CN219262612U - Air valve compression sealing structure of compressor - Google Patents
Air valve compression sealing structure of compressor Download PDFInfo
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- CN219262612U CN219262612U CN202320291528.3U CN202320291528U CN219262612U CN 219262612 U CN219262612 U CN 219262612U CN 202320291528 U CN202320291528 U CN 202320291528U CN 219262612 U CN219262612 U CN 219262612U
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- air valve
- sealing
- seal
- annular groove
- piece
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Abstract
The utility model discloses a compression sealing structure of a compressor air valve, which comprises an air valve, an air valve outer shell and a compression piece, wherein the air valve is fixedly arranged in the air valve outer shell through the compression piece, the air valve outer shell is fixedly enclosed with the compression piece and forms a closed cavity structure, the sealing piece is arranged on the connecting surface of the air valve outer shell and the compression piece, and the sealing piece is of a hollow structure and is communicated with the cavity. According to the self-tightening sealing device, the sealing piece is arranged on the connecting surface of the air valve outer shell and the pressing piece, so that the air valve outer shell and the pressing piece can be sealed, the sealing piece is of a hollow structure and is communicated with the cavity, when the air valve outer shell is under high pressure, the outer side is deformed, the contact acting force between the outer wall surface and the connecting part is increased, the sealing specific pressure is increased, and the sealing specific pressure is increased as the internal pressure is higher, so that the self-tightening sealing effect is achieved, and the sealing performance is improved.
Description
Technical Field
The utility model relates to the technical field of compressor sealing equipment, in particular to a compressor air valve compression sealing structure.
Background
The piston compressor air valve is installed in the air valve hole of the air cylinder, the air valve compressing part comprises a valve pressing cover, a cover plate, a sealing element, a fastening bolt and the like, the fastening bolt generates pretightening force, the air valve is pressed on a spigot of the air valve hole through the cover plate and the valve cover, and meanwhile the sealing element is compressed to avoid air leakage.
Referring to fig. 1, in the prior art, a low-pressure air valve is sealed by a rubber O-ring, a high-pressure air valve is sealed by a soft metal material, common soft metal such as annealed aluminum or copper is welded by a round section copper wire or aluminum wire and then is ground into an equal diameter solid O-ring, a 45-degree chamfer is processed at the joint of a valve pressing cover and a gland, the gland is pressed by a nut, and the solid metal O-ring is extruded and deformed to realize a sealing function, and the triangular area enclosed by the two chamfers is smaller than the sectional area of the copper wire or the aluminum wire.
The high-pressure air valve seal belongs to forced seal, the sealing acting force is all generated by a double-end stud, the solid metal O-shaped ring can deform after screw threads are screwed, and although the sealing surface has a certain sealing specific pressure, the blocking gas realizes the sealing function through the gap of the sealing surface, when the high-pressure air valve seal works, the internal pressure of the air cylinder rises, the bolt stretches, the gland is displaced upwards, the sealing specific pressure tends to be reduced, and the sealing has the problem that larger bolt force is needed to ensure that the sealing specific pressure still exists in a working state and is easy to leak; the solid metal O-shaped ring is difficult to detach after being deformed and cannot be reused, a new sealing piece is needed to be replaced every time maintenance, the working temperature of the exhaust valve is high and can reach 180 ℃, the O-shaped ring is different from the cylinder gland and other materials, the temperature expansion coefficient is different, the sealing pressure ratio is possibly changed at high temperature, and the sealing performance is reduced.
Disclosure of Invention
The technical problem to be solved by the utility model is how to improve the tightness of the compressor air valve sealing and compacting structure under high pressure.
The utility model solves the technical problems by the following technical means: the air valve compression sealing structure of the compressor comprises an air valve, an air valve outer shell and a compression piece, wherein the air valve is fixedly arranged in the air valve outer shell through the compression piece, the air valve outer shell is fixedly enclosed with the compression piece and forms a closed cavity structure, the sealing piece is arranged on the connecting surface of the air valve outer shell and the compression piece, and the sealing piece is of a hollow structure and is communicated with the cavity.
The sealing piece is arranged on the connecting surface of the air valve outer shell and the pressing piece, so that the air valve outer shell and the pressing piece can be sealed, the sealing piece is arranged to be of a hollow structure and is communicated with the cavity, when the pressure is high, the outer wall surface deforms outwards, the contact acting force of the outer wall surface and the connecting part is increased, the sealing specific pressure is increased, the higher the internal pressure is, the larger the sealing specific pressure is, the self-tightening sealing effect is realized, and the sealing performance is improved.
As an optimized technical scheme, the sealing element is a metal hollow sealing ring, and a plurality of air holes are formed in the sealing element and are communicated with the cavity through the air holes.
As the preferable technical scheme, the air valve outer shell comprises an air cylinder shell, a valve pressing cover is further arranged in the air cylinder shell, and the pressing piece is connected and fastened with the air cylinder shell through a bolt and presses the air valve through the valve pressing cover.
As an optimized technical scheme, an annular groove matched with the sealing piece is formed on the connecting surface of the air valve outer shell and the pressing piece.
As the preferable technical scheme, the pressing piece comprises a pressing cover, the middle part of the pressing cover protrudes downwards to form an inverted convex structure, an annular groove is formed in the step of the pressing cover, and the sealing piece is in interference fit with the annular groove.
As the preferable technical scheme, the top of the cylinder shell is provided with a mounting hole matched with the gland protrusion, and the inner wall of the top of the mounting hole is provided with an annular groove.
As a preferred embodiment, the annular groove depth is smaller than the seal cross-sectional radius and the annular groove width is larger than the seal cross-sectional radius.
As an optimal technical scheme, the bottom end of the side wall of the gland boss is provided with an annular groove.
As a preferred embodiment, the annular groove depth is greater than the seal cross-sectional radius and the annular groove width is less than the seal cross-sectional radius.
As a preferable technical scheme, the air holes are coated with polytetrafluoroethylene.
The utility model has the advantages that:
(1) According to the self-tightening sealing device, the sealing piece is arranged on the connecting surface of the air valve outer shell and the pressing piece, so that the air valve outer shell and the pressing piece can be sealed, the sealing piece is of a hollow structure and is communicated with the cavity, when the air valve outer shell is under high pressure, the outer side is deformed, the contact acting force between the outer wall surface and the connecting part is increased, the sealing specific pressure is increased, and the sealing specific pressure is increased as the internal pressure is higher, so that the self-tightening sealing effect is achieved, and the sealing performance is improved.
(2) In the utility model, the sealing element is in interference fit with the annular groove, a deformation space is reserved for the sealing element, and the sealing element is convenient to detach and can be repeatedly used.
Drawings
FIG. 1 is a schematic diagram of a prior art compressor air valve compression seal structure according to the background of the utility model;
fig. 2 is a schematic diagram of the internal structure of the compression seal structure of the compressor air valve provided in embodiment 1 of the present utility model;
fig. 3 is a schematic diagram of a seal ring of a compression seal structure of a compressor air valve provided in embodiment 1 of the present utility model in a normal state;
fig. 4 is a schematic structural diagram of a sealing ring compression state of a compressor air valve compression sealing structure provided in embodiment 1 of the present utility model;
fig. 5 is a schematic diagram of the internal structure of the compression seal structure of the compressor air valve provided in embodiment 2 of the present utility model;
fig. 6 is a schematic diagram of a seal ring of a compression seal structure of a compressor air valve provided in embodiment 2 of the present utility model in a normal state;
fig. 7 is a schematic structural diagram of a sealing ring compression state of a compressor air valve compression sealing structure provided in embodiment 2 of the present utility model;
reference numerals: 1. an air valve; 2. pressing a valve cover; 3. a cylinder housing; 4. a metal hollow seal ring; 5. a gland; 6. a nut; 7. a double-end stud.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 2, the compressor air valve compresses tightly seal structure, including air valve 1, the air valve outside casing, compress tightly the piece, press valve housing 4, air valve 1 is fixed in the air valve outside casing through compressing tightly the piece, the air valve outside casing encloses with compressing tightly the piece and closes fixedly, and form a inclosed cavity structure, press valve housing 4 is located the cavity, the air valve outside casing is equipped with the sealing member with compressing tightly the junction surface of piece, the sealing member is hollow structure and with cavity intercommunication, in this embodiment, the air valve outside casing includes cylinder casing 3, compressing tightly the piece and including gland 5, the sealing member is metal hollow seal 4, the ring channel has been seted up with gland 5's junction surface to cylinder casing 3, interference fit has metal hollow seal 4 in the ring channel, wherein, a plurality of gas pockets have been seted up on the metal hollow seal 4, in this embodiment, the gas pocket overcoat has polytetrafluoroethylene in order to improve its leakproofness, metal hollow seal 4 is through gas pocket and cylinder casing 3 and 5 junction surface's gap and cavity intercommunication, the gas pocket is located the inside wall of metal hollow seal 4 towards the gap, the gas cavity, in this embodiment, the inside wall of metal hollow seal 4 is hollow seal 4, when receiving high temperature high pressure, the gas is by the gap entering into metal hollow seal 4, the inside seal is more than the hollow seal 4, high pressure has been realized, the high pressure expansion ratio is increased, and the inside seal effect has been realized, and the seal is more than the inside the hollow seal, and has been realized.
Referring to fig. 2, the cylinder housing 3 is fastened to the gland 5 by a bolt, and since the air valve 1 and the valve cover 2 are both located in the cylinder housing 3, when fastened by the bolt connection, the gland 5 compresses the air valve 1 by the valve cover 2, wherein the connecting member is not limited to the bolt, but may be a stud 7 and a nut 6, one end of the stud 7 is screwed to the cylinder housing 3, and the other end passes through the gland 5 and is screwed by the nut 6.
Referring to fig. 2, the middle part of the gland 5 protrudes downwards to form an inverted protruding structure, the top of the protruding part of the gland is recessed upwards to form an accommodating space, the top of the cylinder housing 3 is provided with a mounting hole matched with the protruding part of the gland 5, the step of the gland 5 is provided with an annular groove, the metal hollow sealing ring 4 is in interference fit with the annular groove, when the metal hollow sealing ring 4 is placed in the annular groove, the width of the annular groove is 0.6 to 0.8 times of the diameter of the metal hollow sealing ring 4, when the gland 5 is tightly pressed with the cylinder housing 3, the metal hollow sealing ring 4 is tightly abutted against the inner wall of the annular groove for the first time, and after high-pressure gas enters a hollow cavity in the metal hollow sealing ring 4, the gas in the hollow cavity expands, in this embodiment, the annular groove is formed in the inner wall of the top of the mounting hole, the depth of the annular groove is smaller than the radius of the section of the metal hollow sealing ring 4, the width of the annular groove is larger than the radius of the section of the metal hollow sealing ring 4, referring to fig. 3, the metal hollow sealing ring 4 is an O-shaped ring, the section is a ring, the wall thickness is 0.3 to 0.6 mm, the diameter of the air hole is 0.5 mm, the width of the annular groove is 0.6 to 0.8 times of the diameter of the metal hollow sealing ring 4, the depth of the annular groove is 1.3 to 1.7 times of the diameter of the metal hollow sealing ring 4, the section of the metal hollow sealing ring 4 becomes elliptical, and the outer side is tightly attached to the cylinder shell 3 to form an initial sealing specific pressure after the gland is pressed, referring to fig. 4.
The using method comprises the following steps: the inside of the metal hollow sealing ring 4 is communicated with the valve cavity through the air hole, when the pressure in the valve cavity rises, the internal pressure of the metal hollow sealing ring 4 also rises, the metal hollow sealing ring 4 is deformed outwards by high pressure, the contact acting force between the outer wall surface and the cylinder shell 3 and the gland 5 is increased, the sealing specific pressure is increased, the higher the internal pressure is, the larger the sealing specific pressure is, the self-tightening sealing effect is realized, the pressure rise cannot occur, the sealing specific pressure is reduced, the sealing reliability is better, the temperature change does not influence the self-tightening sealing effect, the gland 5 is detached when the checking is needed, and the O-shaped ring can be conveniently taken down and can be reused.
Example 2
Referring to fig. 5, the difference between the present embodiment and embodiment 1 is that the annular grooves are disposed at different positions and the air holes are disposed at different positions;
in this embodiment, the annular groove is formed at the bottom end of the side wall of the protruding portion at the bottom of the gland 5, the air hole is formed at the bottom of the metal hollow sealing ring 4, referring to fig. 6 and 7, the width of the annular groove is 0.6 to 0.8 times of the diameter of the section of the metal hollow sealing ring 4, and the depth of the annular groove is 1.3 to 1.7 times of the diameter of the section of the metal hollow sealing ring 4. After the gland is pressed, the cross section of the metal hollow seal ring 4 becomes elliptical, as shown in fig. 5. The inner side of the metal hollow sealing ring 4 is adhered to the compression cover 5, and the outer side is adhered to the cylinder shell 3, so that the initial sealing specific pressure is formed.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. The compressor air valve compresses tightly seal structure, its characterized in that includes air valve, air valve external shell, compresses tightly the piece, the air valve is fixed to be located in the air valve external shell through compressing tightly the piece, the air valve external shell encloses with compressing tightly the piece and closes fixedly to form a inclosed cavity structure, the air valve external shell is equipped with the sealing member with compressing tightly the junction surface of piece, the sealing member is hollow structure and communicates with the cavity.
2. The compressor air valve compression seal structure of claim 1, wherein the seal member is a metal hollow seal ring, and a plurality of air holes are formed in the seal member and are communicated with the cavity through the air holes.
3. The compressor air valve compressing and sealing structure according to claim 2, wherein the air valve outer housing comprises an air cylinder housing, a compressing valve cover is further arranged in the air cylinder housing, and the compressing member is connected and fastened with the air cylinder housing through a bolt and compresses the air valve through the compressing valve cover.
4. The compressor air valve compressing and sealing structure according to claim 3, wherein the connecting surface of the air valve outer shell and the compressing member is provided with an annular groove matched with the sealing member.
5. The compressor air valve compression seal structure according to claim 4, wherein the compression member comprises a gland, the middle of the gland protrudes downwards to form an inverted convex structure, an annular groove is formed in the step of the gland, and the seal member is in interference fit with the annular groove.
6. The compressor air valve compression sealing structure according to claim 5, wherein a mounting hole matched with the gland boss is formed in the top of the cylinder shell, and an annular groove is formed in the inner wall of the top of the mounting hole.
7. The compressor air valve compression seal of claim 6, wherein the annular groove depth is less than the seal cross-sectional radius and the annular groove width is greater than the seal cross-sectional radius.
8. The compressor air valve compression seal structure of claim 5, wherein an annular groove is provided at a bottom end of the side wall of the gland boss.
9. The compressor air valve compression seal of claim 8, wherein the annular groove depth is greater than the seal cross-sectional radius and the annular groove width is less than the seal cross-sectional radius.
10. The compressor air valve compression seal of claim 2, wherein the air holes are coated with polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320291528.3U CN219262612U (en) | 2023-02-17 | 2023-02-17 | Air valve compression sealing structure of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320291528.3U CN219262612U (en) | 2023-02-17 | 2023-02-17 | Air valve compression sealing structure of compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219262612U true CN219262612U (en) | 2023-06-27 |
Family
ID=86859771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320291528.3U Active CN219262612U (en) | 2023-02-17 | 2023-02-17 | Air valve compression sealing structure of compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219262612U (en) |
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2023
- 2023-02-17 CN CN202320291528.3U patent/CN219262612U/en active Active
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