CN112609855A - One-way self-resetting adjustable friction energy dissipation damper and use method thereof - Google Patents
One-way self-resetting adjustable friction energy dissipation damper and use method thereof Download PDFInfo
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- CN112609855A CN112609855A CN202011458499.2A CN202011458499A CN112609855A CN 112609855 A CN112609855 A CN 112609855A CN 202011458499 A CN202011458499 A CN 202011458499A CN 112609855 A CN112609855 A CN 112609855A
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- sliding shaft
- damper
- resetting
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- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 8
- 238000013016 damping Methods 0.000 claims abstract description 30
- 238000005265 energy consumption Methods 0.000 claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 229920001971 elastomer Polymers 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
Abstract
The invention discloses a one-way self-resetting adjustable friction energy dissipation damper, which comprises a friction sleeve, a friction damping part, an elastic body, a fixed end and an end cover, wherein the friction sleeve is arranged on the friction damping part; a usage of the one-way self-reset adjustable friction energy-consumption damper is disclosed, which is used for one-way reset and friction force adjustment. The one-way self-resetting adjustable friction energy-consumption damper provided by the invention senses the displacement reaction of a controlled structure by utilizing the elastic body at one end of the friction sleeve, and further changes the positive pressure between the friction unit and the inner wall of the friction sleeve by extruding the friction unit so as to automatically adjust the sliding friction force, thereby meeting the vibration reduction requirements of strong vibration and weak vibration of the structure; meanwhile, the self-resetting adjustable friction damper has a self-resetting function, can be repeatedly used for many times, saves the time and economic cost for reinforcing and repairing after disasters, and is convenient for quickly recovering the use function of the structure.
Description
Technical Field
The invention relates to a one-way self-resetting friction energy consumption adjustable damper and a using method thereof, belonging to the technical field of shock absorption.
Background
The friction damper is a damper with stable performance and strong energy consumption capability, can convert energy input into a building structure into heat energy in a sliding friction mode to protect a main body structure, and mainly utilizes friction between metal or friction between metal and nonmetal to generate damping. The normal pressure and friction coefficient of the friction surface of the common friction damper can not be changed by self, namely, the sliding friction force is kept unchanged basically. The most critical issue in engineering applications for such constant friction dampers is how to determine the appropriate sliding friction. On the other hand, the friction damper does not have a self-resetting function and does not meet the requirements of economy and repeated use.
Disclosure of Invention
The invention provides a one-way self-resetting adjustable friction energy dissipation damper and a using method thereof, which are used for realizing one-way resetting through the damper and further adjusting friction.
The technical scheme of the invention is as follows: a one-way self-resetting adjustable friction energy dissipation damper comprises a friction sleeve 1, a friction damping part, an elastic body 5, a fixed end 7, a stay cable 8 and an end cover 9;
the friction sleeve 1 is of a cylindrical structure with an opening at one end, a fixed end 7 is arranged on the outer side of the closed end, and the opening end is connected with an end cover 9;
the friction damping part comprises a sliding shaft 2, a pressurizing block 3, a friction unit 4 and a nut 6; the sliding shaft 2 penetrates through the two pressurizing blocks 3 and the friction unit 4 clamped by the two pressurizing blocks 3, the pressurizing blocks 3 and the friction unit 4 are fixed through the sliding shaft 2 and the nut 6, one end of the sliding shaft 2 is in contact with the inner side face of the closed end of the friction sleeve 1, the other end of the sliding shaft 2 is connected with one end of a first inhaul cable 8, and the other end of the first inhaul cable 8 penetrates out of an opening of the end cover 9;
the elastic body 5 is arranged between the open end of the friction sleeve 1 and the pressurizing block 3;
the fixed end 7 is a connecting block with a hole and is used for connecting the friction sleeve 1 with one end of another inhaul cable 8.
The sliding shaft 2 is a cylindrical solid rod, and the central axis of the sliding shaft is superposed with the central axis of the friction sleeve 1; the pressurizing block 3 is a circular plate, the center of the pressurizing block is provided with a hole, and the pressurizing block is used for the sliding shaft 2 to penetrate through; the friction unit 4 is a cylindrical rubber friction unit, and a circular hole is formed in the center of the friction unit and used for the sliding shaft 2 to penetrate through.
A use method of a one-way self-reset adjustable friction energy dissipation damper,
for one-way reset: assuming that the initial vibration direction is horizontal rightward movement, the unidirectional self-resetting adjustable friction energy-consumption damper is pulled rightwards, the sliding shaft 2 in the pulled unidirectional self-resetting adjustable friction energy-consumption damper generates rightward displacement L as a whole, then the vibration direction is leftward, the structural stress direction is changed to be leftward, the unidirectional self-resetting adjustable friction energy-consumption damper is free from external force, and the friction damping part is reset: the right pressurizing block 3 in the friction damping part is pushed by the elastic body 5, and the friction damping part starts to move leftwards to realize resetting;
the device is used for adjusting the friction force, and comprises a pre-vibration adjustment and a post-vibration adjustment; adjusting before shaking: the sliding shaft 2 penetrates through a hole of the friction unit 4, and the pressurizing block 3 and the friction unit 4 adjust proper friction force through the change of the torque of the sliding shaft 2 and the nut 6; adjusting after shaking: when the sliding shaft 2 is pulled to move to the right, the left end pressurizing block 3 is forced to the right by the nut 6 and the sliding shaft 2, and the right side elastic body 5 is squeezed to apply a leftward force to the right side pressurizing block 3.
The invention has the beneficial effects that: the one-way self-resetting adjustable friction energy-consumption damper provided by the invention senses the displacement reaction of a controlled structure by utilizing the elastic body at one end of the friction sleeve, and further changes the positive pressure between the friction unit and the inner wall of the friction sleeve by extruding the friction unit so as to automatically adjust the sliding friction force, thereby meeting the vibration reduction requirements of strong vibration and weak vibration of the structure; meanwhile, the self-resetting adjustable friction damper has a self-resetting function, can be repeatedly used for many times, saves the time and economic cost for reinforcing and repairing after disasters, and is convenient for quickly recovering the use function of the structure.
Drawings
FIG. 1 is a schematic structural view of a one-way self-resetting adjustable friction energy-consuming damper device according to the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along line C-C of FIG. 1;
FIG. 5 is a hysteresis curve diagram of a self-resetting adjustable friction damper in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of an installation of a one-way self-resetting adjustable friction dissipative damper;
FIG. 7 is a schematic view of a slide shaft;
the reference numbers in the figures are: 1-friction sleeve, 2-sliding shaft, 3-pressurizing block, 4-friction unit, 5-elastomer, 6-nut, 7-fixed end, 8-inhaul cable, 9-end cover, 10-one-way self-resetting adjustable friction energy-consuming damper A, 11-one-way self-resetting adjustable friction energy-consuming damper B, wherein X axis is horizontal displacement, and Y is restoring force of the damper.
Detailed Description
Example 1: as shown in fig. 1-7, a one-way self-resetting adjustable friction energy dissipation damper comprises a friction sleeve 1, a friction damping part, an elastic body 5, a fixed end 7, a stay cable 8 and an end cover 9;
the friction sleeve 1 is of a cylindrical structure (a steel cylinder) with an opening at one end, a welded fixed end 7 is arranged on the outer side of the closed end, and the open end is connected with an end cover 9 (the outer side of the open end is provided with threads, the end cover 9 is also provided with threads, and the end cover 9 can be screwed on the sleeve 1);
the friction damping part comprises a sliding shaft 2, a pressurizing block 3, a friction unit 4 and a nut 6; the sliding shaft 2 penetrates through the two pressurizing blocks 3 and the friction unit 4 clamped by the two pressurizing blocks 3, the pressurizing blocks 3 and the friction unit 4 are fixed through the sliding shaft 2 and the nut 6, one end of the sliding shaft 2 is in contact with the inner side face of the closed end of the friction sleeve 1, the other end (namely, the end close to the elastic body 5) of the sliding shaft 2 is connected with one end of a first inhaul cable 8, and the other end of the first inhaul cable 8 penetrates out of an opening of the end cover 9;
the elastic body 5 can adopt a spring, is used for generating deformation and consuming vibration energy together with the damping part, and is arranged between the opening end of the friction sleeve 1 and the pressurizing block 3 by restoring the damping mechanism to the original position by means of the elasticity of the elastic body after the vibration is finished;
the fixed end 7 is a connecting block with a hole and is used for connecting the friction sleeve 1 with one end of another inhaul cable 8.
Further, the sliding shaft 2 may be a cylindrical solid rod (cylindrical solid steel rod), the central axis of which coincides with the central axis of the friction sleeve 1 and can slide relative to the bottom surface of the opening of the friction sleeve 1, a section of the sliding shaft 2 close to the pressurizing block 3 has external threads, two nuts 6 are respectively screwed on the section of the sliding shaft 2 having the external threads, and the nuts 6 are screwed and unscrewed to adjust the friction force of the friction damping component; the pressurizing block 3 is a circular plate (a circular steel thick plate), and a hole is formed in the center of the pressurizing block and is used for the sliding shaft 2 to penetrate through; the friction unit 4 is a cylindrical rubber friction unit, and a circular hole is formed in the center of the friction unit and is used for the sliding shaft 2 to penetrate through; the outer diameter of the friction unit 4 is consistent with the radial dimension of the friction sleeve 1, energy is dissipated through friction between the side face of the friction unit 4 and the inner side face of the friction sleeve 1 in vibration, the sliding shaft 2 penetrates through a hole of the friction unit 4, and the pressurizing block 3 and the friction unit 4 can adjust proper friction force through change of torque of the sliding shaft 2 and the nut 6; the friction force of the friction damping part is changed under the pressure of the elastic body 5 during the vibration process (namely, one adjustment is the torque adjustment through the sliding shaft 2 and the nut 6 before the vibration, and in addition, the friction damping part is also changed by the pressure of the spring during the vibration).
The two nuts 6 are adjusting nuts, the two nuts 6 are respectively screwed on the sections of the sliding shaft 2 with the external threads, and the friction force of the damping mechanism is adjusted by screwing and unscrewing the nuts 6;
two pull cables 8, one is connected with the fixed end 7, and the other is connected with the part of the sliding shaft 2 close to the elastic body 5; the stay cable is only stressed by tension and is not stressed, and the connection of the friction damper and the stay cable ensures that the whole device is only stressed by tension;
the end cover 9 is provided with threads, the outer side of the friction sleeve 1 is also provided with threads, and the end cover 9 can be screwed on the friction sleeve 1.
A use method of a one-way self-reset adjustable friction energy dissipation damper,
for one-way reset: assuming that the initial vibration direction is horizontal rightward movement, the unidirectional self-resetting adjustable friction energy-consumption damper is pulled rightwards, the sliding shaft 2 in the pulled unidirectional self-resetting adjustable friction energy-consumption damper generates rightward displacement L as a whole, then the vibration direction is leftward, the structural stress direction is changed to be leftward, the unidirectional self-resetting adjustable friction energy-consumption damper is free from external force, and the friction damping part is reset: the right pressurizing block 3 in the friction damping part is pushed by the elastic body 5, and the friction damping part starts to move leftwards to realize resetting;
the device is used for adjusting the friction force, and comprises a pre-vibration adjustment and a post-vibration adjustment; adjusting before shaking: the sliding shaft 2 penetrates through a hole of the friction unit 4, and the pressurizing block 3 and the friction unit 4 adjust proper friction force through the change of the torque of the sliding shaft 2 and the nut 6; adjusting after shaking: when the sliding shaft 2 is pulled to move to the right, the left end pressurizing block 3 is forced to the right by the nut 6 and the sliding shaft 2, and the right side elastic body 5 is squeezed to apply a leftward force to the right side pressurizing block 3.
The specific use mode of the invention is as follows:
in fig. 1, the one-way self-resetting adjustable friction energy-consuming damper is in an initial balance position, and the elastic body 5 generates a pre-tightening force, namely a certain pre-compression amount, by the pressure applied by the end cover 9. The friction damping member in the initial state adjusts the appropriate friction force by changing the torque of the slide shaft 2 and the nut 6. The damper begins to move after being stressed, and the seismic energy is dissipated: when the sliding shaft 2 moves rightwards under the action of pulling force, the left end pressurizing block 3 is subjected to the rightwards force provided by the nut 6 and the sliding shaft 2, the elastic body 5 on the right side is extruded to provide a leftwards force for the right side pressurizing block 3, the friction unit 4 is extruded by the two pressurizing blocks 3, the positive pressure between the friction unit 4 and the inner wall of the friction sleeve 1 is increased, and the size of the friction damper for dissipating seismic energy is changed. When the damper is arranged between the structural layers, the damper can automatically adjust the numerical value of the friction force according to the magnitude of the displacement reaction of the main body structure. The right-hand elastomer 5 is compressed and can also dissipate the energy transmitted to the structure by the earthquake.
Assuming that the earthquake force can make the building structure in fig. 6 swing back and forth left and right, and the initial vibration direction is horizontal movement to right, the one-way self-resetting adjustable friction energy-consuming damper A10 is firstly pulled, namely connected with the stay cable 8The slide shaft 2 is subjected to a tensile force. Because the friction damper is connected with the structure by the inhaul cable 8, the one-way self-resetting adjustable friction energy dissipation damper B11 is not stressed. The sliding shaft 2 in the tensioned one-way self-reset adjustable friction energy dissipation damper A10 generates rightward displacement L as a whole, then the stress direction of the structure is changed to the left, the one-way self-reset adjustable friction energy dissipation damper A10 does not receive external force, and the friction damping part begins to reset: the right pressurizing block 3 in the friction damping part is pushed by the elastic body 5, and the friction damping part starts to move leftwards, so that the reset is realized. The initial state of the elastic body 5 is obtained through theoretical calculation, and the elastic body 5 is provided with a precompression amount a which can provide a pretightening force FPreparation ofA magnitude of the sliding friction force f is larger than or equal to that of the frictional damping memberSliding deviceEnsuring that the frictional damping members return to their original positions. As can be seen from fig. 5, the hysteresis curve is full, indicating that the friction damper has good ability to dissipate seismic energy.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (3)
1. The utility model provides an one-way self-resetting adjustable friction energy dissipation damper which characterized in that: comprises a friction sleeve (1), a friction damping part, an elastic body (5), a fixed end (7), a stay cable (8) and an end cover (9);
the friction sleeve (1) is of a cylindrical structure with an opening at one end, a fixed end (7) is arranged on the outer side of the closed end, and the open end is connected with an end cover (9);
the friction damping part comprises a sliding shaft (2), a pressurizing block (3), a friction unit (4) and a nut (6); the sliding shaft (2) penetrates through the two pressurizing blocks (3) and the friction unit (4) clamped by the two pressurizing blocks (3), the pressurizing blocks (3) and the friction unit (4) are fixed through the sliding shaft (2) and the nut (6), one end of the sliding shaft (2) is in contact with the inner side face of the closed end of the friction sleeve (1), the other end of the sliding shaft (2) is connected with one end of a first inhaul cable (8), and the other end of the first inhaul cable (8) penetrates out of an opening of the end cover (9);
the elastic body (5) is arranged between the open end of the friction sleeve (1) and the pressurizing block (3);
the fixed end (7) is a connecting block with a hole and is used for connecting the friction sleeve (1) with one end of another inhaul cable (8).
2. A one-way self-resetting adjustable friction dissipative damper as claimed in claim 1, wherein: the sliding shaft (2) is a cylindrical solid rod, and the central axis of the sliding shaft is superposed with the central axis of the friction sleeve (1); the pressurizing block (3) is a circular plate, and the center of the pressurizing block is provided with a hole for the sliding shaft (2) to pass through; the friction unit (4) is a cylindrical rubber friction unit, and a circular hole is formed in the center of the friction unit and used for the sliding shaft (2) to penetrate through.
3. A use method of a one-way self-reset adjustable friction energy dissipation damper is characterized by comprising the following steps:
for one-way reset: assuming that the initial vibration direction is horizontal rightward movement, the unidirectional self-resetting adjustable friction energy-consumption damper is pulled rightwards, a sliding shaft (2) in the pulled unidirectional self-resetting adjustable friction energy-consumption damper generates rightward displacement L integrally, then the vibration direction is leftward, the structural stress direction is changed to be leftward, the unidirectional self-resetting adjustable friction energy-consumption damper is free from external force, and the friction damping part is reset: the right pressurizing block (3) in the friction damping part is pushed by the elastic body (5), and the friction damping part starts to move leftwards to realize resetting;
the device is used for adjusting the friction force, and comprises a pre-vibration adjustment and a post-vibration adjustment; adjusting before shaking: the sliding shaft (2) penetrates through a hole of the friction unit (4), and the pressing block (3) and the friction unit (4) adjust proper friction force through the change of the torque of the sliding shaft (2) and the nut (6); adjusting after shaking: when the sliding shaft (2) is pulled to move rightwards, the left end pressurizing block (3) is subjected to a rightwards force provided by the nut (6) and the sliding shaft (2), and the right side elastic body (5) is extruded to provide a leftwards force for the right side pressurizing block (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011458499.2A CN112609855B (en) | 2020-12-11 | 2020-12-11 | One-way self-resetting adjustable friction energy dissipation damper and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011458499.2A CN112609855B (en) | 2020-12-11 | 2020-12-11 | One-way self-resetting adjustable friction energy dissipation damper and use method thereof |
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| CN112609855A true CN112609855A (en) | 2021-04-06 |
| CN112609855B CN112609855B (en) | 2022-05-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014109160A (en) * | 2012-12-04 | 2014-06-12 | Takada Kiko Co Ltd | Displacement measuring device for vibration control damper |
| CN104482093A (en) * | 2014-12-03 | 2015-04-01 | 华侨大学 | Self-resetting friction-changing damper |
| CN107035014A (en) * | 2017-05-11 | 2017-08-11 | 昆明理工大学 | A kind of steel pipe rubber friction energy consumer |
| CN207749668U (en) * | 2017-12-04 | 2018-08-21 | 陕西交通职业技术学院 | A kind of active control cartridge type piezoelectric friction damper based on gyroscope |
| CN111255107A (en) * | 2019-11-08 | 2020-06-09 | 华东建筑设计研究院有限公司 | Double-rod type friction damper |
-
2020
- 2020-12-11 CN CN202011458499.2A patent/CN112609855B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014109160A (en) * | 2012-12-04 | 2014-06-12 | Takada Kiko Co Ltd | Displacement measuring device for vibration control damper |
| CN104482093A (en) * | 2014-12-03 | 2015-04-01 | 华侨大学 | Self-resetting friction-changing damper |
| CN107035014A (en) * | 2017-05-11 | 2017-08-11 | 昆明理工大学 | A kind of steel pipe rubber friction energy consumer |
| CN207749668U (en) * | 2017-12-04 | 2018-08-21 | 陕西交通职业技术学院 | A kind of active control cartridge type piezoelectric friction damper based on gyroscope |
| CN111255107A (en) * | 2019-11-08 | 2020-06-09 | 华东建筑设计研究院有限公司 | Double-rod type friction damper |
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