CN106877264A - An anti-galling collision energy consumption vibration reduction device - Google Patents

Abstract

The invention discloses a kind of Anti-galloping energy by collision vibration absorber, it solves the problems, such as to carry out the DeGrain of vibration damping on power transmission line in the prior art by installation interval rod, with good durability, reliability and flexible arrangement, effective Anti-galloping effect can be realized；Its technical scheme is：Including clamping part, elastic portion and outer container, described clamping part is located at the two ends of outer container, for clamping the conductor spacer on transmission line of electricity；Described elastic portion is provided with symmetrical dividing plate through the hole quality of connection ball on outer container in the both sides of mass ball, and passive energy dissipation is realized by the collision of mass ball and dividing plate.

Description

An anti-galling collision energy consumption vibration reduction device

technical field

The invention relates to the field of vibration reduction of power transmission lines, in particular to an anti-galling collision energy consumption vibration reduction device.

Background technique

As a basic engineering facility that maintains the functions of modern cities and regional economies, the safety of the power system directly affects the production and construction of the country and the living order of the people. The galloping phenomenon of transmission lines is an important factor affecting the safe operation of power systems, and it is a complex fluid-solid coupling vibration. Galloping will not only cause the tripping of transmission lines, but also bring some irreversible damage to the power grid equipment, which seriously threatens the safe operation of the power grid.

With the continuous development of my country's electric power industry and the continuous improvement of power levels, transmission lines show a trend of larger conductor cross-sections and more split numbers. requirements. Therefore, it is of great significance to solve the problem of anti-dancing and vibration reduction of transmission lines and ensure the safety of lines.

At present, the anti-galling measures of transmission lines are mainly to install spacers at a certain distance on the transmission line to limit the relative movement between the split conductors, maintain the geometric shape of the split conductors, and play a certain role in inhibiting the oscillation and breeze vibration of the transmission line. The damping effect is limited. Under the action of wind load, each layer of transmission lines suffers from different inertial forces and the vibration response is inconsistent, so this measure cannot consider the influence of lines between layers.

To sum up, in the prior art, there is still no effective solution to the problem of how to prevent the galloping of the transmission line and achieve an obvious vibration reduction effect.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides an anti-galling collision energy consumption and vibration reduction device for the galloping phenomenon under the wind load of the transmission line, which has good durability, reliability and layout flexibility, and can effectively Solve the galloping problem of transmission lines.

The present invention adopts following technical scheme:

An anti-galling collision energy consumption and vibration damping device, including a clamping part, an elastic part and an outer box, the clamping part is arranged at both ends of the outer box, and is used to clamp spacers on the power transmission line; the described The elastic part is connected to the mass ball through the hole on the outer box, and symmetrically distributed partitions are arranged on both sides of the mass ball, and energy consumption and vibration reduction are realized through the collision between the mass ball and the partition.

Further, the clamping part includes two snap rings that are symmetrical about the center, the snap rings are connected by bolts, and insulating rubber is provided in the inner space formed by the two snap rings.

Further, the insulating rubber is damping rubber, which can buffer the vibration of the transmission line spacer and absorb energy.

Further, the elastic part includes a rigid circular tube, a baffle and a memory alloy spring connected in sequence. The memory alloy spring has a strong self-resetting ability, and the expansion and contraction of the memory alloy spring provides an efficient damping force, which can play an energy-dissipating role , and can be restored to its original shape after deformation, achieving a good vibration reduction effect.

Further, according to the natural frequency of the tower wire, the stiffness, length and mass ball of the memory alloy spring are selected, so that the vibration frequency of the spring ball is basically consistent with the natural frequency of the wire to achieve resonance, forming a vibration similar to that of the transmission line. Inertial force and damping force in opposite directions, so as to achieve effective anti-galling effect.

Further, the rigid circular tube is fixed by a snap ring.

Further, the outer box is separated by several partitions, and several mass balls are arranged inside, and adjacent mass balls are connected by memory alloy springs.

Further, the partition is provided with a through hole, the memory alloy spring passes through the through hole on the partition, the diameter of the through hole is smaller than the diameter of the mass ball, so that the mass ball can collide with the partition, and the partition The plate plays a certain role of limiting the mass ball.

Further, the outer surface of the mass ball is pasted with a viscoelastic material, which can absorb energy when the mass ball collides with the partition, thereby achieving the effect of energy consumption.

Further, the outer box is made of fiber-reinforced composite material, which is light but hard, insulated, high in mechanical strength, and corrosion-resistant, and can reduce the burden on power transmission lines.

Further, the separator is a metal plate.

Compared with prior art, the beneficial effect of the present invention is:

(1) The mass ball of the present invention can swing and collide in any direction in space, and the viscoelastic material can absorb energy when colliding, so as to effectively reduce vibration and consume energy in multiple directions, without requiring external energy input, and has a simple structure;

(2) The mass ball of the present invention is connected with the memory alloy spring, which can provide high-efficiency damping force, play the role of energy consumption, reduce the vibration of the transmission line, and the memory alloy spring can be restored to its original state after being stretched and compressed, which plays a very important role. good damping effect;

(3) The present invention can realize the vibration reduction of different layers of transmission lines through the collision of the internal mass ball and the expansion and contraction of the memory alloy spring under the action of dynamic load, and at the same time improve the lateral stiffness of the transmission line, improve the integrity of the transmission line, reduce the Galloping of transmission lines;

(4) The present invention is reasonable in design, light in weight, simple in principle, low in cost, simple in installation, and has good economic benefits and application prospects.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is A-A sectional view of the present invention;

Fig. 3 is B-B sectional view of the present invention;

Fig. 4 is C-C sectional view of the present invention;

Fig. 5 is the installation schematic diagram of the present invention;

Among them, 1-insulating rubber, 2-clip ring, 3-outer box, 4-baffle plate, 5-memory alloy spring, 6-partition plate, 7-viscoelastic material, 8-mass ball, 9-rigid round tube.

detailed description

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

As introduced in the background technology, in the prior art, there is an inconspicuous effect of installing spacer rods on the transmission line to reduce vibration. In order to solve the above technical problems, this application proposes an anti-galling collision energy reduction vibration device.

In a typical implementation of the present application, as shown in Figures 1-4, an anti-galling collision energy consumption and vibration reduction device is provided, which is installed on the power transmission line and includes a clamping part, an elastic part and an outer box 3 , there are two clamping parts, which are respectively arranged on the upper and lower ends of the outer box 3, and are used to clamp the spacer rods on the power transmission line; the elastic part passes through the hole on the outer box 3 to connect the mass ball 8. There are symmetrically distributed partitions 6 on both sides of the mass ball 8, and energy consumption and vibration reduction are realized through the collision between the mass ball 8 and the partitions 6.

The above-mentioned clamping part includes two snap rings 2 that are symmetrical about the center. The two snap rings 2 form a mouth-shaped structure. The upper and lower ends of the snap ring 2 are respectively connected by bolts. There is insulating rubber 1 having the same shape as the snap ring.

As shown in Figure 4, the two clamping parts respectively clamp the spacer bars on the power transmission lines arranged in parallel. When clamping the spacer bars, the two snap rings 2 are respectively arranged on both sides of the spacer bars, and then screw Fix two snap rings 2 and get final product.

The above-mentioned insulating rubber 1 is a damping rubber, which can buffer the vibration of the transmission line spacer and absorb energy.

The above-mentioned elastic part comprises a rigid circular tube 9, a baffle plate 4 and a memory alloy spring 5, the rigid circular tube 9 is vertically arranged, one end thereof is fixed by a snap ring 2, and the other end is connected to the top of the baffle plate 4, the The lower part of the baffle plate 4 is connected to one end of the memory alloy spring 5, and the other end of the memory alloy spring 5 is connected to the mass ball 8.

The above-mentioned memory alloy spring 5 has strong self-resetting ability. The expansion and contraction of the memory alloy spring 5 provides an efficient damping force, which can play a role in energy consumption, and can return to its original shape after deformation, achieving a good vibration reduction effect.

According to the natural frequency of the power transmission line, the stiffness, length and mass ball 8 of the memory alloy spring 5 are selected, so that the vibration frequency of the mass ball 8 is basically consistent with the natural frequency of the power transmission line to achieve resonance, forming a vibration direction opposite to the power transmission line Inertial force, so as to achieve effective anti-galling effect.

The above-mentioned outer box 3 is divided into five parts by four partitions 6, and two mass balls 8 are arranged inside the outer box 5, and the two mass balls 8 are respectively fixed by clamping parts arranged at the upper and lower ends of the outer box 3; A partition 6 is arranged on both sides of the upper and lower sides of each mass ball 8, and a certain distance is formed between the partition 6 and the mass ball 8 to form a collision space, which can realize multi-directional collisions of the mass ball 8; Connected by memory alloy spring 5.

The above-mentioned four partitions 6 are metal plates, and the partitions 6 are provided with through holes, and the memory alloy spring 5 passes through the through holes on the partitions 6, and the diameter of the through holes is smaller than the diameter of the mass ball 8 , so that the mass ball 8 can collide with the partition plate 6, and the partition plate 6 plays a role of limiting the mass ball 8 to a certain extent.

The viscoelastic material 7 is pasted on the outer surface of the above-mentioned mass ball 8, which can absorb energy when the mass ball 8 collides with the separator 6, thereby achieving the effect of energy consumption.

The above-mentioned baffle plate 4 and partition plate 6 are rectangular, and the outer box 3 is a cubic structure. The outer box 3 is made of FRP material, which is light and hard, insulated, high in mechanical strength, and corrosion-resistant, which can reduce the burden on the transmission line .

In order to achieve the ideal vibration reduction effect of the energy dissipation vibration reduction device of this application, the following aspects need to be paid attention to:

First, according to the natural vibration frequency of the transmission line, the quality of the mass ball 8 and the length and stiffness of the memory alloy spring 5 are reasonably selected to ensure that the vibration frequency of the mass ball 8 is basically consistent with the natural vibration frequency of the transmission line to form resonance;

Second, the diameter of the through hole on the partition 6 is slightly smaller than the diameter of the mass ball 8, which can limit the mass ball 8. At the same time, the partition 6 should be smoothed so as not to block the memory alloy spring 5;

Third, all metal materials used in this device need to be insulated to ensure the safety of the transmission line;

Fourth, the mass ball 8 needs to be pasted with a viscoelastic material 7, which can absorb energy during the collision process of the mass ball 8 to achieve the purpose of vibration reduction;

The 5th, the upper and lower end perforation of outer case 3 should not be too big, can guarantee that vertical rigid circular tube 9 passes through.

In another embodiment of the present application, the outer box 3 is a cylindrical structure, and the cross-sections of the internal baffles 4 and partitions 6 are circular.

In yet another embodiment of the present application, three or more mass balls 8 are arranged in the outer box 3, and partitions 6 are arranged on the upper and lower sides of each mass ball 8, and the quantity of mass balls 8 depends on the distance between the transmission lines depends on the distance between them.

In yet another embodiment of the present application, the snap ring 2 is arc-shaped, and a circular or elliptical space is formed between the two snap rings 2, and the shape of the snap ring 2 is arranged in the circular or elliptical space. The same insulating rubber 1.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. a kind of Anti-galloping energy by collision vibration absorber, it is characterised in that including clamping part, elastic portion and outer container, described folder Portion is held located at the two ends of outer container, for clamping the conductor spacer on transmission line of electricity；Described elastic portion is connected through the hole on outer container Mass ball, symmetrical dividing plate is provided with the both sides of mass ball, and passive energy dissipation is realized by the collision of mass ball and dividing plate.

2. a kind of Anti-galloping energy by collision vibration absorber according to claim 1, it is characterised in that described clamping part bag Two are included on centrosymmetric snap ring, described snap ring is bolted, set in the inner space that two snap rings are formed There is electro-insulating rubber.

3. a kind of Anti-galloping energy by collision vibration absorber according to claim 2, it is characterised in that described electro-insulating rubber It is damping rubber.

4. a kind of Anti-galloping energy by collision vibration absorber according to claim 1, it is characterised in that described elastic portion bag Include rigid circular pipe, baffle plate and the memory alloy spring being sequentially connected.

5. a kind of Anti-galloping energy by collision vibration absorber according to claim 2 or 4, it is characterised in that described rigidity Pipe is fixed by snap ring.

6. a kind of Anti-galloping energy by collision vibration absorber according to claim 1, it is characterised in that described outer container passes through Some dividing plates are separated, and are internally provided with some mass balls, are connected by memory alloy spring between adjacent masses ball.

7. a kind of Anti-galloping energy by collision vibration absorber according to claim 6, it is characterised in that set on described dividing plate There is through hole, through the through hole on dividing plate, through-hole diameter is less than the diameter of mass ball to described memory alloy spring.

8. a kind of Anti-galloping energy by collision vibration absorber according to claim 1, it is characterised in that described mass ball Paste viscous-elastic material in outer surface.

9. a kind of Anti-galloping energy by collision vibration absorber according to claim 1, it is characterised in that described outer container is by fibre Dimension enhancing composite is made.

10. a kind of Anti-galloping energy by collision vibration absorber according to claim 1, it is characterised in that described dividing plate is Metallic plate.