Energy-capturing wind-induced vibration self-adaptive spoiler device for steel tube transmission tower

Abstract

The application discloses a kind of energy trapping steel pipe transmission tower wind vibration self-adaptive spoiler device, including two identical spoiler structures, which are connected by control rod between two.The spoiler structure includes fixed unit, spoiler unit and energy storage control component, the spoiler unit includes two unequal size guide vanes arranged on its outer ring and super magnetostrictive element arranged in its radial plane, and piezoelectric sheet is attached to the end of super magnetostrictive element;The fixed unit is spaced apart by magnet at both ends, and the super magnetostrictive element extrudes the piezoelectric sheet to generate electricity under the action of changing magnetic field, and the energy storage control component stores electrical energy and controls the rotation speed of the control rod.The device can be self-adapted according to different wind speed, freely rotate to adapt to complex and changeable multi-directional incoming flow, convert wind energy into electrical energy for capture and use, and has good application prospect.

Description

Technical Field

[0001] This invention belongs to the field of power technology, specifically relating to an energy-harvesting steel pipe transmission tower micro-wind vibration adaptive disturbance device, which is mainly used to suppress micro-wind vibration phenomena of steel pipe components of lattice towers such as transmission towers. Background Technology

[0002] Existing 1000kV ultra-high voltage transmission lines, due to their large spans and tall towers, find that traditional angle steel towers can no longer meet the structural strength requirements, so steel pipe towers are generally selected. Circular cross-section steel pipe members have good aerodynamic performance, with a wind pressure shape coefficient only about half that of angle steel members. Therefore, using steel pipes can effectively reduce the wind load on the tower body and improve the structural bearing capacity.

[0003] However, certain slender steel pipe members, especially those arranged horizontally, are prone to lateral vortex-induced vibrations at low wind speeds, often referred to as "micro-wind vibrations" in power engineering. This continuous and repetitive vibration can cause loosening of tower bolt connections, tensile failure of connecting bolts, and fatigue failure of connecting plates. Furthermore, due to the vibration coupling between the tower and the conductor / ground wire, the high-frequency vibrations of the steel pipe members at the suspension point can resonate with the higher-order vibrations of the conductor. To ensure the safe operation of ultra-high voltage transmission lines, it is necessary to implement suppression measures for the steel pipe tower members, a problem that designers urgently need to solve in practical engineering.

[0004] Currently, there are few measures to suppress the aerobatic vibration of steel pipe tower members, mainly three methods: first, increasing the stiffness of the members, such as pouring concrete inside the horizontal steel pipe; second, changing the cross-sectional shape of the members, such as arranging discontinuous short ribs along the direction of the member or wrapping damping ropes; and third, increasing the vibration damping of the members, such as installing vibration reduction devices on the steel pipe and installing damping materials at the joints. Most of these measures are passive controls. Although the structure is simple, they cannot automatically adjust in real time according to different operating conditions in the face of complex and variable wind fields, making it difficult to achieve the best suppression effect. Summary of the Invention

[0005] To address the aforementioned problem of ineffective suppression, this invention provides an energy-harvesting steel pipe transmission tower micro-wind vibration adaptive disturbance device, which aims to avoid micro-wind vibration of steel pipe tower members and ensure the safe operation of the steel pipe tower under long-term micro-wind conditions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An energy-harvesting steel pipe transmission tower micro-wind vibration adaptive turbulence device includes two identical turbulence structures, each comprising a fixed unit, a turbulence unit, and an energy storage control component. The two turbulence structures are connected by multiple control rods to form a whole. The turbulence unit includes two guide vanes of unequal size arranged on its outer ring and a super magnetostrictive element arranged in its radial plane, with a piezoelectric sheet closely attached to the end of the super magnetostrictive element. Magnets are spaced apart at both ends of the fixed unit. Under wind load, the turbulence unit drives the super magnetostrictive element to rotate. The super magnetostrictive element is subjected to the changing magnetic field of the fixed unit, causing it to deform and compress the piezoelectric sheet. The piezoelectric sheet generates electrical energy, which is stored by the energy storage control component. The energy storage control component controls the rotation speed of the control rods.

[0008] As a further technical solution, a certain gap is left between the turbulence unit and the fixed unit, so that the turbulence unit can rotate freely relative to the fixed unit, but cannot slip along the axial direction of the rod.

[0009] As a further technical solution, the fixing unit consists of two semi-circular clips, and the inner wall of the semi-circular clips in contact with the steel pipe tower members is coated with a viscoelastic material.

[0010] As a further technical solution, the middle part of each semi-circular clasp is a semi-tube structure, and the two ends of the semi-tube structure are respectively provided with semi-annular flanges. The two semi-annular flanges are parallel to each other, and a semi-annular space is formed between the semi-annular flanges.

[0011] As a further technical solution, magnets are spaced apart on the two semi-annular flanges.

[0012] As a further technical solution, the turbulence unit includes a dual-wing turntable, which consists of two semi-circular tiles connected by a connector. A long guide wing is protruding from the center of the outer ring of one of the semi-circular tiles, and a short guide wing is provided at the center of the outer ring of the other semi-circular tile.

[0013] As a further technical solution, the long and short guide vanes are of different sizes and masses, so that in the initial state the short guide vane and the long guide vane are located at the upper and lower ends of the double-wing turntable, respectively, and can return to their original positions after rotation.

[0014] As a further technical solution, the guide vane is a V-shaped plate, and two adjacent double-wing turntables are connected by multiple control rods.

[0015] As a further technical solution, a groove is provided on the radial surface of the dual-wing turntable, and the piezoelectric sheet and the super magnetostrictive component are tightly fitted and placed therein.

[0016] As a further technical solution, an elastic gasket is provided in the gap between the piezoelectric sheet and the inner wall of the groove of the double-wing turntable to provide preload and support.

[0017] As a further technical solution, the energy storage control component includes a controller, a battery, a driver, and a wind speed sensor. The current generated by the piezoelectric element is stored through the battery, which powers the controller, driver, and wind speed sensor. The controller adjusts the rotation speed of the control lever by adjusting the driver based on the value monitored by the wind speed sensor.

[0018] As a further technical solution, the driver is fixed on the inner side of the double-wing turntable, and the two ends of the control rod are inserted into the roller bearings of the driver and locked in place. The control rod rotates around its respective central axis. When rotating, the tangential velocity direction of the control rod at the point closest to the steel pipe tower member is opposite to the wind speed direction.

[0019] The beneficial effects of this invention are as follows:

[0020] The main functions of this invention are self-powered and adaptive turbulence, and it can adapt to winds from all directions. First, under the action of a light wind, a Karman vortex street will be formed on the leeward side of the steel pipe component. The long and short guide vanes interfere with the wind field and destroy the vortex. Second, due to the different wind-receiving areas of the long and short guide vanes, the magnitude of the force is different, which will generate a rotational torque around the steel pipe tower component, driving the double-wing turntable to rotate until the line connecting the long and short guide vanes is parallel to the wind direction. At this time, the control rod presents the optimal arrangement relative to the wind direction. Furthermore, the rotation of the dual-wing turntable subjectes the magnetostrictive component to a changing magnetic field, causing it to deform and compress the piezoelectric element, generating and collecting electrical energy. Simultaneously, the controller, based on values ​​monitored by the wind speed sensor, adjusts the rotation speed of the control rod by regulating the actuator, optimizing the device's ability to suppress aerodynamic vibrations. Therefore, this invention overcomes the passive control limitations of traditional suppression measures, achieving semi-active control of aerodynamic vibrations. It can adaptively adjust under different wind speeds, has a wide operating frequency band, and can rotate freely to adapt to complex and varied multi-directional airflow. The control rod maintains an optimal arrangement relative to the wind direction, resulting in significant suppression. Moreover, this invention is self-powered, requiring no external power supply. Combining the magnetostrictive component and piezoelectric element to capture wind energy, it boasts strong continuous operation capability and is energy-saving and environmentally friendly. This invention is lightweight, easy to install, and causes no damage to steel pipe components. It can effectively suppress aerodynamic vibrations of steel pipe components over a wide frequency band, offering significant economic and social benefits. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0022] Figure 1This is a schematic diagram of the overall installation in this embodiment;

[0023] Figure 2 This is an example. Figure 1 AA cross-section view;

[0024] Figure 3 This is a detailed structural diagram of the kava in this embodiment;

[0025] Figure 4 This is a detailed structural diagram of the dual-wing turntable in this embodiment;

[0026] Figure 5 This is a schematic diagram showing the position of the piezoelectric element in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the driver according to an embodiment of the present invention;

[0028] Figure 7 This is a circuit schematic diagram of the energy storage control component according to an embodiment of the present invention.

[0029] In the diagram: 1. Steel pipe tower member, 2. Double-wing turntable, 3. Clamp, 4. Magnet, 5. Short guide vane, 6. Long guide vane, 7. Bolt, 8. Connecting plate, 9. Piezoelectric sheet, 10. Driver, 11. Control rod, 12. Viscoelastic material, 13. Magnetostrictive component, 14. Rectifier, 15. Battery, 16. Wind speed sensor, 17. Controller, 18. Fuse, 19. Elastic gasket. Detailed Implementation

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, groups, and / or combinations thereof.

[0032] For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] As introduced in the background section, current inventions for suppressing micro-wind vibration of steel pipe towers are few and limited in function and form. To address these issues, this invention proposes an energy-harvesting adaptive turbulence device for micro-wind vibration of steel pipe transmission towers, comprising two identical turbulence structures, such as... Figure 1 As shown, each turbulence structure includes a fixed unit, a turbulence unit, and an energy storage control component; two turbulence structures are connected by multiple control rods to form a whole; the turbulence unit includes two guide vanes of different sizes on its outer ring and a giant magnetostrictive element in its radial plane, with piezoelectric sheets tightly attached to the ends of the giant magnetostrictive element; magnets are spaced apart at both ends of the fixed unit; under wind load, the turbulence unit drives the giant magnetostrictive element to rotate, and the giant magnetostrictive element is deformed by the changing magnetic field of the fixed unit, squeezing the piezoelectric sheet to generate electrical energy, which is stored by the energy storage control component, which controls the rotation speed of the control rods.

[0034] The specific structure of the present invention will now be described in detail with reference to the accompanying drawings:

[0035] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the energy-harvesting steel pipe transmission tower micro-wind vibration adaptive turbulence device proposed in this invention includes two identical turbulence structures. Each of the two turbulence structures includes a fixing unit, a turbulence unit, and an energy storage control component. The two turbulence structures are connected by multiple control rods 11 to form a whole.

[0036] Among them, such as Figure 3 As shown, the fixing unit in this embodiment consists of two semi-circular clips 3. Each semi-circular clip has a C-shaped cross-section and a semi-tube structure in the middle. The two ends of the semi-tube structure are respectively provided with semi-annular flanges. The two semi-annular flanges are parallel to each other, and a semi-annular space is formed between the semi-annular flanges. The inner wall of the clip 3 in contact with the steel pipe tower member 1 is coated with a viscoelastic material 12. The viscoelastic material 12 is based on epoxy resin and is used to fix the clip 3 to the outer wall of the steel pipe tower member 1 in an adhesive manner.

[0037] Furthermore, such as Figure 4 As shown, the turbulence unit includes a dual-wing turntable 2, which is composed of two semi-circular tiles. The two semi-circular tiles are connected at both ends by bolts 7 and fitted onto the outside of the clamping plate 3. A guide vane is provided at the center of the outer ring of each of the two semi-circular tiles. The centerlines of the two guide vanes are on the same straight line, and the two guide vanes are of different sizes. Figure 2 As shown, these are the short guide vane 5 and the long guide vane 6, respectively.

[0038] Furthermore, both the short guide vane 5 and the long guide vane 6 are V-shaped plates. The two adjacent double-wing turntables 2 are connected by four control rods 11. The four control rods 11 are arranged parallel to the axis of the steel pipe tower member 1, and their two ends extend into the driver 10 on the double-wing turntable, and can rotate under the control of the driver 10.

[0039] Specifically, there is a certain gap between the clapper 3 and the double-wing turntable 2, so that the double-wing turntable 2 can rotate freely relative to the clapper 3, but cannot slip along the axis of the rod.

[0040] Specifically, the long guide vane 6 and the short guide vane 5 are of different sizes and masses, so that in the initial state the short guide vane 5 and the long guide vane 6 are located at the upper and lower ends of the double-wing turntable 2, respectively, and can return to their original positions after rotation.

[0041] Specifically, the driver 10 is fixed to the inner side of the double-wing turntable 2, and the two ends of the control rod 11 extend into the roller bearings of the driver 10 and are locked in place.

[0042] Specifically, four control rods 11 are arranged around the circumference of the steel pipe tower member 1, and the line connecting two opposite control rods forms a 45° angle with the line connecting the long and short guide vanes.

[0043] Specifically, the control rods 11 rotate around their respective central axes. When rotating, the tangential velocity of the control rod at the point closest to the steel pipe tower member 1 is opposite to the direction of the wind speed.

[0044] Specifically, both the Kawa 3 and the double-wing turntable 2 are made of lightweight aluminum and manufactured using a one-piece molding process. The number of them can be determined according to actual needs.

[0045] Furthermore, the energy storage control component generates electricity by deforming the piezoelectric element 9 under the changing magnetic field of the magnet 4 through the super magnetostrictive element 13, which is then stored in the battery 15. The battery 15, wind speed sensor 16, controller 17, and fuse 18, together with the driver 10, form a closed loop to achieve semi-active control. The magnets 4 are spaced apart on the upper and lower flanges of the chuck 3; the inner surface of the double-wing turntable 2 has several grooves along the circumferential direction, in which the piezoelectric element 9 and the super magnetostrictive element 13 are tightly fitted; the gap between the piezoelectric element 9 and the inner wall of the groove of the double-wing turntable 2 is provided with an elastic gasket 19 to provide pre-tightening force and support; the piezoelectric element 9 and the rectifier 14 are connected in series to store electrical energy in the battery 15.

[0046] The construction sequence of this invention should be strictly followed during on-site construction. For example... Figure 1As shown, the present invention can be arranged at intervals on steel pipe members. The short guide vanes 5 and long guide vanes 6 of two adjacent double-wing turntables 2 are parallel to each other and initially vertical. The number of arrangement depends on actual needs. For steel pipe tower members that require micro-wind vibration control, firstly, a viscoelastic material 12 is applied to the outer wall of the steel pipe tower member 1 to fix the clamp 3; then, the double-wing turntable 2 is fitted onto the outside of the clamp 3 by connecting plate 8 and bolts 7, ensuring a certain gap between them; finally, four pre-selected control rods 11 are horizontally installed around the steel pipe tower member 1, with both ends extending into the roller bearings of the driver 10 and clamped.

[0047] The specific work process is as follows:

[0048] according to Figure 1 As shown, when this invention is installed on a steel pipe tower member requiring micro-wind vibration control, a Karman vortex street will form on the leeward side of the steel pipe tower member under micro-wind conditions. The short guide vane 5 and the long guide vane 6 interfere with the wind field and disrupt the vortex. Secondly, due to the different wind-receiving areas of the short guide vane 5 and the long guide vane 6, the magnitude of the force they experience will be different, generating a rotational torque around the axis of the steel pipe tower member. This will drive the double-wing turntable 2 to rotate until the line connecting the long and short guide vanes is parallel to the wind direction. At this point, the control rod 11 presents an optimal arrangement relative to the wind direction. In addition, the rotation of the double-wing turntable 2 causes the magnetostrictive component 13 to be subjected to a changing magnetic field, causing the magnetostrictive component to deform and compress the piezoelectric element 9, generating and collecting electrical energy. Simultaneously, the controller 17, based on the values ​​monitored by the wind speed sensor 16, adjusts the rotation speed of the control rod 11 by adjusting the driver 10, so that the micro-wind vibration suppression effect of this device reaches its optimal level.

[0049] This invention proposes an energy-harvesting steel pipe transmission tower micro-wind vibration adaptive disturbance device. It can adaptively adjust to different wind speeds, rotate freely to adapt to complex and variable multi-directional airflow, effectively capturing and utilizing wind energy with significant suppression effects, and requires no external power supply. Furthermore, this invention is lightweight, easy to install and replace, and has promising application prospects.

[0050] The above-described embodiments of this patent are not intended to limit the scope of protection of this invention. The implementation methods of this patent are not limited thereto. All other modifications, substitutions or alterations made to the above-described structure of this patent based on the above-described content of this patent and in accordance with ordinary technical knowledge and common practices in the field, without departing from the basic technical idea of ​​this patent, shall fall within the scope of protection of this patent.

Claims

1. A micro-wind vibration adaptive turbulence device for energy-harvesting steel pipe transmission towers, characterized in that, It includes two identical turbulence structures, each comprising a fixed unit, a turbulence unit, and an energy storage control component. Each turbulence structure is connected to the other by multiple control rods, forming a whole. The turbulence unit includes two guide vanes of unequal size on its outer ring and a giant magnetostrictive element disposed in its radial plane, with a piezoelectric sheet tightly attached to the end of the giant magnetostrictive element. Magnets are spaced apart at both ends of the fixed unit. Under wind load, the turbulence unit drives the giant magnetostrictive element to rotate. The giant magnetostrictive element is deformed by the changing magnetic field of the fixed unit, squeezing the piezoelectric sheet to generate electrical energy, which is stored by the energy storage control component. The energy storage control component controls the rotation speed of the control rods. The energy storage control component includes a controller, a battery, a driver, and a wind speed sensor. The current generated by the piezoelectric element is stored in the battery. The controller adjusts the rotation speed of the control lever by adjusting the driver based on the value monitored by the wind speed sensor. The control rods rotate around their respective central axes. When rotating, the tangential velocity of the control rod at the point closest to the steel pipe tower member is opposite to the direction of the wind speed.

2. The energy-harvesting steel pipe transmission tower micro-wind vibration adaptive turbulence device as described in claim 1, characterized in that, The fixing unit consists of two semi-circular clips, each with a semi-annular flange at both ends, and magnets are spaced apart on the flanges.

3. The energy-harvesting steel pipe transmission tower micro-wind vibration adaptive disturbance device as described in claim 1, characterized in that, The aforementioned turbulence unit includes a dual-wing turntable, which consists of two semi-circular tiles connected by a connector. A long guide wing protrudes from the center of the outer ring of one of the semi-circular tiles, and a short guide wing is provided at the center of the outer ring of the other semi-circular tile.

4. The energy-harvesting steel pipe transmission tower micro-wind vibration adaptive turbulence device as described in claim 3, characterized in that, The long and short guide vanes are of different sizes and masses, so that in the initial state the short guide vane and the long guide vane are located at the upper and lower ends of the double-wing turntable, respectively, and can return to their original positions after rotation.

5. The energy-harvesting steel pipe transmission tower micro-wind vibration adaptive turbulence device as described in claim 3, characterized in that, The guide vane is a V-shaped plate, and two adjacent double-wing turntables are connected by multiple control rods.

6. The energy-harvesting steel pipe transmission tower micro-wind vibration adaptive turbulence device as described in claim 3, characterized in that, The radial surface of the dual-wing turntable is provided with a groove, and the piezoelectric sheet and the super magnetostrictive component are tightly fitted and placed therein.

7. The energy-harvesting steel pipe transmission tower micro-wind vibration adaptive turbulence device as described in claim 6, characterized in that, An elastic gasket is provided in the gap between the piezoelectric sheet and the inner wall of the groove of the double-wing turntable to provide preload and support.

8. The energy-harvesting steel pipe transmission tower micro-wind vibration adaptive disturbance device as described in claim 1, characterized in that, The driver is fixed to the inner side of the double-wing turntable, and the two ends of the control rod are inserted into the roller bearings of the driver and locked in place.

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