Wave power generation device

Abstract

This invention relates to the field of wave energy power generation technology, specifically to a wave energy power generation device. The wave energy power generation device includes: a main platform; a power generation unit, fixedly mounted on the main platform and having a receiving cavity, in which a power generation component is disposed; a secondary platform; and an energy capture unit, fixedly mounted on the secondary platform and having a liquid storage cavity, which is connected to the receiving cavity. This invention floats the power generation unit and energy capture unit on the sea surface. When the energy capture unit oscillates with the waves, circulating liquid in the storage cavity flows into the receiving cavity, driving the power generation component to generate electricity. Because the main circulating liquid is clean, the internal components of the device do not need to come into contact with seawater, effectively avoiding corrosion caused by seawater. The main working components of the device are all located above the sea surface and are not exposed to outdoor salt spray environments, effectively preventing the attachment of marine organisms. The device is simple and reliable overall, effectively solving the problem of frequent maintenance and high operating costs caused by existing wave energy power generation devices.

Description

Technical Field

[0001] This invention relates to the field of wave energy power generation technology, and specifically to a wave energy power generation device. Background Technology

[0002] Wave energy is the kinetic and potential energy of ocean surface waves. Wave energy generation devices are devices that capture wave energy and convert it into electrical energy. Due to the vast reserves of ocean wave energy resources and broad development prospects, wave energy generation devices have become a hot topic in ocean energy utilization research both domestically and internationally in recent years. Wave energy generation devices operate on various principles, mainly including oscillating body type, oscillating water column type, and wave-crossing type.

[0003] Currently, existing wave energy generation devices typically use seawater to drive a turbine. The turbine is directly submerged in the seawater, and a funnel-shaped converging ramp or slope creates a wave-gathering effect, directing waves into a high-level reservoir. The potential energy generated by the water level difference in the reservoir drives the turbine, which in turn drives a generator to produce electricity. This type of wave energy generation device requires long-term contact with seawater. Internal components are susceptible to corrosion and marine organism adhesion in the salt spray environment, and frequent maintenance leads to high operating costs. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high operation and maintenance costs caused by frequent maintenance of wave energy power generation devices in the prior art, thereby providing a wave energy power generation device.

[0005] To address the aforementioned problems, the present invention provides a wave energy generation device, comprising: a main platform adapted to float on the sea surface; a power generation unit fixedly mounted on the main platform and having a receiving cavity, wherein a power generation component is disposed in the receiving cavity, the power generation component being adapted to generate electricity under the gravity propulsion of a liquid; a secondary platform adapted to float on the sea surface and sway with the waves; and an energy capture unit fixedly mounted on the secondary platform and having a liquid storage cavity, the liquid storage cavity being connected to the receiving cavity, the energy capture unit being able to sway with the swaying of the secondary platform, so that the liquid in the liquid storage cavity flows into the receiving cavity.

[0006] Optionally, the liquid storage chamber includes multiple lifting chambers, with adjacent lifting chambers connected by several valve bodies. The valve bodies have a forward flow state that allows the liquid to pass smoothly and a reverse obstruction state that hinders the liquid from passing through. When the secondary platform oscillates with the waves, the liquid in the lower-level lifting chamber flows to the higher-level lifting chamber.

[0007] Optionally, the liquid storage chamber is provided with multiple first partitions and multiple second partitions, which are alternately arranged in the height direction of the liquid storage chamber. A gap is left between the first partition and the inner wall of one side of the lifting chamber, and a gap is left between the second partition and the inner wall of the other side of the lifting chamber. The valve body is arranged between adjacent first partitions and second partitions to form a multi-stage lifting chamber.

[0008] Optionally, the power generation unit is provided with a first liquid inlet and a first liquid outlet communicating with the receiving cavity. The height of the first liquid inlet is higher than the height of the first liquid outlet. The energy capture unit is provided with a second liquid inlet and a second liquid outlet communicating with the storage cavity. The first liquid inlet and the second liquid outlet, as well as the first liquid outlet and the second liquid inlet, are all connected by a liquid connecting pipe. Both ends of the liquid connecting pipe are provided with valve bodies.

[0009] Optionally, the liquid connecting pipe is connected to the receiving cavity via a maintenance valve, and / or the liquid connecting pipe is connected to the liquid storage cavity via a maintenance valve.

[0010] Optionally, the valve body is a Tesla valve.

[0011] Optionally, the receiving cavity includes an upper cavity, a middle cavity, and a lower cavity. The upper cavity is located above the lower cavity. The first liquid inlet is connected to the upper cavity, and the first liquid outlet is connected to the lower cavity. The power generation device is a hydro-generator installed in the middle cavity.

[0012] Optionally, the wave energy power generation device also includes a pressure regulating section installed on the power generation unit. The pressure regulating section is equipped with a filter structure and is connected to the outside through the filter structure. The pressure regulating section is suitable for balancing the pressure in the containment chamber with the external pressure.

[0013] Optionally, the wave energy generation device also includes a ventilation section, a multi-stage lifting chamber, and a receiving chamber connected through the ventilation section.

[0014] Optionally, the secondary platform is provided with swaying floats on both sides, the floats having a raised state that causes the secondary platform to swing significantly and a lowered state that reduces the swing amplitude of the secondary platform, and / or, the number of secondary platforms and energy capture units is multiple.

[0015] The present invention has the following advantages:

[0016] 1. The power generation unit and energy capture unit float on the sea surface. The interiors of the power generation unit and the energy capture unit are connected to form a closed circulation chamber. Clean circulating fluid can flow in the circulation chamber. When the energy capture unit sways with the waves, the circulating fluid in the storage chamber flows into the receiving chamber to drive the power generation unit to generate electricity. Then it flows back to the storage chamber and repeats the above steps to generate electricity. Because the main circulating liquid is clean, the internal components of the device do not need to come into contact with seawater, which can effectively avoid corrosion caused by seawater and reduce the failure rate. At the same time, the main working components of the device are all located above the sea surface and are not exposed to the outdoor salt spray environment, which can effectively prevent marine organisms from attaching. The device is simple and reliable as a whole, which effectively solves the problem of high operation and maintenance costs caused by frequent maintenance of existing wave energy power generation devices.

[0017] 2. The pressure regulating unit includes an airbag. The outer surface of the airbag is in contact with the air in the containment cavity, and its inner surface is in contact with the external environment through a filter structure. Since the wave energy power generation device needs to work on the sea surface for a long time, the temperature on the sea surface will not change suddenly, and the volume and state of the liquid inside the device will not change significantly. The air pressure inside and outside can be balanced by the inflation or contraction of the airbag. The internal environment of the device does not need to be directly connected to the outside world, which can ensure the balance of air pressure and make it more reliable and durable.

[0018] 3. The wave energy power generation device also includes a ventilation section. The multi-stage lifting chamber and the receiving chamber are connected through the ventilation section. Since the inside of the wave energy power generation device is a closed cavity, the ventilation section can keep the air pressure in each cavity consistent, effectively avoiding the generation of negative pressure air chambers in each cavity and affecting the liquid velocity.

[0019] 4. The float is connected to the secondary platform via a rotatable shaft. During normal operation, the float is raised, and its position does not affect the normal swing amplitude of the wave energy capture device. Once the swing amplitude exceeds the designed swing amplitude, the buoyancy of the float stabilizes the floating platform and prevents the secondary platform from tipping over. During maintenance, to reduce the swing amplitude of the secondary platform, the float is lowered to a lowered position, reducing its height and bringing it into contact with the water surface. The structure is simple and the operation is convenient.

[0020] 5. There are multiple sub-platforms and energy capture units. Multiple energy capture units are connected to the power generation unit in series and parallel to form a power generation array. The power generation power of the wave energy power generation device can be changed by increasing or decreasing the number of sub-platforms and energy capture units. The structure is simple and easy to adjust. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A three-dimensional schematic diagram of a wave energy power generation device according to an embodiment of the present invention is shown;

[0023] Figure 2 It shows Figure 1 A cross-sectional schematic diagram of a wave energy power generation device;

[0024] Figure 3 It shows Figure 2 A cross-sectional schematic diagram of the energy capture section of a wave energy power generation device;

[0025] Figure 4 It shows Figure 2 A cross-sectional schematic diagram of the power generation section of a wave energy power generation device;

[0026] Figure 5 It shows Figure 2 A schematic diagram of the energy capture section of a wave energy power generation device swinging to the left;

[0027] Figure 6 It shows Figure 2 A schematic diagram of the energy capture section of a wave energy power generation device swinging to the right;

[0028] Figure 7 It shows Figure 2 A cross-sectional schematic diagram of the valve body of a wave energy power generation device.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Main platform; 11. Anchor chain; 21. Receiving cavity; 211. Upper cavity; 212. Lower cavity; 22. First liquid inlet; 23. First liquid outlet; 24. Power generation component; 30. Secondary platform; 31. Floating component; 32. Rotating shaft; 40. Liquid storage cavity; 41. Lifting cavity; 42. Valve body; 43. First partition; 44. Second partition; 45. Second liquid inlet; 46. Second liquid outlet; 50. Liquid connecting pipe; 51. Inspection valve; 60. Pressure regulating section; 61. Filter structure; 71. Gas connecting pipe; 72. Sealing plate; 81. Flexible chain; 82. Lifting lug; 90. Sea surface. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figures 1 to 7 As shown, the wave energy generation device of this embodiment includes: a main platform 10, a power generation unit, a secondary platform 30, and an energy capture unit. The main platform 10 is adapted to float on the sea surface 90. The power generation unit is fixedly installed on the main platform 10 and has a receiving cavity 21. A power generation component 24 is installed in the receiving cavity 21. The power generation component 24 is adapted to generate electricity under the gravity of the liquid. The secondary platform 30 is adapted to float on the sea surface 90 and swing with the waves. The energy capture unit is fixedly installed on the secondary platform 30 and has a liquid storage cavity 40. The liquid storage cavity 40 is connected to the receiving cavity 21. The energy capture unit can swing with the swing of the secondary platform 30 so that the liquid in the liquid storage cavity 40 flows into the receiving cavity 21.

[0036] The wave energy power generation device of this embodiment floats the power generation unit and the energy capture unit on the sea surface 90. The interior of the power generation unit and the interior of the energy capture unit are connected to form a closed circulation cavity. Clean circulating fluid can flow in the circulation cavity. When the energy capture unit sways with the waves, the circulating fluid in the storage cavity 40 flows into the receiving cavity 21 to drive the power generation component 24 to generate electricity. Then it flows back to the storage cavity 40 and repeats the above steps to generate electricity. Since the main circulating liquid is clean circulating fluid, the internal components of the device do not need to come into contact with seawater, which can effectively avoid corrosion caused by seawater and reduce the failure rate. At the same time, the main working components of the device are all located above the sea surface 90 and are not exposed to the outdoor salt spray environment, which can effectively prevent marine organisms from attaching. The device is simple and reliable as a whole, which effectively solves the problem of high operation and maintenance costs caused by frequent maintenance of existing wave energy power generation devices.

[0037] Specifically, since the wave energy generation device in this embodiment floats on the sea surface 90, the main platform 10 is fixed to the seabed by anchor chains 11 to prevent the device from drifting away with the waves, thus achieving sea positioning. Since both the main platform 10 and the secondary platform 30 are independent floating platforms, and the main oscillating component is the energy harvesting unit, the main platform 10 and the secondary platform 30 are connected by a flexible chain 81. This allows the energy harvesting unit on the secondary platform 30 to oscillate relative to the power generation unit on the main platform 10 without detaching from the main platform 10. It can be understood that, as an alternative implementation, the main platform 10 and the secondary platform 30 can also be connected by rigid connectors such as connecting rods, allowing the main platform 10 and the secondary platform 30 to float as a whole on the sea surface 90, swaying with the waves.

[0038] Furthermore, in order to prevent collisions between the main platform 10 and the secondary platform 30, a collision buffer device can be installed on the side of the main platform 10 and the secondary platform 30 adjacent to each other to prevent the main platform 10 and the secondary platform 30 from being damaged by repeated collisions during long-term operation on the sea surface 90.

[0039] In this embodiment, the liquid storage chamber 40 includes multiple lifting chambers 41. Adjacent lifting chambers 41 are connected by several valve bodies 42. The valve bodies 42 have a forward flow state that allows the liquid to pass smoothly and a reverse obstruction state that hinders the liquid from passing through. When the secondary platform 30 swings with the waves, the liquid in the lower-level lifting chamber 41 flows to the higher-level lifting chamber 41. At this time, the liquid passes through the valve body 42 between the two lifting chambers 41 in the forward direction, and the valve body 42 hardly obstructs the passage of the liquid. When the higher-level lifting chamber 41 wants to flow back to the lower-level lifting chamber 41 with the swing, the liquid passes through the valve body 42 between the two lifting chambers 41 in the reverse direction, and the valve body 42 will obstruct the passage of the liquid at this time. When the liquid repeats the above steps and gradually flows to the higher-level lifting chamber 41, the wave energy is converted into the potential energy of the liquid in the lifting chamber 41. The structure is simple and ingenious, and it is not easy to fail.

[0040] Specifically, there are no restrictions on the specific type, quantity, and arrangement of the valve body 42. The valve body 42 can be a one-way valve or a reverse deceleration valve. Two adjacent lifting chambers 41 can be connected by one valve body 42 or by multiple valve bodies 42. The valve body 42 can be set horizontally or at an angle to the horizontal plane, and can be selected according to the actual application environment and application conditions.

[0041] Furthermore, there are no restrictions on the type of liquid in the device. It can be an oil with a low freezing point and good fluidity, or clean fresh water, as long as it can circulate to generate electricity and has no impact on the internal components.

[0042] Preferably, the liquid in the device is clean fresh water.

[0043] In this embodiment, the liquid storage chamber 40 is provided with multiple first partitions 43 and multiple second partitions 44, which are alternately arranged in the height direction of the liquid storage chamber 40. A gap is left between the first partition 43 and the inner wall of one side of the lifting chamber 41, and a gap is left between the second partition 44 and the inner wall of the other side of the lifting chamber 41. The valve body 42 is disposed between adjacent first partitions 43 and second partitions 44 to form a multi-stage lifting chamber 41. Both the first partitions 43 and second partitions 44 are fixed components. The multi-stage lifting chambers 41 are interconnected to form a zigzag passage. The liquid within can effectively elevate its position by swaying with the waves. The structure is simple and easy to manufacture. Here, "height direction" refers to... Figure 3 The direction indicated by the middle arrow is "up and down".

[0044] Specifically, such as Figure 3 As shown, the first partition 43 is located on the left side of the liquid storage chamber 40, and the second partition 44 is located on the right side of the liquid storage chamber 40. The multi-stage lifting chambers 41 are also alternately formed along the height direction. Two adjacent first partitions 43 and the second partition 44 between them form a lifting chamber 41, and two adjacent second partitions 44 and the first partition 43 between them also form a lifting chamber 41. It should be noted that the upper part of the topmost second partition 44 and the upper part of the bottommost second partition 44 are also lifting chambers 41. Here, "left side" refers to... Figure 3 The left side indicated by the middle arrow, the right side refers to... Figure 3 The side indicated by the middle arrow, the "right" side.

[0045] In this embodiment, the power generation unit is provided with a first liquid inlet 22 and a first liquid outlet 23 that communicate with the receiving cavity 21. The height of the first liquid inlet 22 is higher than the height of the first liquid outlet 23. The energy capture unit is provided with a second liquid inlet 45 and a second liquid outlet 46 that communicate with the storage cavity 40. The first liquid inlet 22 and the second liquid outlet 46, as well as the first liquid outlet 23 and the second liquid inlet 45, are all connected by a liquid connecting pipe 50. Both ends of the liquid connecting pipe 50 are provided with valve bodies 42. The liquid at the top of the storage cavity 40 flows into the receiving cavity 21 from the second liquid outlet 46 and the first liquid inlet 22 during the swing. The liquid flows downward under the action of gravity. When it flows through the power generation device 24, it drives the power generation device 24 to generate electricity. At this time, the potential energy of the liquid is converted into electrical energy through the power generation device 24. After passing through the power generation device 24, the liquid flows back into the storage cavity 40 from the first liquid outlet 23 and the second liquid inlet 45, thus completing the entire power generation process. It is understood that, as an alternative implementation, the liquid connecting pipe 50 may also have a valve body 42 installed at only one end.

[0046] Specifically, such as Figure 2 As shown, the direction of the second liquid outlet 46 toward the first liquid inlet 22 is the forward flow, and the opposite direction is the reverse flow. The direction of the first liquid outlet 23 toward the second liquid inlet 45 is the forward flow, and the opposite direction is the reverse flow. Through the multiple valve bodies 42 in the device, the liquid inside the entire device circulates counterclockwise during the repeated swaying process. The valve bodies 42 can restrict the flow direction of the liquid and prevent the liquid from flowing back in the liquid connecting pipe 50.

[0047] In this embodiment, the liquid connecting pipe 50 is connected to the receiving cavity 21 through the maintenance valve 51, and / or the liquid connecting pipe 50 is connected to the liquid storage cavity 40 through the maintenance valve 51. The maintenance valve 51 has an open state that allows liquid to pass through and a closed state that prevents liquid from passing through. The maintenance valve 51 plays an isolation role during maintenance. When the power generation unit or energy capture unit needs maintenance, the maintenance valve 51 is set to the closed state, so that the liquid connecting pipe 50 can be removed to perform maintenance on the component to be maintained separately. At this time, the liquid in the power generation unit or energy capture unit will not flow out during maintenance, making the subsequent maintenance process more convenient.

[0048] Specifically, in order to facilitate the maintenance of the energy capture unit, it is also equipped with lifting lugs 82 for easy hoisting during rest and maintenance.

[0049] In this embodiment, the valve body 42 is a Tesla valve. The Tesla valve has the characteristics of forward conduction and reverse obstruction. The flow direction of the liquid in the device is made to meet the design expectations through the Tesla valve. At the same time, the Tesla valve can achieve the above characteristics through its own structure, which has no moving parts. It is more durable and less prone to damage during the cyclic power generation process, further reducing the failure rate of the device.

[0050] Specifically, such as Figure 7 As shown, from left to right represents the forward flow through the Tesla valve, and from right to left represents the reverse flow. Here, left refers to... Figure 7 The direction of "left" in the middle, and "right" refers to... Figure 7 The direction of the "right" in the middle.

[0051] In this embodiment, the receiving cavity 21 includes an upper cavity 211, a middle cavity, and a lower cavity 212. The upper cavity 211 is located above the lower cavity 212. The first liquid inlet 22 is connected to the upper cavity 211, and the first liquid outlet 23 is connected to the lower cavity 212. The power generation device 24 is a water turbine generator installed in the middle cavity. After the liquid flows into the upper cavity 211, it passes through the middle cavity under the action of gravity and drives the water turbine generator therein to rotate and generate electricity. Then it flows into the lower cavity 212, converting the gravitational potential energy of the liquid into electrical energy. The power generation process is simple and reliable.

[0052] Specifically, since the head of the hydro-generator is not high, the generator 24 adopts a low-head hydro-generator. It can be understood that, as an alternative implementation, the generator 24 can also be a hydro-generator of other forms and structures. The method of utilizing the electricity generated by the hydro-generator is not limited. It can be fed to the onshore power grid through cable consolidation and voltage boosting, or it can be directly applied to a nearby hydrogen production unit for hydrogen production.

[0053] In this embodiment, the wave energy power generation device also includes a pressure regulating section 60 disposed on the power generation section. The pressure regulating section 60 is provided with a filter structure 61. The pressure regulating section 60 is connected to the outside through the filter structure 61. The pressure regulating section 60 is suitable for balancing the pressure in the receiving cavity 21 with the external pressure. The pressure regulating section 60 can balance the pressure in the receiving cavity 21 and the external ambient air pressure. The filter structure 61 can adsorb water and salt in the air during ventilation, thus extending the service life of the pressure regulating section 60.

[0054] Specifically, the pressure regulating unit 60 is located at the top of the upper cavity 211, a position where it is less likely to come into contact with seawater. The pressure regulating unit 60 includes an airbag with an internal air storage space. An opening communicating with the air storage space is provided on the airbag, and a filter structure 61 is located on the opening. The wall of the air storage space forms the inner surface of the airbag, and the outer wall of the airbag forms its outer surface. The outer surface of the airbag is in contact with the air in the receiving cavity 21, while its inner surface communicates with the external environment through the filter structure 61. When the air pressure in the receiving cavity 21 is equal to the air pressure in the air storage space, the airbag is in a normal tension state. When the air pressure in the receiving cavity 21 is higher, the airbag is compressed, and the air in the air storage space... Gas is discharged through the filter structure 61. When the air pressure in the containment chamber 21 is lower than the external atmospheric pressure, the external atmospheric pressure will force air through the filter structure 61 into the gas storage space, causing the airbag to inflate. Since the wave energy power generation device needs to operate on the sea surface 90 for extended periods, the temperature on the sea surface 90 will not change suddenly, and the volume and state of the liquid inside the device will not change significantly. The inflation or deflation of the airbag can balance the internal and external air pressures. The internal environment of the device does not need to be directly connected to the outside, ensuring pressure balance while being more reliable and durable. The filter structure 61 contains a desiccant and a filter layer, which adsorb water and salt when external air passes through it. It should be noted that if the internal environment of the device is connected to the outside through the filter structure 61, although the internal environment of the device will not be affected in the short term, the wave energy power generation device will be in the salt spray environment on the sea surface 90 for a long time, and the failure of the filter structure 61 is only a matter of time. Therefore, the airbag is needed to separate the two. It can be understood that the pressure regulating unit 60 can also be set in other positions on the power generation unit and the energy capture unit, and the specific position can be adjusted according to the operating environment.

[0055] In this embodiment, the wave energy power generation device also includes a ventilation section. The multi-stage lifting chamber 41 and the receiving chamber 21 are connected through the ventilation section. Since the inside of the wave energy power generation device is a sealed cavity, the ventilation section can keep the air pressure in each cavity consistent, effectively avoiding the generation of negative pressure air chambers in each cavity and affecting the liquid velocity.

[0056] Specifically, the ventilation section includes several gas connecting pipes 71. The multi-stage lifting chambers 41 are connected by rigid gas connecting pipes 71. Since the power generation section and the energy capture section will move relative to each other, the receiving chamber 21 and the lifting chamber 41 are connected by flexible gas connecting pipes 71. The gas connecting pipes 71 on the energy capture section and the lifting chambers 41 are also provided with connection ports for connecting with other devices. When the connection ports are not connected with other devices but are used for liquid or gas flow, they are sealed with a sealing plate 72.

[0057] In this embodiment, floating components 31 are oscillatingly mounted on both sides of the secondary platform 30. The floating components 31 have a raised state that allows the secondary platform 30 to swing significantly and a lowered state that reduces the swing amplitude of the secondary platform 30. The floating components 31 are connected to the secondary platform 30 through a rotatable shaft 32. During normal operation, the floating components 31 are raised. At this time, the position of the floating components 31 does not affect the normal swing amplitude of the wave energy capture device. Once the swing amplitude exceeds the designed swing amplitude, the buoyancy of the floating components 31 plays a role in stabilizing the floating platform and preventing the secondary platform 30 from tipping over. During maintenance, in order to reduce the swing amplitude of the secondary platform 30, the floating components 31 are lowered to the lowered state, reducing the height of the floating components 31 and bringing them into contact with the water surface. The structure is simple and the operation is convenient.

[0058] Specifically, the floating component 31 is preferably a buoy and is hinged to the secondary platform 30 via a pivot 32. A locking device is provided on the pivot 32. When adjusting the buoy, the locking device is unlocked, the buoy is rotated to the desired position, and the locking device is used to lock it to complete the adjustment process. The specific structure of the buoy is not limited. It can be an integral cylindrical shape, a hollow cylinder, or a multi-segment structure distributed along the axis. It can be selected according to the specific sea surface environment.

[0059] In this embodiment, there are multiple sub-platforms 30 and energy harvesting units, such as... Figure 1 As shown, multiple energy harvesting units are connected to the power generation unit in series and parallel to form a power generation array. The power output of the wave energy generation device can be changed by increasing or decreasing the number of sub-platforms 30 and energy harvesting units. The structure is simple and easy to adjust. It should be noted that the arrangement of the sub-platforms 30 and energy harvesting units is not limited to... Figure 1 In the form of the sub-platform 30 and the energy capture unit, they can also be arranged around the power generation unit or on several sides of the power generation unit.

[0060] Among them, such as Figure 1 As shown, the main platform 10 is a connected ship structure, which is more stable when floating on the sea surface 90 and is not easy to capsize; at the same time, the entire power generation array is always facing the direction of wave incident or propagation, so as to maximize the wave energy flux obtained by the energy capture unit.

[0061] Specifically, when multiple energy capture units are connected in series, the topmost lifting chambers 41 of two adjacent energy capture units are connected through a liquid connecting pipe 50, and the bottommost lifting chambers 41 of two adjacent energy capture units are connected through a liquid connecting pipe 50. At the same time, Tesla valves are also provided at both ends of the liquid connecting pipe 50 to ensure that the liquid in the multiple energy capture units can circulate. Furthermore, the gas connecting pipes 71 on two adjacent energy capture units are also connected through a pipeline to balance the gas pressure of each chamber.

[0062] The following describes how the wave energy generation device of this embodiment is used:

[0063] The wave energy generation device is transported to a designated sea area and secured by anchor chains 11 on the main platform 10. When the energy capture unit tilts to one side with the waves, the Tesla valve connecting the lower adjacent lift chamber 41 to the lift chamber 41 obstructs the flow of fresh water, while the Tesla valve connecting the higher adjacent lift chamber 41 is open. Therefore, the fresh water in the device can only flow to the higher adjacent lift chamber 41 through the Tesla valve. As the energy capture unit oscillates repeatedly with the waves, the fresh water in the storage chamber 40 gradually rises from the lowest lift chamber 41 to the highest lift chamber 41. At this time, the fresh water in the highest lift chamber 41 flows into the upper chamber 211 through the liquid connecting pipe 50. The fresh water in the upper chamber 211 flows through the middle chamber under the action of gravity, driving the turbine generator to generate electricity. After flowing into the lower chamber 212, it flows into the lowest lift chamber 41 through the liquid connecting pipe 50. The above process is repeated to generate electricity.

[0064] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0065] 1. The power generation unit and the energy capture unit float on the sea surface 90°. The interior of the power generation unit and the energy capture unit are connected to form a closed circulation cavity. Clean circulating fluid can flow in the circulation cavity. When the energy capture unit sways with the waves, the circulating fluid in the storage cavity 40 flows into the receiving cavity 21 to drive the power generation component 24 to generate electricity. Then it flows back to the storage cavity 40 and repeats the above steps to generate electricity. Since the main circulating liquid is clean circulating fluid, the internal components of the device do not need to come into contact with seawater, which can effectively avoid corrosion caused by seawater and reduce the failure rate. At the same time, the main working components in the device are all located above the sea surface 90° and will not be exposed to the outdoor salt spray environment, which can effectively prevent marine organisms from attaching. The device as a whole is simple and reliable.

[0066] 2. The liquid storage chamber 40 includes multiple lifting chambers 41. When the liquid gradually flows to the higher-level lifting chamber 41 with the swing, the wave energy is converted into the potential energy of the liquid in the lifting chamber 41. The structure is simple and ingenious and not prone to failure.

[0067] 3. The maintenance valve 51 serves as an isolation device during maintenance. When the power generation unit or energy capture unit needs maintenance, the maintenance valve 51 can be set to the closed state, and the liquid connecting pipe 50 can be removed to perform maintenance on the component to be maintained separately. At this time, the liquid in the power generation unit or energy capture unit will not flow out during maintenance, making the subsequent maintenance process more convenient.

[0068] 4. Valve body 42 is a Tesla valve. The Tesla valve has the characteristics of forward conduction and reverse obstruction. The Tesla valve makes the flow direction of the liquid in the device conform to the design expectation. At the same time, the Tesla valve can achieve the above characteristics through its own structure. There are no moving parts, which makes it more durable and less prone to damage during the cycle power generation process, further reducing the failure rate of the device.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A wave energy generation device, characterized in that, include: The main platform (10) is suitable for floating on the sea surface (90); The power generation unit is fixedly installed on the main platform (10) and has a receiving cavity (21). A power generation component (24) is provided in the receiving cavity (21). The power generation component (24) is adapted to generate electricity under the gravity of the liquid. The secondary platform (30) is adapted to float on the sea surface (90) and sway with the waves. The main platform (10) and the secondary platform (30) are connected by a flexible chain (81). An energy harvesting unit is fixedly mounted on the secondary platform (30) and has a liquid storage chamber (40). The liquid storage chamber (40) is connected to the receiving chamber (21). The energy harvesting unit can swing with the swing of the secondary platform (30) so that the liquid in the liquid storage chamber (40) flows into the receiving chamber (21). The liquid storage chamber (40) includes multiple lifting chambers (41). Two adjacent lifting chambers (41) are connected by several valve bodies (42). The valve bodies (42) have a forward passage state that allows the liquid to pass smoothly and a reverse obstruction state that obstructs the liquid from passing through. When the secondary platform (30) swings with the waves, the liquid in the lower-level lifting chamber (41) flows to the higher-level lifting chamber (41).

2. The wave energy generation device according to claim 1, characterized in that, The liquid storage chamber (40) is provided with a plurality of first partitions (43) and a plurality of second partitions (44). The plurality of first partitions (43) and the plurality of second partitions (44) are alternately arranged in the height direction of the liquid storage chamber (40). A gap is left between the first partition (43) and the inner wall of one side of the lifting chamber (41), and a gap is left between the second partition (44) and the inner wall of the other side of the lifting chamber (41). The valve body (42) is arranged between adjacent first partitions (43) and second partitions (44) to form a multi-stage lifting chamber (41).

3. The wave energy generation device according to claim 1, characterized in that, The power generation unit is provided with a first liquid inlet (22) and a first liquid outlet (23) communicating with the receiving cavity (21). The height of the first liquid inlet (22) is higher than the height of the first liquid outlet (23). The energy capture unit is provided with a second liquid inlet (45) and a second liquid outlet (46) communicating with the liquid storage cavity (40). The first liquid inlet (22) and the second liquid outlet (46) and the first liquid outlet (23) and the second liquid inlet (45) are all connected through a liquid connecting pipe (50). The valve body (42) is provided at both ends of the liquid connecting pipe (50).

4. The wave energy generation device according to claim 3, characterized in that, The liquid connecting pipe (50) is connected to the receiving cavity (21) through the maintenance valve (51), and / or the liquid connecting pipe (50) is connected to the liquid storage cavity (40) through the maintenance valve (51).

5. The wave energy generation device according to claim 3, characterized in that, The valve body (42) is a Tesla valve.

6. The wave energy generation device according to claim 5, characterized in that, The accommodating cavity (21) includes an upper cavity (211), a middle cavity, and a lower cavity (212). The upper cavity (211) is located above the lower cavity (212). The first liquid inlet (22) is connected to the upper cavity (211), and the first liquid outlet (23) is connected to the lower cavity (212). The power generation device (24) is a water turbine generator installed in the middle cavity.

7. The wave energy generation device according to any one of claims 1 to 4, characterized in that, The wave energy power generation device also includes a pressure regulating part (60) provided on the power generation part. The pressure regulating part (60) is provided with a filter structure (61). The pressure regulating part (60) is connected to the outside through the filter structure (61). The pressure regulating part (60) is adapted to balance the pressure in the receiving cavity (21) with the pressure in the outside.

8. The wave energy generation device according to any one of claims 1 to 4, characterized in that, The wave energy generation device also includes a ventilation section, through which the multi-stage lifting chamber (41) and the receiving chamber (21) are connected.

9. The wave energy generation device according to any one of claims 1 to 4, characterized in that, The secondary platform (30) is provided with swaying floating members (31) on both sides. The floating members (31) have a raised state that causes the secondary platform (30) to swing significantly and a lowered state that reduces the swing amplitude of the secondary platform (30), and / or, The number of the sub-platform (30) and the energy capture unit is multiple.

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