CN211114191U - Double-order friction damper - Google Patents
Double-order friction damper Download PDFInfo
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- CN211114191U CN211114191U CN201920928692.4U CN201920928692U CN211114191U CN 211114191 U CN211114191 U CN 211114191U CN 201920928692 U CN201920928692 U CN 201920928692U CN 211114191 U CN211114191 U CN 211114191U
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Abstract
The utility model discloses a double-step friction damper, which comprises a central plate, a first friction unit and a second friction unit; the transverse section of the central plate is of a cross structure, and strip-shaped slotted holes are respectively formed in two axial sides of the central plate; the first friction unit and the second friction unit perform axial relative friction movement with the central plate along the slotted hole; the friction force between the first friction unit, the second friction unit and the center plate is different; the utility model discloses utilize the principle of two-step friction damper segmentation work, the frictional force under the control damper corresponds different earthquake loads can effectual realization friction damper be exerted oneself and is changed along with the earthquake effect, satisfies the absorbing design demand of structure.
Description
Technical Field
The utility model belongs to the technical field of the attenuator and specifically relates to a two-step friction damper.
Background
In recent years, with frequent earthquakes in the global scope and the development requirement of increasingly improved engineering structures, the structure damping passive control theory is widely applied, and dampers can be additionally arranged at certain parts of a structure to increase the energy dissipation capacity of the structure and reduce or even eliminate the damage of the main structure.
The friction damper is a control device which utilizes sliding friction force to do work and dissipate energy, and plays a role in energy dissipation and shock absorption on a structure. The energy dissipation and damping device is simple in structure, convenient to install and good in energy dissipation performance, and is a common energy dissipation and damping device in engineering.
But the existing friction type damper has certain defects, the damping force of the friction damper is relatively fixed, and different damping forces are needed in different earthquake stages for structural shock absorption, so that the existing friction damper cannot meet the requirement.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the problem that prior art exists, the utility model provides a two-step friction damper, the frictional force under the control damper corresponds different earthquake loads satisfies the damping force demand in different earthquake stages.
The technical scheme is as follows: in order to achieve the above purpose, the utility model can adopt the following technical proposal: a dual-step friction damper comprises a center plate, a first friction unit and a second friction unit; the transverse section of the central plate is of a cross structure, and strip-shaped slotted holes are respectively formed in two axial sides of the central plate; the first friction unit and the second friction unit are respectively arranged at two axial sides of the central plate and perform axial relative friction motion with the central plate along the slotted hole;
the contact surface of the first friction unit and the central plate is provided with a first friction material and at least one fastening unit; the contact surface of the second friction unit and the central plate is provided with a second friction material and at least one fastening unit;
the fastening unit fastens the friction force between the first friction unit or the second friction unit and the central plate; the friction force between the first friction unit and the central plate is different from the friction force between the second friction unit and the central plate.
Furthermore, the first friction unit further comprises a first end plate positioned at the end part and two first outer side plates vertically and fixedly connected with the first end plate; the two first outer side plates extend axially, and a gap is formed between the two first outer side plates to form an axial sliding chute; the central plate and the first friction unit form relative motion in the axial sliding groove; the first friction materials are respectively arranged between the central plate and the two first outer side plates.
Furthermore, the second friction unit also comprises a second end plate positioned at the end part and two second outer side plates vertically and fixedly connected with the second end plate; the two second outer side plates extend axially, and a gap is formed between the two second outer side plates to form an axial sliding chute; the central plate and the second friction unit form relative motion in the axial sliding groove; the second friction materials are respectively arranged between the central plate and the two second outer side plates.
The fastening unit comprises a fastening bolt, a fastening nut and a spring unit; the fastening bolt is matched with the fastening nut;
when the first friction unit is fastened and adjusted with the central plate, the fastening bolt penetrates through the spring unit and the slotted hole to fasten the central plate, the first outer side plates on two sides and the first friction material;
when the second friction unit is fastened and adjusted with the central plate, the fastening bolt penetrates through the spring unit and the slotted hole to fasten the central plate, the second outer side plates on two sides and the second friction material;
the pretightening force is increased or reduced through the screwing and loosening between the bolt and the nut, so that the friction force between the friction material and the central plate during relative movement is adjusted.
The fastening unit further includes a spacer disposed between the fastening bolt and the fastening nut; the functions of increasing the contact surface and dispersing the pre-tightening force of the bolt are achieved.
The fastening unit also comprises a limiting flange arranged between the fastening bolt and the spring unit; the function of limiting protection is achieved.
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.
More preferably, the first friction material and the second friction material are at least one of polytetrafluoroethylene, brass plate and polymer composite material.
Has the advantages that: the utility model has the advantages of it is following: due to the fact that the dampers corresponding to different earthquake loads have different displacements, the friction force of the dampers corresponding to different earthquake loads is controlled by means of the principle that the two-order friction dampers work in a segmented mode, the fact that the force of the friction dampers changes along with the earthquake action can be effectively achieved, and the design requirement of structural shock absorption is met.
Drawings
FIG. 1 is a schematic view of a dual-step friction damper of the present invention;
FIG. 2 is a schematic cross-sectional view A-A of the dual-stage friction damper of FIG. 1;
fig. 3 is a schematic view of the center plate of the dual-step friction damper according to the present invention.
Detailed Description
Referring to fig. 1 to 3, the present invention discloses a dual-step friction damper, which includes a first friction unit, a second friction unit and a central plate 3; the transverse section of the central plate 3 is of a cross structure, and two strip-shaped slotted holes 31 are respectively formed in two axial sides of the central plate; the first friction unit and the second friction unit are respectively arranged at two axial sides of the central plate 3 and perform axial relative friction movement with the central plate 3 along the slotted hole 31;
the first friction unit comprises a first end plate 12 positioned at the end part and two first outer side plates 13 vertically and fixedly connected with the first end plate 12; the two first outer side plates 13 extend axially and are provided with gaps in the middle to form axial sliding grooves; the central plate 3 and the first friction unit form relative movement in the axial sliding groove; the contact surfaces of the two first outer side plates 13 and the central plate 3 are both provided with first friction materials 11, the first friction materials 11 are made of polytetrafluoroethylene, and the friction coefficients of the surfaces of the two first outer side plates 13, which are in contact with the first friction materials 11, are increased through processes such as shot blasting and the like so that relative displacement does not occur between the surfaces; relative displacement occurs between the center plate 3 and the first friction material 11, generating a frictional force. The first friction unit performs relative friction movement with the central plate 3 in the axial direction along the slotted hole 31;
the second friction unit comprises a second end plate 22 positioned at the end part and two second outer side plates 22 vertically and fixedly connected with the second end plate 22; the two second outer side plates 22 extend axially and are provided with gaps in the middle to form axial sliding grooves; the central plate 3 and a second friction unit form relative motion in the axial sliding groove; the contact surfaces of the two second outer plates 23 and the central plate 3 are both provided with second friction materials 21, the second friction materials 21 are made of polytetrafluoroethylene, and the friction coefficients of the contact surfaces of the two second outer plates 23 and the second friction materials 21 are increased through processes such as shot blasting and the like so that relative displacement does not occur between the two second outer plates 23 and the second friction materials 21; relative displacement occurs between the center plate 3 and the second friction material 21, generating a frictional force. The second friction unit performs relative friction movement with the central plate 3 in the axial direction along the slotted hole 31;
two fastening units 4 are arranged between the first friction unit and the central plate 3 and respectively penetrate through two slotted holes 31 on the corresponding side of the central plate 3, four fastening units 4 are arranged between the second friction unit and the central plate 3 and respectively penetrate through two slotted holes 31 on the corresponding side of the central plate 3, and two of the slotted holes 31 are arranged side by side.
The fastening unit 4 fastens the first friction unit or the second friction unit and the central plate 3 to adjust the friction force between the first friction unit and the central plate 3, the friction force between the first friction unit and the central plate 3 and the friction force between the second friction unit and the central plate 3 are different, the pretightening force applied by the fastening unit 4 of the first friction unit is smaller than that of the second friction unit, when the displacement of the damper is smaller, the first friction unit firstly slides to generate smaller friction force, and when the displacement is increased and exceeds the distance L between the first outer side plate 13 and the central plate 3 and the first end plate 12, the second friction unit is operated to generate larger friction force.
The fastening unit 4 includes a fastening bolt 41, a fastening nut 42, and a spring unit 43; the fastening bolt 41 and the fastening nut 42 are matched; the spring unit 32 is formed by stacking 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.
When the first friction unit is fastened and adjusted with the center plate 3, the fastening bolt 41 passes through the spring unit 43 and the slotted hole 31 to fasten the center plate 3, the first outer side plates 13 on both sides and the first friction material 11; when the second friction unit is fastened and adjusted with the center plate 3, the fastening bolt 41 passes through the spring unit 43 and the slotted hole 31 to fasten the center plate 3, the second outside plates 22 on both sides and the second friction material 21; the pretightening force is increased or reduced through the screwing and loosening between the bolt and the nut, so that the friction force between the friction material and the central plate during relative movement is adjusted.
The fastening unit 4 further includes a spacer 44 provided between the fastening bolt 41 and the fastening nut 42; the functions of increasing the contact surface and dispersing the pre-tightening force of the bolt are achieved; the fastening unit 4 comprises a limiting flange 45 arranged between the fastening bolt 41 and the spring unit 43; the function of limiting protection is achieved.
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 when carrying out the during operation, distribute through connecting elements and be connected first end plate 12, second end plate 22 from top to bottom with the structure of using the object, when the earthquake takes place, relative displacement takes place from top to bottom for building structure, drive the attenuator and take place relative slip and produce frictional force, there is frictional force in frictional force between first frictional element and the well core plate 3 and the frictional force between second frictional element and the well core plate 3. first frictional element is little through the relative second frictional element of pretightning force that fastening unit 4 applyed, and when the attenuator displacement is less, first frictional element slides at first and produces less frictional force, when the displacement increase, when exceeding distance L between first lateral plate 13 and well core plate 3 and the first end plate 12, second frictional element gets into work, produces bigger frictional force to the demand that the friction attenuator provided the required different damping forces in different earthquake stages has been realized.
Claims (8)
1. A double-step friction damper is characterized by comprising a central plate (3), a first friction unit and a second friction unit; the transverse section of the central plate (3) is of a cross structure, and strip-shaped slotted holes (31) are respectively formed in two axial sides of the central plate; the first friction unit and the second friction unit are respectively arranged on two axial sides of the central plate (3) and perform axial relative friction motion with the central plate (3) along the slotted hole (31);
the contact surface of the first friction unit and the central plate (3) is provided with a first friction material (11) and at least one fastening unit (4); the contact surface of the second friction unit and the central plate (3) is provided with a second friction material (21) and at least one fastening unit (4);
the fastening unit (4) fastens the first friction unit or the second friction unit and the central plate (3) to adjust the friction force between the first friction unit and the central plate; the friction force between the first friction unit and the central plate (3) is different from the friction force between the second friction unit and the central plate (3).
2. The dual stage friction damper as recited in claim 1, wherein: the first friction unit also comprises a first end plate (12) positioned at the end part and two first outer side plates (13) vertically and fixedly connected with the first end plate (12); the two first outer side plates (13) extend axially and are provided with gaps in the middle to form axial sliding grooves; the central plate (3) and the first friction unit form relative motion in the axial sliding groove; the first friction materials (11) are respectively arranged between the central plate (3) and the two first outer side plates (13).
3. The dual stage friction damper as recited in claim 1, wherein: the second friction unit also comprises a second end plate (22) positioned at the end part and two second outer side plates (23) vertically and fixedly connected with the second end plate (22); the two second outer side plates (23) extend axially and are provided with gaps in the middle to form axial sliding grooves; the central plate (3) and a second friction unit form relative motion in the axial sliding groove; the second friction materials (21) are respectively arranged between the central plate (3) and the two second outer side plates (23).
4. The dual stage friction damper as recited in claim 2 or 3, wherein: the fastening unit (4) comprises a fastening bolt (41), a fastening nut (42) and a spring unit (43); the fastening bolt (41) is matched with the fastening nut (42);
when the first friction unit and the central plate (3) are fastened and adjusted, a fastening bolt (41) passes through a spring unit (43) and a slotted hole (31) to fasten the central plate (3), the first outer side plates (13) on two sides and the first friction material (11);
when the second friction unit is fastened and adjusted with the center plate (3), a fastening bolt (41) passes through the spring unit (43) and the slotted hole (31) to fasten the center plate (3), the second outside plates (23) on both sides and the second friction material (21).
5. The dual stage friction damper as recited in claim 4, wherein: the fastening unit (4) further comprises a washer (44) arranged between the fastening bolt (41) and the fastening nut (42).
6. The dual stage friction damper as recited in claim 4, wherein: the fastening unit (4) further comprises a limiting flange (45) arranged between the fastening bolt (41) and the spring unit (43).
7. The dual stage friction damper as recited in claim 4, wherein: the spring unit (43) is formed by superposing a plurality of belleville springs.
8. The dual stage friction damper as recited in claim 1, wherein: the first friction material (11) and the second friction material (21) are at least one of polytetrafluoroethylene, brass plates and polymer composite materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928692.4U CN211114191U (en) | 2019-06-20 | 2019-06-20 | Double-order friction damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928692.4U CN211114191U (en) | 2019-06-20 | 2019-06-20 | Double-order friction damper |
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| CN211114191U true CN211114191U (en) | 2020-07-28 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343959A (en) * | 2020-10-26 | 2021-02-09 | 株洲时代新材料科技股份有限公司 | Method for improving transverse stability of air spring and air spring |
| CN113123478A (en) * | 2021-03-09 | 2021-07-16 | 河北工业大学 | Friction unit of supporting structure and friction energy dissipation supporting structure with multiple friction units connected in series |
| CN113123523A (en) * | 2021-04-15 | 2021-07-16 | 重庆大学 | Connecting beam structure capable of recovering energy consumption and enhancing energy consumption capacity |
| CN113123479A (en) * | 2021-03-09 | 2021-07-16 | 河北工业大学 | Friction unit and self-resetting type three-series friction energy dissipation supporting structure |
| CN113585849A (en) * | 2021-08-11 | 2021-11-02 | 四川大学 | Two-stage friction damper |
| CN115075417A (en) * | 2022-07-19 | 2022-09-20 | 震安科技股份有限公司 | Double-step friction damper |
-
2019
- 2019-06-20 CN CN201920928692.4U patent/CN211114191U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343959A (en) * | 2020-10-26 | 2021-02-09 | 株洲时代新材料科技股份有限公司 | Method for improving transverse stability of air spring and air spring |
| CN113123478A (en) * | 2021-03-09 | 2021-07-16 | 河北工业大学 | Friction unit of supporting structure and friction energy dissipation supporting structure with multiple friction units connected in series |
| CN113123479A (en) * | 2021-03-09 | 2021-07-16 | 河北工业大学 | Friction unit and self-resetting type three-series friction energy dissipation supporting structure |
| CN113123523A (en) * | 2021-04-15 | 2021-07-16 | 重庆大学 | Connecting beam structure capable of recovering energy consumption and enhancing energy consumption capacity |
| CN113585849A (en) * | 2021-08-11 | 2021-11-02 | 四川大学 | Two-stage friction damper |
| CN113585849B (en) * | 2021-08-11 | 2022-07-26 | 四川大学 | Two-stage friction damper |
| CN115075417A (en) * | 2022-07-19 | 2022-09-20 | 震安科技股份有限公司 | Double-step friction damper |
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