CN1904416A - Inner cavity medium pressure self compensated composite sealing ring - Google Patents
Inner cavity medium pressure self compensated composite sealing ring Download PDFInfo
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- CN1904416A CN1904416A CN 200510085171 CN200510085171A CN1904416A CN 1904416 A CN1904416 A CN 1904416A CN 200510085171 CN200510085171 CN 200510085171 CN 200510085171 A CN200510085171 A CN 200510085171A CN 1904416 A CN1904416 A CN 1904416A
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- seal ring
- inner cavity
- medium pressure
- pressure self
- ring
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Abstract
The invention is formed by using an inner cavity medium pressure self-compensating sealing washer as an elastic carrier and adding a sealing ring on its working surface. The combination sealing washer includes an axle combination sealing washer and a bore combination sealing washer. A number of bosses on the working surface of the above sealing washers in not limited. The sealing ring has two types: a circular sealing ring and a right-angle bowl-shaped sealing ring.
Description
Technical field
The present invention relates to piston and cylinder body technical field of sealing technology in liquid, the Pneumatic Transmission.
Background technique
Liquid, pneumatic cylinder are the executive components in liquid, the pneumatic actuator system, are liquid, air-driven key equipment.Sealing technique is the key technology in liquid, the Pneumatic Transmission technology.Sealing technique guarantees safe operation for (oil, gas, the water) that prevents electronic product equipment such as liquid, pneumatic cylinder " three leak " in liquid, the Pneumatic Transmission technology, improves service behaviour and efficient, energy saving, and the protection environment is significant.
As everyone knows, liquid, pneumatic cylinder generally adopt lip RunddichtringOs and O RunddichtringO and relevant combination form seal ring thereof such as Yx type, U type, V-type at present.Lip RunddichtringOs such as Yx type, V-type are that pressure medium extruding lip is realized sealing, the lip of Yx type, U type, V-type class lip RunddichtringO is flimsy, in case and lip wearing and tearing will lose seal action, so Yx type, U type, V-type class lip RunddichtringO life-span are short.The O RunddichtringO produces prestressing force by the extrusion-deformation of when assembling and reaches sealing effect.Its feature is: simple in structure, withstand voltage height, volume are little.But because wearing and tearing are big in the movement process, be in deformation state for a long time, easily produce permanent deformation forfeiture elasticity, operating life is short.Though mostly adopt combining form now, be basic resilient support promptly with O type circle, add a seal ring that usefulness is wear-resisting, corrosion-resistant material is made in O type circle outer ring, with the purpose that realizes increasing the service life.But, be that the combined seal ring that base growth is got up can not keep good sealing effect the long period equally with O type circle owing to keep away the deadly defect that produces permanent deformation in the unavoidable use as the O RunddichtringO of basic resilient support.So adopt liquid, the pneumatic cylinder weak point in working life of above-mentioned sealing technique.
The inner cavity medium pressure self compensated RunddichtringO of being invented recently pushes the sealing circle body from inner chamber, makes the seal ring working surface be close to cylinder face or piston rod surface, realizes sealing; Pressure medium is big more, and the swollen tension of seal ring lateral extrusion is big more, and sealing effect is good more.As long as pressure medium is in the tolerance range of the used material of seal ring, inner cavity medium pressure self compensated RunddichtringO always can obtain best sealing effect.Because pressure medium is realized sealing from inner chamber crush seal circle body, there is not the filter of the wearing and tearing of dehiscing, there is not the defective of lip RunddichtringOs such as Yx type, U type, V-type.Inner cavity medium pressure self compensated RunddichtringO is to be in complete relaxation state under zero-pressure and minute-pressure state basically, even when high pressure conditions, whole rubber seal is evenly stressed under the extruding of pressure medium, and deformation also is very little, can not produce permanent set; Inner cavity medium pressure self compensated RunddichtringO can keep good elasticity in considerable time.Because seal ring working surface and seal ring cavity all have been full of medium, and with cylinder face or piston rod surface generation relative movement the time, the heat of generation can come by the medium transmission soon, its resistance to high temperature is also good than O type circle class seal ring simultaneously.So the working life of inner cavity medium pressure self compensated RunddichtringO is more much longer than O type circle class seal ring.Various technology capability such as, impact resistance easy, wear-resistant as for installation and maintenance, working stability, Yx type, U type, V-type, O type circle class seal ring all can only be unmatch.
Development along with the modernization of industry, automation, the service condition of electronic product is harsh day by day, make that the applying working condition of rubber seal is more and more harsher,, heatproof withstand voltage to Sealing, shock-resistant, corrosion-resistant, work operates steadily etc., and technology capability constantly proposes upgrades, higher requirement.Under the operating mode of ask for something strictness, use inner cavity medium pressure self compensated RunddichtringO can not satisfy existing better elastic simultaneously separately, good corrosion resistance is arranged again, has good wear-resisting property again,, can lead various working conditions such as variation by Shi Ying Gao Frequency again.Therefore will consider to adopt combining form, be applied to the harsh environment of working condition.
Summary of the invention
Purpose of the present invention will provide a kind of easy for installation, long service life exactly, both withstand voltage, shock-resistant, heatproof, the inner cavity medium pressure self compensated composite sealing ring corrosion-resistant again, that work operates steadily, technology capability is preeminent.Can replace the sealing of polymorphic type liquid such as Yx type, U type, V-type, O type circle, pneumatic cylinder, be applicable to and produce novel liquid, pneumatic cylinder and adopting the transformation of other all kinds seal ring liquid, pneumatic cylinder.
Technological scheme of the present invention is achieved in that by an inner cavity medium pressure self compensated seal ring as resilient support, on its working surface, increase a seal ring that requires the selection of material to make according to working condition, constitute inner cavity medium pressure self compensated composite sealing ring.This combined seal ring split axle is with combined seal ring and hole combined seal ring.
Be characterized in: 1) axle is outside with inner cavity medium pressure self compensated seal ring 1 working surface with the axle of combined seal ring, and axle is enclosed within the outside of inner cavity medium pressure self compensated seal ring 1 working surface with seal ring 21,23; 2) hole is inside with inner cavity medium pressure self compensated seal ring 2 working surfaces with the hole of combined seal ring; The hole is enclosed within the inner ring of inner cavity medium pressure self compensated seal ring working surface with seal ring 22; 3) the boss number on the working surface of inner cavity medium pressure self compensated seal ring is not limit, and number was greater than 2 o'clock, and boss 4 must not be higher than two ends semicircle boss 3 in the middle of it; 4) axle is the outer ring with the working surface of inner cavity medium pressure self compensated seal ring 1, axle is not less than the internal diameter of axle with seal ring 21,23 with the external diameter of inner cavity medium pressure self compensated seal ring 1, the hole is inner rings with the hole of combined seal ring with the working surface of inner cavity medium pressure self compensated seal ring 2, and the hole is not more than the external diameter of hole with seal ring 22 with the internal diameter of inner cavity medium pressure self compensated seal ring 2; 5) pattern of seal ring has annular sealing ring 21,22; With 23 two kinds of right angle bowl-type seal rings.
Since combined seal ring of the present invention be with inner cavity medium pressure self compensated seal ring be that basic elasticity is carried except that the good sealing effect with inner cavity medium pressure self compensated seal ring, leakage is little, the life-span long, the excellent characteristics such as easy for installation, high pressure resistant, high temperature resistant, shock-resistant, good operating stability, the characteristics that also have the sealing ring, body, require the selection of material to make seal ring according to working condition again, mutual group becomes combination seal.The utility model is promptly corrosion-resistant, selflubricating, characteristics such as wear-resisting.Originally use liquid, the pneumatic cylinder of other types seal ring, as long as through after piston is simply processed, can reforming cost model utility seal arrangement.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 adopts ring packing annulate shaft inner cavity medium pressure self compensated composite sealing ring cut-away view
Fig. 2 adopts right angle bowl-type sealing annulate shaft inner cavity medium pressure self compensated composite sealing ring cut-away view
Fig. 3 is a hole combined seal ring cut-away view
Fig. 4 adopts the piston sealing device of two axles usefulness inner cavity medium pressure self compensated composite sealing rings and liquid, the pneumatic cylinder cut-away view of a hole usefulness inner cavity medium pressure self compensated composite sealing ring end bracket enclosed device
Fig. 5 adopts the piston sealing device of an axle usefulness inner cavity medium pressure self compensated composite sealing ring and liquid, the pneumatic cylinder cut-away view of a hole usefulness inner cavity medium pressure self compensated composite sealing ring end bracket enclosed device
Embodiment
Axle among Fig. 1, Fig. 2 is the outer ring with inner cavity medium pressure self compensated seal ring 1 its working surface, axle has one outward with seal ring 21,23 with inner cavity medium pressure self compensated seal ring 1 working surface, and axle equals with the external diameter L of inner cavity medium pressure self compensated seal ring 1 or is slightly larger than an internal diameter of usefulness seal ring 21,23.
Hole among Fig. 3 is an inner ring with inner cavity medium pressure self compensated seal ring 2 its working surfaces, the hole of satisfying seal ring 22 is arranged in inner cavity medium pressure self compensated seal ring 2 working surfaces, and the inside diameter D of inner cavity medium pressure self compensated seal ring 2 is equal to or slightly less than the external diameter of hole with seal ring 22.
As can be seen from Figure 4, in the piston sealing device of liquid, pneumatic cylinder: the close two end faces at piston block 8 has groove, and two axles just are installed in the groove respectively with inner cavity medium pressure self compensated composite sealing ring 1; The both ends of the surface of piston block 8 have some axial aperture 10, have the radial hole 9 of respective numbers in the groove, and both are interconnected, and all have been full of medium in seal ring working surface and the seal ring cavity.When zero-pressure and minute-pressure, because the effect of pretightening force when being subjected to installing, axle is close to axle seal ring 23 inwalls with inner cavity medium pressure self compensated seal ring 1 working surface, and axle is with then guaranteeing to form good sealing effect by the processing quality of fit between seal ring 23 working surfaces and cylinder body 7 inwalls; When pressure strengthens, pressure reaches medium work inner chamber 11 by medium via end face axial aperture 10 and radial hole 9, axle passes to an axle usefulness seal ring 23 with 1 of inner cavity medium pressure self compensated seal ring with pressure medium, axle is closely contacted with cylinder body 7 inwalls with seal ring 23, obtain fabulous sealing effect.In the end bracket enclosed device of liquid, pneumatic cylinder: have axial aperture 20 on the corresponding position of cylinder inner side end of end cap 5, groove inside is drilled with the radial hole 19 of certain depth, both interconnect, and the hole just is installed in the groove with inner cavity medium pressure self compensated composite sealing ring 2; When zero-pressure and minute-pressure, because the effect of pretightening force when being subjected to installing, the hole is close to seal ring 22 outer rings with inner cavity medium pressure self compensated composite sealing ring 2 inner rings in the hole, then guarantees to form good sealing effect by the processing quality of fit between seal ring 22 working surfaces and the piston thick stick 6; When pressure strengthens, pressure reaches medium work inner chamber 11 by medium via end face axial aperture 20 and radial hole 19, the hole passes to the hole with seal ring 22 with 2 of inner cavity medium pressure self compensated seal rings with pressure medium, the hole is closely contacted with piston rod 6 with seal ring 22, obtain fabulous sealing effect.
As can be seen from Figure 5, an axle is installed in piston block 12 and 13 grooves that constitute with inner cavity medium pressure self compensated composite sealing ring, has the radial hole 16 of some axial aperture 14,15 and respective numbers on the piston block 12 and 13; Be processed into commutation chamber 17 in every group of axial aperture 14,15 and radial hole 16 concourses; Commutation seal element 18 promptly is placed wherein.When zero-pressure and minute-pressure, because the effect of pretightening force when being subjected to installing, seal ring 1 working surface is close to seal ring 21 inwalls, then guarantees to form good sealing effect by the processing quality of fit between seal ring 21 working surfaces and cylinder body 7 inwalls; When pressure strengthens, as when piston rod 6 under the fluid medium pressure effect during to left movement, with axial aperture 14 shutoff, and the big more shutoff of pressure medium is tight more under the effect of pressure medium for commutation seal element 18.Flowing medium is via axial aperture 15, flow into the medium work inner chamber 11 of seal ring 1 by radial hole 16, radial expansion takes place in seal ring 1 under the pressure medium effect, 1 of seal ring passes to seal ring 21 with pressure medium, seal ring 21 is closely contacted with cylinder body 7 inwalls, obtain fabulous sealing effect.When the piston motion direction changes into from a left side when moving right, the pressure medium direction has changed, and commutation seal element 18 is under pressure action of medium, and axial aperture 14 places by former working position are transformed into axle immediately
On the position of aperture 15, and with its shutoff, flowing medium promptly flows into and is communicated with via the medium work inner chamber 11 of radial hole 16 and seal ring 1 from axial aperture 14, the pressure medium that has changed direction is delivered to the medium work inner chamber 11 of seal ring 1, as seen from the figure, pressure medium in the medium work this moment inner chamber 11 does not almost change, the sealing effect of seal ring 1 maintains a good state always, piston rod 6 then changes moving direction one automatically with the change of pressure medium direction immediately and moves right, and whole commutation process is steadily rapid.
Same Fig. 4 of end bracket enclosed device of liquid, pneumatic cylinder among Fig. 5.
Claims (2)
1, a kind of inner cavity medium pressure self compensated composite sealing ring, it is characterized in that: by an inner cavity medium pressure self compensated seal ring as resilient support, on its working surface, increase a seal ring that requires the selection of material to make according to working condition, constitute combined type packing ring; The working surface back side of inner cavity medium pressure self compensated seal ring and seal ring two walls form cavity, and the boss number on the working surface of seal ring is from zero meter, and number is not limit, and number was greater than 2 o'clock, and boss 4 must not be higher than two ends semicircle boss 3 in the middle of it; The pattern of seal ring has annular sealing ring 21,22; With 23 two kinds of right angle bowl-type seal rings.
2, inner cavity medium pressure self compensated composite sealing ring split axle according to claim 1 combined seal ring and hole combined seal ring, it is characterized in that: axle is the outer ring with the axle of inner cavity medium pressure self compensated composite sealing ring with inner cavity medium pressure self compensated seal ring 1 working surface, and axle is enclosed within the outside of axle with inner cavity medium pressure self compensated seal ring 1 working surface with seal ring 21,23; Axle is not less than the internal diameter of seal ring 21,23 with the external diameter L of inner cavity medium pressure self compensated seal ring 1; The hole is inner ring with the hole of combined seal ring with inner cavity medium pressure self compensated seal ring 2 working surfaces; The hole is enclosed within the inner ring of hole with inner cavity medium pressure self compensated seal ring 2 working surfaces with seal ring 22, and the hole is not more than the external diameter of hole with seal ring 22 with the inside diameter D of inner cavity medium pressure self compensated seal ring 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510085171 CN1904416A (en) | 2005-07-25 | 2005-07-25 | Inner cavity medium pressure self compensated composite sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510085171 CN1904416A (en) | 2005-07-25 | 2005-07-25 | Inner cavity medium pressure self compensated composite sealing ring |
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| CN1904416A true CN1904416A (en) | 2007-01-31 |
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| CN 200510085171 Pending CN1904416A (en) | 2005-07-25 | 2005-07-25 | Inner cavity medium pressure self compensated composite sealing ring |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092300A1 (en) * | 2008-01-08 | 2009-07-30 | Beijing New Seal Institute Of Hydraulic Technology | Multi-seal n-type sealing arrangement |
| CN101566180A (en) * | 2008-04-23 | 2009-10-28 | 北京纽希液压技术研究所 | Multilevel hydraulic cylinder |
| CN103016744A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Ultralow-temperature high-pressure dynamic sealing structure |
| WO2013166854A1 (en) * | 2012-05-07 | 2013-11-14 | 北京纽希液压技术研究所 | Hydraulic cylinder |
| CN105422844A (en) * | 2015-12-15 | 2016-03-23 | 苏州国泰科技发展有限公司 | Piston sealing ring |
| US9326403B2 (en) | 2014-02-26 | 2016-04-26 | Ambit Microsystems (Shanghai) Ltd. | Waterproof cap for ports in electronic devices |
| CN106567873A (en) * | 2016-11-14 | 2017-04-19 | 江门市格雷亚特流体密封技术有限公司 | PGW type piston sealing ring |
| CN108799498A (en) * | 2017-04-28 | 2018-11-13 | 凯氟隆（厦门）密封件有限公司 | A kind of Novel down-hole tool combinations encapsulation scheme |
| CN110131348A (en) * | 2019-05-05 | 2019-08-16 | 神华铁路货车运输有限责任公司 | Daub buffer, buffer unit and motor vehicles |
| CN113494607A (en) * | 2021-07-08 | 2021-10-12 | 西华大学 | double-O-shaped ring C-shaped slip ring type combined sealing structure |
-
2005
- 2005-07-25 CN CN 200510085171 patent/CN1904416A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092300A1 (en) * | 2008-01-08 | 2009-07-30 | Beijing New Seal Institute Of Hydraulic Technology | Multi-seal n-type sealing arrangement |
| CN101566180A (en) * | 2008-04-23 | 2009-10-28 | 北京纽希液压技术研究所 | Multilevel hydraulic cylinder |
| WO2013166854A1 (en) * | 2012-05-07 | 2013-11-14 | 北京纽希液压技术研究所 | Hydraulic cylinder |
| CN103016744A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Ultralow-temperature high-pressure dynamic sealing structure |
| CN103016744B (en) * | 2012-12-08 | 2016-01-20 | 中国航天科技集团公司第六研究院第十一研究所 | Ultralow temperature high pressure dynamic sealing structure |
| US9326403B2 (en) | 2014-02-26 | 2016-04-26 | Ambit Microsystems (Shanghai) Ltd. | Waterproof cap for ports in electronic devices |
| CN105422844A (en) * | 2015-12-15 | 2016-03-23 | 苏州国泰科技发展有限公司 | Piston sealing ring |
| CN106567873A (en) * | 2016-11-14 | 2017-04-19 | 江门市格雷亚特流体密封技术有限公司 | PGW type piston sealing ring |
| CN108799498A (en) * | 2017-04-28 | 2018-11-13 | 凯氟隆（厦门）密封件有限公司 | A kind of Novel down-hole tool combinations encapsulation scheme |
| CN110131348A (en) * | 2019-05-05 | 2019-08-16 | 神华铁路货车运输有限责任公司 | Daub buffer, buffer unit and motor vehicles |
| CN113494607A (en) * | 2021-07-08 | 2021-10-12 | 西华大学 | double-O-shaped ring C-shaped slip ring type combined sealing structure |
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Open date: 20070131 |