A device for controlling wind-induced vibration of a transmission tower-line system

Abstract

The application provides a device for controlling wind-induced vibration of a power transmission tower-line system, and particularly relates to the field of power transmission tower vibration control. The device comprises a shell and an elastic rod, the shell comprises an upper plate surface and a plurality of fixed plates which are distributed at equal intervals in the circumferential direction at the bottom of the upper plate surface; a plurality of swing plates are connected between the adjacent fixed plates through rotating shafts; a through hole is arranged at the center position of the upper plate surface; the elastic rod penetrates through the through hole and is fixed with the upper plate surface through an adjusting bolt. When wind-induced vibration occurs in the power transmission tower-line system, the swing ball swings and hits the swing plate, thereby dissipating the vibration energy through the impact and protecting the safety of the overall structure. In the device, counterweight blocks with different weights can be selected to control the vibration control of different frequencies of the power transmission tower-line system, and the device is convenient to install, easy to maintain and simple to use.

Description

Technical Field

[0001] This invention relates to the field of transmission tower vibration control, specifically to a device for controlling wind-induced vibration of transmission tower-line systems. Background Technology

[0002] Transmission tower-line systems are wind-sensitive structures, with wind loads being their primary load. The greater the tower height and the longer the transmission line span, the greater the impact of wind loads. Ultra-high voltage (UHV) transmission towers are lightweight, highly flexible, and low-damping structures, making them prone to vibration fatigue damage and dynamic collapse under extreme conditions. Wind damage and wind-induced failures are frequent worldwide. With increasing tower height, span length, and the application of high-strength, lightweight materials, long-span transmission towers are becoming increasingly sensitive to wind-induced vibration. To reduce the vibration response of transmission towers, in addition to studying the vibration resistance and structural requirements of the load-bearing system itself, research into vibration control technology is also necessary. The application of structural vibration control theory in transmission tower-line systems started relatively late and is currently in its early stages of development, with passive control methods being the primary approach.

[0003] Because long-span transmission towers have a flexible linear system, previous vibration reduction measures mainly involved using control elements to reduce vibration or decreasing the span of split conductors and increasing line damping to control line vibration and reduce line fatigue. As tower height continues to increase, control measures have shifted from line vibration control to structural vibration control.

[0004] Long-span transmission tower-line systems require dampers that offer excellent control over vibration modes at different frequencies. Furthermore, the dampers must be easy to install, highly adaptable to various environments, durable, and inexpensive. After installation, they must not increase the wind-exposed area of ​​the transmission tower, affect its appearance, add excessive dead load, weaken its stiffness, or provide energy to the dampers. To address these requirements, this invention proposes a device for controlling wind-induced vibrations in transmission tower-line systems, which effectively meets these requirements and provides good control. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and address the problem that most dampers cannot meet the frequency control requirements of long-span transmission tower-line systems, leading to vibration fatigue damage and dynamic collapse under extreme conditions, this invention provides a device for controlling wind-induced vibration of transmission tower-line systems. The specific technical solution is as follows:

[0006] A device for controlling wind-induced vibration of a transmission tower-line system includes a housing and an elastic rod. The housing includes an upper plate and a plurality of fixed plates evenly distributed along the circumference at the bottom of the upper plate. A swing plate is connected between adjacent fixed plates by a rotating shaft. A through hole is provided at the center of the upper plate. The elastic rod passes through the through hole and is fixed to the upper plate by adjusting bolts.

[0007] Preferably, a pendulum ball is provided at the bottom of the elastic rod.

[0008] Preferably, the top of the swing plate is provided with a detachable counterweight.

[0009] Preferably, the rotating shaft extends laterally through the middle of the swing plate, and the two ends of the rotating shaft are rotatably connected to the adjacent fixed plates on the left and right sides of the swing plate, respectively.

[0010] Preferably, the fixing plate is divided into an upper region and a lower region. The upper region is made of a non-metallic material, and the lower region is made of a magnet. Adjacent lower regions are arranged with S poles and N poles arranged laterally and alternately.

[0011] Preferably, the swing plate is made of magnet, and adjacent swing plates are arranged with S poles and N poles vertically and alternately; the arrangement of the magnetic poles at the lower end of the swing plate is opposite to the arrangement of the magnetic poles in the lower area of ​​the adjacent fixed plate.

[0012] More preferably, the elastic rod is made of polyurethane material.

[0013] Furthermore, preferably, the pendulum ball is made of high-damping rubber.

[0014] More preferably, the upper plate surface and the upper area of ​​the fixing plate are made of nano-ceramic material.

[0015] The beneficial effects of this invention are:

[0016] 1. The pendulum ball of this device is made of high-damping rubber, which can effectively improve the energy dissipation capacity during the collision process.

[0017] 2. The fixed plate and swing plate of the device are made of magnets. By arranging adjacent magnetic poles in opposite and alternating ways, the magnetic field force is used to provide a restoring force for the swing plate, which solves the problem of fatigue damage of elastic elements caused by traditional elastic reset. Attached Figure Description

[0018] The accompanying drawings constituting this application are provided to further understand this application and do not constitute an undue limitation of this application.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a top view of the present invention;

[0021] Figure 3 This is a schematic diagram of the outer shell portion of the present invention;

[0022] Figure 4This is a bottom view of the outer shell portion in this invention;

[0023] Figure 5 This is a schematic diagram of the structure of the swing plate and counterweight in this invention;

[0024] Figure 6 This is a schematic diagram of the elastic rod and pendulum in this invention;

[0025] Figure 7 This is a schematic diagram of the magnetic field arrangement of the fixed plate and the swing plate in this invention;

[0026] In the diagram, 1-upper plate; 2-adjusting bolt; 3-through hole; 4-fixed plate; 41-upper area; 42-lower area; 5-swing plate; 6-counterweight; 7-rotating shaft; 8-elastic rod; 9-pendulum ball. Detailed Implementation

[0027] The specific implementation of the device for controlling wind-induced vibration of a transmission tower-line system provided by the present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0028] A device for controlling wind-induced vibration of a transmission tower-line system includes a housing and an elastic rod 8, with a pendulum ball 9 disposed at the bottom of the elastic rod 8. The housing includes an upper plate 1 and several fixed plates 4 evenly distributed along the circumferential direction at the bottom of the upper plate 1; the fixed plates 4 are divided into an upper region 41 and a lower region 42, wherein the upper region 41 is made of a non-metallic material; the lower region 42 is made of magnets, preferably, the S poles and N poles of the lower region 42 are arranged laterally and alternately, and the magnetic poles of adjacent lower regions 42 are arranged alternately.

[0029] Several swing plates 5 are arranged between adjacent fixed plates 4. A rotating shaft 7 is transversely inserted through the middle of each swing plate 5, and the two ends of the rotating shaft 7 are rotatably connected to the adjacent fixed plates 4 on the left and right sides of the swing plate 5, respectively. It is worth noting that the swing plates 5 are made of magnets, and the S poles and N poles of adjacent swing plates 5 are arranged vertically and alternately, so that the arrangement of the magnetic poles at the lower end of the swing plate 5 is opposite to the arrangement of the magnetic poles in the lower region 42 of the adjacent fixed plates 4. Preferably, in order to make the impact of the pendulum ball 9 fall on the swing plate 5 as much as possible, the width of the fixed plate 4 is smaller than the width of the swing plate 5.

[0030] A through hole 3 is also provided at the center of the upper plate 1; the elastic rod 8 passes through the through hole 3, and its upper end is fixed to the upper plate 1 by adjusting bolts 2. Preferably, the length and cross-sectional area of ​​the elastic rod 8 and the mass of the pendulum ball 9 can be selected according to the actual vibration frequency of the transmission tower.

[0031] Preferably, each of the swing plates 5 is provided with a detachable counterweight 6 at its top.

[0032] More preferably, the elastic rod 8 is made of polyurethane material; the pendulum ball 9 is made of high-damping rubber.

[0033] To meet the requirements of the device's hardness and vibration performance, the upper plate surface 1 and the upper region 41 of the fixing plate 4 are made of nano-ceramic material.

[0034] In use, the device is placed at the location of the transmission tower with the greatest vibration amplitude. When the transmission tower-line system vibrates under wind excitation, if the vibration is small, only the elastic rod 8 drives the vibrating pendulum 9 to swing slightly; if the vibration increases, the elastic rod 8 drives the vibrating pendulum 9 to swing with a larger amplitude. At this time, the pendulum 9 hits the surrounding swing plates 5, dissipating the energy generated by the vibration through the impact. At the same time, each swing plate 5 and the counterweight 6 together form a tuned mass vibration damping device. The magnetic field between the lower region 42 of the fixed plate 4 and the swing plate 5 provides a restoring force for the swing plate 5 based on the attraction force between opposite poles (this force is opposite to the swing direction of the swing plate 5). Meanwhile, the counterweight 6 in this device is detachably connected to the swing plate 5, and different weights of counterweight 6 can be selected to meet the vibration control requirements of different frequencies of the transmission tower-line system. This invention is easy to install, maintain, use, and produce at low cost. By arranging adjacent magnetic poles in opposite and alternating ways, it uses the magnetic field force to provide a reset force for the swing plate, which solves the problem of fatigue damage to elastic elements caused by traditional elastic reset. At the same time, it can also meet the vibration impact of various vibration frequencies on transmission towers, making it highly practical.

[0035] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are merely used to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any particular component or element in this invention, nor should they be construed as limiting the invention. Terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of the above terms in this invention based on the specific circumstances, and they should not be construed as limiting the invention.

[0036] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A device for controlling wind-induced vibration of a tower-line system, comprising a housing and an elastic rod, characterized in that, The shell comprises an upper plate surface and a plurality of fixed plates distributed equidistantly along the circumference at the bottom of the upper plate surface; adjacent fixed plates are connected by a rotating shaft with a swing plate; the center of the upper plate surface is provided with a through hole; the elastic rod penetrates the through hole and is fixed with the upper plate surface by an adjusting bolt; The bottom of the elastic rod is provided with a swing ball; The fixed plate is divided into an upper area and a lower area, the upper area is made of non-metallic material; the lower area is made of a magnet, adjacent lower areas are arranged in a transverse S-pole and N-pole and alternating arrangement manner; The swing plate is made of a magnet, adjacent swing plates are arranged in a vertical S-pole and N-pole and alternating arrangement manner; the arrangement manner of the lower end magnetic pole of the swing plate is opposite to the arrangement manner of the lower area magnetic pole of the adjacent fixed plate; The top of the swing plate is provided with a detachable counterweight; The rotating shaft penetrates the middle of the swing plate transversely, and the two ends of the rotating shaft are respectively rotatably connected with the left and right adjacent fixed plates of the swing plate.

2. The apparatus for controlling wind-induced vibrations of a tower-line system according to claim 1, wherein The elastic rod is made of polyurethane material.

3. The apparatus for controlling wind-induced vibrations of a transmission tower-line system according to claim 1, wherein The swing ball is made of high-damping rubber.

4. The apparatus for controlling wind-induced vibrations of a transmission tower-line system of claim 1, wherein, The upper plate surface and the upper area of the fixed plate are made of nano ceramic material.

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