CN2495849Y - Sealing structure for oildraulic shock-absorber - Google Patents
Sealing structure for oildraulic shock-absorber Download PDFInfo
- Publication number
- CN2495849Y CN2495849Y CN 01253727 CN01253727U CN2495849Y CN 2495849 Y CN2495849 Y CN 2495849Y CN 01253727 CN01253727 CN 01253727 CN 01253727 U CN01253727 U CN 01253727U CN 2495849 Y CN2495849 Y CN 2495849Y
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- China
- Prior art keywords
- sealing
- oil
- piston rod
- dust
- cylinder end
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- Expired - Fee Related
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Abstract
The utility model relates to a sealing structure for an oil pressure shock absorber. The utility model comprises a piston component and a cylinder component; the cylinder component is provided with an oil sealing device and a dust proof device; the oil sealing device adopts a ripple sealing ring; the upper end of the sealing ring is matched with the piston pole and the lower end is fixed on the cylinder, and the middle part is ripple shape. The dust proof device of the sealing proof comprises a sealing ring in the inner layer, a dust proof cover in the outer layer and an outer dust proof cover. As the utility model adopts the ripple sealing structure, the high frequency and low swing vibration will be mostly or completely absorbed, therefore the friction between the sealing ring and the piston pole and the fatigue of the sealing ring can be reduced; the service life of the sealing ring is lengthened. The close dust proof device reduces the abrasion of the sealing ring and the pollution to the hydraulic oil and the service life of the oil. After testing, each function index of the oil pressure shock absorber with the improved sealing structure can meet the demands of the speeding up car.
Description
Technical field: the utility model relates to as the accessory of rail transport such as train, subway, light rail with vehicle, refers in particular to the damping device that is used for the high-speed overload vehicle, specifically refers to the improvement to the sealing configuration in the hydraulic damping device.
Background technique: during train operation, because a variety of causes can cause the vibration of vehicle.Be to guarantee train operation steadily and safety, generally adopt the decay vibration of train of hydraulic damping device.Common hydraulic damping device is mainly by cylinder component I, and piston rod assembly II and cylinder end assembly III form, and wherein are provided with oil-sealing arrangement and dust guard in the cylinder end assembly, and traditional oil-sealing arrangement all adopts " O " RunddichtringO A, referring to Fig. 1.Because during Vehicular vibration, produce the very high relative movement of frequency between piston rod and " O " type circle, between piston rod and seal ring, produce wearing and tearing, simultaneously because piston rod to the pull repeatedly of piston rod, makes the seal ring generation tired easily, so after operation after a while, seal action can significantly reduce, and produces leakage of oil, thereby damping force is descended, cushioning effect reduces even loses, and has had a strong impact on the life-span of vibration damper.Along with the raising of locomotive running speed, the frequency of locomotive vibration significantly increases, thereby makes this contradiction more outstanding.Therefore the vibration damper of said structure can't use on the speed-raising vehicle.
Summary of the invention:
The utility model is to improve the prior oil pressure vibration damper, mat reduces the wearing and tearing between piston rod and the seal ring to the improvement of ring structure, solves the most fatal leakage of oil problem of vibration damper, prolong the working life of vibration damper, to satisfy the requirement of train speed raising.
Because the wearing and tearing of seal ring are the main causes of vibration damper leakage of oil, and ring wear mainly is by existing between seal ring and the piston rod due to the relative movement.For this reason, the utility model changes original " O " RunddichtringO into the ripple seal ring, and an end of sealing circle cooperates with piston rod, and the other end is pressed on the cylinder end, is corrugated tube shape in the middle of the two ends.When Vehicular vibration makes piston rod produce the high frequency small amplitude motion, seal ring produces flexible at the bellows place, and relative displacement does not take place between seal ring and the piston rod, thereby do not produce friction, do not produce fatigue yet, so just prolonged the life-span of seal ring greatly, guaranteed that the vibration damper long-time running is oil-proof.
The sealing configuration of a kind of oleo-gear of the present utility model, comprise a piston assembly, a cylinder end assembly, be provided with the oil-sealing arrangement that prevents the pressure seepage in the described cylinder end assembly and prevent the dust guard that dust enters, described oil-sealing arrangement adopts a ripple seal ring, sealing circle upper end inner ring cooperates with piston rod, the lower end is fixed on the cylinder end, and the centre is corrugated tube shape.
Because dust can aggravate the wearing and tearing of piston rod and seal ring,, comprise the sealing cover of internal layer, outer field dirt-proof boot, outermost dust-proof cover so outside seal ring, be provided with the device that prevents the dust invasion.
The utility model is owing to adopted the ripple seal ring, when piston rod generation high frequency low amplitude vibrations, bellows is along with the motion of piston rod stretches or compression, do not produce relative movement between seal ring and the piston rod, vibration is absorbed by whole or big portion, therefore the fatigue of friction and seal ring significantly reduces between seal ring and the piston rod, thereby has prolonged the life-span of seal ring greatly; Simultaneously, wearing and tearing that tight dust guard has also reduced seal ring and pollution to hydraulic oil have prolonged oily working life.By to ring structure and in conjunction with the improvement of its material, can guarantee that the vibration damper long-time running is oil-proof.After tested, adopt the oleo-gear of improved sealing configuration, each top performance index all can satisfy the requirement of speed-raising vehicle operating.
Description of drawings:
Fig. 1 is the sealed structural representation of oleo-gear of the prior art;
Fig. 2 is an an embodiment's of the present utility model structural representation.
Embodiment:
Now in conjunction with an embodiment and accompanying drawing thereof, the sealing configuration of oleo-gear of the present utility model is described further.
Fig. 2 is the structural representation that an example adopts the oleo-gear of sealing configuration of the present utility model.This vibration damper mainly is made up of cylinder component, piston rod assembly and cylinder end assembly, described cylinder component mainly comprises pressure cylinder 4, oil storage cylinder 1 and bottom valve 2, piston rod assembly mainly comprises piston 10 and piston rod 11, piston 10 is provided with the one-way valve (referring to Fig. 1) of oil-feed and oil extraction, and the cylinder end assembly mainly comprises cylinder end 9 and sealed member.During Vehicular vibration, piston rod 11 is along with vibration is reciprocating, because the one-way valve on the piston 10 reduces the vehicle body amplitude to the damping function of hydraulic oil.Required hydraulic oil when oil storage cylinder 1 and bottom valve 2 are used to compensate with pressure store cylinder 4 volume-variation.Wherein seal ring 7 is whether keys of leakage of oil of decision vibration damper.
Described cylinder end assembly comprises oil-sealing arrangement and the dust guard that prevents the pressure oil seepage, and oil-sealing arrangement adopts a ripple seal ring 17, and sealing circle upper end inner ring 17a cooperates with piston rod 11, and lower end 17c is fixed on the cylinder end 9, and middle 17b is corrugated tube shape.Described ripple seal ring upper end is provided with a sealing snare 24 with the outer ring of piston rod cooperation place.
Because dust can aggravate the wearing and tearing of piston rod 11 and seal ring 17,, comprise sealing cover 16, dirt-proof boot 15 and dust-proof cover 6 so outside seal ring 17, be provided with the device that prevents the dust invasion.The sealing cover 16 that is coated on seal ring 17 outsides is located at internal layer, is spirally connected with cylinder end 9, ripple seal ring lower end 17c is pressed on the cylinder end 9 by a retainer ring 13 by sealing lid 16; Be provided with a corrugated dirt-proof boot 15 outside the sealing cover 16, this dirt-proof boot one end 15a cooperates with piston rod 11, and its other end 15c is fixed on the cylinder end 9, and middle 15b is corrugated tube shape; Be provided with cylindric dust-proof cover 6 outside the dirt-proof boot 15, this dust-proof cover 6 is installed on the piston rod 11, moves with piston rod 11, and whole cylinder end assembly is covered.
Claims (6)
1. the sealing configuration of an oleo-gear, mainly comprise a piston assembly, a cylinder end assembly, be provided with oil-sealing arrangement and dust guard in the described cylinder end assembly, it is characterized in that described oil-sealing arrangement adopts a ripple seal ring, sealing circle upper end inner ring cooperates with piston rod, and its lower end is fixed on the cylinder end, the centre is corrugated tube shape.
2. the sealing configuration of oleo-gear according to claim 1 is characterized in that the described ripple seal ring upper end and the outer ring of piston rod cooperation place are provided with a sealing snare.
3. the sealing configuration of oleo-gear according to claim 1, it is characterized in that described dust guard comprises a sealing cover, a dirt-proof boot and a dust-proof cover, described sealing cover is coated on the outside of ripple seal ring, be spirally connected with cylinder end, and described ripple seal ring be pressed on the cylinder end by a retainer ring.
4. according to the sealing configuration of claim 1 or 3 described oleo-gears, it is characterized in that described sealing cover is provided with a corrugated dirt-proof boot outward, this dirt-proof boot one end cooperates with piston rod, and the other end is fixed on the cylinder end, and the centre is corrugated tube shape.
5. according to the sealing configuration of claim 1 or 3 described oleo-gears, it is characterized in that described dirt-proof boot is provided with cylindric dust-proof cover outward, this dust-proof cover is installed on the piston rod, and whole cylinder end assembly is covered.
6. the sealing configuration of oleo-gear according to claim 4 is characterized in that described dirt-proof boot is provided with cylindric dust-proof cover outward, and this dust-proof cover is installed on the piston rod, and whole cylinder end assembly is covered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01253727 CN2495849Y (en) | 2001-09-17 | 2001-09-17 | Sealing structure for oildraulic shock-absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01253727 CN2495849Y (en) | 2001-09-17 | 2001-09-17 | Sealing structure for oildraulic shock-absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2495849Y true CN2495849Y (en) | 2002-06-19 |
Family
ID=33663173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01253727 Expired - Fee Related CN2495849Y (en) | 2001-09-17 | 2001-09-17 | Sealing structure for oildraulic shock-absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2495849Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518476A (en) * | 2011-12-13 | 2012-06-27 | 浙江万龙机械有限公司 | Zero leakage sealing device for oil cylinder piston rod of steam turbine |
| CN102767588A (en) * | 2012-07-30 | 2012-11-07 | 郑亚青 | Oil damper for rolling stock |
| CN103883586A (en) * | 2014-01-07 | 2014-06-25 | 江苏大洋精锻有限公司 | Dustproof device for oil cylinder |
| CN104279260A (en) * | 2013-07-11 | 2015-01-14 | 北汽福田汽车股份有限公司 | Damper and vehicle provided with damper |
| CN107407363A (en) * | 2015-04-02 | 2017-11-28 | Kyb摩托车减震器株式会社 | Front fork |
| CN111734769A (en) * | 2020-05-18 | 2020-10-02 | 中国原子能科学研究院 | High-temperature-resistant zero-leakage viscous damping shock absorber |
-
2001
- 2001-09-17 CN CN 01253727 patent/CN2495849Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518476A (en) * | 2011-12-13 | 2012-06-27 | 浙江万龙机械有限公司 | Zero leakage sealing device for oil cylinder piston rod of steam turbine |
| CN102767588A (en) * | 2012-07-30 | 2012-11-07 | 郑亚青 | Oil damper for rolling stock |
| CN104279260A (en) * | 2013-07-11 | 2015-01-14 | 北汽福田汽车股份有限公司 | Damper and vehicle provided with damper |
| CN104279260B (en) * | 2013-07-11 | 2016-08-10 | 北汽福田汽车股份有限公司 | Vibroshock and be provided with the vehicle of this vibroshock |
| CN103883586A (en) * | 2014-01-07 | 2014-06-25 | 江苏大洋精锻有限公司 | Dustproof device for oil cylinder |
| CN107407363A (en) * | 2015-04-02 | 2017-11-28 | Kyb摩托车减震器株式会社 | Front fork |
| CN107407363B (en) * | 2015-04-02 | 2019-03-29 | Kyb摩托车减震器株式会社 | Front fork |
| CN111734769A (en) * | 2020-05-18 | 2020-10-02 | 中国原子能科学研究院 | High-temperature-resistant zero-leakage viscous damping shock absorber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: YANG YUANHAO Free format text: FORMER NAME OR ADDRESS: TIANTONG RAILWAY VEHICLE FITTINGS CO., LTD., SHANGHAI |
|
| CP03 | Change of name, title or address |
Address after: 200063 Shanghai city Putuo District Yichuan Village No. 149 room 18 Patentee after: Yang Yuanhao Address before: 200071 Shanghai City Qiujiang Road No. 735 Patentee before: Tiantong Railway Vehicle Fittings Co., Ltd., Shanghai |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |