Wave energy power generation device for island

Abstract

The invention discloses a wave power generation device for an island, and relates to the technical field of power generation for the island, the wave power generation device comprises a floating body and a fixed support, the floating body floats along with sea waves, an energy generation mechanism and an energy conversion mechanism are arranged on the inner side of the fixed support, the fixed support does not float along with the sea waves, and the energy generation mechanism is arranged on the top surface of the floating body; the fixed support controls the buoyancy difference value of the floating body based on the moving state of the energy generation mechanism, the energy conversion mechanism is connected with a generator through a transmission mechanism and drives the generator through the transmission mechanism, the generator is connected with a frequency-stabilized voltage-stabilized power supply through a wire, and the frequency-stabilized voltage-stabilized power supply outputs stabilized voltage electric energy. The wave power generation device has the advantages of being high in wave energy conversion efficiency, simple and compact in structure and reliable in operation.

Description

Technical Field

[0001] The present invention relates to the technical field of island power generation, and in particular to a wave energy power generation device for an island. Background Art

[0002] There is enormous energy in the ocean, but since most wave power generation technologies mainly convert wave energy through the relative motion mechanism of offshore floating devices, they have problems such as complex mechanisms, low energy conversion efficiency, poor reliability, high cost, and immature technology, making it difficult to commercialize them.

[0003] When utilizing wave energy, existing wave energy power generation devices can only achieve energy conversion once within one wave fluctuation cycle, which limits the energy conversion efficiency of the wave energy power generation device and reduces the power generation effect of the wave energy power generation device. Summary of the Invention

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide a wave energy power generation device for islands, so as to solve the problem in the prior art that the wave energy power generation device can only achieve one energy conversion within one wave fluctuation cycle, resulting in low energy conversion efficiency of the wave energy power generation device.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] Specifically, a wave energy power generation device for islands is provided, which includes a floating body and a fixed support. The floating body floats with the waves. An energy generating mechanism and an energy conversion mechanism are arranged on the inner side of the fixed support, and the fixed support does not float with the waves. The energy generating mechanism is arranged on the top surface of the floating body. The fixed support controls the buoyancy difference of the floating body based on the movement state of the energy generating mechanism. The energy conversion mechanism is connected to a generator through a transmission mechanism. The energy conversion mechanism drives the generator through the transmission mechanism. The generator is connected to a frequency-stabilized and voltage-stabilized power supply through a wire. The frequency-stabilized and voltage-stabilized power supply outputs voltage-stabilized electric energy.

[0007] As a further solution of the present invention: the energy generating mechanism includes a counterweight body, the top surface of the counterweight body is fixedly connected to an external sliding bracket, the top surface of the counterweight body is fixedly connected to an internal first sliding bracket and an internal second sliding bracket near the inner side of the external sliding bracket, an external bracket guide wheel is installed on one side of the external sliding bracket, and an internal bracket guide wheel is installed on one side of the first sliding bracket and the internal second sliding bracket.

[0008] As a further solution of the present invention: the fixed bracket includes an external frame, a support base plate is fixedly connected to the inner middle position of the external frame, and two groups of internal skateboard brackets are fixedly connected to the top surface of the support base plate, and the two groups of internal skateboard brackets are respectively matched with the first sliding bracket and the internal second sliding bracket.

[0009] As a further solution of the present invention: a spring shock absorber is fixedly connected to the middle position of the bottom surface of the supporting base plate, and the spring shock absorber is used to offset the impact force of the counterweight.

[0010] As a further solution of the present invention: the energy conversion mechanism includes a pulley, a forward shaft is fixedly connected to the front center position of the pulley, the end of the forward shaft away from the pulley is engaged with a coaxial reverse mechanism, the coaxial reverse mechanism is engaged with a reverse shaft, the sides of the forward shaft and the reverse shaft are both embedded with ratchet gears and bearing seats, and the forward shaft and the reverse shaft are both engaged with the rack arranged on the side of the internal second sliding bracket through the ratchet gear.

[0011] As a further solution of the present invention: the coaxial reverse mechanism includes a transmission bevel gear, the side of the bevel gear is engaged with a forward axis bevel gear and a reverse axis bevel gear, the forward axis bevel gear and the reverse axis bevel gear are arranged opposite to each other, the forward axis bevel gear is fixedly connected to the end of the forward rotating shaft, and the reverse axis bevel gear is fixedly connected to the end of the reverse rotating shaft.

[0012] As a further solution of the present invention: the frequency-stabilized and voltage-stabilized power supply includes an AC / DC conversion mechanism, the AC / DC conversion mechanism is electrically connected to the generator, and the AC / DC conversion mechanism is connected to a supercapacitor and a voltage-stabilized and frequency-stabilized output mechanism via wires.

[0013] As a further solution of the present invention: a built-in cavity is opened inside the floating body, a solenoid valve is installed on the bottom surface of the built-in cavity, and a water pumping pipe is installed inside the built-in cavity.

[0014] As a further solution of the present invention: a water pumping groove is provided on the bottom surface of the built-in cavity near the bottom end of the water pumping pipe.

[0015] As a further solution of the present invention: an electrical terminal is provided inside the spring shock absorber. When the spring shock absorber is in a maximum compression state, the electrical terminal is activated and is used to control the opening and closing of the solenoid valve.

[0016] Beneficial effects of the present invention:

[0017] In the present invention, by setting up an energy generating mechanism and an energy converting mechanism, mechanical power can be stably transmitted during the upward and downward movement of the counterweight body, so that the pulley always rotates in one direction, and drives the generator to generate electricity through the synchronous belt, which has the advantages of high wave energy conversion efficiency, simple and compact structure, and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic structural diagram of a wave energy power generation device for islands according to the present invention;

[0020] Figure 2 This is a schematic structural diagram of an energy conversion mechanism in a wave energy power generation device for an island according to the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of a ratchet gear in a wave energy power generation device for an island according to the present invention;

[0022] Figure 4 This is a schematic structural diagram of a coaxial reverse mechanism in a wave energy power generation device for an island according to the present invention;

[0023] Figure 5 It is a schematic diagram of the internal structure of a floating body in a wave energy power generation device for an island according to the present invention.

[0024] Explanation of the reference numerals: 1. Floating body; 101. Built-in cavity; 102. Solenoid valve; 103. Support rod; 104. Pumping pipe; 105. Pumping trough; 2. Energy generating mechanism; 201. Counterweight; 202. External sliding bracket; 203. Internal first sliding bracket; 204. External bracket guide wheel; 205. Internal bracket guide wheel; 206. Internal second sliding bracket; 3. Fixed bracket; 301. External frame; 302. Spring shock absorber; 303. Support base plate; 304. Internal skateboard bracket ; 305, internal reinforcement ribs; 4, energy conversion mechanism; 401, pulley; 402, forward shaft; 403, ratchet gear; 404, coaxial reverse mechanism; 4041, transmission bevel gear; 4042, forward shaft bevel gear; 4043, reverse shaft bevel gear; 405, bearing seat; 406, reverse shaft; 407, bearing base; 5, synchronous belt; 6, generator; 7, frequency-stabilized and voltage-stabilized power supply; 701, AC / DC conversion mechanism; 702, supercapacitor; 703, voltage-stabilized and frequency-stabilized output mechanism. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] As an embodiment of the present invention, Figure 1-Figure 4As shown, a wave energy power generation device for an island is disclosed, including a floating body 1 and a fixed bracket 3. The floating body 1 floats with the waves. Since the floating body 1 needs to be immersed in seawater for a long time, the floating body 1 needs to be lightweight and resistant to seawater corrosion, including but not limited to metal alloys, composite materials (glass fiber reinforced plastics), engineering plastics, etc., to ensure that the floating body 1 can float up and down with the waves. An energy generating mechanism 2 and an energy conversion mechanism 4 are provided on the inner side of the fixed bracket 3. The fixed bracket 3 does not float with the waves. The fixed bracket 3 is used to limit the positions of the energy generating mechanism 2 and the energy conversion mechanism 4. Therefore, it needs to be fixed on a plane or platform that does not float with the waves. An island is preferably used, that is, the fixed bracket 3 is fixedly installed at the edge of the island. The floating body 1 is directly immersed in seawater, while the fixed bracket 3 is stabilized on the bottom surface of the island edge. The fixed bracket 3 can also be used on an offshore operating platform or a large ship. It can be used when the large ship is docked to provide electricity for the large ship and reduce the fuel consumption of the large ship.

[0027] The energy generating mechanism 2 is arranged on the top surface of the float 1, that is, the energy generating mechanism 2 is fixedly connected to the float 1, so that when the float 1 floats with the waves, it will also drive the energy generating mechanism 2 to float synchronously, and the floating energy generating mechanism 2 will generate floating potential energy. The fixed bracket 3 controls the buoyancy difference of the float 1 based on the moving state of the energy generating mechanism 2. The buoyancy difference refers to the difference between the buoyancy of the seawater on the float 1 and the weight of the float 1 itself. When the buoyancy of the float 1 remains unchanged, the increase in the weight of the float 1 itself will reduce the buoyancy difference, and the decrease in the weight of the float 1 itself will increase the buoyancy difference. It should be noted that when the waves are more violent, the degree to which the float 1 floats with the waves will also be greatly enhanced. Therefore, the impact of the float 1 on the fixed bracket 3 through the energy generating mechanism 2 is also stronger. Under high-level impact for a long time, the fixed bracket 3 is likely to produce metal fatigue, thereby reducing the service life of the fixed bracket 3. Therefore, when the waves are more violent, the fixed bracket 3 can be adjusted according to the energy generating mechanism. The buoyancy difference of the float 1 is controlled by the movement state of the energy generating mechanism 2 (the impact force or the difference between the upper and lower displacements), specifically the buoyancy of the float 1 in the sea water, that is, when the waves are floating more violently, by increasing the weight of the float 1 and reducing the buoyancy of the float 1, the impact force of the energy generating mechanism 2 on the fixed support 3 is reduced, thereby protecting the overall structure of the fixed support 3, and when the waves are floating relatively gently, the weight of the float 1 is reduced and the buoyancy of the float 1 is increased, so that the float 1 can be adaptively adjusted according to the floating degree of the waves, which not only ensures the potential energy conversion effect of the energy generating mechanism 2, but also protects the overall structure of the fixed support 3. The adjustment range of the difference between the movement state of the energy generating mechanism 2 and the buoyancy of the float 1 is directly adjusted by technical personnel in this field according to the actual installation position of the wave energy power generation device for the island. The adjustment range based on the difference between the movement state of the energy generating mechanism 2 and the buoyancy of the float 1 can be obtained by machine learning, or it can be adaptively adjusted according to experience;

[0028] The energy conversion mechanism 4 is connected to the generator 6 through the transmission mechanism. The energy conversion mechanism 4 drives the generator 6 through the transmission mechanism. The generator 6 is connected to the frequency-stabilized voltage-stabilized power supply 7 through a wire. The frequency-stabilized voltage-stabilized power supply 7 outputs regulated electric energy. It should be noted that after the energy generating mechanism 2 converts the floating potential energy of the floating body 1, the energy generating mechanism 2 transfers the floating potential energy to the energy conversion mechanism 4. The energy conversion mechanism 4 converts the floating potential energy into mechanical power and transmits the mechanical power to the generator 6. The transmission mechanism can be a synchronous belt 5 or a gear or other mechanism that can transmit mechanical power, so that the generator 6 works to generate electrical energy. After the generator 6 works to generate electrical energy, the electrical energy can be transmitted to the frequency-stabilized voltage-stabilized power supply 7 through a wire. The frequency-stabilized voltage-stabilized power supply 7 can adjust the frequency and voltage of the electrical energy, and then transmit it to the corresponding electrical equipment, thereby realizing the recycling of wave energy.

[0029] As an embodiment of the present invention, Figure 1-Figure 4 As shown, the energy generating mechanism 2 includes a counterweight body 201, the top surface of the counterweight body 201 is fixedly connected to an external sliding bracket 202, the top surface of the counterweight body 201 is fixedly connected to an internal first sliding bracket 203 and an internal second sliding bracket 206 near the inner side of the external sliding bracket 202, an external bracket guide wheel 204 is installed on one side of the external sliding bracket 202, and an internal bracket guide wheel 205 is installed on one side of the internal first sliding bracket 203 and the internal second sliding bracket 206. It should be noted that the bottom surface of the counterweight body 201 is fixedly connected to the top surface of the floating body 1, so that the floating body 1 is When floating, it can drive the counterweight body 201 to float synchronously. There are two groups of external sliding brackets 202, which are symmetrically arranged on the top surface of the counterweight body 201, and the two groups of external sliding brackets 202 roll and abut against the inner side surface of the fixed bracket 3 through the external bracket guide wheel 204. In this way, the floating of the counterweight body 201 can be limited by the external sliding bracket 202, so that the counterweight body 201 can move up and down stably on the inner side of the fixed bracket 3 along the vertical direction. The number of external bracket guide wheels 204 set on the external sliding bracket 202 is at least two, which ensures the stability of the external sliding bracket 202 when moving.

[0030] As an embodiment of the present invention, Figure 1-Figure 4 As shown, the fixed bracket 3 includes an external frame 301, and a support base plate 303 is fixedly connected to the inner middle position of the external frame 301, and two groups of internal skateboard brackets 304 are fixedly connected to the top surface of the support base plate 303. The two groups of internal skateboard brackets 304 respectively cooperate with the internal first sliding bracket 203 and the internal second sliding bracket 206. It should be noted that a number of internal reinforcing ribs 305 are also fixedly connected to the inner side of the external frame 301. The internal reinforcing ribs 305 are used to improve the overall strength of the external frame 301. The external frame 301 needs to be fixed on a plane or platform (island, seaside land, large ships, etc.). The two groups of internal skateboard brackets 304 roll and abut against the internal bracket guide wheel 205 on the internal second sliding bracket 206 to limit the displacement of the internal second sliding bracket 206, so that the internal second sliding bracket 206 can move up and down stably along the vertical direction.

[0031] As an embodiment of the present invention, Figure 1-Figure 4As shown, a spring shock absorber 302 is fixedly connected to the middle position of the bottom surface of the supporting base plate 303. The spring shock absorber 302 is used to offset the impact force of the counterweight body 201. It should be noted that a spring is arranged inside the spring shock absorber 302, and the top end of the spring shock absorber 302 is fixedly connected to the bottom surface of the supporting base plate 303. When the counterweight body 201 moves upward in the vertical direction as the floating body 1 floats, the top surface of the counterweight body 201 will act on the bottom surface of the spring shock absorber 302. In this way, the spring shock absorber 302 can absorb the impact force of the upward displacement of the counterweight body 201, reduce the impact of the counterweight body 201 on the overall structure of the fixed bracket 3, and make the island wave energy power generation device more stable when in use. The specifications and quantity of the springs used in the spring shock absorber 302 and the installation position can be arbitrarily set by those skilled in the art to ensure that the impact force of the counterweight body 201 can be absorbed smoothly.

[0032] As an embodiment of the present invention, Figure 1-Figure 4 As shown, the energy conversion mechanism 4 includes a pulley 401, and the front center position of the pulley 401 is fixedly connected to a forward rotating shaft 402, and the end of the forward rotating shaft 402 away from the pulley 401 is meshed with a coaxial reverse mechanism 404, and the coaxial reverse mechanism 404 is meshed with a reverse shaft 406. The sides of the forward rotating shaft 402 and the reverse shaft 406 are both nested with a ratchet gear 403 and a bearing seat 405, and the forward rotating shaft 402 and the reverse shaft 406 are both meshed with the rack set on the side of the internal second sliding bracket 206 through the ratchet gear 403. It should be noted that the bottom surface of the bearing seat 405 is connected to the bearing base 407 by bolts, and the bearing base 407 is fixed to the inside of the fixed bracket 3 by bolts. The specific fixed position is adaptively adjusted by those skilled in the art according to the position of the bearing base 407. Even if there is no corresponding fixed surface inside the fixed bracket 3, those skilled in the art can also A corresponding fixing surface (fixing plate) can be added at an appropriate position inside the fixed bracket 3 to fix the position of the bearing base 407. Since the forward shaft 402 and the reverse shaft 406 are fixed to the inside of the fixed bracket 3 through the bearing base 407, when the internal second sliding bracket 206 moves upward, the internal second sliding bracket 206 will drive the ratchet gear 403 on the side of the forward shaft 402 through the rack thereon, so that the ratchet gear 403 can drive the forward shaft 402 to rotate synchronously, and the rotating forward shaft 402 can drive the pulley 401 to rotate, and the rotating pulley 401 can drive the generator 6 through the synchronous belt 5, so that the generator 6 performs power generation operation, and the ratchet gear 403 arranged on the side of the reverse shaft 406 will not drive the reverse shaft 406 to rotate when the internal second sliding bracket 206 moves upward, so it will not affect the rotation of the forward shaft 402;

[0033] When the internal second sliding bracket 206 moves downward, the situation is just the opposite. The rack on the internal second sliding bracket 206 drives the reverse shaft 406 to rotate in the opposite direction through the ratchet gear 403 on the reverse shaft 406. The reversely rotating reverse shaft 406 causes the forward shaft 402 to rotate forward again through the coaxial reverse mechanism 404, and the ratchet gear 403 on the side of the forward shaft 402 does not affect the rotation of the forward shaft 402. In this way, the internal second sliding bracket 206 can drive the forward shaft 402 to rotate forward when moving upward or downward, so that the pulley 401 always rotates in one direction, and drives the generator 6 to generate electricity through the synchronous belt 5.

[0034] As an embodiment of the present invention, Figure 1-Figure 4 As shown, the coaxial reverse mechanism 404 includes a transmission bevel gear 4041, and the side of the transmission bevel gear 4041 is meshed with a forward axis bevel gear 4042 and a reverse axis bevel gear 4043. The forward axis bevel gear 4042 and the reverse axis bevel gear 4043 are arranged opposite to each other. The forward axis bevel gear 4042 is fixedly connected to the end of the forward rotating shaft 402, and the reverse axis bevel gear 4043 is fixedly connected to the end of the reverse rotating shaft 406. It should be noted that, as shown in FIG. Figure 3 As shown, when the forward shaft 402 drives the transmission bevel gear 4041 to rotate counterclockwise through the forward shaft bevel gear 4042, the counterclockwise rotating transmission bevel gear 4041 will inevitably drive the reverse shaft bevel gear 4043 to rotate in the opposite direction of the rotation direction of the forward shaft bevel gear 4042, thereby realizing the different direction rotation of the forward shaft 402 and the reverse shaft 406.

[0035] As an embodiment of the present invention, Figure 1-Figure 4 As shown, the frequency-stabilized and voltage-stabilized power supply 7 includes an AC / DC conversion mechanism 701, which is electrically connected to the generator 6. The AC / DC conversion mechanism 701 is connected to a supercapacitor 702 and a voltage-stabilized and frequency-stabilized output mechanism 703 through wires. It should be noted that the AC / DC conversion mechanism 701 is mainly used to convert alternating current (AC) into direct current (DC). The AC / DC conversion mechanism 701 can be any one of a diode rectifier, a thyristor (silicon-controlled rectifier) ​​rectifier, and a PWM rectifier. The AC / DC conversion mechanism 701 only needs to be able to convert AC into DC. The supercapacitor 702 is an energy storage device between traditional capacitors and batteries. It achieves energy storage through physical charge adsorption / desorption or rapid redox reaction and has characteristics such as high power density, rapid charge and discharge, and long cycle life. The specific specifications of the supercapacitor 702 are adaptively selected by those skilled in the art based on the actual output power of the generator 6 to ensure that the unstable output power generated by the generator 6 can be stored. The voltage-stabilized and frequency-stabilized output mechanism 703 can use an inverter that is compatible with the output power of the generator 6.

[0036] As an embodiment of the present invention, Figure 1-Figure 4 As shown, a built-in cavity 101 is provided inside the float 1, and a solenoid valve 102 is installed on the bottom surface of the built-in cavity 101. A water extraction pipe 104 is installed inside the built-in cavity 101. It should be noted that the built-in cavity 101 is adaptively selected according to the shape and volume of the float 1. The solenoid valve 102 is arranged on the bottom surface of the built-in cavity 101. When the solenoid valve 102 is opened, seawater can enter the built-in cavity 101 through the solenoid valve 102, thereby increasing the weight of the float 1 and making the buoyancy difference of the float 1 in the seawater smaller. The value decreases, so the floating effect of the float 1 will be reduced, conversely, the floating effect of the float 1 will be enhanced. After the top of the suction pipe 104 passes through the float 1, a water pump can be connected. The water pump is used to extract the seawater in the built-in cavity 101 through the suction pipe 104 and discharge it directly back into the sea. The water pump can be set in the built-in cavity 101 or installed on the counterweight body 201 to ensure that it does not affect the suction pipe 104 to extract the seawater inside the built-in cavity 101. The electric energy of the water pump can be provided by the stabilized frequency and voltage power supply 7.

[0037] As an embodiment of the present invention, Figure 5 As shown, a water suction groove 105 is provided on the bottom surface of the built-in cavity 101 near the bottom end of the water suction pipe 104, and a support rod 103 is provided inside the built-in cavity 101 to improve the overall strength of the built-in cavity 101. The water suction groove 105 is recessed downward on the bottom surface of the built-in cavity 101, so that seawater will accumulate in the water suction groove 105, ensuring that the water suction pipe 104 can drain the seawater inside the built-in cavity 101 when working.

[0038] As an embodiment of the present invention, Figure 1-Figure 4As shown, the spring shock absorber 302 is provided with an electrical terminal inside. When the spring shock absorber 302 is in the maximum compression state, the electrical terminal is started, and the electrical terminal is used to control the opening and closing of the solenoid valve 102. It should be noted that the electric energy of the solenoid valve 102 is supplied by the frequency-stabilized and voltage-stabilized power supply 7. The cable layout between the solenoid valve 102 and the frequency-stabilized and voltage-stabilized power supply 7 is adaptively set by technical personnel in this field according to the internal conditions of the fixed bracket 3 to ensure that it does not affect the operation of the energy generating mechanism 2 and the energy conversion mechanism 4. The electrical terminal can be replaced with a pressure sensor, and the pressure sensor collects the impact force of the counterweight 201 on the spring shock absorber 302 during the upward movement, and sets a pressure threshold. When the pressure value collected by the pressure sensor is greater than or equal to the pressure threshold, it means that the impact force of the energy generating mechanism 2 is large. Therefore, the pressure value can be converted into an electrical signal to control the start of the solenoid valve 102, so that the solenoid valve 102 is opened. In this way, the weight of the float 1 itself can be increased, thereby reducing the buoyancy difference of the float 1, and thus reducing the impact force of the energy generating mechanism 2. The pressure threshold can be set in multiple sections, such as pressure threshold A, pressure threshold B, and pressure threshold C. Each pressure threshold represents the opening time of the solenoid valve 102, or a liquid level gauge is installed inside the built-in cavity 101, and the depth of seawater in the built-in cavity 101 is collected by the liquid level gauge. Different pressure thresholds represent different depths of seawater in the built-in cavity 101. When the liquid level gauge collects that the depth of seawater in the built-in cavity 101 reaches a preset value, the solenoid valve 102 can be closed. When the pressure threshold does not match the depth of seawater in the built-in cavity 101, for example, the depth of seawater in the built-in cavity 101 is too deep, the seawater in the built-in cavity 101 can be pumped out by a water pump to reduce the depth. For example, if the depth of seawater in the built-in cavity 101 is too shallow, the solenoid valve 102 can be opened to allow seawater to enter the built-in cavity 101.

[0039] It should be noted that when the float 1 moves upward, the height of the float 1 will inevitably increase. In order to prevent the seawater in the built-in cavity 101 from leaking from the solenoid valve 102, a one-way valve can also be set in the solenoid valve 102 to ensure that seawater can only enter but not exit the solenoid valve 102.

[0040] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A wave energy power generation device for islands, characterized in that: include: a floating body (1) which floats with the waves; A fixed support (3) is provided with an energy generating mechanism (2) and an energy converting mechanism (4) on its inner side, and the fixed support (3) does not float with the waves, wherein the energy generating mechanism (2) is provided on the top surface of the floating body (1), and the fixed support (3) controls the buoyancy difference of the floating body (1) based on the movement state of the energy generating mechanism (2); A generator (6) is provided with a transmission mechanism between the generator (6) and the energy conversion mechanism (4), and the energy conversion mechanism (4) drives the generator (6) through the transmission mechanism; A frequency-stabilized voltage power supply (7) is connected to the generator (6) via a wire and outputs voltage-stabilized electric energy.

2. The wave energy power generation device for islands according to claim 1, characterized in that: The energy generating mechanism (2) comprises a counterweight body (201), the top surface of the counterweight body (201) is fixedly connected to an external sliding bracket (202), the top surface of the counterweight body (201) is fixedly connected to an internal first sliding bracket (203) and an internal second sliding bracket (206) at an inner position close to the external sliding bracket (202), an external bracket guide wheel (204) is installed on one side of the external sliding bracket (202), and an internal bracket guide wheel (205) is installed on one side of the first sliding bracket (203) and the internal second sliding bracket (206).

3. The wave energy power generation device for islands according to claim 1, characterized in that: The fixed bracket (3) comprises an external frame (301), a support base plate (303) is fixedly connected to the inner middle position of the external frame (301), and two groups of internal slide brackets (304) are fixedly connected to the top surface of the support base plate (303), and the two groups of internal slide brackets (304) are respectively matched with the first sliding bracket (203) and the internal second sliding bracket (206).

4. The wave energy power generation device for islands according to claim 3, characterized in that: A spring shock absorber (302) is fixedly connected to the middle position of the bottom surface of the supporting base plate (303), and the spring shock absorber (302) is used to offset the impact force of the counterweight (201).

5. The wave energy power generation device for islands according to claim 1, characterized in that: The energy conversion mechanism (4) comprises a pulley (401), a forward rotating shaft (402) is fixedly connected to the center position of the front circle of the pulley (401), an end of the forward rotating shaft (402) away from the pulley (401) is meshed with a coaxial reverse mechanism (404), the coaxial reverse mechanism (404) is meshed with a reverse shaft (406), ratchet gears (403) and bearing seats (405) are embedded in the sides of the forward rotating shaft (402) and the reverse shaft (406), and the forward rotating shaft (402) and the reverse shaft (406) are meshed with a rack provided on the side of the internal second sliding bracket (206) through the ratchet gear (403).

6. The wave energy power generation device for islands according to claim 5, characterized in that: The coaxial reverse mechanism (404) comprises a transmission bevel gear (4041), a forward bevel gear (4042) and a reverse bevel gear (4043) being meshed on the side of the bevel gear (4041), the forward bevel gear (4042) and the reverse bevel gear (4043) being arranged opposite to each other, the forward bevel gear (4042) being fixedly connected to the end of the forward rotating shaft (402), and the reverse bevel gear (4043) being fixedly connected to the end of the reverse rotating shaft (406).

7. The wave energy power generation device for islands according to claim 1, characterized in that: The frequency-stabilized and voltage-stabilized power supply (7) comprises an AC / DC conversion mechanism (701), the AC / DC conversion mechanism (701) is electrically connected to the generator (6), and the AC / DC conversion mechanism (701) is connected to a super capacitor (702) and a voltage-stabilized and frequency-stabilized output mechanism (703) via electric wires.

8. The wave energy power generation device for islands according to claim 1, characterized in that: A built-in cavity (101) is provided inside the floating body (1), a solenoid valve (102) is installed on the bottom surface of the built-in cavity (101), and a water pumping pipe (104) is installed inside the built-in cavity (101).

9. The wave energy power generation device for islands according to claim 8, characterized in that: A water extraction groove (105) is provided on the bottom surface of the built-in cavity (101) near the bottom end of the water extraction pipe (104).

10. The wave energy power generation device for islands according to claim 4, characterized in that: An electrical terminal is provided inside the spring shock absorber (302). When the spring shock absorber (302) is in a maximum compression state, the electrical terminal is activated, and the electrical terminal is used to control the opening and closing of the solenoid valve (102).

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