Totally-closed double-floating-body wave power generation device

Abstract

The invention discloses a totally-closed double-floating-body wave power generation device which comprises an outer floating body, an inner floating body, a buffer device, a rope winding device and a nonlinear bistable device. The buffer device is connected with a hydraulic device and a hydraulic power generation device; a wave-shaped groove is formed in the side surface of the inner floating body; the outer floating body comprises a buoy, a partition plate arranged in the buoy and an energy capturing floating body arranged on the buoy in a sleeving mode. The rope winding device is located on the partition plate. A hole is formed in the partition plate, and a guide wheel with a rotating shaft is arranged in the hole; the nonlinear bistable device comprises a pressing rod, a spring and a sleeve fixed to the inner side of the buoy. The cable winding device comprises a cable winding rope, a cable winding power generation device, a transmission shaft, a spring piece support and a spring piece. The non-linear bistable state device is used for providing non-linear restoring force, so that two stable balance positions appear when the outer floating body and the inner floating body generate relative heaving motion, a bistable state system is formed, the motion amplitude of the floating bodies is increased under wave excitation, the capture frequency band width is enlarged, and the wave energy capture efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wave power generation, and in particular to a fully enclosed double-floating body wave energy power generation device. Background Art

[0002] With the rapid development of economy, the demand for energy is increasing day by day, which also causes energy shortage and environmental pollution. The development of renewable energy is urgent. As an important marine renewable energy, wave energy can generate 8000-80000TW·h of electricity per year, which has great development prospects. Wave energy power generation technology is to capture wave energy and convert it into usable electrical energy through energy output system, and the system that captures wave energy is called wave energy conversion system or wave energy power generation system. Wave energy devices have various structural forms. According to their principles, wave energy devices can be divided into oscillating water column type, overpass type and oscillating float type. Among them, the oscillating float type double-floating body wave energy device has attracted widespread attention due to its simple structure and high stability.

[0003] Although the oscillating float type double floating body wave energy converter has good application potential in wave energy capture, most of these wave energy converters are linear wave energy converters, which face two major problems in their development process, namely low capture efficiency and narrow frequency band. In fact, the conversion efficiency of the wave energy converter is related to many factors, including the frequency of the incident wave, the shape of the wave energy converter, the draft, the center of gravity, and the parameters of the energy conversion system. As we all know, in order to achieve better wave energy capture efficiency, the linear wave energy converter usually sets a specific frequency for resonance. However, since the dominant frequency of the waves may change over time, it deviates from the design frequency of the system, which may lead to poor efficiency of the linear wave energy converter. In addition, the real waves are irregular waves with spectral characteristics. Since the narrow wave energy capture frequency band of the linear wave energy converter cannot capture the energy of each frequency distribution in the irregular wave well, it affects the overall capture efficiency.

[0004] In addition, many components of the traditional oscillating float double-floating body wave energy power generation device are exposed to seawater. The harsh working environment (high salt, strong winds, huge waves) will greatly reduce the working reliability of many components and affect the stability of the wave energy conversion device. Summary of the invention

[0005] Purpose of the invention: In view of the deficiencies in the above-mentioned prior art, the present invention proposes a fully enclosed double-floating wave energy power generation device. By placing the inner buoy and other devices inside the outer buoy, a fully enclosed double-floating wave energy power generation device is constructed to avoid contact between the devices and seawater; at the same time, a nonlinear bistable device is introduced to make the wave energy power generation device have relatively high adaptability to sea areas, and at the same time provide a nonlinear restoring force so that two stable equilibrium positions appear when relative heaving motion occurs between the outer buoy and the inner buoy, forming a bistable system. Under wave excitation, the inter-well jumping mechanism of the bistable system is used to amplify the motion amplitude of the float and expand the capture bandwidth, thereby effectively improving the wave energy capture efficiency.

[0006] Technical solution: The fully enclosed double-floating body wave energy power generation device of the present invention comprises an outer floating body, an inner floating body, a buffer device, a cable winding device and a nonlinear bistable device; the buffer device is connected to a hydraulic device and a hydraulic power generation device; a wave-shaped groove is provided on the side of the inner floating body; the bottom of the inner floating body is connected to the bottom of the outer floating body through the buffer device;

[0007] The outer floating body includes a buoy, a partition disposed inside the buoy, and an energy-capturing buoy sleeved on the buoy; the cable reel is located on the partition; an opening is provided on the partition, and a guide wheel with a rotating shaft is provided in the opening;

[0008] The nonlinear bistable device comprises a pressure rod, a spring, and a sleeve fixed on the inner side of the buoy; one end of the pressure rod is connected to a roller; the other end of the pressure rod passes through the sleeve and is connected to the sleeve through the spring; the roller is embedded in the wave-shaped groove;

[0009] The cable winding device includes a cable winding rope, a cable winding power generation device, a transmission shaft, a spring leaf bracket and a spring leaf; the cable winding power generation device and the spring leaf bracket are arranged at both ends of the transmission shaft, and the spring leaf is arranged in the spring leaf bracket and connected to the transmission shaft; one end of the cable winding rope is connected to the top of the inner floating body through a guide wheel, and the other end of the cable winding rope is wound around the transmission shaft.

[0010] The buffer device comprises a spring buffer, a buffer plate, and cross-connected hinged telescopic rods; one end of the cross-connected hinged telescopic rod is connected to the bottom of the buffer plate through the spring buffer, and the other end is connected to the hydraulic device.

[0011] The hydraulic device is located at the bottom of the buoy and is connected to the buffer device to convert the mechanical energy of the waves into hydraulic energy.

[0012] The spring buffer comprises a buffer spring, a buffer rod and a buffer cylinder; the buffer rod passes through the top of the buffer cylinder, and the buffer spring is located between the buffer rod and the buffer cylinder.

[0013] One end of the pressure rod is provided with a hinged fastener, and the pressure rod is connected with the roller through the hinged fastener.

[0014] A hinged fastener is arranged on the top of the inner floating body, and one end of the cable winding rope is connected with the hinged fastener on the top of the inner floating body through a guide wheel in an opening of the partition plate.

[0015] The nonlinear bistable devices are distributed in multiple layers inside the buoy.

[0016] A plurality of hinged fasteners are arranged at the bottom of the buoy, and the hinged fasteners are connected to the buffer plate through cross-connected hinged telescopic rods.

[0017] The inner float is located on the buffer plate of the buffer device, and the buffer device buffers the movement of the inner float to avoid collision between the inner float and the outer float, thereby preventing damage.

[0018] The energy-capturing float is an annular hollow float, which provides buoyancy and anti-capsulation capability.

[0019] Working principle: The present invention constructs a fully enclosed double-floating wave energy device by placing the inner buoy and other devices inside the outer buoy, thereby preventing the devices from contacting the seawater and improving the reliability of the long-term operation of the device. In addition, a nonlinear bistable device is introduced, and the nonlinear characteristics of the nonlinear bistable device are used to provide a nonlinear restoring force so that two stable equilibrium positions appear when relative heaving motion occurs between the outer buoy and the inner buoy, forming a bistable system. Under wave excitation, the inter-well jumping mechanism of the bistable system is used to amplify the motion amplitude of the float and expand the capture bandwidth, thereby effectively improving the wave energy capture efficiency.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0021] (1) The fully enclosed double-floating wave energy power generation device of the present invention, on the one hand, improves the working reliability of the wave energy power generation device by placing the inner floating body and other devices inside the outer floating body, thereby making it more adaptable to sea areas.

[0022] (2) On the other hand, the present invention introduces a nonlinear bistable device between the outer buoy and the inner buoy. Based on the mutual cooperation of multiple functional components, a nonlinear restoring force is generated through the relative heaving motion between the outer buoy and the inner buoy. As a result, two stable equilibrium positions appear when relative heaving motion occurs between the outer buoy and the inner buoy, which is beneficial for the outer buoy and the inner buoy to generate large-amplitude inter-well oscillations between different stable equilibrium positions, so as to expand the frequency bandwidth of the wave energy power generation device, improve the wave energy capture efficiency, and ensure stable and reliable energy output.

[0023] (3) The fully enclosed double-floating wave energy power generation device of the present invention is anchored to the seabed through an external anchor chain, thereby achieving the collection and power generation of wave energy while ensuring a certain degree of marine survivability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the fully enclosed double-floating body wave energy power generation device of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the fully enclosed double-floating body wave energy power generation device of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the outer floating body of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the inner floating body of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the hydraulic device of the present invention;

[0029] Figure 6 It is a schematic structural diagram of the buffer device of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the spring buffer of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the cable winding device of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the nonlinear bistable device of the present invention;

[0033] Fig.10 It is a schematic diagram of the cooperation between the inner floating body and the nonlinear bistable device of the present invention;

[0034] Fig.11 It is a schematic diagram of a potential energy function curve of a nonlinear bistable device of the present invention;

[0035] Fig.12 It is a comparison diagram of the wave energy capture width of the nonlinear bistable device of the present invention and the traditional linear device;

[0036] Fig.13 It is a schematic diagram of the structure of the energy-capturing float of the present invention;

[0037] Fig.14 It is a schematic diagram of the partition and guide wheel of the present invention. DETAILED DESCRIPTION

[0038] like Figures 1 to 14 As shown, the fully enclosed double-floating body wave energy power generation device of the present invention comprises an outer floating body 1, an inner floating body 2, a hydraulic device 3, a hydraulic power generation device 7, a buffer device 4, a cable winding device 5 and a nonlinear bistable device 6. The inner floating body 2, the hydraulic device 3, the hydraulic power generation device 7, the buffer device 4, the cable winding device 5 and the nonlinear bistable device 6 are all arranged inside the outer floating body 1.

[0039] The outer buoy 1 includes a float 1-2, a top cover 1-1 installed on the top of the float 1-2, a partition 1-3 arranged inside the float 1-2 and above the inner float, and an energy-capturing float 1-4 sleeved on the outside of the float 1-2.

[0040] The inner floating body 2 is located on the buffer plate of the buffer device 4, the cable winding device 5 is placed on the partition 1-3, the inner floating body 2 is connected to the cable winding device 5 through the top hinged fastener, and the nonlinear bistable device 6 is arranged on the inner side of the buoy.

[0041] like Fig.13 As shown, the energy-capturing float 1-4 is an annular hollow float. In this embodiment, the energy-capturing float 1-4 is welded to the outer wall of the buoy 1-2 to provide buoyancy and anti-overturning capability. The inner bottom of the buoy 1-2 is provided with a plurality of hinged fasteners 8 for connecting the hinged telescopic rod 4-1.

[0042] like Fig.14 As shown, in this embodiment, three holes are opened on the partition 1-3, and a rotating shaft and a guide wheel 1-5 are arranged in the opening. The rotating shaft passes through the central hole of the guide wheel 1-5, and the guide wheel 1-5 rotates freely around the rotating shaft. The guide wheel 1-5 is used to guide the winding rope 5-1.

[0043] The hydraulic device 3 includes a hydraulic rod 3-1, a hydraulic cylinder 3-2 and an articulated telescopic rod 4-1. The hydraulic device 3 and the buffer device 4 are arranged at the bottom of the buoy 1-2. A hydraulic power generation device 7 is arranged at the center of the bottom of the buoy 1-2. The inner floating body 2 is placed above the buffer device 4. The cable winding device 5 is placed on the partition 1-3. The inner floating body 2 is connected to the cable winding device 5 through a hinged fastener 8 at the top. The nonlinear bistable device 6 is arranged on the inner side wall of the buoy 1-2. The roller 6-4 of the nonlinear bistable device 6 is embedded in the wave-shaped groove 2-1 on the side of the inner floating body 2.

[0044] like Figure 5-6 As shown, three groups of articulated fasteners 8 and three groups of hydraulic devices 3 are provided at the inner bottom of the pontoon 1-2, and each group of articulated fasteners 8 and hydraulic devices 3 are respectively connected to an articulated telescopic rod 4-1, and the two articulated telescopic rods 4-1 are cross-interconnected, and the two articulated telescopic rods 4-1 are respectively connected to an articulated telescopic rod 4-1, and the added articulated telescopic rods 4-1 are still cross-interconnected, and one of the added articulated telescopic rods 4-1 is articulated to the articulated fastener 8 at the bottom of the buffer plate 4-3, and the other is connected to the spring buffer 4-2, and the spring buffer 4-2 is then articulated to the articulated fastener 8 at the bottom of the buffer plate 4-3.

[0045] The buffer device 4 includes a hinged telescopic rod 4-1, a spring buffer 4-2 and a buffer plate 4-3. Figure 7As shown, the spring buffer 4-2 is composed of a buffer spring 4-2-1, a buffer rod 4-2-2, a buffer cylinder 4-2-3 and hinged fasteners 8 at both ends. The buffer rod 4-2-2 passes through the top of the buffer cylinder 4-2-3 and is coaxial, and the buffer spring 4-2-1 is located between the buffer rod 4-2-2 and the buffer cylinder 4-2-3. When the inner floating body 2 generates a heaving motion in the outer floating body 1, the buffer device 4 buffers the movement of the inner floating body 2, avoiding the collision between the inner floating body 2 and the outer floating body 1 to cause damage, thereby affecting the stability of the wave energy conversion device. Secondly, the buffer spring device 4-2 in the buffer device 4 also plays a role in storing energy while the inner floating body 2 compresses the buffer device 4, providing auxiliary power to the inner floating body 2, which is conducive to generating a larger motion amplitude when the inner floating body 2 and the outer floating body 1 move relative to each other. In addition, the hydraulic power generation device 7 arranged at the central position at the bottom of the buoy 1-2 is connected to the hydraulic device 3 through a pipeline. The hydraulic device 3 is used to convert the mechanical energy of the waves into hydraulic energy; the hydraulic power generation device 7 is used to convert the hydraulic energy into electrical energy.

[0046] like Figure 4 As shown, the inner floating body 2 is placed on the buffer plate 4-3 of the buffer device, the top of the inner floating body 2 is provided with a hinged fastener 8 for connecting the cable winding device 5, and the side of the inner floating body 2 is provided with three wave-shaped grooves 2-1.

[0047] like Figure 9-10 As shown, the nonlinear bistable device 6 includes a pressure rod 6-1, a spring 6-2 and a sleeve 6-3, one end of the pressure rod 6-1 is provided with a hinged fastener 8 and connected to a roller 6-4, and the roller 6-4 can rotate freely. The pressure rod 6-1 passes through the top of the sleeve 6-3 and is coaxial, and the spring 6-2 is arranged between the bottom surface of the pressure rod 6-1 and the bottom surface of the sleeve 6-3.

[0048] The nonlinear bistable device 6 is provided with two layers, and each layer is arranged with three equidistant arrays around the buoy 1-2. The bottom of the sleeve 6-3 of each nonlinear bistable device 6 is welded to the inner wall of the buoy 1-2, and the roller 6-4 is embedded in the wave-shaped groove 2-1 on the side of the inner buoy 2 and abuts against the inner buoy 2. When the inner buoy 2 moves to the point where the roller 6-4 of the nonlinear bistable device 6 abuts against the vertex of the wave-shaped groove 2-1, as shown in FIG. Fig.10 As shown, the spring 6-2 in the nonlinear bistable device 6 is in the maximum compression state, and the system potential energy is large (the calculation formula of the system potential energy here is E=k*x 2 , where k is the spring stiffness of spring 6-2, and x is the spring elongation), the system is in an unstable state. At this time, no matter whether the inner floating body 2 has an upward or downward movement trend, the nonlinear bistable device 6 will provide a corresponding upward or downward thrust, so that the inner floating body 2 produces a larger heaving motion amplitude, such as Fig.11As shown, at this time, a potential barrier will appear in the system potential energy function of the wave energy power generation device, that is, the expansion and contraction amount x of the spring 6-2 reaches the maximum value, so that the potential energy function E reaches the maximum value; when the inner floating body 2 moves upward or downward to the lowest point where the roller 6-4 of the nonlinear bistable device 6 abuts against the wave-shaped groove 2-1, as shown in FIG. Fig.10 As shown, the system is in a stable state. Two potential wells will appear in the system potential energy function of the wave energy power generation device. At this time, the expansion and contraction amount x of the spring 6-2 reaches the minimum. According to the calculation formula of the potential energy function E = k*x 2 , at this time, the potential energy also reaches the minimum value, that is, two potential wells appear. When the system moves from an unstable state to a stable state, the expansion and contraction amount x of spring 6-2 becomes smaller, and spring 6-2 releases energy. At this time, spring 6-2 applies a thrust in the same direction as the movement direction of inner float 2 to inner float 2 through the roller, that is, nonlinear restoring force, which is conducive to generating a larger motion amplitude when inner float 2 moves relative to outer float 1, such as Fig.12 As shown, due to the addition of nonlinear devices, the energy capture width is widened to the low-frequency region, and its peak value is much higher than that of traditional linear devices, which plays a role in expanding the capture bandwidth and improving the wave energy capture efficiency.

[0049] like Figure 8 As shown, the cable winding device 5 is arranged on the partition 1-3, and is composed of a cable winding rope 5-1, a cable winding power generation device 5-2, a transmission shaft 5-3, a spring plate bracket 5-4 and a spring plate 5-5. The cable winding power generation device 5-2 and the spring plate bracket 5-4 are arranged at both ends of the transmission shaft 5-3, and the spring plate 5-5 is arranged in the spring plate bracket 5-4 and is fixedly connected to the transmission shaft 5-3. The cable winding rope 5-1 passes through the hole on the partition 1-3, one end of which is connected to the hinged fastener 8 at the top of the inner floating body 2 through the cable node 5-1-1, and the other end is fixed and wound on the transmission shaft 5-3. When the cable winding rope 5-1 is pulled, the transmission shaft 5-3 rotates along with the cable winding rope 5-1. When the inner buoy 2 moves downward relative to the outer buoy 1, the cable 5-1 is pulled, driving the transmission shaft 5-3 to rotate, and the spring sheet 5-5 is tightened to store energy. When the inner buoy 2 moves downward to the maximum distance relative to the outer buoy 1, that is, the inner buoy 2 maintains its static state under the action of inertia and the outer buoy 1 moves upward under the action of waves, the inner buoy 2 compresses the buffer device 4 and pulls the cable 5-1 until the inner buoy 2 no longer maintains its static state, but moves upward with the outer buoy 1. The spring sheet 5-5 begins to release energy and drives the transmission shaft 5-3 to rotate in the opposite direction to recover the cable 5-1. During the rotation process, the transmission shaft 5-3 drives the cable generator 5-2 to convert mechanical energy into electrical energy.

[0050] The working method of the fully enclosed double-floating body wave energy power generation device of the present invention is as follows:

[0051] (1) The outer buoy 1 is anchored to the seabed through the anchor chain 9, and the energy-capturing buoy 1-4 floats on the water surface. Under the action of waves, the energy-capturing buoy 1-4 absorbs wave energy and drives the buoy 1-2 to produce a heaving motion. The buffer device 4 and the cable reel device 5 transfer the wave energy captured by the energy-capturing buoy 1-4 and the buoy 1-2 to the inner buoy 2. Specifically, when the outer buoy 1 moves upward relative to the inner buoy 2, the buffer device 4 is compressed, generating an upward thrust on the inner buoy 2, and the cable reel 5-1 in the cable reel device 5 is pulled, generating an upward pulling force on the inner buoy 2, thereby The wave energy is transmitted to the inner buoy 2; the inner buoy 2 also swings under the thrust of the buffer device 4 and the tension of the cable winding device 5; and when the outer buoy 1 just starts to move, the inner buoy 2 remains in its original stationary state due to inertia, and only swings under the action of the buffer device 4 and the cable winding device 5. At the same time, due to the different overall structures and mass parameters of the outer buoy 1 and the inner buoy 2, the two have different resonant frequencies, and thus produce relative displacement, thereby driving the hydraulic device 3 to produce hydraulic movement and the transmission shaft 5-3 of the cable winding device 5 to produce rotational movement.

[0052] (2) Under the action of the inner buoy 2, part of the captured energy is converted into hydraulic energy through the hydraulic device 3, and further drives the engine in the hydraulic power generation device 7 to generate electricity through the pipeline; the other part is converted into elastic potential energy through the cable winding device 5, and further drives the generator in the cable winding power generation device 5-2 through the transmission shaft 5-3 to convert the wave energy into electrical energy.

[0053] (3) During the movement of the outer buoy 1 and the inner buoy 2, the nonlinear bistable device 6 provides a nonlinear restoring force, so that the outer buoy 1 and the inner buoy 2 produce a larger motion amplitude when they move relative to each other, thereby expanding the captured frequency bandwidth and improving the capture efficiency of wave energy.

Claims

1. A fully enclosed double-floating wave energy power generation device, characterized in that: The invention comprises an outer floating body (1), an inner floating body (2), a buffer device (4), a cable winding device (5) and a nonlinear bistable device (6); the buffer device (4) is connected to a hydraulic device (3) and a hydraulic power generation device (7); a wave-shaped groove (2-1) is provided on the side of the inner floating body (2); and the bottom of the inner floating body (2) is connected to the bottom of the outer floating body (1) through the buffer device (4); The outer floating body (1) comprises a buoy (1-2), a partition (1-3) arranged in the buoy (1-2), and an energy-capturing buoy (1-4) sleeved on the buoy (1-2); the cable winding device (5) is located on the partition (1-3); an opening is provided on the partition (1-3), and a guide wheel (1-5) with a rotating shaft is provided in the opening; The nonlinear bistable device (6) comprises a pressure rod (6-1), a spring (6-2), and a sleeve (6-3) fixed on the inner side of a buoy (1-2); one end of the pressure rod (6-1) is connected to a roller (6-4); the other end of the pressure rod (6-1) passes through the sleeve (6-3) and is connected to the sleeve (6-3) via the spring (6-2); the roller (6-4) is embedded in the wave-shaped groove (2-1); The cable winding device (5) comprises a cable winding rope (5-1), a cable winding power generation device (5-2), a transmission shaft (5-3), a spring sheet bracket (5-4) and a spring sheet (5-5); the cable winding power generation device (5-2) and the spring sheet bracket (5-4) are arranged at both ends of the transmission shaft (5-3), and the spring sheet (5-5) is arranged in the spring sheet bracket (5-4) and connected to the transmission shaft (5-3); one end of the cable winding rope (5-1) is connected to the top of the inner floating body (2) through the guide wheel (1-5), and the other end of the cable winding rope is wound around the transmission shaft (5-3).

2. The fully enclosed double-floating wave energy power generation device according to claim 1 is characterized in that: The buffer device comprises a spring buffer (4-2), a buffer plate (4-3), and cross-connected hinged telescopic rods (4-1); one end of the cross-connected hinged telescopic rod (4-1) is connected to the bottom of the buffer plate (4-3) through the spring buffer (4-2), and the other end is connected to the hydraulic device (3).

3. The fully enclosed double-floating wave energy power generation device according to claim 1 is characterized in that: The hydraulic device (3) is located at the bottom of the buoy (1-2).

4. The fully enclosed double-floating wave energy power generation device according to claim 2 is characterized in that: The spring buffer (4-2) comprises a buffer spring (4-2-1), a buffer rod (4-2-2) and a buffer cylinder (4-2-3); the buffer rod (4-2-2) passes through the top of the buffer cylinder (4-2-3), and the buffer spring (4-2-1) is located between the buffer rod (4-2-2) and the buffer cylinder (4-2-3).

5. The fully enclosed double-floating wave energy power generation device according to claim 1 is characterized in that: One end of the pressure rod (6-1) is provided with a hinged fastener (8), and the pressure rod (6-1) is connected to the roller (6-4) via the hinged fastener (8).

6. The fully enclosed double-floating wave energy power generation device according to claim 1 is characterized in that: A hinged fastener (8) is provided at the top of the inner floating body (2), and one end of the winding rope (5-1) is connected to the hinged fastener (8) at the top of the inner floating body (2) through a guide wheel (1-5) in an opening of the partition plate (1-3).

7. The fully enclosed double-floating wave energy power generation device according to claim 1 is characterized in that: The nonlinear bistable device (6) is distributed in multiple layers inside the buoy (1-2).

8. The fully enclosed double-floating wave energy power generation device according to claim 1 is characterized in that: The bottom of the buoy (1-2) is provided with a plurality of hinged fasteners (8), and the hinged fasteners are connected to the buffer plate (4-3) via cross-connected hinged telescopic rods (4-1).

9. The fully enclosed double-floating wave energy power generation device according to claim 1, characterized in that: The inner floating body (2) is located on the buffer plate (4-3) of the buffer device.

10. The fully enclosed double-floating wave energy power generation device according to claim 1, characterized in that: The energy-capturing float (1-4) is an annular hollow float.

Images