CN201521650U - Two-way movement combined type piston sealing piece - Google Patents
Two-way movement combined type piston sealing piece Download PDFInfo
- Publication number
- CN201521650U CN201521650U CN200920278743XU CN200920278743U CN201521650U CN 201521650 U CN201521650 U CN 201521650U CN 200920278743X U CN200920278743X U CN 200920278743XU CN 200920278743 U CN200920278743 U CN 200920278743U CN 201521650 U CN201521650 U CN 201521650U
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- piston
- sealing strip
- external diameter
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Abstract
The utility model discloses a two-way movement combined type piston sealing piece, which is invented for solving the problems of narrow pressure application range and creeping in the prior art. The sealing piece at least comprises a seal tape, two ring-shaped sleeve retainers and an elastic body, wherein the seal tape is arranged between the two retainers and is a ring-shaped sleeve with the external diameter larger than that of each retainer, and the external diameter of the seal tape protrudes outwards relative to the outer surfaces of the retainers and is in contact with a cylinder wall; the elastic body is arranged in the space between the interiors of the retainers and the seal tape and the outer wall of a piston; the inner wall of the elastic body is sleeved on the outer wall of the piston; and a ring-shaped bulge is arranged outwards at the middle part of the outer wall of the elastic body to form an upper cog and a lower cog with the outer wall of the elastic body, the external diameter of each cog is larger than the internal diameter of each retainer, and the upper and the lower cogs are respectively arranged between the end surfaces of the two retainers. By adopting the structure, the sealing piece has the advantages of simple groove structure, lower friction force, no creeping phenomenon, stable running and high operational reliability, can be applied to occasions with ultra-low speed and high-speed movements, allows a larger extrusion clearance, and is suitable to apply to high-voltage and long-stroke environments.
Description
Technical field
The utility model relates to a kind of piston seal, especially is fit to the built-up piston Sealing of piston two-way motion.
Background technique
The existing piston Sealing, as shown in Figure 1, 2, casing wall 1, piston 2, Sealing 3, wear-resistant ring 4, support ring 5, extrude gap 6, because there is creeping phenomenon in the defective of Sealing self structure when Sealing is with the piston slow running, and the pressure range that the Sealing of this kind structure is suitable for is narrow, cause the gap that is suitable for less, to have relatively high expectations relative with installation process of processing request of piston, Applicable scope is narrower.
The model utility content
In order to overcome above-mentioned defective, the purpose of this utility model is to provide that a kind of suitable pressure range is wide, good sealing performance bidirectional-movement built-up piston Sealing.
In order to achieve the above object, bidirectional-movement built-up piston Sealing of the present utility model is made up of sealing strip, back-up ring and elastomer at least, wherein,
Back-up ring is specially an annular cover, supports being arranged on the piston, and described back-up ring is two;
Sealing strip is arranged between described two back-up rings, and described sealing strip is specially the annular cover of external diameter greater than described back-up ring external diameter, and the described relatively back-up ring outer surface of the external diameter of described sealing strip outwards protrudes and contacts with casing wall;
Elastomer, be arranged in the space between described back-up ring and sealing strip inside and the piston outer wall, described elastomer inner wall sleeve is located on the piston outer wall, the outer wall middle part is to being outside equipped with annular relief, described lug boss and described elastomer outer wall form two fins up and down, described two fin external diameters are greater than described back-up ring internal diameter, and described two fins up and down are separately positioned between the two back-up ring end faces.
Wherein, also comprise the bearing ring that is arranged at least on one of them back-up ring, described bearing ring is an air ring, and described bearing ring is arranged on the piston, described air ring external diameter is consistent with described back-up ring external diameter, and internal diameter is less than described back-up ring internal diameter and elastomer outer diameter.
Further, described sealing strip outer surface is to being outside equipped with annular projection, and the described relatively back-up ring outer surface of the annular projection of described sealing strip outwards protrudes and contacts with casing wall.
Particularly, the annular cover that constitutes a described back-up ring wherein end inwardly is provided with annular boss, and described elastomeric outer diameter is less than described annular boss internal diameter.
Above-mentioned structure, back-up ring supports and is arranged on the piston, the employing polyformaldehyde material is made, has oil resistant, heatproof, compressive strength is higher, shock resistance better and self-lubricating property arranged, elastomer is arranged on back-up ring and sealing strip inside, and, get up and down by being located at its outer wall that fin is stuck in the back-up ring both ends of the surface, prevent that effectively elastomer is extruded in the gap of piston and casing wall, in addition, sealing strip adopts high resilience, the wear-resistant seal material is made, and is arranged between two back-up rings, prevent wearing and tearing, this kind structure, groove structure is simple, and frictional force is lower, no creeping phenomenon, occasion for utmost point low speed and high-speed motion all is suitable for, and allows bigger top clearance, operates steadily, the functional reliability height is fit to be applied to high pressure and long stroke environment.
Description of drawings
Fig. 1 is the piston seal sectional structure schematic representation of background technique.
Fig. 2 is the piston seal user mode sectional structure schematic representation of background technique.
Fig. 3 is the sectional structure schematic representation of the utility model specific embodiment.
Fig. 4 is the specific embodiment partial structurtes schematic representation of the utility model back-up ring.
Fig. 5 is the specific embodiment partial structurtes schematic representation of the utility model sealing strip.
Fig. 6 is the elastomeric specific embodiment partial structurtes of the utility model schematic representation.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Shown in Fig. 1-6, bidirectional-movement built-up piston Sealing of the present utility model is made up of sealing strip 20, back-up ring 10 and elastomer 30 at least, wherein,
Back-up ring is specially an annular cover, supports being arranged on the piston, and described back-up ring is two; The employing polyformaldehyde material is made.
Sealing strip, be arranged between described two back-up rings, described sealing strip is specially the annular cover of external diameter greater than described back-up ring external diameter, and described sealing strip upper and lower end face contacts with described back-up ring end face respectively, and the described relatively back-up ring outer surface of the external diameter of described sealing strip outwards protrudes and contacts with casing wall; Further, described sealing strip outer surface is to being outside equipped with annular projection 21, and the described relatively back-up ring outer surface of the annular projection of described sealing strip outwards protrudes and contacts with casing wall.Adopt high resilience, wear-resistant seal material to make,
Elastomer, be arranged in the space between described back-up ring and sealing strip inside and the piston outer wall, described elastomer inner wall sleeve is located on the piston outer wall, the outer wall middle part is to being outside equipped with annular relief 31, described lug boss and described elastomer outer wall form fin 32, following fin 33, described two fin external diameters are greater than described back-up ring internal diameter, and described two fins up and down are separately positioned between the two back-up ring end faces.
Wherein, also comprise the bearing ring 40 that is arranged at least on one of them back-up ring, described bearing ring is an air ring, and described bearing ring is arranged on the piston, described air ring external diameter is consistent with described back-up ring external diameter, and internal diameter is less than described back-up ring internal diameter and elastomer outer diameter.Described bearing ring is made by nylon material.
As another specific embodiment of the present utility model, the annular cover that constitutes a described back-up ring wherein end inwardly is provided with annular boss 11, by fixing described elastomeric two fins up and down of described annular boss end face, as shown in Figure 1, in this specific embodiment, described elastomeric outer diameter is less than described annular boss internal diameter.
This kind structure, in the course of the work, bearing ring is given the back-up ring be in contact with it with propagation of pressure, thereby makes sealing strip and the elastomer generation resiliently deformable that is squeezed, and sealing strip compressive strain expands outwardly outer wall and seals more with casing wall and contact the increase sealability; The inside extrusion piston arm of elastomer compressive strain inwall, and the gap between the piston reduces the increase sealing load; Therefore, the pressure that bears is high more, and the sealing between Sealing and casing wall and the piston is good more.
Above-mentioned structure, back-up ring support and to be arranged on the piston, have oil resistant, heatproof, compressive strength is higher, shock resistance is better and self-lubricating property is arranged; And,, elastomer is arranged on back-up ring and sealing strip inside and gets up and down by being located at its outer wall that fin is stuck in the back-up ring both ends of the surface, prevents that effectively elastomer is extruded in the gap of piston and casing wall; In addition, sealing strip is arranged between two back-up rings, prevents wearing and tearing, prolongs seal durability; Bearing ring is arranged on the back-up ring outside; directly contact with the medium in the casing wall; bear pressure; the bearing ring good toughness of making by nylon; heat-resistant, wear-resistant; performance with selflubricating, shock absorbing and vibration is effectively protected back-up ring and sealing strip, elastomer, and the pressure that described Sealing can be born is higher.
Groove structure is simple, and frictional force is lower, and no creeping phenomenon all is suitable for for the occasion of utmost point low speed and high-speed motion, allows bigger top clearance, operates steadily, and the functional reliability height is fit to be applied to high pressure and long stroke environment.
The utility model is not limited to above-mentioned mode of execution; no matter on its shape or structure, do any variation; every to utilize above-mentioned bidirectional-movement built-up piston Sealing all be a kind of distortion of the present utility model, all should think and drop within the utility model protection domain.
Claims (4)
1. a bidirectional-movement built-up piston Sealing is characterized in that, form by sealing strip, back-up ring and elastomer at least, wherein,
Back-up ring is specially an annular cover, supports being arranged on the piston, and described back-up ring is two;
Sealing strip is arranged between described two back-up rings, and described sealing strip is specially the annular cover of external diameter greater than described back-up ring external diameter, and the described relatively back-up ring outer surface of the external diameter of described sealing strip outwards protrudes and contacts with casing wall;
Elastomer, be arranged in the space between described back-up ring and sealing strip inside and the piston outer wall, described elastomer inner wall sleeve is located on the piston outer wall, the outer wall middle part is to being outside equipped with annular relief, described lug boss and described elastomer outer wall form two fins up and down, described two fin external diameters are greater than described back-up ring internal diameter, and described two fins up and down are separately positioned between the two back-up ring end faces.
2. bidirectional-movement built-up piston Sealing as claimed in claim 1, it is characterized in that, also comprise the bearing ring that is arranged at least on one of them back-up ring, described bearing ring is an air ring, described bearing ring is arranged on the piston, described air ring external diameter is consistent with described back-up ring external diameter, and internal diameter is less than described back-up ring internal diameter and elastomer outer diameter.
3. bidirectional-movement built-up piston Sealing as claimed in claim 1 or 2 is characterized in that, described sealing strip outer surface is to being outside equipped with annular projection, and the described relatively back-up ring outer surface of the annular projection of described sealing strip outwards protrudes and contacts with casing wall.
4. bidirectional-movement built-up piston Sealing as claimed in claim 1 or 2 is characterized in that, the annular cover that constitutes a described back-up ring wherein end inwardly is provided with annular boss, and described elastomeric outer diameter is less than described annular boss internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920278743XU CN201521650U (en) | 2009-11-09 | 2009-11-09 | Two-way movement combined type piston sealing piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920278743XU CN201521650U (en) | 2009-11-09 | 2009-11-09 | Two-way movement combined type piston sealing piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201521650U true CN201521650U (en) | 2010-07-07 |
Family
ID=42507826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920278743XU Expired - Fee Related CN201521650U (en) | 2009-11-09 | 2009-11-09 | Two-way movement combined type piston sealing piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201521650U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954222A (en) * | 2011-08-26 | 2013-03-06 | 优泰科(苏州)密封技术有限公司 | Piston rod sealing part |
| CN112343936A (en) * | 2019-08-06 | 2021-02-09 | 舍弗勒技术股份两合公司 | Double-clutch operating device suitable for automobile clutch |
-
2009
- 2009-11-09 CN CN200920278743XU patent/CN201521650U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954222A (en) * | 2011-08-26 | 2013-03-06 | 优泰科(苏州)密封技术有限公司 | Piston rod sealing part |
| CN112343936A (en) * | 2019-08-06 | 2021-02-09 | 舍弗勒技术股份两合公司 | Double-clutch operating device suitable for automobile clutch |
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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: 20100707 Termination date: 20121109 |