A Vibration Damping Device for Preventing Large Vibration of Transmission Lines
A technology of vibration damping device and transmission line, applied in the direction of mechanical vibration damping device, etc., can solve the problems of increase of structural frequency, failure, and weakening of vibration absorption effect of anti-vibration hammer, and achieve the effect of preventing large vibration and preventing vibration fatigue damage.
Active Publication Date: 2021-03-30
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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Problems solved by technology
However, as a flexible structure, the frequency of the transmission line is affected by the wind load, especially under the action of strong wind, the average wind resistance will cause a large static displacement of the transmission line, and a large additional tension force will be generated in the transmission line. The tension force will increase the frequency of the structure, and when the changed frequency differs greatly from the frequency of the anti-vibration hammer, the vibration-absorbing effect of the fixed-frequency anti-vibration hammer will weaken or fail
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, 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 belongs.
[0025] Such as figure 1 As shown, this embodiment provides a vibration damping device for preventing large-scale vibration of the transmission line, including a fixed part (including three parts of the fixed clamp 2, the connecting rod 3 and the fixing part 8), a flexible beam 7, two springs 6, Two moving plates 5, two mass blocks 4 and two baffles 9 respectively arranged at the two ends of the flexible beam;
[0026] One end of the fixed part is fixedly connected to the transmission line 1, and the other e...
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The invention relates to a damping device for preventing large-amplitude vibration of a power transmission line. The damping device comprises a fixed part, a flexible beam, two springs, two movable plates, two mass blocks and two baffles arranged at the two tail ends of the flexible beam correspondingly. One end of the fixing part is fixedly connected with a power transmission line, and the otherend of the fixing part is fixedly connected with the middle of the flexible beam to divide the flexible beam into a left part and a right part. The two movable plates are located on the left portion and the right portion of the flexible beam respectively and can move between the baffle and the fixing part. The two mass blocks are fixedly connected with the two moving plates respectively and move on the flexible beam along with the moving plates; the two springs are arranged on the left portion and the right portion of the flexible beam respectively in a sleeving mode, one end of each spring isconnected with one end of the fixed portion, and the other end of each spring is connected with the movable plate. The inherent frequency of the damper can be adjusted along with the change of the incoming flow wind speed.
Description
technical field [0001] The invention relates to the field of electric power transmission system design, in particular to a vibration damping device for preventing large-scale vibration of transmission lines. Background technique [0002] In the power transmission system, the transmission line has the characteristics of long span and soft structure, and is greatly affected by wind load. Under the action of wind load, the transmission line may generate large vibrations, which may cause fatigue damage or even fracture of the transmission line, affect the normal operation of the transmission line, cause national economic losses, and even threaten national personal safety. [0003] The current anti-vibration hammer is mainly a linear design, and the frequency of the anti-vibration hammer is fixed. According to the theory of vibration mechanics, the natural frequency of the anti-vibration hammer is generally designed to be equal to the first-order frequency or second-order freque...
Claims
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IPC IPC(8): H02G7/14
CPCH02G7/14
Inventor 易弢钱长照韩纪层周光伟林德源王健洪毅成严康骅钱健
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD