CN218405020U - Collision type vibration damper for bridge inhaul cable - Google Patents

Abstract

The utility model discloses a collision type damping hammer of bridge cable relates to cable damping technical field, installs on cable body (5), include: the cable comprises a clamping piece (1), wherein one end of the clamping piece (1) is fixedly connected with a cable body (5); the cantilever rod (2), the said cantilever rod (2) is fixedly connected with another end of the said grip member (1); the mass block (3) is arranged at the end head of the cantilever rod (2); the blocking piece (4) is fixedly connected with the cable body (5), and the blocking piece (4) is a viscoelastic material body and used for blocking the mass block (3) from impacting the cable body (5). The device provided by the utility model can improve the damping effect, can also avoid the damping hammer to bump with the bridge cable when the vibration, cause the cable damage.

Description

Collision type vibration damper for bridge inhaul cable

Technical Field

The utility model relates to a cable damping technical field especially relates to a collision type damper of bridge cable.

Background

The damping hammer is mainly used for energy dissipation and vibration reduction of the transmission line at present, when the transmission line vibrates and swings, the damping hammer can convert mechanical energy generated when the transmission line vibrates into friction heat energy of a cantilever rod of the damping hammer to be consumed, so that the vibration amplitude of the transmission line is reduced, and fatigue strand breakage, line breakage and abrasion of a pole and tower hardware fitting of the overhead transmission line are prevented. With the development of times, the vibration reduction technology of the vibration reduction hammer is gradually popularized and applied to bridge cable systems. Indeed, although the vibration damping hammer is used to solve the vibration problem of the flexible structure, the specifications and structures of the bridge cable are different from those of the power transmission line, so that the dynamic characteristics of the bridge are greatly different from those of the power transmission line, and the specific targets of vibration suppression are different. The traditional vibration damper mainly drives the cantilever rod to bend and deform through the movement of the hammer head, so that the cantilever rod generates friction energy consumption. Conventional damper hammers are typically used to control the vibration of shorter cables or slings, and are designed for cable vortex-induced vibrations with higher frequencies. The damping hammer cantilever rod needs short length and high rigidity, and the amplitude of the damping hammer head excited by structural vibration is small. For cables with large lengths, low-frequency vibration such as wind and rain vibration and low-order vortex vibration is often required to be controlled. In order to meet the vibration reduction requirement, the mass of the vibration reduction hammer needs to be increased; in order to tune the low-order frequency of the stay cable, the length of the cantilever bar needs to be increased; to achieve optimal control, the damping of the damper hammer needs to be increased. In addition, the low frequency vibration amplitude of long cables is usually large, and the optimized vibration damper needs a long cantilever rod. Therefore, after the vibration reduction hammer is excited, the hammer head is easy to collide with the inhaul cable, the inhaul cable sleeve is easy to damage, and the service life of the inhaul cable is influenced by long-term action.

SUMMERY OF THE UTILITY MODEL

Problem to prior art exists, the utility model provides a collision type damper of bridge cable can improve the damping effect, can also avoid damper to collide with bridge cable when the vibration, causes the cable damage.

In order to realize the purpose of the utility model, the technical scheme of the utility model is as follows:

a collision type damper for a bridge cable, mounted on a cable body, comprising:

one end of the clamping piece is fixedly connected with the cable body;

the cantilever rod is fixedly connected with the other end of the clamping piece;

the mass block is arranged at the end head of the cantilever rod;

the blocking piece is fixedly connected with the cable body and is made of a viscoelastic material body and used for blocking the mass block from impacting the cable body.

Further, the mass comprises a first mass.

Further, the mass block further comprises a second mass block, and the first mass block and the second mass block are respectively arranged at two ends of the cantilever rod.

Further, the weight of the first mass and the weight of the second mass are different.

Further, the first and second masses have different distances to the connection of the cantilever lever and the clamping member.

Further, the blocking member is made of a rubber material.

Further, the mass is provided with a mass weight.

Furthermore, the mass block is of a U-shaped structure, and the open end of the mass block is opposite to the cantilever rod.

Further, the clamping piece and the cable body are detachably and fixedly connected.

Further, the blocking piece is detachably and fixedly connected with the cable body.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides a collision type damping hammer compares with conventional damping hammer, and this kind of collision type damping hammer has damping hammer and collision damper's power consumption characteristics concurrently. The cable has the advantages of being large in energy dissipation capacity and strong in robustness to system uncertainty, therefore, the stay cable with the large length is reduced, requirements of low-frequency vibration on the mass of the vibration reduction hammer mass block, the length of the cantilever bar and the damping of the vibration reduction hammer are controlled, and the cable is simple in structure, easy to install and economical in manufacturing cost. In addition, the collision type damper hammer can structurally avoid the damage of the cable caused by the collision of the hammer head on the cable.

Drawings

Fig. 1 is the utility model discloses collision type damping hammer structural schematic diagram of bridge cable is one.

Fig. 2 is a first schematic view of the collision type vibration damper for a bridge cable according to the embodiment of the present invention.

Fig. 3 is the utility model discloses bridge cable's collision type damping hammer structural schematic drawing two.

Fig. 4 is the utility model discloses bridge cable's collision type damping hammer structural schematic three.

Fig. 5 is the utility model discloses collision type damping hammer structural schematic diagram of bridge cable is four.

Fig. 6 is the utility model discloses collision type damping hammer structure schematic diagram of bridge cable is five.

Fig. 7 is the utility model discloses collision type damping hammer structure schematic diagram of bridge cable is six.

Fig. 8 is a top view of a mass block structure according to an embodiment of the present invention.

Fig. 9 is a perspective view of a mass structure according to an embodiment of the present invention.

Fig. 10 is a second working diagram of the impact type damper hammer according to the embodiment of the present invention.

Fig. 11 is a third schematic view of the operation of the collision-type damper hammer according to the embodiment of the present invention.

Fig. 12 is a fourth schematic view of the impact type vibration damper for the bridge cable according to the embodiment of the present invention.

In the figure, 1-clamp, 2-cantilever bar, 3-mass, 31-first mass, 32-second mass, 301-first mass weight, 302-second mass weight, 4-stop, 5-cable body.

Detailed Description

In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.

Example one

As shown in fig. 1, a collision type damper for a bridge cable, which is mounted on a cable body 5, includes:

the cable comprises a clamping piece 1, wherein one end of the clamping piece 1 is fixedly connected with a cable body 5;

the cantilever rod 2 is fixedly connected with the other end of the clamping piece 1;

the mass block 3 is arranged at the end of the cantilever rod 2;

the cable structure comprises a blocking piece 4, wherein the blocking piece 4 is fixedly connected with a cable body 5 and used for blocking the impact of the mass block 3 on the cable body 5, when the cable body 5 is specifically installed, the connecting installation positions of the clamping piece 1 and the blocking piece 4 on the cable body 5 are set according to the sizes of the clamping piece 1, the cantilever rod 2, the mass block 3 and the blocking piece 4, when the cable body 5 with the main structure vibrates and the vibration amplitude is large, the mass block 3 collides with the blocking piece 4 without impacting the cable body 5 when moving, the blocking piece 4 is made of a viscoelastic material, the viscoelastic material has a buffering effect of an elastic material and an effect of absorbing vibration energy through damping of the viscous material, the blocking piece 4 is made of a rubber material in the embodiment, and polyurethane, silica gel, polyacrylate or a composite material and the like can be adopted in other embodiments.

The working principle of the device is as follows:

as shown in fig. 2, when the guy cable body 5 of the main structure vibrates, the mass block 3 is driven to move, so as to drive the cantilever rod 2 to bend and deform, so that the cantilever rod 2 generates friction energy consumption, and a vibration damping effect is generated on the guy cable; meanwhile, when the vibration amplitude of the cable body 5 is large, the mass block 3 can collide with the blocking piece 4 during movement, and the blocking piece 4 is made of a viscoelastic material, so that the mechanical energy of the mass block 3 can be dissipated by collision, the vibration damping effect is further enhanced, and the vibration of the bridge inhaul cable can be inhibited as soon as possible. The blocking piece 4 also blocks the mass block 3 from impacting the inhaul cable body 5, so that the mass block 3 is prevented from impacting and damaging the inhaul cable.

In conclusion, the impact type damper hammer has the energy consumption characteristics of both the damper hammer and the impact damper, compared with the conventional damper hammer. The utility model provides a collision type damping hammer has bigger energy dissipation ability and to the stronger robustness of system uncertainty, consequently, has reduced the great cable of length, and the control low frequency vibration is to the quality of damping hammer quality piece, the length of cantilever bar and the damped requirement of damping hammer, product simple structure, easily installation, cost economy. In addition, the collision type damper hammer can structurally avoid the damage of the cable caused by the collision of the hammer head on the cable.

In this embodiment, the mass block 3 includes a first mass block 31, the first mass block 31 is disposed at one end of the cantilever rod 2, and the other end of the cantilever rod 2 is fixedly connected to the clamping member 1. When the damper is in operation, the first mass 31 moves up and down through the cantilever rod 2 around the joint of the cantilever rod 2 and the clamping member 1, and thus generates a resonant frequency. The embodiment can effectively inhibit the vibration of the stay cable in the area which corresponds to +/-10% of the resonant frequency, and has the advantages of simple structure, relatively low manufacturing cost and good economy.

As a priority scheme, the blocking piece 4 is connected with the cable body 5 in a detachable and fixed mode, so that the installation position can be conveniently adjusted according to the anti-vibration requirement of the cable body 5, and maintenance is also facilitated. The connection between the blocking member 4 and the cable 5 is realized by bolts, as shown in fig. 3. Snap connections, rivets, etc. may also be used in other embodiments.

As a priority scheme, the clamping piece 1 is connected with the cable body 5 in a detachable and fixed mode, the installation position can be adjusted conveniently according to the anti-vibration requirement of the cable body 5, and maintenance is facilitated. The connection between the clamping member 1 and the cable body 5 in the embodiment adopts a bolt connection, as shown in fig. 3. Snap connections, rivets, etc. may also be used in other embodiments.

Example two

The difference between the present embodiment and the first embodiment is that the mass block 3 includes two mass blocks, namely a first mass block 31 and a second mass block 32, and the first mass block 31 and the second mass block 32 are respectively disposed at two ends of the cantilever bar 2, as shown in fig. 4.

The masses of the first mass block 31 and the second mass block 32 and the distances from the first mass block to the connecting part of the cantilever rod 2 and the clamping piece 1 are the same, and therefore a resonant frequency is generated, as the total weight of the mass block 3 is doubled, the vibration damping effect is better, and the vibration damping device is suitable for damping large-size inhaul cables, and is equivalent to the vibration damping hammer in the first 2 embodiments. From the structural and aesthetic points of view, if the same resonant frequency and vibration damping effect as the present embodiment are obtained for the vibration damper according to the first embodiment, the weight of the first mass 31 is doubled, and the size of the first mass 31 and the length of the cantilever bar 2 are increased accordingly, so that the overall structure is too heavy and inconsistent. The present embodiment mass 3 is divided into the first mass 31 and the second mass 32, and although the total weight is doubled compared with the first embodiment, the size of the first mass 31 and the second mass 32 and the length of the cantilever lever 2 are not changed, and the structure is more harmonious.

EXAMPLE III

The difference between the present embodiment and the second embodiment is that the weight of the first mass block 31 is different from the weight of the second mass block 32, so that the first mass block 31 generates a resonant frequency f1, the second mass block 32 generates a resonant frequency f2, and f1 is smaller than f2, so as to form a wider resonant frequency band [ f1, f2], which can suppress the vibration of the cable resonant frequency band [ f1, f2] compared with the second embodiment. As shown in fig. 5.

Example four

The difference between this embodiment and the second embodiment is that, the distances from the first mass block 31 and the second mass block 32 to the joint of the cantilever bar 2 and the clamping member 1 are different, so that the first mass block 31 generates a resonant frequency f3, and the second mass block 32 generates a resonant frequency f4, where f3 is smaller than f4, so as to form a wider resonant frequency band [ f3, f4], and compared with the second embodiment, this scheme can suppress the vibration of the cable resonant frequency band [ f3, f4 ]. As shown in fig. 6.

EXAMPLE five

The present embodiment is different from the second embodiment in that the weight of the first mass block 31 is different from the weight of the second mass block 32, and the distances from the first mass block 31 and the second mass block 32 to the connecting position of the cantilever bar 2 and the clamping member 1 are also different. Meanwhile, the frequency range and the vibration damping effect of the vibration damper on the vibration damping of the inhaul cable can be optimal by adjusting the weight of the mass block 3 and the cantilever length of the cantilever rod 2, if only the weight of the mass block 3 is adjusted, the vibration damper can have a good energy consumption effect in a certain resonant frequency band, but the wide adjustment range of the resonant frequency of the vibration damper is limited, if only the length of the cantilever rod 2 is adjusted, the resonant frequency expansibility of the vibration damper is good, but if the weight configuration of the mass block 3 is not appropriate, the vibration damper does not work due to large weight, the energy consumption effect of the vibration damper is not good due to small weight, and therefore the energy consumption effect and the resonant frequency bandwidth of the vibration damper can reach an optimal configuration parameter by adjusting the weight of the mass block 3 and the cantilever length of the cantilever rod 2 simultaneously. As shown in fig. 7.

EXAMPLE six

On the basis of the first embodiment, the first mass block 31 is of a U-shaped structure, the open end of the first mass block faces the cantilever rod 2, the cantilever rod 2 extends into the U-shaped structure, and the concave portion of the U-shaped structure is connected with the U-shaped structure, so that the overall overlong of the damper can be avoided on the premise that the length of the cantilever rod 2 is not changed, the structure is compact, and meanwhile, the weight configuration at two ends of the U-shaped structure is facilitated. As shown in fig. 8 and 9, the first mass block 31 has an uneven mass distribution while maintaining the overall mass, and the mass weights 301 are formed by adding the required mass to the two ends of the U-shaped structure of the first mass block 31. When the damper is operated, in addition to the first mass 31 moving up and down around the joint of the cantilever rod 2 and the clamping member 1 through the cantilever rod 2 and thereby generating a resonant frequency, the first mass counterweight 301 may also move up and down around the joint of the cantilever rod 2 and the first mass 31 and thereby generating a resonant frequency, as shown in fig. 10. In other embodiments, the mass weights may be located elsewhere in the U-shaped structure as desired.

In this embodiment, the first mass block 31 is a U-shaped structure, for example, to explain the working principle of the mass balance weight, in other embodiments, the first mass block 31 may also adopt other structures, and the first mass block 31 moves up and down around the joint of the cantilever rod 2 and the clamping member 1 through the cantilever rod 2, thereby generating one resonant frequency; the first mass balance weight 301 in the first mass 31 can also move up and down around the connection of the cantilever bar 2 and the first mass 31, thereby generating a resonant frequency, so that the first mass 31 forms a resonant frequency band. Compared with the first embodiment, the frequency range corresponding to the first embodiment, in which the vibration of the cable can be suppressed, is also increased.

EXAMPLE seven

On the basis of the second embodiment, the first mass block 31 is a U-shaped structure, an open end of the first mass block faces the cantilever rod 2, the cantilever rod 2 extends into the U-shaped structure, a concave portion of the U-shaped structure is connected with the U-shaped structure, and first mass weights 301 are arranged on two sides of the open end. When the damper is in operation, except that the first mass block 31 moves up and down around the joint of the cantilever rod 2 and the clamping member 1 through the cantilever rod 2, a resonant frequency is generated; the first mass weight 301 in the first mass block 31 can also move up and down around the connection between the cantilever bar 2 and the first mass block 31, thereby generating a resonant frequency, so that the first mass block 31 forms a resonant frequency band, so that, in addition to the resonant frequency generated by the second mass block 32, the present embodiment has three resonant frequencies, as shown in fig. 11, the frequency range in which the cable vibration can be suppressed is also increased compared with the second embodiment.

Example eight

On the basis of the seventh embodiment, the second mass block 32 is also of a U-shaped structure, an open end of the second mass block faces the cantilever rod 2, the cantilever rod 2 extends into the U-shaped structure, a concave portion of the U-shaped structure is connected with the U-shaped structure, and second mass weights 302 are arranged on two sides of the open end. When the vibration damper works, except that the second mass block 32 moves up and down around the joint of the cantilever rod 2 and the clamping piece 1 through the cantilever rod 2, a resonant frequency is generated; the second mass balance 302 in the second mass block 32 can also move up and down around the connection between the cantilever rod 2 and the first mass block 32, thereby generating a resonant frequency, so that the second mass block 32 forms a resonant frequency band, and thus, in addition to the two resonant frequencies generated by the first mass block 31, the present embodiment has four resonant frequencies, as shown in fig. 12, compared with the seventh embodiment, the frequency range for suppressing the cable vibration is also increased.

The sixth embodiment, the seventh embodiment and the eighth embodiment are only to demonstrate that the mass balance weight is applied to different occasions to produce corresponding effects, and accordingly, the mass balance weight can also be applied to other occasions, for example, the weight of the first mass block 31 is different from that of the second mass block 32, the distances from the first mass block 31 and the second mass block 32 to the connecting part of the cantilever bar 2 and the clamping piece 1 are different, and the corresponding effects are produced, the principle is the same, and details are not described again.

Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. The utility model provides a collision type damper of bridge cable, installs on cable body (5), its characterized in that includes:

the cable comprises a clamping piece (1), wherein one end of the clamping piece (1) is fixedly connected with a cable body (5);

the cantilever rod (2), the cantilever rod (2) is fixedly connected with the other end of the clamping piece (1);

the mass block (3) is arranged at the end head of the cantilever rod (2);

the blocking piece (4) is fixedly connected with the cable body (5), and the blocking piece (4) is a viscoelastic material body and used for blocking the mass block (3) from impacting the cable body (5).

2. A crash-type damper for a bridge cable according to claim 1, characterized in that said mass (3) comprises a first mass (31).

3. The impact damper for a bridge cable according to claim 2, wherein said mass (3) further comprises a second mass (32), said first mass (31) and second mass (32) being respectively disposed at both ends of said cantilever lever (2).

4. A collision-type damper for a bridge cable according to claim 3, wherein the weight of the first mass (31) and the weight of the second mass (32) are different.

5. A bridge cable impact damper according to claim 3 or 4, wherein the first and second masses (31, 32) are at different distances from the point where the cantilever bar (2) is connected to the clamp (1).

6. A collision-type damper for a bridge cable according to claim 1, characterized in that the stopper (4) is a rubber material.

7. A collision type damper for a bridge cable according to claim 1, characterized in that the mass block (3) is provided with a mass weight.

8. The impact damper for a bridge cable according to claim 1, wherein the mass (3) is of a U-shaped structure, and an open end of the mass faces the cantilever (2).

9. The impact type damper for bridge cables according to claim 1, wherein the clamp (1) is detachably and fixedly connected with the cable body (5).

10. The impact damper for bridge cables according to claim 1, characterized in that said blocking element (4) is removably and fixedly connected to the cable body (5).

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