Combined power generation device

Abstract

The utility model discloses a combined power generation device, and relates to the technical field of wave energy utilization, the combined power generation device comprises a buoyancy tank assembly and a photovoltaic panel, the buoyancy tank assembly comprises a plurality of buoyancy tanks arranged side by side, and every two adjacent buoyancy tanks are rotatably connected through an intermediate shaft; a power generator is further arranged in the floating box, the input end of the power generator is connected with a transmission mechanism, the transmission mechanism comprises a connecting rod, a sliding rod and a gear set, one end of the connecting rod is rotationally connected with the middle shaft through a supporting plate, the other end of the connecting rod is rotationally connected with the sliding rod, a sliding sleeve is arranged on the side, close to the middle shaft, of the floating box, and the sliding rod penetrates through the sliding sleeve and is connected with a rack. The rack is in meshed connection with the gear set which is connected with the input end of the generator; when the buoyancy tank swings up and down around the middle shaft under the action of waves, the connecting rod can push the sliding rod to slide in the sliding sleeve in a reciprocating mode so as to drive the generator to generate electricity. According to the utility model, the complementary characteristic of solar energy and wave energy can be utilized, and the solar energy and the wave energy are mixed and utilized to obtain larger and more stable output power.

Description

Technical Field

[0001] The utility model relates to the technical field of wave energy utilization, in particular to a combined power generation device. Background Art

[0002] With the rapid growth of the world's population, human demand for energy is increasing. The current world energy structure is still dominated by non-renewable energy such as oil and natural gas. The reserves of non-renewable energy are rapidly decreasing, environmental pollution is becoming more and more serious, biodiversity is decreasing, various problems are coming one after another, and the energy crisis is imminent. Countries around the world urgently need to change their energy structure. Therefore, more and more countries are vigorously developing clean energy.

[0003] The ocean is a treasure trove of energy. It contains clean energy such as wave energy, tidal energy, current energy, solar energy, salinity energy, and temperature difference energy. Among them, wave energy has the characteristics of high energy density, high predictability, and strong periodicity compared to other marine clean energy. It is one of the main directions for the development of clean energy in the future. According to statistics, the theoretical value of ocean wave energy reserves worldwide is about 10 9 kW, far exceeding the total power generation in the world. In the northern Pacific and northern Atlantic, wave energy can reach 30-50kW·m -2 In the Indian Ocean and the southern Pacific Ocean, the wave energy can reach 50-90kW·m -2 The wave energy in most other sea areas is around 10kW·m -2 above.

[0004] Traditional clean energy power stations such as photovoltaic power stations and hydroelectric power stations are mostly located in the central and western parts of my country, far away from the developed eastern regions. Electricity needs to be transmitted from west to east, and the construction cost of long-distance transmission networks is high and there is a large loss of electricity. If wave energy is used to generate electricity along the eastern coast, it will solve the problems of high construction costs and high energy losses caused by long-distance transmission.

[0005] At present, wave energy power generation devices are mainly divided into the following categories: oscillating water column type, oscillating float type, overriding type, pendulum type, duck type and raft type; however, the above existing wave energy power generation devices are usually used alone, and the power generation capacity of a single wave energy power generation device is unstable, which has a great impact on the safety of the power grid.

[0006] Therefore, a combined power generation device is provided to solve the above problems existing in the prior art. Utility Model Content

[0007] The purpose of the utility model is to provide a combined power generation device to solve the problems existing in the above-mentioned prior art, and to utilize the complementary characteristics of solar energy and wave energy to mix solar energy and wave energy to obtain a larger and more stable output power.

[0008] To achieve the above object, the present utility model provides the following solution:

[0009] The present utility model provides a combined power generation device, including a floating box assembly and a photovoltaic panel. The photovoltaic panel is disposed on the floating box assembly. The floating box assembly includes a plurality of floating boxes arranged side by side, and adjacent two floating boxes are rotatably connected through a hinge mechanism. Wherein, the hinge mechanism includes an intermediate shaft, the intermediate shaft is horizontally disposed between adjacent two floating boxes, and both sides of the floating boxes are rotatably connected to the intermediate shaft and can swing up and down around the intermediate shaft.

[0010] A generator is further disposed in the floating box. The input end of the generator is connected with a transmission mechanism. The transmission mechanism includes a connecting rod, a sliding rod and a gear set. The projection of the connecting rod on the horizontal plane is perpendicular to the intermediate shaft. One end of the connecting rod is rotatably connected to the intermediate shaft through a support plate, and the other end is rotatably connected to the sliding rod. A sliding sleeve is further disposed on one side of the floating box close to the intermediate shaft. The sliding sleeve is horizontally disposed and perpendicular to the intermediate shaft. The end of the sliding rod far from the connecting rod passes through the sliding sleeve and extends into the floating box and is connected with a rack. The rack is meshed and connected with the gear set, and the gear set is connected with the input end of the generator. When the floating box swings up and down around the intermediate shaft under the action of waves, the connecting rod can push the sliding rod to reciprocate in the sliding sleeve to drive the generator to generate electricity.

[0011] Preferably, the support plate is vertically disposed on the intermediate shaft, and both sides of the support plate are respectively rotatably connected to the two connecting rods.

[0012] Preferably, the support plate is disposed in the middle of the intermediate shaft along the length direction of the intermediate shaft.

[0013] Preferably, a support frame is further disposed on one side of the floating box close to the intermediate shaft. The floating box is rotatably connected to the intermediate shaft through the support frame.

[0014] Preferably, two support frames are arranged side by side, and the support frames on adjacent two floating boxes are staggeredly arranged.

[0015] Preferably, the gear set includes a driving gear assembly and an output gear assembly. The rack is meshed and connected with the driving gear assembly. The driving gear assembly is in transmission connection with the output gear assembly. The output gear assembly is connected with the generator. The rack can drive the driving gear assembly to move, and further drive the generator to generate electricity through the output gear assembly.

[0016] Preferably, two sets of the driving gear assemblies are provided, and the two sets of the driving gear assemblies are respectively arranged on both sides of the output gear assembly and are both meshed and connected with the output gear assembly;

[0017] Among them, one set of the driving gear assemblies includes a first gear, a first ratchet wheel and a second gear. The first gear and the first ratchet wheel are connected by a first gear shaft, and the first ratchet wheel is connected to the inner ring of the second gear. When the first gear rotates in the first direction, it can drive the first ratchet wheel to rotate relative to the second gear. When the first gear rotates in the second direction, it can drive the second gear to rotate together through the first ratchet wheel, where the first direction is opposite to the second direction;

[0018] The other set of the driving gear assemblies includes a third gear, a second ratchet wheel and a fourth gear. The third gear and the second ratchet wheel are connected by a second gear shaft, and the second ratchet wheel is connected to the inner ring of the fourth gear. When the third gear rotates in the first direction, it can drive the second ratchet wheel to rotate relative to the fourth gear. When the third gear rotates in the second direction, it can drive the fourth gear to rotate together through the second ratchet wheel;

[0019] The output gear assembly includes a fifth gear. The second gear and the fourth gear are respectively arranged on both sides of the fifth gear and are meshed and connected with the fifth gear. The fifth gear can be in transmission connection with the input shaft of the generator to drive the input shaft of the generator to rotate;

[0020] Both the first gear and the third gear are meshed and connected with the rack, and the rack can drive the first gear and the third gear to rotate in opposite directions.

[0021] Preferably, the output gear assembly further includes a sixth gear, a seventh gear, an eighth gear and a ninth gear. The fifth gear and the sixth gear are connected by a third gear shaft. The seventh gear and the eighth gear are connected by a fourth gear shaft, and the seventh gear is meshed and connected with the sixth gear. The ninth gear is meshed and connected with the eighth gear, and the inner ring of the ninth gear is connected to the input shaft of the generator through a third ratchet wheel.

[0022] Preferably, a chute is formed in one end of the rack close to the gear set along its length direction. The rack is sleeved on the third gear shaft through the chute so that the rack can slide relative to the third gear shaft, and tooth teeth are arranged on both sides of the rack and are respectively meshed and connected with the first gear and the third gear.

[0023] Preferably, when both sides of the floating box are rotationally connected to the corresponding intermediate shaft through transmission mechanisms, the transmission mechanisms on both sides of the same floating box are connected to the same generator.

[0024] The utility model has achieved the following technical effects compared with the prior art:

[0025] In the utility model, two adjacent floating boxes are rotationally connected through an intermediate shaft, and a generator is further arranged inside the floating box. The intermediate shaft is connected to the generator through a connecting rod, a sliding rod and a gear set. When the floating box swings up and down around the intermediate shaft under the action of waves, the connecting rod can push the sliding rod to slide back and forth on the floating box, thereby driving the gear set to work, and finally driving the generator to generate electricity, realizing the utilization of wave energy. At the same time, a photovoltaic panel is also arranged on the floating box, and the photovoltaic panel can be used to generate electricity by using solar energy. The utility model can utilize the complementary characteristics of solar energy and wave energy, mix solar energy and wave energy for utilization to obtain a larger and more stable output power, and effectively solve the problems of unstable power generation of a single wave energy power generation device in the prior art and great influence on the safety of the power grid. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is the overall assembly drawing of a single power generation unit of the combined power generation device in the embodiment of the present utility model;

[0028] Figure 2 It is the connection schematic diagram of two adjacent floating boxes in the embodiment of the present utility model;

[0029] Figure 3 It is the structural schematic diagram of the fork-shaped double-sided rack in the embodiment of the present utility model;

[0030] Figure 4 It is the structural schematic diagram of the gear set in the embodiment of the present utility model;

[0031] Figure 5 It is the structural schematic diagram of the ratchet in the embodiment of the present utility model.

[0032] In the figure: 1 - floating box, 2 - hinge mechanism, 3 - photovoltaic panel, 4 - intermediate shaft, 5 - support plate, 6 - connecting rod, 7 - sliding rod, 8 - sliding sleeve, 9 - fork-shaped double-sided rack, 10 - first gear, 11 - first ratchet, 12 - second gear, 13 - third gear, 14 - second ratchet, 15 - fourth gear, 16 - fifth gear, 17 - sixth gear, 18 - seventh gear, 19 - eighth gear, 20 - ninth gear, 21 - third ratchet, 100 - gear set. Specific implementation mode

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0034] The purpose of the present invention is to provide a combined power generation device to solve the problems existing in the above-mentioned prior art, and can utilize the complementary characteristics of solar energy and wave energy to mix and utilize solar energy and wave energy to obtain a larger and more stable output power.

[0035] To make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation modes.

[0036] Embodiment 1

[0037] As Figures 1 - 5 shown, in this embodiment, a combined power generation device is provided, which mainly includes a floating box assembly and a photovoltaic panel 3. The floating box assembly includes a plurality of floating boxes 1 arranged side by side, and adjacent two floating boxes 1 are rotatably connected through a hinge mechanism 2; wherein, the hinge mechanism 2 includes an intermediate shaft 4, the intermediate shaft 4 is horizontally arranged between adjacent two floating boxes 1 and extends along the gap between adjacent two floating boxes 1, and both sides of the floating boxes 1 are rotatably connected to the intermediate shaft 4 and can swing up and down around the intermediate shaft 4;

[0038] A generator is also provided inside the floating box 1. The input end of the generator is connected to a transmission mechanism, which includes a connecting rod 6, a sliding rod 7, and a gear set 100. The projection of the connecting rod 6 on the horizontal plane is perpendicular to the intermediate shaft 4. One end of the connecting rod 6 is rotatably connected to the intermediate shaft 4 through a support plate 5, and the other end is rotatably connected to the sliding rod 7. A sliding sleeve 8 is also provided on one side of the floating box 1 close to the intermediate shaft 4. The sliding sleeve 8 is horizontally arranged and perpendicular to the intermediate shaft 4. The end of the sliding rod 7 away from the connecting rod 6 passes through the sliding sleeve 8 and extends into the floating box 1, and is connected to a rack. The rack is meshed with the gear set 100, and the gear set 100 is connected to the input end of the generator. When the floating box 1 swings up and down around the intermediate shaft 4 under the action of waves, the connecting rod 6 can push the sliding rod 7 to slide back and forth in the sliding sleeve 8 to drive the generator to generate electricity.

[0039] In this embodiment, the box body of the floating box 1 is made of a steel skeleton wrapped with composite material plates, and internal mechanical equipment such as generators and transmission mechanisms are fixed on the steel skeleton; and the photovoltaic panel 3 is inlaid on the top of the floating box 1, which can utilize solar energy to generate electricity and improve the overall stability.

[0040] This embodiment can utilize the complementary characteristics of solar energy and wave energy, mix and utilize solar energy and wave energy to obtain a larger and more stable output power, and effectively solve the problems of unstable power generation existing in the prior art using a single wave energy power generation device and having a greater impact on the safety of the power grid.

[0041] In this embodiment, the support plate 5 is vertically arranged on the intermediate shaft 4, and both sides of the support plate 5 are respectively rotatably connected to the two connecting rods; wherein, as a preferred embodiment, the support plate 5 is fixedly arranged in the middle of the intermediate shaft 4 along the length direction of the intermediate shaft 4 to improve stability.

[0042] In this embodiment, a support frame is also provided on one side of the floating box 1 close to the intermediate shaft 4. The floating box 1 is rotatably connected to the intermediate shaft 4 through the support frame; wherein, the support frame can be selected according to specific needs. For example, as Figure 1 and Figure 2 shown, the support frame can be a triangular support frame composed of a horizontal rod and an inclined rod. The pointed end of the triangular support frame is connected with a rotating block for rotatably connecting with the intermediate shaft 4.

[0043] In this embodiment, two support frames are arranged side by side, and the two support frames are respectively located on both sides of the surface of the floating box 1 close to the intermediate shaft 4 to improve stability; and the support frames on adjacent two floating boxes 1 are staggered to avoid mutual influence.

[0044] In this embodiment, the gear set 100 includes a driving gear assembly and an output gear assembly. The rack is meshed and connected with the driving gear assembly. The driving gear assembly is in transmission connection with the output gear assembly. The output gear assembly is connected with the generator. The rack can drive the driving gear assembly to move, and then drive the generator to generate electricity through the output gear assembly.

[0045] As a preferred embodiment, in this embodiment, as Figure 4 and Figure 5 shown, there are two sets of the driving gear assemblies, and the two sets of the driving gear assemblies are respectively arranged on both sides of the output gear assembly and are both meshed and connected with the output gear assembly;

[0046] Among them, one set of the driving gear assemblies includes a first gear 10, a first ratchet 11 and a second gear 12. The first gear 10 and the first ratchet 11 are connected by a first gear shaft, and the first ratchet 11 is connected to the inner ring of the second gear 12. When the first gear 10 rotates in the first direction, it can drive the first ratchet 11 to rotate relative to the second gear 12 in the first direction. When the first gear 10 rotates in the second direction, it can drive the second gear 12 to rotate together in the second direction through the first ratchet 11; among them, the first direction is opposite to the second direction, that is, one is the clockwise direction and the other is the counterclockwise direction. In this embodiment, it is preferably set that the first direction is the clockwise direction and the second direction is the counterclockwise direction;

[0047] The other set of the driving gear assemblies includes a third gear 13, a second ratchet 14 and a fourth gear 15. The third gear 13 and the second ratchet 14 are connected by a second gear shaft, and the second ratchet 14 is connected to the inner ring of the fourth gear 15. When the third gear 13 rotates clockwise, it can drive the second ratchet 14 to rotate relative to the fourth gear 15 clockwise. When the third gear 13 rotates counterclockwise, it can drive the fourth gear 15 to rotate together counterclockwise through the second ratchet 14;

[0048] The output gear assembly includes a fifth gear 16, a sixth gear 17, a seventh gear 18, an eighth gear 19, and a ninth gear 20. The fifth gear 16 and the sixth gear 17 are connected by a third gear shaft. The second gear 12 and the fourth gear 15 are respectively disposed on both sides of the fifth gear 16 and are meshed with the fifth gear 16. The seventh gear 18 and the eighth gear 19 are connected by a fourth gear shaft, and the seventh gear 18 is meshed with the sixth gear 17. The ninth gear 20 is meshed with the eighth gear 19, and the inner ring of the ninth gear 20 is connected to the input shaft of the generator through a third ratchet 21.

[0049] In this embodiment, both the first gear 10 and the third gear 13 are meshed with the rack. Wherein, a chute is formed along the length direction at one end of the rack close to the gear set 100. The rack is sleeved on the third gear shaft through the chute so that the rack can slide relative to the third gear shaft. Tooth teeth are provided on both sides of the rack to form a fork-shaped double-sided rack 9, as Figure 3 shown. The tooth teeth on both sides of the fork-shaped double-sided rack 9 are respectively meshed with the first gear 10 and the third gear 13. By sliding the fork-shaped double-sided rack 9, the first gear 10 and the third gear 13 can be driven to rotate in opposite directions.

[0050] Specifically, when the fork-shaped double-sided rack 9 makes a linear motion of the floating box 1, the fork-shaped double-sided rack 9 drives the first gear 10 to rotate clockwise. The first gear 10 and the first ratchet 11 rotate coaxially. The first ratchet 11 rotates clockwise. The first ratchet 11 slides relative to the inside of the second gear 12, does not provide power to the second gear 12, and does not affect the inherent rotation of the second gear 12. At the same time, the fork-shaped double-sided rack 9 drives the third gear 13 to rotate counterclockwise. The third gear 13 and the second ratchet 14 rotate coaxially. The second ratchet 14 also rotates counterclockwise. The second ratchet 14 drives the fourth gear 15 to rotate counterclockwise. The fourth gear 15 drives the fifth gear 16 to rotate clockwise. The second gear 12 is driven by the fifth gear 16 to rotate counterclockwise. The fifth gear 16 and the sixth gear 17 rotate coaxially. The sixth gear 17 rotates clockwise. The sixth gear 17 drives the seventh gear 18 to rotate counterclockwise. The seventh gear 18 and the eighth gear 19 rotate coaxially. The eighth gear 19 rotates counterclockwise. The eighth gear 19 drives the ninth gear 20 to rotate clockwise. The ninth gear 20 drives the input shaft of the generator to rotate and generate electricity by driving the third ratchet 21 inside it.

[0051] When the fork-shaped double-sided rack 9 moves into the floating box 1, the fork-shaped double-sided rack 9 drives the third gear 13 to rotate clockwise. The third gear 13 and the second ratchet wheel 14 rotate coaxially, and the second ratchet wheel 14 rotates clockwise. The second ratchet wheel 14 rotates relatively within the fourth gear 15, providing no power to the fourth gear 15 and not affecting the inherent movement of the fourth gear 15. At the same time, the fork-shaped double-sided rack 9 drives the first gear 10 to rotate counterclockwise. The first gear 10 and the first ratchet wheel 11 rotate coaxially, and the first ratchet wheel 11 rotates counterclockwise. The first ratchet wheel 11 drives the second gear 12 to rotate counterclockwise, and the second gear 12 drives the fifth gear 16 to rotate clockwise. The fifth gear 16 drives the fourth gear 15 to rotate counterclockwise, and the fourth gear 15 does not affect the inherent movements of the second ratchet wheel 14 and the fifth gear 16. The fifth gear 16 and the sixth gear 17 rotate coaxially clockwise, and the sixth gear 17 drives the seventh gear 18 to rotate counterclockwise. The seventh gear 18 and the eighth gear 19 rotate coaxially, and the eighth gear 19 rotates counterclockwise. The eighth gear 19 drives the ninth gear 20 to rotate clockwise, and the ninth gear 20 drives the input shaft of the generator to rotate and generate electricity by driving the third ratchet wheel 21 inside it.

[0052] In this embodiment, regardless of whether the connecting rod 6 moves into or out of the floating box 1, the gear set 100 can drive the input shaft of the generator to rotate in the same direction, thereby realizing power generation and improving the power generation efficiency.

[0053] In this embodiment, other rack structures can also be selected according to the working needs. For example, racks can be respectively connected to both sides of the end of the slide bar 7, and the first gear 10 and the third gear 13 are respectively driven by the two racks.

[0054] In this embodiment, as Figure 4 shown, the first gear 10 is located above the second gear 12, the third gear 13 is located above the fourth gear 15, the sixth gear 17 is located above the fifth gear 16, and the seventh gear 18 is located above the eighth gear 19, so that the gear output assembly and the gear drive assemblies on both sides are arranged vertically side by side and at a similar height, making the overall structure more compact. Among them, the eighth gear 19 and the ninth gear 20 are both preferably bevel gears, so that the ninth gear 20 can output power horizontally, and the input shaft of the generator can be horizontally arranged.

[0055] Furthermore, the diameter of the sixth gear 17 is larger than that of the fifth gear 16 and larger than that of the seventh gear 18. The diameter of the eighth gear 19 is larger than that of the seventh gear 18 and larger than that of the ninth gear 20, which can increase the rotational speed of the ninth gear 20 and further improve the power generation efficiency of the generator.

[0056] In this embodiment, the floating box 1 can be located at the middle position or the edge position of the floating box assembly. When it is located at the middle position, both sides of the floating box 1 are respectively connected to the corresponding intermediate shaft 4 through transmission mechanisms. The transmission mechanisms on both sides are symmetrically arranged along the plane and are connected to the same generator. Among them, the working mechanisms of the two groups of transmission mechanisms in the same floating box 1 are the same, and jointly drive the generator to rotate in the same direction. When the rotational speeds of the drive generator input shafts output by the gear sets 100 of the two groups of transmission mechanisms are not synchronized, the ninth gear 20 rotates relative to the third ratchet 21 inside it. The driving principles of the bilateral gear sets 100 are the same, so that the two groups of gear sets 100 will not restrain each other.

[0057] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. At the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A combined power generation device, characterized in that: It comprises a pontoon assembly and a photovoltaic panel, wherein the photovoltaic panel is arranged on the pontoon assembly, and the pontoon assembly comprises a plurality of pontoons arranged side by side, and two adjacent pontoons are rotatably connected via a hinge mechanism; wherein the hinge mechanism comprises an intermediate shaft, and the intermediate shaft is horizontally arranged between two adjacent pontoons, and the pontoons on both sides are rotatably connected to the intermediate shaft and can swing up and down around the intermediate shaft; A generator is also provided in the buoyancy box, and a transmission mechanism is connected to the input end of the generator. The transmission mechanism includes a connecting rod, a sliding rod and a gear set. The projection of the connecting rod on the horizontal plane is perpendicular to the intermediate shaft. One end of the connecting rod is rotatably connected to the intermediate shaft through a support plate, and the other end is rotatably connected to the sliding rod. A sliding sleeve is also provided on the side of the buoyancy box close to the intermediate shaft. The sliding sleeve is horizontally arranged and perpendicular to the intermediate shaft. One end of the sliding rod away from the connecting rod passes through the sliding sleeve and extends into the buoyancy box, and is connected to a rack. The rack is meshed with the gear set, and the gear set is connected to the input end of the generator. When the buoyancy box swings up and down around the intermediate shaft under the action of waves, the connecting rod can push the sliding rod to slide back and forth in the sliding sleeve to drive the generator to generate electricity.

2. The combined power generation device according to claim 1, characterized in that: The support plate is vertically arranged on the intermediate shaft, and two sides of the support plate are rotatably connected to the two connecting rods respectively.

3. The combined power generation device according to claim 2, characterized in that: The support plate is arranged at the middle part of the intermediate shaft along the length direction of the intermediate shaft.

4. The combined power generation device according to claim 1, characterized in that: A support frame is also provided on one side of the buoyancy box close to the intermediate shaft, and the buoyancy box is rotatably connected to the intermediate shaft through the support frame.

5. The combined power generation device according to claim 4, characterized in that: Two support frames are arranged side by side, and the support frames on two adjacent buoyancy boxes are arranged in a staggered manner.

6. The combined power generation device according to claim 1, characterized in that: The gear set includes a driving gear assembly and an output gear assembly, the rack is meshed with the driving gear assembly, the driving gear assembly is transmission-connected with the output gear assembly, the output gear assembly is connected to the generator, the rack can drive the driving gear assembly to move, and then drive the generator to generate electricity through the output gear assembly.

7. The combined power generation device according to claim 6, characterized in that: The driving gear assembly is provided with two groups, and the two groups of driving gear assemblies are respectively provided on both sides of the output gear assembly, and are both meshed and connected with the output gear assembly; Wherein, a group of the driving gear components includes a first gear, a first ratchet and a second gear, the first gear and the first ratchet are connected through a first gear shaft, and the first ratchet is connected to the inner ring of the second gear, when the first gear rotates in a first direction, the first ratchet can be driven to rotate relative to the second gear, when the first gear rotates in a second direction, the second gear can be driven to rotate together through the first ratchet, wherein the first direction is opposite to the second direction; Another group of the driving gear assembly includes a third gear, a second ratchet and a fourth gear, wherein the third gear and the second ratchet are connected via a second gear shaft, and the second ratchet is connected to the inner ring of the fourth gear, and when the third gear rotates in a first direction, the second ratchet can be driven to rotate relative to the fourth gear, and when the third gear rotates in a second direction, the fourth gear can be driven to rotate together via the second ratchet; The output gear assembly includes a fifth gear, the second gear and the fourth gear are respectively arranged on both sides of the fifth gear and meshed with the fifth gear, and the fifth gear can be drivingly connected to the input shaft of the generator to drive the input shaft of the generator to rotate; The first gear and the third gear are both meshed and connected with the rack, and the rack can drive the first gear and the third gear to rotate in opposite directions.

8. The combined power generation device according to claim 7, characterized in that: The output gear assembly also includes a sixth gear, a seventh gear, an eighth gear and a ninth gear, the fifth gear and the sixth gear are connected via a third gear shaft, the seventh gear and the eighth gear are connected via a fourth gear shaft, the seventh gear is meshed with the sixth gear, the ninth gear is meshed with the eighth gear, and the inner ring of the ninth gear is connected to the input shaft of the generator via a third ratchet.

9. The combined power generation device according to claim 8, characterized in that: A sliding groove is provided along the length direction of the rack at one end close to the gear set, and the rack is sleeved on the third gear shaft through the sliding groove so that the rack can slide relative to the third gear shaft, and teeth are provided on both sides of the rack, which are respectively meshed with the first gear and the third gear.

10. The combined power generation device according to claim 1, characterized in that: When both sides of the buoyancy box are rotationally connected to the corresponding intermediate shaft through the transmission mechanism, the transmission mechanisms on both sides of the same buoyancy box are connected to the same generator.

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