Wave energy converter based on a hose-type hydraulic conversion system

Abstract

The application provides a wave energy power generation device based on a hose type hydraulic conversion system, which comprises a capturing system, a medium conversion system, a power generation system and a support frame, the support frame is fixedly installed on a shore base, the capturing system is arranged on the support frame, one end of the capturing system is arranged on a water surface, the other end of the capturing system is fixedly sleeved to the medium conversion system, the capturing system is used for capturing water wave potential energy, the water wave potential energy is converted into medium energy through the medium conversion system, the medium energy is converted into electric power through the power generation system, and the power generation system and the medium conversion system are respectively fixedly installed on the support frame or the shore base. The wave energy power generation device based on the hose type hydraulic conversion system has the advantages of simple and compact structure, convenient installation, no need of offshore installation and distribution, and can be installed on the shore base or various marine engineering structures such as ships and ocean platforms.

Description

Technical Field

[0001] This invention belongs to the field of wave energy power generation, and in particular relates to a wave energy power generation device based on a hose-type hydraulic conversion system. Background Technology

[0002] Wave energy is a specific form of ocean energy and one of the most important energy sources in the ocean. Its development and utilization are crucial for alleviating the energy crisis and reducing environmental pollution. Wave energy power generation can be divided into two parts: an energy harvesting system and an energy conversion system. The harvesting system captures wave energy, while the conversion system converts the captured wave energy into a specific form of mechanical or electrical energy. It consists of several main components, including an air impeller, a low-head turbine, a hydraulic system, a mechanical system, and a generator. Existing wave energy harvesting components, due to the connection of one end to a generating damper, are subject to significant wave impact at the other end, resulting in a shorter lifespan. Furthermore, when the wave impact force does not reach the load level, the harvesting component cannot be driven to swing, leading to low wave energy utilization. Summary of the Invention

[0003] In view of this, the present invention aims to propose a wave energy power generation device based on a hose-type hydraulic conversion system to solve the problems of low wave energy utilization rate and high impact and short service life of the capture components in the prior art.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A wave energy power generation device based on a hose-type hydraulic conversion system includes a capture system, a medium conversion system, a power generation system, and a support frame. The support frame is fixedly installed on a shore foundation, and the capture system is installed on the support frame. One end of the capture system is placed on the water surface, and the other end of the capture system is fixedly connected to the medium conversion system. The capture system is used to capture the potential energy of the water waves. The potential energy of the water waves is converted into medium energy through the medium conversion system, and the medium energy is converted into electricity through the power generation system. The power generation system and the medium conversion system are respectively fixedly installed on the support frame or the shore foundation.

[0006] Furthermore, the capture system includes a rotating shaft and a float respectively installed at both ends of the swing arm. The float floats on the water surface, and one end of the swing arm is rotatably connected to the support frame through the rotating shaft. The rotating end is also fixedly connected to one end of the medium conversion system.

[0007] Furthermore, the float includes an integral floating upper part and a floating lower part. The floating upper part is a cylindrical structure, and the floating lower part is fixedly installed at the lower end of the floating upper part. The floating lower part is a conical or frustum structure.

[0008] Furthermore, the medium conversion system includes a housing, a scraper, a rubber hose, an oil tank, and a medium pipeline. The bottom of the housing has an arc-shaped structure, and the outer periphery of the rubber hose is fixed along the inner wall of the arc-shaped structure. A central shaft is rotatably connected to the middle of the housing, and one end of the central shaft is fixedly connected to one end of a rotating shaft. A scraper is fixedly installed on the outer periphery of the central shaft. A float moves up and down by water waves, and the up-and-down moving float drives the scraper to swing in an arc shape through a rocker arm, a rotating shaft, and a central shaft in sequence. One end of the arc-shaped swinging scraper is pressed against the outer periphery of the rubber hose, and the rubber hose is connected to the oil tank through the medium pipeline. The oil tank is located above the rubber hose and is filled with oil. The arc-shaped swinging scraper can drive the oil to move within the rubber hose and the medium pipeline. A power generation system is installed on the medium pipeline, and the displaced oil is converted into electricity through the power generation system.

[0009] Furthermore, the outer periphery of the central axis is sealed to the side wall of the housing via a skeleton seal.

[0010] Furthermore, the medium pipeline includes a low-pressure circuit, a high-pressure circuit, a first pipe body, a second pipe body, a third pipe body, a fourth pipe body, a fifth pipe body, and a sixth pipe body. One end of the first pipe body is connected to one end of a rubber hose, and the other end of the first pipe body is connected to one end of the third pipe body and one end of the fourth pipe body, respectively. The other end of the third pipe body is connected to the first end of the high-pressure circuit, and the other end of the fourth pipe body is connected to the first end of the low-pressure circuit. The second ends of the high-pressure circuit and the second ends of the low-pressure circuit are respectively connected to the oil tank. One end of the second pipe body is connected to the other end of the rubber hose, and the other end of the second pipe body is connected to... The first end of the fifth pipe and the first end of the sixth pipe are connected. The second end of the fifth pipe is connected to the first end of the low-pressure circuit, and the second end of the sixth pipe is connected to the first end of the high-pressure circuit. A one-way valve is installed in each of the third, fourth, fifth, and sixth pipes. The oil flows through the first and third pipes to the high-pressure circuit, through the low-pressure circuit and the fourth pipe to the first pipe, through the second and sixth pipes to the high-pressure circuit, and through the low-pressure circuit and the fifth pipe to the second pipe. A power generation system is installed on the high-pressure circuit.

[0011] Furthermore, the power generation system includes a hydraulic motor and a generator installed at one end, with the hydraulic motor mounted on the high-voltage circuit.

[0012] Furthermore, the second end of the high-pressure circuit is connected to one end of the seventh pipe and one end of the eighth pipe respectively, and the other end of the seventh pipe and the other end of the eighth pipe are connected to the oil tank respectively. An overflow valve is installed on the seventh pipe and a throttle valve is installed on the eighth pipe. The pressurized medium in the high-pressure circuit flows into the hydraulic motor through the throttle valve.

[0013] Furthermore, an energy storage device is installed on the high-voltage circuit.

[0014] Compared with existing technologies, the wave energy power generation device based on a hose-type hydraulic conversion system described in this invention has the following advantages:

[0015] (1) The wave energy power generation device based on the hose-type hydraulic conversion system described in this invention has a simple and compact structure, is easy to install, does not require offshore installation and deployment, and can be installed on shore or on various marine engineering structures such as ships and offshore platforms.

[0016] (2) The wave energy power generation device based on the hose-type hydraulic conversion system described in this invention converts wave energy into rotational kinetic energy through the capture system, and the hose-type hydraulic conversion system directly converts rotational kinetic energy into hydraulic energy. It has high conversion efficiency and strong stability. Compared with the traditional hydraulic cylinder type hydraulic conversion system, it has low starting pressure. The modular design can be matched with other rotational wave energy capture systems (such as pendulum type, nodding duck type, etc.), and the nearshore surge phenomenon increases the wave energy captured by the device.

[0017] (3) The wave energy power generation device based on the hose-type hydraulic conversion system described in this invention has high reliability, is less affected by wave impact, and has high safety. The hydraulic conversion system is installed on the shore and does not come into direct contact with seawater, so it is less affected by corrosion and is not impacted by wave force. The fully sealed structure avoids seawater splashing and corrosion of the interior, and also avoids environmental pollution caused by internal hydraulic oil leakage. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is a side view schematic diagram of the wave energy power generation device based on a hose-type hydraulic conversion system according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the wave energy power generation device based on a hose-type hydraulic conversion system according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional structural diagram of the media conversion system described in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram illustrating the principle of hydraulic power generation according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1-Capture system; 11-Shaft; 12-Float; 121-Upper part of float; 122-Lower part of float; 13-Swing arm; 2-Media conversion system; 21-Box; 22-Scraper; 23-Rubber hose; 24-Oil tank; 25-Media pipeline; 251-Low-pressure circuit; 252-High-pressure circuit; 253-First pipe body; 254-Second pipe body; 255-Third pipe body; 256-Fourth pipe body; 257-Fifth pipe body; 258-Sixth pipe body; 259-Seventh pipe body; 2510-Eighth pipe body; 26-Central shaft; 27-Accumulator; 28-Throttle valve; 29-Relief valve; 3-Power generation system; 31-Hydraulic motor; 32-Generator; 4-Shore base; 5-Support frame. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figure 1-4As shown, the wave energy power generation device based on the hose-type hydraulic conversion system includes a capture system 1, a medium conversion system 2, a power generation system 3, and a support frame 5. The support frame 5 is fixedly installed on the shore base 4, and the capture system 1 is installed on the support frame 5. One end of the capture system 1 is placed on the water surface, and the other end of the capture system 1 is fixedly connected to the medium conversion system 2. The capture system 1 is used to capture the potential energy of the water waves. The potential energy of the water waves is converted into medium energy through the medium conversion system 2. The medium energy is converted into electricity through the power generation system 3. The power generation system 3 and the medium conversion system 2 are respectively fixedly installed on the support frame 5 or the shore base 4. The device has a simple and compact structure, is easy to install, does not require offshore installation and deployment, and can be installed on the shore base 4 or various marine engineering structures such as ships and offshore platforms.

[0030] The capture system 1 includes a rotating shaft 11 and a float 12 installed at both ends of the swing arm 13. The float 12 floats on the water surface. One end of the swing arm 13 is rotatably connected to the support frame 5 through the rotating shaft 11, and the rotating end is fixedly connected to one end of the medium conversion system 2.

[0031] The float 12 includes an integral upper floating part and a lower floating part. The upper floating part is a cylindrical structure, and the lower floating part is fixedly installed at the lower end of the upper floating part. The lower floating part is a conical or frustum structure.

[0032] The media conversion system 2 includes a housing 21, a scraper 22, a rubber hose 23, an oil tank 24, and a media pipeline 25. The bottom of the housing 21 has an arc-shaped structure. The outer periphery of the rubber hose 23 is fixed along the inner wall of the arc-shaped structure. A central shaft 26 is rotatably connected to the middle of the housing 21, and one end of the central shaft 26 is fixedly connected to one end of a rotating shaft 11. The scraper 22 is fixedly installed on the outer periphery of the central shaft 26. The float 12 moves up and down by water waves, and the up-and-down moving float 12 drives the scraper 22 to swing in an arc shape through the rocker arm, rotating shaft 11, and central shaft 26 in sequence. One end of the arc-shaped swinging scraper 22 is pressed against the outer periphery of the rubber hose 23, and the rubber hose 23 is connected to the oil tank 24 through the media pipeline 25. Located above the rubber hose 23, the oil tank 24 is filled with oil. The arc-shaped oscillating scraper 22 can drive the oil to move within the rubber hose 23 and the medium pipeline 25. A power generation system 3 is installed on the medium pipeline 25. The displaced oil is converted into electricity through the power generation system 3. The capture system 1 converts wave energy into rotational kinetic energy. The hose-type hydraulic conversion system directly converts rotational kinetic energy into hydraulic energy. It has high conversion efficiency and strong stability. Compared with the traditional hydraulic cylinder type hydraulic conversion system, it has a lower starting pressure. The modular design can be matched with other rotational wave energy capture systems 1 (such as pendulum type, nodding duck type, etc.), and the nearshore surge phenomenon increases the wave energy captured by the device.

[0033] The housing 21 is a sealed structure, and the outer periphery of the central shaft 26 is sealed to the side wall of the housing 21 through a skeleton seal. The device has high reliability, is less affected by wave impact, and has high safety. The hydraulic conversion system is installed on the shore and does not come into direct contact with seawater, so it is less affected by corrosion and is not affected by wave impact. The fully sealed structure avoids seawater splashing and corrosion of the interior, and also avoids environmental pollution caused by internal hydraulic oil leakage.

[0034] The medium pipeline 25 includes a low-pressure circuit 251, a high-pressure circuit 252, a first pipe body 253, a second pipe body 254, a third pipe body 255, a fourth pipe body 256, a fifth pipe body 257, and a sixth pipe body 258. One end of the first pipe body 253 is connected to one end of the rubber hose 23, and the other end of the first pipe body 253 is connected to one end of the third pipe body 255 and one end of the fourth pipe body 256, respectively. The other end of the third pipe body 255 is connected to the first end of the high-pressure circuit 252, and the other end of the fourth pipe body 256 is connected to the first end of the low-pressure circuit 251. The second ends of the high-pressure circuit 252 and the low-pressure circuit 251 are respectively connected to the oil tank 24. One end of the second pipe body 254 is connected to the other end of the rubber hose 23, and the other end of the second pipe body 254 is connected to the first end of the fifth pipe body 257 and the first end of the sixth pipe body 258, respectively. The second end of the fifth pipe body 257 is connected to the first end of the low-pressure circuit 251, and the second end of the sixth pipe body 258 is connected to... The oil is connected to the first end of the high-pressure circuit 252, and a one-way valve is installed in each of the third pipe body 255, the fourth pipe body 256, the fifth pipe body 257, and the sixth pipe body 258. The oil flows sequentially through the first pipe body 253 and the third pipe body 255 to the high-pressure circuit 252. The oil flows sequentially through the low-pressure circuit 251 and the fourth pipe body 256 to the first pipe body 253. The oil flows sequentially through the second pipe body 254 and the sixth pipe body 258 to the high-pressure circuit 252. The oil flows sequentially through the low-pressure circuit 251 and the fourth pipe body 256 to the first pipe body 253. Circuit 251 and the fifth pipe 257 are connected to the second pipe 254. A power generation system 3 is installed on the high-pressure circuit 252. A check valve is used to ensure the passage of pressurized medium inside the hydraulic conversion system. When the scraper 22 squeezes the rubber hose 23 forward, it discharges oil. When the rubber hose 23 behind the scraper 22 forms a cavity, it draws in oil. In the hydraulic circuit, the hydraulic oil always flows in one direction. The function of the check valve is to keep the flow direction of the hydraulic circuit consistent regardless of whether the oil outlet is sucking in or discharging oil.

[0035] The power generation system 3 includes a hydraulic motor 31 and a generator 32 installed at one end. The hydraulic motor 31 is installed on the high-voltage circuit 252 and connected to the generator 32. When the hydraulic motor 31 rotates, it drives the generator 32 to rotate and generate electricity. The hydraulic motor 31 and the generator 32 are existing technologies. An accumulator 27 is installed on the high-voltage circuit 252. The accumulator 27 is an existing bladder-type accumulator. The accumulator 27 is used to ensure the pressure of the medium flowing from the high-voltage circuit 252 to the hydraulic motor 31. When the oil pressure in the high-voltage circuit 252 is insufficient, the oil enters the high-voltage accumulator 27 to store energy. When the oil pressure increases to a certain level, the pressure in the high-voltage accumulator 27 increases. When the force control valve opens, oil is output from the high-pressure accumulator 27 to drive the hydraulic motor 31. The second end of the high-pressure circuit 252 is connected to one end of the seventh pipe 259 and one end of the eighth pipe 2510. The other ends of the seventh pipe 259 and the eighth pipe 2510 are connected to the oil tank 24. A throttle valve 28 is installed on the eighth pipe 2510 to limit the medium pressure of the high-pressure circuit 252. An overflow valve 29 is installed on the seventh pipe 259 to unload the overload medium pressure of the high-pressure circuit 252. The pressurized medium in the high-pressure circuit 252 flows into the hydraulic motor 31 through the throttle valve 28.

[0036] Working principle of wave energy generation device based on hose-type hydraulic conversion system:

[0037] Initially, the entire device is mounted on the support frame 5, with the swing arm 13 extending outwards and the float 12 at its end floating on the sea surface at the middle water level. At this time, the turntable is vertically downward, and the scraper 22 is at the lowest point of the tank 21. Under the action of waves, the float 12 moves up and down with the waves, and the swing arm 13 swings back and forth around the axis. It also drives the scraper 22 to swing in an arc shape through the rotating shaft 11 and the central shaft 26 in sequence. The end of the scraper 22 makes a circular reciprocating motion, squeezing the hose and discharging the oil from the rubber hose 23. Figure 3 and Figure 4 As shown, when the scraper 22 rotates to the left, it squeezes the hose, and the oil is discharged from the first pipe 253 into the high-pressure circuit 252, and then enters the accumulator 27 for energy storage. After the pressure increases to a certain level, the pressure control valve of the accumulator 27 opens, and the oil passes through the throttle valve 28 to drive the hydraulic motor 31 to rotate, and then returns to the oil tank 24; the hydraulic motor 31 drives the generator 32 to generate electricity, and a vacuum is generated inside the hose on the right side of the scraper 22. The oil in the oil tank 24 is replenished into the rubber hose 23 through the low-pressure circuit 251 and the second pipe 254. Regardless of whether the turntable rotates to the left or right, the hydraulic circuit always maintains unidirectional flow. When the pressure in the hydraulic circuit is too high, the relief valve 29 opens, and the hydraulic oil returns directly to the oil tank 24 through the relief valve 29, protecting the hydraulic circuit from impact.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wave energy generation device based on a hose-type hydraulic conversion system, characterized in that: The system includes a capture system (1), a medium conversion system (2), a power generation system (3), and a support frame (5). The support frame (5) is fixedly installed on the shore base (4), and the capture system (1) is installed on the support frame (5). One end of the capture system (1) is set on the water surface, and the other end of the capture system (1) is fixedly connected to the medium conversion system (2). The capture system (1) is used to capture the potential energy of the water waves. The potential energy of the water waves is converted into medium energy through the medium conversion system (2), and the medium energy is converted into electricity through the power generation system (3). The power generation system (3) and the medium conversion system (2) are respectively fixedly installed on the support frame (5) or the shore base (4). The capture system (1) includes a pivot (11) and a float (12) installed at both ends of the swing arm (13). The float (12) floats on the water surface. One end of the swing arm (13) is rotatably connected to the support frame (5) through the pivot (11), and the rotating end is fixedly connected to one end of the pivot (11). The float (12) includes an integral floating upper part and a floating lower part. The floating upper part is a cylindrical structure, and the floating lower part is fixedly installed at the lower end of the floating upper part. The floating lower part is a conical or frustum structure. The media conversion system (2) includes a housing (21), a scraper (22), a rubber hose (23), an oil tank (24), and a media pipeline (25). The bottom of the housing (21) is an arc-shaped structure. The outer periphery of the rubber hose (23) is fixed along the inner wall of the arc-shaped structure. The middle part of the housing (21) is rotatably connected to a central shaft (26), and one end of the central shaft (26) is fixedly connected to one end of a rotating shaft (11). The scraper (22) is fixedly installed on the outer periphery of the central shaft (26). The float (12) moves up and down by water waves, and the up-and-down moving float (12) passes through a rocker arm and a rotating shaft (25) in sequence. 11) The central shaft (26) drives the scraper (22) to swing in an arc. One end of the arc-shaped scraper (22) is squeezed to the periphery of the rubber hose (23), and the rubber hose (23) is connected to the oil tank (24) through the medium pipeline (25). The oil tank (24) is located above the rubber hose (23). The oil tank (24) is filled with oil. The arc-shaped scraper (22) can drive the oil to move in the rubber hose (23) and the medium pipeline (25). A power generation system (3) is set on the medium pipeline (25). The displaced oil is converted into electricity through the power generation system (3). The medium pipeline (25) includes a low-pressure circuit (251), a high-pressure circuit (252), a first pipe body (253), a second pipe body (254), a third pipe body (255), a fourth pipe body (256), a fifth pipe body (257), and a sixth pipe body (258). One end of the first pipe body (253) is connected to one end of a rubber hose (23), and the other end of the first pipe body (253) is connected to one end of the third pipe body (255) and one end of the fourth pipe body (256). The other end of the third pipe body (255) is connected to the first end of the high-pressure circuit (252), and the other end of the fourth pipe body (256) is connected to the first end of the low-pressure circuit (251). The second ends of the high-pressure circuit (252) and the second ends of the low-pressure circuit (251) are connected to the oil tank (24). One end of the second pipe body (254) is connected to the other end of the rubber hose (23), and the other end of the second pipe body (254) is connected to the fifth pipe body (257). The first end of the pipe body (257) and the first end of the sixth pipe body (258), the second end of the fifth pipe body (257) are connected to the first end of the low-pressure circuit (251), and the second end of the sixth pipe body (258) is connected to the first end of the high-pressure circuit (252). A one-way valve is installed on each of the third pipe body (255), the fourth pipe body (256), the fifth pipe body (257), and the sixth pipe body (258). Oil flows sequentially through the first pipe body (253), the third pipe body (258), and the sixth pipe body (258). The pipe (255) is connected to the high-pressure circuit (252). The oil flows through the low-pressure circuit (251) and the fourth pipe (256) to the first pipe (253). The oil flows through the second pipe (254) and the sixth pipe (258) to the high-pressure circuit (252). The oil flows through the low-pressure circuit (251) and the fifth pipe (257) to the second pipe (254). A power generation system (3) is installed on the high-pressure circuit (252).

2. The wave energy generation device based on a hose-type hydraulic conversion system according to claim 1, characterized in that: The power generation system (3) includes a hydraulic motor (31) and a generator (32) installed at one end, with the hydraulic motor (31) installed on the high-voltage circuit (252).

3. The wave energy generation device based on a hose-type hydraulic conversion system according to claim 2, characterized in that: The second end of the high-pressure circuit (252) is connected to one end of the seventh pipe (259) and one end of the eighth pipe (2510), respectively. The other end of the seventh pipe (259) and the other end of the eighth pipe (2510) are connected to the oil tank (24), respectively. An overflow valve (29) is installed on the seventh pipe (259), and a throttle valve (28) is installed on the eighth pipe (2510). The pressurized medium in the high-pressure circuit (252) flows into the hydraulic motor (31) through the throttle valve (28).

4. The wave energy generation device based on a hose-type hydraulic conversion system according to claim 2, characterized in that: An energy storage device (27) is installed on the high-voltage circuit (252).

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