CN1815065A - Energized piston seal ring - Google Patents
Energized piston seal ring Download PDFInfo
- Publication number
- CN1815065A CN1815065A CN 200510018268 CN200510018268A CN1815065A CN 1815065 A CN1815065 A CN 1815065A CN 200510018268 CN200510018268 CN 200510018268 CN 200510018268 A CN200510018268 A CN 200510018268A CN 1815065 A CN1815065 A CN 1815065A
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- China
- Prior art keywords
- seal ring
- groove
- face
- piston seal
- energized piston
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- Sealing Devices (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
An energized piston seal ring features said seal ring being annular flexibility body, whose axial section being a semi enclosed construction composed of seal ring outside diameter surface, two ends surface and taper inside race connected with only one end surface. It contains annular ladder trough, axial direction perforated pin hole, radial perforated groove, groove intersection with pin hole and mutual passing through, seal ring outside diameter surface being outward raised cambered surface. It has three sealing surfaces, i.e. seal ring outside diameter surface, seal ring ladder trough outer end surface and seal ring taper inside race surface. Said invention has advantages of simple structure, cost, small frictional resistance, reliable high and low press sealing property, and capable of uses on defective cylinder etc.
Description
Technical field
The present invention relates to a kind of seal ring that is applied to piston motive sealing in industry oil hydraulic cylinders such as machinery, colliery, metallurgy and the pneumatic linear actuator.
Background technique
At present, the piston motive sealing in known oil hydraulic cylinder or the pneumatic linear actuator all is to finish sealing function by seal ring distortion crush seal cylinder body.Published in 1998 " the various seal rings of introducing in the newly organized oilhydraulic engineering handbook, sealing principle is not always the case.A kind of " self-service reducing reciprocating sealing device " is provided in the patent No. (93208491.5), sealing reliability can be greatly improved, but by practical proof, this kind seal ring has the deficiency of himself: 1, surface friction drag is excessive, often surpasses the surface friction drag of stipulating in the NBS; 2, the seal arrangement number of spare parts is many, and complex structure is compared with traditional seal ring, and a sealing position has more three parts; 3, cost height is because part quantity wide in variety is many and part is comparatively complicated again, so the sealing cost is higher.Above-mentioned deficiency is promoted large size and is played certain negative effect.The patent No. (91100725.3) is compared with the patent No. (93209481.5) with the patent No. (91202818.1), though solved the excessive deficiency of surface friction drag, identical with it, its sealing surfaces is two i.e. an external diameter sealing surfaces and outboard end surfaces.An external diameter sealing surfaces is used for finishing motive sealing, an outside end face is used for finishing static seal, and the initial sealing of outside end face is the axial length realization of adjusting the end face pressure ring by screw thread.In order to reach the condition of setting up sealing, also must in seal ring, install an axially support ring additional and transmit axial force, also must make radial through holes on the support ring, and also will make the duct that communicates with pressure medium on the piston body, so just form a complete sealing system; The deficiency that exists is: the part that seal arrangement needs is more equally, and the problem that cost is high still is not resolved, and large size is promoted and is subjected to certain influence.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art and provide that a kind of sealing component are few, simple in structure, cost is low, surface friction drag is little, the high low pressure sealability is reliable, and the energized piston seal ring that can in defective cylinder barrel, use.
The objective of the invention is this realization: seal ring is that an axial section is the not ring-shaped flexible seal body of closed shape, its axial cross section for by seal ring external diameter surface, both ends of the surface and only with taper that an end face is connected in the semi-closed structure formed of cover.
Feature of the present invention also is: the end face outer radius of an end of being connected with cover in the taper has the ring ladder groove, is evenly equipped with the aperture of axial perforation on the opposite side end face, and the outside of end face has and is the groove that radially connects, the corresponding crossing and perforation with aperture of groove.
The seal ring external diameter surface is the cambered surface that is to outer lug.
The bigger diameter end and the end face of cover are connected as one in the said taper, and the internal diameter of the miner diameter end of cover is less than the footpath, the end of piston seal groove matching used with it in the taper.
The internal diameter of said end face has the groove that prolongs the centerline direction setting, and the radial groove in the groove and the end face outside intersects and connects.
The each several part wall thickness of the axial cross section of said seal ring is close.
The unsettled termination of cover miner diameter end is a disjunctor thick ring shape structure in the said taper.
The material of said seal ring is an elongation percentage greater than 50% engineering plastics, macromolecular material, rubber and plastic composite, rubber material.
Said trench cross section is rectangle, semicircle, triangle, ellipse.
The present invention is when oil hydraulic cylinder or pneumatic linear actuator work, in the corresponding hydraulic fluid port fluid injection process, liquid enters in the seal ring by groove, the aperture of piston packing end face, according to the pascal's principle in the physics, seal ring will be to sealed superficial expansion, along with increasing of pressure, sealing effect is further strengthened.
Sealing surfaces of the present invention is three surfaces: i.e. the exterior edge face of step trough one side of seal ring external diameter surface, seal ring and the taper inner surface of inner race of seal ring.Initial sealing power of the present invention is by path expanding distortion in the seal ring inner conical cover, and the radial force in footpath is finished at the bottom of the piston head seal groove and closely be enclosed within.Along with the increase of pressure, the sealability of cover is further strengthened in the taper.Compared with prior art, the present invention is essentially different on initial sealing and mechanism of static seal, does not promptly have support ring, there is not threaded adjustment mechanisms, the hole of need not buying oil on piston body has again not only been reduced processing accessories quantity, and has been reduced processing cost.Under the identical situation of motive sealing width, static seal has partly increased considerably the effective seal width, and sealability is compared and obtained bigger raising.And in the processing of new cylinder, can reduce the quality requirement of cylinder barrel sealing surfaces, in repairing old oil cylinder or cylinder, can not do under the condition of change at original piston seal groove, replacing with seal ring of the present invention just can use, not only fresh processed cylinder barrel can use, and the defectives such as hole, bloated cylinder, distortion that can also come off, scratch, become rusty the coating that old cylinder barrel sealing surfaces occurs equally also can play the same sealing effect of new cylinder barrel.Have that the sealing component are few, simple in structure, cost is low, surface friction drag is little, the high low pressure sealability is reliable and can in defective cylinder barrel, use, the cylinder barrel sealing surfaces is required advantages such as low.
Below in conjunction with accompanying drawing the present invention is described in further detail:
Description of drawings
Fig. 1 is an axial view of the present invention
Fig. 2 is the axial section structural drawing of Fig. 1
Fig. 3 is applied in axial section structural drawing in single-action hydraulic cylinder or the pneumatic linear actuator for the present invention.
Fig. 4 is applied in axial section structural drawing in double-acting hydraulic cylinder or the pneumatic linear actuator for the present invention.
Embodiment
Among Fig. 1, Fig. 2, seal ring 1 is annular flexible body, its axial cross section for by seal ring external diameter surface 2, end face 3, end face 4 and with taper that end face 3 is connected in overlap the semi-closed structure of the 5 approximate C types of forming.Cover 5 its internal surfaces shape on surface that promptly contacts with the piston seal bottom land is taper under free state in the taper.Cover 5 bigger diameter ends are connected with seal ring end face 3 in the taper, and the internal diameter of cover 5 miner diameter ends is less than the footpath, the end of the piston seal groove supporting with it in the taper.The internal diameter of cylinder that seal ring 1 external diameter uses greater than matching with it, and seal ring external diameter surface 2 is the cambered surface to outer lug, and the axial width of seal ring is more smaller than piston seal well width.There is a disjunctor thick ring 10 cover 5 miner diameter end terminations in the taper, and this annulus is used for the positive pressure of the initial static seal between enhanced leaktightness circle and the piston.End face 3 outer radius have ring ladder groove 9.Be evenly equipped with the aperture 6 of axial perforation wall thickness on the end face 4, the outside of end face 4 has and is radially the groove 7 that connects, and groove 7 intersects with aperture 6 and is used to mutually, and the internal diameter of end face 4 has and prolongs the groove 8 that centerline direction is provided with, and groove 8 and groove 7 are crossing also to be used to mutually.11 are the hollow of seal ring 1 cavity of energizing.
Among Fig. 3, seal ring 1 is inserted in the seal groove of piston head 16, anti-extrusion ring 15 is enclosed within the stepped shaft groove 9 of seal ring 1, at this moment, the interior cover of the taper of seal ring 1 path relies on piston head 16 bottom lands footpath and swells, point to the positive pressure at piston head 16 centers because of cover path in the taper swells to have produced, thereby finished the initial static seal of seal ring 1 with respect to piston head 16.Piston head 16 is before the cylinder barrel 12 of not packing into, and seal ring 1 is to outer lug, and the difference in diameter because of the peak and the cylinder barrel 12 of seal ring 1 projection has produced radially positive pressure, thereby reached the necessary condition of initial sealing.Increased pressure along with no bar pressure chamber 13, working medium is along with the end face drainage groove 7 of seal ring 1, after arriving the end face drainage aperture 6 of seal ring 1, the final cavity 11 of energizing that arrives, according to pascal's principle, on the internal diameter projection plane 17 that the pressure action of working medium parallels to the axis, strengthened the motive sealing effect of seal ring in the seal ring chamber.On the external diameter projection plane 18 that parallels to the axis of operation medium in the chamber, strengthened the static seal effect of seal ring 1.End face drainage groove 7 is made radial groove and is reached on the corresponding exterior edge face of seal ring 1.End face drainage aperture 6 is ducts of the corresponding end-faces of seal ring 1.When working pressure was cancelled, sap cavity 11 pressure of energizing were cancelled with system pressure, and the positive pressure that this moment, seal ring 1 acted on the cylinder barrel 12 also reduces along with the variation of pressure, and frictional force also reduces immediately, thereby reaches the requirement of the formula compensation sealing of energizing.
Among Fig. 4, with usage mode shown in Figure 3 only is to need and increased a pressure chamber along with the double acting cylinder function, and one of them is no bar pressure chamber 13, and another is for there being bar pressure chamber 14, the corresponding seal ring 1 of each pressure chamber, its sealing principle and shown in Figure 3 identical.The installation direction of seal ring 1 will make non-drainage end face become the axial force supporting plane, and two active force supporting planes are positioned opposite.12 is cylinder barrel, and 16 is piston head.
Claims (10)
1, a kind of energized piston seal ring, its end face (3) outer radius has ring ladder groove (9), it is characterized in that: seal ring (1) is that an axial section is the not ring-shaped flexible seal body of closed shape, and its axial cross section is for reaching the semi-closed structure that cover (5) is formed in the taper that is connected with end face (3) by seal ring external diameter surface (2), both ends of the surface (3,4).
2, energized piston seal ring according to claim 1 is characterized in that: the bigger diameter end and the end face (3) of cover (5) are connected as one in the taper, and the internal diameter of the miner diameter end of cover (5) is less than the footpath, the end of piston seal groove matching used with it in the taper.
3, energized piston seal ring according to claim 1 is characterized in that: be evenly equipped with the through hole (6) of axial perforation on the end face (4), the outside of end face (4) has and is radially the groove (7) that connects, and groove (7) and through hole (6) are corresponding crossingly also to be passed through mutually.
4, energized piston seal ring according to claim 3 is characterized in that: groove (7) cross section is rectangle, semicircle, triangle, ellipse.
5, energized piston seal ring according to claim 1 is characterized in that: the internal diameter of end face (4) has the groove (8) that prolongs the centerline direction setting, and groove (8) passes through mutually with the radial groove (7) in end face (4) outside.
6, energized piston seal ring according to claim 5 is characterized in that: groove (8) cross section is rectangle, semicircle, triangle, ellipse, circle.
7, energized piston seal ring according to claim 1 is characterized in that: seal ring external diameter surface (2) is for being the cambered surface to outer lug.
8, energized piston seal ring according to claim 1 is characterized in that: the each several part wall thickness of the axial cross section of seal ring (1) is close.
9, energized piston seal ring according to claim 1 is characterized in that: the unsettled termination (10) of cover (5) is a disjunctor thick ring shape structure in the taper.
10, energized piston seal ring according to claim 1 is characterized in that: the material of seal ring is an elongation percentage greater than 50% engineering plastics, macromolecular material, rubber and plastic composite, rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100182689A CN100520125C (en) | 2005-02-06 | 2005-02-06 | Energized piston seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100182689A CN100520125C (en) | 2005-02-06 | 2005-02-06 | Energized piston seal ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1815065A true CN1815065A (en) | 2006-08-09 |
| CN100520125C CN100520125C (en) | 2009-07-29 |
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ID=36907377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100182689A Active CN100520125C (en) | 2005-02-06 | 2005-02-06 | Energized piston seal ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100520125C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281890A (en) * | 2018-11-09 | 2019-01-29 | 湖南师范大学 | A kind of hydraulic cylinder combined sealing structure and hydraulic cylinder |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4111887C2 (en) * | 1991-04-09 | 1999-10-21 | Mannesmann Ag | Sealing of a pressure cylinder operated working cylinder |
| CN2163904Y (en) * | 1993-01-09 | 1994-05-04 | 王克峰 | Self-sealing device |
| CN2165290Y (en) * | 1993-03-27 | 1994-05-18 | 刘成华 | Reduced reciprocating sealing device |
| CN2224306Y (en) * | 1995-06-30 | 1996-04-10 | 国营建昌机器厂 | Sealing device for hydraulic-cylinder piston rod |
| CN1194339A (en) * | 1997-03-26 | 1998-09-30 | 张革 | Leakless hydraulic cylinder |
| CN2830800Y (en) * | 2005-02-06 | 2006-10-25 | 张革 | Piston sealing ring |
-
2005
- 2005-02-06 CN CNB2005100182689A patent/CN100520125C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281890A (en) * | 2018-11-09 | 2019-01-29 | 湖南师范大学 | A kind of hydraulic cylinder combined sealing structure and hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100520125C (en) | 2009-07-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hubei Yu Yu mechanical and Electrical Hydraulic Technology Co., Ltd. Assignor: Zhang Ge Contract record no.: 2011420000109 Denomination of invention: Energized piston seal ring Granted publication date: 20090729 License type: Exclusive License Open date: 20060809 Record date: 20110610 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Hubei Yu Yu mechanical and Electrical Hydraulic Technology Co., Ltd. Assignor: Zhang Ge Contract record no.: 2011420000109 Date of cancellation: 20161020 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20060809 Assignee: HUBEI XIANGYANG HANGXIANG HYDRAULIC SERVO TECHNOLOGY CO., LTD. Assignor: Zhang Ge Contract record no.: 2016420000026 Denomination of invention: Energized piston seal ring Granted publication date: 20090729 License type: Exclusive License Record date: 20161020 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161222 Address after: 441000 Chaoyang Road, Fancheng District, Hubei, Xiangyang, China Patentee after: Liang Suzhen Address before: 441002 Jianchang, Hubei Mayor Han Road, compound 26-604 Patentee before: Zhang Ge |