Offshore power generation platform considering wave-current coupling

Abstract

The application discloses a kind of offshore power generation platform considering wave current coupling, comprising: cylindrical box power generation component, float power generation component;The cylindrical box power generation component includes: three generators, ballast tank, three generators swing power generation by connecting rod;The float power generation component is arranged around cylindrical box by connecting rod circumferential array;The float power generation component includes: helical impeller, energy storage spring, vibration energy storage block, ratchet push rod component, speed increasing assembly, generator, wave current coupling component and transmission device;The ratchet push rod component collects wave energy and makes output shaft unidirectional rotation, the helical impeller collects tidal current energy and makes output shaft unidirectional rotation, and the wave current coupling component is coupled after the superposition of two unidirectional rotations and is output.The present application collects tidal current energy and wave energy and is coupled and superimposed output, so that the energy utilization of marine unit area is higher, better economic benefits are obtained, and the stability of device is improved.

Description

Technical Field

[0001] This invention relates to the field of marine new energy technology, specifically to an offshore power generation platform that takes into account wave-current coupling. Background Technology

[0002] Energy is a crucial driving force for human development and social progress. However, traditional fossil fuels, after long-term, intensive extraction and consumption, are facing increasing depletion. In this context, humanity is increasingly turning its attention to the vast field of ocean energy. Ocean waves and currents can coexist in the ocean, and their capture methods do not interfere with each other. These two energy sources can be coupled and output, increasing unit energy output, improving the utilization rate of ocean space, smoothing power output fluctuations, and reducing construction and maintenance costs. Therefore, research on multi-energy simultaneous utilization devices is currently an important direction in ocean energy research.

[0003] Publication No. CN 116146410 A discloses a dual-buoy wave energy generation device, including: a connecting rod and two identical float power generation components; the two float power generation components are respectively disposed at both ends of the connecting rod; the float power generation component includes: a float housing, within which a generator, a connecting rod, a support member, a first transmission component, a second transmission component, and a gear ring; one end of the connecting rod is hinged to one end of the connecting rod by a revolute joint, and the other end of the connecting rod is fixedly connected to the gear ring; the inner ring of the gear ring is provided with two staggered and opposite ratchet racks, the two ratchet racks being aligned at their adjacent ends; one end of the support member is fixedly connected to the bottom surface of the float housing, and the other end is hinged to the connecting rod by a revolute joint; the ratchet racks of the gear ring mesh with the gear at the input end of the first transmission component, and the output end of the first transmission component is drively connected to the input end of the generator. However, the aforementioned devices can only collect wave energy, requiring bidirectional collection and output from the impeller and float during the buoy's up-and-down oscillations. This results in a bidirectional generator, which is too costly, has low ocean energy utilization, lacks an energy-absorbing resonance device, floats on the sea surface, has low wind resistance, and poor stability. Furthermore, it can only absorb wave energy and cannot absorb tidal energy, leading to low energy utilization per unit area of ​​the ocean. Therefore, the effective utilization rate of wave energy is not high. Thus, reliability and conversion efficiency are particularly important. Considering the platform's own safety, the efficiency of ocean space utilization, and energy conversion efficiency, a combined wave and current power generation platform device that can simultaneously convert wave energy and ocean current energy, and boasts high safety and stability, is needed. Summary of the Invention

[0004] This invention provides an offshore power generation platform that takes into account wave-current coupling to solve the problems of low efficiency in the utilization of existing marine space, poor safety and stability, and single energy utilization.

[0005] A marine power generation platform considering wave-current coupling includes a cylindrical box-shaped power generation assembly and a float-shaped power generation assembly. The cylindrical box-shaped power generation assembly includes three generators and a ballast tank. The three generators generate electricity by swinging through connecting rods. The float-shaped power generation assembly is arranged in a circumferential array around the cylindrical box through connecting rods. The connecting rods swing up and down through pins fixed to the cylindrical box. The float-shaped power generation assembly includes a helical impeller, an energy storage spring, a vibrating energy storage block, a ratchet push rod assembly, a speed-increasing assembly, a generator, a wave-current coupling assembly, and a transmission device. The ratchet push rod assembly collects wave energy to enable unidirectional rotation of the output shaft, the helical impeller collects tidal energy to enable unidirectional rotation of the output shaft, and the wave-current coupling assembly couples the two unidirectional rotations together for output.

[0006] Furthermore, the cylindrical tank power generation assembly includes: a connecting rod, a generator, a transmission rod, a pin, a ballast tank, and a partition. The cylindrical tank is divided into upper and lower sealed parts by the partition. The upper part is equipped with a power generation device, and the lower part is a ballast tank. The transmission rod and the connecting rod are movably hinged together, and the connecting rod and the cylindrical tank are movably connected by a pin. The generator is pulled up and down with the waves to generate electricity. The generator is a bidirectional rotary generator that can be converted to a unidirectional rotary generator. The ballast tank can be adjusted according to the weather to allow ballast water flow, thereby improving stability.

[0007] Furthermore, the float power generation assembly includes: an upper float housing, a lower float housing, and a helical impeller. The upper float housing and the lower float housing are fixed together, and the helical impeller passes through the lower float housing and enters the interior of the upper float housing.

[0008] Furthermore, the upper shell of the float is provided with a first support rod, a second support rod, a first transmission assembly, a second transmission assembly, a ratchet push rod assembly, a speed-increasing assembly, a generator, a push rod, and a wave-current coupling assembly. One end of the push rod is hinged to one end of the connecting rod via a revolute joint, and the other end of the push rod is hinged to the input end of the ratchet push rod via a revolute joint. The ratchet push rod assembly mainly consists of a push rod, a rotating rod, a ratchet, a pawl, a pressure plate, and a main shaft. The two push rods are rotatably connected to each other via pins, and the other end of the push rod is connected to the rotating rod via a pin. The rotating rod is mounted on the main shaft via bearings. The pawl and the pressure plate are respectively mounted on the other end of the rotating rod via pins. The ratchet push rod assembly is mounted on the main shaft via a flat key. A coil spring is installed between the pressure plate and the rotating rod so that the pressure plate presses the pawl onto the teeth of the ratchet. One end of the first support member is fixedly connected to the bottom surface of the float shell, and the other end is sleeved outside the push rod and slides with the push rod. The connection is as follows: The second support is vertically installed inside the upper shell of the float. One end of the support is fixedly connected to the bottom surface of the float shell, and the other end of the support is hinged to the connecting rod in a rotating pair manner. The push rod is arranged parallel to the first and second support members, and the push rod and the first support member are hinged together in the same direction of movement. The gear of the ratchet push rod assembly is coaxial with the gear of the first transmission assembly. The output end of the first transmission assembly is connected to the input end of the speed-increasing assembly, and the output end of the speed-increasing assembly is connected to the input end of the generator. The float power generation assembly floats up and down with the waves. One float power generation assembly makes a deep motion with the hinge point between the second support member and the connecting rod as the hinge point, which drives the connecting rod at the same end and the push rod in the ratchet push rod assembly connected to the push rod to make up-and-down reciprocating motion. The ratchet of the ratchet push rod assembly drives the coaxial gear on the first transmission assembly to rotate in the same direction. The first transmission assembly drives the input shaft of the generator to rotate and generate electricity.

[0009] Furthermore, the float power generation assembly also includes: a spiral impeller and a second transmission assembly; the output shaft of the spiral impeller penetrates the lower shell of the float and enters the upper shell of the float, meshing with the input end rack of the second transmission assembly for transmission; the output end gear of the second transmission assembly meshes with the gear on the main shaft of the first transmission assembly for transmission; and the first transmission assembly drives the input shaft of the generator to rotate and generate electricity.

[0010] Furthermore, the helical impeller blades are subjected to force perpendicular to the shaft and rotate in one direction.

[0011] Furthermore, the lower housing of the float power generation component includes an energy storage spring and a vibration energy storage block, wherein the stiffness coefficient of the energy storage spring is approximately 1000 N / m, and the mass of the vibration energy storage block is approximately 95 kg, which can improve the power generation efficiency.

[0012] Furthermore, the speed-increasing component inside the upper shell of the float achieves bipolar speed increase, increasing the power generation speed by 4 times.

[0013] Furthermore, the float is connected to the cylindrical box via a connecting rod, and the ratio between the three contact points of the connecting rod is 1:2, which can fully absorb wave energy and improve power generation efficiency.

[0014] Furthermore, the wave-current coupling assembly includes: a planetary helical gear, a planetary disk, a central gear, and internal and external double gears. Three planetary helical gears are fixed on the planetary disk by bearings. The central gear meshes with the three planetary helical gears for transmission. The planetary helical gears mesh with the internal and external double gears for transmission.

[0015] Furthermore, the wave-current coupling component can couple the rotation of the main shaft driven by tidal energy with the rotation of the main shaft driven by wave energy to achieve superimposed force output.

[0016] The beneficial effects of this invention are:

[0017] This invention employs a cylindrical box assembly and a float power generation assembly that undergo relative oscillation under wave force, and a helical impeller that undergoes unidirectional rotation under water flow force. This achieves simultaneous power generation from the internal wave-flow coupling of the three floats and the external cylindrical box, improving the stability and power generation efficiency of the device. The cylindrical box is moored to the seabed by cables and contains three bidirectional to unidirectional generators. The free up-and-down oscillation of the floats drives the transmission rods to move up and down, thereby driving the generators to generate electricity. The float power generation assembly contains a first support member and a second support member. The first support member restricts the up-and-down oscillation of the connecting rod, while the second support member, through a connecting rod, increases the transmission efficiency of the float energy harvesting mechanism, enabling the generator to rotate continuously and generate electricity. The input-to-output gear radius ratio of the second transmission component is 2:1.5 to increase the rotational speed. The ratchet radius ratio of the first transmission component to the output gear radius of the second transmission component is 1:0.9. In high-speed, high-load operating environments, gears with a higher number of teeth are required to improve operational stability and ensure that the ratchet effectively transmits torque to the main shaft. The blades of the helical impeller are subjected to force perpendicular to the helical shaft, enabling good self-starting. The helical impeller always rotates in one direction, allowing the power mechanism to rotate repeatedly via a transmission mechanism, ensuring continuous generator operation. Each of the three floats has a large gear on its first transmission assembly. The up-and-down movement of the floats drives the large gears to rotate, enabling efficient energy storage and increasing the main shaft rotation speed for continuous and efficient power generation. Each of the three floats employs a parallel transmission mechanism to increase the relative speed of the generators. The lower housing of each float contains a spring with approximately 1000 N / m stiffness and a 95 kg vibration energy storage device, which stores energy through float vibration and helical impeller rotation, improving the efficiency of converting wave energy into mechanical energy. Each of the three floats contains a wave-current coupling output mechanism, achieving a superimposed coupling output of the rotational force of the ocean current and the rotational force of the wave energy, realizing an energy "1+1=2". This saves costs compared to dual-motor power generation with dual acquisition and dual output, while improving stability. Each of the three floats also contains a ratchet push rod assembly. The rotating lever, push rod, and connecting rod in the ratchet push rod assembly are connected by a rotating joint hinge. The length ratio of the three contact points of the connecting rod is approximately 1:8, which can fully absorb wave energy, increasing the device's vertical oscillation stroke without being limited by wave height, and improving energy utilization efficiency. A single-rotor generator is used inside the float, and the power output system is placed inside the float for easy maintenance and away from corrosive seawater, thereby improving the reliability and survivability of the equipment. A speed-increasing component is set between the output end of the first transmission component and the input end of the generator. The speed-increasing component achieves bipolar speed increase, increasing the output shaft rotation speed to four times the original speed, thereby improving power generation efficiency. The device's transmission system has a simple structure, high energy transfer efficiency, and stable energy output. The three-array floats arranged around the cylindrical box platform have stronger wind resistance than the dual-float system, while the bottom of the platform is a ballast tank, which improves stability and extends service life in severe weather. Attached Figure Description

[0018] The features and advantages of the invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention;

[0020] Figure 2-a This is a schematic diagram of the internal power generation components of the mooring container platform according to a specific embodiment of the present invention;

[0021] Figure 2-b This is a schematic diagram of the top structure of the mooring box platform according to a specific embodiment of the present invention;

[0022] Figure 3 This is a three-dimensional view of the internal structure of the float power generation component according to a specific embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the transmission of a single-direction rotating ratchet push rod mechanism according to a specific embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the speed-up component structure according to a specific embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the energy storage spring structure inside the lower shell of the float according to a specific embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the helical impeller drive connection according to a specific embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the spindle structure according to a specific embodiment of the present invention;

[0028] Figure 9-a This is a front view of the spindle-mounted wave-current coupling component structure according to a specific embodiment of the present invention;

[0029] Figure 9-b This is a rear view of the spindle-mounted wave-current coupling component structure according to a specific embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the spindle drive according to a specific embodiment of the present invention;

[0031] Figure 11-a This is a schematic diagram of the first type of transmission of the wave-current coupling component according to a specific embodiment of the present invention;

[0032] Figure 11-b This is a schematic diagram of the second type of transmission of the wave-current coupling component according to a specific embodiment of the present invention;

[0033] Figure 11-c This is a schematic diagram of the third type of transmission of the wave-current coupling component according to a specific embodiment of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The present invention will be further illustrated below with reference to specific embodiments. Those skilled in the art should understand that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Modifications to the present invention in various equivalent forms all fall within the scope defined by the appended claims.

[0036] This invention provides, for example Figure 1 , Figure 2-a , Figure 2-b , Figure 3 As shown, a specific embodiment of the present invention provides an offshore power generation platform considering wave-current coupling, comprising: a fixed hull 8, a ballast tank 81, a pin 84, a transmission rod 83, a bidirectional generator 87, a bulkhead 86, and a fixed suspension port 9; a connecting rod 1 is hinged to the transmission rod 83 and can swing and pull; one end of the connecting rod 1 is hinged to the transmission rod 83 inside the fixed hull 8, and connected to the hull via the pin 84, allowing it to swing up and down with 84 as a fulcrum; the up-and-down movement of the float causes the transmission rod to rotate, driving the generator 87 to generate electricity, as detailed below. Figure 1-3 As shown.

[0037] The float power generation assembly includes: an upper float housing 5, a lower float housing 6, a first support member 3, a second support member 4, a push rod 2, a spiral impeller 7, and an energy storage mechanism within the lower float housing, as detailed below. Figure 5-7 As shown.

[0038] The energy storage component includes: an energy storage shell 61, an energy storage spring 611, and a vibrating energy storage block 612. The upper and lower energy storage springs 611 are fixedly connected to the vibrating energy storage block 612, the energy storage shell 61, and the shell 6. The whole assembly moves on the same axis. The upper shell 5 and the lower shell 6 of the float are fixedly connected. When the float vibrates up and down, the springs will be subjected to force, which will drive the vibrating energy storage block to vibrate. The entire float will vibrate accordingly, increasing the amplitude and improving the efficiency of converting wave energy into mechanical energy.

[0039] One end of push rod 2 is connected to one end of connecting rod 1 via a revolute joint, and the other end of push rod 2 extends into the upper housing 5 of the float and is hinged to push rod 111 of ratchet push rod assembly 11 via a rotational hinge; ratchet push rod assembly 11, specifically as follows Figure 4It includes: push rod 111, rotating rod 112, ratchet 114, pawl 115, pressure plate 113, and pin 116. The two push rods 111 are connected to each other via pin 116. The other end of the push rod 111 is connected to the rotating rod 112 via pin 116. The rotating rod 112 is mounted on the main shaft 12 via bearings. The pawl 115 and the pressure plate are respectively mounted on the other end of the rotating rod 112 via pin 116. The ratchet 114 is mounted on the main shaft 12 via a flat key. A coil spring is installed between the pressure plate 113 and the rotating rod 112 so that the pressure plate presses the pawl 115 onto the teeth of the ratchet 114.

[0040] The first drive shaft 12 is mounted inside the float housing 5 via bearing seats at both ends. The worm gear 121 on the first drive shaft 12 serves as the output of the first drive shaft 12 and meshes with the worm 13 mounted on the bottom surface of the float housing 5 via bearing seats. The output end of the worm 13 is connected to the input end of the speed-increasing assembly 18, driving the internal gears of the speed-increasing assembly to mesh and transmit power. Figure 5 The speed-increasing component consists of gears 181, 182, and 183. The output end 19 of the speed-increasing component is connected to the input end of the outer rotor of the generator 16 via a transmission belt 14. The first transmission shaft 12, the worm gear 13, and the transmission belt 14 can constitute the first transmission component.

[0041] One end of the second support member 4 is hinged to the connecting rod 1 via a revolute joint. The second support member 4 and the push rod 2 move relative to the connecting rod 1 in the same plane with their respective hinge points as the axis. The other end of the second support member 4 is fixedly connected to the bottom of the upper shell 5 of the float, forming a vertical structure. A bevel gear 17 is sleeved on the other end of the second support member 4 via a bearing. The bevel gear 17 meshes with a gear 151 mounted on the bottom of the upper shell 5 of the float via a bracket 153. The gear 152 is fixed on the base 153. The gears 151 and 152 mesh and transmit power. The gear 152 meshes and transmits power with the inner and outer gears 122. The inner and outer gears 123 are connected to the first transmission shaft 12. The gears 151, 152, and the fixed bracket 153 constitute the second transmission assembly.

[0042] The configuration of the first transmission assembly and the second transmission assembly is not limited to the structure given in the specific embodiments of the present invention, as long as they can function to transmit motion to the input shaft of the generator. Figure 6 As shown, the spiral impeller 7 has three spiral blades. The spiral impeller is vertically arranged on the outer side of the bottom of the upper housing 5 of the float. The input shaft of the spiral impeller 7 extends into the upper housing 5 of the float and is coaxially connected with the bevel gear 17.

[0043] like Figure 8 , Figure 9-a , Figure 9-bAs shown, the main shaft 12 is fixedly connected to the central gear 128 and sleeved together. A large gear 121 is also fixed on it. The first main shaft sleeve 125 is fixed to the planetary gear disk 127, and three identical planetary gears 126 are fixed on it. The second main shaft sleeve 124 is fixedly connected to the inner and outer gears 123. The inner and outer gears 123 mesh with gear 152 for transmission. Thus, the ratchet 114 inputs the up-and-down pulling wave energy, while the inner and outer gears 123 input the unidirectional rotational tidal energy of the helical impeller. Finally, these are coupled and output through the large gear 121, achieving a superimposed output of the two energies. When encountering large waves, the ballast tank 81 takes in water to increase its draft, effectively resisting wind and waves.

[0044] like Figure 10 From left to right, the unidirectional inputs are tidal energy and wave energy, and finally the large gear on the main shaft also outputs energy in one direction.

[0045] like Figure 11-a , Figure 11-b , Figure 11-c The following are several input scenarios. Figure 11-a Since there is no float and no up-and-down oscillation, only unidirectional tidal energy input drives the internal and external gears to rotate clockwise, and finally transmits it to the central gear for output through planetary gears. Figure 11-b Since the helical impeller is stationary, there is no tidal energy; only the wave-driven oscillation of the float provides input, and the rotation of the planetary gear disk drives the planetary gears, which in turn drive the central gear to rotate for output. Figure 11-c The system is equipped with both wave-driven float oscillation input and helical impeller rotation input. The planetary disk and inner and outer gears rotate in one direction, thereby driving the central gear to rotate clockwise.

[0046] The working process of this invention is as follows:

[0047] This invention is placed in the ocean. The cylindrical box is moored at sea or on the seabed by anchor chains, and the array of buoy power generation components floats on the sea surface. Under the force of waves, it swings up and down, driving the generator inside the box to generate electricity. One end of the connecting rod is fixed. Due to the force of waves and the vibration of the springs and vibrating blocks inside the buoy, the buoy power generation components will have a height difference in the horizontal waves. During the formation of the height difference, the buoy power generation components will be higher than the horizontal connecting rod. Similar to the lever principle, the buoy power generation components on this side will oscillate. The push rod will move upward, driving the first transmission shaft to rotate through the gear ring. The rotation is transmitted to the input end of the generator's outer rotor through the worm gear and the transmission belt, driving the outer rotor to rotate. During the descent, the buoy power generation components will oscillate due to gravity. At this time, the push rod will move downward, driving the first transmission shaft to rotate through the ratchet push rod. The rotation is transmitted to the input end of the generator's outer rotor through the worm gear and the first transmission belt, driving the generator to generate electricity. When the push rod reciprocates vertically, it drives the rotating rods to rotate. When the connecting rod moves downward, one rotating rod rotates counterclockwise while the other rotates clockwise. The pawl on the counterclockwise rotating rod pushes the ratchet to rotate counterclockwise, while the pawl on the clockwise rotating rod slides relative to the ratchet teeth and does not push the ratchet to rotate. Therefore, when the connecting rod moves downward, the ratchet rotates counterclockwise. When the connecting rod moves upward, the rotation direction of the two rotating rods is opposite to the direction of the connecting rod's upward movement, thus rotating counterclockwise. The rotating rod rotates clockwise. The pawl on the clockwise rotating rod slides relative to the ratchet teeth, preventing the ratchet from rotating. Conversely, the rotating rod that was originally clockwise rotates counter-clockwise. The pawl on the counter-clockwise rotating rod then drives the ratchet to rotate counter-clockwise. Therefore, the ratchet linkage assembly converts the reciprocating motion of the float into the unidirectional rotation of the main shaft. The ingenious aspect of the ratchet linkage assembly is that it transforms the up-and-down reciprocating motion of the float into a unidirectional counter-clockwise rotation, thus improving the stability of the generator. The float generator assembly moves through the heave inertia of the spring and the vibrating energy storage block. When the relative displacement of one float in the heave direction is small or large, the spring effectively stretches or compresses, increasing its relative height displacement, which amplifies the heave displacement motion of the float generator assembly. The large worm gear on the first transmission main shaft inside the float generator assembly also stores energy and amplifies the rotational speed. Simultaneously, each float is equipped with a speed-increasing component. This component, through internal gear meshing, increases the rotational speed at the generator input to four times its original speed, thus increasing the power generation efficiency by four times. Due to the design structure of the helical impeller, the helical blades will only rotate in one direction under the impact of ocean current. The ratio of the input to output gear radii of the second transmission component is 2:1.5 to increase the rotational speed. The ratio of the ratchet radius of the first transmission component to the output gear radius of the second transmission component is 1:0.9. In high-speed and high-load working environments, gears with more teeth need to be selected to improve operational stability. At the same time, the ratchet can effectively transmit torque from the main shaft to the input end of the generator's outer rotor to drive the generator to generate electricity.Simultaneously, the main shaft is fixedly connected to the central gear and sleeved together. A large gear is also fixed on it. The first main shaft sleeve is fixed together with the planetary gear disk, and three identical planetary gears are fixed on it. The second main shaft sleeve is fixedly connected to the inner and outer gears. The inner and outer gears mesh with each other for transmission. In this way, the ratchet inputs the up-and-down pulling wave energy, and the inner and outer gears input the unidirectional rotational tidal energy of the spiral impeller. Finally, the energy is coupled and output through the large gear, realizing the superposition and output of the two energies.

[0048] This invention employs a three-buoy power generation assembly that undergoes relative oscillating motion under wave force and unidirectional rotational motion under water flow force. This achieves coupled output of two types of marine energy from the three floats, as well as simultaneous oscillation power generation with the containerized power generation assembly, improving the device's stability and power generation efficiency. The float power generation assembly contains a first support member and a second support member. The first support member restricts the vertical oscillation motion of the connecting rod, while the second support member, through a connecting rod, increases the transmission efficiency of the float energy harvesting mechanism, allowing the engine to rotate continuously and generate electricity. The blades of the helical impeller are subjected to force perpendicular to the helical shaft, enabling good self-starting. The helical impeller always rotates in one direction, allowing the power mechanism to rotate repeatedly through the transmission mechanism, ensuring the generator's continuity. Each of the three floats has a large worm gear on its first transmission assembly. The vertical oscillation of the float drives the rotation of the large worm gear, which effectively stores energy and increases the main shaft's rotational speed, achieving continuous and efficient power generation. Each of the three floats has a wave-current coupling output mechanism, achieving a superimposed coupling output of the rotational force of the ocean current and the rotational force of the wave energy, realizing an energy "1+1=2", which saves costs compared to dual-motor power generation with dual acquisition and dual output, while improving stability. Each of the three floats adopts a parallel transmission mechanism, increasing the relative speed of the generator. Springs and vibration energy storage devices in the lower shell of the float can store energy through the vibration of the float and the rotation of the helical impeller, increasing the amplitude and improving the utilization rate of wave energy. Each of the three floats has a ratchet push rod assembly. The rotating lever, push rod, and connecting rod in the ratchet push rod assembly are connected by a rotating pair hinge, increasing the vertical oscillation stroke of the device without being limited by wave height. A single rotor generator is used inside the float, and the power output system is placed inside the float for easy maintenance and away from corrosive seawater, thereby improving the reliability and survivability of the equipment. The device's transmission system has a simple structure, high energy transfer efficiency, and stable energy output. The three array floats are arranged around a cylindrical box platform, which has stronger wind resistance than dual floats. At the same time, the bottom of the platform is a ballast tank, which improves stability in severe weather and extends service life.

[0049] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An offshore power generation platform considering wave-current coupling, characterized in that, include: Cylindrical box-type power generation components and float-type power generation components; The cylindrical box-shaped power generation assembly includes: three generators and a ballast chamber; the three generators generate electricity by swinging through a connecting rod. The float power generation component is arranged in a circumferential array around the cylindrical box via connecting rods; The connecting rod swings up and down via a pin fixed to the cylindrical box. The float power generation component includes: a spiral impeller, an energy storage spring, a vibration energy storage block, a ratchet push rod assembly, a speed-increasing assembly, a generator, a wave-current coupling assembly, and a transmission device; the ratchet push rod assembly collects wave energy to make the output shaft rotate in one direction, the spiral impeller collects tidal energy to make the output shaft rotate in one direction, and the wave-current coupling assembly couples the two unidirectional rotations together for output.

2. The offshore power generation platform considering wave-current coupling as described in claim 1, characterized in that: The cylindrical box-type power generation assembly includes: a connecting rod, a generator, a transmission rod, a pin, a ballast chamber, and a partition. The cylindrical tank is divided into upper and lower sealed parts by a partition. The upper part is equipped with a power generation device, and the lower part is a ballast tank. The transmission rod and the connecting rod are movably hinged. The connecting rod and the cylindrical tank are movably connected by a pin. The generator is pulled up and down with the waves to generate electricity. The generator is a bidirectional rotary generator that can be converted to a unidirectional rotary generator. The ballast tank can be adjusted according to the weather to allow ballast water to flow, thereby improving stability.

3. The offshore power generation platform considering wave-current coupling as described in claim 1, characterized in that: The float power generation assembly includes: an upper float housing, a lower float housing, and a spiral impeller; The upper and lower housings of the float are fixed together. The spiral impeller passes through the lower housing and enters the upper housing. The impeller blades are subjected to force perpendicular to the axis of rotation and rotate in one direction.

4. The offshore power generation platform considering wave-current coupling as described in claim 1, characterized in that: The upper shell of the float is provided with: a first support rod, a second support rod, a first transmission assembly, a second transmission assembly, a ratchet push rod assembly, a speed-increasing assembly, a generator, a push rod, and a wave-current coupling assembly; One end of the push rod is hinged to one end of the connecting rod via a revolute joint, and the other end of the push rod is hinged to the input end of the ratchet push rod via a revolute joint. The ratchet push rod assembly mainly consists of a push rod, a rotating rod, a ratchet, a pawl, a pressure plate, and a main shaft. The two push rods are rotatably connected to each other via pins, and the other end of the push rod is connected to the rotating rod via a pin. The rotating rod is mounted on the main shaft via bearings. The pawl and the pressure plate are respectively mounted on the other end of the rotating rod via pins. The ratchet push rod assembly is mounted on the main shaft via a flat key. A coil spring is installed between the pressure plate and the rotating rod to press the pawl onto the teeth of the ratchet. One end of the first support member is fixedly connected to the bottom surface of the float housing, and the other end is sleeved outside the push rod and slidably connected to the push rod. The second support member is vertically installed inside the upper housing of the float, and one end of the support member is fixedly connected to the bottom surface of the float housing. The system consists of a fixed connection, with the other end of the support member hinged to the connecting rod via a revolute joint; a push rod is arranged parallel to the first and second support members, and the push rod and the first support member move in the same direction of hinge; the gear of the ratchet push rod assembly is coaxial with the gear of the first transmission assembly; the output end of the first transmission assembly is connected to the input end of the speed-increasing assembly, and the output end of the speed-increasing assembly is connected to the input end of the generator; a float power generation assembly floats up and down with the waves, and one float power generation assembly makes a deep motion with the hinge point between the second support member and the connecting rod as the hinge point, driving the connecting rod at the same end and the push rod in the ratchet push rod assembly connected to the push rod to make up-and-down reciprocating motion, the ratchet of the ratchet push rod assembly drives the coaxial gear on the first transmission assembly to rotate in the same direction, and the first transmission assembly drives the input shaft of the generator to rotate and generate electricity.

5. The offshore power generation platform considering wave-current coupling as described in claim 3, characterized in that: The float power generation component also includes: a spiral impeller and a second transmission component; The output shaft of the spiral impeller penetrates the lower housing of the float and enters the upper housing of the float, engaging with the input rack of the second transmission component. The output gear of the second transmission component engages with the gear on the main shaft of the first transmission component, and the first transmission component drives the input shaft of the generator to rotate and generate electricity.

6. The offshore power generation platform considering wave-current coupling as described in claim 1, characterized in that: The lower housing of the float power generation component includes an energy storage spring and a vibrating energy storage block. The energy storage spring has a stiffness coefficient of approximately 1000 N / m, and the vibrating energy storage block has a mass of approximately 95 kg, which can improve power generation efficiency.

7. The offshore power generation platform considering wave-current coupling as described in claim 1, characterized in that: The speed-increasing component inside the upper shell of the float achieves bipolar speed increase, increasing the power generation speed by 4 times.

8. The offshore power generation platform considering wave-current coupling as described in claim 1, characterized in that: The float is connected to the cylindrical box via a connecting rod. The ratio between the three contact points of the connecting rod is 1:2, which can fully absorb wave energy and improve power generation efficiency.

9. The offshore power generation platform considering wave-current coupling as described in claim 1, characterized in that: The wave-current coupling component includes: a planetary helical gear, a planetary disk, a central gear, and internal and external double gears; Three planetary helical gears are fixed on the planetary disk by bearings. The central gear meshes with the three planetary helical gears for transmission. The planetary helical gears mesh with the inner and outer double gears for transmission.

10. The offshore power generation platform considering wave-current coupling as described in claim 1, characterized in that: The wave-current coupling component can couple the rotation of the main shaft driven by tidal energy with the rotation of the main shaft driven by wave energy to achieve superimposed force output.

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