Offshore wind power system energy storage device and operation method

Abstract

The invention relates to the technical field of offshore wind power energy storage, and provides an offshore wind power system energy storage device and an operation method.The offshore wind power system energy storage device comprises a power generation platform, a power generation mechanism, a buoyancy adjusting mechanism and a driving mechanism, the power generation mechanism is arranged in the center of the power generation platform, and the power generation mechanism is used for generating power through wind power and converting stored buoyancy into electric energy for power generation; the buoyancy adjusting mechanism is arranged below the power generation platform and used for converting and storing redundant wind energy and buoyancy, the driving mechanism is in transmission connection with the power generation mechanism, and the driving mechanism is used for enabling the power generation mechanism to drive the buoyancy adjusting mechanism to move. A transmission channel is arranged on the side, away from the power generation mechanism, of the power generation platform, and the driving mechanism and the buoyancy adjusting mechanism are assembled and installed through the transmission channel. According to the technical scheme, redundant energy can be directly converted into buoyancy during normal power generation, and use of redundant devices and energy loss are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power energy storage, and particularly to an energy storage device and an operation method for an offshore wind power system. Background Art

[0002] Like onshore wind power, offshore wind power has volatility, intermittency and irregularity, resulting in a lot of wasted energy. Therefore, energy storage is required for offshore wind power.

[0003] Traditional offshore energy storage mostly uses the same electrochemical energy storage technology as on land, such as lithium-ion batteries. Through the batteries, energy can be stored and released quickly and efficiently. In this way, battery energy storage devices need to be configured for each wind turbine. This energy storage method improves the regulation speed and response accuracy of the wind farm. However, the production and maintenance costs of battery energy storage devices are relatively high, and their service life is limited. In the offshore area, the buoyancy of seawater can be utilized for energy storage, which saves the cost of batteries and reduces the failure rate. The patent with the application number CN202110756986.5 discloses a buoyancy and gravity composite offshore wind power energy storage device. When storing energy, the buoyancy adjustment mechanism is controlled to rise in water, and when releasing energy, the buoyancy adjustment mechanism moves downward under the action of gravity, driving the rotating paddle to rotate through contact with seawater and then generating electricity. However, this method has high requirements for the depth of the water area. At the same time, there are multiple devices such as a power generation component and an energy conversion mechanism arranged on the buoyancy adjustment mechanism. There is an electric wire connected between the buoyancy adjustment mechanism and the wind turbine. When in use, the buoyancy adjustment mechanism is likely to float in the water, pulling on the wind turbine and prone to collision and failure. Therefore, in order to minimize the equipment in water during energy storage and thus reduce the failure rate during energy storage, an energy storage device for an offshore wind power system needs to be proposed. Summary of the Invention

[0004] Aiming at the defects existing in the prior art, the present invention provides an energy storage device and an operation method for an offshore wind power system, which solves the problem that there are too many devices moving in water in the prior art energy storage method using buoyancy and gravity, and it is easy to have failures.

[0005] The technical solution adopted by the present invention is as follows:

[0006] The present invention provides an energy storage device for an offshore wind power system, including:

[0007] A power generation platform;

[0008] A power generation mechanism, which is arranged in the center of the power generation platform and is used for generating electricity by wind power and converting the stored buoyancy into electric energy for power generation;

[0009] A buoyancy adjustment mechanism, which is arranged below the power generation platform and is used to convert and store excess wind energy and buoyancy;

[0010] A driving mechanism, which is arranged on the power generation platform, is in transmission connection with the power generation mechanism, and is in transmission connection with the buoyancy adjustment mechanism. The driving mechanism is used to transmit and connect the power generation mechanism and the buoyancy adjustment mechanism;

[0011] Wherein, a transmission channel is arranged on one side of the power generation platform away from the power generation mechanism, and both the driving mechanism and the buoyancy adjustment mechanism are assembled and installed through the transmission channel.

[0012] Preferably, the power generation mechanism includes:

[0013] A column, which is fixedly arranged in the center of the power generation platform, and the center of the column is hollow;

[0014] A unit housing, which is fixedly arranged on the top of the column;

[0015] Blades, which are rotatably arranged outside the unit housing;

[0016] A clutch, which is fixedly arranged inside the unit housing, is in transmission connection with the blades, and is in transmission connection with one end of the driving mechanism;

[0017] A generator, which is fixedly arranged inside the unit housing and is in transmission connection with the clutch.

[0018] Preferably, the clutch is provided with a first transmission shaft, a second transmission shaft and a third transmission shaft; the first transmission shaft is connected to the blades, the second transmission shaft is connected to the generator, and the third transmission shaft is in transmission connection with one end of the driving mechanism;

[0019] The first transmission shaft, the second transmission shaft and the third transmission shaft are all transmitted through the gear devices that cooperate inside the clutch; by adjusting the gear devices inside the clutch, the mutual transmission between the first transmission shaft, the second transmission shaft and the third transmission shaft can be controlled; the clutch can adjust the first transmission shaft to drive the second transmission shaft to rotate for the wind power generation working condition; the clutch can adjust the first transmission shaft to drive the third transmission shaft to rotate for the energy storage working condition of converting wind energy into buoyancy; the clutch can adjust the third transmission shaft to drive the second transmission shaft to rotate for the energy release working condition.

[0020] Preferably, the driving mechanism includes:

[0021] Linkage assembly, the linkage assembly is drivingly connected to the clutch, the linkage assembly passes through the column and extends into the transmission channel, a gear set is connected to one end of the linkage assembly extending into the transmission channel, and the linkage assembly is used to drive the gear set to move;

[0022] First transmission frame, the first transmission frame is fixedly arranged in the transmission channel, and the first transmission frame is sleeved on the linkage assembly;

[0023] The gear set, the gear set is sleeved on the first transmission frame, and the gear set is used to drive the buoyancy adjustment mechanism to move under the action of the linkage assembly;

[0024] Second transmission frame, the second transmission frame is fixedly arranged in the transmission channel, and the second transmission frame is sleeved on the outside of the gear set;

[0025] Through the linkage assembly, the rotation of the paddle is transmitted to the gear set, and the gear set then transmits the kinetic energy to the buoyancy adjustment mechanism to perform the energy storage condition of converting wind energy into buoyancy; and when the buoyancy adjustment mechanism moves upward, it drives the gear set to rotate, and the gear set then drives the clutch to act through the linkage assembly, and then makes the generator generate electricity to perform the energy release condition.

[0026] Preferably, the linkage assembly includes:

[0027] Linkage frame, the linkage frame is fixedly arranged in the column;

[0028] First transmission wheel, the first transmission wheel is rotatably arranged in the linkage frame, and the first transmission wheel is connected to the third transmission shaft;

[0029] Second transmission wheel, the second transmission wheel is rotatably arranged in the linkage frame, the first transmission wheel is drivingly connected to the second transmission wheel, a driving rod is arranged on the second transmission wheel, and the driving rod penetrates through the linkage frame and the first transmission frame;

[0030] A transmission member is sleeved between the first transmission wheel and the second transmission wheel; when the third transmission shaft drives the first transmission wheel to rotate, the second transmission wheel is driven to rotate through the transmission member; when the second transmission wheel rotates, the driving rod is driven to rotate.

[0031] Preferably, a plurality of transmission rods are rotatably arranged on the first transmission frame, and the transmission rods penetrate through the second transmission frame; one of the transmission rods is connected to the driving rod; when the driving rod rotates, one of the transmission rods is driven to rotate.

[0032] Preferably, the gear set includes:

[0033] Bevel gears, with a plurality of the bevel gears provided, and each of the bevel gears is provided at one end of each of the transmission rods;

[0034] Tooth rings, with two of the tooth rings provided, and the two tooth rings are provided on the upper and lower sides of the plurality of bevel gears. The tooth rings are rotatably provided on the first transmission frame, and all of the plurality of bevel gears are meshed with the two tooth rings;

[0035] When the drive rod rotates, it drives one of the transmission rods connected thereto to rotate. When the transmission rod rotates, it drives the bevel gear at its end to rotate, thereby driving the two tooth rings to rotate on the first transmission frame; when the two tooth rings rotate, they drive all the other bevel gears to rotate simultaneously, thereby driving all the other transmission rods to rotate, thus achieving the rotation of all the transmission rods at the same speed.

[0036] Preferably, the buoyancy adjustment mechanism includes:

[0037] Deep-water frames, with a plurality of the deep-water frames provided, and the deep-water frames correspond to the transmission rods one by one. The deep-water frames are fixedly provided in the transmission channels, and one end of the transmission rod extends into the deep-water frame;

[0038] Drive wheels, rotatably provided in the deep-water frames, and a transmission chain is tension-sleeved between the drive wheels and one end of the transmission rod;

[0039] Buoyancy components, provided on the transmission chain, and the buoyancy components are used for lifting and storing energy in seawater;

[0040] When the transmission rod rotates, it drives the transmission chain to move with the drive wheel as a support; when the transmission chain moves, it drives the buoyancy components to move up and down;

[0041] The buoyancy components include:

[0042] Passage grooves, opened on the sides of the deep-water frames;

[0043] Link rods, fixedly provided on each of the transmission chains, and the link rods pass through the passage grooves;

[0044] Moving frames, provided on the link rods and fixedly connected to each of the link rods; the moving frames are sleeved outside the plurality of deep-water frames;

[0045] Floats, with a plurality of the floats provided, and the plurality of floats are provided on the moving frames;

[0046] When each of the transmission rods rotates simultaneously, supported by the corresponding drive wheels, the corresponding transmission chains are driven to move, thereby driving the connecting rods to move up and down along the through slots on the sides of the deep water frame; when all the connecting rods move up and down, the moving frame is driven to move up and down; since the deep water frame extends into the water and the moving frame surrounds the deep water frame, the moving frame can move up and down within the range where the deep water frame extends into the water.

[0047] The present invention also provides an operation method for an energy storage device of an offshore wind power system, including the following steps:

[0048] Step S1, by adjusting the clutch, enabling the energy storage device of the offshore wind power system to perform the wind power generation condition of step S2, the energy storage condition of converting wind energy into buoyancy of step S3, and the energy release condition of step S4 as required;

[0049] Step S2, wind power generation condition:

[0050] In the wind power generation condition, the clutch is adjusted to enable the transmission between the first transmission shaft and the second transmission shaft, disconnect the transmission between the third transmission shaft and the first transmission shaft, and disconnect the transmission between the third transmission shaft and the second transmission shaft;

[0051] The blades rotate under the action of wind. When the blades rotate, through the transmission between the first transmission shaft and the second transmission shaft of the clutch, the generator is driven to generate electricity;

[0052] Step S3, energy storage condition of converting wind energy into buoyancy:

[0053] In the energy storage condition of converting wind energy into buoyancy, the clutch is adjusted to enable the transmission between the first transmission shaft and the third transmission shaft, disconnect the transmission between the third transmission shaft and the second transmission shaft, and the transmission between the first transmission shaft and the second transmission shaft can be engaged or disengaged;

[0054] The blades rotate under the action of wind. When the blades rotate, through the transmission between the first transmission shaft and the third transmission shaft of the clutch, the first transmission shaft is driven to rotate, and then the third transmission shaft is driven to rotate;

[0055] When the third transmission shaft rotates, the moving frame in the buoyancy adjustment mechanism is driven by the drive mechanism to stably descend, and then the float moves into the water, converting wind energy into buoyancy to perform the energy storage condition of converting wind energy into buoyancy;

[0056] Step S4, energy release condition:

[0057] In the energy release condition, the clutch is adjusted to enable the transmission between the third transmission shaft and the second transmission shaft, disconnect the transmission between the first transmission shaft and the third transmission shaft; the transmission between the first transmission shaft and the second transmission shaft can be engaged or disengaged;

[0058] Under the action of buoyancy, the floating buoy moves upward, thereby driving the movement frame upward. When the movement frame moves upward, it drives the third transmission shaft to rotate through the driving mechanism. The third transmission shaft drives the second transmission shaft to rotate, and then drives the generator 7 to generate electricity, completing the energy release.

[0059] Preferably, during the energy storage condition of converting wind energy into buoyancy, when the third transmission shaft rotates, it drives the movement frame in the buoyancy adjustment mechanism to stably descend through the driving mechanism. Specifically:

[0060] When the third transmission shaft rotates, it drives the first transmission wheel to rotate. The first transmission wheel drives the second transmission wheel to rotate through the transmission component. When the second transmission wheel rotates, it drives the connected driving rod to rotate.

[0061] When the driving rod rotates, it drives one of the transmission rods connected to it to rotate.

[0062] When the transmission rod rotates, it drives the bevel gear at its end to rotate, and then drives the two toothed rings to rotate on the first transmission frame. When the two toothed rings rotate, they drive all the other bevel gears to rotate simultaneously, and then drive all the other transmission rods to rotate, thereby realizing the uniform rotation of all the transmission rods.

[0063] When all the transmission rods rotate uniformly, they drive each transmission chain to move with the driving wheel as the support. When the transmission chain moves, it drives the connecting rod to descend in the through groove, and all the connecting rods drive the movement frame to stably descend.

[0064] During the energy release condition, when the movement frame moves upward, it drives the third transmission shaft to rotate through the driving mechanism. Specifically:

[0065] When the movement frame moves upward, it drives the connecting rod to move upward in the through groove. When each connecting rod moves upward, it drags the transmission chain to move. The movement of the transmission chain drives the transmission rod to rotate. The transmission rod then drives the driving rod to rotate through the meshing of the bevel gear and the toothed ring. The driving rod drives the second transmission wheel to rotate. The second transmission wheel drives the first transmission wheel to rotate through the transmission component, and then drives the third transmission shaft to rotate.

[0066] The energy storage device and operation method of the offshore wind power system provided by the present invention have the following advantages:

[0067] 1. In the present invention, by setting a clutch, the adjusting blade directly drives the generator to generate electricity through the clutch, or the blade drives the movement frame to dive into the water, directly converting wind energy into the buoyancy of the floating buoy, reducing the link of converting wind energy into electrical energy and then converting electrical energy into buoyancy and gravitational potential energy for energy storage, reducing the use of some underwater equipment, and thus reducing the failure rate and cost.

[0068] 2. In the present invention, by providing a power generation mechanism, while generating electricity normally, the excess energy can be directly converted into buoyancy, reducing the use of redundant devices and energy loss. By providing a buoyancy adjustment mechanism, energy can be stored simply by ascending and descending in water. By providing a drive mechanism, the kinetic energy of the rotating paddle blades can be evenly transmitted to the moving frame, enabling the moving frame to maintain balance during both ascending and descending. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0070] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0071] Figure 2 is a schematic structural diagram of another perspective of the whole of the present invention;

[0072] Figure 3 is a schematic diagram of the internal partial sectional structure of the column and the unit housing in the present invention

[0073] Figure 4 is a schematic diagram of another perspective of the internal partial sectional structure of the column and the unit housing in the present invention;

[0074] Figure 5 is a schematic diagram of the internal partial sectional structure of the transmission channel and the deep - water frame in the present invention;

[0075] Figure 6 is a schematic diagram of the internal sectional structure of the transmission channel in the present invention;

[0076] Figure 7 is a schematic diagram of another perspective of the internal sectional structure of the transmission channel in the present invention;

[0077] Figure 8 is a schematic diagram of the internal sectional structure of the transmission channel and the column in the present invention.

[0078] In the figures: 1, power generation platform; 2, transmission channel; 3, column; 4, unit housing; 5, paddle blade; 6, clutch; 7, generator; 8, first transmission shaft; 9, second transmission shaft; 10, third transmission shaft; 11, first transmission frame; 12, second transmission frame; 13, linkage frame; 14, first transmission wheel; 15, second transmission wheel; 16, drive rod; 17, transmission rod; 18, bevel gear; 19, toothed ring; 20, deep - water frame; 21, drive wheel; 22, through - slot; 23, connecting rod; 24, moving frame; 25, float. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0079] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0080] As Figures 1 to 8 shown, this embodiment proposes an energy storage device for an offshore wind power system, including a power generation platform 1, a power generation mechanism, a buoyancy adjustment mechanism, and a drive mechanism; the power generation mechanism is arranged in the center of the power generation platform 1 and is used for generating electricity by wind power and converting the stored buoyancy into electrical energy for power generation; the buoyancy adjustment mechanism is arranged below the power generation platform 1 and is used for converting and storing excess wind energy and buoyancy; the drive mechanism is arranged on the power generation platform 1, the drive mechanism is in transmission connection with the power generation mechanism, and the drive mechanism is in transmission connection with the buoyancy adjustment mechanism, and the drive mechanism is used for transmitting and connecting the power generation mechanism and the buoyancy adjustment mechanism; wherein, a transmission channel 2 is arranged on one side of the power generation platform 1 away from the power generation mechanism, and both the drive mechanism and the buoyancy adjustment mechanism are assembled and installed through the transmission channel 2.

[0081] As Figures 1 to 4 shown, the power generation mechanism includes a column 3, a unit housing 4, a blade 5, a clutch 6, and a generator 7; the column 3 is fixedly arranged in the center of the power generation platform 1, and the center of the column 3 is hollow; the unit housing 4 is fixedly arranged on the top of the column 3; the blade 5 is rotatably arranged outside the unit housing 4; the clutch 6 is fixedly arranged inside the unit housing 4, and the clutch 6 is in transmission connection with the blade 5; the generator 7 is fixedly arranged inside the unit housing 4, and the generator 7 is in transmission connection with the clutch 6. Through the clutch 6, the blade 5 directly drives the generator 7 to generate electricity, or the blade 5 drives the moving frame 24 to dive into the water, directly converting the wind power into the buoyancy of the float 25, reducing the link of converting wind power into electrical energy and then converting electrical energy into buoyancy and gravitational potential energy for energy storage, reducing the use of some underwater devices, and thus reducing the failure rate and cost.

[0082] As Figures 1 to 4As shown in the figure, the clutch 6 is provided with a first drive shaft 8, a second drive shaft 9 and a third drive shaft 10. The first drive shaft 8 is connected to the blade 5, and the second drive shaft 9 is connected to the generator 7. The first drive shaft 8, the second drive shaft 9 and the third drive shaft 10 are all driven through devices such as gears that cooperate inside the clutch 6. By adjusting the devices inside the clutch 6, the mutual transmission between the first drive shaft 8, the second drive shaft 9 and the third drive shaft 10 can be controlled. Specifically, the clutch 6 can adjust the first drive shaft 8 to drive the second drive shaft 9 to rotate for the wind power generation condition; the clutch 6 can adjust the first drive shaft 8 to drive the third drive shaft 10 to rotate for the energy storage condition of converting wind energy into buoyancy; the clutch 6 can adjust the third drive shaft 10 to drive the second drive shaft 9 to rotate through mechanisms such as gears inside the clutch 6 for the energy release condition.

[0083] As Figures 3 to 7 shown, the drive mechanism includes a linkage assembly, a first transmission frame 11, a gear set and a second transmission frame 12. The linkage assembly is in transmission connection with the clutch 6. The linkage assembly passes through the column 3 and extends into the transmission channel 2. A gear set is connected to one end of the linkage assembly extending into the transmission channel 2. The linkage assembly is used to drive the gear set to move. The first transmission frame 11 is fixedly arranged in the transmission channel 2, and the first transmission frame 11 is sleeved on the linkage assembly. The gear set is sleeved on the first transmission frame 11, and the gear set is used to drive the buoyancy adjustment mechanism to move under the action of the linkage assembly. The second transmission frame 12 is fixedly arranged in the transmission channel 2, and the second transmission frame 12 is sleeved outside the gear set.

[0084] Through the linkage assembly, the rotation of the blade 5 can be transmitted to the gear set, and the gear set then transmits the kinetic energy to the buoyancy adjustment mechanism for the energy storage condition of converting wind energy into buoyancy. As a transmission device, the drive mechanism directly transmits the energy of the rotation of the blade 5 to the moving frame 24 of the buoyancy adjustment mechanism, and the rotation of the blade 5 pulls the moving frame 24 to move for energy storage for the energy storage condition of converting wind energy into buoyancy. Also, when the moving frame 24 in the buoyancy adjustment mechanism moves upward under the action of buoyancy, it drives the gear set to rotate, and the gear set then drives the clutch 6 to act through the linkage assembly, and then makes the generator 7 generate electricity for the energy release condition. Thus, energy storage and energy release are achieved.

[0085] As Figure 4 and Figure 8As shown, the linkage assembly includes a linkage frame 13, a first drive wheel 14, and a second drive wheel 15. The linkage frame 13 is fixedly arranged in the column 3. The first drive wheel 14 is rotatably arranged in the linkage frame 13 and is connected to the third transmission shaft 10. The second drive wheel 15 is rotatably arranged in the linkage frame 13. The first drive wheel 14 is in transmission connection with the second drive wheel 15. A drive rod 16 is arranged on the second drive wheel 15. The drive rod 16 penetrates through the linkage frame 13 and the first transmission frame 11. A belt, a chain, or other transmissible devices are sleeved on the first drive wheel 14 and the second drive wheel 15. A transmission member is sleeved between the first drive wheel 14 and the second drive wheel 15. When the third transmission shaft 10 drives the first drive wheel 14 to rotate, the second drive wheel 15 is driven to rotate through the transmission member. When the second drive wheel 15 rotates, the drive rod 16 is driven to rotate.

[0086] As Figures 6 to 8 shown, a plurality of drive rods 17 are rotatably arranged in the first transmission frame 11. The drive rods 17 penetrate through the second transmission frame 12. One of the drive rods 17 is connected to the drive rod 16. When the drive rod 16 rotates, one of the drive rods 17 is driven to rotate.

[0087] The gear set includes bevel gears 18 and a toothed ring 19. There are a plurality of bevel gears 18. The bevel gears 18 are arranged on the drive rods 17. There are two toothed rings 19. The two toothed rings 19 are arranged on the upper and lower sides of the plurality of bevel gears 18. The toothed rings 19 are rotatably arranged on the first transmission frame 11. All the plurality of bevel gears 18 are meshed with the two toothed rings 19. In this embodiment, there are four drive rods 17 and four deep - water frames 20. When the drive rod 16 drives the drive rod 17 connected to it to rotate, a bevel gear 18 at its end is driven to rotate, and then the two toothed rings 19 are driven to rotate on the first transmission frame 11. When the two toothed rings 19 rotate, the other three bevel gears 18 are driven to rotate simultaneously, so that the four bevel gears 18 and the four drive rods 17 rotate at the same speed. The drive rod 17 drives the transmission chain to move and pulls the moving frame 24 into the water.

[0088] As Figures 1 to 6 shown, the buoyancy adjustment mechanism includes deep - water frames 20, drive wheels 21, and buoyancy components. There are a plurality of deep - water frames 20. The deep - water frames 20 correspond to the drive rods 17 one by one. The deep - water frames 20 are fixedly arranged in the transmission channel 2. One end of the drive rod 17 extends into the deep - water frame 20. The drive wheels 21 are rotatably arranged in the deep - water frames 20. A transmission chain is tensioned and sleeved on the drive wheels 21 and the drive rods 17. The buoyancy components are arranged on the transmission chain and are used for lifting and storing energy in seawater. Specifically, when the drive rod 17 rotates, the transmission chain is driven to move with the drive wheel 21 as the support. When the transmission chain moves, the buoyancy components are driven to move up and down.

[0089] The buoyancy assembly includes a through slot 22, a connecting rod 23, a moving frame 24, and a float 25; the through slot 22 is opened on the side of the deep water frame 20, a connecting rod 23 is fixedly arranged on each transmission chain, the connecting rod 23 passes through the through slot 22, the moving frame 24 is arranged on the connecting rod 23 and is fixedly connected to each connecting rod 23; a plurality of floats 25 are provided, the plurality of floats 25 are arranged on the moving frame 24, the moving frame 24 is sleeved outside the plurality of deep water frames 20, and the moving frame 24 is connected to the four connecting rods 23. In this embodiment, 8 floats 25 are provided. Therefore, the connecting rod 23 passes through the through slot 22 and is connected to the moving frame 24, the deep water frame 20 extends into the water, the moving frame 24 surrounds the deep water frame 20, and it can be lifted and lowered within the range where the deep water frame 20 extends into the water.

[0090] When each transmission rod 17 rotates simultaneously, driven by the corresponding driving wheel 21, the corresponding transmission chain is driven to move, and then the connecting rod 23 is driven to move up and down along the through slot 22 on the side of the deep water frame 20; when all the connecting rods 23 move up and down, the moving frame 24 is driven to move up and down; since the deep water frame 20 extends into the water and the moving frame 24 surrounds the deep water frame 20, therefore, the moving frame 24 can be lifted and lowered within the range where the deep water frame 20 extends into the water.

[0091] In summary, the working principle of this energy storage device for an offshore wind power system is as follows:

[0092] The blade 5 rotates under the action of wind power, and the blade 5 drives the generator 7 to generate electricity through the clutch 6; when energy storage is required, the clutch 6 causes the first transmission shaft 8 to drive the third transmission shaft 10 to rotate, the third transmission shaft 10 drives the first transmission wheel 14 to drive the second transmission wheel 15 to rotate, the second transmission wheel 15 drives the driving rod 16 to rotate, the driving rod 16 drives the transmission rod 17 connected thereto to rotate, the transmission rod 17 drives the bevel gear 18 to rotate, the bevel gear 18 drives the two toothed rings 19 to rotate, the two toothed rings 19 drive the other three bevel gears 18 to rotate, so that the four transmission rods 17 rotate at a uniform speed. The transmission rod 17 drives the driving wheel 21 to rotate through the transmission chain, the transmission chain drives the connecting rod 23 to move up and down in the through slot 22, the four connecting rods 23 drive the moving frame 24 to descend, and the float 25 moves into the water; when the stored energy needs to be released, the clutch 6 controls the third transmission shaft 10 to drive the second transmission shaft 9 to rotate, the float 25 moves upward under the action of buoyancy, the transmission chain drives the transmission rod 17 to rotate, and the transmission rod 17 drives the first transmission wheel 14 to rotate through the bevel gear 18, toothed ring 19, driving rod 16, and second transmission wheel 15, and then drives the generator 7 to generate electricity.

[0093] Specifically, the present invention provides an operation method for applying an energy storage device of an offshore wind power system, including the following steps:

[0094] Step S1, by adjusting the clutch 6, the energy storage device of the offshore wind power system performs the wind power generation condition of Step S2, the energy storage condition of converting wind energy into buoyancy of Step S3, and the energy release condition of Step S4 as required;

[0095] Step S2, wind power generation condition:

[0096] In the wind power generation condition, adjust the clutch 6 to drive the first drive shaft 8 and the second drive shaft 9, disconnect the third drive shaft 10 from the first drive shaft 8, and disconnect the third drive shaft 10 from the second drive shaft 9;

[0097] The blade 5 rotates under the action of wind. When the blade 5 rotates, through the transmission between the first drive shaft 8 and the second drive shaft 9 of the clutch 6, the generator 7 is driven to generate electricity;

[0098] Step S3, energy storage condition of converting wind energy into buoyancy:

[0099] In the energy storage condition of converting wind energy into buoyancy, adjust the clutch 6 to drive the first drive shaft 8 and the third drive shaft 10, disconnect the transmission between the third drive shaft 10 and the second drive shaft 9, and the transmission between the first drive shaft 8 and the second drive shaft 9 can be transmitted or disconnected; that is to say, the energy storage condition of converting wind energy into buoyancy can be carried out independently or simultaneously with the wind power generation condition.

[0100] The blade 5 rotates under the action of wind. Through the transmission between the first drive shaft 8 and the third drive shaft 10 of the clutch 6, when the blade 5 rotates, it drives the first drive shaft 8 to rotate, and then drives the third drive shaft 10 to rotate;

[0101] When the third drive shaft 10 rotates, it drives the moving frame 24 in the buoyancy adjustment mechanism to descend stably through the drive mechanism, and then the float 25 moves into the water, converting wind energy into buoyancy to perform the energy storage condition of converting wind energy into buoyancy;

[0102] In this step, when the third drive shaft 10 rotates, it drives the moving frame 24 in the buoyancy adjustment mechanism to descend stably, specifically:

[0103] When the third drive shaft 10 rotates, it drives the first transmission wheel 14 to rotate. The first transmission wheel 14 drives the second transmission wheel 15 to rotate through the transmission part; when the second transmission wheel 15 rotates, it drives the connected drive rod 16 to rotate;

[0104] When the drive rod 16 rotates, it drives one of the transmission rods 17 connected to it to rotate;

[0105] When the transmission rod 17 rotates, it drives the bevel gear 18 at its end to rotate, and then drives the two toothed rings 19 to rotate on the first transmission frame 11; when the two toothed rings 19 rotate, they drive all the other bevel gears 18 to rotate simultaneously, and then drive all the other transmission rods 17 to rotate, thereby realizing the uniform rotation of all the transmission rods 17;

[0106] When all the transmission rods 17 rotate uniformly, they drive each transmission chain to move with the driving wheel 21 as the support; when the transmission chain moves, it drives the connecting rod 23 to descend in the through groove 22, and all the connecting rods 23 drive the moving frame 24 to descend stably;

[0107] Step S4, energy release condition:

[0108] In the energy release condition, the clutch 6 is adjusted to enable transmission between the third transmission shaft 10 and the second transmission shaft 9, and disconnect the transmission between the first transmission shaft 8 and the third transmission shaft 10; transmission or disconnection of transmission can be carried out between the first transmission shaft 8 and the second transmission shaft 9; that is to say, the energy release condition can be carried out independently or simultaneously with the wind power generation condition.

[0109] The floating buoy 25 moves upward under the action of buoyancy, thereby driving the moving frame 24 to move upward; when the moving frame 24 moves upward, it drives the third transmission shaft 10 to rotate through the driving mechanism, and the third transmission shaft 10 drives the second transmission shaft 9 to rotate, and then drives the generator 7 to generate electricity, completing the energy release.

[0110] In this step, when the moving frame 24 moves upward, it drives the third transmission shaft 10 to rotate through the driving mechanism, specifically:

[0111] When the moving frame 24 moves upward, it drives the connecting rod 23 to move upward in the through groove 22; when each connecting rod 23 moves upward, it drags the transmission chain to move; the movement of the transmission chain drives the transmission rod 17 to rotate, and the transmission rod 17 drives the driving rod 16 to rotate through the meshing of the bevel gear 18 and the toothed ring 19; the driving rod 16 drives the second transmission wheel 15 to rotate; the second transmission wheel 15 drives the first transmission wheel 14 to rotate through the transmission member, and then drives the third transmission shaft 10 to rotate.

[0112] The offshore wind power system energy storage device and operation method provided by the present invention have the following advantages:

[0113] 1. In the present invention, by setting the clutch, the adjusting blade directly drives the generator to generate electricity through the clutch, or the blade drives the moving frame to dive into the water, directly converting the wind energy into the buoyancy of the floating buoy, reducing the link of converting the wind energy into electric energy and then converting the electric energy into buoyancy and gravitational potential energy for energy storage, reducing the use of some underwater devices, and thus reducing the failure rate and cost;

[0114] 2. In the present invention, by providing a power generation mechanism, while generating electricity normally, the excess energy can be directly converted into buoyancy, reducing the use of redundant devices and energy loss. By providing a buoyancy adjustment mechanism, energy can be stored only by ascending and descending in water. By providing a driving mechanism, the kinetic energy of the rotating paddle blades can be evenly transmitted to the moving frame, enabling the moving frame to maintain balance during both ascending and descending.

[0115] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An offshore wind power system energy storage device, characterized in that: include: Power generation platform (1); A power generation mechanism, the power generation mechanism is arranged at the center of the power generation platform (1), the power generation mechanism is used to generate electricity through wind power and convert the stored buoyancy into electrical energy for power generation; A buoyancy regulating mechanism, the buoyancy regulating mechanism being arranged below the power generation platform (1), and being used for converting and storing excess wind energy into buoyancy; A driving mechanism, the driving mechanism being arranged on the power generation platform (1), the driving mechanism being in transmission connection with the power generation mechanism, the driving mechanism being in transmission connection with the buoyancy regulating mechanism, and the driving mechanism being used to perform transmission connection between the power generation mechanism and the buoyancy regulating mechanism; Wherein, a transmission channel (2) is provided on a side of the power generation platform (1) away from the power generation mechanism, and the drive mechanism and the buoyancy adjustment mechanism are both assembled and installed through the transmission channel (2).

2. The offshore wind power system energy storage device according to claim 1, characterized in that: The power generation mechanism comprises: A column (3), the column (3) being fixedly arranged at the center of the power generation platform (1), and the center of the column (3) being arranged to be hollow; A unit casing (4), wherein the unit casing (4) is fixedly arranged on the top of the column (3); A blade (5), wherein the blade (5) is rotatably arranged outside the unit casing (4); A clutch (6), wherein the clutch (6) is fixedly arranged inside the unit housing (4), and the clutch (6) is drivingly connected to the blade (5); the clutch (6) is drivingly connected to one end of the driving mechanism; A generator (7), the generator (7) is fixedly arranged inside the unit housing (4), and the generator (7) is drivingly connected to the clutch (6).

3. The offshore wind power system energy storage device according to claim 2, characterized in that: The clutch (6) is provided with a transmission shaft 1 (8), a transmission shaft 2 (9) and a transmission shaft 3 (10); the transmission shaft 1 (8) is connected to the blade (5), the transmission shaft 2 (9) is connected to the generator (7); the transmission shaft 3 (10) is in transmission connection with one end of the driving mechanism; The transmission shaft 1 (8), the transmission shaft 2 (9) and the transmission shaft 3 (10) are all transmitted through a gear device that cooperates with each other inside the clutch (6); by adjusting the gear device inside the clutch (6), the mutual transmission between the transmission shaft 1 (8), the transmission shaft 2 (9) and the transmission shaft 3 (10) can be controlled; the clutch (6) can adjust the transmission shaft 1 (8) to drive the transmission shaft 2 (9) to rotate, so as to perform a wind power generation operation; the clutch (6) can adjust the transmission shaft 1 (8) to drive the transmission shaft 3 (10) to rotate, so as to perform an energy storage operation in which wind energy is converted into buoyancy; the clutch (6) can adjust the transmission shaft 3 (10) to drive the transmission shaft 2 (9) to rotate, so as to perform an energy release operation.

4. The offshore wind power system energy storage device according to claim 3, characterized in that: The driving mechanism comprises: A linkage assembly, the linkage assembly being in driving connection with the clutch (6), the linkage assembly passing through the column (3) and extending into the transmission channel (2), a gear set being connected to one end of the linkage assembly extending into the transmission channel (2), the linkage assembly being used to drive the gear set to move; A transmission frame (11), wherein the transmission frame (11) is fixedly arranged in the transmission channel (2), and the transmission frame (11) is sleeved on the linkage assembly; The gear set is sleeved on the transmission frame 1 (11), and the gear set is used to drive the buoyancy adjustment mechanism to move under the action of the linkage assembly; A second transmission frame (12), the second transmission frame (12) being fixedly arranged in the transmission channel (2), and the second transmission frame (12) being sleeved on the outside of the gear set; The rotation of the blade (5) is transmitted to the gear set through the linkage assembly, and the gear set then transmits the kinetic energy to the buoyancy regulating mechanism, thereby performing an energy storage condition in which wind energy is converted into buoyancy; and when the buoyancy regulating mechanism moves upward, it drives the gear set to rotate, and the gear set then drives the clutch (6) to operate through the linkage assembly, thereby causing the generator (7) to generate electricity, thereby performing an energy release condition.

5. The offshore wind power system energy storage device according to claim 4, characterized in that: The linkage components include: A linkage frame (13), wherein the linkage frame (13) is fixedly arranged in the column (3); A transmission wheel (14), the transmission wheel (14) is rotatably arranged in the linkage frame (13), and the transmission wheel (14) is connected to the transmission shaft (10); A second transmission wheel (15), the second transmission wheel (15) is rotatably arranged in the linkage frame (13), the first transmission wheel (14) is transmission-connected with the second transmission wheel (15), a driving rod (16) is arranged on the second transmission wheel (15), and the driving rod (16) passes through the linkage frame (13) and the first transmission frame (11); A transmission member is sleeved between the transmission wheel 1 (14) and the transmission wheel 2 (15); when the transmission shaft 3 (10) drives the transmission wheel 1 (14) to rotate, the transmission member drives the transmission wheel 2 (15) to rotate; when the transmission wheel 2 (15) rotates, the driving rod (16) is driven to rotate.

6. The offshore wind power system energy storage device according to claim 5, characterized in that: The transmission frame 1 (11) is rotatably provided with a plurality of transmission rods (17), and the transmission rods (17) penetrate the transmission frame 2 (12); one of the transmission rods (17) is connected to the driving rod (16); when the driving rod (16) rotates, it drives one of the transmission rods (17) to rotate.

7. The offshore wind power system energy storage device according to claim 6, characterized in that: The gear set comprises: A bevel gear (18), wherein a plurality of the bevel gears (18) are provided, and each of the bevel gears (18) is provided at one end of each of the transmission rods (17); A gear ring (19), wherein two gear rings (19) are provided, and the two gear rings (19) are provided on upper and lower sides of the plurality of bevel gears (18), and the gear rings (19) are rotatably provided on the transmission frame (11), and the plurality of bevel gears (18) are all meshed with the two gear rings (19); When the driving rod (16) rotates, it drives a transmission rod (17) connected thereto to rotate. When the transmission rod (17) rotates, it drives the bevel gear (18) at its end to rotate, thereby driving the two gear rings (19) to rotate on the transmission frame (11). When the two gear rings (19) rotate, they drive the other bevel gears (18) to rotate simultaneously, thereby driving the other transmission rods (17) to rotate, thereby achieving the same speed rotation of all the transmission rods (17).

8. The offshore wind power system energy storage device according to claim 7, characterized in that: The buoyancy adjustment mechanism comprises: A deep water frame (20), wherein a plurality of the deep water frames (20) are provided, and the deep water frames (20) correspond to the transmission rods (17) one by one, and the deep water frames (20) are fixedly arranged in the transmission channel (2), and one end of the transmission rod (17) extends into the deep water frame (20); A driving wheel (21), the driving wheel (21) being rotatably disposed in the deep water frame (20), and a transmission chain being provided between the driving wheel (21) and a tension sleeve at one end of the transmission rod (17); A buoyancy assembly, the buoyancy assembly being arranged on the transmission chain and being used for lifting and lowering in seawater to store energy; When the transmission rod (17) rotates, it drives the transmission chain to move with the driving wheel (21) as support; when the transmission chain moves, it drives the buoyancy component to move up and down; The buoyancy assembly comprises: A passing groove (22), wherein the passing groove (22) is opened on the side of the deep water frame (20); A connecting rod (23), each of the transmission chains is fixedly provided with the connecting rod (23), and the connecting rod (23) passes through the passing slot (22); A moving frame (24), wherein the moving frame (24) is arranged on the connecting rods (23) and is connected and fixed to each of the connecting rods (23); the moving frame (24) is sleeved on the outside of the plurality of deep water frames (20); A float (25), wherein a plurality of the floats (25) are provided, and the plurality of the floats (25) are arranged on the motion frame (24); When each of the transmission rods (17) rotates simultaneously, the corresponding transmission chain is driven to move through the support of the corresponding driving wheel (21), thereby driving the connecting rod (23) to move up and down along the through groove (22) on the side of the deep water frame (20); when all the connecting rods (23) move up and down, the moving frame (24) is driven to move up and down; because the deep water frame (20) is immersed in the water, the moving frame (24) surrounds the deep water frame (20), and therefore, the moving frame (24) can be raised and lowered within the range where the deep water frame (20) is immersed in the water.

9. The method for operating the offshore wind power system energy storage device according to claim 8, characterized in that: The following steps are involved: Step S1, by adjusting the clutch (6), the offshore wind power system energy storage device performs the wind power generation condition of step S2, the energy storage condition of converting wind energy into buoyancy of step S3, and the energy release condition of step S4 as required; Step S2, wind power generation condition: In the wind power generation condition, the clutch (6) is adjusted to make the transmission shaft 1 (8) and the transmission shaft 2 (9) transmit the power, disconnect the transmission shaft 3 (10) and the transmission shaft 1 (8), and disconnect the transmission between the transmission shaft 3 (10) and the transmission shaft 2 (9); The blades (5) rotate under the action of wind force. When the blades (5) rotate, the transmission action between the transmission shaft 1 (8) and the transmission shaft 2 (9) of the clutch (6) drives the generator (7) to generate electricity; Step S3, energy storage condition of converting wind energy into buoyancy: When the wind energy is converted into buoyancy energy storage condition, the clutch (6) is adjusted to make the transmission shaft 1 (8) and the transmission shaft 3 (10) transmit the power, and the transmission between the transmission shaft 3 (10) and the transmission shaft 2 (9) is disconnected, so that the transmission shaft 1 (8) and the transmission shaft 2 (9) can transmit or disconnect the power; The blades (5) rotate under the action of wind force. Through the transmission action between the transmission shaft 1 (8) and the transmission shaft 3 (10) of the clutch (6), when the blades (5) rotate, the transmission shaft 1 (8) is driven to rotate, and then the transmission shaft 3 (10) is driven to rotate; When the transmission shaft 3 (10) rotates, the driving mechanism drives the moving frame (24) in the buoyancy regulating mechanism to steadily descend, thereby causing the float (25) to move into the water, converting wind energy into buoyancy, and performing an energy storage condition of converting wind energy into buoyancy; Step S4, energy release condition: In the energy release condition, the clutch (6) is adjusted to enable transmission between the transmission shaft three (10) and the transmission shaft two (9), and to disconnect the transmission between the transmission shaft one (8) and the transmission shaft three (10); the transmission between the transmission shaft one (8) and the transmission shaft two (9) can be transmitted or disconnected; The float (25) moves upward under the action of buoyancy, thereby driving the moving frame (24) to move upward; when the moving frame (24) moves upward, the driving mechanism drives the transmission shaft three (10) to rotate, and the transmission shaft three (10) drives the transmission shaft two (9) to rotate, thereby driving the generator 7 to generate electricity, thereby completing energy release.

10. The operating method according to claim 9, characterized in that: When the energy storage condition of converting wind energy into buoyancy is being performed, when the transmission shaft 3 (10) rotates, the motion frame (24) in the buoyancy adjustment mechanism is driven to steadily descend through the driving mechanism, specifically: When the transmission shaft 3 (10) rotates, the transmission wheel 1 (14) is driven to rotate, and the transmission wheel 1 (14) drives the transmission wheel 2 (15) to rotate through the transmission member; when the transmission wheel 2 (15) rotates, it drives the connected driving rod (16) to rotate; When the driving rod (16) rotates, it drives one of the transmission rods (17) connected thereto to rotate; When the transmission rod (17) rotates, the bevel gear (18) at its end is driven to rotate, thereby driving the two gear rings (19) on the transmission frame (11) to rotate; when the two gear rings (19) rotate, the other bevel gears (18) are driven to rotate simultaneously, thereby driving the other transmission rods (17) to rotate, thereby achieving uniform rotation of all the transmission rods (17); When all the transmission rods (17) rotate at a uniform speed, they drive each transmission chain to move with the driving wheel (21) as support; when the transmission chain moves, it drives the connecting rod (23) to descend in the groove (22), and all the connecting rods (23) drive the moving frame (24) to descend stably; When the energy release condition is in progress, when the moving frame (24) moves upward, the driving mechanism drives the transmission shaft 3 (10) to rotate, specifically: When the moving frame (24) moves upward, it drives the connecting rod (23) to move upward in the groove (22); when each connecting rod (23) moves upward, it drags the transmission chain to move; the movement of the transmission chain drives the transmission rod (17) to rotate, and the transmission rod (17) then drives the driving rod (16) to rotate through the engagement of the bevel gear (18) and the gear ring (19); the driving rod (16) drives the transmission wheel 2 (15) to rotate; the transmission wheel 2 (15) drives the transmission wheel 1 (14) to rotate through the transmission member, and then drives the transmission shaft 3 (10) to rotate.

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