Composite focusing wave energy power generation device

Abstract

The application belongs to the technical field of marine renewable energy, and provides a composite focusing type wave energy power generation device, which comprises a main body structure, a main shell, an opening formed in the side wall of the main shell, a reflection wall vertically arranged in the main shell, the two ends of the reflection wall fixedly connected with the inner wall of the main shell, a smooth energy gathering cavity formed between the side of the reflection wall close to the opening and the main shell, the opening in communication with the smooth energy gathering cavity, two groups of flow guide tubes arranged on the outer wall of the main shell, the two flow guide tubes vertically fixedly connected with the outer wall of the main shell, and the two flow guide tubes arranged on the two sides of the opening respectively; an energy conversion assembly, which comprises a power generation unit and an oscillating float for driving the power generation unit to operate, and the oscillating float arranged in the smooth energy gathering cavity. The application realizes two-stage amplification of wave energy guidance, gathering and reflection focusing, and has a firm protection function, and simultaneously solves the problems of low wave energy power generation efficiency and poor equipment survivability.

Description

Technical Field

[0001] This invention belongs to the field of marine renewable energy technology, and in particular relates to a composite focusing wave energy power generation device. Background Technology

[0002] Wave energy, as one of the most important energy sources in the ocean, has the advantages of large reserves and wide distribution, and is an important clean energy source for the future. Point absorption wave energy generation devices capture energy through a float that moves up and down with the waves, and are one of the mainstream technologies for wave energy conversion.

[0003] However, existing point absorption devices generally face two major technical bottlenecks: 1. Low energy capture efficiency: The energy density of waves in the ocean is relatively dispersed, and the energy capture capacity of a single buoy is limited. To improve efficiency, some technical solutions propose setting up reflective walls next to the buoy to amplify the wave height by superimposing the reflected wave with the incident wave. However, this usually only utilizes a single reflection principle, resulting in limited gain and a single structural function.

[0004] 2. Poor survivability: Power generation equipment deployed in open sea areas is directly exposed to the harsh marine environment. Under extreme sea conditions such as typhoons and storm surges, the huge wave impact can easily cause devastating damage to the core float and power conversion system (PTO), leading to investment failure. Building breakwaters and other protective structures for the equipment would significantly increase costs and system complexity. Summary of the Invention

[0005] The purpose of this invention is to provide a composite focusing wave energy power generation device to solve the above-mentioned problems. Through an integrated structural design, it achieves two-stage amplification of wave energy through "guidance and convergence" and "reflection and focusing", and also has a robust protection function, so as to solve the problems of low wave energy power generation efficiency and poor equipment survivability at the same time.

[0006] To achieve the above objectives, the present invention provides the following solution: a composite focusing wave energy generation device, comprising: The main structure includes a main shell with an opening on its side wall. A reflective wall is vertically arranged inside the main shell, and both ends of the reflective wall are fixedly connected to the inner wall of the main shell. A smooth energy-gathering cavity is formed between the side of the reflective wall near the opening and the main shell. The opening communicates with the smooth energy-gathering cavity. Two sets of guide tubes are arranged on the outer wall of the main shell. The two guide tubes are vertically fixedly connected to the outer wall of the main shell, and the two guide tubes are respectively arranged on both sides of the opening. An energy conversion component includes a power generation unit and an oscillating float that drives the power generation unit, the oscillating float being disposed within the smooth energy collection cavity.

[0007] Preferably, the reflector wall has a parabolic structure, the geometric focus of the reflector wall is located within the smooth energy collection cavity, and the oscillating float coincides with the geometric focus of the reflector wall.

[0008] Preferably, the main housing is configured as a cylindrical structure, and the edge of the reflective wall is smoothly connected to the inner wall of the main housing.

[0009] Preferably, the outer wall of the guide tube and the outer wall of the main housing are fixedly connected at the edge of the opening, and the guide tube and the main housing are tangentially arranged.

[0010] Preferably, the opening is symmetrically arranged about the plane containing the geometric focus of the reflective wall and the axis of the main housing.

[0011] Preferably, the bottom of the main housing is provided with a plurality of anchors, the anchors including a suction cylinder with the opening facing downward and an air extraction valve provided on the suction cylinder.

[0012] Preferably, the power generation unit includes a hydraulic cylinder vertically fixedly connected to the main housing, the free end of the hydraulic cylinder being disposed at the bottom and fixedly connected to the oscillating float, the hydraulic cylinder being connected to a hydraulic motor through a hydraulic circuit component, the hydraulic circuit component being used to convert the reciprocating extension and retraction motion of the hydraulic cylinder into the rotational motion of the hydraulic motor, and the output shaft of the hydraulic motor being fixedly connected to the main shaft of the generator.

[0013] Preferably, a crossbeam is fixedly connected to the upper inner side of the main housing, and the end of the hydraulic cylinder away from the oscillating float is fixedly connected to the crossbeam.

[0014] Preferably, a damping disc is fixedly connected to the lower part of the oscillating float.

[0015] Preferably, the main shell and the guide tube are made of reinforced concrete or steel-concrete composite material.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: 1. This invention creatively employs two independent cylindrical structures as guide tubes. As one of the most stable and pressure-resistant structural shapes, the cylinder itself can effectively resist and disperse the enormous impact force of waves from all directions, without requiring any additional reinforcing ribs or supports. Compared to traditional flat-plate guide vanes, this design offers exponentially improved structural strength and fatigue resistance, giving the entire device unparalleled survivability under extreme sea conditions such as typhoons and storm surges.

[0017] 2. The smooth curved surface of the guide tube of this invention can guide incident waves more smoothly, effectively reducing energy loss and harmful reflections caused by waves hitting the plate. Waves can be more efficiently introduced into the smooth energy collection cavity behind, improving the efficiency of the first-stage energy collection. At the same time, this structure also has better adaptability and capture capability for non-positive incident waves. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the wave energy generation device of the present invention; Figure 2 This is a top view of the wave energy generation device of the present invention; Figure 3 This is a schematic diagram of the energy conversion component of the present invention; Figure 4 This is an example diagram showing the connection between the main housing and the suction cylinder of the wave energy generation device of the present invention; Figure 5 This is a schematic diagram of the matrix arrangement of multiple wave energy generation devices according to the present invention; The components are: 1. Main shell; 2. Reflector wall; 3. Flow guide tube; 4. Energy conversion component; 41. Crossbeam; 42. Hydraulic cylinder; 43. Float; 44. Damping disc; 5. Suction cylinder; 6. Opening. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1: Reference Figures 1-3 This invention provides a composite focusing wave energy power generation device, comprising: The main structure includes a main shell 1, an opening 6 on the side wall of the main shell 1, a reflective wall 2 vertically arranged inside the main shell 1, the two ends of the reflective wall 2 being fixedly connected to the inner wall of the main shell 1, a smooth energy collection cavity being formed between the side of the reflective wall 2 near the opening 6 and the main shell 1, the opening 6 being connected to the smooth energy collection cavity, and two sets of guide tubes 3 being arranged on the outer wall of the main shell 1, the two guide tubes 3 being vertically fixedly connected to the outer wall of the main shell 1, the two guide tubes 3 being respectively arranged on both sides of the opening 6; The energy conversion component 4 includes a power generation unit and an oscillating float 43 that drives the power generation unit. The oscillating float 43 is disposed in the smooth energy collection cavity.

[0023] The main function of the main shell 1 is to serve as the main support structure of the entire device, supporting and fixing the reflector wall 2, the guide tube 3, and the energy conversion component 4, and providing a rigid barrier protection for the internal energy conversion component 4 under extreme sea conditions. The main function of the reflector wall 2 is to perform secondary reflection and focusing on the waves entering through the opening 6, thereby significantly increasing the wave height and energy density and improving the energy capture efficiency. The main function of the smooth energy collection cavity is to provide a semi-enclosed space enclosed by the reflector wall 2 and the main shell 1 for wave energy gathering and the operation of the oscillating float 43, where the wave superposition and amplification and mechanical energy capture process are completed. The main function of the guide tube 3 is to perform preliminary guidance and gathering on incident waves over a wider range, forming a funnel-shaped inlet channel at the opening 6 to efficiently guide the waves into the smooth energy collection cavity, while using its own cylindrical and robust curved surface structure to resist extreme wave impacts, improving the overall structural strength and survivability of the device. The main function of the oscillating float 43 is to directly capture wave energy, converting wave energy into mechanical energy by swaying up and down with the focused and violent waves, and driving the power generation unit to operate. Overall, this invention utilizes the inherent and superior structural stability and impact resistance of the cylindrical structure, enabling the device to withstand extreme sea conditions without additional reinforcement, thus greatly improving its survivability. At the same time, the smooth curved surface of the guide tube optimizes hydrodynamic performance, reduces energy loss, and improves wave energy capture efficiency.

[0024] Further optimization of the scheme: the reflector wall 2 is a parabolic structure, the geometric focus (F) of the reflector wall 2 is located in the smooth energy collection cavity, and the oscillating float coincides with or is adjacent to the geometric focus (F) of the reflector wall 2.

[0025] Further optimization of the design involves setting the main housing 1 as a cylindrical structure, with the edge of the reflective wall 2 smoothly connected to the inner wall of the main housing 1.

[0026] In this embodiment, the main shell 1 serves as a rigid barrier. By being configured as a cylindrical structure, it can effectively protect the energy conversion components under extreme sea conditions.

[0027] In a further optimized design, the outer wall of the guide tube 3 is fixedly connected to the outer wall of the main housing 1 at the edge of the opening 6, and the guide tube 3 and the main housing 1 are tangent to each other.

[0028] The design was further optimized so that the opening 6 was symmetrically positioned about the plane containing the geometric focus of the reflector wall 2 and the axis of the main shell 1.

[0029] like Figure 2 As shown, the two guide tubes 3 and the inner wall of the main shell 1 together form a funnel-shaped inlet, which performs preliminary convergence and efficient guidance of the incident wave.

[0030] Further optimization of the scheme: the power generation unit includes a hydraulic cylinder 42 vertically fixedly connected in the main housing 1. The free end of the hydraulic cylinder 42 is located at the bottom and fixedly connected to the oscillating float 43. The hydraulic cylinder 42 is connected to a hydraulic motor through a hydraulic circuit component. The hydraulic circuit component is used to convert the reciprocating extension and retraction motion of the hydraulic cylinder 42 into the rotational motion of the hydraulic motor. The output shaft of the hydraulic motor is fixedly connected to the main shaft of the generator.

[0031] In this embodiment, the main housing 1 integrates hydraulic circuit components, generators, hydraulic motors, etc., and all of them are located above the water surface.

[0032] The hydraulic circuit components include a rectifier valve assembly, an accumulator, a hydraulic motor, and a low-pressure oil tank. The upper and lower chamber oil circuits of the hydraulic cylinder 42 are respectively connected to the input end of a rectifier valve assembly (one-way valve bridge) composed of four one-way valves; the high-pressure output end of the rectifier valve assembly is connected in parallel with the accumulator through a high-pressure pipeline, and then connected to the oil inlet of the hydraulic motor; the output shaft of the hydraulic motor is mechanically connected to the main shaft of the generator through a coupling; the return port of the hydraulic motor is connected to the low-pressure oil tank, and the oil tank is then connected back to the rectifier valve assembly through a pipeline, forming a closed / semi-closed hydraulic circulation circuit.

[0033] The working principle of this embodiment is as follows: 1. Wave capture and mechanical energy conversion (wave energy is converted into mechanical energy): After being initially guided by the front guide tube 3 and then focused secondary by the reflector wall 2, the wave height at the focal point (F) increases dramatically. The oscillating float 43 at the focal point (F) is affected by the giant wave and undergoes violent up-and-down swaying motion. The up-and-down motion of the oscillating float 43 directly pushes and pulls the piston rod of the hydraulic cylinder 42 fixed on the crossbeam 41, converting the kinetic energy of the wave into the linear reciprocating mechanical energy of the piston rod.

[0034] 2. Hydraulic rectification (converting reciprocating mechanical energy into pulsating hydraulic energy): The reciprocating motion of the piston rod alternately squeezes the hydraulic oil in the hydraulic cylinder 42. Because the wave motion is bidirectional and irregular, the oil flow output from the hydraulic cylinder 42 alternates between forward and reverse directions. After these alternating oil flows enter the rectifier valve assembly, they are forcibly rectified into pulsating high-pressure oil flowing in a single direction.

[0035] 3. Smoothing and stabilizing pressure (converting pulsating hydraulic energy into stable hydraulic energy): Due to the randomness and intermittent nature of waves, the pressure and flow rate of the rectified high-pressure oil are extremely unstable. The high-pressure oil then enters the accumulator. When the waves are large, the accumulator absorbs and stores excess high-pressure oil and pressure energy; when the waves are trough or small, the accumulator releases the stored pressure oil. The accumulator serves to output a stable and continuous high-pressure oil flow.

[0036] 4. Stable power generation (stable conversion of hydraulic energy into electrical energy): A steady flow of high-pressure oil enters and drives the hydraulic motor to rotate, converting hydraulic energy into stable rotational mechanical energy. The hydraulic motor drives a coaxially connected generator to operate at a constant speed, ultimately outputting high-quality, stable AC power. The low-pressure oil, after performing its work, flows back to the oil tank, awaiting the next cycle.

[0037] In a further optimized design, a crossbeam 41 is fixedly connected to the upper inner side of the main housing 1, and the end of the hydraulic cylinder 42 away from the oscillating float 43 is fixedly connected to the crossbeam 41.

[0038] In a further optimized design, a damping disk 44 is fixedly connected to the lower part of the oscillating float 43.

[0039] like Figure 3 As shown, in this embodiment, the main function of the damping disk 44 is to move up and down with the oscillating float 43, thereby causing the surrounding water to move as well. By increasing the added mass of the oscillating float 43, the natural frequency of the float system composed of the oscillating float 43 and the damping disk 44 is reduced, making it closer to the low-frequency wave frequency commonly found in actual sea areas, thereby improving the wave energy capture efficiency. At the same time, the damping disk 44 will experience greater fluid resistance during vertical movement to increase heave damping and limit extreme motion amplitude.

[0040] Example 2: Further optimize the plan, such as Figure 4 As shown, the bottom of the main housing 1 is provided with multiple anchors, including a suction cylinder 5. The opening of the suction cylinder 5 is set downward, and an air extraction valve is provided on the suction cylinder 5.

[0041] The design was further optimized by using reinforced concrete or steel-concrete composite materials for the main shell 1 and the guide tube 3.

[0042] In this embodiment, the main shell 1, the guide tube 3, and the suction tube 5 all adopt a cylindrical structure, which can be directly manufactured using mature steel plate rolling and welding processes from shipyards or steel structure plants, or precast concrete slip-form casting processes. This simple and regular geometric structure facilitates mass production on assembly lines and promotes standardized manufacturing. Meanwhile, the reflector wall 2, energy conversion component 4, suction cylinder 5, and guide cylinder 3 of the wave energy power generation device of the present invention can all be modularly assembled and debugged at land port terminals, avoiding the problem of traditional wave energy devices needing to be assembled at sea under high sea conditions.

[0043] In a further optimized embodiment, since the bottom of the main shell 1 integrates a suction cylinder 5, after the wave energy power generation device is towed to the target sea area by a tugboat, its own weight can initially penetrate the bottom of the suction cylinder 5 into the seabed. Subsequently, the suction pump extracts seawater from the suction cylinder 5 through the air extraction valve to create negative pressure, and uses the huge seabed pressure difference to smoothly press the entire wave energy power generation device into the seabed.

[0044] Traditional piling installation typically takes several days and is highly dependent on sea conditions. The suction cylinder 5 significantly increases installation speed, usually completing sinking and consolidation within hours. This greatly extends the weather window for marine construction operations and reduces the risk of delays due to typhoons or severe sea conditions. Furthermore, the installation process is noiseless, making it extremely environmentally friendly. When the device reaches the end of its service life or needs to be relocated, simply injecting water and pressurizing the cylinder allows the entire device to be removed from the seabed, achieving low-cost equipment reuse and seamless seabed restoration.

[0045] Example 3: like Figure 5 As shown in this embodiment, in the construction of artificial islands or coastal engineering, the wave energy power generation device of the present invention can be arranged in a matrix to directly replace the traditional riprap breakwater or caisson breakwater, forming a breakwater with the dual functions of "coastal protection (dissipating wave energy)" and "green power generation (collecting wave energy)".

[0046] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0047] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A composite focusing wave energy power generation device, characterized in that, include: The main structure includes a main shell (1), an opening (6) on the side wall of the main shell (1), a reflective wall (2) vertically arranged inside the main shell (1), the two ends of the reflective wall (2) being fixedly connected to the inner wall of the main shell (1), a smooth energy collection cavity being formed between the side of the reflective wall (2) near the opening (6) and the main shell (1), the opening (6) communicating with the smooth energy collection cavity, and two sets of guide tubes (3) arranged on the outer wall of the main shell (1), the two guide tubes (3) being vertically fixedly connected to the outer wall of the main shell (1), and the two guide tubes (3) being respectively arranged on both sides of the opening (6); The energy conversion component (4) includes a power generation unit and an oscillating float (43) that drives the power generation unit to operate. The oscillating float (43) is disposed in the smooth energy collection cavity.

2. The composite focusing wave energy generation device according to claim 1, characterized in that: The reflector wall (2) has a parabolic structure, and the geometric focus of the reflector wall (2) is located in the smooth energy collection cavity. The oscillating float coincides with the geometric focus of the reflector wall (2).

3. The composite focusing wave energy generation device according to claim 1, characterized in that: The main housing (1) is configured as a cylindrical structure, and the edge of the reflective wall (2) is smoothly connected to the inner wall of the main housing (1).

4. A composite focusing wave energy generation device according to claim 3, characterized in that: The outer wall of the guide tube (3) and the outer wall of the main shell (1) are fixedly connected at the edge of the opening (6), and the guide tube (3) and the main shell (1) are tangentially arranged.

5. A composite focusing wave energy generation device according to claim 1, characterized in that: The opening (6) is symmetrically arranged about the plane containing the geometric focus of the reflective wall (2) and the axis of the main shell (1).

6. A composite focusing wave energy generation device according to claim 1, characterized in that: The bottom of the main housing (1) is provided with a plurality of anchors, the anchors including a suction cylinder (5), the opening of the suction cylinder (5) is downward and the suction cylinder (5) is provided with an air extraction valve.

7. A composite focusing wave energy generation device according to claim 1, characterized in that: The power generation unit includes a hydraulic cylinder (42) vertically fixedly connected in the main housing (1). The free end of the hydraulic cylinder (42) is located at the bottom and fixedly connected to the oscillating float (43). The hydraulic cylinder (42) is connected to a hydraulic motor through a hydraulic circuit component. The hydraulic circuit component is used to convert the reciprocating extension and retraction motion of the hydraulic cylinder (42) into the rotational motion of the hydraulic motor. The output shaft of the hydraulic motor is fixedly connected to the main shaft of the generator.

8. A composite focusing wave energy generation device according to claim 7, characterized in that: A crossbeam (41) is fixedly connected to the upper inner side of the main housing (1), and the end of the hydraulic cylinder (42) away from the oscillating float (43) is fixedly connected to the crossbeam (41).

9. A composite focusing wave energy generation device according to claim 7, characterized in that: The lower part of the oscillating float (43) is fixedly connected to a damping disk (44).

10. A composite focusing wave energy generation device according to claim 3, characterized in that: The main shell (1) and the guide tube (3) are made of reinforced concrete or steel-concrete composite materials.

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