CN109356900B - Oil-gas bidirectional sealing structure - Google Patents
Oil-gas bidirectional sealing structure Download PDFInfo
- Publication number
- CN109356900B CN109356900B CN201811399984.XA CN201811399984A CN109356900B CN 109356900 B CN109356900 B CN 109356900B CN 201811399984 A CN201811399984 A CN 201811399984A CN 109356900 B CN109356900 B CN 109356900B
- Authority
- CN
- China
- Prior art keywords
- sealing
- sealing ring
- lip
- main
- main sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 246
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 20
- 230000002146 bilateral effect Effects 0.000 claims abstract description 9
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- 229920001973 fluoroelastomer Polymers 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000000725 suspension Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 239000000306 component Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing Devices (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention discloses an oil-gas bidirectional sealing structure, which comprises a main sealing ring, wherein the main sealing ring is of a bilateral symmetry structure, a rectangular groove is formed in the middle of one side of the main sealing ring, which is in contact with a matching surface of an oil cylinder, a first elliptic groove is symmetrically formed at two ends of the other side of the main sealing ring, an auxiliary sealing ring is arranged in the rectangular groove, and the first sealing ring is filled in the first elliptic groove in an interference manner; the main sealing rings are symmetrically provided with main sealing lips on two sides of the rectangular groove, and the main sealing lips are contacted with the matching surface of the oil cylinder to form a multi-labyrinth sealing structure so as to realize bidirectional sealing. According to the invention, through the design of the main sealing ring and the auxiliary sealing ring, the left-right bidirectional sealing function can be satisfied, the flow of high-pressure oil liquid and gas is effectively cut off, and zero leakage is realized; through the design of main sealing ring and vice sealing ring bottom sealing washer, provide sufficient resilience force and reliable sealing performance for main sealing ring and vice sealing ring respectively, guarantee that seal structure has reliable sealing performance and lower frictional force, fatigue life is high.
Description
Technical Field
The invention relates to the field of sealing elements, in particular to an oil-gas bidirectional sealing structure.
Background
Along with the development of the hydraulic system to the high pressure and high speed, the hydraulic cylinder seal becomes a key component for determining the system performance, especially for the hydraulic systems such as a servo cylinder, aerospace and the like, the seal is required to have high reliability under high pressure and high speed, no leakage is generated during continuous long-time working, the friction force is required to be small, the system efficiency is improved, and the energy consumption is reduced. The currently used hydraulic sealing system can only perform unidirectional sealing under the low pressure of 35MPa, such as a Style seal, a U-shaped seal, a Y-shaped seal and the like, if the bidirectional sealing needs to be used in combination, the structure is complex, the size is large, the inclination and the denaturation easily occur in the movement process, the friction force is large, the leakage easily occurs in the current traditional sealing system for the hydraulic system with the pressure higher than 35MPa, the system is invalid, and even serious accidents are caused. The method has the advantages that the method is wide in China and wide in China, the temperature difference between the north and south climates is large, reliable sealing is carried out under low-temperature and high-temperature environments with different seasons, and the method is a key for improving the performance and the working efficiency of a hydraulic system in China.
With the rapid development of intelligent automobile industry in China, automatic driving becomes a future development trend, the most critical core technology in automatic driving is a brake-by-wire system, no matter in high-speed driving or urban working conditions, the brake system is needed to be intervened at any time, and braking is a critical system related to driving safety, at present, a braking device of the brake system is a hydraulic braking oil cylinder, and the sealing field of the hydraulic braking oil cylinder in China has the defect, so that at present, automobile enterprises in China mainly depend on import, and the brake system has a large gap with foreign products in the aspects of reliability and pressurizing and pressure maintaining performance.
In addition, the requirements of people on riding comfort performance of an automobile are continuously improved, vibration isolation of an automobile suspension is more and more important, the suspension is a key component for isolating road surface excitation in the running process of the automobile, the traditional passive suspension damping and rigidity design cannot be adjusted, the smoothness and the operation stability of the whole automobile cannot be considered, the hydro-pneumatic suspension has excellent vibration damping performance, high energy density, nonlinear rigidity damping characteristics and the like, and becomes an advanced automobile suspension system at present, so that the smoothness, the operation stability and the running safety of the automobile are effectively improved under different working conditions such as smooth road surfaces, off-road surfaces, no-load and full-load conditions of the automobile, and the hydro-pneumatic suspension has incomparable advantages of other suspension types, particularly for heavy vehicles, military vehicles and the like, a floating piston in the hydro-pneumatic suspension is used for sealing and isolating high-pressure oil liquid and high-pressure gas in a suspension cylinder, and the floating piston is the most core component of the hydro-pneumatic suspension, and the performance, the service life and reliability of the suspension are determined.
Sealing structures are needed in the hydraulic system, the hydraulic brake cylinder and the oil-gas suspension to isolate high-pressure liquid, oil and gas, so that good performance is realized. However, the existing sealing structure has the defects of low pressure resistance, easy leakage, poor temperature change resistance and the like, and can not meet the use requirements.
Disclosure of Invention
The invention mainly solves the technical problem of providing the oil-gas bidirectional sealing structure, which can solve the defects of sealing materials in the existing hydraulic system, hydraulic brake cylinder and oil-gas suspension when blocking high-pressure oil or gas pressure and leakage.
In order to solve the technical problems, the invention adopts a technical scheme that: provided is an oil-gas bidirectional sealing structure, comprising: a main seal ring, a secondary seal ring and a plurality of first seal rings; the main sealing ring is of a bilateral symmetry structure, a rectangular groove is formed in the middle of one side of the main sealing ring, which is in contact with the matching surface of the oil cylinder, a first elliptic groove is symmetrically formed in the two ends of the other side of the main sealing ring, the auxiliary sealing ring is arranged in the rectangular groove, and the first sealing ring is filled in the first elliptic groove in an interference mode; the main sealing rings are symmetrically provided with a plurality of main sealing lips on the left side and the right side of the rectangular groove, and the main sealing lips are contacted with the matching surface of the oil cylinder to form a multi-labyrinth sealing structure; as the piston moves to the left or right, the primary sealing lip on the respective side acts as the primary seal, thereby effecting a bi-directional seal.
In a preferred embodiment of the invention, the auxiliary sealing ring is of a bilateral symmetry structure, one side of the auxiliary sealing ring, which is contacted with the matching surface of the oil cylinder, is provided with two auxiliary sealing lips which are symmetrically distributed, two second elliptic grooves are symmetrically formed at two ends of the other side of the auxiliary sealing ring, and the second elliptic grooves are internally filled with second sealing rings in an interference manner.
In a preferred embodiment of the present invention, the front part is along the movement direction, and a lip front angle and a lip back angle are formed between the main sealing lip and the cylinder matching surface and between the auxiliary sealing lip and the cylinder matching surface, wherein the lip front angle is larger than the lip back angle.
In a preferred embodiment of the invention, three main sealing lips are respectively arranged at the left side and the right side of the rectangular groove, and a first main sealing lip, a second main sealing lip and a third main sealing lip are sequentially arranged from outside to inside, wherein the third main sealing lip only forms a lip front angle after being contacted with the matching surface of the oil cylinder.
In a preferred embodiment of the invention, the lip nose angle is 30-80 degrees; the back angle of the lip is 5-30 degrees.
In a preferred embodiment of the invention, the tops of the main sealing lip and the auxiliary sealing lip are of a platform structure, and the main sealing lip and the auxiliary sealing lip form surface contact with the matching surface of the oil cylinder.
In a preferred embodiment of the present invention, the interference filling amount of the first sealing ring and the second sealing ring is 10-40%.
In a preferred embodiment of the present invention, the first sealing ring and the second sealing ring are made of fluororubber or nitrile rubber, and the shore hardness of the sealing rings is 70-90.
In a preferred embodiment of the present invention, the first seal ring and the second seal ring are O-rings, rectangular rings or X-rings.
In a preferred embodiment of the present invention, the left and right sides of the main sealing ring are in non-contact fit with the piston, and the left and right sides of the auxiliary sealing ring are in non-contact fit with the main sealing ring.
The beneficial effects of the invention are as follows: according to the oil-gas bidirectional sealing structure, through the structural design of the main sealing ring and the auxiliary sealing ring which are in a bilateral symmetry structure, the function of bilateral bidirectional sealing can be met, and through the design of the multi-layer main sealing lip and the multi-layer auxiliary sealing lip, the flow of high-pressure oil liquid and gas can be effectively cut off, and zero leakage is realized; through the design of the bottom sealing rings of the main sealing ring and the auxiliary sealing ring, enough resilience force and reliable sealing performance are respectively provided for the main sealing ring and the auxiliary sealing ring, and the sealing structure is ensured to have reliable sealing performance and lower friction force and high fatigue life under the conditions of meeting high speed and extreme high and low temperature environments.
Drawings
FIG. 1 is a schematic cross-sectional view of a bi-directional oil and gas seal according to a preferred embodiment of the present invention in a sealed state;
the components in the drawings are marked as follows: 1. the sealing device comprises a main sealing ring, a secondary sealing ring, a first sealing ring, a second sealing ring, an oil cylinder matching surface, a piston, a rectangular groove, a first elliptic groove, a main sealing lip, a secondary sealing lip and a second elliptic groove, wherein the primary sealing ring, the secondary sealing lip and the secondary sealing lip are arranged on the main sealing ring, the secondary sealing lip and the secondary sealing lip respectively.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Referring to fig. 1, an embodiment of the present invention includes:
example 1
The invention discloses an oil-gas bidirectional sealing structure, which comprises:
the main sealing ring 1 is of a bilateral symmetry structure, a rectangular groove 11 is formed in the middle of one side of the main sealing ring 1, which is in contact with the cylinder matching surface 5, first elliptical grooves 12 are symmetrically formed in the two ends of the other side of the main sealing ring, the auxiliary sealing ring 2 is arranged in the rectangular groove 11, and the first sealing ring 3 is filled in the first elliptical grooves 12 in an interference manner; the main sealing ring 1 is positioned on the left side and the right side of the rectangular groove 11 and is provided with a plurality of main sealing lips 13 with integrated structures, and the main sealing lips 13 are contacted with the oil cylinder matching surface 5 to form a multi-labyrinth sealing structure.
The auxiliary sealing ring 2 is of a bilateral symmetry structure, the auxiliary sealing ring 2 is arranged in the rectangular groove 11, one side of the auxiliary sealing ring, which is in contact with the cylinder matching surface 5, is provided with two auxiliary sealing lips 21 which are of an integral structure and are symmetrically distributed, two second elliptic grooves 22 are symmetrically formed in two ends of the other side of the auxiliary sealing ring, and the second elliptic grooves 22 are internally filled with second sealing rings 4 in an interference manner and are in contact connection with the main sealing ring 1 through the second sealing rings 4.
Sealing grooves are formed between the left side and the right side of the main sealing ring 1 and the piston, namely, the two sealing grooves are in non-contact fit, and the left side and the right side of the auxiliary sealing ring 2 are also in non-contact fit with the main sealing ring 1. Through with between main sealing ring 1 and the piston 6, all leave certain clearance between vice sealing ring 2 and the main sealing ring 1, when seal structure is in limit high temperature environment or limit low temperature environment, because different material thermal expansion coefficient is different, the both sides clearance can prevent seal structure and be extruded under extreme temperature, influences sealed effect, avoids producing stress concentration and destruction simultaneously.
The first sealing ring 3 is filled in the first elliptical groove 12 in an interference manner, and the initial interference filling amount of the first sealing ring 3 is 10-40%. The first sealing ring 3 is made of fluororubber or hydrogenated nitrile rubber, in particular a rubber mixture composed of fluororubber or hydrogenated nitrile rubber and common additives in the field, the heat-resistant temperature is-45-220 ℃, and the hardness of the first sealing ring is adjusted to be 70-90 Shore hardness according to the use condition. The function is as follows: on one hand, the main sealing ring 1 is provided with balanced resilience force and enough supporting force, and the friction force is increased due to the increase of the contact area caused by the deflection of the main sealing ring in the movement process is prevented, so that the main sealing ring is ensured to have reliable sealing performance, and oil or gas with the pressure of 80MPa can be effectively sealed; on the other hand, the design of the second elliptical sealing grooves 12 at the bottom of the main sealing ring 1 provides a separate installation space for each first sealing ring 3, and the two first sealing rings 3 are separated, so that the first sealing rings 3 can be effectively prevented from extrusion deformation, and the service life and reliability of the main sealing ring can be improved.
And the second sealing ring 4 is filled in the second elliptic groove 22 in an interference manner, and the initial interference filling amount of the second sealing ring 4 is 10-40%. The second sealing ring 4 is made of fluororubber or hydrogenated nitrile rubber, in particular a rubber mixture composed of fluororubber or hydrogenated nitrile rubber and common additives in the field, the heat-resistant temperature is-45-220 ℃, and the hardness of the second sealing ring is adjusted to be 70-90 Shore hardness according to the use condition. The function is as follows: the auxiliary sealing ring 2 is supported in the rectangular groove 11 of the main sealing ring 1, uniform supporting force and enough resilience force are provided, and the auxiliary sealing ring is prevented from deflecting in the moving process, so that the auxiliary sealing ring is guaranteed to have reliable sealing performance, on the other hand, the auxiliary sealing ring 2 provides independent installation space for the two second sealing rings 4 through the design of the two second elliptic grooves 22 at intervals, extrusion deformation of the second sealing rings 4 can be effectively prevented, and the service life and reliability of the auxiliary sealing ring are improved.
The corners of the first and second elliptical grooves 12 and 22 are rounded to prevent the first and second sealing rings 3 and 4 from being scratched.
In the above main sealing ring, three main sealing lips 13 are respectively located at the left and right sides of the rectangular groove 11, and a first main sealing lip, a second main sealing lip and a third main sealing lip are sequentially arranged from outside to inside to form 3 sealing structures respectively. The front part is along the movement direction, a lip front angle and a lip back angle are formed between the first main sealing lip, the second main sealing lip and the matching surface of the oil cylinder, and the third main sealing lip only forms the lip front angle and has no lip back angle after contacting with the matching surface of the oil cylinder. The third seal structure formed by the third main seal lip can provide a supporting function in the movement process of the main seal ring to prevent the main seal ring 1 from deflecting besides the sealing function.
And a lip front angle and a lip back angle are formed between the two auxiliary sealing lips and the matching surface of the oil cylinder respectively along the movement direction.
The lip rake angle is greater than the lip relief angle. Specifically, the lip rake angle is 30-80 degrees; the back angle of the lip is 5-30 degrees. By the design that the front angle of the lip is far larger than the back angle of the lip, the pressure gradient near the front angle of the lip is larger than the pressure gradient of the back angle of the lip, which is favorable for the reverse pumping oil effect in the reciprocating motion process and improves the sealing performance. Meanwhile, only part of the sealing lip of the sealing surface is contacted with the matching surface, the contact area is small, and the contact friction force is not increased due to deflection in the movement process like a Style seal.
In addition, under the working condition of high sealing pressure, the tops of the main sealing lip 13 and the auxiliary sealing lip 21 are designed into a platform structure, so that surface contact is formed between the main sealing lip and the oil cylinder contact surface, and the phenomenon that the sealing lip is excessively worn due to stress concentration caused by too small contact area between the sealing lip and the oil cylinder matching surface can be avoided. The design can also avoid the supporting force of the first sealing ring and the second sealing ring acting on the main sealing ring and the auxiliary sealing ring to be reduced after the sealing lip is worn, and is favorable for improving the reliability of the sealing structure.
The main sealing ring and the auxiliary sealing ring are made of materials with low friction performance, such as polytetrafluoroethylene composite materials, and only the stable and reliable resilience force can be provided, so that the effects are the same.
The sealing structure moves leftwards or rightwards along with the piston, and the main sealing lip and the auxiliary sealing lip on the corresponding side play a main sealing role, so that bidirectional sealing is realized. The specific kinematic seal conditions are as follows:
when the piston moves leftwards, the oil cylinder is fixed, the left side seal plays a main sealing role, and three main sealing lips positioned on the left side can effectively reduce the oil pressure and leakage quantity, so that the oil or gas pressure reaching the auxiliary sealing ring is greatly reduced; meanwhile, the auxiliary sealing lip on the left side of the auxiliary sealing ring is contacted with the contact surface of the oil cylinder, and a structure with the front angle of the lip being larger than the rear angle of the lip is formed, so that the flow of residual oil or gas can be effectively cut off, and zero leakage is realized.
When the piston moves rightwards, the oil cylinder is fixed, the right side seal plays a main sealing role, and three main sealing lips positioned on the right side can effectively reduce the oil pressure and leakage quantity, so that the oil or gas pressure reaching the auxiliary sealing ring is greatly reduced; meanwhile, the auxiliary sealing lip on the right side of the auxiliary sealing ring is contacted with the contact surface of the oil cylinder, and a structure with the front angle of the lip being larger than the rear angle of the lip is formed, so that the flow of residual oil or gas can be effectively cut off, and zero leakage is realized.
According to the invention, through the mutual matching of the main sealing ring and the auxiliary sealing ring, after one sealing ring fails due to abrasion, the sealing performance of the other sealing ring is not affected, so that the reliability of the bidirectional sealing structure is improved.
In addition, a small gap is formed between the piston and the matching surface, a certain gap length is formed in the axial direction, so that the pressure transmitted to the sealing position in the oil cylinder is reduced, the piston and the matching surface are supported through a guide belt, the guide belt is made of a low-friction polytetrafluoroethylene composite material, radial supporting force is provided, the piston and the sealing ring are kept to have good coaxiality, and the roughness requirement of the sealing matching surface is lower than Ra 0.5 microns.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An oil and gas bidirectional sealing structure, which is characterized by comprising: a main seal ring, a secondary seal ring and a plurality of first seal rings; the main sealing ring is of a bilateral symmetry structure, a rectangular groove is formed in the middle of one side of the main sealing ring, which is in contact with the matching surface of the oil cylinder, a first elliptic groove is symmetrically formed in the two ends of the other side of the main sealing ring, the auxiliary sealing ring is arranged in the rectangular groove, and the first sealing ring is filled in the first elliptic groove in an interference mode; the main sealing rings are symmetrically provided with a plurality of main sealing lips on the left side and the right side of the rectangular groove, and the main sealing lips are contacted with the matching surface of the oil cylinder to form a multi-labyrinth sealing structure; as the piston moves leftwards or rightwards, the main sealing lip on the corresponding side plays a main sealing role, so that bidirectional sealing is realized;
the auxiliary sealing ring is of a bilateral symmetry structure, one side of the auxiliary sealing ring, which is in contact with the matching surface of the oil cylinder, is provided with two auxiliary sealing lips which are symmetrically distributed, two second elliptic grooves are symmetrically formed in two ends of the other side of the auxiliary sealing ring, and the second elliptic grooves are internally filled with second sealing rings in an interference manner;
the front part is along the movement direction, a lip front angle and a lip back angle are formed between the main sealing lip and the oil cylinder matching surface, and the auxiliary sealing lip and the oil cylinder matching surface, wherein the lip front angle is larger than the lip back angle; the lip front angle is 30-80 degrees; the back angle of the lip is 5-30 degrees;
the first sealing ring and the second sealing ring are made of fluororubber or nitrile rubber, and the Shore hardness of the first sealing ring and the second sealing ring is 70-90.
2. The oil-gas bidirectional sealing structure according to claim 1, wherein three main sealing lips are respectively arranged at the left side and the right side of the rectangular groove, and a first main sealing lip, a second main sealing lip and a third main sealing lip are sequentially arranged from outside to inside, wherein the third main sealing lip only forms a lip front angle after being contacted with the matching surface of the oil cylinder.
3. The oil-gas bidirectional sealing structure according to claim 1, wherein the tops of the main sealing lip and the auxiliary sealing lip are of a platform structure, and the main sealing lip and the auxiliary sealing lip form surface contact with the matching surface of the oil cylinder.
4. The oil-gas bidirectional sealing structure according to claim 1, wherein the interference filling quantity of the first sealing ring and the second sealing ring is 10-40%.
5. The oil and gas bi-directional seal structure of claim 1 wherein said first and second seal rings are O-rings, rectangular rings or X-rings.
6. The oil-gas bidirectional sealing structure according to claim 1, wherein the left side and the right side of the main sealing ring are in non-contact fit with the piston, and the left side and the right side of the auxiliary sealing ring are in non-contact fit with the main sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399984.XA CN109356900B (en) | 2018-11-22 | 2018-11-22 | Oil-gas bidirectional sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399984.XA CN109356900B (en) | 2018-11-22 | 2018-11-22 | Oil-gas bidirectional sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109356900A CN109356900A (en) | 2019-02-19 |
| CN109356900B true CN109356900B (en) | 2024-03-22 |
Family
ID=65338332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811399984.XA Active CN109356900B (en) | 2018-11-22 | 2018-11-22 | Oil-gas bidirectional sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109356900B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005816A (en) * | 2019-03-29 | 2019-07-12 | 清华大学 | A kind of high pressure reciprocation sealing structure |
| CN114688016B (en) * | 2022-04-11 | 2023-06-09 | 中国长江三峡集团有限公司 | Bidirectional sealing piston and hydraulic energy storage system with same |
| CN114962054B (en) * | 2022-06-16 | 2023-10-27 | 中国科学院兰州化学物理研究所 | Piston assembly and dynamic seal assembly for underwater engine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005147317A (en) * | 2003-11-18 | 2005-06-09 | Nok Corp | Sealing device and fuel injection pump |
| CN101608691A (en) * | 2009-06-30 | 2009-12-23 | 广州机械科学研究院 | Rockwell sealing ring and preparation method thereof |
| CN107002880A (en) * | 2014-11-13 | 2017-08-01 | 爱尔铃克铃尔股份公司 | Sealing device |
| WO2018037918A1 (en) * | 2016-08-24 | 2018-03-01 | Nok株式会社 | Sealing device |
| CN207212819U (en) * | 2017-09-20 | 2018-04-10 | 天台亚耐气动密封件有限公司 | A kind of cylinder piston |
| CN207333710U (en) * | 2017-09-22 | 2018-05-08 | 昆明理工大学 | A kind of bidirectional spring accumulation of energy polymeric seal circle with micro- texture sealing lip |
| CN209523939U (en) * | 2018-11-22 | 2019-10-22 | 清华大学 | A kind of oil gas Bidirectional seal structure |
-
2018
- 2018-11-22 CN CN201811399984.XA patent/CN109356900B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005147317A (en) * | 2003-11-18 | 2005-06-09 | Nok Corp | Sealing device and fuel injection pump |
| CN101608691A (en) * | 2009-06-30 | 2009-12-23 | 广州机械科学研究院 | Rockwell sealing ring and preparation method thereof |
| CN107002880A (en) * | 2014-11-13 | 2017-08-01 | 爱尔铃克铃尔股份公司 | Sealing device |
| WO2018037918A1 (en) * | 2016-08-24 | 2018-03-01 | Nok株式会社 | Sealing device |
| CN207212819U (en) * | 2017-09-20 | 2018-04-10 | 天台亚耐气动密封件有限公司 | A kind of cylinder piston |
| CN207333710U (en) * | 2017-09-22 | 2018-05-08 | 昆明理工大学 | A kind of bidirectional spring accumulation of energy polymeric seal circle with micro- texture sealing lip |
| CN209523939U (en) * | 2018-11-22 | 2019-10-22 | 清华大学 | A kind of oil gas Bidirectional seal structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109356900A (en) | 2019-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109356900B (en) | Oil-gas bidirectional sealing structure | |
| US4858937A (en) | Pressure controller for a buffer fluid seal | |
| US4052112A (en) | Piston seal | |
| CN110005816A (en) | A kind of high pressure reciprocation sealing structure | |
| CN103244686A (en) | Low-friction oil seal for shock absorber | |
| CN206017311U (en) | A kind of self-lubricating piston cylinder for pneumatic actuator | |
| CN102434672B (en) | Hydraulic cylinder sealing structure | |
| WO2017199871A1 (en) | Split seal ring | |
| CN210106593U (en) | High-pressure reciprocating sealing structure | |
| CN209523939U (en) | A kind of oil gas Bidirectional seal structure | |
| US7198275B2 (en) | Sealing and replenishment gasket | |
| CN205592278U (en) | Linear motion guiding device | |
| CN106838096A (en) | Hydro-pneumatic spring self-lubricating compensates floating piston | |
| CN106763415A (en) | Hydro-pneumatic spring floating piston | |
| CN104612041B (en) | A kind of grease is from supplementing slide plate body means for mounting coupling parts | |
| CN206577816U (en) | A kind of cone crusher machine dust ring | |
| CN204852344U (en) | Coaxial -type combined seal ring for piston rod | |
| GB1601674A (en) | Sliding seal for pistons and piston rods | |
| JPS6263233A (en) | Guide bush for shock absorber of car | |
| CN106801717A (en) | Hydro-pneumatic spring main piston | |
| CN209180482U (en) | A kind of actuator push rod with V-seal pair | |
| CN207278859U (en) | A kind of built-up piston | |
| CN201916276U (en) | Static-pressure plunger type hydraulic cylinder | |
| CN205013499U (en) | Damping vibration attenuation type straight line guiding device | |
| CN205592279U (en) | Linear motion guiding device's ball lubricating arrangement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |