CN220248790U - Self-resetting variable-rigidity viscous damper - Google Patents
Self-resetting variable-rigidity viscous damper Download PDFInfo
- Publication number
- CN220248790U CN220248790U CN202321839952.3U CN202321839952U CN220248790U CN 220248790 U CN220248790 U CN 220248790U CN 202321839952 U CN202321839952 U CN 202321839952U CN 220248790 U CN220248790 U CN 220248790U
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- piston
- piston assembly
- self
- viscous damper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000013016 damping Methods 0.000 claims abstract description 22
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 12
- 238000005265 energy consumption Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The utility model discloses a self-resetting variable-stiffness viscous damper, and relates to the technical field of bridge anti-seismic dampers, wherein the variable-stiffness viscous damper comprises: the damping device comprises a cylinder body, a piston assembly and a supporting assembly, wherein through holes are respectively formed in two ends of the cylinder body, and damping medium is filled in the cylinder body; the piston component is sleeved in the cylinder body in a sliding way; two ends of the piston assembly extend out of the cylinder body through the through holes respectively, and a reset spring is fixed between one end of the piston assembly and the outer wall of the cylinder body; the plurality of articulated seats are fixed on the lateral wall of cylinder body, and the quantity and the articulated seat of bracing piece correspond, and the one end and the articulated seat of bracing piece rotate to be connected, and the one end fixed connection of cylinder body is extended with the piston assembly to the other end of bracing piece, provides initial rigidity for the attenuator through the bracing piece. According to the utility model, the rigidity of the damper is variable through connection and disconnection between the support rod and the piston assembly, and the damper can be repaired after being broken, so that the damper can be repeatedly used.
Description
Technical Field
The utility model relates to the technical field of bridge anti-seismic dampers, in particular to a self-resetting variable-rigidity viscous damper.
Background
Earthquake and strong wind are natural disasters with very high destructiveness, and the disasters have very high destructiveness to large bridges and high-rise buildings, so that serious potential safety hazards and economic losses can be caused, and the problem of how to furthest lighten the threat of the earthquake disasters and the wind disasters to the safety of human beings and the damage to the economy is very serious.
In recent years, by arranging the energy dissipation device on the structure, the energy dissipation device consumes the vibration energy of the structure by utilizing the relative displacement and the relative speed generated by the structure during vibration, and the vibration reaction of the structure is reduced, so that the purposes of damping and dissipating energy are achieved. The common damping and energy dissipating device is divided into a speed type and a displacement type, the metal damper and the friction damper belong to displacement type dampers, the consumed energy and the provided damping force are related to the relative displacement generated when the structure vibrates, and the larger the relative displacement is, the better the energy dissipation and shock absorption effect is; viscoelastic dampers and viscous dampers belong to velocity type dampers, and the larger the relative velocity of the structure during vibration, the larger the damping force can be provided by the two dampers.
But the requirements of the earthquake of different grades on the energy dissipation and shock absorption device are different, and under the condition of facing small earthquake or wind load, the energy dissipation and shock absorption device is required to provide an initial rigidity for the structure to resist the earthquake load and the wind load; under medium-high intensity earthquake, larger damping needs to be provided for the structure, energy brought by the earthquake is consumed, and damage of the earthquake to the structure is reduced. However, the viscous damper itself has no rigidity, and it is difficult to realize variable rigidity. Meanwhile, the viscous damper does not have a self-resetting function, and the structure can generate larger residual displacement to influence the traffic after earthquake.
Therefore, how to provide a self-resetting variable-stiffness viscous damper which can provide initial stiffness, can provide subsequent damping, has a self-resetting function and can be repeatedly used is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present utility model provides a self-resetting variable stiffness viscous damper, which aims to solve the above technical problems.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a self-resetting variable-rigidity viscous damper, which comprises: a cylinder, a piston assembly and a support assembly;
through holes are respectively formed at two ends of the cylinder body, and damping medium is filled in the cylinder body; the piston assembly is coaxially sleeved in the cylinder body and is in sliding connection with the cylinder body;
the two ends of the piston assembly extend out of the cylinder body through the through holes respectively, and a reset spring is fixed between one end of the piston assembly and the outer wall of the cylinder body;
the support assembly includes: the number of the hinge seats is multiple, the hinge seats are fixed on the outer side wall of the cylinder body, the number of the support rods corresponds to the hinge seats, one end of each support rod is rotationally connected with the hinge seat, and the other end of each support rod is fixedly connected with one end of each piston assembly extending out of the cylinder body.
Compared with the prior art, the utility model discloses a self-resetting variable-rigidity viscous damper, wherein damping medium is filled in the cylinder, a piston assembly is connected in the cylinder in a sliding manner, two ends of the piston assembly extend out of the cylinder, and the piston assembly is connected with the outer wall of the cylinder through a reset spring; in addition, a hinging seat is fixed on the outer side wall of the cylinder body, the hinging seat is hinged with a supporting rod, the other end of the supporting rod is fixed with a piston assembly, and when the viscous damper faces small earthquake and wind load, the supporting rod and the piston assembly are relatively fixed, so that initial rigidity is provided for the device; when the viscous damper faces larger earthquake and wind load, the fixed connection part between the supporting rod and the piston assembly is broken, the viscous damper starts to operate, damping is provided for the structure, and energy is dissipated.
Preferably, one end of the support rod, which is far away from the hinge seat, is welded with one end of the piston assembly, which extends out of the cylinder body, so that the damper is fixed with the piston assembly through the support rod to provide initial rigidity when facing small earthquake and wind load.
Preferably, one end of the cylinder body is connected with a cavity in an extending manner, a plurality of disc springs are sequentially stacked on the bottom surface inside the cavity, the top end of each disc spring is fixedly connected with a sliding plate, the sliding plate is positioned below the bottom end of the piston assembly, and the sliding plate is in sliding connection with the inner side wall of the cavity; when the energy consumption of the damper is about to reach the limit, the piston assembly compresses the sliding plate, the sliding plate slides downwards to compress a plurality of stacked disc springs to realize variable rigidity, and after the earthquake is ended, the disc springs are reset, so that the restoring force of the damper is increased, the piston is helped to return to the initial position, and the residual displacement is reduced.
Preferably, a plurality of stop blocks are fixed on the inner side wall of the chamber, and the stop blocks are positioned above the sliding plate and are abutted with the top surface of the sliding plate; a plurality of stop blocks are fixed on the inner side wall of the chamber to limit the moving range of the sliding plate, so that the variable rigidity of the damper can be adjusted.
Preferably, the piston assembly includes: the piston head is sleeved in the cylinder body in a sliding manner, a gap is reserved between the piston head and the inner side wall of the cylinder body, and the piston rod penetrates through the piston head and is fixedly connected with the piston head; the gap is arranged between the piston head and the inner side wall of the cylinder body, the larger the gap is, the smaller the damping force is, and the larger the smaller the gap is, the smaller the damping force is, so that the gap is set to be infinitesimal, but the damping liquid needs to be ensured to circulate in the cylinder body, and the purpose of energy consumption of the damper is achieved.
Preferably, one end of the piston rod is fixedly connected with a head connecting ring, the other end of the piston rod is of a T-shaped structure, and the T-shaped structure is positioned in the cavity; the piston rod is of a T-shaped structure, so that the piston rod can be prevented from retracting into the cylinder body in the resetting process of the damper, the contact area between the piston rod and the sliding plate is increased when the damper works, acting force is correspondingly applied to the disc spring, stress deflection caused by an earthquake is avoided, and impact damage is caused to other devices.
Preferably, one end of the cavity, which is far away from the cylinder body, is fixedly connected with a tail connecting ring.
Compared with the prior art, the utility model discloses the self-resetting variable-rigidity viscous damper, which has the following beneficial effects:
1. according to the utility model, through the arrangement of the supporting component, one end of the supporting rod is hinged with the cylinder body, and the other end of the supporting rod is fixedly connected with the piston component, so that initial rigidity is provided for the device, and small earthquake and wind loads are resisted; when the earthquake and wind load are relatively large, the fixed end of the supporting component breaks, preliminary energy consumption is carried out, then the damper starts to provide damping, and further energy consumption is started.
2. According to the utility model, through the arrangement of the disc springs, after the supporting component is broken, the piston rod compresses the sliding plate, so that the disc springs are compressed, rigidity is provided for the damper, the rigidity is variable, and simultaneously, the restoring force of the damper can be increased when the disc springs return after earthquake.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a damper according to the present utility model in an initial state;
FIG. 2 is a schematic view of a support arm according to the present utility model in a broken state;
fig. 3 is a schematic view of a disc spring in a compressed state according to the present utility model.
Wherein:
the device comprises a 1-cylinder body, a 2-piston assembly, a 3-return spring, a 4-support assembly, a 5-hinge seat, a 6-support rod, a 7-chamber, an 8-disc spring, a 9-slide plate, a 10-stop block, an 11-piston head, a 12-piston rod, a 13-head connection and a 14-tail connection and exchange.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-3, an embodiment of the present utility model discloses a self-resetting variable stiffness viscous damper, comprising: a cylinder 1, a piston assembly 2 and a support assembly 4;
through holes are respectively formed at two ends of the cylinder body 1, and damping medium is filled in the cylinder body 1; the piston assembly 2 is coaxially sleeved inside the cylinder body 1 and is in sliding connection with the cylinder body 1; two ends of the piston assembly 2 extend out of the cylinder body 1 through the through holes respectively, and a reset spring 3 is fixed between one end of the piston assembly 2 and the outer wall of the cylinder body 1; the support assembly 4 includes: the cylinder body 1 comprises a plurality of hinge seats 5 and a plurality of support rods 6, wherein the hinge seats 5 are fixed on the outer side wall of the cylinder body 1, the support rods 6 correspond to the hinge seats 5, one ends of the support rods 6 are rotationally connected with the hinge seats 5, and the other ends of the support rods 6 are fixedly connected with one ends of the piston assemblies 2 extending out of the cylinder body 1.
In order to further optimize the technical scheme, one end of the supporting rod 6 far away from the hinge seat 5 is welded with one end of the piston assembly 2 extending out of the cylinder body 1, so that the damper is fixed with the piston assembly 2 through the supporting rod 4 to provide initial rigidity when facing small earthquake and wind loads.
In order to further optimize the technical scheme, one end of the cylinder body 1 is connected with the cavity 7 in an extending manner, a plurality of disc springs 8 are sequentially stacked on the bottom surface in the cavity 7, the top ends of the disc springs 8 are fixedly connected with the sliding plates 9, the sliding plates 9 are positioned below the bottom end of the piston assembly 2, and the sliding plates 9 are in sliding connection with the inner side walls of the cavity 7; when the energy consumption of the damper is about to reach the limit, the piston assembly 2 compresses the sliding plate 9, the sliding plate 9 slides downwards to compress the plurality of stacked disc springs 8 to realize variable rigidity, and after the earthquake is over, the disc springs 8 are reset, so that the restoring force of the damper is increased, the piston assembly 2 is helped to return to the initial position, and the residual displacement is reduced.
In order to further optimize the technical scheme, a plurality of stop blocks 10 are fixed on the inner side wall of the chamber 7, and the stop blocks 10 are positioned above the sliding plate 9 and are abutted with the top surface of the sliding plate 9; a plurality of stop blocks 10 are fixed on the inner side wall of the chamber 7 to limit the moving range of the sliding plate 9, so that the variable rigidity of the damper can be adjusted.
In order to further optimise the above solution, the piston assembly 2 comprises: the piston head 11 is sleeved in the cylinder body 1 in a sliding manner, a gap is reserved between the piston head 11 and the inner side wall of the cylinder body 1, and the piston rod 12 penetrates through the piston head 11 and is fixedly connected with the piston head 11; by providing a gap between the piston head 11 and the inner side wall of the cylinder 1, the larger the gap, the smaller the gap, and the larger the damping force, so the gap is set to be infinitely small, but it is necessary to ensure that the damping liquid can circulate inside the cylinder, thereby achieving the purpose of energy consumption of the damper.
In order to further optimize the technical scheme, one end of the piston rod 12 is fixedly connected with a head connecting ring 13, the other end of the piston rod 12 is of a T-shaped structure, and the T-shaped structure is positioned in the cavity 7; the piston rod 12 is of a T-shaped structure, so that the damper can be prevented from retracting into the cylinder body in the resetting process, the contact area between the damper and the sliding plate 9 can be increased when the damper works, acting force is correspondingly applied to the disc spring 8, stress deflection caused by an earthquake is avoided, and impact damage is caused to other devices.
In order to further optimize the technical scheme, one end of the chamber 7, which is far away from the cylinder body 1, is fixedly connected with a tail connecting ring 14; the head connecting ring 13 and the tail connecting ring 14 are respectively connected to the bridge pier and the bridge, and relative displacement is generated between the bridge pier and the bridge when an earthquake occurs, so that relative displacement is generated between the head connecting ring 13 and the tail connecting ring 14, and the relative displacement generated by the damper due to the earthquake is more accurate; during the reset after the earthquake, the reset spring 3 can be assisted, so that the piston rod 12 and the piston head 11 can smoothly complete the reset.
The working process of the embodiment is as follows:
firstly, damping medium is filled in the cylinder body 1, then the piston assembly 2 is connected in a sliding manner in the cylinder body 1, at the moment, two ends of the piston assembly 2 extend out of the cylinder body, and the piston assembly 2 is connected with the outer wall of the cylinder body 1 through a return spring 3; the return spring 3 is correspondingly compressed or stretched along with the movement of the piston rod 12, and the return spring 3 can provide a return force to enable the piston assembly 2 to return to the pre-earthquake position, so that residual displacement between pier beams is reduced. Because the volume of the part of the piston rod 12 entering the cylinder body 1 is constant, the phenomenon that vacuum occurs in the cylinder body 1 due to the influence of the piston rod 12 on the pressure of liquid in the cylinder is avoided, and the piston rod 12 is propped against and cannot move freely due to the overlarge pressure in the cylinder body 1 is avoided; in addition, a hinging seat 5 is fixed on the outer side wall of the cylinder body 1, the hinging seat 5 is hinged with a supporting rod 6, the other end of the supporting rod 6 is fixed with the piston assembly 2, and when the viscous damper faces small earthquake and wind load, the supporting rod 6 and the piston assembly 2 are relatively fixed therebetween, so that initial rigidity is provided for the device; when the viscous damper faces larger earthquake and wind load, the fixed connection part between the support rod 6 and the piston assembly 2 is broken, the viscous damper starts to operate, damping is provided for the structure, and energy is dissipated; meanwhile, a cavity 7 is formed in the bottom of the cylinder body 1, a disc spring 8 is stacked in the cavity 7, when the earthquake grade is large, after the joint of the piston rod 12 and the support rod 6 is broken, the T-shaped structure at the lower end of the piston rod 12 is pressed down to push the sliding plate 9 to compress the disc spring 8, so that rigidity is provided for the damper, the rigidity is variable, and simultaneously, the restoring force of the damper can be increased when the disc spring 8 returns after the earthquake; in the post-earthquake reconstruction process, the damper can be reused only by re-welding the support rod 6 and the piston rod 12 in the damper, so that the production cost is saved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A self-resetting variable stiffness viscous damper comprising:
the damping device comprises a cylinder body (1), wherein through holes are respectively formed in two ends of the cylinder body (1), and damping medium is filled in the cylinder body (1);
the piston assembly (2) is coaxially sleeved inside the cylinder body (1) and is in sliding connection with the cylinder body (1); two ends of the piston assembly (2) extend out of the cylinder body (1) through the through holes respectively, and a reset spring (3) is fixed between one end of the piston assembly (2) and the outer wall of the cylinder body (1);
-a support assembly (4), the support assembly (4) comprising: the device comprises a plurality of hinge bases (5) and supporting rods (6), wherein the hinge bases (5) are fixed on the outer side wall of the cylinder body (1), the supporting rods (6) correspond to the hinge bases (5), one ends of the supporting rods (6) are rotationally connected with the hinge bases (5), and the other ends of the supporting rods (6) are fixedly connected with one ends of the piston assemblies (2) extending out of the cylinder body (1).
2. A self-resetting variable stiffness viscous damper as claimed in claim 1, characterized in that the end of the support rod (6) remote from the hinge seat (5) is welded to the end of the piston assembly (2) extending out of the cylinder (1).
3. The self-resetting variable-stiffness viscous damper according to claim 1, wherein a cavity (7) is formed in one end, far away from the reset spring (3), of the cylinder body (1), a plurality of disc springs (8) are sequentially stacked on the bottom surface, far away from one end of the cylinder body (1), of the cavity (7), a sliding plate (9) is fixedly connected to the top end of each disc spring (8), the sliding plate (9) is located below the bottom end of the piston assembly (2), and the sliding plate (9) is in sliding connection with the inner side wall of the cavity (7).
4. A self-resetting variable stiffness viscous damper as claimed in claim 3, characterized in that a plurality of stoppers (10) are fixed on the inner side wall of the chamber (7), and the stoppers (10) are located above the slide plate (9) and are abutted against the top surface of the slide plate (9).
5. A self-resetting variable stiffness viscous damper as claimed in claim 4, characterized in that said piston assembly (2) comprises: the piston comprises a piston head (11) and a piston rod (12), wherein the piston head (11) is slidably sleeved inside the cylinder body (1), a gap is reserved between the piston head (11) and the inner side wall of the cylinder body (1), and the piston rod (12) penetrates through the piston head (11) and is fixedly connected with the piston head (11).
6. The self-resetting variable stiffness viscous damper according to claim 5, wherein one end of the piston rod (12) is fixedly connected with a head connecting ring (13), and the other end of the piston rod (12) is of a T-shaped structure, and the T-shaped structure is located in the chamber (7).
7. A self-resetting variable stiffness viscous damper as claimed in claim 3, characterized in that a tail connecting ring (14) is fixedly connected to the outer side of one end of the chamber (7) away from the cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321839952.3U CN220248790U (en) | 2023-07-13 | 2023-07-13 | Self-resetting variable-rigidity viscous damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321839952.3U CN220248790U (en) | 2023-07-13 | 2023-07-13 | Self-resetting variable-rigidity viscous damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220248790U true CN220248790U (en) | 2023-12-26 |
Family
ID=89269477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321839952.3U Active CN220248790U (en) | 2023-07-13 | 2023-07-13 | Self-resetting variable-rigidity viscous damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220248790U (en) |
-
2023
- 2023-07-13 CN CN202321839952.3U patent/CN220248790U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11143265B2 (en) | SMA-STF based viscous damper | |
| CN112922182B (en) | Self-resetting variable-damping variable-rigidity viscoelastic and friction composite damper | |
| CN112161018B (en) | Infrastructure large-bearing multi-direction vibration isolating and reducing device and disaster prevention method thereof | |
| CN107686034B (en) | A kind of elevator hydraulic damping device | |
| CN109853370A (en) | A kind of continuous beam negative stiffness seismic isolation device | |
| CN114059445B (en) | Combined bridge vibration reduction and isolation support | |
| CN110159700B (en) | Energy conversion type buffer support | |
| CN110158803B (en) | Multidirectional damping and pulling-out resisting device of vibration isolation support and vibration isolation and damping method thereof | |
| CN111663433A (en) | Self-resetting SMA-viscous vibration reduction damper | |
| CN108443395B (en) | Double-output-rod parallel buffer and application thereof | |
| CN114197751A (en) | Damping energy-consuming type outrigger truss high-rise structure system | |
| CN220248790U (en) | Self-resetting variable-rigidity viscous damper | |
| CN110816452A (en) | Adjustable automobile collision energy absorption device | |
| CN116733891A (en) | Self-resetting variable-rigidity viscous damper | |
| CN117052008A (en) | Self-resetting energy-consumption three-dimensional combined seismic reduction and isolation support and mounting method thereof | |
| CN113356668A (en) | Novel replaceable shear wall damping support | |
| CN213174169U (en) | Beam column stabilizing member of assembled wood structure | |
| CN210768054U (en) | Building structure with shock absorption function | |
| CN111895034A (en) | Three-dimensional variable-rigidity limiting and shock-isolating device with damping | |
| CN209925498U (en) | SMA spring-STF viscous damper | |
| CN211548164U (en) | Steel frame beam column joint semi-active energy dissipation device capable of adjusting friction force | |
| CN216552506U (en) | Self-resetting seismic isolation support with vertical and multidirectional horizontal seismic isolation capabilities | |
| CN115949161A (en) | Intelligent damping device and method for assembly type frame shear wall | |
| CN211774738U (en) | Shape memory alloy negative stiffness damping device | |
| CN104895993B (en) | A kind of Multicarity recoil damping device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |