RU192516U1 - Split-wire dampener - Google Patents

Abstract

The utility model relates to the electric power industry and can be used as a damper for low-frequency vibrations of the wires of the split phase of overhead power lines (OHL). The technical result of the utility model is to increase the manufacturability, efficiency and reliability of the damper, simplifying its installation on the OHL. The damper contains a carrier frame 1 with two arches 2, 3 and a two-arm pendulum mounted on a torsion vibration damper 6. Arches 2 and 3 are made with parallel rectilinear rungs 4 and 5, and their ends 11 are pairwise connected by jumpers 12 with the possibility of triangular coverage of the end flanges 7 of the damper 6 with frame 1. Frame 1 is made of a metal pipe or of a metal profile. Flanges 7 are fixed in frame 1 using welding and are made rectangular or trapezoidal. 3 s.p. f-ly, 2 ill.

Description

Technical field

The utility model relates to the electric power industry and can be used as a damper of low-frequency oscillations (dances) of the wires of the split phase of overhead power transmission lines (OHL).

State of the art

Known absorber of low-frequency vibrations of split wires, containing a two-arch bearing frame and a two-arm pendulum mounted on a torsional vibration damper [RU 2610834].

In the known damper arches are made arcuate. Two arched arches are connected to the supporting frame using a pair of distance struts, each of which is equipped for this purpose with two locks designed to cover and fix the inclined sections of the arched arches. The ends of the arched arches are welded in pairs to the end flanges of the damper.

The prototype absorber is characterized by low technological design, the complexity of installation on overhead lines and insufficient reliability.

These disadvantages are due to the following.

Arches form a frame structure (supporting frame) only assembled with distance spacers equipped with the aforementioned locks. Therefore, the design of the prototype does not allow to separate the operations of the assembly of the damper and its installation on remote struts - these operations must be performed simultaneously. At the same time, in order to avoid damper-damper deviations of the damper with the two-arm pendulum from the required operating position, it is necessary to ensure high accuracy of several assembly and installation operations (when welding the ends of arches with end flanges of the damper, when fixing the arches in the locks of the spacers connecting the arches, when fixing the locks on tie rods).

In addition, since the arches are not parallel, even a slight displacement of the spacers along the arches leads to the appearance of additional mechanical stresses in the places of the welded fastenings of the ends of the arches to the end flanges of the damper.

Utility Model Essence

The object of the utility model is a damped oscillation damper containing a two-arch bearing frame and a two-arm pendulum mounted on a torsional vibration damper, characterized in that the arches of the bearing frame are made with parallel rectilinear crossbars, and the ends of the arches are connected in pairs with jumpers with the possibility of three-sided coverage of the end face flanges of the end flanges of the damper vibrations of the supporting frame.

This allows you to separate the operations of the assembly of the absorber and its installation on remote struts, and thereby increase the manufacturability of the design of the absorber, simplify its installation on overhead lines, and also increase the efficiency and reliability of the absorber by reducing the requirements for accuracy of assembly and installation.

The utility model has development, which consists in the fact that:

- the supporting frame is made of a metal pipe or of a metal profile;

- the end flanges of the torsional vibration damper are fixed in the carrier frame by welding;

- end flanges of the vibration damper are made rectangular or trapezoidal.

Implementation of a utility model, taking into account its developments

In FIG. 1 shows the inventive damper assembly. In FIG. 2 shows the inventive absorber suspended on the spacer wires of the split phase wires.

In FIG. 1 is indicated:

1 - supporting frame with two arches 2 and 3;

4 and 5 - parallel rectilinear crossbeams of arches 2 and 3, respectively;

6 - torsional vibration damper;

7 - end flanges of the damper 6;

8 - the central flange of the damper 6.

The composition of the two-shouldered pendulum mounted on the Central flange 8 of the damper 6, includes the rocker arms 9, mounted on the flange 8, and loads 10 at the ends of the rocker arm 9.

The ends 11 of the arches 2 and 3 are connected in pairs by jumpers 12. Each jumper 12 and the associated sidewalls 13 of the arch 2 and the arch 3 cover the corresponding flange 7 on three sides.

Frame 1 can be made of a metal pipe (round or rectangular section) or of a metal profile (closed or open section).

The flanges 7 of the damper 6 can be additionally fixed in the frame 1 by welding. They can be made rectangular (for example, square) or trapezoidal.

Damper 6 and the mint can be performed similarly to the prototype. Inside the damper 6, made of elastic material, there is a rigid support axis (not shown in the figures) fixed in the flanges 7. Under the flange 8, a plastic sleeve is installed on the support axis - a sliding bearing.

The supporting frame 1 of the arches 2, 3 with the crossbars 4, 5, sidewalls 13 and lintels 12, pairwise connecting the ends 11 of the arches, is made separately. Arches 2 and 3 may have, for example, a U-shaped or trapezoidal shape. A two-arm pendulum is mounted on the damper 6, welding the rocker arms 9 to the flange 8. Then, a damper 6 with the pendulum is installed in the manufactured frame 1 so that its elements 12 and 13 cover each flange 7 from three sides.

The assembled absorber is mounted on a pair of distance spacers, fixing the wires of the split phase of the overhead line. Each spacer 14 has a housing 15 connecting the clamps 16. (The design of the spacers are known, for example, from patents RU 2175806, RU 2613919, RU 2628998).

The absorber is led from below to the wires 17 fixed in the clamps 16 of the distance spacers 14. In this case, the lower wire 17 of the split phase freely passes between the arches 2 and 3 of the frame 1, which is then suspended on the spacers 14, for example, using straps and screws securing the crossbars 4 , 5 arches 2 and 3 on the buildings 15 struts 13.

In the claimed damper, unlike the prototype, the displacement of one or both spacers 14 along the parallel rectilinear crossbars 4 and 5 of the arches 2 and 3 does not cause mechanical stresses at the points of attachment of the flanges 7 to the frame 1. Such displacements are made when the damper is installed to evenly distribute its weight between two spacers 14.

The inventive damper operates as follows.

Transverse (vertical) vibrations of wires 17 swing a two-arm pendulum fixed on flange 8 (rocker arm 9 with loads 10), which in this case performs torsional vibrations around the aforementioned supporting axis of damper 6. When the pendulum swings, the central flange 8 rotates relative to the end flanges 7 fixed in the frame 1, due to the elasticity of the material of the damper 6. Due to the internal viscous friction in the elastic material of the damper 6, the torsional vibrations of the pendulum lag behind in phase from the transverse vibrations of the wires 17, which leads to Wuhan oscillations.

As can be seen from the above, the inventive damper is more technologically advanced, since all its main components, including the supporting frame 1, can be manufactured separately and then assembled into a general structure mounted on remote braces of split wires.

The installation process of a pre-assembled damper with the proposed implementation of the supporting frame 1 of two arches 2 and 3 having parallel rectilinear crossbars 4, 5 and jumpers 12, connecting the ends of the arches in pairs with the possibility of three-sided coverage of the end flanges 7 of the damper 6 with the supporting frame, is simpler and more convenient, than installing a prototype damper. Rectilinear crossbars 4 and 5, unlike arched, do not protrude beyond the level of the upper wires 17 of the split phase, which simplifies the installation of the absorber on overhead lines with a vertical arrangement of split phases.

Three-sided coverage of the flanges 7 with interconnected arches 2 and 3, as well as the absence of additional mechanical stresses when the spacers 14 are displaced along the straight rails 4 and 5 provide reliable fixation of the damper 6 in the frame 1 during the operation of the damper.

The execution of the flanges 7 rectangular or trapezoidal further simplifies the assembly of the damper and increases the reliability of fastening of the damper 6 in the carrier frame.

Claims (4)

1. An oscillation damper for split wires, comprising a two-arch bearing frame and a two-arm pendulum mounted on a torsional vibration damper, characterized in that the arches of the bearing frame are made with parallel rectilinear crossbars, and the ends of the arches are pairwise connected by jumpers with the possibility of three-sided coverage of the end flanges of the damper of torsional vibrations frame. 2. The vibration damper according to claim 1, wherein the carrier frame is made of a metal pipe or of a metal profile. 3. The vibration damper according to claim 1, wherein the end flanges of the torsional vibration damper are fixed in the carrier frame by welding. 4. The vibration damper according to claim 1, wherein the end flanges of the torsional vibration damper are rectangular or trapezoidal.

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