CN201575149U - Reciprocating dynamic sealing apparatus of self-adapting medium pressure - Google Patents
Reciprocating dynamic sealing apparatus of self-adapting medium pressure Download PDFInfo
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- CN201575149U CN201575149U CN2010200432290U CN201020043229U CN201575149U CN 201575149 U CN201575149 U CN 201575149U CN 2010200432290 U CN2010200432290 U CN 2010200432290U CN 201020043229 U CN201020043229 U CN 201020043229U CN 201575149 U CN201575149 U CN 201575149U
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- elastic rubber
- rubber circle
- slip ring
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Abstract
The utility model relates to a reciprocating dynamic sealing apparatus of self-adapting medium pressure, which comprises a piston, a PTFE slip ring and an elastic force rubber ring, the PTFE slip ring and the elastic force rubber ring are arranged in a piston seal groove, the elastic force rubber ring is mounted at the bottom of the piston seal groove, the PTFE slip ring is sleeved on the elastic force rubber ring, wherein, pressure compensating cavities are respectively arranged at the left side and the right side of the elastic force rubber ring radial section, a pressure adapting cavity is arranged at the radial direction of the inner edge surface of the elastic force rubber ring. The utility model has advantages of simple structure, reasonable and scientific design, strong seal compensating capability, small friction force, good sealing performance and long service life.
Description
Technical field
The utility model belongs to the dynamic seal apparatus field, especially a kind of reciprocating dynamic seal device of self-adapting medium pressure.
Background technique
Along with rapid economic development, enterprise is more and more higher for the high pressure sealing technical requirements in the mechanical structure, sealing technique in the to-and-fro motion at present, for example: general between piston in the hydraulic jack and the cylinder body by the teflon slip ring, be that the PTFE slip ring matches with the elastic rubber circle and realizes sealing, PTFE slip ring outer side wall is close to the cylinder wall of hydraulic jack, the madial wall of PTFE slip ring closely is connected with the elastic rubber circle, this elastic rubber circle is arranged in the piston seal groove, the elastic rubber circle offers PTFE slip ring compensation radial force by the elastic strain of its body, thereby reach the effect of sealing, when but this kind sealing configuration increases when pressure medium, because elastic rubber circle body elastic strain ability changes little, after the PTFE slip ring under high pressure lacks the compensation radial force, be difficult to be close to cylinder wall, cause leakage of oil easily, influence the sealing of whole hydraulic jack, moreover the PTFE slip ring is close to cylinder wall and is connected, the frictional force that it is subjected in relative movement is bigger, has shortened the working life of PTFE slip ring.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of simple in structure, and design science is reasonable, and the sealing compensation ability is strong, and frictional force is less, good seal performance, the reciprocating dynamic seal device of the self-adapting medium pressure of long service life.
The utility model solves its technical problem and is achieved through the following technical solutions:
A kind of reciprocating dynamic seal device of self-adapting medium pressure, comprise piston, PTFE slip ring and elastic rubber circle, PTFE slip ring, elastic rubber circle are arranged in the piston seal groove, the elastic rubber circle is installed in the piston seal groove bottom, the PTFE slip ring sleeve is contained on the elastic rubber circle, wherein the left side of this elastic rubber circle radial cross section and right side are shaped on the pressure compensation chamber respectively, and this elastic rubber circle inner edge surface radially is shaped on the pressure adaptation chamber.
And described elastic rubber circle outer edge surface radially is shaped on distortion and adapts to the chamber.
And the distortion that described elastic rubber circle outer edge surface radially is shaped on two symmetries adapts to the chamber.
And described PTFE slip ring outer edge surface radially is shaped on N liquid storage ring cavity, 1≤N≤4.
And described PTFE slip ring outer edge surface both sides radially are shaped on chamfering.
Advantage of the present utility model and beneficial effect are:
1, the left side of this dynamic seal apparatus elastic rubber circle radial cross section and right side central are shaped on the pressure compensation chamber respectively, this elastic rubber circle inner edge surface radially is shaped on the pressure adaptation chamber, when the oil pressure of hydraulic jack increases, the pressure compensation chamber is under pressure, simultaneously provide radial compensation power to the PTFE slip ring, improved the sealability of dynamic seal apparatus with the acting in conjunction of pressure adaptation chamber.
2, the distortion that radially is shaped on two symmetries of this dynamic seal apparatus elastic rubber circle outer edge surface adapts to the chamber, and itself and pressure compensation chamber and the raising of pressure adaptation chamber acting in conjunction significant sealing affection have increased the adaptivity with oil pressure of elastic rubber circle.
3, the PTFE slip ring outer edge surface of this dynamic seal apparatus radially is shaped on N liquid storage ring cavity, 1≤N≤4, infiltrate hydraulic oil in this liquid storage cylinder and fully play the effect of reducing friction, and PTFE slip ring outer edge surface both sides radially are shaped on chamfering, can in to-and-fro motion, form one deck hydrodynamic lubrication oil film preferably, reduce the frictional force in the relative movement, increase the working life of whole dynamic seal apparatus.
4, of the present utility model simple in structure, design science is reasonable, and the sealing compensation ability is strong, and frictional force is less, and good seal performance is a kind of reciprocating dynamic seal device of self-adapting medium pressure of long service life.
Description of drawings
The structural representation that Fig. 1 uses in hydraulic jack for the utility model;
Fig. 2 is the A portion enlarged view of Fig. 1.
Embodiment
The utility model is described in further detail below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection domain of the present utility model with this.
A kind of reciprocating dynamic seal device of self-adapting medium pressure, comprise cylinder body 1, piston 2, PTFE slip ring 5 and elastic rubber circle 7, the PTFE slip ring, the elastic rubber circle is arranged in the piston seal groove, the elastic rubber circle is installed in the piston seal groove bottom, the PTFE slip ring sleeve is contained on the elastic rubber circle, the outer edge surface of PTFE slip ring is close to the inwall of cylinder body, PTFE slip ring outer edge surface radially is shaped on N liquid storage ring cavity 3,1≤N≤4, the outer edge surface at the PTFE slip ring shown in the present embodiment accompanying drawing 1 is shaped on two liquid storage ring cavities, in order to reduce friction better, be shaped on 5～10 degree chamferings 4 in PTFE slip ring outer edge surface both sides radially, the outer edge surface both sides radially of the PTFE slip ring shown in the present embodiment accompanying drawing 1 are shaped on 7 degree chamferings.Innovative point of the present utility model is: the left side and the right side central of this elastic rubber circle radial cross section are shaped on pressure compensation chamber 8 respectively, and these two pressure compensation chambeies are for being symmetrical arranged; This elastic rubber circle inner edge surface radially is shaped on pressure adaptation chamber 9, and the distortion that elastic rubber circle outer edge surface radially is shaped on two symmetries adapts to chamber 6.
When the utility model is used in hydraulic jack, when hydraulic fluid pressure increases, pressure compensation chamber on the elastic rubber circle is subjected to hydraulic fluid pressure extruding elastic rubber circle, after pressure adaptation chamber and distortion adaptation chamber acting in conjunction, the outer rim of elastic rubber circle has the radial compensation power that makes progress more greatly to pass to the PTFE slip ring, has strengthened the sealability of whole dynamic seal apparatus.If change the adaptive ability that elastic rubber ring cross-section thickness can change the elastic rubber circle in the utility model.
Claims (5)
1. the reciprocating dynamic seal device of a self-adapting medium pressure, comprise piston, PTFE slip ring and elastic rubber circle, PTFE slip ring, elastic rubber circle are arranged in the piston seal groove, the elastic rubber circle is installed in the piston seal groove bottom, the PTFE slip ring sleeve is contained on the elastic rubber circle, it is characterized in that: the left side and the right side of this elastic rubber circle radial cross section are shaped on the pressure compensation chamber respectively, and this elastic rubber circle inner edge surface radially is shaped on the pressure adaptation chamber.
2. the reciprocating dynamic seal device of self-adapting medium pressure according to claim 1 is characterized in that: described elastic rubber circle outer edge surface radially is shaped on distortion and adapts to the chamber.
3. the reciprocating dynamic seal device of self-adapting medium pressure according to claim 1 is characterized in that: the distortion that described elastic rubber circle outer edge surface radially is shaped on two symmetries adapts to the chamber.
4. the reciprocating dynamic seal device of self-adapting medium pressure according to claim 1, it is characterized in that: described PTFE slip ring outer edge surface radially is shaped on N liquid storage ring cavity, 1≤N≤4.
5. according to the reciprocating dynamic seal device of claim 1 or 4 described self-adapting medium pressures, it is characterized in that: described PTFE slip ring outer edge surface both sides radially are shaped on chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200432290U CN201575149U (en) | 2010-01-08 | 2010-01-08 | Reciprocating dynamic sealing apparatus of self-adapting medium pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200432290U CN201575149U (en) | 2010-01-08 | 2010-01-08 | Reciprocating dynamic sealing apparatus of self-adapting medium pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201575149U true CN201575149U (en) | 2010-09-08 |
Family
ID=42695024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200432290U Expired - Fee Related CN201575149U (en) | 2010-01-08 | 2010-01-08 | Reciprocating dynamic sealing apparatus of self-adapting medium pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201575149U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027858A (en) * | 2021-04-07 | 2021-06-25 | 天津科技大学 | Novel piston sealing device |
-
2010
- 2010-01-08 CN CN2010200432290U patent/CN201575149U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027858A (en) * | 2021-04-07 | 2021-06-25 | 天津科技大学 | Novel piston sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20120108 |