Wave energy power generation device and system

Abstract

The present invention discloses a wave energy power generation device and system. The wave energy power generation device includes: a pontoon, a coaxial shaft, a speed change gearbox, and a permanent magnet generator; the coaxial shaft is provided with a plurality of wave energy conversion components; the wave energy conversion components include: a one-way drive gear, a lever, a floating drum, and a limiting rod for defining the horizontal position of the floating drum and guiding the movement of the floating drum; the one-way drive gear is connected to the coaxial shaft; one end of the lever is connected to the one-way drive gear; the floating drum is rotatably connected to the other end of the lever; one end of the limiting rod is fixed to the pontoon; the other end of the lever and the floating drum are slidably connected to the limiting rod; a concave surface is formed at the bottom of the floating drum for contacting seawater. The wave energy power generation device and system have high power generation continuity and stability, and have a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to a wave energy power generation device and system. Background Art

[0002] Existing wave energy power generation devices mainly fall into two categories: one is the snake - type power generation device, and the other is the buoy vibration - type power generation device. The buoy vibration - type can be divided into shore - based fixed type, sea - based fixed type and sea - based floating type according to the installation area and whether it is fixed; and can be further divided into mechanical type, pneumatic type and hydraulic type (such as the eagle type) according to the energy conversion method. The several wave energy power generation devices listed above have the following major defects when combined: The main power generation equipment is exposed or immersed in seawater, resulting in the erosion of the main equipment by the salt in the sea breeze or seawater and the attachment of marine microorganisms; The snake - type and the sea - based buoy vibration - type affect maritime navigation and other marine operations such as fishing; The fixed buoy vibration - type lacks continuity and stability in power generation due to the tidal level difference; Through the energy conversion methods of air pressure or hydraulic pressure, the technology is complex and the investment cost is high; The energy absorption and conversion efficiency is low and the installed capacity is small. Summary of the Invention

[0003] The present invention provides a wave energy power generation device and system, adopting the following technical solutions:

[0004] A wave energy power generation device includes: a pontoon, a coaxial shaft, a speed - change gearbox driven by the coaxial shaft, and a permanent - magnet generator driven by the speed - change gearbox to convert mechanical energy into electrical energy; The permanent - magnet generator and the speed - change gearbox are installed on the pontoon; The output shaft of the speed - change gearbox is connected to the input shaft of the permanent - magnet generator; The input shaft of the speed - change gearbox is connected to the coaxial shaft; The coaxial shaft is rotatably connected to the pontoon; The coaxial shaft is provided with a plurality of wave energy conversion components for converting the potential energy of the wave into mechanical energy to drive the coaxial shaft to rotate relative to the pontoon; The wave energy conversion component includes: a one - way drive gear, a lever, a buoy, and a limiting rod for defining the horizontal position of the buoy and guiding the movement of the buoy; The one - way drive gear is connected to the coaxial shaft; One end of the lever is connected to the one - way drive gear; The buoy is rotatably connected to the other end of the lever; One end of the limiting rod is fixed to the pontoon; The other end of the lever and the buoy are slidably connected to the limiting rod; The bottom of the buoy for contacting seawater is formed with a concave surface.

[0005] Further, two clamping arms with rotating shafts are provided at the top of the buoy; Grooves for cooperating with the two rotating shafts are formed on both sides of the other end of the lever; The buoy is rotatably connected to the other end of the lever by rotating the two rotating shafts into the grooves; A rotating bearing is provided between the rotating shaft and the groove wall.

[0006] Further, the other end of the lever is slidably connected to the limiting rod through a kidney - shaped hole formed in the lever for the limiting rod to pass through; The buoy is slidably connected to the limiting rod through a through - hole formed in the buoy for the limiting rod to pass through.

[0007] Further, the limit rod is formed with a first-stage rod and a second-stage rod; the first-stage rod sequentially passes through the kidney-shaped hole and the through hole and is connected to one end of the second-stage rod and perpendicular to the second-stage rod; the other end of the second-stage rod is fixed to the side of the floating dock and is horizontally arranged.

[0008] Further, the upper part of the buoy is a cone.

[0009] Further, the input shaft of the permanent magnet generator and the output shaft of the speed change gearbox are connected by a belt pulley and a belt; the input shaft of the speed change gearbox and the coaxial shaft are connected by a belt pulley and a belt.

[0010] Further, the wave energy power generation device further includes: a pile foundation and a connecting arm arranged on the reef; both ends of the connecting arm are respectively rotatably connected to the pile foundation and the floating dock.

[0011] Further, a flywheel is provided at one end of the permanent magnet generator away from the input shaft of the permanent magnet generator.

[0012] A wave energy power generation system includes a plurality of wave energy power generation devices as described above; the plurality of wave energy power generation devices are connected to each other.

[0013] Further, the plurality of wave energy power generation devices are connected to each other by pedals connecting two adjacent floating docks.

[0014] The beneficial effect of the present invention is that the provided wave energy power generation device uses the floating dock as the power generation platform, and adopts a plurality of wave energy conversion components and a coaxial shaft to collect and convert the wave energy of the ocean. The structure is simple and the cost is low. At the same time, the concave surface provided at the bottom of the buoy can offset the inertia when the buoy moves to the wave crest or the wave trough, ensuring the effective working amplitude of the buoy; the rising and falling buoys can drive the coaxial shaft to rotate continuously through relevant components, and the flywheel connected to the rotating shaft of the permanent magnet generator further stabilizes the rotation speed, thereby ensuring the continuity and stability of power generation. Furthermore, it is not necessary to store energy through a storage battery, and it can be directly connected to the power grid only after power transmission and transformation, which is more environmentally friendly. Moreover, since a plurality of wave energy conversion components and a coaxial shaft can effectively collect and convert the wave energy of the ocean, the problem of too small installed capacity is also solved. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the floating dock of a wave energy power generation device of the present invention with the cabin removed;

[0016] Figure 2 is Figure 1 a schematic diagram of another perspective of the floating dock of the wave energy power generation device in

[0017] Figure 3 is Figure 1 a cross-sectional view of the buoy of the wave energy power generation device in

[0018] Figure 4 is Figure 1 A partial enlarged view of the wave energy conversion component of the wave energy power generation device in

[0019] Figure 5 is Figure 2 Another partial enlarged view of the wave energy conversion component of the wave energy power generation device in

[0020] Figure 6 A schematic diagram of the wave energy power generation system of the present invention.

[0021] Wave energy power generation device 10, barge 11, hull 111, cabin 112, coaxial shaft 12, bearing seat 13, speed change gearbox 14, permanent magnet generator 15, wave energy conversion component 16, one-way drive gear 161, lever 162, waist-shaped hole 1622, buoy 163, concave surface 1631, through hole 1632, clamping arm 1633, rotating shaft 1634, conical surface 1635, rotating bearing 164, limiting rod 165, first-stage rod 1651, second-stage rod 1652, belt 17, pulley 18, pile foundation 19, connecting arm 20, flywheel 21, limiting rod sleeve 22, wave energy power generation system 100, pedal 20. Detailed implementation manners

[0022] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0023] As Figures 1 to 5 shown, a wave energy power generation device 10 includes: a barge 11, a coaxial shaft 12, a speed change gearbox 14, and a permanent magnet generator 15. When the coaxial shaft 12 rotates, it drives the input shaft of the speed change gearbox 14 to rotate. The power input by the input shaft of the speed change gearbox 14 is output via the output shaft of the speed change gearbox 14 after being speed-changed by the speed change gears. The output shaft of the speed change gearbox 14 transmits the output power to the input shaft of the permanent magnet generator 15, and then the mechanical energy is converted into electrical energy through the permanent magnet generator 15.

[0024] The permanent magnet generator 15 and the speed change gearbox 14 are installed on the barge 11. Specifically, the barge 11 includes a cabin 112 and a hull 111. The permanent magnet generator 15 and the speed change gearbox 14 are installed on the hull 111 and are located inside the cabin 112. This can avoid the relevant equipment from being eroded by sea breeze, seawater and other substances. The output shaft of the speed change gearbox 14 is connected to the input shaft of the permanent magnet generator 15. The input shaft of the speed change gearbox 14 is connected to the coaxial shaft 12. The coaxial shaft 12 is rotatably connected to the hull 111 of the barge 11 through a bearing seat 13.

[0025] As a specific implementation, the input shaft of the permanent magnet generator 15 and the output shaft of the speed change gear box 14 are connected through a pulley 18 and a belt. The input shaft of the permanent magnet generator 15 and the output shaft of the speed change gear box 14 are both provided with pulleys 18, and the belt is sleeved on the outer periphery of the two pulleys 18 to transfer the mechanical energy possessed by the output shaft of the speed change gear box 14 when rotating to the input shaft of the permanent magnet generator 15. Similarly, the input shaft of the speed change gear box 14 and the coaxial shaft 12 are also connected through the pulley 18 and the belt. The input shaft of the speed change gear box 14 and the coaxial shaft 12 are both provided with pulleys 18, and the belt is sleeved on the outer periphery of the two pulleys 18 to transfer the mechanical energy possessed by the coaxial shaft 12 when rotating to the input shaft of the speed change gear box 14.

[0026] As a further solution, the coaxial 12 is provided with a plurality of wave energy conversion assemblies 16. The wave energy conversion assemblies 16 are used to convert the energy of the waves in the sea into mechanical energy to drive the coaxial 12 to rotate relative to the pontoon 11. The energy of the waves here refers to the potential energy of the seawater when it moves up and down.

[0027] Specifically, the wave energy conversion assembly 16 includes: a one-way transmission gear 161, a lever 162, a buoy 163 and a limiting rod 165. The limiting rod 165 is used to limit the horizontal position of the buoy 163 and guide the movement of the buoy 163. The one-way transmission gear 161 is connected to the coaxial shaft 12. One end of the lever 162 is connected to the one-way transmission gear 161. The buoy 163 is rotatably connected to the other end of the lever 162. One end of the limiting rod 165 is fixed to the pontoon 11. The other end of the lever 162 and the buoy 163 are slidably connected to the limiting rod 165. The bottom of the buoy 163 for contacting the seawater is formed with a concave surface 1631. The concave surface 1631 can be used to offset the upward inertia of the buoy 163 when it moves to the wave crest along the direction guided by the limiting rod 165, so as to prevent it from leaving the sea surface. At the same time, the concave surface 1631 can also increase the resistance of the seawater when the buoy 163 sinks to the trough along with the seawater, and reduce the inertia of the buoy 163 moving downward along the direction guided by the limit rod 165, thereby ensuring the stability of the movement of the buoy 163 in the direction guided by the limit rod 165. The above-mentioned crest refers to the crest of the wave formed by the seawater, and the trough refers to the trough of the wave formed by the seawater.

[0028] Specifically, the buoy 163 moves up and down under the action of the waves formed by seawater. When the buoy 163 moves upward following the waves, it drives the lever 162 to tilt upward. When the lever 162 tilts upward, it exerts an upward force on the one-way transmission gear 161, thereby driving the one-way transmission gear 161 to move counterclockwise. The counterclockwise rotation of the one-way transmission gear 161 can drive the coaxial shaft 12 to rotate counterclockwise. The coaxial shaft 12 drives the input shaft of the speed change gearbox 14 through the pulley 18 and the belt. The speed change gear pair provided inside the speed change gearbox 14 changes the speed of the rotation input by the input shaft and transmits it to the input shaft of the permanent magnet generator 15 through the output shaft of the speed change gearbox 14. The permanent magnet generator 15 converts the mechanical energy input by its input shaft into electric power through the permanent magnet and the coil and inputs the electric power into the power grid through power transmission and transformation. In this way, the energy of the seawater waves can be converted into electric energy. When the buoy 163 moves downward following the waves, the one-way transmission gear 161 will not act on the coaxial shaft 12.

[0029] Multiple buoys 163 are arranged on the sea surface, and at any moment, there are buoys 163 moving upward and downward following the waves. That is to say, at any moment, there are buoys 163 driving the lever 162 to tilt upward, thereby enabling the coaxial shaft 12 to rotate continuously. This can ensure the continuity and stability of power generation. When the buoy 163 moves upward to the wave crest, a large negative pressure is formed between the concave surface 1631 provided at the bottom of the buoy 163 and the seawater, which can prevent the buoy 163 from continuing to move upward due to inertia, thus avoiding the buoy 163 detaching from the sea surface. This enables each buoy 163 to maintain contact with the seawater, effectively and fully collect and convert the wave energy of the ocean, ensuring the power generation amount, solving the problem of too small installed capacity, and at the same time further ensuring the continuity and stability of power generation.

[0030] Specifically, the buoy 163 is made of a lightweight material and has a small mass to reduce the inertia when the buoy 163 moves. The concave surface 1631 is set as a dome-shaped concave surface, so that the bottom of the buoy 163 is integrally recessed inward, and thus a large negative pressure can be formed at the bottom of the buoy 163. When the buoy 163 floats up to the wave crest, there is still upward inertia. At this time, a negative pressure is formed between the seawater floating downward and the concave surface at the bottom of the buoy 163, offsetting part or all of the inertia; when the buoy 163 floats down to the wave trough, there is still downward inertia. At this time, the seawater floating upward forms a reverse resistance at the concave surface at the bottom of the buoy 163, offsetting part or all of the inertia. Such a structure can effectively prevent the buoy 163 from detaching from the sea level, and try to make the buoy 163 rise and fall (lift) synchronously with the waves to ensure the amplitude of the buoy.

[0031] Optionally, the concave surface can also be set as an annular concave surface distributed along the circumference of the bottom of the buoy. The concave surface can also be set as a flat-bottomed groove.

[0032] Furthermore, the limiting rod 165 guides the sliding of the other ends of the floating cylinder 163 and the lever 162 in the vertical direction, so that the potential energy of the waves can be fully and effectively converted into mechanical energy. At the same time, the limiting rod 165 can also limit the position of the floating cylinder 163 to prevent the floating cylinder 163 from undergoing horizontal displacement and swaying left and right under the action of the waves formed by the sea water, ensuring the stability of the structure.

[0033] In the above technical solution, the wave energy power generation device 10 uses the barge 11 as a power generation platform, and adopts a plurality of wave energy conversion components 16 and a coaxial shaft 12 to collect and convert the wave energy of the ocean. The structure is simple and the cost is low. At the same time, the concave surface 1631 provided at the bottom of the floating cylinder 163 can effectively prevent the floating cylinder 163 from detaching from the sea surface under the action of inertia. Such a structure enables the coaxial shaft 12 to rotate continuously, thereby ensuring the continuity and stability of power generation. Furthermore, it is not necessary to store energy through a storage battery, and it can be directly connected to the power grid only after power transmission and transformation, which is more environmentally friendly. Moreover, since a plurality of wave energy conversion components 16 and the coaxial shaft 12 can effectively collect and convert the wave energy of the ocean, the problem of too small installed capacity is also solved.

[0034] As a specific implementation manner, two clamping arms 1633 with a rotating shaft 1634 are provided at the top of the floating cylinder 163. Grooves 1621 are formed on both sides of the other end of the lever 162. The grooves 1621 are used to cooperate with the two rotating shafts 1634. The floating cylinder 163 is rotatably connected to the other end of the lever 162 by rotating the two rotating shafts 1634 into the grooves 1621. A rotating bearing 164 is provided between the rotating shaft 1634 and the groove wall of the groove 1621.

[0035] As a specific implementation manner, a waist-shaped hole 1622 is formed at the other end of the lever 162. The other end of the lever 162 is sleeved on the outer periphery of the limiting rod 165 through the waist-shaped hole 1622 and slidably connected to the limiting rod 165. Specifically, the waist-shaped hole 1622 extends along the extending direction of the lever 162, and the limiting rod 165 is located in the middle of the waist-shaped hole 1622 when the lever 162 is horizontal. This enables the other end of the lever 162 to tilt up or down under the action of the floating cylinder 163. A through hole 1632 is formed in the floating cylinder 163 along the direction of its center line. The floating cylinder 163 is sleeved on the outer periphery of the limiting rod 165 through the through hole 1632 and slidably connected to the limiting rod 165. A limiting rod sleeve 22 is also provided between the limiting rod 165 and the through hole 1632. The limiting rod sleeve 22 is sleeved on the outer periphery of the limiting rod 165 and connected to the inside of the through hole 1632, and can be used to protect between the limiting rod 165 and the hole wall of the through hole 1632, reducing the wear caused by friction to the two. The limiting rod sleeve 22 at least partially extends out of the bottom of the floating cylinder 163.

[0036] As a specific implementation manner, the limiting rod 165 is formed with a first-stage rod 1651 and a second-stage rod 1652. The first-stage rod 1651 sequentially passes through the kidney-shaped hole 1622 and the through hole 1632 and is connected to one end of the second-stage rod 1652 and is perpendicular to the second-stage rod 1652. The other end of the second-stage rod 1652 is fixed to the side surface of the pontoon 11 and is horizontally arranged. The first-stage rod 1651 in the structure extends in the vertical direction, and the second-stage rod 1652 extends in the horizontal direction, so that the buoy 163 can be always limited to move up and down in the vertical direction. At the same time, the structure in which the first-stage rod 1651 and the second-stage rod 1652 are perpendicular to each other has relatively high structural stability.

[0037] As a specific implementation manner, the upper part of the buoy 163 is a cone. When it rains or there are big waves, the rainwater or seawater that drenches the top of the buoy 163 will quickly slide down into the sea under the action of the conical surface 1635 at the top of the conical shape, so as to quickly eliminate the resistance generated by the rainwater or seawater when the buoy 163 moves up and down, and further ensure the stability of the buoy 163 following the waves up and down. This further ensures the effectiveness and sufficiency of energy conversion.

[0038] As a specific implementation manner, the wave energy power generation device 10 further includes: a pile foundation 19 arranged on the reef and a connecting arm 20. The two ends of the connecting arm 20 are respectively rotatably connected to the pile foundation 19 and the pontoon 11. Such a setting enables the pontoon 11 to rise or fall following the sea level when the sea water rises or falls, so as to ensure that multiple buoys 163 can always remain in contact with the sea water, and further ensure the continuity and stability of power generation.

[0039] As a specific implementation manner, a flywheel 21 is provided at one end of the permanent magnet generator 15 far from the input shaft of the permanent magnet generator 15. The flywheel 21 can further stabilize the rotation speed of the permanent magnet generator 15, that is, it can generate electricity stably and ensure the stability of the power generation amount.

[0040] As Figure 6 As shown, the present invention further provides a wave energy power generation system 100. The wave energy power generation system 100 includes a plurality of interconnected wave energy power generation devices 10, and wave energy power generation devices 10 can be added according to actual needs, so as to control the power generation amount of the entire wave energy power generation system 100.

[0041] Specifically, a plurality of wave energy power generation devices 10 are interconnected by a pedal 101 connecting two adjacent pontoons 11. The structure connected by the pedal 101 is stable, and it can also allow the staff to walk between two adjacent pontoons 11, which is convenient for repairing or inspecting each wave energy power generation device 10.

[0042] Since the floating docks 11 of two interconnected wave energy power generation devices 10 are not necessarily at the same horizontal level and are mostly at different heights due to the action of sea waves in most cases, one end of the pedal 101 connecting adjacent floating docks 11 is rotatably connected to one of the adjacent floating docks 11, while the other end of the pedal 101 is directly placed on the other of the adjacent floating docks 11, and the pedal 101 is designed in a "bow" shape.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

Claims

1. A wave energy power generation device, characterized in that, Comprising: A pontoon, a coaxial shaft, a speed-changing gearbox driven by the coaxial shaft, and a permanent magnet generator driven by the speed-changing gearbox to convert mechanical energy into electrical energy; the permanent magnet generator and the speed-changing gearbox are installed on the pontoon; the output shaft of the speed-changing gearbox is connected to the input shaft of the permanent magnet generator; the input shaft of the speed-changing gearbox is connected to the coaxial shaft; the coaxial shaft is rotatably connected to the pontoon; the coaxial shaft is provided with a plurality of wave energy conversion components for converting the potential energy of the waves into mechanical energy to drive the coaxial shaft to rotate relative to the pontoon; the wave energy conversion components include: a one-way transmission gear, a lever, a floating barrel, and a limiting rod for defining the horizontal position of the floating barrel and guiding the movement of the floating barrel; the one-way transmission gear is fixed to the coaxial shaft; the one-way transmission gear is connected to the coaxial shaft; one end of the lever is connected to the one-way transmission gear; the floating barrel is rotatably connected to the other end of the lever; one end of the limiting rod is fixed to the pontoon; the other end of the lever and the floating barrel are slidably connected to the limiting rod; the bottom of the floating barrel for contacting seawater is formed with a concave surface; Two clamping arms with rotating shafts are provided at the top of the floating barrel; grooves for cooperating with the two rotating shafts are formed on both sides of the other end of the lever; the floating barrel is rotatably connected to the other end of the lever by rotating the two rotating shafts into the grooves; a rotating bearing is provided between the rotating shaft and the groove wall of the groove; The other end of the lever is slidably connected to the limiting rod through a kidney-shaped hole formed in the lever for the limiting rod to pass through; the floating barrel is slidably connected to the limiting rod through a through hole formed in the floating barrel for the limiting rod to pass through; The kidney-shaped hole extends along the extending direction of the lever, and the limiting rod is located in the middle of the kidney-shaped hole when the lever is horizontal, so that the other end of the lever can be upturned or downturned under the action of the floating barrel; The limiting rod is formed with a first section rod and a second section rod; the first section rod sequentially passes through the kidney-shaped hole and the through hole and is connected to one end of the second section rod and is perpendicular to the second section rod; the other end of the second section rod is fixed to the side of the pontoon and is horizontally arranged; The upper part of the floating barrel is a cone.

2. The wave energy power generation device according to claim 1, wherein The input shaft of the permanent magnet generator and the output shaft of the speed-changing gearbox are connected by a belt pulley and a belt; the input shaft of the speed-changing gearbox and the coaxial shaft are connected by a belt pulley and a belt.

3. The wave energy power generation device according to claim 1, wherein The wave energy power generation device further includes: a pile foundation and a connecting arm arranged on the island reef; both ends of the connecting arm are respectively rotatably connected to the pile foundation and the pontoon.

4. The wave energy power generation device according to claim 1, wherein A flywheel is provided at one end of the permanent magnet generator away from the input shaft of the permanent magnet generator.

5. A wave energy power generation system, characterized in that, Including a plurality of wave energy power generation devices according to any one of claims 1 to 4; the plurality of wave energy power generation devices are connected to each other.

6. The wave energy power generation system according to claim 5, wherein a plurality of the wave energy power generation devices are connected to each other by pedals connecting two adjacent pontoons.

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