CN105221512A - A kind of oil hydraulic cylinder new type sealing device - Google Patents
A kind of oil hydraulic cylinder new type sealing device Download PDFInfo
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- CN105221512A CN105221512A CN201510709206.6A CN201510709206A CN105221512A CN 105221512 A CN105221512 A CN 105221512A CN 201510709206 A CN201510709206 A CN 201510709206A CN 105221512 A CN105221512 A CN 105221512A
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Abstract
A kind of oil hydraulic cylinder new type sealing device, comprise cylinder body, piston rod, Sealing and back-up ring, also comprise lip seal coil structures, described lip seal coil structures is made up of annular seal groove and lip-type packing, described annular seal groove vertical section is rectangle, bottom is with annular boss, the vertical section of described lip-type packing is ladder structure of right angle, the right angle waist and bottom of right-angled trapezium are respectively equipped with annular groove, the annular boss of the annular groove on described lip-type packing bottom and annular seal groove coordinates, the right angle waist of described right-angled trapezium and the upper side wall of annular seal groove coordinate, in described right-angled trapezium, base and piston rod coordinate.Lip-type packing has better sealing effect than one side seal ring; Ladder-shaped sealing ring can not only reach sealing effect, also produces squeezing action to lip-type packing, increases sealability further; Dust-proof seal ring uses the seal ring life-span longer; It is convenient that sealing device is installed, compact structure, rationally.
Description
Technical field
The invention relates to a kind of oil hydraulic cylinder new type sealing device, belongs to technical field of sealing technology.
Background technique
Oil hydraulic cylinder is used in bender or cut-off machine work, all can affect the problem of its operating accuracy.Existing hydraulic cylinder sealing continues to use the rubber seal of multiple types always, reaches sealing effect by cushion rubber natural resiliency, and the shortcoming of this kind of sealing wears no resistance, and easy aging distortion, thus its poor sealing performance, working life is low.Owing to considering the larger and frequent back and forth movement of piston rod of working pressure, designing, mounting sealing device time, can avoid using traditional seal ring, improve its sealing effect.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is to provide a kind of oil hydraulic cylinder new type sealing device, not only novel in design, rational in infrastructure, uses, easy for installation, performance safety reliable, and can effectively improve and keep the sealability of oil hydraulic cylinder.
For achieving the above object, the invention is realized by following technological means:
A kind of oil hydraulic cylinder new type sealing device, comprise cylinder body, piston rod, Sealing and back-up ring, it is characterized in that: also comprise lip seal coil structures, described lip seal coil structures is made up of annular seal groove and lip-type packing, described annular seal groove vertical section is rectangle, bottom is with annular boss, the vertical section of described lip-type packing is ladder structure of right angle, the right angle waist and bottom of right-angled trapezium are respectively equipped with annular groove, the annular boss of the annular groove on described lip-type packing bottom and annular seal groove coordinates, the right angle waist of described right-angled trapezium and the upper side wall of annular seal groove coordinate, in described right-angled trapezium, base and piston rod coordinate.
Further:
Also ladder-shaped sealing ring is provided with in described annular seal groove, the vertical section of described ladder-shaped sealing ring is ladder structure of right angle, the right angle waist of described ladder structure of right angle and annular seal groove lower wall coordinate, and the oblique angle waist of described ladder structure of right angle and the oblique angle waist of described lip-type packing coordinate.
Described ladder-shaped sealing ring and described annular seal groove adopt transition fit.
Chamfering is provided with between the sidewall of the annular groove on described lip-type packing bottom and diapire.
Between described cylinder body and piston rod, be also provided with dust-proof sealing structure, stretch out on cylinder body direction along piston rod and be arranged in order as Sealing and back-up ring, lip seal configuration, dust-proof sealing structure.
Described dust-proof sealing structure is arranged on piston rod and stretches out cylinder body port.
Described dust-proof sealing structure is made up of annular dust sealing groove and dust-proof seal ring, described annular dust sealing groove bottom is provided with annular boss, described dust-proof seal ring upper surface and outer side surface are respectively equipped with annular groove, the annular groove of described dust-proof seal ring outer side surface coordinates with the annular boss of annular dust sealing groove bottom, and described dust-proof seal ring upper surface and annular dust sealing groove upper side wall coordinate.
The inner side surface that described dust-proof seal ring and piston rod coordinate is provided with the circular arc caved inward.
The beneficial effect of the invention is: lip-type packing has better sealing effect than seal ring; Ladder-shaped sealing ring can not only reach sealing effect, also produces squeezing action to lip-type packing, increases sealability further; Dust-proof seal ring uses the seal ring life-span longer; It is convenient that sealing device is installed, compact structure, rationally.
Accompanying drawing explanation
Fig. 1 is this innovation and creation sectional view;
Fig. 2 is lip-type packing structural representation;
Fig. 3 is annular seal groove, annular dust sealing groove structural representation;
Fig. 4 is dust-proof seal ring structural representation.
Embodiment
Below in conjunction with Figure of description, the invention is further described.
A kind of oil hydraulic cylinder new type sealing device, comprise cylinder body 2, piston rod 1, Sealing 3 and back-up ring 4, it is characterized in that: also comprise lip seal coil structures, described lip seal coil structures is made up of annular seal groove 8 and lip-type packing 5, described annular seal groove 8 vertical section is rectangle, bottom is with annular boss 801, the vertical section of described lip-type packing 5 is ladder structure of right angle, the right angle waist and bottom of right-angled trapezium are respectively equipped with annular groove 501, 502, annular groove 502 on described lip-type packing 5 bottom and the annular boss 801 of annular seal groove 8 coordinate, the right angle waist of described right-angled trapezium and the upper side wall of annular seal groove 8 coordinate, in described right-angled trapezium, base and piston rod 1 coordinate.
The sealing of the annular groove 502 on lip-type packing 5 bottom and the annular boss 801 of annular seal groove, as a kind of reinforcement sealing structure, if effusion force feed phenomenon occurs for Sealing 3 and back-up ring 4, can play guarantee seal action; And the annular groove 501 of right-angled trapezium right angle waist can deposit the hydraulic oil leaked down, and along with the pressure of hydraulic oil, the annular groove 501 of right-angled trapezium right angle waist expands outwardly, and lip-type packing 5 is tightly fitted, further enhanced leaktightness effect with cylinder body 2.
Further:
Ladder-shaped sealing ring 6 is also provided with in described annular seal groove, the vertical section of described ladder-shaped sealing ring 6 is ladder structure of right angle, the right angle waist of described ladder structure of right angle and annular seal groove sidewall coordinate, and the oblique angle waist of described ladder structure of right angle and the oblique angle waist of described lip-type packing coordinate.
Described ladder-shaped sealing ring 6 and adopt transition fit at described annular seal groove 8.
Lip-type packing 5 is subject to the extruding of ladder-shaped sealing ring 6 transition fit, can improve the sealing effect of lip-type packing 5 further, and ladder-shaped sealing ring 6 also has the effect of back-up ring concurrently simultaneously.
Chamfering 503 is provided with between the sidewall of the annular groove 502 on described lip-type packing 5 bottom and diapire.
The effect of rounding 503 can reduce lip-type packing 5 distortion at work, lowers the fatigue damage of work, improves sealing effect, is also conducive to installing.
Between described cylinder body and piston rod, be also provided with dust-proof sealing structure, stretch out on cylinder body direction along piston rod and be arranged in order as Sealing 3 and back-up ring 4, lip seal configuration, dust-proof sealing structure.
Described dust-proof sealing structure is arranged on piston rod 1 and stretches out cylinder body 2 port.
Described dust-proof sealing structure is made up of annular dust sealing groove 9 and dust-proof seal ring 7, annular boss 901 is provided with bottom described annular dust sealing groove 9, described dust-proof seal ring 7 upper surface and outer side surface are respectively equipped with annular groove 701,702, the annular groove 702 of described dust-proof seal ring 7 outer side surface coordinates with the annular boss 901 of annular dust sealing groove bottom, and described dust-proof seal ring 7 upper surface and annular dust sealing groove 9 upper side wall coordinate.
The inner side surface that described dust-proof seal ring 7 and piston rod coordinate is provided with the circular arc 703 caved inward.
The sunken inside of described dust-proof seal ring is circular arc effect is that concentrate on the upper and lower two ends of sunken inside with plunger rod contacts pressure, can play the effect of " scraper plate " so better, dust sealing performance is greatly improved.
More than show and describe the basic principle of the invention, major character and advantage.The technician of the industry should understand; the design is not restricted to the described embodiments; the principle that the design is just described described in above-described embodiment and specification; under the prerequisite not departing from the design's spirit and scope; the invention also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the design.The claimed scope of the invention is defined by appending claims and equivalent thereof.
Claims (8)
1. an oil hydraulic cylinder new type sealing device, comprise cylinder body, piston rod, Sealing and back-up ring, it is characterized in that: also comprise lip seal coil structures, described lip seal coil structures is made up of annular seal groove and lip-type packing, described annular seal groove vertical section is rectangle, bottom is with annular boss, the vertical section of described lip-type packing is ladder structure of right angle, the right angle waist and bottom of right-angled trapezium are respectively equipped with annular groove, the annular boss of the annular groove on described lip-type packing bottom and annular seal groove coordinates, the right angle waist of described right-angled trapezium and the upper side wall of annular seal groove coordinate, in described right-angled trapezium, base and piston rod coordinate.
2. a kind of oil hydraulic cylinder new type sealing device as claimed in claim 1, it is characterized in that: in described annular seal groove, be also provided with ladder-shaped sealing ring, the vertical section of described ladder-shaped sealing ring is ladder structure of right angle, the right angle waist of described ladder structure of right angle and annular seal groove lower wall coordinate, and the oblique angle waist of described ladder structure of right angle and the oblique angle waist of described lip-type packing coordinate.
3. a kind of oil hydraulic cylinder new type sealing device as claimed in claim 2, is characterized in that: described ladder-shaped sealing ring and described annular seal groove adopt transition fit.
4. a kind of oil hydraulic cylinder new type sealing device as claimed in claim 1, is characterized in that: be provided with chamfering between the sidewall of the annular groove on described lip-type packing bottom and diapire.
5. a kind of oil hydraulic cylinder new type sealing device as claimed in claim 1, it is characterized in that: between described cylinder body and piston rod, be also provided with dust-proof sealing structure, stretch out on cylinder body direction along piston rod and be arranged in order as Sealing and back-up ring, lip seal configuration, dust-proof sealing structure.
6. a kind of oil hydraulic cylinder new type sealing device as claimed in claim 5, is characterized in that: described dust-proof sealing structure is arranged on piston rod and stretches out cylinder body port.
7. a kind of oil hydraulic cylinder new type sealing device as claimed in claim 5, it is characterized in that: described dust-proof sealing structure is made up of annular dust sealing groove and dust-proof seal ring, described annular dust sealing groove bottom is provided with annular boss, described dust-proof seal ring upper surface and outer side surface are respectively equipped with annular groove, the annular groove of described dust-proof seal ring outer side surface coordinates with the annular boss of annular dust sealing groove bottom, and described dust-proof seal ring upper surface and annular dust sealing groove upper side wall coordinate.
8. a kind of oil hydraulic cylinder new type sealing device as claimed in claim 1, is characterized in that: the inner side surface that described dust-proof seal ring and piston rod coordinate is provided with the circular arc caved 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 true CN105221512A (en) | 2016-01-06 |
| CN105221512B CN105221512B (en) | 2017-03-15 |
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| 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 |
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| Country | Link |
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| CN (1) | CN105221512B (en) |
Cited By (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 (6)
| 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 |
| WO2014124624A1 (en) * | 2013-02-12 | 2014-08-21 | Bümach Engineering International B.V. | Working cylinder having pressure medium flow transfer |
| 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 |
-
2015
- 2015-10-28 CN CN201510709206.6A patent/CN105221512B/en not_active Expired - Fee Related
Patent Citations (6)
| 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 |
| WO2014124624A1 (en) * | 2013-02-12 | 2014-08-21 | Bümach Engineering International B.V. | Working cylinder having pressure medium flow transfer |
| 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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105221512B (en) | 2017-03-15 |
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Granted publication date: 20170315 Termination date: 20211028 |