Near-shore wave energy focusing-wave-to-current combined power generation wave absorbing device

Abstract

The invention discloses a near-shore wave energy focusing-wave-to-current combined power generation wave absorbing device. The wave power generation device belongs to the technical field of ocean engineering wave power generation and is composed of wave power generation floaters, a conical net guide frame, a wave gathering-wave absorbing cylinder, a wave gathering platform, paddles, a gear accelerator, a turbine worm and the like. The wave gathering platform is controlled to ascend and descend according to different water depths, so that the position of the wave power generation floater is controlled to make full contact with the water surface; the wave focusing device improves the oscillation of the wave power generation floater so as to improve the efficiency; the wave power generation floater adopts a dual power generation mode of swing power generation and vertical oscillation power generation to improve the power generation efficiency; the wave focusing-absorbing device not only utilizes reflected waves to focus waves, but also weakens wave propagation; part of waves penetrate through the wave gathering-absorbing cylinder to generate tidal current to drive the tidal current generator to rotate to form a secondary power generation effect; the blades connected to the wave gathering-absorbing device not only form a secondary power generation effect, but also scatter the waves propagated through gaps of the column body so as to reduce the influence of coast erosion and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of ocean engineering wave power generation, and relates to a nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device. Background Art

[0002] With the gradual depletion of non-renewable energy (such as oil, coal, and natural gas), the demand for renewable energy is increasing. Wave energy has the characteristics of wide distribution, huge reserves, and is not affected by weather conditions. It has gradually become a way to meet people's demand for renewable energy. A wave power generation device is a device that converts wave energy into electrical energy. Wave energy is a clean, green energy and is renewable. With the rapid development of wave power generation technology in the past few decades, a variety of wave power generation devices have appeared, such as float type, swing wing type, water column oscillation type, oscillating body type, and coastal wall type, but the efficiency of wave energy conversion is still a hot research issue; first, in near-coastal waters, waves are easily affected by factors such as water depth and seabed topography, making the superposition and interference of waves more obvious, and refraction makes the energy of waves concentrated in a specific area to form a wave gathering effect, resulting in an increase in wave height and energy; secondly, excessive wave energy accumulation will lead to serious impacts on fisheries and aquaculture, coastal erosion, etc. Summary of the invention

[0003] In view of the above problems, the present invention aims to propose a nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device.

[0004] The technical solution of the present invention is: a nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device described in the present invention comprises a plurality of evenly distributed wave absorbing column bottom fixing devices, a connecting rod 2 is arranged between adjacent wave absorbing column bottom fixing devices, and an anti-slip device is inserted at the upper ends of the plurality of wave absorbing column bottom fixing devices.

[0005] Furthermore, buoys are arranged and sleeved on the upper ends of the plurality of anti-slip devices, and connecting rods for connecting the buoys are installed between the buoys that are close to each other.

[0006] A generator 1 is arranged at one end of the buoy facing outward, and a propeller blade is arranged on the generator 1.

[0007] Furthermore, limiters are installed at the upper middle end of the anti-slip device and the lower end of the buoy.

[0008] Furthermore, a conical guide grid device is installed at the center position of one side near a plurality of evenly distributed wave-breaking column bottom fixing devices, and the conical guide grid device includes a conical guide grid installed at the lower end, a turbine vortex rod installed at the upper end of the conical guide grid, and a wave focusing platform installed at the upper end of the turbine vortex rod.

[0009] Furthermore, an annular bracket is installed on the upper side of the wave focusing platform.

[0010] At least five magnetoelectric devices are evenly arranged on the annular support, a vertical lifting structure is arranged at the lower end of the magnetoelectric device, and a wave power generation float is arranged at the lower end of the vertical lifting structure.

[0011] Furthermore, the magnetoelectric device comprises a waterproof cover, and coils are respectively installed on both sides of the interior of the waterproof cover;

[0012] A magnet is installed between the coils on both sides, a vertical lifting rod penetrating the annular bracket is installed on the magnet, a joint ball is installed at the other end of the vertical lifting rod, and the lower end of the joint ball is connected to the wave power generation float through the installed vertical lifting rod.

[0013] Furthermore, a vertical lifting limiter is installed on the vertical lifting rod and at the upper end of the joint ball.

[0014] Furthermore, the wave power generation float includes a float shell, a pendulum plate is installed at the inner center position of the float shell, a gear connecting rod is passed through the top of the pendulum plate, gear accelerators are installed at both ends of the gear connecting rod, and generator 2 is installed at the other end of the gear accelerators on both sides.

[0015] Furthermore, the other end of the vertical lifting rod is connected to the top cover of the vertical lifting rod.

[0016] Furthermore, two support plates are symmetrically arranged on the inner wall of the float housing, and the generator 2 and the gear accelerator on both sides are fixedly connected to the support plates.

[0017] The present invention provides a new power generation idea. In recent years, climate warming has caused the ocean temperature to rise, changing the distribution of ocean currents and wind fields, and further affecting the intensity and frequency of waves. Especially during storms, the impact of waves is stronger and more destructive, which poses a threat to buildings and ecosystems in coastal areas. The present invention makes full use of wave energy to achieve improved power generation efficiency, while also performing certain wave absorption, so that the impact of coastal erosion, fisheries and aquaculture is effectively reduced and multifunctional utilization is achieved. The present invention can be arranged in multiple directions along the coast to generate more electricity with the smallest possible sea area.

[0018] The beneficial effects of the present invention are as follows: 1. The wave-gathering platform can be controlled to be raised and lowered according to different water depths, thereby controlling the position of the wave power generation float to make it fully contact with the water surface; 2. The wave focusing device can improve the oscillation of the wave power generation float and thereby improve the efficiency of wave power generation; 3. The wave power generation float adopts a dual power generation mode of swing power generation and vertical oscillation power generation to improve the power generation efficiency; 4. The wave-gathering-wave-breaking device can not only make full use of reflected waves to focus waves, but also weaken wave propagation to a certain extent; 5. After some waves pass through the wave-gathering-wave-breaking column, a tidal current will be generated to drive the tidal current generator to rotate and form a secondary power generation effect; 6. The wave-gathering-wave-breaking device is connected with a paddle, which can not only form a secondary power generation effect to make full use of wave energy, but also break up the waves propagating through the gaps between the columns and thereby reduce the effects of coastal erosion and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall operation of several devices in the present invention;

[0020] Figure 2 It is a structural schematic diagram of the device in the present invention;

[0021] Figure 3 It is a structural schematic diagram of the magnetoelectric device in the present invention;

[0022] Figure 4 It is a structural schematic diagram of the wave power generation float in the present invention;

[0023] Figure 5 It is a schematic diagram of the arrangement analysis of five wave-gathering and wave-dissipating columns listed in the present invention;

[0024] In the figure, 1, annular bracket; 2, magnetoelectric device; 3, wave power generation float; 4, wave focusing platform; 5, turbine vortex rod; 6, conical guide grid; 7, joint ball; 8, vertical lifting structure; 9, buoy; 10, blade; 11, generator one; 12, connecting rod one; 13, anti-slip device; 14, bottom fixing device of wave-breaking column; 15, connecting rod two; 16, generator two; 17, gear accelerator; 18, gear connecting rod; 19, pendulum plate; 20, float housing; 21, waterproof cover; 22, coil; 23, magnet; 24, vertical lifting rod; 25, vertical lifting limiter, 26 is the limiter. DETAILED DESCRIPTION

[0025] The specific technical scheme of the present invention is further described in detail below with reference to specific examples.

[0026] As shown in the figure, the nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device described in the present invention improves the power generation efficiency by focusing the waves and absorbs the waves to a certain extent. The main body of the device is composed of a wave power generation float 3, a conical guide grid 6, a wave focusing-wave absorbing column, a wave focusing platform 4, blades 10, a gear accelerator 17, a generator, a turbine vortex 5, etc.

[0027] Since the present invention is suitable for use near the coast, the conical guide grid 6 is fixed on the seabed with high stability, and the top of the conical guide grid 6 is controlled by a turbine vortex device to control the wave focusing platform 4 to climb up and down. The device can control the lifting and lowering adjustment of the wave focusing platform 4 to adapt to the change of water level;

[0028] Among them, the structure of the turbine vortex 5 will have many advantages in marine applications: 1. The turbine vortex 5 has good fluid properties and has strong wind and wave resistance; 2. It has strong adaptability and can adjust the position and angle to adapt to different tidal and wave conditions; 3. Due to the use of corrosion-resistant and wear-resistant materials, it can operate for a long time in the ocean, reducing maintenance costs and maintenance frequency; in this way, when the water level rises and falls due to tides or fluctuations, the wave-gathering platform 4 can dynamically adjust the position of the wave power generation float 3 so that it is in full contact with the water surface, thereby achieving maximum energy collection and conversion and improving power generation efficiency; in addition, a ring bracket 1 is placed on the top of the wave-gathering platform 4, and a wave power generation float 3 is placed on the ring bracket 1.

[0029] Furthermore, the wave power generation buoy 3 of the present invention adopts a dual power generation mode, and such a design can effectively convert wave energy into electrical energy;

[0030] The wave power generation float 3 is composed of an oscillating shell (float shell 20), a gear accelerator 17, a generator, a swing plate 19, a joint ball 7, a vertical lifting structure 8, and a cutting magnetic flux line power generation device. Each part cooperates with each other to ensure that the device can still generate electricity stably under different waves.

[0031] First, when waves come, the wave power generation float 3 is first impacted by the waves, and the joint ball 7 drives the wave power generation float 3 to swing back and forth. The wave power generation float 3 is provided with a suspended pendulum plate 19, which also swings periodically. The swing of the pendulum plate 19 is the device utilizing wave energy and converting the wave energy into mechanical swing energy.

[0032] Subsequently, the energy conversion system is started to transfer the periodic motion energy of the pendulum plate 19 to the gear accelerator 17. The gear accelerator 17 increases the rotation speed through a transmission device, and finally drives the generator (generator 2 16) to operate, thereby realizing efficient conversion of mechanical energy into electrical energy and ensuring the utilization rate of wave energy and power generation efficiency to the greatest extent.

[0033] At the same time, the float device also has a vertical lifting structure 8. When the wave energy gathers at the wave power generation float 3, the wave power generation float 3 will not only swing but also oscillate in the vertical direction.

[0034] The vertical lifting structure 8 enables the wave power generation float 3 to rise and fall in the waves; a magnetoelectric structure is arranged at the annular bracket 1 on the top of the wave power generation float 3, and when the wave power generation float 3 is in heaving motion, the magnetoelectric structure uses the motion of the float to generate power; this design realizes the power generation efficiency of the wave power generation float 3 under the condition of up and down oscillation, so that the wave power generation float 3 can still generate power stably under the condition of more violent waves; at the same time, it also lays the foundation for the subsequent wave focusing; when the wave reaches the wave-breaking column, a certain amount of reflected wave will be generated, and when the incident wave and the reflected wave are superimposed, a focusing wave effect will be generated;

[0035] The present invention makes full use of this principle and focuses the incident waves and reflected waves at the wave power generation float 3 through calculation, so that the vertical oscillation frequency of the wave power generation float 3 is greatly increased, thereby improving the power generation effect;

[0036] Compared with the traditional single power generation mode, the dual mode effectively combines the two motion forms of the wave power generation float 3, namely, the left and right swing and the vertical oscillation, to ensure the power generation efficiency of the device under various wave conditions. The design of the device can achieve power generation while reducing pollution and damage to the ocean.

[0037] Furthermore, in order to further improve power generation efficiency and protect coastal erosion, the device is also designed with a wave-gathering and wave-breaking column; the wave-gathering and wave-breaking column has two main functions: 1. With the influence of global climate, extreme weather occurs frequently, and coastal areas experience stronger winds and waves. The presence of the wave-breaking device can effectively slow down the energy and height of the waves and reduce the impact on the coastline; 2. When the waves propagate to the wave-breaking column, a part of the energy will be reflected, and a focusing effect will be produced with the incident waves, thereby forming a wave-gathering area. In this designated area, the wave energy is enhanced, so that the wave power generation float 3 produces a stronger oscillation motion. Through this method of focusing waves, the wave power generation float 3 can absorb more wave energy, thereby achieving efficiency improvement.

[0038] Furthermore, the design concept of the wave focusing and wave breaking device integrates the two functions of power generation and protection, realizing the secondary utilization of wave energy and the protection of the coastline; the device mainly includes: a wave focusing and wave breaking column, a blade 10, a buoy 9 and a limiter (vertical lifting limiter 25), etc.;

[0039] Each blade 10 is connected together and connected to the wave-breaking column through a buoy 9 and a connecting rod 12. However, the cooperation between the buoy 9 and the limiter (vertical lifting limiter 25) can effectively control the moving distance of the blade 10 to ensure the effective operation of the device. The top of the column adopts an anti-detachment design to prevent the device from detaching from the column. The bottom of the column is provided with a fixed structure (wave-breaking column bottom fixing device 14) to enhance the stability of the column. In actual practice, when the wave reaches the wave-breaking column, a part of the energy will be reflected and combined with the incident wave to achieve a wave gathering effect around the float, thereby improving the power generation efficiency; another part of the energy will pass through the column through the gap between the columns and generate wave-induced flow behind the column; the wave-induced flow phenomenon is a phenomenon in which a wave generates water flow after passing through an obstacle, which can drive the nearby water body to flow, etc.; using this phenomenon, the rotation of the blade 10 is promoted to convert the wave energy into mechanical energy, and then into electrical energy through the power generation device; this idea of ​​secondary power generation can make full use of the residual energy of the wave and greatly improve the utilization rate of wave energy.

[0040] The rotation of the blades 10 can not only be used to generate electricity, but also disperse the waves. When the waves are broken up by the blades 10, the energy of the waves is dispersed more evenly, thus preventing the subsequent waves from concentrating again. After the waves pass through the entire wave focusing and wave breaking device, the wave energy is fully utilized and weakened, thus reducing the impact and erosion on the coastline, thereby protecting the coastline, etc.

[0041] The characteristic of this device is the combination of wave gathering and wave breaking with power generation, which not only meets the demand for renewable energy, but also increases the protection of the coastline to a certain extent; at the same time, it can also extract energy from waves, realizing the dual use of "protection-utilization".

[0042] Each device in this device is connected to the monitoring switchboard wirelessly.

[0043] The shell (the float shell 20), the wave gathering and wave breaking column, the semi-submersible lifting platform (the wave gathering platform 4) and the like of the above-mentioned wave power generation float 3 are all coated with corrosion-resistant materials.

[0044] Furthermore, in order to prove the process of wave focusing effect formed by the encounter of incident wave and reflected wave, the present invention lists five wave focusing and wave breaking column arrangements for analysis. Figure 5 , the analytical path equation is as follows:

[0045] Assuming that the incident wave and the reflected wave have the same velocity, the incident wave position is (X i ,C)i=1,2,3,4,5, the wave-gathering and wave-dissipating columns are located from right to left in the order (x i ,y i )i=1,2,3,4,5

[0046] The incident wave propagates to the wave focusing and wave absorbing cylinder and is reflected. The path of the first wave focusing and wave absorbing cylinder is as follows:

[0047]

[0048] x1 2 +y1 2 =(l-|C-y1) 2

[0049] Among them, let l- | C | =L

[0050] x1 2 +y1 2 =(L-y1) 2

[0051] x1 2 =L 2 -2Ly1

[0052] According to the above equation, the present invention sets the position of the first wave focusing and wave breaking column, and sets the positions of other wave focusing and wave breaking columns by analogy. When each wave focusing and wave breaking column satisfies the above equation, the waves will be focused around the wave power generation float, thereby improving the power generation efficiency.

[0053] The key points and protection points of the invention are: 1. In the near coast, the reflection of the column is used to focus the wave and the reflected wave, and the waves are gathered to a specific area to improve the power generation efficiency of the wave power generation float 3; 2. The swing of the wave power generation float 3 and the vertical magnetoelectric method are used to perform dual power generation to improve the power generation efficiency; 3. When the wave passes through the wave gathering and wave breaking column, a wave-induced flow phenomenon will be generated, which will drive the tidal generator to work and achieve a secondary power generation effect; 4. The arrangement of the wave gathering and wave breaking columns.

Claims

1. A nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device, characterized in that: It comprises a plurality of evenly distributed wave-breaking column bottom fixing devices (14), a second connecting rod (15) is arranged between adjacent wave-breaking column bottom fixing devices (14), and an anti-slip device (13) is inserted at the upper ends of the plurality of wave-breaking column bottom fixing devices (14).

2. According to claim 1, a nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device is characterized in that: Floats (9) are arranged and sleeved on the upper ends of the plurality of anti-slip devices (13), and connecting rods (12) for connecting the buoys (9) are installed between the buoys (9) that are close to each other. A generator (11) is installed at one end of the buoy (9) facing outward, and a blade (10) is installed on the generator (11).

3. The nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device according to claim 2 is characterized in that: A stopper (26) is installed at the upper middle end of the anti-slip device (13) and the lower end of the buoy (9).

4. The nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device according to claim 1 is characterized in that: A conical guide grid device is installed at a central position on one side close to a plurality of evenly arranged wave-breaking column bottom fixing devices (14), the conical guide grid device comprising a conical guide grid (6) installed at the lower end, a turbine vortex rod (5) installed at the upper end of the conical guide grid (6), and a wave focusing platform (4) installed at the upper end of the turbine vortex rod (5).

5. The nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device according to claim 4 is characterized in that: An annular support (1) is installed on the upper side of the wave focusing platform (4). At least five magnetoelectric devices (2) are evenly arranged on the annular support (1), a vertical lifting structure (8) is arranged at the lower end of the magnetoelectric device (2), and a wave power generation float (3) is arranged at the lower end of the vertical lifting structure (8).

6. The nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device according to claim 5 is characterized in that: The magnetoelectric device (2) comprises a waterproof cover (21), and coils (22) are respectively installed on both sides of the interior of the waterproof cover (21); A magnet (23) is installed between the coils (22) on both sides, a vertical lifting rod (24) inserted into the annular bracket (1) is installed on the magnet (23), a joint ball (7) is installed at the other end of the vertical lifting rod (24), and the lower end of the joint ball (7) is connected to the wave power generation float (3) through the installed vertical lifting rod (24).

7. The nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device according to claim 6 is characterized in that: A vertical lifting limiter (25) is installed on the vertical lifting rod (24) and at the upper end of the joint ball (7).

8. The nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device according to claim 6 is characterized in that: The wave power generation float (3) comprises a float shell (20), a swing plate (19) is arranged at the inner center position of the float shell (20), a gear connecting rod (18) is passed through the top end of the swing plate (19), gear accelerators (17) are arranged at both ends of the gear connecting rod (18), and a generator 2 (16) is arranged at the other end of the gear accelerators (17) on both sides.

9. The nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device according to claim 8 is characterized in that: The other end of the vertical lifting rod (24) is connected to the top cover of the vertical lifting rod (24).

10. The nearshore wave energy focusing-wave-induced current combined power generation and wave absorbing device according to claim 8 is characterized in that: Two support plates are symmetrically arranged on the inner wall of the float housing (20), and the generator 2 (16) and the gear accelerator (17) on both sides are fixedly connected to the support plates.

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