US3260789A - Bundled conductor spacer damper - Google Patents

Bundled conductor spacer damper Download PDF

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Publication number
US3260789A
US3260789A US332210A US33221063A US3260789A US 3260789 A US3260789 A US 3260789A US 332210 A US332210 A US 332210A US 33221063 A US33221063 A US 33221063A US 3260789 A US3260789 A US 3260789A
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US
United States
Prior art keywords
conductors
mass
conductor
energy absorption
bundled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US332210A
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English (en)
Inventor
Aubrey T Edwards
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Individual
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Individual
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Priority to US332210A priority Critical patent/US3260789A/en
Priority to GB50774/64A priority patent/GB1021289A/en
Priority to SE15094/64A priority patent/SE305894B/xx
Priority to CH1627564A priority patent/CH421217A/fr
Priority to DE1964B0079786 priority patent/DE1465352B1/de
Priority to FR999145A priority patent/FR1417789A/fr
Priority to BE657311D priority patent/BE657311A/xx
Application granted granted Critical
Publication of US3260789A publication Critical patent/US3260789A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
    • F16F7/116—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted on metal springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/12—Devices for maintaining distance between parallel conductors, e.g. spacer
    • H02G7/125—Damping spacers

Definitions

  • This invention relates to spacers for bundled transmission line conductors and, more particularly, to spacers capable of dampening vibration in such conductors.
  • weights which are either resiliently connected to single conductors to absorb energy therefrom, or are fixedly connected to single conductors with their centers of gravity spaced from the vertical plane of the conductor, so as to cause the condoctor to twist and thus dissipate energy by inter-strand friction.
  • Devices using various combinations of the above principles have also been tried.
  • frequencies of vibration are determined by a number of factors including conductor diameter, stranding arrangement, cross sectional shape, weight per unit length, span between supporting towers, temperature and tension at which the conductor is operating, and wind speed and direction.
  • Galloping causes motion of the conductors in both the vertical and the horizontal planes, the latter being in a plane substantiallyparallel to the ground and normal to the axes of the conductors.
  • spacers for the bundled conductors consisting of a length of wire rope having clamping means at each end and a spring inter-connecting the clamping means coaxial with the wire rope.
  • Such spacers are of generaly simple construction, designed to merely maintain the conductors at their given design distances apart, and no attempt is made to prevent vibration.
  • the present invention has for its primary object the provision of a spacer for bundled conductor transmission lines incorporating therein dampening mechanism to reduce the vibrations on the line.
  • Another object of this invention is to employ a spacer for bundled conductor lines having an energy absorbing device incorporated therein to dampen vibrations induced in the conductors in a vertical plane.
  • a further object is to provide a unified vibration damper to replace the plurality of separate dampers commonly employed on the sub-conductors of a bundled line close to the support points.
  • One of the features of this invention is to provide a conductor spacer damper for bundled transmission lines comprising a clamp to couple the device to each of the conductors in the bundle and an energy absorbing device comprising a helical shaped spring having high internal friction between the clamp and a centrally disposed mass.
  • the combination of the mass and the internal friction of the energy absorbing device function to dissipate the vibration energy of the conductors in both the horizontal and vertical planes.
  • FIG. 1 is a side view in elevation of one embodiment of the spacer damper of this invention
  • FIG. 2 is a plan top view of the device shown in FIG. 1; and i FIG. 3 is a cross section through the spring element used in this invention, taken in plane 33 shown in FIG. 2.
  • FIGS. 1 and 2 show a portion of a transmission line having a pair of conductors 10 and 11 which together form the transmission line conductors for one phase of a system.
  • these conductors are supported between towers in a known and usual manner.
  • the two conductors 10 and 11 are spaced apart at given intervals between the towers by means of a plurality of spacer damper structures 12 which serve not only to maintain the distance between conductors 10 and 11 but also to dampen the vibration of the conductors, as will be described below.
  • the spacer damper structure of this invention comprises a centrally disposed mass 14 joined on either side to energy absorbing devices 16 and 18.
  • the devices 16 and 18 comprise a helical spring formed of stranded steel 19 covered with a coating 21 such as rubber, having high internal damping. It also may be possible to use solid steel in lieu of the stranded steel, as will be hereinafter pointed out.
  • the mass 14 is supported by the conductors 10 and 11 by means of the springs 16 and 18. At moderately low wind velocity the conductors will vibrate in the vertical direction.
  • the mass 14 and the stiffness of the springs 16 and 18 considering also the effects of the conductor stiffness and the mass of the conductor clamps, relative motion may be provided between the mass 14 and the conductors 10 and 11. If an appropriate damping effect (i.e. a capacity for absorbing or dissipating energy) is incorporated between each conducfor 10 and 11 and the mass 14, the spacer will absorb or dissipate vibrational energy due to the relative motion between the conductors 10 and 11 and the mass 14.
  • the vibration energy of the conductors can be reduced or dissipated to a level which will not cause conductor fatigue and will thus eliminate the need for the separate vibration dampers which are normally coupled to the conductors adjacent the supporting towers. This is of great advantage in the design of extra high voltage transmission lines since it will reduce the number of potential sources of corona and radio interference.
  • the energy spring, or elastic means such as elements 16 and 18, must have incorporated therein a capacity for absorbing or dissipating energy.
  • the use of stranded steel in helical configuration can provide, through utilization of inter-strand friction, a sufficient capacity for energy absorbing or dissipation.
  • a suitable rubber coating 21 on a solid steel spring core will often provide sufficient capacity for energy absorption or dissipation.
  • the spacer damper of this invention comprises a central mass 14, a plurality of conductor clamps 20 and 22 which engage the conductors 10 and 11, and energy absorbing or dissipating devices 16 and 18 which join the clamps 20 and 22 to the centrally disposed mass 14.
  • the clamps 20 and 22 may be of any conventional design suitable for the purposes intended; the design of the clamps forms no part of this invention.
  • the spacer damper be tuned to a representative frequency, e.g. the center frequency of this band, so that effective damping is achieved over the band range. This turning may be accomplished by the proper selection of the mass 14.
  • Spacer damper assembly is connected to a pair or more of conductors in a bundled conductor transmission line comprising:
  • said energy absorption or dissipation means comprising a helical spring composed of stranded wire to provide a high coefiicient of internal friction; mass centrally disposed between said clamps and coupled to the other end of said energy absorption or dissipation means to provide relative motion between the conductors and said mass upon movement of said conductors;
  • said mass having a greater weight per unit of axial length than said energy absorption means.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Vibration Dampers (AREA)
US332210A 1963-12-20 1963-12-20 Bundled conductor spacer damper Expired - Lifetime US3260789A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US332210A US3260789A (en) 1963-12-20 1963-12-20 Bundled conductor spacer damper
GB50774/64A GB1021289A (en) 1963-12-20 1964-12-14 Bundled conductor spacer damper
SE15094/64A SE305894B (en(2012)) 1963-12-20 1964-12-14
CH1627564A CH421217A (fr) 1963-12-20 1964-12-17 Dispositif d'écartement et d'amortissement reliant plusieurs conducteurs faisant partie d'une même phase d'une ligne de transmission aérienne à conducteurs de phase liés
DE1964B0079786 DE1465352B1 (de) 1963-12-20 1964-12-17 Abstandhalter zwischen zwei freileitungen
FR999145A FR1417789A (fr) 1963-12-20 1964-12-18 Dispositif d'écartement et d'amortissement destiné à être relié à plusieurs câbles faisant partie d'une ligne de transmission à conducteurs liés
BE657311D BE657311A (en(2012)) 1963-12-20 1964-12-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US332210A US3260789A (en) 1963-12-20 1963-12-20 Bundled conductor spacer damper

Publications (1)

Publication Number Publication Date
US3260789A true US3260789A (en) 1966-07-12

Family

ID=23297212

Family Applications (1)

Application Number Title Priority Date Filing Date
US332210A Expired - Lifetime US3260789A (en) 1963-12-20 1963-12-20 Bundled conductor spacer damper

Country Status (6)

Country Link
US (1) US3260789A (en(2012))
BE (1) BE657311A (en(2012))
CH (1) CH421217A (en(2012))
DE (1) DE1465352B1 (en(2012))
GB (1) GB1021289A (en(2012))
SE (1) SE305894B (en(2012))

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856267A (en) * 1973-01-12 1974-12-24 Kaman Aerospace Corp Vibration isolator
US3906143A (en) * 1974-07-26 1975-09-16 Beaudoin Roger Damper spacer for bundle conductor
US4011397A (en) * 1974-03-25 1977-03-08 Bouche Raymond R Vibration damper for high voltage cables
US20030234114A1 (en) * 2000-06-08 2003-12-25 Ralph Sutehall Aerial cable installation and aerial cable suspension device therefor
US20040062594A1 (en) * 2002-09-09 2004-04-01 Findeco S.R.L. Connection group for movable road barriers
CN102170101A (zh) * 2010-12-29 2011-08-31 汉中群峰机械制造有限公司 高压输电线路防风诱振荡导线间隔器
US9620947B2 (en) 2012-11-08 2017-04-11 Albert S. Richardson, Jr. Antigalloping device
CN108018862A (zh) * 2018-01-11 2018-05-11 西南交通大学 一种适用于被动防护网且便于巡检的柔性基础部件
CN108462135A (zh) * 2018-05-12 2018-08-28 固力发电气有限公司 一种防共振双分裂间隔棒
CN110380374A (zh) * 2019-07-26 2019-10-25 山东大学 一种多级复合型耗能防舞动间隔棒
CN111030021A (zh) * 2019-11-28 2020-04-17 中国电力科学研究院有限公司 一种减振装置以及包括减振装置的导线低频振动抑制装置
CN113488947A (zh) * 2021-06-25 2021-10-08 安徽博晟亿电力科技有限公司 一种高空安装防坠落的防振锤及其实施方法
US11248676B2 (en) * 2018-06-07 2022-02-15 Preformed Line Products Co. Vibration damper

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW293963B (en(2012)) * 1994-07-15 1996-12-21 Morgan Crucible Co
FR2977923A1 (fr) * 2011-07-12 2013-01-18 Peugeot Citroen Automobiles Sa Systeme d'amortissement des vibrations fixe sur deux cables paralleles
CN105375423A (zh) * 2015-12-10 2016-03-02 贵州电网有限责任公司输电运行检修分公司 防扭转回转型间隔棒
CN106877264B (zh) * 2017-04-20 2018-03-23 山东大学 一种防舞动碰撞耗能减振装置
CN109818322A (zh) * 2019-02-19 2019-05-28 山东大学 一种自适应电磁耗能防舞动减振装置
CN114977056B (zh) * 2022-06-17 2024-05-24 广东电网有限责任公司 一种基于单电机馈能式电磁阻尼器的间隔棒

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2520442A (en) * 1948-08-24 1950-08-29 E L Green Combined shock and vibration mount
US2758629A (en) * 1951-09-26 1956-08-14 Allen D Lewis Apparatus for manufacturing multiple wire stranded helical springs
GB827743A (en) * 1956-06-14 1960-02-10 Metalastik Ltd Improvements in or relating to cable spacers for multi-conductor, electrical, overhead transmission lines
US2987308A (en) * 1957-08-08 1961-06-06 Nordberg Manufacturing Co Rubber coated spring assemblies
FR1315475A (fr) * 1961-02-20 1963-01-18 British Insulated Callenders Perfectionnements à des entretoises destinées à des conducteurs électriques aériens groupés

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE839215C (de) * 1948-12-06 1952-05-19 Brown Abstandhalter fuer Buendelleiter
DE815907C (de) * 1950-01-01 1951-10-04 Motorrad U Fahrradteilefabrik Abfederung fuer Fahrzeuge, insbesondere fuer Kraftradgabeln
DE1054285B (de) * 1954-02-17 1959-04-02 Ferroviaires Soc Gedaempfte Schraubendruckfeder, insbesondere fuer die Aufhaengung von Fahrzeugen
DE1114552B (de) * 1958-09-22 1961-10-05 Kronprinz Ag Abstandhalter fuer Buendelleiter
DE1861546U (de) * 1958-10-01 1962-11-08 Pfisterer Elektrotech Karl Nachgiebiger abstandlhalter fuer freileitungen.
DE1115323B (de) * 1960-01-11 1961-10-19 Kronprinz Ag Abstandhalter fuer Buendelleiter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2520442A (en) * 1948-08-24 1950-08-29 E L Green Combined shock and vibration mount
US2758629A (en) * 1951-09-26 1956-08-14 Allen D Lewis Apparatus for manufacturing multiple wire stranded helical springs
GB827743A (en) * 1956-06-14 1960-02-10 Metalastik Ltd Improvements in or relating to cable spacers for multi-conductor, electrical, overhead transmission lines
US2987308A (en) * 1957-08-08 1961-06-06 Nordberg Manufacturing Co Rubber coated spring assemblies
FR1315475A (fr) * 1961-02-20 1963-01-18 British Insulated Callenders Perfectionnements à des entretoises destinées à des conducteurs électriques aériens groupés

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856267A (en) * 1973-01-12 1974-12-24 Kaman Aerospace Corp Vibration isolator
US4011397A (en) * 1974-03-25 1977-03-08 Bouche Raymond R Vibration damper for high voltage cables
US3906143A (en) * 1974-07-26 1975-09-16 Beaudoin Roger Damper spacer for bundle conductor
US20030234114A1 (en) * 2000-06-08 2003-12-25 Ralph Sutehall Aerial cable installation and aerial cable suspension device therefor
AU2001262519B2 (en) * 2000-06-08 2006-01-12 Prysmian Cables & Systems Limited Aerial cable installation and aerial cable suspension device therefor
US7049507B2 (en) * 2000-06-08 2006-05-23 Pirelli General Plc Aerial cable installation and aerial cable suspension device therefor
US20040062594A1 (en) * 2002-09-09 2004-04-01 Findeco S.R.L. Connection group for movable road barriers
CN102170101B (zh) * 2010-12-29 2012-11-21 汉中群峰机械制造有限公司 高压输电线路防风诱振荡导线间隔器
CN102170101A (zh) * 2010-12-29 2011-08-31 汉中群峰机械制造有限公司 高压输电线路防风诱振荡导线间隔器
US9620947B2 (en) 2012-11-08 2017-04-11 Albert S. Richardson, Jr. Antigalloping device
CN108018862A (zh) * 2018-01-11 2018-05-11 西南交通大学 一种适用于被动防护网且便于巡检的柔性基础部件
CN108018862B (zh) * 2018-01-11 2024-01-30 西南交通大学 一种适用于被动防护网且便于巡检的柔性基础部件
CN108462135A (zh) * 2018-05-12 2018-08-28 固力发电气有限公司 一种防共振双分裂间隔棒
US11248676B2 (en) * 2018-06-07 2022-02-15 Preformed Line Products Co. Vibration damper
CN110380374A (zh) * 2019-07-26 2019-10-25 山东大学 一种多级复合型耗能防舞动间隔棒
CN110380374B (zh) * 2019-07-26 2020-03-31 山东大学 一种多级复合型耗能防舞动间隔棒
CN111030021A (zh) * 2019-11-28 2020-04-17 中国电力科学研究院有限公司 一种减振装置以及包括减振装置的导线低频振动抑制装置
CN113488947A (zh) * 2021-06-25 2021-10-08 安徽博晟亿电力科技有限公司 一种高空安装防坠落的防振锤及其实施方法
CN113488947B (zh) * 2021-06-25 2022-08-12 安徽博晟亿电力科技有限公司 一种高空安装防坠落的防振锤及其实施方法

Also Published As

Publication number Publication date
DE1465352B1 (de) 1971-09-23
GB1021289A (en) 1966-03-02
CH421217A (fr) 1966-09-30
SE305894B (en(2012)) 1968-11-11
BE657311A (en(2012)) 1965-06-18

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