CN201723713U - Sealing device for hydraulic cylinder - Google Patents
Sealing device for hydraulic cylinder Download PDFInfo
- Publication number
- CN201723713U CN201723713U CN2009202740626U CN200920274062U CN201723713U CN 201723713 U CN201723713 U CN 201723713U CN 2009202740626 U CN2009202740626 U CN 2009202740626U CN 200920274062 U CN200920274062 U CN 200920274062U CN 201723713 U CN201723713 U CN 201723713U
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- ring
- piston
- cylinder body
- seal
- seal ring
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Abstract
The utility model discloses a sealing device, in particular to a sealing device for a hydraulic cylinder. The sealing device is characterized in that an upper step and a lower step are respectively arranged at the outer sides at the upper end and the lower end of a piston, an upper piston seal ring and a lower piston seal ring are respectively arranged on the upper step and the lower step, piston rings are respectively arranged at the outer sides of the upper piston seal ring and the lower piston seal ring, an upper piston seal ring pressing ring is arranged above the upper piston seal ring, a lower piston seal ring pressing ring is arranged below the lower piston seal ring, an upper piston closing ring is arranged on a hydraulic stem above the upper piston seal ring pressing ring, and lower piston closing ring is arranged on a hydraulic stem below the lower piston seal ring pressing ring. The sealing device has the advantages that the piston rings are provided with openings, the seal ring laterally expands to promote the piston rings to expand under pressure, and the piston rings are closely contacted with a cylinder body and the hydraulic stem under pressure; at least two piston rings are arranged, and the openings are mutually staggered to effectively prevent fuel leakage.
Description
Technical field
The utility model relates to a kind of seal arrangement, especially a kind of seal arrangement of oil hydraulic cylinder.
Background technique
During hydraulic cylinder works, piston is back and forth movement in oil hydraulic cylinder, hydraulic pressure can be converted into mechanical energy, but oil hydraulic cylinder of the prior art, owing to technology such as having the sealing difference in the cylinder causes oil hydraulic cylinder to have leakage problem, its internal leakage will cause the decrease in efficiency of cylinder, creep, grind phenomenons such as wound, its external leakage will bring environmental pollution, cause technical problems such as hidden danger, and domestic Sealing mostly is the rubber of different shape or the seal ring of polyurethane material, its sealing mechanism is all the same basically, leakage problems exists always, and external building rubber compound seal ring is because superior materials, require auxiliary equipment machining accuracy height, embody certain superiority on working life, but do not break through on the sealing mechanism, sealing effect is not very good yet, and cost an arm and a leg, be very restricted in the described use.
The model utility content
Technical problem to be solved in the utility model provides a kind of can effectively preventing and leaks the seal arrangement of a kind of oil hydraulic cylinder of long service life.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of seal arrangement of oil hydraulic cylinder, comprise cylinder body, the cylinder body lid, hydraulic rod, piston, the hydraulic pressure oilhole, the end of described hydraulic rod in described cylinder body is provided with described piston, it is characterized in that described piston is respectively arranged with step in the outside at two ends up and down, be respectively arranged with upper piston seal circle and lower piston seal ring on the described step, described upper piston seal circle and described lower piston seal ring are the air bag circle of sealing, the described upper piston seal circle and the described lower piston seal ring outside are respectively arranged with piston ring, the top of described upper piston seal circle trim ring is provided with upper piston seal circle trim ring, the below of described lower piston seal ring trim ring is provided with lower piston seal ring trim ring, the external diameter of described upper piston seal circle trim ring and described lower piston seal ring trim ring is slightly down in the internal diameter of described cylinder body, the described hydraulic rod in top of described upper piston seal circle trim ring is provided with positioning ring, the described hydraulic rod in below of described lower piston seal ring trim ring is provided with down positioning ring, described piston and described piston positioning ring and described hydraulic rod are by being threaded, the top of described upper piston seal circle trim ring on being provided with on the described hydraulic rod positioning ring external diameter less than the external diameter of described upper piston seal circle trim ring, greater than its internal diameter, the following positioning ring external diameter that the below of described lower piston seal ring trim ring is provided with on described hydraulic rod is less than the external diameter of described lower piston seal ring trim ring, greater than its internal diameter, described upward seal ring trim ring and described going up between the positioning ring under stress have the space, between described lower seal trim ring and the described following positioning ring space is arranged under stress, described cylinder body two ends up and down is respectively arranged with upper cylinder body lid and lower cylinder body lid, the junction of described cylinder body and cylinder body lid is provided with seal ring, described hydraulic rod passes described lower cylinder body lid, the junction that described lower cylinder body covers in cylinder body with hydraulic rod is provided with a cavity, described cavity place is provided with cylinder body lid seal ring, described cylinder body lid seal ring is the air bag circle of sealing, described cylinder body lid seal ring inboard is provided with piston ring, described upper piston seal circle, the inboard of the outside of described lower piston seal ring and described cylinder body lid seal ring is provided with groove, described piston ring is arranged in the described groove, described piston ring is provided with two at least, described two piston rings are up and down to be arranged, described piston ring is provided with opening, the opening of described piston ring staggers mutually, the groove of described seal ring is provided with a protruding block in described gap-clearance of piston rings place, the height of described protruding block is no more than the height of described piston ring, the external diameter of described seal ring is less than the external diameter of described piston ring, described piston ring is polytetrafluoroethylmaterial material or metallic material, described cylinder body lid seal ring top is provided with cylinder body lid seal ring trim ring, described cylinder body lid seal ring trim ring top is provided with cylinder body lid positioning ring, described cylinder body lid positioning ring and described cylinder body are by being threaded, the inner diameter of described cylinder body lid positioning ring is greater than the inner diameter of described cylinder body lid seal ring trim ring, less than its external diameter, between described cylinder body lid positioning ring and the described cylinder body lid seal ring trim ring space is arranged under stress, described seal ring is set to elastic material, and described elastic material is polyurethane material or rubber material.
Compared with prior art, the utility model has the advantages that in the groove of inboard of the outside of upper piston seal circle, lower piston seal ring and cylinder body lid seal ring and be provided with piston ring, and the external diameter of piston ring is greater than the external diameter of seal ring, seal ring can not contacted with oil hydraulic cylinder, can effectively reduce friction; Piston ring is provided with opening, upper piston seal circle and lower piston seal ring lateral expansion under pressure impels the piston ring expansion, piston ring closely contacts under pressure with cylinder body, and cylinder body lid seal ring lateral expansion under pressure impels the piston ring expansion, and piston ring closely contacts under pressure with hydraulic rod; Piston ring is provided with two at least, and opening staggers mutually, can prevent leakage of oil effectively; Piston ring is polytetrafluoroethylmaterial material or metallic material, and polytetrafluoroethylmaterial material and metallic material lubricity are better, can reduce friction effectively; The groove of seal ring is provided with a protruding block in gap-clearance of piston rings place, and the position of energy limited piston ring prevents the displacement of piston ring circumferencial direction; Elastic seal ring inside is set to air bag, under pressure the recovery of air faster, elasticity is better, effectively plays seal action; The hydraulic cylinder sealing circle and does not have crack between the hydraulic rod under the situation that is not subjected to external force, prevent that hydraulic oil from leaking outside; The seal ring trim ring has guaranteed seal ring lateral spread under pressure condition to a certain extent, has played better seal action; And the external diameter of seal ring trim ring is slightly less than the internal diameter of cylinder body, and the seal ring trim ring can not contacted with cylinder body; Hydraulic rod and hydraulic pressure lid junction also are provided with elastic seal ring, have effectively prevented leaking outside of hydraulic oil, the protection environment; Positioning ring can play the effect of restriction seal ring trim ring position in the piston up-down process; The diameter of positioning ring greater than its inner diameter, can enter hydraulic oil less than the outer diameter of seal ring trim ring fast, can produce pressure to seal ring apace; Piston and piston positioning ring and hydraulic rod make the dismounting of seal ring and seal ring trim ring more convenient by being threaded; Cylinder body lid positioning ring and cylinder body make the seal arrangement convenient disassembly of whole oil hydraulic cylinder by being threaded; The sealing device structure of whole oil hydraulic cylinder is reasonable, and is practical, can keep long-time ne-leakage, long service life.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of piston ring of the present utility model and seal ring.
The title of above accompanying drawing and sequence number: 1, cylinder body, 3, hydraulic rod, 4, piston, 5, hydraulic pressure oilhole, 6, the upper piston seal circle, 7, the lower piston seal ring, 8, upper piston seal circle trim ring, 9, lower piston seal ring trim ring, 10, the upper piston positioning ring, 11, lower piston positioning ring, 12, upper cylinder body lid, 13, the lower cylinder body lid, 14, cylinder body lid seal ring, 15, cylinder body lid seal ring trim ring, 16, cylinder body lid positioning ring, 17, piston ring.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in the figure: a kind of seal arrangement of oil hydraulic cylinder, comprise cylinder body 1, the cylinder body lid, hydraulic rod 3, piston 4, hydraulic pressure oilhole 5, upper cylinder body lid 12 is fixing by seal ring and cylinder body 1 with lower cylinder body lid 13, during work, when hydraulic oil when last hydraulic pressure oilhole enters cylinder body 1, upper piston seal circle trim ring 8 is subjected to the extruding force of hydraulic oil, upper piston seal circle 6 is produced squeezing action, the lateral expansion of upper piston seal circle 6 under pressure causes the expansion of piston ring 17, play good seal action, the position that while lower piston positioning ring 11 can limit lower piston seal ring trim ring 9 can not glide it significantly; When hydraulic oil enters cylinder body 1 from descending the hydraulic pressure oilhole, lower piston seal ring trim ring 9 is subjected to the extruding force of hydraulic oil, lower piston seal ring 7 is produced squeezing action, the lateral expansion of lower piston seal ring 7 under pressure makes the expansion of piston ring 17, play good seal action, the position that while upper piston positioning ring 10 can limit upper piston seal circle trim ring 8; Cylinder body lid seal ring trim ring 15 is subjected to the hydraulic oil extruding, and cylinder body lid seal ring 14 is produced downforce, and cylinder body lid seal ring 14 lateral expansions cause the expansion of piston ring 17, play seal action, prevent that hydraulic oil from leaking outside.
Claims (10)
1. the seal arrangement of an oil hydraulic cylinder, comprise cylinder body, the cylinder body lid, hydraulic rod, piston, the hydraulic pressure oilhole, the end of described hydraulic rod in described cylinder body is provided with described piston, it is characterized in that described piston is respectively arranged with step in the outside at two ends up and down, be respectively arranged with upper piston seal circle and lower piston seal ring on the described step, the described upper piston seal circle and the described lower piston seal ring outside are respectively arranged with piston ring, described upper piston seal circle top is provided with upper piston seal circle trim ring, the below of described lower piston seal ring is provided with lower piston seal ring trim ring, the described hydraulic rod in top of described upper piston seal circle trim ring is provided with positioning ring, the described hydraulic rod in below of described lower piston seal ring trim ring is provided with down positioning ring, described cylinder body two ends up and down is respectively arranged with upper cylinder body lid and lower cylinder body lid, described hydraulic rod passes described lower cylinder body lid, the junction that described lower cylinder body covers in cylinder body with hydraulic rod is provided with a cavity, described cavity place is provided with cylinder body lid seal ring, described cylinder body lid seal ring inboard is provided with piston ring, described cylinder body lid seal ring top is provided with cylinder body lid seal ring trim ring, and described cylinder body lid seal ring trim ring top is provided with positioning ring.
2. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1, it is characterized in that described upper piston seal circle, the described lower piston seal ring outside and described cylinder body lid seal ring inboard are provided with groove, described piston ring is arranged in the described groove, described piston ring is provided with two at least, described two piston rings are up and down to be arranged, described piston ring is provided with opening, the opening of described two piston rings staggers mutually, the groove of described seal ring is provided with a protruding block in described gap-clearance of piston rings place, the height of described protruding block is no more than the height of described piston ring, and the external diameter of described seal ring is less than the external diameter of described piston ring.
3. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described piston ring is polytetrafluoroethylmaterial material or metallic material.
4. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1, the top that it is characterized in that described upper piston seal circle trim ring on being provided with on the described hydraulic rod positioning ring external diameter less than the external diameter of described upper piston seal circle trim ring, greater than its internal diameter, the following positioning ring external diameter that the below of described lower piston seal ring trim ring is provided with on described hydraulic rod is less than the external diameter of the described seal ring trim ring of living down, greater than its internal diameter, the inner diameter of described cylinder body lid positioning ring is greater than the inner diameter of described cylinder body lid seal ring trim ring, less than its external diameter.
5. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1, it is characterized in that described upward seal ring trim ring and described going up between the positioning ring under stress have the space, between described lower seal trim ring and the described following positioning ring space is arranged under stress, between described cylinder body lid seal ring trim ring and the described cylinder body lid positioning ring space is arranged under stress.
6. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that the external diameter of described upper piston seal circle trim ring and described lower piston seal ring trim ring is slightly less than the internal diameter of described cylinder body.
7. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described piston and described piston positioning ring and described hydraulic rod by being threaded, and described cylinder body lid positioning ring and described cylinder body are by being threaded.
8. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that the junction of described cylinder body and cylinder body lid is provided with seal ring.
9. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described upper piston seal circle, described lower piston seal ring and the cylinder body lid seal ring air bag circle for sealing.
10. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described seal ring is set to elastic material, and described elastic material is polyurethane material or rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202740626U CN201723713U (en) | 2009-11-27 | 2009-11-27 | Sealing device for hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202740626U CN201723713U (en) | 2009-11-27 | 2009-11-27 | Sealing device for hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201723713U true CN201723713U (en) | 2011-01-26 |
Family
ID=43492039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202740626U Expired - Fee Related CN201723713U (en) | 2009-11-27 | 2009-11-27 | Sealing device for hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201723713U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573548A (en) * | 2012-07-25 | 2014-02-12 | 宁波市镇海捷登应用技术研究所 | Hydraulic device for raising water level by using tidal energy |
| CN106567988A (en) * | 2015-10-12 | 2017-04-19 | 金华市婺城区晓晔机械设备厂 | Butter filler capable of automatically fixing quantity |
| CN108488379A (en) * | 2018-05-03 | 2018-09-04 | 中国兵器装备研究院 | A kind of 3D printing equipment cylinder body sealing device |
| CN110793196A (en) * | 2019-10-30 | 2020-02-14 | 广西电网有限责任公司电力科学研究院 | Heating device of current transformer |
| CN111775157A (en) * | 2019-04-03 | 2020-10-16 | 沈阳新松机器人自动化股份有限公司 | Rotary lifting mechanism of horizontal joint robot |
| CN112886498A (en) * | 2021-03-26 | 2021-06-01 | 韩彩平 | Cable pipe orifice plugging device |
-
2009
- 2009-11-27 CN CN2009202740626U patent/CN201723713U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573548A (en) * | 2012-07-25 | 2014-02-12 | 宁波市镇海捷登应用技术研究所 | Hydraulic device for raising water level by using tidal energy |
| CN106567988A (en) * | 2015-10-12 | 2017-04-19 | 金华市婺城区晓晔机械设备厂 | Butter filler capable of automatically fixing quantity |
| CN108488379A (en) * | 2018-05-03 | 2018-09-04 | 中国兵器装备研究院 | A kind of 3D printing equipment cylinder body sealing device |
| CN108488379B (en) * | 2018-05-03 | 2023-06-20 | 中国兵器装备研究院 | Cylinder body sealing device of 3D printing equipment |
| CN111775157A (en) * | 2019-04-03 | 2020-10-16 | 沈阳新松机器人自动化股份有限公司 | Rotary lifting mechanism of horizontal joint robot |
| CN111775157B (en) * | 2019-04-03 | 2022-08-02 | 沈阳新松机器人自动化股份有限公司 | Rotary lifting mechanism of horizontal joint robot |
| CN110793196A (en) * | 2019-10-30 | 2020-02-14 | 广西电网有限责任公司电力科学研究院 | Heating device of current transformer |
| CN112886498A (en) * | 2021-03-26 | 2021-06-01 | 韩彩平 | Cable pipe orifice plugging device |
| CN112886498B (en) * | 2021-03-26 | 2022-07-15 | 国网福建省电力有限公司尤溪县供电公司 | Cable pipe orifice plugging device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Chen Zhaohong Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20121127 |