CN203656014U - Viscous damper - Google Patents
Viscous damper Download PDFInfo
- Publication number
- CN203656014U CN203656014U CN201320860523.4U CN201320860523U CN203656014U CN 203656014 U CN203656014 U CN 203656014U CN 201320860523 U CN201320860523 U CN 201320860523U CN 203656014 U CN203656014 U CN 203656014U
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- Prior art keywords
- viscous damper
- damping
- valve pocket
- piston head
- valve
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- Expired - Lifetime
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- 238000013016 damping Methods 0.000 claims abstract description 90
- 239000007788 liquid Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 229910001060 Gray iron Inorganic materials 0.000 claims description 2
- 239000003082 abrasive agent Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of shock (vibration) attenuation and particularly relates to a viscous damper. The viscous damper comprises a cylinder body, a cylinder cover, a piston rod, a piston head, a guide sleeve, a seal and viscous damping fluid, wherein the cylinder body and the cylinder cover form a damping chamber, the piston head divides the damping chamber into a first damping chamber and a second damping chamber, a safety valve is installed on the piston head and the two ends of the safety valve are respectively connected with the first damping chamber and the second damping chamber. The viscous damper provided by the utility model has the advantages that by installing the safety valve on the piston head, when the viscous damper is in a normal working condition, the safety valve is in a normally closed state; when the viscous damper is in accident working conditions such as overload, the safety valve is opened to relieve pressure, so as to prevent the viscous damper from being damaged due to a reason that the internal pressure of the viscous damper exceeds the limit..
Description
Technical field
The utility model belongs to damping (shaking) technical field, relates in particular to a kind of viscous damper.
Background technique
The 1950's, viscous damper is applied in machinery, vehicle, space flight and military engineering as a kind of good energy-dissipating and shock-absorbing (shaking) construction element, introduced the industries such as building, bridge, railway, power plant, steel mill the seventies by people and be used for resisting earthquake, wind shakes or other external load causes vibration, obtained good effect.Along with the fast development of structural damping (shaking) industry, viscous damper is also progressively developed and applies at China's civil engineering field in recent years, is progressively applied in the engineerings such as bridge works, tall building and equipment Foundations.
Common viscous damper is hydraulic oil cylinder type, it is mainly by piston head, piston rod, cylinder body and sealing composition, piston with respect to cylinder body at axially reciprocating, piston head be provided with some apertures or and cylinder body between leave suitable radial clearance, the damping cavity of oil cylinder inside is divided into two damping chambers by piston head, damping cavity is indoor is filled with the viscous liquid that viscosity is higher, when piston is during with respect to cylinder movement, being enclosed within the indoor liquid of pressurized one side damping cavity is squeezed, pressure raises, from the gap between piston head and cylinder body or aperture flow to another damping chamber, the resistance to motion of the poor formation of two damping cavity chamber pressures to piston head, acting, mechanical energy is converted into heat energy, thereby reach the object that absorbs outside energy, therefore can be widely used in damping, buffering, the occasion of power consumption.But, once viscous damper meet with overload wait accident conditions, usually can be subject to very holocaust, cause later period maintenance or replacing quantity more, cost is higher.
Therefore, be badly in need of providing a kind of novel viscous damper.
Model utility content
(1) technical problem that will solve
The purpose of this utility model is to provide a kind of viscous damper with overload protection function, to overcome the defect that in prior art, viscous damper is damaged in the time there is the accidents such as overload.
(2) technological scheme
For solving the problems of the technologies described above, the utility model provides a kind of viscous damper, comprise gray iron, piston rod, piston head, guide sleeve, sealing and viscous damping liquid, described cylinder body and described cylinder cap form damping cavity, described damping cavity is separated into the first damping chamber and the second damping chamber by described piston head, wherein, on described piston head, be provided with through hole, in described through hole, safety valve is installed, the two ends of described safety valve are connected with described the first damping chamber and described the second damping chamber respectively.
Wherein, described safety valve comprises:
(1) valve pocket, the top of described valve pocket is uncovered, and bottom is provided with liquid outlet, and the inside of described valve pocket is provided with valve pocket;
(2) fixed block, described fixed block is fixed on the top of described valve pocket, on described fixed block, is provided with axial hole;
(3) spool, described spool is positioned at the bottom of described valve pocket, described spool towards a side of described fixed block be provided with described fixed block on the sealing surface that is connected of axial hole;
(4) spring, described spring is positioned at the side of described spool away from described fixed block, and the two ends of described spring are connected with the bottom of described valve pocket with described spool respectively.
Wherein, described valve pocket comprises uuper valve chamber and is communicated with described uuper valve chamber and transverse dimension is less than the lower valve chamber of described uuper valve chamber; Described fixed block leans against between described lower valve chamber and described hole back-up ring with back-up ring folder by hole.
Wherein, on described piston head, be provided with two safety valves of oppositely installing.
Wherein, be provided with from the outwardly holding division of described valve pocket outer wall on the top of the valve pocket outer wall of described safety valve, be provided with groove in the bottom of described valve pocket outer wall, the distance between described holding division and described groove equals the thickness of described piston head.
Wherein, be respectively arranged with groove in described valve pocket outer wall upper and lower, the distance between described two grooves equals the thickness of described piston head.
Wherein, described piston head and described safety valve are threaded connection.
Wherein, described guide sleeve and described sealing adopt high temperature resistant, high pressure resistant, high-abrasive material.
Wherein, described viscous damping liquid is organic silicone oil.
Wherein, described viscous damper outer surface is through antirust processing.
(3) beneficial effect
The viscous damper that technique scheme provides, by mounting safety valve on piston head, so that proper viscous damper is under nominal situation, arranged at safety valve is in normally off, but when viscous damper is under the accident conditionses such as overload, safety valve will be opened pressure release, destroys in case viscous damper internal pressure transfinites.In addition, this apparatus structure is simple, easily manufactured.Further, two safety valves of oppositely installing are installed on piston head, further to improve the Security of viscous damper.
Brief description of the drawings
Fig. 1 is the structural representation of viscous damper of the present utility model;
Fig. 2 is the structural representation of the safety valve in viscous damper of the present utility model;
Fig. 3 is the partial schematic diagram of viscous damper of the present utility model under nominal situation;
Fig. 4 is the partial schematic diagram of viscous damper of the present utility model under overload operating mode.
Wherein: 1-cylinder body; 2-the first cylinder cap; 3-piston rod; 4-piston head; 5-the second cylinder cap; 6-the first link; 7-the second link; 8-safety valve; 81-valve pocket; 82-spool; 83-spring; 84-hole back-up ring; 85-fixed block; 86-groove; 9-shaft block ring; 10-sealing; 11-guide sleeve; 12-hole back-up ring; 13-O shape seal ring; 14-the first damping chamber; 15-the second damping chamber.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
Figure 1 shows that a preferred embodiment of a kind of viscous damper of the present utility model.According to this embodiment, this viscous damper comprises cylinder body 1, lays respectively at the first cylinder cap 2 and second cylinder cap 5 at cylinder body 1 two ends, and the cylinder cap at cylinder body 1 and two ends forms airtight damping cavity, has received viscous damping liquid in damping cavity content.Piston rod 3 extend in cylinder body 1 through the cylinder cap of both sides, and the surface of contact place of piston rod 3 and the first cylinder cap 2, the second cylinder cap 5 is respectively arranged with sealing 10, to ensure the sealing of piston rod 3 in movement process.On piston rod 3 in cylinder body 1, be provided with piston head 4, and move reciprocatingly in the airtight damping cavity being formed by cylinder body 1 and cylinder cap.Piston head 4 is divided into the first damping chamber 14 and the second damping chamber 15, the first damping chambers 14 and the second damping chamber 15 by damping cavity and is communicated with by the damping clearance between piston head 4 and cylinder body 1 inwall.In addition, safety valve 8 is installed on piston head 4, the two ends of this safety valve 8 are connected with the first damping chamber 14 and the second damping chamber 15 respectively, two safety valves of oppositely installing are preferably installed on piston head, further to improve the Security of viscous damper.In the time of the moving generation of exterior object shake (shaking), the piston rod 3 being connected with exterior object drives the piston head 4 above it to move reciprocatingly in the airtight damping cavity of cylinder body 1, being enclosed within the indoor viscous damping liquid of pressurized one side damping cavity is squeezed, pressure raises, in the time that viscous damper external load exceedes load rating, when pressure difference exceedes the rated pressure of safety valve 8, safety valve 8 is opened pressure release, now, viscous damping liquid is not only communicated with but also is communicated with by Protective valve 8 by the gap between piston head 4 and cylinder body 1 inwall, thereby effectively prevent that viscous damper is damaged.
Viscous damper is in the above-described embodiments two rod clearance type viscous dampers, it will be appreciated by those skilled in the art that viscous damper in the utility model is also applicable to two rod hole formula viscous dampers or single rod hole formula viscous damper or single rod clearance type viscous damper.
In order to prevent that the indoor viscous damping liquid of damping cavity from leaking, and seals by O-ring seals 13 respectively between the first cylinder cap 2, the second cylinder cap 5 and cylinder body 1.
Further, in order to ensure the straight path of piston rod 3 in movement process, in the first cylinder cap 2, the second cylinder cap 5, be respectively arranged with guide sleeve 11, piston rod 3 is connected via guide sleeve 11 and cylinder cap.
In addition, viscous damper is also provided with and is positioned at described viscous damper two ends, for the first link 6 and the second link 7 that are connected with the object of outside need damping (shaking), wherein, the first link 6 is connected with the first cylinder cap 2 by screw thread, and the second link 7 is threaded connection with piston rod 3.
Figure 1 shows that a preferred embodiment of a kind of safety valve for viscous damper of the present utility model.According to this embodiment, this safety valve comprises valve pocket 81 and is positioned at the spool 82 of valve pocket 81, spring 83 and fixed block 85.
Wherein, the top of valve pocket 1 is uncovered, and bottom is provided with liquid outlet.The inside of valve pocket 81 forms a valve pocket, and above-mentioned valve pocket forms axial passage.Fixed block 85 is fixed on the top of valve pocket, on fixed block 85, is provided with axial hole.Spool 82 is positioned at the bottom of valve pocket, for closure or openness axial passage.Particularly, spool 82 towards a side of fixed block 85 be provided with can with fixed block 85 on the plug that is connected of axial hole, this plug can be cylindrical boss or conical boss.Spring 83 is positioned at the side of spool 82 away from fixed block 85, and its two ends are connected with the bottom of spool 82 and valve pocket 81 respectively.By Compress Spring 83, spool 82 can slide in the valve pocket of valve pocket 81, so that plug and axial hole on spool 82 are connected, be that plug on spool 82 can be inserted in axial hole, and through hole moves up and down vertically, in the time that plug is positioned at axial hole, the axial passage in valve pocket can be cut off.
Particularly, valve pocket is divided into uuper valve chamber and is communicated with uuper valve chamber and transverse dimension is less than the lower valve chamber of uuper valve chamber, and fixed block 85 is positioned at the uuper valve chamber of valve pocket 81, and uses back-up ring 84 folders to lean against between lower valve chamber and hole back-up ring 84 by hole.It should be noted that, fixed block 85 also can be threaded connection and be fixed in valve pocket.
Further, in order to improve the anti-wear of surface of contact between cylindrical boss on spool 82 and fixed block 84, extend the working life of safety valve, preferably spool 82 and fixed block 84 form by Hardmetal materials is refining.
Further, top at valve pocket 81 outer walls is provided with the holding division outwardly from valve pocket outer wall, be provided with groove 86 in the bottom of valve pocket outer wall, distance between this holding division and groove 86 equals the thickness of piston head 4, to safety valve 8 is inserted in the mounting hole of piston head 4 of viscous damper, and insert in groove fixing safety valve 8 by shaft block ring 9.
In another embodiment, be respectively arranged with groove in valve pocket 81 outer wall upper and lowers, distance between these two grooves equals the thickness of piston head 4, to safety valve 8 is fixed on the piston head 4 of viscous damper by shaft block ring 9 respectively at the two ends of safety valve 8.
In an embodiment again, on valve pocket 81 outer walls, be provided with screw thread (not shown), to be threaded connection, safety valve 8 is arranged on the piston head 4 of viscous damper.
Preferably the viscous damping liquid in damping cavity is organic silicone oil, because it has, viscosity is large, flash-point is high, good thermal stability, and its viscosity with temperature variance ratio is little, be difficult for the advantages such as aging.
Further, in order to prevent that viscous damper from getting rusty, preferably the outer surface of viscous damper is carried out to antirust processing.
Figure 3 shows that the partial schematic diagram of viscous damper under nominal situation.Under nominal situation, under the effect of external force F, when piston rod 3 is moved to the second damping chamber 15 by the first damping chamber 14, the second damping chamber 15 smaller volume, the viscous damping liquid holding in it is compressed, therefore cause the pressure in the second damping chamber 15 to increase, and the volume of the first damping chamber 14 increases, cause pressure to reduce, thereby force viscous damping liquid to be flowed to the first damping chamber 14 by the second damping chamber 15.Now; the power on spool 82 of acting on is less than the precompression of spring 83; Protective valve is in closed state; viscous damping liquid is flowed to the first damping chamber 14 by the second damping chamber 15 by the gap between piston head 4 and cylinder body 1 inwall; because viscous damping fluid viscosity is large, in flowing, produce great viscous damping force, the direction of damping force is contrary with the moving direction of piston rod 3; thereby make vibrational energy be converted into rapidly heat energy and discharge, reach the object of energy-dissipating and shock-absorbing (shaking).In whole movement process, Protective valve 8 is always in closed state, inoperative.In the time that piston rod 3 is moved to the first damping chamber 14 by the second damping chamber 15, working principle is the same, just the opposite direction of viscous damping liquid and viscous damping force.
Figure 4 shows that the partial schematic diagram of viscous damper under overload operating mode.Under overload operating mode, under the effect of external force F, in the time that piston rod 3 is moved to the second damping chamber 15 by the first damping chamber 14, the second damping chamber 15 smaller volume, the viscous damping liquid holding in it is compressed, therefore causes the pressure in the second damping chamber 15 to increase rapidly, and the volume of the first damping chamber 14 increases, cause pressure to reduce, thereby force viscous damping liquid to be flowed to the first damping chamber 14 by the second damping chamber 15.Now; act on power on spool 82 precompression much larger than spring 83; spring 83 is compressed; the endoporus of the cylndrical surface of spool 82 and fixed block 85 is thrown off; Protective valve 8 is opened; a part for viscous damping liquid in the second damping chamber 15 is flowed to the first damping chamber 14 by the second damping chamber 15 by safety valve 8; another part is flowed to the first damping chamber 14 by the second damping chamber 15 by the gap between piston head 4 and cylinder body 1 inwall; thereby reach the pressure in rapid reduction the second damping chamber 15, to play the effect of protection viscous damper.
Above mode of execution is only for the utility model is described, and is not limitation of the utility model, and the those of ordinary skill in relevant technologies field, in the situation that not departing from spirit and scope of the present utility model, can also make a variety of changes and modification.Therefore all technological schemes that are equal to also belong to protection category of the present utility model.
Claims (10)
1. a viscous damper, comprise gray iron, piston rod, piston head, guide sleeve, sealing and viscous damping liquid, described cylinder body and described cylinder cap form damping cavity, described damping cavity is separated into the first damping chamber and the second damping chamber by described piston head, it is characterized in that, on described piston head, be provided with through hole, in described through hole, safety valve be installed, the two ends of described safety valve are connected with described the first damping chamber and described the second damping chamber respectively.
2. viscous damper according to claim 1, is characterized in that, described safety valve comprises:
(1) valve pocket, the top of described valve pocket is uncovered, and bottom is provided with liquid outlet, and the inside of described valve pocket is provided with valve pocket;
(2) fixed block, described fixed block is fixed on the top of described valve pocket, on described fixed block, is provided with axial hole;
(3) spool, described spool is positioned at the bottom of described valve pocket, described spool towards a side of described fixed block be provided with described fixed block on the sealing surface that is connected of axial hole;
(4) spring, described spring is positioned at the side of described spool away from described fixed block, and the two ends of described spring are connected with the bottom of described valve pocket with described spool respectively.
3. viscous damper according to claim 2, is characterized in that, described valve pocket comprises uuper valve chamber and is communicated with described uuper valve chamber and transverse dimension is less than the lower valve chamber of described uuper valve chamber; Described fixed block leans against between described lower valve chamber and described hole back-up ring with back-up ring folder by hole.
4. viscous damper according to claim 3, is characterized in that, is provided with two safety valves of oppositely installing on described piston head.
5. viscous damper according to claim 4, it is characterized in that, top at the valve pocket outer wall of described safety valve is provided with from the outwardly holding division of described valve pocket outer wall, bottom at described valve pocket outer wall is provided with groove, and the distance between described holding division and described groove equals the thickness of described piston head.
6. viscous damper according to claim 4, is characterized in that, is respectively arranged with groove in described valve pocket outer wall upper and lower, and the distance between described two grooves equals the thickness of described piston head.
7. viscous damper according to claim 4, is characterized in that, described piston head and described safety valve are threaded connection.
8. according to the viscous damper described in any one in claim 1-7, it is characterized in that, described guide sleeve and described sealing adopt high temperature resistant, high pressure resistant, high-abrasive material.
9. according to the viscous damper described in any one in claim 1-7, it is characterized in that, described viscous damping liquid is organic silicone oil.
10. according to the viscous damper described in any one in claim 1-7, it is characterized in that, described viscous damper outer surface is through antirust processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860523.4U CN203656014U (en) | 2013-12-24 | 2013-12-24 | Viscous damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860523.4U CN203656014U (en) | 2013-12-24 | 2013-12-24 | Viscous damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203656014U true CN203656014U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320860523.4U Expired - Lifetime CN203656014U (en) | 2013-12-24 | 2013-12-24 | Viscous damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203656014U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671676A (en) * | 2013-12-24 | 2014-03-26 | 北京九州一轨隔振技术有限公司 | Viscous damper |
| CN106838099A (en) * | 2017-01-06 | 2017-06-13 | 中铁大桥科学研究院有限公司 | The method for designing and damper of a kind of multi-functional viscous damper of variable element |
-
2013
- 2013-12-24 CN CN201320860523.4U patent/CN203656014U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671676A (en) * | 2013-12-24 | 2014-03-26 | 北京九州一轨隔振技术有限公司 | Viscous damper |
| CN106838099A (en) * | 2017-01-06 | 2017-06-13 | 中铁大桥科学研究院有限公司 | The method for designing and damper of a kind of multi-functional viscous damper of variable element |
| CN106838099B (en) * | 2017-01-06 | 2019-02-26 | 中铁大桥科学研究院有限公司 | A kind of design method and damper of the multi-functional viscous damper of variable element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 102402 No.32, Guangmao Road, Doudian Town, Fangshan District, Beijing Patentee after: Beijing Jiuzhou first rail Environmental Technology Co.,Ltd. Address before: 100026, Beijing Zhongguancun Daxing District science and Technology Park Daxing pharmaceutical industry base, Tianhe West Road, No. 28, a 1-2 floor Patentee before: BEIJING JIUZHOUYIGUI SHOCK AND VIBRATION ISOLATION Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |
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| CX01 | Expiry of patent term |