Ocean energy coupling power generation device based on wave and ocean current driving

Abstract

The invention relates to an ocean energy coupling power generation device based on wave and ocean current driving, and belongs to the technical field of ocean energy power generation. Comprising a floating body, a permanent magnet generator assembly, a magnetic coupler, an ocean current energy water turbine and a wave energy water turbine. The floating body adopts a static sealing structure and floats on the sea surface; the permanent magnet generator assembly is installed in the floating body. The magnetic coupler enables the ocean current energy water turbine rotating shaft and the wave energy water turbine rotating shaft to be in coupling transmission with the permanent magnet generator stator and the permanent magnet generator rotor through magnets. The ocean current energy water turbine is mounted below the floating body; the wave energy water turbine is mounted below the ocean current energy water turbine; the ocean current energy water turbine and the wave energy water turbine rotate in opposite directions. The device has the advantages that the device is of an integrated structure, wave energy and ocean current energy are captured at the same time, a unique ocean current energy water turbine and wave energy water turbine contra-rotating structure is adopted for providing the speed increasing function for the permanent magnet generator, the sealing performance of generator assemblies is ensured through magnetic coupling transmission, installation and maintenance are convenient, and reliability and power generation efficiency are high.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean energy power generation, and in particular to an ocean energy coupling power generation device driven by waves and ocean currents. Background Art

[0002] With the rapid development of the global economy, energy demand continues to grow. Traditional fossil energy is facing problems such as resource shortage and environmental pollution. Marine energy, as an important part of clean energy, has gradually become an important direction for the development of renewable energy. In the marine environment, waves and currents, as two main forms of natural energy, have different dynamic characteristics and development potential.

[0003] Wave energy generation is achieved by capturing the kinetic and potential energy of waves on the ocean surface. Existing wave energy capture devices include point absorption type, oscillating water column type, overriding type, etc. These devices usually form oscillation, swaying or rotational motion of the energy-harvesting components under the action of the ups and downs of waves, and then generate electricity through generators. The efficiency of wave energy capture is greatly affected by changes in sea conditions and has a certain degree of volatility. Ocean current energy generation is similar to the principles of wind power generation and hydropower generation, which uses flowing seawater to drive turbines to generate electricity. Existing ocean current energy generation devices mainly include horizontal axis type and vertical axis type. At present, ocean current energy generation still has a series of key technical problems, such as difficult installation and maintenance, high corrosion protection requirements, and great influence of load and safety performance in the marine environment. In addition, the energy utilization rate of low-speed water flow, which accounts for the largest proportion and the widest frequency range in the ocean current energy spectrum, is low.

[0004] Coupling wave energy and ocean current energy for integrated power generation can make full use of various energy sources in the ocean, improve energy utilization efficiency, and reduce power generation costs. Wave energy and ocean current energy have certain complementarity in time and space. For example, when wave energy is weak, ocean current energy may be strong, and vice versa. Through integrated power generation devices, the coordinated utilization of the two energy sources can be achieved to improve power generation efficiency and stability. In addition, integrated power generation can also reduce the footprint of offshore facilities and reduce the impact on the marine environment.

[0005] CN110541783A discloses a floating breakwater-ocean energy device integrated system, which utilizes wave energy and ocean current energy to generate electricity through a wave power generation system on the upper wave-facing side of the floating breakwater and a lower ocean current power generation system; the system is a simple combination of two independent power generation systems, and needs to rely on the floating breakwater, and the construction cost is relatively high. CN118423222A discloses a wave-current integrated power generation device, which utilizes an axial flow turbine and a centrifugal turbine to capture wave energy and tidal energy, and adopts a coaxial structure to drive a direct-drive generator, thereby realizing the integration of the two energies; the device drives the same generator shaft with two turbines at the same time, and has problems such as low energy utilization efficiency and complex structure. CN104863787A discloses a wave-current coupled power generation device, which utilizes tidal energy and wave energy to drive the same turbine through a tidal current deflector and a wave deflector, and then drives the generator to generate electricity, thereby realizing the simultaneous utilization of tidal energy and wave energy; the device has problems such as device convection under the action of reciprocating tidal current and collision loss of the two energies during the diversion process. CN117418982A discloses a power generation device for ocean wave energy and ocean current energy, which uses a special piezoelectric fiber composite material MFC placed on the connecting rod at the outlet end of the flow channel as a power generation device; the device mainly uses ocean current energy to generate electricity, does not reflect the direct use of wave energy, and has problems such as low power generation level and power generation efficiency. CN111502899A discloses an ocean energy wave and current integrated power generation device, which uses wave energy and tidal energy to generate electricity through an upper wave power generation system and a lower tidal power generation system on an outer frame fixed to a platform such as a dock, buoy, or ship; the device is a simple combination of two independent power generation systems, and the power generation power is limited by the platform it is carried on. In general, the common problem of the above patents is that the wave energy and ocean current energy capture device is not effectively combined with an efficient direct-drive permanent magnet generator, the multi-energy coupling is weak, and the power generation efficiency is low.

[0006] Existing wave-current integrated power generation devices usually just stack wave power generation devices and tidal power generation devices, and do not effectively solve the problems of multi-energy coupling utilization and low energy conversion efficiency. Another technical solution uses new materials for energy conversion, but this method faces high material costs, and the performance of the materials may be affected by marine environmental factors, thereby reducing the long-term stability of the device. Summary of the invention

[0007] The purpose of the present invention is to provide an ocean energy coupling power generation device based on wave and current drive, which solves the problems of weak multi-energy coupling, low energy conversion efficiency, complex structure and poor reliability in existing ocean energy integrated power generation devices. The present invention provides a speed-increasing function for a direct-drive permanent magnet generator through a unique counter-rotating structure design of ocean current energy turbine and wave energy turbine, and adopts a static sealing structure to significantly improve the sealing of core components. It has the characteristics of strong multi-energy coupling, high energy conversion efficiency, simple structure, convenient maintenance and high reliability.

[0008] The above-mentioned object of the present invention is achieved by the following technical solutions: The ocean energy coupling power generation device based on wave and ocean current drive comprises a floating body 1, a permanent magnet generator assembly 2, a magnetic coupler 3, an ocean current energy turbine 4, and a wave energy turbine 5; the floating body 1 adopts a static sealing structure, floats on the sea surface to provide the required buoyancy and moves with the waves; the permanent magnet generator assembly 2 is installed inside the floating body to convert the rotational mechanical energy into electrical energy; the magnetic coupler 3 couples the rotating shaft of the ocean current energy turbine 4 and the rotating shaft of the wave energy turbine 5 with the stator and the rotor of the permanent magnet generator assembly 2 respectively through magnets; the ocean current energy turbine 4 is installed below the floating body 1; the wave energy turbine 5 is installed below the ocean current energy turbine 4; the ocean current energy turbine 4 and the wave energy turbine 5 rotate in opposite directions. The floating body 1 is coupled and connected with the ocean current energy turbine 4 and the wave energy turbine 5 through the magnetic coupler 3 to form an integrated power generation device.

[0009] Furthermore, the floating body 1 comprises a floating body cover 101, a floating body base 102, and a floating body bearing connection structure 103; the floating body 1 as a whole adopts a composite structure of a hollow inner cavity and a dome outer shell; the floating body cover 101 is fixedly connected to the flange structure of the floating body base 102 by bolts through a flange structure; a permanent magnet generator assembly 2 is fixedly installed in the floating body base 102; the floating body bearing connection structure 103 is fixedly installed below the center of the floating body base 102; after the overall assembly, it is located The ocean current water turbine 4 with passive variable angle blades 403 under the floating body 1 rotates under the action of ocean current energy, and the wave water turbine 5 with adaptive variable pitch blades 504 located below the ocean current water turbine 4 rotates in the opposite direction to the ocean current water turbine under the action of wave energy. Through the magnetic coupling method of the magnetic coupler 3, the rotational kinetic energy of the ocean current water turbine 4 and the wave water turbine 5 is respectively transmitted to the stator and mover of the permanent magnet generator 205, thereby converting mechanical energy into electrical energy.

[0010] Furthermore, the permanent magnet generator assembly 2 includes a conductive slip ring 201, a generator assembly fixing plate 202, a generator assembly support rod 203, a conductive slip ring connecting plate 204, a permanent magnet generator 205, a generator stator connecting plate 206, and a coupling 207; the stator of the conductive slip ring 201 is connected to the generator assembly fixing plate 202 by a fixed connection method; the generator assembly fixing plate 202 is fixedly connected to the floating base 102 through the generator assembly support rod 203; the conductive slip ring connecting plate 204 fixes the conductive slip ring 201 rotor to the stator shell of the permanent magnet generator 205; the permanent magnet generator 205 rotates and generates electricity under the coupling drive of the magnetic coupler 3; the generator stator connecting plate 206 is fixedly connected to the stator shell of the permanent magnet generator 205 and the upper outer magnetic pole 301 of the magnetic coupler 3 through a connecting rod; the coupling 207 is used to fix the rotor of the permanent magnet generator 205 to the upper inner magnetic pole 302 of the magnetic coupler 3.

[0011] Furthermore, the magnetic coupler 3 includes an upper outer magnetic pole 301, an upper inner magnetic pole 302, a lower outer magnetic pole 303, a lower inner magnetic pole 304, and an embedded ball limit plate 305; the upper outer magnetic pole 301 is fixedly connected to the stator shell of the permanent magnet generator 205 inside the float 1 through a connecting rod; the upper inner magnetic pole 302 is fixedly connected to the rotor of the permanent magnet generator 205 inside the float 1 through a coupling 207; the lower outer magnetic pole 303 is fixedly connected to the ocean current energy turbine support shaft 401 in the float bearing connection structure 103; the lower inner magnetic pole 304 is fixedly connected to the wave energy turbine support shaft 501 in the float bearing connection structure 103; the embedded ball limit plate 305 is used to limit the gap of the magnetic coupler 3.

[0012] Furthermore, the ocean current energy turbine 4 includes an ocean current energy turbine support shaft 401, an ocean current energy turbine blade connecting rod 402, and a passive variable deflection blade 403; the ocean current energy turbine support shaft 401 is a hollow structure, and its fixed end is fixedly connected to the lower outer magnetic pole 303 of the magnetic coupler 3, and is bearing-matched with the inside of the floating bearing connection structure 103; one end of the ocean current energy turbine blade connecting rod 402 is connected to the passive variable deflection blade 403, and the other end is fixedly connected to the ocean current energy turbine support shaft 401; the passive variable deflection blade 403 is a symmetrical airfoil straight blade, and is symmetrically fixedly connected along the middle through two ocean current energy turbine blade connecting rods 402; three passive variable deflection blades 403 are evenly installed around the ocean current energy turbine support shaft 401 in the circumferential direction to realize the rotation of the ocean current energy turbine 4 in the same direction perpendicular to the sea level.

[0013] Furthermore, the wave energy turbine 5 includes a wave energy turbine support shaft 501, a wave energy turbine fairing 502, a wave energy turbine hub 503, and an adaptive variable pitch blade 504; the wave energy turbine support shaft 501 passes through the ocean current energy turbine support shaft 401 and is fixedly connected to the lower inner magnetic pole 304 of the magnetic coupler 3 and is fixedly connected to the internal bearing of the ocean current energy turbine support shaft 401 through a bearing; the wave energy turbine fairing 502 is fixedly installed on both sides of the wave energy turbine hub 503; three adaptive variable pitch blades 504 are evenly installed along the circumference of the wave energy turbine hub 503 to realize that the wave energy turbine 5 rotates parallel to the sea level in the opposite direction to the rotation of the ocean current energy turbine.

[0014] Another object of the present invention is to provide an installation method for an ocean energy coupling power generation device driven by waves and ocean currents. The assembly process can be divided into four parts: installation of a floating body, installation of a permanent magnet generator assembly, installation of an ocean current energy turbine, and installation of a wave energy turbine. First, the permanent magnet generator assembly 2 is fixedly installed inside the floating body 1 through the generator assembly fixing plate 202 and the generator assembly support rod 203; after the permanent magnet generator assembly 2 is fixed, a static sealing installation is implemented to ensure that the floating body upper cover 101 and the floating body base 102 are sealed and connected; after the floating body assembly is sealed and installed, the wave energy turbine 5 and the ocean current energy turbine 4 are pre-assembled respectively; then, the wave energy turbine support shaft 501 passes through the hollow ocean current energy turbine support shaft 401, and is installed in conjunction with it through bearings; The lower inner magnetic pole 304 of the magnetic coupler 3 is fixedly connected to the wave energy turbine support shaft 501; after the wave energy turbine 5 is installed, the outer side of the ocean current energy turbine support shaft 401 is inserted into the floating bearing connection structure 103, and the bearing is matched to ensure that the ocean current energy turbine support shaft 401 is fixedly connected to the lower outer magnetic pole 303 of the magnetic coupler 3; finally, the floating bearing connection structure 103 is fixedly connected to the floating base 102 by bolts to ensure the stable connection of all components and complete the assembly of the entire device.

[0015] The present invention couples wave energy and ocean current energy through an innovative integrated design of wave energy turbine and ocean current turbine, drives an efficient direct-drive permanent magnet generator, and can simultaneously capture wave energy and ocean current energy in a wide spectrum range for power generation, with the characteristics of flexible deployment and strong versatility. The present invention adopts a unique counter-rotating structure design of ocean current energy turbine and wave energy turbine, which can provide a speed-increasing function for the direct-drive permanent magnet generator without the need for a special speed increaser, thereby improving the power generation power and efficiency of the generator. In addition, the present invention also uses a magnetic coupler to make the permanent magnet generator assembly work completely in the sealing structure inside the float, which plays a protective and supporting role. This structure effectively avoids damage to the permanent magnet generator assembly in harsh marine environments and improves the reliability and stability of the device. It is flexible and convenient in terms of deployment, installation and maintenance, which can effectively improve the versatility of the power generation device and significantly reduce costs.

[0016] The beneficial effects of the present invention are: 1. The ocean energy coupling power generation device driven by waves and ocean currents of the present invention is composed of simple components and has the advantages of simple structure, easy deployment, installation and maintenance.

[0017] 2. The present invention is an ocean energy coupling power generation device driven by waves and currents, and adopts a unique counter-rotating structure design of ocean current energy turbines and wave energy turbines. Without relying on a special speed increaser, it can increase the speed of the generator, thereby improving the power generation efficiency of the generator.

[0018] 3. The present invention is based on an ocean energy coupling power generation device driven by waves and currents. The permanent magnet generator assembly is completely encapsulated in a sealed structure inside the float through a magnetic coupler to provide protection and support, thereby improving the reliability of the generator assembly.

[0019] 4. The present invention is an ocean energy coupling power generation device driven by waves and ocean currents. The ocean current energy turbine adopts a vertical axis passive variable deflection blade structure to enhance the self-starting ability of the ocean current energy turbine and improve the energy capture efficiency.

[0020] 5. The present invention is based on an ocean energy coupling power generation device driven by waves and ocean currents. The wave energy turbine adopts an adaptive variable pitch blade design to ensure that the generator direction remains unchanged, thereby improving the starting efficiency and energy capture efficiency of the wave energy turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present invention and constitute a part of this application. The illustrative examples of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1It is a schematic structural diagram of the ocean energy coupling power generation device based on wave and ocean current drive of the present invention; Figure 2 It is a schematic structural diagram of the application of the ocean energy coupling power generation device based on wave and ocean current drive of the present invention; Figure 3 It is a structural schematic diagram of the floating body of the present invention; Figure 4 It is a structural schematic diagram of the permanent magnet generator assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the magnetic coupler of the present invention; Figure 6 is a schematic cross-sectional structural diagram of a magnetic coupler of the present invention; Figure 7 It is a structural schematic diagram of the ocean current energy turbine of the present invention; Figure 8 It is a schematic structural diagram of the wave energy turbine of the present invention.

[0023] In the figure: 1, floating body; 2, permanent magnet generator assembly; 3, magnetic coupler; 4, ocean current energy turbine; 5, wave energy turbine; 101, floating body cover; 102, floating body base; 103, floating body bearing connection structure; 201, conductive slip ring; 202, generator assembly fixing plate; 203, generator assembly support rod; 204, conductive slip ring connection plate; 205, permanent magnet generator; 206, generator stator connection plate; 207, connection Shaft; 301, upper outer magnetic pole; 302, upper inner magnetic pole; 303, lower outer magnetic pole; 304, lower inner magnetic pole; 305, embedded ball limit plate; 401, ocean current energy turbine support shaft; 402, ocean current energy turbine blade connecting rod; 403, passive variable deflection blade; 501, wave energy turbine support shaft; 502, wave energy turbine fairing; 503, wave energy turbine hub; 504, adaptive variable pitch blade. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] See also Figures 1 to 8As shown, the novel wave- and current-driven ocean energy efficient coupled power generation device of the present invention integrates wave energy power generation and ocean current energy power generation into an integrated design, captures wave energy and ocean current energy at the same time, utilizes magnetic coupling transmission to ensure the sealing of the generator assembly, and adopts a unique ocean current energy turbine and wave energy turbine counter-rotating structure design to provide a speed increase function for the direct-drive permanent magnet generator. The modular design structure is easy to install and maintain, effectively improving the reliability and power generation efficiency of the power generation device.

[0026] See also Figure 1 and Figure 2 As shown, the ocean energy coupling power generation device based on wave and ocean current drive of the present invention comprises a floating body 1, a permanent magnet generator assembly 2, a magnetic coupler 3, an ocean current energy turbine 4, and a wave energy turbine 5; the floating body 1 adopts a static sealing structure, floats on the sea surface to provide the required buoyancy and moves with the waves; the permanent magnet generator assembly 2 is installed inside the floating body to convert the rotational mechanical energy into electrical energy; the magnetic coupler 3 couples the rotating shaft of the ocean current energy turbine 4 and the rotating shaft of the wave energy turbine 5 with the stator and the rotor of the permanent magnet generator assembly 2 respectively through magnets; the ocean current energy turbine 4 is installed below the floating body 1; the wave energy turbine 5 is installed below the ocean current energy turbine 4; the ocean current energy turbine 4 and the wave energy turbine 5 rotate in opposite directions. The floating body 1 is coupled and connected with the ocean current energy turbine 4 and the wave energy turbine 5 through the magnetic coupler 3 to form an integrated power generation device.

[0027] See also Figure 3 As shown, the floating body 1 of the present invention comprises a floating body cover 101, a floating body base 102, and a floating body bearing connection structure 103; the floating body 1 as a whole adopts a composite structure of a hollow inner cavity and a dome outer shell; the floating body cover 101 is fixedly connected to the flange structure of the floating body base 102 by bolts through a flange structure; the permanent magnet generator assembly 2 is fixedly installed in the floating body base 102; the floating body bearing connection structure 103 is fixedly installed below the center of the floating body base 102; after the overall assembly, the position The ocean current water turbine 4 with passive variable angle blades 403 below the floating body 1 rotates under the action of ocean current energy, and the wave water turbine 5 with adaptive variable pitch blades 504 below the ocean current water turbine 4 rotates in the opposite direction to the ocean current water turbine under the action of wave energy. Through the magnetic coupling method of the magnetic coupler 3, the rotational kinetic energy of the ocean current water turbine 4 and the wave water turbine 5 is respectively transmitted to the stator and the mover of the permanent magnet generator 205, thereby converting mechanical energy into electrical energy.

[0028] See also Figure 4As shown, the permanent magnet generator assembly 2 of the present invention comprises a conductive slip ring 201, a generator assembly fixing plate 202, a generator assembly support rod 203, a conductive slip ring connecting plate 204, a permanent magnet generator 205, a generator stator connecting plate 206, and a coupling 207; the stator of the conductive slip ring 201 is connected to the generator assembly fixing plate 202 by a fixed connection method; the generator assembly fixing plate 202 is fixedly connected to the floating body base 102 through the generator assembly support rod 203; the conductive slip ring connecting plate 204 fixes the conductive slip ring 201 rotor to the stator shell of the permanent magnet generator 205; the permanent magnet generator 205 rotates and generates electricity under the coupling drive of the magnetic coupler 3; the generator stator connecting plate 206 is fixedly connected to the stator shell of the permanent magnet generator 205 and the upper outer magnetic pole 301 of the magnetic coupler 3 through the connecting rod; the coupling 207 is used to fix the rotor of the permanent magnet generator 205 to the upper inner magnetic pole 302 of the magnetic coupler 3.

[0029] See also Figure 5 and Figure 6 As shown, the magnetic coupler 3 described in the present invention includes an upper outer magnetic pole 301, an upper inner magnetic pole 302, a lower outer magnetic pole 303, a lower inner magnetic pole 304, and an embedded ball limit plate 305; the upper outer magnetic pole 301 is fixedly connected to the stator shell of the permanent magnet generator 205 inside the floating body 1 through a connecting rod; the upper inner magnetic pole 302 is fixedly connected to the rotor of the permanent magnet generator 205 inside the floating body 1 through a coupling 207; the lower outer magnetic pole 303 is fixedly connected to the ocean current energy turbine support shaft 401 in the floating body bearing connection structure 103; the lower inner magnetic pole 304 is fixedly connected to the wave energy turbine support shaft 501 in the floating body bearing connection structure 103; the embedded ball limit plate 305 is used to limit the gap of the magnetic coupler 3.

[0030] See also Figure 7 As shown, the ocean current energy turbine 4 described in the present invention includes an ocean current energy turbine support shaft 401, an ocean current energy turbine blade connecting rod 402, and a passive variable deflection blade 403; the ocean current energy turbine support shaft 401 is a hollow structure, and its fixed end is fixedly connected to the lower outer magnetic pole 303 of the magnetic coupler 3, and is bearing-matched with the inside of the floating bearing connection structure 103; one end of the ocean current energy turbine blade connecting rod 402 is connected to the passive variable deflection blade 403, and the other end is fixedly connected to the ocean current energy turbine support shaft 401; the passive variable deflection blade 403 is a symmetrical airfoil straight blade, and is symmetrically fixedly connected along the middle through two ocean current energy turbine blade connecting rods 402; three passive variable deflection blades 403 are evenly installed around the ocean current energy turbine support shaft 401 in the circumferential direction to realize the rotation of the ocean current energy turbine 4 in the same direction perpendicular to the sea level.

[0031] See also Figure 8 As shown, the wave energy turbine 5 described in the present invention includes a wave energy turbine support shaft 501, a wave energy turbine shroud 502, a wave energy turbine hub 503, and an adaptive variable pitch blade 504; the wave energy turbine support shaft 501 passes through the ocean current energy turbine support shaft 401 and is fixedly connected to the lower inner magnetic pole 304 of the magnetic coupler 3 and is fixedly connected to the inner bearing of the ocean current energy turbine support shaft 401 through a bearing; the wave energy turbine shroud 502 is fixedly installed on both sides of the wave energy turbine hub 503 respectively; three adaptive variable pitch blades 504 are evenly installed along the circumference of the wave energy turbine hub 503, so as to realize that the wave energy turbine 5 rotates parallel to the sea level in the opposite direction to the rotation of the ocean current energy turbine.

[0032] See also Figures 1 to 8 As shown, the working principle and working process of the present invention are as follows: The present invention needs to be assembled before use, and the device assembly process can be divided into four parts: installation of the floating body, installation of the permanent magnet generator assembly, installation of the ocean current energy turbine and installation of the wave energy turbine; Figure 1 As shown, first, the permanent magnet generator assembly 2 is fixedly installed inside the floating body 1 through the generator assembly fixing plate 202 and the generator assembly support rod 203; after the permanent magnet generator assembly 2 is fixed, static sealing installation is implemented to ensure that the floating body upper cover 101 and the floating body base 102 are sealed and connected; after the floating body assembly is sealed and installed, the wave energy turbine 5 and the ocean current energy turbine 4 are pre-assembled respectively; then, the wave energy turbine support shaft 501 passes through the hollow ocean current energy turbine support shaft 401, and is installed in conjunction with it through the bearing ; The lower inner magnetic pole 304 of the magnetic coupler 3 is fixedly connected to the wave energy turbine support shaft 501; after the wave energy turbine 5 is installed, the outer side of the ocean current energy turbine support shaft 401 is inserted into the floating bearing connection structure 103, and the bearing is matched to ensure that the ocean current energy turbine support shaft 401 is fixedly connected to the lower outer magnetic pole 303 of the magnetic coupler 3; finally, the floating bearing connection structure 103 is fixedly connected to the floating base 102 by bolts to ensure the stable connection of all components and complete the assembly of the entire device.

[0033] When the present invention is working, the whole device floats on the sea surface by buoyancy, wherein a part of the floating body 1 is located above the water surface, and the ocean current energy turbine 4 and the wave energy turbine 5 are located below the water surface. The ocean current energy turbine 4 located at the lower layer of the floating body rotates under the action of ocean current energy, and drives the generator stator to rotate through the magnetic coupler 3. The wave energy turbine 5 located at the bottom layer rotates in the opposite direction relative to the ocean current energy turbine 4 under the drive of waves, and drives the generator rotor to rotate in the opposite direction relative to the generator stator through the magnetic coupler 3. The unique counter-rotating structure design of the ocean current energy turbine 4 and the wave energy turbine 5 provides a speed-increasing function for the direct-drive permanent magnet generator, thereby improving the power generation efficiency of the overall device.

[0034] Existing wave-current integrated power generation devices usually just stack wave power generation devices and tidal power generation devices, and do not effectively solve the problems of multi-energy coupling utilization and low energy conversion efficiency. Another technical solution uses new materials for energy conversion, but this method faces high material costs, and the performance of the materials may be affected by marine environmental factors, thereby reducing the long-term stability of the device.

[0035] The present invention couples wave energy and ocean current energy through an innovative integrated design of wave energy turbine and ocean current turbine, drives an efficient direct-drive permanent magnet generator, and can simultaneously capture wave energy and ocean current energy in a wide spectrum range for power generation, with the characteristics of flexible deployment and strong versatility. The present invention adopts a unique counter-rotating structure design of ocean current energy turbine and wave energy turbine, which can provide a speed-increasing function for the direct-drive permanent magnet generator without the need for a special speed increaser, thereby improving the power generation power and efficiency of the generator. In addition, the present invention also uses a magnetic coupler to make the permanent magnet generator assembly work completely in the sealing structure inside the float, which plays a protective and supporting role. This structure effectively avoids damage to the permanent magnet generator assembly in harsh marine environments and improves the reliability and stability of the device. It is flexible and convenient in terms of deployment, installation and maintenance, which can effectively improve the versatility of the power generation device and significantly reduce costs.

[0036] The ocean current energy turbine of the present invention is different from the traditional ocean current energy power generation device. The tidal energy blades of the ocean current energy turbine adopt a vertical axis passive variable deflection blade structure, which directly realizes the change of blade deflection angle by means of fluid power. This design not only enhances the self-starting ability of the blades, but also greatly improves the energy capture efficiency.

[0037] The wave energy turbine of the present invention is also different from the traditional wave energy power generation device. The blades of the wave energy turbine adopt a swept adaptive variable pitch blade design, which can automatically adjust the blade pitch through the wave movement, thereby realizing the passive variable pitch function. This design effectively improves the variable pitch efficiency of the turbine under the action of waves and improves the energy capture efficiency.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made to the present invention shall be included in the protection scope of the present invention.

Claims

1. An ocean energy coupling power generation device based on wave and current drive, characterized in that: The invention comprises a floating body (1), a permanent magnet generator assembly (2), a magnetic coupling (3), a sea current water turbine (4), and a wave water turbine (5); the floating body (1) adopts a static sealing structure, floats on the sea surface to provide the required buoyancy and moves with the waves; the permanent magnet generator assembly (2) is installed inside the floating body (1) to convert the rotational mechanical energy into electrical energy; the magnetic coupling (3) couples the rotating shaft of the sea current water turbine (4) and the rotating shaft of the wave water turbine (5) with the stator and the rotor of the permanent magnet generator assembly (2) respectively through magnets for transmission; the sea current water turbine (4) is installed below the floating body (1), and the wave water turbine (5) is installed below the sea current water turbine (4), and the sea current water turbine (4) and the wave water turbine (5) rotate in opposite directions; the floating body (1) is coupled and connected with the sea current water turbine (4) and the wave water turbine (5) through the magnetic coupling (3) to form a whole, thereby forming an integrated power generation device.

2. The wave and current driven ocean energy coupling power generation device according to claim 1, characterized in that: The floating body (1) comprises a floating body cover (101), a floating body base (102), and a floating body bearing connection structure (103). The floating body (1) as a whole adopts a composite structure of a hollow inner cavity and a dome outer shell. The floating body cover (101) is fixedly connected to the flange structure of the floating body base (102) by bolts through a flange structure. The permanent magnet generator assembly (2) is fixedly installed in the floating body base (102); the floating body bearing connection structure (103) is fixedly installed below the center of the floating body base (102); after the overall assembly, the floating body (1) is located The ocean current water turbine (4) with passive variable angle blades (403) below rotates under the action of ocean current energy, and the wave energy water turbine (5) with adaptive variable pitch blades (504) located below the ocean current water turbine (4) rotates in the opposite direction to the ocean current water turbine under the action of wave energy. The rotational kinetic energy of the ocean current water turbine (4) and the wave energy water turbine (5) is respectively transmitted to the stator and mover of the permanent magnet generator (205) through the magnetic coupling method of the magnetic coupler (3), thereby converting mechanical energy into electrical energy.

3. The wave and current driven ocean energy coupling power generation device according to claim 1, characterized in that: The permanent magnet generator assembly (2) comprises a conductive slip ring (201), a generator assembly fixing plate (202), a generator assembly support rod (203), a conductive slip ring connecting plate (204), a permanent magnet generator (205), a generator stator connecting plate (206), and a coupling (207); the stator of the conductive slip ring (201) is fixedly connected to the generator assembly fixing plate (202), and the generator assembly fixing plate (202) is fixedly connected to the floating body base (102) via the generator assembly support rod (203); the conductive slip ring (201) is fixedly connected to the generator assembly fixing plate (202), and the conductive slip ring (201) is fixedly connected to the floating body base (102) via the generator assembly support rod (203); The ring connecting plate (204) fixedly connects the rotor of the conductive slip ring (201) and the stator shell of the permanent magnet generator (205); the permanent magnet generator (205) rotates and generates electricity under the coupling drive of the magnetic coupler (3); the generator stator connecting plate (206) is fixedly connected to the stator shell of the permanent magnet generator (205) and the upper outer magnetic pole (301) of the magnetic coupler (3) through a connecting rod; the coupling (207) fixedly connects the rotor of the permanent magnet generator (205) and the upper inner magnetic pole (302) of the magnetic coupler (3).

4. The wave- and current-driven ocean energy coupling power generation device according to claim 1, characterized in that: The magnetic coupler (3) comprises an upper outer magnetic pole (301), an upper inner magnetic pole (302), a lower outer magnetic pole (303), a lower inner magnetic pole (304), and an embedded ball stop plate (305); the upper outer magnetic pole (301) is fixedly connected to the stator shell of the permanent magnet generator (205) inside the floating body (1) through a connecting rod, and the upper inner magnetic pole (302) is fixedly connected to the rotor of the permanent magnet generator (205) inside the floating body (1) through a coupling (207); the lower outer magnetic pole (303) is fixedly connected to the support shaft (401) of the ocean current energy turbine in the floating body bearing connection structure (103), and the lower inner magnetic pole (304) is fixedly connected to the support shaft (501) of the wave energy turbine in the floating body bearing connection structure (103); and the embedded ball stop plate (305) performs gap limiting on the magnetic coupler (3).

5. The wave- and current-driven ocean energy coupling power generation device according to claim 1 is characterized in that: The ocean current energy turbine (4) comprises an ocean current energy turbine support shaft (401), an ocean current energy turbine blade connecting rod (402), and a passive variable angle blade (403); the ocean current energy turbine support shaft (401) is a hollow structure, a fixed end of which is fixedly connected to the lower outer magnetic pole (303) of the magnetic coupler (3), and is bearing-matchedly connected to the inside of the floating bearing connecting structure (103); the ocean current energy turbine blade connecting rod (402) is a hollow structure, a fixed end of which is fixedly connected to the lower outer magnetic pole (303) of the magnetic coupler (3), and is bearing-matchedly connected to the inside of the floating bearing connecting structure (103); One end is connected to a passive variable angle blade (403), and the other end is fixedly connected to a sea current energy turbine support shaft (401); the passive variable angle blade (403) is a symmetrical airfoil straight blade, and is symmetrically fixedly connected along the middle through two sea current energy turbine blade connecting rods (402); three passive variable angle blades (403) are evenly installed around the sea current energy turbine support shaft (401) in the circumferential direction, so as to realize the sea current energy turbine (4) rotating in the same direction perpendicular to the sea level.

6. The wave- and current-driven ocean energy coupling power generation device according to claim 1 is characterized in that: The wave energy turbine (5) comprises a wave energy turbine support shaft (501), a wave energy turbine shroud (502), a wave energy turbine hub (503), and adaptive variable pitch blades (504); the wave energy turbine support shaft (501) passes through the ocean current turbine support shaft (401) and is fixedly connected to the lower inner magnetic pole (304) of the magnetic coupler (3), and is fixedly connected to the inner bearing of the ocean current turbine support shaft (401) through a bearing; the wave energy turbine shroud (502) is fixedly installed on both sides of the wave energy turbine hub (503); three adaptive variable pitch blades (504) are evenly installed along the circumference of the wave energy turbine hub (503) to realize that the wave energy turbine (5) rotates parallel to the sea level in the opposite direction to the rotation of the ocean current turbine.

7. The method for installing a wave- and current-driven ocean energy coupling power generation device according to any one of claims 1 to 6, characterized in that: First, the permanent magnet generator assembly (2) is fixedly installed inside the floating body (1) through the generator assembly fixing plate (202) and the generator assembly support rod (203); after the permanent magnet generator assembly (2) is fixed, static sealing installation is performed to ensure that the floating body upper cover (101) and the floating body base (102) are sealed and connected; after the floating body assembly is sealed and installed, the wave energy turbine (5) and the ocean current energy turbine (4) are pre-assembled respectively; then, the wave energy turbine support shaft (501) passes through the hollow ocean current energy turbine support shaft (401) and is connected thereto through the bearing. The wave energy turbine (5) is installed by fitting together; the lower inner magnetic pole (304) of the magnetic coupler (3) is fixedly connected to the wave energy turbine support shaft (501); after the wave energy turbine (5) is installed, the outer side of the ocean current energy turbine support shaft (401) is inserted into the floating body bearing connection structure (103), and the ocean current energy turbine support shaft (401) is fixedly connected to the lower outer magnetic pole (303) of the magnetic coupler (3) through the bearing fitting; finally, the floating body bearing connection structure (103) is fixedly connected to the floating body base (102) through bolts, thereby completing the assembly of the entire device.

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