CN111734769B - High-temperature-resistant zero-leakage viscous damping shock absorber - Google Patents
High-temperature-resistant zero-leakage viscous damping shock absorber Download PDFInfo
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- CN111734769B CN111734769B CN202010418093.5A CN202010418093A CN111734769B CN 111734769 B CN111734769 B CN 111734769B CN 202010418093 A CN202010418093 A CN 202010418093A CN 111734769 B CN111734769 B CN 111734769B
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- cylinder body
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- piston rod
- temperature resistant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/361—Sealings of the bellows-type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/362—Combination of sealing and guide arrangements for piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a high-temperature-resistant zero-leakage viscous damping shock absorber which comprises a cylinder body and a piston arranged in the cylinder body, wherein the piston can slide along the inner wall of the cylinder body, spaces in the cylinder body on two sides of the piston can be communicated, the piston is fixedly connected with a piston rod, the piston rod penetrates out of one side of the cylinder body, the piston rod is in clearance fit with a through hole in the cylinder body, a compensation cavity is arranged on one side of the piston rod, which penetrates out of the cylinder body, one end of the compensation cavity is fixedly connected with the cylinder body in a sealing manner, the other end of the compensation cavity is fixedly connected with the piston rod, when the piston rod slides along the through hole in the cylinder body, the compensation cavity can deform to change the volume in the cavity, and the cylinder body and the compensation cavity are filled with communicated viscous media. The shock resistance of the shock absorber has no threshold value, can be used in harsh environments such as high temperature, vacuum and the like, and the whole shock absorber has no dynamic sealing structure and can realize zero leakage.
Description
Technical Field
The invention belongs to the technical field of anti-vibration devices, and particularly relates to a high-temperature-resistant zero-leakage viscous damping anti-vibration device.
Background
The anti-seismic device has the advantages that when equipment needing to be protected is subjected to instant impact of dynamic load, the equipment can be quickly changed into a rigid structure, the supported equipment is prevented from being damaged due to excessive displacement generated after accidental impact, and the purposes of supporting and resisting seismic are achieved; when the equipment is in a normal working condition, the anti-vibration device can compensate the thermal expansion and cold contraction displacement of the equipment and the supporting member caused by temperature change, and does not generate resistance and constraint action on the equipment.
When the equipment needing protection is in a high-temperature environment, the requirements for the supporting function of the shock absorber for resisting instant impact and the compensation function of the expansion and contraction of the component caused by temperature change are more outstanding.
At present, a mechanical scheme is adopted for the shock absorber in a high-temperature environment, and the principle of realizing the function of the shock absorber can be similar to the mechanism of locking of an automobile safety belt due to rapid stretching. When the acceleration of the telescopic motion of the equipment supporting member reaches a certain limit value, the mechanical shock absorber is locked, and the supporting member becomes rigid so as to form fixed support for the equipment.
The high-temperature mechanical anti-seismic device is characterized in that the process of converting from a telescopic state to a rigid locking state is abrupt, although the displacement of equipment needing anti-seismic protection is limited in the locking state, the equipment is instantaneously impacted by suddenly formed supporting force. In addition, when the mechanical shock absorbers are used in pairs or multiple groups, the acceleration thresholds of the shock absorbers are difficult to be completely consistent, so that the locking moments of the shock absorbers are different, and the supported equipment is adversely impacted.
The other common shock absorber is a viscous damper, the viscous damper generally adopts a hydraulic cylinder type structure, a cylinder body is divided into two cavities by a piston, viscous liquid is filled in the cavities, and the two cavities can exchange flow through valve holes or gaps. The conventional viscous damper is difficult to be applied to a high-temperature environment, the requirement on the sealing property of the cylinder body is high, particularly, the dynamic sealing structure is adopted at the through hole position of the cylinder body and the piston rod, the liquid leakage phenomenon is easy to generate, and the complex dynamic sealing structure further increases the manufacturing cost of the damper.
Disclosure of Invention
The invention aims to provide a viscous damping anti-vibration device used in a high-temperature environment aiming at the defects of the prior art, overcomes the defects of a dynamic sealing structure of a conventional viscous damper, and realizes zero leakage of a viscous medium.
The technical scheme of the invention is as follows: the utility model provides a high temperature resistant zero leakage viscous damping antidetonation ware, includes the cylinder body and arranges the piston in the cylinder body in, and the piston can slide along the cylinder body inner wall, and the cylinder body inner space of piston both sides can communicate, piston and piston rod fixed connection, the piston rod is worn out from cylinder body one side, adopt clearance fit between the through hole of piston rod and cylinder body, be equipped with the compensation chamber in one side that the cylinder body was worn out to the piston rod, the one end in compensation chamber with the sealed fixed connection of cylinder body, the other end with piston rod fixed connection, when the through hole of piston rod along the cylinder body slides, the compensation chamber can take place to warp and then change the intracavity volume the viscous medium that cylinder body and compensation intracavity are full of the intercommunication.
Further, as mentioned above, the high temperature resistant zero leakage viscous damping anti-seismic device, wherein the compensation chamber is a bellows, one end of the bellows surrounds the through hole and is connected in a sealing manner, and the other end of the bellows is connected with the piston rod in a sealing manner, and both are static sealing structures.
Further, as mentioned above, the high temperature resistant zero leakage viscous damping anti-vibration device adopts clearance fit between the inner wall of the cylinder and the piston.
Further, as for the high-temperature-resistant zero-leakage viscous damping shock absorber, the cylinder inner spaces and the compensation cavity spaces on the two sides of the piston are in a communicated state, and a viscous medium can flow through the gap between the piston and the inner wall of the cylinder and the gap between the piston rod and the through hole of the cylinder.
Further, the high-temperature-resistant zero-leakage viscous damping shock absorber is characterized in that the viscous medium is high-temperature-resistant liquid; the high-temperature resistant liquid can be high-temperature resistant oil, mercury, lead-bismuth alloy or sodium-potassium alloy.
Further, as mentioned above, the cylinder body is fixedly connected with the cylinder body connecting rod.
The invention has the following beneficial effects:
(1) the shock resistance of the shock absorber provided by the invention has no threshold value, the mechanical property is good, and no extra impact is caused to equipment needing shock resistance protection;
(2) the anti-seismic device can be used in harsh environments such as high temperature, vacuum and the like;
(3) the liquid metal in the anti-vibration device is completely positioned in the static sealing cavity, and the whole anti-vibration device has no dynamic sealing structure, so that zero leakage of the liquid metal can be realized;
(4) the anti-seismic device has simple structure, easy manufacture and low cost;
(5) the anti-seismic device has good consistency of mechanical properties and high reliability when used in pairs or multiple groups.
Drawings
Fig. 1 is a schematic structural view of a high-temperature resistant zero-leakage viscous damping anti-seismic device according to an embodiment of the invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The invention provides a viscous damping shock absorber for a high-temperature environment, which comprises a cylinder body and a piston arranged in the cylinder body, wherein the piston can slide along the inner wall of the cylinder body, and the spaces in the cylinder body at two sides of the piston can be communicated. Can make piston both sides cylinder inner space intercommunication through the mode that sets up the valve opening on the piston, also can make piston both sides cylinder inner space intercommunication through adopting clearance fit's mode between cylinder inner wall and the piston, two cavity accessible valve openings or clearance exchange flow. The cylinder body and cylinder body connecting rod fixed connection, piston and piston rod fixed connection, the piston rod is worn out from cylinder body one side, adopt clearance fit between the through hole of piston rod and cylinder body, the one side that the cylinder body was worn out at the piston rod is equipped with the compensation chamber that can take place to warp under internal force or exogenic action, the one end in compensation chamber with cylinder body fixed connection, the other end with piston rod fixed connection, when the through hole of piston rod edge cylinder body slides, the compensation chamber can take place to warp and then change the intracavity volume the cylinder body is full of the viscous medium with the compensation intracavity. The viscous medium can flow through the clearance between the piston rod and the through hole of the cylinder body. In the invention, the viscous medium adopts liquid metal, and the anti-vibration device can be used for anti-vibration or anti-impact support of equipment in high-temperature environment under atmosphere or vacuum by utilizing the high-temperature resistance characteristic of the liquid metal.
The invention can compensate the expansion of the supporting component by using the volume change of the compensation cavity because the compensation cavity structure is arranged at one side of the cylinder body, provides supporting counter force by using the metal liquid pressure difference at two sides of the piston, and resists the axial movement of the piston by using the viscous resistance of the liquid metal. The compensation cavity can be designed by adopting a metal corrugated pipe or other deformable structures, such as a sleeve-like structure, and the inner pipe and the outer pipe are connected in a sealing way through a flexible part. The compensation chamber changes volume through deformation, so that relative movement between the cylinder connecting rod and the piston rod is compensated.
Examples
The anti-shock device according to one embodiment of the present invention is constructed as shown in fig. 1, and the piston 3 is located at an intermediate position of the cylinder 2 in an initial state of the anti-shock device. The inner wall of the cylinder body 2 and the piston 3 are in clearance fit, and the piston 3 can slide along the inner wall of the cylinder body 2. The cylinder body 2 is fixed with the cylinder body connecting rod 1, the piston 3 is fixed with the piston rod 5, the piston rod 5 penetrates through the cylinder body 2, the piston rod 5 is in clearance fit with a through hole of the cylinder body 2, and the piston rod 5 can slide along the through hole of the cylinder body 2. The right end face of the corrugated pipe 4 is fixedly connected with the through hole of the cylinder body 2 in a sealing mode, and the left end of the corrugated pipe 4 is connected with the piston rod 5 in a sealing mode. The closed cavity formed by the cylinder body 2 and the corrugated pipe 4 is filled with low-melting-point liquid metal 6 (such as mercury or lead bismuth alloy or sodium potassium alloy) without gaps, and can also be filled with high-temperature-resistant oil. The liquid metal 6 is in communication in the three chambers due to the clearance between the piston 3 and the inner wall of the cylinder 2 and the clearance between the piston rod 5 and the through hole of the cylinder 2.
When the connecting rods at two ends of the shock absorber bear slow stretching or compression acting force due to slow expansion or contraction of an equipment supporting component caused by temperature change, liquid metal 6 in each cavity can flow through a gap between the piston 3 and the inner wall of the cylinder body 2 and a gap between the piston rod 5 and a through hole of the cylinder body 2, and the corrugated pipe 4 deforms along with the relative movement between the piston rod 5 and the cylinder body connecting rod 1, so that the volume of the corrugated pipe is changed, and the relative movement between the cylinder body connecting rod 1 and the piston rod 5 is compensated. Since the compensation movement is slow, the viscous resistance of the liquid metal flowing through the gap is negligible, and the resistance to the change in volume of the bellows 4 is not large, the shock absorber has little resistance to compensating temperature changes.
When the equipment is subjected to earthquake or accidental impact, the equipment supporting member applies rapid stretching or compressing acting force to the connecting rods at two ends of the shock absorber, the pressure difference at two ends of the piston 3 in the cylinder body 2 provides supporting counter force, the pressure difference forces the liquid metal 6 to rapidly flow between the chambers through the gaps between the piston 3 and the inner wall of the cylinder body 2 and the gaps between the piston rod 5 and the through hole of the cylinder body 2, the viscous resistance of the liquid metal resists the axial movement of the piston, the larger the movement rate is, the larger the resistance is, the smaller the sliding displacement of the piston 3 in the cylinder body 2 in a short time is, and therefore the equipment is supported. The deformation of bellows 4 changes the volume to counteract the stress on bellows 4 due to the momentarily increased or decreased liquid metal pressure within bellows 4. The gap between the cylinder body 2 and the piston 3 and the gap between the piston rod 5 and the through hole of the cylinder body 2 directly influence the mechanical properties of the stretching or compression of the shock absorber.
By utilizing the high-temperature resistance of the liquid metal, the anti-vibration device can be used for anti-vibration support of equipment in high-temperature environment under atmosphere or vacuum.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims (5)
1. The utility model provides a high temperature resistant zero leakage viscous damping antidetonation ware, includes cylinder body (2) and arranges piston (3) in cylinder body (2) in, and piston (3) can be followed cylinder body (2) inner wall and slided, and the cylinder body inner space of piston (3) both sides can communicate, piston (3) and piston rod (5) fixed connection, its characterized in that is worn out in cylinder body (2) one side in piston rod (5): adopt clearance fit between cylinder body (2) inner wall and piston (3), adopt clearance fit between the through hole of piston rod (5) and cylinder body (2), the one side of wearing out cylinder body (2) at piston rod (5) is equipped with the compensation chamber, the one end in compensation chamber with the sealed fixed connection of cylinder body (2), the other end with piston rod (5) fixed connection, when piston rod (5) slided along the through hole of cylinder body (2), the compensation chamber can take place to warp and then change the intracavity volume cylinder body (2) and the compensation intracavity are full of viscous medium (6) of intercommunication, and viscous medium can flow through the clearance of piston (3) and cylinder body (2) inner wall and the clearance of piston rod (5) and cylinder body (2) through hole.
2. The high temperature resistant zero leakage viscous damping anti-seismic device of claim 1, characterized by: the compensation cavity is a corrugated pipe (4), one end of the corrugated pipe (4) surrounds the through hole and is in sealing connection, and the other end of the corrugated pipe is in sealing connection with the piston rod (5).
3. The high temperature resistant zero leakage viscous damping anti-seismic device of claim 1, characterized by: the viscous medium (6) is high-temperature-resistant liquid.
4. A high temperature resistant zero leakage viscous damping anti-seismic device as defined in claim 3, wherein: the high-temperature resistant liquid can be high-temperature resistant oil, mercury, lead-bismuth alloy or sodium-potassium alloy.
5. The high temperature resistant zero leakage viscous damping anti-seismic device of claim 1, characterized by: the cylinder body (2) is fixedly connected with the cylinder body connecting rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010418093.5A CN111734769B (en) | 2020-05-18 | 2020-05-18 | High-temperature-resistant zero-leakage viscous damping shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010418093.5A CN111734769B (en) | 2020-05-18 | 2020-05-18 | High-temperature-resistant zero-leakage viscous damping shock absorber |
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| Publication Number | Publication Date |
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| CN111734769A CN111734769A (en) | 2020-10-02 |
| CN111734769B true CN111734769B (en) | 2021-08-20 |
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| CN202010418093.5A Active CN111734769B (en) | 2020-05-18 | 2020-05-18 | High-temperature-resistant zero-leakage viscous damping shock absorber |
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Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR1166482A (en) * | 1956-11-14 | 1958-11-12 | Renault | Improvements to shock absorbers used in vehicle suspension |
| JPS6073145A (en) * | 1983-09-30 | 1985-04-25 | Sanwa Tekki Corp | Rod-enclosed-type hydraulic vibration |
| KR0123665Y1 (en) * | 1995-12-09 | 1998-09-15 | 정몽원 | Abnormal flow-line cutoff device for shock-absorber |
| CN2495849Y (en) * | 2001-09-17 | 2002-06-19 | 上海天通铁路车辆配件有限公司 | Sealing structure for oildraulic shock-absorber |
| JP2004176851A (en) * | 2002-11-28 | 2004-06-24 | Fujikura Rubber Ltd | Vibration isolation table |
| CN1967010A (en) * | 2006-11-15 | 2007-05-23 | 深圳市中车业成实业有限公司 | Oil pressure damper for use in rail-bound locomotive and vehicle |
| KR101382346B1 (en) * | 2008-05-23 | 2014-04-08 | 현대자동차 주식회사 | Shock absorber for vehicle |
| DE102009049319A1 (en) * | 2009-10-14 | 2011-04-21 | Bayerische Motoren Werke Aktiengesellschaft | Piston rod sealing device, has lip seal separating low pressure side and ambient pressure side and staying in sliding contact with piston rod, and reverses defined displacement path opposite to gap seal with piston rod |
| CN201651148U (en) * | 2010-03-26 | 2010-11-24 | 北京工业大学 | Anti-leak damper |
| CN101956780B (en) * | 2010-09-14 | 2012-01-25 | 广州大学 | Viscous damper |
| JP6212340B2 (en) * | 2013-09-24 | 2017-10-11 | Ｋｙｂ株式会社 | Shock absorber and suspension system |
| CN104895994B (en) * | 2015-06-24 | 2017-04-26 | 上海赛弗工程减震技术有限公司 | Leak-proof multiple-seal viscous damper |
| CN208107050U (en) * | 2018-03-09 | 2018-11-16 | 柳州欧维姆机械股份有限公司 | A kind of flexible closed type fluid linking damper |
| CN110173534A (en) * | 2019-05-16 | 2019-08-27 | 东南大学 | A kind of multi-direction vibration damping Effects of Viscous Fluid Damper and its working method of No leakage |
| CN110307282A (en) * | 2019-06-24 | 2019-10-08 | 南京航空航天大学 | Zero nonlinear isolation device of pneumatic standard |
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2020
- 2020-05-18 CN CN202010418093.5A patent/CN111734769B/en active Active
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