shaft, hydraulic drive system, and blade linkage assembly allows the equipment to flexibly adjust its diameter according to real-time wind speed. In low-wind-speed environments, the increased diameter effectively enhances the wind energy capture area, significantly improving power generation efficiency; in high-wind-speed environments, the decreased diameter reduces the windward area, ensuring stable operation and preventing damage from strong winds. This broadens the equipment's applicable wind speed range and greatly enhances power generation efficiency.

[0016] Convenient maintenance experience: The clamping component is cleverly designed. When maintaining the sealing ring, as the piston extends upwards through the hollow main shaft, the clamping component can automatically clamp the hollow main shaft, achieving suspension support for the piston. This reduces the need for additional support operations by maintenance personnel, lowers labor intensity, effectively shortens maintenance time, reduces maintenance costs, and significantly improves the convenience of equipment maintenance.

[0017] Excellent durability: The rollers rotatably connected to the lower end of the first rotating arm significantly reduce frictional loss between the first rotating arm and the inner wall of the hollow main shaft, minimizing component wear and extending the overall service life of the equipment. Furthermore, the sealing design of the sealing ring and piston effectively prevents oil leakage from the hollow main shaft, ensuring stable operation of the hydraulic drive system and further guaranteeing the long-term stable use of the equipment.

[0018] Significant industry value: This invention provides an innovative technical solution for the offshore wind power generation field, improves the performance and reliability of offshore wind power generation equipment, helps promote the continuous development of the offshore wind power generation industry towards high efficiency, safety and stability, and is of great significance to promoting the widespread application of clean energy. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of an embodiment of an offshore vertical axis wind power generation device according to the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3This is a schematic cross-sectional view of the piston in one embodiment of an offshore vertical axis wind power generation device according to the present invention. Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 for Figure 3 A magnified schematic diagram of the structure at point C.

[0020] The meanings of the labels in the attached diagram are as follows: Lifting shaft 1, hollow main shaft 11, piston 12, sealing ring 121, clearance groove 122, cover 123, cover plate 1231, ring cylinder 1232, second crossbar 1233, second slide groove 124, blade connecting rod assembly 2, upper connecting rod 31, lower connecting rod 32, wind turbine blade 33, clamping assembly 4, clamping part 41, first rotating arm 411, first slide groove 4111, second rotating arm 412, clamping block 413, anti-slip pad 4131, sliding part 42, first crossbar 421, slider 422, elastic part 43. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Reference Figures 1-5 As shown, the offshore vertical axis wind power generation equipment of this embodiment includes a lifting shaft, a hydraulic drive system, a blade connecting rod assembly, and a clamping assembly.

[0023] The lifting shaft 1 plays a crucial role in support and transmission, and includes a hollow main shaft 11 and a piston 12. The lower part of the hollow main shaft 11 is connected to the generator input end via gear transmission, which is common. Gears meshing with each other are installed on the lower outer side of the hollow main shaft 11 and the generator input end. When the hollow main shaft 11 rotates, it drives the meshing gears to rotate, thereby transferring wind energy to the generator. Through this connection, the wind energy captured by the wind turbine blades 33 can be transferred to the generator via the lifting shaft 1 and converted into electrical energy. The piston 12 is sealed and slidably connected inside the hollow main shaft 11. The sealing ring 121 mounted on the outer side of the piston 12 effectively prevents oil leakage inside the hollow main shaft 11, ensuring the stable operation of the hydraulic drive system.

[0024] The hydraulic drive system, connected to the lower end of the hollow spindle 11, is the core component controlling the lifting and lowering of the piston 12. It includes a rotary joint, oil pipes, and an oil regulator. One end of the oil pipe is connected to the lower end of the hollow spindle 11 via the rotary joint; this design ensures the stability of the oil pipe connection during the rotation of the hollow spindle 11, preventing entanglement. The other end of the oil pipe is connected to the oil regulator, which adjusts the oil volume within the hollow spindle 11 to change the oil pressure. When the oil volume increases, the pressure rises, pushing the piston 12 upward; conversely, the piston 12 descends, thus achieving precise control over the lifting and lowering of the piston 12.

[0025] Multiple blade connecting rod assemblies 3 are installed on the side of the lifting shaft 1. These assemblies cooperate with each other to achieve changes in the equipment diameter and realize efficient wind energy capture. Each blade connecting rod assembly 3 includes an upper connecting rod 31, a lower connecting rod 32, and a wind turbine blade 33. One end of the upper connecting rod 31 is hinged to the piston 12, and the other end is hinged to the wind turbine blade 33. One end of the lower connecting rod 32 is hinged to the hollow main shaft 11, and the other end is hinged to the wind turbine blade 33. The hinge axes of the upper connecting rod 31 and the lower connecting rod 32 are not concentric with those of the wind turbine blade 33. This special hinge method allows the upper connecting rod 31 and the lower connecting rod 32 to drive the wind turbine blade 33 to move relative to each other around different hinge points when the piston 12 rises and falls, thereby opening or closing the wind turbine blade 33 outwards and changing the equipment diameter.

[0026] The clamping assembly 4 is designed to facilitate the maintenance of components such as the sealing ring 121. It includes a clamping member 41, a sliding member 42, and an elastic member 43. There are two clamping members 41, symmetrically arranged on opposite sides of the piston 12. Each clamping member 41 includes a first rotating arm 411, a second rotating arm 412, and a clamping block 413. The upper ends of the first rotating arm 411 and the second rotating arm 412 are fixed and hinged to the piston 12. The piston 12 has a hollow structure, and relief grooves 122 corresponding to the first rotating arm 411 are opened on opposite sides. The relief grooves 122 are located above the sealing ring 121. The lower end of the first rotating arm 411 can extend into the piston 12 through the relief groove 122 on the same side and rotate out through the relief groove 122 on the opposite side.

[0027] The clamping member 41 is connected to the lower end of the second rotating arm 412 and located outside the piston 12. The distance between the hinge point of the second rotating arm 412 and the upper end of the clamping member 41 is greater than the distance between the hinge point of the second rotating arm 412 and the lower end of the piston 12. This structural design allows the clamping member 41 to generate an effective clamping action under certain conditions. The first rotating arm 411 has a first sliding groove 4111 extending along its length. The sliding member 42 passes through the first sliding groove 4111 of the two first rotating arms 411 and is longitudinally slidably connected to the piston 12, so that the sliding member 42 can move within the first sliding groove 4111, driving the first rotating arm 411 to rotate. The elastic member 43 is provided inside the piston 12 and is used to drive the sliding member 42 to slide upward.

[0028] The piston 12 has an opening at its upper end and is detachably connected to a cover 123. An elastic element 43 is connected between the cover 123 and the sliding element 42, and the sliding element 42 is pulled upward by elastic tightening. The sliding element 42 includes a first crossbar 421 and two sliders 422, which are respectively fixed to the front and rear ends of the first crossbar 421. The first crossbar 421 passes through two first sliding grooves 4111. The piston 12 has two upwardly penetrating second sliding grooves 124 on both the front and rear sides of its inner wall. The two sliders 422 are respectively longitudinally slidably assembled in the two second sliding grooves 124 to ensure that the sliding element 42 slides smoothly within the piston 12.

[0029] The cover 123 includes a cover plate 1231 and an annular cylinder 1232, with the annular cylinder 1232 fixedly connected to the lower end of the cover plate 1231. When the cover 123 is assembled onto the piston 12, the annular cylinder 1232 is inserted into the piston 12, and the cover plate 1231 abuts against the upper end of the piston 12, thus sealing the upper end of the piston 12. The lower end of the annular cylinder 1232 extends downwards on both its front and rear sides and is fixedly connected to a second crossbar 1233. An elastic element 43 is assembled between the second crossbar 1233 and the first crossbar 421. There are two elastic elements 43, respectively assembled on the front and rear sides of the two first rotating arms 411, providing stable elastic force to the sliding element 42 and simultaneously applying a downward pulling force to the cover 123, ensuring a tight seal with the piston 12, thereby forming a fixed structure. The clamping member 41 has a V-shaped clamping groove on the side near the hollow spindle 11, with an anti-slip pad 4131 installed inside the V-shaped clamping groove to increase friction during clamping and enhance clamping stability.

[0030] Variable Diameter Principle: When the oil regulator increases the amount of oil in the hollow main shaft 11, the oil pressure increases, pushing the piston 12 upward. As the piston 12 moves upward, it drives the upper end of the upper connecting rod 31 upward. Since one end of the lower connecting rod 32 is hinged to the hollow main shaft 11, the wind turbine blades 33 contract inward under the influence of the upper and lower connecting rods, reducing the equipment diameter to adapt to high wind speed environments, ensuring stable equipment operation, and preventing damage due to excessive windward area. Conversely, when the oil regulator reduces the amount of oil in the hollow main shaft 11, the piston 12 moves downward, the wind turbine blades 33 open outward, and the equipment diameter increases to adapt to low wind speed environments, capturing more wind energy and improving power generation efficiency.

[0031] Working principle of the clamping assembly: When the piston 12 is assembled inside the hollow spindle 11, the elastic element 43 drives the sliding element 42 to slide upward, causing the lower ends of the two first rotating arms 411 to pass through the relief grooves 122 on opposite sides under the action of elastic force and abut against the inner wall of the hollow spindle 11 in an X-shaped staggered state. In this state, the piston 12 can slide normally up and down inside the hollow spindle 11, and the hydraulic drive system's control over the lifting and lowering of the piston 12 is not affected. At the same time, the two second rotating arms 412 are in an outward-folded state, maintaining a certain gap with the hollow spindle 11, and will not contact the hollow spindle 11, thus avoiding interference with the sliding of the piston 12. It is worth mentioning that in this embodiment, a roller is also rotatably connected to the lower end of the first rotating arm 411 to reduce wear between the first rotating arm 411 and the inner wall of the hollow spindle 11.

[0032] When maintenance of the sealing ring 121 is required, the piston 12 is slid upwards via the hydraulic drive system. After the lower end of the first rotating arm 411 slides upwards to extend beyond the hollow main shaft 11, the first rotating arm 411 extends beyond the opposite relief groove 122 under the action of elastic force. At this time, the second rotating arms 412 of the two clamping members 41 flip to the opposite side, and the V-shaped clamping groove of the clamping block 413 clamps the hollow main shaft 11, realizing the automatic clamping of the piston 12 outside the hollow main shaft 11, suspending and supporting the piston 12, which facilitates maintenance personnel to replace the sealing ring 121.

[0033] It is worth mentioning that the sealing ring 121 is located below the relief groove 122, and the distance between the hinge point of the second rotating arm 412 and the upper end of the clamping member 41 is greater than the distance between the hinge point of the second rotating arm 412 and the lower end of the piston 12. Based on this structural design, before the piston 12 is completely disengaged from the hollow spindle 11, the two clamping members 41 have already completed the clamping action on the hollow spindle 11, avoiding the piston 12 being in an unsupported state during this process, which greatly improves the safety and convenience of maintenance operations.

[0034] In summary, this invention discloses an offshore vertical axis wind power generation device. Through the ingenious coordination of multiple components, this device effectively solves the adaptability challenges of power generation equipment in complex offshore wind environments. The cooperation between the lifting shaft, hydraulic drive system, and blade connecting rod assembly enables flexible adjustment of the device diameter, broadening the applicable wind speed range and significantly improving power generation efficiency and stability. The innovative design of the clamping assembly not only reduces the support operations required by maintenance personnel when replacing seals, but its clamping feature, which completes clamping before the piston disengages from the hollow main shaft, also greatly enhances the safety of maintenance operations. This device balances power generation efficiency and ease of maintenance, bringing a new technological solution to the offshore wind power generation field and is expected to drive the industry towards continuous development towards high efficiency, safety, and stability.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An offshore vertical axis wind power generation device, characterized in that: The device includes a lifting shaft, a hydraulic drive system, and a blade connecting rod assembly. The lifting shaft includes a hollow main shaft and a piston. The lower part of the hollow main shaft is connected to the input end of a generator. The piston is slidably and sealed within the hollow main shaft. The hydraulic drive system is connected to the lower end of the hollow main shaft to control the lifting and lowering of the piston by adjusting the oil pressure within the hollow main shaft. Multiple sets of blade connecting rod assemblies are installed on the side of the lifting shaft. Each blade connecting rod assembly includes an upper connecting rod, a lower connecting rod, and a wind turbine blade. One end of the upper connecting rod is hinged to the piston, and the other end is hinged to the wind turbine blade. One end of the lower connecting rod is hinged to the hollow main shaft, and the other end is hinged to the wind turbine blade. The hinge axes of the upper and lower connecting rods and the wind turbine blade are not concentric.

2. The offshore vertical axis wind power generation equipment according to claim 1, characterized in that: A sealing ring is fitted on the outside of the piston.

3. The offshore vertical axis wind power generation equipment according to claim 2, characterized in that: It also includes a clamping assembly, which includes a clamping member, a sliding member, and an elastic member. There are two clamping members, which are symmetrically arranged on opposite sides of the piston. Each clamping member includes a first rotating arm, a second rotating arm, and a clamping block. The upper end of the first rotating arm is fixed to the upper end of the second rotating arm and is hinged to the piston. The piston is a hollow structure. Each opposite side of the piston has a relief groove corresponding to the first rotating arm. The relief groove is located above the sealing ring. The lower end of the first rotating arm extends into the piston through the relief groove on the same side and can rotate out through the relief groove on the opposite side. The clamping member is connected to the lower end of the second rotating arm and is located outside the piston. The distance between the hinge point of the second rotating arm and the upper end of the clamping member is greater than the distance between the hinge point of the second rotating arm and the lower end of the piston. The first rotating arm has a first sliding groove extending along its length. The sliding member passes through the first sliding groove of the two first rotating arms and is longitudinally slidably connected to the piston. The elastic member is disposed inside the piston to drive the sliding member to slide upward.

4. The offshore vertical axis wind power generation equipment according to claim 3, characterized in that: The piston has an opening at its upper end and is detachably connected to a cover. The elastic element is connected between the cover and the sliding element. The elastic element tightens elastically to pull the sliding element upward.

5. The offshore vertical axis wind power generation equipment according to claim 4, characterized in that: The sliding component includes a first crossbar and two sliders. The two sliders are respectively fixed to the front and rear ends of the first crossbar. The first crossbar passes through the two first sliding grooves. The piston inner wall has two upwardly penetrating second sliding grooves on both the front and rear sides. The two sliders are respectively longitudinally slidably assembled in the two second sliding grooves.

6. The offshore vertical axis wind power generation equipment according to claim 5, characterized in that: The cap includes a cover plate and an annular cylinder. The annular cylinder is fixed to the lower end of the cover plate. When the cap is assembled on the piston, the annular cylinder will be inserted into the piston, and the cover plate will abut against the upper end of the piston.

7. The offshore vertical axis wind power generation equipment according to claim 6, characterized in that: The lower end of the ring cylinder has two downward-extending and fixed second crossbars on both the front and rear sides. The elastic element is assembled between the second crossbar and the first crossbar.

8. The offshore vertical axis wind power generation equipment according to claim 7, characterized in that: The elastic element is two in number, and the two elastic elements are respectively assembled on the front and rear sides of the two first rotating arms.

9. The offshore vertical axis wind power generation equipment according to claim 3, characterized in that: The clamping member has a V-shaped groove on the side near the hollow spindle, and an anti-slip pad is fitted inside the V-shaped groove.

10. The offshore vertical axis wind power generation equipment according to claim 1, characterized in that: The hydraulic drive system includes a rotary joint, an oil pipe, and an oil regulator. One end of the oil pipe is connected to the lower end of the hollow spindle through the rotary joint, and the other end is connected to the oil regulator, which is used to adjust the amount of oil in the hollow spindle.

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