CN104617536A - Power line wheel disk shock absorber - Google Patents

Abstract

The invention relates to a vibration damper for a power line roulette. The power line roulette vibration damper includes a central rod, and the central rod is fixedly installed on a pole tower; more than two spacer wheels are equidistantly fixed on the central rod; A groove-shaped oscillating disc coaxial with the central rod is sleeved on the outside of each limiting wheel, the diameter of the inner ring of the oscillating disc is larger than the diameter of the central rod, and the distance between the oscillating disc and the limiting wheel An annular cavity is formed between them, and the annular cavity is filled with elastic particles; the outer peripheral surface of the swing plate is provided with a winding groove; the vibration damper can effectively reduce the force of the cable on the tower, and at the same time, it can strengthen the tower Pull force on the cable.

Description

Powerline Roulette Dampers

technical field

The invention relates to a power line accessory, in particular to a vibration damper for a power line.

Background technique

At present, the more commonly used long-distance power transmission method is overhead line power transmission. From the transmission station to the destination, a tower is built at a certain distance, and finally the cable is supported in the air. This power transmission method is fast and simple to build; it lays the cable in the air , will not affect ground traffic; due to the heavy weight of the cable itself, the pulling force that the tower can bear is limited, so the distance between adjacent towers cannot be too far; because of this, the overhead line cannot achieve large-span, long-distance power transmission; In addition, the cable will shake for a long time when there is an external force. Since the cable is mostly erected at high altitude and the wind is strong at the high altitude, the cable is always in a swinging state; this swing is transmitted to the tower through the cable, because the tower is Rigid structure, under the action of the cable, the tower will vibrate slightly, and the micro vibration of the tower body will make the screws on the tower loose; long-term vibration will make the structure of the tower loose, posing a big safety hazard.

Contents of the invention

In view of the above problems, the present invention provides a vibration damper for a power line roulette, which can effectively reduce the force of the cable on the tower and at the same time strengthen the pulling force of the tower on the cable.

In order to solve the above problems, the technical solution adopted in the present invention is: the electric power line wheel disk vibration damper includes a central rod, and the central rod is fixedly installed on the pole tower; two or more limit positions are fixed equidistantly on the central rod wheel; each limit wheel is sheathed with a ring groove-shaped oscillating plate coaxial with the center rod, the inner ring diameter of the oscillating plate is larger than the diameter of the center rod, and the oscillating plate and the limit An annular cavity is formed between the wheels, and elastic particles are filled in the annular cavity; winding grooves are opened on the outer peripheral surface of the swinging disc.

The beneficial effect of the present invention is: one end of the cable is fixed on the pole tower, and the cable is wound on each of the swing disks along the winding groove and then fixed on the adjacent pole tower; when the cable swings under the action of external force such as strong wind , the oscillating disc will swing with the cable; since the oscillating disc is sleeved on the limiting wheel, the oscillating disc can only translate in a small range along the plane where the limiting wheel is located. At this time, the annular cavity between the oscillating disc and the limiting wheel Deformation will occur; during the translation process of the oscillating plate, the elastic particles sealed between the oscillating plate and the limit wheel will be squeezed and displaced, that is, the elastic particles will continue to flow and rub with the deformation of the above-mentioned annular cavity; at this time, the cable Part of the kinetic energy of the swing is converted into the internal energy of the elastic particles; due to the friction of the elastic particles, the swing of the swing plate will lag behind the swing of the cable, and the swing amplitude of the swing plate is smaller than that of the cable; swing under the action of the swing plate, but because the swing plate gradually reduces the swing kinetic energy of the cable, the swing amplitude, drive frequency, and swing direction of each swing plate are different; because the swing of each swing plate is relatively disordered and cancels each other, At the same time, the swing kinetic energy of the cable is converted into internal energy consumption by the elastic particles, so the vibration energy reaching the tower is greatly reduced, thereby effectively weakening the force of the cable on the tower.

Since the cable is wound on the oscillating disk, in addition to the pulling force of the tower on the end of the cable, the central rod can effectively share the pulling force of the tower; from the overall view, compared with the traditional structure, the cable in the present invention is The pole tower and the central pole are pulled and fixed at the same time, which effectively enhances the pulling force at the end of the cable and enables the cable to be laid with a larger span.

As a preference, there are 3-5 limit wheels; when the cable erection height is too high, the cable swing will be larger, and the swing kinetic energy of the cable can be effectively weakened by winding multiple limit wheels; The limit wheel can strengthen the end of the cable and prevent the cable from falling off the tower.

Preferably, the axis of the limiting wheel and the axis of the central rod are on the same horizontal plane, and the intersection angle between the two axes is 15-25°; this structure can reduce the degree of bending of the cable, thereby prolonging the service life of the cable.

Preferably, the elastic particles are rubber particles, foam particles, and silica gel particles with a diameter of 1-2 mm; in order to increase the fluidity and friction of the particles, thereby increasing the damping coefficient.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the power line wheel disk vibration damper.

Fig. 2 is a top view of the embodiment shown in Fig. 1 .

Fig. 3 is a schematic cross-sectional view of the embodiment shown in Fig. 1 cut along the radial direction of a wobble plate.

Fig. 4 is a schematic diagram of a circumferential section of the oscillating plate in the embodiment shown in Fig. 1 when no force is applied.

Fig. 5 is a schematic diagram of a circumferential section of the oscillating plate in the embodiment shown in Fig. 1 when a force is applied.

Detailed ways

Example

In the embodiment shown in Figures 1 to 5, the power line wheel disc vibration damper mainly includes a central rod 1; the central rod 1 is fixedly installed on the pole tower 6; Limiting wheel 2, the axis of each said limiting wheel 2 is on the same horizontal plane as the axis of said center rod 1 and the angle of intersection between the two axes is 15-25°; The central rod 1 is coaxial with a ring groove-shaped oscillating disk 3, the inner ring diameter d of the oscillating disk 3 is larger than the diameter of the central rod 1, and an annular cavity is formed between the oscillating disk 3 and the limit wheel 2, The annular cavity is filled with elastic particles, and the elastic particles are one of rubber particles, foam particles, and silica gel particles with a diameter of 1-2 mm; the outer peripheral surface of the swing plate 3 is provided with a winding groove 31.

One end of the cable 4 is fixed on the pole tower 6, and the cable 4 is wound on each of the swing discs 3 along the winding groove 31 and then fixed on the adjacent pole tower 6; when the cable 4 swings under the action of external force such as strong wind , the oscillating disk 3 will swing with the cable 4; since the oscillating disk 3 is set on the limiting wheel 2, the oscillating disk 3 can only translate in a small range along the plane where the limiting wheel 2 is located. At this time, the oscillating disk 3 and the limiting wheel The annular cavity between the 2 will be deformed; during the translation process of the oscillating disk 3, the elastic particles 5 sealed between the oscillating disk 3 and the limiting wheel 2 will be squeezed and displaced, that is, the elastic particles 5 will move with the above-mentioned space. The deformation of the cavity continues to flow and rub; at this time, the kinetic energy of the swing of the cable 4 is partially transformed into the internal energy of the elastic particles; due to the friction of the elastic particles 5, the swing of the swing plate 3 will lag behind the swing of the cable 4, while the swing plate 3 The swing amplitude is less than the swing amplitude of the cable 4; each of the swing plates 3 swings under the action of the cable 4, but because the swing plate 3 gradually reduces the swing kinetic energy of the cable 4, the swing amplitude and driving frequency of each of the swing plates 3 , swing directions are all different; because the swing of each swing plate 3 is relatively disordered and cancels each other out, and the swing kinetic energy of the cable 4 is converted into internal energy consumption by the elastic particles 5 at the same time, so the vibration energy reaching the tower 6 is greatly reduced , thereby effectively weakening the force of the cable 4 on the tower 6 .

Since the cable 4 is wound on the oscillating disk 3, in addition to the pulling force of the pole tower 6 on the end of the cable 4, the central pole 1 can effectively share the pulling force of the pole tower 6; from the overall perspective, compared with the traditional structure, The cable 4 in the present invention is simultaneously pulled and fixed by the pole tower 6 and the center pole 1, which effectively enhances the pulling force at the end of the cable 4, so that the cable 4 can be laid in a larger span; The axis of the center pole 1 is on the same horizontal plane and the intersection angle of the two axes is 15-25°; when the cable 4 is wound on the oscillating disk 3, the angle between the cable 4 and the oscillating disk 3 is less than 90 degrees, the The angle range can effectively prevent the cable 4 from being excessively bent, thereby prolonging the service life of the cable 4 .

When the erection height of the cable 4 is too high, the swing range of the cable 4 will be large, and the swing kinetic energy of the cable 4 can be effectively weakened by winding a plurality of limit wheels 2; in addition, the end of the cable 4 can be strengthened by winding a plurality of limit wheels 2 part, to prevent the cable 4 from falling off from the tower 6; 3 limit wheels 2 are installed in this embodiment, and this number can meet the erection requirements of the commonly used cables 4, and at the same time, the central rod 1 will not protrude too long from the tower 6 , will not increase the burden on the pole tower 6; in addition, due to the small size of the elastic particles 5, when the oscillating plate 3 swings, the elastic particles 5 can flow quickly and fully friction, quickly convert kinetic energy into internal energy, and then quickly convert the vibration reduce.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (4)

1. A power line roulette vibration damper, the power line roulette vibration damper includes a center rod (1), and the center rod (1) is fixedly installed on the pole tower (6); it is characterized in that: the center rod ( 1) More than two spacer wheels (2) are equidistantly fixed on the top; each spacer wheel (2) is provided with a circular groove-shaped oscillating plate coaxial with the center rod (1) (3), the diameter of the inner ring of the oscillating disk (3) is larger than the diameter of the central rod (1), and an annular cavity is formed between the oscillating disk (3) and the limit wheel (2), and the annular cavity The cavity is filled with elastic particles; a winding groove (31) is opened on the outer peripheral surface of the oscillating disk (3). 2. The power line roulette vibration damper according to claim 1, characterized in that there are 3-5 said limiting wheels (2). 3. The power line roulette damper according to claim 1 or 2, characterized in that: the axis of the limiting wheel (2) and the axis of the central rod (1) are on the same horizontal plane and the intersection angle of the two axes is 15-25°. 4. The power line roulette vibration damper according to claim 3, characterized in that: the elastic particles (5) are one of rubber particles, foam particles or silica gel particles with a diameter of 1-2 mm.