CN203983919U - A kind of compound stockbridge damper - Google Patents

Abstract

The utility model discloses a composite anti-vibration hammer, which comprises a supporting plate (5) and a steel strand (2). Springs (4) are respectively arranged on both sides of the supporting plate (5). The connector (6) is arranged on the steel strand (2), the two ends of the steel strand (2) are provided with a hammer head (1), and the middle part of the steel strand (2) is upwardly provided with a hook for hanging on the wire (3), the middle part of the steel strand (2) is provided with a permanent magnet (9) downward, and the middle part of the supporting plate (5) is provided with a coil (7) cooperating with the permanent magnet (9). The combination of the steel strand and the hammer head of the utility model and the combination of the permanent magnet, the coil and the spring together have the effect of absorbing vibration energy, forming a composite anti-vibration, enhancing the anti-vibration and damping capabilities, and also adopting the steel strand structure The curved structure can absorb more vibration waves in the frequency range, and the electromagnetic vibration damping device is added to increase the vibration reduction effect, which can effectively protect the transmission line from damage.

Description

A composite anti-vibration hammer

technical field

The utility model relates to an anti-vibration hammer, in particular to a composite anti-vibration hammer with strong vibration damping capability.

Background technique

Breeze vibration of overhead transmission lines is a phenomenon of mechanical vibration of wires caused by wind excitation, and it is a small amplitude vibration. The wind speed that causes the breeze vibration of the wire is not large, usually in the range of 0.5-10m/s. The vibration lasts for a long time, usually several hours, sometimes up to several days. The double amplitude of vibration is generally not greater than 2-3 times the diameter of the wire, and the vibration frequency is about 3-120Hz. Due to the damping effect of the wire, the vibration frequency range that threatens the wire is generally 3-80Hz, which is the key to anti-vibration work. Key guard bands. Anti-vibration hammer is a main anti-vibration component of overhead transmission line, and its performance directly affects the operation safety of the line. The mathematical model of the anti-vibration hammer must be established from the spring, damping, mass and moment of inertia system composed of the steel strand of the anti-vibration hammer and the hammer head, and based on this, the natural frequency and power characteristics of the anti-vibration hammer are analyzed. Mechanical properties such as force-frequency characteristics and phase characteristics. These properties are closely related to the quality of the anti-vibration hammer hammer head, the moment of inertia, the stiffness and length of the steel strand. The vibration suppression principle of the anti-vibration hammer is to absorb the vibration mechanical energy of the wire and release it in the form of heat and sound energy.

With the construction of my country's UHV power grid, more and more line designers have realized that it is urgent to carry out more in-depth research on the anti-vibration measures of transmission lines, and there is still a lot of work to be done in the aspect of wind-induced vibration of transmission lines. The traditional anti-vibration hammer is generally composed of two cast iron hammer heads, a steel strand and a splint plate. The anti-vibration and vibration-absorbing capabilities are poor, and sometimes the amplitude of the vibration caused by the wind is too large. This design cannot meet people's needs. need.

Utility model content

The purpose of the utility model is to provide a composite anti-vibration hammer. The utility model can enhance the ability of anti-vibration and vibration reduction.

The technical scheme of the utility model: a composite anti-vibration hammer, characterized in that: it includes a supporting plate and a steel strand, springs are respectively arranged on both sides of the supporting plate, and two springs are arranged on the steel strand through a spring connector. The two ends of the steel strand are provided with hammer heads, the middle part of the steel strand is provided with a hook for hanging on the wire, the middle part of the steel strand is provided with a permanent magnet downward, and the middle part of the supporting plate is provided with a hook for matching with the permanent magnet. coil.

In the aforementioned composite anti-vibration hammer, the supporting plate is also provided with a coil cover, and a coil is installed on the coil cover.

In the aforementioned composite anti-vibration hammer, the steel strand is a steel strand with a radius of curvature.

Compared with the prior art, the combination of the steel strand and the hammer head of the utility model and the combination of the permanent magnet, the coil and the spring together have the effect of absorbing vibration energy, forming a composite anti-vibration, enhancing the ability of anti-vibration and vibration reduction, and also A curved structure (with a radius of curvature) is adopted on the steel strand structure, which can absorb more vibration waves in the frequency range, and an electromagnetic vibration damping device is added to increase the vibration reduction effect, which can effectively protect the transmission line from damage destroy.

Description of drawings

Fig. 1 is a structural representation of the utility model.

The marks in the attached drawings are: 1-including hammer head, 2-steel strand, 3-hook, 4-spring, 5-pallet, 6-spring linker, 7-coil, 8-coil sleeve, 9-permanent magnet.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments, but it is not used as a basis for limiting the utility model.

Example. A composite anti-vibration hammer, as shown in Figure 1, including a supporting plate 5 and a steel strand 2, springs 4 are arranged on both sides of the supporting plate 5, and two springs 4 are arranged on the steel strand 2 through a spring connector 6 Above, the two ends of the steel strand 2 are provided with a hammer head 1, the middle part of the steel strand 2 is provided with a hook 3 for hanging on an electric wire upward, and the middle part of the steel strand 2 is provided with a permanent magnet 9 downward. A coil 7 cooperating with a permanent magnet 9 is provided in the middle of the plate 5 .

The supporting plate 5 is also provided with a coil cover 8 on which the coil 7 is installed.

The steel strand 2 is a steel strand with a curvature radius (equivalent to a curved structure), and the curvature radius can be adjusted during the design process according to the vibration reduction requirements.

The steel strand 2 and the hammer head 1 can absorb vibration energy when the overhead transmission line vibrates.

The permanent magnet 9 and the coil 7 can absorb vibration energy when the spring 4 vibrates.

The working principle of the utility model is as follows: two springs are hung on the steel strand by a spring linker, and a supporting plate is hung on the lower end of the spring. The coil cover is arranged on the supporting plate, and the coil is prevented in the coil cover; the permanent magnet is installed on the steel strand, and the steel strand can be hung on the wire through a hook; the steel strand and the hammer When the overhead transmission line vibrates, it can absorb the vibration energy; when the spring vibrates, the permanent magnet and the coil can absorb the vibration energy.

Claims (3)

1. A compound anti-vibration hammer is characterized in that: comprise supporting plate (5) and steel strand (2), supporting plate (5) both sides are respectively provided with spring (4), two springs (4) pass spring The connector (6) is arranged on the steel strand (2), the two ends of the steel strand (2) are provided with a hammer head (1), and the middle part of the steel strand (2) is upwardly provided with a hook for hanging on the wire (3), the middle part of the steel strand (2) is provided with a permanent magnet (9) downward, and the middle part of the supporting plate (5) is provided with a coil (7) cooperating with the permanent magnet (9). 2. The composite anti-vibration hammer according to claim 1, characterized in that: the supporting plate (5) is also provided with a coil cover (8), and the coil (7) is installed on the coil cover (8). 3. The composite anti-vibration hammer according to claim 1 or 2, characterized in that: the steel strand (2) is a steel strand with a radius of curvature.