CN210369406U - Viscoelastic friction composite damper - Google Patents
Viscoelastic friction composite damper Download PDFInfo
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- CN210369406U CN210369406U CN201920928694.3U CN201920928694U CN210369406U CN 210369406 U CN210369406 U CN 210369406U CN 201920928694 U CN201920928694 U CN 201920928694U CN 210369406 U CN210369406 U CN 210369406U
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- friction
- viscoelastic
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- outer sleeve
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Abstract
The utility model discloses a viscoelastic friction composite damper, which comprises an outer sleeve, an inner sleeve, at least one friction unit and a viscoelastic unit; the friction unit and the inner sleeve are axially displaced relatively; relative displacement does not occur between the outer sleeve and the sleeve; the viscoelastic unit comprises a viscoelastic material fixedly arranged between the inner sleeve and the outer sleeve; the friction unit can consume energy when being displaced and has strong energy consumption capability, the damping of the viscoelastic unit is increased along with the increase of the displacement, and the defect that the damping force of the friction unit cannot be changed along with the change of the displacement is overcome, so that different energy consumption mechanisms of the viscoelastic damper and the friction damper are fully combined, the shock absorption capability of the structure is improved, and different design and use requirements are met.
Description
Technical Field
The utility model belongs to the technical field of the attenuator and specifically relates to a viscoelastic friction composite damper.
Background
Destructive earthquakes occur nearly thousands of times each year around the world, with one major earthquake resulting in hundreds of thousands of casualties and billions of dollars of economic loss. China is in two most active earthquake zones in the world, and casualties caused by earthquakes live at the first place in the world. The great damage and collapse of buildings in the earthquake are the direct causes of earthquake disasters. To reduce the seismic response of the structure, dampers may be added at certain locations of the structure to increase the dissipation capacity of the structure for energy.
Friction dampers and viscoelastic dampers are two types of dampers used to reduce the seismic response of structures. The friction damper dissipates vibration energy by utilizing friction energy consumption of the friction surface, the friction force is independent of displacement, and the output force of the friction damper cannot be changed under different earthquake conditions. When the sliding force is set too high, the device may not slide or cannot generate good energy consumption effect due to small sliding process; when the slip force is set too low, the required energy dissipation capability cannot be achieved in heavy earthquakes. The viscoelastic damper consumes energy by using the deformation of the viscoelastic material. The output force of the viscoelastic damper changes along with the displacement, and the two dampers are combined by utilizing different energy consumption mechanisms of the two dampers, so that the requirement of structural shock absorption can be better met.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the problem that prior art exists, the utility model provides a viscoelastic friction composite damper combines the different power consumption mechanism of two kinds of dampers of friction damper and elastic damper, better realization structure absorbing demand.
The technical scheme is as follows: in order to achieve the above purpose, the utility model can adopt the following technical proposal: a viscoelastic-friction composite damper comprises an outer sleeve, an inner sleeve, a friction unit and a viscoelastic unit;
the inner sleeve comprises a first connecting part, a second connecting part and a third connecting part in sequence from top to bottom according to different longitudinal section shapes; the longitudinal section shapes of the first connecting part and the third connecting part are rectangular, and the longitudinal section shape of the second connecting part is circular; the inner sleeve is arranged in the middle of the outer sleeve and divides the outer sleeve into two parts;
the friction unit comprises friction materials arranged between the first connecting part and the outer sleeve and between the third connecting part and the outer sleeve; the first connecting part and the third connecting part are respectively provided with a slotted hole along the axial direction; the friction unit and the inner sleeve are axially and relatively displaced along the strip-shaped slotted hole; the friction unit and the outer sleeve do not generate relative displacement;
the viscoelastic unit comprises a viscoelastic material fixedly arranged between the second connecting part and the outer sleeve.
The friction unit further comprises a spring unit, a bolt and a nut matched with the bolt; the bolt penetrates through the outer sleeve, the friction material, the slotted hole of the inner sleeve and the spring unit; the tail end is provided with a nut; the friction unit increases or reduces the pretightening force through the screwing and loosening between the bolt and the nut, so that the friction force between the friction material and the inner sleeve is adjusted.
Gaskets are arranged on two sides of the friction unit; the functions of increasing the contact surface and dispersing the pre-tightening force of the bolt are achieved.
Furthermore, the gasket is arranged between the outer sleeve and the bolt and between the spring unit and the nut.
More preferably, the friction material is at least one of polytetrafluoroethylene, brass plate and polymer composite material.
The spring unit is formed by overlapping a plurality of belleville springs; the elastic deformation of the belleville spring compensates the loss of the friction material, and the constant friction force is kept.
Has the advantages that: the utility model has the advantages of it is following:
(1) different energy consumption mechanisms of the viscoelastic damper and the friction damper are fully combined, so that the shock absorption capacity of the structure is improved, and the shock absorption requirement is met;
(2) the friction unit can consume energy when being displaced and has strong energy consumption capability, the damping of the viscoelastic unit is increased along with the increase of the displacement, and the defect that the damping force of the friction unit cannot be changed along with the change of the displacement is overcome. The two are combined to adapt to different design and use requirements.
Drawings
Fig. 1 is a schematic structural view of the viscoelastic-friction composite damper according to the present invention;
FIG. 2 is a schematic view of the section A-A of the viscoelastic-friction composite damper of FIG. 1;
FIG. 3 is a schematic view of the cross-sectional B-B structure of the viscoelastic-friction composite damper of FIG. 1;
FIG. 4 is an enlarged view of the portion C of FIG. 3;
fig. 5 is a schematic view of the structure of the inner sleeve of the viscoelastic-friction composite damper of the present invention.
Detailed Description
Referring to fig. 1-5, the present invention discloses a viscoelastic friction composite damper, which comprises an outer sleeve 1, an inner sleeve 2, three friction units distributed evenly, and a viscoelastic unit;
the inner sleeve 2 sequentially comprises a first connecting part 21, a second connecting part 22 and a third connecting part 23 from top to bottom in different longitudinal section shapes; the first connecting part 21 and the third connecting part 23 are rectangular in longitudinal section, and the second connecting part 22 is circular in longitudinal section; the inner sleeve 2 is arranged in the middle of the outer sleeve 1 and divides the outer sleeve 1 into two parts, and a gap is reserved in the middle;
the friction unit comprises a friction material 31, a spring unit 32, a bolt 33, a nut 34 matched with the bolt 33 and a gasket 35; the spring unit 32 is formed by overlapping a plurality of belleville springs; the elastic deformation of the belleville spring compensates the loss of the friction material, and the constant friction force is kept.
The friction material 31 is arranged between the first connecting part 21 and the outer sleeve 1, and is also arranged between the third connecting part 23 and the outer sleeve 1; the friction material 31 is made of polytetrafluoroethylene, and the friction coefficient of the surface of the outer sleeve 1 in contact with the friction material 31 is increased by processes such as shot blasting and the like, so that relative displacement does not occur between the outer sleeve and the friction material;
the first connecting part 21 and the third connecting part 2 are respectively provided with a slotted hole 24 along the axial direction; the bolt 33 sequentially penetrates through the outer sleeve 1, the friction material 31, the slotted hole 24, the friction material 31, the outer sleeve 1 and the spring unit 32; the end is a nut 34; the friction unit and the inner sleeve 2 are relatively displaced along the strip-shaped slotted hole 24 along the axial direction; the friction unit increases or decreases the pre-tightening force through the tightening and loosening between the bolt 33 and the nut 34, thereby adjusting the friction force between the friction material 31 and the inner sleeve 2. The gasket 35 is arranged between the outer sleeve 1 and the bolt 33 and between the spring unit 32 and the nut 34; the functions of increasing the contact surface and dispersing the pre-tightening force of the bolt are achieved.
The viscoelastic unit comprises a viscoelastic material 41 fixedly arranged between the second connecting part 22 and the outer sleeve 1; the viscoelastic material 41 is fixed integrally with the outer tube 1 and the inner tube 2 by a vulcanization process.
The sizes of all parts of the composite damper and the pretightening force of the bolt are determined through tests and calculation according to the requirements of actual products.
The working principle is as follows:
the utility model discloses at the during operation that carries out, distribute outer tube 1 through connecting elements, interior sleeve pipe 2 is connected from top to bottom with the structure of using the object, when taking place relative displacement between outer tube 1 and interior sleeve pipe 2, viscoelastic unit is because viscoelastic material 41's shear deformation product damping force, friction unit is because the relative slip between interior sleeve pipe 2 and friction material 31 produces frictional force, friction unit takes place the displacement and can consume energy and the power consumption can be strong, viscoelastic unit damping increases along with the displacement increase, it can not be along with the not enough of displacement size change to compensate friction unit damping force, thereby the different power consumption mechanism of viscous-elastic attenuator and friction damper fully combines, improve structure shock-absorbing capacity and satisfy different design user demand.
Claims (6)
1. A viscoelastic friction composite damper is characterized by comprising an outer sleeve (1), an inner sleeve (2), at least one friction unit and a viscoelastic unit;
the inner sleeve (2) sequentially comprises a first connecting part (21), a second connecting part (22) and a third connecting part (23) from top to bottom according to different longitudinal section shapes; the longitudinal section of the first connecting part (21) and the third connecting part (23) is rectangular, and the longitudinal section of the second connecting part (22) is circular; the inner sleeve (2) is arranged in the middle of the outer sleeve (1) and divides the outer sleeve (1) into two parts;
the friction unit comprises friction materials (31) arranged between the first connecting part (21) and the outer sleeve (1) and between the third connecting part (23) and the outer sleeve (1); slotted holes (24) are respectively formed in the first connecting part (21) and the third connecting part (23) along the axial direction; the friction unit and the inner sleeve (2) are relatively displaced along the strip-shaped slotted hole (24) along the axial direction; the friction unit and the outer sleeve (1) do not generate relative displacement;
the viscoelastic unit comprises a viscoelastic material (41) fixedly arranged between the second connecting part (22) and the outer sleeve (1).
2. A viscoelastic-friction composite damper as set forth in claim 1 wherein: the friction unit further comprises a spring unit (32), a bolt (33) and a nut (34) matched with the bolt (33); the bolt (33) penetrates through the outer sleeve (1), the friction material (31), the slotted hole (24) of the inner sleeve (2) and the spring unit (32); the tail end is provided with a nut (34); the adjusting nut (34) adjusts the friction force of the friction unit.
3. A viscoelastic-friction composite damper as set forth in claim 2 wherein: and gaskets (35) are arranged on two sides of the friction unit.
4. A viscoelastic-friction composite damper as set forth in claim 3 wherein: the gasket (35) is arranged between the outer sleeve (1) and the bolt (33) and between the spring unit (32) and the nut (34).
5. A viscoelastic-friction composite damper as set forth in claim 1 wherein: the friction material (31) is at least one of polytetrafluoroethylene, a brass plate and a polymer composite material.
6. A viscoelastic-friction composite damper as set forth in claim 2 wherein: the spring unit (32) is formed by superposing a plurality of belleville springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928694.3U CN210369406U (en) | 2019-06-20 | 2019-06-20 | Viscoelastic friction composite damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928694.3U CN210369406U (en) | 2019-06-20 | 2019-06-20 | Viscoelastic friction composite damper |
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| Publication Number | Publication Date |
|---|---|
| CN210369406U true CN210369406U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920928694.3U Active CN210369406U (en) | 2019-06-20 | 2019-06-20 | Viscoelastic friction composite damper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309809A (en) * | 2021-04-13 | 2021-08-27 | 中国电力科学研究院有限公司 | Damping device and design method thereof |
| CN115288314A (en) * | 2022-08-18 | 2022-11-04 | 北京工业大学 | Multi-stage energy consumption self-resetting damping device |
-
2019
- 2019-06-20 CN CN201920928694.3U patent/CN210369406U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309809A (en) * | 2021-04-13 | 2021-08-27 | 中国电力科学研究院有限公司 | Damping device and design method thereof |
| CN115288314A (en) * | 2022-08-18 | 2022-11-04 | 北京工业大学 | Multi-stage energy consumption self-resetting damping device |
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