CN105221512B - A kind of hydraulic cylinder new type sealing device - Google Patents
A kind of hydraulic cylinder new type sealing device Download PDFInfo
- Publication number
- CN105221512B CN105221512B CN201510709206.6A CN201510709206A CN105221512B CN 105221512 B CN105221512 B CN 105221512B CN 201510709206 A CN201510709206 A CN 201510709206A CN 105221512 B CN105221512 B CN 105221512B
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- Prior art keywords
- annular
- lip
- dust
- ring
- seal
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Abstract
A kind of hydraulic cylinder new type sealing device, including cylinder body, piston rod, seal and back-up ring, also include lip packing coil structures, the lip packing coil structures are made up of annular seal groove and lip-type packing, the annular seal groove vertical section is rectangle, bottom carries annular boss, the vertical section of the lip-type packing is ladder structure of right angle, annular groove is respectively equipped with the right angle waist of right-angled trapezium and bottom, the annular boss of annular groove and annular seal groove on the lip-type packing bottom coordinates, the upper side wall of the right angle waist and annular seal groove of the right-angled trapezium coordinates, the right-angled trapezium upper bottom edge and piston rod coordinate.Lip-type packing has more preferable sealing effectiveness than one side sealing ring；Ladder-shaped sealing ring can not only reach sealing effectiveness, also produce squeezing action to lip-type packing, further increase sealing property；Dust-proof seal ring is longer using the sealing ring life-span；The sealing device install convenient, compact conformation, rationally.
Description
Technical field
The invention is related to a kind of hydraulic cylinder new type sealing device, belongs to technical field of sealing technology.
Background technology
Hydraulic cylinder is used in bender or cutter work, can all affect the problem of its operating accuracy.Existing hydraulic pressure
The rubber seal of multiple types is continued to use in cylinder sealing always, reaches sealing effectiveness by cushion rubber natural resiliency, and the shortcoming of this kind of sealing
It is to wear no resistance, and easily aging deformation, so as to its poor sealing performance, service life is low.It is contemplated that operating pressure ratio is larger
With the frequent back and forth movement of piston rod, in design, installation sealing device, can avoid, using traditional sealing ring, improving which close
Envelope effect.
Content of the invention
For the deficiencies in the prior art, the purpose of the invention is to provide a kind of hydraulic cylinder new type sealing device, not only
Novel in design, rational in infrastructure, using, easy for installation, performance safety reliability, and can effectively improve and keep the close of hydraulic cylinder
Sealing property.
For achieving the above object, the invention is realized by following technological means：
A kind of hydraulic cylinder new type sealing device, including cylinder body, piston rod, seal and back-up ring, it is characterised in that：Also include
Lip packing coil structures, the lip packing coil structures are made up of annular seal groove and lip-type packing, the annular seal groove
Vertical section is rectangle, and with annular boss, the vertical section of the lip-type packing is ladder structure of right angle, in right-angled trapezium for bottom
Right angle waist and bottom on be respectively equipped with annular groove, the annular groove and ring packing on the lip-type packing bottom
The annular boss of groove coordinates, and the upper side wall of the right angle waist and annular seal groove of the right-angled trapezium coordinates, in the right-angled trapezium
Base and piston rod coordinate.
Further：
Ladder-shaped sealing ring is additionally provided with the annular seal groove, and the vertical section of the ladder-shaped sealing ring is tied for right-angled trapezium
Structure, the right angle waist of the ladder structure of right angle and annular seal groove lower wall coordinate, the oblique angle waist of the ladder structure of right angle and
The oblique angle waist of the lip-type packing coordinates.
The ladder-shaped sealing ring and the annular seal groove adopt interference fits.
Chamfering is provided between the side wall and diapire of the annular groove on the lip-type packing bottom.
Dust-proof sealing structure is additionally provided between the cylinder body and piston rod, is stretched out along piston rod and is arranged on cylinder body direction successively
It is classified as seal and back-up ring, lip seal configuration, dust-proof sealing structure.
The dust-proof sealing structure is arranged on piston rod and stretches out cylinder body port.
The dust-proof sealing structure is made up of annular dust seal groove and dust-proof seal ring, the annular dust seal bottom land
Portion is provided with annular boss, and the dust-proof seal ring upper surface and lateral surface are respectively equipped with annular groove, outside the dust-proof seal ring
The annular groove of side is coordinated with the annular boss of annular dust seal trench bottom, and the dust-proof seal ring upper surface and annular are anti-
Dirt seal groove upper side wall coordinates.
The medial surface that the dust-proof seal ring and piston rod coordinate is provided with the circular arc for caving inward.
The beneficial effect of the invention is：Lip-type packing has more preferable sealing effectiveness than one side sealing ring；Trapezoidal sealing
Circle can not only reach sealing effectiveness, also produce squeezing action to lip-type packing, further increase sealing property；Dust-proof seal ring
Longer using the sealing ring life-span；The sealing device install convenient, compact conformation, rationally.
Description of the drawings
Fig. 1 is the innovation and creation sectional view；
Fig. 2 is lip-type packing structural representation；
Fig. 3 is annular seal groove, annular dust seal slot structure schematic diagram；
Fig. 4 is dust-proof seal ring structural representation.
Specific embodiment
Below in conjunction with Figure of description, the invention is further described.
A kind of hydraulic cylinder new type sealing device, including cylinder body 2, piston rod 1, seal 3 and back-up ring 4, it is characterised in that：Also
Including lip packing coil structures, the lip packing coil structures are made up of annular seal groove 8 and lip-type packing 5, the annular
8 vertical section of seal groove is rectangle, and with annular boss 801, the vertical section of the lip-type packing 5 is that right-angled trapezium is tied for bottom
Structure, is respectively equipped with annular groove 501,502,5 bottom of the lip-type packing on the right angle waist of right-angled trapezium and bottom
On annular groove 502 and the annular boss 801 of annular seal groove 8 coordinate, the right angle waist of the right-angled trapezium and ring packing
The upper side wall of groove 8 coordinates, and the right-angled trapezium upper bottom edge and piston rod 1 coordinate.
The sealing of the annular boss 801 of annular groove 502 and annular seal groove on 5 bottom of lip-type packing is used as one
Reinforcement sealing structure is planted, if seal 3 and back-up ring 4 occur seepage hydraulic oil phenomenon, guarantee sealing function can be played；And
The annular groove 501 of right-angled trapezium right angle waist can deposit the hydraulic oil for leaking down, and the pressure along with hydraulic oil, right angle ladder
The annular groove 501 of shape right angle waist is expanded outwardly, and makes lip-type packing 5 tightly fit with cylinder body 2, further strengthens sealing effect
Really.
Further：
Ladder-shaped sealing ring 6 is additionally provided with the annular seal groove, and the vertical section of the ladder-shaped sealing ring 6 is right-angled trapezium
Structure, the right angle waist of the ladder structure of right angle and ring packing groove sidewall coordinate, the oblique angle waist of the ladder structure of right angle and
The oblique angle waist of the lip-type packing coordinates.
The ladder-shaped sealing ring 6 and interference fits are adopted in the annular seal groove 8.
Lip-type packing 5 is extruded by 6 interference fits of ladder-shaped sealing ring, can further improve lip-type packing 5
Sealing effectiveness, while ladder-shaped sealing ring 6 also has the effect of back-up ring concurrently.
Chamfering 503 is provided between the side wall and diapire of the annular groove 502 on 5 bottom of the lip-type packing.
The effect of rounding 503 can reduce the deformation at work of lip-type packing 5, lower the fatigue damage of work,
Sealing effectiveness is improved, is also beneficial to install.
Dust-proof sealing structure is additionally provided between the cylinder body and piston rod, is stretched out along piston rod and is arranged on cylinder body direction successively
It is classified as seal 3 and back-up ring 4, lip seal configuration, dust-proof sealing structure.
The dust-proof sealing structure is arranged on piston rod 1 and stretches out 2 port of cylinder body.
The dust-proof sealing structure is made up of annular dust seal groove 9 and dust-proof seal ring 7, the annular dust seal groove
9 bottoms are provided with annular boss 901, and 7 upper surface of the dust-proof seal ring and lateral surface are respectively equipped with annular groove 701,702, institute
The annular groove 702 and the annular boss 901 of annular dust seal trench bottom for stating 7 lateral surface of dust-proof seal ring coordinates, described anti-
7 upper surface of dirt sealing ring and annular 9 upper side wall of dust seal groove coordinate.
The medial surface that the dust-proof seal ring 7 and piston rod coordinate is provided with the circular arc 703 for caving inward.
The sunken inside of the dust-proof seal ring is to concentrate on sunken inside upper and lower two with plunger rod contacts pressure in circular arc effect
End, so can preferably play the effect of " scraper plate ", and dust seal performance is greatly improved.
General principle, principal character and the advantage of the invention has been shown and described above.The technical staff of the industry
It should be appreciated that the design is not restricted to the described embodiments, the simply explanation the design described in above-described embodiment and specification
Principle, on the premise of without departing from the design spirit and scope, the invention also has various changes and modifications, these change
Change and improve and both fall within the range of claimed the design.The claimed scope of the invention is by appending claims
And its equivalent thereof.
Claims (8)
1. a kind of hydraulic cylinder new type sealing device, including cylinder body, piston rod, seal and back-up ring, it is characterised in that：Also include lip
Shape sealing ring structure, the lip packing coil structures are made up of annular seal groove and lip-type packing, and the annular seal groove is erected
Rectangular cross-section, bottom carry annular boss, and the vertical section of the lip-type packing is ladder structure of right angle, in right-angled trapezium
Annular groove is respectively equipped with right angle waist and bottom, the annular groove and annular seal groove on the lip-type packing bottom
Annular boss coordinate, the upper side wall of the right angle waist and annular seal groove of the right-angled trapezium coordinates, bottom in the right-angled trapezium
Side and piston rod coordinate.
2. a kind of hydraulic cylinder new type sealing device as claimed in claim 1, it is characterised in that：Go back in the annular seal groove
It is provided with ladder-shaped sealing ring, the vertical section of the ladder-shaped sealing ring is ladder structure of right angle, the right angle waist of the ladder structure of right angle
Coordinate with annular seal groove lower wall, the oblique angle waist of the oblique angle waist of the ladder structure of right angle and the lip-type packing coordinates.
3. a kind of hydraulic cylinder new type sealing device as claimed in claim 2, it is characterised in that：The ladder-shaped sealing ring and described
Annular seal groove adopts interference fits.
4. a kind of hydraulic cylinder new type sealing device as claimed in claim 1, it is characterised in that：The lip-type packing bottom
On annular groove side wall and diapire between be provided with chamfering.
5. a kind of hydraulic cylinder new type sealing device as claimed in claim 1, it is characterised in that：The cylinder body and piston rod it
Between be additionally provided with dust-proof sealing structure, stretch out along piston rod that to be arranged in order on cylinder body direction be seal and back-up ring, lip packing knot
Structure, dust-proof sealing structure.
6. a kind of hydraulic cylinder new type sealing device as claimed in claim 5, it is characterised in that：The dust-proof sealing structure is arranged
Cylinder body port is stretched out in piston rod.
7. a kind of hydraulic cylinder new type sealing device as claimed in claim 5, it is characterised in that：The dust-proof sealing structure is by ring
Shape dust seal groove and dust-proof seal ring composition, the annular dust seal trench bottom are provided with annular boss, the dust seal
Circle upper surface and lateral surface are respectively equipped with annular groove, the annular groove of the dust-proof seal ring lateral surface and annular dust seal
The annular boss of trench bottom coordinates, and the dust-proof seal ring upper surface and annular dust seal groove upper side wall coordinate.
8. a kind of hydraulic cylinder new type sealing device as claimed in claim 7, it is characterised in that：The dust-proof seal ring and piston
The medial surface that bar coordinates is provided with the circular arc for caving inward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510709206.6A CN105221512B (en) | 2015-10-28 | 2015-10-28 | A kind of hydraulic cylinder new type sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510709206.6A CN105221512B (en) | 2015-10-28 | 2015-10-28 | A kind of hydraulic cylinder new type sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221512A CN105221512A (en) | 2016-01-06 |
| CN105221512B true CN105221512B (en) | 2017-03-15 |
Family
ID=54990689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510709206.6A Expired - Fee Related CN105221512B (en) | 2015-10-28 | 2015-10-28 | A kind of hydraulic cylinder new type sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105221512B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630860A (en) * | 2016-07-18 | 2018-01-26 | 丹阳市飞利健身器材有限公司 | A kind of aluminium rolls up processing cold-rolling mill two way seal roller cylinder structure |
| CN111577915A (en) * | 2020-05-18 | 2020-08-25 | 中国科学院微电子研究所 | Isolation valve and semiconductor manufacturing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2292936A1 (en) * | 2009-09-04 | 2011-03-09 | Kolben-Seeger GmbH & Co. KG Pneumatik und Hydraulik | Pneumatic cylinder |
| CN202250293U (en) * | 2011-07-29 | 2012-05-30 | 重庆长安汽车股份有限公司 | Plane sealing ring |
| CN203309116U (en) * | 2013-06-08 | 2013-11-27 | 南京福碧源环境技术有限公司 | Reinforced seal ring |
| CN204692297U (en) * | 2015-06-09 | 2015-10-07 | 上海龙胜实业有限公司 | For the non-metallic gasket sealed |
| CN205277967U (en) * | 2015-10-28 | 2016-06-01 | 南京工程学院 | Novel sealing device of pneumatic cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202013001260U1 (en) * | 2013-02-12 | 2014-05-14 | Bümach Engineering International B.V. | Working cylinder with pressure medium overflow |
-
2015
- 2015-10-28 CN CN201510709206.6A patent/CN105221512B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2292936A1 (en) * | 2009-09-04 | 2011-03-09 | Kolben-Seeger GmbH & Co. KG Pneumatik und Hydraulik | Pneumatic cylinder |
| CN202250293U (en) * | 2011-07-29 | 2012-05-30 | 重庆长安汽车股份有限公司 | Plane sealing ring |
| CN203309116U (en) * | 2013-06-08 | 2013-11-27 | 南京福碧源环境技术有限公司 | Reinforced seal ring |
| CN204692297U (en) * | 2015-06-09 | 2015-10-07 | 上海龙胜实业有限公司 | For the non-metallic gasket sealed |
| CN205277967U (en) * | 2015-10-28 | 2016-06-01 | 南京工程学院 | Novel sealing device of pneumatic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105221512A (en) | 2016-01-06 |
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Granted publication date: 20170315 Termination date: 20211028 |
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| CF01 | Termination of patent right due to non-payment of annual fee |