CN104930105A - Hydraulic damper - Google Patents
Hydraulic damper Download PDFInfo
- Publication number
- CN104930105A CN104930105A CN201410102860.6A CN201410102860A CN104930105A CN 104930105 A CN104930105 A CN 104930105A CN 201410102860 A CN201410102860 A CN 201410102860A CN 104930105 A CN104930105 A CN 104930105A
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- CN
- China
- Prior art keywords
- piston
- annular
- cylinder body
- ring
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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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
- F16F9/368—Sealings in pistons
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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
- F16F9/48—Arrangements for providing different damping effects at different parts of the stroke
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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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a hydraulic damper comprising a cylinder body having a sealed internal cavity, a piston and a piston rod. A sealing ring cavity and a piston sealing ring sleeve are arranged on a cylindrical surface of a piston body in the hydraulic damper; total drift diameters of damping holes on two side walls an annular groove are unequal; two side surfaces of the piston sealing ring and opposite to two side walls of the annular groove are respectively provided with an annular sealing surface cooperated with the two side walls of the annular groove; and when the piston is pulled back and forth, the annular sealing surfaces on two sides and the two side walls of the annular groove cooperate to switchably connect drift diameters of medium flow paths of a first work cavity and a second work cavity, so different damping force when the piston is pulled back and forth is achieved.
Description
Technical field
The present invention relates to a kind of damping device, specifically a kind of hydraulic damper, particularly a kind of hydraulic damper of single rod.
Background technique
The use field of hydraulic damper widely, as all having a large amount of utilization in pipeline, the traffic tool, building and furniture industry, be used for antidetonation, shock resistance time as damping device.The basic structure of hydraulic damper is all comprise the cylinder body being provided with sealed internal chamber, piston and a piston rod usually, described piston is arranged in the inner chamber of cylinder body, piston rod penetrates in the inner chamber of cylinder body and is fixedly connected with piston, the internal chamber wall fluid-tight contact of piston and cylinder body also can along lumen shaft to slippage back and forth, described lumen segmentation is become two active chambers, the first active chamber and the second active chamber respectively, fill hydraulic medium in described first active chamber and the second active chamber, described piston is provided with the medium runner of the first active chamber and the second active chamber described in UNICOM.During hydraulic damper work, piston rod drives piston to move, and changes the volume of the first active chamber and the second active chamber, and hydraulic medium wherein flows to the large side of change through medium runner from the side of smaller volume.Because liquid medium has the substantially incompressible characteristic of volume, therefore the pace of change of volume limits by the latus rectum of medium runner, the speed of Volume Changes can be set by arranging suitable medium runner latus rectum, also the relative displacement namely between cylinder body and piston rod, reaches the object of impact-reducing, antidetonation.Can be learnt by above-mentioned introduction, in order to hydraulic damper normally works, hydraulic medium will be full of active chamber, is to have air in active chamber, not so can cause occurring idle running and the jiggly phenomenon of displacement.Its structural feature of hydraulic damper of so-called single rod is that piston rod only has one end to stretch out from cylinder body, and the other end is fixedly connected with the piston in cylinder body.Due to structural restriction, when piston rod push-and-pull piston moves around, because the piston rod portion volume entered in active chamber is becoming always, the Volume Changes of the first active chamber and the second active chamber is also unequal, easily have air in the hydraulic damper active chamber of therefore single rod, cause idle running or leakage of oil.On the other hand, due to the difference of use occasion, require that hydraulic damper has the damping force of different size in round both direction sometimes.
Summary of the invention
The object of the invention is to provide a kind of hydraulic damper in round both direction with the damping force of different size for overcoming the deficiencies in the prior art.
In order to achieve the above object, the invention discloses a kind of hydraulic damper, comprise the cylinder body that is provided with sealed internal chamber, piston and piston rod, described piston is arranged in the inner chamber of cylinder body, piston rod one end penetrates in the inner chamber of cylinder body and is fixedly connected with piston, the internal chamber wall fluid-tight contact of piston and cylinder body also can along lumen shaft to slippage back and forth, described lumen segmentation is become two active chambers, the first active chamber and the second active chamber respectively, hydraulic medium is filled in described first active chamber and the second active chamber, described piston is provided with the medium runner of the first active chamber and the second active chamber described in UNICOM, it is characterized in that: described piston comprises piston body and piston packing ring, described piston body coordinates with the inner chamber interval of cylinder body, the cylinder of described piston body is provided with the recessed grain of annular and forms seal ring cavity volume 303, described piston packing ring is set in seal ring cavity volume 303, the external diameter of described piston packing ring and the internal chamber wall of cylinder body seal fits, the internal diameter of piston packing ring and the recessed poor groover rot diameter Spielpassung of annular, the groove width of the recessed grain of described annular is greater than the thickness of described piston packing ring, the two side of the recessed grain of described annular is respectively equipped with through damping hole, on the two side of the recessed grain of described annular, total latus rectum sum of damping hole is unequal, the annular sealing surface matched in the two side that two sides that on described piston packing ring, the two side of grain recessed with annular is relative are respectively equipped with grain recessed with annular, described annular sealing surface is in the periphery of damping hole.
Compared with prior art, because in hydraulic damper of the present invention, the cylinder of piston body is provided with seal ring cavity volume 303 and piston seal ring set, on the two side of the recessed grain of described annular, total latus rectum sum of damping hole is unequal, the annular sealing surface matched in the two side that two sides that on described piston packing ring, the two side of grain recessed with annular is relative are respectively equipped with grain recessed with annular, when pulling piston after current, the annular sealing surface of both sides matches with the two side of the recessed grain of annular the latus rectum of the medium runner switching UNICOM first active chamber and the second active chamber, the object with different damping power is pulled before and after reaching.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Accompanying drawing 1 is specific embodiment of the invention perspective view;
Accompanying drawing 2 is specific embodiment of the invention internal structure sectional view;
Accompanying drawing 3 is accompanying drawing 2 I portion partial enlarged drawing;
Accompanying drawing 4 is provided with compensation mechanism specific embodiment internal structure sectional view for the present invention;
Accompanying drawing 5 is compensation mechanism, one of piston and piston rod perspective view;
Accompanying drawing 6 is compensation mechanism, piston and piston rod perspective view two;
Accompanying drawing 7 is compensation mechanism, piston and piston rod stereochemical structure decomposing schematic representation.
Embodiment
As Figure 1-3, hydraulic damper of the present invention comprises the cylinder body 1 being provided with sealed internal chamber, piston and a piston rod 2, and described piston is arranged in the inner chamber of cylinder body 1.Described cylinder body 1 and inner chamber are preferably cylindrical, one end of cylinder body 1 is closed, the other end opening is also provided with end casing 8, described end casing 8 center is provided with the through hole inserted for piston rod 2, piston rod 2 one end (front end) penetrates in the inner chamber of cylinder body 1 and is fixedly connected with piston, the internal chamber wall fluid-tight contact of piston and cylinder body 1 also can along lumen shaft to slippage back and forth, described lumen segmentation is become former and later two active chambers, the first active chamber and the second active chamber respectively, hydraulic medium is filled in described first active chamber and the second active chamber, described piston is provided with the medium runner of the first active chamber and the second active chamber described in UNICOM, described piston comprises piston body 3 and piston packing ring 4, described piston body 3 coordinates with the inner chamber interval of cylinder body 1, the cylinder of described piston body 3 is provided with the recessed grain of annular and forms seal ring cavity volume 303, described piston packing ring 4 is set in seal ring cavity volume 303, the external diameter of described piston packing ring 4 and the internal chamber wall of cylinder body 1 seal fits, the internal diameter of piston packing ring 4 and the recessed poor groover rot diameter Spielpassung of annular, the groove width of the recessed grain of described annular is greater than the thickness of described piston packing ring 4, the two side of the recessed grain of described annular is respectively equipped with through damping hole, on the two side of the recessed grain of described annular, total latus rectum sum of damping hole is unequal, the annular sealing surface matched in the two side that two sides relative with the two side of the recessed grain of annular on described piston packing ring 4 are respectively equipped with grain recessed with annular, described annular sealing surface is in the periphery of damping hole.As shown in figures 2-6, in the present invention, described piston body 3 axial cross section is in " work " font, annular groove can be arranged form on columniform cylndrical surface, in two integrated disc portions before and after damping hole is arranged on, in this specific embodiment, the disk of front end arranges multiple through hole along concentric circle and forms large damping hole 301, the disk of rear end arranges a through hole form little damping hole 302(and can certainly arrange on the contrary, the direction of such damping force size is contrary), make total latus rectum sum of damping hole on the two side of the recessed grain of described annular unequal; Described piston packing ring 4 preferred center hole is shoulder hole, cross section is L-shaped, the annular sealing surface described in end face formation of both sides, the radius of piston packing ring 4 center-hole diameter smaller portions is greater than the distance of little damping hole 302 apart from piston rod 2 axle center, the radius of piston packing ring 4 center-hole diameter major part is greater than concentrically ringed radius residing for large damping hole 301, makes described annular sealing surface be in the periphery of damping hole; The external diameter of described piston packing ring 4 and the internal chamber wall of cylinder body 1 seal fits, gap is left between the internal diameter of piston packing ring 4 and the recessed poor bottom land of annular, the groove width of the recessed grain of described annular is greater than the thickness of described piston packing ring 4, piston packing ring 4 is made to have the space of slide anteroposterior, the annular sealing surface (i.e. both ends of the surface) matched in the two side that two sides relative with the two side of the recessed grain of annular on described piston packing ring 4 are respectively equipped with grain recessed with annular.
The working principle of this hydraulic damper is as follows: when pulling piston rod 2 outwards, described piston packing ring 4 is due to the effect of the frictional force between internal chamber wall, described piston packing ring 4 is close to the disk on front side of piston body 3, disk successively on rear side of piston body 3 of hydraulic medium in second active chamber and internal chamber wall and the gap between disk and piston packing ring 4 end face, the medium runner that large damping hole 301 in gap between piston packing ring 4 endoporus and piston rod 2 and piston body 3 front disc is formed flows into the first active chamber, its damping force is determined by large damping hole 301 latus rectum, when promoting piston rod 2 and being inside, described piston packing ring 4 is due to the effect of the frictional force between internal chamber wall, described piston packing ring 4 is close to the disk on rear side of piston body 3, the medium runner that little damping hole 302 on rear side of large damping hole 301 on the disk of hydraulic medium in first active chamber successively on front side of piston body 3, the gap between piston packing ring 4 endoporus and piston rod 2 and piston body 3 on disk is formed flows into the second active chamber, and its damping force is determined by little damping hole 302 latus rectum.Because little damping hole 302 latus rectum and large damping hole 301 latus rectum differ comparatively large, therefore the resistance of this hydraulic damper pull-out is round is less than the resistance pushed.
In order to make to be full of hydraulic medium all the time in the active chamber of hydraulic damper, there will not be idle running, further, compensation mechanism is provided with in the inner chamber of described cylinder body 1, as shown in figs. 4-7, the one end of specifically inserting near piston rod 2 in the inner chamber of described cylinder body 1 is provided with Compress Spring 7 and compensating piston ring 6, the both sides of described compensating piston ring 6 are fixed with limiting stopper, described Compress Spring 7 and compensating piston ring 6 are set on piston rod 2 slidably, in this specific embodiment, the front of compensating piston ring 6 is fixedly arranged with snap ring 5, snap ring 5 internal diameter is greater than piston rod 2 diameter, described snap ring 5 and end casing 8 form limiting stopper, one end of described Compress Spring 7 is flexibly against on compensating piston ring 6 end face and makes compensating piston ring 6 have the power sliding to piston one end, the other end is against on end casing 8, the inside and outside wall of described compensating piston ring 6 respectively with the internal chamber wall fluid-tight engagement of piston rod 2 and cylinder body 1, described compensating piston ring 6 is towards one end of piston and active chamber UNICOM.
Its working principle is: when pulling piston rod 2 outwards, because the volume increased in the first active chamber is greater than the volume reduced in the second active chamber simultaneously, namely the hydraulic medium in the first active chamber flowed in original second active chamber is inadequate, and now described Compress Spring 7 promotes compensating piston ring 6 and pushed in the second active chamber by the hydraulic medium in compensating piston ring 6 slipping space and compensate; When promoting piston rod 2 and being inside, because the volume reduced in the first active chamber is greater than the volume increased in the second active chamber simultaneously, namely the hydraulic medium in the second active chamber flowed in original first active chamber is too much not, now described Compress Spring 7 compensating piston ring 6 under the pressure of hydraulic medium promotes retreats, by the hydraulic medium that has more stored in compensating piston ring 6 slipping space.When compensating piston ring 6 slipping space Volume design is suitable, hydraulic medium will be full of all the time in the first active chamber of hydraulic damper and the second active chamber, therefore there will not be idle running.
Claims (3)
1. a hydraulic damper, comprise the cylinder body that is provided with sealed internal chamber, piston and piston rod, described piston is arranged in the inner chamber of cylinder body, piston rod one end penetrates in the inner chamber of cylinder body and is fixedly connected with piston, the internal chamber wall fluid-tight contact of piston and cylinder body also can along lumen shaft to slippage back and forth, described lumen segmentation is become two active chambers, the first active chamber and the second active chamber respectively, hydraulic medium is filled in described first active chamber and the second active chamber, described piston is provided with the medium runner of the first active chamber and the second active chamber described in UNICOM, it is characterized in that: described piston comprises piston body and piston packing ring, described piston body coordinates with the inner chamber interval of cylinder body, the cylinder of described piston body is provided with the recessed grain of annular and forms seal ring cavity volume, described piston packing ring is set in seal ring cavity volume, the external diameter of described piston packing ring and the internal chamber wall of cylinder body seal fits, the internal diameter of piston packing ring and the recessed poor groover rot diameter Spielpassung of annular, the groove width of the recessed grain of described annular is greater than the thickness of described piston packing ring, the two side of the recessed grain of described annular is respectively equipped with through damping hole, on the two side of the recessed grain of described annular, total latus rectum sum of damping hole is unequal, the annular sealing surface matched in the two side that two sides that on described piston packing ring, the two side of grain recessed with annular is relative are respectively equipped with grain recessed with annular, described annular sealing surface is in the periphery of damping hole.
2. hydraulic damper according to claim 1, it is characterized in that: the one end of inserting near piston rod in the inner chamber of described cylinder body is provided with Compress Spring and compensating piston ring, the both sides of described compensating piston ring are fixed with limiting stopper, described Compress Spring and compensating piston ring on the piston rod sheathed slidably, one end of described Compress Spring is flexibly against on compensating piston ring end face and makes compensating piston ring have the power sliding to piston one end, the inside and outside wall of described compensating piston ring respectively with the internal chamber wall fluid-tight engagement of piston rod and cylinder body, described compensating piston ring is towards one end of piston and active chamber UNICOM.
3. hydraulic damper according to claim 2, it is characterized in that: described cylinder body and inner chamber are cylindrical, one end of cylinder body is closed, the other end opening is also provided with end casing, and described end casing center is provided with the through hole inserted for piston rod, and described piston body axial cross section is in " work " font, damping hole is arranged on, in two integrated disc portions of front and back, described piston packing ring is that cross section is L-shaped, the annular sealing surface described in end face formation of both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102860.6A CN104930105A (en) | 2014-03-19 | 2014-03-19 | Hydraulic damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102860.6A CN104930105A (en) | 2014-03-19 | 2014-03-19 | Hydraulic damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104930105A true CN104930105A (en) | 2015-09-23 |
Family
ID=54117430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410102860.6A Pending CN104930105A (en) | 2014-03-19 | 2014-03-19 | Hydraulic damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104930105A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488293A (en) * | 2018-04-26 | 2018-09-04 | 常州市达文电动车辆配件厂 | A kind of damper damping mechanism and apply its hydraulic pressure-air pressure combination of dampings damper |
| CN109695655A (en) * | 2019-01-21 | 2019-04-30 | 博耕管道支架(上海)有限公司 | A kind of hydraulic damper |
| CN113931961A (en) * | 2021-09-09 | 2022-01-14 | 神龙汽车有限公司 | Novel hydraulic self-adaptive damping adjustment shock absorber |
-
2014
- 2014-03-19 CN CN201410102860.6A patent/CN104930105A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488293A (en) * | 2018-04-26 | 2018-09-04 | 常州市达文电动车辆配件厂 | A kind of damper damping mechanism and apply its hydraulic pressure-air pressure combination of dampings damper |
| CN109695655A (en) * | 2019-01-21 | 2019-04-30 | 博耕管道支架(上海)有限公司 | A kind of hydraulic damper |
| CN109695655B (en) * | 2019-01-21 | 2021-01-05 | 博耕管道支架(上海)有限公司 | Hydraulic damper |
| CN113931961A (en) * | 2021-09-09 | 2022-01-14 | 神龙汽车有限公司 | Novel hydraulic self-adaptive damping adjustment shock absorber |
| CN113931961B (en) * | 2021-09-09 | 2023-03-28 | 神龙汽车有限公司 | Novel hydraulic self-adaptive damping adjustment shock absorber |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150923 |