CN103925366A - Sealing arrangement and use method thereof - Google Patents
Sealing arrangement and use method thereof Download PDFInfo
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- CN103925366A CN103925366A CN201410018141.6A CN201410018141A CN103925366A CN 103925366 A CN103925366 A CN 103925366A CN 201410018141 A CN201410018141 A CN 201410018141A CN 103925366 A CN103925366 A CN 103925366A
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- seal
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Abstract
The present invention provides a sealing arrangement and a use method thereof. In the sealing arrangement having double seal for sealing two sealing object spaces which are to be sealed off from one another and are each filled with a medium to be sealed, mixture of the two mediums is avoided, and sealing rings arranged on axial end face sides of the double seal are excellently lubricated. In the double seal (1) of the sealing arrangement, one sealing lip, closest to a second sealing ring (7), of the sealing lip (8) of a first sealing ring are arranged such that there is an axial distance therebetween; the two sealing lips (8, 9) cling to a surface to be sealed (11) of a first machine element (13) in a sealing manner such that an axial distance (10) between the lips is axially closest to each other. The machine element is movable backward and forward in a translatory manner with a stroke (12) such that the axial distance is greater than the stroke of the first machine element (13).
Description
Technical field
The present invention relates to a kind ofly for hollow cylinder shape, have filling respectively seal arrangement and the using method thereof of the double seal that two sealed object spaces of sealed object fluid seal.This double seal comprises the 1st seal ring that is disposed at an end face in axial upper two end face sides, and is disposed at the 2nd seal ring of other end.Each seal ring at least has a sealing lip that bears dynamic load.In the sealing lip that the 1st seal ring has, approach of the 2nd seal ring most, in the sealing lip having with the 2nd seal ring, approach of the 1st seal ring most, be spaced from each other axial interval and configure.Sealing lip is close to the sealed object surface of the 1st mechanical component, and the 1st mechanical component can move back and forth vertically with the stroke amplitude of regulation.
Background technique
By patent documentation 1, be known to above-mentioned seal arrangement.This known seal arrangement is applicable to fuel reciprocating pump.Double seal axial poles is short, and the stroke amplitude of sealed object piston rod is greater than the axially spaced-apart between the sealing lip of the 1st seal ring and the sealing lip of the 2nd seal ring.
Prior art document
Patent documentation
Patent documentation 1: European patent application discloses No. 2067996
Summary of the invention
When piston rod being carried out to dynamic seal (packing) by sealing lip, always there is a small amount of sealed object fluid from corresponding sealing lip seepage.This small amount of sealed object fluid, for the excessive wear that prevents sealing lip, guarantees as far as possible consistently good usability between the long-term spreadable life, and lubricating between sealing lip and piston rod, is necessary.
Due to the larger stroke amplitude of axially spaced-apart extremely short between two sealing lips and piston rod, cause, when usually using seal arrangement, the undesirable situation that two sealed object fluids are sneaked into respectively the opposing party's side sealing object space occurring.The reason of the undesirable situation that sealing object fluid is sneaked into is, because stroke amplitude is compared large with above-mentioned axially spaced-apart, cause the sealed object surface of piston rod to guide the two sealed object fluids for lubrication and seal lip to pass through respectively the sealing lip of the opposing party's side, leak out in the sealed object space of the opposing party's side.
Said circumstances, is especially the seal arrangement in petrolift for seal arrangement, and two kinds of sealed object fluids are the situation of engine oil and fuel, is very inconvenient.
For example, if fuel is directed in engine oil, can cause engine oil dilution.Consequently, oil film removal in engine bearing, and then can there is high friction and engine shutdown.
On the contrary, if engine oil is directed in fuel, consequently may there is the breakage of ejecting system.On nozzle, may produce so-called carbonization, reduce therefrom the efficiency of ejecting system.Also may cause 1 above nozzle to quit work.
Because above-mentioned technical problem, the object of the invention is to improve the seal arrangement of prior art, avoid effectively the mixing of two sealed object fluids, and lubrication and seal ring better.
This technical problem is solved by the present invention who possesses feature that claim 1 is recorded.The dependent claims of claim 1 relates to other optimal technical scheme.
For solving the problems of the technologies described above, seal arrangement of the present invention, it is hollow cylinder shape, has the double seal that two sealed object spaces of sealed object fluid are filled respectively in sealing, it is characterized in that:
Described double seal has the 1st seal ring that is disposed at a side in axial both ends of the surface side, and is disposed at the opposing party's the 2nd seal ring,
The the described the 1st and the 2nd seal ring has respectively the sealing lip that at least one bears dynamic load,
In the sealing lip that described the 1st seal ring has, approach a sealing lip of described the 2nd seal ring most, in the sealing lip having with described the 2nd seal ring, approach a sealing lip of described the 1st seal ring most, be spaced from each other axial interval and configure,
The sealing lip that the described the 1st and the 2nd seal ring has is close to the sealed object surface of the 1st mechanical component, and the 1st mechanical component can axially move back and forth along described with the stroke amplitude of regulation,
Described axial interval is greater than the stroke amplitude of the described regulation of described the 1st mechanical component.
According to above-mentioned formation, can prevent following problem,, play two sealed object fluids of corresponding sealing lip lubrication, due to the axially reciprocating of the 1st mechanical component, and through the sealing lip of the opposing party's seal ring, spill respectively, invade the opposing party's seal space.That is to say, before the sealed object fluid that the movement direction of the 1st mechanical component exists on the sealed object surface of the 1st mechanical component as sealed object arrives the opposing party's sealing lip, just change is in the other direction.Thus, can prevent effectively that each sealed object fluid from mixing in two sealed object spaces.
According to other optimal technical scheme, can make axial interval and the ratio of stroke amplitude, be at least 1.1.The ratio of axial interval and stroke amplitude can be made as greatlyr, for example, can be 2, and this and two sealed object fluids wellability are separately irrelevant.
When axial interval is set greatlyr to the ratio of stroke amplitude, form good wellability.But, under this situation, it should be noted that this ratio is larger, need the larger space that arranges.Under this situation, importantly, in large as far as possible ratio and compact arranging between space, find rational half-way house.
When wellability is when good, in the mechanical component of sealed object, sealed object fluid starts " climb and move " (creep).Wellability ratio depends on temperature.
On the other hand, axial interval is being set hour to the ratio of stroke amplitude, wellability variation.
According to the present invention, two seal rings of double seal can be shaped integratedly by single parts.Thus, double seal has the structure that parts are few especially, can easily and at low cost manufacture.
According to another technological scheme, double seal can have the packing ring that is disposed at vertically between two seal rings, is fabricated to separately hollow circle tube.Here, preferably the packing ring between two seal rings consists of simple and cheap material.More preferably, packing ring can consist of macromolecular material.For example can use polyamide material.
Packing ring can be close to sealed object surface, also can possess the 1st guide surface of the 2nd guide surface of being close to the 2nd mechanical component, and the 2nd mechanical component and the 1st mechanical component are in devices spaced apart radially, and the 2nd guide surface and packing ring are at diametrically contraposition.The 1st mechanical component can be piston rod for example, now by packing ring guiding the 1st mechanical component in the 2nd mechanical component.The 2nd mechanical component can be housing for example.
The 2nd mechanical component can consist of the housing that for example surrounds the 1st mechanical component.Importantly, the axial length of double seal is larger, can to the 2nd mechanical component, guide the 1st mechanical component well thus.If the relative double seal run-off the straight of the 1st mechanical component, can have a negative impact to the function of double seal and life-span.
Preferably, packing ring can consist of the material that is used for carrying out straight-line guidance.This type of material can be PTFE(teflon for example) and so on macromolecular material.Packing ring can also be manufactured by sintered bronze or stupalith.
Packing ring can axially have flexible and soft part.Conventionally, the double seal in seal arrangement is installed into gapless in the axial direction.When usually using seal arrangement, because double seal is heated, can cause axial expansion.For fear of Yin Wendu, cause that double seal is to axial excessive deformation, can be provided with in the axial direction elasticity and soft part.When double seal during at axial elongation, can make packing ring at axial elasticity and flexibly compressed because of heating.Thus, in the whole working life of seal arrangement, can make double seal in configuration space, not produce gap always.
Packing ring and seal ring can be bonded with each other by bonding force and/or adhered shape.Instead, also can come and engages by thermal bonding and/or this class material laminating (material adherence) of chemical bond.Preferably in advance seal ring is formed jointly to assemblnig unit by engaging with packing ring.Reduce therefrom the not sum of fixed component, make seal arrangement be easy to assembling.
In the engaging of the packing ring forming by adhered shape and two seal rings, existence can non-destructive ground by packing ring the advantage with seal ring decomposition.The classification of the seal arrangement after can using is thus reclaimed and is become easy.
Two seal rings can have identical shaped.Here, two seal rings are with respect to being disposed at the axially imaginary sagittal plane symmetry of central authorities of double seal.Can manufacture easily and assemble double seal thus.
According to another technological scheme, two seal rings can form different shape mutually, and/or consist of different materials.Thus, two seal rings can be suitable for various uses especially well, are especially suitable for different sealed object fluids.For sealing engine oil, seal ring can preferably consist of for example viton (FKM), acrylate rubber (ACM), nitrile butadiene rubber (NBR) or hydrogenated nitrile-butadiene rubber (HNBR).Above-mentioned material does not expand or only minimum expansion while having advantages of with sealed object fluid contact.
Can, by the seal ring preferably being formed by the PTFE that comprises packing materials such as bronze or polyether-ether-ketone (PEEK) such as polytetrafluoroethylene (PTFE), PTFE compound, carry out sealed fuel.For above-mentioned material, while also having advantages of with sealed object fluid contact, do not expand or only minimum expansion.
By selecting all-purpose material, can select respectively the most cheap material in the middle of suitable material.Need not be merely for oil sealing be used expensive PTFE material.Can manufacture at an easy rate seal arrangement of the present invention like this.
Double seal can at least have the static sealing being close to the 2nd mechanical component, bearing static load.By this static sealing, can compensate the coaxial error between the 1st mechanical component and the 2nd mechanical component.Thus, two mechanical components malposition respect to one another can not be delivered to the sealing lip of seal ring.Therefore avoid sealing lip to produce excessive mechanical load.
Static sealing can encircle for O.By it is soft, resilient character compensates the coaxial error producing in some situation between two mechanical components to O ring, static sealing one side of sealing seal ring.
For preventing the inclination of double seal, can use plural O ring.For O ring, can cheap buy the product of all size.Conventionally, also can use seal ring, for example X ring with different cross section, be used as static sealing.
O ring can be disposed in double seal towards the 2nd mechanical component, at the recess of radial opening.Here, the recess of institute's opening can be arranged to double seal, now, two seal rings or be integrally formed by single parts, or utilize packing ring to be engaged with each other.
Each seal ring can have radially with on opposed of the 2nd mechanical component forming ring uplift, bear the static sealing of static load.This ring uplift can be used in combination with illustrated above O ring.
When watching with sectional drawing, the seal ring of seal arrangement for example forms the roughly C shape of opening in the axial direction.Can bear the sealing lip of dynamic load and the protuberance of ring in the configuration of the end of free foot.Here, the initial elasticity power that sealing lip and protuberance produce by the C shape shape by seal ring pushes the mechanical component of sealed object separately.In order to improve sealing lip and the radially pushing force of protuberance to each mechanical component, can in the cavity of seal ring, configure the spring of C shape, this spring is given potential energy to free foot to the mechanical component direction of sealing object.
The 1st mechanical component can be piston rod, and the 2nd mechanical component can for radially with the 1st mechanical component devices spaced apart housing that the 1st mechanical component is surrounded.Thereby make to bear the sealing lip sealing radially inner side of dynamic load, ring uplift sealing radial outside.
Aforesaid seal arrangement can be used to have the fuel reciprocating pump in two sealed object spaces.Here, in two sealed object spaces fills fuel, another fills oil.Fuel reciprocating pump can be used from Motor Vehicle with internal-combustion engine one.
Below, in Fig. 1 to Fig. 8, schematically show 8 embodiments of seal arrangement of the present invention, and explain detailedly.
Accompanying drawing explanation
Fig. 1: represent in the 1st embodiment of seal arrangement, the constructed profile map of the ratio of axially spaced-apart and stroke amplitude, in the present embodiment, two seal rings of double seal are integrally formed by single parts.
Fig. 2: represent the 2nd embodiment's of seal arrangement constructed profile map, in the present embodiment, the outer circumferential side of double seal is surrounded by the annular static sealing of O.
Fig. 3: representation class is similar to the embodiment's of Fig. 1 the 3rd embodiment's constructed profile map, disposes packing ring in the present embodiment between two seal rings of double seal.
Fig. 4: representation class is similar to the embodiment's of Fig. 2 the 4th embodiment's constructed profile map, is provided with the packing ring as the guiding of the 1st mechanical component in the present embodiment in the 2nd mechanical component.
Fig. 5: represent the 5th embodiment's constructed profile map, in the present embodiment, double seal has variform seal ring each other.
Fig. 6: represent the 6th embodiment's constructed profile map, in the present embodiment, two seal rings of double seal are identical shaped and engage with packing ring by adhered shape.
Fig. 7: representation class is similar to the embodiment's of Fig. 3 the 7th embodiment's constructed profile map, and the present embodiment middle washer has flexible and soft part in the axial direction.
Fig. 8: representation class is similar to the 2nd embodiment's of Fig. 2 the 8th embodiment's constructed profile map, in the present embodiment, O ring surrounds the periphery of packing ring as static sealing.
Description of reference numerals
1 double seal
2,3 sealed object fluids
4,5 sealed object spaces
6 the 1st seal rings
7 the 2nd seal rings
8,9 sealing lips
10 axial intervals
11 sealed object surfaces
12 stroke amplitude
13 the 1st mechanical components (piston rod 27)
14 packing rings
15 the 1st guide surfaces
16 the 2nd guide surfaces
17 the 2nd mechanical components (housing 28)
18 parts
19 illusion sagittal planes
20,21,22 static sealings
23 O rings
24 recesses
25,26 protuberances
27 piston rods
28 housings
29 guide surfaces
Embodiment
Fig. 1 to Fig. 8 represents 8 embodiments of seal arrangement.The seal arrangement that forms hollow circle tube has, and the double seal 1 in two sealed object spaces 4,5 of sealed object fluid 2,3 is filled in sealing respectively.Sealing device is applicable to fuel reciprocating pump.The 1st mechanical component 13 is that piston rod 27, the 2 mechanical components 17 are housing 28.In sealed object space, fuel is filled in a sealed object space 4, and engine oil is filled in another sealed object space 5.Fuel can be for example gasoline or diesel fuel.
For sealed object space 4,5 is sealed, double seal 1 has reverse the 1st seal ring 6 and the 2nd seal ring 7 that is configured in axial both ends of the surface side mutually.Two seal rings 6,7 have respectively the sealing lip 8,9 that bears dynamic load, and sealing lip 8,9 is close to the sealed object surface 11 of the 1st mechanical component 13 consisting of piston rod 27 and by its encirclement from outer circumferential side.
The sealing lip 8 of the 1st seal ring 6 is adjacent to the sealing lip 9 of the 2nd seal ring 7 and configure at axially-spaced interval 10, and this interval 10 is greater than stroke amplitude 12 that can reciprocating in the axial direction mechanical component 13.
When the plural sealing lip that bears dynamic load 8,9 is set on each seal ring 6,7, axial interval 10 is, sealing lip on immediate in the axial direction the 1st seal ring 6 and the interval between a sealing lip on the 2nd seal ring 7.
In illustrated embodiment, the ratio of the axial 10 pairs of stroke amplitude 12 in interval is 1.3 herein.
Axial interval 10 between sealing lip 8 and sealing lip 9 is greater than the stroke amplitude 12 of the 1st mechanical component 13, avoid thus by sealed object surface 11, by sealing lip 9, being introduced into sealed object space 5 for the sealed object fluid 2 in the sealed object space 4 of lubrication and seal lip 8, cause it to mix with sealed object fluid 3.
Otherwise also like this, the sealed object fluid 3 in sealed object space 5, when usually using seal arrangement, can not be introduced in sealed object space 4 by sealing lip 8, causes it to mix with sealed object fluid 2.
The 1st embodiment who represents seal arrangement in Fig. 1.Two seal rings 6,7 of double seal 1 are integrally formed by single parts, by the sealed object surface 11 of sealing lip 8,9 dynamic seal (packing) the 1st mechanical components 13, and by protuberance 25,26 static sealing the 2nd mechanical components 17 of ring.Two seal rings 6,7 are integrally formed by single parts, and are formed by same material.
The 2nd embodiment who represents seal arrangement in Fig. 2.The 2nd embodiment is also different from the 1st embodiment shown in Fig. 1 in recess 24 this point of opening in setting between the 1st seal ring 6 in double seal 1 and the 2nd seal ring 7 diametrically towards the 2nd mechanical component 17.In recess 24, dispose O ring 23.Utilize flexible and soft O ring 23, compensate to each other sealed 13,17 issuable coaxial errors of two mechanical components.
In Fig. 3, representation class is similar to Fig. 1 embodiment's the 3rd embodiment.Manufacture respectively two seal rings 6,7, and utilize the packing ring 14 that forms hollow barrel-type, forms for macromolecular material to be engaged with each other herein.
Identical with other embodiments that formed by a plurality of parts, two seal rings 6,7 can be engaged to the unit that formation can be assembled in advance by several different methods with packing ring 14.Can engage by cohesive force and/or adhered shape, or engage by material laminating described later.Also above-mentioned means can be used in combination.
In Fig. 4, represent the 4th embodiment.Here, packing ring 14 is pilot sleeve.Packing ring 14 is close to the sealed object surface 11 of the 1st mechanical component 13 and is surrounded from outer circumferential side, and is close to and surrounds from outer circumferential side by the 2nd mechanical component 17.Like this, double seal 1 and the 1st mechanical component 13 and the 2nd mechanical component 17 both concentric arrangement.Thus, can prevent effectively double seal 1 inclination.
Packing ring 14 has the 1st guide surface 15 of being close to the 2nd guide surface 16 of the 2nd mechanical component 17.Packing ring 14 has the another guide surface 29 of being close to and surrounding the sealed object surface 11 of the 1st mechanical component 13 at radially inner side.
In Fig. 5, represent the 5th embodiment.The 5th embodiment forms configurations differing from one at two seal rings 6,7, and respectively for sealed object fluid 2,3 being sealed and being formed in this point by particularly suitable material, is different from the embodiment shown in Fig. 3.In embodiment shown here, in engine oil one side, use FKM material, in fuel one side, use PTFE material.
In Fig. 6, represent the 6th embodiment.In the 6th embodiment, two seal rings 6,7 engage with packing ring 14 by forming the adhered shape formula joining portion of swallowtail shape.When the maintenance energy at this adhered shape formula joining portion is not enough, in order to maintain double seal 1 when usually using seal arrangement, can to append, set the material binding type joining portion of using thermal bonding for example and/or chemical bond.
In Fig. 7, representation class is similar to the 3rd embodiment shown in Fig. 3, the 7th embodiment of seal arrangement.Here, packing ring 14 has flexible and soft part 18 in the axial direction.This part 18 is disposed at the axial central authorities of double seal 1, by the sagittal plane 19 of illusion, from central authorities, is divided into two.For compensation sealing assembly axis to thermal expansion and this part is set, prevent in excessive distortion and seal arrangement that gap appears in double seal.
The 8th embodiment who represents seal arrangement of the present invention in Fig. 8.The 8th embodiment is substantially the combination of the 2nd embodiment shown in the 3rd embodiment shown in Fig. 3 and Fig. 2.In the axial central authorities of double seal 1, be provided with for accommodating the recess 24 of the O ring 23 of static sealing the 2nd mechanical component 17.
In this embodiment, double seal 1 has 3 static sealings 20,21 and 22 that bear static load, and above-mentioned each static sealing is close to respectively the 2nd mechanical component 17 statically.Static sealing 20 consists of O ring 23, and all the other static sealings 21,22 consist of the ring uplift 25,26 that forms two seal ring 6,7 each self-structure important documents.
Claims (17)
1. a seal arrangement, it is hollow cylinder shape, has the double seal that two sealed object spaces of sealed object fluid are filled respectively in sealing, it is characterized in that:
Described double seal has the 1st seal ring that is disposed at a side in axial both ends of the surface side, and is disposed at the opposing party's the 2nd seal ring,
The the described the 1st and the 2nd seal ring has respectively the sealing lip that at least one bears dynamic load,
In the sealing lip that described the 1st seal ring has, approach a sealing lip of described the 2nd seal ring most, in the sealing lip having with described the 2nd seal ring, approach a sealing lip of described the 1st seal ring most, be spaced from each other axial interval and configure,
The sealing lip that the described the 1st and the 2nd seal ring has is close to the sealed object surface of the 1st mechanical component, and the 1st mechanical component can axially move back and forth along described with the stroke amplitude of regulation,
Described axial interval is greater than the stroke amplitude of the described regulation of described the 1st mechanical component.
2. seal arrangement according to claim 1, is characterized in that, the ratio of the stroke amplitude of described axial interval and described regulation is at least 1.1.
3. seal arrangement according to claim 1 and 2, is characterized in that, the described the 1st and the 2nd seal ring of described double seal can be shaped integratedly by single parts.
4. seal arrangement according to claim 1 and 2, is characterized in that, described double seal has the packing ring that is disposed at vertically between the described the 1st and the 2nd seal ring, manufactures and be separately hollow circle tube.
5. seal arrangement according to claim 4, it is characterized in that, described packing ring is close to described sealed object surface, and possesses the 1st guide surface of the 2nd guide surface of being close to the 2nd mechanical component, the 2nd mechanical component and described the 1st mechanical component are in devices spaced apart radially, and the 2nd guide surface and described packing ring are at diametrically contraposition.
6. according to the seal arrangement described in claim 4 or 5, it is characterized in that, described packing ring consists of macromolecular material.
7. according to the seal arrangement described in any one in claim 4 to 6, it is characterized in that, described packing ring axially has flexible and soft part.
8. according to the seal arrangement described in any one in claim 4 to 7, it is characterized in that, described packing ring and the described the 1st and the 2nd seal ring are bonded with each other by bonding force and/or adhered shape.
9. according to the seal arrangement described in any one in claim 4 to 7, it is characterized in that, described packing ring and the described the 1st and the 2nd seal ring fit to be bonded with each other by material.
10. according to the seal arrangement described in any one in claim 3 to 9, it is characterized in that, the described the 1st and the 2nd seal ring has identical shaped, and the described the 1st and the 2nd seal ring is with respect to the imaginary sagittal plane symmetry that is disposed at the axial central authorities of described double seal.
11. according to the seal arrangement described in any one in claim 3 to 9, it is characterized in that, the described the 1st and the 2nd seal ring forms different shape mutually, and/or consists of different materials.
12. according to the seal arrangement described in any one in claim 1 to 11, it is characterized in that, described double seal at least has the static sealing being close to described the 2nd mechanical component, bearing static load.
13. seal arrangements according to claim 12, is characterized in that, described static sealing is O ring.
14. seal arrangements according to claim 13, is characterized in that, described O ring is configured in described double seal towards described the 2nd mechanical component, at the recess of radial opening.
15. according to the seal arrangement described in any one in claim 1 to 14, it is characterized in that, the described the 1st and the 2nd seal ring has respectively radially with on opposed of the 2nd mechanical component forming ring uplift, bear the static sealing of static load.
16. according to the seal arrangement described in any one in claim 1 to 15, it is characterized in that, described the 1st mechanical component is piston rod, described the 2nd mechanical component be radially with described the 1st mechanical component devices spaced apart housing that described the 1st mechanical component is surrounded.
The using method of seal arrangement that is used for two sealed object spaces that sealed fuel reciprocating pump has in 17. 1 kinds of claims 1 to 16 described in any one, in described two sealed object spaces one fills fuel, another fills oil.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013000514.0A DE102013000514B4 (en) | 2013-01-15 | 2013-01-15 | Sealing arrangement and its use |
| DE102013000514.0 | 2013-01-15 | ||
| JP2013-242184 | 2013-11-22 | ||
| JP2013242184A JP6369013B2 (en) | 2013-01-15 | 2013-11-22 | Sealing device and method of using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103925366A true CN103925366A (en) | 2014-07-16 |
Family
ID=51143686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410018141.6A Pending CN103925366A (en) | 2013-01-15 | 2014-01-15 | Sealing arrangement and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103925366A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538779A (en) * | 2019-01-17 | 2019-03-29 | 广州宝力特密封技术有限公司 | Ball valve combined seal ring and ball valve |
| CN109642675A (en) * | 2016-08-24 | 2019-04-16 | Nok株式会社 | Sealing device |
| CN111536813A (en) * | 2020-05-21 | 2020-08-14 | 大冶海通热工技术有限公司 | Novel sealing structure of vertical movable tube plate tube heat exchanger |
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| FR2549928B1 (en) * | 1983-07-29 | 1987-12-11 | Outillage Air Comprime | DEVICE FOR GUIDING THE SEALING AND SCRAPING OF A STEM ROD |
| CH667141A5 (en) * | 1985-09-02 | 1988-09-15 | Sft Ag Spontanfoerdertechnik | Heavy duty piston rod seal - has hard and soft polymer rings clamped into seal and rod guide |
| US5121930A (en) * | 1990-05-17 | 1992-06-16 | Graco Inc. | Piston seal cartridge for a reciprocating needle |
| EP0550941A1 (en) * | 1992-01-07 | 1993-07-14 | Cooper Cameron Corporation | Stem seal assembly |
| CN2188659Y (en) * | 1993-09-29 | 1995-02-01 | 许进展 | Piston pump |
| US5897119A (en) * | 1997-04-18 | 1999-04-27 | Garlock, Inc. | Floating wiper seal assembly |
| DE102011082007B3 (en) * | 2011-09-01 | 2013-01-10 | Rausch & Pausch Gmbh | Seal and control device with this seal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2549928B1 (en) * | 1983-07-29 | 1987-12-11 | Outillage Air Comprime | DEVICE FOR GUIDING THE SEALING AND SCRAPING OF A STEM ROD |
| CH667141A5 (en) * | 1985-09-02 | 1988-09-15 | Sft Ag Spontanfoerdertechnik | Heavy duty piston rod seal - has hard and soft polymer rings clamped into seal and rod guide |
| US5121930A (en) * | 1990-05-17 | 1992-06-16 | Graco Inc. | Piston seal cartridge for a reciprocating needle |
| EP0550941A1 (en) * | 1992-01-07 | 1993-07-14 | Cooper Cameron Corporation | Stem seal assembly |
| CN2188659Y (en) * | 1993-09-29 | 1995-02-01 | 许进展 | Piston pump |
| US5897119A (en) * | 1997-04-18 | 1999-04-27 | Garlock, Inc. | Floating wiper seal assembly |
| DE102011082007B3 (en) * | 2011-09-01 | 2013-01-10 | Rausch & Pausch Gmbh | Seal and control device with this seal |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109642675A (en) * | 2016-08-24 | 2019-04-16 | Nok株式会社 | Sealing device |
| US10890257B2 (en) | 2016-08-24 | 2021-01-12 | Nok Corporation | Sealing device |
| CN109642675B (en) * | 2016-08-24 | 2021-03-19 | Nok株式会社 | Sealing device |
| CN109538779A (en) * | 2019-01-17 | 2019-03-29 | 广州宝力特密封技术有限公司 | Ball valve combined seal ring and ball valve |
| CN111536813A (en) * | 2020-05-21 | 2020-08-14 | 大冶海通热工技术有限公司 | Novel sealing structure of vertical movable tube plate tube heat exchanger |
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Application publication date: 20140716 |