Vane-free wind power generation device based on vortex-induced vibration and dynamic regulation and control and regulation and control method

Abstract

The invention discloses a blade-free wind power generation device based on vortex-induced vibration and dynamic regulation and control and a regulation and control method. The blade-free wind power generation device comprises an energy capturing mechanism, a support, a dynamic regulation and control system and a power generation mechanism. The energy capturing mechanism, the power generation mechanism and the dynamic regulation and control system are all installed on the support. The energy capturing mechanism is arranged outside the support and is blown by wind to vibrate so that wind energy can be converted into mechanical energy. The power generation mechanism is arranged in the middle of the support and converts mechanical energy into electric energy. And the dynamic regulation and control system is used for regulating and controlling the vibration amplitude of the energy capturing mechanism at different wind speeds, so that the generated power of the energy capturing mechanism is kept stable. Compared with the prior art, the blade-free wind power generation method has the advantages that more stable electric energy output is realized by dynamically regulating and controlling the tightness of the mooring rope, the efficient, stable and environment-friendly blade-free wind power generation device is provided, and the maintenance cost is lower.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind energy industry, and in particular to a bladeless wind power generation device based on vortex-induced vibration and dynamic regulation and a regulation method. BACKGROUND

[0002] Traditional blade-type wind turbines convert the rotating mechanical energy of the blades into electrical energy through electromagnetic induction, which has high requirements for wind speed, and are usually placed in coastal, offshore and other high-wind areas, which has defects such as noise pollution, bird impact risk and high maintenance cost. The new bladeless wind turbine uses an electromagnetic wind vibration energy collection device to convert wind energy into mechanical energy through vortex-induced vibration when fluid passes through a circular cross-section obstacle in a natural wind field, and then converts the mechanical energy into electrical energy.

[0003] The existing technology of bladeless wind power generation has the following problems: low energy conversion efficiency, fixed structure cannot adapt to changes in wind speed, resulting in fluctuation of energy capture efficiency; insufficient environmental adaptability, lack of dynamic regulation mechanism in low wind speed or strong wind environment; poor mechanical stability, long-term vibration easily leads to structural fatigue, affecting the service life of the equipment. Therefore, it is necessary to provide a bladeless wind power generation device based on vortex-induced vibration and dynamic regulation and a regulation method to avoid these problems. SUMMARY

[0004] In order to overcome the above-mentioned defects and shortcomings of the prior art, the purpose of the present application is to provide a bladeless wind power generation device based on vortex-induced vibration and dynamic regulation and a regulation method.

[0005] The present application solves the problems of low energy conversion efficiency and stability in the prior art through vortex-induced vibration and dynamic regulation technology, realizes efficient, stable and environmentally friendly bladeless wind power generation. Under different wind speeds, through dynamic adjustment of the energy capture mechanism, efficient wind energy capture and low noise power generation are realized, which is suitable for urban buildings, low wind speed areas and ecologically sensitive areas.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] A bladeless wind power generation device based on vortex-induced vibration and dynamic regulation, comprising an energy capture mechanism, a support, a dynamic regulation system and a power generation mechanism; the energy capture mechanism, the power generation mechanism and the dynamic regulation system are all installed on the support;

[0008] The energy capture mechanism is arranged outside the support and is vibrated by wind to convert wind energy into mechanical energy;

[0009] The power generation mechanism is arranged in the middle of the support to convert mechanical energy into electrical energy;

[0010] The dynamic regulation system is used for regulating the vibration amplitude of the energy capturing mechanism under different wind speeds, so that the power generation of the energy capturing mechanism remains stable.

[0011] Further, the support includes a fixed seat, a movable seat, a base, a mounting seat and a support rod, the fixed seat, the movable seat and the base are connected through the support rod, the stabilizing plate is arranged on the support rod, the fixed seat is arranged at the upper end of the support, and the base is arranged on the ground through the mounting seat.

[0012] Further, the energy capturing mechanism includes an outer tube and a fixed support, the outer tube is sleeved outside the support through the fixed support, the fixed support includes two horn-shaped fixing frames, a plurality of magnet frames are arranged between the two horn-shaped fixing frames, and a ball ring and a through hole are arranged at the small opening part of the horn-shaped fixing frame.

[0013] Further, the dynamic regulation system includes a motor, a screw rod and a cable, the motor drives the screw rod to rotate, the screw rod drives the movable seat to move on the support, the diameter of the cable is the same as that of the through hole, and the two ends of the cable are respectively connected with the fixed seat and the movable seat through the fixed support.

[0014] Further, the power generation mechanism includes a magnetic oscillator, a copper coil, a coil partition plate, a coil fixing plate and a shock absorbing spring, the magnetic oscillator is installed on the magnet frame, the copper coil is installed on the support through the coil fixing plate, and a plurality of layers corresponding to the magnetic oscillator are formed through the coil partition plate.

[0015] Further, the shock absorbing spring is arranged between the coil fixing plate and the coil partition plates at the uppermost side and the lowermost side.

[0016] Further, the coil fixing plate is provided with an annular groove, and the ball ring moves on the annular groove.

[0017] Further, the support further includes a stabilizing plate, and the stabilizing plate is arranged at a weak strength position of the support rod.

[0018] Further, the magnetic oscillator is installed with different magnetic poles between adjacent two layers.

[0019] A regulation method based on the bladeless wind power generation device, comprising:

[0020] The dynamic control system obtains the current wind speed through the wind speed sensor, controls the motor to operate through the external controller according to the size of the current wind speed, drives the screw to rotate forward or reversely, the screw cooperates with the internal thread between the screw and the movable seat, the rotation of the screw drives the movable seat to move on the support, adjusts the tightness of the cable, the diameters of the cables arranged in the small holes of the fixed support are the same, so that the vibration conditions of the energy capturing mechanism and the cable are consistent, when the movable seat moves upward by the motor, the cable becomes loose, the energy capturing mechanism can vibrate more greatly, when the movable seat moves downward by the motor, the cable becomes tight, so that the energy capturing mechanism can only vibrate slightly, when the device works, the vibration condition of the magnetic vibrator changes with the energy capturing mechanism, and the vibration condition of the energy capturing mechanism is affected by the tightness of the adjusted cable.

[0021] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0022] (1) According to the different wind speed, the dynamic control system is used to adjust the amplitude and frequency of the vortex-induced vibration of the energy capturing mechanism, so that the vibration frequency of the energy capturing mechanism is consistent with the frequency of the vortex shedding of the wind, and more stable and efficient power generation efficiency can be provided at different wind speeds.

[0023] (2) The wind speed sensor detects the change of the external wind speed, and the external controller automatically controls the dynamic control system, the motor drives the threaded pipe to rotate, controls the upward movement or the downward movement of the movable seat, thereby adjusting the tightness of the cable, and adjusting the amplitude and frequency of the vortex-induced vibration of the energy capturing mechanism. When the wind speed is low, the cable is automatically adjusted to be loose, the energy capturing mechanism is more easily vibrated, more wind energy is captured, and the power generation efficiency is effectively increased; when the wind speed is high, the cable is automatically adjusted to be tight, the amplitude of the vortex-induced vibration of the energy capturing mechanism is reduced, the power generation device itself is protected, and the power generation device is prevented from being damaged due to the too large vibration amplitude of the energy capturing mechanism when the wind speed is high.

[0024] (3) The external controller program is designed, the output end of the program is the rotation of the motor, the external controller can stably control the forward and reverse rotation time of the motor according to the wind speed transmitted by the wind speed sensor, the tightness of the cable is effectively automatically controlled, the vibration of the energy capturing mechanism is adjusted according to the current wind speed, and the power generation efficiency is improved.

[0025] (4) The power generation mechanism with the multi-layer magnetic vibrator and the multi-layer copper coil structure is used, when the energy capturing mechanism vibrates, the closed coil can efficiently cut the magnetic induction line motion, and the power generation efficiency is further improved. The energy capturing mechanism is provided with a ball ring on both sides of the fixed support, the ball ring moves on the annular groove of the coil fixed plate, and the friction during the vibration of the energy capturing assembly is reduced. The outer cylinder of the energy capturing mechanism is made of light material, and the magnetic pole distribution between adjacent two layers of magnetic vibrators is opposite, the pressure on the ball ring is reduced through the same-pole repulsion principle, the friction during the vibration of the energy capturing assembly is further reduced, and the service life of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present application;

[0027] Fig. 2(a) and Fig. 2(b) are respectively a disassembled view of the present application and a perspective view of the energy capturing mechanism;

[0028] Figure 3 is a partial cross-sectional view of the present application when the energy capturing mechanism and the support are assembled;

[0029] Figure 4 is a partial enlarged view of the energy capturing mechanism fixing support at A in Fig. 2(a) of the present application;

[0030] Figure 5 is a partial enlarged view of the support and the dynamic control system at B in Fig. 2(b) of the present application;

[0031] Figure 6 is a partial enlarged view of the power generation mechanism at C in Fig. 2(b) of the present application;

[0032] Figure 7 is a flow chart of the control method provided by the present application.

[0033] shown in the figure are:

[0034] 1 - energy capturing mechanism, 11 - outer tube, 12 - fixing support, 13 - through hole, 14 - magnet holder, 15 - ball ring, 2 - support, 21 - fixed seat, 22 - movable seat, 23 - base, 24 - mounting seat, 25 - stabilizing plate, 26 - support rod, 3 - dynamic control system, 31 - motor, 32 - motor fixing seat, 33 - screw rod, 34 - wind speed sensor, 35 - cable, 4 - power generation mechanism, 41 - magnetic oscillator, 42 - copper coil, 43 - coil partition, 44 - coil fixing plate, 45 - shock absorbing spring. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below in conjunction with examples, but the embodiments of the present application are not limited thereto.

[0036] Examples

[0037] As Figure 1As shown in Figures 2(a) and 2(b), a bladeless wind power generation device based on vortex-induced vibration and dynamic control includes an energy harvesting mechanism 1, a support frame 2, a dynamic control system 3, and a power generation mechanism 4. The energy harvesting mechanism 1, the dynamic control system 3, and the power generation mechanism 4 are all mounted on the support frame 2. The energy harvesting mechanism 1 is fitted onto the outside of the support frame 2 and generates vortex-induced vibration when blown by the wind, thereby converting wind energy into mechanical energy. The power generation mechanism 4 is installed in the middle of the support frame 2 and converts mechanical energy into electrical energy. The dynamic control system 3 is installed both above and below the support frame 2 and is used to control the vibration amplitude of the energy harvesting mechanism 1 under different wind speeds.

[0038] Referring to Figures 2(a) and 2(b), Figure 3 and Figure 4 As shown, the energy harvesting mechanism 1 includes an outer tube 11 and a fixed support 12. The outer tube 1 is made of lightweight materials such as glass fiber or carbon fiber. The fixed support 12 includes two horn-shaped fixing frames with opposite horn openings. A multi-layer magnet frame 14 is arranged between the smaller openings of the two horn-shaped fixing frames, and the magnetic resonators 41 in the power generation mechanism 4 are mounted on the magnet frame 14. The smaller openings of the horn-shaped fixing frames are the upper and lower ends of the fixing frames, and ball rings 15 and through holes 13 are provided. The outer tube 11 is fitted onto the outside of the support 2 through the fixed support 12 and is connected to the power generation mechanism 4 through the ball rings 15. When the wind blows, the outer tube 11 undergoes vortex-induced vibration, and the ball rings 15 are used to reduce the friction between the fixed support 12 and the support 2. The outer tube 11 is made of lightweight materials, and the magnetic poles of adjacent layers of magnetic resonators 41 are distributed in opposite directions. Through the principle of like poles repulsion, the pressure on the ball rings 15 is reduced, and the service life of the device is improved.

[0039] Referring to Figures 2(a) and 2(b) and Figure 5 As shown, the support frame 2 includes a fixed base 21, a movable base 22, a base 23, a mounting base 24, a stabilizing plate 25, and a support rod 26. The fixed base 21, movable base 22, and base 23 are connected by the support rod 26. The support rod 26 consists of three cylindrical rods, vertically mounted on the base 23 in a stable equilateral triangle distribution. The stabilizing plate 25 is installed at the weakest points to improve the strength and stability of the support frame 2 during operation. The fixed base 21 is mounted on the upper end of the support frame 2, the movable base 22 is mounted on the lower end of the support frame 2, and the base 23 and mounting base 24 are located at the bottom of the support frame 2. The mounting bases 24, distributed on the base 23, allow the support frame 2 to be reliably mounted to the ground as a whole using screws.

[0040] The dynamic control system 3 includes a motor 31, a motor mounting base 32, a screw 33, a wind speed sensor 34, and a cable 35. The motor 31 is mounted below the movable base 22 via the motor mounting base 32. The motor 31 drives the screw 33 to rotate, and the screw 33 engages with the internal thread in the middle of the movable base 22. In this embodiment, the wind speed sensor 34 is mounted above the mounting base 21; however, the wind speed sensor 34 can also be mounted separately from the device. The cable 35 is connected at both ends to the mounting base 21 and the movable base 22 respectively and is vertically mounted in the middle of the bracket 2. The cable 35 passes through the through holes 13 at both ends of the mounting bracket 12, and the diameter of the through holes 13 matches the diameter of the cable 35, ensuring that the vibration of the energy harvesting mechanism 1 and the cable 35 remains consistent.

[0041] In this embodiment, the dynamic control system 3 receives the wind speed signal from the wind speed sensor 34 through an external controller and controls the motor 31 to operate. The motor 31 drives the screw 33 to rotate forward or backward. Through the internal thread of the movable seat 22, the movable seat 22 moves up and down on the bracket 2, thereby adjusting the tension of the cable 35. Through the small through hole 13 on the fixed bracket 12 of the energy harvesting mechanism 1, the vibration of the energy harvesting mechanism 1 and the cable 35 are kept consistent, thus achieving effective control of the vortex-induced vibration of the energy harvesting mechanism 1.

[0042] Referring to Figures 2(a) and 2(b), Figure 4 and Figure 6 As shown, the power generation mechanism 4 includes a magnetic resonator 41, a copper coil 42, a coil partition 43, a coil fixing plate 44, and a damping spring 45. The magnetic resonator 41 is mounted on the magnet frame 14 of the energy harvesting mechanism 1. The copper coil 42 is mounted in the middle of the support 2 via the coil fixing plate 44, forming a multi-layered structure corresponding to the magnetic resonator 41 via the coil partition 43. A damping spring 45 is installed between the coil fixing plate 44 and the coil partition 43 to buffer the impact generated during operation. The multi-layered magnetic resonator 41 mounted in the middle of the energy harvesting mechanism 1 and the multi-layered copper coil 42 mounted in the middle of the support 2 form a magnet-coil-magnet... structure, creating a contactless electromagnetic field generator.

[0043] To further explain, the coil separator divides the copper coil into multiple layers, so that there is a layer of copper coil between every two layers of magnets.

[0044] When wind blows, the outer tube 11 of the energy harvesting mechanism 1 undergoes vortex-induced vibration, creating a horizontal relative motion with the support 2. The magnetic resonator 41 and copper coil 42, respectively mounted on both, undergo electromagnetic induction, thereby generating electrical energy. The coil fixing plate 44 has an annular groove, within which the ball rings 15 mounted on the upper and lower sides of the fixing support 12 can move. When the device is working, i.e., when the energy harvesting mechanism 1 undergoes vortex-induced vibration, the ball rings 15 greatly reduce the friction between the fixing support 12 and the coil fixing plate 44, thus improving the device's service life.

[0045] The energy capture principle of a bladeless wind power generation device based on vortex-induced vibration and dynamic control is as follows: When the wind flows through the energy capture mechanism 1, vortices fall off downstream of the outer pipe 11, causing the energy capture mechanism 1 to undergo vortex-induced vibration, converting wind energy into mechanical energy. During operation, the magnetic resonator 41 vibrates with the energy capture mechanism 1, and the copper coil 42 is fixed to the support 2 via a coil fixing plate 44. The vortex-induced vibration of the energy capture mechanism 1 causes the magnetic resonator 41 on the fixed support 12 to move horizontally relative to the support 2. The magnetic resonator 41 and the copper coil 42 in the middle of the support 2 cut magnetic field lines, using electromagnetic induction to convert mechanical energy into electrical energy.

[0046] The dynamic control method is as follows: The dynamic control system 3 obtains the current wind speed through the wind speed sensor 34. Based on the current wind speed, the external controller controls the motor 31 to operate, driving the screw 33 to rotate forward or backward. The screw 33 engages with the internal thread in the middle of the movable seat 22. The rotation of the screw 33 moves the movable seat 22 on the bracket 2, adjusting the tension of the cable 35. Since the small through hole 13 on the fixed bracket 12 has the same diameter as the cable 35, the vibration of the energy harvesting mechanism 1 and the cable 35 remains consistent. When the motor 31 moves the movable seat 22 upward, the cable 35 loosens, and the energy harvesting mechanism 1 can vibrate more significantly; when the motor 31 moves the movable seat 22 downward, the cable 35 tightens, and the energy harvesting mechanism 1 can only vibrate slightly. When the device is working, the vibration of the magnetic resonator 41 changes with the energy harvesting mechanism 1, and the vibration of the energy harvesting mechanism 1 is affected by the adjusted tension of the cable 35. This method enables effective control of the vortex-induced vibration of the energy harvesting mechanism 1, facilitating more efficient and stable power generation by the device.

[0047] Reference Figure 7 As shown, the control method of the bladeless wind power generation device is dynamically controlled by an external controller, making the power generation efficiency more stable under different wind speeds. When the vibration frequency of the energy harvesting mechanism 1 matches the frequency of the eddy current shedding in the wind, a resonance-like phenomenon occurs, making the relative motion between the magnetoresistor 41 and the copper coil 42 most significant, providing higher power generation efficiency. Through the study of the vibration of the energy harvesting mechanism 1 at different wind speeds, a program for the external controller is designed. After acquiring the wind speed signal through the wind speed sensor 34, the motor 31 is controlled to move the movable seat 22, adjusting the tension of the cable 35 to make the vibration frequency of the energy harvesting mechanism 1 match the frequency of the eddy current shedding. In this way, the effective wind speed range for high-efficiency power generation of the device can be expanded, making the originally unstable power generation efficiency at different wind speeds more stable.

[0048] When the wind speed is low, the wind speed sensor 34 detects the low wind speed, and the motor 31 rotates the screw 33, causing the movable seat 22 to move upward. The cable 35 is then loosened, making it easier for the energy harvesting mechanism 1 to perform vortex-induced vibration, thus improving the power generation efficiency under low wind speed conditions. When the wind speed is within the normal range, the tension of the cable 35 is dynamically controlled to ensure that the vibration frequency of the energy harvesting mechanism 1 matches the frequency of eddy current shedding, maintaining high-efficiency power generation. When the wind speed is too high, the wind speed sensor 34 detects the excessively high wind speed, and the motor 31 rotates the screw 33, causing the movable seat 22 to move downward and tighten the cable 35. The tension of the cable 35 controls the amplitude of the vortex-induced vibration of the energy harvesting mechanism 1, ensuring high-efficiency power generation while preventing excessive amplitude of the energy harvesting mechanism 1 when the wind speed is too high, which could damage the power generation device and extend the device's service life.

[0049] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the embodiments described above. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A bladeless wind power generation device based on vortex-induced vibration and dynamic control, characterized in that, It includes an energy harvesting mechanism, a support frame, a dynamic control system, and a power generation mechanism; the energy harvesting mechanism, the power generation mechanism, and the dynamic control system are all mounted on the support frame; The energy harvesting mechanism is located outside the support frame and is vibrated by the wind to convert wind energy into mechanical energy. The power generation mechanism is located in the middle of the support frame and converts mechanical energy into electrical energy; The dynamic control system is used to regulate the vibration amplitude of the energy harvesting mechanism under different wind speeds, so as to keep the power generation of the energy harvesting mechanism stable.

2. The bladeless wind power generation device according to claim 1, characterized in that, The bracket includes a fixed seat, a movable seat, a base, a mounting seat, and a support rod. The fixed seat, the movable seat, and the base are connected by the support rod. The stabilizing plate is mounted on the support rod. The fixed seat is located at the upper end of the bracket. The base is used to mount the bracket on the ground.

3. The bladeless wind power generation device according to claim 2, characterized in that, The energy-capturing mechanism includes an outer tube and a fixed bracket. The outer tube is fitted onto the outside of the bracket through the fixed bracket. The fixed bracket includes two horn-shaped fixing frames, and a multi-layer magnet frame is provided between the two horn-shaped fixing frames. The small opening of the horn-shaped fixing frame is provided with a ball ring and a through hole.

4. The bladeless wind power generation device according to claim 3, characterized in that, The dynamic control system includes a motor, a screw, and a cable. The motor drives the screw to rotate, and the screw drives the movable seat to move on the support. The diameter of the cable is the same as the diameter of the through hole, and the two ends of the cable pass through the fixed support and are connected to the fixed seat and the movable seat, respectively.

5. The bladeless wind power generation device according to claim 3, characterized in that, The power generation mechanism includes a magnetic resonator, a copper coil, a coil partition, a coil fixing plate, and a damping spring. The magnetic resonator is mounted on a magnet frame, and the copper coil is mounted on a support through the coil fixing plate. The coil partition forms a multi-layer structure corresponding to the magnetic resonator.

6. The bladeless wind power generation device according to claim 5, characterized in that, A damping spring is provided between the coil fixing plate and the uppermost and lowermost coil partition plates.

7. The bladeless wind power generation device according to claim 5, characterized in that, The coil fixing plate is provided with an annular groove, and the ball ring moves on the annular groove.

8. The bladeless wind power generation device according to claim 2, characterized in that, The support also includes a stabilizing plate, which is placed at the weakest point of the support rod.

9. The bladeless wind power generation device according to claim 5, characterized in that, The magnetorons are mounted on adjacent layers with different magnetic poles.

10. A control method for a bladeless wind power generation device according to any one of claims 1-9, characterized in that, include: The dynamic control system obtains the current wind speed through a wind speed sensor. Based on the current wind speed, an external controller controls the motor to rotate, driving the screw to rotate forward or backward. The screw engages with the internal thread in the middle of the movable seat. The rotation of the screw moves the movable seat on the bracket, adjusting the tension of the cable. Because the small through hole of the fixed bracket is set with the same diameter as the cable, the vibration of the energy harvesting mechanism and the cable is kept consistent. When the motor moves the movable seat upward, the cable loosens, and the energy harvesting mechanism can vibrate more significantly; when the motor moves the movable seat downward, the cable tightens, and the energy harvesting mechanism can only vibrate slightly. When the device is working, the vibration of the magnetic resonator changes with the energy harvesting mechanism, and the vibration of the energy harvesting mechanism is affected by the adjusted tension of the cable.

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