Breeze type multi-vortex-surface blade-free wind power generation device

Abstract

The invention provides a breeze type multi-vortex-surface blade-free wind power generation device, which relates to the technical field of new energy wind power generation and comprises a single-layer hollow carbon fiber stand column, a vortex-induced vibration generation mechanism, a vibration transmission mechanism and a power conversion and power generation execution mechanism, the single-layer hollow carbon fiber stand column is made of a carbon fiber composite material; the vortex-induced vibration generating mechanism is a spiral shutter multi-vortex-surface wing strip fixed to the outer wall of the single-layer hollow carbon fiber stand column. By means of the special pneumatic structure design of the spiral shutter multi-vortex-surface wing strips and the matching of the specific size and streamline section parameters, stable alternating Karman vortex streets can be accurately induced, the multi-stage vortex street superposition effect is achieved, the excitation threshold is greatly reduced, 2.0 m / s ultralow wind speed starting is achieved, the dependence of a traditional fan on the high wind speed is thoroughly eliminated, and the wind power generation efficiency is improved. And the application range of low-wind-speed wind conditions is comprehensively widened.

Description

Technical Field

[0001] This invention relates to the field of new energy wind power generation technology, and in particular to a micro-wind type multi-vortex bladeless wind power generation device. Background Technology

[0002] As the global energy structure transitions towards clean and low-carbon energy, wind power, as a technologically mature and widely distributed renewable energy source, continues to increase its importance in the global energy supply system. Mainstream horizontal axis wind power technology has formed a complete industrial system and has achieved large-scale application in centralized wind farms, offshore wind power, and other scenarios. At the same time, with the continuous growth in demand for low-wind-speed wind resource development, vortex-induced vibration bladeless wind power generation technology based on the KAMAN vortex street principle has become an important research and development direction for technological innovation in the wind power field. The widespread application of mature vibration control technologies such as tuned mass damping systems in many fields, as well as the industry's continuous research and development in areas such as blunt body aerodynamic performance, vibration energy capture, and mechanical energy-to-electrical energy conversion, have laid the corresponding theoretical foundation and technological accumulation for the optimization and implementation of this type of wind energy utilization technology adapted to micro-wind environments. This invention is a micro-wind type multi-vortex bladeless wind power generation device.

[0003] Traditional wind power generation devices generally suffer from high starting wind speeds, low wind resource utilization at low wind speeds, and difficulty in achieving stable high-power generation in light wind environments. Summary of the Invention

[0004] This invention relates to a micro-wind type multi-vortex bladeless wind power generation device to solve the technical problems mentioned in the background art.

[0005] In a first aspect, this invention provides a micro-wind type multi-vortex bladeless wind power generation device, specifically comprising: a single-layer hollow carbon fiber column, a vortex-induced vibration generating mechanism, a vibration transmission mechanism, and a power conversion and power generation execution mechanism; the single-layer hollow carbon fiber column is made of carbon fiber composite material; a stationary peripheral rigid frame is axially arranged through the internal cavity of the single-layer hollow carbon fiber column, the bottom end of the stationary peripheral rigid frame is rigidly connected to a mounting base, the lower end of the single-layer hollow carbon fiber column is rigidly connected to a cover, a circumferential elastic support component is arranged between the cover and the mounting base, a central flexible suspension rope is axially arranged through the stationary peripheral rigid frame along the central axis of the single-layer hollow carbon fiber column; a tuned mass damping system is arranged on the stationary peripheral rigid frame; the natural frequency of the tuned mass damping system is precisely matched with the Karman vortex street shedding frequency at the rated wind speed, used to stabilize the vibration frequency and amplify the vibration stroke. The vortex-induced vibration generating mechanism is a spiral louvered multi-vortex wing fixed to the outer wall of a single-layer hollow carbon fiber column. It is used to actively induce the airflow flowing through the single-layer hollow carbon fiber column to form a stable alternating falling Karman vortex street, thereby strengthening the periodic transverse excitation force on both sides of the single-layer hollow carbon fiber column. The vibration transmission mechanism includes two sets of annular reinforcing frames arranged axially at intervals along the single-layer hollow carbon fiber column. The outer ring of the annular reinforcing frame is rigidly fixed to the inner wall of the single-layer hollow carbon fiber column and can generate transverse vibration synchronized with the detachment frequency of the Karman vortex street with the slight deformation of the single-layer hollow carbon fiber column. The power conversion and power generation actuator is connected to the central flexible suspension rope, which can sequentially convert the lateral vibration of the ring-shaped reinforcing frame into axial reciprocating linear motion and finally into electrical energy.

[0006] Furthermore, the stationary peripheral rigid frame is provided with upper and lower triangular support connecting plates and circumferentially distributed helical spring assemblies. The three apex corners of the upper and lower triangular support connecting plates are rigidly fixed to the stationary peripheral rigid frame. The circumferentially distributed helical spring assemblies are evenly arranged along the circumference of the stationary peripheral rigid frame. One end of each helical spring is rigidly fixed to the surface of the upper and lower triangular support connecting plates, and the other end is in contact with the tuned mass damping system at the corresponding position.

[0007] Furthermore, the tuned mass damping system can reciprocate synchronously along the axial direction of the single-layer hollow carbon fiber column as the circumferentially distributed helical spring assembly deforms. The tuned mass damping system is provided with an annular elastic ring on its outer periphery. When the vibration transmission mechanism sways laterally with the single-layer hollow carbon fiber column, it can come into contact with the annular elastic ring.

[0008] Furthermore, the bottom of the vibration transmission mechanism is fixedly connected to the central flexible suspension rope, and the vibration transmission mechanism also includes upper and lower conical support frames; the upper and lower conical support frames are symmetrical conical truss structures, the large-diameter end of the upper and lower conical support frames is rigidly connected to the corresponding annular reinforcing frame, the small-diameter end is fixed with a central guide shaft, an annular disk is fixed on the central guide shaft, the annular disk has guide through holes arranged in a circumferential array, and an elastic damping element passes through the guide through holes.

[0009] Furthermore, 12 spiral louvered multi-vortex airfoils are evenly arranged along the circumference of the single-layer hollow carbon fiber column, forming a continuous spiral structure without any breaks. The spiral louvered multi-vortex airfoil has a height of 0.18m, a helix angle of 22.5°, and a pitch of 4.5m. The spiral louvered multi-vortex airfoil adopts a streamlined cross-section with a symmetrical front rounded and rear pointed shape. The front edge of the cross-section is a rounded arc with a radius of 12mm, and the maximum thickness is 36mm, located at 30% of the chord length from the front edge. The rear edge of the back edge is a symmetrical sharp wedge-shaped tail with an included angle of 15°.

[0010] Furthermore, the power conversion and power generation actuator includes a movable seat and a permanent magnet linear generator; the movable seat moves up and down on the stationary peripheral rigid vertical frame, and a round rod is fixed at the lower end of the movable seat; the permanent magnet linear generator is mounted on the stationary peripheral rigid vertical frame, and the round rod at the lower end of the movable seat is connected to the central straight shaft of the permanent magnet linear generator through a coupling.

[0011] Furthermore, the permanent magnet linear generator is a 500kW-class generator that can directly convert the linear reciprocating motion of the movable seat into electrical energy.

[0012] Furthermore, the single-layer hollow carbon fiber column has an outer diameter of 2.8m, a wall thickness of 30mm, and an axial height of 38m, and is integrally molded using high-strength carbon fiber composite material.

[0013] Furthermore, the mounting base is equipped with a three-point anchoring assembly.

[0014] Furthermore, the device has a starting wind speed of 2.0 m / s, a rated wind speed of 3.5 m / s, a cut-off wind speed of 38 m / s, and a rated output power of 500 kW. It can be arranged in a high-density staggered configuration in onshore, nearshore, and deep-sea scenarios.

[0015] This invention provides a bladeless wind power generation device with a multi-vortex surface and a micro-wind characteristics, which has the following advantages: This application utilizes a proprietary aerodynamic structure design with spiral louvered multi-vortex airfoils, combined with the lightweight and high-rigidity characteristics of a single-layer hollow carbon fiber column, to achieve an ultra-low start-up wind speed of 2.0 m / s. This completely breaks through the dependence of conventional wind turbines on high wind speeds, adapting to the natural wind conditions of most regions with consistently low and fluctuating wind speeds throughout the year. This effectively extends the effective power generation time throughout the year, fully tapping into low-wind-speed wind energy resources that traditional wind turbines cannot utilize, and filling the technological gap in large-scale wind power generation in low-wind-speed areas. Simultaneously, relying on the synergistic cooperation of a tuned mass damping system and circumferentially distributed helical spring components, the tuned mass damping system can perform pure axial up-and-down reciprocating vibrations along the stationary outer rigid vertical frame. Combined with its own natural frequency precisely matched to the detachment frequency of the Karman vortex street, this achieves precise and stable control of the overall vibration frequency of the device, avoiding frequent... To address issues such as wind speed drift and vibration disorder, the effective vibration stroke is appropriately amplified to eliminate ineffective swaying and energy loss. The vibration transmission mechanism utilizes a symmetrical conical truss structure with upper and lower conical support frames, a central guide shaft, and elastic damping elements to achieve uniform distribution and limit correction of lateral vibration. Combined with the flexible contact buffer of the annular elastic ring, energy loss caused by rigid collisions is avoided, ensuring efficient transmission of vibration energy to the central flexible suspension rope. The power conversion and power generation actuator employs a 500kW permanent magnet linear generator, directly converting linear reciprocating mechanical energy into electrical energy. This eliminates intermediate transmission links such as gears and threads, achieving lossless and efficient energy conversion. The rated output power is consistently met. The entire process from wind energy capture and vibration transmission to power conversion is optimized and improved, significantly enhancing overall power generation efficiency.

[0016] Furthermore, the single-layer hollow carbon fiber column of this invention is integrally molded from high-strength carbon fiber composite material, with a specification design of 2.8m outer diameter, 30mm wall thickness, and 38m axial height. It balances lightweight design with high fatigue resistance and high wind load resistance, neither suppressing micro-amplitude lateral vibrations nor failing to withstand long-term reciprocating vibrations and extreme wind loads, thus avoiding the risk of deformation, cracking, and breakage. The tuned mass damping system, combined with the circumferentially distributed helical spring assembly, can effectively dissipate excess vibration energy, limit vibration amplitude, and prevent excessive shaking from damaging internal components. The 38m / s high cut-out wind speed design can achieve automatic shutdown protection under extreme wind conditions. The mounting base at the bottom of the stationary outer rigid vertical frame is anchored by a three-point anchoring assembly to ensure the stability of the entire machine installation. The overall structure has a long service life and low maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram: Figure 1A schematic diagram of the overall structure of the present invention is shown.

[0020] Figure 2 A schematic diagram of the internal structure of the single-layer hollow carbon fiber column of the present invention is shown.

[0021] Figure 3 A schematic diagram of the structure of the present invention, showing the static peripheral rigid frame and the tuned mass damping system in a coordinated installation state, is shown.

[0022] Figure 4 A schematic diagram of the static peripheral rigid vertical frame of the present invention is shown.

[0023] Figure 5 The present invention is shown Figure 2 A magnified structural diagram of part A in the middle.

[0024] Figure 6 The present invention is shown Figure 4 A magnified structural diagram of part B.

[0025] Figure 7 The present invention is shown Figure 3 A magnified structural diagram of section C.

[0026] Figure 8 A schematic diagram of the tuned mass damping system portion of the present invention is shown.

[0027] Figure 9 A schematic diagram of the vibration transmission mechanism of the present invention is shown.

[0028] Figure 10 The present invention is shown Figure 9 A magnified structural diagram of part D in the middle.

[0029] List of reference numerals 1. Single-layer hollow carbon fiber column; 11. Static outer rigid frame; 111. Upper and lower triangular support connecting plates; 112. Circumferentially distributed helical spring assembly; 113. Central flexible suspension rope; 12. Mounting base; 13. Cover; 14. Tuned mass damping system; 141. Annular elastic ring; 15. Circumferential elastic support assembly; 2. Vortex-induced vibration generating mechanism; 3. Vibration transmission mechanism; 31. Annular reinforcing frame; 32. Upper and lower conical support frame; 33. Central guide shaft; 331. Annular disk; 332. Elastic damping element; 4. Power conversion and generation actuator; 41. Movable seat; 42. Permanent magnet linear generator. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please refer to Figures 1 to 10 Example 1: This invention proposes a bladeless wind power generation device with a multi-vortex surface in a micro-wind environment, comprising: a single-layer hollow carbon fiber column 1, a vortex-induced vibration generating mechanism 2, a vibration transmission mechanism 3, and a power conversion and power generation execution mechanism 4; the single-layer hollow carbon fiber column 1 is made of carbon fiber composite material; a stationary outer rigid frame 11 is axially arranged through the internal cavity of the single-layer hollow carbon fiber column 1, the bottom end of the stationary outer rigid frame 11 is rigidly connected to a mounting base 12, the lower end of the single-layer hollow carbon fiber column 1 is rigidly connected to a cover 13, a circumferential elastic support assembly 15 is arranged between the cover 13 and the mounting base 12, and a central flexible suspension rope 113 is axially arranged through the stationary outer rigid frame 11 along the central axis of the single-layer hollow carbon fiber column 1; a tuned mass damping system 14 is arranged on the stationary outer rigid frame 11; the natural frequency of the tuned mass damping system 14 is precisely matched with the Karman vortex street shedding frequency at the rated wind speed, which is used to stabilize the vibration frequency and amplify the vibration stroke. The vortex-induced vibration generating mechanism 2 is a spiral louvered multi-vortex surface air slat fixed to the outer wall of the single-layer hollow carbon fiber column 1. It is used to actively induce the airflow flowing through the single-layer hollow carbon fiber column 1 to form a stable alternating falling Karman vortex street, thereby strengthening the periodic transverse excitation force on both sides of the single-layer hollow carbon fiber column. The vibration transmission mechanism 3 includes two sets of annular reinforcing frames 31 arranged axially along the single-layer hollow carbon fiber column 1. The outer ring of the annular reinforcing frame 31 is rigidly fixed to the inner wall of the single-layer hollow carbon fiber column 1, and can generate transverse vibration synchronized with the detachment frequency of the Karman vortex street with the slight deformation of the single-layer hollow carbon fiber column 1. The power conversion and power generation actuator 4 is connected to the central flexible suspension rope 113, which can sequentially convert the lateral vibration of the ring reinforcement frame 31 into axial reciprocating linear motion and finally into electrical energy.

[0032] In this embodiment of the invention, a static outer rigid frame 11 is provided with upper and lower triangular support connecting plates 111 and circumferentially distributed helical spring assemblies 112. The three apex corners of the upper and lower triangular support connecting plates 111 are rigidly fixed to the static outer rigid frame 11. The circumferentially distributed helical spring assemblies 112 are evenly arranged along the circumference of the static outer rigid frame 11. One end of each helical spring is rigidly fixed to the surface of the upper and lower triangular support connecting plates 111, and the other end contacts the tuned mass damping system 14 at the corresponding position. The tuned mass damping system 14 can be distributed circumferentially. The deformation of the helical spring assembly 112 causes synchronous reciprocating vibration along the axial direction of the single-layer hollow carbon fiber column 1. An annular elastic ring 141 is provided on the outer periphery of the tuned mass damping system 14. When the vibration transmission mechanism 3 oscillates laterally with the single-layer hollow carbon fiber column 1, it can contact the annular elastic ring 141. Its function is: the circumferentially distributed helical spring assembly 112, through contact with the tuned mass damping system 14, transmits the elastic deformation force to the tuned mass damping system 14, driving the tuned mass damping system 14 to perform precise synchronous reciprocating vibration along the axial direction of the single-layer hollow carbon fiber column 1. The vibration, while utilizing its own elastic properties, provides elastic restoring force for the axial movement of the tuned mass damping system 14, realizing the reciprocating transmission of vibration; the axial reciprocating movement of the tuned mass damping system 14, combined with its precise matching characteristics with the Karman vortex street shedding frequency at rated wind speed, achieves stable control of the device's vibration frequency and amplification of the effective vibration stroke, improving the conversion efficiency of wind energy to mechanical energy; the outer annular elastic ring 141 contacts the vibration transmission mechanism 3 when it sways laterally with the single-layer hollow carbon fiber column 1, on the one hand, buffering the impact force between the vibration transmission mechanism 3 and the tuned mass damping system 14 through elastic contact, avoiding structural wear and vibration energy loss caused by rigid contact, on the other hand, further dissipating excess vibration energy during device operation through elastic deformation, limiting the excessive lateral sway of the vibration transmission mechanism 3, and simultaneously assisting in stabilizing the overall vibration frequency of the device, ensuring that the lateral sway of the vibration transmission mechanism 3 can be accurately and stably transmitted to the subsequent power conversion mechanism, providing core elastic support and frequency stabilization damping guarantee for the device's micro-wind start-up and stable power generation, effectively improving the structural reliability and operational stability of the device.

[0033] In this embodiment of the invention, the bottom of the vibration transmission mechanism 3 is fixedly connected to the central flexible suspension rope 113. The vibration transmission mechanism 3 also includes upper and lower conical support frames 32. The upper and lower conical support frames 32 are symmetrical conical truss structures. The large-diameter end of the upper and lower conical support frames 32 is rigidly connected to the corresponding annular reinforcing frame 31. The small-diameter end is fixed with a central guide shaft 33. An annular disk 331 is fixed on the central guide shaft 33. The annular disk 331 has guide holes arranged in a circumferential array. An elastic damping element 332 passes through the guide holes. Its function is: the elastic damping element 332 arranged in a circumferential array can further help stabilize the vibration frequency of the device, dissipate excess energy in the vibration transmission process, and effectively buffer the lateral sway amplitude of the vibration transmission mechanism 3 to avoid excessive swaying and collision with surrounding components. The bottom of the vibration transmission mechanism 3 is fixedly connected to the central flexible suspension rope 113. The stable lateral vibration after the above-mentioned structural optimization can be accurately transmitted to the central flexible suspension rope 113, ensuring that the vibration energy is efficiently transmitted to the subsequent power conversion and power generation actuator 4, reducing energy loss.

[0034] In this embodiment of the invention, 12 spiral louvered multi-vortex airfoils are evenly arranged along the circumference of the single-layer hollow carbon fiber column 1, forming a continuous spiral structure without any breaks. The airfoil height of the spiral louvered multi-vortex airfoil is 0.18m, the helix angle is 22.5°, and the pitch is 4.5m. The spiral louvered multi-vortex airfoil adopts a streamlined cross-section with a symmetrical front rounded and rear pointed shape. The front edge of the cross-section is a rounded arc with a radius of 12mm, and the maximum thickness is 36mm, located at 30% of the chord length from the front edge. The rear edge of the cross-section is a symmetrical sharp wedge with an angle of 15°. Its function is as follows: 12 continuous, uninterrupted spiral louvered multi-vortex fins evenly arranged circumferentially along the single-layer hollow carbon fiber column 1 can induce circumferential flow around the airflow, achieving a multi-level Karman vortex street superposition effect. This significantly enhances the periodic lateral excitation force on both sides of the single-layer hollow carbon fiber column 1, greatly reducing the initiation threshold of airflow excitation and adapting to an ultra-low micro-wind initiation speed of 2.0 m / s. The parameter matching of 0.18 m fin height, 22.5 helix angle, and 4.5 m pitch allows the airflow to form a continuous and stable flow along the axial direction of the column 1. The design ensures consistent vortex shedding frequency by mitigating the instability of the vortex street caused by turbulent airflow at low wind speeds. The symmetrical streamlined cross-section design, with a rounded front and pointed rear, combined with a 12mm radius rounded arc at the leading edge, significantly reduces airflow drag, allowing the airflow to adhere smoothly to the sprue surface and effectively preventing premature airflow separation at low wind speeds, thus ensuring the effectiveness of vortex street induction. The 36mm thick cross-section, located at 30% of the chord length from the leading edge, balances the sprue's structural rigidity and resistance to wind load variations. While improving the shape capability, it optimizes the aerodynamic performance of the airflow around the spar, allowing the spar to stably induce vortex streets even during micro-vibration. The symmetrical sharp wedge-shaped tail at the 15-degree angle of the back air trailing edge can accurately fix the airflow separation point, avoiding fluctuations in the KAMAN vortex street shedding frequency caused by the displacement of the airflow separation position. This ensures that the vortex street shedding frequency is precisely matched with the natural frequency of the tuned mass damping system 14, providing a continuous and stable micro-amplitude lateral swaying excitation source for the single-layer hollow carbon fiber column 1, laying the core aerodynamic foundation for stable start-up and continuous power generation of the device in a light wind environment.

[0035] In this embodiment of the invention, the power conversion and power generation actuator 4 includes a movable seat 41 and a permanent magnet linear generator 42. The movable seat 41 moves up and down on a stationary rigid vertical frame 11. A round rod is fixed to the lower end of the movable seat 41. The permanent magnet linear generator 42 is mounted on the stationary rigid vertical frame 11, and the round rod at the lower end of the movable seat 41 is connected to the central straight shaft of the permanent magnet linear generator 42 via a coupling. The permanent magnet linear generator 42 is a 500kW-class generator that can directly convert the linear reciprocating motion of the movable seat 41 into electrical energy. Its function is to: receive the axial reciprocating tension transmitted by the central flexible suspension rope 113, and move up and down linearly synchronously with the reciprocating traction of the central flexible suspension rope 113. The lower fixed round rod is rigidly connected to the central straight shaft of the permanent magnet linear generator 42 via a coupling. It can transmit the mechanical energy of its own reciprocating motion to the permanent magnet linear generator 42 without loss or interruption. This eliminates the intermediate transmission links such as threaded engagement and gear transmission required by traditional rotary generators, greatly reducing the loss of vibration mechanical energy during transmission and maximizing the retention of effective energy. The 500kW-class permanent magnet linear generator 42 can directly and efficiently convert the axial reciprocating linear motion mechanical energy into electrical energy without the need for additional auxiliary components such as speed-increasing gearboxes and reversing transmission components. This simplifies the overall structure and greatly improves the energy conversion efficiency, ensuring that the device can stably output 500kW rated power at rated wind speed.

[0036] In Example 2, based on Example 1, the single-layer hollow carbon fiber column 1 has an outer diameter of 2.8m, a wall thickness of 30mm, and an axial height of 38m. It is integrally molded using high-strength carbon fiber composite material. Its function is as follows: The 2.8m outer diameter combined with the 38m axial height allows for sufficient airflow area to be achieved with the spiral louvers and multi-vortex airfoils on the outer wall, effectively capturing low-speed airflow and ensuring that the vortex-induced vibration generating mechanism 2 can stably induce the Karman vortex street, providing a continuous lateral excitation foundation for the device; The 30mm wall thickness combined with the integral molding process of high-strength carbon fiber composite material balances lightweight structure with high structural rigidity and high fatigue strength. It can both avoid excessive weight to suppress small-amplitude lateral vibration, ensuring that synchronous lateral sway can be generated smoothly under ultra-low wind speeds of 2.0m / s, and withstand long-term reciprocating vibration loads and structural stress under extreme high wind conditions, preventing deformation, cracking, or breakage during vibration.

[0037] Example 3, based on Examples 1 and 2, has a starting wind speed of 2.0 m / s, a rated wind speed of 3.5 m / s, a cut-out wind speed of 38 m / s, and a rated output power of 500 kW. It can be deployed in high-density staggered configurations in onshore, nearshore, and deep-sea environments. Its functions are: the ultra-low starting wind speed of 2.0 m / s combined with a rated wind speed of 3.5 m / s completely breaks through the traditional reliance on high wind speeds in wind power generation, adapting to the natural wind conditions of low wind speeds and frequent wind speed fluctuations in most areas throughout the year, significantly expanding the applicable wind field range of the device, effectively extending the effective power generation time throughout the year, and solving the industry pain points of conventional wind turbines being unable to start and having low power generation efficiency under low wind speeds, fully exploring the utilization value of low-wind-speed wind energy resources; the high cut-out wind speed design of 38 m / s balances structural safety and continuous power generation capacity under extreme wind conditions, ensuring power generation even when the wind speed does not reach the cut-out threshold. It can maintain stable operation and automatically cut off the power generation circuit when encountering sudden strong winds. With the help of the whole unit's damping and elastic support structure, it can achieve self-protection and avoid structural damage caused by strong wind loads. It is suitable for complex and ever-changing outdoor meteorological environments. The rated output power of 500kW is at the level of large and medium-sized wind power generation. It has achieved a breakthrough in high power in the category of low wind speed wind turbines. A single unit can meet the power supply needs of large-scale projects, improve the unit wind energy utilization efficiency, and reduce the unit power operation and maintenance and construction costs. It can be flexibly adapted to multiple scenarios such as onshore, near-shore and deep-sea, and supports high-density staggered arrangement. On the one hand, it breaks the limitations of scenario deployment and takes into account the installation conditions of different regions such as inland plains, coastal mudflats and offshore waters. On the other hand, the high-density staggered layout can maximize the use of site space, avoid airflow interference and vibration interference during the operation of adjacent units, and further improve the overall wind energy capture and power generation in the region.

[0038] The working principle of this invention: When airflow passes through a single-layer hollow carbon fiber column 1 with an outer diameter of 2.8m and an axial height of 38m, the 12 spiral louvered multi-vortex fins evenly arranged circumferentially on the outer wall of the single-layer hollow carbon fiber column 1, relying on its continuous spiral structure and streamlined cross-section with a round front and pointed rear, induce the surrounding airflow throughout the entire domain, precisely forming a stable and alternating karman vortex street. This strengthens the periodic lateral excitation force on both sides of the single-layer hollow carbon fiber column 1, driving the single-layer hollow carbon fiber column 1, which is integrally molded from high-strength carbon fiber composite material, to achieve the desired effect. The fiber column 1 generates a slight lateral sway synchronized with the detachment frequency of the Karman vortex street; the cover 13, rigidly connected to the lower end of the single-layer hollow carbon fiber column 1, sways laterally along with it. The circumferential elastic support component 15 set between the cover 13 and the mounting base 12 simultaneously provides elastic support and radial limitation for the bottom end of the cover 13 and the single-layer hollow carbon fiber column 1, providing flexible support for the slight lateral sway of the single-layer hollow carbon fiber column 1, reducing vibration initiation resistance, and further optimizing the vibration initiation response under ultra-low wind speeds of 2.0 m / s. The sensitivity, combined with the upper damping structure, further enhances the overall stability of the machine's operation. The vibration transmission mechanism 3, which is rigidly fixed to the inner wall of the single-layer hollow carbon fiber column 1, sways laterally along with it. While the vibration transmission mechanism 3 sways laterally, its bottom is simultaneously fixedly connected to the central flexible suspension rope 113 and transmits stable lateral vibration. The swaying part directly contacts the annular elastic ring 141 on the outer periphery of the tuned mass damping system 14, triggering the tuned mass damping system 14 to be subjected to force, and then performing pure axial up-and-down reciprocating vibration along the stationary outer rigid vertical frame 11. The circumferentially distributed helical spring assembly 112, which is fixed on the stationary outer rigid vertical frame 11 by the upper and lower triangular support connecting plates 111, undergoes elastic deformation with the axial movement of the tuned mass damping system 14. After deformation, it generates a reverse elastic restoring force and acts on the tuned mass damping system 14. Then, the annular elastic ring 141 smoothly bounces the vibration transmission mechanism 3 back in the opposite direction, thus forming a continuous and stable reciprocating vibration transmission. At the same time, the tuned mass damping system 14, with its own strength and rated wind speed 3, achieves this.The 5 m / s Karman vortex street shedding frequency is precisely matched with the natural frequency. Combined with the elastic reset effect of the circumferentially distributed helical spring assembly 112, the overall vibration frequency of the device is stably controlled, the effective vibration stroke is appropriately amplified, and excess vibration energy is dissipated simultaneously to avoid structural damage caused by excessive vibration amplitude. The upper and lower conical support frames 32 of the symmetrical conical truss structure inside the vibration transmission mechanism 3 evenly distribute the lateral swaying received by the annular reinforcing frame 31 to the central guide shaft 33. The elastic damping elements 332 of the circumferential array inside the annular disk 331 on the central guide shaft 33 further buffer the swaying and limit and correct the deviation, ensuring that the vibration is stably transmitted to the central flexible suspension rope 113. The central flexible suspension rope 113 efficiently converts the received lateral vibration into axial reciprocating tension, which drives the movable seat 4 of the traction power conversion and power generation actuator 4. The device performs directional vertical reciprocating motion along the stationary rigid vertical frame 11. The lower round rod of the movable seat 41 is directly connected to the central shaft of the 500kW permanent magnet linear generator 42 via a coupling, directly and losslessly converting the mechanical energy of the linear reciprocating motion into electrical energy, thus achieving efficient conversion from wind energy to vibration mechanical energy and then to electrical energy. The device's ultra-low start-up wind speed of 2.0m / s allows it to start in low wind conditions, while its high cut-out wind speed of 38m / s provides self-protection in extreme winds. The entire unit can be arranged in a high-density staggered configuration in onshore, nearshore, and deep-sea environments, stably achieving a rated power output of 500kW. The mounting base 12 at the bottom of the stationary rigid vertical frame 11 ensures the stability of the entire unit through a three-point anchoring assembly. Combined with the circumferential elastic support assembly 15 and the tuned mass damping system 14, this ensures stable, efficient, and safe operation of the entire unit throughout its operation.

[0039] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0040] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0041] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bladeless wind power generation device with multi-vortex surface for micro-wind operation, comprising: A single-layer hollow carbon fiber column (1), a vortex-induced vibration generating mechanism (2), a vibration transmission mechanism (3), and a power conversion and power generation actuator (4) are characterized in that: the single-layer hollow carbon fiber column (1) is made of carbon fiber composite material; a static outer rigid frame (11) is provided through the internal cavity of the single-layer hollow carbon fiber column (1) along its axial direction; the bottom end of the static outer rigid frame (11) is rigidly connected to a mounting base (12); the lower end of the single-layer hollow carbon fiber column (1) is rigidly connected to a cover (13); a circumferential elastic support assembly (15) is provided between the cover (13) and the mounting base (12); a central flexible suspension rope (113) is provided through the static outer rigid frame (11) along the central axis of the single-layer hollow carbon fiber column (1); and a tuned mass damping system (14) is provided on the static outer rigid frame (11). The vortex-induced vibration generating mechanism (2) is a spiral louvered multi-vortex wing strip fixed to the outer wall of a single-layer hollow carbon fiber column (1); The vibration transmission mechanism (3) includes two sets of annular reinforcing frames (31) arranged at intervals along the axial direction of the single-layer hollow carbon fiber column (1). The outer ring of the annular reinforcing frame (31) is rigidly fixed to the inner wall of the single-layer hollow carbon fiber column (1) and can generate transverse vibration synchronized with the shedding frequency of the Karman vortex street with the slight deformation of the single-layer hollow carbon fiber column (1). The power conversion and power generation actuator (4) is connected to the central flexible suspension rope (113), which can sequentially convert the lateral vibration of the ring reinforcement frame (31) into axial reciprocating linear motion and finally into electrical energy.

2. The micro-wind type multi-vortex bladeless wind power generation device according to claim 1, characterized in that, The stationary peripheral rigid frame (11) is provided with upper and lower triangular support connecting plates (111) and circumferentially distributed helical spring assemblies (112). The three apex corners of the upper and lower triangular support connecting plates (111) are rigidly fixed to the stationary peripheral rigid frame (11). The circumferentially distributed helical spring assemblies (112) are evenly arranged along the circumference of the stationary peripheral rigid frame (11). One end of each helical spring is rigidly fixed to the plate surface of the upper and lower triangular support connecting plates (111), and the other end is in contact with the tuned mass damping system (14) at the corresponding position.

3. A bladeless wind power generation device with multi-vortex surface for micro-wind operation according to claim 2, characterized in that, The tuned mass damping system (14) can reciprocate synchronously along the axial direction of the single-layer hollow carbon fiber column (1) as the circumferentially distributed helical spring assembly (112) deforms. The tuned mass damping system (14) is provided with an annular elastic ring (141) on its outer periphery. When the vibration transmission mechanism (3) moves laterally with the single-layer hollow carbon fiber column (1), it can come into contact with the annular elastic ring (141).

4. A bladeless wind power generation device with multi-vortex surface for micro-wind operation according to claim 3, characterized in that, The bottom of the vibration transmission mechanism (3) is fixedly connected to the central flexible suspension rope (113). The vibration transmission mechanism (3) also includes an upper and lower conical support frame (32). The upper and lower conical support frame (32) is a symmetrical conical truss structure. The large diameter end of the upper and lower conical support frame (32) is rigidly connected to the corresponding annular reinforcing frame (31). The small diameter end is fixed with a central guide shaft (33). An annular disk (331) is fixed on the central guide shaft (33). The annular disk (331) has guide holes arranged in a circumferential array. An elastic damping element (332) passes through the guide holes.

5. A bladeless wind power generation device with multi-vortex surface for micro-wind operation according to claim 1, characterized in that, Twelve spiral louvered multi-vortex fins are evenly arranged along the circumference of the single-layer hollow carbon fiber column (1), forming a continuous spiral structure without any breaks. The fin height of the spiral louvered multi-vortex fin is 0.18m, the spiral angle is 22.5°, and the pitch is 4.5m. The spiral louvered multi-vortex fin adopts a streamlined cross-section with a symmetrical front round and rear pointed shape. The front edge of the cross-section is a rounded arc with a radius of 12mm, and the maximum thickness is 36mm, located at 30% of the chord length from the front edge. The rear edge of the back edge is a symmetrical sharp wedge with an angle of 15°.

6. A bladeless wind power generation device with multi-vortex surface for micro-wind operation according to claim 1, characterized in that, The power conversion and power generation actuator (4) includes a movable seat (41) and a permanent magnet linear generator (42); the movable seat (41) moves up and down on the stationary peripheral rigid frame (11), and a round rod is fixed at the lower end of the movable seat (41). The permanent magnet linear generator (42) is installed on the stationary peripheral rigid frame (11), and the round rod at the lower end of the movable seat (41) is connected to the central straight shaft of the permanent magnet linear generator (42) through a coupling.

7. A bladeless wind power generation device with multi-vortex surface for micro-wind operation according to claim 6, characterized in that, The permanent magnet linear generator (42) is 500kW and can directly convert the linear reciprocating motion of the movable seat (41) into electrical energy.

8. A bladeless wind power generation device with multi-vortex surface for micro-wind operation according to claim 5, characterized in that, The single-layer hollow carbon fiber column (1) has an outer diameter of 2.8m, a wall thickness of 30mm, and an axial height of 38m. It is integrally formed using high-strength carbon fiber composite material.

9. A bladeless wind power generation device with multi-vortex surface for micro-wind operation according to claim 1, characterized in that, The mounting base (12) is provided with a three-point anchoring assembly.

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