CN109869329A - Sealing system is classified between a kind of multistage centrifugal compressor grade - Google Patents
Sealing system is classified between a kind of multistage centrifugal compressor grade Download PDFInfo
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- CN109869329A CN109869329A CN201910192235.8A CN201910192235A CN109869329A CN 109869329 A CN109869329 A CN 109869329A CN 201910192235 A CN201910192235 A CN 201910192235A CN 109869329 A CN109869329 A CN 109869329A
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Abstract
The present invention relates to be classified sealing system between a kind of multistage centrifugal compressor grade, the system includes shaft, sealing comb teeth, sealing matrix and sealant, the sealing comb teeth is set to the shaft upper surface, the sealant is set to the sealing matrix lower surface, the sealant and sealing comb teeth closure are sealed, it is characterized in that, the sealant includes balance hub sealant and/or low-pressure stage sealant, the balance hub sealant is honeycomb type sealing structure, is sealed after inflating in the honeycomb type sealing structure.
Description
Background technique
The invention belongs to compressor seal technical fields, and in particular to sealing is classified between a kind of multistage centrifugal compressor grade
System.
Technical background
Iron and steel enterprise is an energy consumption property enterprise, and energy-output ratio accounts for the 16% of national energy total energy consumption, accounts for the Ministry of Industry
The 23% of door total energy consumption, energy consumption cost accounts for enterprise's production cost about 25%, and the coal gas generated in steel production is even more
The 30-40% for accounting for the entire energy is the important secondary energy sources of iron and steel enterprise.How to reduce energy consumption, improve Integrated Energy benefit
It will be one of the key factor that iron and steel enterprise increases economic efficiency with rate.CCPP is as the main secondary energy sources of iron and steel enterprise
The energy saver efficiently utilized, the generating efficiency and operation ratio of generating set have weight to the secondary use of iron and steel enterprise's energy
Big meaning.
Compressor compresses are the important components of CCPP unit, and compression efficiency determines CCPP unit to a certain extent
Generating efficiency improves multistage centrifugal compressor leakage efficiency, and reducing the amount of leakage between compression process middle rank and grade is to improve
Compressor efficiency is most direct, most effective method.Account for about compressor according to the power loss that counting statistics interstage seal is revealed always to move
The 3% of power, therefore reasonable interstage sealing structure and seal coating to raising CCPP efficiency of generating unit and realize energy-saving and emission-reduction
It is of great significance.Currently, multistage centrifugal compressor interstage seal mainly use in the abradable seal coating structure of low temperature it is close
Envelope, since multistage centrifugal compressor is applied to iron and steel enterprise CCPP more, and in practical application existing structure abradable sealing
Coating structure is no longer satisfied unit operation demand, seriously affects the operation of unit safety efficient stable.
CCPP main fuel is blast furnace, the coke-stove gas of by-product, contains the pollutants such as a large amount of tar, naphthalene, benzene in coal gas,
The pollutant of compression process high temperature high pressure easily corrodes seal coating and sealant corrosion failure is caused to fail；In compressed media
Erosion seal coating causes interstage seal coating damage to fail in a large amount of solid particle operations；Multistage centrifugal compressor was run
When surge effect occurs due to centrifugal force effect and unit in journey, interstage seal coating often collides with shaft and causes
Interstage seal coating damage falls off, so that grade and interstage seal air gap increase, a large amount of compressed medias pass through gap from high pressure effluent
To low-pressure side lead to grade between gas blowby；That there are bond strengths is inadequate for the abradable coating sealing of existing structure at present, and unit operation is opened
In dynamic or stopped process, since seal coating matrix (metal material) and coating material (composite material) are poor on heating conduction
Different, frequent starting stops so that thermal stress concentrates release that seal coating and matrix is caused to fall off failure in coating；It is multistage simultaneously
Centrifugal compressor high-voltage end balance hub axle envelope generally uses higher dry gas seals (the usually nitrogen of pressure (6.0MPa) grade
Gas) a large amount of compressed media leakage contribution production safeties in compression process are prevented, and existing abradable coating sealing combines by force at present
Operation demand is not able to satisfy on degree and erosion resistance, therefore is badly in need of studying a kind of new structural interstage sealing device, it is high
Pressure side balance hub has higher bond strength and sealing performance, and the sealing of low-pressure stage coating has certain wear-resistant, anticorrosive, anti-
The composite construction sealing device of thermal shock function, while also needing to have certain recoverable spring function and avoiding sealing device and turn
When scraping collision occurs for son, neither damaging rotor, and can rapidly restore original form, it can be ensured that the efficient sealed property of interstage seal
Can fail service life with resisting breakage.
Through retrieving, patent " a kind of method of preparing seal coating by plasma spraying, application number 200910011931.0 ",
" a method of erosion resistance high-temperature abradable seal coating is prepared based on thermal spraying, application number: 201310045723.9 ", " one
Kind high-temperature abradable seal coating, application number: 200910272123.X " not can solve seal clearance after sealing comb teeth abrasion
Increase easy peeling Problem of Failure low with coating adhesion；Patent " a kind of preparation method of the seal coating of highly resistance spalling failure, Shen
Please number 201410785439.X ", have limitation improve only seal coating anti-strip failure performance, not can solve sealing comb teeth
Sealing comb teeth what state guarantee sealing effect is being changed without after abrasion.
Summary of the invention
In view of the above problems, the present invention is proposed, overcome the above problem in order to provide one kind or at least is partially solved
Sealing system is classified between the multistage centrifugal compressor grade of the above problem.
The embodiment of the present invention is classified sealing system between providing a kind of multistage centrifugal compressor grade, and the system comprises turn
Axis, sealing comb teeth, sealing matrix and sealant, the sealing comb teeth are set to the shaft upper surface, the sealant setting
In the sealing matrix lower surface, the sealant and sealing comb teeth closure are sealed, the sealant includes flat
Weigh hub sealant and/or low-pressure stage sealant, and the balance hub sealant is honeycomb type sealing structure, the low-pressure stage sealant
For seal coating, it is sealed after being inflated in the honeycomb type sealing structure, after being inflated in the honeycomb type sealing structure
It is sealed.
Further, the honeycomb type sealing structure is made by the Ni-based high-temperature alloy light sheet material of Hai Site, including bee
Nest core, bottom plate and side panel, the cellular-core are multiple regular hexagon honeycomb core lattice, and the honeycomb core lattice diagonal line length is
0.8-6mm, core lattice depth be 1.6-6mm, core lattice wall thickness be 0.05mm-0.1mm, the bottom plate and the side panel with a thickness of
0.05-0.20mm；The gas of the inflation includes ().
Further, the low-pressure stage sealant is seal coating, and the seal coating includes the sealing bottom set gradually
Layer and sealing surface layer.
Further, the sealing bottom is nickel aluminium powder spray coating, and the sealing surface layer is aluminium silicon polybenzoate spray coating.
Further, by mass percentage, the material component of the nickel aluminium powder spray coating includes: 85-95% nickel aluminium powder
With 5-15% molybdenum.
Further, in the nickel aluminium powder, Ni mass percentage content is 80-90%, and Al mass percentage content is 10-
20%.
Further, the nickel aluminium powder spray coating uses plasma spraying, complete to the nickel aluminium powder in the spraying process
It after running down, is reacted with the anti-strip abnormity matrix, forms micro metallurgic bonding, enhance bond strength, spraying temperature 638-
720℃。
Further, the aluminium silicon polybenzoate spray coating uses plasma spraying, and by mass percentage, the aluminium silicon is poly-
The material component of phenyl ester spray coating includes: 40-60%Al and 15-25%Si and 10-20%Mo.
Further, the sealing matrix includes balance hub sealing matrix and/or low-pressure stage sealing matrix, the low-pressure stage
Sealing matrix is anti-strip abnormity matrix, and multiple protrusions and multiple indents are distributed on the anti-strip abnormity matrix.
Further, the protrusion and the indent interlaced arrangement, the protrusion and the indent are tooth form.
One or more technical solutions in the embodiment of the present invention, have at least the following technical effects or advantages:
Classification sealing system provided by the invention takes the hiigh pressure stage balance hub and low-pressure stage of multistage centrifugal compressor
Classification sealing, solves in non-graded seal process, because force way is different between hiigh pressure stage balance hub and low-pressure stage, causes between grade
The problem of leakproofness and sealant stability difference.Further, the sealant of hiigh pressure stage balance hub uses the honeycomb of metal material
Formula sealing efficiently prevents medium from flowing outward, improves the stabilization of rotor if can form arterial highway gas curtain with cellular band in shaft
Property and reduce gas leakage rate, realize it is efficient sealed, meanwhile, metal material honeycomb seal by high pressure weld be embedded in matrix
On, knot and intensity are big, can satisfy unit operation demand.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of balance hub sealing device in the embodiment of the present invention；
Wherein, the 1, first sealing matrix, the 2, first sealant, 3, first rotating shaft.
Fig. 2 is the structural schematic diagram of mesolow grade sealing device of the embodiment of the present invention；
Wherein, the 4, second sealing matrix, 5, sealing bottom, 6, sealing surface layer, the 7, second shaft.
Fig. 3 is the inner surface transformation front and back comparison of multistage centrifugal compressor interstage seal balance hub sealing device
Figure.
Specific embodiment
Below in conjunction with specific embodiment and embodiment, it is specifically described the present invention, advantages of the present invention and various effects
It thus will clearly present.It will be understood by those skilled in the art that these specific embodiments and embodiment are for illustrating
The present invention is not intended to limit the present invention.
Throughout the specification, unless otherwise specified, terms used herein are interpreted as usual in this field
Used meaning.Therefore, unless otherwise defined, all technical and scientific terms used herein has leads with belonging to the present invention
The identical meaning of the general understanding of field technique personnel.Contradiction if it exists, this specification are preferential.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention, can pass through
Market is commercially available or can be prepared by existing method.
The application is classified sealing system between providing a kind of multistage centrifugal compressor grade, and the system comprises shafts, sealing
Comb teeth, sealing matrix and sealant, the sealing comb teeth are set to the shaft upper surface, and the sealant is set to described close
Matrix lower surface is sealed, the sealant and sealing comb teeth closure are sealed, the sealant includes balance hub sealing
Layer and/or low-pressure stage sealant, the balance hub sealant are honeycomb type sealing structure, and the low-pressure stage sealant is that sealing applies
Layer is sealed after inflating in the honeycomb type sealing structure.
In the application, the honeycomb type sealing structure is made by the Ni-based high-temperature alloy light sheet material of Hai Site, including bee
Nest core, bottom plate and side panel, the cellular-core are multiple regular hexagon honeycomb core lattice, and the honeycomb core lattice diagonal line length is
0.8-6mm, core lattice depth be 1.6-6mm, core lattice wall thickness be 0.05mm-0.1mm, the bottom plate and the side panel with a thickness of
0.05-0.20mm；The gas of the inflation includes ().
In the application, the low-pressure stage sealant is seal coating, and the seal coating includes the sealing bottom set gradually
Layer and sealing surface layer.
Preferably, the sealing bottom is nickel aluminium powder spray coating, and the sealing surface layer is aluminium silicon polybenzoate spray coating.
Preferably, by mass percentage, the material component of the nickel aluminium powder spray coating include: 85-95% nickel aluminium powder and
5-15% molybdenum.
Preferably, in the nickel aluminium powder, Ni mass percentage content is 80-90%, and Al mass percentage content is 10-
20%.
Preferably, the nickel aluminium powder spray coating uses plasma spraying, complete to the nickel aluminium powder in the spraying process
It after fusing, is reacted with the anti-strip abnormity matrix, forms micro metallurgic bonding, enhance bond strength, spraying temperature 638-720
℃。
Preferably, the aluminium silicon polybenzoate spray coating uses plasma spraying, by mass percentage, the aluminium silicon polyphenyl
The material component of ester spray coating includes: 40-60%Al and 15-25%Si and 10-20%Mo.
In the application, the sealing matrix includes balance hub sealing matrix and/or low-pressure stage sealing matrix, the low-pressure stage
Sealing matrix is anti-strip abnormity matrix, and multiple protrusions and multiple indents are distributed on the anti-strip abnormity matrix.
Preferably, the protrusion and the indent interlaced arrangement, the protrusion and the indent are tooth form.
Embodiment 1
The application is classified sealing system between providing a kind of multistage centrifugal compressor grade, and the system comprises shafts, sealing
Comb teeth, sealing matrix and sealant, the sealing comb teeth are set to the shaft upper surface, and the sealant is set to described close
Matrix lower surface is sealed, the sealant and sealing comb teeth closure are sealed, the sealant includes balance hub sealing
Layer and/or low-pressure stage sealant, the balance hub sealant are honeycomb type sealing structure, and the low-pressure stage sealant is that sealing applies
Layer is sealed after inflating in the honeycomb type sealing structure.
Wherein, the honeycomb type sealing structure is made by the Ni-based high-temperature alloy light sheet material of Hai Site, including honeycomb core
Body, bottom plate and side panel, the cellular-core are multiple regular hexagon honeycomb core lattice, and the honeycomb core lattice diagonal line length is 4mm,
Core lattice depth is 4mm, and core lattice wall thickness is 0.05mm, and the bottom plate and the side panel are with a thickness of 0.13mm；The gas of the inflation
Body includes ().
Wherein, the low-pressure stage sealant is seal coating, the seal coating include the sealing bottom that sets gradually and
Seal surface layer.
Wherein, the sealing bottom is nickel aluminium powder spray coating, and the sealing surface layer is aluminium silicon polybenzoate spray coating.
Wherein, by mass percentage, the material component of the nickel aluminium powder spray coating includes: 90% nickel aluminium powder and 10% molybdenum
Metal.
Wherein, in the nickel aluminium powder, Ni mass percentage content is that 85%, Al mass percentage content is 15%.
Wherein, the nickel aluminium powder spray coating uses plasma spraying, and spraying temperature is 680 DEG C.
Wherein, the aluminium silicon polybenzoate spray coating uses plasma spraying, by mass percentage, the aluminium silicon polybenzoate
The material component of spray coating includes: 50%Al and 20%Si and 15%Mo.
Wherein, the second sealing matrix is anti-strip abnormity matrix, is distributed on the anti-strip abnormity matrix multiple
Raised and multiple indents, for fixing the sealant.
Wherein, the protrusion and the indent interlaced arrangement, the protrusion and the indent are tooth form.
Embodiment 2
The application is classified sealing system between providing a kind of multistage centrifugal compressor grade, and the system comprises shafts, sealing
Comb teeth, sealing matrix and sealant, the sealing comb teeth are set to the shaft upper surface, and the sealant is set to described close
Matrix lower surface is sealed, the sealant and sealing comb teeth closure are sealed, the sealant includes balance hub sealing
Layer and/or low-pressure stage sealant, the balance hub sealant are honeycomb type sealing structure, and the low-pressure stage sealant is that sealing applies
Layer is sealed after inflating in the honeycomb type sealing structure.
Wherein, the honeycomb type sealing structure is made by the Ni-based high-temperature alloy light sheet material of Hai Site, including honeycomb core
Body, bottom plate and side panel, the cellular-core are multiple regular hexagon honeycomb core lattice, and the honeycomb core lattice diagonal line length is
0.8mm, core lattice depth are 1.6mm, and core lattice wall thickness is 0.05mm, and the bottom plate and the side panel are with a thickness of 0.05mm；It is described
The gas of inflation includes ().
Wherein, the low-pressure stage sealant is seal coating, the seal coating include the sealing bottom that sets gradually and
Seal surface layer.
Wherein, the sealing bottom is nickel aluminium powder spray coating, and the sealing surface layer is aluminium silicon polybenzoate spray coating.
Wherein, by mass percentage, the material component of the nickel aluminium powder spray coating includes: 85% nickel aluminium powder and 5% molybdenum
Metal, in the nickel aluminium powder, Ni mass percentage content is that 80%, Al mass percentage content is 10%.
Wherein, the nickel aluminium powder spray coating uses plasma spraying, and spraying temperature is 638 DEG C.
Wherein, the aluminium silicon polybenzoate spray coating uses plasma spraying, by mass percentage, the aluminium silicon polybenzoate
The material component of spray coating includes: 40%Al and 15%Si and 10%Mo.
Wherein, the second sealing matrix is anti-strip abnormity matrix, is distributed on the anti-strip abnormity matrix multiple
Raised and multiple indents, for fixing the sealant.
Wherein, the protrusion and the indent interlaced arrangement, the protrusion and the indent are tooth form.
Embodiment 3
The application is classified sealing system between providing a kind of multistage centrifugal compressor grade, and the system comprises shafts, sealing
Comb teeth, sealing matrix and sealant, the sealing comb teeth are set to the shaft upper surface, and the sealant is set to described close
Matrix lower surface is sealed, the sealant and sealing comb teeth closure are sealed, the sealant includes balance hub sealing
Layer and/or low-pressure stage sealant, the balance hub sealant are honeycomb type sealing structure, and the low-pressure stage sealant is that sealing applies
Layer is sealed after inflating in the honeycomb type sealing structure.
Wherein, the honeycomb type sealing structure is made by the Ni-based high-temperature alloy light sheet material of Hai Site, including honeycomb core
Body, bottom plate and side panel, the cellular-core are multiple regular hexagon honeycomb core lattice, and the honeycomb core lattice diagonal line length is 6mm,
Core lattice depth is 6mm, and core lattice wall thickness is 0.1mm, and the bottom plate and the side panel are with a thickness of 0.2mm；The gas of the inflation
Including ().
Wherein, the low-pressure stage sealant is seal coating, the seal coating include the sealing bottom that sets gradually and
Seal surface layer.
Wherein, the sealing bottom is nickel aluminium powder spray coating, and the sealing surface layer is aluminium silicon polybenzoate spray coating.
Wherein, by mass percentage, the material component of the nickel aluminium powder spray coating includes: 95% nickel aluminium powder and 15% molybdenum
Metal.
Wherein, in the nickel aluminium powder, Ni mass percentage content is that 90%, Al mass percentage content is 20%.
Wherein, the nickel aluminium powder spray coating uses plasma spraying, and spraying temperature is 720 DEG C.
Wherein, the aluminium silicon polybenzoate spray coating uses plasma spraying, by mass percentage, the aluminium silicon polybenzoate
The material component of spray coating includes: 60%Al and 25%Si and 20%Mo.
Wherein, the second sealing matrix is anti-strip abnormity matrix, is distributed on the anti-strip abnormity matrix multiple
Raised and multiple indents, for fixing the sealant.
Wherein, the protrusion and the indent interlaced arrangement, the protrusion and the indent are tooth form.
Comparative example 1
Except hiigh pressure stage balance hub and low-pressure stage are all made of coating sealing, remaining is same as Example 1.
Comparative example 2
Except the first sealant inner surface be in Fig. 3 a) shown in addition to structure, remaining is same as Example 1.
Comparative example 3
In addition to the material of nickel aluminium powder spray coating is without containing molybdenum, remaining is same as Example 1.
Comparative example 4
In addition to the second sealing matrix does not have protrusion and concave inward structure, remaining is same as Example 1.
To between multistage centrifugal compressor grade made from 1-3 of the embodiment of the present invention and comparative example 1-4 be classified sealing system into
Row sealing performance and anti-strip mechanics properties testing, testing result are as shown in table 1.
Table 1
As can be seen from Table 1, the present invention is using classification sealing, by using classification sealing to hiigh pressure stage balance hub and low-pressure stage
Mode, and by the improvement of sealing structure and sealed coating material to balance hub sealing device and low-pressure stage sealing device, it mentions
The high sealing performance of hiigh pressure stage balance hub and the antistrip performance of low-pressure stage seal coating.
Compared with existing multistage centrifugal compressor interstage seal, it is classified between the multistage centrifugal compressor grade of the application close
Envelope has the following characteristics that
1, the sealing of hiigh pressure stage balance hub can be realized efficient sealed using metal material, however metal is easily reacted with coal gas, is made
At explosion, the application use the Ni-based high-temperature alloy light sheet material of Hai Site, and by honeycomb core lattice size, core lattice wall thickness, bottom/
The setting of the parameters such as side plate thickness effectively avoids the generation of explosion.
2, in the application, high-voltage end honeycomb seal layer uses the very thin Ni-based high-temperature alloy light sheet material of Hai Site, firmly
Very low, will not to be in contact to it any steel object generation abrasion is spent, injury will not be generated to axis；Honeycomb sealing gland has dehumidifying
Effect, can effective adsorption moisture, achieve the effect that automatic dehumidifying, protection to blade and reduce moisture loss advantageously.
3, low-pressure stage of the invention sealing coats nickel by using the better aluminium of covering property, and is added in coating material
A small amount of molybdenum can make coating that exothermic reaction more fully occur in plasma spraying, form bond strength more with matrix
Good micro metallurgic bonding, can be enhanced the antistrip performance of seal coating.
4, low-pressure stage of the invention sealing improves the creep properties of seal coating, energy by the improvement to sealing layer material
Impeller and the mutual damaged in collision impeller of coating effectively are prevented, reduces the breakage rate of impeller, prolongs its service life.
5, the present invention to its sealing structure and sealed coating material by carrying out multistage centrifugal compressor by classification
It improves, improves the sealing performance of hiigh pressure stage balance hub, reduce the generation of low-pressure stage seal coating spalling failure, to improve more
Grade centrifugal compressor production efficiency and operation ratio, improve the generated energy of CCCP generating set, while reducing a large amount of by-product
Coal gas diffusion, with good economic efficiency and social benefit.
Finally, it is to be noted that, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. being classified sealing system between a kind of multistage centrifugal compressor grade, the system comprises shaft, sealing comb teeth, sealing matrixes
And sealant, the sealing comb teeth are set to the shaft upper surface, the sealant is set to the sealing matrix lower surface,
The sealant and sealing comb teeth closure are sealed, which is characterized in that the sealant includes balance hub sealant
And/or low-pressure stage sealant, the balance hub sealant are honeycomb type sealing structure.
2. being classified sealing system between multistage centrifugal compressor grade according to claim 1, which is characterized in that the honeycomb
Formula sealing structure is made by the Ni-based high-temperature alloy light sheet material of Hai Site, including cellular-core, bottom plate and side panel, the bee
Nest core is multiple regular hexagon honeycomb core lattice, and the honeycomb core lattice diagonal line length is 0.8-6mm, and core lattice depth is 1.6-6mm,
Core lattice wall thickness is 0.05mm-0.1mm, and the bottom plate and the side panel are with a thickness of 0.05-0.20mm.
3. being classified sealing system between multistage centrifugal compressor grade according to claim 1, which is characterized in that the low pressure
Grade sealant is seal coating, and the seal coating includes the sealing bottom set gradually and sealing surface layer.
4. being classified sealing system between multistage centrifugal compressor grade according to claim 3, which is characterized in that the sealing
Bottom is nickel aluminium powder spray coating, and the sealing surface layer is aluminium silicon polybenzoate spray coating.
5. being classified sealing system between multistage centrifugal compressor grade according to claim 4, which is characterized in that press quality hundred
Divide than meter, the material component of the nickel aluminium powder spray coating includes: 85-95% nickel aluminium powder and 5-15% molybdenum.
6. being classified sealing system between multistage centrifugal compressor grade according to claim 5, which is characterized in that the nickel aluminium
In powder, Ni mass percentage content is 80-90%, and Al mass percentage content is 10-20%.
7. it is classified sealing system according between multistage centrifugal compressor grade described in claim 4-6 any claim, it is special
Sign is that the nickel aluminium powder spray coating uses plasma spraying, and spraying temperature is 638-720 DEG C.
8. being classified sealing system between multistage centrifugal compressor grade according to claim 4, which is characterized in that the aluminium silicon
Polybenzoate spray coating uses plasma spraying, and by mass percentage, the material component of the aluminium silicon polybenzoate spray coating includes:
40-60%Al and 15-25%Si and 10-20%Mo.
9. being classified sealing system between multistage centrifugal compressor grade according to claim 1, which is characterized in that the sealing
Matrix includes balance hub sealing matrix and/or low-pressure stage sealing matrix, and the low-pressure stage sealing matrix is anti-strip abnormity matrix,
Multiple protrusions and multiple indents are distributed on the anti-strip abnormity matrix.
10. being classified sealing system between multistage centrifugal compressor grade according to claim 9, which is characterized in that described convex
It rises and the indent interlaced arrangement, the protrusion and the indent is tooth form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192235.8A CN109869329A (en) | 2019-03-14 | 2019-03-14 | Sealing system is classified between a kind of multistage centrifugal compressor grade |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910192235.8A CN109869329A (en) | 2019-03-14 | 2019-03-14 | Sealing system is classified between a kind of multistage centrifugal compressor grade |
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| CN109869329A true CN109869329A (en) | 2019-06-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110760781A (en) * | 2019-09-27 | 2020-02-07 | 武汉钢铁有限公司 | Gradient sealing coating structure resistant to gas corrosion and preparation method thereof |
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Application publication date: 20190611 |
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