Power transmission line wind vibration suppression self-adaptive damping device

Abstract

The invention relates to the technical field of power transmission lines, and discloses a power transmission line wind vibration suppression self-adaptive damping device which comprises a frame and a plurality of sets of connecting frames hinged to the frame, and each connecting frame comprises a connecting piece hinged to the frame and an openable annular piece installed on the connecting piece. Three rotatable rubber wheels are installed in the annular piece, the cable is fastened through contact between the three rubber wheels and the cable, and the three rubber wheels rotate along with rotation of the cable. According to the invention, the angle is adaptively adjusted along with the wind vibration motion of the cable, and the vibration energy of the cable under the wind action can be effectively buffered by matching with the three rubber wheels to stably clamp the cable. When the cable generates transverse or longitudinal vibration due to wind, the flexible rotation of the connecting piece can disperse vibration impact force, and vibration energy is prevented from being locally accumulated on the cable.

Description

Technical Field

[0001] This invention relates to the field of power transmission line technology, specifically to an adaptive damping device for suppressing wind-induced vibration in power transmission lines. Background Technology

[0002] As a core component of the power system, transmission lines are exposed to complex outdoor environments for extended periods, enduring the effects of natural factors such as wind, rain, snow, and temperature differences. Among these, wind-induced vibration is a critical issue threatening the safe operation of these lines. When airflow passes over the cable, it creates periodic vortices on the cable surface, causing lateral or longitudinal vibrations. If the wind speed is within a certain range, it may also induce resonance, leading to a significant increase in vibration amplitude. Prolonged and continuous wind-induced vibration can cause fatigue damage to the cable, manifesting as broken conductor strands, loose joints, and even cable detachment from towers. In severe cases, this can lead to large-scale power outages, posing a significant threat to the stability and reliability of the power system.

[0003] To address the issue of wind-induced vibration in power transmission lines, various wind-induced vibration suppression technologies have been developed and applied in the industry. However, all of these technologies have significant drawbacks. These devices typically employ fixed metal frames and clamping structures, rigidly fixing the cable within the frame and utilizing the rigidity of the metal components to suppress vibration. However, the core problem lies in the fact that rigid contact easily damages the cable: the metal clamping structure makes direct, hard contact with the cable insulation layer, generating severe friction during vibration, leading to insulation wear and cracking, thus shortening the cable's lifespan. Simultaneously, the rigid frame cannot adaptively adjust its angle to the cable's vibration, causing vibration energy to accumulate at the connection point between the device and the cable. This not only limits the suppression effect but may also exacerbate local stress concentration, potentially leading to new problems such as cable strand breakage. Furthermore, the installation of these devices requires high-precision positioning, making on-site construction difficult. Once installed, they cannot flexibly adapt to cables of different diameters, exhibiting extremely poor versatility.

[0004] Therefore, the present invention provides an adaptive damping device for suppressing wind vibration in power transmission lines. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides an adaptive damping device for suppressing wind-induced vibration in power transmission lines. This device stabilizes and clamps the cable while suppressing wind-induced vibration, ensuring that the cable remains in a reasonable installation position. This prevents cable slackness, misalignment, or friction with other components caused by vibration, ensuring stable cable conductivity, reducing additional power transmission losses due to abnormal line conditions, and helping to improve energy transmission efficiency. This aligns with the energy-saving and consumption-reducing requirements for power transmission line operation and maintenance.

[0006] The present invention provides the following technical solution: an adaptive damping device for wind vibration suppression of transmission lines, comprising a frame and several sets of connecting frames on the hinged frame. The connecting frame includes a connector hinged to the frame and an openable annular component installed on the connector. The annular component has three rotatable rubber wheels installed inside. The three rubber wheels contact the cable and secure it. The three rubber wheels rotate as the cable rotates.

[0007] Preferably, the annular component includes a fixed arc-shaped component mounted on the connector and a movable arc-shaped component hinged to the arc-shaped component, and the bottom of the movable arc-shaped component is mounted on the connector and tightened by bolts.

[0008] Preferably, two rubber wheels are disposed on the inner side of the fixed arc-shaped component, and one rubber wheel is disposed on the inner side of the moving arc-shaped component. The three rubber wheels on the inner sides of the fixed arc-shaped component and the moving arc-shaped component are arranged in a ring array.

[0009] Preferably, the three rubber wheels are parallel in direction and clamp the cable simultaneously.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] (1) The device, through the hinged structure of the connecting frame and the frame, can adaptively adjust the angle according to the wind vibration of the cable. With the stable clamping of the cable by three rubber wheels, it can effectively buffer the vibration energy of the cable under the action of wind. When the cable vibrates laterally or longitudinally due to wind, the flexible rotation of the connecting parts can disperse the vibration impact force and avoid the accumulation of vibration energy in the local area of ​​the cable. At the same time, the characteristic of the rubber wheels rotating synchronously with the cable reduces the rigid friction between the cable and the device, further weakens the vibration transmission, and significantly reduces the risk of fatigue damage, strand breakage or even fracture of the cable due to long-term wind vibration. It significantly improves the operational stability and safety of the transmission line in complex wind environment.

[0012] (2) The device adopts a design with three rubber wheels in flexible contact with the cable, which can effectively avoid squeezing and scratching the cable insulation layer compared with the traditional rigid clamping structure. On the one hand, the high elasticity of the rubber wheels can form a buffer when clamping the cable, and can maintain a soft contact state even during vibration, preventing the insulation layer from being damaged due to rigid friction; on the other hand, the three rubber wheels are evenly distributed in a ring array, ensuring that the clamping force is distributed on the cable surface, without local force concentration, avoiding deformation or cracking of the insulation layer due to excessive pressure at a single point, effectively protecting the cable insulation performance and extending the cable service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 For the present invention Figure 1A partial structural diagram.

[0015] In the diagram: 1. Frame; 2. Connecting frame; 3. Connector; 4. Ring-shaped part; 5. Rubber wheel; 41. Fixed arc-shaped part; 42. Moving arc-shaped part. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. In order to keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0017] Please see Figure 1 and Figure 2 Based on the actual diameter of the cables of the transmission line to be installed, the appropriate dimensions of each core component are determined. Frame 1 is made of high-strength aluminum alloy, and its overall dimensions must be designed in conjunction with the installation spacing of each set of connecting brackets 2. The length of frame 1 can be cut according to the actual cable span requirements. Multiple sets of connecting brackets 2 can be installed on a single section of frame 1 to achieve stable support for the cable. Connector 3 is made of stainless steel, and its thickness must meet the structural strength requirements for outdoor use. A shaft hole matching frame 1 must be reserved at the hinge end of connector 3. The size of the shaft hole must ensure that connector 3 can rotate flexibly after hinged with frame 1 to avoid jamming.

[0018] Ring-shaped component: The ring-shaped component consists of a fixed arc-shaped component 41 and a movable arc-shaped component 42, which together form the ring-shaped component 4. Both are made of engineering plastic and molded using an injection molding process. The curvature of the fixed arc-shaped component 41 and the movable arc-shaped component 42 must be strictly matched with the diameter of the cable to be installed to ensure that after being combined with the rubber wheel 5 installed later, they can tightly fit the cable surface and form a stable clamping structure. Bolt holes need to be pre-drilled at the bottom of the movable arc-shaped component 42. The size of the bolt holes must be compatible with the matching fastening bolts. The fastening bolts are made of stainless steel to cope with the complex outdoor environment and prevent corrosion damage during long-term use.

[0019] Rubber wheel 5: Rubber wheel 5 is made of highly elastic and wear-resistant rubber material. A metal bushing is embedded inside the wheel core. Bearing mounting positions need to be reserved at both ends of the bushing for subsequent mating with the mounting seat of the ring part 4. The dimensions of the three rubber wheels 5 must be completely consistent to ensure that the clamping force on the cable can be evenly distributed on the cable surface after installation, avoiding local wear or unstable fixation of the cable due to uneven clamping force.

[0020] All metal components, including frame 1, connector 3, metal bushings of rubber wheels 5, and matching bolts, must undergo comprehensive rust prevention treatment before installation. This can be achieved through galvanizing or spraying with anti-rust paint to enhance the corrosion resistance of the metal components. During outdoor use, these metal components should be inspected regularly for corrosion. If corrosion is found, timely maintenance and treatment are necessary to extend the service life of the device.

[0021] As the component that comes into direct contact with the cable, the rubber wheel 5 needs to be inspected regularly for wear. When the surface of the rubber wheel 5 shows obvious wear or cracks, it should be replaced with a new rubber wheel 5 in time to avoid the decrease in clamping force due to wear of the rubber wheel 5, which would affect the fixing effect and wind vibration suppression performance of the device.

[0022] First, assemble connector 3 with frame 1. Install connector 3 on the preset installation position of frame 1 via hinge shaft. Secure the hinge shaft with snap rings at both ends to prevent it from falling off during use. After assembly, manually test the rotational flexibility of connector 3 to ensure that it can rotate freely around the hinge shaft within a reasonable range without jamming or obstruction.

[0023] Next, fix the fixed arc-shaped part 41 to the top of the connector 3. The fixing method can be welding or bolt connection. Regardless of the method used, it is necessary to ensure that the fixed arc-shaped part 41 is installed firmly and maintains good perpendicularity with the connector 3 to avoid affecting the subsequent fit between the rubber wheel 5 and the cable due to installation tilt.

[0024] Rubber wheels 5 are installed on two preset mounting seats inside the fixed arc-shaped part 41. During installation, the rubber wheels 5 are connected to the mounting seats through bearings. The outer ring of the bearing is interference-fitted with the mounting seat to ensure that the bearing is fixed and stable. The inner ring is clearance-fitted with the bushing of the rubber wheel 5 to ensure that the rubber wheel 5 can rotate freely without significant resistance during rotation.

[0025] The movable arc-shaped component 42 is mounted on one end of the fixed arc-shaped component 41 via a hinge shaft. After installation, the smoothness of rotation of the movable arc-shaped component 42 needs to be tested to ensure that it can open and close flexibly. Then, a third rubber wheel 5 is installed on the mounting seat inside the movable arc-shaped component 42. The installation requirements are consistent with the installation standards of the rubber wheel 5 on the fixed arc-shaped component 41 to ensure the installation accuracy of the three rubber wheels 5.

[0026] After all the rubber wheels 5 are installed, the positions of the three rubber wheels 5 need to be adjusted so that the three rubber wheels 5 are arranged in a circular array, and the line connecting their axes forms an equilateral triangle structure. The intersection of the tangents of the three wheel surfaces must coincide with the center of the ring part 4, so as to ensure that the clamping points of the cable are evenly distributed and improve the stability of the cable fixation.

[0027] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. An adaptive damping device for suppressing wind-induced vibration in transmission lines, characterized in that: The system includes a frame (1) and several sets of connecting frames (2) on the hinged frame (1). The connecting frame (2) includes a connector (3) hinged to the frame (1) and an openable ring (4) mounted on the connector (3). The ring (4) has three rotatable rubber wheels (5) installed inside. The three rubber wheels (5) contact the cable and secure it. The three rubber wheels (5) rotate as the cable rotates.

2. The adaptive damping device for suppressing wind-induced vibration in transmission lines according to claim 1, characterized in that: The ring-shaped part (4) includes a fixed arc-shaped part (41) mounted on the connector (3) and a movable arc-shaped part (42) hinged on the arc-shaped part (41), and the bottom of the movable arc-shaped part (42) is mounted on the connector (3) by bolts and tightened.

3. The adaptive damping device for suppressing wind-induced vibration in transmission lines according to claim 2, characterized in that: Two rubber wheels (5) are set on the inner side of the fixed arc-shaped part (41), and one rubber wheel (5) is set on the inner side of the moving arc-shaped part (42). The three rubber wheels (5) on the inner side of the fixed arc-shaped part (41) and the moving arc-shaped part (42) are arranged in a ring array.

4. The adaptive damping device for suppressing wind-induced vibration in transmission lines according to claim 1, characterized in that: The three rubber wheels (5) keep their shafts parallel and clamp the cable at the same time.

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