Underwater power generation device capable of recycling trailing vortex energy

Abstract

The invention relates to the technical field of underwater power generation, in particular to an underwater power generation device for recycling trailing vortex energy, which comprises a base, a bluff body power generation module is arranged on one side of the top surface of the base, a trailing vortex energy recycling module is arranged on the other side of the top surface of the base, and the bluff body power generation module and the trailing vortex energy recycling module are oppositely arranged. A cavity is formed in the base, a circuit system module is arranged in the cavity, and the circuit system module is electrically connected with the bluff body power generation module and the trailing vortex energy recovery module; the trailing vortex energy recovery module comprises a gear shaft arranged in the cavity, and a fish-shaped wake flow plate used for recovering vortex street energy generated when fluid passes through the bluff body power generation module is installed at the end, extending out of the cavity, of a shaft rod of the gear shaft. According to the invention, the bluff body power generation module can act to generate power through incoming flow; meanwhile, after the incoming flow flows through the bluff body power generation module, a large number of vortexes can be generated at the trailing vortex energy recovery module, and the trailing vortex energy recovery module acts to generate power through vortex force.

Description

Technical Field

[0001] This invention relates to the field of underwater power generation technology, and in particular to an underwater power generation device for recovering wake vortex energy. Background Technology

[0002] With the deepening of marine development and national defense construction, the demand for continuous power supply for underwater monitoring equipment, communication nodes, and deep-sea exploration devices is becoming increasingly urgent. Traditional power supply methods have significant limitations: cable power supply is limited by the wiring range, and underwater interfaces are prone to leakage and short circuits; battery packs have limited power output and require frequent salvage and replacement, severely restricting equipment endurance and operational efficiency. Therefore, developing efficient and autonomous underwater in-situ power generation technology has become a critical requirement.

[0003] The Kármán vortex street is a classic phenomenon in fluid mechanics, referring to the periodic shedding of two rows of vortices rotating in opposite directions on either side of a bluff body by a constant current. The energy contained within these vortices has long been overlooked. In engineering, vortex-induced vibrations caused by the Kármán vortex street are often considered destructive factors. Researchers frequently employ vortex guiding and breaking designs to mitigate their damage to structures such as offshore platforms, resulting in a significant waste of fluid kinetic energy. Currently, research on power generation based on the Kármán vortex street is primarily focused on wind power, with limited exploration of its application in underwater scenarios.

[0004] Most existing underwater vortex-induced vibration power generation devices neglect the large amount of vortex energy generated during the vibration of the device.

[0005] Bionic design is a method of solving engineering problems by imitating the behavior or structure of plants and animals in nature. Many organisms in nature have evolved efficient energy acquisition and utilization mechanisms in the process of adapting to their environment. For example, rainbow trout can swim upstream using the Karman vortex street even when dead. Furthermore, existing hydroelectric power generation equipment typically requires large dimensions, incurs high construction costs, and causes significant environmental disturbance, often negatively impacting native aquatic life; for instance, turbine blades can cause unavoidable damage and death to fish. By drawing inspiration from the principles of movement in natural organisms, it is possible to design efficient, low-cost, green, and eco-friendly energy conversion devices.

[0006] Therefore, there is an urgent need for an underwater power generation device that can recover the energy of the wake vortex, effectively improve the efficiency of underwater kinetic energy capture, solve the endurance bottleneck of traditional power supply methods, and provide stable and efficient energy support for underwater equipment. Summary of the Invention

[0007] The purpose of this invention is to provide an underwater power generation device that recovers wake vortex energy, so as to solve the problems existing in the prior art.

[0008] To achieve the above objectives, the present invention provides the following solution: an underwater power generation device for recovering wake vortex energy, comprising a base, a fluid-blocking power generation module disposed on one side of the top surface of the base, and a wake vortex energy recovery module disposed on the other side of the top surface of the base, the fluid-blocking power generation module and the wake vortex energy recovery module being disposed opposite to each other, a cavity being formed inside the base, and a circuit system module being disposed inside the cavity, the circuit system module being electrically connected to the fluid-blocking power generation module and the wake vortex energy recovery module; the wake vortex energy recovery module includes a gear shaft disposed in the cavity, and a fish-shaped wake plate for recovering the vortex energy generated by fluid passing through the fluid-blocking power generation module is installed on one end of the gear shaft extending outside the cavity.

[0009] Preferably, the gear of the gear shaft is disposed in the cavity, the gear of the gear shaft meshes with a driven gear, and the driven gear is driven to the output shaft of the rotor generator.

[0010] Preferably, the rotor generator is installed inside the cavity and is electrically connected to the circuit system module.

[0011] Preferably, the flow-blocking power generation module includes symmetrically arranged support rods, a connecting rod between the two support rods, permanent magnet crossbars at both ends of the connecting rods, and fixing elements fixedly connected to both ends of the permanent magnet crossbars.

[0012] Preferably, the fixing element is sleeved on the support rod and fixedly connected to the support rod.

[0013] Preferably, the two permanent magnet crossbars are arranged parallel to each other.

[0014] Preferably, each of the two permanent magnet crossbars is slidably connected to a sliding sleeve, and the connecting rod is fixedly connected between the two sliding sleeves.

[0015] Preferably, a flow-blocking fluid is sleeved on the connecting rod, and the flow-blocking fluid is fixedly connected to the connecting rod.

[0016] Preferably, at least one set of three-phase coils is provided on the permanent magnet crossbar, and the three-phase coils are disposed inside the sliding sleeve.

[0017] Preferably, the circuit system module includes a battery installed in the cavity, and the battery is electrically connected to the three-phase coil and the rotor generator.

[0018] The present invention discloses the following technical effects:

[0019] This invention enables the flow of water through the choke-flow power generation module to generate electricity. Simultaneously, as the flow passes through the choke-flow power generation module, it generates numerous vortices at the wake vortex energy recovery module. The vortex force causes the wake vortex energy recovery module to activate and generate electricity. Thus, this invention effectively improves the underwater kinetic energy capture efficiency by combining the flow through the choke-flow power generation module and the wake vortex energy recovery module. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a cross-sectional view of the sliding sleeve structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the flow-blocking power generation module of the present invention;

[0024] Figure 4 This is a cross-sectional view of the wake vortex energy recovery module of the present invention;

[0025] Figure 5 This is a schematic diagram of the working process of the present invention;

[0026] Among them, 1. flow obstruction; 2. sliding sleeve; 3. connecting rod; 4. permanent magnet crossbar; 5. support rod; 6. fixing element; 7. base; 8. fish-shaped wake plate; 9. gear shaft; 10. rotor generator; 11. driven gear; 12. rectifier; 13. filter; 14. voltage regulator; 15. storage battery; 16. A-phase coil; 17. B-phase coil; 18. C-phase coil. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] Reference Figures 1 to 5 This invention provides an underwater power generation device for recovering wake vortex energy, including a base 7. A fluid-blocking power generation module is disposed on one side of the top surface of the base 7, and a wake vortex energy recovery module is disposed on the other side of the top surface of the base 7. The fluid-blocking power generation module and the wake vortex energy recovery module are disposed opposite to each other. A cavity is formed inside the base 7, and a circuit system module is disposed inside the cavity. The circuit system module is electrically connected to the fluid-blocking power generation module and the wake vortex energy recovery module. The wake vortex energy recovery module includes a gear shaft 9 disposed inside the cavity. A fish-shaped wake plate 8 for recovering the vortex energy generated by the fluid passing through the fluid-blocking power generation module is installed on one end of the shaft of the gear shaft 9 that extends out of the cavity.

[0030] Gear shaft 9 is a combination of shaft and gear into one unit.

[0031] The fish-shaped wake 8 adopts a streamlined design that mimics the shape of a fish, achieving drag reduction and efficiency improvement.

[0032] This invention enables the flow of water through the choke-flow power generation module to generate electricity. Simultaneously, as the flow passes through the choke-flow power generation module, it generates numerous vortices at the wake vortex energy recovery module. The vortex force causes the wake vortex energy recovery module to activate and generate electricity. Thus, this invention effectively improves the underwater kinetic energy capture efficiency by combining the flow through the choke-flow power generation module and the wake vortex energy recovery module.

[0033] In a further optimized design, the gear of the gear shaft 9 is set inside the cavity, and the gear of the gear shaft 9 meshes with the driven gear 11, which is connected to the output shaft of the rotor generator 10.

[0034] A sealed bearing is installed at the position where the gear shaft 9 passes through the base 7, and one end of the gear shaft 9 that extends into the cavity is rotatably connected to the bottom of the cavity through the bearing.

[0035] Gear 11 can be connected to the output shaft of generator 10 via a fixed connection or a key connection.

[0036] The fish-shaped wake plate 8 drives the gear shaft 9 to rotate, the gear shaft 9 drives the driven gear 11 to rotate, and the driven gear 11 drives the output shaft of the rotor generator 10 to rotate, so that the rotor generator 10 generates electricity.

[0037] In a further optimized design, the rotor generator 10 is installed inside the cavity and electrically connected to the circuit system module.

[0038] The movement of the choke fluid power generation module generates a large number of vortices behind the module. The vortex force causes the fish-shaped wake plate 8 to rotate continuously, generating electricity through the principle of the rotor generator 10.

[0039] Further optimization of the scheme: the choke current power generation module includes symmetrically arranged support rods 5, a connecting rod 3 between the two support rods 5, permanent magnet crossbars 4 at both ends of the connecting rod 3, and fixing elements 6 fixedly connected to both ends of the permanent magnet crossbars 4.

[0040] The design was further optimized by mounting the fixing element 6 on the support rod 5 and fixing it to the support rod 5. The fixing element 6 limits the position of the connecting rod 3.

[0041] The design was further optimized by arranging the two permanent magnet crossbars 4 in parallel. The permanent magnet crossbars 4 employ a longitudinal magnetization method to arrange the permanent magnets inside the bars, thereby increasing the magnetic flux.

[0042] In a further optimized design, sliding sleeves 2 are slidably connected to both permanent magnet crossbars 4, and a connecting rod 3 is fixedly connected between the two sliding sleeves 2. The sliding sleeves 2 move along the permanent magnet crossbars 4.

[0043] In a further optimized design, a flow-blocking fluid 1 is fitted onto the connecting rod 3, and the flow-blocking fluid 1 is fixedly connected to the connecting rod 3. The flow-blocking fluid 1 drives the connecting rod 3 to move, and the connecting rod 3 drives the two sliding sleeves 2 to reciprocate along the permanent magnet crossbar 4.

[0044] The flow barrier 1 is a concave-back cylinder, with its concave surface facing the fish-shaped wake plate 8. The use of a concave-back cylinder in the flow barrier 1 achieves drag reduction and efficiency improvement; that is, the flow barrier 1 moves along... Figure 5 The motion direction shown is reciprocating.

[0045] Both the choke fluid 1 and the fish-shaped wake plate 8 are made of lightweight materials and are hollow inside. The ratio of the total length of the fish-shaped wake plate 8 to the diameter of the choke fluid 1 is 3:1. According to the position of the Karman vortex street, this ratio can better improve the efficiency of wake vortex energy recovery.

[0046] To further optimize the design, at least one set of three-phase coils is installed on the permanent magnet crossbar 4, and the three-phase coils are housed inside the sliding sleeve 2. The three-phase coils include phase A coil 16, phase B coil 17, and phase C coil 18, which are sequentially mounted on the permanent magnet crossbar 4; the number of three-phase coils can be increased or decreased according to actual conditions.

[0047] When the incoming flow passes through the obstruction fluid 1, alternating vortices will be generated on both sides of the obstruction fluid 1. The vortices on both sides will interact to form a periodic alternating transverse force of the Karman vortex street. This alternating transverse force will cause the obstruction fluid 1 to move laterally back and forth along the permanent magnet crossbar 4, generating electricity through the principle of a linear generator.

[0048] The circuit system module further optimizes the design by including a battery 15 installed in a cavity, which is electrically connected to a three-phase coil and a rotor generator 10.

[0049] The current from phase A coil 16, phase B coil 17, phase C coil 18, and rotor generator 10 passes through rectifier 12, filter 13, voltage regulator 14, and is electrically connected to battery 15.

[0050] Work process:

[0051] The base 7 is installed on the bottom of the riverbed or on a column in the water, so that the obstructing fluid 1 faces the direction of the incoming flow. The incoming flow will induce Karman vortex street vibration on the obstructing fluid 1. Since the permanent magnet crossbar 4 and the sliding sleeve 2 can slide relative to each other, the periodic vortex excitation force will cause the obstructing fluid 1 to move repeatedly along the permanent magnet crossbar 4, thereby driving the sliding sleeve 2 to slide on the permanent magnet crossbar 4. The sliding sleeve 2 with coils is equivalent to the mover of the linear generator, and the permanent magnet crossbar 4 is equivalent to the stator of the linear generator. The three-phase coil group inside the sliding sleeve 2 then cuts the magnetic field lines to generate alternating current. The wires of the two sliding sleeves 2 are connected to the circuit system module. The current is processed by the rectifier 12, filter 13, and voltage regulator 14 and then connected to the battery 15 for energy storage. At the same time, when the choke fluid 1 is forced to vibrate, a large number of vortex streets will be generated behind the choke fluid 1. The fish-shaped wake plate 8 behind it is affected by the falling vortex and drives the gear shaft 9 to rotate. The gear of the gear shaft 9 then meshes with the driven gear 11 on the output shaft of the rotor generator 10, thereby driving the rotor generator 10 to generate electricity. The rotor generator 10 stores the electrical energy in the battery 15 after it is processed by the rectifier 12, filter 13, and voltage regulator 14 through the wires.

[0052] This invention further enhances energy recovery through a wake vortex energy recovery module.

[0053] This invention achieves drag reduction and efficiency improvement by optimizing the shape of the flow-blocking fluid 1.

[0054] This invention achieves drag reduction and efficiency improvement through biomimetic design of a fish-shaped wake plate.

[0055] This invention adopts a modular design, which allows the choke current power generation module and the wake vortex energy recovery module to work independently, making maintenance and replacement relatively simple. This not only reduces the overall operation and maintenance costs, but also avoids large-scale shutdowns when equipment malfunctions. At the same time, it can be expanded and combined according to actual needs. For example, multiple power generation devices can be connected in parallel vertically or horizontally to form a large-scale power generation array, or applied individually to a small-scale energy supply.

[0056] 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.

[0057] 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. An underwater power generation device for recovering wake vortex energy, characterized in that: Includes a base (7), on one side of the top surface of the base (7) is a choke-flow power generation module, and on the other side of the top surface of the base (7) is a tail vortex energy recovery module. The choke-flow power generation module and the tail vortex energy recovery module are arranged opposite to each other. A cavity is opened in the base (7), and a circuit system module is arranged in the cavity. The circuit system module is electrically connected to the choke-flow power generation module and the tail vortex energy recovery module. The wake vortex energy recovery module includes a gear shaft (9) disposed in the cavity, and a fish-shaped wake plate (8) for recovering the vortex energy generated by the fluid passing through the fluid resistance power generation module is installed on one end of the shaft of the gear shaft (9) extending out of the cavity.

2. The underwater power generation device for recovering wake vortex energy according to claim 1, characterized in that: The gear of the gear shaft (9) is disposed in the cavity, and the gear of the gear shaft (9) meshes with a driven gear (11), which is connected to the output shaft of the rotor generator (10).

3. The underwater power generation device for recovering wake vortex energy according to claim 2, characterized in that: The rotor generator (10) is installed in the cavity and is electrically connected to the circuit system module.

4. The underwater power generation device for recovering wake vortex energy according to claim 3, characterized in that: The flow-blocking power generation module includes symmetrically arranged support rods (5), and a connecting rod (3) is provided between the two support rods (5). Permanent magnet crossbars (4) are respectively provided at both ends of the connecting rods (3), and fixing elements (6) are respectively fixedly connected to both ends of the permanent magnet crossbars (4).

5. The underwater power generation device for recovering wake vortex energy according to claim 4, characterized in that: The fixing element (6) is sleeved on the support rod (5) and fixedly connected to the support rod (5).

6. The underwater power generation device for recovering wake vortex energy according to claim 4, characterized in that: The two permanent magnet crossbars (4) are arranged parallel to each other.

7. The underwater power generation device for recovering wake vortex energy according to claim 4, characterized in that: Each of the two permanent magnet crossbars (4) is slidably connected to a sliding sleeve (2), and the connecting rod (3) is fixedly connected between the two sliding sleeves (2).

8. The underwater power generation device for recovering wake vortex energy according to claim 4, characterized in that: A flow barrier (1) is sleeved on the connecting rod (3), and the flow barrier (1) is fixedly connected to the connecting rod (3).

9. The underwater power generation device for recovering wake vortex energy according to claim 7, characterized in that: At least one set of three-phase coils is provided on the permanent magnet crossbar (4), and the three-phase coils are arranged inside the sliding sleeve (2).

10. The underwater power generation device for recovering wake vortex energy according to claim 9, characterized in that: The circuit system module includes a battery (15) installed in the cavity, which is electrically connected to the three-phase coil and the rotor generator (10).

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