A power generation device and power generation system based on vortex-induced oscillation

Abstract

The present invention discloses a power generation device and a power generation system based on vortex-induced oscillation, which is connected to the rotating shaft of an energy conversion component that can convert mechanical energy into electrical energy by setting a vortex-induced oscillation component. When the vortex in the water passes through, it will cause the vortex-induced oscillation component to swing as a whole and drive the rotating shaft to twist, so that the energy conversion component can operate and convert mechanical energy into electrical energy. The present invention has a simple structure and a clever design. Water flows in all directions in the water can cause vortex-induced oscillation movements of the vortex-induced oscillation component. Therefore, the vortex can be utilized to the maximum extent, and the power generation is reliable and efficient, filling the current technical gap in the field of vortex-induced oscillation in the power generation and energy collection field. In order to increase the output power, the present invention proposes a power generation system, which includes a plurality of the above-mentioned power generation devices based on vortex-induced oscillation. The combination of a plurality of power generation devices based on vortex-induced oscillation can greatly increase the output power of the power generation system.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation and energy collection, and in particular to a power generation device and a power generation system based on vortex-induced oscillation. Background Art

[0002] The friction nanogenerator is a new type of energy conversion device based on the coupling of friction electrification and electrostatic induction. It can efficiently convert low-frequency, irregular, and dispersed mechanical energy into electrical energy. Its basic working principle is: when two materials with different electron gain and loss capabilities come into contact, their surfaces will generate static charges due to friction electrification; and when the two materials are separated under the drive of mechanical external force, the positive and negative charges generated by friction electrification will also separate, thereby generating an induced potential difference between the upper and lower electrodes of the material; if a load is connected between the two electrodes or they are short-circuited, the induced potential difference will drive electrons to flow between the two electrodes through an external circuit, thereby forming an electric current. Therefore, when a force is applied to the system periodically, a reciprocating flow of electrons will occur between the two electrodes, thereby realizing the conversion of mechanical energy into electrical energy.

[0003] The electromagnetic power generation device is a device that generates electricity based on Faraday's law of electromagnetic induction. Its principle is that when the magnet and the coil have relative motion, the cross-sectional magnetic flux of the coil changes and generates an induced voltage, thereby completing the conversion between mechanical energy and electrical energy. Electromagnetic energy capture devices have the characteristics of high current, low impedance, simple structure and low cost, and are favored by researchers.

[0004] However, how to collect electrical energy through vortex-induced oscillating motion is an urgent problem to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide a power generation device and a power generation system based on vortex-induced oscillation, which can generate electricity through vortex-induced oscillation motion to fill the current technical gap in the field of vortex-induced oscillation in power generation and energy collection.

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

[0007] The present invention provides a power generation device based on vortex-induced oscillation, characterized in that:

[0008] An energy conversion component, the energy conversion component is used to convert mechanical energy into electrical energy, and includes a rotating shaft capable of driving the energy conversion component to operate;

[0009] A vortex-induced oscillation component, the vortex-induced oscillation component includes a columnar body and an arc-shaped plate, one end of the arc-shaped plate is connected to one axial end of the columnar body, and the other end of the arc-shaped plate is connected to the rotating shaft; the vortex-induced oscillation component can oscillate under the action of vortex in water and drive the rotating shaft to twist, so that the energy conversion component can operate and convert mechanical energy into electrical energy.

[0010] Optionally, the columnar body is a cylinder; and the arc-shaped plate is a "C"-shaped arc-shaped plate or an "S"-shaped arc-shaped plate.

[0011] Optionally, when the arc plate is the "C"-shaped arc plate, the "C"-shaped arc plate includes a first planar connecting section, a semicircular arc surface connecting section and a second planar connecting section arranged in sequence, wherein the first planar connecting section is tangent to the semicircular arc surface connecting section, and the first planar connecting section is connected to an axial end of the columnar body, the second planar connecting section is perpendicular to the first planar connecting section, and the central axes of the second planar connecting section, the semicircular arc surface connecting section and the central axis of the cylinder are located in the same plane.

[0012] Optionally, the energy conversion component is a friction nanogenerator, which includes:

[0013] Base;

[0014] A lower friction disc, wherein the lower friction disc is located above the base, and a lower surface of the lower friction disc is connected to an upper portion of the base, and an upper surface of the lower friction disc is provided with a first friction material;

[0015] The rotating shaft, the lower end of which passes through the lower friction plate and is rotatably connected to the lower friction plate through a bearing;

[0016] An upper friction disk, wherein the upper friction disk is sleeved on the rotating shaft, the upper end of the rotating shaft is connected to the second planar connecting section, and the upper friction disk is located between the second planar connecting section and the lower friction disk; a second friction material having a friction electrical polarity different from that of the first friction material is provided on the lower surface of the upper friction disk, the upper friction disk is spaced apart from the lower friction disk, and the distance between the upper friction disk and the lower friction disk can ensure the generation of friction electrification and electrostatic induction.

[0017] Optionally, the rotating shaft is a two-stage stepped shaft, which includes a coaxially arranged lower shaft section and an upper shaft section, and the diameter of the lower shaft section is larger than the diameter of the upper shaft section; the bearing is sleeved on the lower shaft section, and the inner ring of the bearing has an interference fit with the lower shaft section, and the lower friction disk is sleeved on the outside of the outer ring of the bearing, and the outer ring of the bearing has an interference fit with the lower friction disk; the upper friction disk is sleeved on the upper shaft section and has an interference fit with the upper shaft section; a groove is provided at the upper end of the upper shaft section through its center axis, and the groove passes through the radial direction of the upper shaft section and extends along the axial direction of the upper shaft section; the second planar connecting section is inserted into the groove, the second planar connecting section has an interference fit with the groove, and is reinforced by bolts.

[0018] Optionally, the lower end of the rotating shaft passes through the lower friction plate and is connected to a nut to limit the downward movement of the bearing.

[0019] Optionally, the upper friction disc and the lower friction disc are circular friction discs with the same diameter, wherein:

[0020] The lower surface of the upper friction disc is evenly divided into eight upper fan-shaped areas by grooves, and any two diagonally arranged upper fan-shaped areas are paved with the second friction material of the same triboelectric polarity and the same material, and any two adjacent upper fan-shaped areas are paved with the second friction material of the same triboelectric polarity and different materials;

[0021] The upper surface of the lower friction plate is equally divided into four lower sector-shaped areas by the grooves, and the first friction material is laid only in a pair of the lower sector-shaped areas that are arranged opposite to each other.

[0022] Optionally, the energy conversion component is an electromagnetic power generation device, which includes:

[0023] shell;

[0024] A magnet, which is disposed in the housing and is used to generate a fixed magnetic field;

[0025] The coil is arranged in the housing and located in the fixed magnetic field. The coil serves as a rotor and is connected to the lower end of the rotating shaft through a connecting rod and a coupling in sequence.

[0026] Optionally, a slot is provided at the upper end of the rotating shaft through its central axis, the slot passes through the radial direction of the rotating shaft and extends along the axial direction of the rotating shaft; the second planar connecting section is inserted into the slot, the second planar connecting section is interference fit with the slot, and is reinforced by bolts.

[0027] At the same time, the present invention proposes a power generation system, comprising a plurality of power generation devices based on vortex-induced oscillation as described above, and all of the power generation devices based on vortex-induced oscillation are distributed in an array.

[0028] Optionally, all of the power generation devices based on vortex-induced oscillation are arranged in a 3×3 array or a 2×3×2 array.

[0029] Compared with the prior art, the present invention has achieved the following technical effects:

[0030] The power generation device based on vortex-induced oscillation proposed in the present invention is connected to the rotating shaft of the energy conversion component that can convert mechanical energy into electrical energy by setting a vortex-induced oscillation component. When the vortex in the water passes through, it will cause the vortex-induced oscillation component to swing as a whole and drive the rotating shaft 1 to twist and swing, so that the energy conversion component can operate and convert mechanical energy into electrical energy. The present invention has a simple structure and a clever design. Water flow / vortex in all directions in the water can cause the vortex-induced oscillation movement of the vortex-induced oscillation component, so the vortex can be maximized, and the power generation is reliable and efficient, filling the current technical gap of vortex-induced oscillation in the field of power generation and energy collection.

[0031] In some technical solutions proposed by the present invention, the energy conversion component adopts a friction nanogenerator based on friction electrification and electrostatic induction coupling. When the eddy current in the water passes, it will cause the vortex-induced oscillation component to oscillate as a whole and drive the oscillation of the rotating shaft, so that the upper and lower friction disks of the friction nanogenerator with materials of different friction electric polarities rotate relative to each other, so that the materials of different friction electric polarities are constantly in contact and separated, thereby generating current and realizing the conversion of mechanical energy into electrical energy. The friction nanogenerator has a simple structure, can perform electromechanical energy conversion through vortex-induced oscillation, and has the advantages of rich material selection, small size, light weight, easy manufacturing and installation, etc.

[0032] In some technical solutions proposed by the present invention, the energy conversion component adopts an electromagnetic power generation device based on the principle of electromagnetic induction law, also known as an "electromagnetic energy collector". When the vortex in the water passes, it will cause the vortex-induced oscillation component to swing as a whole and drive the swing of the rotating shaft, so that the electromagnetic power generation device generates electricity. The electromagnetic power generation device has a simple structure and has the advantages of high frequency and high efficiency.

[0033] In order to increase the output power, the present invention also provides a power generation system, which includes multiple power generation devices based on vortex-induced oscillation as described above. The combined use of multiple power generation devices based on vortex-induced oscillation can greatly increase the output power of the power generation system.

[0034] In some technical solutions of the present invention, the power generation devices based on vortex-induced oscillation in the power generation system are arranged in an array, and the array arrangement can greatly improve the output power, so it is more efficient in collecting mechanical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic structural diagram of a power generation device based on vortex-induced oscillation disclosed in Embodiment 1 of the present invention;

[0037] Figure 2 It is a front view of the vortex-induced swing assembly disclosed in the first embodiment of the present invention;

[0038] Figure 3 for Figure 2 A left side view of the vortex-induced swing assembly shown;

[0039] Figure 4 A bottom view of a power generation device based on vortex-induced oscillation disclosed in Embodiment 1 of the present invention;

[0040] Figure 5 It is a schematic structural diagram of the lower surface of the upper friction disk disclosed in the first embodiment of the present invention;

[0041] Figure 6 It is a schematic structural diagram of the upper surface of the lower friction disk disclosed in the first embodiment of the present invention;

[0042] Figure 7 It is a schematic structural diagram of the lower surface of the lower friction disk disclosed in the first embodiment of the present invention;

[0043] Figure 8 It is a schematic diagram of a 3×3 array structure of a power generation device based on vortex-induced oscillation disclosed in Embodiment 1 of the present invention;

[0044] Fig. 9 This is a schematic diagram of a 2×3×2 array structure of a power generation device based on vortex-induced oscillation disclosed in Example 1 of the present invention;

[0045] Fig.10 It is a schematic structural diagram of a power generation device based on vortex-induced oscillation disclosed in the second embodiment of the present invention;

[0046] Fig.11 This is a schematic diagram of a 3×3 array structure of a power generation device based on vortex-induced oscillation disclosed in Embodiment 2 of the present invention;

[0047] Fig.12 This is a schematic diagram of the 2×3×2 array structure of a power generation device based on vortex-induced oscillation disclosed in Example 2 of the present invention.

[0048] Wherein, the accompanying drawings are marked as follows:

[0049] 100. A power generation device based on vortex-induced oscillation; 200. A power generation system;

[0050] 1. Rotating shaft; 1-1. Slot; 2. Column; 3. Arc plate; 3-1. First plane connecting section; 3-2. Semicircular arc connecting section; 3-3. Second plane connecting section; 4. Base; 5. Lower friction disc; 5-1. Lower fan-shaped area; 6. Upper friction disc; 6-1. Upper fan-shaped area; 7. Screw; 8. Nut; 9. Bearing; 10. Housing; 11. Coupling; 12. Groove. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] One of the purposes of the present invention is to provide a power generation device based on vortex-induced oscillation, which can generate electricity through vortex-induced oscillation motion to fill the current technical gap in the field of vortex-induced oscillation power generation and energy collection.

[0053] Another object of the present invention is to provide a power generation system having the above-mentioned power generation device based on vortex-induced oscillation.

[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Embodiment 1

[0056] like Figures 1 to 9 As shown, this embodiment provides a power generation device 100 based on vortex-induced oscillation, which mainly includes an energy conversion component and a vortex-induced oscillation component. The energy conversion component is used to convert mechanical energy into electrical energy, and it includes a rotating shaft 1 that can drive the energy conversion component to operate; the vortex-induced oscillation component includes a columnar body 2 and an arc plate 3, one end of the arc plate 3 is connected to an axial end of the columnar body 2, and the other end of the arc plate 3 is connected to the rotating shaft 1; the vortex-induced oscillation component can swing under the action of vortex in water and drive the rotating shaft 1 to twist, so that the energy conversion component can operate and realize the conversion of mechanical energy into electrical energy.

[0057] In this embodiment, the columnar body 2 may be a cylinder or a prism, and is generally preferably a cylinder; the arc plate 3 is preferably a "C"-shaped arc plate or an "S"-shaped arc plate.

[0058] Furthermore, in this embodiment, the vortex-induced swing assembly is formed by connecting a cylinder and a "C"-shaped arc plate up and down. Figure 2 and Figure 3 As shown, the "C"-shaped arc plate is an integrally formed structure, which specifically includes a first planar connecting segment 3-1, a semicircular arc surface connecting segment 3-2, and a second planar connecting segment 3-3 arranged in sequence, wherein the first planar connecting segment 3-1 is tangent to the semicircular arc surface connecting segment 3-2, and the first planar connecting segment 3-1 serves as the upper part of the "C"-shaped arc plate, and its upper surface is in surface contact with the lower end surface of the cylinder (i.e., the columnar body 2) and is connected by screws 7, and the second planar connecting segment 3-3 serves as the lower part of the "C"-shaped arc plate, which is perpendicular to the first planar connecting segment 3-1, and the central axes of the second planar connecting segment 3-3, the semicircular arc surface connecting segment 3-2, and the central axis of the cylinder are located in the same vertical plane.

[0059] In this embodiment, the energy conversion component is preferably a friction nanogenerator, which mainly includes a base 4, a lower friction disk 5 and an upper friction disk 6. The lower friction disk 5 is located above the base 4, and the lower surface of the lower friction disk 5 is connected to the upper part of the base 4, and the upper surface of the lower friction disk 5 is provided with a first friction material; the lower end of the rotating shaft 1 passes through the lower friction disk 5 and is rotatably connected to the lower friction disk 5 through a bearing 9; the upper friction disk 6 is sleeved on the rotating shaft 1, and the upper end of the rotating shaft 1 is connected to the second planar connecting section 3-3, and the upper friction disk 6 is located between the second planar connecting section 3-3 and the lower friction disk 5; the lower surface of the upper friction disk 6 is provided with a second friction material with a friction electric polarity different from that of the first friction material, the upper friction disk 6 and the lower friction disk 5 are arranged at intervals, and the distance between the lower surface of the upper friction disk 6 and the upper surface of the lower friction disk 5 is very small, but the distance between the upper friction disk 6 and the lower friction disk 5 can ensure the generation of friction electrification and electrostatic induction. The second planar connecting section 3-3 of the arc plate 3 is connected to the friction nanogenerator through the rotating shaft 1. When the eddy current in the water passes through, it will cause the vortex-induced oscillation assembly to swing as a whole and drive the rotating shaft 1 to twist, thereby driving the upper friction disk 6 to rotate relative to the lower friction disk 5, so that the materials with different friction electric polarities between the upper friction disk 6 and the lower friction disk 5 are constantly in contact and separated, thereby generating current and realizing the conversion of mechanical energy to electrical energy. The friction nanogenerator has a simple structure and can perform electromechanical energy conversion through vortex-induced oscillation. It has the advantages of rich material selection, small size, light weight, easy manufacturing and installation, etc.

[0060] In this embodiment, the rotating shaft 1 can be set as a two-stage stepped shaft, which includes a coaxially arranged lower shaft section and an upper shaft section, and the diameter of the lower shaft section is larger than the diameter of the upper shaft section; the bearing 9 is sleeved on the lower shaft section, and the inner ring of the bearing 9 is interference fit with the lower shaft section, the lower friction disc 5 is sleeved outside the outer ring of the bearing 9, and the outer ring of the bearing 9 is interference fit with the lower friction disc 5; the upper friction disc 6 is sleeved on the upper shaft section and is interference fit with the upper shaft section. When setting the lower friction disc 5, it should be ensured that the upper surface of the lower friction disc 5 and the upper surface of the bearing 9 are located in the same plane, and it should be ensured that the distance between the upper friction disc 6 and the lower friction disc 5 can generate friction electrification and electrostatic induction.

[0061] The cylinder and the "C"-shaped arc plate of the vortex-induced oscillation assembly of this embodiment can be regarded as a rigid body after being connected. After the upper and lower ends of the "C"-shaped arc plate are respectively connected to the cylinder (i.e., columnar body 2) and the rotating shaft 1, the cylinder (i.e., columnar body 2) of the vortex-induced oscillation assembly is coaxial with the rotating shaft 1. In order to ensure that the cylinder (i.e., columnar body 2) is coaxial with the rotating shaft 1, a slot 1-1 is provided at the upper end of the upper shaft section through its central axis in this embodiment. The slot 1-1 runs through the radial direction of the upper shaft section and extends along the axial direction of the upper shaft section. The two slot surfaces of the slot 1-1 are symmetrically distributed with the central axis of the upper shaft section as the center. The second planar connecting section 3-3, as the lower vertical part of the arc plate 3, is inserted into the slot 1-1, and the two side surfaces of the second planar connecting section 3-3 are respectively in contact with the two slot surfaces of the slot 1-1. In order to ensure a compact and reliable connection, an interference fit is adopted between the second planar connecting section 3-3 and the slot 1-1, and then reinforced by bolts or screws to meet the requirement that the rotation center of the rotating shaft 1 coincides with the rotation center of the cylinder (i.e., columnar body 2). In this embodiment, it is preferred that the second planar connecting section 3-3 and the slot 1-1 are reinforced by two screws 7.

[0062] In this embodiment, the lower end of the rotating shaft 1 passes through the lower friction plate 5 and is connected to a nut 8 to limit the axial movement of the bearing 9, especially to prevent the bearing 9 from moving downward and destroying the distance between the upper friction plate 6 and the lower friction plate 5.

[0063] In this embodiment, the upper friction disc 6 and the lower friction disc 5 are circular friction discs with the same diameter, wherein: the lower surface of the upper friction disc 6 is evenly divided into eight upper fan-shaped areas 6-1 by very fine grooves 12, the second friction material can include a plurality of friction materials with the same triboelectric polarity but different specific materials, and the second friction material with the same triboelectric polarity and the same material is laid in any two diagonally arranged upper fan-shaped areas 6-1, and the second friction material with the same triboelectric polarity and different materials is laid in any two adjacent upper fan-shaped areas 6-1; the upper surface of the lower friction disc 5 is evenly divided into four lower fan-shaped areas 5-1 by very fine grooves 12, and the first friction material is laid in only one pair of relatively arranged lower fan-shaped areas 5-1, and the first friction material is not laid in the other pair of relatively arranged two lower fan-shaped areas 5-1. The above-mentioned first friction material and the second friction material are both triboelectric material films, which are attached to the corresponding fan-shaped areas.

[0064] In this embodiment, the electrode can be arranged on the lower friction disk 5 to form a single-electrode friction nanogenerator.

[0065] The power generation device 100 based on vortex-induced oscillation in this embodiment is essentially a torsional vibration superposition generator based on vortex-induced oscillation. When in use, the lower friction disc 5 is first fixed to the base 4 by screws, and then the base 4 is fixed to the bottom of the water or other supporting objects in the water, so that the entire vortex-induced oscillation power generation device 100 is immersed in water. There are a large number of water flows and vortices in the water. The vortices in any direction can drive the vortex-induced oscillation component as a whole to produce vortex-induced oscillation motion, thereby driving the rotating shaft 1 to rotate, so that the upper and lower friction discs 6 with materials with different friction electrical polarities rotate back and forth (twist) relative to the lower friction disc 5, so that the materials with different friction electrical polarities are constantly in contact and separation, realizing "torsional vibration superposition", thereby continuously generating current and realizing the conversion of mechanical energy into electrical energy. The array arrangement can gather the electrical energy generated by each independent power generation device 100 based on vortex-induced oscillation, greatly improving the output efficiency.

[0066] The dimensions of the columnar body 2 and the arc plate 3 of the vortex-induced oscillation assembly are designed to achieve the torsional vibration coupling superposition effect. In the two-degree-of-freedom system, the frequency response function matrix is ​​as follows:

[0067]

[0068] in:

[0069] c 1 、c 2 The damping provided to the fluid, also known as the damping coefficient;

[0070] c e is the bearing damping;

[0071] Stiffness coefficient k θ is the torsional stiffness coefficient of the corresponding structure;

[0072] Angular displacement θ 1 ,θ 2 is the angular displacement relative to the equilibrium position;

[0073] ω is the torsional vibration frequency;

[0074] J 2 is the moment of inertia of the cylindrical disturbing fluid;

[0075] J 1 is the moment of inertia of the curved plate and the connecting shaft;

[0076]

[0077]

[0078]

[0079] The corresponding mode vector When the damping, the width of the arc plate 3 and the diameter of the columnar body 2 are cylindrical, the phase lag and satisfaction caused by

[0080] ∠H 1弧形板 +∠H 1柱状体 +∠H 1阻尼 =2kπ+π

[0081] When , the structure is reverse coupled and cannot produce amplified torsional vibration, so it is necessary to avoid nearby size ratios.

[0082] Embodiment 2

[0083] This embodiment proposes a power generation system 200, including multiple power generation devices 100 based on vortex-induced oscillation as disclosed in Example 1, and all the power generation devices 100 based on vortex-induced oscillation are evenly arranged. The combined use of multiple power generation devices 100 based on vortex-induced oscillation can aggregate the electric energy generated by each independent power generation device 100 based on vortex-induced oscillation, thereby greatly improving the output efficiency.

[0084] Furthermore, in this embodiment, it is preferred that all the vortex-induced oscillation-based power generation devices 100 in the power generation system 200 are evenly distributed in an array, such as a 3×3 array or a 2×3×2 array. In actual operation, the array arrangement of all the vortex-induced oscillation-based power generation devices 100 in the power generation system 200 can be arranged in a variety of ways, such as 5×4, 2×3×4, etc. The number of rows and columns of the array, as well as the number of power generation devices in each row and column can be adaptively adjusted according to actual conditions.

[0085] Arranging the power generation devices 100 based on vortex-induced oscillation in an array can greatly increase the output power, so the power generation system 200 is more efficient in collecting mechanical energy.

[0086] Embodiment 3

[0087] This embodiment proposes another power generation device 100 based on vortex-induced oscillation, which is different from the first embodiment only in that the energy conversion component of this embodiment adopts an electromagnetic power generation device, such as Fig.10 As shown, the electromagnetic power generation device includes a housing 10, a magnet as a stator and a coil as a rotor. The magnet is arranged in the housing 10 to generate a fixed magnetic field; the coil is arranged in the housing 10 and is located in the fixed magnetic field. The coil is connected to the lower end of the rotating shaft 1 through a connecting rod and a coupling 11 as a rotor. Among them, the connection mode and positional relationship between the rotating shaft 1 and the second planar connecting section 3-3 are the same as those in the first embodiment, and are not repeated here. The columnar body 2 and the "C"-shaped arc plate can be regarded as a rigid body after being connected. The "C"-shaped arc plate is connected to the rotating shaft 1, and the rotating shaft 1 is connected to the rotor conductor of the electromagnetic power generation device. When the eddy current in the water passes through, it will cause the vortex-induced swing assembly to swing as a whole and drive the rotating shaft 1 to twist, so that the rotor conductor in the electromagnetic power generation device based on the electromagnetic induction law cuts the magnetic flux line, thereby generating an induced voltage and realizing the conversion from mechanical energy to electrical energy. The electromagnetic power generation device is also called an "electromagnetic energy collector". It has a simple structure and has the advantages of high frequency, high current, low impedance, high efficiency and low cost. The power generation principle of the above-mentioned electromagnetic power generation device is prior art and will not be described in detail here.

[0088] The power generation device 100 based on vortex-induced oscillation in this embodiment is essentially a torsional vibration superposition generator based on vortex-induced oscillation. When in use, the electromagnetic power generation device is first placed on the bottom of the water or other supporting objects in the water, so that the entire vortex-induced oscillation power generation device 100 is immersed in the water. There are a large number of water flows and eddies in the water. Eddies in any direction can drive the vortex-induced oscillation component as a whole to produce vortex-induced oscillation motion, thereby driving the rotating shaft 1 to rotate back and forth, so that the rotor conductor reciprocates to cut the magnetic flux lines, realizing "torsional vibration superposition", thereby continuously generating current and realizing the conversion of mechanical energy into electrical energy. The power generation device 100 based on vortex-induced oscillation has a simple structure, and water flows in any direction can form vortex-induced oscillation motion, so the vortex can be maximized. The array arrangement can gather the electrical energy generated by each independent power generation device 100 based on vortex-induced oscillation, greatly improving the output efficiency.

[0089] Embodiment 4

[0090] This embodiment proposes a power generation system 200, including multiple power generation devices 100 based on vortex-induced oscillation as disclosed in Example 3, and all the power generation devices 100 based on vortex-induced oscillation are evenly arranged. The combination of multiple power generation devices 100 based on vortex-induced oscillation can aggregate the electric energy generated by each independent power generation device 100 based on vortex-induced oscillation, thereby greatly improving the output efficiency.

[0091] Furthermore, in this embodiment, it is preferred that all the vortex-induced oscillation-based power generation devices 100 in the power generation system 200 are evenly distributed in an array, such as a 3×3 array or a 2×3×2 array. In actual operation, the array arrangement of all the vortex-induced oscillation-based power generation devices 100 in the power generation system 200 can be arranged in a variety of ways, such as 5×4, 2×3×4, etc. The number of rows and columns of the array, as well as the number of power generation devices in each row and column can be adaptively adjusted according to actual conditions.

[0092] Arranging the power generation devices 100 based on vortex-induced oscillation in an array can greatly increase the output power, so the power generation system 200 is more efficient in collecting mechanical energy.

[0093] In addition to the above array arrangement, the power generation device 100 based on vortex-induced oscillation in the power generation system 200 of this embodiment can also be arranged uniformly around the circumference.

[0094] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0095] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A power generation device based on vortex-induced oscillation, It is characterized in that include: An energy conversion component, the energy conversion component is used to convert mechanical energy into electrical energy, and includes a rotating shaft capable of driving the energy conversion component to operate; A vortex-induced oscillation component, wherein the vortex-induced oscillation component comprises a column and an arc plate, wherein one end of the arc plate is connected to an axial end of the column, and the other end of the arc plate is connected to the rotating shaft; the vortex-induced oscillation component can swing under the action of vortex in water and drive the rotating shaft to twist, so that the energy conversion component can operate and convert mechanical energy into electrical energy; the column is a cylinder, and the arc plate is a "C"-shaped arc plate, and the "C"-shaped arc plate comprises a first planar connecting section, a semicircular arc surface connecting section and a second planar connecting section arranged in sequence, wherein the first planar connecting section is tangent to the semicircular arc surface connecting section, and the first planar connecting section is connected to an axial end of the column, and the second planar connecting section is perpendicular to the first planar connecting section, and the central axes of the second planar connecting section, the semicircular arc surface connecting section and the central axis of the cylinder are located in the same plane.

2. The power generation device based on vortex-induced oscillation according to claim 1, It is characterized in that The energy conversion component is a friction nanogenerator, which includes: Base; A lower friction disc, wherein the lower friction disc is located above the base, and a lower surface of the lower friction disc is connected to an upper portion of the base, and an upper surface of the lower friction disc is provided with a first friction material; The rotating shaft, the lower end of which passes through the lower friction plate and is rotatably connected to the lower friction plate through a bearing; An upper friction disk, wherein the upper friction disk is sleeved on the rotating shaft, the upper end of the rotating shaft is connected to the second planar connecting section, and the upper friction disk is located between the second planar connecting section and the lower friction disk; a second friction material having a friction electrical polarity different from that of the first friction material is provided on the lower surface of the upper friction disk, the upper friction disk is spaced apart from the lower friction disk, and the distance between the upper friction disk and the lower friction disk can ensure the generation of friction electrification and electrostatic induction.

3. The power generation device based on vortex-induced oscillation according to claim 2, It is characterized in that The rotating shaft is a two-stage stepped shaft, which includes a coaxially arranged lower shaft section and an upper shaft section, and the diameter of the lower shaft section is larger than the diameter of the upper shaft section; the bearing is sleeved on the lower shaft section, and the inner ring of the bearing is interference fit with the lower shaft section, and the lower friction disk is sleeved outside the outer ring of the bearing, and the outer ring of the bearing is interference fit with the lower friction disk; the upper friction disk is sleeved on the upper shaft section and is interference fit with the upper shaft section; a groove is provided at the upper end of the upper shaft section through its central axis, and the groove penetrates the radial direction of the upper shaft section and extends along the axial direction of the upper shaft section; the second planar connecting section is inserted into the groove, the second planar connecting section is interference fit with the groove, and is reinforced by bolts.

4. The power generation device based on vortex-induced oscillation according to claim 2 or 3, It is characterized in that The lower end of the rotating shaft passes through the lower friction plate and is connected with a nut to limit the downward movement of the bearing.

5. The power generation device based on vortex-induced oscillation according to claim 2 or 3, It is characterized in that The upper friction disc and the lower friction disc are circular friction discs with the same diameter, wherein: The lower surface of the upper friction disc is evenly divided into eight upper fan-shaped areas by grooves, and any two diagonally arranged upper fan-shaped areas are paved with the second friction material of the same triboelectric polarity and the same material, and any two adjacent upper fan-shaped areas are paved with the second friction material of the same triboelectric polarity and different materials; The upper surface of the lower friction plate is equally divided into four lower sector-shaped areas by the grooves, and the first friction material is laid only in a pair of the lower sector-shaped areas that are arranged opposite to each other.

6. The power generation device based on vortex-induced oscillation according to claim 3, It is characterized in that The energy conversion component is an electromagnetic power generation device, which includes: shell; A magnet, which is disposed in the housing and is used to generate a fixed magnetic field; The coil is arranged in the housing and located in the fixed magnetic field. The coil serves as a rotor and is connected to the lower end of the rotating shaft through a connecting rod and a coupling in sequence.

7. The power generation device based on vortex-induced oscillation according to claim 6, It is characterized in that A slot is provided at the upper end of the rotating shaft through its central axis, the slot runs through the radial direction of the rotating shaft and extends along the axial direction of the rotating shaft; the second planar connecting section is inserted into the slot, the second planar connecting section has an interference fit with the slot, and is reinforced by bolts.

8. A power generation system, It is characterized in that It comprises a plurality of power generation devices based on vortex-induced oscillation as described in any one of claims 1 to 7, and all of the power generation devices based on vortex-induced oscillation are distributed in an array.

Images