RU2655679C1 - Damping distance piece for wires of air transmission lines - Google Patents

Abstract

FIELD: electric power engineering.

SUBSTANCE: invention relates to power industry, namely to the damping distance spacers for the phase conductors, split into two or more components of overhead transmission lines of different voltage classes. Above spacer consists of body 1 made of an aluminum alloy representing a bulk frame, formed by vertical and horizontal ribs 2, 3. Cups 4 are integrated into frame 1, depending on the number of wires 5 in the split phase. In cups 4, damping nodes are placed, consisting of rubber damping elements 6 of the toroidal form. Damping elements 6 are connected by two dies 7 to each damping unit by means of special fastening elements. Set of special fasteners includes bolts 8 with fine thread, washers 9 and all-metal self-locking nuts 10. On slots 7, notches 11 are made, which extend at an angle with respect to longitudinal axis 12 of wire 5.

EFFECT: invention provides a spacer with high vibration characteristics, providing effective damping of oscillations from low to high frequencies, and acceptable reliability during long-term operation.

6 cl, 3 dwg

Description

The invention relates to the field of electric power, in particular to damping distance spacers for phase wires, split into two or more components of overhead power lines of various voltage classes.

Known spacer-suppressor for wires of the split phase of the overhead power line, containing rods made in the form of an elastic element by the number of wires of the split phase and fixed at one end in clamps mounted on the wires of the split phase, characterized in that the spacer is equipped with bushings mounted on elastic elements in the direction of their longitudinal axes, rigidly fastened to each other at one end in the center of the strut, which is the center of the split phase of the line, and crimped at several points on y other elements, while the diameter of each elastic element is selected smaller than the diameter of the bushings by 1 ÷ 3 mm, and each mentioned sleeve is mounted on the elastic element with a gap from the spacer clamp equal to 1 ÷ 3 mm, to ensure bending deformations of the elastic elements when the split wires oscillate phase of the line [1].

In this spacer-absorber, as shown by the practice of its application, effective damping of the wires of the split phase of the overhead power line is not achieved due to the damping properties of the elastic elements located with some freedom along the bushings.

Also known is a spacer-damper for wires of a split phase of an overhead power transmission line, comprising a housing, beams according to the number of wires of a split phase with clamp dies at one end for attaching the spacer to the wires and damper assemblies at the other end, located in the grooves of the housing, each damper the unit consists of elastomeric disks fastened by a vertical axis onto which covers with fasteners are mounted [2].

This spacer-damper for wires of the split phase of an overhead power line is well suited for operation on low-voltage overhead power lines, for example, below a voltage of 750 kV with splitting of no more than three to four components in the split phase. In addition, the design of the fasteners of the damping assemblies and the die clamps does not provide reliable fixation of the spacers on the line wires, due to the possibility of rolling the wires in the die clamps and the lack of means against the influence of bending moments on the damping elements of the damping assemblies.

The applicant set a specific goal - to develop a damping distance spacer for the wires of overhead power transmission lines of various voltage classes, characterized by high damping efficiency, operational reliability, ease of manufacture and installation. This positive technical result was achieved due to a new set of essential structural features of a damping remote spacer for wires of an overhead power transmission line, presented in the following claims: "a damping remote spacer for wires of an overhead power transmission line, consisting of a body made of aluminum alloy and consisting of volumetric frame formed by vertical and horizontal ribs integrated into the above frame glasses, in the amount of two, three, four, five or eight, selected depending on the number of wires in the split phase, and designed to accommodate damping nodes, consisting of at least two rubber damping elements of a toroidal shape, connected to, at least two dies for each damping unit by means of special fasteners, including a set of bolts, washers and self-supporting devices, with at least one notch located relative to the dies the longitudinal axis of the wire at an angle whose value is chosen in the range of 0 to 15 degrees; bolts of special fasteners are made with fine thread; all-metal self-locking nuts were used as the aforementioned self-locking devices. ”

The invention is illustrated by drawings, where in FIG. 1 shows a general view of a damping spacer for wires of an overhead power transmission line made in accordance with the present invention, an embodiment of phase splitting into three components; in FIG. 2 is the same as in FIG. 1, a section of a spacer along a damping assembly; in FIG. 3 is the same as in FIG. 1, a cross-section of a spacer on a die.

The inventive damping distance spacer for the wires of an overhead power line consists of a housing 1 made of aluminum alloy. The housing 1 is a three-dimensional frame formed by vertical and horizontal ribs 2, 3. In the frame 1 are integrated (that is, made as a single structure) glasses 4, the number of which is selected depending on the number of components (wires) 5 in the split phase, for example , two, three, four, five or eight glasses 4, depending on what voltage the overhead power line is designed for. In the glasses 4 are placed damping nodes, consisting of two or more rubber damping elements 6 of a toroidal shape. The damping elements 6 are connected at least (maybe more) by two dies 7 to each damping unit by means of special fasteners. A set of special fasteners includes bolts 8 with small thread, washers 9 and all-metal self-locking nuts 10. On the dies 7, notches 11 are made, which extend relative to the longitudinal axis 12 of wire 5 at an angle, the value of which is selected from 0 to 15 degrees.

The invention works as follows:

Before installing the spacers on the overhead power line, the bolts 13 of the dies 7 are loosened, they are inserted into the split phase, turning the plane of the spacer perpendicular to the axis of the split phase, and the housing 1 is fixed on each wire 1, tightening the bolts 13 of the dies 7 by the nuts 14 until the moment of tightening, which excludes uncoupling.

When vibrations (sub-vibrations) occur, the deformation of the rubber damping elements 6 occurs and the vibration energy of the wires 5 is spent on overcoming (compensating) the internal deformations of the material, for example, special rubber damping elements 6 of the damping nodes, which effectively dampens the vibrations of the split phase wires arising on overhead lines power transmission.

The inventive damping distance spacer for overhead power line wires of mainly high and ultra-high voltage is characterized by high vibration characteristics, providing effective damping of vibrations from low to high frequencies, and acceptable reliability during long-term operation, since reliable fixation of the spacer on the line wires is achieved, due to with the exception of scrolling the wires in the dies (due to a special notch in them) and reducing the effect of bending moments on the damping elements of damping assemblies through the use of bolts of special fasteners with fine thread, as well as self-locking devices, namely, all-metal self-locking nuts.

Information sources

one]. Description of the invention to the patent “Spacer-suppressor for wires of the split phase of an overhead power line” No. 2331147, Н02G 7/12, filed April 6, 2007, published August 10, 2008 Bull. Number 22.

[2]. Description of the invention to the patent “Spacer-damper for wires of an overhead power line” No. 2375800, Н02G 7/12, claimed on November 14, 2008, published on December 10, 2009.

[3]. Description of the invention to the patent “Spacer-suppressor for two wires of the split phase of an overhead power line” No. 2334327, Н02G 7/00, claimed on 05.21.2007, published on 09.20.2008 Bull. No. 26.

[four]. Utility Model Patent “Interphase Isolating Spacer” No. 136930, Н02G 7/12, filed July 17, 2013, published January 20, 2014.

[5]. Description of the invention to the copyright certificate “Remote spacer-vibration damper for wires of the split phase of an overhead power line” No. 1823057, Н02G 7/12, 7/14, claimed on 05.17.1990, published on 06.23.19938 Bull. Number 23.

[6]. European patent "Damping spacer for wires of the split phase of high voltage overhead power lines with fiber optic cable inside the split phase" No. 308692, H02G 7/12, published 09/29/1989.

[7]. Description of the invention to the copyright certificate “Remote spacer-damping oscillation” No. 1381636, Н02G 7/12, 7/14, filed March 31, 1986, published March 15, 1988.

Claims (6)

1. A damping spacer for wires of an overhead power line, consisting of a housing, damping assemblies connected to at least two notched dies for each damping assembly by means of fasteners, characterized in that the housing is a three-dimensional frame formed by vertical and horizontal ribs, damping nodes are located in glasses integrated in the frame of the housing, selected in an amount depending on the number of wires in the split phase, each damping node consists of at least two damping elements toroidal shape, the notches in the plates are arranged relative to the longitudinal axis of the wire at an angle. 2. The spacer according to claim 1, characterized in that the housing is made of aluminum alloy. 3. The spacer according to claim 1, characterized in that the angle of the notches on the dies relative to the longitudinal axis of the wire is selected in the range from 0 to 15 degrees. 4. The spacer according to claim 1, characterized in that the fixture of the damping nodes consists of a set of bolts, washers and self-locking devices. 5. The spacer according to claim 4, characterized in that all-metal self-locking nuts are used as self-locking devices. 6. The spacer according to claim 4, characterized in that the fastener bolts are made with fine thread.

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