Bidirectional wave energy efficient conversion device self-adaptive to wave direction

Abstract

The self-adaptive wave energy conversion device solves the problem that a traditional wave energy device is low in conversion efficiency. The device is composed of an energy conversion system, an energy harvesting system and a carrying platform. Wherein a supporting platform included in the carrying platform is driven by the fin empennage to rotate automatically along with the wave direction, so that the wave plate is orthogonal to the transverse wave; a spherical floater under the energy capturing system captures longitudinal wave energy, and a wave plate captures transverse wave energy; the innovative hydraulic module under the energy conversion system adopts marble point contact and a two-stage sliding sealing ring to reduce friction loss, the friction resistance can be reduced by 39.3%, a pre-pressing spring is introduced to realize compression energy storage in a trough stage, and elastic force is released in a crest stage to increase the stroke. The stroke and the self-adaptive mechanism are increased through the spring, the energy conversion efficiency is improved by 20% or above, and the device is suitable for the low-density wave environment.

Description

Technical Field

[0001] This invention relates to the field of wave energy power generation, and in particular to an adaptive wave direction bidirectional wave energy high-efficiency conversion device, which is especially suitable for coastal environments with wave energy density below 10kW / m. Background Technology

[0002] In accordance with my country's "carbon neutrality" policy, the country has increased its emphasis on developing new energy sources. Wave energy, as an important branch of new energy, holds an important position in my country, which has a coastline of over 18,000 kilometers. At the same time, compared with wind and solar energy, wave energy power generation technology is still in an immature stage. However, due to its huge reserves and stability, wave energy stands out among many marine energy resources and has attracted worldwide attention for its research.

[0003] Currently, mainstream wave energy generation technologies can be categorized into six types: point absorption, oscillating water column, wave-dissipating, horizontal pendulum, overtaking, and buoyancy pendulum. Among these, the oscillating buoy wave energy conversion device, as a branch of the point absorption type, has been widely researched and applied in various countries due to its simple structure and reliable performance. Meanwhile, for the absorption of longitudinal wave energy, the buoyancy pendulum wave energy conversion device has also received widespread attention both domestically and internationally due to its simple structure and reliable performance.

[0004] However, existing technologies suffer from three major bottlenecks: oscillating float devices only respond to vertical waves, with transverse wave energy utilization of less than 15%; buoyancy pendulum devices experience efficiency degradation of over 40% when the wave direction shift is greater than 20°; and energy conversion loss: traditional hydraulic sealing structures suffer mechanical energy loss of more than 65% due to sliding friction.

[0005] Meanwhile, due to the low wave energy density in my country, the large-scale development and application of wave energy has been limited to some extent. Therefore, it is particularly important to solve the problems of low transmission efficiency and limited conversion efficiency of traditional wave energy devices and improve the wave energy absorption efficiency. Summary of the Invention

[0006] In order to overcome the problems of low transmission efficiency, low conversion efficiency and low wave energy absorption efficiency in the existing wave energy power generation process, the present invention provides an adaptive wave direction bidirectional wave energy high-efficiency conversion device, which converts wave energy into hydraulic energy, and uses hydraulic energy to realize the high-level transportation of water sources, and further uses it for power generation.

[0007] The technical problem solved by this invention is: an adaptive wave direction bidirectional wave energy high-efficiency conversion device, which includes an energy conversion system that reduces resistance by point contact between a ball and a sealing body; a bidirectional energy harvesting system that harvests energy longitudinally through a spherical float and laterally through a wave plate; and a mounting platform that adapts to the wave direction by rotating the support platform. This device increases the stroke and adaptive mechanism through springs, thereby improving the energy conversion efficiency by more than 20%, and is suitable for low-density wave environments.

[0008] The core of this device lies in the sealing body of the wave energy conversion device, which includes a sliding sealing ring and a ball chuck. By having the ball make point contact with the outer shell, it can reduce frictional resistance by 39.3% while ensuring sealing and improving energy conversion efficiency. The spring in the wave energy conversion device compresses and stores energy at the trough and releases it at the crest, which can increase the stroke of the wave energy conversion device by 25%. When the fin-shaped tail at the end of the wave plate is impacted by the transverse wave and generates torque, the wave direction adaptive mechanism on the mounting platform drives the support platform to rotate, so that the wave plate is orthogonal to the wave direction in real time (deviation angle ≤ 5°), thereby improving the wave energy absorption efficiency.

[0009] Furthermore, the columnar support passes through a through hole in the center of the circular boss on the base platform. The circular boss and the columnar support are then connected and fixed using a locking knob. When the locking knob is not locked, the columnar support can move in one direction relative to the base platform. This connection method facilitates equipment assembly and disassembly, as well as adjusting the platform height to adapt to different water depths. The base platform is also equipped with a wave direction adaptive mechanism. The base platform and the support platform are connected via bearings. The fin-shaped tail fin at the end of the wave plate generates torque upon impact from transverse waves, driving the support platform to rotate, ensuring the wave plate is orthogonal to the wave direction in real time; this further improves the wave energy absorption efficiency of the wave plate.

[0010] Furthermore, the base platform has a central through-hole surrounded by four other through-holes, allowing the four connecting columns of the wave energy conversion device to be connected to the base platform via these four through-holes and nuts. Additionally, the support platform has four converter bases, each with four through-holes adapted to the dimensions of the wave energy conversion device's connecting columns. These connecting columns are then connected to the support platform via the through-holes in the support base and nuts. This fixing method facilitates future maintenance.

[0011] Furthermore, the wave plate is hinged to a support column on the support platform via a short axis, and connected to the wave energy conversion device via a slotted hole and a connecting block with a circular boss. This allows the wave plate to rotate around its short axis with the transverse waves, thereby driving the wave energy conversion device. A spherical float is threadedly connected to the pull rod of the wave energy conversion device, causing the float to move up and down with the longitudinal waves, thus driving the wave energy conversion device. Due to the excellent float response characteristics of the spherical float, the wave energy absorption efficiency is greatly improved. Correspondingly, because the pull rod of the wave energy conversion device is threaded, it can be directly replaced with a float that has a higher absorption efficiency through the thread.

[0012] Furthermore, the seal body has a through hole at its center, through which the pull rod passes, and the seal body is tightly connected to the pull rod by means of threads and nuts.

[0013] The beneficial effects of this invention are as follows: First, in terms of adaptability, the use of a retractable cylindrical support and locking knob relative to the base platform enhances the equipment's adaptability to wave environments at different depths. Regarding absorption efficiency, the device employs a combination of a spherical float and a wave plate. The spherical float and wave plate work independently, simultaneously capturing longitudinal and transverse wave energy. Simultaneously, the support platform and base platform are connected by bearings. The fin-shaped tail fins on the wave plate drive the support platform to rotate under the action of transverse waves, ensuring the wave plate remains orthogonal to the wave direction, thereby increasing energy capture efficiency by at least 40%. Finally, in terms of energy conversion efficiency, the sealing ring and cylindrical shell are interference-fitted, with the remaining components relying on ball bearings for point contact support. This ensures sealing while reducing resistance by 39.3%, thus improving energy conversion efficiency. Furthermore, the spring between the sealing body and the top cover in the wave energy conversion device can drive the spring via a pull rod under the influence of gravity on the float, increasing the stroke of the wave energy conversion device by 25% and directly increasing the amount of wave energy converted in a single operation. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a left view of the overall structure of the present invention;

[0017] Figure 3 This is a cross-sectional view of the wave energy conversion device of the present invention, which focuses on the sealing body and its ball contact structure.

[0018] In the diagram: 1. Wave energy conversion device; 1-1. Pull rod; 1-2. Base; 1-3. Connecting column; 1-4. Cylindrical outer shell; 1-5. Top cover; 1-6. Sealing ring; 1-7. Spring; 1-8. Sealing body; 1-8-1. Ball bearing chuck; 1-8-2. Piston baffle; 1-8-3. Inner ring of sliding sealing ring; 1-8-4. Outer ring of sliding sealing ring; 1-8-5. Sealing ring support plate; 1-8-6. Ball bearing; 2. Mounting platform 2-1 Support platform; 2-2 Boss with through hole; 2-3 Locking knob; 2-4 Column support; 2-5 Rib plate; 2-6 Base plate; 2-7 Short shaft; 2-8 Converter base; 2-9 Support column; 2-10 Base platform; 2-11 Trapezoidal platform with through hole; 3 Spherical float; 4 Wave plate; 4-1 Fin-shaped tail fin; 5 M6 nut; 6 Connecting block with circular boss; 7 M8 nut; 8 Bearing. Detailed Implementation

[0019] The present invention will now be described with reference to the accompanying drawings to ensure that those skilled in the art can better understand the purpose, technical solution and advantages of the present invention.

[0020] As shown in the figure, the adaptive wave direction bidirectional wave energy high-efficiency conversion device includes an energy conversion system, an energy harvesting system, and a mounting platform.

[0021] In this example, as Figure 1 , Figure 2 As shown, in the mounting platform, four columnar supports 2-4 pass through the through-hole bosses 2-2 of the base platform 2-10. The height is locked by the locking knob 2-3. All four columnar supports 2-4 can move up and down relative to the base platform 2-10 in the unlocked state, so that the height of the equipment can be adjusted for different environments to adjust the contact area between the energy harvesting system and the water, thereby improving applicability and energy absorption efficiency. The base platform 2-10 is provided with a trapezoidal platform 2-11 with through holes to install bearings 8. The support platform 2-1 is mounted on the bearings 8 to form a rotating pair. This allows the support platform 2-1 to rotate relative to the base platform 2-10 through the bearings 8 under the influence of transverse waves in different directions. This ensures that the wave plate 4 in the energy harvesting system is always orthogonal to the direction of transverse wave movement, thereby improving the energy absorption efficiency of the wave plate 4.

[0022] In this example, as Figure 1 , Figure 2As shown, in the energy capture system, two different wave energy absorption structures are adopted to improve the wave energy absorption efficiency. The spherical float 3 has a threaded hole and is connected to the pull rod 1-1 in the wave energy conversion device 1 via a thread. Under longitudinal wave drive, the spherical float 3 drives the pull rod 1-1 to move axially, thereby driving the wave energy conversion device. Furthermore, the threaded connection increases the interchangeability of the device, facilitating replacement when a float with higher performance is found in the future. The wave plate 4 is hinged to the support platform 2-1 via a short shaft 2-7, and the wave plate 4 connects to the wave energy conversion device 1 via a slot on its connecting column. The convex boss connecting block 6 cooperates with the transverse wave to make the wave plate 4 rotate around the short axis 2-7. The connecting block 6 with the circular boss drives the pull rod 1-1 to reciprocate. In addition, the wave plate 4 is provided with a fish fin-shaped tail 4-1. When waves from different directions act on the fish fin-shaped tail 4-1, the fish fin-shaped tail 4-1 will drive the support platform 2-1 to rotate accordingly under the action of the force, so as to increase the force-bearing area of ​​the wave plate 4 and thus increase the energy absorption efficiency of the wave plate 4. Because a single energy capture system structure can only absorb wave energy in a single direction, while the spherical float 3 and the wave plate 4 work independently and synchronously capture wave energy in orthogonal directions, thereby improving the wave energy absorption efficiency.

[0023] In this example, as Figure 3 As shown, in the wave energy conversion device 1, in order to reduce resistance and improve conversion efficiency, the sealing ring support plate 1-8-5 is sequentially fitted with the inner ring 1-8-3 and the outer ring 1-8-4 of the sliding sealing ring, and is axially pressed by the piston baffle 1-8-2 and the ball chuck 1-8-1 to form a sealing body. The sealing body has a through hole in the center, through which the pull rod 1-1 passes, and the sealing body is tightly connected to the pull rod 1-1 by the thread and the M6 ​​nut 5. Since only the sealing ring is an interference fit between the sealing body and the cylindrical shell 1-4, and the rest is supported by the ball 1-8-6 for point contact, the resistance can be greatly reduced and the energy conversion efficiency can be improved while ensuring the sealing performance.

[0024] In this example, as Figure 3 As shown, in order to improve the conversion efficiency of the device, a spring 1-7 is connected between the sealing body 1-8 and the top cover 1-5 in the wave energy conversion device 1, which can make the sealing body recover faster. At the same time, the spherical float 3 can drive the pull rod 1-1 to drive the spring 1-7 under the action of gravity, thereby increasing the stroke of the wave energy conversion device and significantly improving the wave energy conversion efficiency.

[0025] Operating principle: In the initial state, due to its own weight, the spring 1-7 under the sealed body compresses and stores energy. Under the action of longitudinal waves, the spherical float 3 rises with the waves, driving the pull rod 1-7 to lift. The sealed body 1-8 compresses the upper half of the fluid inside the cylindrical shell 1-4 and outputs it outward. When the waves are at the trough, the spherical float 3 drives the pull rod 1-1 to fall due to gravity. The sealed body 1-8 compresses the lower half of the fluid inside the cylindrical shell 1-4 and the spring 1-7. The upper half of the cylindrical shell 1-4 draws in the fluid to be output, filling the cavity, and in the next... During compression, the fluid is delivered to the connected circuit. Under the action of transverse waves, the wave plate 4 swings with the waves, and drives the pull rod 1-1 to reciprocate through the connecting block 6 with a circular boss, which in turn drives the sealing body 1-8 to reciprocate, continuously outputting fluid to the outside. At the same time, affected by waves in different directions, the support platform 2-1 will rotate with the direction of the waves under the action of the fin-shaped float 4-1 on the wave plate 4, so as to ensure that the force-bearing area of ​​the wave plate is always at a large value. During this period, the swing of the wave plate 4 and the up and down floating of the spherical float 3 are not affected by the rotation.

[0026] Those skilled in the art should understand that the implementation of this invention is not limited to the foregoing examples. These examples and the descriptions in the specification are intended to illustrate the basic concepts of the invention. Various adjustments and optimizations are permitted without departing from the core principles and scope of the invention. All such adjustments and optimizations fall within the scope of protection claimed by this invention. The scope of protection of this invention is determined by the appended claims and their equivalents.

Claims

1. A bidirectional wave energy conversion device with adaptive wave direction, characterized in that, Includes: a mounting platform: the base platform (2-10) and the support platform (2-1) are rotatably connected by a bearing (8), allowing the support platform to rotate and adapt to the wave direction, and a height-adjustable columnar support (2-4) and a locking knob (2-3) are provided between the two; an energy harvesting system: including a longitudinally responsive spherical float (3) and a transversely responsive wave plate (4), wherein the wave plate (4) is fixed to a fish fin-shaped tail fin (4-1); and an energy conversion system: including a sealing component and a spring (1-7), wherein the sealing body reduces resistance through point contact with a ball.

2. The adaptive wave direction bidirectional wave energy high-efficiency conversion device according to claim 1, characterized in that: The mounting platform includes a base platform (2-10) with four through-hole bosses (2-2) and a trapezoidal platform (2-11) with through holes; four liftable column supports (2-4) are inserted through the through-hole bosses (2-2) and their height is locked by a locking knob (2-3); a support platform (2-1) is rotatably mounted on the trapezoidal platform (2-11) with through holes via bearings (8), and has four support columns (2-9) and four converter bases (2-8) on it.

3. The adaptive wave direction bidirectional wave energy high-efficiency conversion device according to claim 1, characterized in that: The energy harvesting system includes a longitudinal energy harvesting system and a transverse energy harvesting system; wherein the longitudinal energy harvesting system is a spherical float (3), which is connected to the pull rod (1-1) of the energy conversion system by a thread; the transverse energy harvesting system is a wave plate (4), which is hinged to the support column (2-9) by a short shaft (2-7), and connected to the wave energy conversion device (1) by a slot and a connecting block (6) with a circular boss.

4. The adaptive wave direction bidirectional wave energy high-efficiency conversion device according to claim 1, characterized in that: In the energy conversion system, the sealing body (1-8) is fitted with a sealing ring support plate (1-8-5), a sliding sealing ring inner ring (1-8-3), and a sliding sealing ring outer ring (1-8-4) in sequence from the inside to the outside, and is axially constrained by a piston baffle (1-8-2) and a ball chuck (1-8-1).

5. The adaptive wave direction bidirectional wave energy high-efficiency conversion device according to claim 4, characterized in that: The groove on the ball chuck (1-8-1) in the sealing body (1-1) contains a ball (1-8-6), which makes it make point contact with the inner wall of the cylindrical shell (1-4) through the ball.

6. The adaptive wave direction bidirectional wave energy high-efficiency conversion device according to claim 5, characterized in that: The pull rod (1-1) passes through the top cover (1-5) and is threaded to the sealing body (1-1).

7. The adaptive wave direction bidirectional wave energy high-efficiency conversion device according to claim 6, characterized in that: Spring (1-7) is sleeved on the pull rod (1-1) and pre-compressed between the top cover (1-5) and the sealing body (1-1).

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