CN211666968U - Piston sealing structure for hydraulic cylinder - Google Patents
Piston sealing structure for hydraulic cylinder Download PDFInfo
- Publication number
- CN211666968U CN211666968U CN201922411966.5U CN201922411966U CN211666968U CN 211666968 U CN211666968 U CN 211666968U CN 201922411966 U CN201922411966 U CN 201922411966U CN 211666968 U CN211666968 U CN 211666968U
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- China
- Prior art keywords
- piston
- piston rod
- seal
- ring
- cylinder body
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- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 title claims abstract description 56
- 230000003068 static effect Effects 0.000 claims abstract description 19
- 239000000428 dust Substances 0.000 claims abstract description 14
- 230000003139 buffering effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 16
- 239000003921 oil Substances 0.000 abstract description 10
- 239000010720 hydraulic oil Substances 0.000 abstract description 6
- 230000007246 mechanism Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a piston seal structure for pneumatic cylinder, including cylinder body, dust seal, piston rod seal, support guide ring, static seal, piston seal ring, rotary seal, support ring and scraper ring, the cylinder body inboard is equipped with the piston rod, be equipped with between cylinder body and the piston rod dust seal, the dust seal lower extreme is equipped with the piston rod seal, piston rod one side is equipped with support guide ring, the piston rod upper end is equipped with the scraper ring, the bottom of the piston rod end is equipped with into oil return opening. The utility model discloses set up dust seal circle, inside preventing outside dust, rainwater entering sealing mechanism, the quiet seal installation of setting is between piston and piston rod, and the effect is spilled in order to prevent hydraulic oil from between piston and the piston rod, has set up the support ring, prevents that the sealed effect that causes is poor and life weak grade effect that the bearing pressure that the piston rod out of plumb atress brought for the pole is sealed.
Description
Technical Field
The utility model relates to a pneumatic cylinder technical field particularly, relates to a piston seal structure for pneumatic cylinder.
Background
Hydraulic and pneumatic equipment is widely used in various aspects of industrial production, a hydraulic cylinder has no change from the application to the structure adopting a sealing element for sealing, the structure has less leakage amount and high volume efficiency, but has large friction resistance, the dynamic performance of the hydraulic cylinder is seriously influenced, the contact part of metal and the sealing element is abraded, and the service life of the hydraulic cylinder is shortened. For this reason, many scholars have conducted various studies and developed a gap sealing structure. By adopting the clearance sealing structure, the dynamic characteristic of the hydraulic cylinder is obviously improved, the hydraulic cylinder can be well used in a high-frequency motion environment, the service life is prolonged, but the structure has large leakage amount, particularly, when the hydraulic cylinder works under a high-pressure condition, the leakage amount is rapidly increased, the volume efficiency is reduced, and the hydraulic cylinder does not allow the internal leakage problem to occur in order to ensure the operation efficiency and keep a certain specific operation posture in the use process. The inner leakage is generated on the oil cylinder and mainly reflected in the piston sealing performance, the outer circle dynamic seal of the piston and the inner hole static seal of the piston are included, most of the original static seal designs adopt an O-shaped ring sealing mode, and a small part of the original static seal designs adopt a metal sealing mode, so that the oil cylinder has a certain sealing effect, is easy to wear and has short service life.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a piston seal structure for pneumatic cylinder to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a piston sealing structure for a hydraulic cylinder comprises a cylinder body, a dustproof sealing ring, a piston rod seal, a supporting guide ring, a static seal, a piston sealing ring, a rotary sealing ring, a supporting ring and an oil scraper ring, a piston rod is arranged at the inner side of the cylinder body, the dustproof sealing ring is arranged between the cylinder body and the piston rod, the lower end of the dustproof sealing ring is provided with the piston rod seal, one side of the piston rod is provided with the supporting guide ring, the static seal is arranged between the cylinder body and the piston rod, the lower end of the piston rod is provided with a piston, the piston sealing ring is arranged between the piston and the piston rod, the rotary sealing ring is arranged between the cylinder body and the piston rod, the support ring is arranged on the inner side of the cylinder body, one side of the rotary sealing ring is provided with a buffer sleeve, the upper end of the piston rod is provided with the oil scraper ring, and the bottom end of the piston rod is provided with an oil inlet and an oil return port.
Furthermore, a check ring is arranged between the cylinder body and the piston rod, and the check ring and the cylinder body are adhered and sleeved on the outer side of the piston rod.
Further, the piston sealing ring is fixedly arranged on the piston, and the piston ring is tightly attached to the cylinder body.
Furthermore, the dustproof sealing ring and the static seal are fixed on the piston rod and sealed with the cylinder body.
Furthermore, a guide sleeve is arranged between the cylinder body and the piston rod, and the thickness of the guide sleeve is 0.2 mm.
Furthermore, the top ends of the cylinder body and the piston rod are provided with buffer sleeves, and the buffer sleeves are sleeved on the piston rod through being bonded with the cylinder body.
Furthermore, the rotary sealing ring, the supporting ring and the piston sealing ring are tightly hooped on the piston rod to achieve the sealing effect.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model relates to a piston seal structure for pneumatic cylinder, traditional pneumatic cylinder piston includes piston excircle movive seal, piston hole static seal, the sealed form of O shape circle is adopted to the overwhelming majority of original static seal design, a small part adopts the metal seal form, though there is certain sealed effect, but easy wearing and tearing, short service life, this device is through installing the piston sealing ring on the piston, hug closely the cylinder wall, the unlikely leakage of process gas in the sealed cylinder, the dust seal circle has been set up, prevent outside dust, inside the rainwater entering seal mechanism, influence the viscosity of hydraulic oil and the effect of the inside sealing element seal lip of fish tail.
(2) The utility model discloses the static seal who sets up is installed between piston and piston rod, and the effect is in order to prevent that hydraulic oil from spilling between piston and the piston rod, has set up the support ring, is used for the supporting piston rod, prevents that the sealed effect that causes of the pressure-bearing unevenness that the piston rod out of plumb atress brought for the rod seal is poor and life weak point etc. effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a piston sealing structure for a hydraulic cylinder according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the interior of a piston seal structure for a hydraulic cylinder according to an embodiment of the present invention.
Reference numerals:
1. a cylinder body; 2. a dustproof sealing ring; 3. a retainer ring; 4. the piston rod is sealed; 5. a support guide ring; 6. static sealing; 7. sealing the piston; 8. a piston; 9. a piston rod; 10. a guide sleeve; 11. rotating the sealing ring; 12. A support ring; 13. a buffer sleeve; 14. a lock nut; 15. and an oil inlet and an oil return port.
Detailed Description
The following, with reference to the drawings and the detailed description, further description of the present invention is made:
referring to fig. 1-2, a piston sealing structure for a hydraulic cylinder according to an embodiment of the present invention includes a cylinder body 1, a dust seal ring 2, a piston rod seal 4, a support guide ring 5, a static seal 6, a piston seal ring 7, a rotary seal ring 11, a support ring 12 and a scraper ring 14, wherein a piston rod 9 is disposed at an inner side of the cylinder body 1, the dust seal ring 2 is disposed between the cylinder body 1 and the piston rod 9, the dust seal ring 2 mainly functions to prevent external dust and rainwater from entering the interior of a sealing mechanism to affect viscosity of hydraulic oil and scratch the sealing lip of an internal seal, the piston rod seal 4 is disposed at a lower end of the dust seal ring 2, the support guide ring 5 is disposed at one side of the piston rod 9, the static seal 6 is disposed between the cylinder body 1 and the piston rod 9, and a piston 8 is, be equipped with between piston 8 and the piston rod 9 piston seal ring 7, be equipped with between cylinder body 1 and the piston rod 9 rotary seal 11, 1 inboard of cylinder body is equipped with support ring 12, rotary seal 11 one side is equipped with buffer sleeve 13, the piston rod 9 upper end is equipped with scraper ring 14, the piston rod 9 bottom is equipped with into oil return opening 15.
Through the above technical scheme of the utility model, be equipped with retaining ring 3 between cylinder body 1 and the piston rod 9, retaining ring 3 bonds with cylinder body 1 and overlaps in the piston rod 9 outside, 7 fixed mounting of piston sealing ring are on piston 8, cylinder body 1 is hugged closely to piston 8 ring, dustproof sealing ring 2 is fixed in on the piston rod 9 and is sealed with cylinder body 1 with quiet sealed 6, be equipped with guide pin bushing 10 between cylinder body 1 and the piston rod 9, the thickness of guide pin bushing 10 is 0.2mm, cylinder body 1 is equipped with cushion collar 13 with the 9 tops of piston rod, cushion collar 13 bonds through with cylinder body 1 and overlaps on piston rod 9, rotary sealing ring 11, support ring 12 and piston sealing ring 7 all lock tightly on the piston rod, reach sealed effect.
When in specific application, the utility model relates to a piston seal structure for pneumatic cylinder, traditional pneumatic cylinder piston includes piston excircle movive seal, piston hole static seal, the sealed form of O shape circle is adopted to the overwhelming majority of original static seal design, the metallic seal form is adopted to the minority, though there is certain sealed effect, but easy wearing and tearing, short service life, this device is through installing piston seal 7 ring on piston 8, hug closely the cylinder wall, the process gas in the sealed cylinder is unlikely to leak, dustproof sealing ring 2 has been set up, prevent external dust, rainwater from getting into inside the sealing mechanism, influence the viscosity of hydraulic oil and the effect of fish tail internal seal sealing lip, the static seal 6 that sets up is installed between piston 8 and piston connecting rod 9, the effect is in order to prevent that hydraulic oil from spilling from between piston 8 and piston connecting rod 9, support ring 12 has been set up, be used for supporting the piston rod, the effects of poor sealing effect, short service life and the like caused by uneven bearing pressure brought to rod sealing by the fact that the piston rod 9 is not stressed vertically are prevented.
In the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A piston sealing structure for a hydraulic cylinder is characterized by comprising a cylinder body (1), a dustproof sealing ring (2), a piston rod seal (4), a supporting guide ring (5), a static seal (6), a piston sealing ring (7), a rotary sealing ring (11), a supporting ring (12) and an oil scraper ring (14), wherein a piston rod (9) is arranged on the inner side of the cylinder body (1), the dustproof sealing ring (2) is arranged between the cylinder body (1) and the piston rod (9), the piston rod seal (4) is arranged at the lower end of the dustproof sealing ring (2), the supporting guide ring (5) is arranged on one side of the piston rod (9), the static seal (6) is arranged between the cylinder body (1) and the piston rod (9), a piston (8) is arranged at the lower end of the piston rod (9), and the piston sealing ring (7) is arranged between the piston (8) and, be equipped with between cylinder body (1) and piston rod (9) rotary seal ring (11), cylinder body (1) inboard is equipped with support ring (12), rotary seal ring (11) one side is equipped with cushion collar (13), piston rod (9) upper end is equipped with scraper ring (14), piston rod (9) bottom is equipped with into oil return opening (15).
2. A piston sealing structure for a hydraulic cylinder according to claim 1, characterized in that a retainer ring (3) is arranged between the cylinder body (1) and the piston rod (9), and the retainer ring (3) and the cylinder body (1) are adhered and sleeved outside the piston rod (9).
3. A piston seal structure for a hydraulic cylinder according to claim 1, characterized in that the piston seal ring (7) is fixedly mounted on the piston (8), the piston (8) ring abutting against the cylinder body (1).
4. A piston seal structure for a hydraulic cylinder according to claim 1, characterized in that the dust seal (2) and the static seal (6) are fixed to the piston rod (9) and sealed with the cylinder body (1).
5. A piston sealing structure for a hydraulic cylinder according to claim 1, characterized in that a guide sleeve (10) is provided between the cylinder body (1) and the piston rod (9), the thickness of the guide sleeve (10) being 0.2 mm.
6. The piston sealing structure for the hydraulic cylinder is characterized in that a buffering sleeve (13) is arranged at the top ends of the cylinder body (1) and the piston rod (9), and the buffering sleeve (13) is sleeved on the piston rod (9) through being bonded with the cylinder body (1).
7. Piston seal structure for hydraulic cylinders according to claim 1, characterized in that the rotary seal ring (11), the support ring (12) and the piston seal ring (7) are all tightened on the piston rod for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922411966.5U CN211666968U (en) | 2019-12-28 | 2019-12-28 | Piston sealing structure for hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922411966.5U CN211666968U (en) | 2019-12-28 | 2019-12-28 | Piston sealing structure for hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211666968U true CN211666968U (en) | 2020-10-13 |
Family
ID=72737017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922411966.5U Expired - Fee Related CN211666968U (en) | 2019-12-28 | 2019-12-28 | Piston sealing structure for hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211666968U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738610A (en) * | 2021-09-24 | 2021-12-03 | 北京海德利森科技有限公司 | Piston type hydrogen compressor |
-
2019
- 2019-12-28 CN CN201922411966.5U patent/CN211666968U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738610A (en) * | 2021-09-24 | 2021-12-03 | 北京海德利森科技有限公司 | Piston type hydrogen compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201013 |