Efficient pneumatic wave power generation device

Abstract

The invention discloses an efficient pneumatic wave energy power generation device, and belongs to the technical field of ocean wave energy utilization. The device comprises a device platform, a turbine unit and a wing plate system, and the device platform comprises a seawater flow channel, an air flow channel, a streamline floating body system, a control system and a balancing weight; the seawater flow channel comprises a horizontal section flow channel and a vertical section flow channel which are communicated with each other, and a seawater flow channel opening is formed in the end, away from the vertical section flow channel, of the horizontal section flow channel; the bottom of the horizontal-section runner is connected with the wing plate system, and the streamline floating body system is arranged at the top of the horizontal-section runner; a control system and a balancing weight are arranged in the streamline floating body system; the air flow channel is arranged at the top of the vertical section flow channel and is communicated with the vertical section flow channel; air flows unidirectionally in the horizontal connecting section so as to drive the turbine unit to rotate for power generation; the wing plate system is arranged at the bottom of the horizontal section runner. The defects of an existing wave energy power generation device in the aspects of energy conversion efficiency and stability are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of ocean wave energy utilization, and in particular to a high-efficiency pneumatic wave energy power generation device. Background Art

[0002] At present, the global demand for renewable energy is growing, and wave energy as a potential clean renewable energy has attracted much attention. Since wave energy has the characteristics of wide distribution and huge reserves, it is of great significance to make full use of clean wave energy for efficient and reliable wave energy generation.

[0003] However, current wave energy power generation devices still have several shortcomings, which have led to slow progress in practical engineering applications and have not yet achieved industrial operation. These shortcomings mainly include: (1) Multi-floating body technology uses the relative movement between the floating body and the supporting platform to achieve wave energy conversion, which means that the device is composed of at least two or more structures, which is large in scale, high in engineering cost, difficult to implement and has poor reliability. In severe sea conditions, it is difficult to predict the complex interactions between the multi-floating structures, making the effective implementation of the control strategy more difficult. Hydraulic transmission systems are often used to achieve energy conversion, resulting in poor reliability and low survivability, and oil leakage may occur, causing harm to the ecological environment (see patent "A wave energy capture device", announcement number: CN 107120226 A).

[0004] (2) Existing wave energy power generation devices need to go through a multi-stage energy conversion process. In particular, there is a large amount of energy loss such as friction and resistance during the wave energy capture process, resulting in low energy conversion efficiency of the entire device (see patent "A wave power generation device", announcement number: CN 112943516 B). Therefore, it is necessary to further optimize the device appearance design, develop efficiency-enhancing broadband technology, achieve efficient operation of the device under broadband conditions, and improve power output performance.

[0005] (3) The current impulse air turbines used for wave energy conversion have a low cost-effectiveness, and the two main turbine designs still have certain limitations. At present, the energy conversion efficiency of the bidirectional self-rectifying I-type impulse air turbine in converting aerodynamic power into rotor mechanical power is about 45%, and the efficiency of the bidirectional self-rectifying U-type turbine is about 60%. Since the axial flow impulse design with fixed and symmetrical upstream and downstream guide vanes is difficult to adapt to the complexity of bidirectional airflow, the interaction efficiency of the airflow with the turbine blades under different directions and conditions is not high, resulting in significant energy loss, limiting the improvement of the overall efficiency of the air turbine. Although the bidirectional I-type turbine has a relatively simple structure, it is difficult to achieve a high energy utilization rate under the action of bidirectional airflow; while the U-type turbine achieves a high efficiency through a complex flow channel design, but it is large in size and complex in structure, resulting in cost and installation limitations in practical applications (see the patent "Pneumatic wave power generation device and catamaran pneumatic wave power generation ship", announcement number: CN 114876713 A). Due to the low wave energy density in my country's sea areas, the aerodynamic power loss of traditional air turbines is large when the wave energy density is low, resulting in low energy conversion efficiency of the turbine and high wave energy utilization cost. Therefore, it is necessary to use a new type of impulse air turbine to improve energy utilization, reduce the size and complexity of the equipment, and reduce maintenance costs, so as to provide a more efficient and economical solution to the problem of improving the multi-stage energy conversion efficiency of wave energy.

[0006] (4) Wave energy power generation devices deployed in deep sea waters face severe survival tests under extreme sea conditions (see patent "A wave power generation device", announcement number: CN 110905717 B). Due to the frequent typhoon weather in my country, it is very easy for wave energy power generation devices to malfunction, capsize or even be damaged. In extremely harsh working environments, once a malfunction, capsize or even be damaged occurs, it will be difficult to repair, or even if it can be repaired, it will be quite difficult and the cost of repair will be high. In addition, due to the impact of waves, the device often has a large displacement, which makes it difficult to keep it in a fixed position, thereby affecting normal operation. Therefore, it is necessary to improve the existing device structure design, increase the stability and wave resistance of the device, avoid capsizing or displacement, and improve the overall power generation efficiency and self-positioning performance.

[0007] (5) The traditional backward-bent-tube oscillating water column wave energy power generation device is not competitive due to the relatively low wave energy density in my country's waters, relatively low device efficiency and high levelized cost of wave energy power generation. Therefore, the invention of a new backward-bent-tube oscillating water column wave energy power generation device with a simple structure, stable and efficient operation and easy maintenance is of great significance for improving the cost-effectiveness of wave energy utilization and promoting the commercialization of wave energy development. Summary of the invention

[0008] The purpose of the present invention is to provide a high-efficiency pneumatic wave energy power generation device to make up for the deficiencies of the prior art.

[0009] The present invention adopts a unidirectional self-regulating impulse air turbine, which improves the energy conversion efficiency of the device turbine, can achieve self-positioning in complex sea conditions, ensures a safe and stable operating state, significantly improves the reliability and survivability of the system, and solves the shortcomings of existing devices in terms of efficiency and stability.

[0010] To achieve the above object, the present invention adopts the following technical solutions: A high-efficiency pneumatic wave energy power generation device includes a device platform, a turbine unit arranged on the floating platform, and a wing plate system under the device. The device platform includes a seawater flow channel, an air flow channel, a floating body system, a control system, and a counterweight block. The seawater flow channel includes a horizontal section flow channel and a vertical section flow channel that are interconnected. The horizontal section flow channel has a seawater flow channel outlet at one end away from the vertical section flow channel. The bottom of the horizontal section flow channel is connected to the wing plate system, and the floating body system is arranged on the top of the horizontal section flow channel. The control system and the counterweight block are arranged inside the floating body system. The air flow channel includes a vertical tapered section, a vertical connecting section, and a horizontal connecting section. The air flow channel is arranged at the top of the vertical section flow channel and is connected to the vertical section flow channel. The air flows unidirectionally in the horizontal connecting section, thereby driving the turbine unit to rotate and generate electricity.

[0011] Furthermore, the horizontal section of the seawater flow channel is connected to one end of the vertical section of the flow channel to form an L-shaped seawater flow channel; the horizontal section of the flow channel has no bends on the side, an equal-width flow channel is arranged facing the seawater flow channel outlet, and the seawater flow channel outlet is arranged in a direction opposite to the incoming wave direction.

[0012] Furthermore, the upper side of the bottom wall and the top wall of the horizontal section flow channel are connected with the side wall of the vertical section flow channel away from the seawater flow channel outlet by an arc; the lower side of the bottom wall of the horizontal section flow channel and the side wall of the vertical section flow channel away from the seawater flow channel outlet are connected with a right angle.

[0013] Furthermore, a plurality of mutually parallel channel baffles are arranged inside the horizontal section flow channel. The channel baffles are perpendicular to the bottom of the horizontal section flow channel and parallel to each other. The channel baffles are arranged at the seawater flow channel outlet and extend straightly toward the vertical section flow channel until they overlap the inner wall of the vertical section flow channel and run through the entire horizontal section flow channel, so as to increase the stiffness of the top plate and the bottom plate of the horizontal section flow channel, reduce the energy loss of lateral wave energy radiation, and further improve the energy capture efficiency of the device.

[0014] Furthermore, the top of the vertical section flow channel is connected to the air flow channel, and the water body flows relatively in the seawater flow channel, pushing the gas in the air flow channel to oscillate up and down within a certain range.

[0015] Furthermore, the top of the vertical tapering section tapers vertically upward and transitions into two circular ports, and the top of the vertical tapering section is respectively connected to the two vertical connecting sections.

[0016] Furthermore, the two vertical connecting sections are connected by a horizontal connecting section, and the turbine unit is arranged inside the horizontal connecting section and can rotate under the action of the unidirectional airflow.

[0017] Furthermore, swing check valves are provided at the junction of the vertical tapering section and the vertical connecting section, as well as at the junction of the vertical connecting section and the outside atmosphere, and the opening direction of each swing check valve is fixed, so that air can enter the air flow channel from the outside atmosphere and the upper part of the seawater flow channel through the swing check valve, or flow into the atmosphere from the air flow channel.

[0018] Furthermore, the opening and closing state of the swing check valve is determined by the pressure difference on both sides of the valve. When the inlet pressure of the valve is greater than the outlet pressure, the valve will rotate around the axis to a certain position and be in the open state; when the pressure difference on both sides of the valve decreases to a certain value, the valve falls and returns to the closed state.

[0019] Furthermore, by setting the valve opening direction of the swing check valves on both sides of the vertical air flow channel, the valves can be opened or closed automatically depending on the pressure of the gas flow, so that the air can flow unidirectionally in the horizontal connecting section, thereby driving the turbine rotor of the turbine unit to rotate and generate electricity.

[0020] Furthermore, the floating body system includes a streamlined floating body and a bottom floating body. The streamlined floating body is arranged above the top wall of the horizontal section flow channel. The width of the streamlined floating body gradually narrows from the width of the horizontal section flow channel to the tip. The narrowing line adopts a smooth streamlined design composed of an outer convex curve and an inner concave curve, which can reduce the loss of wave energy during the interaction between the device and the wave.

[0021] Furthermore, a control system and a counterweight are arranged inside the streamlined float. The control system is connected to the turbine unit. The counterweight is arranged at one end close to the seawater flow outlet to adjust the center of gravity and draft of the device to improve the stability of the device.

[0022] Furthermore, the bottom float is arranged in the cavity at the bottom of the horizontal section flow channel and the inner wall of the vertical section flow channel, which can be used to balance the device structure, enhance the device's anti-overturning ability, and ensure its smooth operation during operation.

[0023] Furthermore, the air turbine and the generator are both packaged with waterproof, moisture-proof and salt spray corrosion-resistant materials, and the air turbine and the generator are connected by a contactless magnetic coupling.

[0024] Furthermore, the air turbine may be an I-type flow channel unidirectional self-rectifying impulse air turbine or a U-type flow channel unidirectional self-rectifying impulse air turbine.

[0025] Furthermore, the air turbine is placed inside the horizontal connecting section of the air flow channel. When the air turbine is an I-type flow channel unidirectional self-rectifying impulse air turbine, the turbine axis of the air turbine is arranged horizontally and is parallel to the axis of the horizontal connecting section; when the air turbine is a U-type flow channel unidirectional self-rectifying impulse air turbine, the turbine axis of the air turbine is arranged vertically and is perpendicular to the axis of the horizontal connecting section.

[0026] Furthermore, the air turbine includes guide vanes, a turbine rotor and a turbine flow channel. The turbine rotor includes multiple blades, whose suction side contour is elliptical and whose pressure side contour is arc-shaped. The guide vanes are evenly distributed on one side of the turbine rotor, and their contour consists of straight line segments and arc segments, which can effectively guide the airflow, reduce flow losses, and improve the overall performance and stability of the turbine.

[0027] Furthermore, the air flows unidirectionally in the horizontal connecting section, driving the turbine rotor to rotate unidirectionally, thereby driving the generator to rotate, converting aerokinetic energy into electrical energy.

[0028] Furthermore, the wing plate system includes a connecting rod and a wing plate, which are arranged at the bottom of the horizontal flow channel on a side away from the seawater flow channel outlet. The upper end of the connecting rod is fixedly connected to the bottom of the horizontal section flow channel, and the lower end of the connecting rod is hinged to the wing plate, so that the wave-facing angle of the wing plate can be flexibly adjusted according to the wave conditions.

[0029] Furthermore, both the upper and lower surfaces of the wing plate adopt streamlined curved surfaces, which can effectively reduce wave resistance and improve fluid dynamics performance.

[0030] Furthermore, by rotating the wing follower device within a certain range within the upper and lower clamping points of the connection, a forward or backward thrust component is generated, thereby reducing the pitch amplitude of the device under the action of waves and increasing the longitudinal swing amplitude, thereby improving the energy conversion efficiency and stability of the wave energy power generation device.

[0031] Compared with the prior art, the present invention has at least the following beneficial effects: (1) The present invention adopts single float technology and has stable, reliable and efficient operation characteristics. The device uses air as the medium for energy conversion. Seawater flows relatively in the float flow channel, causing the pressure of the air chamber above the flow channel to change periodically, thereby driving the air turbine to drive the generator to generate electricity. Its power generation principle is relatively simple and its structure is sturdy and durable.

[0032] (2) The present invention uses a swing check valve to control the direction of airflow. After being affected by waves, the water in the vertical section of the L-shaped flow channel oscillates up and down, causing the air in the flow channel above it to be discharged or sucked into the flow channel through the swing check valve, thereby driving the air turbine to rotate and drive the generator to generate electricity. Since the device is relatively light in weight, the floating platform undergoes heave, sway and pitch movements under the action of waves, causing the water body and the floating body to resonate, further improving the efficiency of capturing wave energy, and helping to overcome the disadvantage of the relatively low capture width of the oscillating water column wave energy power generation device.

[0033] (3) The present invention adopts a unidirectional self-rectifying radial flow or axial flow impulse air turbine, and can select an I-type flow channel unidirectional self-rectifying impulse air turbine or a U-type flow channel unidirectional self-rectifying impulse air turbine, and the efficiency of converting aerodynamic energy into mechanical energy of the turbine rotor reaches 75% and 82% respectively. Compared with the traditional two-way turbine, this unidirectional airflow has higher stability and smaller flow resistance, thereby significantly improving the energy conversion efficiency of the turbine. Through numerical simulation experiments, the results show that the energy conversion efficiency of the unidirectional turbine is improved by 41.5% and 26.2% respectively compared with the two-way turbine. At the same time, the unidirectional rectifying turbine can more effectively concentrate the kinetic energy of the airflow on the turbine blades, improve the output efficiency of mechanical energy, and reduce the aerodynamic loss of the downstream outflow of the turbine. Therefore, the unidirectional turbine has a significant advantage in wave energy conversion efficiency compared with the two-way turbine.

[0034] (4) The air turbine and generator of the present invention adopt moisture-proof packaging to improve durability in marine corrosion environments, and adopt a contactless magnetic coupling method to reduce the damping caused by friction and reduce energy loss during power generation. In addition, the turbine generator set of the device is located above the water surface and is not in direct contact with seawater, thereby reducing seawater corrosion. It has the characteristics of simple structure, flexible deployment, and convenient maintenance. Its reliability and durability also have certain advantages over other wave power generation devices.

[0035] (5) The present invention is provided with a wing system, and the wave-facing angle of the wing can be automatically and flexibly adjusted according to the wave conditions. Under the action of waves, the wing moves up and down synchronously with the device, and a forward or backward thrust component is generated in the process. Numerical simulation experiments show that this thrust can effectively reduce the pitch amplitude of the device under the action of waves by 20.5%, increase the longitudinal swing amplitude by 18.6%, and thereby increase the energy conversion efficiency of the device by 16.5% and increase the stability of the device by 20.5%. Through this thrust adjustment mechanism, the pitch amplitude of the device is significantly reduced, and the longitudinal swing amplitude is increased, and the amount of water in and out of the flow channel is also increased, thereby improving the power generation efficiency and overall stability of the device, optimizing the cost performance of the device, and providing a more efficient and economical solution for the commercial utilization of wave energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1It is an axonometric view of a pneumatic wave energy power generation device according to an embodiment.

[0037] Figure 2 It is a front view of the pneumatic wave energy power generation device of the embodiment.

[0038] Figure 3 It is a schematic diagram of the working state of the pneumatic wave energy power generation device of the embodiment.

[0039] Figure 4 It is a schematic diagram of another working state of the pneumatic wave energy power generation device of the embodiment.

[0040] Figure 5 It is a half-section structural diagram of the air turbine of the embodiment.

[0041] Figure 6 A half-section structural diagram of an air turbine according to another embodiment.

[0042] Figure 7 It is a front view of a pneumatic wave energy power generation device according to another embodiment.

[0043] Among them, 1-device platform; 11-seawater flow channel; 111-horizontal section flow channel; 112-vertical section flow channel; 113-seawater flow channel outlet; 114-flow channel baffle; 12-air flow channel; 121-vertical tapered section; 122-vertical connecting section; 123-horizontal connecting section; 124-swing check valve; 13-floating system; 131-streamlined floating body; 131-bottom floating body; 14-control system; 15-counterweight block; 2-turbine unit; 21-air turbine; 211-guide vane; 212-turbine rotor; 213-turbine flow channel; 22-generator; 3-wing plate system; 31-connecting rod; 32-wing plate. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in 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.

[0045] The terms used herein are only for describing specific embodiments and are not intended to limit the disclosure of the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0046] In the disclosure of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the disclosure of the present invention can be understood according to specific circumstances.

[0047] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0048] Embodiment 1: See also Figure 1 and Figure 2 This embodiment provides a high-efficiency pneumatic wave energy power generation device, including a device platform 1, a turbine unit 2 arranged on the device platform 1, and a wing plate system 3 below the device platform.

[0049] Among them, the device platform 1 includes a seawater flow channel 11, an air flow channel 12, a floating system 13, a control system 14 and a counterweight 15; the seawater flow channel 11 includes a horizontal section flow channel 111 and a vertical section flow channel 112 that are interconnected, and the horizontal section flow channel 111 is provided with a seawater flow channel outlet 113 connected to the sea at one end away from the vertical section flow channel 112, so that seawater can flow in or out under the action of waves; the bottom of the horizontal section flow channel 111 is connected to the wing plate system 3, and the floating system 13 is arranged on the top of the horizontal section flow channel 111; the control system 14 and the counterweight 15 are arranged inside the floating system 13.

[0050] In this embodiment, the air flow channel 12 includes a vertical tapered section 121, a vertical connecting section 122, and a horizontal connecting section 123. Air can enter the air flow channel 12 from the outside atmosphere, or flow from the air flow channel 12 to the atmosphere. The air flows unidirectionally in the horizontal connecting section 123, thereby driving the turbine unit 2 to rotate and generate electricity.

[0051] Optionally, the horizontal section flow channel 111 of the seawater flow channel 11 is connected to one end of the vertical section flow channel 112 to form an L-shaped seawater flow channel; the side of the horizontal section flow channel 111 has no bends, and an equal-width flow channel is set facing the seawater flow channel outlet 113, and the seawater flow channel outlet 113 is set in a direction opposite to the incoming wave direction.

[0052] Optionally, an arc is used to connect the upper side of the bottom wall and the top wall of the horizontal section flow channel 111 with the side wall of the vertical section flow channel 112 away from the seawater flow channel outlet 113; a right-angle turn is used between the lower side of the bottom wall of the horizontal section flow channel 111 and the side wall of the vertical section flow channel 112 away from the seawater flow channel outlet 113.

[0053] Optionally, a plurality of mutually parallel flow channel baffles 114 are arranged inside the horizontal flow channel 111, the flow channel baffles 114 are perpendicular to the bottom of the horizontal flow channel 111, the flow channel baffles 114 are mutually parallel, the flow channel baffles 114 are arranged at the seawater flow channel outlet 113, and extend straightly toward the vertical flow channel 112 until they overlap the inner wall of the vertical flow channel 112, and penetrate the entire horizontal flow channel 111, so as to increase the rigidity of the top plate and the bottom plate of the horizontal flow channel 111, reduce the energy loss of the lateral wave energy radiation, and further improve the energy capture efficiency of the device. In addition, the present invention discloses no limitation on the specific number of flow channel baffles 114, and generally 1 to 2 may be arranged.

[0054] Optionally, the floating body system 13 comprises a streamlined floating body 13 and a bottom floating body 132, wherein: The streamlined floating body 131 is arranged above the top wall of the horizontal section flow channel 111. The width of the streamlined floating body 131 gradually narrows from the width of the horizontal section flow channel 111 to the tip. The narrowing line adopts a smooth streamlined design composed of an outer convex curve and an inner concave curve, which can reduce the loss of wave energy during the interaction between the device and the wave. The streamlined floating body 131 is internally provided with a control system 14 and a counterweight 15. The counterweight 15 is arranged at one end close to the seawater flow channel outlet 113, and is used to adjust the center of gravity position and draft of the device to improve the stability of the device. The turbine unit 2 is connected to the control system 14.

[0055] The bottom float 132 is disposed in the cavity between the bottom of the horizontal section flow channel 111 and the inner wall of the vertical section flow channel 112, and can be used to balance the device structure, enhance the device's anti-overturning ability, and ensure its smooth operation during operation.

[0056] Optionally, the wing panel system 3 includes a connecting rod 31 and a wing panel 32, which are arranged at the bottom of the horizontal section flow channel 111 on the side away from the seawater flow channel outlet 113. The upper end of the connecting rod 31 is fixedly connected to the bottom of the horizontal section flow channel 111, and the lower end of the connecting rod 31 is hinged to the wing panel 32, so that the wave-facing angle of the wing panel 32 can be flexibly adjusted according to the wave conditions.

[0057] Optionally, both the upper surface and the lower surface of the wing plate 32 adopt streamlined curved surfaces, which can effectively reduce wave resistance and improve fluid dynamics performance.

[0058] Optionally, the wing plate 32 follows the device to rotate within a certain range within the upper and lower clamping points of the connection, and the rotation angle is set to about 50°, thereby generating a forward or backward thrust component, thereby reducing the pitch amplitude of the device under the action of waves and increasing the longitudinal swing amplitude, thereby improving the energy conversion efficiency and stability of the wave energy power generation device.

[0059] Optionally, the turbine unit 2 includes an air turbine 21 and a generator 22. Both the air turbine 21 and the generator 22 are packaged with waterproof, moisture-proof, and salt spray corrosion-resistant materials, and the air turbine 21 and the generator 22 are connected by a contactless magnetic coupling.

[0060] Figure 3 The schematic diagram schematically shows the working state of the pneumatic wave energy power generation device according to this embodiment.

[0061] See also Figure 3 In this embodiment, under the action of the wave crest, the water in the horizontal section flow channel 111 of the seawater flow channel 11 of the pneumatic wave energy power generation device flows relatively, pushing the liquid level in the vertical section flow channel 112 to rise upward within a certain range, so that the gas pressure above the liquid level in the vertical section flow channel 112 gradually increases; when the valve inlet pressure of the left swing check valve 124 is greater than the outlet pressure, the valve will rotate around the axis to a certain position and be in an open state, and the gas in the seawater flow channel 11 passes through the swing check valve 124 to reach the gas flow channel 12; the gas passes through the gradually shrinking contraction section flow channel 121 and the vertical connecting section 122, enters the horizontal connecting section 123, pushes the internal turbine unit 2 to rotate, and flows into the atmosphere from the right swing check valve 124.

[0062] Figure 4 The schematic diagram schematically shows another working state of the pneumatic wave energy power generation device according to this embodiment.

[0063] See also Figure 4In this embodiment, under the action of the trough of the wave, the water body of the pneumatic wave energy power generation device flows relatively in the horizontal section flow channel 111 of the seawater flow channel 11, pushing the liquid level in the vertical section flow channel 112 to fall downward within a certain range, so that the gas pressure above the liquid level in the vertical section flow channel 112 gradually decreases; when the valve inlet pressure of the left swing check valve 124 is less than the outlet pressure, the valve will rotate around the axis to a certain position and be in a closed state, while the valve inlet pressure of the swing check valve 124 connected to the outside atmosphere is greater than the outlet pressure and is in an open state; the outside gas reaches the gas flow channel 12 through the swing check valve 124; the gas passes through the vertical connecting section 122 and enters the horizontal connecting section 123, pushing the internal turbine unit 2 to rotate, and flows into the atmosphere from the right swing check valve 124. By adopting these new turbine designs, the device can significantly improve energy utilization, reduce the size and complexity of the equipment, and reduce maintenance costs, thereby providing a more efficient and economical solution for the commercial use of wave energy.

[0064] Figure 5 A half-section structure diagram of an air turbine according to an embodiment disclosed in the present invention is schematically shown.

[0065] Figure 6 A half-section structure diagram of an air turbine according to another embodiment disclosed in the present invention is schematically shown.

[0066] Optionally, the air turbine 21 may be an I-type flow channel unidirectional self-rectifying impulse air turbine or a U-type flow channel unidirectional self-rectifying impulse air turbine.

[0067] Furthermore, if Figure 5 As shown, the air turbine 21 includes a guide vane 211, a turbine rotor 212 and a turbine flow channel 213. The turbine rotor 212 includes a plurality of blades, the suction side contour of which is elliptical and the pressure side contour of which is arc-shaped. The guide vane 211 is evenly distributed on one side of the turbine rotor 212, and its contour consists of straight line segments and arc segments, which can effectively guide the airflow, reduce flow losses, and improve the overall performance and stability of the turbine; the air flows unidirectionally in the horizontal connecting section 123, driving the turbine rotor 212 to rotate unidirectionally, thereby driving the generator 22 to rotate, and converting the aerokinetic energy into electrical energy.

[0068] like Figure 6As shown, the turbine flow channel 213 of the U-shaped flow channel unidirectional self-rectifying impulse air turbine can be regarded as a letter U shape with a certain thickness, which is a three-dimensional area formed by rotating one circle. At the inlet part of the flow channel, the guide vane 211 is placed between two horizontal flow channel walls to optimize the guidance of the airflow. The turbine rotor 212 is located in the cylindrical area at the center of the flow channel and is responsible for converting the kinetic energy of the airflow into mechanical energy. The contour of the connecting section between the blades of the turbine rotor 212 and the guide vane 211 presents a shape composed of a circular arc and straight line segments on both sides, which is conducive to improving the smoothness of the airflow, reducing eddy losses, and thus enhancing the overall energy conversion efficiency. In addition, the U-shaped structure of the flow channel and the configuration of the guide vanes can effectively control the direction of the airflow, optimize the aerodynamic performance, and provide the device with higher efficiency and stability during the wave energy conversion process.

[0069] Figure 7 A front view of a pneumatic wave energy power generation device according to another embodiment is schematically shown.

[0070] Optionally, the turbine unit 2 may be arranged in one of the following two ways: (1) If Figure 2 As shown, when the air turbine 21 is a type I flow channel unidirectional self-rectifying impulse air turbine, the air turbine 21 is installed inside the horizontal connecting section 123 of the air flow channel 12, and the turbine axis of the air turbine 21 is horizontally arranged and parallel to the axis of the horizontal connecting section 123.

[0071] (2) If Figure 7 As shown, when the air turbine 21 is a U-shaped flow channel unidirectional self-rectifying impulse air turbine, the air turbine 21 is installed inside the horizontal connecting section 123 of the air flow channel 12, and the turbine axis of the air turbine 21 is arranged vertically and perpendicular to the axis of the horizontal connecting section.

[0072] Embodiment 2: This embodiment is verified by experiments: STAR CCM+ software is used to simulate the airflow movement in the flow channel of the U-type flow channel unidirectional turbine and the I-type flow channel unidirectional turbine, respectively, calculate the average energy conversion efficiency of the turbine and analyze the aerodynamic performance, and obtain the efficiency of the U-type and I-type flow channel unidirectional turbines in converting aerokinetic energy into turbine rotor mechanical energy of 75% and 82% respectively; while the average energy conversion efficiency of the bidirectional turbine devices of the U-type flow channel and the I-type flow channel is about 53% and 65%. The results of the numerical simulation experiment show that the energy conversion efficiency of the unidirectional turbine is improved to a certain extent compared with the bidirectional turbine. The present invention is provided with a wing plate system, and the wing plate moves up and down synchronously with the device under the action of waves. STAR CCM+ software is used to simulate the six-degree-of-freedom movement of the original device and the device after the wing plate is set under specific sea conditions, analyze the oscillation amplitude of each degree of freedom, and calculate the energy conversion efficiency of the device in converting wave energy into aerokinetic energy. The simulation results show that the pitching amplitude of the device with wing panels is reduced by 20.5%, the sway amplitude is increased by 18.6%, and the energy conversion efficiency of the device is increased by 16.5% compared with the device without wing panels. Therefore, the installation of wing panels under the device can reduce the pitching amplitude of the device and increase the sway amplitude, which is beneficial to improving the power generation efficiency of the device and the overall stability under extreme sea conditions.

[0073] In summary, the above embodiments provide a high-efficiency pneumatic wave energy power generation device, which adopts a unidirectional self-regulating impulse air turbine, improves the energy conversion efficiency of the device turbine, can achieve self-positioning in complex sea conditions, ensures a safe and stable operating state, significantly improves the reliability and survivability of the device, and solves the shortcomings of existing wave energy power generation devices in terms of energy conversion efficiency and stability.

[0074] In the description of the present disclosure, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", "front", "back", "left", "right", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted when they may cause confusion in the understanding of the present disclosure. In addition, the shapes, sizes, and positional relationships of the components in the drawings do not reflect the actual size, proportion, and actual positional relationship.

[0075] Similarly, in order to simplify the disclosure of the present invention and help understand one or more of the various disclosed aspects, in the above description of the exemplary embodiments disclosed in the present invention, the various features disclosed in the present invention are sometimes grouped together into a single embodiment, figure or description thereof. The description with reference to the terms "specifically" or "specifically" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example disclosed in the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0076] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects disclosed in the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency pneumatic wave energy power generation device, characterized in that: It comprises a device platform (1), a turbine unit (2) arranged on the device platform (1), and a wing panel system (3) below the device platform (1); The device platform (1) comprises a seawater flow channel (11), an air flow channel (12) and a floating system (13), as well as a control system (14) and a counterweight (15) located in the floating system (13); the turbine unit (2) is connected to the control system (14).

2. The high-efficiency pneumatic wave energy power generation device according to claim 1, characterized in that: The seawater flow channel (11) comprises a horizontal flow channel (111) and a vertical flow channel (112) which are interconnected. The horizontal flow channel (111) is provided with a seawater flow channel opening (113) which is connected to the sea at one end away from the vertical flow channel (112) so as to allow seawater to flow in or out under the action of waves. The air flow channel (12) comprises a vertical tapered section (121), a vertical connecting section (122), a horizontal connecting section (123) and a swing check valve (124). The turbine unit (2) is arranged inside the horizontal connecting section (123). Air can enter the air flow channel (12) from the outside atmosphere, or flow out from the air flow channel (12) to the atmosphere. The air flows unidirectionally in the horizontal connecting section (123), thereby driving the turbine unit (2) to rotate unidirectionally to generate electricity.

3. The high-efficiency pneumatic wave energy power generation device according to claim 2, characterized in that: The horizontal section flow channel (111) of the seawater flow channel (11) is connected to one end of the vertical section flow channel (112) to form an L-shaped seawater flow channel; the side of the horizontal section flow channel (111) has no bends, and a flow channel of equal width is arranged facing the seawater flow channel opening (113), and the seawater flow channel opening (113) is arranged in a direction opposite to the incoming wave direction; a 90° uniform cross-section is adopted between the upper side of the bottom wall and the top wall of the horizontal section flow channel (111) and the side wall of the vertical section flow channel (112) on the side away from the seawater flow channel opening (113); 0 The outer side surface of the bottom wall of the horizontal section flow channel (111) and the outer side surface of the side wall of the vertical section flow channel (112) away from the seawater flow channel outlet (113) adopt a right angle turn.

4. The high-efficiency pneumatic wave energy power generation device according to claim 2, characterized in that: A plurality of mutually parallel flow channel baffles (114) are arranged inside the horizontal flow channel (111); the flow channel baffles (114) are perpendicular to the bottom of the horizontal flow channel (111) and are mutually parallel; the flow channel baffles (114) are arranged at the seawater flow channel outlet (113), extend straightly toward the vertical flow channel (112), overlap the inner wall of the vertical flow channel (112), and extend upwards in the vertical flow channel (112) to stop 1 meter to 2 meters above the still water surface; the flow channel baffles (114) run through the entire horizontal flow channel (111) to increase the rigidity of the top plate and the bottom plate of the horizontal flow channel (111) and the rigidity of the left and right side plates of the vertical flow channel (112) and the reliability of the horizontal flow channel (111) and the vertical flow channel (112), thereby reducing the energy loss of lateral wave energy radiation and improving the energy capture efficiency of the device.

5. The high-efficiency pneumatic wave energy power generation device according to claim 2, characterized in that: The vertical tapered section (121) is connected to the top of the vertical section flow channel (112) and communicates with the vertical section flow channel (112); the top of the vertical tapered section (121) vertically tapers upwards to transition into two circular ports; the top of the vertical tapered section (121) is respectively connected to two vertical connecting sections (122); the two vertical connecting sections (122) are connected by a horizontal connecting section (123); the ports connecting the vertical tapered section (121) and the vertical connecting section (122) are connected by a horizontal connecting section (123); A swing check valve (124) is provided at the junction of the vertical connecting section (122) and the outside atmosphere, and the opening direction of each swing check valve (124) is fixed, so that air can enter the air flow channel (12) from the outside atmosphere, or flow from the air flow channel (12) to the atmosphere. By setting the open and closed states of the swing check valve (124), air can flow in a single direction in the horizontal connecting section (123), thereby driving the turbine unit (2) to rotate and generate electricity.

6. The high-efficiency pneumatic wave energy power generation device according to claim 1, characterized in that: The floating body system (13) comprises a streamlined floating body (131) and a bottom floating body (132), wherein: the streamlined floating body (131) is arranged above the top wall of the horizontal section flow channel (111); a control system (14) and a counterweight (15) are arranged inside the streamlined floating body (131); the counterweight (15) is arranged at one end close to the seawater flow channel outlet (113) and is used to adjust the center of gravity position and draft of the device to improve the stability of the device; and the bottom floating body (132) is arranged at the bottom of the horizontal section flow channel (111).

7. The high-efficiency pneumatic wave energy power generation device according to claim 6, characterized in that: The width of the streamlined floating body (131) is first uniform in width and then gradually narrows to the tip from the end close to the vertical section flow channel (112) toward the inlet end of the horizontal flow channel. The narrowing line adopts a smooth streamlined design composed of an outer convex curve and an inner concave curve, which can reduce the loss of wave energy during the interaction between the device and the waves. The bottom floating body (132) is arranged on the outer side surface of the bottom of the horizontal section flow channel (111), the outer side surface of the side wall of the vertical section flow channel (112) away from the seawater flow channel outlet (113), and the 90° interval between the inner sides of the two. 0 The cavity formed by the arc surface can be used to balance the device structure, enhance the device's anti-overturning ability, and ensure its smooth operation during work.

8. The high-efficiency pneumatic wave energy power generation device according to claim 1, characterized in that: The turbine unit (2) comprises an air turbine (21) and a generator (22), and both the air turbine (21) and the generator (22) are packaged with waterproof, moisture-proof and salt spray corrosion-resistant materials; the air turbine (21) is an I-type flow channel unidirectional self-rectifying impulse air turbine or a U-type flow channel unidirectional self-rectifying impulse air turbine.

9. The high-efficiency pneumatic wave energy power generation device according to claim 8, characterized in that: The air turbine (21) is placed inside the horizontal connecting section (123) of the air flow channel (12); when the air turbine (21) is an I-type flow channel unidirectional self-rectifying impulse air turbine, the turbine axis of the air turbine (21) is arranged horizontally and is parallel to the axis of the horizontal connecting section (123); when the air turbine (21) is a U-type flow channel unidirectional self-rectifying impulse air turbine, the turbine axis of the air turbine (21) is arranged vertically and is perpendicular to the axis of the horizontal connecting section (123); the air turbine (21) includes a guide vane (211), A turbine rotor (212) and a turbine flow channel (213), wherein the turbine rotor (212) comprises a plurality of blades, the suction side profile of which is elliptical and the pressure side profile of which is arc-shaped, and the guide vanes (211) are evenly distributed on one side of the turbine rotor (212), and the profile of which is composed of straight line segments and arc segments, and can effectively guide the airflow, reduce flow losses, and improve the overall performance and stability of the turbine; the air flows unidirectionally in the horizontal connecting section (123), driving the turbine rotor (212) to rotate unidirectionally, thereby driving the generator (22) to rotate, and converting the pneumatic energy into electrical energy.

10. The high-efficiency pneumatic wave energy power generation device according to claim 1, characterized in that: The wing plate system (3) comprises a connecting rod (31) and a wing plate (32); the upper end of the connecting rod (31) is fixedly connected to the bottom of the horizontal section flow channel (111); the lower end of the connecting rod (31) is fixed to the wing plate (32) by a hinge connection, so that the wave-facing angle of the wing plate (32) can be flexibly adjusted according to wave conditions; the upper surface and the lower surface of the wing plate (32) are both streamlined surfaces to reduce wave resistance and improve fluid dynamics performance.

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