Internal oscillating wave power device and wave power system based on gravity balance assembly

Abstract

The application discloses an internal oscillation wave power generation device and a wave power generation system based on a gravity balance assembly, which comprises a closed shell, a gravity balance assembly, an elastic support assembly, a PTO rotor assembly and a PTO main shaft; the gravity balance assembly, the elastic support assembly, the PTO rotor assembly and the PTO main shaft are arranged in the closed shell; the PTO rotor assembly is sleeved on the PTO main shaft; the two ends of the PTO main shaft are connected with the inner wall of the closed shell; one end of the elastic support assembly is connected with the PTO rotor assembly, and the other end is connected with the inner wall of the closed shell along the axial direction of the PTO main shaft; the gravity balance assembly is connected with the PTO rotor assembly and applies a balance force to the PTO rotor assembly along the axial direction of the PTO main shaft, and the balance force is opposite to the gravity direction of the PTO rotor assembly; when the closed shell is impacted by waves, the PTO main shaft drives the PTO rotor assembly to reciprocate along the axial direction of the PTO main shaft to generate electricity.

Description

Technical Field

[0001] This invention relates to the field of wave power generation technology, and in particular to an internal oscillation wave power generation device and wave power generation system based on a gravity balance component. Background Technology

[0002] Ocean energy, as a renewable energy source, has broad development prospects and significant strategic importance due to its abundant and widely distributed resources, and its close connection to the Earth's natural environment. Wave energy generation, as a clean and renewable energy technology, also holds great promise. With continuous technological advancements and market maturation, wave energy generation is expected to become an important supplement to the energy sector in the future.

[0003] In wave energy generation devices, especially those relying on inertial floating oscillators, most implementations utilize spring mechanisms to increase the inertial capacity of the resonator. However, existing spring mechanisms suffer from pre-compression of the springs in the initial state due to the weight of the resonator itself, leading to an imbalance of pressure and tension between the upper and lower springs during actual power generation. Summary of the Invention

[0004] The purpose of this invention is to provide an internal oscillation wave power generation device and wave power generation system based on a gravity balancing component. By using a gravity balancing component to balance the mass of the oscillator itself, the problem of spring pre-compression caused by the weight of the oscillator is solved, so that the springs in the upper and lower parts of the oscillator can be equivalent to a single extension spring. This simplifies the calculation of the spring elastic coefficients of the upper and lower parts, reduces the difficulty of the overall design of the float, and improves the accuracy of the design.

[0005] To solve the above-mentioned technical problems, a first aspect of the present invention provides an internal oscillation wave power generation device based on a gravity balance component, comprising: a closed shell, a gravity balance component, an elastic support component, a PTO mover component, and a PTO main shaft;

[0006] The gravity balance assembly, elastic support assembly, PTO mover assembly, and PTO spindle are disposed inside the enclosed housing;

[0007] The PTO mover assembly is sleeved on the PTO spindle;

[0008] The two ends of the PTO spindle are connected to the inner wall of the enclosed housing;

[0009] One end of the elastic support component is connected to the PTO mover component, and the other end is connected to the inner wall of the enclosed housing along the axial direction of the PTO main shaft.

[0010] The gravity balancing component is connected to the PTO mover component and applies a balancing force to the PTO mover component along the PTO main axis. The balancing force is opposite to the direction of gravity of the PTO mover component.

[0011] When the enclosed shell is subjected to wave impact, the PTO motor assembly is driven to reciprocate along the PTO main shaft axis to generate electricity.

[0012] Furthermore, the gravity balance component includes: a plurality of spring units and a transmission unit corresponding to each spring unit;

[0013] The spring unit is fixed to the inner wall of the enclosed housing;

[0014] One end of the transmission unit is connected to the PTO mover assembly, and the other end is connected to the spring unit;

[0015] As the PTO mover assembly reciprocates along the PTO main shaft, the spring unit applies the balancing force to the PTO mover assembly via the transmission unit.

[0016] Furthermore, the spring unit includes a spring bracket and a spring, and the transmission unit includes a support rod, a gear, and a rack;

[0017] The spring bracket is fixed to the inner side wall of the enclosed outer shell, and the spring is disposed in the spring groove of the spring bracket;

[0018] One end of the support rod abuts against the PTO mover assembly, and the other end is fixedly connected to the gear and rotates synchronously with the gear. One end of the rack abuts against the spring. The gear and rack are rotatably connected and drive the rack to reciprocate along the spring axis. When the spring is in a stretched state, the rack compresses or stretches the spring along the spring axis. When the PTO mover assembly moves along the PTO main shaft axis, the balancing force is applied to the PTO mover assembly in sequence through the rack, the gear and the support rod.

[0019] Furthermore, one end of the support rod is fixedly connected to one side wall of the gear, and the other end slides against the bottom of the PTO mover assembly;

[0020] One end of the rack abuts against the spring, and the side away from the gear is slidably connected to the spring bracket. During the reciprocating movement along the axial direction of the spring, the side of the rack facing the gear has straight teeth corresponding to the gear.

[0021] When the PTO mover assembly reciprocates along the PTO main shaft, it drives the gear to rotate via the support rod. When the gear rotates, it drives the rack to slide reciprocally along the spring axis.

[0022] Furthermore, the sidewall of the PTO actuator assembly is provided with limiting units that correspond one-to-one with the spring units;

[0023] The limiting unit includes a first limiting post and a second limiting post arranged along the axial direction of the PTO main shaft.

[0024] One end of the support rod near the PTO mover assembly passes between the first limiting post and the second limiting post. One side of the support rod is rotatably connected to the first limiting post, and the other side is rotatably connected to the second limiting post.

[0025] Furthermore, the spring unit includes: a coil spring;

[0026] The transmission unit includes: a connecting rope;

[0027] The coil spring is disposed at the top of the inner wall of the enclosed housing;

[0028] One end of the connecting rope is connected to the PTO mover assembly, and the other end is connected to the outer end of the corresponding coil spring.

[0029] Several of the coil springs apply a tension opposite to the gravity of the PTO mover assembly along the PTO main shaft axial direction via corresponding connecting ropes.

[0030] Furthermore, the connecting rope includes: nylon rope or steel wire rope.

[0031] Furthermore, the PTO spindle includes several transmission racks;

[0032] The PTO mover assembly includes a transmission gear that is actively connected to the transmission rack, and the transmission gear is also rotatably connected to the generator gear in the PTO mover assembly;

[0033] When waves impact the enclosed housing, the transmission rack on the PTO main shaft moves back and forth vertically along with the enclosed housing, and drives the generator gear to rotate and generate electricity through the transmission gear.

[0034] Furthermore, the PTO spindle includes a first transmission rack and a second transmission rack;

[0035] The PTO mover assembly includes a first transmission gear and a second transmission gear meshing with the first transmission rack, and also includes a third transmission gear and a fourth transmission gear meshing with the second transmission rack.

[0036] The generator gear meshes with the first transmission gear (421) and the second transmission gear (422) respectively, or with the third transmission gear and the fourth transmission gear respectively, wherein the first transmission gear meshes with the third transmission gear, and the second transmission gear meshes with the fourth transmission gear.

[0037] Accordingly, a second aspect of the present invention provides a wave power generation system, including a plurality of the above-described internal oscillation wave power generation devices based on gravity balance components.

[0038] Furthermore, the wave power generation system also includes: a shell fixing device;

[0039] The outer shell fixing device is connected to each of the internal oscillating wave power generation devices by means of a catenary mooring.

[0040] The above-described technical solutions of the embodiments of the present invention have the following beneficial technical effects:

[0041] 1. By using a gravity balancing component to balance the mass of the PTO mover assembly itself, the problem of spring pre-compression caused by the weight of the PTO mover assembly is solved. This allows the springs in the upper and lower parts of the PTO mover assembly to be equivalent to a single extension spring, simplifying the calculation of the spring coefficients of the upper and lower parts, reducing the difficulty of the overall design of the float, and improving the accuracy of the design.

[0042] 2. The gear set and motor set in the PTO mover assembly cooperate with the rack set in the PTO main shaft to move the enclosed shell back and forth along the PTO main shaft under the drive of the waves, and the wave energy is transmitted to the generator to generate electricity through the rack set and gear set. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the internal oscillation wave power generation device provided in an embodiment of the present invention. Figure 1 ;

[0044] Figure 2 This is a cross-sectional view of the internal oscillation wave power generation device provided in an embodiment of the present invention. Figure 1 ;

[0045] Figure 3 This is a schematic diagram of the internal oscillation wave power generation device provided in an embodiment of the present invention. Figure 2 ;

[0046] Figure 4 This is a cross-sectional view of the internal oscillation wave power generation device provided in an embodiment of the present invention. Figure 2 ;

[0047] Figure 5 This is a partially enlarged view of a gravity balancing component provided in an embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of another gravity balancing component provided in an embodiment of the present invention. Figure 1 ;

[0049] Figure 7 This is a schematic diagram of another gravity balancing component provided in an embodiment of the present invention. Figure 2 .

[0050] Figure label:

[0051] 1. Enclosed housing; 2. Gravity balance assembly; 21. Spring unit; 211. Spring bracket; 212. Spring; 213. Coil spring; 22. Transmission unit; 221. Support rod; 222. Gear; 223. Rack; 224. Connecting rope; 225. Third fixed pulley; 3. Elastic support assembly; 4. PTO mover assembly; 411. First limiting post; 412. Second limiting post; 421. First transmission gear; 422. Second transmission gear; 423. Third transmission gear; 424. Fourth transmission gear; 5. PTO main shaft; 51. First transmission rack; 52. Second transmission rack; 6. Generator gear. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0053] Please refer to Figure 1 The first aspect of this invention provides an internal oscillation wave power generation device based on a gravity balancing component, comprising: a closed shell 1, a gravity balancing component 2, an elastic support component 3, a PTO mover component 4, and a PTO main shaft 5; the gravity balancing component 2, the elastic support component 3, the PTO mover component 4, and the PTO main shaft 5 are disposed inside the closed shell 1; the PTO mover component 4 is sleeved on the PTO main shaft 5; both ends of the PTO main shaft 5 are connected to the inner wall of the closed shell 1; one end of the elastic support component 3 is connected to the PTO mover component 4, and the other end is connected to the inner wall of the closed shell 1 along the axial direction of the PTO main shaft 5; the gravity balancing component 2 is connected to the PTO mover component 4 and applies a balancing force to the PTO mover component 4 along the axial direction of the PTO main shaft 5, the balancing force being opposite to the direction of gravity of the PTO mover component 4; when the closed shell 1 is subjected to wave impact, the PTO mover component 4 is driven to reciprocate along the axial direction of the PTO main shaft 5 to generate electricity.

[0054] If two springs are used as spring devices, distributed on the upper and lower sides of the PTO mover assembly 4 respectively, since the oscillator and linear motor mover in the PTO mover assembly 4 have their own mass, when the system is at rest and in equilibrium, the spring above the PTO mover assembly 4 will be stretched and the spring below the PTO mover assembly 4 will be compressed. Therefore, the springs themselves will have a compression when the float is at rest, resulting in the PTO mover assembly 4 being subjected to different forces when it moves upward and downward at the same rate.

[0055] Therefore, by installing a gravity balancing component 2 inside the enclosed housing to overcome the weight of each component in the PTO mover assembly 4, a balancing force equal to or close to the weight of the PTO mover assembly 4 is provided, reducing or eliminating the problem of uneven force on the upper and lower springs caused by the weight of the PTO mover assembly 4. Optionally, the aforementioned balancing force can be a thrust applied to the PTO mover assembly 4 from bottom to top, or a tension applied to the PTO mover assembly 4 from top to bottom; as long as it can counteract the weight of the PTO mover assembly 4, the requirements are met.

[0056] Specifically, the gravity balancing assembly 2 includes: a plurality of spring units 21 and a transmission unit 22 corresponding to each spring unit 21; the spring units 21 are fixed to the inner wall of the enclosed housing 1; one end of the transmission unit 22 is connected to the PTO mover assembly 4, and the other end is connected to the spring unit 21; when the PTO mover assembly 4 reciprocates along the PTO main shaft 5, the spring units 21 apply a balancing force to the PTO mover assembly 4 through the transmission unit 22.

[0057] In one specific embodiment of the present invention, please refer to Figures 1-5 The spring unit 21 includes a spring bracket 211 and a spring 212. The transmission unit 22 includes a support rod 221, a gear 222, and a rack 223. The spring bracket 211 is fixed to the inner wall of the enclosed housing 1, and the spring 212 is disposed in the spring groove of the spring bracket 211. One end of the support rod 221 abuts against the PTO mover assembly 4, and the other end is fixedly connected to the gear 222 and rotates synchronously with the gear 222. One end of the rack 223 abuts against the spring 212. The gear 222 is rotatably connected to the rack 223 and drives the rack 223 to reciprocate along the axial direction of the spring 212. The rack 223 compresses or stretches the spring 212 when the spring 212 is in a stretched state. When the PTO mover assembly 4 moves along the axial direction of the PTO main shaft 5, a balancing force is applied to the PTO mover assembly 4 in sequence through the rack 223, the gear 222, and the support rod 221.

[0058] Furthermore, one end of the support rod 221 is fixedly connected to one side wall of the gear 222, and the other end slides against the bottom of the PTO mover assembly 4; one end of the rack 223 abuts against the spring 212, and the side away from the gear 222 is slidably connected to the spring bracket 211. During the reciprocating movement along the axial direction of the spring 212, the side of the rack 223 facing the gear 222 is provided with straight teeth corresponding to the gear 222; when the PTO mover assembly 4 reciprocates along the axial direction of the PTO main shaft 5, it drives the gear 222 to rotate through the support rod 221, and when the gear 222 rotates, it drives the rack 223 to slide back and forth along the axial direction of the spring 212.

[0059] The spring 212 in the aforementioned spring unit 21 is always in a stretched state. As the wave drives the enclosed outer shell 1 to reciprocate, the support rod 221 also reciprocates. The spring 212, which is always in a stretched state, drives the support rod 221 in sequence through the rack 223 and the gear 222. The support rod 221 provides an upward thrust to the PTO mover assembly 4, which is balanced by the gravity of the PTO mover assembly 4.

[0060] Furthermore, the side wall of the PTO mover assembly 4 is provided with a limiting unit corresponding to the spring unit 21; the limiting unit includes a first limiting post 411 and a second limiting post 412 arranged axially along the PTO main shaft 5; one end of the support rod 221 near the PTO mover assembly 4 passes between the first limiting post 411 and the second limiting post 412, one side of the support rod 221 is rotatably connected to the first limiting post 411, and the other side is rotatably connected to the second limiting post 412.

[0061] By using the two fixed pulleys arranged along the main axis of the PTO, the support rod 221 can be limited, so that the tension of the spring 212 in the spring unit 21 can always act on the support rod 221, and the support rod 221 can then apply an upward thrust to the PTO mover assembly 4 to overcome the gravity of the PTO mover assembly 4.

[0062] In another specific embodiment of the present invention, please refer to Figure 6 and Figure 7 The spring unit 21 includes a coil spring 213; the transmission unit 22 includes a connecting rope 224; the coil spring 213 is disposed on the top of the inner wall of the enclosed housing 1; one end of the connecting rope 224 is connected to the PTO mover assembly 4, and the other end is connected to the outer end of the corresponding coil spring 213; a plurality of coil springs 213 apply a pulling force opposite to the gravity of the PTO mover assembly 4 along the PTO main shaft 5 axially through the corresponding connecting rope 224.

[0063] Optionally, the connecting rope 224 may include: nylon rope or steel wire rope.

[0064] In addition, the PTO spindle 5 includes several drive racks; the PTO mover assembly 4 includes a drive gear that is actively connected to the drive racks, and the drive gear is also rotatably connected to the generator gear 6 in the PTO mover assembly 4. When waves impact the enclosed housing 1, the drive racks on the PTO spindle 5 reciprocate vertically with the enclosed housing 1, and drive the generator gear 6 to rotate and generate electricity through the drive gears.

[0065] Specifically, in an optional embodiment of the present invention, the PTO spindle 5 includes a first transmission rack 51 and a second transmission rack 52; the PTO mover assembly 4 includes a first transmission gear 421 and a second transmission gear 422 corresponding to the first transmission rack 51, and also includes a third transmission gear 423 and a fourth transmission gear 424 corresponding to the second transmission rack 52; the first transmission gear 421, the second transmission gear 422, the third transmission gear 423 and the fourth transmission gear 424 are respectively rotatably connected to the generator gear 6.

[0066] Depend on Figure 2 , Figure 4 and Figure 7 It can be clearly seen that the generator gear 6 meshes with the first transmission gear 421 and the second transmission gear 422 respectively, or with the third transmission gear 423 and the fourth transmission gear 424 respectively, while the first transmission gear 421 meshes with the third transmission gear 423, and the second transmission gear 422 meshes with the fourth transmission gear 424.

[0067] When the generator gear 6 meshes with the first transmission gear 421 and the second transmission gear 422 respectively, the wave energy transmitted by the second transmission rack 52 is transmitted to the first transmission gear 421 and the second transmission gear 422 through the third transmission gear 423 and the fourth transmission gear 424 respectively, and then transmitted to the generator gear 6 by the first transmission gear 421 and the second transmission gear 422 to generate electricity.

[0068] When the generator gear 6 meshes with the third transmission gear 423 and the fourth transmission gear 424 respectively, the wave energy transmitted by the first transmission rack 51 is transmitted to the third transmission gear 423 and the fourth transmission gear 424 through the first transmission gear 421 and the second transmission gear 422 respectively, and then transmitted to the generator gear 6 by the third transmission gear 423 and the fourth transmission gear 424 to generate electricity.

[0069] Accordingly, a second aspect of the present invention provides a wave power generation system, including a plurality of the above-described internal oscillation wave power generation devices based on gravity balance components.

[0070] Furthermore, the wave power generation system also includes: an outer shell fixing device; the outer shell fixing device is connected to each internal oscillating wave power generation device by means of a catenary mooring.

[0071] This invention aims to protect an internal oscillation wave power generation device based on a gravity balancing component, comprising: a closed shell, a gravity balancing component, an elastic support component, a PTO mover component, and a PTO main shaft; the gravity balancing component, the elastic support component, the PTO mover component, and the PTO main shaft are disposed inside the closed shell; the PTO mover component is sleeved on the PTO main shaft; both ends of the PTO main shaft are connected to the inner wall of the closed shell; one end of the elastic support component is connected to the PTO mover component, and the other end is connected to the inner wall of the closed shell along the axial direction of the PTO main shaft; the gravity balancing component is connected to the PTO mover component and applies a balancing force to the PTO mover component along the axial direction of the PTO main shaft, the balancing force being opposite to the direction of gravity of the PTO mover component; when the closed shell is subjected to wave impact, the PTO mover component is driven to reciprocate along the axial direction of the PTO main shaft to generate electricity. The above technical solution has the following effects:

[0072] 1. By using a gravity balancing component to balance the mass of the PTO mover assembly itself, the problem of spring pre-compression caused by the weight of the PTO mover assembly is solved. This allows the springs in the upper and lower parts of the PTO mover assembly to be equivalent to a single extension spring, simplifying the calculation of the spring coefficients of the upper and lower parts, reducing the difficulty of the overall design of the float, and improving the accuracy of the design.

[0073] 2. The gear set and motor set in the PTO mover assembly cooperate with the rack set in the PTO main shaft to move the enclosed shell back and forth along the PTO main shaft under the drive of the waves, and the wave energy is transmitted to the generator to generate electricity through the rack set and gear set;

[0074] 3. By installing anti-collision blocks at the connection end between the PTO spindle and the enclosed housing, the PTO mover assembly is prevented from violently colliding with the inner wall of the enclosed housing due to excessive waves, thus improving the safety of the equipment.

[0075] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An internal oscillation wave power generation device based on a gravity balance component, characterized in that, include: Enclosed housing (1), gravity balance assembly (2), elastic support assembly (3), PTO mover assembly (4) and PTO spindle (5); The gravity balance assembly (2), elastic support assembly (3), PTO mover assembly (4) and PTO spindle (5) are disposed inside the enclosed housing (1); The PTO mover assembly (4) is sleeved on the PTO spindle (5); The two ends of the PTO spindle (5) are connected to the inner wall of the enclosed housing (1); One end of the elastic support component (3) is connected to the PTO mover component (4), and the other end is connected to the inner wall of the closed shell (1) along the axial direction of the PTO main shaft (5). The gravity balancing component (2) is connected to the PTO mover component (4) and applies a balancing force to the PTO mover component (4) along the PTO main shaft (5) axial direction. The balancing force is opposite to the direction of gravity of the PTO mover component (4). When the enclosed shell (1) is subjected to wave impact, the PTO motor assembly (4) is driven to reciprocate along the PTO main shaft (5) to generate electricity. The gravity balance component (2) includes: a plurality of spring units (21) and a transmission unit (22) corresponding to each spring unit (21). The spring unit (21) includes a spring bracket (211) and a spring (212), and the transmission unit (22) includes a support rod (221), a gear (222) and a rack (223). The spring bracket (211) is fixed to the inner wall of the enclosed outer shell (1), and the spring (212) is disposed in the spring groove of the spring bracket (211); One end of the support rod (221) abuts against the PTO mover assembly (4), and the other end is fixedly connected to the gear (222) and rotates synchronously with the gear (222). One end of the rack (223) abuts against the spring (212). The gear (222) and the rack (223) mesh with each other and drive the rack (223) to reciprocate along the axial direction of the spring (212). The rack (223) compresses or stretches the spring (212) along the axial direction of the spring (212) when the spring is in a stretched state. When the PTO mover assembly (4) moves along the axial direction of the PTO main shaft (5), the balancing force is applied to the PTO mover assembly (4) in sequence through the rack (223), the gear (222) and the support rod (221). One end of the support rod (221) is fixedly connected to one side wall of the gear (222), and the other end slides against the bottom of the PTO moving part assembly (4); The rack (223) is slidably connected to the spring bracket (211) on the side away from the gear (222) and moves back and forth along the axial direction of the spring (212). The rack (223) is provided with straight teeth corresponding to the gear (222) on the side facing the gear (222). When the PTO mover assembly (4) moves back and forth along the PTO main shaft (5), it drives the gear (222) to rotate through the support rod (221). When the gear (222) rotates, it drives the rack (223) to slide back and forth along the spring (212).

2. The internal oscillation wave power generation device based on a gravity balance component according to claim 1, characterized in that, The side wall of the PTO moving part assembly (4) is provided with a limiting unit that corresponds one-to-one with the spring unit (21); The limiting unit includes a first limiting post (411) and a second limiting post (412) arranged along the axial direction of the PTO main shaft (5). The end of the support rod (221) near the PTO mover assembly (4) passes between the first limiting post (411) and the second limiting post (412). One side of the support rod (221) is slidably connected to the first limiting post (411), and the other side is rotatably connected to the second limiting post (412).

3. The internal oscillation wave power generation device based on a gravity balance component according to claim 1, characterized in that, The spring unit (21) includes: a coil spring (213); The transmission unit (22) includes: a connecting rope (224); The coil spring (213) is disposed at the top of the inner wall of the enclosed housing (1); One end of the connecting rope (224) is connected to the PTO mover assembly (4), and the other end is connected to the outer end of the corresponding coil spring (213); Several of the coil springs (213) apply a tension opposite to the gravity of the PTO mover assembly (4) along the PTO main shaft (5) axially via the corresponding connecting ropes (224).

4. The internal oscillation wave power generation device based on a gravity balance component according to claim 3, characterized in that, The connecting rope (224) includes: nylon rope or steel wire rope.

5. The internal oscillation wave power generation device based on a gravity balance component according to any one of claims 1-4, characterized in that, The PTO spindle (5) includes several transmission racks; The PTO mover assembly (4) includes a transmission gear that is actively connected to the transmission rack, and the transmission gear is also rotatably connected to the generator gear (6) in the PTO mover assembly (4); When waves impact the enclosed housing (1), the transmission rack on the PTO main shaft (5) moves back and forth in the vertical direction along with the enclosed housing (1), and drives the generator gear (6) to rotate and generate electricity through the transmission gear.

6. The internal oscillation wave power generation device based on a gravity balance component according to claim 5, characterized in that, The PTO spindle (5) includes a first transmission rack (51) and a second transmission rack (52); The PTO mover assembly (4) includes a first transmission gear (421) and a second transmission gear (422) meshing with the first transmission rack (51), and also includes a third transmission gear (423) and a fourth transmission gear (424) meshing with the second transmission rack (52). The generator gear (6) meshes with the first transmission gear (421) and the second transmission gear (422) respectively, or meshes with the third transmission gear (423) and the fourth transmission gear (424) respectively, wherein the first transmission gear (421) meshes with the third transmission gear (423) and the second transmission gear (422) meshes with the fourth transmission gear (424).

7. A wave power generation system, characterized in that, It includes several internal oscillation wave power generation devices based on gravity balance components as described in any one of claims 1-6.

8. The wave power generation system according to claim 7, characterized in that, Also includes: Housing fixing device; The outer shell fixing device is connected to each of the internal oscillating wave power generation devices by means of a catenary mooring.

Images