CN204692232U - A kind of seal structure for piston ring of circular double-acting cylinder - Google Patents
A kind of seal structure for piston ring of circular double-acting cylinder Download PDFInfo
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- CN204692232U CN204692232U CN201520318512.2U CN201520318512U CN204692232U CN 204692232 U CN204692232 U CN 204692232U CN 201520318512 U CN201520318512 U CN 201520318512U CN 204692232 U CN204692232 U CN 204692232U
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- packing ring
- piston packing
- shape piston
- shape
- ring
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Abstract
The utility model is open a kind of easy for installation, seal the seal structure for piston ring of reliable circular double-acting cylinder, described O shape piston packing ring (2) is composite structure, comprise first, second and the 3rd O shape piston packing ring (21), and (23) (22), the section area of the radial direction of described first and second O shape piston packing rings is equal, internal diameter is equal and resiliently deformable forms certain pressure ground, the bottom of annular mounting groove (10) is linearly installed on contiguously overlappingly up and down with the annular mounting groove (10) of piston (1), 3rd O shape piston packing ring and the first and second O shape piston packing rings (21) are side by side and resiliently deformable forms certain pressure ground mutually near the linear oral area being assemblied in annular mounting groove contiguously, the part of 3rd O shape piston packing ring outwardly and with the inwall resiliently deformable of cylinder body (3) forms from the oral area of annular mounting groove that certain pressure is linear to be contacted.
Description
Technical field
The utility model relates to circular double-acting cylinder, is specifically related to a kind of seal structure for piston ring of circular double-acting cylinder.
Background technique
See Fig. 1, the seal structure for piston ring of a kind of circular double-acting cylinder common on existing market, comprises O shape piston packing ring 2 and the cylinder body 3 of the rectangular monomer structure of piston 1, radial cross section; Described piston 1 is rotatable and axis is assemblied among cylinder body 3 up and down, described piston 1 periphery is provided with annular mounting groove 10, O shape piston packing ring 2 is set in described annular mounting groove 10, a part for its periphery stretch out in annular mounting groove 10 and with the inwall Elastic Contact of cylinder body 3, the radial cross section of described O shape piston packing ring 2 is rectangle.There is following problem in the seal structure for piston ring of this circular double-acting cylinder:
1, circular double-acting cylinder in use for some time, its cylinder body 3 inwall is worn and expands, gap between the periphery of the O shape piston packing ring 2 of the monomer structure causing radial cross section rectangular and cylinder body 3 inwall increases, seal failure, cause the two ends gas blowby of piston 1, cause piston 1 can not promote cylinder piston rod acting and make cylinder ineffective.
The internal-and external diameter of the O shape piston packing ring 2 of the monomer structure that 2, radial cross section is rectangular differs greatly, and installs more difficult.
The O shape piston packing ring 2 of the monomer structure that 3, radial cross section is rectangular, between itself and the inwall of cylinder body 3 is the Elastic Contact in face, and thus surface friction drag is comparatively large each other, easily makes to produce in cylinder running to tremble, and accelerate the wearing and tearing of O shape piston packing ring 2, reduce working life.
Model utility content
The technical problems to be solved in the utility model is to provide a kind of seal structure for piston ring of easy for installation, sealing is reliable, surface friction drag is less circular double-acting cylinder.
For solving the problems of the technologies described above, the utility model takes following technological scheme;
A kind of seal structure for piston ring of circular double-acting cylinder, comprise piston, O shape piston packing ring and cylinder body, described piston is rotatable and be axially assemblied in up and down among cylinder body, described piston outer periphery is provided with annular mounting groove, O shape piston packing ring is assemblied in described annular mounting groove, it is characterized in that: described O shape piston packing ring is composite structure, comprise an O shape piston packing ring, 2nd O shape piston packing ring and the 3rd O shape piston packing ring, the section area of the radial direction of a described O shape piston packing ring and the 2nd O shape piston packing ring is equal, internal diameter is equal and resiliently deformable forms certain pressure ground, the bottom of annular mounting groove is linearly installed on contiguously overlappingly up and down with the annular mounting groove of piston, described 3rd O shape piston packing ring and an O shape piston packing ring and the 2nd O shape piston packing ring are side by side and resiliently deformable forms certain pressure ground mutually near the linear oral area being assemblied in annular mounting groove contiguously, the part of 3rd O shape piston packing ring outwardly and with the inwall resiliently deformable of cylinder body forms from the oral area of annular mounting groove that certain pressure is linear to be contacted.
Preferably, the radial cross section of a described O shape piston packing ring, the 2nd O shape piston packing ring and the 3rd O shape piston packing ring is circle or ellipse.
Preferably, a described O shape piston packing ring, the 2nd O shape piston packing ring and the 3rd O shape piston packing ring are made up of nonmetallic material.
Preferably, a described O shape piston packing ring, the 2nd O shape piston packing ring and the 3rd O shape piston packing ring are made up of nitrile butadiene rubber or ethylene propylene rubber or fluorine rubber or silicone rubber.
Preferably, a described O shape piston packing ring, the 2nd O shape piston packing ring and the 3rd O shape piston packing ring are made up of hollow metal material.
Preferably, a described O shape piston packing ring, the 2nd O shape piston packing ring and the 3rd O shape piston packing ring are made up of stainless steel or low carbon steel.
Compared with prior art, the utility model comprises following beneficial effect;
O shape piston packing ring described in the utility model is composite structure, comprise an O shape piston packing ring, the 2nd O shape piston packing ring and the 3rd O shape piston packing ring, compared with the O shape piston packing ring of the monomer structure that each O shape piston packing ring is rectangular with the radial cross section of the seal structure for piston ring of the circular double-acting cylinder of prior art, internal-and external diameter difference is little.Therefore, easy for installation.Meanwhile, after an O shape piston packing ring and the 2nd O shape piston packing ring and the 3rd O shape piston seal annular strain form certain pressure, form respectively gap, buffer function and seal action are served to pistons work process.In addition, the part of 3rd O shape piston packing ring outwardly and with the inwall resiliently deformable of cylinder body forms from the oral area of annular mounting groove that certain pressure is linear to be contacted, between the O shape piston packing ring of the monomer structure rectangular with the radial cross section of the seal structure for piston ring of the circular double-acting cylinder of prior art and the inwall of cylinder body be face Elastic Contact compared with, less with the area of contact of inboard wall of cylinder block.Thus, surface friction drag is little, and be not easy wearing and tearing, the life-span is improved, and can prevent from producing in cylinder running trembling.Further, an O shape piston packing ring, the 2nd O shape piston packing ring and the 3rd O shape piston packing ring are elastic linear contact each other, thus interactional compensation rate is large.Therefore, after adding lubricant grease, sealing effect is better.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the seal structure for piston ring of the circular double-acting cylinder of prior art;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is working principle schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail;
See Fig. 2, the seal structure for piston ring of circular double-acting cylinder of the present utility model, comprise piston 1, O shape piston packing ring 2 and cylinder body 3, described piston 1 is rotatable and axis is assemblied among cylinder body 3 up and down, described piston 1 periphery is provided with annular mounting groove 10, O shape piston packing ring 2 and is assemblied in described annular mounting groove 10.As seen from Figure 2, O shape piston packing ring 2 described in the utility model is composite structure, comprise an O shape piston packing ring 21, 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23, the section area of the radial direction of a described O shape piston packing ring 21 and the 2nd O shape piston packing ring 22 is equal, internal diameter is equal and resiliently deformable forms certain pressure ground, the bottom of annular mounting groove 10 is linearly installed on contiguously overlappingly up and down with the annular mounting groove 10 of piston 1, described 3rd O shape piston packing ring 23 and an O shape piston packing ring 21 and the 2nd O shape piston packing ring 22 are side by side and resiliently deformable forms certain pressure ground mutually near the linear oral area being assemblied in annular mounting groove 10 contiguously, the part of 3rd O shape piston packing ring 23 outwardly and with the inwall resiliently deformable of cylinder body 3 forms from the oral area of annular mounting groove 10 that certain pressure is linear to be contacted.So, compared with the O shape piston packing ring 2 of the monomer structure that each O shape piston packing ring is rectangular with the radial cross section of the seal structure for piston ring of the circular double-acting cylinder of prior art, internal-and external diameter difference is little.Therefore, easy for installation.Meanwhile, after an O shape piston packing ring 21 and the 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 are out of shape and form certain pressure, form respectively gap, buffer function and seal action are served to piston 1 working procedure.In addition, the part of 3rd O shape piston packing ring 23 outwardly and with the inwall resiliently deformable of cylinder body 3 forms from the oral area of annular mounting groove 10 that certain pressure is linear to be contacted, between the O shape piston packing ring 2 of the monomer structure rectangular with the radial cross section of the seal structure for piston ring of the circular double-acting cylinder of prior art and the inwall of cylinder body 3 be face Elastic Contact compared with, less with the area of contact of cylinder body 3 inwall.Thus, surface friction drag is little, and be not easy wearing and tearing, the life-span is improved, and can prevent from producing in cylinder running trembling.Further, O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 are elastic linear contact each other, thus interactional compensation rate is large.Therefore, after adding lubricant grease, sealing effect is better.
As seen from Figure 2, the radial cross section of O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 described in the utility model and the 3rd O shape piston packing ring 23 is circle.Certainly, the radial cross section of O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 also can be ellipse.This makes the area of contact between each O shape piston packing ring less, when their cross section is compressed distortion, under the effect of medium (gas) pressure, 3rd O shape piston packing ring 23 moves on to one side of annular mounting groove 10, and the periphery of an O shape piston packing ring 21 is formed the 3rd O shape piston packing ring 23 and compensates.Equally, under the effect of cylinder switching suction port medium (gas) pressure, the 3rd O shape piston packing ring 23 moves on to the another side of annular mounting groove 10, and the periphery of the 2nd O shape piston packing ring 22 is formed the 3rd O shape piston packing ring 23 and compensates.Like this, the 3rd O shape piston packing ring 23 just can gap between closed piston 1 and cylinder body 3, reaches the object of sealing.
Described O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 are made up of nonmetallic material.As long as namely O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 are that the nonmetallic material of 15%-30% are made by being subject to its radial cross section deformation band of certain pressure, they just can be out of shape preferably and play seal action preferably.
Described O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 are made up of nitrile butadiene rubber.This makes them have more good elastic deformability, can play seal action preferably.Described O shape piston packing ring the 21, a two O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 can be made up of ethylene propylene rubber or fluorine rubber or silicone rubber.This makes them have more good elastic deformability equally, can play seal action preferably.
Described O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 are made up of hollow metal material.As long as namely O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 are that the hollow metal material of 15%-30% is made by being subject to its radial cross section deformation band of certain pressure, they just can be out of shape preferably and play seal action preferably.
Described O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 are made up of stainless steel.This makes them have good elastic deformability, can play seal action preferably.One O shape piston packing ring the 21, the 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 also can be made up of low carbon steel.This makes them have more good elastic deformability equally, can play seal action preferably.
Working principle of the present utility model is as follows;
See Fig. 3, during utility model works, one O shape piston packing ring 21 and the 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 interact, and the 3rd O shape piston packing ring 23 is compensated and sealed, make periphery and cylinder body 3 contact internal walls of the 3rd O shape piston packing ring 23, and by a certain amount of for the 3rd O shape piston packing ring 23 precompression, and then make piston 1 contact with an O shape piston packing ring 21 with the 2nd O shape piston packing ring 22 and form precompressed, one O shape piston packing ring 21, 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 form initial sealing structure.Like this, piston 1, cylinder body 3 and between O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23, form the chamber of sealing, when the porting ventilation of cylinder, air pressure makes O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 be out of shape and seal.Enter the gas pressure forming the chamber sealed between O shape piston packing ring the 21, a 2nd O shape piston packing ring 22 and the 3rd O shape piston packing ring 23 with cylinder body 3 to move with regard to promoting piston 1, and drive piston rod 4 to move, cylinder is done work back and forth under the effect of cylinder switching suction port medium (gas) pressure, cylinder switching suction port medium (gas) pressure carries out work so repeatedly.
Claims (6)
1. the seal structure for piston ring of a circular double-acting cylinder, comprise piston (1), O shape piston packing ring (2) and cylinder body (3), described piston (1) is rotatable and axis is assemblied among cylinder body (3) up and down, described piston (1) periphery is provided with annular mounting groove (10), O shape piston packing ring (2) is assemblied in described annular mounting groove (10), it is characterized in that: described O shape piston packing ring (2) is composite structure, comprise an O shape piston packing ring (21), 2nd O shape piston packing ring (22) and the 3rd O shape piston packing ring (23), the section area of the radial direction of a described O shape piston packing ring (21) and the 2nd O shape piston packing ring (22) is equal, internal diameter is equal and resiliently deformable forms certain pressure ground, the bottom of annular mounting groove (10) is linearly installed on contiguously overlappingly up and down with the annular mounting groove (10) of piston (1), described 3rd O shape piston packing ring (23) and an O shape piston packing ring (21) and the 2nd O shape piston packing ring (22) are side by side and resiliently deformable forms certain pressure ground mutually near the linear oral area being assemblied in annular mounting groove (10) contiguously, the part of 3rd O shape piston packing ring (23) outwardly and with the inwall resiliently deformable of cylinder body (3) forms from the oral area of annular mounting groove (10) that certain pressure is linear to be contacted.
2. the seal structure for piston ring of circular double-acting cylinder according to claim 1, is characterized in that: the radial cross section of a described O shape piston packing ring (21), the 2nd O shape piston packing ring (22) and the 3rd O shape piston packing ring (23) is circle or ellipse.
3. the seal structure for piston ring of circular double-acting cylinder according to claim 1, is characterized in that: a described O shape piston packing ring (21), the 2nd O shape piston packing ring (22) and the 3rd O shape piston packing ring (23) are made up of nonmetallic material.
4. the seal structure for piston ring of circular double-acting cylinder according to any one of claim 1 to 3, is characterized in that: a described O shape piston packing ring (21), the 2nd O shape piston packing ring (22) and the 3rd O shape piston packing ring (23) are made up of nitrile butadiene rubber or ethylene propylene rubber or fluorine rubber or silicone rubber.
5. the seal structure for piston ring of circular double-acting cylinder according to claim 1 and 2, is characterized in that: a described O shape piston packing ring (21), the 2nd O shape piston packing ring (22) and the 3rd O shape piston packing ring (23) are made up of hollow metal material.
6. the seal structure for piston ring of circular double-acting cylinder according to claim 5, is characterized in that: a described O shape piston packing ring (21), the 2nd O shape piston packing ring (22) and the 3rd O shape piston packing ring (23) are made up of stainless steel or low carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318512.2U CN204692232U (en) | 2015-05-18 | 2015-05-18 | A kind of seal structure for piston ring of circular double-acting cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318512.2U CN204692232U (en) | 2015-05-18 | 2015-05-18 | A kind of seal structure for piston ring of circular double-acting cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN204692232U true CN204692232U (en) | 2015-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520318512.2U Expired - Fee Related CN204692232U (en) | 2015-05-18 | 2015-05-18 | A kind of seal structure for piston ring of circular double-acting cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN204692232U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832494A (en) * | 2015-05-18 | 2015-08-12 | 重庆青山工业有限责任公司 | Piston ring sealing structure of circular double-acting cylinder |
-
2015
- 2015-05-18 CN CN201520318512.2U patent/CN204692232U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832494A (en) * | 2015-05-18 | 2015-08-12 | 重庆青山工业有限责任公司 | Piston ring sealing structure of circular double-acting cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160119 Address after: 100089, No. 2, Red Hot Mill Street, Beijing, Xicheng District Patentee after: China Changan Automobile Group Address before: 402776 Bishan County, Chongqing green bar street Patentee before: Qingshan Industry Co., Ltd., Chongqing |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20170518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |