A stable multi-oscillator induced current-induced vibration power generation device and power generation method

Abstract

A highly stable multi-oscillator linked flow-induced vibration power generation device includes multiple sets of power generation mechanisms distributed along a first direction, with at least two mechanisms in each set. The mechanisms within the same set are distributed along a second direction, perpendicular to the first direction. Each power generation mechanism includes a top-closed mounting cylinder containing a linear generator. The power input axis of the linear generator extends downwards and is fixedly connected to a lifting plate. A transmission rod is rotatably connected to the lower surface of the lifting plate, and an oscillator is fixedly connected to the lower end of the transmission rod. The oscillator is parallel to the fluid surface and immersed in the fluid. This invention provides a highly stable multi-oscillator linked flow-induced vibration power generation device and method. It can adjust the oscillator according to the fluid flow velocity, avoiding excessively high vibration amplitude and frequency when the fluid flow velocity is too high by changing the oscillator's water-facing area, thus protecting the oscillator and other structures.

Description

Technical Field

[0001] This invention relates to the field of flow-induced vibration power generation technology, specifically to a highly stable multi-oscillator linked flow-induced vibration power generation device and power generation method. Background Technology

[0002] Flow-induced motion (FIM) is a phenomenon where fluid flowing over the surface of a nonlinear object generates alternating vortices on both sides, producing periodic pulsating lift. If the nonlinear object is elastically supported, it will vibrate periodically perpendicular to the direction of the incoming flow. In engineering, FIM can impose alternating loads on structures, weakening their strength and shortening their lifespan. However, it can also be utilized to convert the mechanical energy generated by this vibration into electrical energy, thus continuously generating electricity.

[0003] In existing technologies, flow-induced vibration power generation devices require an oscillator placed within a fluid. The oscillator vibrates under the influence of the fluid, driving a generator to convert its kinetic energy into electrical energy. However, the fluid velocity is not constant. A sudden increase in velocity can cause the oscillator to vibrate at high frequency and amplitude, significantly increasing the alternating load on it and potentially damaging the oscillator or even the generator. Such malfunctions necessitate shutdown and maintenance of the entire power generation device, impacting overall power generation efficiency and hindering its widespread application. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a highly stable multi-oscillator linkage flow-induced vibration power generation device and method. It can adjust the oscillators according to the fluid flow velocity, and by changing the water-facing area of ​​the oscillators, it avoids excessively high vibration amplitude and frequency of the oscillators when the fluid flow velocity is too fast, thereby protecting the oscillators and other structures.

[0005] To achieve the above objectives, the specific solution adopted by the present invention is as follows:

[0006] A highly stable multi-oscillator linked flow-induced vibration power generation device includes multiple groups of power generation mechanisms distributed along a first direction, each group having at least two power generation mechanisms, and the power generation mechanisms in the same group being distributed along a second direction, which is perpendicular to the first direction. Each power generation mechanism includes a top-closed mounting cylinder, in which a linear generator is fixedly installed. The power input axis of the linear generator extends downward and is fixedly connected to a lifting plate. A transmission rod is rotatably connected to the lower surface of the lifting plate, and an oscillator is fixedly connected to the lower end of the transmission rod. The oscillator is parallel to the fluid surface and is placed in the fluid.

[0007] Preferably, an adjusting motor is fixedly installed in the mounting cylinder, and the adjusting motor is driven by a rotating shaft. A gear is fixedly sleeved on the rotating shaft, and the gear passes through the lifting plate. A rotating ring is rotatably connected to the lower surface of the lifting plate. The rotating ring is coaxially arranged with the transmission rod and connected by several connecting rods. A rack that meshes with the gear is provided on the inner wall of the rotating ring, and the axial length of the gear is greater than the width of the rack.

[0008] Preferably, the lifting plate is fixedly connected to a plurality of downwardly extending extension rods, and the extension rods are located on the periphery of the rotating ring. The extension rods are fixedly connected to a limiting rod parallel to the lifting plate, and a distance is left between the limiting rods and the lifting plate to form a receiving space that can accommodate the rotating ring.

[0009] Preferably, at least one hydraulic rod is fixedly installed in the mounting cylinder, the hydraulic rod is parallel to the power input shaft, and the movable end of the hydraulic rod is fixedly connected to the lifting plate.

[0010] Preferably, a limiting ring is fixedly connected to the inner wall of the bottom of the mounting cylinder. The limiting ring is located below the lifting plate and the rotating ring, and the transmission rod can pass through the inner hole of the limiting ring.

[0011] Preferably, in the multiple power generation mechanisms in the same group, the height of the oscillator is different.

[0012] Preferably, the power generation mechanism includes a housing, the mounting cylinder is disposed in the housing, and the mounting cylinder is fixedly connected to the housing through multiple connecting strips, and all the housings are fixedly connected.

[0013] Preferably, a connecting plate is fixedly connected to the lower end of the transmission rod, and the transmission rod and the connecting plate are perpendicular to each other. Two mounting plates parallel to the transmission rod are fixedly connected to the connecting plate, and a central shaft is fixedly connected between the two mounting plates. The vibrator is fixedly sleeved on the central shaft.

[0014] Preferably, a reinforcing assembly is provided between the transmission rod and the connecting plate. The reinforcing assembly includes an upper reinforcing plate and a lower reinforcing plate arranged vertically. Two parallel vertical reinforcing plates are fixedly connected between the upper and lower reinforcing plates. The transmission rod passes through the upper and lower reinforcing plates in sequence, and the two vertical reinforcing plates are located on both sides of the transmission rod. The lower reinforcing plate is fixedly connected to the connecting plate.

[0015] A highly stable multi-oscillator linked current-induced vibration power generation method, based on the aforementioned highly stable multi-oscillator linked current-induced vibration power generation device, the method includes the following steps:

[0016] Deploy the power generation device and adjust the direction of the oscillator so that the oscillator is perpendicular to the direction of fluid flow;

[0017] The flow velocity of the fluid is monitored, and when the flow velocity reaches a preset safety threshold, the oscillator is rotated to reduce the water-facing area of ​​the oscillator.

[0018] This invention can adjust the oscillator according to the flow velocity of the fluid. By changing the water-facing area of ​​the oscillator, it avoids excessive vibration amplitude and frequency when the fluid flow velocity is too fast, thereby protecting the oscillator and other structures, effectively extending the service life of the power generation mechanism, and reducing the frequency of maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0020] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0021] Figure 2 This is a schematic diagram of the specific structure that drives the oscillator to rotate;

[0022] Figure 3 This is a schematic diagram showing the specific connection method between the lifting plate and the rotating ring;

[0023] Figure 4 This is a schematic diagram of the connection between the transmission rod and the rotating ring.

[0024] Reference numerals: 1-Box body, 2-Mounting cylinder, 3-Transmission rod, 4-Upper reinforcing plate, 5-Vertical reinforcing plate, 6-Lower reinforcing plate, 7-Connecting plate, 8-Mounting plate, 9-Central shaft, 10-Vibrator, 11-Connecting strip, 12-Linear generator, 13-Power input shaft, 14-Hydraulic rod, 15-Adjusting motor, 16-Rotating shaft, 17-Gear, 18-Lifting plate, 19-Rotating ring, 20-Limiting ring, 21-Channel, 22-Connecting rod, 23-Extension rod, 24-Limiting rod. Detailed Implementation

[0025] 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.

[0026] like Figure 1 As shown, a multi-oscillator linkage flow-induced vibration power generation device with high stability includes multiple groups of power generation mechanisms distributed along a first direction. Each group of power generation mechanisms has at least two components, and the power generation mechanisms in the same group are distributed along a second direction, which is perpendicular to the first direction. The power generation mechanism includes a top-closed mounting cylinder 2. A linear generator 12 is fixedly installed in the mounting cylinder 2. The power input shaft 13 of the linear generator 12 extends downward and is fixedly connected to a lifting plate 18. A transmission rod 3 is rotatably connected to the lower surface of the lifting plate 18. An oscillator 10 is fixedly connected to the lower end of the transmission rod 3. The oscillator 10 is parallel to the fluid surface and is placed in the fluid.

[0027] In use, after the invention is installed and deployed, the vibrator 10 is located in the fluid, with its length direction perpendicular to the fluid flow direction. During fluid flow, the vibrator 10 is impacted, causing it to vibrate up and down. As the vibrator 10 moves upward, it pushes the transmission rod 3 upward, which in turn pushes the lifting plate 18 to move synchronously. The lifting plate 18 then pushes the power input shaft 13 upward, thereby driving the linear generator 12 to output electrical energy, completing the flow-induced vibration power generation. As the vibrator 10 moves downward, it drives the transmission rod 3, the lifting plate 18, and the power input shaft 13 to return to their original positions. This cycle repeats, allowing the linear generator 12 to continuously output electrical energy. On the other hand, real-time monitoring of the fluid flow rate is crucial. If the fluid flow rate is too high, the vibration amplitude and frequency of the vibrator 10 may become excessively high. Prolonged exposure to this condition could damage the vibrator 10 or other structures. To avoid this situation, when the detected flow velocity reaches a preset safety threshold, the transmission rod 3 is rotated, which in turn drives the oscillator 10 to rotate synchronously. This oscillator 10 rotates until its length direction is parallel to the fluid flow direction. At this point, the water-facing area of ​​the oscillator 10 decreases, and the impact of the fluid on the oscillator 10 significantly reduces its vibration amplitude and frequency, thus protecting the oscillator 10 and other structures. This method effectively extends the service life of the power generation mechanism and reduces the frequency of maintenance. Furthermore, multiple power generation mechanisms working together result in higher power generation efficiency.

[0028] This invention can adjust the oscillator 10 according to the flow velocity of the fluid. By changing the water-facing area of ​​the oscillator 10, it avoids excessively high vibration amplitude and frequency of the oscillator 10 when the fluid flow velocity is too fast, thereby protecting the oscillator 10 and other structures, effectively extending the service life of the power generation mechanism, and reducing the frequency of maintenance.

[0029] like Figure 2 As shown, to facilitate the rotation of the transmission rod 3 and the vibrator 10, an adjusting motor 15 is fixedly installed in the mounting cylinder 2. The adjusting motor 15 drives and connects to a rotating shaft 16. A gear 17 is fixedly sleeved on the rotating shaft 16, and the gear 17 passes through a lifting plate 18. A rotating ring 19 is rotatably connected to the lower surface of the lifting plate 18. The rotating ring 19 is coaxially arranged with the transmission rod 3 and connected by several connecting rods 22. A rack that meshes with the gear 17 is provided on the inner wall of the rotating ring 19, and the axial length of the gear 17 is greater than the width of the rack. When the fluid flow velocity is detected to reach a preset safety threshold, the adjusting motor 15 is activated and drives the rotating shaft 16 to rotate. The rotating shaft 16 drives the gear 17 to rotate. During the rotation of the gear 17, because the gear 17 and the rack are meshed with each other, the gear 17 can drive the rack to rotate, which in turn drives the rotating ring 19 to rotate. Finally, the rotating ring 19 drives the transmission rod 3 and the vibrator 10 to rotate synchronously through the connecting rods 22, thereby changing the direction of the vibrator 10. When the fluid flow velocity decreases below the safety threshold, the motor 15 reverses its operation, driving the transmission rod 3 and the vibrator 10 to reset. This setting allows for convenient adjustment of the direction of the vibrator 10 with fast response, effectively preventing damage to the vibrator 10. Furthermore, because the transmission rod 3, rotating ring 19, and lifting plate 18 need to move synchronously up and down during the vibration of the vibrator 10, by ensuring that the axial length of the gear 17 is greater than the width of the rack, the gear 17 remains engaged with the rack even as the rotating ring 19 moves up and down. This ensures smooth power generation while also allowing for easy adjustment of the vibrator 10's direction.

[0030] like Figure 3As shown, the specific connection between the lifting plate 18 and the rotating ring 19 is as follows: the lifting plate 18 is fixedly connected to multiple downward-extending extension rods 23, and the extension rods 23 are located around the rotating ring 19. Each extension rod 23 is fixedly connected to a limiting rod 24 parallel to the lifting plate 18, and a distance is left between the limiting rod 24 and the lifting plate 18 to form a space capable of accommodating the rotating ring 19. During the vibration of the oscillator 10 and the upward movement of the transmission rod 3, the transmission rod 3 can drive the connecting rod 22 and the rotating ring 19 to move upward synchronously, and push the lifting plate 18 upward. When the oscillator 10 moves downward, it can pull the extension rods 23 and the lifting plate 18 downward synchronously through the limiting rod 24, thereby ensuring smooth driving of the linear generator 12 to generate electricity. On the other hand, when the adjusting motor 15 drives the gear 17 to rotate, the rotating ring 19 can rotate freely within the accommodating space, thereby changing the direction of the transmission rod 3 and the oscillator 10. In practical applications, because the fluid flow velocity rarely reaches the safety threshold, the direction of the vibrator 10 is not frequently adjusted, and consequently, the rotating ring 19 does not rotate frequently. Therefore, although the rotating ring 19 will experience sliding friction with the limiting rod 24 during rotation, it will not cause rapid friction damage to the rotating ring 19 and the limiting rod 24. Compared with conventional methods of achieving rotational connection through bearings and other structures, this connection method between the lifting plate 18 and the rotating ring 19 is simpler and less prone to corrosion in humid environments near the fluid, which could prevent smooth rotation.

[0031] like Figure 4 As shown, the rotating ring 19 and the transmission rod 3 are further connected by three connecting rods 22. These three connecting rods 22 are evenly distributed around the circumference of the transmission rod 3, with adjacent connecting rods 22 forming a 120° angle. A rack is positioned between two connecting rods 22, and a gear 17 is also located between these two connecting rods 22. Because the oscillator 10 only needs to rotate 90° to reach a state parallel to the fluid flow direction, a 120° angle between the two connecting rods 22 is sufficient to meet the rack's requirements. Based on this, with only three connecting rods 22, the overall weight is lower, and the oscillator 10 can more easily drive the transmission rod 3, rotating ring 19, and lifting plate 18 upwards.

[0032] To ensure a more stable reset of the vibrator 10 after it moves upward and drives the linear generator 12, at least one hydraulic rod 14 is fixedly installed in the mounting cylinder 2. The hydraulic rod 14 is parallel to the power input shaft 13, and its movable end is fixedly connected to the lifting plate 18. When the lifting plate 18 is lifted upward by the vibrator 10, the hydraulic rod 14 retracts. When the vibrator 10 moves downward, the hydraulic rod 14 extends by injecting liquid into it. This allows the hydraulic rod 14 to push the lifting plate 18 downward, which in turn pushes the vibrator 10 downward via the rotating ring 19 and the transmission rod 3, thus ensuring the vibrator 10 can reset smoothly.

[0033] To prevent the vibrator 10 from moving excessively downwards, a limiting ring 20 is fixedly connected to the inner wall of the bottom of the mounting cylinder 2. The limiting ring 20 is located below the lifting plate 18 and the rotating ring 19, and the transmission rod 3 can pass through the inner hole of the limiting ring 20. By setting the limiting ring 20, the rotating ring 19 can be limited, thereby constraining the lowest position of the vibrator 10 and further improving the overall stability of the power generation mechanism.

[0034] To further improve the overall power generation efficiency of the device and avoid interference between different power generation mechanisms, especially to prevent the energy of the fluid from decreasing after being blocked by one oscillator 10, which would lead to a decrease in the vibration amplitude of the oscillator 10 when it impacts other oscillators 10, the heights of the oscillators 10 in the same group are different. Through this arrangement, different oscillators 10 in the same group of power generation mechanisms will be impacted by fluid at different depths, thus avoiding mutual interference and ensuring that each power generation mechanism has high power generation efficiency.

[0035] To facilitate the connection of multiple power generation mechanisms and thus the installation and deployment of the entire device, the power generation mechanism includes a housing 1, a mounting cylinder 2 is disposed in the housing 1, and the mounting cylinder 2 is fixedly connected to the housing 1 by multiple connecting strips 11, and all housings 1 are fixedly connected.

[0036] The specific connection method between the transmission rod 3 and the vibrator 10 is as follows: a connecting plate 7 is fixedly connected to the lower end of the transmission rod 3, and the transmission rod 3 and the connecting plate 7 are perpendicular to each other. Two mounting plates 8 parallel to the transmission rod 3 are fixedly connected to the connecting plate 7. A central shaft 9 is fixedly connected between the two mounting plates 8, and the vibrator 10 is fixedly sleeved on the central shaft 9. In this invention, the vibrator 10 is triangular prism-shaped, and a mounting hole is opened in the middle. The central shaft 9 can pass through the mounting hole so that the vibrator 10 is fixedly sleeved on the central shaft 9. One edge of the vibrator 10 faces the source of the fluid so that the fluid can impact the vibrator 10 and cause the vibrator 10 to vibrate. Furthermore, in order to avoid the connecting plate 7 and the mounting plate 8 from excessively obstructing the fluid and consuming fluid energy, the sides of the connecting plate 7 and the mounting plate 8 are both set as arc-shaped surfaces.

[0037] To strengthen the connection between the connecting plate 7 and the transmission rod 3 and prevent the vibrator 10 from detaching, a reinforcing assembly is provided between the transmission rod 3 and the connecting plate 7. This assembly includes an upper reinforcing plate 4 and a lower reinforcing plate 6 positioned vertically. Two parallel vertical reinforcing plates 5 are fixedly connected between the upper and lower reinforcing plates 4 and 6. The transmission rod 3 passes through the upper reinforcing plate 4 and the lower reinforcing plate 6 sequentially, with the two vertical reinforcing plates 5 located on either side of the transmission rod 3. The lower reinforcing plate 6 is fixedly connected to the connecting plate 7. The transmission rod 3 is fixedly connected to both the upper reinforcing plate 4 and the lower reinforcing plate 6. With this structure, there are more connection points between the transmission rod 3 and the connecting plate 7, resulting in higher connection strength. This can prevent the connecting plate 7, the mounting plate 8, and the vibrator 10 from falling off, ensuring that the power generation mechanism can generate electricity stably. Similar to the connecting plate 7 and the mounting plate 8, in order to avoid the upper reinforcing plate 4, the lower reinforcing plate 6, and the vertical reinforcing plate 5 from causing excessive obstruction to the fluid, the sides of the upper reinforcing plate 4, the lower reinforcing plate 6, and the vertical reinforcing plate 5 are also set as arc surfaces.

[0038] A highly stable multi-oscillator linkage current-induced vibration power generation method, based on the aforementioned highly stable multi-oscillator linkage current-induced vibration power generation device, includes steps S1 and S2.

[0039] S1. Deploy the power generation device and adjust the direction of the oscillator 10 so that the oscillator 10 is perpendicular to the direction of fluid flow. After the power generation device is deployed, the fluid impact on the oscillator 10 can cause the oscillator 10 to vibrate and drive the linear generator 12 to generate electricity. For details, please refer to the device section above. The specific structure and power generation principle of the linear generator 12 are conventional technologies in this field and will not be described in detail here.

[0040] S2. Monitor the fluid flow velocity. When the flow velocity reaches a preset safety threshold, rotate the oscillator 10 to reduce its water-facing area. The specific value of the safety threshold can be determined based on the actual fluid conditions and the overall design parameters of the device, and will not be elaborated here.

[0041] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-oscillator linked current-induced vibration power generation device with high stability, characterized in that, The device includes multiple sets of power generation mechanisms distributed along a first direction, each set having at least two power generation mechanisms, and the power generation mechanisms in the same set being distributed along a second direction, which is perpendicular to the first direction. The power generation mechanism includes a top-closed mounting cylinder (2), in which a linear generator (12) is fixedly installed. The power input shaft (13) of the linear generator (12) extends downward and is fixedly connected to a lifting plate (18). The lower surface of the lifting plate (18) is rotatably connected to a transmission rod (3), and the lower end of the transmission rod (3) is fixedly connected to a vibrator (10). The vibrator (10) is parallel to the fluid surface and is placed in the fluid. An adjusting motor (15) is fixedly installed in the mounting cylinder (2). The adjusting motor (15) drives a rotating shaft (16). A gear (17) is fixedly sleeved on the rotating shaft (16), and the gear (17) passes through the lifting plate (18). A rotating ring (19) is rotatably connected to the lower surface of the lifting plate (18). The rotating ring (19) is coaxially arranged with the transmission rod (3) and connected by several connecting rods (22). A rack that meshes with the gear (17) is provided on the inner wall of the rotating ring (19), and the axial length of the gear (17) is greater than the width of the rack. In the multiple power generation mechanisms in the same group, the height of the oscillator (10) is different; The power generation mechanism includes a housing (1), and the mounting cylinder (2) is disposed in the housing (1). The mounting cylinder (2) is fixedly connected to the housing (1) by multiple connecting strips (11). All the housings (1) are fixedly connected.

2. The multi-oscillator linkage current-induced vibration power generation device with high stability as described in claim 1, characterized in that, The lifting plate (18) is fixedly connected to a plurality of downwardly extending extension rods (23), and the extension rods (23) are located on the periphery of the rotating ring (19). The extension rods (23) are fixedly connected to a limiting rod (24) that is parallel to the lifting plate (18). The limiting rod (24) and the lifting plate (18) are left with a distance to form a receiving space that can accommodate the rotating ring (19).

3. The multi-oscillator linkage current-induced vibration power generation device with high stability as described in claim 1, characterized in that, At least one hydraulic rod (14) is fixedly installed in the mounting cylinder (2). The hydraulic rod (14) is parallel to the power input shaft (13), and the movable end of the hydraulic rod (14) is fixedly connected to the lifting plate (18).

4. A multi-oscillator linkage current-induced vibration power generation device with high stability as described in claim 1, characterized in that, A limiting ring (20) is fixedly connected to the inner wall of the bottom of the mounting cylinder (2). The limiting ring (20) is located below the lifting plate (18) and the rotating ring (19). The transmission rod (3) can pass through the inner hole of the limiting ring (20).

5. A multi-oscillator linkage current-induced vibration power generation device with high stability as described in claim 1, characterized in that, The lower end of the transmission rod (3) is fixedly connected to a connecting plate (7), and the transmission rod (3) and the connecting plate (7) are perpendicular to each other. The connecting plate (7) is fixedly connected to two mounting plates (8) that are parallel to the transmission rod (3). A central shaft (9) is fixedly connected between the two mounting plates (8), and the vibrator (10) is fixedly sleeved on the central shaft (9).

6. A multi-oscillator linkage current-induced vibration power generation device with high stability as described in claim 5, characterized in that, A reinforcing assembly is provided between the transmission rod (3) and the connecting plate (7). The reinforcing assembly includes an upper reinforcing plate (4) and a lower reinforcing plate (6) arranged vertically. Two parallel vertical reinforcing plates (5) are fixedly connected between the upper reinforcing plate (4) and the lower reinforcing plate (6). The transmission rod (3) passes through the upper reinforcing plate (4) and the lower reinforcing plate (6) in sequence. The two vertical reinforcing plates (5) are located on both sides of the transmission rod (3). The lower reinforcing plate (6) is fixedly connected to the connecting plate (7).

7. A method for generating electricity using multi-oscillator linkage current-induced vibration with high stability, based on a multi-oscillator linkage current-induced vibration generating device with high stability as described in any one of claims 1-6, characterized in that, The method includes the following steps: Deploy the power generation device and adjust the direction of the oscillator (10) so that the oscillator (10) is perpendicular to the flow direction of the fluid; The flow rate of the fluid is monitored, and when the flow rate reaches a preset safety threshold, the oscillator (10) is rotated to reduce the water-facing area of ​​the oscillator (10).

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