CN220828352U - Carbon dioxide compressor with recyclable leakage gas - Google Patents
Carbon dioxide compressor with recyclable leakage gas Download PDFInfo
- Publication number
- CN220828352U CN220828352U CN202322387842.4U CN202322387842U CN220828352U CN 220828352 U CN220828352 U CN 220828352U CN 202322387842 U CN202322387842 U CN 202322387842U CN 220828352 U CN220828352 U CN 220828352U
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- CN
- China
- Prior art keywords
- seal
- volute
- gap
- gas
- carbon dioxide
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 29
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 58
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 46
- 230000000694 effects Effects 0.000 description 4
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses a carbon dioxide compressor with recoverable leakage gas, which belongs to the technical field of air sealing of centrifugal compressors and comprises a volute; an impeller positioned within the volute; a driving shaft is connected and penetrates through the volute; a first sealing piece and a second sealing piece are sequentially arranged between the volute and the driving shaft along the axial direction of the driving shaft; a first gap is formed between the first sealing piece and the second sealing piece; a collection pipe passing through the scroll and communicating with the first gap; a first sealing piece and a second sealing piece are arranged between a volute and a driving shaft, and a first gap is formed between the first sealing piece and the second sealing piece; when the compressor operates, a small amount of high-pressure medium gas in the volute leaks into the first gap through the gap between the first sealing element and the driving shaft under the action of pressure difference, and the leaked gas can be timely recovered by utilizing a collecting pipeline communicated with the first gap, so that the leakage gas quantity is effectively reduced.
Description
Technical Field
The utility model relates to the technical field of centrifugal compressors, in particular to a carbon dioxide compressor with a recoverable leakage gas.
Background
The centrifugal compressor is a rotary machine, the medium gas obtains speed energy and pressure energy under the action of an impeller rotating at a high speed, and the speed energy of the medium gas is further converted into the pressure energy through the action of a diffuser, so that the pressure of the medium gas can be improved.
In order to ensure that the speed of the medium gas can be fully converted into pressure energy, the volute and a driving shaft for driving the impeller to rotate are required to be sealed; the sealing mode is usually used at the present stage and comprises labyrinth sealing, carbon ring sealing, mechanical sealing, dry gas sealing and the like; the labyrinth seal has poor sealing performance and large leakage quantity, and can be only used for low-pressure air sealing generally; the mechanical seal and the dry gas seal have good sealing effect, are generally applied to toxic and harmful gas seals which do not allow leakage, but have high cost; the sealing performance of the carbon ring seal is better than that of the labyrinth seal, but worse than that of the mechanical seal and the dry gas seal, and the carbon ring seal is generally applied to non-toxic and harmless medium-low pressure gas seal.
For carbon dioxide compressors, carbon ring seals are typically selected for economy since the medium gas is carbon dioxide, which is a non-toxic gas. In the use process of the carbon dioxide compressor, part of high-pressure carbon dioxide in the volute can leak to one side of the gear box through a gap between the carbon ring seal and the driving shaft under the action of pressure difference; particularly, when the pressure of the compressed carbon dioxide is relatively high, the leakage amount of the carbon dioxide is further increased, and part of the carbon dioxide is directly leaked near the compressor, and meanwhile, the part of the leaked carbon dioxide cannot be reused, so that waste is caused, and the economical efficiency is reduced.
Therefore, designing and developing a carbon dioxide compressor that can effectively recover leaked medium gas and reduce the amount of medium gas that directly leaks is a problem that is currently in need of solution.
Disclosure of utility model
For the problems in the prior art, the utility model provides the carbon dioxide compressor with recoverable leakage gas, wherein a first sealing element and a second sealing element are arranged between a volute and a driving shaft, and a first gap is arranged between the first sealing element and the second sealing element; when the compressor operates, a small amount of high-pressure medium gas in the volute leaks into the first gap through the gap between the first sealing element and the driving shaft under the action of pressure difference, and the leaked gas can be timely recovered by utilizing a collecting pipeline communicated with the first gap, so that the leakage gas quantity is effectively reduced, and the pollution degree to the environment is reduced.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
The utility model provides a carbon dioxide compressor with recoverable leakage gas, which comprises:
a scroll;
An impeller located within the volute; the impeller is connected with a driving shaft for driving the impeller to rotate, and the driving shaft penetrates through the volute; a first sealing piece and a second sealing piece are sequentially arranged between the volute and the driving shaft along the axial direction of the driving shaft; a first gap is provided between the first seal and the second seal;
And a collection conduit passing through the scroll and communicating with the first gap.
As a preferable technical scheme, a third sealing element is further arranged between the volute and the driving shaft, and the second sealing element is positioned between the first sealing element and the third sealing element; the second seal and the third seal have a second gap therebetween, and the first gap is located between the second gap and the impeller.
As a preferable technical scheme, a leakage pipeline is arranged on the volute, and the leakage pipeline penetrates through the volute and is communicated with the second gap.
As a preferable embodiment, a gear box is provided on one side of the scroll, and the drive shaft is an output shaft of the gear box.
As a preferred technical scheme, the volute is provided with a gas inlet matched with the impeller.
As a preferred technical scheme, a diffuser arranged around the impeller is arranged in the volute, and the diffuser is fixedly connected with the volute.
As a preferred embodiment, the first seal, the second seal and the third seal are all carbon ring seals.
As a preferred embodiment, the width of the first sealing member is larger than the width of the second sealing member, and the width of the second sealing member is larger than the width of the third sealing member.
As a preferable technical scheme, the collecting pipeline is connected with a leakage gas collecting tank, and the air pressure in the leakage gas collecting tank is lower than the compressed air pressure generated by the impeller.
As a preferred embodiment, the leakage pipe is in communication with the atmosphere.
The beneficial effects of the utility model are as follows:
1. A first sealing piece and a second sealing piece are arranged between a volute and a driving shaft, and a first gap is formed between the first sealing piece and the second sealing piece; when the compressor operates, a small amount of high-pressure medium gas in the volute leaks into the first gap through the gap between the first sealing element and the driving shaft under the action of pressure difference, and the leaked gas can be timely recovered by utilizing a collecting pipeline communicated with the first gap, so that the leakage gas quantity is effectively reduced, and the pollution degree to the environment is reduced.
2. The second gap is formed between the third sealing element and the second sealing element, and a small amount of leakage air in the first gap leaks into the second gap through the gap between the second sealing element and the driving shaft under the action of pressure difference, and a leakage pipeline communicated with the second gap can be used for directly discharging a small amount of leakage air in the part into the atmosphere, so that leakage of the leakage air near the compressor is avoided.
Drawings
FIG. 1 is a schematic view showing the overall structure of a first embodiment of a carbon dioxide compressor with a leaked gas recovery function according to the present utility model;
Fig. 2 is an enlarged view of the area a in fig. 1.
In the figure: 1-volute, 11-gas inlet, 12-diffuser, 2-impeller, 21-drive shaft, 31-first seal, 32-second seal, 33-third seal, 41-first gap, 42-collecting duct, 51-second gap, 52-leakage duct, 6-gearbox.
Detailed Description
The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
Referring to fig. 1 and 2, an embodiment of a carbon dioxide compressor with a recoverable leakage gas provided by the present utility model includes: a scroll 1, the scroll 1 being for collecting medium gas and leading out of the compressor; the impeller 2 is positioned in the volute 1, and the impeller 2 is driven by the driving shaft 21 to rotate at a high speed, so that the medium gas obtains speed energy and pressure energy, and the pressure of the medium gas is improved; a first seal 31 and a second seal 32 are provided in this order along the axial direction of the drive shaft 21 between the scroll 1 and the drive shaft 21; a first gap 41 is provided between the first seal 31 and the second seal 32; a collecting duct 42 passes through the scroll 1 and communicates with the first gap 41; when the compressor is in operation, a small amount of high-pressure medium gas in the volute 1 leaks into the first gap 41 through the gap between the first sealing element 31 and the driving shaft 21 under the action of pressure difference, and the leaked gas can be timely recovered by utilizing the collecting pipeline 42 communicated with the first gap 41, so that the leakage gas quantity is effectively reduced.
Referring to fig. 1, a gear box 6 is disposed at one side of the scroll 1, an output shaft of the gear box 6 forms a driving shaft 21, the driving shaft 21 passes through the scroll 1 and is connected with the impeller 2, and the impeller 2 can rotate at a high speed under the acceleration of the gear box 6; further, the volute 1 is provided with a gas inlet 11 matched with the impeller 2, and medium gas continuously enters the volute 1 through the gas inlet 11 and is discharged from the volute 1 after being pressurized by the impeller 2.
In this embodiment, referring to fig. 1 and 2, a third seal 33 is further disposed between the scroll 1 and the driving shaft 21, and the second seal 32 is located between the first seal 31 and the third seal 33; the second seal 32 and the third seal 33 have a second gap 51 therebetween, and the first gap 41 is located between the second gap 51 and the impeller 2; a leakage conduit 52 passes through the scroll 1 and communicates with the second gap 51; a very small amount of the leakage air in the first gap 41 leaks into the second gap 51 through the gap between the second seal 32 and the drive shaft 21 by the pressure difference, and the leakage air can be guided to the high altitude or discharged to a designated position by the leakage pipe 52 communicating with the second gap 51 without leaking to the vicinity of the compressor.
In this embodiment, referring to fig. 1 and 2, a diffuser 12 is disposed in the scroll 1 and surrounds the impeller 2, the diffuser 12 is fixedly connected with the scroll 1, and the diffuser 12 has a diffusion effect on the medium gas, so that the pressure of the medium gas can be further increased.
It should be noted that, the first sealing member 31, the second sealing member 32 and the third sealing member 33 are preferably carbocycle sealing, so that the application range of the carbocycle sealing in the carbon dioxide compressor is effectively widened; in other embodiments, the first seal 31, the second seal 32, and the third seal 33 may be labyrinth seals, mechanical seals, or dry gas seals, so as to effectively reduce leakage of the medium gas and improve economy.
In the present embodiment, referring to fig. 1 and 2, the width of the first sealing member 31 is larger than the width of the second sealing member 32; the width of the second seal 32 should be greater than the width of the third seal 33; increasing the width of the first sealing member 31 can effectively reduce the amount of leakage air entering the first gap 41, and improve the sealing effect; increasing the width of the second seal 32 may be effective to reduce the amount of leakage into the second gap 51; in actual production, the widths of the first seal 31, the second seal 32, and the third seal 33 are reasonably distributed on the sealing surface of the limited width between the scroll 1 and the drive shaft 21, so that the sealing effect can be further improved.
It should be noted that, the collecting pipe 42 should be connected with a leaking gas collecting tank, and the air pressure in the leaking gas collecting tank should be lower than the compressed air pressure generated by the impeller 2, so as to ensure that the leaking gas in the first gap 41 can enter the collecting pipe 42, and facilitate collection; further, the leakage pipe 52 should be in communication with the outside atmosphere, and the pressure in the leakage pipe 52 is the same as the outside atmosphere, so that the leakage air in the second gap 51 can be smoothly discharged to the outside.
In the present utility model, the medium gas is preferably carbon dioxide; the utility model is equally applicable when the medium gas is other non-toxic gas.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A carbon dioxide compressor with a recoverable leakage gas, comprising:
A scroll (1);
An impeller (2), the impeller (2) being located within the volute (1); the impeller (2) is connected with a driving shaft (21) for driving the impeller to rotate, and the driving shaft (21) penetrates through the volute (1); a first sealing element (31) and a second sealing element (32) are sequentially arranged between the volute (1) and the driving shaft (21) along the axial direction of the driving shaft (21); -a first gap (41) is provided between the first seal (31) and the second seal (32);
-a collecting duct (42), said collecting duct (42) passing through said volute (1) and communicating with said first gap (41).
2. A carbon dioxide compressor with recoverable leakage gas according to claim 1, wherein a third seal (33) is further provided between said scroll (1) and said drive shaft (21), said second seal (32) being located between said first seal (31) and said third seal (33); a second gap (51) is arranged between the second sealing element (32) and the third sealing element (33), and the first gap (41) is arranged between the second gap (51) and the impeller (2).
3. A carbon dioxide compressor with recoverable leakage gas according to claim 2, wherein said volute (1) is provided with a leakage conduit (52), said leakage conduit (52) passing through said volute (1) and communicating with said second gap (51).
4. A carbon dioxide compressor with recoverable leakage gas according to claim 1, wherein a gear box (6) is provided on one side of said scroll (1), said drive shaft (21) being provided as an output shaft of said gear box (6).
5. A leaked gas recoverable carbon dioxide compressor according to claim 1, wherein said volute (1) has a gas inlet (11) matching said impeller (2).
6. A carbon dioxide compressor with recoverable leakage gas according to claim 1 or 5, wherein said volute (1) has a diffuser (12) arranged around said impeller (2), said diffuser (12) being fixedly connected to said volute (1).
7. A leaked gas recoverable carbon dioxide compressor according to claim 3 wherein said first seal (31), said second seal (32) and said third seal (33) are all provided as carbon ring seals.
8. A leaked gas recoverable carbon dioxide compressor according to claim 3 or 7, wherein the width of said first seal (31) is greater than the width of said second seal (32), the width of said second seal (32) being greater than the width of said third seal (33).
9. A carbon dioxide compressor with recoverable leakage gas according to claim 1, wherein said collecting pipe (42) is connected to a leakage gas collecting tank, the gas pressure in said leakage gas collecting tank being lower than the compressed gas pressure generated by said impeller (2).
10. A leaked gas recoverable carbon dioxide compressor according to claim 3 wherein said leakage conduit (52) is in communication with the atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322387842.4U CN220828352U (en) | 2023-09-04 | 2023-09-04 | Carbon dioxide compressor with recyclable leakage gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322387842.4U CN220828352U (en) | 2023-09-04 | 2023-09-04 | Carbon dioxide compressor with recyclable leakage gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220828352U true CN220828352U (en) | 2024-04-23 |
Family
ID=90724233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322387842.4U Active CN220828352U (en) | 2023-09-04 | 2023-09-04 | Carbon dioxide compressor with recyclable leakage gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220828352U (en) |
-
2023
- 2023-09-04 CN CN202322387842.4U patent/CN220828352U/en active Active
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