Wave energy collecting device for open sea

Abstract

The utility model discloses a wave energy collecting device for an open sea. Comprising a buoy shell, a mass block, a dielectric elastomer capacitor and an electric energy collection circuit, a rigid supporting disc is arranged on the upper middle portion of an inner cavity of the buoy shell, and the dielectric elastomer capacitor is fixed to a circular mounting hole formed in the middle of the rigid supporting disc. The dielectric elastomer capacitor comprises a dielectric elastomer film and flexible electrodes arranged on the two sides of the surface of the dielectric elastomer film. A first mass block and a second mass block are arranged in the middle of the dielectric elastomer capacitor. The first mass block is connected with the upper end face of the dielectric elastomer capacitor and the top of a cavity of the buoy shell through a first spring. The second mass block is connected with the lower end surface of the dielectric elastomer capacitor and a rigid support rod below the dielectric elastomer capacitor through a second spring; the electric energy collection circuit is connected with the flexible electrodes on the two sides of the surface of the dielectric elastomer film. The device is simple in structure and can be suitable for collection of open sea wave energy to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of ocean energy utilization, and more specifically to a wave energy collection device used in the open sea. Background Art

[0002] In recent years, the world's energy demand has increased significantly. Many traditional energy sources are non-renewable and highly polluting, causing environmental problems such as greenhouse effect, acid rain, and photochemical smog. The development and utilization of new energy sources is imminent. Wave energy is another important alternative clean energy after onshore wind power, solar energy, and biomass energy.

[0003] The mechanical transmission system of existing wave energy generators (such as oscillating water column type, water flow type and mechanical type) has a complex structure, resulting in high maintenance costs, which brings certain problems to wave energy collection, especially ocean wave energy collection. Utility Model Content

[0004] In view of the shortcomings of the prior art, especially the complex structure of the mechanical transmission system of the existing wave energy generator, the utility model provides a wave energy collection device suitable for the open sea.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A wave energy collection device suitable for use in the open sea, comprising: a buoy shell, a mass block, a dielectric elastomer capacitor and an electric energy collection circuit;

[0007] A rigid support disc is provided in the middle upper part of the inner cavity of the buoy shell, the outer edge of the rigid support disc is embedded in the inner wall of the buoy shell, a circular mounting hole is provided in the middle of the rigid support disc, and the dielectric elastomer capacitor is fixed on the circular mounting hole;

[0008] The dielectric elastomer capacitor comprises a dielectric elastomer film and flexible electrodes arranged on both sides of the surface of the dielectric elastomer film; a mass block is arranged in the middle of the dielectric elastomer capacitor, and the mass block comprises a first mass block and a second mass block, the first mass block is connected to the upper end surface of the dielectric elastomer capacitor and the top of the cavity of the buoy shell through a first spring; the second mass block is connected to the lower end surface of the dielectric elastomer capacitor and a rigid support rod below the dielectric elastomer capacitor through a second spring, and both ends of the rigid support rod are fixed to the inner wall of the cavity of the buoy shell;

[0009] The electric energy collection circuit is fixed on the rigid support disk and connected to the flexible electrodes arranged on both sides of the surface of the dielectric elastomer film.

[0010] Preferably, the outer shape of the buoy shell is a spindle-like structure with a flat bottom and a smooth upper and middle part.

[0011] Preferably, the buoy shell comprises a buoy shell made of plastic material.

[0012] Preferably, the first mass block and the second mass block are cylinders with the same mass and volume, and the centers of the first mass block and the second mass block arranged on the upper and lower sides of the dielectric elastomer capacitor are perpendicular to each other.

[0013] Preferably, the plane where the dielectric elastomer film of the dielectric elastomer capacitor is located is perpendicular to the movement direction of the mass block.

[0014] Preferably, the first mass block and the second mass block are both configured as magnetic cylindrical blocks.

[0015] Preferably, the dielectric elastomer film comprises a vhb9469 film.

[0016] Preferably, the electric energy collection circuit includes a charge pump circuit and an electret electrostatic voltage source;

[0017] The charge pump circuit is connected in parallel with the dielectric elastomer capacitor;

[0018] The charge pump circuit includes five diodes D1, D2, D3, D4 and D5 connected end to end in sequence, and four capacitors C1, C2, C3 and C4; wherein the cathode of the diode D1 is simultaneously connected to one end of the dielectric elastomer capacitor and the anode of the electret electrostatic voltage source, and the anode of the diode D5 is simultaneously connected to the other end of the dielectric elastomer capacitor and the cathode of the electret electrostatic voltage source; one end of the first capacitor C1 is connected to the anode of the diode D2, and the other end is connected to the anode of the electret electrostatic voltage source; one end of the second capacitor C2 is connected to the cathode of the diode D2, and the other end is connected to the cathode of the electret electrostatic voltage source; one end of the third capacitor C3 is connected to the anode of the diode D4, and the other end is connected to the anode of the electret electrostatic voltage source; one end of the fourth capacitor C4 is connected to the cathode of the diode D4, and the other end is connected to the cathode of the electret electrostatic voltage source.

[0019] Preferably, a fast recovery diode FRD is connected in parallel between the positive and negative electrodes of the electret electrostatic voltage source, the positive electrode of the fast recovery diode FRD is connected to the negative electrode of the electret electrostatic voltage source, and the negative electrode of the fast recovery diode FRD is connected to the positive electrode of the electret electrostatic voltage source.

[0020] It can be seen from the above technical solutions that, compared with the prior art, the utility model discloses a wave energy collection device suitable for offshore, which has the following beneficial effects:

[0021] The new device is composed of a spring, a dielectric elastomer film, a flexible electrode, a mass block, etc. The mass block drives the dielectric elastomer film to deform to generate electrical energy. It has a simple structure and low cost, and can be suitable for the collection of offshore wave energy to a certain extent.

[0022] The new model adopts a spindle-like body as a whole, has excellent structural design and good sealing performance.

[0023] The shell of the novel buoy is made of plastic material, which has better corrosion resistance than metal shell.

[0024] In the process of converting wave energy into electrical energy, the electrons move back and forth between the capacitor and the charge pump circuit, getting rid of the traditional DC working mode of applied voltage and achieving passivity, which is very suitable for offshore self-powered systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 The utility model provides an overall structural schematic diagram.

[0027] Figure 2 The utility model is provided for the overall structure section schematic diagram.

[0028] Figure 3 This is a schematic diagram of the electric energy collection circuit provided by the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The utility model discloses a wave energy collection device suitable for offshore, such as Figure 1 , Figure 2As shown, it includes: a buoy shell 1, a mass block 4, a dielectric elastomer capacitor 3 and an electric energy collection circuit 8. A rigid support disk 2 is arranged in the upper middle part of the inner cavity of the buoy shell 1, the outer edge of the rigid support disk 2 is embedded in the inner wall of the buoy shell 1, and a circular mounting hole is arranged in the middle of the rigid support disk 2. The dielectric elastomer capacitor 3 is fixed on the circular mounting hole in the middle of the rigid support disk 2. The dielectric elastomer capacitor 3 is mainly composed of a dielectric elastomer film and flexible electrodes arranged on both sides of the surface of the dielectric elastomer film. Usually, the flexible electrodes are arranged on both sides of the surface of the dielectric elastomer film as electrode layers; a mass block 4 is arranged in the middle of the dielectric elastomer capacitor 3. The mass block 4 includes a first mass block 401 and a second mass block 402. The bottom of the first mass block 401 is connected to the upper end surface of the dielectric elastomer capacitor 3, and the top of the first mass block 401 is connected to the top of the cavity of the buoy shell 1 through the first spring 5; the top of the second mass block 402 is connected to the lower end surface of the dielectric elastomer capacitor 3, and the bottom of the second mass block 402 is connected to the rigid support rod 7 below the dielectric elastomer capacitor 3 through the second spring 6, and the two ends of the rigid support rod 7 are fixed to the inner wall of the cavity of the buoy shell 1; the energy collection circuit 8 is fixed on the rigid support disk 2 and connected to the flexible electrodes arranged on both sides of the surface of the dielectric elastomer film.

[0031] The working principle of the utility model is:

[0032] The wave energy collection device is placed in the ocean. It moves up and down with the waves. The mass block inside it drives the springs on both sides to move up and down due to inertia. At the same time, the dielectric elastic film produces stretching-contraction deformation, causing the capacitance of the dielectric elastomer capacitor 3 to change.

[0033] The dielectric elastomer capacitor 3 is a flexible capacitor composed of a flexible film and a deformable conductive electrode. It has the advantages of good flexibility, impact resistance, high energy density, easy processing, low noise, etc., and is suitable for a wide range of wave energy collection.

[0034] As a preferred embodiment, when the frequency of the wave is equal to the natural frequency of the spring, resonance occurs, and the deformation degree of the dielectric elastomer film is optimal at this time. The principle is as follows:

[0035] The natural frequency of the spring is f k express Where k is the spring constant, m is the mass of the mass block, and the frequency of the wave is f b express Where g is the acceleration due to gravity and V is the wave velocity. k =f b Resonance occurs when the dielectric elastomer film is deformed to the best degree. The voltage generated in the energy collection circuit is the largest at this time, and can generate a maximum voltage of several thousand volts.

[0036] As a preferred embodiment, the outer shape of the buoy housing 1 adopts a spindle-like structure with a flat bottom and a smooth upper and middle part.

[0037] As a preferred embodiment, the buoy housing 1 is made of plastic.

[0038] As a preferred embodiment, the first mass block 401 and the second mass block 402 are cylinders with the same mass and volume, and the centers of the first mass block 401 and the second mass block 402 disposed on the upper and lower sides of the dielectric elastomer capacitor 3 are perpendicular to each other.

[0039] As a preferred embodiment, the first mass block 401 and the second mass block 402 are both configured as magnetic cylindrical blocks, and the first mass block 401 and the second mass block 402 are attached to the upper and lower sides of the dielectric elastomer capacitor 3 by mutual magnetic attraction.

[0040] As a preferred embodiment, the dielectric elastomer film 3 may specifically be a vhb9469 film, which has a lower elastic modulus and is easier to deform upon vibration.

[0041] As a preferred embodiment, the plane where the dielectric elastomer film of the dielectric elastomer capacitor 3 is located is perpendicular to the movement direction of the mass block 4 .

[0042] like Figure 3 As shown, in any of the above embodiments, the electric energy collection circuit 8 includes a charge pump circuit 002 and an electret electrostatic voltage source 003;

[0043] The charge pump circuit 002 is connected in parallel with the dielectric elastomer capacitor 3; the charge pump circuit 002 includes five diodes D1, D2, D3, D4 and D5 connected end to end, and four capacitors C1, C2, C3 and C4; the cathode of the diode D1 is simultaneously connected to one end of the dielectric elastomer capacitor 3 and the anode of the electret electrostatic voltage source 003, and the anode of the diode D5 is simultaneously connected to the other end of the dielectric elastomer capacitor 3 and the cathode of the electret electrostatic voltage source 003. One end of the first capacitor C1 is connected to the anode of the diode D2, and the other end is connected to the anode of the electret electrostatic voltage source 003; one end of the second capacitor C2 is connected to the cathode of the diode D2, and the other end is connected to the cathode of the electret electrostatic voltage source 003; one end of the third capacitor C3 is connected to the anode of the diode D4, and the other end is connected to the anode of the electret electrostatic voltage source 003; one end of the fourth capacitor C4 is connected to the cathode of the diode D4, and the other end is connected to the cathode of the electret electrostatic voltage source 003.

[0044] As a preferred embodiment, a fast recovery diode FRD is connected in parallel between the positive and negative electrodes of the electret electrostatic voltage source 003, the positive electrode of the fast recovery diode FRD is connected to the negative electrode of the electret electrostatic voltage source 003, and the negative electrode of the fast recovery diode FRD is connected to the positive electrode of the electret electrostatic voltage source 003.

[0045] In the present invention, an electret electrostatic voltage source (EEVS) is generated by injecting electric charges into an electret using a high voltage, and the electret can be made of a tetrafluoroethylene (PTFE) film.

[0046] In a specific embodiment, the electret electrostatic voltage source EEVS is composed of a tetrafluoroethylene film (electret) sandwiched between two layers of aluminum plates. The two layers of aluminum plates respectively constitute two electrodes of the electret electrostatic voltage source EEVS, which can induce opposite charges.

[0047] In the above embodiment, if Figure 3 As shown, the output end of the electret electrostatic voltage source 003 is connected to the charge pump circuit 002 after passing through the bridge rectifier circuit 004 .

[0048] When the dielectric elastomer film is deformed, the voltage of the dielectric elastomer capacitor (DEC) 3 changes, and the voltage value decreases with the degree of deformation. If the deformation voltage of the dielectric elastomer capacitor is lower than the voltage value of the charge pump capacitor, the charge stored in the circuit flows from the circuit to DEC (left part). Conversely, if the voltage on both sides of DEC is higher than the voltage of the low capacitor in the circuit, part of the charge stored in DEC flows from DEC to the charge pump circuit. That is, during the reciprocating deformation process of DEC, the charge reciprocates between DEC and the charge pump circuit, generating alternating current.

[0049] As a preferred embodiment, a rectifier bridge 005 is added to the power collection circuit to convert the collected AC power into DC power, which can be used to charge the battery and then used for offshore lighting or powering sensors to achieve offshore environmental monitoring. At this time, in order to ensure the overall sealing of the wave energy collection device, it is necessary to strictly seal the lead-out port of the power collection circuit inside the device after the lead-out wiring is connected to the device.

[0050] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wave energy collection device for use in the open sea, characterized in that: include: buoy housing, mass, dielectric elastomer capacitor, and electrical energy harvesting circuit; A rigid support disc is provided in the middle upper part of the inner cavity of the buoy shell, the outer edge of the rigid support disc is embedded in the inner wall of the buoy shell, a circular mounting hole is provided in the middle of the rigid support disc, and the dielectric elastomer capacitor is fixed on the circular mounting hole; The dielectric elastomer capacitor comprises a dielectric elastomer film and flexible electrodes arranged on both sides of the surface of the dielectric elastomer film; a mass block is arranged in the middle of the dielectric elastomer capacitor, and the mass block comprises a first mass block and a second mass block, the first mass block is connected to the upper end surface of the dielectric elastomer capacitor and the top of the cavity of the buoy shell through a first spring; the second mass block is connected to the lower end surface of the dielectric elastomer capacitor and a rigid support rod below the dielectric elastomer capacitor through a second spring, and both ends of the rigid support rod are fixed to the inner wall of the cavity of the buoy shell; The electric energy collection circuit is fixed on the rigid support disk and connected to the flexible electrodes arranged on both sides of the surface of the dielectric elastomer film.

2. A wave energy collection device for use in the open sea according to claim 1, characterized in that: The outer shell of the buoy has a flat bottom and a smooth spindle-like structure in the middle and upper parts.

3. A wave energy collection device for use in the open sea according to claim 1, characterized in that: The buoy shell comprises a buoy shell made of plastic material.

4. A wave energy collection device for use in the open sea according to claim 1, characterized in that: The first mass block and the second mass block are cylinders with the same mass and volume, and the centers of the first mass block and the second mass block arranged on the upper and lower sides of the dielectric elastomer capacitor are perpendicular to each other.

5. A wave energy collection device for use in the open sea according to claim 4, characterized in that: The first mass block and the second mass block are both configured as magnetic cylindrical blocks.

6. A wave energy collection device for use in the open sea according to claim 1, characterized in that: The plane where the dielectric elastomer film of the dielectric elastomer capacitor is located is perpendicular to the moving direction of the mass block.

7. A wave energy collection device for use in the open sea according to claim 1, characterized in that: The dielectric elastomer film includes a vhb9469 film.

8. A wave energy collection device for use in the open sea according to claim 1, characterized in that: The electric energy collection circuit includes a charge pump circuit and an electret electrostatic voltage source; The charge pump circuit is connected in parallel with the dielectric elastomer capacitor; The charge pump circuit includes five diodes D1, D2, D3, D4 and D5 connected end to end in sequence, and four capacitors C1, C2, C3 and C4; wherein the cathode of the diode D1 is simultaneously connected to one end of the dielectric elastomer capacitor and the anode of the electret electrostatic voltage source, and the anode of the diode D5 is simultaneously connected to the other end of the dielectric elastomer capacitor and the cathode of the electret electrostatic voltage source; one end of the first capacitor C1 is connected to the anode of the diode D2, and the other end is connected to the anode of the electret electrostatic voltage source; one end of the second capacitor C2 is connected to the cathode of the diode D2, and the other end is connected to the cathode of the electret electrostatic voltage source; one end of the third capacitor C3 is connected to the anode of the diode D4, and the other end is connected to the anode of the electret electrostatic voltage source; one end of the fourth capacitor C4 is connected to the cathode of the diode D4, and the other end is connected to the cathode of the electret electrostatic voltage source.

9. A wave energy collection device for use in the open sea according to claim 8, characterized in that: A fast recovery diode FRD is also connected in parallel between the positive and negative electrodes of the electret electrostatic voltage source, the positive electrode of the fast recovery diode FRD is connected to the negative electrode of the electret electrostatic voltage source, and the negative electrode of the fast recovery diode FRD is connected to the positive electrode of the electret electrostatic voltage source.

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