WO2013159647A1

WO2013159647A1 - Five-rod lead-waving resistant power vibration absorber for transmission lines

Info

Publication number: WO2013159647A1
Application number: PCT/CN2013/074032
Authority: WO
Inventors: 朱宽军; 杨加伦; 刘彬; 牛海军
Original assignee: 国家电网公司; 中国电力科学研究院
Priority date: 2012-04-24
Filing date: 2013-04-10
Publication date: 2013-10-31
Also published as: CN102684124B; CN102684124A

Abstract

A five-rod lead-waving resistant power vibration absorber for transmission lines. The vibration absorber comprises wire clamps, a spacer body, and heavy weights. A front piece and a rear piece are fixedly connected to form the spacer body, and the wire clamps are installed on four corners thereof; the wire clamps and the spacer body are assembled to form a spacer; and spring mass damping systems are symmetrically disposed on a frame of a lower end of the spacer body, the spring mass damping system comprises a connecting rod, a spring cylinder, and the heavy weight, one end of the spring cylinder is connected to the heavy weight, the other end is connected to the connecting rod, and the two connecting rods are connected. The spring mass damping systems reduce the complexity degree of the lead-waving resistant power vibration absorber, the structure is simple, and installation is convenient; the two heavy weights can rotate around hinged shafts in the same direction or in opposite directions, and rotating directions of the two are flexible and are determined in accordance with specific conditions of lead waving, so as to provide a solution of preventing leads from waving for the lead-waving resistant field for transmission lines.

Description

Five-bar anti-wire dancing dynamic vibration damper for transmission line

The invention belongs to the field of overhead transmission lines, and in particular relates to a five-bar anti-wire dancing power damper for transmission lines. Background technique

With the rapid development of China's economy, the demand for electricity has continued to grow rapidly. In order to protect national energy security and economic security, ultra-high voltage and ultra-high voltage power grids with significant social and economic benefits have become an inevitable choice for China. However, due to the need for split conductors for UHV and UHV grids, transmission lines are more prone to galloping. The harm caused by dancing is multi-faceted. Light flashing and tripping occur, damage to the fittings and insulators is caused by heavy ones, broken wires, broken wires, loose bolts of the tower bolts, falling off, and even inverted towers, resulting in major power grid accidents. It is necessary to take measures against wire dancing. The use of heavy hammers on frame plates with spacers is one of the common anti-dance measures. It is matched with two kinds of dampers, the Canadian-style detuning pendulum and the Japanese-style twist-twisting anti-dance device. They can only eliminate the vibration in one direction, and the detuning pendulum is a fixed pendulum. There is no vibration-damping spring, the common vibration-absorbing effect is not good, and the vibration in the vertical direction cannot be fundamentally eliminated. However, although the anti-torsion spring is provided, the anti-torsion spring can only suppress the twist and cannot suppress. The vertical direction of the wire dances. In actual use, the wire not only has vertical vibration, but also has a large twisting tendency, which must be overcome at the same time to achieve the desired effect.

The utility model of the application No. 200520074058. 7 discloses an anti-wire dancing dynamic damper for a transmission line with a spring mass vibration absorbing system, which comprises a wire clamp, a weight and a spacer body, and the spacer body is composed of two blocks. Connected to each other, the wire clamp is installed on the four corners of the spacer body, and a vertical spring tube and a lateral spring tube are installed between the two spacer rod bodies, and the lower end of the vertical spring tube is hingedly mounted under the spacer body On the hinge shaft on the frame, and extending the lower frame to be connected with the weight, the transverse spring tube is symmetrically arranged on the two side frames of the spacer body, and the opposite end thereof is hinged with the vertical spring tube, the utility model solves the output The vertical and reverse directions of the line are double dancing, but at least 3 sets of spring tubes are required, resulting in a complicated system structure and difficult installation. Summary of the invention

In order to overcome the above deficiencies of the prior art, the present invention provides a five-bar anti-wire galloping dynamic damper for a transmission line. The spring mass vibration absorbing system reduces the complexity of the anti-dancing dynamic shock absorber, and has a simple structure and convenient installation; The two weights can rotate in the same direction around the hinge shaft, or they can rotate in opposite directions. The direction of rotation of the two hammers is relatively flexible, which is determined by the specific conditions of the wire dancing; effectively preventing the dancing of the wires for the transmission line, and preventing the dancing field for the transmission line. It provides a solution to prevent wire galloping and has broad application prospects.

In order to achieve the above object, the present invention adopts the following technical solutions:

A five-bar anti-wire galloping dynamic damper for a transmission line, the damper comprises a wire clamp 1, a spacer body 2 and a weight 7. The spacer body 2 is fixed by two front and rear blocks, and four The clip 1 is mounted on each corner, and the clip 1 and the spacer body 2 constitute a spacer.

a spring mass damper system is symmetrically disposed on a lower end frame of the spacer body 2, the spring mass damper system including a connecting rod 4, a spring tube 3 and the weight 7, the spring tube 3 end connection The weight 7 is connected to the connecting rod 4 at the other end, and the two connecting rods 4 are connected.

The spring cylinder 3 includes a spring 8 and a cylinder 9, and the spring cylinder 3 is connected to the connecting rod 4 by the spring.

The spring cylinder 3 is connected by a hinge shaft 10 whose distance of rotation about the hinge shaft 10 depends on the position limiting device 6.

The limiting device 6 is a limiting pin, a limiting boss or a limiting cover.

The two connecting rods 4 are connected by the hinge shaft 5, and the angle between the two connecting rods 4 is 35° to 90°. The plane in which the spring cylinder 3 and the connecting rod 4 are located is parallel to the plane in which the spacer body 2 is located, and the two spring cylinders 3, the two connecting rods 4 and the spacer body 2 constitute a planar five-bar mechanism.

The two weights 7 can rotate in the same direction or in opposite directions around the hinge shaft 5;

Compared with the prior art, the utility model has the beneficial effects that: the spring mass vibration absorbing system reduces the complexity of the anti-dancing dynamic shock absorber, has a simple structure and is convenient to install; the two weights can rotate in the same direction around the hinge shaft. It can also be rotated in the opposite direction, and the direction of rotation of the two is relatively flexible, which is determined by the specific conditions of the wire dancing. It provides a solution for preventing wire dancing in the field of wire anti-dance for transmission lines, and has broad application prospects. DRAWINGS

1 is a schematic structural view of a specific embodiment of the present invention;

Figure 2 is a schematic view showing the connection of the connecting rod, the spring tube and the weight;

Among them: 1. Clamp, 2. Spacer body, 3. Spring tube, 4. Connecting rod, 5. Hinge shaft, 6. Limiting device, 7. Heavy hammer, 8. Spring, 9. Cylinder, 10. Hinge shaft. detailed description

The invention will be further described in detail below with reference to the accompanying drawings. As shown in FIG. 1 , a five-bar anti-wire galloping dynamic damper for a transmission line, the damper includes a wire clamp 1, a spacer body 2 and a weight 7. The spacer body 2 is fixed by two front and rear blocks. Further, the wire clamp 1 is mounted on the four corners thereof, and the wire clamp 1 and the spacer body 2 constitute a spacer. The spring mass damper system is symmetrically disposed on the lower end frame of the spacer body 2, the spring mass damper system includes a connecting rod 4, a spring tube 3 and the weight 7, the spring tube 3 end connection The weight 7 is connected to the connecting rod 4 at the other end, and the two connecting rods 4 are connected.

The spring barrel 3 is connected by a hinge shaft 10, and the distance it rotates about the hinge shaft 10 depends on the stopper device 6, and the two weights cannot collide with the left and right frames of the spacer body 2. At the same time, the stopper 6 is such that the hinge shaft 5 connecting the two connecting rods 4 is always located in the hollow of the spacer body 2 and does not collide with the spacer body 2.

The limiting device 6 is a limiting pin, a limiting boss or a limiting cover.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be The invention is to be construed as being limited to the scope of the appended claims.

Claims

Rights request

A five-bar anti-wire galloping dynamic damper for a transmission line, the damper comprising a clamp (1), a spacer body (2) and a weight (7), the spacer body (2) The wire clamp (1) is mounted on the four corners of the front and the rear, and the wire clamp (1) and the spacer body (2) constitute a spacer; the feature is: spring mass vibration damping The system is symmetrically disposed on a lower end frame of the spacer body (2), and the spring mass vibration damper system includes a connecting rod (4), a spring barrel (3) and the weight (7), the spring tube ( 3) The end is connected to the weight (7), and the other end is connected to the connecting rod (4), and the two connecting rods (4) are connected.

2. The five-bar anti-wire galloping dynamic damper for a power transmission line according to claim 1, wherein: the spring cylinder (3) comprises a spring (8) and a cylinder (9), the spring cylinder (3) Connected to the connecting rod (4) by the spring.

3. The five-bar anti-wire galloping dynamic damper for a power transmission line according to claim 2, wherein: the spring cylinder (3) is connected by a hinge shaft (10), and rotates around the hinge shaft (10) The distance depends on the limit device.

4. The five-bar anti-wire galloping dynamic damper for a power transmission line according to claim 3, wherein: the limiting device is a limiting pin, a limiting boss or a limiting cover.

The five-bar anti-wire galloping dynamic damper for a power transmission line according to claim 1, wherein the two connecting rods (4) are connected by the hinge shaft (5).

The five-bar anti-wire galloping dynamic damper for a power transmission line according to claim 5, wherein the two connecting rods (4) have an angle of 35° to 90°.

7. The five-bar anti-wire galloping dynamic damper for a power transmission line according to claim 1, wherein: a plane in which the spring cylinder (3) and the connecting rod (4) are located and the spacer body ( 2) The planes in which they are located are parallel.

The five-bar anti-wire galloping dynamic damper for a power transmission line according to claim 1, wherein: the two spring cylinders (3), the two connecting rods (4) and the spacer body (2) Form a plane five-bar mechanism.

9. The five-bar anti-wire galloping dynamic damper for a power transmission line according to claim 1, wherein: the two weights (7) are rotatable in the same direction around the hinge shaft (5) Can rotate in opposite directions.