Float type dielectric elastomer wave energy power generation device

Abstract

The invention belongs to the technical field of renewable energy sources, and relates to a floater type dielectric elastomer wave power generation device which comprises a fixed pile with one fixed end, and an outer shell is arranged at the other end of the fixed pile in a sleeving mode. The floating body is fixedly connected with the outer shell, and the floating body is arranged on the fixed pile in a sleeving manner; the multiple groups of energy conversion devices are uniformly distributed between the end part of the fixed pile and the outer shell, each group of energy conversion device comprises a displacement amplification mechanism and a dielectric elastomer generator, and the displacement amplification mechanism is used for amplifying the heaving displacement of the floating body; and the dielectric elastomer generator is used for converting the mechanical energy output by the displacement amplification mechanism into electric energy. The wave power generator can efficiently convert up-down fluctuating motion of waves into periodic large deformation of the dielectric elastomer power generator body, achieves conversion from mechanical energy to electric energy, is simple and novel in structure, large in power and high in stability, and can achieve efficient and stable conversion of wave energy.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of renewable energy, and particularly relates to a floater type dielectric elastomer wave energy power generation device. BACKGROUND

[0002] Wave energy is a clean marine energy with the characteristics of wide distribution and high energy density, and its development and utilization have attracted widespread attention as a rich renewable energy. At present, in wave energy collection, the electromagnetic generator is mainly used, but for the low-frequency small-size micro wave energy collection device for power supply of the marine sensing node, the mechanism is complex and the output power is low, which is difficult to meet the power supply demand of low-power consumption equipment such as micro sensors, thereby limiting its application.

[0003] As a new flexible power generation technology, the dielectric elastomer generator has the characteristics of large deformation capacity, high energy density and good low-frequency response. The dielectric elastomer wave energy collection devices developed in the prior art mainly include flexible standing wave tube type device, buoy / floating body type device and oscillating water column type, but these devices have poor adaptability to small wave height, and the low output power leads to insufficient energy collection performance, so a wave energy collection device with strong adaptability and high efficiency in low-frequency small-amplitude wave environment is needed. SUMMARY

[0004] Therefore, the present application provides a floater type dielectric elastomer wave energy power generation device to solve the problem of poor adaptability and low energy collection efficiency in low-frequency small-amplitude wave environment in the prior art.

[0005] The technical scheme of the present application is: A floater type dielectric elastomer wave energy power generation device, comprising: a fixed pile, one end of which is fixed; an outer shell, which is sleeved on the other end of the fixed pile; a floating body, which is fixedly connected with the outer shell, and is sleeved on the fixed pile, and under the action of wave energy, the floating body can do up-down reciprocating heaving motion along the fixed pile, and the floating body is used for capturing the energy of waves; Multiple energy conversion devices are evenly distributed between the end of the fixed pile and the outer shell. Each energy conversion device includes a displacement amplification mechanism and a dielectric elastomer generator. The input end of the displacement amplification mechanism is connected to the outer shell, and its output end acts on the dielectric elastomer generator to amplify and output the heave displacement of the floating body. The dielectric elastomer generator is used to convert the mechanical energy output by the displacement amplification mechanism into electrical energy. The displacement amplification mechanism includes a first connecting rod, a second connecting rod, a support rod, and a movable hinge support. One end of the support rod is connected to the fixed pile. The movable hinge support is connected to the outer shell and hinged to one end of the second connecting rod. The other end of the second connecting rod is hinged to one end of the first connecting rod. The other end of the first connecting rod is hinged to the dielectric elastomer generator. The middle part of the first connecting rod is hinged to the end of the support rod.

[0006] Furthermore, the structure of the fixed pile includes a cylinder and a top plate, wherein the cross-section of the top plate is circular and coaxial with the cylinder, and the top plate is fixed to the end of the cylinder and perpendicularly fixed to one end of the support rod.

[0007] Furthermore, the outer shell includes an upper outer shell and a lower outer shell detachably connected to the upper outer shell. The upper outer shell includes a first shell and a support plate. The first shell has a hemispherical or barrel-shaped structure. The periphery of the support plate is fixedly connected to the middle of the first shell, and the support plate is parallel to the end face of the first shell. The lower outer shell includes a second shell and multiple support connecting arms. The second shell and the first shell are assembled to form a sphere or cylinder. A through hole is provided in the middle of the second shell, and a cylinder passes through the through hole. The axis of the through hole is perpendicular to the end face of the second shell. Multiple support connecting arms are evenly distributed around the through hole, and one end of the support connecting arm is fixedly connected to the second shell, and the other end is fixedly connected to the floating body.

[0008] Furthermore, the upper outer shell also includes a plurality of first limiting and fixing lugs for connection, which are evenly distributed on the end face of the first shell, and the connecting surface of the first limiting and fixing lugs is flush with the end face of the first shell. The lower outer shell also includes a plurality of second limiting and fixing lugs for connection, which are positioned one-to-one with the first limiting and fixing lugs, and the connecting surface of the second limiting and fixing lugs is flush with the end face of the second shell. Both the first limiting and fixing lugs and the second limiting and fixing lugs are provided with connecting holes for inserting connectors.

[0009] Furthermore, the dielectric elastomer generator includes a dielectric elastomer generator body and multiple clamping plates fixed at both ends of the dielectric elastomer generator body. The multiple clamping plates are divided into two groups and evenly distributed at both ends of the dielectric elastomer generator body. One group of clamping plates is fixedly connected to a support plate, and the other group of clamping plates is connected to a first connecting rod through a protrusion.

[0010] Furthermore, the cylinder is provided with a first limiter and a second limiter, which are arranged sequentially along the length of the cylinder. The first limiter and the second limiter are used to limit the floating body to its extreme positions.

[0011] Furthermore, a polarization circuit and an energy harvesting circuit are connected in parallel on the two electrodes of the dielectric elastomer generator body. The polarization circuit includes a polarization power supply and a diode D1 connected in series, and the energy harvesting circuit includes a Zener diode D2 and a current-limiting resistor R connected in series.

[0012] Furthermore, the width pre-stretch ratio of the dielectric elastomer generator body is 2-6.

[0013] Furthermore, the width pre-stretch ratio of the dielectric elastomer generator body is 4.

[0014] Compared with existing technologies, the present invention provides a float-type dielectric elastomer wave energy generation device, suitable for scenarios such as marine monitoring, buoy power supply, and small observation equipment. It is the first to propose an integrated structure of "fixed pile + floating body + outer shell + displacement amplification mechanism + dielectric elastomer generator." The displacement amplification mechanism effectively improves the energy utilization rate of small waves, efficiently converting the up-and-down motion of waves into the periodic large deformation of the dielectric elastomer generator body, realizing the conversion of mechanical energy into electrical energy. This is particularly effective for smaller up-and-down motions, and it can output high average power under real ocean wave conditions with low frequency and limited wave height. The structure is simple and novel, with high power and strong stability, achieving efficient and stable conversion of wave energy, and has the following beneficial effects: 1. It has enriched the structural types of micro wave energy harvesting devices; 2. The output power is significantly improved. It adopts a displacement amplification mechanism and multiple sets of dielectric elastomer generators arranged in an array. Under low frequency and low wave height, the average output power can reach the watt level, which far exceeds the existing similar devices. 3. Novel and practical structure: For the first time, a floating body, displacement amplification mechanism and dielectric elastomer generator are combined. The structure is simple and compact, easy to deploy in marine environments, and can directly power low-power multifunctional marine sensors. 4. It has strong adaptability to different operating conditions and can be adapted to different wave heights and frequencies, thus avoiding energy waste. Attached Figure Description

[0015] Figure 1 Front view of the floating dielectric elastomer wave energy generation device of the present invention.

[0016] Figure 2 Right view of the floating dielectric elastomer wave energy generation device of the present invention.

[0017] Figure 3A bottom view of the miniature floating dielectric elastomer wave energy generation device of the present invention.

[0018] Figure 4 A schematic diagram of the dielectric elastomer generator structure of the power generation device of the present invention.

[0019] Figure 5 A schematic diagram of the circuit system of the present invention. Detailed Implementation

[0020] This invention provides a float-type dielectric elastomer wave energy generation device to solve the above-mentioned problems. In order to enable those skilled in the art to better understand the technical solution of this invention and to implement it, the technical solution of this invention will be clearly and thoroughly described below with reference to the accompanying drawings.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, it should be further explained that in the description of the embodiments of the present invention, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present invention, "multiple" means two or more.

[0023] The terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0027] Example 1 A float-type dielectric elastomer wave energy generation device is suitable for scenarios with smaller wave heights and near-real ocean wave frequencies, and has the optimal output power.

[0028] This invention provides a float-type dielectric elastomer wave energy generation device, the structure of which is as follows: Figure 1 As shown, the lower end of the cylinder 10 is connected to the seabed, and its structure includes a fixed pile, a floating body 20, an outer shell, and multiple energy conversion devices.

[0029] Specifically, the structure of the fixed pile includes a cylinder 10 and a top plate 15. The top plate 15 has a circular cross-section and is coaxially arranged with the cylinder 10. The top plate 15 is fixed to one end of the cylinder 10, and the other end of the cylinder 10 is used to fix it to the seabed.

[0030] The floating body 20 is used to capture the energy of the waves. The floating body 20 is circular and is fitted onto the cylinder 10. Under the action of the wave energy, the floating body 20 can swing up and down along the cylinder 10.

[0031] The outer shell is fixedly connected to the floating body 20, and the outer shell is fitted onto the end of the fixed pile. The outer shell includes an upper outer shell 30 and a lower outer shell 31 that is detachably connected to the upper outer shell 30.

[0032] The upper outer shell 30 includes a first shell, a support plate 302, and a plurality of first limiting and fixing lugs 301 for connection. The first shell has a hemispherical or cylindrical structure. The plurality of first limiting and fixing lugs 301 for connection are evenly distributed on the end face of the first shell, and the connecting surface of the first limiting and fixing lugs 301 is flush with the end face of the first shell. The periphery of the support plate 302 is fixedly connected to the middle of the first shell, and the support plate 302 is parallel to the end face of the first shell.

[0033] The lower outer shell 31 includes a second shell, multiple supporting connecting arms 311, and multiple connecting second limiting and fixing lugs 312. The second shell has a hemispherical or cylindrical structure and is consistent with the structure of the first shell. The two can be assembled to form a sphere or cylinder. A through hole is provided in the middle of the second shell. The axis of the through hole is perpendicular to the end face of the second shell. The size of the through hole matches that of the cylinder 10 for passing through the cylinder 10. The multiple connecting second limiting and fixing lugs 312 are evenly distributed on the end face of the second shell, and the connecting surface of the second limiting and fixing lugs 312 is flush with the end face of the second shell. Both the first limiting and fixing lugs 301 and the second limiting and fixing lugs 312 have connecting holes for passing through the connecting holes to facilitate the detachable connection between the upper outer shell 30 and the lower outer shell 31. The multiple supporting connecting arms 311 are evenly distributed around the through holes, and one end of the supporting connecting arm 311 is fixedly connected to the second shell, and the other end is fixedly connected to the floating body 20 by bolts.

[0034] Specifically, in this embodiment, there are four first limiting fixing ear pieces 301, two limiting fixing ear pieces 312, and four supporting connecting arms 311. The positions of the first limiting fixing ear pieces 301 and the second limiting fixing ear pieces 312 are applied one-to-one to the connecting member. The connecting member can be a bolt. The first limiting fixing ear pieces 301 and the second limiting fixing ear pieces 312 are connected by bolts.

[0035] like Figure 3 As shown, multiple energy conversion devices are installed between the end of the fixed pile and the outer shell to convert the up-and-down swaying motion of the floating body along the fixed pile into electrical energy.

[0036] Specifically, this embodiment includes four sets of energy conversion devices, which are evenly distributed between the top plate 15 and the support plate 302. Each set of energy conversion devices includes a displacement amplification mechanism and a dielectric elastomer generator 50, which can be abbreviated as DEG.

[0037] Specifically, such as Figure 4 As shown, the dielectric elastomer generator 50 includes a dielectric elastomer generator body 501 and four clamping plates 502 fixed at both ends of the dielectric elastomer generator body 501. The four clamping plates 502 are divided into two groups and evenly distributed at both ends of the dielectric elastomer generator body 501. One group of clamping plates 502 is fixedly connected to the support plate 302, and the other group of clamping plates 502 is fixedly connected to the protrusion 304.

[0038] Specifically, the displacement amplification mechanism includes a first connecting rod 40, a second connecting rod 41, a support rod 13, and a movable hinge support 303. One end of the support rod 13 is vertically and fixedly connected to the top plate 15. The movable hinge support 303 is fixedly connected to the support plate 302 and is hinged to one end of the second connecting rod 41. The other end of the second connecting rod 41 is hinged to one end of the first connecting rod 40. The other end of the first connecting rod 40 is hinged to the protrusion 304. The first connecting rod 40 is hinged at the middle fulcrum position at the end of the support rod 13.

[0039] As further explained, the aforementioned tab 304 has a first connecting part and a second connecting part. The first connecting part is fixedly connected to a set of clamping plates 502 by screws, and the second connecting part is provided with a hinge hole for realizing a hinge connection with the first connecting rod 40.

[0040] like Figure 2 As shown, if the floating body 20 moves upward under the influence of wave energy, the outer shell moves upward synchronously along the length of the cylinder 10. One end of the second connecting rod 41 is pushed upward, thereby pulling the first connecting rod 40 downward at one end of the dielectric elastomer generator 50. During this process, the dielectric elastomer generator body 501 is stretched. If the floating body 20 moves downward under the influence of wave energy, the outer shell moves downward synchronously along the length of the cylinder 10. One end of the second connecting rod 41 is pulled downward, thereby pulling the first connecting rod 40 upward at one end of the dielectric elastomer generator 50. During this process, the dielectric elastomer generator body 501 is relaxed. Under the influence of wave energy, the floating body 20 performs a reciprocating swaying motion, and the dielectric elastomer generator body 501 is repeatedly stretched and relaxed, thereby converting wave energy into electrical energy.

[0041] As a further improvement to this embodiment, for safety reasons, the vertical swinging motion is limited.

[0042] Specifically, a first limiter 11 and a second limiter 12 are provided on the cylinder 10. The first limiter 11 and the second limiter 12 are arranged sequentially along the length direction of the cylinder 10. The first limiter 11 and the second limiter 12 are used to limit the floating body 20 to the extreme.

[0043] Specifically, the first limiter 11 and the second limiter 12 can preferably be implemented as a limit ring, which is fitted and fixed to the cylinder 10 to form a mechanical hard limit.

[0044] In actual use, the floating body 20, under the action of wave energy, performs a reciprocating up-and-down swaying motion along the cylinder 10 between the first limiter 11 and the second limiter 12. In the specific design, in order to prevent the floating body 20 from being damaged by the collision between the floating body 20 and the limiter ring, the limiter ring can be made of rubber or the outer surface of the limiter ring can be wrapped with rubber to provide shock absorption and cushioning.

[0045] In practical applications, as one preferred embodiment, the preferred solution of the above structure is as follows: Fixed piles: stainless steel piles with a diameter of 0.1m and a length of 3m. The bottom of the fixed piles is fixed to the seabed, and the top of the fixed piles extends 0.5m above the static water level.

[0046] Floating body 20: made of ABS material, cylindrical in shape, with a diameter of 1.6m and a height of 0.6m, fixed to the outer shell by bolts, and slidingly fitted along the fixed pile.

[0047] Outer shell: cylindrical, made of ABS material, with an inner diameter of 1.6m and a height of 1.3m. Four sets of fiber-constrained dielectric elastomer generators 50 are evenly arranged circumferentially inside.

[0048] Displacement amplification mechanism: It consists of aluminum alloy rod assemblies. The length of the first connecting rod 40 is 0.8m, the length of the second connecting rod 41 is 0.49m, the length of the support rod 13 is 0.2m, and the hinge point is connected by stainless steel bearings.

[0049] Dielectric elastomer generator 50: The core layer uses VHB elastomer with a thickness of 0.5mm. The electrodes are flexible electrodes made of conductive carbon paste or graphene. The deformation method is fiber-constrained shearing (the fibers are constrained along the width direction, so that the dielectric elastomer generator 50 deforms only along the length direction). It is a single layer with a total of 4 groups. The initial dimensions of each group of dielectric elastomer generators 50 are 0.16m in length, 0.16m in width, and 0.5mm in thickness. The fibers are constrained along the length direction, and the pre-stretch ratio is 4. The maximum stretch ratio in the length direction is preset to 6.5.

[0050] like Figure 5 As shown, the circuit system includes a polarization circuit and an energy harvesting circuit connected in parallel on the two electrodes of the dielectric elastomer generator body 501. Specifically, the polarization circuit includes a polarization power supply and a diode D1 connected in series, and the energy harvesting circuit includes a Zener diode D2 and a current-limiting resistor R connected in series. The polarization power supply has an input voltage of 2kV, the reverse breakdown voltage of the Zener diode D2 is 3.2kV, and the current-limiting resistor R is 100kΩ.

[0051] Assembly steps: Preparation of fiber-constrained dielectric elastomer generator body 501: Conductive carbon paste is applied to both sides of VHB elastomer film to form dielectric elastomer generator body 501. The dielectric elastomer generator body 501 is pre-stretched using a clamp with a ratio of 4. Polyester fibers are then adhered along the width direction to restrict deformation in the width direction.

[0052] Displacement amplification mechanism assembly: Connect the first link 40, the second link 41, the support rod 13 and the movable hinge support 303 to ensure smooth and unobstructed movement of the links.

[0053] Device assembly: Fix the four DEG sets to the inner wall of the outer shell and the output end of the displacement amplification mechanism respectively. Fix the outer shell to the floating body 20 with bolts. Fit the floating body 20 into the fixed pile and install the sealing element to achieve waterproofing.

[0054] Circuit connection: The polarization power supply is connected in series with diode D1, and the Zener diode D2 is connected in series with current limiting resistor R. They are then connected in parallel with the two electrodes of the dielectric elastomer generator body 501 to ensure good circuit contact and waterproof sealing of the joints.

[0055] Specifically, the joint between the upper outer shell 30 and the lower outer shell 31, the through hole in the middle of the second shell, and the electrical interface can all be sealed with O-rings, gaskets, or potting compound to prevent rapid equipment failure.

[0056] Implementation process: After the device is assembled, the anchor piles are secured to the seabed. When waves act on the floating body 20, the floating body 20 causes the outer shell to sway. This swaying motion is amplified by the displacement amplification mechanism and drives the DEG to synchronously perform periodic stretching and relaxation (width pre-stretch ratio approximately 2-6). The DEG, through... Figure 5 The energy harvesting circuit shown outputs electrical energy.

[0057] Effects: Under the same wave conditions of 8cm wave height and 0.5Hz frequency, the device of this invention outputs 1.7W, while the traditional DEG device without amplification mechanism outputs only 0.3W, representing an increase of approximately 5.7 times. This power level is sufficient to continuously power low-power marine environmental monitoring sensors, demonstrating the practical value and significant advantages of this invention in the field of micro-energy harvesting.

[0058] In actual operation, the length of the rods in the displacement amplification mechanism can be adjusted to further adapt to different wave conditions and optimize the output power, verifying the feasibility and stability of the device. The parameters can also be adjusted according to the actual sea conditions to achieve the best effect.

[0059] Example 2 As a further optimization based on the technology of Embodiment 1, with other structures remaining unchanged, the movable hinge support 303 of the displacement amplification mechanism can be designed in a more compact manner, so that four sets of displacement amplification mechanisms can share one movable hinge support 303. In order to adapt to this design, the structure of the movable hinge support 303 has been adapted.

[0060] Specifically, the movable hinge support 303 includes a quadrangular prism, one end of which is vertically fixed to the support plate 302, and each side of the quadrangular prism is hinged to a second link 41.

[0061] With this structure, the original function can be achieved by simply setting up a movable hinge support 303, which saves costs and improves economic efficiency.

[0062] Compared with existing technologies, the present invention provides a float-type dielectric elastomer wave energy generation device. Its energy conversion path is: wave → floating body swaying → outer shell movement → amplified movement of the first / second link → stretching of the dielectric elastomer generator body for power generation. The entire scheme efficiently converts the up-and-down undulating motion of the wave into the periodic large deformation of the dielectric elastomer generator based on the specific geometric configuration of the displacement amplification mechanism, realizing the conversion of mechanical energy into electrical energy. The core lies in the efficient collection of wave energy through the synergy of the dielectric elastomer generator array and the displacement amplification mechanism. It uses a specific, first-proposed combined structure of "fixed pile + floating body + outer shell + displacement amplification mechanism + dielectric elastomer generator array" as its main structure. This structure is particularly effective for smaller up-and-down undulating motions, and can output high average power under real ocean wave conditions with low frequency and limited wave height. The structure is simple and novel, with high power and strong stability, achieving efficient and stable conversion of wave energy. It is highly practical and worthy of promotion.

[0063] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A float-type dielectric elastomer wave energy generator, characterized by, The utility model relates to a wave energy conversion device, comprising: a fixed pile, one end of which is fixed; an outer shell, which is sleeved on the other end of the fixed pile; a floating body, which is fixedly connected with the outer shell, is sleeved on the fixed pile and can make heave motion along the fixed pile under the action of wave energy, and is used for capturing the energy of waves; a plurality of energy conversion devices, which are evenly arranged between the end of the fixed pile and the outer shell, each energy conversion device comprising a displacement amplification mechanism and a dielectric elastomer generator, the input end of the displacement amplification mechanism being connected with the outer shell, the output end of the displacement amplification mechanism acting on the dielectric elastomer generator, the displacement amplification mechanism being used for amplifying and outputting the heave displacement of the floating body, and the dielectric elastomer generator being used for converting the mechanical energy output by the displacement amplification mechanism into electrical energy, wherein the displacement amplification mechanism comprises a first connecting rod, a second connecting rod, a support rod and a movable hinged support, one end of the support rod is connected with the fixed pile, the movable hinged support is connected with the outer shell and is hingedly connected with one end of the second connecting rod, the other end of the second connecting rod is hingedly connected with one end of the first connecting rod, the other end of the first connecting rod is hingedly connected with the dielectric elastomer generator, and the middle part of the first connecting rod is hingedly installed on the end of the support rod.

2. The float-type dielectric elastomer wave energy harvester of claim 1, wherein, The structure of the fixed pile comprises a cylinder and a top plate, wherein the cross section of the top plate is circular and coaxially arranged with the cylinder, the top plate is fixed on the end of the cylinder and is fixedly connected with one end of the support rod perpendicularly.

3. The float-type dielectric elastomer wave energy harvester of claim 1, wherein, The outer shell comprises an upper shell and a lower shell which is detachably connected with the upper shell, wherein the upper shell comprises a first shell and a support plate, the first shell is in the structure of a hemisphere or a barrel, the periphery of the support plate is fixedly connected with the middle part of the first shell, and the support plate is parallel to the end surface of the first shell; the lower shell comprises a second shell and a plurality of support connecting arms, the second shell and the first shell form a sphere or a cylinder after being spliced, a through hole is formed in the middle part of the second shell, a cylinder is arranged in the through hole, the axis of the through hole is perpendicular to the end surface of the second shell, and the plurality of support connecting arms are evenly arranged on the periphery of the through hole, one end of each support connecting arm is fixedly connected with the second shell, and the other end is fixedly connected with the floating body.

4. The float-type dielectric elastomer wave energy harvester of claim 3, wherein, The upper shell further comprises a plurality of first limiting fixing lugs for connection, the plurality of first limiting fixing lugs for connection are evenly arranged on the end surface of the first shell, the connecting surface of each first limiting fixing lug is flush with the end surface of the first shell, the lower shell further comprises a plurality of second limiting fixing lugs for connection, the plurality of second limiting fixing lugs for connection correspond to the plurality of first limiting fixing lugs for connection one by one, and the connecting surface of each second limiting fixing lug is flush with the end surface of the second shell, and a connecting hole for arranging a connecting piece is formed in each of the first limiting fixing lugs and the second limiting fixing lugs.

5. The float-type dielectric elastomer wave energy harvester of claim 4, wherein, The dielectric elastomer generator comprises a dielectric elastomer generator body and a plurality of clamping plates which are fixed on both ends of the dielectric elastomer generator body, the plurality of clamping plates are evenly arranged in two groups on both ends of the dielectric elastomer generator body, one group of clamping plates is fixedly connected with the support plate, and the other group of clamping plates is connected with the first connecting rod through tabs.

6. The float-type dielectric elastomer wave energy harvester of claim 2, wherein, The first and second limiters are arranged along the length direction of the cylinder body in sequence, and are used for limiting the floating body.

7. The float-type dielectric elastomer wave energy harvester of claim 5, wherein, The two electrodes of the dielectric elastomer generator body are connected in parallel with a polarization circuit and an energy collection circuit, the polarization circuit comprises a polarization power supply and a diode D1 connected in sequence, and the energy collection circuit comprises a voltage stabilizing diode D2 and a current limiting resistor R connected in sequence.

8. The float-type dielectric elastomer wave energy harvester of claim 5, wherein, The width pre-stretching ratio of the dielectric elastomer generator body is 2-6.

9. A float-type dielectric elastomer wave energy power plant according to claim 8, characterized in that The width pre-stretching ratio of the dielectric elastomer generator body is 4.

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