CN103307187A - Vibration damper sealing structure - Google Patents
Vibration damper sealing structure Download PDFInfo
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- CN103307187A CN103307187A CN2013102609132A CN201310260913A CN103307187A CN 103307187 A CN103307187 A CN 103307187A CN 2013102609132 A CN2013102609132 A CN 2013102609132A CN 201310260913 A CN201310260913 A CN 201310260913A CN 103307187 A CN103307187 A CN 103307187A
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Abstract
The invention discloses a vibration damper sealing structure which comprises an oil seal cover, a guide holder, oil seals and compensation oil seals, wherein oil return holes are formed in the guide holder, the oil seals are contacted with the axial end surface of the guide holder and mounted in the guide holder and the oil seal cover, and the oil seal cover and the guide holder are fastened and are in interference fit; the oil seals and a piston rod are tightly contacted and matched in a sealing manner; leaked oil between each oil seal and the piston rod flows back to an oil storage cylinder through the oil return holes in the guide holder; each compensation oil seal comprises a sealing elastomer and a bulging elastomer which is embedded into the sealing elastomer, a bulged part of the bulging elastomer is formed on the axial end surface of the sealing elastomer; the compensation oil seals are mounted between the oil seal cover and the oil seals and contacted and matched with the piston rod in a sealing manner; an oil accommodating cavity is formed between the compensation oil seals and the oil seals; during stroke extension, ultrahigh pressure oil in the oil accommodating cavity axially extrudes the bulging elastomers, and the bulging elastomers are radially deformed and expanded to squeeze the sealing elastomers to be expanded, so that the sealing elastomers are matched with the piston rod in a high oil pressure sealing manner.
Description
Technical field
The invention belongs to vibration damper and technical field of sealing technology, relate to a kind of shock absorber sealing structure, be specially adapted to the vehicle oil-pressure damper, be particularly useful for having the vehicle oil-pressure damper of superelevation oil pressure working state.
Background technique
The vehicle hydraulic vibration damper adopts hydraulic oil as damping medium.For the heavy goods vehicles that need to move under rugged environment, damper piston is when high-speed motion, and the vibration damper chamber pressure increases, and the vehicle hydraulic vibration damper often is in superelevation oil pressure working state; Conventional oil is enclosed under such hyperbaric environment can't guarantee sealing; If guarantee sealing with a plurality of oil sealings, its frictional force is very large, cause low speed damping force value error larger, and vibration damper is not high working life.Vehicle hydraulic vibration damper how to realize having superelevation oil pressure working state not only guaranteed cmpletely hydraulic seal but also do not cause seal element and movement parts frictional force excessive, be that related domain engineers and technicians explore the problem with research always.
The sealing configuration of a patent application 200710034463.X oil-pressure damper just as is known, encapsulation scheme when people seek the work of vehicle hydraulic vibration damper ultrahigh pressure is to seek how to reduce the front ultrahigh pressure of Sealing all the time, leakage during the work of vehicle hydraulic vibration damper ultrahigh pressure is an art technology difficult problem always, and unresolved.
Summary of the invention
The present invention discloses a kind of shock absorber sealing structure, can't guarantee sealing under the vehicle hydraulic vibration damper hyperbaric environment that has superelevation oil pressure working state in the prior art or for guaranteeing that sealing makes its frictional force very large to solve, cause low speed damping force value error larger, and the problem such as vibration damper working life is not high.
A kind of shock absorber sealing structure of the present invention comprises oil seal cover, guide holder, oil sealing, sliding bearing; Has spill port on the guide holder; Sliding bearing is fixedly mounted on the guide holder; Sliding bearing and piston rod are slidingly matched; Oil sealing contacts with the guide holder axial end, and oil sealing is installed in guide holder and the oil seal cover, the fastening interference fit of oil seal cover and guide holder; Oil sealing and piston rod close contact are sealed and matched; Seepage fluid spill port on guide holder between oil sealing and piston rod flows back to oil storage cylinder; It is characterized in that: comprise that also Compensation oil seal, Compensation oil seal comprise sealing elastomer, bulging elastomer; In the bulging elastomer embedding sealing elastomer, and have the bulging elastic protrusion part at the sealing elastomer axial end and divide; Compensation oil seal is installed between oil seal cover and the oil sealing, and Compensation oil seal contacts with piston rod and is sealed and matched; Between Compensation oil seal and oil sealing, has the appearance oil pocket; During extension stroke, hold oil pocket super high pressure oil last item to extruding bulging elastomer, the bulging elastomer is the deformation long sealing elastomer that rises that squeezes that rises radially, sealing elastomer be subjected to the bulging elastomer radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod.
The present invention optimizes structure: isolation briquetting 7 also is installed between Compensation oil seal and the oil sealing; The isolation briquetting is kept apart Compensation oil seal and oil sealing; Has spill port on the isolation briquetting; Have oil back chamber between isolation briquetting and guide holder, spill port oil channel connection on spill port, oil back chamber and the guide holder is arranged on the isolation briquetting.
The present invention optimizes structure: two of oil sealing quantity; The first isolation briquetting is installed between the first oil sealing and the second oil sealing; Has spill port on the first isolation briquetting; Has oil back chamber between the first isolation briquetting and guide holder, spill port oil channel connection on spill port, oil back chamber and the guide holder on the first isolation briquetting; The second isolation briquetting is installed between Compensation oil seal and the second oil sealing, has the appearance oil pocket between Compensation oil seal and the second isolation briquetting; During extension stroke, hold oil pocket super high pressure oil last item to extruding bulging elastomer, the bulging elastomer is the deformation long sealing elastomer that rises that squeezes that rises radially, sealing elastomer be subjected to the bulging elastomer radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod.
The present invention optimizes structure: two of Compensation oil seal quantity; The axial bulging elastic protrusion part of the second Compensation oil seal is divided with the first Compensation oil seal and is contacted; Has the appearance oil pocket between the first Compensation oil seal and the second isolation briquetting; During extension stroke, hold oil pocket super high pressure oil last item to extruding bulging elastomer, the bulging elastomer is the deformation long sealing elastomer that rises that squeezes that rises radially, sealing elastomer be subjected to the bulging elastomer radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod.
Working procedure is as follows: guide holder is connected with the fastening installation of clutch release slave cylinder; Oil seal cover is connected with the fastening installation of oil storage cylinder; When extension stroke piston during at low-speed motion, shock absorber working cylinder inner fluid pressure is less, and oil sealing is realized the sealing of low speed fluid; When the extension stroke velocity of piston increased suddenly, oil pressure increased, and the leak gap between oil sealing and piston rod increases, and instantaneous pressure seepage fluid part spill port on guide holder flows back to oil storage cylinder, and a part enters holds oil pocket axial compression Compensation oil seal; The bulging elastomer of Compensation oil seal is subjected to the radially deformation length that rises of axial oil hydraulic coupling, and the sealing elastomer of Compensation oil seal is subjected to the bulging elastomer radially to squeeze the sealing of rising.During compression stroke, hold between Compensation oil seal and the oil sealing that oil pressure is far longer than the oil back chamber oil pressure in the oil pocket, hold oil pocket hydraulic oil between Compensation oil seal and the oil sealing and be back to oil back chamber.
Good effect of the present invention is: work as extension stroke, during the damper piston low-speed motion, oil liquid pressure is in low-pressure state, and oil sealing is not in compensating coefficient, and stiction is less, can improve vibration damper working life; During the damper piston high-speed motion, oil liquid pressure is in high pressure conditions, and oil sealing can automatic compensating, improves sealing effect.Easy to assembly, be applicable to produce in enormous quantities.
Description of drawings
Fig. 1 is the first embodiment of the invention structural representation;
Fig. 2 is the second embodiment of the invention structural representation;
Among the figure: 1 sliding bearing, 2 guide holders, 3 oil seal covers, 4 Compensation oil seals, 5 Compensation oil seals, 6 oil sealings, 7 isolation briquettings, 8 oil sealings, 9, isolation briquetting, J1 piston rod, J2 clutch release slave cylinder, J3 oil storage cylinder; Wherein: 2a oil back chamber, 2b spill port, 3a hold oil pocket, 4a sealing elastomer, 4b bulging elastomer, 5a sealing elastomer, 5b bulging elastomer, 7a spill port.
Embodiment:
Describe the embodiment of the invention in detail below in conjunction with accompanying drawing.
As shown in Figure 1: this first embodiment comprises sliding bearing 1, guide holder 2, oil seal cover 3, Compensation oil seal 4, the first oil sealing 6, the first isolation briquetting 7, the second oil sealing 8, the second isolation briquetting 9; Compensation oil seal 4 comprises sealing elastomer 4a, bulging elastomer 4b; In the bulging elastomer 4b embedding sealing elastomer 4a, and has bulging elasticity 4b projection at sealing elastomer 4a axial end; The first isolation briquetting 7 is installed between the first oil sealing 6 and the second oil sealing 8; Has spill port 7a on the first isolation briquetting 7; The first isolation briquetting 7 and 2 of guide holders have oil back chamber 2a, have spill port 2b on the guide holder 2; Spill port 2b oil channel connection on spill port 7a, oil back chamber 2a and the guide holder on the first isolation briquetting 7; The second isolation briquetting 9 is installed between Compensation oil seal 4 and the second oil sealing 8, has the oil pocket of appearance 3a between Compensation oil seal 8 and the second isolation briquetting 9; Sliding bearing 1 is fixedly mounted on the guide holder 2; Sliding bearing 1 is slidingly matched with piston rod J1; The first oil sealing 6 contacts with guide holder 2 axial ends, and the first oil sealing 6, the first isolation briquetting 7, the second oil sealing 8, the second isolation briquetting 9 and Compensation oil seal 4 are installed in guide holder 2 and the oil seal cover 3 oil seal cover 3 and guide holder 2 fastening interference fit; Compensation oil seal 4 contacts with piston rod J1 and is sealed and matched; The first oil sealing 6, the second oil sealing 8 are sealed and matched with piston rod J1 close contact.
Working procedure: guide holder 2 is connected with the fastening installation of clutch release slave cylinder J2; Oil seal cover 3 is connected with the fastening installation of oil storage cylinder J3; When extension stroke piston during at low-speed motion, shock absorber working cylinder J2 inner fluid pressure is less, and the first oil sealing 6, the second oil sealing 8 are realized the sealing of low speed fluid; When the extension stroke velocity of piston increases suddenly, oil pressure increases, leak gap between the first oil sealing 6, the second oil sealing 8 and piston rod increases, and instantaneous pressure seepage fluid part spill port 2b on guide holder 2 flows back to oil storage cylinder J3, and a part enters holds oil pocket 3a axial compression Compensation oil seal; The bulging elastomer 4b of Compensation oil seal 4 is subjected to the radially deformation length that rises of axial oil hydraulic coupling, the sealing elastomer 4a of Compensation oil seal 4 be subjected to bulging elastomer 4b radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod J1; During compression stroke, hold between Compensation oil seal 4 and the second oil sealing 8 that oil pressure is far longer than oil back chamber 2a oil pressure among the oil pocket 3a, appearance oil pocket 3a hydraulic oil is back to oil back chamber 2a between Compensation oil seal 4 and the second oil sealing 8.
As shown in Figure 2: this second embodiment comprises sliding bearing 1, guide holder 2, oil seal cover 3, the first Compensation oil seal 4, the second Compensation oil seal 5, the first oil sealing 6, the first isolation briquetting 7, the second oil sealing 8, the second isolation briquetting 9; The second Compensation oil seal 5 axial bulging elastic protrusion part are divided with the first Compensation oil seal 4 and are contacted; Has the oil pocket of appearance 3a between the first Compensation oil seal 4 and the second isolation briquetting 9; When the extension stroke velocity of piston increases suddenly, hold oil pocket 3a super high pressure oil last item to the second Compensation oil seal 5 extruding bulging elastomer 5b, bulging elastomer 5b is the deformation long sealing elastomer 5a that rises that squeezes that rises radially, sealing elastomer 5a be subjected to bulging elastomer 5b radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod J1.The bulging elastomer 4b of the first Compensation oil seal 4 is subjected to 5 axial compressions of the second Compensation oil seal, the sealing elastomer 4a of Compensation oil seal 4 be subjected to bulging elastomer 4b radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod J1; During compression stroke, oil pressure is far longer than oil back chamber 2a oil pressure among the appearance oil pocket 3a, holds oil pocket 3a hydraulic oil and is back to oil back chamber 2a.
Claims (4)
1. shock absorber sealing structure; Comprise oil seal cover, guide holder, oil sealing, sliding bearing; Has spill port on the guide holder; Sliding bearing is fixedly mounted on the guide holder; Sliding bearing and piston rod are slidingly matched; Oil sealing contacts with the guide holder axial end, and oil sealing is installed in guide holder and the oil seal cover, the fastening interference fit of oil seal cover and guide holder; Oil sealing and piston rod close contact are sealed and matched; Seepage fluid spill port on guide holder between oil sealing and piston rod flows back to oil storage cylinder; It is characterized in that: comprise that also Compensation oil seal, Compensation oil seal comprise sealing elastomer, bulging elastomer; In the bulging elastomer embedding sealing elastomer, and have the bulging elastic protrusion part at the sealing elastomer axial end and divide; Compensation oil seal is installed between oil seal cover and the oil sealing, and Compensation oil seal contacts with piston rod and is sealed and matched; Between Compensation oil seal and oil sealing, has the appearance oil pocket; During extension stroke, hold oil pocket super high pressure oil last item to extruding bulging elastomer, the bulging elastomer is the deformation long sealing elastomer that rises that squeezes that rises radially, sealing elastomer be subjected to the bulging elastomer radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod.
2. a kind of shock absorber sealing structure according to claim 1 is characterized in that: the isolation briquetting also is installed between Compensation oil seal and the oil sealing; The isolation briquetting is kept apart Compensation oil seal and oil sealing; Has spill port on the isolation briquetting; Has oil back chamber between isolation briquetting and guide holder, spill port oil channel connection on spill port, oil back chamber and the guide holder on the isolation briquetting.
3. a kind of shock absorber sealing structure according to claim 1 and 2 is characterized in that: two of oil sealing quantity; The first isolation briquetting is installed between the first oil sealing and the second oil sealing; Has spill port on the first isolation briquetting; Has oil back chamber between the first isolation briquetting and guide holder, spill port oil channel connection on spill port, oil back chamber and the guide holder on the first isolation briquetting; The second isolation briquetting is installed between Compensation oil seal and the second oil sealing, has the appearance oil pocket between Compensation oil seal and the second isolation briquetting; During extension stroke, hold oil pocket super high pressure oil last item to extruding bulging elastomer, the bulging elastomer is the deformation long sealing elastomer that rises that squeezes that rises radially, sealing elastomer be subjected to the bulging elastomer radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod.
4. according to claim 1 and 2, it is characterized in that: two of Compensation oil seal quantity; The axial bulging elastic protrusion part of the second Compensation oil seal is divided with the first Compensation oil seal and is contacted; Has the appearance oil pocket between the first Compensation oil seal and the second isolation briquetting; During extension stroke, hold oil pocket super high pressure oil last item to extruding bulging elastomer, the bulging elastomer is the deformation long sealing elastomer that rises that squeezes that rises radially, sealing elastomer be subjected to the bulging elastomer radially deformation squeeze to rise and be sealed and matched with the high oil pressure of piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260913.2A CN103307187B (en) | 2013-06-27 | 2013-06-27 | Vibration damper sealing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260913.2A CN103307187B (en) | 2013-06-27 | 2013-06-27 | Vibration damper sealing structure |
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| CN103307187A true CN103307187A (en) | 2013-09-18 |
| CN103307187B CN103307187B (en) | 2015-05-13 |
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| CN201310260913.2A Active CN103307187B (en) | 2013-06-27 | 2013-06-27 | Vibration damper sealing structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265825A (en) * | 2014-06-24 | 2015-01-07 | 江苏明星减震器有限公司 | Rear shock absorber |
| CN107489724A (en) * | 2017-10-12 | 2017-12-19 | 华东交通大学 | A kind of shock absorber sealing device of the guide holder containing wedge insert |
| CN106523575B (en) * | 2016-12-22 | 2018-05-22 | 芜湖天佑汽车技术有限公司 | Adjustable shock |
| CN112128354A (en) * | 2020-09-17 | 2020-12-25 | 东风格特拉克汽车变速箱有限公司 | Oil seal structure of gearbox shaft hole |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3117493A1 (en) * | 1981-05-02 | 1982-11-25 | Boge Gmbh, 5208 Eitorf | Gas-pressure damper of the two-tube-telescope construction type |
| US4428566A (en) * | 1980-11-26 | 1984-01-31 | August Bilstein Gmbh & Co. Kg | Two-tube hydropneumatic shock absorber |
| CN2360677Y (en) * | 1999-01-26 | 2000-01-26 | 汪沛华 | Sealing device of Drum type viberator |
| EP1769176B1 (en) * | 2004-07-13 | 2007-12-19 | Trelleborg Sealing Solutions Germany GmbH | Seal arrangement |
| CN201326673Y (en) * | 2008-11-03 | 2009-10-14 | 株洲南车时代电气股份有限公司 | Oil damper for locomotive and rolling stock |
-
2013
- 2013-06-27 CN CN201310260913.2A patent/CN103307187B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428566A (en) * | 1980-11-26 | 1984-01-31 | August Bilstein Gmbh & Co. Kg | Two-tube hydropneumatic shock absorber |
| DE3117493A1 (en) * | 1981-05-02 | 1982-11-25 | Boge Gmbh, 5208 Eitorf | Gas-pressure damper of the two-tube-telescope construction type |
| CN2360677Y (en) * | 1999-01-26 | 2000-01-26 | 汪沛华 | Sealing device of Drum type viberator |
| EP1769176B1 (en) * | 2004-07-13 | 2007-12-19 | Trelleborg Sealing Solutions Germany GmbH | Seal arrangement |
| CN201326673Y (en) * | 2008-11-03 | 2009-10-14 | 株洲南车时代电气股份有限公司 | Oil damper for locomotive and rolling stock |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265825A (en) * | 2014-06-24 | 2015-01-07 | 江苏明星减震器有限公司 | Rear shock absorber |
| CN106523575B (en) * | 2016-12-22 | 2018-05-22 | 芜湖天佑汽车技术有限公司 | Adjustable shock |
| CN107489724A (en) * | 2017-10-12 | 2017-12-19 | 华东交通大学 | A kind of shock absorber sealing device of the guide holder containing wedge insert |
| CN112128354A (en) * | 2020-09-17 | 2020-12-25 | 东风格特拉克汽车变速箱有限公司 | Oil seal structure of gearbox shaft hole |
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| Publication number | Publication date |
|---|---|
| CN103307187B (en) | 2015-05-13 |
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