A full-wind-direction bladeless wind-converging energy-harvesting device

Abstract

The application provides a full-wind-direction bladeless wind gathering and energy taking device, which comprises a full-wind-direction wind gathering and accelerating mechanism, a bladeless wind power taking mechanism arranged at a throat position of the full-wind-direction wind gathering and accelerating mechanism, and a power management module connected with the bladeless wind power taking mechanism. The application realizes the wind flow convergence and conditioning through the full-wind-direction wind gathering and accelerating mechanism, especially realizes the 360-degree full-wind-direction wind energy collection, improves the wind energy collection range, and based on the Venturi effect, improves the wind speed and wind energy density at the throat position, provides a high-density wind energy environment for the energy taking device to reduce the starting wind speed and improve the energy taking efficiency, and improves the output capacity under the same wind speed condition. The bladeless wind power taking mechanism converts the vibration energy into output electric energy, and the power management module manages, stores and outputs the electric energy, and solves the problems of high starting wind speed, insufficient wind direction adaptability, complex structure, high failure rate and the like of the existing sensor wind energy taking technology.

Description

Technical Field

[0001] This invention relates to the field of power sensing technology, and more specifically, to a bladeless wind-gathering energy harvesting device for all wind directions. Background Technology

[0002] The inter-regional power transmission channels used in major projects such as power transmission from desert and Gobi deserts and the West-to-East Power Transmission Project operate under complex and harsh conditions, making manual inspections difficult and maintenance costs high. Deploying sensors on transmission lines using IoT technology to monitor their operational status is an effective solution. However, stable sensor operation requires a reliable energy supply. Currently, most power supply methods for transmission line status monitoring sensors rely on batteries, current transformers (CTs), and photovoltaic panels. Batteries have limited capacity, requiring manual maintenance or replacement after depletion, which is difficult and costly, and their lifespan is limited in extreme outdoor environments such as high and low temperatures and rain and snow. CTs struggle to obtain power from DC lines, limiting their application in many DC transmission channels. While photovoltaic panels are widely used, their surfaces are prone to dust and snow accumulation in the windy and sandy environments of desert and Gobi deserts, affecting power generation efficiency and supply stability, thus restricting the reliability of power supply to overhead line sensors.

[0003] Wind energy, as the most common form of energy in desert and Gobi environments, can effectively solve the problem of reliable power supply for electrical sensors through its collection and utilization. However, in desert and Gobi environments, wind speed ranges are wide and wind direction changes frequently. Traditional unidirectional blade wind turbines have low uptime and insufficient power supply stability, making it difficult to guarantee a reliable power supply for line monitoring sensors. Summary of the Invention

[0004] In view of this, the present invention proposes a bladeless wind-gathering energy harvesting device for all wind directions, which aims to solve the problems of high start-up wind speed and insufficient wind direction adaptability of existing sensor wind-powered energy harvesting technology.

[0005] This invention proposes an all-directional bladeless wind-gathering energy harvesting device, comprising: an all-directional wind-gathering and accelerating mechanism for collecting wind energy in all directions and converging and conditioning the incoming wind based on the Venturi effect to accelerate the incoming wind and achieve maximum flow velocity at the throat position; a bladeless wind-power harvesting mechanism disposed at the throat position of the all-directional wind-gathering and accelerating mechanism for generating vibration under the excitation of high-speed airflow and converting vibration energy into output electrical energy; and a power management module connected to the bladeless wind-power harvesting mechanism for managing the electrical energy output by the bladeless wind-power harvesting mechanism.

[0006] Furthermore, in the aforementioned omnidirectional bladeless wind-gathering energy harvesting device, the omnidirectional wind-gathering and accelerating mechanism includes: an omnidirectional air intake and collection component and a converging and accelerating tubular flow channel; wherein, the omnidirectional air intake and collection component is provided with multiple guiding air intake channels, the air outlet of the omnidirectional air intake and collection component is located at the inlet of the converging and accelerating tubular flow channel, and the air outlet of each guiding air intake channel is connected to the inlet of the converging and accelerating tubular flow channel, for capturing and guiding incoming air from any direction at the inlet of the omnidirectional air intake and collection component, so as to guide incoming air from different directions to the inlet of the converging and accelerating tubular flow channel, and compress and perform negative pressure suction to achieve convergence and acceleration of wind energy at the throat position.

[0007] Furthermore, in the aforementioned all-directional bladeless wind-gathering and energy-harvesting device, the all-directional air intake and collection assembly includes: a wind guide cone; an outwardly expanding air guide port, which is fitted around the outer periphery of the wind guide cone at the small end of the wind guide cone, and the wind guide cone is provided with a plurality of spaced-apart guide vanes in the circumferential direction, and any two of the guide vanes form a guide air intake channel between the wind guide cone and the outwardly expanding air guide port.

[0008] Furthermore, in the aforementioned all-directional bladeless wind-gathering and energy-harvesting device, the outer edge of the outward-expanding air guide is rotated downward to increase the height of the air inlet between the outward-expanding air guide and the air guide cone.

[0009] Furthermore, in the aforementioned all-directional bladeless wind-gathering and energy-harvesting device, the bottom of the guide vanes extends along the inner wall of the outwardly expanding air guide and the converging and accelerating tubular flow channel into the interior of the converging and accelerating tubular flow channel.

[0010] Furthermore, in the aforementioned all-directional bladeless wind-gathering energy harvesting device, the converging and accelerating tubular flow channel includes: a converging compression pipe section, a throat section, and an expanding suction pipe section; wherein, the converging compression pipe section, the throat section, and the expanding suction pipe section are connected in sequence, and the incoming airflow is converged by the converging compression pipe section, and reaches its maximum flow velocity in the throat section based on the Venturi effect, so as to excite the bladeless wind power harvesting mechanism in the throat section. The expanding suction pipe section is used to generate a low-pressure zone at the outlet, which has a suction effect on the upstream airflow, attracting the fluid to move behind the expanding suction pipe section.

[0011] Furthermore, in the aforementioned all-directional bladeless wind-gathering energy harvesting device, the converging compression pipe section is a contraction pipe section with a gradually decreasing flow area; the expanding suction pipe section is a gradually expanding pipe section with a gradually increasing flow area.

[0012] Furthermore, in the aforementioned all-wind-direction bladeless wind-gathering energy harvesting device, the bladeless wind power harvesting mechanism includes: multiple wind-induced vibration energy harvesting devices arranged in multiple layers and / or arrays.

[0013] Furthermore, in the aforementioned all-directional bladeless wind-gathering energy harvesting device, the wind-induced vibration energy harvesting device includes: a horizontal fixed beam for suspending at the throat position of the all-directional wind-gathering acceleration mechanism; a piezoelectric component disposed on the free end of the horizontal fixed beam, and the piezoelectric component is provided with a blunt body for generating high-frequency mechanical vibration based on flutter / galloping effect to realize the conversion of aerodynamic force into mechanical energy, and drive the piezoelectric component to vibrate, so as to realize the conversion of mechanical energy into electrical energy through the piezoelectric component based on the piezoelectric effect.

[0014] Furthermore, in the aforementioned all-wind-direction bladeless wind-gathering energy harvesting device, the horizontal fixed beam is also provided with a limiting member on one side of the piezoelectric component to limit the vibration amplitude of the piezoelectric component.

[0015] Furthermore, in the aforementioned all-wind-direction bladeless wind-gathering energy harvesting device, there are two limiting members, which are respectively arranged on both sides of the piezoelectric component along the length direction of the horizontal fixed beam.

[0016] Furthermore, in the aforementioned all-directional bladeless wind-gathering energy harvesting device, the all-directional wind-gathering acceleration mechanism has a first side facing the incoming wind and a second side facing away from the incoming wind; the arrangement density of the wind-induced vibration energy harvesting device on the first side is greater than the arrangement density of the wind-induced vibration energy harvesting device on the second side.

[0017] Furthermore, in the aforementioned all-directional bladeless wind-gathering energy harvesting device, the power management module includes: a power tracking unit for processing the AC power output from the bladeless wind-power harvesting mechanism; a rectifier unit electrically connected to the power tracking unit for rectifying and converting the AC power processed by the power tracking unit to output DC power; an energy storage unit electrically connected to the rectifier unit for storing the DC power output by the rectifier unit; a discharge control unit electrically connected to the energy storage unit for controlling the discharge; and a DC / DC conversion unit electrically connected to the discharge control unit for converting and changing the voltage output by the discharge control unit.

[0018] The bladeless wind-gathering energy harvesting device provided by this invention achieves wind convergence and regulation through an all-directional wind-gathering acceleration mechanism, especially realizing 360° all-directional wind energy collection, thus increasing the wind energy collection range. Simultaneously, based on the Venturi effect, it converges and regulates the incoming wind to accelerate it and reach maximum velocity at the throat, thereby increasing the wind speed and wind energy density at the throat. This provides a high-density wind energy environment for the energy harvesting device to reduce the start-up wind speed and improve energy harvesting efficiency, as well as output capability under the same wind speed conditions. The bladeless wind-powered energy harvesting mechanism generates vibration under the excitation of the airflow at maximum velocity, converting the vibration energy into output electrical energy. The power management module stores and outputs the electrical energy, solving the problems of high start-up wind speed and insufficient wind direction adaptability in existing sensor-based wind energy harvesting technologies. Furthermore, this device also has the following advantages:

[0019] First, the all-directional air intake and collection component constructs an air intake channel through air guide cones, guide vanes, and outward-expanding air guides to achieve the convergence and regulation of incoming airflow. It also achieves all-directional wind energy capture through the design of multiple circumferential air intake channels, increasing the wind energy collection range.

[0020] Secondly, the converging and accelerating tubular flow channel achieves the convergence and acceleration of incoming airflow and negative pressure suction through the converging compression pipe section, throat section and expansion suction pipe section, which increases the wind speed and wind energy density at the throat section, and provides a high-density energy environment for the bladeless wind power energy harvesting mechanism to reduce the start-up wind speed and improve the energy harvesting efficiency.

[0021] Third, based on the advantage of the small size of the wind-induced vibration energy harvesting device, the energy output power is increased by arraying and multi-stage deployment at the throat section, thereby improving the reliability and stability of the power supply to the transmission line condition monitoring sensor. Furthermore, the bladeless wind power harvesting mechanism has a simple structure, good stability, and low cost. It also improves the utilization efficiency and output power of wind energy through multi-stage wind energy utilization, avoiding problems such as wind turbine damage, high failure rate, and insufficient output capacity in harsh environments. At the same time, the bladeless energy harvesting structure design avoids the problems of complex structure, high mechanical failure rate, and easy damage of traditional bladed energy harvesting devices. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0023] Figure 1 This is a cross-sectional view of the structure of the bladeless wind-gathering energy harvesting device for all wind directions provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the bladeless wind-gathering energy harvesting device for all wind directions provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the bladeless wind power harvesting mechanism provided in an embodiment of the present invention;

[0026] Figure 4 A top view of the bladeless wind power harvesting mechanism provided in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the wind-induced vibration energy harvesting device provided in an embodiment of the present invention;

[0028] Figure 6This is a schematic diagram of the structure of a piezoelectric component provided in an embodiment of the present invention;

[0029] Figure 7 This is a structural block diagram of a power management module provided in an embodiment of the present invention;

[0030] Figure 8 A top-view coordinate diagram of the throat segment provided by the present invention;

[0031] Figure 9 The wind speed data distribution diagram along the x-axis of the throat section provided by this invention;

[0032] Figure 10 The wind speed data distribution diagram along the y-axis of the throat section provided by this invention;

[0033] Figure 11 Comparison of the output effects of the bladeless wind power harvesting mechanism provided by the present invention;

[0034] Figure 12 The velocity diagram of the air inlet throat of a two-stage orthogonal guide vane in a full-circumferential wind concentrator disclosed in Chinese Publication No. CN120273848A;

[0035] Figure 13 The velocity diagram of the air inlet throat of the guide vane provided by the present invention;

[0036] Explanation of reference numerals in the attached figures:

[0037] 1-All-directional wind-gathering and accelerating mechanism, 11-All-directional air intake and collection assembly, 111-Guiding air intake channel, 112-Guiding cone, 113-Guiding blade, 114-Outwardly expanding air inlet, 12-Converging and accelerating tubular flow channel, 121-Converging compression pipe section, 122-Throat section, 123-Expanding suction pipe section, 13-Wind deflector, 2-Bladeless wind power harvesting mechanism, 21-Wind-induced vibration energy harvesting device, 211-Horizontal fixed beam, 212-Limiting component, 213-Piezoelectric component, 2131-Structural layer, 2132-Piezoelectric layer, 2133-Upper electrode layer, 2134-Lower electrode layer, 214-Blunt body, 3-Power management module, 31-Power tracking unit, 32-Rectifier unit, 33-Energy storage unit, 34-Discharge control unit, 35-DC / DC conversion unit, 4-Insulated wire. Detailed Implementation

[0038] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] See Figures 1 to 2 The figure illustrates a preferred structure of the all-directional bladeless wind-gathering energy harvesting device provided in an embodiment of the present invention. As shown in the figure, the device includes: an all-directional wind-gathering acceleration mechanism 1, a bladeless wind power harvesting mechanism 2, and a power management module 3.

[0040] The omnidirectional wind-gathering and acceleration mechanism 1 is used to collect wind energy in all directions and converge and regulate the incoming wind based on the Venturi effect, so as to accelerate the incoming wind and achieve the maximum flow velocity at the throat position. Specifically, the omnidirectional wind-gathering and acceleration mechanism 1 can collect wind energy in all directions and converge and regulate the incoming wind based on the Venturi effect, so as to achieve omnidirectional wind energy collection and wind-gathering and acceleration, so as to accelerate the incoming wind and achieve the maximum flow velocity at the throat position, thereby increasing the wind speed and wind energy density, and indirectly reducing the start-up wind speed of the wind-induced vibration energy harvesting device 21.

[0041] The bladeless wind power harvesting mechanism 2 is located at the throat of the all-directional wind-gathering and accelerating mechanism 1. It is used to generate vibration under the excitation of the airflow at maximum velocity and convert the vibration energy into electrical energy. Specifically, the bladeless wind power harvesting mechanism 2 is located inside the all-directional wind-gathering and accelerating mechanism 1, especially at the throat, where the incoming airflow reaches its maximum velocity. Under the excitation of the incoming airflow, it can generate high-frequency mechanical vibration based on the flutter effect, realizing the conversion of aerodynamic force into mechanical energy, and can convert mechanical energy into electrical energy to output alternating current.

[0042] The power management module 3 is connected to the bladeless wind power harvesting mechanism 2 and is used to manage the electrical energy converted and output by the bladeless wind power harvesting mechanism 2. Specifically, the power management module 3, as a power management module, can be set outside the all-wind-direction wind-gathering and accelerating mechanism 1, and can be electrically connected to the bladeless wind power harvesting mechanism 2 through an insulated wire 4. It receives the AC power output by the bladeless wind power harvesting mechanism 2, and performs input power tracking, rectification, and storage. It can also perform discharge control and voltage conversion to provide power.

[0043] See also Figures 1 to 2The omnidirectional wind-gathering and accelerating mechanism 1 includes: an omnidirectional air intake and collection component 11 and a converging and accelerating tubular flow channel 12; wherein, the omnidirectional air intake and collection component 11 is provided with multiple guiding air intake channels 111, the omnidirectional air intake and collection component 11 is located at the inlet of the converging and accelerating tubular flow channel 12, and the air outlet of each guiding air intake channel 111 is connected to the inlet of the converging and accelerating tubular flow channel 12, so as to capture and guide the incoming air from any direction at the inlet of the converging and accelerating tubular flow channel 12, so as to guide the incoming air from different directions to the inlet of the converging and accelerating tubular flow channel 12.

[0044] Specifically, the omnidirectional air intake collection assembly 11 can be disposed above the converging and accelerating tubular flow channel 12, and the omnidirectional air intake collection assembly 11 has multiple guiding air intake channels 111 in its circumference. These multiple guiding air intake channels 111 are arranged sequentially along the circumference of the omnidirectional air intake collection assembly 11 to capture and guide incoming airflow from any direction, and to guide the incoming airflow from any direction to the inlet of the converging and accelerating tubular flow channel 12 (e.g., Figure 1 Inside the top section (as shown), air is collected from all directions, and the incoming air is converged and conditioned by the converging and accelerating tubular flow channel 12 based on the Venturi effect, so that the incoming air is accelerated and reaches the maximum flow velocity at the throat position.

[0045] In this embodiment, to avoid airflow disturbance in the bottom space affecting the outflow of the converging and accelerating tubular flow channel 12, preferably, at the outlet of the converging and accelerating tubular flow channel 12 (e.g. Figure 1 The lower side shown is provided with a wind shield 13, which can be a cylindrical structure. Its inner diameter can be adapted to the inner diameter of the outlet of the converging and accelerating tubular flow channel 12. Furthermore, the outlet end, i.e. the bottom end, of the converging and accelerating tubular flow channel 12 can be closedly connected to the top end of the wind shield 13 to further avoid the influence of the external space.

[0046] See also Figure 1 and Figure 2 The omnidirectional air intake and collection assembly 11 includes: an air guide cone 112 and an outwardly expanding air guide port 114; wherein, the outwardly expanding air guide port 114 is located on the small-mouth end side of the air guide cone 112 (e.g., Figure 1 The lower side shown) is fitted with the outer periphery of the air guide cone 112, and the air guide cone 112 is provided with a number of spaced guide vanes 113 in the circumferential direction. Any two guide vanes 113 form a guide air inlet channel 111 between the air guide cone 112 and the outwardly expanding air guide port 114.

[0047] Specifically, the top of the air guide cone 112 can be a closed end, i.e., the top is closed to avoid airflow disturbance in the top space affecting the air intake efficiency; the outer wall of the air guide cone 112 has a streamlined structure, which guides the incoming airflow and reduces air intake blockage caused by airflow accumulation and pressure increase, which is beneficial to capturing the incoming airflow. In this embodiment, from the end away from the outward-expanding air guide 114 to the end closer to the outward-expanding air guide 114, i.e. from top to bottom, the outer diameter of the air guide cone 112 gradually decreases, especially with a smooth transition decrease, i.e., an arc-shaped decrease, so that the incoming airflow is gradually guided into the interior of the outward-expanding air guide 114, and from the interior of the outward-expanding air guide 114 into the converging and accelerating tubular flow channel 12. An outwardly expanding air guide port 114 is fitted around the lower part of the air guide cone 112, specifically at the small end. In this embodiment, the inner edge of the outwardly expanding air guide port 114 is adapted to and connected to the top edge of the converging and accelerating tubular flow channel 12, especially in a closed connection, forming an integrated structure. The outer edge of the outwardly expanding air guide port 114 is flipped downward to increase the height of the air inlet between the outwardly expanding air guide port 114 and the air guide cone 112. According to the formula for air intake volume per unit time, V=2vRh, the air intake volume introduced per unit time can be increased. The guide vanes 113 are arranged vertically and circumferentially along the outer arc surface of the air guide cone 112. The upper edge is connected to the outer arc surface of the air guide cone 112, especially in a completely closed connection, and the lower edge is connected to the upper arc surface of the outwardly expanding air guide port 114, especially in a completely closed connection, to prevent airflow leakage, so that the incoming airflow from the air guide cone 112 in a 360° circumference can be guided into the converging and accelerating tubular flow channel 12. The air inlet channel is composed of the air guide cone 112, the guide vanes 113, and the outward-expanding air guide port 114. The air inlet channel can capture, converge, and guide the incoming airflow. As a further optimization, there are no fewer than three guide vanes 113, and the multiple guide vanes 113 can be arranged unevenly in the circumferential direction according to the wind direction and wind speed differences in the application environment, so as to achieve more efficient wind energy capture and guidance. In particular, the arrangement density of the air guide cone 112 on the side facing the incoming airflow is greater than the arrangement density of the air guide cone 112 on the side facing away from the incoming airflow.

[0048] In this application, the bottom of the guide vane 113 extends into the interior of the converging and accelerating tubular flow channel 12 along the inner wall of the outwardly expanding air guide 114 and the converging and accelerating tubular flow channel 12. Specifically, the guide vane 113 adopts a single-stage structure, with its bottom extending into the interior of the converging and accelerating tubular flow channel 12, allowing the wind force to further extend towards the throat section under the guiding action of the guide vane 113. Conventional guide vanes with a horizontal bottom edge, due to the convergence of the incoming airflow at the bottom, cause subsequent incoming airflow to overflow under pressure. Therefore, this guide vane can prevent the overflow of incoming airflow, further increasing the wind speed and wind energy density in the throat section, such as... Figure 12 and Figure 13As shown, the maximum wind speed in the throat of the two-stage orthogonal guide vane model is 3.75 m / s, which is 44.2% higher than the incoming wind speed, but the area with the highest wind speed is relatively small. The average wind speed in the throat is 3.37 m / s, which is 29.6% higher than the incoming wind speed of 2.6 m / s. The guide vanes in this application extend the airflow and deliver more airflow deeper into the inlet of the converging and accelerating tubular flow channel, reducing the dissipation and overflow of airflow. This creates a large area of ​​high wind speed on the windward side of the throat. When the incoming airflow is 2.6 m / s at the inlet, the maximum wind speed in the throat increases to 3.9 m / s, with a maximum speed increase ratio of 50%, and the high-speed wind area accounts for a larger proportion. The average wind speed in the throat reaches 3.67 m / s, which is 41.2% higher than the incoming wind speed.

[0049] See also Figure 1 and Figure 2 The converging and accelerating tubular flow channel 12 includes a converging compression section 121, a throat section 122, and an expanding suction section 123. These three sections are sequentially connected. After the incoming airflow is converged by the converging compression section 121, it reaches its maximum velocity in the throat section 122 due to the Venturi effect, thus stimulating the bladeless wind power harvesting mechanism 2 within the throat section 122. The expanding suction section 123 creates a low-pressure zone at the outlet, drawing upstream air and attracting fluid to move behind it. Specifically, the converging compression section 121 converges and accelerates the incoming airflow, forming a high-density wind energy convergence zone at the outlet, and reaches its maximum velocity in the throat section 122. The expansion suction pipe section 123 can generate a low-pressure zone at the rear end of the outlet structure, creating a strong suction effect on the upstream air. This attracts more fluid to accelerate towards the rear of the expansion outlet, thereby significantly improving the quality of the fluid passing through the outlet structure. In particular, the convergence and acceleration of the airflow through the converging compression pipe section 121 and the negative pressure suction effect of the expansion suction pipe section 123 achieve the convergence and acceleration of wind energy at the throat section 122, thereby indirectly reducing the starting wind speed of the bladeless wind power harvesting mechanism 2 and improving the output capacity under the same wind speed conditions. The throat section 122, as the throat position, can be a straight section to facilitate the installation and fixation of the bladeless wind power harvesting mechanism 2.

[0050] In this embodiment, the converging compression pipe section 121 is a contraction pipe section, and its flow area gradually decreases. That is to say, along the airflow direction, i.e. from top to bottom, the flow area of ​​the converging compression pipe section 121 gradually decreases, forming a contraction section, which allows low-speed wind to gradually accumulate. At the inlet front of the contraction structure, due to the obstruction of the wall, part of the kinetic energy of the free fluid is converted into pressure energy, the fluid velocity decreases, and positive pressure is generated, which pushes the fluid to move towards the outlet surface of the contraction structure. With the increase of wind speed, the low-speed incoming wind can be converged and accelerated through the contraction structure, forming a high-density wind energy convergence zone at the outlet, and reaching the maximum flow velocity at the throat section 122.

[0051] In this embodiment, the expansion suction pipe section 123 is an expansion pipe section with a gradually increasing flow area. That is, along the airflow direction from top to bottom, the flow area of ​​the expansion suction pipe section 123 gradually decreases, forming an expansion section. As the airflow diffuses from the inlet to the outlet along the expansion structure wall, a low-pressure area is generated at the rear end of the expansion outlet structure, which forms a strong suction effect on the upstream air, attracting more fluid to move faster towards the rear of the expansion outlet, thereby significantly improving the quality of the fluid passing through the outlet structure.

[0052] In this embodiment, the lower part of the outwardly expanding air duct 114 is closedly connected to the upper part of the converging compression pipe section 121, the lower part of the converging compression pipe section 121 is closedly connected to the upper part of the throat section 122, the lower part of the throat section 122 is closedly connected to the upper part of the expanding suction pipe section 123, and the lower part of the expanding suction pipe section 123 is closedly connected to the wind deflector 13.

[0053] See Figure 3 This is a schematic diagram of the bladeless wind power harvesting mechanism 2 provided in an embodiment of the present invention. As shown in the figure, the bladeless wind power harvesting mechanism 2 includes multiple wind-induced vibration energy harvesting devices 21 arranged in multiple layers and / or in a row. Specifically, the bladeless wind power harvesting mechanism 2 can be a bladeless wind power harvesting mechanism, which may include multiple wind-induced vibration energy harvesting devices 21. To improve the utilization rate of wind energy within the throat of the all-wind-direction wind-gathering and accelerating mechanism 1, preferably, multiple wind-induced vibration energy harvesting devices 21 can be arranged within the same cross-section of the throat section 122 of the all-wind-direction wind-gathering and accelerating mechanism 1, such as... Figure 4 As shown, multiple wind-induced vibration energy harvesting devices 21 can be arranged at circumferential intervals along the throat section 122, especially in a scattering arrangement, and can also be arranged in the longitudinal space of the throat section 122, i.e., along the axial direction of the throat section 122 (e.g. Figure 3 Multiple layers are arranged in the vertical direction (as shown) to realize the tiered utilization of wind energy.

[0054] See also Figure 3 and Figure 5 The wind-induced vibration energy harvesting device 21 includes: a horizontal fixed beam 211, a piezoelectric component 213, and a blunt body 214; wherein, the horizontal fixed beam 211 is used to suspend the wind-gathering acceleration mechanism 1 at the throat position; the piezoelectric component 213 is disposed on the free end of the horizontal fixed beam 211, and the piezoelectric component 213 is provided with a blunt body 214, which is used to generate high-frequency mechanical vibration based on the flutter effect to realize the conversion of aerodynamic force into mechanical energy, and drive the piezoelectric component 213 to vibrate, so as to realize the conversion of mechanical energy into electrical energy through the piezoelectric component 213 based on the piezoelectric effect.

[0055] Specifically, the fixed end of the horizontal fixed beam 211 (such as...) Figure 5The left end (shown) can be fixedly installed on the inner wall of the throat section 122, especially with a rigid connection, to ensure that the wind-induced vibration energy harvesting device 21 is not damaged in harsh outdoor high-wind-speed environments. The free end of the horizontal fixed beam 211 can extend towards the center of the throat section 122. The piezoelectric component 213 and the blunt body 214 are disposed on the free end of the horizontal fixed beam 211. In particular, the piezoelectric component 213 is a plate-shaped or strip-shaped structure, which is vertically arranged on the free end of the horizontal fixed beam 211. Its bottom end is fixedly connected to the free end of the horizontal fixed beam 211, which can be rigidly connected, and its top end is connected to the blunt body 214. The blunt body 214 is excited by wind energy within the throat section 122 to generate vibration, which in turn drives the piezoelectric component 213 to vibrate, outputting alternating current based on the piezoelectric effect. To prevent the piezoelectric component 213 from breaking due to excessive amplitude of the blunt body 214 under high wind speeds, a limiting member 212 is provided on one side of the piezoelectric component 213 on the horizontal fixed beam 211 to limit the vibration amplitude of the piezoelectric component 213. Two limiting members 212 can be provided, respectively on both sides of the piezoelectric component 213. The bottom ends of the limiting members 212 can be fixedly connected to the free end of the horizontal fixed beam 211. By limiting the amplitude of the blunt body 214 and the piezoelectric component 213 through the limiting members 212, the reliability of the device under extreme wind speeds is improved. In this embodiment, there can be two limiting members 212, along the length direction of the horizontal fixed beam 211 (e.g., ...). Figure 5 (as shown in the horizontal direction) are respectively arranged on both sides of the piezoelectric component 213 (e.g. Figure 5 (As shown on the left and right sides).

[0056] See Figure 6 This is a schematic diagram of the structure of the piezoelectric component 213 provided in an embodiment of the present invention. As shown in the figure, the piezoelectric component 213 includes: a structural layer 2131 and a piezoelectric layer 2132 disposed on the structural layer 2131; wherein, an upper electrode layer 2133 and a lower electrode layer 2134 are respectively disposed on both sides of the piezoelectric layer 2132. Specifically, the structural layer 2131 has a certain stiffness and deformation recovery capability. The piezoelectric layer 2132 is disposed on the upper surface and / or the lower surface of the structural layer 2131, and the piezoelectric layer 2132 can be adhered to the structural layer 2131. Both the upper surface and the lower surface of the piezoelectric layer 2132 are coated with a metal film as electrode layers, namely the upper electrode layer 2133 and the lower electrode layer 2134, respectively. The piezoelectric layer 2132 can be a piezoelectric material.

[0057] See Figure 7This is a structural block diagram of the power management module 3 provided in an embodiment of the present invention. As shown in the figure, the power management module 3 includes: a power tracking unit 31, a rectifier unit 32, an energy storage unit 33, a discharge control unit 34, and a DC / DC conversion unit 35; wherein, the power tracking unit 31 is used to process the AC power output from the bladeless wind power harvesting mechanism 2; the rectifier unit 32 is electrically connected to the power tracking unit 31 and is used to rectify and convert the AC power processed by the power tracking unit 31 to output DC power; the energy storage unit 33 is electrically connected to the rectifier unit 32 and is used to store the DC power output by the rectifier unit 32; the discharge control unit 34 is electrically connected to the energy storage unit 33 and is used to control the discharge; the DC / DC conversion unit 35 is electrically connected to the discharge control unit 34 and is used to convert and change the voltage output by the discharge control unit 34.

[0058] Specifically, the power tracking unit 31 is connected to the rectifier unit 32, the rectifier unit 32 is connected to the energy storage unit 33, the energy storage unit 33 is connected to the discharge control unit 34, and the discharge control unit 34 is connected to the DC / DC conversion unit 35. The power tracking unit 31 is used to process the AC output of the bladeless wind power harvesting mechanism 2. The AC power is rectified and converted by the rectifier unit 32 and then input to the energy storage unit 33 in DC form. The discharge control unit 34 is used to control the discharge, and the DC-DC conversion unit changes the voltage output by the discharge control unit 34.

[0059] In this embodiment, according to Figure 8 , Figure 9 , Figure 10 The data shows that after wind energy convergence and acceleration, a jet of airflow is formed within the throat section 122. A high-speed area is formed at point C opposite to the incoming flow direction, while the lowest wind speed is at point A near the wall in the incoming flow direction. Taking an incoming wind speed of 2.5m as an example, after wind convergence and acceleration, the highest wind speed area in the x-axis direction within the throat section 122 reaches 3.5m / s, with a wind convergence and acceleration effect of 40%. Taking an incoming wind speed of 2.5m as an example, after wind convergence and acceleration, the wind speed distribution along the y-axis is relatively uniform, with a good wind convergence effect, all reaching above 3.25m / s. The highest wind speed values ​​are found at the midpoints of OB and OD, both reaching 3.6m / s.

[0060] To utilize wind energy more efficiently, considering that the wind speed distribution within the throat section 122 is not uniform, the wind-induced vibration energy harvesting device 21 is arranged in a non-uniform manner within the throat section 122. In particular, the throat position of the all-wind-direction wind-gathering acceleration mechanism 1 has a first side facing the incoming wind, namely the BCD region, and a second side facing away from the incoming wind, namely the ABD region. The arrangement density of the wind-induced vibration energy harvesting device 21 on the first side is greater than that on the second side. That is to say, the blunt bodies 214 of the wind-induced vibration energy harvesting device 21 are more densely deployed in the BCD region, while they are sparsely arranged in the ABD region, thereby achieving efficient wind energy harvesting and utilization.

[0061] In this embodiment, the omnidirectional wind-gathering and accelerating mechanism 2 is connected to a rotary drive mechanism (not shown in the figure), and a wind force detection mechanism (not shown in the figure) is provided on the outside of the omnidirectional wind-gathering and accelerating mechanism 2 to obtain the direction of the incoming external wind. The wind force detection mechanism is connected to a control mechanism, which is connected to the rotary drive mechanism, and is used to control the rotary drive mechanism based on the direction of the incoming external wind to drive the omnidirectional wind-gathering and accelerating mechanism 2 to rotate, so that the first side of the omnidirectional wind-gathering and accelerating mechanism 2 faces the incoming wind. Specifically, this device, especially the omnidirectional wind-gathering and accelerating mechanism 2, can be mounted on a fixed bracket, and the device is rotatably connected to the fixed bracket. In particular, the omnidirectional wind-gathering and accelerating mechanism 2 is rotatably mounted on the fixed bracket, and the omnidirectional wind-gathering and accelerating mechanism 2 can be connected to a rotary drive mechanism to drive the omnidirectional wind-gathering and accelerating mechanism 2 to rotate. In this embodiment, a wind force detection mechanism is provided on the outside of the omnidirectional wind-gathering and accelerating mechanism 2 to obtain the direction of the incoming external wind, or the density of the incoming wind in each direction. The wind detection mechanism is connected to a control mechanism, which is connected to the rotary drive mechanism. The control mechanism is used to control the rotary drive mechanism based on the direction of the incoming wind to drive the all-direction wind-gathering and accelerating mechanism 2 to rotate, so that the first side of the all-direction wind-gathering and accelerating mechanism 2 faces the incoming wind, that is, the first side of the all-direction wind-gathering and accelerating mechanism 2 faces the incoming wind with a higher density.

[0062] The working principle of this omnidirectional bladeless wind-gathering energy harvesting device is as follows: Incoming air enters the air inlet channel of the omnidirectional wind-gathering acceleration structure unit; after being conditioned by the guide cone 112 and the outwardly expanding guide port 114, the incoming air converges downwards into the contraction pipe section; the converging compression pipe section 121, i.e., the contraction pipe section, converges and compresses the incoming wind energy, increasing the wind speed and improving the wind energy power density; at the throat section 122, the incoming air excites the bladeless wind-power harvesting mechanism 2, i.e., the bladeless wind-power harvesting mechanism, from top to bottom; the blunt body 214 of the wind-induced vibration energy harvesting device 21 is based on... The vibration / flutter effect generates high-frequency mechanical vibration, realizing the conversion of aerodynamic force into mechanical energy; the blunt body 214 drives the piezoelectric component 213 to vibrate, and the piezoelectric material inside the piezoelectric component 213 realizes the conversion of mechanical energy into electrical energy based on the piezoelectric effect; the vibration amplitude of the piezoelectric component 213 is limited by the limiting component 212 to avoid damage to the piezoelectric material caused by excessive vibration amplitude; the bladeless wind power harvesting mechanism outputs AC power; the power management module 3 tracks, rectifies, stores, controls discharge, and converts the input power and voltage to realize external output.

[0063] In this embodiment, as Figure 8 As shown, by comparing the output capabilities of the bladeless wind power harvesting mechanism 2 combined with the all-directional wind-gathering acceleration mechanism 1, the beneficial effects of this all-directional bladeless wind-gathering energy harvesting device are demonstrated. The output performance of the bladeless wind power harvesting mechanism 2, after being equipped with the all-directional bladeless wind-gathering energy harvesting device, is superior to that without the device in the range of 2.5~15 m / s, with an average output power increase of approximately 15%. Specifically, the starting wind speed with the all-directional bladeless wind-gathering energy harvesting device is 4.5 m / s, a significant improvement compared to 5.5 m / s before loading. Furthermore, when the incoming wind speed is 5 m / s, the output voltage is 0.06V without the device, increasing to 0.76V with the device; when the incoming wind speed is 12 m / s, the output voltage increases from 2.61V to 2.86V.

[0064] In summary, the bladeless wind-gathering energy harvesting device provided in this embodiment achieves wind convergence and conditioning through the omnidirectional wind-gathering acceleration mechanism 1, especially realizing 360° omnidirectional wind energy collection, thus increasing the wind energy collection range. Simultaneously, based on the Venturi effect, it converges and conditions the incoming wind to accelerate it and reach maximum velocity at the throat, thereby increasing the wind speed and wind energy density at the throat. This provides a high-density wind energy environment for the energy harvesting device to reduce the start-up wind speed and improve energy harvesting efficiency, as well as output capability under the same wind speed conditions. The bladeless wind-powered energy harvesting mechanism 2 generates vibration under the excitation of the airflow at maximum velocity, converting the vibration energy into output electrical energy. The power management module 3 stores and outputs the electrical energy, solving the problems of high start-up wind speed and insufficient wind direction adaptability in existing sensor-based wind energy harvesting technologies. Furthermore, this device also has the following advantages:

[0065] First, the all-directional air intake and collection component 11 constructs an air intake channel through the air guide cone 112, the guide vane 113 and the outwardly expanding air guide 114 to realize the convergence, regulation and redirection of the incoming airflow, and achieves all-directional wind energy capture through the design of multiple circumferential air intake channels, thereby increasing the wind energy collection range.

[0066] Second, the converging and accelerating tubular flow channel 12 achieves the convergence and acceleration of the incoming airflow and negative pressure suction through the converging and compression pipe section 121, the throat section 122 and the expansion and suction pipe section 123, which increases the wind speed and wind energy density at the throat section 122, and provides a high-density energy environment for the bladeless wind power energy harvesting mechanism 2 to reduce the starting wind speed and improve the energy harvesting efficiency.

[0067] Third, based on the small size advantage of the wind-induced vibration energy harvesting device 21, the energy output power is increased by arraying and multi-stage deployment at the throat section 122, thereby improving the reliability and stability of the power supply to the transmission line status monitoring sensor. Furthermore, the bladeless wind power harvesting mechanism 2 has a simple structure, good stability, and low cost through its bladeless design. It also improves the utilization efficiency and output power of wind energy through multi-stage wind energy utilization, avoiding problems such as wind turbine damage, high failure rate, and insufficient output capacity in harsh environments. At the same time, the bladeless energy harvesting structure design avoids the problems of complex structure, high mechanical failure rate, and easy damage of traditional bladed energy harvesting devices.

[0068] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0069] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A bladeless wind-gathering and energy-harvesting device for all wind directions, characterized in that, include: The all-directional wind-gathering and accelerating mechanism is used to collect wind from all directions and converge and regulate the incoming airflow so that the incoming airflow is accelerated and reaches the maximum flow velocity at the throat position. A bladeless wind power harvesting mechanism is located at the throat of the all-wind-direction wind-gathering and accelerating mechanism. It is used to generate vibration under the excitation of high-speed airflow and convert the vibration energy into AC power output. A power management module, which is connected to the bladeless wind power harvesting mechanism, is used to manage the AC power output by the bladeless wind power harvesting mechanism. The omnidirectional wind-gathering and accelerating mechanism includes: an omnidirectional air intake and collection component and a converging and accelerating tubular flow channel; wherein... The omnidirectional air intake and collection component is provided with multiple air intake channels. The air outlet of the omnidirectional air intake and collection component is located at the inlet of the converging and accelerating tubular flow channel. Furthermore, the air outlet of each air intake channel is connected to the inlet of the converging and accelerating tubular flow channel. This is used to capture and guide incoming air from any direction at the inlet of the omnidirectional air intake and collection component, so as to guide incoming air from different directions to the inlet of the converging and accelerating tubular flow channel, and to achieve convergence and acceleration of wind energy at the throat position by contracting and negative pressure suction. The omnidirectional air intake and collection assembly includes: Air guide cone; An outwardly expanding air guide is provided with the outer periphery of the air guide cone sleeved on the small end side of the air guide cone. Furthermore, the air guide cone is provided with a number of spaced-apart guide vanes in the circumferential direction, and any two of the guide vanes form a guide air inlet channel between the air guide cone and the outwardly expanding air guide. The outer edge of the outward-expanding air guide is turned downward to increase the height of the air inlet between the outward-expanding air guide and the air guide cone. The bladeless wind power harvesting mechanism includes: multiple wind-induced vibration energy harvesting devices arranged in multiple layers and / or arrays; The wind-induced vibration energy harvesting device includes: A horizontal fixed beam is used to suspend the wind-gathering and accelerating mechanism at its throat position. A piezoelectric component is disposed on the free end of the horizontal fixed beam, and the piezoelectric component is provided with a blunt body for generating high-frequency mechanical vibration based on the flutter effect, realizing the conversion of aerodynamic force into mechanical energy, and driving the piezoelectric component to vibrate, so as to realize the conversion of mechanical energy into electrical energy through the piezoelectric component based on the piezoelectric effect.

2. The bladeless wind-gathering and energy-harvesting device for all wind directions according to claim 1, characterized in that, The bottom of the guide vane extends along the inner wall of the outward-expanding air inlet and the converging and accelerating tubular flow channel into the interior of the converging and accelerating tubular flow channel.

3. The bladeless wind-gathering and energy-harvesting device for all wind directions according to claim 1, characterized in that, The converging and accelerating tubular flow channel includes: a converging compression section, a throat section, and an expanding suction section; wherein... The converging compression pipe section, the throat section, and the expanding suction pipe section are connected in sequence. After the incoming airflow is converged by the converging compression pipe section, it reaches the maximum flow velocity in the throat section based on the Venturi effect, so as to excite the bladeless wind power harvesting mechanism in the throat section. The expanding suction pipe section is used to generate a low-pressure zone at the outlet, which generates a suction effect on the upstream airflow and attracts the fluid to move behind the expanding suction pipe section.

4. The bladeless wind-gathering and energy-harvesting device for all wind directions according to claim 3, characterized in that, The converging compression pipe section is a contraction pipe section, and its flow area gradually decreases; The expansion suction pipe section is a gradually expanding pipe section, and its flow area gradually increases.

5. The bladeless wind-gathering and energy-harvesting device for all wind directions according to claim 1, characterized in that, The horizontal fixed beam is also provided with a limiting member on one side of the piezoelectric component to limit the vibration amplitude of the piezoelectric component.

6. The bladeless wind-gathering and energy-harvesting device for all wind directions according to claim 5, characterized in that, There are two limiting members, which are respectively arranged on both sides of the piezoelectric assembly along the length direction of the horizontal fixed beam.

7. The bladeless wind-gathering and energy-harvesting device for all wind directions according to claim 1, characterized in that, The position of the all-directional wind-gathering and accelerating mechanism has a first side facing the incoming wind and a second side facing away from the incoming wind; The density of the wind-induced vibration energy harvesting device on the first side is greater than the density of the wind-induced vibration energy harvesting device on the second side.

8. The bladeless wind-gathering and energy-harvesting device for all wind directions according to any one of claims 1 to 4, characterized in that, The power management module includes: A power point tracking unit is used to process the AC power output from the bladeless wind power harvesting mechanism. A rectifier unit, which is electrically connected to the power tracking unit, is used to rectify and convert the AC power processed by the power tracking unit to output DC power. An energy storage unit, which is electrically connected to the rectifier unit, is used to store the DC power output by the rectifier unit; A discharge control unit, electrically connected to the energy storage unit, is used to control the discharge; The DC / DC conversion unit is electrically connected to the discharge control unit and is used to convert and change the voltage output by the discharge control unit.

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