Overhead conductor wide-frequency-domain dynamic vibration reduction device based on electromagnetic damping technology

A vibration damping device and overhead wire technology, which is applied in mechanical vibration damping devices, shock absorbers, springs/shock absorbers, etc. Utilize and other problems to achieve the effect of broadening the vibration absorption frequency, increasing the system damping, and increasing the dancing threshold

Pending Publication Date: 2021-06-29
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the breeze vibration and ice-covered galloping generally have obvious vertical vibration characteristics, especially the breeze vibration, which occurs for a long time, but because it belongs to mechanical energy, and the frequency domain characteristics of the two are quite different, it is difficult for general resonance structures to transform their energy. and use

Method used

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  • Overhead conductor wide-frequency-domain dynamic vibration reduction device based on electromagnetic damping technology
  • Overhead conductor wide-frequency-domain dynamic vibration reduction device based on electromagnetic damping technology
  • Overhead conductor wide-frequency-domain dynamic vibration reduction device based on electromagnetic damping technology

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Experimental program
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Effect test

Embodiment 1

[0041] Electromagnetic damping technology and its application are research hotspots in the field of dynamic vibration reduction in recent years. By using the principle of electromagnetic conversion, the intrinsic viscous damping of the system is increased, so as to consume the mechanical energy of the system, convert the torsional kinetic energy of the line into heat energy release, and achieve passive vibration reduction. vibration effect.

[0042] Nonlinear Energy Sink (NES) theory is a new type of shock absorber technology developed on the basis of dynamic shock absorbers. By changing the linear stiffness and damping of traditional Introducing nonlinear springs) to achieve the purpose of broadening the range of vibration-absorbing frequencies and improving the vibration-damping effect. The optimized nonlinear vibration absorber can absorb the vibration energy of the main structure in a wide frequency range, and has the characteristics of small additional mass, strong adapta...

Embodiment 2

[0047] The physical design and installation are as follows: figure 1 , figure 2 as shown, figure 1 Both (a) and (b) design schemes can connect the outer casing with the wire and the spacer through the connecting plate.

[0048] Such as figure 1 As shown, a wide frequency domain dynamic vibration reduction device for overhead wires based on electromagnetic damping technology includes: a hollow shell 3, a permanent magnet 1, an induction metal sheet 2 and a spring 4, and the permanent magnet 1 and the induction metal sheet 2 are located in the casing 3; and one of the permanent magnet 1 or the induction metal 2 is rigidly connected to the inner wall of the housing 3, and the other is flexibly connected to the inner wall of the housing 3; under the action of vibration, the relative displacement of the permanent magnet 1 and the induction metal 2 produces Electromagnetic damping converts the vibration mechanical energy of the wire into consumption. There are two permanent mag...

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PUM

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Abstract

The invention provides an overhead conductor wide-frequency-domain dynamic vibration reduction device based on an electromagnetic damping technology. The overhead conductor wide-frequency-domain dynamic vibration reduction device comprises a hollow shell, permanent magnets and an induction metal sheet, wherein the permanent magnets and the induction metal sheet are located in the middle of the interior of the shell; one of the permanent magnets or the induction metal sheet is rigidly connected with the inner wall of the shell, and the other one of the permanent magnets or the induction metal sheet is flexibly connected with the inner wall of the shell; and under the action of vibration, the permanent magnets and the induction metal sheet perform relative displacement to generate electromagnetic damping to convert and consume the vibration mechanical energy of a conductor. While the device converts and consumes energy, the device also has the functions of improving the self-damping of the conductor, increasing the galloping threshold value of a bundle conductor, reducing the dynamic bending strain of the conductor at the outlets of suspension and strain clamps, and the like.

Description

technical field [0001] The invention relates to the field of disaster prevention and mitigation of power grids, in particular to a wide-frequency domain dynamic vibration reduction device for overhead wires based on electromagnetic damping technology. Background technique [0002] Wind-induced vibration of transmission lines is one of the common phenomena of overhead conductors, mainly including breeze vibration (5-120 Hz), sub-gap oscillation (1-3 Hz), ice galloping (0.1-3 Hz) and wind deflection. Among them, the breeze vibration and ice-covered galloping generally have obvious vertical vibration characteristics, especially the breeze vibration, which occurs for a long time, but because it belongs to mechanical energy, and the frequency domain characteristics of the two are quite different, it is difficult for general resonance structures to transform their energy. and exploit. Contents of the invention [0003] In order to overcome the defects of the prior art, a wide f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/03F16F15/067H02G7/14
CPCF16F15/035F16F15/046F16F15/067F16F2222/06F16F2238/026H02G7/14
Inventor 赵彬杨加伦张立春刘彬费香泽程永锋王景朝展雪萍李鹏姬昆鹏
Owner CHINA ELECTRIC POWER RES INST
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