CN215405546U - Adjustable friction damper - Google Patents
Adjustable friction damper Download PDFInfo
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- CN215405546U CN215405546U CN202121606476.1U CN202121606476U CN215405546U CN 215405546 U CN215405546 U CN 215405546U CN 202121606476 U CN202121606476 U CN 202121606476U CN 215405546 U CN215405546 U CN 215405546U
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Abstract
The utility model relates to the technical field of bridge building earthquake resistance, and aims to solve the problem that the strength of earthquake action faced by a building structure cannot be accurately predicted and the traditional friction damper cannot give consideration to strong earthquake and weak earthquake; the piston rod I is provided with a first inner wedge block, the piston rod II is provided with a second inner wedge block, a gap exists between the first inner wedge block and the second inner wedge block, the first inner wedge block and the second inner wedge block are provided with outer wedge blocks, the inner side of each outer wedge block is abutted to the first inner wedge block and the second inner wedge block, and the outer side of each outer wedge block is abutted to the inner wall of the first sleeve. The utility model realizes the control of the damping energy consumption by controlling the sliding friction force, has good energy dissipation and damping capacity and can ensure that the structure simultaneously meets the damping requirements during strong shock and weak shock.
Description
Technical Field
The utility model relates to the technical field of bridge building earthquake resistance, in particular to an adjustable friction damper.
Background
Along with the acceleration of the urbanization process of China, the urban scale is enlarged, the urban building structure is more complex, in the earthquake-resistant design, not only the life safety of people needs to be guaranteed, but also the economic loss caused by the damage of the building structure and equipment needs to be considered, the earthquake-resistant method of the traditional structure passively resists the earthquake action by enhancing the earthquake-resistant performance of the structure, and due to the randomness of the earthquake, people cannot accurately estimate the strength and the characteristics of the future earthquake action.
In the anti-seismic and wind-resistant design of a building structure, if a friction damper is designed according to the condition under the action of strong shock, the damper cannot slide at all under the action of weak shock, the friction damper cannot eliminate energy, and if the sliding friction force is determined according to the condition of weak shock, the damper cannot achieve the ideal damping effect under the action of strong shock because the output tonnage is too small. The strength of the earthquake action faced by the building structure cannot be accurately predicted, so that the problem that strong earthquake and weak earthquake cannot be considered when the friction damper is adopted as a shock absorption part in the building structure exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an adjustable friction damper to solve the problem that strong shock and weak shock cannot be considered simultaneously when a traditional friction damper is adopted as a shock absorption part in a building structure because the strength of the earthquake action of the building structure cannot be accurately predicted.
The embodiment of the utility model is realized by the following steps:
an adjustable friction damper comprises a left ear plate and a right ear plate, wherein the left ear plate is fixedly connected with a bridge body, and the right ear plate is fixedly connected with an abutment;
a first sleeve is arranged between the left ear plate and the right ear plate, a first piston rod is connected to the left ear plate, the first piston rod extends into the first sleeve, the first sleeve is connected with a second sleeve, the second sleeve is fixedly connected with the right ear plate, a second piston rod is arranged in the second sleeve, and the second piston rod extends into the first sleeve and is in threaded connection with the first piston rod;
the piston rod is provided with a first inner wedge block on the first piston rod, a second inner wedge block on the second piston rod, a gap exists between the first inner wedge block and the second inner wedge block, a first outer wedge block is arranged outside the first inner wedge block and the second inner wedge block, the inner side of the second outer wedge block is abutted to the first inner wedge block and the second inner wedge block, and the outer side of the second outer wedge block is abutted to the inner wall of the first sleeve.
The utility model provides a damper which not only meets good energy dissipation and shock absorption capacity, but also enables a structure to simultaneously meet the shock absorption requirements during strong shock and weak shock from the perspective of conveniently enabling the structure to realize adjustable damping force. The utility model utilizes the expansion of the outer wedge block to adjust the positive pressure between the outer wedge block and the inner wall of the sleeve, thereby controlling the sliding friction force and realizing the control of the damping energy consumption.
Specifically, the first piston rod and the second piston rod are nested in a rotating mode through threads, the diameter of the outer wedge block is forced to be increased and abutted to the inner wall of the first sleeve, pressure between the outer wedge block and the first sleeve can be changed, the first piston rod drives the outer wedge block to slide relative to the first sleeve when sliding, friction force between the outer wedge block and the first sleeve under the earthquake action is changed, earthquake energy is converted into heat energy to be dissipated, the good damping effect under the earthquake action with different strengths is achieved, and meanwhile the shock absorption device is easy to manufacture, flexible to arrange, simple and convenient to install, high in operation efficiency and low in maintenance cost.
In one embodiment:
the inner wedge block I and the inner wedge block II are arranged oppositely at the ends with smaller thicknesses, the thickness of the middle part of the outer wedge block is larger than that of the end part of the outer wedge block, and the outer wedge block is matched with the inner wedge block I and the inner wedge block II.
Be convenient for when with piston rod one, two threaded connection of piston rod, interior wedge block one and interior wedge block two are close to each other, and piston rod one is close to gradually with the great one end of two thickness of piston rod to strut outer wedge block, thereby increase the pressure between outer wedge block and the sleeve one, outer wedge block and sleeve looks mutual friction produce reliable and stable frictional force, play shock insulation absorbing effect better. The energy consumption efficiency is high, the energy loss is small, the shock absorption and energy dissipation effects can be improved, and the safety and the durability of the structure can be improved.
In one embodiment:
and the first inner wedge block and the second inner wedge block are respectively provided with a check ring at one end with larger thickness, and the check rings are respectively arranged on the first piston rod and the second piston rod.
The retaining ring plays a limiting role, limits the positions of the first inner wedge block and the second inner wedge block, and ensures that the first inner wedge block and the second inner wedge block can participate in work under the action of an earthquake to play a role.
In one embodiment:
grooves are formed in the first piston rod and the second piston rod, and the check rings are installed in the grooves.
The retainer ring with the groove is not easy to shift.
In one embodiment:
and a left end cover and a right end cover are respectively arranged at two ends of the first sleeve, and the right end cover is abutted to the second sleeve.
The left end cover and the right end cover play roles in dust prevention and water prevention.
In one embodiment:
the left end cover and the right end cover are in threaded connection with the sleeve.
In one embodiment:
the inner rings of the left end cover and the right end cover are coated with polytetrafluoroethylene, and the polytetrafluoroethylene is used for protecting the surfaces of the first piston rod and the second piston rod from friction damage.
In one embodiment:
the first piston rod is provided with a square limiting part, the limiting part is located between the left ear plate and the left end cover, a nut is arranged between the left ear plate and the limiting part, and the nut can abut against the limiting part.
The limiting part is matched with the nut to play a limiting role, and the first piston rod is guaranteed to move within a certain range.
In one embodiment:
and the piston rod II is provided with a baffle plate, and the baffle plate is fixedly connected with the right end cover.
The right piston rod II is prevented from rotating.
In one embodiment:
the baffle plate is fixedly connected with the right end cover through screws.
In one embodiment:
elastic components are arranged between the retainer ring and the first inner wedge block and between the retainer ring and the second inner wedge block.
In one embodiment:
the elastic member may be a member having elastic expansion and contraction properties such as a spring.
In one embodiment:
the left ear plate is connected with the first piston rod through threads, and the right ear plate is connected with the second sleeve in a welding mode.
The first piston rod is fixedly connected with the left lug plate and the second piston rod through thread pairs.
In one embodiment:
the outer wedge block comprises three wedge block units, the three wedge block units are arranged in a surrounding mode, and a gap exists between every two adjacent wedge block units.
The diameter of the outer wedge-shaped block is convenient to change, when the inner wedge-shaped block props the outer wedge-shaped block, the gap between two adjacent wedge-shaped block units is increased, and therefore the diameter of the outer wedge-shaped block is increased.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
the utility model provides a damper which not only meets good energy dissipation and shock absorption capacity, but also enables a structure to simultaneously meet the shock absorption requirements during strong shock and weak shock from the perspective of conveniently enabling the structure to realize adjustable damping force. The utility model utilizes the expansion of the outer wedge block to adjust the positive pressure between the outer wedge block and the inner wall of the sleeve, thereby controlling the sliding friction force, realizing the control of the damping energy consumption, having better damping effect under the action of earthquakes with different strengths, and simultaneously being easy to manufacture, flexible in arrangement, simple and convenient in installation, high in operation efficiency and less in maintenance cost.
Drawings
Fig. 1 is a schematic structural view of an adjustable friction damper according to embodiment 1.
Fig. 2 is a sectional view of the piston rod two.
Fig. 3 is a schematic structural view of an adjustable friction damper according to embodiment 3.
Icon: 1-left ear plate; 2-a nut; 3-left end cap; 4-a first piston rod; 5-a retainer ring; 61-inner wedge block one; 62-inner wedge block two; 7-an outer wedge block; 8, sleeving a first sleeve; 9-right end cap; 10-a baffle plate; 11-a second piston rod; 12-sleeve two; 13-right ear plate; 14-a limit stop; 15-spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the present embodiment provides an adjustable friction damper, including a left ear plate 1 and a right ear plate 13, where the left ear plate 1 is fixedly connected to a bridge body, and the right ear plate 13 is fixedly connected to an abutment;
left side otic placode 1 with be equipped with sleeve one 8 between the right otic placode 13, threaded connection has piston rod one 4 on the left side otic placode 1, piston rod one 4 stretches into set up in sleeve one 8, sleeve one 8 is connected with sleeve two 12, sleeve two 12 with right otic placode 13 welding, be provided with piston rod two 11 in the sleeve two 12, piston rod two 11 stretches into in sleeve one 8, and with 4 threaded connection of piston rod, piston rod one 4 mutual slip can be realized between piston rod two 11 and the sleeve one 8.
The two ends of the first sleeve 8 are respectively provided with a left end cover 3 and a right end cover 9, the left end cover 3 and the right end cover 9 are in threaded connection with the first sleeve 8, inner rings of the left end cover 3 and the right end cover 9 are coated with polytetrafluoroethylene, and the surface of the piston rod is protected from friction damage.
The right side of the right end cover 9 is provided with a baffle plate 10, the baffle plate 10 is installed on the second piston rod 11, and the baffle plate 10 is fixedly connected with the right end cover 9 through screws.
A square limiting piece 14 and a nut 2 are arranged between the left ear plate 1 and the left end cover 3, the limiting piece 14 is located on the right side of the nut 2, and the nut 2 can be abutted to the limiting piece 14. The nut 2 is arranged on the first piston rod 4, the limiting piece 14 is a section of the first piston rod 4, and during construction, the section is made to be square in cross section, so that the adjustable friction damper has a limiting function when the adjustable friction damper is pressed and pulled.
The piston rod 4 is sleeved with a first inner wedge block 61, a second inner wedge block 62 is sleeved on a second piston rod 11, a gap exists between the first inner wedge block 61 and the second inner wedge block 62, the first inner wedge block 61 and the smaller end of the second inner wedge block 62 are arranged oppositely, and the first inner wedge block 61 and the larger end of the second inner wedge block 62 are far away from the device.
The first inner wedge block 61 and the second inner wedge block 62 are respectively provided with a check ring 5 at one end with larger thickness, and the check rings 5 are respectively arranged on the first piston rod 4 and the second piston rod 11. Grooves are formed in the first piston rod 4 and the second piston rod 11, the retainer ring 5 is installed in the grooves, and the retainer ring 5 plays a limiting role in limiting the positions of the first inner wedge block 61 and the second inner wedge block 62.
And an outer wedge block 7 is arranged outside the first inner wedge block 61 and the second inner wedge block 62, the outer wedge block 7 comprises three wedge block units, the three wedge block units are arranged in a surrounding manner, and a gap exists between every two adjacent wedge block units. The thickness of the middle part of the outer wedge block 7 is larger than that of the end part of the outer wedge block, and the outer wedge block 7 is matched with the first inner wedge block 61 and the second inner wedge block 62.
The inner side of the outer wedge block 7 is abutted to the first inner wedge block 61 and the second inner wedge block 62, and the outer side of the outer wedge block 7 is abutted to the inner wall of the first sleeve 8.
The first piston rod 4 and the second piston rod 11 are rotationally nested through threads, the diameter of the outer wedge block 7 is forced to be increased and is abutted to the inner wall of the first sleeve 8, so that the pressure between the outer wedge block 7 and the first sleeve 8 can be changed, the outer wedge block 7 and the first sleeve 8 are driven to form relative sliding when the piston rods slide, the friction force between the outer wedge block 7 and the first sleeve 8 under the earthquake action is further changed, the earthquake energy is converted into heat energy to be dissipated, a good damping effect under the earthquake action with different strengths is achieved, and meanwhile the shock absorber is easy to manufacture, flexible in arrangement, simple and convenient to install, high in operation efficiency and low in maintenance cost.
Specifically, under the earthquake condition, when horizontal thrust of the transverse bridge to the earthquake is transmitted to the left ear plate 1 through the structure, the piston rod I4 moves rightwards relative to the sleeve I8 under the action of external force, so that the friction resistance between the friction unit (the inner wedge block I61, the inner wedge block II 62 and the outer wedge block 7) and the inner wall of the sleeve I8 is increased, and the damping and energy consumption are realized. The positive pressure between the friction unit and the inner wall of the first sleeve 8 can be changed by adjusting the threaded connection pair of the first piston rod 4 and the second piston rod 11, so that the sliding friction force can be automatically adjusted, different damping forces can be obtained, and the damping requirements of the structure during strong shock and weak shock can be met simultaneously.
Under the earthquake condition, when horizontal tension of the transverse bridge to the earthquake is transmitted to the left ear plate 1 through the structure, the piston rod I4 moves leftwards relative to the sleeve I8 under the action of external force, so that the friction resistance between the friction unit (the inner wedge block I61, the inner wedge block II 62 and the outer wedge block 7) and the inner wall of the sleeve I8 is increased, and the damping and energy consumption are realized. The positive pressure between the friction unit and the inner wall of the first sleeve 8 can be changed by adjusting the threaded connection pair of the first piston rod 4 and the second piston rod 11, so that the sliding friction force can be automatically adjusted, different damping forces can be obtained, and the damping requirements of the structure during strong shock and weak shock can be met simultaneously.
The adjustable friction damper can simultaneously realize the shock absorption and energy consumption under compression and tension, has symmetrical structural form and can not generate buckling deformation.
Example 2
This example differs from example 1 in that: in embodiment 1, the threaded connection pair between the first piston rod 4 and the second piston rod 11 is replaced by a transmission pair such as a worm gear, so that the positive pressure between the friction unit and the inner wall of the first sleeve 8 is changed to adjust the sliding friction force, and different damping forces are obtained to meet different damping requirements.
Example 3
This example differs from example 1 in that: referring to fig. 3, springs 15 are arranged between the retainer ring 5 and the first inner wedge block 61 and between the retainer ring 5 and the second inner wedge block 62, and are used for ensuring that the attenuation degree of the pretightening force is reduced as much as possible.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An adjustable friction damper characterized by:
the bridge comprises a left ear plate (1) and a right ear plate (13), wherein the left ear plate (1) is fixedly connected with a bridge body, and the right ear plate (13) is fixedly connected with an abutment;
a first sleeve (8) is arranged between the left ear plate (1) and the right ear plate (13), a first piston rod (4) is connected to the left ear plate (1), the first piston rod (4) extends into the first sleeve (8), the first sleeve (8) is connected with a second sleeve (12), the second sleeve (12) is fixedly connected with the right ear plate (13), a second piston rod (11) is arranged in the second sleeve (12), and the second piston rod (11) extends into the first sleeve (8) and is in threaded connection with the first piston rod (4);
be equipped with interior wedge (61) on piston rod (4), be equipped with interior wedge two (62) on piston rod two (11), interior wedge (61) with there is the clearance between interior wedge two (62), interior wedge (61) with interior wedge two (62) are equipped with outer wedge (7) outward, the inboard of outer wedge (7) with interior wedge (61) interior wedge two (62) looks butt, the outside of outer wedge (7) with the inner wall looks butt of sleeve (8).
2. The adjustable friction damper of claim 1, wherein:
the inner wedge block I (61) and the inner wedge block II (62) are arranged oppositely at the end with smaller thickness, the thickness of the middle part of the outer wedge block (7) is larger than that of the end part of the outer wedge block, and the outer wedge block (7) is matched with the inner wedge block I (61) and the inner wedge block II (62).
3. The adjustable friction damper of claim 2, wherein:
the inner wedge block I (61) and the inner wedge block II (62) are respectively provided with a check ring (5) at one end with larger thickness, and the check rings (5) are respectively arranged on the piston rod I (4) and the piston rod II (11).
4. The adjustable friction damper of claim 3, wherein:
grooves are formed in the first piston rod (4) and the second piston rod (11), and the check ring (5) is installed in the grooves.
5. The adjustable friction damper of claim 1, wherein:
and the two ends of the first sleeve (8) are respectively provided with a left end cover (3) and a right end cover (9), and the right end cover (9) is abutted to the second sleeve (12).
6. The adjustable friction damper of claim 5, wherein:
the piston rod I (4) is provided with a square limiting piece (14), the limiting piece (14) is located between the left ear plate (1) and the left end cover (3), a nut (2) is arranged between the left ear plate (1) and the limiting piece (14), and the nut (2) can abut against the limiting piece (14).
7. The adjustable friction damper of claim 5, wherein:
and a baffle (10) is arranged on the second piston rod (11), and the baffle (10) is fixedly connected with the right end cover (9).
8. The adjustable friction damper of claim 4, wherein:
elastic components are arranged between the retainer ring (5) and the first inner wedge block (61) and between the retainer ring (5) and the second inner wedge block (62).
9. The adjustable friction damper according to any of claims 1-8, wherein:
the left ear plate (1) is connected with the piston rod I (4) through threads, and the right ear plate (13) is connected with the sleeve II (12) in a welding mode.
10. The adjustable friction damper according to claim 9, wherein:
the outer wedge block (7) comprises three wedge block units, the three wedge block units are arranged in a surrounding mode, and a gap exists between every two adjacent wedge block units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121606476.1U CN215405546U (en) | 2021-07-15 | 2021-07-15 | Adjustable friction damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121606476.1U CN215405546U (en) | 2021-07-15 | 2021-07-15 | Adjustable friction damper |
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| Publication Number | Publication Date |
|---|---|
| CN215405546U true CN215405546U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121606476.1U Active CN215405546U (en) | 2021-07-15 | 2021-07-15 | Adjustable friction damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658128A (en) * | 2022-05-19 | 2022-06-24 | 北京市科学技术研究院城市安全与环境科学研究所 | Bidirectional beam falling prevention damper with macroscopic NPR structure and building structure with same |
-
2021
- 2021-07-15 CN CN202121606476.1U patent/CN215405546U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658128A (en) * | 2022-05-19 | 2022-06-24 | 北京市科学技术研究院城市安全与环境科学研究所 | Bidirectional beam falling prevention damper with macroscopic NPR structure and building structure with same |
| CN114658128B (en) * | 2022-05-19 | 2022-08-16 | 北京市科学技术研究院城市安全与环境科学研究所 | Bidirectional beam falling prevention damper with macroscopic NPR structure and building structure with same |
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