CN203641515U - Hydraulic cylinder piston rod seal structure - Google Patents
Hydraulic cylinder piston rod seal structure Download PDFInfo
- Publication number
- CN203641515U CN203641515U CN201420026348.3U CN201420026348U CN203641515U CN 203641515 U CN203641515 U CN 203641515U CN 201420026348 U CN201420026348 U CN 201420026348U CN 203641515 U CN203641515 U CN 203641515U
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- China
- Prior art keywords
- seal
- piston rod
- ring
- hydraulic cylinder
- guide sleeve
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- Expired - Fee Related
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Abstract
The utility model discloses a hydraulic cylinder piston rod seal structure comprising a piston rod, a guide sleeve, and a seal arranged between the piston rod and the guide sleeve. The seal between the guide sleeve and the piston rod comprises a dustproof ring, a combined seal ring, a step seal and a support ring. The inner wall of the guide sleeve is provided with a seal groove. The dustproof ring, the combined seal ring, the step seal, and the support ring are disposed in the seal groove of the guide sleeve to form effective sealing for the piston rod. The combined seal ring and the step seal coordinately serve as the main seal; good oil return performance of the step seal ensures no back pressure of the seal during normal operation, and sealing effect is good. Meanwhile, the combined seal ring is a combined seal of a lip seal and an O-shaped ring; the combined seal ring has high elasticity in the O-shaped ring and wear resistance in the lip seal, no oil sticks and no leakage occurs to a hydraulic cylinder when the hydraulic cylinder bears no load and the piston rod is inverted, and the effective sealing is achieved for the hydraulic cylinder piston rod.
Description
Technical field
The utility model relates to a kind of sealing configuration of oil hydraulic cylinder, is specifically related to a kind of movable sealing structure for hydraulic cylinder piston rod place.
Background technique
Along with the extensive use of hydraulic system, the performance of oil hydraulic cylinder is had higher requirement, especially the movement speed of oil hydraulic cylinder to be had higher requirement, the requirement of the sealing of the piston rod to oil hydraulic cylinder and end cap cooperation place is also just more strict.
The piston rod of oil hydraulic cylinder and the sealing means of end cap cooperation place are take combined labyrinth and carbon gland as main at present, but, because combined labyrinth and carbon gland need to arrange multiple-sealed circle on piston rod, be generally four roads or five roads, this has just increased the area of contact of Sealing and piston rod, and because the decrement of the Sealing of combined labyrinth and carbon gland is generally larger, thereby cause the frictional force between Sealing and piston rod larger, and for high speed hydraulic cylinder, larger frictional force not only causes the breakout pressure of oil hydraulic cylinder larger, and cause low-response, have a strong impact on the dynamic performance of oil hydraulic cylinder.In addition, for the oil hydraulic cylinder of piston rod in inversion state when the no-load, the piston rod seal of existing most of oil hydraulic cylinder is at no-load, and when piston rod is inverted, piston rod cylindrical is easily hung oil, and oil hydraulic cylinder easily leaks.Hydraulic oil is hung oil, is leaked the service behaviour that can directly affect oil hydraulic cylinder, affects the normal use of machine.
Therefore, how, when the piston rod that guarantees oil hydraulic cylinder seals during at inversion state, can reduce friction is again the technical problem that current those skilled in the art need solution badly.
Model utility content
The utility model object is to provide a kind of Cylinder Rod Sealing on Hydraulic Cylinder structure for above-mentioned technical problem, can back pressure between Sealing while guaranteeing normal work, and sealing effect is good while using; Meanwhile, guarantee that oil hydraulic cylinder is at no-load, in piston rod inversion situation, oil hydraulic cylinder also has good sealing effect, can not produce and hang oil, leakage phenomenon.
The utility model solve the technical problem adopted technological scheme: a kind of Cylinder Rod Sealing on Hydraulic Cylinder structure, comprise the sealing between piston rod, guide sleeve, piston rod and guide sleeve, the sealing between described guide sleeve and piston rod comprises dust ring, combined seal ring, this special envelope and support ring; Described guide sleeve inwall offers seal groove, and described dust ring, combined seal ring, this special envelope, support ring are arranged in the seal groove of described guide sleeve, form the effective sealing to described piston rod.
The combination seal that described combined seal ring is made up of lip seal and O type circle, there is high elasticity and the lip seal material wear ability of O type circle, O type circle has guaranteed the pre compressed magnitude of seal lip under load-less condition, and the variation of this sealing and temperature is irrelevant, guarantee that hydraulic cylinder piston rod there will not be and hangs oil in the time of inversion, no load state.
Described support rascal is drawn together the first support ring and the second support ring, and described this special envelope is provided with between described the first support ring and the second support ring.
The utility model adopts combined seal ring and Si Te envelope to coordinate as primary seal, and this special envelope has good oil return to be made can not produce back pressure between Sealing, and combined seal ring and Si Te envelope all can be high pressure resistant, and when operating mode, sealing effect is good.In the time of hydraulic cylinder piston rod inversion, no load state, combined seal ring guarantees that hydraulic cylinder piston rod there will not be extension oil.
The utility model adopts combined seal ring and Si Te envelope to coordinate as primary seal, can back pressure between Sealing when the good oil return of this special envelope has guaranteed normal work, and sealing effect is good.Simultaneously, combined seal ring is the combination seal of lip seal and O type circle, it is with the advantage of high elasticity and the lip seal material wear ability of O type circle, guarantee that oil hydraulic cylinder is at no-load, in piston rod inversion situation, can not produce and hang oil, oil hydraulic cylinder produces leakage phenomenon, and hydraulic cylinder piston rod has been formed to effective sealing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structure for amplifying schematic diagram at A place in Fig. 1.
In figure: 1. piston rod, 2. guide sleeve, 3. dust ring, 4. combined seal ring, 5. the first support ring, 6. this special envelope, 7. the second support ring, 8. contamination seal.
Embodiment
In order to be illustrated more clearly in the utility model embodiment's technological scheme, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
As shown in drawings, a kind of hydraulic cylinder piston rod 1 sealing configuration, comprise the sealing between piston rod 1, guide sleeve 2, cylinder body, piston rod 1 and guide sleeve 2, between piston rod 1 and guide sleeve 2, for being slidably connected, the sealing between guide sleeve 2 and piston rod 1 comprises dust ring 3, combined seal ring 4, the first support ring 5, this special envelope 6, the second support ring 7 and the contamination seal 8 that ecto-entad sets gradually; Guide sleeve 2 is copper sheathing, and guide sleeve 2 inwalls offer seal groove, and dust ring 3, combined seal ring 4, the first support ring 5, this special envelope 6, the second support ring 7 and contamination seal 8 are arranged in the seal groove of guide sleeve 2; Combined seal ring 4 and Si Te envelope 6 coordinate as primary seal, and this special envelope 6 has good oil return to be made can not produce back pressure between Sealing, and combined seal ring 4 and Si Te envelope 6 all can be high pressure resistant, and when operating mode, sealing effect is good; Combined seal ring 4 is the combination seals that are made up of lip seal and O type circle, combined seal ring 4 has advantages of high elasticity and the lip seal material wear ability of O type circle simultaneously, O type circle has guaranteed the pre compressed magnitude of seal lip under load-less condition, and the variation of this sealing and temperature is irrelevant, guarantee that hydraulic cylinder piston rod 1 there will not be extension oil under no-load inversion state, forms the effective sealing to piston rod 1.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a Cylinder Rod Sealing on Hydraulic Cylinder structure, is characterized in that: comprise the sealing between piston rod, guide sleeve, piston rod and guide sleeve, the sealing between described guide sleeve and piston rod comprises dust ring, combined seal ring, this special envelope and support ring; Described guide sleeve inwall offers seal groove, and described dust ring, combined seal ring, this special envelope, support ring are arranged in the seal groove of described guide sleeve, the combination seal that described combined seal ring is made up of lip seal and O type circle.
2. a kind of Cylinder Rod Sealing on Hydraulic Cylinder structure as claimed in claim 1, is characterized in that: described support rascal is drawn together the first support ring and the second support ring, and described this special envelope is provided with between described the first support ring and the second support ring.
3. a kind of Cylinder Rod Sealing on Hydraulic Cylinder structure as claimed in claim 2, is characterized in that: the second support ring rear side is also provided with contamination seal.
4. a kind of Cylinder Rod Sealing on Hydraulic Cylinder structure as claimed in claim 1, is characterized in that: described guide sleeve is copper sheathing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420026348.3U CN203641515U (en) | 2014-01-16 | 2014-01-16 | Hydraulic cylinder piston rod seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420026348.3U CN203641515U (en) | 2014-01-16 | 2014-01-16 | Hydraulic cylinder piston rod seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203641515U true CN203641515U (en) | 2014-06-11 |
Family
ID=50872760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420026348.3U Expired - Fee Related CN203641515U (en) | 2014-01-16 | 2014-01-16 | Hydraulic cylinder piston rod seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203641515U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791324A (en) * | 2015-04-16 | 2015-07-22 | 佛山市金凯地过滤设备有限公司 | Presser two-level type oil cylinder device |
| CN105298975A (en) * | 2015-10-12 | 2016-02-03 | 江苏恒立高压油缸股份有限公司 | Pillared shoe cylinder |
| CN107448607A (en) * | 2017-08-30 | 2017-12-08 | 武汉海王机电工程技术公司 | A kind of sealing structure of downhole tool experimental rig |
| CN108258829A (en) * | 2016-12-29 | 2018-07-06 | 中国石油天然气股份有限公司 | A kind of sand control piston for oil immersion line motor |
| CN109505971A (en) * | 2018-12-07 | 2019-03-22 | 上海上汽马瑞利动力总成有限公司 | A kind of improvement structure for selecting actuator leakage of putting into gear |
| CN112623202A (en) * | 2020-12-11 | 2021-04-09 | 哈尔滨飞机工业集团有限责任公司 | Lubricating support and sealing dustproof device for undercarriage buffer strut |
-
2014
- 2014-01-16 CN CN201420026348.3U patent/CN203641515U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791324A (en) * | 2015-04-16 | 2015-07-22 | 佛山市金凯地过滤设备有限公司 | Presser two-level type oil cylinder device |
| CN105298975A (en) * | 2015-10-12 | 2016-02-03 | 江苏恒立高压油缸股份有限公司 | Pillared shoe cylinder |
| CN108258829A (en) * | 2016-12-29 | 2018-07-06 | 中国石油天然气股份有限公司 | A kind of sand control piston for oil immersion line motor |
| CN107448607A (en) * | 2017-08-30 | 2017-12-08 | 武汉海王机电工程技术公司 | A kind of sealing structure of downhole tool experimental rig |
| CN109505971A (en) * | 2018-12-07 | 2019-03-22 | 上海上汽马瑞利动力总成有限公司 | A kind of improvement structure for selecting actuator leakage of putting into gear |
| CN112623202A (en) * | 2020-12-11 | 2021-04-09 | 哈尔滨飞机工业集团有限责任公司 | Lubricating support and sealing dustproof device for undercarriage buffer strut |
| CN112623202B (en) * | 2020-12-11 | 2023-06-23 | 哈尔滨飞机工业集团有限责任公司 | Landing gear buffer support column lubrication support and sealing dustproof device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20210116 |