Efficient flow-induced vibration power generation device and power generation method

Abstract

An efficient flow-induced vibration power generation device comprises two mounting frames arranged in parallel, a power generation mechanism is arranged on the first mounting frame, and a protection mechanism is arranged on the second mounting frame; the power generation mechanism comprises at least one linear generator, power input rods of all the linear generators are arranged downwards and jointly connected with a vibrator, and the vibrator is arranged in fluid and can vibrate up and down when impacted by the fluid. The protection mechanism is arranged in the water facing direction of the vibrator and comprises two rotationally arranged protection plates, the vibrator can be exposed when the two protection plates rotate to be parallel to each other, and the vibrator can be shielded when the two protection plates rotate to form an included angle. When the flow speed of fluid is too high, the power generation mechanism can be protected through the protection mechanism, the power generation mechanism is prevented from being damaged, particularly, the vibrator and the linear generator are prevented from being damaged, the maintenance time consumption of equipment can be reduced, and the overall power generation efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of flow-induced vibration power generation, and specifically relates to a high-efficiency flow-induced vibration power generation device and a power generation method. Background Art

[0002] The flow-induced vibration phenomenon refers to that when a fluid flows over the surface of a non-linear object, vortices are alternately shed on both sides of it, and a periodic pulsating lift is generated. If the non-linear object is elastically supported, periodic vibrations will be generated in the direction perpendicular to the oncoming flow direction, that is, flow-induced vibration (FIM). The flow-induced vibration phenomenon will generate alternating loads on the structure in the engineering field, damage its strength and shorten its service life. However, this vibration phenomenon can also be used to convert the mechanical energy generated by the vibration into electrical energy, so as to continuously generate electricity.

[0003] In the prior art, a flow-induced vibration power generation device needs to set an oscillator in the fluid. The oscillator vibrates under the action of the fluid. During the vibration process, the oscillator can drive the generator to act, so as to convert the kinetic energy of the oscillator into electrical energy. However, the flow velocity of the fluid is not constant. If the flow velocity of the fluid suddenly increases, it will cause the oscillator to vibrate at a high frequency and with a large amplitude, resulting in a significant increase in the alternating load on the oscillator, and it is very easy to cause damage to the oscillator and even the generator. Once a failure occurs, the entire power generation device needs to be shut down for maintenance, resulting in a reduction in the overall power generation efficiency and restricting the popularization and application of the flow-induced vibration power generation device. Summary of the Invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a high-efficiency flow-induced vibration power generation device and a power generation method, which can use a protection mechanism to protect the power generation mechanism when the fluid flow velocity is too fast, avoid damage to the power generation mechanism, especially avoid damage to the oscillator and the linear generator, and further reduce the maintenance time of the equipment and ensure the overall power generation efficiency.

[0005] In order to achieve the above purpose, the specific solutions adopted by the present invention are as follows: A high-efficiency flow-induced vibration power generation device includes two installation frames arranged in parallel. A power generation mechanism is arranged on the first installation frame, and a protection mechanism is arranged on the second installation frame; The power generation mechanism includes at least one linear generator. The power input rods of all the linear generators are arranged downward and are commonly connected to an oscillator. The oscillator is arranged in the fluid and can vibrate up and down when impacted by the fluid; The protection mechanism is arranged in the water-facing direction of the oscillator. The protection mechanism includes two rotatably arranged protection plates. When the two protection plates rotate to a parallel state, the oscillator can be exposed, and when the two protection plates rotate to form an included angle, the oscillator can be shielded.

[0006] Preferably, the mounting bracket includes two channel steels disposed perpendicular to the fluid surface, the two channel steels are parallel to each other, and the opening directions of the two channel steels are opposite; On the first mounting bracket, the linear generator is disposed inside the channel steel, and the vibrator is slidably connected between the two channel steels; On the second mounting bracket, the two protection plates are rotatably disposed between the two channel steels.

[0007] Preferably, in the mounting bracket, the upper ends of the two channel steels are fixedly connected together with a substrate disposed parallel to the fluid surface, the substrate is fixedly connected with a mounting plate, and the two mounting plates are fixedly connected by at least one connecting plate.

[0008] Preferably, the mounting plate includes a first portion and a second portion perpendicular to each other, the first portion is fixedly connected with the substrate, the second portion is perpendicular to the substrate, and a plurality of reinforcing blocks are connected between the second portion and the substrate, and the second portions of the two mounting plates are connected by a plurality of tie rods.

[0009] Preferably, in the first mounting bracket, second sliding blocks are slidably disposed inside the two channel steels, and through grooves extending along the length direction are formed at the bottoms of the two channel steels, a mounting shaft is fixedly connected between the two second sliding blocks, and the mounting shaft passes through the through groove, and the vibrator is fixedly disposed on the mounting shaft.

[0010] Preferably, in the first mounting bracket, the second sliding block is connected with a first sliding block by at least one force transmission rod extending along the length direction of the channel steel, and the first sliding block is fixedly connected with the power input rod of the linear generator.

[0011] Preferably, in the first mounting bracket, a fixing plate is fixedly connected between the two channel steels, a follower plate is fixedly connected between the two first sliding blocks, and the follower plate is connected with the fixing plate by at least one hydraulic cylinder.

[0012] Preferably, in the second mounting bracket, two adjusting motors are disposed inside one of the channel steels, the adjusting motors are drivingly connected with a central shaft, and the protection plate is correspondingly connected with the central shaft.

[0013] Preferably, in the second mounting bracket, two limiting columns are fixedly connected to one of the channel steels, the limiting columns correspond to the protection plates one by one, and the limiting columns are used for limiting the rotation range of the protection plates.

[0014] An efficient flow-induced vibration power generation method, based on the above-mentioned efficient flow-induced vibration power generation device, the method comprises the following steps: Deploy the power generation device; When the flow velocity of the fluid is lower than a preset safety threshold, the two protection plates of the protection mechanism rotate to a state where they are parallel to each other, and expose the oscillator; When the fluid impacts on the oscillator, the oscillator vibrates up and down and drives the linear generator to generate electricity; When the flow velocity of the fluid reaches the preset safety threshold, the two protection plates of the protection mechanism rotate to a state where they form an angle, and shield the oscillator.

[0015] The present invention can convert the kinetic energy of the fluid into electrical energy by means of the power generation mechanism to achieve flow-induced vibration power generation, and moreover, when the flow velocity of the fluid is too fast, the protection mechanism can be used to protect the power generation mechanism to avoid damage to the power generation mechanism, especially to avoid damage to the oscillator and the linear generator, thereby reducing the maintenance time of the equipment and ensuring the overall power generation efficiency. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is the overall structural schematic diagram of the power generation device of the present invention; Figure 2 is the structural schematic diagram of the protection mechanism; Figure 3 is the state schematic diagram when the two protection plates are parallel to each other; Figure 4 is the state schematic diagram when the two protection plates protect the oscillator.

[0018] Reference numerals: 1 - mounting plate, 2 - connecting plate, 3 - reinforcing block, 4 - base plate, 5 - tie rod, 6 - fastening nut, 7 - first channel steel, 8 - fixing plate, 9 - linear generator, 10 - power input rod, 11 - first sliding block, 12 - second channel steel, 13 - protection mechanism, 14 - force transmission rod, 15 - second sliding block, 16 - mounting shaft, 17 - limiting plate, 18 - oscillator, 19 - through groove, 20 - follower plate, 21 - hydraulic cylinder, 22 - adjusting motor, 23 - protection plate, 24 - arc-shaped water-facing surface, 25 - diversion area, 26 - flow velocity sensor, 27 - central axis, 28 - limiting column, 29 - flow splitting area, 30 - slow-down area. Detailed implementation mode

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figure 1 、 Figure 3 and Figure 4 shown, an efficient flow-induced vibration power generation device includes two mounting frames arranged in parallel. A power generation mechanism is provided on the first mounting frame, and a protection mechanism 13 is provided on the second mounting frame.

[0021] The power generation mechanism includes at least one linear generator 9. The power input rods 10 of all the linear generators 9 are arranged downward and are commonly connected to an oscillator 18. The oscillator 18 is arranged in the fluid and can vibrate up and down when impacted by the fluid.

[0022] The protection mechanism 13 is arranged in the water-facing direction of the oscillator 18. The protection mechanism 13 includes two rotatably arranged protection plates 23. When the two protection plates 23 rotate to a state of being parallel to each other, the oscillator 18 can be exposed. When the two protection plates 23 rotate to form an angle, the oscillator 18 can be shielded.

[0023] During use, when the flow rate of the fluid is low, the two rotating plates 23 of the protection mechanism 13 rotate to a state where they are parallel to each other, thereby exposing the oscillator 18. The fluid can pass through the diversion area 25 between the two protection plates 13 and impact on the oscillator 18, causing the oscillator 18 to vibrate up and down. Then, the power input rod 10 of the linear generator 9 is driven to move up and down by the oscillator 18, achieving the effect of driving the linear generator 9. The linear generator 9 converts the kinetic energy of the oscillator 18 into electrical energy, realizing fluid-induced vibration power generation. When the flow rate of the fluid is too fast, it may cause the vibration amplitude of the oscillator 18 to be too large, and then it may cause damage to the oscillator 18 or the linear generator 9. At this time, the two protection plates 23 of the protection mechanism 13 are rotated to form an angle. At this time, one end of the two protection plates 13 is in contact with each other, while the other end is separated from each other. The two protection plates 13 are integrally distributed in a V shape. At this time, a diversion area 29 is formed outside the two protection plates 13, and a deceleration area 30 is formed between the two protection plates 13. After the fluid impacts on the protection plate 13, it can flow along the diversion area 29, greatly reducing the fluid velocity in the deceleration area 30. The deceleration area 30 corresponds to the oscillator 18, that is, at this time, the two protection plates 13 shield the oscillator 18, and the oscillator 18 is only affected by the low-speed fluid in the deceleration area 30, so it will not vibrate significantly, realizing the protection of the oscillator 18 and the linear generator 9.

[0024] The present invention can utilize the power generation mechanism to convert the kinetic energy of the fluid into electrical energy, realizing fluid-induced vibration power generation. And when the flow rate of the fluid is too fast, the protection mechanism 13 can be used to protect the power generation mechanism, avoiding damage to the power generation mechanism, especially avoiding damage to the oscillator 18 and the linear generator 9. Furthermore, it can reduce the maintenance time of the equipment and ensure the overall power generation efficiency.

[0025] As Figure 2 shown, the specific structure of the mounting frame is: the mounting frame includes two channel steels perpendicular to the fluid surface, the two channel steels are parallel to each other, and the opening directions of the two channel steels are opposite. The two channel steels are the first channel steel 7 and the second channel steel 12 respectively.

[0026] To facilitate the installation of the power generation device of the present invention in the fluid, in the mounting frame, the upper ends of the two channel steels are fixedly connected together with a substrate 4 parallel to the fluid surface. The substrate 4 is fixedly connected with a mounting plate 1, and the two mounting plates 1 are fixedly connected through at least one connecting plate 2. Based on this method, the two mounting frames can be fixedly connected into an integral body, and then one of the mounting plates 1 can be connected to structures such as a base on the shore of the fluid, realizing the installation of the power generation device of the present invention.

[0027] In order to further enhance the connection strength between the two mounting brackets, the mounting plate 1 includes a first part and a second part that are perpendicular to each other. The first part is fixedly connected to the base plate 4, the second part is perpendicular to the base plate 4, and a plurality of reinforcing blocks 3 are connected between the second part and the base plate 4. The second parts of the two mounting plates 1 are connected by a plurality of tie rods 5. Two fastening nuts 6 are provided on the tie rod 5, and the two fastening nuts 6 are respectively attached to the second parts of the two mounting plates 1 to fix the tie rod 5, and then the two second parts are tightened and fixed.

[0028] The specific setting method of the linear generator 9 is as follows: On the first mounting bracket, the linear generator 9 is arranged inside the channel steel, and the vibrator 18 is slidably connected between the two channel steels. Arranging the linear generator 9 inside the channel steel can protect the linear generator 9 by using the channel steel to prevent the main body of the linear generator 9 from being damaged by the debris carried in the fluid.

[0029] The rotation mode of the two protection plates 23 is as follows: On the second mounting bracket, the two protection plates 23 are both rotatably arranged between the two channel steels.

[0030] In order to ensure that the power input rod 10 of the linear generator 9 can be smoothly driven during the up and down vibration of the vibrator 18, in the first mounting bracket, second sliding blocks 15 are slidably arranged on the inner sides of the two channel steels, and through grooves 19 extending along the length direction are opened at the bottoms of the two channel steels. An installation shaft 16 is fixedly connected between the two second sliding blocks 15, and the installation shaft 16 passes through the through groove 19. The vibrator 18 is fixedly arranged on the installation shaft 16. By using the cooperation between the second sliding block 15 and the channel steel and the cooperation between the installation shaft 16 and the through groove 19, the vibration direction of the vibrator 18 can be restricted to ensure that the vibrator 18 can only move along the length direction of the through groove 19 and the channel steel, that is, to ensure that the vibrator 18 can only vibrate up and down. On this basis, driving the power input rod 10 by the second sliding block 15 can ensure that the action of the power input rod 10 is more stable, and further ensure that the linear generator 9 can generate electricity stably. A limit plate 17 is fixedly arranged at each end of the installation shaft 16 to limit the second sliding block 15 to prevent the second sliding block 15 from falling off.

[0031] In order to enable the oscillator 18 to be moved to the most suitable depth, thereby improving the power generation efficiency of the power generation device, in the first mounting frame, the second sliding block 15 is connected to the first sliding block 11 through at least one force transmission rod 14 extending along the length direction of the channel steel, and the first sliding block 11 is fixedly connected to the power input rod 10 of the linear generator 9. By setting the force transmission rod 14, the linear generator 9 can be arranged at a position higher than the fluid surface, and the power input rod 10 can also be higher than the fluid surface, while the oscillator 18 can penetrate to a suitable depth, improving the overall power generation efficiency of the device. In an embodiment of the present invention, the force transmission rod 14 can be set as a telescopic rod, so as to flexibly adjust the position of the oscillator 18 according to the actual situation of the fluid.

[0032] During the up and down vibration of the oscillator 18, when the oscillator 18 moves upward, it can drive the power input rod 10 to act, achieving the effect of driving the linear generator 9 to generate electricity. In order to ensure that the oscillator 18 can smoothly reset downward and avoid damage to the linear generator 9 caused by the excessive vibration amplitude of the oscillator 18, in the first mounting frame, a fixed plate 8 is fixedly connected between the two channel steels, a follower plate 20 is fixedly connected between the two first sliding blocks 11, and the follower plate 20 is connected to the fixed plate 8 through at least one hydraulic cylinder 21. On the one hand, the hydraulic cylinder 21 can play a buffering role to avoid damage to the linear generator 9 caused by the excessive vibration amplitude of the oscillator 18. On the other hand, it can also push the oscillator 18 downward during the reset process to ensure that the oscillator 18 can continuously vibrate up and down.

[0033] In order to quickly control the rotation of the two protection plates 13 when the fluid flow rate is too fast, in the second mounting frame, two adjustment motors 22 are arranged inside one of the channel steels, the adjustment motors 22 are drivingly connected to a central shaft 27, and the protection plate 23 is correspondingly connected to the central shaft 27. By using the two adjustment motors 22 to respectively adjust the two protection plates 13, the two protection plates 13 can be adjusted more quickly to ensure that a slow flow area 30 can be quickly formed to protect the oscillator 18. Correspondingly, a flow rate sensor 26 is also arranged between the two channel steels for sensing the flow rate of the fluid in the diversion area 25, and when the flow rate is too fast, the two adjustment motors 22 can be quickly used to drive the protection plates 13 to rotate. The flow rate sensor 26 belongs to mature prior art and will not be elaborated here.

[0034] During the process of rotating the two protection plates 13 to form a diversion area 29 and a slow flow area 30, in order to avoid deviation in the angle caused by inconsistent rotation speeds of the two protection plates 13, in the second mounting frame, two limit posts 28 are fixedly connected to one of the channel steels, the limit posts 28 correspond to the protection plate 23 one by one, and the limit posts 28 are used to limit the rotation range of the protection plate 23. By setting the limit posts 28, the protection plate 23 can be rotated to a fixed angle, so as to stably form a diversion area 29 and a slow flow area 30.

[0035] To ensure that the protection plate 13 does not obstruct the fluid flow when the fluid velocity is low, that is, to ensure that the protection plate 13 does not obstruct the fluid when the two protection plates 13 are parallel to each other to form a diversion area 25, an edge of the protection plate 13 close to the fluid source is set as an arc-shaped water-facing surface 24.

[0036] The present invention further provides an efficient flow-induced vibration power generation method. Based on the above-mentioned efficient flow-induced vibration power generation device, the method includes the following steps: S1. Deploy the power generation device.

[0037] S2. When the fluid velocity is lower than a preset safety threshold, the two protection plates 23 of the protection mechanism 13 rotate to a parallel state, and the oscillator 18 is exposed.

[0038] S3. When the fluid impacts on the oscillator 18, the oscillator 18 vibrates up and down and drives the linear generator 9 to generate electricity.

[0039] S4. When the fluid velocity reaches the preset safety threshold, the two protection plates 23 of the protection mechanism 13 rotate to a state of forming an included angle, and the oscillator 18 is shielded.

[0040] In the description of the present specification, the embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-efficiency flow-induced vibration power generation device, characterized in that: It comprises two mounting frames arranged in parallel, the first mounting frame being provided with a power generation mechanism, and the second mounting frame being provided with a protection mechanism (13); The power generation mechanism comprises at least one linear generator (9), the power input rods (10) of all the linear generators (9) are arranged downward and are commonly connected to a vibrator (18), the vibrator (18) is arranged in a fluid and is capable of vibrating up and down when impacted by the fluid; The protection mechanism (13) is arranged in the water-facing direction of the vibrator (18), and the protection mechanism (13) comprises two rotatably arranged protection plates (23). When the two protection plates (23) are rotated to a state parallel to each other, the vibrator (18) can be exposed; when the two protection plates (23) are rotated to form an angle, the vibrator (18) can be shielded.

2. A high-efficiency flow-induced vibration power generation device as claimed in claim 1, characterized in that: The mounting frame comprises two channel steels arranged perpendicular to the fluid surface, the two channel steels are parallel to each other, and the opening directions of the two channel steels are opposite; On the first mounting frame, the linear generator (9) is arranged on the inner side of the channel steel, and the vibrator (18) is slidably connected between two of the channel steels; On the second mounting frame, the two protection plates (23) are both rotatably arranged between the two channel steels.

3. A high-efficiency flow-induced vibration power generation device as claimed in claim 2, characterized in that: In the mounting frame, the upper ends of the two channel steels are fixedly connected to a base plate (4) arranged parallel to the fluid surface, the base plate (4) is fixedly connected to a mounting plate (1), and the two mounting plates (1) are fixedly connected via at least one connecting plate (2).

4. A high-efficiency flow-induced vibration power generation device as claimed in claim 3, characterized in that: The mounting plate (1) comprises a first part and a second part which are perpendicular to each other, the first part is fixedly connected to the base plate (4), the second part and the base plate (4) are perpendicular to each other, and a plurality of reinforcing blocks (3) are connected between the second part and the base plate (4), and the second parts of the two mounting plates (1) are connected via a plurality of tension screws (5).

5. A high-efficiency flow-induced vibration power generation device as claimed in claim 2, characterized in that: In the first mounting frame, second sliding blocks (15) are slidably arranged on the inner sides of the two channel steels, and through grooves (19) extending along the length direction are opened at the bottoms of the two channel steels. A mounting shaft (16) is fixedly connected between the two second sliding blocks (15), and the mounting shaft (16) passes through the through groove (19). The vibrator (18) is fixedly arranged on the mounting shaft (16).

6. A high-efficiency flow-induced vibration power generation device as claimed in claim 5, characterized in that: In the first mounting frame, the second sliding block (15) is connected to the first sliding block (11) via at least one force transmission rod (14) extending along the length direction of the channel steel, and the first sliding block (11) is fixedly connected to the power input rod (10) of the linear generator (9).

7. A high-efficiency flow-induced vibration power generation device as claimed in claim 6, characterized in that: In the first mounting frame, a fixed plate (8) is fixedly connected between the two channel steels, a follower plate (20) is fixedly connected between the two first sliding blocks (11), and the follower plate (20) is connected to the fixed plate (8) via at least one hydraulic cylinder (21).

8. A high-efficiency flow-induced vibration power generation device as claimed in claim 2, characterized in that: In the second mounting frame, two adjusting motors (22) are arranged on the inner side of one of the channel steels, the adjusting motor (22) is drivingly connected to a central shaft (27), and the protection plate (23) is correspondingly connected to the central shaft (27).

9. A high-efficiency flow-induced vibration power generation device as claimed in claim 2, characterized in that: In the second mounting frame, one of the channel steels is fixedly connected to two limit columns (28), the limit columns (28) correspond to the protection plates (23) one by one, and the limit columns (28) are used to limit the rotation range of the protection plates (23).

10. A high-efficiency flow-induced vibration power generation method, characterized in that: Based on a high-efficiency flow-induced vibration power generation device as described in any one of claims 1 to 9, the method comprises the following steps: deploying the power generation device; When the flow rate of the fluid is lower than a preset safety threshold, the two protection plates (23) of the protection mechanism (13) rotate to a state parallel to each other, and expose the vibrator (18); When the fluid impacts the vibrator (18), the vibrator (18) vibrates up and down and drives the linear generator (9) to generate electricity; When the flow rate of the fluid reaches a preset safety threshold, the two protection plates (23) of the protection mechanism (13) rotate to form an angle and shield the vibrator (18).

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