CN101813187A - Piston ring capable of sealing gas and piston - Google Patents
Piston ring capable of sealing gas and piston Download PDFInfo
- Publication number
- CN101813187A CN101813187A CN 201010165057 CN201010165057A CN101813187A CN 101813187 A CN101813187 A CN 101813187A CN 201010165057 CN201010165057 CN 201010165057 CN 201010165057 A CN201010165057 A CN 201010165057A CN 101813187 A CN101813187 A CN 101813187A
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- China
- Prior art keywords
- external tooth
- piston ring
- tooth
- sealing gas
- ring
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- Pending
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- 238000007789 sealing Methods 0.000 title claims abstract description 75
- 230000006835 compression Effects 0.000 claims abstract description 31
- 238000007906 compression Methods 0.000 claims abstract description 31
- 210000000515 tooth Anatomy 0.000 claims description 200
- 239000007789 gas Substances 0.000 description 86
- 239000003921 oil Substances 0.000 description 6
- 238000006748 scratching Methods 0.000 description 6
- 230000002393 scratching effect Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010977 jade Substances 0.000 description 2
- 239000010721 machine oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- 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
- F16J9/14—Joint-closures
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Compressor (AREA)
Abstract
The invention discloses a piston ring capable of sealing gas and a piston, belonging to the technical field of piston moving in a cylinder block, particularly relating to the piston ring capable of sealing gas and the piston comprising the same. A cut communicated with the upper annular surface and the lower annular surface of an entity ring provided with the cut is Z-shaped to ensure that the internal tooth and the external tooth of the entity ring are combined; and the arc shape of the arc-shaped side wall of the internal tooth and the external tooth, the inside wall and the outside wall have the same centre of a circle. The surface of a piston body is provided with a compression which is vertical to the central generatrix of the piston body, and the internal and external tooth type piston ring for sealing gas is embedded into the compression. The invention has the advantages that the part between the internal gap and the external gap of the piston ring are sealed by the arc-shaped side wall of the internal tooth and the external tooth to ensure that gas on the upper side and the lower side of the piston ring can not be communicated.
Description
Technical field
The invention belongs to the technical field of the piston that in cylinder body, moves, particularly relate to the piston ring and the piston that has the piston ring of this sealing gas of sealing gas.
Background technique
The piston ring of sealing gas has a rectilinear otch now, when the piston ring of sealing gas is out of shape, the piston ring of sealing gas can elasticity change size, plays and the sealing of elasticity inboard wall of cylinder block, prevents the effect that the gas in the cylinder body flows on the piston ring both sides of sealing gas.But the piston ring elasticity of sealing gas changes, and makes the change of straight slits big or diminish, thereby the gas in the cylinder body is passed from straight slits, promptly produces poorly sealed piston ring gas blowby effect.Thereby all can gas blowby in suction stroke, compression stroke, expansion stroke, exhaust stroke, so waste fuel reduces power, and maximum problem is to use the time long more, the gap is big more, and gas blowby is more serious, and waste fuel is many more, power is more and more littler, burn oil occurs, befouling environment etc.The piston ring gas blowby is suffered a loss the output power of motor.
Summary of the invention
The present invention has two purposes, and first provides and can elasticity changes size, and being used in the piston again not can gas blowby, or air leak amount is less than the piston ring of the sealing gas of existing structure far away; Second provide have this can gas blowby, or air leak amount is less than the piston of piston ring of the sealing gas of existing structure far away.
Design of the present invention is: the otch of piston ring is arranged to " Z " font otch, make the entity ring become the profile of tooth combination of internal tooth and external tooth, as long as keep very close to each other between the curved wall between internal tooth and the external tooth, when between internal tooth and the external tooth during curved wall sliding transfer, interior external series gap between internal tooth and the external tooth does not communicate, gas in the cylinder body just can not pass piston ring, has avoided gas blowby from structure.If there is gas blowby to produce, also be to belong to defectiveness on the technology of curved wall between internal tooth and the external tooth, or piston ring and inboard wall of cylinder block cooperate that defectiveness causes on the technology.
Structure of the present invention is:
The interior external tooth type piston ring of sealing gas includes the entity ring 2 of an otch, and otch is cut into an annular entity that does not seal that disconnects mouthful to entity ring 2, do the cross section with entity ring 2 radius centered, the cross section is that rectangular is good, also can be square or oval, or circular.
It is the shape annular surface 3 identical with size that entity ring 2 has upper and lower surface, be madial wall 4 between the interior ring of two annular surfaces 3 up and down, it between the outer shroud of two annular surfaces 3 up and down outer side wall 5, it is characterized in that: the otch that communicates between two annular surfaces 3 is " Z " font otch 6 up and down, makes the profile of tooth combination of entity ring 2 one-tenth internal tooths 7 and external tooth 8; The internal surface of internal tooth 7 is parts of madial wall 4, and the outer surface of external tooth 8 is parts of outer side wall 5,8 one-tenth folded mutually structures of inside and outside two-layer sealing of internal tooth 7 and external tooth.
At annular surface 3, the width sum of internal tooth 7 and external tooth 8 equals the width of annular surface 3; Just entity ring 2 width of any position on radius equate everywhere, and 8 one-tenth interior foreign ministers are folded for internal tooth 7 and external tooth, are the phase stack structures that does not have the slit.
The arc of the curved wall 9 of internal tooth 7 and external tooth 8 is identical, and the arc of the curved wall 9 of internal tooth 7 and external tooth 8 and madial wall 4 and outer side wall 5 are same centers of circle.So entity ring 2 is flexible when opening or shrinking, the curved wall 9 of internal tooth 7 and external tooth 8 is the level and smooth slip of arching trajectory of the same radius of edge all, does not produce the gap between the curved wall 9 of internal tooth 7 and external tooth 8.The Topland 10 of internal tooth 7 and the tooth bottom surface 11 of external tooth 8 are at the entity ring 2 flexible generation internal clearances that open, the Topland 10 of external tooth 8 and the tooth bottom surface 11 of internal tooth 7 are at the entity ring 2 flexible generation external series gaps that open, internal clearance and external series gap do not have gas channel, be that internal clearance and external series gap are by curved wall 9 sealings of closed fully internal tooth 7 and external tooth 8, when making entity ring 2 flexible opening, only produce two gaps that do not communicate of internal clearance and external series gap, two gaps that do not communicate can not make piston ring produce gas blowby.
The Topland 10 of internal tooth 7 is identical with size with the shape of the tooth bottom surface 11 of external tooth 8, and the Topland 10 of external tooth 8 is identical with size with the shape of the tooth bottom surface 11 of internal tooth 7.This spline structure helps when entity ring 2 flexible contraction states, and internal clearance and external series gap minimum further reduce the probability of gas blowby.
The arc length of the curved wall 9 of internal tooth 7 and external tooth 8 equates.Just internal tooth 7 is the same long with external tooth 8, and this spline structure helps when entity ring 2 flexible contraction states, and internal clearance and external series gap equate, and internal clearance and external series gap minimum, further reduces the probability of gas blowby.
Topland 10 is an arc, and tooth bottom surface 11 is the shape arc identical with size.Topland 10 no wedge angles like this, in that entity ring 2 is flexible when opening or shrinking, internal tooth 7 and external tooth 8 are difficult for scratching the curved walls 9 on opposites.Also be difficult for scratching inboard wall of cylinder block and being difficult for scratching piston body 21 compressions 22 outer ancient piece of jade, round, flat and with a hole in its centres.
The width of external tooth 8 is greater than the width of internal tooth 7.During to-and-fro motion, piston ring and inboard wall of cylinder block constantly rub piston in cylinder body, and piston ring and inboard wall of cylinder block all can be lossy, and entity ring 2 flexible opening can be filled up loss.The width of external tooth 8 is used for the reservation width of piston ring loss greater than the unnecessary width of the width of internal tooth 7.
The piston that has the interior external tooth type piston ring of above-mentioned a certain sealing gas, comprise columniform piston body 21, there is compression 22 on piston body 21 surfaces, and compression 22 is vertical with the newel line of piston body 21, it is characterized in that: the interior external tooth type piston ring 23 that is embedded with sealing gas in the compression 22.In compression 22, can embed the interior external tooth type piston ring 23 of one or more sealing gas.
Certainly, also should there be oil ring groove on piston body 21 surfaces, and oil ring groove should embed the oil seal ring, and the present invention does not relate to the oil seal ring, does not discuss at this.
Be embedded with the interior external tooth type piston ring 23 of the sealing gas that two outer diameters of stacked on top of one another equate in the preferred compression 22.Prevent that the internal tooth 7 of interior external tooth type piston ring 23 of some sealing gas and the curved wall 9 of external tooth 8 from having gas blowby, also the entity part of the interior external tooth type piston ring 23 of available another sealing gas is blocked the gas of gas blowby.
Two " Z " font otch 6 of the interior external tooth type piston ring 23 of two sealing gas of stacked on top of one another do not coincide.The interior external tooth type piston ring 23 of a sealing gas has gas blowby, closes with two ring positions of interior external tooth type piston ring 23 gas blowbies of another sealing gas to be: " Z " font otch 6 of two piston rings does not coincide.
Center with the interior external tooth type piston ring 23 of two sealing gas is the center of circle, and the angle between the Topland 10 of two internal tooths 7 of the interior external tooth type piston ring 23 of two sealing gas of stacked on top of one another is 5 °-180 °." Z " font otch 6 of two piston rings does not coincide, and then " Z " font otch 6 of two piston rings has differential seat angle, and its differential seat angle is that the angle between the Topland 10 of two internal tooths 7 is 5 °-180 °.
Preferred differential seat angle is 180 °, and promptly the angle between the Topland 10 of two internal tooths 7 of the interior external tooth type piston ring 23 of two of stacked on top of one another sealing gas is 180 °.
The sealing gas working principle of piston that has the interior external tooth type piston ring of sealing gas:
At first, in suction stroke, piston moves downward, the upper edge of compression is pressed on the upper edge of piston ring, and piston ring is moved downward, and at this moment the upper edge three of twice compression ring and piston groove is closely linked, cut off on the air in the tooth case and scurry, the while mismatch is the lateral flow of secluding air again.What guarantee suction is inflammable mixture entirely.
Then, in compression stroke, in expansion stroke and the exhaust stroke, because the high pressure in the cylinder and the moving direction of piston, force the twice compression ring to be close together, the twice compression ring is pressed on the lower edge of piston groove simultaneously, scurries under the combustion gas of cut-out High Temperature High Pressure, and the while mismatch cuts off the combustion gas of High Temperature High Pressure again and laterally goes out cylinder.Thereby reach fuel saving, increase the effect that power prolongs the working life of piston ring.
Advantage of the present invention:
The advantage of the interior external tooth type piston ring of sealing gas: when piston ring shrinks when temperature is low, produce the gap between the Topland 10 of internal tooth 7 and external tooth 8 and the tooth bottom surface 11, promptly produce internal clearance and external series gap, internal clearance and external series gap are the curved walls 9 of internal tooth 7 and external tooth 8, but the curved wall 9 of internal tooth 7 and external tooth 8 is closely superimposed, very close to each other, then do not communicate between internal clearance and the external series gap, cause the gas between piston ring madial wall 4 and the outer side wall 5 not communicate, under the condition of piston ring outer side wall 5 and cylinder body madial wall good seal, the gas between piston ring madial wall 4 and the outer side wall 5 can not shrink the gap gas blowby that produces through piston ring.Solved the problem of the inevitable gas blowby of present piston ring constringency cleft.
The advantage of piston that has the interior external tooth type piston ring of sealing gas: after the interior external tooth type piston ring of sealing gas of the present invention is embedded in the compression of piston, make its piston be better than existing piston to the sealability of gas.After particularly being embedded in a compression of piston with the interior external tooth type piston ring of two sealing gas of the present invention, even if there is " Z " font otch of a piston ring that a small amount of gas blowby is arranged, also by the entity part of another piston ring sealing, make piston ring up and down the gas on both sides can not communicate.After using piston of the present invention, as follows to the beneficial effect of motor:
1, fuel saving, the waste of stopping fuel.
2, increase power.
3, prolong the working life of piston and piston ring, and in the motor entire work process, sealability does not reduce sealability along with mechanical wear.
4, sealability is better than existing sealing technique, breaks off gas blowby.
5, prevent that machine oil and part are corroded by waste gas, prolong the working life of machine oil and internal-combustion engine.
6, can effectively prevent the burn oil phenomenon.
Description of drawings
Fig. 1 is the structural representation of the sealing gas piston ring of existing straight shape otch;
Fig. 2 is the interior external tooth type piston ring structure schematic representation of upper and lower surface of the present invention for the sealing gas of " Z " font otch;
Fig. 3 is that the present invention has the piston structure schematic representation of upper and lower surface for the interior external tooth type piston ring of the sealing gas of " Z " font otch;
2 is entity rings, the 3rd among the figure, annular surface, the 4th, madial wall, the 5th, outer side wall, the 6th, " Z " font otch, the 7th, internal tooth, the 8th, external tooth, the 9th, curved wall, the 10th, Topland, the 11st, tooth bottom surface, the 21st, piston body, the 22nd, compression, the 23rd, the interior external tooth type piston ring of sealing gas.
Embodiment
The interior external tooth type piston ring of embodiment 1, sealing gas
As Fig. 2, include the entity ring 2 of an otch, otch is cut into an annular entity that does not seal that disconnects mouth to entity ring 2, does the cross section with entity ring 2 radius centered, and the cross section is a rectangular.
The upper and lower surface of entity ring 2 is the shape annular surface 3 identical with size, is madial wall 4 between the interior ring of two annular surfaces 3 up and down, is up and down outer side wall 5 between the outer shroud of two annular surfaces 3.The otch that communicates between two annular surfaces 3 is " Z " font otch 6 up and down, and " Z " font otch 6 is vertical with annular surface 3; Make the profile of tooth combining structure of entity ring 2 one-tenth internal tooths 7 and 8 two teeth of external tooth; The internal surface of internal tooth 7 is parts of madial wall 4, and the outer surface of external tooth 8 is parts of outer side wall 5,8 one-tenth folded mutually structures of interior external sealed of internal tooth 7 and external tooth.
At annular surface 3, the width sum of internal tooth 7 and external tooth 8 equals the width of annular surface 3; Just entity ring 2 width of any position on radius equate everywhere, and 8 one-tenth interior foreign ministers are folded for internal tooth 7 and external tooth, are the phase stack structures that does not have the slit.
The arc of the curved wall 9 of internal tooth 7 and external tooth 8 is identical, and the arc of the curved wall 9 of internal tooth 7 and external tooth 8 and madial wall 4 and outer side wall 5 are same centers of circle.So entity ring 2 is flexible when opening or shrinking, the curved wall 9 of internal tooth 7 and external tooth 8 is the level and smooth slip of arching trajectory of the same radius of edge all, does not produce the gap between the curved wall 9 of internal tooth 7 and external tooth 8.The Topland 10 of internal tooth 7 and the tooth bottom surface 11 of external tooth 8 are at the entity ring 2 flexible generation internal clearances that open, the Topland 10 of external tooth 8 and the tooth bottom surface 11 of internal tooth 7 are at the entity ring 2 flexible generation external series gaps that open, internal clearance and external series gap do not have gas channel, be that internal clearance and external series gap are by curved wall 9 sealings of closed fully internal tooth 7 and external tooth 8, when making entity ring 2 flexible opening, only produce two gaps that do not communicate of internal clearance and external series gap, two gaps that do not communicate can not make piston ring produce gas blowby.
The Topland 10 of internal tooth 7 is identical with size with the shape of the tooth bottom surface 11 of external tooth 8, and the Topland 10 of external tooth 8 is identical with size with the shape of the tooth bottom surface 11 of internal tooth 7.This spline structure helps when entity ring 2 flexible contraction states, and internal clearance and external series gap minimum further reduce the probability of gas blowby.
The interior external tooth type piston ring of the sealing gas that the arc length of the curved wall of embodiment 2, internal tooth and external tooth equates
As embodiment 1 entire infrastructure, but the arc length of the curved wall 9 of internal tooth 7 and external tooth 8 equates.Just internal tooth 7 is the same long with external tooth 8, and this spline structure helps when entity ring 2 flexible contraction states, and internal clearance and external series gap equate, and internal clearance and external series gap minimum, further reduces the probability of gas blowby.
As embodiment 2 entire infrastructure, but Topland 10 is an arc, and tooth bottom surface 11 is the shape arc identical with size.Topland 10 no wedge angles like this, in that entity ring 2 is flexible when opening or shrinking, internal tooth 7 and external tooth 8 are difficult for scratching the curved walls 9 on opposites.Also be difficult for scratching inboard wall of cylinder block and being difficult for scratching piston body 21 compressions 22 outer ancient piece of jade, round, flat and with a hole in its centres.
As embodiment 3 entire infrastructure, but the width of external tooth 8 is greater than the width of internal tooth 7.During to-and-fro motion, piston ring and inboard wall of cylinder block constantly rub piston in cylinder body, and piston ring and inboard wall of cylinder block all can be lossy, and entity ring 2 flexible opening can be filled up loss.The width of external tooth 8 is used for the reservation width of piston ring loss greater than the unnecessary width of the width of internal tooth 7.
As Fig. 2,3, as embodiment 1 entire infrastructure, but also comprise columniform piston body 21, there is compression 22 on piston body 21 surfaces, and compression 22 is vertical with the newel line of piston body 21, is embedded with the interior external tooth type piston ring 23 of sealing gas in the compression 22.In compression 22, can embed the interior external tooth type piston ring 23 of one or more sealing gas.
As embodiment 4 entire infrastructure, but also comprise columniform piston body 21, there is compression 22 on piston body 21 surfaces, and compression 22 is vertical with the newel line of piston body 21, are embedded with the interior external tooth type piston ring 23 of sealing gas in the compression 22.In compression 22, can embed the interior external tooth type piston ring 23 of one or more sealing gas.
And, be embedded with the interior external tooth type piston ring 23 of the sealing gas that two outer diameters of stacked on top of one another equate in the compression 22.Prevent that the internal tooth 7 of interior external tooth type piston ring 23 of some sealing gas and the curved wall 9 of external tooth 8 from having gas blowby, also the entity part of the interior external tooth type piston ring 23 of available another sealing gas is blocked the gas of gas blowby.
Two " Z " font otch 6 of the interior external tooth type piston ring 23 of two sealing gas of stacked on top of one another do not coincide, and prevent gas blowby up and down.
Center with the interior external tooth type piston ring 23 of two sealing gas is the center of circle, angle between the Topland 10 of two internal tooths 7 of the interior external tooth type piston ring 23 of two sealing gas of stacked on top of one another is 180 °, and promptly the angle between the Topland 10 of two internal tooths 7 of the interior external tooth type piston ring 23 of two of stacked on top of one another sealing gas is 180 °.
Claims (9)
1. the interior external tooth type piston ring of sealing gas, include the entity ring (2) of an otch, it is the shape annular surface (3) identical with size that entity ring (2) has upper and lower surface, between the interior ring of two annular surfaces (3) up and down madial wall (4), between the outer shroud of two annular surfaces (3) up and down outer side wall (5), it is characterized in that: the otch that communicates between two annular surfaces (3) is " Z " font otch (6) up and down, makes entity ring (2) become the profile of tooth combination of internal tooth (7) and external tooth (8); In annular surface (3), the width sum of internal tooth (7) and external tooth (8) equals the width of annular surface (3); The arc of the curved wall (9) of internal tooth (7) and external tooth (8) is identical, and the arc of the curved wall (9) of internal tooth (7) and external tooth (8) and madial wall (4) and outer side wall (5) are the same centers of circle; The Topland (10) of internal tooth (7) is identical with size with the shape of the tooth bottom surface (11) of external tooth (8), and the Topland (10) of external tooth (8) is identical with size with the shape of the tooth bottom surface (11) of internal tooth (7).
2. the interior external tooth type piston ring of sealing gas according to claim 1 is characterized in that: the arc length of the curved wall (9) of internal tooth (7) and external tooth (8) equates.
3. the interior external tooth type piston ring of sealing gas according to claim 1, it is characterized in that: Topland (10) is an arc, tooth bottom surface (11) are the shape arc identical with size.
4. according to the interior external tooth type piston ring of claim 1 or 2 or 3 described sealing gas, it is characterized in that: the width of external tooth (8) is greater than the width of internal tooth (7).
5. the piston that has the interior external tooth type piston ring of claim 1 or 2 or 3 or 4 described sealing gas, comprise columniform piston body (21), there is compression (22) on piston body (21) surface, compression (22) is vertical with the newel line of piston body (21), it is characterized in that: the interior external tooth type piston ring (23) that is embedded with sealing gas in the compression (22).
6. the piston of the interior external tooth type piston ring of sealing gas according to claim 5 is characterized in that: the interior external tooth type piston ring (23) that is embedded with the sealing gas that two outer diameters of stacked on top of one another equate in the compression (22).
7. the piston of the interior external tooth type piston ring of sealing gas according to claim 6, it is characterized in that: two " Z " font otch (6) of the interior external tooth type piston ring (23) of two sealing gas of stacked on top of one another do not coincide.
8. the piston of the interior external tooth type piston ring of sealing gas according to claim 7, it is characterized in that: the center with the interior external tooth type piston ring (23) of two sealing gas is the center of circle, and the angle between the Topland (10) of two internal tooths (7) of the interior external tooth type piston ring (23) of two sealing gas of stacked on top of one another is 5 °-180 °.
9. the piston of the interior external tooth type piston ring of sealing gas according to claim 8, it is characterized in that: the angle between the Topland (10) of two internal tooths (7) of the interior external tooth type piston ring (23) of two sealing gas of stacked on top of one another is 180 °.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010165057 CN101813187A (en) | 2010-05-07 | 2010-05-07 | Piston ring capable of sealing gas and piston |
| PCT/CN2011/073693 WO2011137747A1 (en) | 2010-05-07 | 2011-05-05 | Piston ring for sealing gas and piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010165057 CN101813187A (en) | 2010-05-07 | 2010-05-07 | Piston ring capable of sealing gas and piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101813187A true CN101813187A (en) | 2010-08-25 |
Family
ID=42620513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010165057 Pending CN101813187A (en) | 2010-05-07 | 2010-05-07 | Piston ring capable of sealing gas and piston |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101813187A (en) |
| WO (1) | WO2011137747A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011137747A1 (en) * | 2010-05-07 | 2011-11-10 | 王胜 | Piston ring for sealing gas and piston |
| CN103016201A (en) * | 2012-12-08 | 2013-04-03 | 赵军政 | Labyrinth type piston ring |
| CN108979893A (en) * | 2018-08-17 | 2018-12-11 | 全椒县全动机械有限公司 | A kind of piston ring of diesel engine and preparation method thereof |
| CN114294298A (en) * | 2021-12-31 | 2022-04-08 | 苗靖文 | Bridging type sealing ring |
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- 2011-05-05 WO PCT/CN2011/073693 patent/WO2011137747A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011137747A1 (en) * | 2010-05-07 | 2011-11-10 | 王胜 | Piston ring for sealing gas and piston |
| CN103016201A (en) * | 2012-12-08 | 2013-04-03 | 赵军政 | Labyrinth type piston ring |
| CN103016201B (en) * | 2012-12-08 | 2016-01-27 | 宁波高新区世代能源科技有限公司 | Labyrinth piston ring |
| CN108979893A (en) * | 2018-08-17 | 2018-12-11 | 全椒县全动机械有限公司 | A kind of piston ring of diesel engine and preparation method thereof |
| CN114294298A (en) * | 2021-12-31 | 2022-04-08 | 苗靖文 | Bridging type sealing ring |
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| Publication number | Publication date |
|---|---|
| WO2011137747A1 (en) | 2011-11-10 |
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