Wave energy conversion device

Abstract

The application discloses a wave energy conversion and trapping device, and belongs to a kind of offshore power generation device, including float, shell, conversion device and power generation device;The bottom of the conversion device is provided with power generation device;Conversion device and power generation device outside are provided with shell;The top of the shell is provided with opening;The top of the conversion device is connected with float through the opening;The conversion device is used for converting the vertical movement of wave into mechanical unidirectional rotary motion;The power generation device is used for converting mechanical energy into electrical energy.The wave energy conversion and trapping device of the application converts the vertical reciprocating motion of the float into the unidirectional rotary motion of the inner shaft, and applies the rotary motion of the inner shaft to the permanent magnet electromagnetic induction power generation, efficiently converts mechanical energy into electrical energy, has simple structure, less limited scenes, and can be applied to more extensive environment and terrain.

Description

Technical Field

[0001] This invention pertains to an offshore power generation device, specifically a wave energy conversion and energy harvesting device. Background Technology

[0002] In recent years, with the rapid development of the economy and society, the greenhouse effect and increasingly severe environmental pollution caused by traditional non-renewable energy sources, especially oil, have attracted widespread attention. People have increasingly recognized the importance of renewable energy, and the development and utilization of renewable energy has become one of the global focuses.

[0003] Oceans cover 70% of the Earth's surface and are rich in energy resources, especially renewable resources, with enormous development potential, including wave energy, wind energy, solar energy, tidal energy, and thermal energy. Wave energy, in particular, refers to the kinetic and potential energy of ocean surface waves. It is a clean and renewable energy source because it is not limited by weather, climate, or seasons, and is ubiquitous in the ocean. Increasingly, researchers are focusing on ocean wave energy, promoting its development and research. However, existing wave energy conversion devices have some problems: First, some devices only utilize the wave's motion without modifying it, such as direct-drive wave energy conversion devices and Archimedes wave pendulums. Their generator operation is limited by the vertical or horizontal motion of the waves, resulting in low power generation efficiency. Second, some devices rely on the shore; devices fixed to the shore are limited by the terrain and cannot fully utilize wave energy. For example, patent authorization announcement number CN202364009U discloses a low-speed direct-drive wave generator. This generator operates in a low-speed permanent magnet mode, which can eliminate the need for a speed increaser and directly connect to the speed commutation device, simplifying the system structure, improving system efficiency, reducing system failure rate, reducing system size, and lowering system cost.

[0004] The aforementioned low-speed direct-drive wave generators still operate under conditions limited by the vertical or horizontal movement of waves, resulting in low power generation efficiency. Their systems are also complex, and the motors are relatively large, limiting their installation locations in the ocean. These are all problems that urgently need to be solved. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings by providing a wave energy conversion and harvesting device. This device aims to solve the problem of how to more efficiently convert wave energy into electrical energy, adapt to wave motion patterns, have a simple structure, and be unrestricted by coastal environments and terrain. To achieve the above objective, this invention provides the following technical solution:

[0006] A wave energy conversion and harvesting device includes a float, a shell, a conversion device, and a power generation device; the power generation device is located at the bottom of the conversion device; the conversion device and the power generation device are covered by a shell; the top of the shell has an opening; the top of the conversion device is connected to the float through the opening; the conversion device is used to convert the vertical motion of the wave into unidirectional mechanical rotational motion; the power generation device is used to convert mechanical energy into electrical energy.

[0007] Furthermore, the conversion device includes an outer shaft and an inner shaft; the inner shaft is fitted with an outer shaft; the top of the outer shaft is provided with a first thread; the bottom of the float is provided with a first threaded hole that mates with the first thread.

[0008] Furthermore, the outer wall of the outer shaft is provided with at least one first guide block; the inner wall of the outer shell is provided with a first guide groove in the vertical direction to cooperate with the first guide block; the inner wall of the inner shaft portion is provided with a second guide block; the outer wall of the inner shaft is provided with a second guide groove in the circumferential direction to cooperate with the second guide block; when the second guide block moves in the second guide groove, it drives the inner shaft to rotate.

[0009] Furthermore, the power generation device includes a rotor shaft, several N-pole magnets, several S-pole magnets, and several coils; the N-pole magnets and S-pole magnets are alternately arranged on the outer wall of the rotor shaft circumferentially; the outer casing is provided with coils circumferentially on the inner wall of the rotor shaft corresponding to the outer wall of the rotor shaft.

[0010] Furthermore, the bottom of the inner shaft is provided with a second thread; the top of the rotor shaft is provided with a second threaded hole that mates with the second thread; a bearing is provided between the inner shaft and the rotor shaft; the inner ring of the bearing is fixed to the inner shaft, and the outer ring is fixed to the outer shell.

[0011] Furthermore, a storage battery is connected to the bottom of the power generation device.

[0012] Furthermore, the bottom of the outer casing is provided with a bottom cover; the bottom cover is provided with a lock hole.

[0013] The beneficial effects of this invention are:

[0014] This invention discloses a wave energy conversion and harvesting device, belonging to a type of marine power generation device, comprising a float, a shell, a conversion device, and a power generation device; the power generation device is located at the bottom of the conversion device; the conversion device and the power generation device are encased in a shell; the top of the shell has an opening; the top of the conversion device is connected to the float through the opening; the conversion device is used to convert the vertical motion of the waves into unidirectional mechanical rotational motion; the power generation device is used to convert mechanical energy into electrical energy. This wave energy conversion and harvesting device converts the vertical reciprocating motion of the float into unidirectional rotational motion of an inner axis, and applies the rotational motion of the inner axis to electromagnetic induction power generation using a permanent magnet, efficiently converting mechanical energy into electrical energy. It has a simple structure, few limitations in application scenarios, and can be applied to a wider range of environments and terrains. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a disassembled three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This is a three-dimensional structural schematic diagram of the first guide groove of the present invention;

[0019] Figure 5 This is a schematic diagram of the inner shaft three-dimensional structure of the present invention;

[0020] Figure 6 This is a schematic diagram of the unfolded structure of the inner shaft outer wall of the present invention;

[0021] In the attached diagram: 1-float, 2-outer shell, 3-conversion device, 4-generator, 5-opening, 6-outer shaft, 7-inner shaft, 8-first thread, 9-first threaded hole, 10-first guide block, 11-first guide groove, 12-second guide block, 13-second guide groove, 14-rotor shaft, 15-N pole magnet, 16-S pole magnet, 17-coil, 18-second thread, 19-second threaded hole, 20-bearing, 21-battery, 22-bottom cover, 23-lock hole. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0023] Example 1:

[0024] See attached Figures 1-6A wave energy conversion and harvesting device includes a float 1, a shell 2, a conversion device 3, and a power generation device 4. The power generation device 4 is located at the bottom of the conversion device 3. The shell 2 covers the conversion device 3 and the power generation device 4. The top of the shell 2 has an opening 5. The float 1 is connected to the top of the conversion device 3 through the opening 5. The conversion device 3 is used to convert the vertical motion of the wave into a unidirectional mechanical rotational motion. The power generation device 4 is used to convert mechanical energy into electrical energy. As can be seen from the above structure, a wave energy conversion and harvesting device includes a float 1, a shell 2, a conversion device 3, and a power generation device 4. The power generation device 4 is connected to the bottom of the conversion device 3. The conversion device 3 and the power generation device 4 are enclosed by the shell 2. The top of the shell 2 has an opening 5 through which the conversion device 3 is connected to the float 1. The position of the shell 2 relative to the sea surface is fixed. When float 1 floats on the sea surface, it moves vertically up and down with the waves. Since float 1 is connected to conversion device 3, conversion device 3 moves with float 1, converting the vertical motion of the waves into unidirectional mechanical rotation. Power generation device 4 uses this rotation to generate electricity, converting mechanical energy into electrical energy. This invention provides a wave energy conversion and harvesting device that can convert the vertical reciprocating motion of float 1 into unidirectional mechanical rotation, and apply this rotation to permanent magnet electromagnetic induction power generation, efficiently converting mechanical energy into electrical energy. It has a simple structure, few limitations in application scenarios, and is applicable to a wider range of environments and terrains.

[0025] Example 2:

[0026] See attached Figures 1-6 Based on Embodiment 1, the conversion device 3 includes an outer shaft 6 and an inner shaft 7; the inner shaft 7 is fitted with the outer shaft 6; the top of the outer shaft 6 is provided with a first thread 8; the bottom of the float 1 is provided with a first threaded hole 9 that mates with the first thread 8. From the above structure, it can be seen that the conversion device 3 includes an outer shaft 6 and an inner shaft 7, both of which are cylindrical. The radius of the upper cylindrical portion of the outer shaft 6 is smaller than the radius of the lower cylindrical portion, and the size of the upper cylindrical portion of the outer shaft 6 is the same as the size of the opening 5 at the top of the outer shell 2, so that the upper portion of the outer shaft 6 can just pass through the opening 5 at the top of the outer shell 2; the lower cylindrical portion of the outer shaft 6 is a cavity, and the inner shaft 7 is located inside the cavity. The top of the upper portion of the outer shaft 6 is provided with the first thread 8, and the bottom of the float 1 is provided with a first threaded hole 9 that mates with the first thread 8. The upper portion of the outer shaft 6 passes through the opening 5 at the top of the outer shell 2 and connects to the float 1. When the float 1 moves with the waves, the outer shaft 6 and the inner shaft 7 also move accordingly.

[0027] The outer wall of the outer shaft 6 is provided with at least one first guide block 10; the inner wall of the outer shell 2 is provided with a first guide groove 11 in the vertical direction to cooperate with the first guide block 10; the inner wall of the inner shaft 7 portion inside the outer shaft 6 is provided with a second guide block 12; the outer wall of the inner shaft 7 is provided with a second guide groove 13 in the circumferential direction to cooperate with the second guide block 12; when the second guide block 12 moves in the second guide groove 13, it drives the inner shaft 7 to rotate. From the above structure, it can be seen that the inner wall of the outer shell 2 is provided with a first guide groove 11 in the vertical direction, and two symmetrical arc-shaped protrusions are provided on the inner wall of the outer shell 2. The starting ends of the two arc-shaped protrusions respectively form two corresponding first guide grooves 11, and the first guide grooves 11 are straight in the vertical direction. At least one first guide block 10 is provided on the lower outer wall of the outer shaft 6, corresponding to the position of the first guide groove 11. There can be two first guide blocks 10, symmetrically arranged on the outer wall of the outer shaft 6. The two first guide blocks 10 can slide within their corresponding first guide grooves 11. Thus, when the float 1 moves with the waves, causing the outer shaft 6 to move, the outer shaft 6 can only move vertically relative to the outer shell 2. A second guide block 12 is provided on the inner wall of the cavity portion of the outer shaft 6. A hole can be opened in the cavity, through which the second guide block 12 can be detachably connected to the cavity wall of the outer shaft 6, facilitating its installation and removal. A second guide groove 13 is provided circumferentially on the outer wall of the inner shaft 7. The position of the second guide groove 13 is such that it can cooperate with the second guide block 12, allowing the second guide block 12 to slide within the second guide groove 13. The trajectory of the second guide groove 13 around the outer wall of the inner shaft 7 has a specific shape, such as... Figure 6 As shown. When the second guide block 12 reciprocates vertically relative to the outer shell 2 with the outer shaft 6, the second guide slides within the second guide groove 13, causing the inner shaft 7 to rotate around its central axis. Thus, when the float 1 moves with the waves, causing the outer shaft 6 to move, due to the restriction of the first guide groove 11 on the outer shell 2, the outer shaft 6 can only move vertically within the outer shell 2. At the same time, the second guide block 12 moves vertically as well. At this time, due to the cooperation of the second guide block 12 and the second guide groove 13, the inner shaft 7 is driven to rotate around its central axis. In this way, through the float 1, the outer shell 2, the inner shaft 7, and the outer shaft 6, the motion of the waves is converted into the rotational motion of the inner shaft 7.

[0028] The power generation device 4 includes a rotor shaft 14, several N-pole magnets 15, several S-pole magnets 16, and several coils 17. The N-pole magnets 15 and S-pole magnets 16 are alternately arranged on the outer wall of the rotor shaft 14 circumferentially. The outer casing 2 is provided with coils 17 circumferentially on the inner wall of the rotor shaft 14 corresponding to the outer wall of the rotor shaft 14. As can be seen from the above structure, the power generation device 4 includes a rotor shaft 14, several N-pole magnets 15, several S-pole magnets 16, and several coils 17. Preferably, there are 10 N-pole magnets 15, 11 S-pole magnets 16, and 12 equidistantly arranged coils 17. The N-pole magnets 15 and S-pole magnets 16 are alternately arranged on the outer wall of the rotor shaft 14 to form a magnet, and the coils 17 are arranged on the inner wall of the outer casing 2 corresponding to the inner wall of the rotor shaft 14, so that the rotor shaft 14 and the coils 17 are coaxial. When the rotor shaft 14 rotates around its axis, it drives the magnetic array formed by the N-pole magnet 15 and the S-pole magnet 16 on the rotor shaft 14 to cut the coil 17 array on the outer casing 2, thereby generating electrical energy. The power generation device 4 of the present invention uses a permanent magnet electromagnetic induction generator with fixed coils 17 and rotating magnets, which reduces the size and overall weight of the power generation device 4 and provides higher mechanical stability. The alternating arrangement of the N-pole magnet 15 and the S-pole magnet 16 can generate a larger induced electromotive force, thereby improving the efficiency of energy conversion.

[0029] The inner shaft 7 has a second thread 18 at its bottom; the rotor shaft 14 has a second threaded hole 19 at its top that mates with the second thread 18; a bearing 20 is provided between the inner shaft 7 and the rotor shaft 14; the inner ring of the bearing 20 is fixed to the inner shaft 7, and the outer ring is fixed to the outer casing 2. As can be seen from the above structure, the rotor shaft 14 and the inner shaft 7 are connected by threads. When the inner shaft 7 rotates around its center, it drives the rotor shaft 14 to rotate as well. At this time, the magnetic array on the rotor shaft 14 cuts the coil 17 array on the outer casing 2 to generate electricity. The bearing 20 is provided between the inner shaft 7 and the rotor shaft 14. The thread at the bottom of the inner shaft 7 passes through the bearing 20 and connects to the rotor shaft 14. The inner ring of the bearing 20 is fixed to the inner shaft 7 and can rotate with both the inner shaft 7 and the rotor shaft 14. The inner wall of the outer casing 2 has a support groove corresponding to the position of the bearing 20 to support the bearing 20, and the outer ring of the bearing 20 is fixed to the inner wall of the outer casing 2. Bearing 20 is mainly used to support the outer shaft 6 and the rotor shaft 14, reducing the coefficient of friction during their movement and ensuring their rotational accuracy.

[0030] Example 3:

[0031] See attached Figures 1-6 Based on Embodiment 2, a storage battery 21 is connected to the bottom of the power generation device 4. As can be seen from the above structure, the electrical energy generated by the power generation device 4 can be stored in the storage battery 21 connected to the power generation device 4.

[0032] The bottom of the outer shell 2 is provided with a bottom cover 22; the bottom cover 22 is provided with a lock hole 23. As can be seen from the above structure, the bottom of the outer shell 2 is provided with a bottom cover 22 to facilitate the assembly and disassembly of various components. The bottom cover 22 is provided with a lock hole 23, and a chain passes through the lock hole 23 to connect to the seabed, so that the position of the outer shell 2 is fixed relative to the sea level.

[0033] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A wave energy conversion and energy harvesting device, characterized in that: The device includes a float (1), a shell (2), a conversion device (3), and a power generation device (4); the conversion device (3) has a power generation device (4) at its bottom; the conversion device (3) and the power generation device (4) are fitted with a shell (2); the shell (2) has an opening (5) at its top; the top of the conversion device (3) is connected to the float (1) through the opening (5); the conversion device (3) is used to convert the vertical motion of the waves into unidirectional mechanical rotational motion; the power generation device (4) is used to convert mechanical energy into electrical energy; the conversion device (3) includes an outer shaft (6) and an inner shaft (7); the inner shaft (7) is fitted with the outer shaft (6); the top of the outer shaft (6) has a first thread (8); the bottom of the float (1) has a first thread that mates with the first thread (8). Threaded hole (9); the outer wall of the outer shaft (6) is provided with at least one first guide block (10); the inner wall of the outer shell (2) is provided with a first guide groove (11) that matches the first guide block (10) in the vertical direction; the inner wall of the outer shaft (6) containing the inner shaft (7) is provided with a second guide block (12); the outer wall of the inner shaft (7) is provided with a second guide groove (13) that matches the second guide block (12) in the circumferential direction; when the second guide block (12) moves in the second guide groove (13), it drives the inner shaft (7) to rotate; when the second guide block (12) moves with the outer shaft (6) relative to the outer shell (2) in the vertical direction, the second guide block (12) slides in the second guide groove (13), driving the inner shaft (7) to rotate around the central axis of the inner shaft (7).

2. The wave energy conversion and energy harvesting device according to claim 1, characterized in that: The power generation device (4) includes a rotor shaft (14), a plurality of N-pole magnets (15), a plurality of S-pole magnets (16) and a plurality of coils (17); the N-pole magnets (15) and S-pole magnets (16) are alternately arranged on the outer wall of the rotor shaft (14) circumferentially; the outer casing (2) is provided with coils (17) circumferentially on the inner wall of the rotor shaft (14) corresponding to the rotor shaft (14).

3. The wave energy conversion and energy harvesting device according to claim 2, characterized in that: The inner shaft (7) has a second thread (18) at its bottom; the rotor shaft (14) has a second threaded hole (19) at its top that mates with the second thread (18); a bearing (20) is provided between the inner shaft (7) and the rotor shaft (14); the inner ring of the bearing (20) is fixed on the inner shaft (7), and the outer ring is fixed on the outer shell (2).

4. A wave energy conversion and energy harvesting device according to claims 1-3, characterized in that: The bottom of the power generation device (4) is connected to a storage battery (21).

5. A wave energy conversion and energy harvesting device according to claim 1, characterized in that: The bottom of the outer shell (2) is provided with a bottom cover (22); the bottom cover (22) is provided with a lock hole (23).

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