CN101725713A - Self-adapting medium pressure reciprocating dynamic sealing device - Google Patents
Self-adapting medium pressure reciprocating dynamic sealing device Download PDFInfo
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- CN101725713A CN101725713A CN201010031331A CN201010031331A CN101725713A CN 101725713 A CN101725713 A CN 101725713A CN 201010031331 A CN201010031331 A CN 201010031331A CN 201010031331 A CN201010031331 A CN 201010031331A CN 101725713 A CN101725713 A CN 101725713A
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Abstract
The invention relates to a self-adapting medium pressure reciprocating dynamic sealing device which comprises a piston, a PTFE slip ring and an elastic rubber ring, wherein the PTFE slip ring and the elastic rubber ring are arranged in a piston seal groove; the elastic rubber ring is installed on the bottom of the piston seal groove; the PTFE slip ring is sheathed on the elastic rubber ring; the left side and the right side of the radial section of the elastic rubber ring are respectively provided with a pressure compensation cavity; and the inner edge of the elastic rubber ring is radially provided with a pressure adapting cavity. The invention has the advantages of simple structure, scientific and reasonable design, strong sealing compensation capacity, small friction force, good sealing property and long service life.
Description
Technical field
The invention 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 objective of the invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, 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 present invention 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 invention 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 invention 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 present invention;
Fig. 2 is the A portion enlarged view of Fig. 1.
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention 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 invention 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 present invention uses 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 among the present invention.
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 |
|---|---|---|---|
| CN201010031331A CN101725713A (en) | 2010-01-08 | 2010-01-08 | Self-adapting medium pressure reciprocating dynamic sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010031331A CN101725713A (en) | 2010-01-08 | 2010-01-08 | Self-adapting medium pressure reciprocating dynamic sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101725713A true CN101725713A (en) | 2010-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010031331A Pending CN101725713A (en) | 2010-01-08 | 2010-01-08 | Self-adapting medium pressure reciprocating dynamic sealing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN101725713A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544411A (en) * | 2010-12-28 | 2012-07-04 | 株式会社杰士汤浅国际 | Electric storage device |
| CN103453146A (en) * | 2013-09-10 | 2013-12-18 | 昆山市巴城镇顺拓工程机械配件厂 | Piston seal ring |
-
2010
- 2010-01-08 CN CN201010031331A patent/CN101725713A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544411A (en) * | 2010-12-28 | 2012-07-04 | 株式会社杰士汤浅国际 | Electric storage device |
| CN102544411B (en) * | 2010-12-28 | 2016-03-02 | 株式会社杰士汤浅国际 | Electrical storage device |
| CN103453146A (en) * | 2013-09-10 | 2013-12-18 | 昆山市巴城镇顺拓工程机械配件厂 | Piston seal ring |
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Open date: 20100609 |