CN201682246U - Damping anti-galloping device of simple pendulum hammer - Google Patents

Abstract

The utility model relates to a damping anti-galloping device of a simple pendulum hammer, which comprises a link plate, a damping vibration attenuation structure and a pendulum hammer structure, wherein a mounting hole which is used for connecting with a spacer is arranged on the link plate, the damping vibration attenuation structure comprises a spring structure and a damper, the spring structure is positioned between the link plate and the damper, and the pendulum hammer structure comprises a hammer head and a connecting rod which is respectively connected with the hammer head and the damper. First, the anti-galloping device adopts the damping vibration attenuation structure to connect the link plate with the pendulum hammer structure, when an overhead power transmission line waves, the functions of buffering energy, absorbing energy and consuming energy are realized, and the purpose of suppressing the galloping is finally realized; second, the anti-galloping device has simple structure, good anti-galloping performance, convenient installation and good economy, and is applicable to being popularized and used in large scale; and then the connecting rod is used for realizing the movable connection of the hammer head and the damper, when a lead is twisted and swings, the hammer head keeps in the vertical upwards direction all the time, so the twisting damping parameter of the overhead power transmission line can be changed, and the effect of suppressing the galloping of the overhead power transmission line is achieved.

Description

A single pendulum damping anti-dancing device

technical field

The utility model belongs to the field of electric fittings, in particular to a single pendulum damping dance preventer for overhead power transmission lines.

Background technique

A low-frequency, large-amplitude self-excited vibration generated by the eccentric ice-coated conductor under wind excitation when the transmission line is galloping. The vibration frequency is usually 0.1-3Hz, and the amplitude is about 5-300 times the diameter of the conductor. When galloping occurs, the full-scale overhead transmission line vibrates in a directional wave, and the center of the cross-section of the conductor has an elliptical motion track on a plane perpendicular to the direction of the conductor. Due to excessive amplitude, galloping can easily cause phase-to-phase flashover, hardware damage, tripping and power failure, wire breakage, and tower downfall, which pose a serious threat to the safe operation of the line and cause major economic losses and social impacts.

How to prevent the occurrence of wire galloping has not yet seen a very perfect method. The existing anti-galling methods usually use the following: (1) improve the rigidity of the structure; (2) improve the internal damping of the structure; (3) Under the conditions of reducing the natural frequency or damping of the structure, increase the structural mass; (4) reduce the flow velocity, but for overhead transmission lines, the anti-dancing methods of (1), (3), and (4) are not realistic. Only by improving the damping of the wire structure and dissipating the energy input into the wire system is the fundamental way to suppress galloping. For split conductors, due to the change of the torsional characteristics of the conductors, the excitation mode coupled with torsional vibration and transverse vibration is an important form of ice-coated galloping of the split conductors, and the suppression of the torsional excitation modes of the split conductors is another important content of dance prevention. For the traditional anti-dance device composed of the direct connection of the connecting plate and the hammer head, it is impossible to suppress both lateral and torsional galloping excitations at the same time, so it cannot meet the needs of economy and practical engineering.

Tuned mass dampers have been widely used in building structures. Its working principle is to adjust its own vibration frequency to the frequency of the main structure and change the resonance characteristics of the structure to achieve vibration reduction. The ice-covered galloping of the conductor system is characterized by low frequency and large amplitude. The low damping and torsional coupling vibration of the conductor system are the important reasons and methods for exciting the galloping of the conductor. Improve the internal damping of the structure to design an anti-flying device that can effectively suppress the galloping of the wire.

Utility model content

In order to overcome the defects of the prior art, the purpose of the utility model is to provide a single pendulum damping anti-dancing device with good anti-dancing performance, simple structure and convenient installation.

For this reason, the utility model proposes a single pendulum damping anti-dancing device, including a connecting plate, a damping vibration reduction structure and a pendulum structure, and the connecting plate is provided with a mounting hole for being connected with a spacer rod. The damping vibration reduction structure includes a spring structure and a damper, the spring structure is placed between the connecting plate and the damper, and the pendulum structure includes a hammer head and a connecting rod connected with the hammer head and the damper respectively.

Wherein, the damper includes an annular damping material, a metal shell and a piston rod, the damping material is arranged inside the metal shell, one end of the piston rod is fixedly connected in the central hole of the damping material, and the other end of the piston rod is connected to the spring structure or pendulum structure connected.

Wherein, the damper includes a ring-shaped damping material, a metal shell and a piston rod, the damping material is arranged inside the metal shell, the piston rod passes through the central hole of the damping material and its two ends are respectively connected to the spring structure and the pendulum The hammer structure is connected, and the middle part of the piston rod is fixedly connected with the damping material.

Wherein, the spring structure includes a spring seat and a compression spring. An adjustment bolt is connected to the spring seat. The compression spring is sleeved on the adjustment bolt and placed in the spring seat. The upper end of the adjustment bolt is fixed to the connecting plate. catch.

Wherein, when the number of the spring structure is one, it is located at the center of the upper end of the damper.

Wherein, when the number of the spring structures is a positive integer greater than 1, they are located at the upper end of the damper and arranged symmetrically around the central longitudinal axis of the damper.

The beneficial effects of the utility model are:

1) Since the utility model adopts the damping and vibration reduction structure, when the overhead transmission line gallops, it can realize the functions of buffering energy, absorbing energy, and consuming energy, and finally achieves the purpose of suppressing galloping. In addition, the anti-dance device has simple structure, good anti-dance performance, convenient installation, good economic performance, and is suitable for large-scale popularization and use.

2) The utility model realizes the movable connection between the hammer head and the damper through the connecting rod, so when the wire is twisted, the hammer head always maintains a vertical downward direction, which can change the torsional damping parameters of the overhead transmission line, thereby achieving suppression of overhead transmission lines. The effect of transmission line galloping.

Description of drawings

Fig. 1 is a schematic structural view of embodiment one of the dance preventer described in the utility model;

Fig. 2 is the structural representation of embodiment two of the anti-dance device described in the utility model;

Among them, 1-connecting plate, 2-spring structure, 21-spring seat, 22-compression spring, 3-damper, 31-damping material, 32-metal shell, 33-piston rod, 34-connecting rod, 4-pendulum Hammer structure, 41-connecting rod, 42-hammer head, 5-adjusting bolt.

Detailed ways

Below in conjunction with accompanying drawing, dance preventer of the present utility model is described in further detail.

Example 1

As shown in FIG. 1 , the dance preventer of this example includes a connecting plate 1 , a damping structure and a pendulum structure 4 . The connecting plate 1 is provided with mounting holes for connecting with the spacer bar, and the connecting plate 1 is fixedly connected to the spacer bar body (not shown in the figure) by bolts, and is used for fixedly connecting the damping structure and the spacer bar body. The damping and vibration reduction structure mainly includes a spring structure 2 and a damper 3, which suppress galloping by dissipating the energy input into the wire system; the spring structure 2 is installed between the connecting plate 1 and the damper 3 to absorb energy. When the wire of the transmission line is about to gallop, the energy that prompts the wire to gallop is very large. The spring structure 2 can store energy in the spring by compressing the spring and then release it slowly. The damping structure can include n A spring structure (n is a positive integer ≥ 1), when one spring structure 2 is used, its lower end is connected to the center of the upper end of the damper 3; when more than two spring structures 2 are used, they are evenly distributed on the damper 3 around the central longitudinal axis and connected with the upper end of the damper 3. In this example, two spring structures 2 are used, which are symmetrically arranged on both sides of the upper end of the damper 3 , and the energy stored in the spring structures can be released through the damper 3 . The spring structure 2 mainly includes a spring seat 21 and a compression spring 22. An adjustment bolt 5 is connected to the spring seat 21. The compression spring 22 is sleeved on the adjustment bolt 5 and placed in the spring seat 21. The upper end of the adjustment bolt 5 and the connecting plate 1 Phase fixed connection.

The damper 3 is connected to the spring structure 2 to digest and absorb the release of the buffer energy of the spring structure. It can realize the functions of vibration reduction, balance, buffering and vibration elimination through a certain mechanical structure, so that the anti-dancing device can realize its own buffering For the purpose of energy, energy consumption, and galloping suppression, the damper 3 has large energy storage, no maintenance, no aging phenomenon, reliable operation, and easy installation. The damper 3 includes a metal shell 32 and an annular damping material 31 and a piston rod 33 placed inside the metal shell. The damping material 31 in this example is fixed on the inner top of the metal shell 32 by an adhesive, and the piston rod 33 One end is bonded in the central hole of the damping material 31, and the other end is affixed to the connecting rod 41 of the pendulum structure 4 (or the pendulum structure 4 and the connecting rod 41 are directly made into an integral structure); the damping material 31 is also It can be fixed to the inner bottom end of the metal shell 32 by adhesive, one end of the piston rod 33 is bonded in the central hole of the damping material 31, and the other end is connected with the spring structure. The damping material 31 can be high viscosity damping material, elastic damping material or other forms of damping material.

The pendulum structure 4 is connected to the lower end of the damper 3. The pendulum structure 4 mainly includes a connecting rod 41 and a hammerhead 42. The upper end of the connecting rod 41 is connected with the lower end of the damper 3, and the lower end and the hammerhead 42 are connected by bolts. connected. Since the hammer head 42 of the pendulum structure 4 adopts a solid structure with a certain gravity and the hammer head 42 and the connecting rod 41 are movably connected, when the wire twists and swings, the hammer head 42 always maintains a vertical downward direction, which can change the overhead power transmission. The torsional damping parameters of the line can be used to achieve the effect of suppressing galloping of overhead transmission lines.

The anti-dancing device of the invention has simple structure, good anti-dancing performance, easy installation, can be matched with sub-wire spacers, has good economic performance, and is suitable for large-scale popularization and use.

Example 2

The structure and connection mode of the anti-dance device described in this example are basically the same as those in Embodiment 1, except that:

As shown in Figure 2, the damper 3 mainly includes an annular damping material 31, a metal shell 32 and a piston rod 33, the piston rod 33 passes through the central hole of the damping material 31 and its middle part is fixedly connected with the damping material 31, the piston The upper end of the rod 33 is connected to the two spring seats 21 of the spring structure 2 through a connecting rod 34 , the lower end of the piston rod 33 is connected to the pendulum structure 4 , and the damping material 31 can be fixed at any position inside the metal shell 32 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible Any modification or equivalent replacement made to the specific implementation of the present utility model without departing from the spirit and scope of the present utility model shall be covered by the claims of the present utility model.

Claims (6)

1. a single pendulum is hammered the damping anti-dance device into shape, it is characterized in that: this anti-dance device comprises yoke plate (1), damping vibration attenuation structure and pendulum structure (4), described yoke plate (1) is provided with and is used for the installing hole that is connected with conductor spacer, described damping vibration attenuation structure comprises spring structure (2) and damper (3), described spring structure (2) places between yoke plate (1) and the damper (3), the connecting rod (41) that described pendulum structure (4) comprises a tup (42) and is connected with tup, damper respectively.

2. single pendulum hammer damping anti-dance device as claimed in claim 1, it is characterized in that: described damper (3) comprises annular damping material (31), metal shell (32) and piston rod (33), described damping material (31) is located at metal shell (32) inside, and an end of described piston rod (33) is fixed in the centre bore of damping material (31), its other end is connected with spring structure (2) or pendulum structure (4).

3. single pendulum hammer damping anti-dance device as claimed in claim 1, it is characterized in that: described damper (3) comprises annular damping material (31), metal shell (32) and piston rod (33), described damping material (31) is located at metal shell (32) inside, centre bore and its two ends that described piston rod (33) passes damping material (31) are connected with pendulum structure (4) with spring structure (2) respectively, and the mid portion and the damping material of described piston rod (33) are affixed.

4. as the arbitrary described single pendulum hammer damping anti-dance device of claim 1-4, it is characterized in that: described spring structure (2) comprises spring base (21) and compression spring (22), be connected with one on the described spring base (21) and adjust bolt (5), described compression spring (22) is socketed on adjustment bolt (5) and goes up and place spring base (21), described adjustment bolt (5) upper end and yoke plate (1) Joint.

5. single pendulum hammer damping anti-dance device as claimed in claim 5, it is characterized in that: when the quantity of described spring structure (2) was 1, it was positioned at the center, upper end of damper (3).

6. single pendulum as claimed in claim 5 hammer damping anti-dance device is characterized in that: the quantity of described spring structure (2) is for greater than 1 positive integer the time, and it is positioned at the upper end of damper (3) and is symmetricly set on around the central longitudinal axis of damper.

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