Flow-induced vibration power generation device and power generation method

Abstract

The invention provides a flow-induced vibration power generation device and method, and the device comprises a mounting rack, a magnetostrictive displacement sensor is arranged on the mounting rack, linear sliding rails and linear guide rail generators are arranged on the two sides of the mounting rack, force transmission plates are arranged at the movable ends of the linear sliding rails, and a pressure plate is arranged at the top between the two force transmission plates. At least one hydraulic cylinder is arranged between the mounting frame and the pressure plates, a vibrator is arranged at the bottom between the two force transmission plates, and the adjusting mechanism comprises a driving assembly arranged on one pressure plate and a positioning assembly fixedly arranged on one force transmission plate. According to the flow-induced vibration generator, the vibration amplitude of the vibrator can be continuously monitored in the power generation process, the contact area of the vibrator and the fluid is adjusted based on monitoring data, and it can be guaranteed that the linear guide rail generator can be in an efficient power generation state; and the vibrator, the linear guide rail generator and the magnetostrictive displacement sensor can be prevented from being damaged, the service life of the device is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of marine new energy, and in particular to a flow-induced vibration power generation device and a power generation method. Background Art

[0002] In recent years, energy reserves have become a key issue affecting the development of various countries. Consequently, the development and utilization of alternative energy sources has become a hot topic in energy development worldwide. Among the many alternative energy sources, ocean current energy, with its large scale, widespread distribution, and abundant reserves, has attracted considerable attention from energy developers worldwide.

[0003] Flow-induced vibration (FIM) occurs when a fluid flows over the surface of a nonlinear object, generating alternating vortex discharges and periodic pulsating lift. If the nonlinear object is elastically supported, this produces periodic vibrations perpendicular to the direction of the flow, a phenomenon known as flow-induced motion (FIM). In engineering, FIM can exert alternating loads on structures, damaging their strength and shortening their service life. However, this vibration can also be effectively utilized by converting the mechanical energy generated by the vibration into electrical energy, leading to the development of flow-induced vibration generators.

[0004] Existing generators based on flow-induced vibration suffer significant power loss during power generation. This is primarily due to the need for an intermediate transmission structure. During this transmission process, the linear motion of the oscillator is first converted into rotational motion. This process involves friction between the gears, resulting in energy loss. Furthermore, because the flow of the fluid is uncontrollable, the oscillator used to generate the vibration is also difficult to control. If the fluid flow rate is too fast, the oscillator's vibration amplitude increases. When this exceeds a certain limit, it can easily damage the entire generator. Summary of the Invention

[0005] The first object of the present invention is to provide a flow-induced vibration power generation device to address the above-mentioned problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A flow-induced vibration power generation device includes a mounting frame, a magnetostrictive displacement sensor is provided on the mounting frame, linear slides and linear guide generators are provided on both sides of the mounting frame, a force transmission plate is provided at the movable end of the linear slide, a pressure plate is provided at the top between the two force transmission plates, at least one hydraulic cylinder is provided between the mounting frame and the pressure plate, a vibrator is provided at the bottom between the two force transmission plates, and an adjustment mechanism is also included, the adjustment mechanism including a driving assembly arranged on a pressure plate and a positioning assembly fixedly arranged on a force transmission plate.

[0008] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0009] As a preferred technical solution of the present invention: a wave plate is further provided above the vibrator between the two force transmission plates.

[0010] As a preferred technical solution of the present invention: a plurality of through holes are provided on the wave plate, and the plurality of through holes are distributed in a matrix.

[0011] As a preferred technical solution of the present invention: a central axis is provided in the middle of the vibrator.

[0012] As a preferred technical solution of the present invention: the cross section of the vibrator is triangular.

[0013] As a preferred technical solution of the present invention: the drive assembly includes at least one linear drive fixedly connected to the force transmission plate, the linear drives jointly drive the push plate, the push plate is connected to the adjusting motor, the adjusting motor is connected to the connecting disk, the connecting disk is coaxially fixedly connected to the central axis, and the axes of the linear drive, the adjusting motor and the central axis are parallel to each other.

[0014] As a preferred technical solution of the present invention: the positioning assembly includes a fixed disk fixedly connected to the force transmission plate and a rotating disk coaxially fixedly connected to the central axis, the central axis is arranged through the fixed disk, and the fixed disk is provided with a plurality of positioning holes evenly distributed along the circumferential direction of the central axis, and the rotating disk is fixed with a plurality of positioning columns evenly distributed along the circumferential direction of the central axis, and the positioning columns can be inserted into the positioning holes.

[0015] As a preferred technical solution of the present invention: a protective shell is provided on the outside of the driving assembly.

[0016] As a preferred technical solution of the present invention: a protective shell is provided on the outside of the positioning component.

[0017] The second object of the present invention is to provide a method for generating electricity using a flow-induced vibration power generation device.

[0018] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0019] A method for generating electricity using a flow-induced vibration power generation device, based on the flow-induced vibration power generation device described above, and comprising the following steps:

[0020] S1. Determine the installation position and installation direction of the device based on the flow direction of the fluid;

[0021] S2. Start the device, use the vibrator and the linear guide generator to output electrical energy, and use the magnetostrictive displacement sensor to monitor the vibration amplitude of the vibrator:

[0022] When the vibration amplitude of the vibrator exceeds a preset first threshold, the contact area between the vibrator and the fluid is reduced by the adjustment mechanism;

[0023] When the vibration amplitude of the vibrator is lower than a preset second threshold, the contact area between the vibrator and the fluid is increased by the adjustment mechanism;

[0024] The first threshold is not less than the second threshold.

[0025] The present invention provides a flow-induced vibration power generation device and a power generation method, which have the following beneficial effects: the flow-induced vibration generator of the present invention can continuously monitor the vibration amplitude of the vibrator during the power generation process, and adjust the contact area between the vibrator and the fluid based on the vibration amplitude obtained by monitoring, which can not only ensure that the linear guide generator can be in a state of high-efficiency power generation, but also avoid damage to the vibrator, the linear guide generator and the magnetostrictive displacement sensor, thereby extending the service life of the device and reducing the cost of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the flow-induced vibration power generation device provided by the present invention;

[0027] Figure 2 It is a schematic diagram of the vibrator setting method;

[0028] Figure 3 yes Figure 2 Enlarged view of part A;

[0029] Figure 4 It is a schematic diagram of the coordination between the oscillator and the central axis;

[0030] Figure 5 It is a structural diagram of the positioning component;

[0031] Figure 6 It is a structural diagram of the fixed disk;

[0032] In the figure: 1-mounting frame, 2-magnetic displacement sensor, 3-linear slide, 4-pressure plate, 5-force transmission plate, 6-hydraulic cylinder, 7-wave plate, 8-vibrator, 9-linear guide generator, 10-center axis, 11-protective cover, 12-rotating disk, 13-positioning column, 14-fixed disk, 15-connecting disk, 16-push rod, 17-adjusting motor, 18-push plate, 19-linear drive, 20-positioning hole. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-6As shown, a flow-induced vibration power generation device includes a mounting frame 1, a magnetostrictive displacement sensor 2 is provided on the mounting frame 1, linear slide rails 3 and linear guide generators 9 are provided on both sides of the mounting frame 1, a force transmission plate 5 is provided at the movable end of the linear slide rail 3, a pressure plate 4 is provided at the top between the two force transmission plates 5, at least one hydraulic cylinder 6 is provided between the mounting frame 1 and the pressure plate 4, a vibrator 8 is provided at the bottom between the two force transmission plates 5, and an adjustment mechanism is also included, which includes a driving component arranged on a pressure plate 4 and a positioning component fixedly arranged on a force transmission plate 5.

[0035] A wave plate 7 is further provided above the vibrator 8 between the two force transmission plates 5 .

[0036] A plurality of through holes are provided on the corrugated plate 7 and are distributed in a matrix.

[0037] A central axis 10 is provided through the middle of the vibrator 8 .

[0038] The vibrator 8 has a triangular cross section.

[0039] The drive assembly includes at least one linear drive 19 fixedly connected to the force transmission plate 5, and the linear drive 19 jointly drives the push plate 18, the push plate 18 is connected to the adjusting motor 17, the adjusting motor 17 is connected to the connecting disk 15, and the connecting disk 15 is coaxially fixedly connected to the central axis 10. The axes of the linear drive 19, the adjusting motor 17 and the central axis 10 are parallel to each other.

[0040] The positioning assembly includes a fixed disk 14 fixedly connected to the force transmission plate 5 and a rotating disk 12 coaxially fixedly connected to the central axis 10. The central axis 10 is arranged through the fixed disk 14. The fixed disk 14 is provided with a plurality of positioning holes 20 evenly distributed along the circumferential direction of the central axis 10. The rotating disk 12 is fixed with a plurality of positioning columns 13 evenly distributed along the circumferential direction of the central axis 10. The positioning columns 13 can be inserted into the positioning holes 20.

[0041] A protective shell 11 is provided on the outside of the driving assembly.

[0042] A protective shell 11 is provided on the outside of the positioning assembly.

[0043] The vibrator 8 is disposed in the fluid to contact the fluid and generate vibration.

[0044] The linear guide generator 9 is used to absorb the mechanical energy of the vibrator 8 and convert it into electrical energy. The power input end of the linear guide generator 9 is connected to the vibrator 8 .

[0045] The magnetostrictive displacement sensor 2 is used to sense the vibration amplitude of the vibrator 8 , and a sensing end of the magnetostrictive displacement sensor 2 is connected to the vibrator 8 .

[0046] The adjustment mechanism is used to adjust the contact area between the vibrator 8 and the fluid according to the vibration amplitude of the vibrator 8.

[0047] When generating electricity using the power generation device of the present invention, the entire device is first positioned in a fixed position, and the vibrator 8 is immersed in a fluid, such as a river or ocean. When the fluid impacts the vibrator 8, it causes the vibrator 8 to vibrate up and down. This vibration drives the power input end of the linear guide generator 9 to vibrate synchronously, thereby driving the linear guide generator 9 to convert the mechanical energy generated by the vibrator 8 during the vibration into electrical energy for external output. The linear reciprocating motion of the power input end of the linear guide generator 9, i.e., the sliding portion, matches the longitudinal reciprocating motion of the waves. Therefore, the linear guide generator 9 can directly generate thrust without any intermediate conversion device. Its movement can be achieved without mechanical contact, which not only prevents performance from being affected by wear of the transmission components, but also ensures operational reliability and improves the transmission efficiency of vibration. In addition, the linear guide generator 9 has a simple structure and good heat dissipation. The iron core is sealed as a whole, which also has good corrosion resistance and water resistance. On the other hand, the magnetostrictive displacement sensor 2 continuously monitors the vibration amplitude of the vibrator 8 during the vibration process of the vibrator 8 to determine whether the vibrator 8 is operating normally. If the data from the magnetostrictive displacement sensor 2 shows that the vibration amplitude of the vibrator 8 is too large, the vibrator 8 may be damaged, and the linear guide generator 9 may also be damaged. In this case, the vibrator 8 is adjusted using the adjustment mechanism to reduce the contact area between the vibrator 8 and the fluid, thereby reducing the vibration amplitude of the vibrator 8 and preventing damage to the vibrator 8 and the linear guide generator 9. If the data from the magnetostrictive displacement sensor 2 shows that the vibration amplitude of the vibrator 8 is too small, the power generation efficiency of the linear guide generator 9 may be too low. In this case, the vibrator 8 is adjusted using the adjustment mechanism to increase the contact area between the vibrator 8 and the fluid, thereby increasing the vibration amplitude of the vibrator 8 and maintaining the linear guide generator 9 in a state of high-efficiency power generation.

[0048] The flow-induced vibration generator of the present invention can continuously monitor the vibration amplitude of the vibrator 8 during the power generation process, and adjust the contact area between the vibrator 8 and the fluid based on the vibration amplitude obtained by monitoring. This can not only ensure that the linear guide generator 9 can be in a state of efficient power generation, but also avoid damage to the vibrator 8, the linear guide generator 9 and the magnetostrictive displacement sensor 2, thereby extending the service life of the device and reducing the cost of maintenance.

[0049] To facilitate installation of the device in a fixed position, the device also includes a mounting frame 1, on which the linear guide generator 9 and the magnetostrictive displacement sensor 2 are fixedly mounted. Two linear slide rails 3 are also fixedly mounted on the mounting frame 1. The linear slide rails 3 include a track and a sliding body slidingly mounted on the track. The two sliding bodies are each fixedly connected to a force transmission plate 5, and the two force transmission plates 5 are parallel to each other. The vibrator 8 is rotatably mounted between the two force transmission plates 5. The mounting frame 1 can be installed in a fixed position by bolting, riveting, or welding. The fixed position can be a foundation structure set at the edge of a river or ocean. The two force transmission plates 5 are used to connect the vibrator 8 to the mounting frame 1. The linear guide rails 3 are used to limit the movement direction of the force transmission plates 5, thereby limiting the vibration direction of the vibrator 8, ensuring that the vibrator 8 can only vibrate in the up and down directions, and that the contact area with the fluid can only be changed under the action of the adjustment mechanism.

[0050] Furthermore, a pressure plate 4 is fixedly connected between the two force transmission plates 5, and at least one hydraulic cylinder 6 is fixedly connected to the mounting frame 1, with the movable end of the hydraulic cylinder 6 fixedly connected to the pressure plate 4. The pressure plate 4 can be fixedly connected to both sliding bodies, which can be configured as linear bearings. The pressure plate 4 has mounting holes corresponding to the linear bearings. During the vibration process, the vibrator 8 drives the two force transmission plates 5 to vibrate synchronously, which in turn drives the pressure plate 4 to vibrate. The pressure plate 4 then drives the power input end of the linear guide generator 9 to operate, ensuring that all linear guide generators 9 operate synchronously, thereby outputting more uniform electrical energy. The hydraulic cylinder 6 is used to absorb a portion of the energy during the vibration of the vibrator 8 and then use this energy to reset the vibrator 8, ensuring that the vibrator 8 can continue to vibrate and preventing the vibrator 8 from remaining in a stable position, which would significantly reduce the power generation efficiency. Compared with the traditional method of using a spring to reset the vibrator 8, the hydraulic cylinder 6 has a faster response speed, thereby reducing energy loss during the intermediate transmission process and improving energy conversion efficiency. Considering that the hydraulic cylinder 6 also needs to be in continuous contact with the fluid, in order to prevent the hydraulic cylinder 6 from being damaged by rapid erosion, the hydraulic cylinder 6 can be set as a carbon fiber composite hydraulic cylinder, which is more corrosion-resistant and lighter.

[0051] A wave plate 7 is fixedly connected between the two force transmission plates 5. It is disposed in the fluid and positioned above the vibrator 8. The wave plate 7 comprises a plate body with a plurality of through-holes arranged in a matrix. As the vibrator 8 vibrates up and down, the wave plate 7 increases the vertical force exerted by the fluid on the vibrator 8, thereby increasing the vibration amplitude of the vibrator 8, thereby providing the vibrator 8 with more mechanical energy and ultimately improving power generation efficiency. This effect is more pronounced at lower fluid flow rates.

[0052] The specific setting method of the vibrator 8 is as follows: a central shaft 10 is rotatably connected between the two force transmission plates 5, and the two ends of the central shaft 10 pass through the two force transmission plates 5 respectively. The vibrator 8 is fixedly mounted on the central shaft 10. The cross-section of the vibrator 8 is triangular, and the central shaft 10 is located at the center of the triangle. The adjustment mechanism includes a driving component fixedly arranged on one of the pressure plates 4 and a positioning component fixedly arranged on the other force transmission plate 5. The driving component is used to drive the central shaft 10 to rotate, and the positioning component is used to fix the central shaft 10. When it is necessary to use the adjustment mechanism to adjust the contact area between the vibrator 8 and the fluid, it is only necessary to drive the central shaft 10 to rotate to drive the vibrator 8 to rotate, thereby achieving the effect of changing the contact area between the vibrator 8 and the fluid, which is simple and convenient. The driving component is used to drive the central shaft 10 to rotate. After the central shaft 10 rotates to the appropriate direction, the central shaft 10 is locked by the positioning mechanism to fix the contact area between the vibrator 8 and the fluid.

[0053] The specific structure of the drive assembly is as follows: the drive assembly includes at least one linear drive 19 fixedly connected to the force transmission plate 5, and all linear drives 19 are commonly driven to connect to the push plate 18, which is fixedly connected to the adjustment motor 17, which is driven to connect to the connecting disk 15, which is coaxially fixedly connected to the central shaft 10, and the axes of the linear drive 19, the adjustment motor 17 and the central shaft 10 are all parallel to each other. When it is necessary to drive the central shaft 10 to rotate to change the contact area between the vibrator 8 and the fluid, the linear drive 19 is first used to drive the push plate 18 to move, and then the push plate 18 drives the adjustment motor 17, the connecting disk 15 and the central shaft 10 to move synchronously, so that the central shaft 10 moves toward the other force transmission plate 5 until the locking state of the positioning assembly is released, and the central shaft 10 can be released. Then the adjustment motor 10 is started, and the adjustment motor 17 drives the central shaft 10 to rotate, and then the central shaft 10 drives the vibrator 8 to rotate. After the vibrator 8 rotates to the appropriate position, the adjusting motor 17 stops, the linear drive 19 reverses, resets the central shaft 10 and the vibrator 8, and re-locks the central shaft 10 using the positioning assembly. The drive assembly mainly uses the adjusting motor 17 to drive the central shaft 10 to rotate, does not require a complex transmission structure, and is easy to control. During the vibration process of the vibrator 8, the force generated is borne by the force transmission plate 5, and does not directly act on the output shaft of the adjusting motor 17, which can protect the adjusting motor 17. In order to further protect the adjusting motor 17 and avoid all the resistance in the process of pushing the central shaft 10 to move acting on the output shaft of the adjusting motor 17, a plurality of push rods 16 evenly distributed along the circumferential direction of the adjusting motor 17 and parallel to the axis of the adjusting motor 17 can be fixed on the push plate 18. The push rods 16 are used to push the connecting disk 15 to move, thereby pushing the central shaft 10 to move.

[0054] The specific structure of the positioning assembly is as follows: the positioning assembly includes a fixed disk 14 fixedly connected to the force transmission plate 5 and a rotating disk 12 coaxially fixedly connected to the central axis 10, and the central axis 10 passes through the fixed disk 14, and the fixed disk 14 is provided with a plurality of positioning holes 20 evenly distributed along the circumferential direction of the central axis 10, and the rotating disk 12 is fixedly connected with a plurality of positioning columns 13 evenly distributed along the circumferential direction of the central axis 10, and the positioning columns 13 can be inserted into the positioning holes 20. When the vibrator 8 needs to be locked, the central shaft 10 is moved so that the rotating disk 12 moves with the central shaft 10 until the positioning posts 13 are correspondingly inserted into the positioning holes 20. The fixed disk 14 can then be used to cooperate with the positioning posts 13 to lock the rotating disk 12, thereby locking the central shaft 10 and the vibrator 8. When the contact area between the vibrator 8 and the fluid needs to be adjusted, the linear actuator 19 drives the central shaft 10 to move, thereby driving the rotating disk 12 to move. During the movement of the rotating disk 12, the positioning posts 13 are pulled out of the positioning holes 20. When all the positioning posts 13 are out of the positioning holes 20, the rotating disk 12 is released, and the adjustment motor 17 can drive the central shaft 10 to rotate, thereby driving the vibrator 8 to rotate, ultimately achieving the effect of changing the contact area between the vibrator 8 and the fluid. The more positioning posts 13 and positioning holes 20 there are, the more angles of the central shaft 10 can be fixed, and the higher the adjustment accuracy of the vibrator 8. To facilitate the alignment of the positioning posts 13 and the positioning holes 20, the adjustment motor 17 can be set as a stepper motor.

[0055] By cooperating with the drive and positioning assemblies, the contact area between the vibrator 9 and the fluid can be adjusted simply by controlling the linear actuator 19 and the adjustment motor 17. This simplifies the overall structure and control process. To fully protect the drive and positioning assemblies from fluid erosion, each of the two force transmission plates 5 is fixedly connected to a protective cover 11, and the drive and positioning assemblies are correspondingly disposed within the protective covers 11.

[0056] Specifically, the power generation method of the flow-induced vibration power generation device is implemented by the following steps:

[0057] S1. Determine the installation location and orientation of the device based on the fluid flow direction. It is best to select a fluid with a relatively stable flow direction to achieve higher power generation efficiency. Alternatively, a basic structure capable of adjusting the overall orientation of the device can be installed at the location of the device. This allows the device to be adjusted based on the fluid flow direction, ensuring that the vibrator 8 remains perpendicular to the fluid flow, thereby ensuring power generation efficiency.

[0058] S2. Start the device, use the vibrator 8 and the linear guide generator 9 to output electrical energy, and use the magnetostrictive displacement sensor 2 to monitor the vibration amplitude of the vibrator 8:

[0059] When the vibration amplitude of the vibrator 8 exceeds a preset first threshold, the adjustment mechanism is used to reduce the contact area between the vibrator 8 and the fluid to avoid damage to the vibrator 8, the linear guide generator 9 and the magnetostrictive displacement sensor 2 due to excessive vibration amplitude of the vibrator 8;

[0060] When the vibration amplitude of the vibrator 8 is lower than a preset second threshold, the adjustment mechanism is used to increase the contact area between the vibrator 8 and the fluid to improve the power generation efficiency of the device.

[0061] Obviously, the first threshold is greater than the second threshold.

[0062] The above-mentioned specific implementation methods are used to illustrate the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the scope of protection of the claims shall fall within the scope of protection of the present invention.

Claims

1. A flow-induced vibration power generation device, characterized in that: The invention comprises a mounting frame (1), wherein a magnetostrictive displacement sensor (2) is provided on the mounting frame (1), linear slide rails (3) and linear guide generators (9) are provided on both sides of the mounting frame (1), a force transmission plate (5) is provided at the movable end of the linear slide rail (3), a pressure plate (4) is provided at the top between the two force transmission plates (5), at least one hydraulic cylinder (6) is provided between the mounting frame (1) and the pressure plate (4), a vibrator (8) is provided at the bottom between the two force transmission plates (5), and an adjustment mechanism is also included, wherein the adjustment mechanism comprises a driving component provided on one pressure plate (4) and a positioning component fixedly provided on one force transmission plate (5).

2. The flow-induced vibration power generation device according to claim 1, characterized in that: A wave plate (7) is further provided above the vibrator (8) between the two force transmission plates (5).

3. The flow-induced vibration power generation device according to claim 2, characterized in that: The wave plate (7) is provided with a plurality of through holes, and the plurality of through holes are distributed in a matrix.

4. The flow-induced vibration power generation device according to claim 1, wherein: A central axis (10) is provided in the middle of the vibrator (8).

5. The flow-induced vibration power generation device according to claim 1, characterized in that: The cross section of the vibrator (8) is triangular.

6. The flow-induced vibration power generation device according to claim 1 or 4, characterized in that: The drive assembly includes at least one linear drive (19) fixedly connected to the force transmission plate (5), the linear drive (19) jointly drives the push plate (18), the push plate (18) is connected to the adjustment motor (17), the adjustment motor (17) is connected to the connecting disk (15), the connecting disk (15) is coaxially fixedly connected to the central axis (10), and the axes of the linear drive (19), the adjustment motor (17) and the central axis (10) are parallel to each other.

7. The flow-induced vibration power generation device according to claim 1 or 4, characterized in that: The positioning assembly comprises a fixed disk (14) fixedly connected to the force transmission plate (5) and a rotating disk (12) coaxially fixedly connected to the central axis (10), wherein the central axis (10) passes through the fixed disk (14), and the fixed disk (14) is provided with a plurality of positioning holes (20) uniformly distributed along the circumferential direction of the central axis (10), and the rotating disk (12) is fixed with a plurality of positioning posts (13) uniformly distributed along the circumferential direction of the central axis (10), and the positioning posts (13) can be inserted into the positioning holes (20).

8. The flow-induced vibration power generation device according to claim 1, characterized in that: A protective shell (11) is provided on the outside of the driving assembly.

9. The flow-induced vibration power generation device according to claim 1, characterized in that: A protective shell (11) is provided on the outside of the positioning component.

10. A method for generating electricity using a flow-induced vibration power generation device, characterized in that: The method is based on the flow-induced vibration power generation device according to any one of claims 1 to 9, and comprises the following steps: S1. Determine the installation position and installation direction of the device based on the flow direction of the fluid; S2, starting the device, using the vibrator (8) and the linear guide generator (9) to output electric energy, and using the magnetostrictive displacement sensor (2) to monitor the vibration amplitude of the vibrator (8): When the vibration amplitude of the vibrator (8) exceeds a preset first threshold, the contact area between the vibrator (8) and the fluid is reduced by using an adjustment mechanism; When the vibration amplitude of the vibrator (8) is lower than a preset second threshold value, the contact area between the vibrator (8) and the fluid is increased by using the adjustment mechanism; The first threshold is not less than the second threshold.

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