CN218440624U - Anti-deformation packing sealing structure - Google Patents
Anti-deformation packing sealing structure Download PDFInfo
- Publication number
- CN218440624U CN218440624U CN202222610172.3U CN202222610172U CN218440624U CN 218440624 U CN218440624 U CN 218440624U CN 202222610172 U CN202222610172 U CN 202222610172U CN 218440624 U CN218440624 U CN 218440624U
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- sealing ring
- ring
- sealing
- box main
- piston rod
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Abstract
The utility model discloses a packing structure of preapring for an unfavorable turn of events shape, including the stuffing box main part, the piston rod pilot hole has been seted up at the middle part of stuffing box main part, and the inner chamber of stuffing box main part has first sealing ring, second sealing ring and fender gas ring from last to down fixed mounting in proper order. Only add a fender gas ring on traditional seal structure, simple structure, low cost protects the sealing ring through the fender gas ring that sets up, reduces the pressure that the sealing ring bore, avoids the phenomenon that the sealing ring appears cold flow and warp, makes the sealing ring can keep the better sealing performance to the piston rod.
Description
Technical Field
The utility model relates to a compressor piston rod seals technical field, concretely relates to packing structure of preapring for an unfavorable turn of events shape.
Background
A packing structure is required to be arranged in the compressor to seal the piston rod, so that the air tightness of the piston rod in the movement process is ensured. As shown in fig. 2, only a single sealing ring is arranged in a packing box in a conventional packing structure to seal a piston rod, and when the sealing ring is subjected to high pressure, part of the sealing ring is subjected to cold flow deformation, so that air leakage occurs at the joint of the sealing ring and the piston rod, and the sealing performance of the sealing ring on the piston rod is affected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a packing structure of preapring for an unfavorable turn of events shape to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: an anti-deformation packing sealing structure comprises a packing box main body, wherein a piston rod assembling hole is formed in the middle of the packing box main body, and a first sealing ring, a second sealing ring and an air blocking ring are fixedly installed in an inner cavity of the packing box main body from top to bottom in sequence;
when the first sealing ring and the second sealing ring bear excessive positive pressure, the air blocking ring has the effect of limiting the excessive deformation of the first sealing ring and the second sealing ring.
Preferably, the outer diameter of the gas blocking ring is the same as the outer diameters of the first sealing ring and the second sealing ring, and the inner diameter of the gas blocking ring is larger than the inner diameters of the first sealing ring and the second sealing ring.
Preferably, the side wall of the inner ring of the air blocking ring is uniformly provided with pressure reduction grooves which are axially distributed.
Preferably, grooves which are communicated with each other are formed among the pressure reduction grooves.
Compared with the prior art, the beneficial effects of the utility model are that: compared with the traditional sealing structure, the anti-deformation packing sealing structure has the advantages that only one gas baffle ring is added on the traditional sealing structure, the structure is simple, the cost is low, the sealing ring is protected by the arranged gas baffle ring, the pressure born by the sealing ring is reduced, the phenomenon of cold flow deformation of the sealing ring is avoided, and the sealing ring can keep better sealing performance on a piston rod;
the pressure reducing groove and the groove which are uniformly distributed are formed in the inner side wall of the gas blocking ring, the passing high-pressure gas is further shunted through the matching of the pressure reducing groove and the groove in the using process, the pressure of the sealing ring is further reduced by high pressure, and the protection of the gas blocking ring on the sealing ring is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of a conventional packing seal.
In the figure: 1. the packing box comprises a packing box body, 2, a piston rod assembly hole, 3, a first sealing ring, 4, a second sealing ring, 5, an air blocking ring, 6, a pressure reducing groove, 7 and a groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and fig. 2, the present invention provides a technical solution:
a deformation-preventing packing sealing structure comprises a packing box main body 1, wherein a piston rod assembly hole 2 for a piston rod to pass through is formed in the middle of the packing box main body 1, a first sealing ring 3, a second sealing ring 4 and an air blocking ring 5 are fixedly installed in an inner cavity of the packing box main body 1 from top to bottom in sequence, and the piston rod passing through the piston rod assembly hole 2 is sealed through the matching of the first sealing ring 3, the second sealing ring 4 and the air blocking ring 5 with the packing box main body 1 in the use process;
when the first sealing ring 3 and the second sealing ring 4 are subjected to excessive positive pressure, the gas blocking ring 5 has the effect of limiting the excessive deformation of the first sealing ring 3 and the second sealing ring 4.
As shown in fig. 2, in the conventional sealing structure, only two sealing rings are arranged in the stuffing box from top to bottom to seal the joint between the piston rod and the stuffing box. When applying high pressure to the P department of sealing ring, the inside position that is located the sealing ring can produce the phenomenon of cold flow, and the emergence of cold flow phenomenon can lead to the junction of sealing ring and piston rod to take place deformation, and the sealing ring of deformation can make appear the clearance between sealing ring and the piston rod, leads to the sealing ring to be relatively poor to the sealed effect of piston rod.
The utility model discloses an increase in the bottom of first sealing ring 3 and second sealing ring 4 and set up and keep off gas ring 5, keep off the external diameter of gas ring 5 and the external diameter of first sealing ring 3 and second sealing ring 4 the same, keep off the internal diameter of gas ring 5 and slightly be greater than the internal diameter of first sealing ring 3 and second sealing ring 4, set up the fender gas ring 5 that the internal diameter is greater than first sealing ring 3 and second sealing ring 4, make and keep off gas ring 5 and not contact with the lateral wall of piston rod, do not play the sealed effect to the piston rod.
When the first sealing ring 3 and the second sealing ring 4 bear high pressure, the gas blocking ring 5 is arranged to block the positions where cold flow phenomena occur at the first sealing ring 3 and the second sealing ring 4, the first sealing ring 3 and the second sealing ring 4 are protected, the sealing effect between the first sealing ring 3 and the piston rod and the sealing effect between the second sealing ring 4 and the piston rod are guaranteed, the first sealing ring 3 and the second sealing ring 4 are mainly made of polytetrafluoroethylene materials, and the gas blocking ring 5 is made of polyether ether ketone (PEEK) special high polymer materials, so that the gas blocking ring 5 has higher strength compared with the first sealing ring 3 and the second sealing ring 4, the first sealing ring 3 and the second sealing ring 4 are supported by the gas blocking ring 5 in the using process, and the first sealing ring 3 and the second sealing ring 4 are prevented from deforming after being subjected to high pressure;
evenly seted up in keeping off gas ring 5 and being axial distribution pressure reduction groove 6, and communicate each other through slot 7 between the pressure reduction groove 6, make the high pressure through keeping off gas ring 5 evenly shunt in keeping off gas ring 5 through pressure reduction groove 6 and the slot 7 that sets up, further reduce the pressure that first sealing ring 3 and second sealing ring 4 received to better improvement first sealing ring 3 and second sealing ring 4's sealing performance.
Claims (4)
1. The utility model provides a packing structure of preapring for an unfavorable turn of events shape, includes stuffing box main part (1), its characterized in that: a piston rod assembling hole (2) is formed in the middle of the stuffing box main body (1), and a first sealing ring (3), a second sealing ring (4) and an air blocking ring (5) are fixedly installed in an inner cavity of the stuffing box main body (1) from top to bottom in sequence;
when the first sealing ring (3) and the second sealing ring (4) bear excessive positive pressure, the gas blocking ring (5) has the effect of limiting the excessive deformation of the first sealing ring (3) and the second sealing ring (4).
2. The deformation-preventing packing seal structure according to claim 1, wherein: the outer diameter of the gas blocking ring (5) is the same as that of the first sealing ring (3) and the second sealing ring (4), and the inner diameter of the gas blocking ring (5) is larger than that of the first sealing ring (3) and that of the second sealing ring (4).
3. The deformation-preventing packing seal structure according to claim 1, wherein: and the side wall of the inner ring of the air blocking ring (5) is uniformly provided with pressure reduction grooves (6) which are axially distributed.
4. The deformation-preventing packing seal structure according to claim 3, wherein: grooves (7) which are communicated with each other are formed between the pressure reduction grooves (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222610172.3U CN218440624U (en) | 2022-09-30 | 2022-09-30 | Anti-deformation packing sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222610172.3U CN218440624U (en) | 2022-09-30 | 2022-09-30 | Anti-deformation packing sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218440624U true CN218440624U (en) | 2023-02-03 |
Family
ID=85083368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222610172.3U Active CN218440624U (en) | 2022-09-30 | 2022-09-30 | Anti-deformation packing sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218440624U (en) |
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2022
- 2022-09-30 CN CN202222610172.3U patent/CN218440624U/en active Active
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