CN108915113A - A kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper - Google Patents
A kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper Download PDFInfo
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- CN108915113A CN108915113A CN201810709371.5A CN201810709371A CN108915113A CN 108915113 A CN108915113 A CN 108915113A CN 201810709371 A CN201810709371 A CN 201810709371A CN 108915113 A CN108915113 A CN 108915113A
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- absorbing
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- 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
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- Business, Economics & Management (AREA)
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- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The present invention provides a kind of sectionally assembled energy-dissipating and shock-absorbing viscous dampers, including two master cylinders, a connection cylinder, an active piston, two by piston, two plugging devices, sealing ring, viscous daming material, two spring arrangements, guide rod, two connectors, the connection cylinder connects described two master cylinders, it is described two to be located among two master cylinders by piston, it is moved with the movement of the active piston.A kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper energy-dissipating and shock-absorbing principle of the present invention is that the active piston that guide rod movement drives and the guide rod is affixed moves, to squeeze the viscous daming material inside the master cylinder, the viscous daming material pushes the passive piston motion, by the damping hole current limliting by piston limit it is described biggish damping force is generated by the movement velocity of piston, reach damping effect.
Description
Technical field
The present invention relates to civil engineering damper technical fields, and in particular to a kind of sectionally assembled energy-dissipating and shock-absorbing is viscous
Damper.
Background technique
Since the 1970s, viscous damper was introduced into Structural Engineering by people, by decades research and
Development, has been used as a kind of effective ways of building structure shockproof control, the use of the energy-consumption shock-absorption devices such as viscous damper
It can reduce geological process with the seismic response of effective attenuation structure to the damage and failure of structure, have in structural seismic control field
Be widely applied.
Viscous damper belongs to the energy-consuming device of speed relationship type, energy-consuming device act on the damping force in structure always with
The directional velocity of structure motion is on the contrary, to achieve the effect that dissipation energy during structure motion.Nowadays, Practical Project
Viscous damper used in is various informative, to reach comparatively ideal energy consumption effect and need based in structure generation layer
Between relative displacement it is biggish basis on, be not particularly pertinent to the contribution of energy consumption in the lesser situation of structure motion amplitude.
The present invention makes the movement velocity of damper internal motion piston compared with structure motion speed by designing reasonable space layout form
Increase, improve viscous damper to the lesser relative storey displacement susceptibility of structure, is provided when thin tail sheep occurs for structure biggish
Damping force reduces structure relative storey displacement, the stability of reinforcement structure.
Summary of the invention
In order to reduce structural vibration, enclosed structure safety improves and uses function, and the present invention provides a kind of sectionally assembled
Energy-dissipating and shock-absorbing viscous damper.
The specific technical solution of the present invention is as follows:
The present invention provides a kind of sectionally assembled energy-dissipating and shock-absorbing viscous dampers, including two master cylinders, a connection cylinder, one
Active piston, two by piston, two plugging devices, sealing ring, viscous daming material, two spring arrangements, guide rod, two
Connector, the connection cylinder connect described two master cylinders, and the viscous daming material is the viscous resistance with strong mobility high-damping
Buddhist nun's liquid, described two that multiple damping holes are circumferentially equipped with by piston, sealing ring built in described two plugging devices avoids described
Viscous daming material leakage, the active piston and the guide rod are affixed, and the guide rod is connected with structure, described two spring dresses
It sets and is equipped with washer, described two connectors are connect with the guide rod and second plugging device respectively, it acts as facilitating
Viscous damper is stated to connect with structure.A kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper energy-dissipating and shock-absorbing principle of the present invention is institute
It states guide rod movement and drives the active piston movement affixed with the guide rod, to squeeze the viscous damping inside the master cylinder
Material, the viscous daming material push the passive piston motion, are limited by the damping hole current limliting by piston
It is described that biggish damping force is generated by the movement velocity of piston, reach damping effect.
A kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper, specifically includes following steps:
Step 1:Based on first master cylinder, the connection cylinder left end is connect with the first master cylinder right end;
Step 2:It is the active piston and the guide rod is affixed and be inserted into it in first master cylinder from right end;
Step 3:The right end of second master cylinder left end and the connection cylinder is connected, the company of the damper middle section is completed
It connects;
Step 4:From the left end of first master cylinder inject the quantitative viscous daming material and by first by piston from
Left end is inserted into first master cylinder;
Step 5:The sealing ring is built in first plugging device and covers first spring arrangement described
On one plugging device, after described first is installed by piston, the viscous daming material is injected from left end and by described the
One plugging device is installed on the left end of first master cylinder, completes the installation of the viscous damper left end;
Step 6:From the right end of second master cylinder inject the quantitative viscous daming material and by second by piston from
Right end is inserted into second master cylinder;
Step 7:The sealing ring is built in second plugging device and covers the second spring device described
On two plugging devices, after described second is installed by piston, the viscous daming material is injected and by second envelope
Block apparatus is installed on the right end of second master cylinder, completes the installation of the viscous damper right end;
Step 8:First connector 13 is connect with the guide rod 12, by second connector 15 and second plugging device
8 is affixed, completes a kind of installation of sectionally assembled energy-dissipating and shock-absorbing viscous damper of the present invention.
About the words such as " left end ", " right end ", " middle section " all using Figure of abstract as ginseng described in from step 1 to step 8
It examines.
The present invention has the following advantages that compared with the existing technology:
1, your viscous damper of a kind of energy-dissipating and shock-absorbing of the present invention, it is characterised in that the viscous damper is piecewise combination
Structure, each segmentation have different functions, can be according to structure space deployment scenarios flexible design various pieces, between various pieces
By the common connection type connection of engineering or workshop, process easy to assembly;
2, the first heretofore described master cylinder and the second master cylinder inner space variable cross-section, when in area of section larger space
Viscous daming material when being compressed into the lesser space of area of section, along the displacement and speed of damper longitudinal movement
It will increase, to make passive piston movement speed be amplified and make to be reached by piston by biggish damping force and preferably subtract
Shake effect;
3, of the invention that damping hole is equipped on by piston, main there are two effects, one is working as by piston by viscous
When the extruding of damping material, the viscous daming material provides the space of passive piston motion by damping hole, the second is
When passive piston movement speed is larger, due to damping hole metering function and biggish damping force is provided;
4, the present invention connects measure without additional designs between the spring arrangement and the viscous damper, spring arrangement
For when compressed, elastic restoring force can assist described being quickly returning to initial position by piston for effect;
5, sealing ring is arranged in the plugging device in the present invention, avoids the leakage of viscous daming material;
6, the connection type Basic Design involved in the present invention is tightened for screw thread, easy to assembly;
7, major function of the present invention is structural seismic control, and use scope is wide, is nowadays cut using wider frame structure, frame-
The structure types such as power wall construction, steel construction may be used as object.
Detailed description of the invention
Fig. 1 is a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper diagrammatic cross-section of the present invention;
Fig. 2 is a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper D profile schematic diagram of the present invention;
Fig. 3 is that a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper three-dimensional of the present invention assembles effect picture;
Fig. 4 is the spring arrangement three-dimensional organigram;
Fig. 5 is described first by piston three-dimensional organigram;
Fig. 6 is first plugging device, the spring arrangement and the sealing ring geometrical relationship schematic diagram.
First master cylinder is as second master cylinder, and the first spring arrangement is as the second spring device, institute
State first by piston with described second by piston as, by its separately number be only description need.
Wherein, 1:First master cylinder, 2:First by piston, and 3:First plugging device, 4:Active piston, 5:Connection cylinder, 6:
Second master cylinder, 7:Second by piston, and 8:Second plugging device, 9:Viscous daming material, 10:Sealing ring, 11:First spring dress
It sets, 12:Guide rod, 13:First connector, 14:Second spring device, 15:Second connector.
Specific embodiment
Below in conjunction with attached drawing, a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper of the invention is done further detailed
Explanation.
As shown in Figure 1 to Figure 2, a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper of the present invention, including the first master cylinder 1,
First by piston 2, the first plugging device 3, active piston 4, connection cylinder 5, the second master cylinder 6, second is by piston 7, the second envelope
Block apparatus 8, viscous daming material 9, sealing ring 10, the first spring arrangement 11, guide rod 12, the first connector 13, second spring device
14 and second connector 15.First master cylinder 1 constitutes described first by piston 2, active piston with first plugging device 3
4, the space of viscous daming material 9 and the first spring arrangement 11, second master cylinder 6 and 8 structure of the second plugging device
At described second by piston 7, active piston 4, viscous daming material 9 and second spring device 14 space;
As shown in figure 3, effect picture after a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper assembling of the present invention, first connector
13 and second connector 15 for being connect with structure;
As shown in figure 4, the spring arrangement 11 is composed of two washers 111 and a spring 112;
As shown in figure 5, described first is circumferentially equipped with several damping holes 21 in piston 2, described second by piston 7 and institute
It is the same by 2 structure snd size of piston to state first;
As shown in fig. 6, the sealing ring 10 is embedded in first plugging device 3,11 sets of first spring arrangement is in institute
It states on the first plugging device 3, second plugging device 8 is as 3 structure snd size of the first plugging device.
A kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper, includes the following steps:
Step 1:Based on first master cylinder 1,5 left end of connection cylinder is connect with 1 right end of the first master cylinder;
Step 2:It is the active piston 4 is affixed with the guide rod 12 and be inserted into it in first master cylinder 1 from right end;
Step 3:The right end of second master cylinder, 6 left end and the connection cylinder 5 is connected, the damper middle section is completed
Connection;
Step 4:The quantitative viscous daming material 9 is injected and by first by piston 2 from the left end of first master cylinder 1
It is inserted into first master cylinder 1 from left end;
Step 5:The sealing ring 10 is built in first plugging device 3 and by 11 sets of first spring arrangement in institute
It states on the first plugging device, after described first is installed by piston 2, injects the viscous daming material 9 and by described
One plugging device 3 is installed on the left end of first master cylinder 1, completes the installation of the viscous damper left end;
Step 6:From the right end of second master cylinder 6 inject the quantitative viscous daming material 9 and by described second it is passive
Piston 7 is inserted into second master cylinder 6 from right end;
Step 7:The sealing ring 10 is built in second plugging device 8 and by 14 sets of the second spring device in institute
It states on the second plugging device 8, after described second is installed by piston 7, injects the viscous daming material 9 from right end and incite somebody to action
Second plugging device 8 is installed on the right end of second master cylinder 6, completes the installation of the viscous damper right end;
Step 8:First connector 13 is connect with the guide rod 12, by second connector 15 and second plugging device
8 is affixed.
About the words such as " left end ", " right end ", " middle section " all using Figure of abstract as ginseng described in from step 1 to step 8
It examines, completes a kind of installation of sectionally assembled energy-dissipating and shock-absorbing viscous damper of the present invention.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper, it is characterised in that:Including two master cylinders, connection a cylinder, one
A active piston, two by piston, two plugging devices, sealing ring, viscous daming material, two spring arrangements, guide rod, two
A connector, described two master cylinders are the first master cylinder and the second master cylinder, and the connection cylinder connects described two master cylinders, the viscous resistance
Damping material is the viscous damping liquid with strong mobility high-damping, and described two by piston is first by piston and the second quilt
Piston, it is described two to be circumferentially equipped with multiple damping holes by piston, described two plugging devices be the first plugging device and
Second plugging device, the sealing ring are embedded in the plugging device, and the viscous daming material is avoided to leak, described two
Spring arrangement is built in respectively in described two plugging devices, and position is inside the viscous damper between the passive work
Between plug and the plugging device, the active piston and the guide rod are affixed, and described two connectors are divided into the first connector and the
Two connectors, first connector are connect with the guide rod, and second connector is connect with second plugging device, described two
Connector is mainly used for connecting with external structure.
2. a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper according to claim 1, it is characterised in that:Described one
The sectionally assembled energy-dissipating and shock-absorbing viscous damper of kind is sectionally assembled structure, and the active piston region is active control
Region, described first by piston and described second by piston region be energy consumption region.
3. a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper according to claim 1, it is characterised in that:Except the master
Except piston and affixed and described second connector of the guide rod and second plugging device are affixed, remaining connection type
It is connected through a screw thread.
4. a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper according to claim 1, it is characterised in that:To make guide rod
Damper kernel of section is passed through, the plugging device reserves hollow channel, constitutes outside the steel wall and the master cylinder in the channel
The space that wall combination constitutes the active piston, moved by piston and the viscous daming material, it is the active piston, passive
Piston and viscous daming material are located within this space.
5. a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper according to claim 1, it is characterised in that:It is described viscous
It is equipped with active piston inside damper and by piston, the active piston and the guide rod are affixed, described to be set in piston
There is damping hole, it is described to be moved by piston with the movement of the active piston.
6. a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper according to claim 1, it is characterised in that:The master cylinder
Variable cross-section, described first is located in the smaller space in master cylinder section by piston and the second passive piston portion structure,
The active piston is fully located in the larger space of the master cylinder section, when the active piston the master cylinder inner section compared with
When big space moves, in the smaller space of master cylinder inner section immediately ahead of the active piston direction of motion
Be 2 times of the active piston even more times by the movement velocity of piston and displacement.
7. a kind of sectionally assembled energy-dissipating and shock-absorbing viscous damper according to claim 1, it is characterised in that:It is described two
Spring arrangement is made of spring and washer, and the washer is fixed in the both ends of the spring, and the function of the spring arrangement is in institute
It assists described being quickly returning to its initial position by piston during stating piston motion.
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CN201810709371.5A CN108915113B (en) | 2018-07-02 | 2018-07-02 | Sectional combined energy-consuming damping viscous damper |
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CN201810709371.5A CN108915113B (en) | 2018-07-02 | 2018-07-02 | Sectional combined energy-consuming damping viscous damper |
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CN108915113A true CN108915113A (en) | 2018-11-30 |
CN108915113B CN108915113B (en) | 2020-09-29 |
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CN201810709371.5A Expired - Fee Related CN108915113B (en) | 2018-07-02 | 2018-07-02 | Sectional combined energy-consuming damping viscous damper |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110258597A (en) * | 2019-07-15 | 2019-09-20 | 中南大学 | A method of it consumes energy for rock bolt shank damping |
CN110344410A (en) * | 2019-07-15 | 2019-10-18 | 中南大学 | Concatenation unit for rock bolt shank damping energy consumption and the anchor pole from damping energy consumption |
CN110453801A (en) * | 2019-07-25 | 2019-11-15 | 湖北文理学院 | A kind of multi-direction damping protection system and its shock-dampening method of tall and slender structure |
CN110671460A (en) * | 2019-09-24 | 2020-01-10 | 南京大德减震科技有限公司 | Shear type viscous damper |
CN110761431A (en) * | 2019-10-29 | 2020-02-07 | 北京交通大学 | Combined shock-absorbing damper with self-resetting function |
CN111827760A (en) * | 2020-06-22 | 2020-10-27 | 同济大学 | Self-resetting wide-frequency-domain hybrid energy consumption damper |
CN113445802A (en) * | 2020-07-20 | 2021-09-28 | 长江师范学院 | Shock absorption and energy dissipation method of shock absorption device for building earthquake-resistant joint |
CN115749032A (en) * | 2022-12-05 | 2023-03-07 | 重庆交通大学 | Displacement and acceleration grading double-control hybrid damper |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5522481A (en) * | 1994-12-09 | 1996-06-04 | Bridgestone/Firestone, Inc. | Vibration damping device using ER fluids |
JP2006077787A (en) * | 2004-09-07 | 2006-03-23 | Honda Motor Co Ltd | Variable damping force damper |
CN101514731A (en) * | 2009-03-25 | 2009-08-26 | 中国电力科学研究院 | Viscous fluid damper |
CN105221644A (en) * | 2015-10-29 | 2016-01-06 | 上海堃熠工程减震科技有限公司 | Fluid linking damper |
CN205118106U (en) * | 2015-11-12 | 2016-03-30 | 华东交通大学 | Magneto rheological damper with serial -type flow channel |
CN206972813U (en) * | 2017-07-28 | 2018-02-06 | 江苏力汇振控科技有限公司 | A kind of Ben-Hur formula Effects of Viscous Fluid Damper |
CN207333549U (en) * | 2017-10-30 | 2018-05-08 | 南京百西思建筑科技有限公司 | A kind of viscid fluid damper of big stroke |
CN108119600A (en) * | 2017-12-26 | 2018-06-05 | 常州大学 | The intelligent buffer device that a kind of rigidity vibration isolation is automatically switched with damping buffering |
-
2018
- 2018-07-02 CN CN201810709371.5A patent/CN108915113B/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5522481A (en) * | 1994-12-09 | 1996-06-04 | Bridgestone/Firestone, Inc. | Vibration damping device using ER fluids |
JP2006077787A (en) * | 2004-09-07 | 2006-03-23 | Honda Motor Co Ltd | Variable damping force damper |
CN101514731A (en) * | 2009-03-25 | 2009-08-26 | 中国电力科学研究院 | Viscous fluid damper |
CN105221644A (en) * | 2015-10-29 | 2016-01-06 | 上海堃熠工程减震科技有限公司 | Fluid linking damper |
CN205118106U (en) * | 2015-11-12 | 2016-03-30 | 华东交通大学 | Magneto rheological damper with serial -type flow channel |
CN206972813U (en) * | 2017-07-28 | 2018-02-06 | 江苏力汇振控科技有限公司 | A kind of Ben-Hur formula Effects of Viscous Fluid Damper |
CN207333549U (en) * | 2017-10-30 | 2018-05-08 | 南京百西思建筑科技有限公司 | A kind of viscid fluid damper of big stroke |
CN108119600A (en) * | 2017-12-26 | 2018-06-05 | 常州大学 | The intelligent buffer device that a kind of rigidity vibration isolation is automatically switched with damping buffering |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110258597A (en) * | 2019-07-15 | 2019-09-20 | 中南大学 | A method of it consumes energy for rock bolt shank damping |
CN110344410A (en) * | 2019-07-15 | 2019-10-18 | 中南大学 | Concatenation unit for rock bolt shank damping energy consumption and the anchor pole from damping energy consumption |
CN110453801A (en) * | 2019-07-25 | 2019-11-15 | 湖北文理学院 | A kind of multi-direction damping protection system and its shock-dampening method of tall and slender structure |
CN110453801B (en) * | 2019-07-25 | 2024-05-10 | 湖北文理学院 | Multidirectional damping protection system with high-flexibility structure and damping method thereof |
CN110671460A (en) * | 2019-09-24 | 2020-01-10 | 南京大德减震科技有限公司 | Shear type viscous damper |
CN110761431A (en) * | 2019-10-29 | 2020-02-07 | 北京交通大学 | Combined shock-absorbing damper with self-resetting function |
CN111827760A (en) * | 2020-06-22 | 2020-10-27 | 同济大学 | Self-resetting wide-frequency-domain hybrid energy consumption damper |
CN113445802A (en) * | 2020-07-20 | 2021-09-28 | 长江师范学院 | Shock absorption and energy dissipation method of shock absorption device for building earthquake-resistant joint |
CN113445802B (en) * | 2020-07-20 | 2022-08-19 | 长江师范学院 | Shock absorption and energy dissipation method of shock absorption device for building earthquake-resistant joint |
CN115749032A (en) * | 2022-12-05 | 2023-03-07 | 重庆交通大学 | Displacement and acceleration grading double-control hybrid damper |
CN115749032B (en) * | 2022-12-05 | 2024-05-24 | 重庆交通大学 | Displacement and acceleration grading double-control hybrid damper |
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