CN113757371B - U-shaped low damping sealing ring for single-acting shaft - Google Patents
U-shaped low damping sealing ring for single-acting shaft Download PDFInfo
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- CN113757371B CN113757371B CN202111094265.9A CN202111094265A CN113757371B CN 113757371 B CN113757371 B CN 113757371B CN 202111094265 A CN202111094265 A CN 202111094265A CN 113757371 B CN113757371 B CN 113757371B
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- groove
- sealing ring
- groove shoulder
- shaft
- shoulder
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- 238000007789 sealing Methods 0.000 title claims abstract description 120
- 238000013016 damping Methods 0.000 title claims abstract description 19
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 8
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
-
- 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
- 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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod 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
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
-
- 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
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
-
- 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
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Architecture (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a U-shaped low damping sealing ring for a single-acting shaft, which comprises an annular sealing ring body sleeved on the shaft, wherein an annular groove is formed in the sealing ring body, a first groove shoulder and a second groove shoulder are respectively formed in two sides of the groove, the inner diameter of the first groove shoulder is larger than the outer diameter of the shaft, an inclined inner circumferential surface is arranged on the second groove shoulder, the inner diameter of the outer side edge of the second groove shoulder is larger than the inner diameter of the inner side edge of the second groove shoulder, and the inner diameter of the inner side edge of the second groove shoulder is smaller than the outer diameter of the shaft; the inner diameter of the outer side edge of the second groove shoulder is larger than or equal to the outer diameter of the shaft; hydraulic oil enters the groove from the first groove shoulder, the outer peripheral surface and the two side surfaces of the sealing ring body are compressed in the sealing ring mounting groove by applying pressure to the groove, the pressure of the inner side edge of the second groove shoulder is larger than that of the outer side edge of the second groove shoulder, the second groove shoulder is compressed on the outer peripheral wall of the shaft, and the groove and the second groove shoulder are designed so that the sealing ring cannot twist or turn when the shaft moves at a high speed, so that reliable sealing is realized.
Description
Technical Field
The invention relates to a sealing ring, in particular to a U-shaped low-damping sealing ring for a single-acting shaft.
Background
The hydraulic sealing ring is widely applied to occasions such as pipelines and pressure vessels, the contact area of the sealing joint surface of the traditional sealing ring is large, large resistance is generated when the sealing joint surface moves at high speed, distortion and overturning are easy to occur, leakage is easy to occur, large friction force can cause great abrasion when the sealing ring works, and the service life is reduced. And the sealing ring with small contact area has low friction resistance but poor sealing effect.
Disclosure of Invention
The invention aims to solve the technical problem of providing the U-shaped low-damping sealing ring for the single-acting shaft, which has the advantages of good sealing effect, small damping area, small damping force, micro-deformation compensation and no twisting and overturning in the high-speed movement process.
In order to solve the technical problems, the technical scheme of the invention is as follows: the U-shaped low damping sealing ring for the single-acting shaft comprises an annular sealing ring body sleeved on the shaft, an annular groove is formed in the annular inner wall of the sealing ring body facing the shaft, two annular groove shoulders are respectively arranged on two sides of the groove, each groove shoulder comprises a first groove shoulder and a second groove shoulder, the inner diameter of each first groove shoulder is larger than the outer diameter of the shaft, an inclined surface obliquely extending from the outer side edge to the inner side edge of each second groove shoulder is arranged on each second groove shoulder, the inner diameter of the outer side edge of each second groove shoulder is larger than the inner diameter of the inner side edge of each second groove shoulder, and the inner diameter of the inner side edge of each second groove shoulder is smaller than the outer diameter of the shaft; the inner diameter of the outer side edge of the second groove shoulder is larger than or equal to the outer diameter of the shaft.
As a preferable technical scheme, the inner surface of the groove is an arc-shaped surface.
As a preferable technical scheme, the inner surface of the groove is an arc-like surface formed by a plurality of continuous folded surfaces.
As a preferred technical scheme, in the uninstalled state, an included angle of 5-20 degrees is formed between the annular inner surface of the second groove shoulder and the outer surface of the shaft.
As a preferable technical scheme, in the installation state, the annular inner surface of the second groove shoulder is pressed with the outer surface of the shaft, and the outer edges of the pressing contact surfaces of the annular inner surface and the shaft are provided with narrow gaps, wherein the length of each narrow gap is 5% -20% of the length of each pressing contact surface.
As a preferable technical scheme, the groove is arranged in the center of the inner peripheral surface of the sealing ring body.
As a preferable technical scheme, an annular check ring for eliminating the gap is arranged in the mounting groove at the outer side of the second groove shoulder of the sealing ring body.
Due to the adoption of the technical scheme, the U-shaped low damping sealing ring for the single-acting shaft comprises the annular sealing ring body sleeved on the shaft, an annular groove is formed in the annular inner wall of the sealing ring body facing the shaft, two annular groove shoulders are respectively arranged on two sides of the groove, each groove shoulder comprises a first groove shoulder and a second groove shoulder, the inner diameter of each first groove shoulder is larger than the outer diameter of the shaft, an inclined surface extending from the outer edge to the inner edge of each second groove shoulder in an inclined manner is arranged on each second groove shoulder, the inner diameter of the outer edge of each second groove shoulder is larger than the inner diameter of the inner edge of each second groove shoulder, and the inner diameter of the inner edge of each second groove shoulder is smaller than the outer diameter of the shaft; the inner diameter of the outer side edge of the second groove shoulder is larger than or equal to the outer diameter of the shaft; when the sealing ring is used, hydraulic oil enters the annular groove from the first groove shoulder, the hydraulic oil compresses the outer peripheral surface and the two side surfaces of the sealing ring body in the sealing ring mounting groove by applying pressure to the annular groove, the pressure of the inner side edge of the second groove shoulder is larger than that of the outer side edge of the second groove shoulder, so that the second groove shoulder is compressed on the outer peripheral wall of the shaft, and the grooves and the second groove shoulder are designed so that the sealing ring cannot twist or turn over when the shaft moves at a high speed, and reliable sealing is realized.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
FIG. 1 is a schematic view of the structure of a groove with an arc surface on the inner surface;
FIG. 2 is a schematic view of a structure in which the inner surface of the groove is a plurality of continuous folding surfaces;
FIG. 3 is an enlarged view of FIG. 1 at I;
FIG. 4 is an assembled schematic view of an embodiment of the present invention;
FIG. 5 is a schematic view of an embodiment of the present invention in an installed condition, wherein the inner ring inclined surface of the second slot shoulder is pressed against the mating surface of the shaft;
FIG. 6 is a schematic diagram of the hydraulic oil flow in a sealed state according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the flow of hydraulic oil in the oil passing state according to an embodiment of the present invention;
FIG. 8 is a schematic view of the structure of the annular groove with a plurality of continuous folds on the inner surface thereof;
FIG. 9 is a schematic illustration of an embodiment of the present invention applied to a cylinder end cover;
In the figure: 1-axis; 21-a seal ring body; 22-grooves; 31-a first slot shoulder; 32-a second slot shoulder; 4-check ring.
Detailed Description
The invention is further illustrated in the following, in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. It is needless to say that the person skilled in the art realizes that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive in scope.
As shown in fig. 1, 3 and 4, the U-shaped low damping seal ring for a single-acting shaft comprises an annular seal ring body 21 sleeved on the shaft 1, an annular groove 22 is formed in the annular inner wall of the seal ring body 21 facing the shaft 1, two annular groove shoulders are respectively formed on two sides of the groove 22, each groove shoulder comprises a first groove shoulder 31 and a second groove shoulder 32, the inner diameter of the first groove shoulder 31 is larger than the outer diameter of the shaft 1, an inclined surface extending from the outer edge to the inner edge of the second groove shoulder 32 in an inclined manner is formed in the second groove shoulder 32, the inner diameter of the outer edge of the second groove shoulder 32 is larger than the inner diameter of the inner edge of the second groove shoulder 32, and the inner diameter of the inner edge of the second groove shoulder 32 is smaller than the outer diameter of the shaft 1; the inner diameter of the outer side edge of the second groove shoulder 32 is larger than or equal to the outer diameter of the shaft 1. The groove 22 is provided in the center of the inner peripheral surface of the seal ring body 21.
The inner surface of the groove 22 is an arc-shaped surface.
As shown in fig. 3 and4, in the uninstalled state, an included angle β of 10 ° to 15 ° is formed between the annular inner surface of the second groove shoulder 32 and the outer surface of the shaft 1, and in fig. 4, if the second groove shoulder 32 is not compressively deformed, a part of the structure interferes with the assembly member, and in fig. 4, the interfering part is indicated by a broken line, and this is merely to show a comparison of the shapes of the second groove shoulder 32 before and after assembly, and fig. 5 shows the structure in the installed state.
In the mounted state, as shown in fig. 5, the annular inner surface of the second slot shoulder 32 is pressed against the outer surface of the shaft 1, and the outer edges of the pressing contact surfaces of the annular inner surface and the pressing contact surfaces have a narrow gap, and the length of the narrow gap is 10% -15% of the length of the pressing contact surface.
An annular retainer ring 4 for eliminating the clearance is installed in the installation groove outside the second groove shoulder 32 of the seal ring body 21. The annular retainer ring 4 is a polytetrafluoroethylene retainer ring 4.
As shown in fig. 2 and 8, the inner surface of the groove 22 is an arc-like surface formed by a plurality of continuous folding surfaces. The sealing ring is made of medium soft polytetrafluoroethylene or medium hard nitrile rubber.
The U-shaped low damping sealing ring for the single-action shaft has the structural characteristics that:
1. The U-shaped low damping sealing ring for the single-acting shaft can realize one-way sealing. As shown in fig. 6, when the sealing ring is sealed from left to right, the groove shoulder on the left side of the sealing ring is lower due to the different heights of the two sides of the sealing ring, a certain gap is formed between the groove shoulder and the outer surface of the shaft 1, hydraulic oil can smoothly enter the annular groove 22 of the sealing ring, but pressure oil cannot flow out from the right side, and the pressure oil in the groove 22 can be reliably sealed. As shown in fig. 7, however, if the hydraulic oil enters from the right side of the second groove shoulder 32, the hydraulic oil easily flows out from the left side first groove shoulder 31 due to a certain gap at the left side first groove shoulder 31, and the sealing from right to left cannot be achieved. Similarly, when the installation directions are opposite, the sealing from right to left can be realized; in fig. 6 and 7, the fitting surfaces on both sides of the seal ring are drawn with a wider gap, which is an enlarged treatment for the sake of clarity of the hydraulic flow direction, and in the real object, the fitting surface gap on both sides of the seal ring is very small.
2. The single-acting shaft U-shaped low damping seal ring can realize that double-side pressure oil enters the seal ring groove 22. The U-shaped low damping sealing ring for the single-acting shaft is designed to be different in height of groove shoulders at two sides. When the sealing ring is used, as shown in fig. 6, when hydraulic oil comes from the left side, a certain gap is formed between the first groove shoulder 31 and the outer surface of the shaft 1, so that the hydraulic oil can smoothly enter the groove 22 of the sealing ring; as shown in fig. 7, when the hydraulic oil comes from the right side, the second groove shoulder 32 is in contact with the outer surface of the shaft 1 in a small area, that is, a certain gap is formed between the outer side edge of the second groove shoulder 32 and the outer surface of the shaft 1, and the outer pressure oil applies pressure on the inclined surface of the second groove shoulder 32, so that the second groove shoulder 32 and the outer surface of the shaft 1 generate a small gap, and the pressure oil enters the groove 22.
3. The low damping seal ring for the unidirectional shaft is designed to be high and low on two sides, as shown in fig. 6, the first groove shoulder 31 on the lower side enables hydraulic oil to smoothly enter the groove 22, and the second groove shoulder 32 on the higher side prevents hydraulic oil in the groove 22 from continuing to flow rightwards, so that a good sealing effect is ensured.
4. The second groove shoulder 32 on the higher side of the sealing ring is designed to be an inclined plane with a certain angle, so that stable sealing of the pressure oil in the groove 22 can be ensured. After the oil pressure in the groove 22 ensures that the pressing is carried out, the attaching force on the inner side of the groove 22 is larger than the attaching force on the outer side, so that reliable sealing is realized.
5. The groove 22 and the second groove shoulder 32 are beveled to form a stable seal. The pressure of hydraulic oil in the groove 22 makes the whole groove 22 deform along the curved surface direction, the deformation force makes the groove 22 compress both sides and the outer peripheral surface of the sealing ring body 21 on one hand, simultaneously the micro deformation generated by the deformation force makes the inclined side of the sealing ring second groove shoulder 32 compress, the micro deformation generated by the compression force makes the sealing surface generate certain pressure, and the sealing ring and all contact surfaces generate compression force.
6. The sealing surface of the sealing ring on one side of the groove shoulder has smaller width, small resistance during movement and smaller generated binding force than other common sealing rings.
7. The sealing ring structural design ensures that the sealing ring cannot be seriously deformed during working. The annular groove 22 is adopted to design the sealing ring, two side surfaces and the outer peripheral surface of the sealing ring body 21 can be tightly pressed in the groove 22, the sealing ring cannot be twisted or turned over when the sealing ring moves in height, and meanwhile, the second groove shoulder 32 of the sealing ring is designed to be of a structure with a narrow upper part and a wide lower part, so that the sealing ring cannot be twisted or turned over.
8. The groove 22 can be designed into an arc shape and a shape similar to an arc shape formed by a plurality of continuous folding surfaces, and good sealing effect can be achieved.
9. The trapezoid design of the second groove shoulder 32 of the sealing ring can effectively support the close fitting of the fitting surface, and reliable sealing is achieved.
10. The inner side of the sealing ring adopts a deep annular groove 22 sealing design, so that the contact surface of the sealing ring is tightly pressed by pressure oil, a good sealing effect can be achieved, and stable sealing is realized. Pressure oil enters the groove 22 from one side of the first groove shoulder 31, certain pressure is kept in the groove 22, the oil pressure reliably clings the other side of the sealing ring, which is close to the contact surface, stable sealing is realized, and the sealing principle is different from that of a conventional sealing ring.
11. The axial clearance between the sealing ring and the matching surface of the mounting groove is in a small clearance fit state, and if the clearance is larger, the polytetrafluoroethylene check ring 4 which is gapless with the matching surface is used, so that the sealing ring is prevented from being extruded into the matching clearance by high-pressure oil, and the sealing effect of the sealing ring is reduced or the sealing ring is damaged.
12. The difference with the conventional sealing ring in use is that: the gapless retainer ring 4 is added to ensure that the two outer side surfaces of the sealing ring are free of pressure oil, so that the pressure oil in the groove 22 achieves a good sealing effect, and the conventional sealing ring must ensure the outer side oil pressure to be tightly pressed.
13. The unidirectional low-damping sealing ring can only realize unidirectional sealing, and can be used as a bidirectional sealing ring when two sealing rings are symmetrically installed, and can be used in certain specific occasions.
Working principle:
the installation direction of the sealing ring is different, so that left side sealing or right side sealing can be realized.
Left side seal: when the sealing ring is installed, the left side of the sealing ring is lower, namely the first groove shoulder 31 is positioned at the left side, hydraulic oil at the left side generates pressure, a gap is reserved between the left side of the low-damping sealing ring and the shaft 1, the hydraulic oil smoothly enters the sealing ring groove 22, and the pressure oil entering the groove 22 compresses the sealing ring at the right side and cannot flow out from the right side due to the inclined surface design of the second groove shoulder 32 at the right side of the sealing ring, so that the left side sealing is realized.
Right side seal: when the sealing ring is installed, the right side of the sealing ring is lower, namely the first groove shoulder 31 is positioned on the right side, hydraulic oil on the right side generates pressure, a gap is reserved between the right side of the low-damping sealing ring and the shaft 1, the hydraulic oil directly enters the sealing ring groove 22, and as the second groove shoulder 32 on the left side of the sealing ring is designed into an inclined plane, the pressure oil entering the groove 22 compresses the left sealing ring and cannot flow out from the left side, so that the right side sealing is realized.
Fig. 9 shows a cross-sectional view of the present gasket applied to the cylinder end cover, where the two sides of the gasket are not in close fit with the mounting groove, so that an annular retainer ring 4 is mounted on the outside of the second groove shoulder 32. The sealing ring seals the oil in the hydraulic cylinder, and has good sealing effect.
The foregoing has shown and described the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. U-shaped low damping sealing washer for single-acting axle, its characterized in that: the sealing ring comprises an annular sealing ring body sleeved on a shaft, the sealing ring body is arranged in a sealing ring mounting groove, an annular groove is formed in the annular inner wall of the sealing ring body facing the shaft, two annular groove shoulders are respectively arranged on two sides of the groove, each groove shoulder comprises a first groove shoulder and a second groove shoulder, the inner diameter of each first groove shoulder is larger than the outer diameter of the shaft, an inclined surface which extends obliquely from the outer edge to the inner edge of each second groove shoulder is arranged on each second groove shoulder, the inner diameter of the outer edge of each second groove shoulder is larger than the inner diameter of the inner edge of each second groove shoulder, and the inner diameter of the inner edge of each second groove shoulder is smaller than the outer diameter of the shaft; the inner diameter of the outer side edge of the second groove shoulder is larger than or equal to the outer diameter of the shaft; in the installation state, the annular inner surface of the second groove shoulder is pressed against the outer surface of the shaft, and the outer edges of the pressing contact surfaces of the annular inner surface and the shaft are provided with narrow gaps, wherein the length of each narrow gap is 5% -20% of the length of the pressing contact surface;
When hydraulic oil comes from the outer side of the first groove shoulder, the hydraulic oil enters the groove through a gap between the first groove shoulder and the shaft, the hydraulic oil applies pressure to the groove, the pressure of the hydraulic oil in the groove enables the whole groove to deform along the curved surface direction, the deformation force enables the groove to compress the outer peripheral surface and the two side surfaces of the sealing ring body in the sealing ring mounting groove on one hand, simultaneously micro deformation generated by the deformation force enables the inclined surface of the second groove shoulder to compress, the pressure of the inner edge of the second groove shoulder is larger than the pressure of the outer edge of the second groove shoulder, the second groove shoulder is compressed on the outer peripheral wall of the shaft, and the design of the groove and the second groove shoulder enables the sealing ring not to twist or overturn when the shaft moves at a high speed, so that reliable sealing is achieved;
When the hydraulic oil comes from the outer side of the second groove shoulder, the hydraulic oil applies pressure on the inclined surface of the second groove shoulder, so that a small gap is formed between the second groove shoulder and the shaft, and the hydraulic oil enters the groove through the small gap;
The inner surface of the groove is an arc-shaped surface; in the uninstalled state, an included angle of 5-20 degrees is formed between the annular inner surface of the second groove shoulder and the outer surface of the shaft; the groove is arranged in the center of the inner peripheral surface of the sealing ring body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111094265.9A CN113757371B (en) | 2021-09-17 | 2021-09-17 | U-shaped low damping sealing ring for single-acting shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111094265.9A CN113757371B (en) | 2021-09-17 | 2021-09-17 | U-shaped low damping sealing ring for single-acting shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113757371A CN113757371A (en) | 2021-12-07 |
| CN113757371B true CN113757371B (en) | 2024-06-11 |
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ID=78796293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111094265.9A Active CN113757371B (en) | 2021-09-17 | 2021-09-17 | U-shaped low damping sealing ring for single-acting shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113757371B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2173190A (en) * | 1937-02-04 | 1939-09-19 | Frederick W Wilkening | Piston ring |
| DE4302251A1 (en) * | 1992-02-21 | 1993-08-26 | Bruss Dichtungstechnik | Compact seal as elastomer ring fitted in groove etc. - has asymmetrical cross-section w.r.t. centre axis parallel to sealing faces |
| JPH11248003A (en) * | 1998-03-05 | 1999-09-14 | Nok Corp | Sealing device |
| JP2005054827A (en) * | 2003-08-07 | 2005-03-03 | Nok Corp | Sealing device |
| CN202520952U (en) * | 2011-11-29 | 2012-11-07 | 郭强 | Long/short-lip unilaterally-sealed Y-shaped rubber moving seal ring |
| JP2013185702A (en) * | 2012-03-12 | 2013-09-19 | Kawasaki Heavy Ind Ltd | Sliding seal and combined sliding seal |
| CN210661329U (en) * | 2019-09-26 | 2020-06-02 | 凯氟隆（厦门）密封件有限公司 | Hydraulic cylinder piston sealing structure using tetrafluoro sealing ring |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5392436B2 (en) * | 2011-03-11 | 2014-01-22 | Ｎｏｋ株式会社 | Sealing device |
-
2021
- 2021-09-17 CN CN202111094265.9A patent/CN113757371B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2173190A (en) * | 1937-02-04 | 1939-09-19 | Frederick W Wilkening | Piston ring |
| DE4302251A1 (en) * | 1992-02-21 | 1993-08-26 | Bruss Dichtungstechnik | Compact seal as elastomer ring fitted in groove etc. - has asymmetrical cross-section w.r.t. centre axis parallel to sealing faces |
| JPH11248003A (en) * | 1998-03-05 | 1999-09-14 | Nok Corp | Sealing device |
| JP2005054827A (en) * | 2003-08-07 | 2005-03-03 | Nok Corp | Sealing device |
| CN202520952U (en) * | 2011-11-29 | 2012-11-07 | 郭强 | Long/short-lip unilaterally-sealed Y-shaped rubber moving seal ring |
| JP2013185702A (en) * | 2012-03-12 | 2013-09-19 | Kawasaki Heavy Ind Ltd | Sliding seal and combined sliding seal |
| CN210661329U (en) * | 2019-09-26 | 2020-06-02 | 凯氟隆（厦门）密封件有限公司 | Hydraulic cylinder piston sealing structure using tetrafluoro sealing ring |
Non-Patent Citations (1)
| Title |
|---|
| 新型双向密封件的接触变形及应力分析;叶子波;黄兴;润滑与密封;20071130;第32卷(第11期);第142-145页 * |
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| Publication number | Publication date |
|---|---|
| CN113757371A (en) | 2021-12-07 |
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