CN212455507U - Reciprocating compressor packing sealing mechanism - Google Patents
Reciprocating compressor packing sealing mechanism Download PDFInfo
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- CN212455507U CN212455507U CN202022028383.7U CN202022028383U CN212455507U CN 212455507 U CN212455507 U CN 212455507U CN 202022028383 U CN202022028383 U CN 202022028383U CN 212455507 U CN212455507 U CN 212455507U
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Abstract
The utility model provides a reciprocating compressor packing sealing mechanism, including packing sealing ring, the gas leakage sealing ring, decompression ring and metal spring ring, and set up a plurality of ring seal ring grooves of arranging in proper order between decompression ring front end piston rod and box body, form a series of clearances and inflation cavity of damming between annular and the annular, produce throttling effect by sealing medium when the clearance through tortuous labyrinth, through the setting of labyrinth seal ring groove, high-pressure gas in the cylinder carries out the one-level decompression at labyrinth ring groove department at first, reduce the impact of high-pressure gas in the cylinder, improve the sealed effect of sealing ring, increase packing structure's life, this structure is applicable in the gas storage compressor of packing seal pressure difference up to 40MPa and 20 MPa's oil free compressor of seal pressure difference. Meanwhile, in order to improve the convenience of field maintenance of the high-pressure packing, the pull rod connected with the packing box is designed in a sectional mode, and the packing can be divided into two sections for disassembly.
Description
Technical Field
The utility model relates to a reciprocating compressor packing sealing mechanism.
Background
The reciprocating compressor packing is a sealing element for preventing gas in a cylinder from leaking to a middle body through a piston rod, the general high-pressure packing structure is shown in figure 1, decompression and sealing are performed through a decompression ring and a main sealing ring, when the high-pressure gas impacts, the decompression ring and a sealing ring outer ring spiral spring are prone to breaking, the service life of the sealing ring is short, the current high-pressure reciprocating compressor with the pressure of more than 35MPa adopts a step cylinder form, the overhigh sealing pressure of the packing is avoided, and the oil-free compressor is limited by the sealing performance of the packing and the service life, and the general sealing pressure is not more than 10 MPa. Traditional high pressure filler is because decompression ring and sealing ring group are in large quantity, and the filler subassembly structure size is long, and it is inconvenient at the on-the-spot installation maintenance, must dismantle the cylinder and just can accomplish the change of packing sometimes, cost of maintenance height cycle length.
SUMMERY OF THE UTILITY MODEL
The to-be-solved background technical problem of the utility model is to provide a reciprocating compressor packing sealing mechanism can reduce the packing sealing pressure, improves spring strength, prolongs the packing life, improves the maintenance convenience of packing.
In order to solve the above problem, the to-be-solved technical scheme of the utility model is:
the utility model provides a reciprocating compressor packing sealing mechanism, includes a plurality of packing sealing rings, leaks gas sealing ring, first decompression ring, second decompression ring and metal spring ring, is equipped with labyrinth seal ring groove at first decompression ring front end, is equipped with segmentation connection formula pull rod at packing flange and stuffing box junction.
The labyrinth seal ring groove has a plurality of channels and is axially arranged along the direction of the piston rod.
The metal spring ring is arranged on the pressure reducing ring and the sealing ring, and is a non-spiral spring and provided with an opening.
The segmented connecting pull rod enables the packing assembly to be disassembled and assembled in two segments.
The utility model has the advantages that:
through arranging a plurality of annular sealing ring grooves which are arranged in sequence between a piston rod at the front end of a pressure reducing ring and a box body, a series of closure gaps and expansion cavities are formed between the ring grooves, a sealed medium generates a throttling effect when passing through a gap of a tortuous labyrinth, high-pressure gas in a cylinder firstly carries out primary pressure reduction at the labyrinth ring groove to reduce the impact of the high-pressure gas in the cylinder, then secondary and tertiary pressure reduction is carried out through two pressure reducing rings, the gas pressure is finally reduced to medium and low pressure by combining the pressure reduction effect, the working friction heat of the sealing ring is reduced, the sealing effect of the sealing ring is improved, a metal spring ring of a thick line warp can bear the impact of the high-pressure gas without breaking and damaging, the sealing effect of the sealing ring is improved, the service life of the packing sealing structure is prolonged, and meanwhile, in order to improve the convenience of field maintenance of high-pressure, the packing can be disassembled in two sections. The structure can be suitable for the gas storage compressor with the packing sealing pressure difference up to 40MPa and the oil-free compressor with the sealing pressure difference of 20 MPa.
Drawings
The invention will be further explained with reference to the drawings:
FIG. 1 shows a conventional high-pressure packing
Fig. 2 is a schematic view of the cross-section structure of the present invention
FIG. 3 is a schematic view of the local enlarged structure of the present invention
Fig. 4 is a schematic structural view of the metal spring ring of the present invention.
In the figure: the annular sealing ring groove 1, the first pressure reducing ring 2, the second pressure reducing ring 3, the packing sealing ring 4, the leakage sealing ring 5, the middle flange 6 of the packing component, the sectional type connecting pull rod 7, the nitrogen filling hole 9, the oil drain outlet 10, the second oil filling hole 11, the first oil filling hole 12 and the spring ring 13.
Detailed Description
As shown in figures 2 and 3, a reciprocating compressor packing sealing mechanism comprises a plurality of packing sealing rings 4, a gas leakage sealing ring 5, a first pressure reducing ring 2, a second pressure reducing ring 3 and a metal spring ring 13, wherein a plurality of annular sealing ring grooves 1 which are sequentially arranged are arranged between a piston rod at the front end of the pressure reducing ring of the first pressure reducing ring 2 and a box body, a series of intercepting gaps and expansion cavities are formed between the ring grooves, a sealed medium generates a throttling effect when passing through a gap of a zigzag labyrinth, high-pressure gas in a compressor cylinder is firstly subjected to primary pressure reduction at the labyrinth ring grooves by the arrangement of the labyrinth sealing ring grooves 1, the impact of the high-pressure gas in the cylinder is reduced, then secondary and tertiary pressure reduction is carried out by the first pressure reducing ring 2 and the second pressure reducing ring 3, the gas pressure is finally reduced to medium and low pressure by the combined pressure reducing effect, and the working friction heat of the sealing rings 4 is, the sealing effect of the sealing ring 4 is improved, the sealing effect of the sealing ring is improved, and the service life of the packing sealing structure is prolonged. The packing is provided with 2 lubricant holes, a first lubricant hole 12 is located behind the first set of seal rings 4, and a second lubricant hole 11 is spaced from the first lubricant hole 12 by 2 packing seal rings 4 to ensure that lubricant is evenly distributed to each ring set as the piston rod reciprocates. The filler is also provided with an oil drain outlet 10 for draining oil stains and gas leaked by the filler. And 0.1-0.15 MPa of nitrogen is injected into the packing component through the nitrogen filling hole 9, so that the sealing medium is prevented from leaking into the middle body and the machine body. The structure can be suitable for the gas storage compressor with the packing sealing pressure difference up to 40MPa and the oil-free compressor with the sealing pressure difference of 20 MPa.
As a preferable mode of the above embodiment, the labyrinth seal ring groove 1 has a plurality of passes and is arranged in a reciprocating direction in a piston rod direction. The labyrinth ring groove is provided with 3 paths as shown in figure 3, and the decompression ring 2 and the decompression ring 3 are used for carrying out three-stage decompression on high-pressure gas in a compressor cylinder, so that the gas pressure is better reduced.
In order to improve the reliability of the packing structure, the metal spring ring 13 is arranged on the decompression ring and the sealing ring, and the metal spring ring 13 is a non-spiral spring and is provided with an opening 15, and the structure is shown in figure 4.
The sectional type connecting pull rod 7 is used for improving the maintenance convenience of the packing assembly, so that the flange 6 and the packing box in the packing assembly can be divided into two sections for dismounting.
Claims (4)
1. The utility model provides a reciprocating compressor packing sealing mechanism, includes gas leakage sealing ring (5), a plurality of packing sealing ring (4), first decompression ring (2), second decompression ring (3), spring coil (13) and labyrinth seal ring groove (1), is equipped with segmentation connection formula pull rod (7), its characterized in that at packing flange (6) and stuffing box junction: the front end of the first pressure reducing ring (2) is provided with a labyrinth seal ring groove (1), a spring ring (13) and a sectional type connecting pull rod (7).
2. The packing seal mechanism of a reciprocating compressor according to claim 1, wherein: the labyrinth seal ring groove (1) has a plurality of channels and is arranged along the reciprocating motion direction of the piston rod.
3. The packing seal mechanism of a reciprocating compressor according to claim 1, wherein: the spring ring (13) is installed on the first decompression ring (2) and the sealing ring, and the spring ring (13) is a non-spiral spring and is provided with an opening (15).
4. The packing seal mechanism of a reciprocating compressor according to claim 1, wherein: the sectional connecting pull rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022028383.7U CN212455507U (en) | 2020-09-16 | 2020-09-16 | Reciprocating compressor packing sealing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022028383.7U CN212455507U (en) | 2020-09-16 | 2020-09-16 | Reciprocating compressor packing sealing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212455507U true CN212455507U (en) | 2021-02-02 |
Family
ID=74474485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022028383.7U Active CN212455507U (en) | 2020-09-16 | 2020-09-16 | Reciprocating compressor packing sealing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212455507U (en) |
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2020
- 2020-09-16 CN CN202022028383.7U patent/CN212455507U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230918 Address after: 100020 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC OILFIELD EQUIPMENT Corp. Address before: 430000 12 / F, block A2, Guanggu financial port, 77 Guanggu Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee before: SINOPEC OILFIELD EQUIPMENT Corp. Patentee before: Sinopec Petroleum Machinery Co.,Ltd. Sanji Branch |
|
| TR01 | Transfer of patent right |