Rocker-type wave energy float motion posture self-control device

Abstract

The application discloses a rocking arm type wave energy floater motion posture self-control device and belongs to the technical field of wave energy power generation. One end of a rocking arm is hinged to a support platform and the other end is hinged to a wave energy floater and has a first hinge position, a moving connecting piece moves along the rocking arm, one end of a first piston cylinder is hinged to the moving connecting piece and the other end is statically connected to the wave energy floater, one end of a second piston cylinder is hinged to the moving connecting piece and the other end is statically connected to the wave energy floater, and the inner diameters of the cavities of the first and second piston cylinders are the same and are communicated. A valve is arranged at the communication position of the cavities of the first and second piston cylinders, a gravity pendulum is hinged to the wave energy floater and connected to the valve, and the gravity pendulum controls the opening and closing of the valve through swinging. When the wave energy floater is deflected, the gravity pendulum deviates from the balance position and pushes the valve connected thereto to close the valve, thereby blocking the exchange of hydraulic oil in the two piston cylinders and preventing the wave energy floater from being deflected.

Description

Technical Field

[0001] This invention relates to an automatic control device for the motion attitude of a rocker-arm type wave energy buoy, belonging to the field of wave energy power generation technology. Background Technology

[0002] Energy is a vital material foundation for human life and social progress. The development of industrial technology has significantly increased global energy demand, making the development of renewable energy a crucial measure for addressing energy issues. Ocean energy is an important renewable energy source, and wave energy is a type of ocean energy. Wave energy has vast reserves, is easily accessible, and is clean and pollution-free, gradually becoming a key focus of renewable energy development and utilization.

[0003] Wave energy generation devices are mainly classified into three types based on their technical principles: oscillating water column type, wave-overtaking type, and oscillating body type. Among these, compared with other types of wave energy generation devices, the oscillating body type has a flexible structure, low construction cost, and high reliability. Meanwhile, the oscillating float type wave energy generation device, which combines a rocker arm with a wave energy float, is flexible in its application and can be deployed independently or integrated with marine engineering projects such as breakwaters and offshore platforms. Therefore, it has received widespread attention and research.

[0004] Currently, the connection methods between the wave energy buoy and the rocker arm in rocker-arm wave energy power generation devices can be divided into simple hinged connection and fixed connection. While a fixed connection prevents relative rotation between the buoy and the rocker arm, ensuring the efficiency of the rotation shaft at the hinge, the fixed connection allows the buoy to tilt during movement. This increases the likelihood of seawater submerging the top of the buoy and hindering its normal movement. Overall, the obstructed buoy movement reduces the overall power generation efficiency of the device. Furthermore, tilting of the buoy generates significant stress at the fixed connection with the rocker arm, jeopardizing the device's safety. In contrast, a simple hinged connection allows for significant relative movement between the buoy and the rocker arm under wave action. This not only consumes more wave energy but also, in extreme sea conditions, can cause the buoy to rotate at large angles and fail to return to its original position. This significantly impacts the overall power generation efficiency of the wave energy utilization device. Summary of the Invention

[0005] The purpose of this invention is to overcome the aforementioned shortcomings of the prior art and provide an automatic control device for the motion attitude of a rocker-arm type wave energy buoy. When the wave energy buoy is in motion, the automatic control device self-adjusts to suppress the rotation of the buoy relative to the rocker arm, thereby improving the utilization rate of wave energy and reducing the possibility of seawater overflowing the top of the buoy, thus improving power generation efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The rocker arm type wave energy float motion attitude self-control device includes: support platform, rocker arm, moving connector, first piston cylinder, second piston cylinder, valve and gravity pendulum; The rocker arm has one end hinged to the support platform and the other end hinged to the wave energy float, having a first hinged position. A movable connector is movably connected to the rocker arm and moves along the rocker arm; The first piston cylinder has a first end and a second end; the first end is hinged to the movable connector, the second end is located above the first hinge position and is statically connected to the wave energy float, and the first end is lower than the second end; The second piston cylinder has a third end and a fourth end; the third end is hinged to the movable connector, and the fourth end is statically connected to the wave energy float; the third end and the fourth end are located on the downward extension line of the first piston cylinder; the cavity of the second piston cylinder has the same inner diameter as the cavity of the first piston cylinder and is connected to it. A valve is disposed at the communication point between the cavity of the second piston cylinder and the cavity of the first piston cylinder; and, A gravity pendulum, hinged to a wave energy float, hangs naturally, and its side is connected to the valve; the gravity pendulum controls the opening and closing of the valve by its swing.

[0007] The rocker arm type wave energy float motion attitude self-control device may further include an arc-shaped guide rail; the arc-shaped guide rail is in the shape of an arc, with the hinge position of the first end and the movable connector as the center; the two ends of the arc-shaped guide rail are statically connected to the movable connector, and the third end is hinged to the arc-shaped guide rail and moves along the arc-shaped guide rail.

[0008] The rocker arm type wave energy float motion attitude self-control device may further include a connecting oil pipe; the connecting oil pipe connects the cavity of the second piston cylinder and the cavity of the first piston cylinder; the valve is disposed on the connecting oil pipe.

[0009] The piston rod end of the first piston cylinder is the first end.

[0010] The piston rod end of the second piston cylinder is the third end.

[0011] The gravity pendulum includes a first gravity pendulum and a second gravity pendulum; the valve includes a first valve and a second valve; the first gravity pendulum controls the first valve, and the second gravity pendulum controls the second valve.

[0012] The valve is a spring valve, which includes a movable valve core. The movable valve core is connected to the side of the gravity pendulum and opens and closes the spring valve under the action of the gravity pendulum.

[0013] The movable connector is a slider; the slider is slidably connected to the rocker arm and slides along the rocker arm.

[0014] The beneficial effects of this invention are: The hinge point between the wave energy float and the rocker arm, and the fixed point connecting the two piston cylinders, form a triangle with a fixed side length, allowing the wave energy float to rotate around the rocker arm. To prevent excessive free rotation of the wave energy float and the resulting energy consumption, two valves controlled by a gravity pendulum are added. The gravity pendulum is hinged to the vertical section of the wave energy float, and the spring valve is installed on the vertical section connecting the oil pipe. When the wave energy float maintains a horizontal posture, the valve remains open under the action of the spring force, ensuring that the hydraulic oil in the two piston cylinders can be exchanged. When the wave energy float deflects clockwise or counterclockwise, the gravity pendulum deviates from its equilibrium position. Under the action of gravity, the gravity pendulum pushes the valve core of the valve connected to it to close the valve, thereby blocking the exchange of hydraulic oil in the two piston cylinders. The wave energy float can no longer deflect around the rocker arm and will deflect further until the wave energy float follows the rocker arm and returns to a horizontal posture. Therefore, the system can automatically control the motion attitude of the wave energy buoy by using the gravity of the components as the driving force, thereby improving the energy capture efficiency of the energy harvesting body composed of the rocker arm and the wave energy buoy.

[0015] (1) Compared with the fixed connection between the wave energy float and the rocker arm, the rocker arm wave energy float motion attitude self-control system of the present invention avoids the phenomenon of the device float tilting when the device float is fixedly connected to the rocker arm, keeps the float in a horizontal position, reduces the possibility of seawater overflowing the top of the device float, and reduces the resistance effect of waves on the float.

[0016] (2) Compared with the fixed connection between the wave energy float and the rocker arm, the float motion attitude control system of the present invention avoids the wave energy float from tilting, and the float and the rocker arm are kept in a hinged connection, which greatly reduces the stress at the connection and improves the safety of the structure.

[0017] (3) Compared with the simple hinge of wave energy float and rocker arm, the float motion attitude self-control system of the present invention can automatically control the rotation of the device float relative to the rocker arm, suppress the uncertain rotation between the float and the rocker arm, and avoid the phenomenon that the float only moves but does not generate electricity.

[0018] (4) Compared with the simple hinge of wave energy float and rocker arm, the float motion attitude self-control system of the present invention can keep the float in a horizontal attitude, keep the hydrodynamic performance of the wave energy power generation device in a stable state, and ensure the power generation efficiency of the device.

[0019] (5) The float motion attitude control system of the present invention can automatically control the motion attitude of the float by relying only on the gravity of the gravity pendulum. It does not require additional control elements and energy input, has a simple structure and is not easily damaged.

[0020] (6) The components of the float motion attitude self-control system of the present invention are arranged in a triangular pattern, which utilizes the stability of the triangular structure and improves the reliability of the device.

[0021] (7) The float motion attitude self-control system of the present invention is ingeniously designed with an arc-shaped hinge support to ensure the degree of freedom required for the motion of the self-control system itself. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the rocker arm type wave energy float motion attitude self-control device disclosed in a specific embodiment of the present invention; Figure 2 This is another structural schematic diagram of the rocker arm type wave energy buoy motion attitude self-control device disclosed in a specific embodiment of the present invention. Figure 3 This is a partial schematic diagram of the rocker arm type wave energy float motion attitude self-control device disclosed in a specific embodiment of the present invention; Among them, 1. support platform, 2. rocker arm, 3. wave energy float, 4. first piston cylinder, 5. piston rod of the first piston cylinder, 6. slider, 7. piston rod of the second piston cylinder, 8. second piston cylinder, 9. connecting oil pipe, 10. first gravity pendulum, 11. first elastic valve, 12. second gravity pendulum, 13. second elastic valve, 14. arc-shaped guide rail, 15. first movable valve core, 16. second movable valve core. Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0025] A rocker arm type wave energy float motion attitude self-control device includes: a support platform 1, a rocker arm 2, a movable connector, a first piston cylinder 4, a second piston cylinder 8, a valve and a gravity pendulum; One end A of the rocker arm 2 is hinged to the support platform 1, and the other end of the rocker arm 2 is hinged to the wave energy float 3. The wave energy float 3 vibrates under wave excitation, driving the rocker arm 2 to rotate around the hinge point between the rocker arm 2 and the support platform 1, which can drive the energy conversion system connected to the other end of the rocker arm 2 to generate electricity using wave energy.

[0026] Support platform 1 can be a fixed platform or a floating platform. Rocker arm 2 can be hinged to any position on support platform 1; the specific position can be determined according to the actual situation. Rocker arm 2 can be a straight arm as shown in the figure, or more specifically, a slender rod.

[0027] The rocker arm 2 can be hinged to any position on the wave energy float 3. Specifically, it can be hinged to the center of the upper surface of the wave energy float 3, that is, the hinge point B between the rocker arm 2 and the wave energy float 3 is located as follows: Figure 1 The location shown.

[0028] A guide rail can be set along the length of the rocker arm 2, specifically between points A and B of the rocker arm 2. Alternatively, the guide rail can be used as the rocker arm 2. A movable connector is provided on the guide rail, which is movably connected to the guide rail and moves along it. Specifically, the movable connector and the guide rail can be slidably connected, with the movable connector sliding along the guide rail. The movable connector can be a slider 6, and the guide rail can be a slide rail, with the slider 6 slidably connected to the slide rail and sliding along it.

[0029] Two fixed positions, C and D, are set on the wave energy float 3. Fixed position C can be located directly above the junction point B, and fixed position D can be located at the edge of the wave energy float 3 and directly below the rocker arm 2. Fixed position C is higher than fixed position D. Fixed position C can be achieved by setting a vertical support on the wave energy float 3. Fixed position C is statically connected to one end of the first piston cylinder 4, and fixed position D is statically connected to one end of the second piston cylinder 8. The static connection between the first piston cylinder 4 and fixed position C can be a fixed connection, and the static connection between the second piston cylinder 8 and fixed position D can also be a fixed connection. The other end of the first piston cylinder 4 is hinged to the movable connecting member, and the other end of the second piston cylinder 8 is hinged to the movable connecting member. The first piston cylinder 4 and the second piston cylinder 8 can be hinged opposite each other to the movable connecting member, with their length directions along the same straight line. Specifically, the piston rod 5 end of the first piston cylinder can be hinged to the movable connecting member, and the piston rod 7 end of the second piston cylinder can be hinged to the movable connecting member. When the movable connector is slider 6, the piston rod 5 of the first piston cylinder is hinged to the upper side of slider 6, and the piston rod 7 of the second piston cylinder is hinged to the lower side of slider 6.

[0030] The inner diameter of the cavity of the first piston cylinder 4 is the same as that of the cavity of the second piston cylinder 8, and the cavities of the first piston cylinder 4 and the second piston cylinder 8 are connected. When the hydraulic oil between the first piston cylinder 4 and the second piston cylinder 8 is exchanged, the stroke of the piston rod 5 of the first piston cylinder and the piston rod 7 of the second piston cylinder are the same. Specifically, the cavities of the first piston cylinder 4 and the second piston cylinder 8 can be connected by a connecting oil pipe. One end of the connecting oil pipe is located at one end of the first piston cylinder 4, connecting to the cavity of the first piston cylinder 4, and the other end of the connecting oil pipe is located at one end of the second piston cylinder 8, connecting to the cavity of the second piston cylinder 8.

[0031] An arc-shaped guide rail 14 is provided on the lower side of the movable connector. Both ends of the arc-shaped guide rail 14 are connected to the movable connector. The arc-shaped guide rail 14 is centered on the hinge position E between the piston rod 5 of the first piston cylinder and the movable connector. Specifically, the arc-shaped guide rail 14 can be a circular arc-shaped guide rail, with the center of the circular arc-shaped guide rail 14 being the hinge position E between the piston rod 5 of the first piston cylinder and the movable connector. The other end of the second piston cylinder 8 is hinged to the arc-shaped guide rail 14, and the other end of the second piston cylinder 8 can move along the arc-shaped guide rail 14. That is, the arc-shaped guide rail 14 serves as the hinge support between the other end of the second piston cylinder 8 and the movable connector. The presence of the arc-shaped guide rail 14 ensures that when the movable connector moves along the rocker arm 2, the piston rod 5 of the first piston cylinder and the piston rod 7 of the second piston cylinder remain on the same straight line, and the distance between the hinge points remains unchanged. Thus, the wave energy float 3 can rotate around the rocker arm 2 and... A triangle with fixed side lengths.

[0032] If the rotation of the wave energy float 3 is not restricted, it may undergo uncertain rotation under wave excitation, and may even fail to return to its initial equilibrium position after a large-angle deflection. Therefore, a gravity pendulum and a valve controlled by the gravity pendulum are introduced. The valve is located at the connection between the cavity of the second piston cylinder 8 and the cavity of the first piston cylinder 4. When the valve is open, the cavities of the second piston cylinder 8 and the first piston cylinder 4 are connected, allowing the exchange of hydraulic oil between them. The piston rods 7 and 5 of the second and first piston cylinders can move along the rocker arm 2, thus keeping the wave energy float 3 in a horizontal oscillation position under wave excitation. When the valve is closed, the cavities of the second and first piston cylinders are disconnected, preventing the exchange of hydraulic oil between them. The piston rods 7 and 5 of the second and first piston cylinders cannot move along the rocker arm 2, thus preventing further deflection of the wave energy float 3.

[0033] A gravity pendulum, hinged to wave energy float 3, hangs naturally, its side connected to a valve; the gravity pendulum controls the opening and closing of the valve through its swing. Specifically, the gravity pendulum is hinged between B and C, swinging left and right with the movement of wave energy float 3. When the gravity pendulum swings left and right, it pulls and pushes the valve core, thereby opening or closing the valve. Specifically, the gravity pendulum includes a first gravity pendulum 10 and a second gravity pendulum 12; the valve includes a first valve and a second valve; the first gravity pendulum 10 controls the first valve, and the second gravity pendulum 12 controls the second valve. The first gravity pendulum 10 can be located directly above the second gravity pendulum 12, and the first valve can be located directly above the second valve.

[0034] The valve can be a spring valve. A spring valve includes a movable valve core; the movable valve core is connected to the side of a gravity pendulum, and the movable valve core moves within the spring valve cavity under the drive of the gravity pendulum, thereby opening and closing the spring valve. Example

[0035] A rocker arm type wave energy float motion attitude self-control device, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes: a support platform 1, a linear rocker arm 2, a slider 6, a first piston cylinder 4, a second piston cylinder 8, a connecting oil pipe 9, a first spring valve 11, a second spring valve 13, a first gravity pendulum 10, and a second gravity pendulum 12; End point A of rocker arm 2 is hinged to support platform 1, and the other end of rocker arm 2 is hinged to the center of the upper surface of wave energy float 3, with the hinge point being point B. Wave energy float 3 vibrates under wave excitation, driving rocker arm 2 to rotate around support platform 1, which can drive the energy conversion system at the rear end to generate electricity using wave energy.

[0036] A slider 6 is slidably connected to the rocker arm 2, and the slider 6 slides along the rocker arm 2.

[0037] A vertical mounting bracket is installed at the center of the upper surface of the wave energy float 3, with the top of the mounting bracket being the fixing point C. The fixing point D is located directly below the rocker arm 2, at the edge of the upper surface of the wave energy float 3.

[0038] The first piston cylinder 4 and the second piston cylinder 8 have the same structure and dimensions. The cylinder body end of the first piston cylinder 4 is fixedly connected to fixed point C, and the cylinder body end of the second piston cylinder 8 is fixedly connected to fixed point D. The piston rod 5 of the first piston cylinder is hinged to the upper side of the slider 6, with the hinge point being point E. An arc-shaped guide rail 14 is set with the hinge point E as the center, and both ends of the arc-shaped guide rail 14 are connected to the lower side of the slider 6. The piston rod 7 of the second piston cylinder is hinged to the arc-shaped guide rail 14, and the hinge position moves along the arc-shaped guide rail 14. The arc-shaped guide rail 14 serves as the hinge support between the piston rod 7 of the second piston cylinder and the slider 6. The length directions of the first piston cylinder 4 and the second piston cylinder 8 are on the same straight line.

[0039] The first piston cylinder 4 and the second piston cylinder 8 are connected to the cavity via a connecting oil pipe 9. When the hydraulic oil between the first piston cylinder 4 and the second piston cylinder 8 is exchanged, the piston rod 5 of the first piston cylinder and the piston rod 7 of the second piston cylinder have the same stroke. At this point, the wave energy float 3 can rotate around the rocker arm 2 and... A triangle with fixed side lengths.

[0040] The first gravity pendulum 10 and the second gravity pendulum 12 are hinged to the mounting bracket of the wave energy float 3. The first spring valve 11 and the second spring valve 13 are installed in the vertical section of the connecting oil pipe 9. When the wave energy float 3 is kept in a horizontal position, the first spring valve 11 and the second spring valve 13 remain open under the action of spring force, so that the hydraulic oil in the first piston cylinder 4 and the second piston cylinder 8 can continue to exchange, so that the wave energy float 3 can maintain a horizontal oscillation under wave excitation.

[0041] When the wave energy float 3 rotates at a large angle and deflects counterclockwise under the impact of waves, the first gravity pendulum 10 will deviate from the equilibrium position under the action of gravity and pull the first movable valve core 15 of the first elastic valve 11 to the left, thereby closing the first elastic valve 11 and blocking the exchange of hydraulic oil in the first piston cylinder 4 and the second piston cylinder 8. Then the wave energy float 3 cannot deflect counterclockwise further until the wave energy float 3 rotates with the rocker arm 2 to a horizontal position and opens the first elastic valve 11.

[0042] When the wave energy float 3 rotates at a large angle under the impact of the waves and deflects clockwise, the second gravity pendulum 12 will deviate from the equilibrium position under the action of gravity and push the second movable valve core 16 of the second elastic valve 13 to the right, thereby closing the second elastic valve 13 and blocking the exchange of hydraulic oil in the first piston cylinder 4 and the second piston cylinder 8. Then the wave energy float 3 cannot deflect clockwise further until the wave energy float 3 rotates with the rocker arm 2 to a horizontal position and opens the second elastic valve 13.

[0043] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A rocker-arm type wave energy buoy motion attitude self-control device, characterized in that, include: Support platform; The rocker arm has one end hinged to the support platform and the other end hinged to the wave energy float, having a first hinged position. The movable connector is movably connected to the rocker arm and moves along the rocker arm; The first piston cylinder has a first end and a second end; the first end is hinged to the movable connector, the second end is located above the first hinge position and is statically connected to the wave energy float, and the first end is lower than the second end; The second piston cylinder has a third end and a fourth end; the third end is hinged to the movable connector, and the fourth end is statically connected to the wave energy float; the third end and the fourth end are located on the downward extension line of the first piston cylinder; the cavity of the second piston cylinder has the same inner diameter as the cavity of the first piston cylinder and is connected to it. A valve is disposed at the communication point between the cavity of the second piston cylinder and the cavity of the first piston cylinder; and, A gravity pendulum, hinged to a wave energy float, hangs naturally, and its side is connected to the valve; the gravity pendulum controls the opening and closing of the valve by its swing.

2. The rocker arm type wave energy buoy motion attitude self-control device according to claim 1, characterized in that, include: The arc-shaped guide rail is in the shape of an arc, with the hinge position between the first end and the movable connector as the center; both ends of the arc-shaped guide rail are statically connected to the movable connector, and the third end is hinged to the arc-shaped guide rail and moves along the arc-shaped guide rail.

3. The rocker arm type wave energy buoy motion attitude self-control device according to claim 1, characterized in that, The piston rod end of the first piston cylinder is the first end.

4. The rocker arm type wave energy buoy motion attitude self-control device according to claim 1, characterized in that, The piston rod end of the second piston cylinder is the third end.

5. The rocker arm type wave energy buoy motion attitude self-control device according to claim 1, characterized in that, It also includes a connecting oil pipe; the connecting oil pipe connects the cavity of the second piston cylinder with the cavity of the first piston cylinder; the valve is disposed on the connecting oil pipe.

6. The rocker arm type wave energy buoy motion attitude self-control device according to claim 1, characterized in that, The gravity pendulum includes a first gravity pendulum and a second gravity pendulum; the valve includes a first valve and a second valve; the first gravity pendulum controls the first valve, and the second gravity pendulum controls the second valve.

7. The rocker arm type wave energy float motion attitude self-control device according to claim 1, characterized in that, The valve is a spring valve, which includes a movable valve core. The movable valve core is connected to the side of the gravity pendulum and opens and closes the spring valve under the action of the gravity pendulum.

8. The rocker arm type wave energy buoy motion attitude self-control device according to claim 1, characterized in that, The movable connector is a slider; the slider is slidably connected to the rocker arm and slides along the rocker arm.

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