A bottom-mounted wave pressure-driven wave energy power generation device and its use method

Abstract

The present invention relates to the technical field of wave energy power generation, and proposes a bottom-mounted wave pressure-driven wave energy power generation device and a method of using the same, including an energy conversion system, wherein a power generation system is provided in the energy conversion system, and the power generation system is connected to an electric energy delivery system; the energy conversion system includes a bottom plate, which is connected to an outer shell, and a partition is transversely provided in the middle of the outer shell, and the partition divides the inner space of the outer shell into a transverse U-shaped gas flow channel; the outer shell is provided with an air inlet at the upper part of the U-shaped gas flow channel, and an air outlet at the lower part; the air inlet and the air outlet are connected by an air bag provided on the outer wall of the outer shell; and a rotating impeller including the power generation system is provided in the U-shaped gas flow channel. The present invention utilizes the pressure change at the same position underwater during the wave peaks and valleys as power to drive the gas flow inside the device to generate electricity, thereby avoiding the energy loss caused by the direct use of a mechanical transmission structure at present, improving the potential energy utilization rate of the wave, and enhancing the power generation effect.

Description

Technical Field

[0001] The invention relates to the technical field of wave energy power generation, in particular to a bottom-mounted wave pressure-driven wave energy power generation device and a use method thereof. Background Art

[0002] Most of the existing wave energy power generation devices are equipped with a large number of mechanical arms near the power generation platform. A floating structure is set at one end of the mechanical arm. The waves push the floating structure up and down, which can drive the mechanical arm to move up and down, and then push the air in the air chamber to drive the rotor, and finally convert it into electrical energy storage (such as: CN102261304A, CN215213758U, CN218325082U, etc.). This type of device has a large amount of energy loss during the swinging process of the mechanical arm, so it has a large requirement for the potential energy of the waves. When it is built on the coast, the power generation efficiency is low, and when it is built offshore, a large amount of sea area will affect the navigation of ships, and the anchoring system will also make the construction cost far greater than the benefits. Therefore, it is still difficult to use for commercial wave energy generation.

[0003] CN113294282A also provides a small wave power generation device, which relies on a floating body to lurk near the water surface, and the rotor and power generation equipment are located underwater, which can use the wave power to generate electricity efficiently; CN115585089A designs a small power generation device with a wave inlet and outlet, which uses the pressure difference generated by the waves entering and exiting the closed box to drive the rotor on the water surface to rotate and generate electricity. Both of these devices are submerged near the water surface. When used, the construction cost of the anchoring system and the power output system is high, and the overall output power of the small device is low, and it is difficult to achieve large-scale wave energy development.

[0004] Therefore, most existing wave energy power generation devices use floating structures floating near the sea surface to directly or indirectly use the pressure of waves to drive the generator to generate electricity. These devices tend to occupy a large area of ​​sea area, and the construction of the anchoring system of the device greatly increases the cost of wave energy power generation, making it difficult to promote commercial large-scale wave energy development. Summary of the invention

[0005] The present invention provides a bottom-mounted wave pressure-driven wave energy power generation device and a method of using the same, aiming to make up for the deficiencies of the prior art and at least solve one of the shortcomings of the prior art mentioned in the background technology.

[0006] The present invention adopts the following technical solutions to achieve the invention objectives:

[0007] A base-type wave pressure-driven wave energy power generation device comprises an energy conversion system, in which a power generation system is arranged, and the power generation system is connected to an electric energy delivery system; the energy conversion system comprises a bottom plate, which is connected to an outer shell, and a partition is transversely arranged in the middle of the outer shell, and the partition divides the inner space of the outer shell into a transverse U-shaped gas flow channel; the outer shell is provided with an air inlet at the upper part of the U-shaped gas flow channel, and an air outlet at the lower part; the air inlet and the air outlet are connected by an air bag arranged on the outer wall of the outer shell; and a rotating impeller included in the power generation system is arranged in the U-shaped gas flow channel.

[0008] In the aforementioned bottom-mounted wave pressure-driven wave energy power generation device, a group of air inlets are respectively arranged at the upper part of the U-shaped gas flow channel on the left and right sides of the shell; a group of air outlets are respectively arranged at the lower part of the U-shaped gas flow channel, and the air outlets and air inlets are respectively arranged in a one-to-one correspondence up and down, and the corresponding air outlets and air inlets are each connected by an air bag.

[0009] In the aforementioned bottom-mounted wave pressure driven wave energy power generation device, one-way gas valves are provided at the air inlet and the air outlet.

[0010] In the aforementioned bottom-mounted wave pressure driven wave energy power generation device, the power generation system includes a gear 1 coaxially arranged with the impeller, the gear 1 meshes with the gear 2, and the gear 2 is connected to the generator.

[0011] In the aforementioned bottom-mounted wave pressure driven wave energy power generation device, the power delivery system includes an internal cable connected to the generator, and the internal cable is connected to the external cable via a cable connecting member arranged on the side wall of the upper shell.

[0012] In the aforementioned bottom-mounted wave pressure driven wave energy power generation device, a lifting lug is connected to the top of the shell.

[0013] In the aforementioned bottom-mounted wave pressure driven wave energy power generation device, the upper bottom plate is provided with weight-bearing ribs.

[0014] In the aforementioned bottom-mounted wave pressure driven wave energy power generation device, a fixed cone is connected to the bottom of the bottom plate.

[0015] A method for using a bottom-mounted wave pressure-driven wave energy power generation device, wherein the bottom-mounted wave pressure-driven wave energy power generation device is arranged on the seabed surface according to the direction of waves, and the internal air pressure of the bottom-mounted wave pressure-driven wave energy power generation device is set to the static water pressure at the arrangement position; when waves pass and the pressure on the airbag increases, the gas in the airbag unidirectionally enters the interior of the shell from the air inlet and flows unidirectionally along a U-shaped gas flow channel, driving the impeller to rotate during the flow, and the impeller drives the power generation system to generate electricity, and the electric energy is sent out through the electric energy sending system, and as the pressure on the airbag decreases, the gas unidirectionally flowing along the U-shaped gas flow channel unidirectionally discharges from the air outlet into the airbag, and the gas drives the impeller to rotate continuously according to this cycle, thereby achieving continuous power generation. Beneficial Effects

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention utilizes the pressure change at the same underwater position during the wave peaks and valleys as power to drive the gas flow inside the device to generate electricity, thereby avoiding the energy loss caused by the current direct use of mechanical transmission structures, improving the utilization rate of wave potential energy, and enhancing the power generation effect.

[0018] 2. The device of the present invention can be directly placed on the seabed for use, relying on its own gravity to maintain structural stability. Compared with the prior art, the present invention has a simpler structure, is easy to implement, has a lower construction cost, does not occupy sea surface space, and is beneficial to the safety of ship navigation.

[0019] 3. The electric energy transmission system adopted in the present invention can effectively transmit the electric energy generated by the device through an external submarine cable. Compared with the existing submarine cable transmission solution, the technology of the present invention is more mature and has higher feasibility.

[0020] 4. The structure proposed by the present invention is simple, easy to manufacture, and can be manufactured in a modular manner. In addition, the device of the present invention can be used alone or in combination with a single power generation system monomer according to the required power generation, which is flexible and greatly expands the scope of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2It is a schematic diagram of the internal structure arrangement of the present invention;

[0024] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0025] Figure 4 It is an enlarged side view of the structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the top view arrangement of the present invention;

[0027] Figure 6 It is a schematic diagram of the side view arrangement of the present invention;

[0028] Figure 7 Schematic diagram of the internal structure of the present invention and the gas flow direction during operation (arrows indicate the gas flow direction);

[0029] Figure 8 It is another schematic diagram of the structure of the present invention;

[0030] Figure numerals: 1-base plate, 2-partition, 3-internal cable, 4-gear two, 5-generator, 6-gear one, 7-impeller, 8-channel partition, 9-external cable, 10-cable connecting member, 11-air bag, 12-lifting ear, 13-housing, 14-air inlet, 15-air outlet, 16-power generation system unit, 17-energy conversion device part, 18-electric energy delivery system part. Implementation

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0035] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] Embodiment 1. A bottom-mounted wave pressure-driven wave energy power generation device comprises an energy conversion system, in which a power generation system is arranged, and the power generation system is connected to an electric energy delivery system; the energy conversion system comprises a bottom plate 1, the bottom plate 1 is connected to a shell 13, a partition 2 is transversely arranged in the middle of the shell 13, and the partition 2 divides the internal space of the shell 13 into a transverse U-shaped gas flow channel; the shell 13 is provided with an air inlet 14 at the upper part of the U-shaped gas flow channel, and an air outlet 15 at the lower part; the air inlet 14 and the air outlet 15 are connected by an air bag 11 arranged on the outer wall of the shell 13; an impeller 7 is rotatably arranged in the U-shaped gas flow channel. Among them, the air bag 11 can be a rubber air bag. The energy conversion system is used to convert wave pressure into air kinetic energy.

[0038] Two air inlets 14 are respectively arranged on the left and right sides of the shell 13 at the upper part of the U-shaped gas flow channel; two air outlets 15 are respectively arranged at the lower part of the U-shaped gas flow channel, and the air outlets 15 and the air inlets 14 are arranged one by one up and down, and the corresponding air outlets 15 and the air inlets 14 are each connected through an air bag 11.

[0039] One-way gas valves are provided at the air inlet 14 and the air outlet 15. The one-way gas valves can realize the effect of one-way gas inlet and outlet of the air inlet 14 and the air outlet 15.

[0040] The power generation system includes a gear 1 6 coaxially arranged with the impeller 7, the gear 1 6 meshes with the gear 2 4, and the gear 2 4 is connected to the generator 5. The gear 1 6 is set as a large gear, and the gear 2 4 is set as a small gear. When the air impacts the impeller 7 to rotate, the gear 1 6 rotates accordingly and drives the gear 2 4 to rotate at a high speed, thereby driving the generator 5 to generate electricity.

[0041] The electric energy delivery system includes an internal cable 3 connected to the generator 5 , and the internal cable 3 is connected to the external cable 9 via a cable connecting member 10 arranged on the side wall of the upper shell 13 .

[0042] A lifting lug 12 is connected to the top of the housing 13. The lifting lug 12 is used for installation, maintenance, removal and other operations of the device.

[0043] The upper bottom plate 1 is provided with a weight-bearing rib. The weight-bearing rib structure is shown in FIG. Figure 2 Ballast ribs are used to increase the stability of the device.

[0044] The bottom of the bottom plate 1 is connected to a fixed cone. Figure 6 ; Fixing can be achieved by inserting the fixing cone into the seabed surface.

[0045] The outer cover of the power generation system is provided with a channel baffle 8. The channel baffle 8 is provided, and a gas channel is still reserved. The purpose of the channel baffle 8 is to reduce the passing surface of the gas when passing through the impeller 7, so that the gas is more concentrated, the flow rate of the gas flowing through the impeller is increased, and the efficiency of power generation is increased.

[0046] The working principle and use method of the device: The bottom-mounted wave pressure-driven wave energy power generation device is arranged on the seabed surface according to the wave direction, such as Figure 5 The internal air pressure of the device is set to the hydrostatic pressure at the arrangement position and the airbag 11 is filled with gas. The pressure at the position of the airbag 11 is distributed along the water depth as follows Figure 6 As shown, the calculation formula is , where ρ is the seawater density, g is the gravitational acceleration, z is the water depth, kz is the pressure sensitivity coefficient, and η is the wave surface equation. The first part on the right side of the equation is the static water pressure (the dotted line in the figure), and the second part is the dynamic water pressure caused by the waves. The previous calculation formula shows that the pressure at the position of the airbag 11 will vary with the wave phase. When the wave surface at the airbag 11 is above the sea level (dotted line), the pressure increases, and the gas enters through the one-way gas valve at the air inlet 14. When the wave surface at the airbag 11 is below the sea level (dotted line), the pressure on the airbag 11 decreases, and the internal air pressure of the device is greater. The internal gas of the device will be discharged into the airbag 11 through the one-way gas valve at the outlet 15. Specifically, when the wave continues to pass through the airbag 11, the pressure change will force the gas in the airbag 11 to enter the device from the inlet 14, and flow unidirectionally along the U-shaped gas flow channel. When flowing, it drives the impeller 7 to rotate, and through the gear rotation, it drives the generator 5 to generate electricity. Then the gas in the device is discharged from the outlet 15 into the airbag 11. According to this gas cycle, the impeller 7 continues to rotate to generate electricity, and the electrical energy is output through the internal cable 3 and the external cable 9.

[0047] Example 2. A bottom-mounted wave pressure-driven wave energy power generation device. This example is based on Example 1 and has the same working principle. The difference is that more air bags 11 are provided in this example. The structure can be referred to Figure 8 When waves pass by, the air intake of the airbag 11 from the air inlet 14 is large, and the air pressure in the upper part of the U-shaped gas flow channel, that is, the air pressure in the upper part of the partition 2 increases greatly. The gas can flow smoothly from the turning point of the U-shaped gas flow channel to the lower part of the partition 2, ensuring the fluidity of the gas, and the gas is discharged from the air outlet 15 into the airbag 11 to realize circulation. In the process, an impeller 7 is driven and electricity is generated through the generator 5, thereby increasing the power generation efficiency.

[0048] Embodiment 3. A bottom-mounted wave pressure driven wave energy power generation device. This embodiment is based on Embodiment 2, except that: in this embodiment, multiple sets of impellers 7 and generators 5 are arranged inside the device to increase the power generation.

[0049] Embodiment 4. A bottom-mounted wave pressure driven wave energy power generation device. In this embodiment, a large number of devices in any one of embodiments 1 to 3 are arranged on the seabed surface and connected with external cables to increase the power generation effect and realize large-scale power generation.

[0050] The circuits, electronic components and modules involved in this application are all prior art, and can be fully implemented by those skilled in the art. The above is only a preferred embodiment of this application and is not intended to limit this application. For those skilled in the art, this application can have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A method for using a bottom-mounted wave pressure-driven wave energy power generation device, characterized in that: A bottom-mounted wave pressure-driven wave energy power generation device is arranged on the seabed surface according to the direction of the waves, and the air pressure inside the device is set to be the hydrostatic pressure at the arrangement position; when the wave passes and the pressure of the airbag (11) increases, the gas in the airbag (11) enters the interior of the housing (13) from the air inlet (14) in one direction and flows in one direction along the U-shaped gas flow channel, driving the impeller (7) to rotate during the flow, and the impeller (7) drives the power generation system to generate electricity, and the electric energy is sent out through the electric energy sending system; as the pressure of the airbag (11) decreases, the gas flowing in one direction along the U-shaped gas flow channel is discharged in one direction from the air outlet (15) into the airbag (11), and the gas drives the impeller (7) to rotate continuously according to this cycle, thereby achieving continuous power generation; The bottom-mounted wave pressure-driven wave energy power generation device comprises an energy conversion system, wherein the energy conversion system is provided with a power generation system, and the power generation system is connected to the power delivery system; the energy conversion system comprises a bottom plate (1), the bottom plate (1) is connected to the outer shell (13), a partition plate (2) is transversely arranged in the middle of the outer shell (13), and the partition plate (2) divides the internal space of the outer shell (13) into a transverse U-shaped gas flow channel; the outer shell (13) is provided with an air inlet (14) at the upper part of the U-shaped gas flow channel, and an air outlet (15) at the lower part; the air inlet (14) and the air outlet (15) are connected via an air bag (11) arranged on the outer wall of the outer shell (13); and a rotating impeller (7) included in the power generation system is arranged in the U-shaped gas flow channel; The power generation system outer cover is provided with a channel partition (8).

2. The method for using the bottom-mounted wave pressure driven wave energy power generation device according to claim 1, characterized in that: A group of air inlets (14) are respectively arranged at the upper part of the U-shaped gas flow channel on the left and right sides of the housing (13), and a group of air outlets (15) are respectively arranged at the lower part of the U-shaped gas flow channel. The air outlets (15) and the air inlets (14) are arranged one by one up and down, and the corresponding air outlets (15) and the air inlets (14) are each connected via an air bag (11).

3. The method for using the bottom-mounted wave pressure driven wave energy power generation device according to claim 1, characterized in that: One-way gas valves are provided at the gas inlet (14) and the gas outlet (15).

4. The method for using the bottom-mounted wave pressure driven wave energy power generation device according to claim 1, characterized in that: The power generation system comprises a gear 1 (6) coaxially arranged with the impeller (7), the gear 1 (6) meshing with the gear 2 (4), and the gear 2 (4) connected to the generator (5).

5. The method for using the bottom-mounted wave pressure driven wave energy power generation device according to claim 4, characterized in that: The electric energy delivery system comprises an internal cable (3) connected to a generator (5), wherein the internal cable (3) is connected to an external cable (9) via a cable connection component (10) arranged on a side wall of an upper shell (13).

6. The method for using the bottom-mounted wave pressure driven wave energy power generation device according to claim 1, characterized in that: The top of the housing (13) is connected with a lifting ear (12).

7. The method for using the bottom-mounted wave pressure driven wave energy power generation device according to claim 1, characterized in that: The bottom plate (1) is provided with weight-bearing ribs.

8. The method for using the bottom-mounted wave pressure driven wave energy power generation device according to claim 1, characterized in that: The bottom of the base plate (1) is connected to a fixed cone.

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