A marine energy harvesting device based on piezoelectric effect

Abstract

The application discloses a kind of ocean energy collection devices based on piezoelectric effect, belong to energy collection technical field, including support assembly and with the power generation component of support assembly connection, the support assembly is used to support power generation component;The shaft assembly is matched on the power generation component, and the upper end of the shaft assembly is connected with floating body;The floating body is used to move up and down or horizontally with water wave, drive shaft assembly synchronous movement, make power generation component deformation to generate electricity.The ocean energy collection device provided by the application reduces the buoyancy device, adopts the structure that can collect the energy of the floating ball when it moves up and down and horizontally with wave, is more efficient compared with other ocean piezoelectric energy collection devices, realizes efficient ocean wave energy collection.The application can effectively improve the problems of low energy collection efficiency, easy to affect the activities of ships on the sea, insufficient adaptability when the direction of ocean current changes and other problems of the existing energy collection device based on ocean energy.

Description

Technical Field

[0001] This invention relates to the field of energy harvesting technology, and more specifically to a marine energy harvesting device based on the piezoelectric effect. Background Technology

[0002] With the continuous growth of energy demand and the increasing depletion of traditional fossil fuels, the demand for renewable energy is rising. Wave energy is a renewable energy source widely found in the ocean and is a very important form of ocean energy. Compared with solar and wind power, ocean waves can persist continuously under different weather conditions and seasons, offering higher energy density and a more stable supply. Therefore, wave energy harvesting technology has always been a hot topic in the field of ocean energy research.

[0003] In existing technologies, wave energy harvesting technology is mainly divided into two types: buoyancy-based wave energy harvesting technology and kinematic wave energy harvesting technology. Among them, the piezoelectric effect-based buoy-type ocean wave energy harvesting device is a device that utilizes the piezoelectric effect to harvest ocean wave energy and convert it into electrical energy. It typically consists of a buoy and a piezoelectric material above the buoy, specifically including the buoy, piezoelectric material, converter, and connecting devices. The buoy is usually cylindrical and made of corrosion-resistant marine materials; above the buoy, the piezoelectric material is fixed to a series of supports, allowing it to move in the waves. When ocean waves pass over the buoy, the buoy undulates with the waves, exerting a force on the piezoelectric material, causing it to deform and generate an electric charge. These charges are transferred to the converter through the connecting devices and then converted into usable electrical energy. However, existing buoy-type ocean wave energy harvesting devices have the following problems in practical use:

[0004] 1. Existing buoy-type marine energy harvesting devices need to operate on the sea surface, which will have a certain impact on ships sailing on the sea surface, especially on ship and navigation safety. The installation and operation of these devices may interfere with their navigation paths and routes, causing negative impacts.

[0005] 2. Existing buoy-type marine energy harvesting devices can only collect energy when the buoy is bobbing up and down, and cannot effectively collect energy when the buoy is moving horizontally, resulting in low energy harvesting efficiency;

[0006] 3. Existing buoy-based ocean energy harvesting devices require a large number of buoyancy devices to support the entire system, and these buoyancy devices will cause hydrodynamic resistance. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides a piezoelectric effect-based ocean energy harvesting device, aiming to solve the problems of low energy harvesting efficiency, easy interference with ship activities at sea, and insufficient adaptability to changes in ocean current direction in existing ocean energy harvesting devices. To achieve the above objectives, this invention provides the following technical solution:

[0008] A marine energy harvesting device based on the piezoelectric effect includes a support assembly and a power generation assembly connected to the support assembly. The support assembly supports the power generation assembly. A rotating shaft assembly is fitted onto the power generation assembly, and a floating body is connected to the upper end of the rotating shaft assembly. When the floating body moves up and down or horizontally with the water waves, it drives the rotating shaft assembly to move synchronously, causing the power generation assembly to deform and generate electricity.

[0009] Furthermore, the rotating shaft assembly includes a vertically arranged main shaft and a slave shaft fixedly connected to the upper end of the main shaft, the main shaft and the slave shaft being arranged vertically; the power generation assembly includes at least one set of horizontally arranged first power generation units; the lower end of the main shaft is connected to the first power generation units; the first power generation units are connected to the support assembly; the end of the slave shaft is connected to the floating body.

[0010] Furthermore, the first power generation unit includes a central ring and a plurality of first piezoelectric support plates; a bearing is fitted inside the central ring; the lower end of the main shaft passes through the bearing and is connected to the first power generation unit; the first end of the first piezoelectric support plate is fixedly connected to the side wall of the central ring, and the second end of the first piezoelectric support plate is connected to the support assembly; a first piezoelectric sheet is provided on the first piezoelectric support plate.

[0011] Furthermore, the power generation assembly also includes a vertically arranged second power generation unit; the second power generation unit includes a plurality of second piezoelectric support plates; the first end of the second piezoelectric support plate is fixedly connected to the upper end of the main shaft, and the second end of the second piezoelectric support plate is suspended; the second piezoelectric support plate is provided with a second piezoelectric sheet.

[0012] Furthermore, the support assembly includes a carrying cover; a plurality of support columns for supporting the carrying cover are vertically connected to the lower surface of the carrying cover; the lower end of the main shaft extends into the underside of the carrying cover; the support columns correspond one-to-one with the first piezoelectric sheet support plate; the second end of the first piezoelectric sheet support plate is connected to the support columns.

[0013] Furthermore, a column retaining ring is fitted onto the supporting column; the column retaining ring corresponds one-to-one with the first piezoelectric sheet support plate; the column retaining ring is used to restrict the movement of the first piezoelectric sheet support plate within a certain range.

[0014] Furthermore, a crossbar connects adjacent support columns; a load-bearing chassis is provided at the bottom of each support column.

[0015] Furthermore, a load-bearing tray is fixedly connected below the first power generation unit.

[0016] Furthermore, the floating body includes a buoy, which is connected to the end of the shaft via a connecting rope.

[0017] The beneficial effects of this invention are:

[0018] 1. The present invention provides a marine energy harvesting device based on the piezoelectric effect, which uses piezoelectric energy harvesting. Piezoelectric materials can directly convert mechanical energy into electrical energy, avoiding complex power generation structures and improving energy conversion efficiency;

[0019] 2. The present invention provides a marine energy harvesting device based on the piezoelectric effect, which has a simple structure, consisting of only a buoy and a seabed piezoelectric energy harvesting device. It is not limited by terrain during installation, does not occupy too much sea surface, and has a simple and compact structure, thus achieving the purpose of easy installation and convenient maintenance.

[0020] 3. The present invention provides a marine energy harvesting device based on the piezoelectric effect, which reduces the buoyancy device and adopts a structure that can simultaneously collect the energy of the buoy as it moves up and down with the waves and moves horizontally. Compared with other marine piezoelectric energy harvesting devices, it is more efficient and achieves efficient marine wave energy harvesting.

[0021] 4. The present invention provides a marine energy harvesting device based on the piezoelectric effect, which adopts an automatically adjustable steering structure. This structure can adjust according to the direction of the ocean current monitored in real time, so that the energy harvester can always face the flowing ocean current, thereby maximizing the capture and utilization of ocean kinetic energy and improving energy harvesting efficiency.

[0022] 5. The present invention provides a marine energy harvesting device based on the piezoelectric effect, which adopts a modular connection design, dividing the energy harvesting device into multiple independent modules. Each module has detachable connectors, making the assembly and disassembly of the energy harvesting device more convenient and free. This allows the energy harvesting device to flexibly adjust the number of piezoelectric support according to actual needs, so as to capture the energy in the ocean to the greatest extent. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a marine energy harvesting device based on the piezoelectric effect provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the power generation component structure of a marine energy harvesting device based on the piezoelectric effect provided by the present invention;

[0025] Figure 3This is a schematic diagram of the support component structure of a marine energy harvesting device based on the piezoelectric effect provided by the present invention;

[0026] Figure 4 This is a schematic diagram of the first power generation unit structure of a marine energy harvesting device based on the piezoelectric effect provided by the present invention;

[0027] In the attached diagram: 1-Floating body, 2-Main shaft, 3-Slave shaft, 4-Central ring, 5-First piezoelectric support plate, 6-Bearing, 7-First piezoelectric sheet, 8-Second piezoelectric support plate, 9-Second piezoelectric sheet, 10-Load cover, 11-Support column, 12-Column retaining ring, 13-Crossbar, 14-Load-bearing chassis, 15-Load-bearing pallet. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0029] Example 1:

[0030] See attached Figures 1-4 A piezoelectric effect-based marine energy harvesting device includes a support assembly and a power generation assembly connected to the support assembly. The support assembly supports the power generation assembly. A rotating shaft assembly is fitted onto the power generation assembly, and a floating body 1 is connected to the upper end of the rotating shaft assembly. When the floating body 1 moves up and down or horizontally with the water waves, it drives the rotating shaft assembly to move synchronously, causing the power generation assembly to deform and generate electricity. From the above structure, it can be seen that the piezoelectric effect-based marine energy harvesting device provided by this invention... Figure 1As shown, the device includes a support assembly, a power generation assembly, a rotating shaft assembly, and a floating body 1. The support assembly is fixed to the seabed and supports and connects the power generation assembly. The rotating shaft assembly is connected to the power generation assembly, meaning one end of the power generation assembly is connected to the support assembly and the other end is connected to the rotating shaft assembly. For example, the power generation assembly can use a piezoelectric element based on the piezoelectric effect, and it can include horizontally and vertically arranged piezoelectric elements. The floating body 1, connected to the upper end of the rotating shaft assembly, has buoyancy and can float up and down or move horizontally with the waves. During operation, the marine energy harvesting device of this invention is placed on the seabed, and the floating body 1 floats on the sea surface due to the buoyancy of the seawater. When the floating body 1 rises and falls with the waves, it drives the rotating shaft assembly connected to it to move up and down as well. The support assembly is fixed to the seabed and does not rise and fall with the waves. Therefore, under the action of the undulating waves, the rotating shaft assembly and the support assembly have relative displacement in the vertical direction. The rotating shaft assembly drives the power generation assembly connected to the support assembly to vibrate up and down, causing the horizontal power generation element on the power generation assembly to deform and generate an electric charge. When the floating body 1 moves horizontally with the ocean waves, it drives the connected rotating shaft assembly to rotate, causing the vertically positioned piezoelectric plate to deform and generate an electric charge. This invention provides a piezoelectric-based ocean energy harvesting device with a simple structure, comprising a floating body 1, a power generation component, a rotating shaft assembly, and a support assembly located below the sea surface. Installation is not limited by terrain, does not occupy excessive sea surface area, and its simple and compact structure facilitates installation and maintenance.

[0031] Example 2:

[0032] See attached Figures 1-4 Based on Embodiment 1, the rotating shaft assembly includes a vertically arranged main shaft 2 and a slave shaft 3 fixedly connected to the upper end of the main shaft 2, the main shaft 2 and the slave shaft 3 being vertically arranged; the power generation assembly includes at least one set of horizontally arranged first power generation units; the lower end of the main shaft 2 is connected to the first power generation unit; the first power generation unit is connected to the support assembly; the end of the slave shaft 3 is connected to the floating body 1. From the above structure, it can be seen that, as... Figure 2 As shown, the rotating shaft assembly comprises two parts: a vertically arranged main shaft 2 and a horizontally arranged slave shaft 3. The main shaft 2 and the slave shaft 3 intersect at right angles and are connected together, forming an inverted L-shape. The main shaft 2 is used to transmit power and torque, while the slave shaft 3 is used to receive rotation. The end of the slave shaft 3 is connected to the floating body, for example, via a rope made of corrosion-resistant material. As the floating body 1 rises and falls and moves left and right, the position of the slave shaft 3 changes, transmitting ocean wave energy. Specifically, the power generation assembly includes at least one set of horizontally arranged first power generation units, such as... Figure 2 As shown, Figure 2The diagram illustrates a configuration comprising three sets of first power generation units. The lower end of the main shaft 2 is connected to the first power generation units, and the three first power generation units are spaced apart along the axis of the main shaft 2. When the floating body 1 moves up and down, it drives the driven shaft 3 to move up and down. Since the main shaft 2 is connected to the driven shaft 3, the main shaft 2 also moves up and down synchronously, thereby driving the horizontally positioned first power generation units to move up and down. The support assembly is fixed to the seabed, restricting the movement of one end of the first power generation unit connected to the support assembly. Therefore, under the combined action of the main shaft 2 and the support assembly, deformation occurs on the horizontally positioned first power generation unit, thereby generating an electric charge.

[0033] The first power generation unit includes a central ring 4 and several first piezoelectric support plates 5; a bearing 6 is fitted inside the central ring 4; the lower end of the main shaft 2 passes through the bearing 6 and is connected to the first power generation unit; the first end of the first piezoelectric support plate 5 is fixedly connected to the side wall of the central ring 4, and the second end of the first piezoelectric support plate 5 is connected to the support assembly; a first piezoelectric sheet 7 is provided on the first piezoelectric support plate 5. From the above structure, it can be seen that, specifically, as... Figure 2 and Figure 4 As shown, the first power generation unit includes a central ring 4 and several first piezoelectric support plates 5 fixedly connected around the central ring 4. The central ring 4 and the first piezoelectric support plates 5 can also be integrally formed. The end of the first piezoelectric support plate 5 closest to the central ring 4 is the first end, and the end of the first piezoelectric support plate 5 furthest from the central ring 4 is the second end. The second end of the first piezoelectric support plate 5 is connected to a support assembly. The specific number of the first power generation unit and the first piezoelectric support plates 5 can be determined according to the actual situation. A bearing 6 is fitted inside the central ring 4, and the first power generation unit is rigidly connected to the main shaft 2 along the axial direction of the main shaft 2 through the bearing 6. The bearing 6 can be a ball bearing, used to reduce friction and support the rotation of the main shaft 2. When the floating body 1 moves up and down, it drives the driven shaft 3 and the main shaft 2 to move up and down. The first end of the first piezoelectric support plate 5 moves up and down synchronously with the main shaft 2. The second end of the first piezoelectric support plate 5, because it is connected to the support assembly, does not move up and down with the main shaft 2 or only moves up and down slightly. Therefore, under the combined action of the main shaft 2 and the support assembly, the two ends of the first piezoelectric support plate 5 are subjected to forces in different directions, causing the first piezoelectric sheet 7 on the first piezoelectric support plate 5 to deform, thereby generating an electric charge.

[0034] The power generation assembly further includes a vertically arranged second power generation unit; the second power generation unit includes several second piezoelectric support plates 8; the first end of the second piezoelectric support plate 8 is fixedly connected to the upper end of the main shaft 2, and the second end of the second piezoelectric support plate 8 is suspended; a second piezoelectric sheet 9 is provided on the second piezoelectric support plate 8. As can be seen from the above structure, specifically, the power generation assembly further includes a vertically arranged second power generation unit, which includes several second piezoelectric support plates 8. The specific number of second piezoelectric support plates 8 can be determined according to the actual situation. The first end of the second piezoelectric support plate 8 is connected to the upper end of the main shaft 2, and the second piezoelectric support plate 8 extends in a direction perpendicular to the axial direction of the main shaft 2. Several second piezoelectric support plates 8 can be arranged sequentially from top to bottom along the axial direction of the main shaft 2, preferably, they can be equidistantly arranged along the axial direction of the main shaft 2. When the floating body 1 moves horizontally on the sea surface under the action of ocean waves, the main shaft 2 and the first power generation unit are connected by the bearing 6. Therefore, the floating body 1 drives the driven shaft 3 and the main shaft 2 to rotate synchronously. When the main shaft 2 rotates, it also drives the second piezoelectric support plate 8 to rotate synchronously. Since the second end of the second piezoelectric support plate 8 is suspended, the second piezoelectric support plate 8 is subjected to the resistance of the seawater when rotating, causing the second piezoelectric sheet 9 on the second piezoelectric support plate 8 to deform, thereby generating an electric charge. The piezoelectric effect-based ocean energy harvesting device provided by this invention reduces the buoyancy device and adopts a structure that can simultaneously collect the energy of the buoy as it moves up and down with the waves and moves horizontally. Compared with other ocean piezoelectric energy harvesting devices, it is more efficient and achieves efficient ocean wave energy harvesting.

[0035] Example 3:

[0036] See attached Figures 1-4Based on Embodiment 2, the support assembly includes a carrying cover 10; several support columns 11 for supporting the carrying cover 10 are vertically connected to the lower surface of the carrying cover 10; the lower end of the main shaft 2 extends below the carrying cover 10; the support columns 11 correspond one-to-one with the first piezoelectric support plate 5; the second end of the first piezoelectric support plate 5 is connected to the support column 11. As can be seen from the above structure, the support assembly includes a carrying cover 10 and several support columns 11. The carrying cover 10 is horizontally arranged and can be used to place a battery or load. The upper ends of the several support columns 11 are vertically connected to the lower surface of the carrying cover 10, and the lower ends of the support columns 11 are located on the seabed. A through hole can be provided on the carrying cover 10 for the main shaft 2 to pass through. The portion of the main shaft 2 located below the carrying cover 10 is the lower end of the main shaft 2, and the portion of the main shaft 2 located above the carrying cover 10 is the upper end of the main shaft 2. The first power generation unit is connected to the lower end of the main shaft 2 through a bearing 6. The support column 11 and the first piezoelectric support plate 5 correspond one-to-one. The second end of the first piezoelectric support plate 5 is connected to the support column 11. For example, a connecting ring can be provided on the second end of the first piezoelectric support plate 5. The connecting ring includes a left connecting part and a right connecting part that cooperate with each other. The left connecting part and the right connecting part cooperate to surround the support column 11. One end of the left connecting part and the right connecting part are respectively fixed to the second end of the first piezoelectric support plate 5, and the other end of the left connecting part and the right connecting part can be fixed together by screws. During installation, the screws are loosened, the left connecting part and the right connecting part are fitted onto the outer wall of the support column 11, and then fixed by screws, which also makes installation and disassembly simple. The floating body 1 rises and falls with the ocean waves, while the cargo cover 10 and the support column 11 fix the ocean energy harvesting device to the seabed, so that the support frame assembly does not rise and fall with the waves. Therefore, under the action of the rising and falling waves, the rotating shaft assembly and the support frame assembly are relatively displaced in the vertical direction, so that the rotating shaft assembly drives the first power generation unit sleeved on the support column 11 to start to rise and fall and vibrate. The first piezoelectric sheet 7 fixed on the first piezoelectric sheet support plate 5 deforms and generates charge.

[0037] A column retaining ring 12 is fitted onto the supporting column 11; the column retaining ring 12 corresponds one-to-one with the first piezoelectric sheet support plate 5; the column retaining ring 12 is used to restrict the movement of the first piezoelectric sheet support plate 5 within a certain range. From the above structure, it can be seen that... Figure 1 As shown, each support column 11 has several column retaining rings 12 fitted on its outer wall. The column retaining rings 12 are located below the connection between the first piezoelectric support plate 5 and the support column 11. The range between two adjacent column retaining rings 12 and between the column retaining ring 12 at the uppermost end of the support column 11 and the load cover 10 forms a range that restricts the movement of the first piezoelectric support plate 5. Preferably, the column retaining rings 12 are equidistantly arranged along the axial direction of the support column 11.

[0038] A crossbar 13 connects adjacent supporting columns 11; a load-bearing base 14 is provided at the bottom of each supporting column 11. From the above structure, it can be seen that... Figure 3 As shown, adjacent support columns 11 are connected by a crossbar 13 to ensure the stability of the entire device. Each support column 11 is equipped with a load-bearing base 14 at its bottom. The load-bearing base 14 increases the stress-bearing area, which allows the marine energy harvesting device to be more firmly fixed to the seabed surface.

[0039] A load-bearing tray 15 is fixedly connected to the bottom of the first power generation unit. As can be seen from the above structure, if... Figure 1 and Figure 2 As shown, each first power generation unit is provided with a load-bearing tray 15. Preferably, the load-bearing tray 15 is a hollow ring. The load-bearing tray 15 can be connected to the first piezoelectric support plate 5 by screws. The load-bearing tray 15 can assist the first piezoelectric support plate 5 in its up-and-down movement, improving the stability of the mechanical structure of the present invention.

[0040] The floating body 1 includes a buoy, which is connected to the end of the slave shaft 3 via a connecting rope. As can be seen from the above structure, the floating body 1 is a buoyant spherical object, which can be made of plastic or metal, and is connected to one end of the slave shaft 3 via a connecting rope made of corrosion-resistant material. As the buoy rises and falls and moves left and right, it changes the position of the main shaft 2 and the slave shaft 3, thereby transmitting ocean wave energy.

[0041] When generating electricity using the piezoelectric effect-based marine energy harvesting device provided by this invention, the working process is as follows: First, the entire device is placed on the seabed, with the buoy above the sea surface due to the buoyancy of the seawater. The buoy rises and falls with the waves, while the load-bearing chassis 14 fixes the marine energy harvesting device to the seabed, preventing the support frame assembly from rising and falling with the waves. Therefore, under the action of the rising and falling waves, the rotating shaft assembly and the support frame assembly undergo relative displacement in the vertical direction, causing the rotating shaft assembly to drive the first power generation unit, which is sleeved on the support column 11, to begin to vibrate up and down. The first piezoelectric sheet 7, fixed on the first piezoelectric sheet support plate 5, deforms and generates an electric charge. When the buoy moves horizontally on the sea surface, it can drive the rotating shaft assembly to rotate, causing the second power generation unit to start to rotate. The second piezoelectric sheet 9, fixed on the second piezoelectric sheet support plate 8, deforms and generates an electric charge. The electric charge can be led out by insulated wires and finally collected in the energy storage device for storage.

[0042] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A marine energy harvesting device based on the piezoelectric effect, characterized in that: It includes a support component and a power generation component connected to the support component. The support component is used to support the power generation component. A rotating shaft component is fitted on the power generation component. A floating body (1) is connected to the upper end of the rotating shaft component. The floating body (1) is used to drive the rotating shaft component to move synchronously when it moves up and down or horizontally with the water waves, so that the power generation component deforms and generates electricity. The rotating shaft assembly includes a vertically arranged main shaft (2) and a slave shaft (3) fixedly connected to the upper end of the main shaft (2), the main shaft (2) and the slave shaft (3) being arranged vertically; the power generation assembly includes at least one set of horizontally arranged first power generation units; the lower end of the main shaft (2) is connected to the first power generation units; the first power generation units are connected to the support assembly; the end of the slave shaft (3) is connected to the floating body (1); the floating body (1) includes a float, the float being connected to the end of the slave shaft (3) via a connecting rope; The first power generation unit includes a central ring (4) and several first piezoelectric support plates (5); a bearing (6) is fitted inside the central ring (4); the lower end of the main shaft (2) passes through the bearing (6) and is connected to the first power generation unit; the first end of the first piezoelectric support plate (5) is fixedly connected to the side wall of the central ring (4), and the second end of the first piezoelectric support plate (5) is connected to the support assembly; a first piezoelectric sheet (7) is provided on the first piezoelectric support plate (5). The power generation assembly also includes a vertically arranged second power generation unit; the second power generation unit includes several second piezoelectric support plates (8); the first end of the second piezoelectric support plate (8) is fixedly connected to the upper end of the main shaft (2), and the second end of the second piezoelectric support plate (8) is suspended; the second piezoelectric plate (9) is provided on the second piezoelectric support plate (8).

2. The ocean energy harvesting device based on the piezoelectric effect according to claim 1, characterized in that: The support assembly includes a carrying cover (10); a plurality of support columns (11) for supporting the carrying cover (10) are vertically connected to the lower surface of the carrying cover (10); the lower end of the main shaft (2) extends into the underside of the carrying cover (10); the support columns (11) and the first piezoelectric sheet support plate (5) correspond one-to-one; the second end of the first piezoelectric sheet support plate (5) is connected to the support columns (11).

3. A marine energy harvesting device based on the piezoelectric effect according to claim 2, characterized in that: The support column (11) is fitted with a column retaining ring (12); the column retaining ring (12) corresponds one-to-one with the first piezoelectric sheet support plate (5); the column retaining ring (12) is used to restrict the first piezoelectric sheet support plate (5) from moving within a certain range.

4. A marine energy harvesting device based on the piezoelectric effect according to claim 2, characterized in that: A crossbar (13) is connected between adjacent support columns (11); a load-bearing chassis (14) is provided at the bottom of the support column (11).

5. A marine energy harvesting device based on the piezoelectric effect according to claim 1, characterized in that: A load-bearing tray (15) is fixedly connected to the bottom of the first power generation unit.

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