Multi-response vibration damper assembly

A technology of damping system and inserts, which is applied in the direction of mechanical vibration attenuation devices, overhead lines/cable equipment, etc., can solve problems such as not so effective, and achieve the effect of reducing vibration

Inactive Publication Date: 2011-10-05
PREFORMED LINE PROD CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional dampers are less effective out

Method used

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  • Multi-response vibration damper assembly
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Embodiment Construction

[0026] The invention will now be described with reference to the drawings, in which like reference numerals are used to designate like parts. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It is evident, however, that the invention may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing the present invention.

[0027] Aeolian vibrations are high frequency, low amplitude motions most often caused by smooth laminar wind passing through a transmission line. When a wire or cable is exposed to this wind, a phenomenon known as "vortex" or "eddy current" causes vibrations on the line. Wind-induced vibration can cause hardware to fail, fatigue, wear, and eventually lead wires to failure. Vibration dampers are commonly used to control wind-induced vib...

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Abstract

A damper assembly system that can provide for multiple frequency responses to control Aeolian vibration in EHV (Extra High Voltage) applications is disclosed. The damper assembly comprises an asymmetric design that enables two disparate frequency responses at either side of the clamp that attaches the damper to a suspended member or cable. Two additional frequency responses are enabled at an inlet point of each of the damper weights. The damper weights can have a rounded or egg- shape together with an inner cavity so as to control corona discharge in EHV applications. Additionally, the tuned weights can be of disparate mass as well as asymmetric distances from the clamp.

Description

Background technique [0001] In utilities, transmission lines are used to direct electrical energy from one location to another over various distances. Vibration dampers are devices used to attenuate vibrations that often occur in suspended members such as overhead power transmission lines. Most commonly, a vibration damper consists of a pair of counterweights connected by stranded steel cables (commonly referred to as "pennant cables") and a clamp attached to the stranded cables at an intermediate position between the counterweights. The clamp enables the attachment of the damper to the suspended member or overhead power transmission line. [0002] The structure of the counterweight mounted on the end of the suspension cable is specially designed to resonate at frequencies determined to be suitable for the vibrations occurring in the transmission cable. Typical vibration dampers work by dissipating energy by deflecting the suspension cable and the kinetic energy of the count...

Claims

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Application Information

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IPC IPC(8): H02G7/14
CPCH02G1/02H02G7/14Y10T29/49117Y10T29/49826
Inventor B·凯森海瑟D·约翰逊
Owner PREFORMED LINE PROD CO
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