CN114876865A - Supercritical carbon dioxide compressor impeller sealing structure and compressor - Google Patents
Supercritical carbon dioxide compressor impeller sealing structure and compressor Download PDFInfo
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- CN114876865A CN114876865A CN202210636670.7A CN202210636670A CN114876865A CN 114876865 A CN114876865 A CN 114876865A CN 202210636670 A CN202210636670 A CN 202210636670A CN 114876865 A CN114876865 A CN 114876865A
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- impeller
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- supercritical carbon
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000007789 sealing Methods 0.000 title claims abstract description 43
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 35
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 35
- 230000000694 effects Effects 0.000 description 5
- 239000000306 component Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 244000126211 Hericium coralloides Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the field of compressors and discloses a supercritical carbon dioxide compressor impeller sealing structure and a compressor, wherein the supercritical carbon dioxide compressor impeller sealing structure comprises an impeller, a casing and a back cavity sealing piece, the impeller comprises an impeller body and an impeller cover, and the impeller cover is arranged on one side of the impeller body; the casing is arranged on the outer side of the impeller cover, and one side of the casing, which is close to the impeller cover, is provided with casing grid teeth; the back cavity sealing piece is arranged on one side, far away from the impeller cover, of the impeller body, and a back cavity labyrinth is arranged on one side, close to the impeller body, of the back cavity sealing piece. According to the invention, the casing labyrinth is arranged in the casing, so that the working medium leakage in the sealed cavity of the casing can be reduced, and the back cavity labyrinth is arranged in the back cavity sealing part, so that the working medium leakage in the back cavity can be reduced, further, the working medium leakage of the impeller can be reduced, and the pneumatic efficiency of the supercritical carbon dioxide compressor can be improved.
Description
Technical Field
The invention relates to the field of compressors, in particular to a supercritical carbon dioxide compressor impeller sealing structure and a compressor.
Background
The supercritical carbon dioxide Brayton cycle power generation technology is a closed cycle power generation technology adopting supercritical carbon dioxide as a working medium, is a leading-edge technology which is rapidly developed in recent years, and is more and more favored by the international energy power industry because of the advantages of high cycle efficiency, wide power coverage, large power density, small vibration noise and the like.
The supercritical carbon dioxide compressor has the main function of improving the pressure of a working medium in the system, has great influence on the performance of the whole supercritical carbon dioxide Brayton cycle system and is a core component in the supercritical carbon dioxide Brayton cycle system. The supercritical carbon dioxide working medium has the characteristics of high pressure and high density, the size of the compressor can be greatly reduced by the characteristics, the structure of an impeller mechanical part is compact, and the energy density of a power device is favorably improved. However, the high pressure and high density characteristics also cause difficulties in impeller design, for example, the high density results in small impeller size, and leakage flow inside the impeller causes great secondary flow loss, thereby causing a sharp decrease in compressor operating efficiency.
Disclosure of Invention
The invention aims to provide a supercritical carbon dioxide compressor impeller sealing structure and a compressor, which can effectively reduce the working medium leakage of the impeller.
The technical scheme provided by the invention is as follows:
in one aspect, a sealing structure for an impeller of a supercritical carbon dioxide compressor is provided, which comprises:
the impeller comprises an impeller body and an impeller cover, wherein the impeller cover is arranged on one side of the impeller body;
the casing is arranged on the outer side of the impeller cover, and one side of the casing, which is close to the impeller cover, is provided with casing grid teeth;
the back cavity sealing piece is arranged on one side, away from the impeller cover, of the impeller body, and a back cavity labyrinth is arranged on one side, close to the impeller body, of the back cavity sealing piece.
In some embodiments, the impeller cover includes an axial portion extending axially along the impeller body and a radial portion extending radially along the impeller body, the axial portion is close to the working medium inlet of the impeller, the radial portion is close to the working medium outlet of the impeller, an outer surface of the axial portion is arc-shaped and is provided with stepped grates, and the stepped grates are matched with the casing grates.
In some embodiments, the outer surface of the radial portion is provided with a plurality of radial ribs, the radial ribs extend along the radial direction of the impeller cover, and the plurality of radial ribs are arranged at intervals along the circumferential direction of the radial portion.
In some embodiments, the thickness of the radial rib plate along the axial direction of the impeller body is 0.5-2.5 mm.
In some embodiments, the clearance between the top of the radial rib plate and the casing is greater than 0.15mm and less than 0.2 mm.
In some embodiments, the number of the radial rib plates is 6-12.
In some embodiments, the impeller body includes an impeller disk and a plurality of impeller blades spaced apart on one side of the impeller disk, the impeller cap being disposed on the impeller blades.
In some embodiments, the impeller disk includes an axially extending section for coupling with a compressor main shaft and a radially extending section for mounting the impeller blades, the outer surface of the axially extending section is planar, and the back cavity labyrinth is mated with the axially extending section.
In some embodiments, the back cavity seal extends out of the impeller along the radial direction of the impeller, the casing extends out of the impeller along the radial direction of the impeller, and a gap is formed between the back cavity seal and the casing to form a working medium outlet.
On the other hand, a compressor is further provided, and the compressor comprises the supercritical carbon dioxide compressor impeller sealing structure in any one of the above embodiments
The invention has the technical effects that:
(1) the casing is provided with the casing labyrinth, working medium leakage in a sealed cavity of the casing can be reduced, the back cavity sealing part is provided with the back cavity labyrinth, working medium leakage in the back cavity can be reduced, and further working medium leakage of the impeller is reduced, so that the pneumatic efficiency of the supercritical carbon dioxide compressor is improved.
(2) The impeller cover is provided with the radial rib plate which can rotate along with the impeller, so that the working medium leakage amount in the sealing cavity of the casing can be further reduced, and the axial thrust of the impeller can be adjusted, so that the safe and stable operation of the compressor can be ensured.
(3) The impeller cover is fixedly connected with the impeller blades in a welding mode, and working medium leakage flowing between the blade top gaps and the blade top gaps can be eliminated.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a longitudinal cross-sectional view of a supercritical carbon dioxide compressor impeller seal structure according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an impeller provided in an embodiment of the present application;
FIG. 3 is a longitudinal cross-sectional view of a barrel provided in accordance with an embodiment of the present application;
FIG. 4 is a longitudinal cross-sectional view of a back cavity seal provided in accordance with an embodiment of the present application.
The reference numbers illustrate:
10. an impeller; 11. an impeller body; 111. an impeller disc; 1111. an axially extending section; 1112. a radially extending section; 112. impeller blades; 12. an impeller cover; 121. an axial portion; 1211. step grate teeth; 122. a radial portion; 123. radial rib plates; 20. a case; 21. a casing comb tooth; 30. a back cavity seal; 31. back cavity comb teeth.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. Moreover, in the interest of brevity and understanding, only one of the components having the same structure or function is illustrated schematically or designated in some of the drawings. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In an embodiment of the present application, as shown in fig. 1, 3 and 4, an impeller sealing structure of a supercritical carbon dioxide compressor includes an impeller 10, a casing 20 and a back cavity sealing member 30, the impeller 10 includes an impeller body 11 and an impeller cover 12, and the impeller cover 12 is disposed on one side of the impeller body 11; the casing 20 is arranged outside the impeller cover 12, and one side of the casing 20 close to the impeller cover 12 is provided with a casing grid 21; the back cavity sealing piece 30 is arranged on one side, far away from the impeller cover 12, of the impeller body 11, and one side, close to the impeller body 11, of the back cavity sealing piece 30 is provided with a back cavity labyrinth 31.
In this embodiment, the impeller 10 is used to connect with a main shaft of a compressor to rotate the impeller 10, and when the compressor works, the impeller 10 is a rotating component, and the casing 20 and the back cavity sealing component 30 are stationary components. When the device works, a supercritical carbon dioxide working medium flows into the working medium inlet of the impeller 10, the rotating impeller 10 applies work to the flowing working medium, and the energy and the pressure of the working medium are improved. In order to ensure the normal rotation of the rotating part and avoid the collision and abrasion between the rotating part and the static part, a gap is formed between the rotating part and the static part, namely, a gap is formed between the impeller 10 and the casing 20 and between the impeller 10 and the back cavity sealing part 30, so that working medium leakage can exist between the rotating part and the static part.
As shown in fig. 1, a working medium enters the impeller 10 from a working medium inlet of the impeller 10, after the impeller 10 applies work to the working medium, at a working medium outlet of the impeller 10, a part of the working medium leaks through a gap between the casing 20 and the impeller 10 and returns to an inlet of the compressor, and the other part of the working medium leaks to the outside of the compressor through a gap between the back cavity sealing member 30 and the impeller 10.
The grid is formed by connecting a plurality of grid sections in series one by one, and the working medium generates pressure drop through one grid section, so that the flow is small, and the leakage of the working medium is reduced. In the embodiment, the casing labyrinth 21 is arranged on one side of the casing 20 close to the impeller cover 12, so that the working medium leakage amount in the sealed cavity of the casing 20 can be reduced, and the back cavity labyrinth 31 is arranged on one side of the back cavity sealing part 30 close to the impeller body 11, so that the working medium leakage amount in the back cavity sealed cavity can be reduced, and the pneumatic efficiency of the supercritical carbon dioxide compressor is improved.
As shown in fig. 2, impeller body 11 includes an impeller disk 111 and a plurality of impeller blades 112, wherein impeller blades 112 are spaced apart from each other on one side of impeller disk 111, and impeller cover 12 covers impeller blades 112. Impeller cover 12 can be fixedly connected with impeller blades 112 by means of brazing, and by arranging impeller cover 12 on impeller blades 112, the top clearance of impeller blades 112 can be eliminated, so that working medium leakage flow of the top clearance is eliminated.
The impeller disc 111 comprises an axial extension 1111 for connecting with the main shaft of the compressor and a radial extension 1112 for mounting the impeller blades 112, the outer surface of the axial extension 1111 is a plane, and the back cavity labyrinth 31 is matched with the axial extension 1111. Because the axial extension section 1111 is a plane, the back cavity grate 31 can be directly matched with the axial extension section 1111 to reduce the leakage amount of the working medium.
As shown in fig. 1, the back cavity sealing member 30 extends to the outside of the impeller 10 along the radial direction of the impeller 10, the casing 20 extends to the outside of the impeller 10 along the radial direction of the impeller 10, and a gap is formed between the back cavity sealing member 30 and the casing 20 to form a working medium outlet.
In some embodiments, as shown in fig. 2, the impeller cover 12 includes an axial portion 121 extending axially along the impeller body 11 and a radial portion 122 extending radially along the impeller body 11, the axial portion 121 is close to the working medium inlet of the impeller 10, the radial portion 122 is close to the working medium outlet of the impeller 10, the outer surface of the axial portion 121 is arc-shaped and is provided with a stepped grate 1211, and the stepped grate 1211 is matched with the casing grate 21.
As shown in fig. 1, axial portion 121 of impeller cover 12 cooperates with axial portion of impeller disc 111 to form a working fluid inlet of impeller 10, radial portion 122 of impeller cover 12 is fixedly connected to impeller blades 112, impeller cover 12 rotates with impeller blades 112 to eliminate tip clearance, and radial portion 122 of impeller cover 12 cooperates with radial extension 1112 of impeller disc 111 to form a working fluid outlet of impeller 10.
The casing grid 21 is matched with the axial part 121 of the impeller cover 12, the outer surface of the axial part 121 of the impeller cover 12 is arc-shaped, and the sealing effect of the casing grid 21 is reduced when the clearance is too large when the casing grid 21 is matched with the arc-shaped surface, so that the outer surface of the axial part 121 is provided with a stepped grid 1211, each step of the stepped grid 1211 is matched with each grid tooth sheet of the casing grid 21, the sealing effect is better after the casing grid 21 is matched with the stepped grid 1211, and the working medium leakage amount is reduced.
Preferably, as shown in fig. 2, a plurality of radial ribs 123 are provided on the outer surface of the radial portion 122, the radial ribs 123 extend in the radial direction of the impeller cover 12, and the plurality of radial ribs 123 are spaced apart in the circumferential direction of the radial portion 122.
The supercritical carbon dioxide working medium has the characteristics of high pressure and high density, the axial thrust acting on the impeller of the supercritical carbon dioxide compressor is very large due to the characteristic of high pressure, and the overlarge axial thrust has great threat to the safe and stable operation of the compressor. Therefore, the supercritical carbon dioxide compressor impeller not only has the problem of large leakage amount of the working medium in the impeller 10, but also has the problems of large axial force and difficulty in balancing of the impeller 10, and the safe and stable operation of the compressor is influenced.
In the embodiment, the radial rib plates 123 are arranged on the radial part 122 of the impeller cover 12, so that the pressure distribution in the sealed cavity of the casing 20 can be changed, and the effect of adjusting the axial thrust of the impeller 10 is achieved. The working principle of the radial rib plate 123 is that after the high-pressure airflow at the working medium outlet of the impeller 10 enters the gap between the casing 20 and the impeller 10, the radial rib plate 123 rotates at a high speed, and the action of the radial rib plate 123 is similar to that of the impeller blade 112, so that the airflow in the gap between the casing 20 and the impeller 10 can be thrown outwards under the action of centrifugal force, thereby preventing the high-pressure airflow from leaking to the working medium inlet of the impeller 10 through the sealed gap of the casing 20 to a certain extent, and finally achieving the purpose of reducing the leakage amount. In addition, because the radial rib plate 123 rotating at a high speed does work on the air flow entering the sealed gap of the casing 20, the high-pressure air flow at the working medium outlet of the impeller 10 is difficult to enter the sealed gap of the casing 20, so that the pressure in the sealed gap of the casing 20 is reduced, the axial force borne by the surface of the casing 20 is reduced, the pressure distribution in the sealed cavity of the casing 20 is changed, and the action of adjusting the axial force of the impeller 10 is realized.
According to calculation of a certain CFD (fluid dynamics software for short), under the condition that other structures and calculation boundary conditions are the same, the radial rib plate 123 with the height (thickness) of 0.5mm is added, the leakage flow passing through the sealed gap of the casing 20 is reduced by 28%, the reduction amount of the leakage flow of the gap is considerable, the axial thrust borne by the surface of the casing 20 is reduced to 60200N from original 64790N, and the reduction amplitude reaches 4570N, so that the axial resultant force borne by the centrifugal impeller 10 is favorably reduced, and the safe operation of the rotor is better ensured.
When the axial thickness of the radial rib plate 123 along the impeller body 11 is 0.5-2.5 mm according to a certain CFD (fluid mechanics software for short) simulation calculation, the working medium leakage amount and the axial thrust resultant force are both reduced, the energy consumption cannot be excessively increased, and the comprehensive effect of the compressor is high. If the thickness of the radial rib plate 123 is too large, more electricity is consumed, and the efficiency of the compressor is affected.
Preferably, the gap between the top of the radial rib plate 123 and the casing 20 is greater than 0.15mm and less than 0.2mm, the gap between the top of the radial rib plate 123 and the casing 20 is too small, which may cause the radial rib plate 123 and the casing 20 to rub against each other, the gap is too large, which may cause the working medium leakage to increase, and when the gap between the top of the radial rib plate 123 and the casing 20 is greater than 0.15mm and less than 0.2mm, the radial rib plate 123 and the casing 20 may neither rub against each other nor cause the leakage to increase. In addition, when the number of the radial rib plates 123 is 6-12, the whole rotor is stable in operation.
The invention further provides an embodiment of a compressor, which comprises the impeller sealing structure of the supercritical carbon dioxide compressor in any embodiment. The supercritical carbon dioxide compressor impeller sealing structure can effectively reduce the working medium leakage amount, thereby improving the pneumatic efficiency of the compressor, simultaneously reducing the axial resultant force on the compressor impeller to a certain extent, and reducing the operation risk caused by overlarge axial force in the operation process of the compressor.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A supercritical carbon dioxide compressor impeller sealing structure is characterized by comprising:
the impeller comprises an impeller body and an impeller cover, wherein the impeller cover is arranged on one side of the impeller body;
the casing is arranged on the outer side of the impeller cover, and one side of the casing, which is close to the impeller cover, is provided with casing grid teeth;
the back cavity sealing piece is arranged on one side, away from the impeller cover, of the impeller body, and a back cavity labyrinth is arranged on one side, close to the impeller body, of the back cavity sealing piece.
2. The supercritical carbon dioxide compressor impeller sealing structure according to claim 1, wherein the impeller cover comprises an axial portion extending along the axial direction of the impeller body and a radial portion extending along the radial direction of the impeller body, the axial portion is close to a working medium inlet of the impeller, the radial portion is close to a working medium outlet of the impeller, the outer surface of the axial portion is arc-shaped and is provided with stepped grates, and the stepped grates are matched with the casing grates.
3. The supercritical carbon dioxide compressor impeller sealing structure according to claim 2, wherein a plurality of radial ribs are arranged on the outer surface of the radial portion, the radial ribs extend in the radial direction of the impeller cover, and the plurality of radial ribs are arranged at intervals in the circumferential direction of the radial portion.
4. The sealing structure of the impeller of the supercritical carbon dioxide compressor according to claim 3, wherein the thickness of the radial rib plate along the axial direction of the impeller body is 0.5-2.5 mm.
5. The supercritical carbon dioxide compressor impeller sealing structure according to claim 3, wherein the gap between the top of the radial rib plate and the casing is greater than 0.15mm and less than 0.2 mm.
6. The sealing structure of the supercritical carbon dioxide compressor impeller according to claim 3, wherein the number of the radial rib plates is 6-12.
7. The supercritical carbon dioxide compressor impeller sealing structure according to claim 1, wherein the impeller body comprises an impeller disc and a plurality of impeller blades, the impeller blades are arranged on one side of the impeller disc at intervals, and the impeller cover is arranged on the impeller blades.
8. The supercritical carbon dioxide compressor impeller sealing structure according to claim 7, wherein the impeller disc comprises an axially extending section for connecting with a compressor spindle and a radially extending section for mounting the impeller blade, the outer surface of the axially extending section is a plane, and the back cavity labyrinth is matched with the axially extending section.
9. The supercritical carbon dioxide compressor impeller sealing structure according to claim 1, wherein the back cavity sealing member extends out of the impeller in a radial direction of the impeller, the casing extends out of the impeller in the radial direction of the impeller, and a gap is formed between the back cavity sealing member and the casing to form a working medium outlet.
10. A compressor comprising the supercritical carbon dioxide compressor wheel seal structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210636670.7A CN114876865A (en) | 2022-06-07 | 2022-06-07 | Supercritical carbon dioxide compressor impeller sealing structure and compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210636670.7A CN114876865A (en) | 2022-06-07 | 2022-06-07 | Supercritical carbon dioxide compressor impeller sealing structure and compressor |
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| CN202210636670.7A Pending CN114876865A (en) | 2022-06-07 | 2022-06-07 | Supercritical carbon dioxide compressor impeller sealing structure and compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115559788A (en) * | 2022-12-01 | 2023-01-03 | 中国核动力研究设计院 | Supercritical carbon dioxide turbine |
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| US7775763B1 (en) * | 2007-06-21 | 2010-08-17 | Florida Turbine Technologies, Inc. | Centrifugal pump with rotor thrust balancing seal |
| US20170314576A1 (en) * | 2014-11-10 | 2017-11-02 | Siemens Aktiengesellschaft | Method for creating an impeller of a radial turbo fluid energy machine, and stage |
| KR20160059731A (en) * | 2014-11-19 | 2016-05-27 | 한국에너지기술연구원 | Turbomachinery for supercritical high density working fluid |
| CN208578769U (en) * | 2018-05-31 | 2019-03-05 | 西门子股份公司 | Impeller and centrifugal compressor including this impeller |
| KR20210150025A (en) * | 2020-06-03 | 2021-12-10 | (주) 진솔터보기계 | Labyrinth Seal Leakage Reduction Measures |
| CN112392760A (en) * | 2020-11-27 | 2021-02-23 | 珠海格力电器股份有限公司 | Flow passage sealing structure of compressor and refrigeration equipment |
| CN215444509U (en) * | 2021-04-14 | 2022-01-07 | 哈电发电设备国家工程研究中心有限公司 | Compressor impeller seal structure suitable for supercritical carbon dioxide |
| CN113669268A (en) * | 2021-08-18 | 2021-11-19 | 苏州欧拉透平机械有限公司 | Expansion and compression integrated machine for Brayton cycle system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115559788A (en) * | 2022-12-01 | 2023-01-03 | 中国核动力研究设计院 | Supercritical carbon dioxide turbine |
| CN115559788B (en) * | 2022-12-01 | 2023-03-14 | 中国核动力研究设计院 | Supercritical carbon dioxide turbine |
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