CN203035963U - Combined sealing structure of telescoping cylinder - Google Patents
Combined sealing structure of telescoping cylinder Download PDFInfo
- Publication number
- CN203035963U CN203035963U CN 201220741657 CN201220741657U CN203035963U CN 203035963 U CN203035963 U CN 203035963U CN 201220741657 CN201220741657 CN 201220741657 CN 201220741657 U CN201220741657 U CN 201220741657U CN 203035963 U CN203035963 U CN 203035963U
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- sealing ring
- shaped sealing
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Abstract
The utility model relates to a combined sealing structure of a telescoping cylinder. The combined sealing structure comprises a cylinder barrel and a sleeve. An end surface of the telescoping cylinder faces inwards, and a dust ring, an L-shaped guide ring, a drum-shaped sealing ring, another L-shaped guide ring and a U-shaped sealing ring are sequentially arranged on matched surfaces of the cylinder barrel and the sleeve. The combined sealing structure of the telescoping cylinder has the advantages that when under high pressure, the telescoping cylinder is subjected to high pressure sealing by the aid of the characteristic that the tracing ability of the U-shaped sealing ring is improved along with increase of the pressure, and the drum-shaped sealing ring realizes an auxiliary sealing effect; when under low pressure, the U-shaped sealing ring realizes a sealing effect within the normal service life of the U-shaped sealing ring, the drum-shaped sealing ring realizes a main low-pressure sealing effect when the low-pressure sealing performance of the U-shaped sealing ring is deteriorated, and at the moment, the U-shaped sealing ring realizes an auxiliary low-pressure sealing effect; owing to a bidirectional function of the drum-shaped sealing ring, the drum-shaped sealing ring further can realize functions of a second dust ring when turned reversely, and a protective effect is realized effectively; and abrasion to a sealing part is reduced, and the service life of the sealing part is prolonged.
Description
Technical field
The utility model relates to a kind of sealing and dustproof construction, specifically, relates to a kind of sleeve cylinder combined sealing structure.
Background technique
The structure of existing single, double sleeve cylinder bar portion sealing at present has two classes: a class is single U-shaped seal ring sealing, the material of the U-shaped seal ring of this type of seal request is good especially, hardness number is suitable and scope is little, the too high tracing ability of hardness number is bad, the low pressure seal weak effect, inefficacies such as the too low then high pressure sealing of hardness number easily produces flange, tear are so when adopting single U-shaped sealing means, the material of seal ring and production technology thereof directly are Sealing manufacturer's difficult problems.Another kind of is to adopt double-U-shaped seal ring sealing, and the hardness difference, handle the relation of high low pressure sealing, but double-U-shaped sealing one side size is too big, has increased axial length; Because of the characteristic of U-shaped seal ring, can not solve the problem of low pressure seal fully, and its price is also far above the drum type seal ring on the other hand; The actual life of low pressure seal that is exactly U-shaped seal ring in addition is shorter, maintenance and change frequency height.
The model utility content
At above-mentioned deficiency of the prior art, it is a kind of simple in structure, easy to make that the utility model provides, and can reduce cost the sleeve cylinder combined sealing structure that the good sealing effect life-span is long.
Technical solution adopted in the utility model is:
A kind of sleeve cylinder combined sealing structure comprises: cylinder barrel and sleeve, and the sleeve cylinder end face is inside, and the matching surface of cylinder barrel and sleeve is disposed with: dust ring, L type guide ring, drum type seal ring, L type guide ring and U-shaped seal ring.
Described L type guide ring arranges in pairs.
The beneficial effect of the relative prior art of the utility model:
The utility model sleeve cylinder combined sealing structure utilizes the more good characteristics of the more high tracing ability of U-shaped seal ring pressure to carry out high pressure sealing during high pressure, the drum type sealing encloses the auxiliary seal effect; During low pressure, U-shaped seal ring seals when the ordinary life of U-shaped seal ring, and when the low pressure seal performance of U-shaped seal ring descended, the drum type sealing enclosed main low pressure seal effect, and U-shaped sealing encloses the low pressure auxiliary seal.Simultaneously, because the two-way function of drum type seal ring, it oppositely also can play the effect of the second road dust ring, protects better, thereby has reduced the wearing and tearing of Sealing, has prolonged the life-span of Sealing.
Description of drawings
Fig. 1 is the U-shaped seal ring schematic representation of prior art middle sleeve cylinder combined sealing structure list;
Fig. 2 is the double-U-shaped seal ring schematic representation of prior art middle sleeve cylinder combined sealing structure;
Fig. 3 is the utility model sleeve cylinder combined sealing structure schematic representation.
Critical piece symbol description in the accompanying drawing:
Among the figure:
11,21,31, cylinder barrel
12,22,32, U-shaped seal ring
13,23,33, L type guide ring
14,24,34, dust ring
15,25,35, sleeve
16, drum type seal ring.
Embodiment
Followingly with reference to drawings and Examples the utility model is described in detail:
Accompanying drawing 3 as can be known, the utility model sleeve cylinder combined sealing structure, comprise: cylinder barrel 11 and sleeve 15, the sleeve cylinder end face is inside, and the matching surface of cylinder barrel 11 and sleeve 15 is disposed with: dust ring 14, L type guide ring 13, drum type seal ring 16, L type guide ring 13 and U-shaped seal ring 12; Described L type guide ring 13 arranges in pairs.
In the accompanying drawing 3, the seal operation principle of U-shaped seal ring is that hydraulic oil enters U-shaped space, and internally outer seal lip produces pressure, and outer seal lip and trench bottom surfaces are fitted tightly, and interior sealing lip and sleeve outer surface fit tightly, thereby forms sealing.When low pressure, the pressure of sealing lip is reduced, its sealing effect also can reduce, so that the characteristics of U-shaped seal ring are high pressure seal results is good, the low pressure seal effect is relatively poor.And the seal lip pressure of drum type seal ring is the elastic force generation applying power by drum type sealing ring material itself, so be characterized in that the low pressure seal performance is good, high pressure sealing performance is general.Adopt this combination seal, then can produce complementation, obtain good sealing effect, its performance obviously is better than the U-shaped sealing configuration of the list shown in the figure two.In addition, from the life-span of the sealability of Sealing, the high pressure sealing life-span of U-shaped seal ring is long, the low pressure seal life-span is short, the drum type seal ring then is that the low pressure seal life-span is long, the high pressure sealing life-span is short, so this combination seal is to also being better than the double-U-shaped sealing configuration shown in the figure three working life that prolongs Sealing.
Claims (2)
1. sleeve cylinder combined sealing structure, comprising: cylinder barrel and sleeve is characterized in that: the sleeve cylinder end face is inside, and the matching surface of cylinder barrel and sleeve is disposed with: dust ring, L type guide ring, drum type seal ring, L type guide ring and U-shaped seal ring.
2. according to the described sleeve cylinder combined sealing structure of claim 1, it is characterized in that: described L type guide ring arranges in pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220741657 CN203035963U (en) | 2012-12-31 | 2012-12-31 | Combined sealing structure of telescoping cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220741657 CN203035963U (en) | 2012-12-31 | 2012-12-31 | Combined sealing structure of telescoping cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035963U true CN203035963U (en) | 2013-07-03 |
Family
ID=48688092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220741657 Expired - Fee Related CN203035963U (en) | 2012-12-31 | 2012-12-31 | Combined sealing structure of telescoping cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035963U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533562A (en) * | 2018-04-25 | 2018-09-14 | 徐州徐工液压件有限公司 | A kind of high reliability thin-walled multistage hydraulic cylinder sealing system |
-
2012
- 2012-12-31 CN CN 201220741657 patent/CN203035963U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533562A (en) * | 2018-04-25 | 2018-09-14 | 徐州徐工液压件有限公司 | A kind of high reliability thin-walled multistage hydraulic cylinder sealing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20151231 |