CN217440421U - Sealing device for high-pressure hydraulic cylinder and piston - Google Patents
Sealing device for high-pressure hydraulic cylinder and piston Download PDFInfo
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- CN217440421U CN217440421U CN202221481957.9U CN202221481957U CN217440421U CN 217440421 U CN217440421 U CN 217440421U CN 202221481957 U CN202221481957 U CN 202221481957U CN 217440421 U CN217440421 U CN 217440421U
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- annular part
- annular
- hydraulic cylinder
- piston rod
- sealing ring
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Abstract
The utility model discloses a sealing device of a high-pressure hydraulic cylinder and a piston, which comprises an annular clapboard and a sealing ring component; the annular partition plate consists of a first annular part, a second annular part and a third annular part; the outer wall of the third annular part is tightly attached to the inner wall of the hydraulic cylinder, and the inner wall of the third annular part is tightly attached to the outer wall of the piston rod; the outer diameter of the first annular part is smaller than that of the third annular part and larger than that of the second annular part, and the inner diameter of the first annular part is larger than that of the third annular part and smaller than that of the second annular part; the first annular part, the second annular part and the third annular part respectively form an inner circular ring groove and an outer circular ring groove with the piston rod and the hydraulic cylinder; and a group of sealing ring assemblies are respectively arranged in the inner circular groove and the outer circular groove of the annular partition plate. The utility model discloses concentrate on a part with the sealed of pneumatic cylinder and piston rod, guaranteed the axiality of annular baffle and pneumatic cylinder, piston rod, the assembly of the sealing washer subassembly of being convenient for again simultaneously.
Description
Technical Field
The utility model belongs to the technical field of sealing device, specifically relate to a sealing device of high-pressure pneumatic cylinder and piston.
Background
The existing 10000PSI pressure class hydraulic tool hydraulic cylinder and adapter are sealed by 74 degrees of profile contact. On one hand, the machining of the 74-degree molded surface has high requirements on dimensional tolerance and coaxiality tolerance, and the molded surfaces cannot be tightly attached due to machining errors and assembly errors, so that oil leaks from a gap between the two molded surfaces; on the other hand, the surface quality of the molded surface is influenced by the abrasion and scratching of the molded surface in the assembling process, and the leakage is also caused, so that the sealing effect is influenced in both aspects, and the parts are scrapped.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to above-mentioned problem, compensate prior art not enough, provide a sealing device of high-pressure pneumatic cylinder and piston.
A sealing device for a high-pressure hydraulic cylinder and a piston comprises an annular partition plate and a sealing ring assembly; the annular partition plate consists of a first annular part, a second annular part and a third annular part; the outer wall of the third annular part is tightly attached to the inner wall of the hydraulic cylinder, and the inner wall of the third annular part is tightly attached to the outer wall of the piston rod; the outer diameter of the first annular part is smaller than that of the third annular part and larger than that of the second annular part, and the inner diameter of the first annular part is larger than that of the third annular part and smaller than that of the second annular part; the first annular part, the second annular part and the third annular part respectively form an inner circular ring groove and an outer circular ring groove with the piston rod and the hydraulic cylinder; and a group of sealing ring assemblies are respectively arranged in the inner circular groove and the outer circular groove of the annular partition plate.
Preferably, the annular partition is coaxial with the hydraulic cylinder and the piston rod.
Preferably, the sealing ring assembly consists of a lip-shaped sealing ring and an O-shaped sealing ring, and the O-shaped sealing ring is embedded in the lip-shaped sealing ring.
Preferably, the first annular portion, the second annular portion and the third annular portion are integrally formed.
For the assembly of the sealing ring assembly, in the pressure inflow direction, the outer diameter of the first annular part of the annular partition plate is smaller than the inner diameter of the hydraulic cylinder, and the inner diameter of the first annular part of the annular partition plate is larger than the diameter of the piston rod.
After oil pressure is introduced, the O-shaped sealing ring is fully deformed to enable the lip-shaped sealing ring to be tightly attached to the inner wall of the hydraulic cylinder and the piston rod, a closed volume is formed, and the lip-shaped sealing ring can resist abrasion caused by reciprocating motion of the piston rod.
Therefore, the utility model discloses make the sealed of pneumatic cylinder and piston rod concentrate on a part, guaranteed the axiality of annular baffle and pneumatic cylinder, piston rod, the assembly of the sealing washer subassembly of being convenient for again simultaneously.
The utility model discloses beneficial effect:
firstly, the utility model discloses the device can realize that the sealed of pneumatic cylinder and piston rod concentrates on a part, after adopting this device, through threaded connection between pneumatic cylinder and the adapter can, has left out 74 profiles.
② the utility model discloses the device has reduced hydraulic pressure chamber volume, also has certain effect to improving the speed that steps up.
③ the utility model discloses the device is insensitive to the pressure oscillation, long service life.
The utility model discloses only need change the sealing washer subassembly after becoming invalid, the maintenance cost is low.
Drawings
Fig. 1 is a schematic view of a sealing device according to the prior art.
Fig. 2 is one of the structural schematic diagrams of the sealing device of the present invention.
Fig. 3 is a second schematic structural view of the sealing device of the present invention.
The labels in the figure are: 1 is the pneumatic cylinder, 2 is annular partition plate, 3 is the piston rod, 4 is the sealing washer subassembly, 5 is the adapter, 6 is connecting thread, 201 is first annular portion, 202 is the second annular portion, 203 is the third annular portion, 204 is outer circular ring groove, 205 is inner circular ring groove.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model solved more clearly understand, it is right to combine the attached drawing and detailed description mode below the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2 and 3, the sealing device for the high-pressure hydraulic cylinder and the piston comprises an annular partition plate 2 and a sealing ring assembly 4; the annular partition plate 2 is composed of a first annular part 201, a second annular part 202 and a third annular part 203; the outer wall of the third annular part 203 is tightly attached to the inner wall of the hydraulic cylinder 1, and the inner wall of the third annular part 203 is tightly attached to the outer wall of the piston rod 3; the outer diameter of the first annular portion 201 is smaller than the outer diameter of the third annular portion 203 and larger than the outer diameter of the second annular portion 202, and the inner diameter of the first annular portion 201 is larger than the outer diameter of the third annular portion 203 and smaller than the inner diameter of the second annular portion 202; the first annular portion 201, the second annular portion 202, and the third annular portion 203 form an inner circular ring groove 205 and an outer circular ring groove 204 with the piston rod 3 and the hydraulic cylinder 1, respectively; and a group of sealing ring assemblies 4 are respectively arranged in the inner circular groove 205 and the outer circular groove 204 of the annular clapboard 2.
In particular, the annular partition 2 is coaxial with the hydraulic cylinder 1 and the piston rod 3.
Specifically, the seal ring assembly 4 is composed of a lip-shaped seal ring and an O-shaped seal ring, and the O-shaped seal ring is embedded in the lip-shaped seal ring.
Specifically, the first annular portion 201, the second annular portion 202, and the third annular portion 203 are integrally formed.
To facilitate the assembly of the packing assembly 4, the outer diameter of the first annular portion 201 of the annular partition plate 2 is smaller than the inner diameter of the hydraulic cylinder 1, and the inner diameter of the first annular portion 201 of the annular partition plate 2 is larger than the diameter of the piston rod 3 in the pressure inflow direction.
After oil pressure is introduced, the O-shaped sealing ring is fully deformed to enable the lip-shaped sealing ring to be tightly attached to the inner wall of the hydraulic cylinder 1 and the piston rod 3, a closed volume is formed, and the lip-shaped sealing ring can endure abrasion caused by reciprocating motion of the piston rod 3.
Therefore, the utility model discloses make pneumatic cylinder 1 and piston rod 3 sealed concentrate on a part, guaranteed annular baffle 2 and pneumatic cylinder 1, piston rod 3's axiality, the assembly of the sealing washer subassembly 4 of being convenient for again simultaneously.
Fig. 1 shows a schematic view of a sealing device according to the prior art, in which a hydraulic cylinder 1 and an adapter 5 are sealed by a 74 ° profile of a connecting thread 6. Adopt the utility model discloses the device has left out 74 profiles, realizes that the sealed of pneumatic cylinder 1 and piston rod 3 concentrates on a part.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (4)
1. A sealing device of a high-pressure hydraulic cylinder and a piston is characterized in that: the sealing device comprises an annular clapboard and a sealing ring component;
the annular partition plate consists of a first annular part, a second annular part and a third annular part; the outer wall of the third annular part is tightly attached to the inner wall of the hydraulic cylinder, and the inner wall of the third annular part is tightly attached to the outer wall of the piston rod; the outer diameter of the first annular part is smaller than that of the third annular part and larger than that of the second annular part, and the inner diameter of the first annular part is larger than that of the third annular part and smaller than that of the second annular part; the first annular part, the second annular part and the third annular part respectively form an inner circular ring groove and an outer circular ring groove with the piston rod and the hydraulic cylinder; and a group of sealing ring assemblies are respectively arranged in the inner circular groove and the outer circular groove of the annular partition plate.
2. A high-pressure cylinder and piston seal as claimed in claim 1, wherein: the annular partition plate is coaxial with the hydraulic cylinder and the piston rod.
3. A high-pressure cylinder and piston seal as claimed in claim 1, wherein: the sealing ring assembly is composed of a lip-shaped sealing ring and an O-shaped sealing ring, and the O-shaped sealing ring is embedded in the lip-shaped sealing ring.
4. A high-pressure cylinder and piston seal as claimed in claim 1, wherein: the first annular portion, the second annular portion and the third annular portion are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221481957.9U CN217440421U (en) | 2022-06-15 | 2022-06-15 | Sealing device for high-pressure hydraulic cylinder and piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221481957.9U CN217440421U (en) | 2022-06-15 | 2022-06-15 | Sealing device for high-pressure hydraulic cylinder and piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217440421U true CN217440421U (en) | 2022-09-16 |
Family
ID=83223311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221481957.9U Active CN217440421U (en) | 2022-06-15 | 2022-06-15 | Sealing device for high-pressure hydraulic cylinder and piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217440421U (en) |
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2022
- 2022-06-15 CN CN202221481957.9U patent/CN217440421U/en active Active
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