CN216200116U

CN216200116U - Eddy current damper for controlling external vibration of stay cable

Info

Publication number: CN216200116U
Application number: CN202122929854.6U
Authority: CN
Inventors: 李向群; 徐佳炜
Original assignee: ZHIXING S&T Ltd
Current assignee: ZHIXING S&T Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-05
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses an eddy current damper for controlling the external vibration of a stay cable, which belongs to the technical field of bridge vibration control and comprises a connecting rod, wherein the bottom of the connecting rod is provided with a four-stage damping cylinder, the four-stage damping cylinder is sleeved on the periphery of the bottom of the connecting rod, the bottom of the four-stage damping cylinder is provided with a three-stage damping cylinder, the three-stage damping cylinder is arranged at the bottom end of the four-stage damping cylinder in a sleeved mode, the bottom of the three-stage damping cylinder is provided with a two-stage damping cylinder, the two-stage damping cylinder is arranged at the bottom end of the three-stage damping cylinder in a sleeved mode, the one-stage damping cylinder is arranged at the bottom end of the two-stage damping cylinder in a sleeved mode, the problems that the existing majority of dampers have smaller self displacement stroke, the dampers need to be designed to be larger to be suitable when the engineering structure generates large-amplitude vibration, and the vibration control of the dampers is weakened due to the smaller self displacement stroke, thereby the out-of-plane control effect is general and the ideal state is not achieved.

Description

Eddy current damper for controlling external vibration of stay cable

Technical Field

The utility model belongs to the technical field of bridge vibration control, and particularly relates to an eddy current damper for controlling the out-of-plane vibration of a stay cable.

Background

The vibration problem of the stay cable is one of the main problems of the structural safety of the large-span cable-stayed bridge, and research shows that: because the initial damping ratio of the stay cable is very small, the damping ratio of the stay cable is improved by adding a damping device, and various common stay cable vibration modes can be effectively controlled. The main vibration modes of the stay cable are various wind-induced vibrations, and generally, the vibration mode of the stay cable in a vertical projection plane is called in-plane vibration, and the vibration mode perpendicular to the projection plane is called out-of-plane vibration. Because the vibration direction of the stay cable is perpendicular to the direction of the incoming wind, when the incoming wind and the axis of the bridge have a certain included angle, the stay cable generates spatial vibration simultaneously comprising in-plane vibration and out-of-plane vibration, the motion trail of any point in the cable is elliptic, and the in-plane vibration displacement is generally larger than the out-of-plane vibration.

At present, most of existing dampers are small in displacement stroke, the energy dissipated by the dampers in structural vibration control is related to the material performance of the dampers and the relative deformation of structures at installation positions of the dampers, when large-amplitude vibration is generated in an engineering structure, the size of the dampers needs to be designed to be large to be suitable, the vibration control of the dampers is weakened due to the fact that the stroke of the damper is small, the out-of-plane control effect is general, and the ideal state cannot be achieved, and therefore the eddy current damper for out-of-plane vibration control of the stay cable is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an eddy current damper for controlling the out-of-plane vibration of a stay cable, and aims to solve the problems that most of existing dampers are provided in the background art, because the displacement stroke of the dampers is small, the energy dissipated by the dampers in structural vibration control is not only related to the material performance of the dampers, but also related to the relative deformation of structures at the installation positions of the dampers, when a large-amplitude vibration is generated in an engineering structure, the size of the dampers needs to be designed to be large to be applicable, and the small displacement stroke of the dampers can cause the vibration control of the dampers to be weakened, so that the out-of-soft control effect is general and the ideal state cannot be achieved.

In order to achieve the purpose, the utility model provides the following technical scheme: the eddy current damper for stay cable out-of-plane vibration control comprises a connecting rod, a contact pad and a fixing seat, wherein a four-stage damping cylinder is arranged at the bottom of the connecting rod, the periphery of the bottom of the connecting rod is arranged at the four-stage damping cylinder sleeve, the four-stage damping cylinder is connected with the bottom of the connecting rod in a sliding manner, a three-stage damping cylinder is arranged at the bottom of the four-stage damping cylinder in a sleeved manner, a second-stage damping cylinder is arranged at the bottom of the three-stage damping cylinder in a sleeved manner, the second-stage damping cylinder is arranged at the bottom of the three-stage damping cylinder in a sleeved manner, and the bottom of the second-stage damping cylinder is provided with a first-stage damping cylinder which is arranged at the bottom of the second-stage damping cylinder in a sleeved manner, and the first-stage damping cylinder, the second-stage damping cylinder, the third-stage damping cylinder and the four-stage damping cylinder are sequentially connected in a sliding manner.

Preferably, the bottom of connecting rod, second grade damping cylinder, tertiary damping cylinder and level four damping cylinder all is equipped with the activity stopper, and is a plurality of the activity stopper is fixed respectively with the bottom of second grade damping cylinder, tertiary damping cylinder and level four damping cylinder, the inside one end inner wall of one-level damping cylinder, second grade damping cylinder, tertiary damping cylinder and level four damping cylinder is equipped with the fixed plate, one side of fixed plate is equipped with the fixing base, and is a plurality of the fixed plate is fixed respectively in the inside one end inner wall of one-level damping cylinder, second grade damping cylinder, tertiary damping cylinder and level four damping cylinder through the fixing base that is equipped with.

Preferably, the movable plug and the fixed plate are provided with contact pads on opposite sides thereof, and the contact pads are fixedly arranged on opposite sides of the movable plug and the fixed plate in a gluing manner.

Preferably, the one end periphery of activity stopper is equipped with first slider, first slider passes through the fixed one end periphery that sets up respectively in the activity stopper of welded mode, one side of first slider still is equipped with the second slider, the second slider passes through the fixed bottom periphery that sets up in connecting rod, second grade damping cylinder, tertiary damping cylinder and level four damping cylinder of welded mode.

Preferably, the inner wall both sides of one-level damping cylinder, second grade damping cylinder, tertiary damping cylinder and level four damping cylinder are equipped with the spout, the degree of depth and the width of spout are the same with the length and the height of first slider and second slider.

Preferably, the top of connecting rod is equipped with the sleeve, telescopic bottom is through the top fixed connection of welded mode with the connecting rod, telescopic inside is equipped with the bearing, the periphery and the telescopic inner wall fixed connection of bearing.

Preferably, the inner ring of the bearing is provided with a stay cable, the stay cable is movably connected with the sleeve through the bearing, the bottom of the first-stage damping cylinder is provided with a bridge floor, and the first-stage damping cylinder is fixedly arranged on the bridge floor through a mounting seat.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the single attenuator with the connecting rod bottom, upgrade it into multistage attenuator according to the actual demand, increase the displacement distance of connecting rod, promote the deformation degree of connecting rod, make it can increase shock control, improve absorbing ability, guarantee the effect of its off-plate control, the effectual most attenuator that has solved has now because self displacement stroke is less, need can be suitable for the great side of the size design of attenuator when engineering structure produces vibration by a wide margin, the stroke of self displacement is less can lead to the shock control of attenuator to weaken, thereby make the off-plate control effect general, reach the problem of ideal state.

2. Through the contact pad that is equipped with, realize the flexible contact between activity stopper and the fixed plate, because activity stopper and fixed plate are the metal material, prevent at long-time contact in-process through the contact pad, the wearing and tearing that cause improve its life.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a multi-angle structure of the present invention;

FIG. 3 is a schematic view of the internal structure of each stage of damping cylinder according to the present invention;

FIG. 4 is an enlarged view of A in FIG. 3 according to the present invention;

fig. 5 is an enlarged structural diagram of B in fig. 3 according to the present invention.

In the figure: 1. a connecting rod; 2. a sleeve; 3. a bearing; 4. a stay cable; 5. a primary damping cylinder; 6. a secondary damping cylinder; 7. a tertiary damping cylinder; 8. a four-stage damping cylinder; 9. a bridge deck; 10. a fixing plate; 11. a movable plug; 12. a contact pad; 13. a chute; 14. a first slider; 15. a second slider; 16. a fixed seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution of an eddy current damper for controlling out-of-plane vibration of a stay cable: including connecting rod 1, contact pad 12 and fixing base 16, the bottom of connecting rod 1 is equipped with a level four damping section of thick bamboo 8, the bottom periphery with connecting rod 1 is established to a level four damping section of thick bamboo 8 cover, level four damping section of thick bamboo 8 and connecting rod 1's bottom sliding connection, level four damping section of thick bamboo 8's bottom is equipped with a tertiary damping section of thick bamboo 7, the mode that tertiary damping section of thick bamboo 7 was established through the cover sets up in level four damping section of thick bamboo 8's bottom, the bottom of tertiary damping section of thick bamboo 7 is equipped with a second grade damping section of thick bamboo 6, the mode that a second grade damping section of thick bamboo 6 was established through the cover sets up in level two damping section of thick bamboo 6's bottom, a level damping section of thick bamboo 5, a second grade damping section of thick bamboo 6, in proper order sliding connection between a tertiary damping section of thick bamboo 7 and the level four damping section of thick bamboo 8.

In this embodiment, through the single attenuator with connecting rod 1 bottom, upgrade it into multistage attenuator according to the actual demand, increase connecting rod 1's displacement distance, promote connecting rod 1's deformation degree, make it can increase shock control, improve absorbing ability, guarantee the effect of its off-plate control, effectual solved current most attenuator because self displacement stroke is less, need be suitable for the great side of size design of attenuator when engineering structure produces vibration by a wide margin, the stroke of self displacement is less can lead to the shock control of attenuator to weaken, thereby make off-plate control effect general, reach the problem of ideal state.

Specifically, connecting rod 1, second grade damping cylinder 6, the bottom of tertiary damping cylinder 7 and level four damping cylinder 8 all is equipped with movable stopper 11, a plurality of movable stopper 11 are fixed respectively with second grade damping cylinder 6, the bottom of tertiary damping cylinder 7 and level four damping cylinder 8, one-level damping cylinder 5, second grade damping cylinder 6, the inside one end inner wall of tertiary damping cylinder 7 and level four damping cylinder 8 is equipped with fixed plate 10, one side of fixed plate 10 is equipped with fixing base 16, a plurality of fixed plates 10 are fixed respectively in one-level damping cylinder 5 through the fixing base 16 that is equipped with, second grade damping cylinder 6, the inside one end inner wall of tertiary damping cylinder 7 and level four damping cylinder 8.

In the embodiment, the impact force of the two-stage damping cylinder when the deformation reaches the limit is reduced through the fixed plate 10 and the movable plug 11, so that the durability of the damping cylinder is improved, and the service life of the damping cylinder is ensured.

Specifically, the opposite sides of the movable plug 11 and the fixed plate 10 are provided with contact pads 12, and the contact pads 12 are fixedly arranged on the opposite sides of the movable plug 11 and the fixed plate 10 by gluing.

In this embodiment, through the contact pad 12 that is equipped with, realize the flexible contact between activity stopper 11 and the fixed plate 10, because activity stopper 11 is the metal material with fixed plate 10, prevent the wearing and tearing that cause at long-time contact in-process through contact pad 12, improve its life.

Specifically, the one end periphery of activity stopper 11 is equipped with first slider 14, and first slider 14 still is equipped with second slider 15 through the fixed bottom periphery that sets up in connecting rod 1, second grade damping cylinder 6, tertiary damping cylinder 7 and level four damping cylinder 8 that sets up respectively in the one end periphery of activity stopper 11 of welded mode through the fixed one side that sets up of welded mode, first slider 14, second slider 15.

In this embodiment, the sliding connection between the damping cylinders of the respective stages and the connecting rod 1 is realized by the first slider 14 and the second slider 15, so that the mobility between the damping cylinders of the respective stages and the connecting rod 1 is ensured.

Specifically, the two sides of the inner wall of the first-stage damping cylinder 5, the second-stage damping cylinder 6, the third-stage damping cylinder 7 and the fourth-stage damping cylinder 8 are provided with sliding grooves 13, and the depth and the width of each sliding groove 13 are the same as the length and the height of each first sliding block 14 and each second sliding block 15.

In this embodiment, through the spout 13 that is equipped with, cooperation first slider 14 and second slider 15, when guaranteeing the activity that connects gradually between damping cylinder and the connecting rod 1 at different levels, can also play spacing effect, prevent to be elongated to the limit under the drive of connecting rod 1, damping cylinder and connecting rod 1 at different levels take place to break away from to lead to cause its damped effect.

Specifically, the top of connecting rod 1 is equipped with sleeve 2, and welded mode and connecting rod 1's top fixed connection are passed through to sleeve 2's bottom, and sleeve 2's inside is equipped with bearing 3, and bearing 3's periphery and sleeve 2's inner wall fixed connection.

In the embodiment, the movable connection between the damper and the bridge cable is realized through the sleeve 2 and the bearing 3, so that the brake resistance can be stably provided, and the effect of protecting the bridge body is achieved.

Specifically, the inner ring of the bearing 3 is provided with a stay cable 4, the stay cable 4 is movably connected with the sleeve 2 through the bearing 3, the bottom of the primary damping cylinder 5 is provided with a bridge deck 9, and the primary damping cylinder 5 is fixedly arranged on the bridge deck 9 through a mounting seat

In this embodiment, through being equipped with suspension cable 4, realize the swing joint between bridge and the attenuator, the operation that makes the attenuator can be stable provides the resistance for it to guarantee the safety of the bridge body.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The eddy current damper for controlling the out-of-plane vibration of the stay cable comprises a connecting rod (1), a contact pad (12) and a fixed seat (16), and is characterized in that: the bottom of connecting rod (1) is equipped with a level four damping section of thick bamboo (8), the bottom periphery with connecting rod (1) is established to a level four damping section of thick bamboo (8) cover, the bottom sliding connection of a level four damping section of thick bamboo (8) and connecting rod (1), the bottom of a level four damping section of thick bamboo (8) is equipped with a tertiary damping section of thick bamboo (7), the mode of establishing through the cover in a level four damping section of thick bamboo (7) sets up in the bottom of a level four damping section of thick bamboo (8), the bottom of a level three damping section of thick bamboo (7) is equipped with a level damping section of thick bamboo (5), the mode of establishing through the cover in a level two damping section of thick bamboo (5) sets up in the bottom of a level two damping section of thick bamboo (6) in a level one damping section of thick bamboo (5), a level two damping section of thick bamboo (6), The three-stage damping cylinder (7) and the four-stage damping cylinder (8) are sequentially connected in a sliding manner.

2. The eddy current damper for out-of-plane vibration control of a stay cable according to claim 1, wherein: the bottom of connecting rod (1), second grade damping cylinder (6), tertiary damping cylinder (7) and level four damping cylinder (8) all is equipped with movable stopper (11), and is a plurality of movable stopper (11) are fixed respectively with the bottom of second grade damping cylinder (6), tertiary damping cylinder (7) and level four damping cylinder (8), the inside one end inner wall of one-level damping cylinder (5), second grade damping cylinder (6), tertiary damping cylinder (7) and level four damping cylinder (8) is equipped with fixed plate (10), one side of fixed plate (10) is equipped with fixing base (16), and is a plurality of fixed plate (10) are fixed respectively in the inside one end inner wall of one-level damping cylinder (5), second grade damping cylinder (6), tertiary damping cylinder (7) and level four damping cylinder (8) through fixing base (16) that are equipped with.

3. The stay cable out-of-plane vibration controlled eddy current damper according to claim 2, wherein: contact pads (12) are arranged on the opposite sides of the movable plug (11) and the fixed plate (10), and the contact pads (12) are fixedly arranged on the opposite sides of the movable plug (11) and the fixed plate (10) in a gluing mode.

4. The eddy current damper for out-of-plane vibration control of a stay cable according to claim 3, wherein: the one end periphery of activity stopper (11) is equipped with first slider (14), first slider (14) are fixed through the welded mode and set up respectively in the one end periphery of activity stopper (11), one side of first slider (14) still is equipped with second slider (15), second slider (15) are fixed through the welded mode and set up in the bottom periphery of connecting rod (1), second grade damping cylinder (6), tertiary damping cylinder (7) and level four damping cylinder (8).

5. The stay cable out-of-plane vibration controlled eddy current damper according to claim 4, wherein: the inner wall both sides of one-level damping cylinder (5), second grade damping cylinder (6), tertiary damping cylinder (7) and level four damping cylinder (8) are equipped with spout (13), the degree of depth and the width of spout (13) are the same with the length and the height of first slider (14) and second slider (15).

6. The eddy current damper for out-of-plane vibration control of a stay cable according to claim 1, wherein: the top of connecting rod (1) is equipped with sleeve (2), the top fixed connection of welded mode and connecting rod (1) is passed through to the bottom of sleeve (2), the inside of sleeve (2) is equipped with bearing (3), the periphery of bearing (3) and the inner wall fixed connection of sleeve (2).

7. The stay cable out-of-plane vibration controlled eddy current damper according to claim 6, wherein: the inner ring of bearing (3) is equipped with suspension cable (4), suspension cable (4) and sleeve (2) swing joint through bearing (3) that are equipped with, the bottom of one-level damping cylinder (5) is equipped with bridge floor (9), one-level damping cylinder (5) pass through the mount pad fixed set up in bridge floor (9).