CN216922228U - Rotor and stator step type labyrinth sealing structure with axial side teeth - Google Patents
Rotor and stator step type labyrinth sealing structure with axial side teeth Download PDFInfo
- Publication number
- CN216922228U CN216922228U CN202220453551.3U CN202220453551U CN216922228U CN 216922228 U CN216922228 U CN 216922228U CN 202220453551 U CN202220453551 U CN 202220453551U CN 216922228 U CN216922228 U CN 216922228U
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- axial
- side teeth
- tooth
- rotor
- teeth
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- 238000007789 sealing Methods 0.000 title description 12
- 244000126211 Hericium coralloides Species 0.000 claims abstract description 19
- 208000002925 dental caries Diseases 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a rotor and stator stepped labyrinth seal structure with axial side teeth, which comprises: the stator is arranged on the outer side of the rotor in a matched mode, a stepped structure is arranged on the inner periphery of the stator, axial step side teeth corresponding to the axial step side teeth are connected to the stepped structure, and the comb tooth cavities are divided along the radial direction of the rotor through the axial step side teeth and the axial step side teeth which are correspondingly arranged to form a continuous radial cavity area. This rotor contains step labyrinth obturating structure of axial side tooth, through setting up the side tooth, can strengthen the liquid mixing in labyrinth tooth chamber, increases the dissipation of labyrinth along journey air current kinetic energy, reduces the velocity of flow.
Description
Technical Field
The utility model belongs to the technical field of aerospace, and particularly provides a stepped labyrinth seal structure with axial side teeth for a rotor and a stator.
Background
Since the birth of an aircraft gas turbine engine, the sealing of gas and liquid has become one of the main problems, and has a great influence on the performance, reliability, life and maintainability of the engine.
The labyrinth seal is a non-contact dynamic seal which utilizes sudden expansion and sudden contraction of a channel to increase flow resistance to limit fluid leakage, is an effective and long-life seal structure widely used in an aeroengine, and is mainly used for gas compressor and turbine interstage, top of blades, cooling flow path system, gas isolation, oil-gas isolation in a main bearing cavity lubricating oil seal system and the like.
In the operation process of the labyrinth seal structure, due to abrasion between the rotor part and the stator part, the width of a throttling gap is increased, and the key of the leakage amount of the side tooth structure is that the energy of fluid in a tooth cavity is fully dissipated. The reasonably designed labyrinth sealing structure is characterized in that a fluid medium generates effective flow characteristics such as vortex and jet flow, so that the energy of the fluid is fully dissipated in the flow process, a large pressure difference between two sealed sides is realized, and the sealing effect is further realized, which means that higher requirements are provided for the design of the labyrinth sealing structure.
Typical labyrinth seal structures commonly used in aircraft engines include straight-through and stepped. The straight-through type labyrinth sealing structure is simple, the ventilation effect is strong, the sealing performance is poor, and the straight-through type labyrinth sealing structure is only used for the working condition of low speed and low pressure difference. The sealing performance of the stepped labyrinth seal structure is greatly improved compared with that of a straight-through tooth, and the stepped labyrinth seal structure can be used for sealing low and medium pressure difference flow paths. However, the conventional stepped grate seal still has a large liftable space in terms of reducing the total flow of gas.
Therefore, how to optimize the stepped grate sealing structure to increase the kinetic energy dissipation of the grate along the path of the air flow, reduce the flow rate, further achieve the purpose of reducing the leakage amount, and become a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a stepped labyrinth seal structure for a rotor and a stator including axial side teeth, so as to solve the problems pointed out in the background art.
The technical scheme provided by the utility model is as follows: rotor-stator contains step labyrinth seal structure of axial side tooth, includes: the rotor comprises a rotor and a stator, wherein the periphery of the rotor is provided with a plurality of stages of radial step comb teeth at intervals along the axial direction of the rotor, a comb tooth cavity is formed between every two adjacent radial step comb teeth, the front end surface of the radial step comb teeth at the second stage and later is connected with axial comb tooth side teeth along the flow direction of a fluid, the stator is arranged on the outer side of the rotor in a matched mode, the inner periphery of the stator is provided with step structures which are in one-to-one correspondence with the radial step comb teeth, each step structure comprises a radial step platform, the radial step platforms are connected with axial step side teeth which are in correspondence with the axial comb tooth side teeth, the axial comb tooth side teeth and the axial step side teeth which are correspondingly arranged are arranged in a staggered mode along the radial direction of the rotor and are positioned on the inner side of the axial step side teeth, and the axial comb tooth cavity is divided along the radial direction of the rotor by the axial step side teeth and the axial step side teeth, forming a continuous radial cavity region.
Preferably, the cross-sections of the axial comb tooth side teeth and the axial step side teeth are both right trapezoid, wherein the outer side surface of the axial comb tooth side teeth corresponds to the straight waist of the right trapezoid, the inner side surface corresponds to the oblique waist of the right trapezoid, the connecting end surface of the radial step comb tooth corresponds to the lower bottom of the right trapezoid, the free end corresponds to the upper bottom of the right trapezoid, the outer side surface of the axial step side teeth corresponds to the oblique waist of the right trapezoid, the inner side surface corresponds to the straight waist of the right trapezoid, the connecting end surface of the radial step comb tooth corresponds to the lower bottom of the right trapezoid, and the free end corresponds to the upper bottom of the right trapezoid.
Preferably, the tooth tops of the radial step grate teeth protrude out of the outer side face of the axial grate tooth side tooth connected with the radial step grate teeth.
Preferably, the thickness of the axial grate tooth side teeth and the thickness of the axial step side teeth which are correspondingly arranged are the same, and the radial distance between the axial grate tooth side teeth and the axial step side teeth along the rotor is equal to the tooth tip thickness of the axial grate tooth side teeth and the tooth tip thickness of the axial step side teeth along the rotor.
Preferably, the thickness and the width of each axial stage of comb tooth side teeth are consistent, and the thickness and the width of each axial stage of step side teeth are consistent.
The stepped labyrinth seal structure with the rotor and the stator comprising the axial side teeth is reasonable in structure, and the axial step side teeth and the axial labyrinth side teeth are arranged on the inner side of the stator and the radial stepped labyrinth correspondingly, so that kinetic energy dissipation of airflow along the path of the labyrinth can be increased, the flow rate is reduced, and the purpose of reducing leakage is achieved.
Drawings
The utility model is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a sectional view of a stepped labyrinth seal structure of a rotor and a stator with axial side teeth, which is provided by the utility model.
Detailed Description
The utility model will be further explained with reference to specific embodiments, without limiting the utility model.
As shown in fig. 1, the utility model provides a stepped labyrinth seal structure with axial side teeth for a rotor and a stator, which comprises: the rotor comprises a rotor 1 and a stator 2, wherein the periphery of the rotor 1 is provided with a plurality of stages of radial stepped grates 11 at intervals along the axial direction of the rotor, a grate tooth cavity is formed between adjacent radial stepped grates 11, the front end surface of the radial stepped grate 11 at the second stage and later is connected with axial grate side teeth 12, the stator 2 is arranged on the outer side of the rotor 1 in a matched manner, the inner periphery of the stator 2 is provided with a step structure which is in one-to-one correspondence with the radial stepped grates 11, the step structure comprises radial steps 21, the radial steps 21 are connected with axial step side teeth 22 which are in correspondence with the axial grate side teeth 12, the axial grate side teeth 12 and the axial step side teeth 22 which are correspondingly arranged are arranged in a staggered manner along the radial direction of the rotor 1, the axial grate side teeth 12 are positioned on the inner side of the axial step side teeth 22, and the axial grate side teeth 12 and the axial step side teeth 22 which are correspondingly arranged enable the grate tooth cavity to be arranged along the radial direction of the rotor 1 And (4) carrying out segmentation to form a continuous radial cavity region.
The stepped labyrinth seal structure with the rotor and the stator comprising the axial side teeth has the advantages that the stator and the radial stepped labyrinth are provided with the corresponding axial step side teeth and the axial labyrinth side teeth, a labyrinth tooth cavity can be divided along the radial direction of the rotor to form a continuous radial cavity area, and the axial flow airflow can form fluctuating flow by utilizing the throttling effect of the axial step side teeth and the axial labyrinth side teeth which are staggered and correspondingly arranged and the vortex in the labyrinth tooth cavity, so that the axial flow resistance of the fluid is increased, and the fluid leakage amount is reduced.
The stepped labyrinth seal structure with the rotor and the stator comprising the axial side teeth increases axial flow damping by arranging the corresponding axial step side teeth and the axial labyrinth side teeth on the stator and the radial stepped labyrinth, so that airflow pressure forms larger flow resistance when flowing, and the effects of reducing pressure and reducing leakage are achieved. In addition, the stepped labyrinth seal structure with the rotor and the stator comprising the axial side teeth can strengthen the mixing of fluid in the cavity, increase the kinetic energy dissipation of the air flow along the path of the labyrinth, reduce the flow velocity and reduce the leakage rate of the fluid. Through the grate with fewer stages, a better sealing effect can be realized.
As an improvement of the technical solution, as shown in fig. 1, the cross sections of the axial comb tooth side teeth 12 and the axial step side teeth 22 are both in a right trapezoid shape, wherein the outer side surface of the axial comb tooth side teeth 12 corresponds to the straight waist of the right trapezoid shape, the inner side surface corresponds to the oblique waist of the right trapezoid shape, the connecting end surface of the radial step comb tooth 11 corresponds to the lower bottom of the right trapezoid shape, the free end corresponds to the upper bottom of the right trapezoid shape, the outer side surface of the axial step side teeth 22 corresponds to the oblique waist of the right trapezoid shape, the inner side surface corresponds to the straight waist of the right trapezoid shape, the connecting end surface of the radial step comb tooth 21 corresponds to the lower bottom of the right trapezoid shape, and the free end corresponds to the upper bottom of the right trapezoid shape.
As an improvement of the technical scheme, as shown in figure 1, the tooth tops of the radial step grid teeth 11 protrude out of the outer side surface of the axial grid tooth side teeth 12 connected with the radial step grid teeth.
As an improvement of the technical solution, the thicknesses of the correspondingly arranged axial labyrinth side teeth 12 and the axial step side teeth 22 are the same, and the radial distance between the two teeth along the rotor 1 is equal to the tooth tip thicknesses of the two teeth.
As the improvement of the technical scheme, the thickness and the width of each level of axial grid tooth side teeth 12 are consistent, and the thickness and the width of each level of axial step side teeth 22 are consistent.
The embodiments of the present invention have been written in a progressive manner with emphasis placed on the differences between the various embodiments, and similar elements may be found in relation to each other.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (5)
1. Rotor-stator contains step labyrinth seal structure of axial side tooth, its characterized in that includes: the rotor comprises a rotor (1) and a stator (2), wherein the periphery of the rotor (1) is provided with multiple stages of radial stepped grates (11) at intervals along the axial direction of the rotor, a grated tooth cavity is formed between every two adjacent radial stepped grates (11), the front end surfaces of the radial stepped grates (11) at the second stage and later are connected with axial grated tooth side teeth (12) along the flow direction of a fluid, the stator (2) is arranged on the outer side of the rotor (1) in a matched mode, the inner periphery of the stator (2) is provided with step structures in one-to-one correspondence with the radial stepped grates (11), each step structure comprises a radial step (21), the radial step (21) is connected with axial step side teeth (22) corresponding to the axial grated tooth side teeth (12), the axial grate tooth side teeth (12) and the axial step side teeth (22) which are correspondingly arranged are arranged in a staggered mode along the radial direction of the rotor (1), and the axial step side teeth (12) are located on the inner side teeth (22) of the axial step (22) The axial grid tooth side teeth (12) and the axial step side teeth (22) which are correspondingly arranged divide the grid tooth cavity along the radial direction of the rotor (1) to form a continuous radial cavity area.
2. The rotor and stator step type labyrinth seal structure with axial side teeth as claimed in claim 1, wherein: the cross-section of axial comb tooth side tooth (12) with axial halfpace side tooth (22) all is right trapezoid, wherein, the lateral surface of axial comb tooth side tooth (12) corresponds right trapezoid's straight waist, and the medial surface corresponds right trapezoid's oblique waist, corresponds right trapezoid's lower bottom with the connection terminal surface of radial step comb tooth (11), and the free end corresponds right trapezoid's upper end, the lateral surface of axial halfpace side tooth (22) corresponds right trapezoid's oblique waist, and the medial surface corresponds right trapezoid's straight waist, corresponds right trapezoid's lower bottom with the connection terminal surface of radial halfpace (21), and the free end corresponds right trapezoid's upper end.
3. The rotor and stator step type labyrinth seal structure with axial side teeth as claimed in claim 1, wherein: the tooth tips of the radial step comb teeth (11) protrude out of the outer side surface of the axial comb tooth side teeth (12) connected with the radial step comb teeth.
4. The rotor and stator step type labyrinth seal structure with axial side teeth as claimed in claim 1, wherein: the thickness of the axial grid tooth side teeth (12) and the thickness of the axial step table side teeth (22) which are correspondingly arranged are the same, and the radial distance of the axial grid tooth side teeth and the axial step table side teeth along the rotor (1) is equal to the tooth tip thickness of the axial grid tooth side teeth and the axial step table side teeth.
5. The rotor and stator step type labyrinth seal structure with axial side teeth as claimed in claim 1, wherein: the thickness and the width of each stage of axial grid tooth side teeth (12) are consistent, and the thickness and the width of each stage of axial step side teeth (22) are consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220453551.3U CN216922228U (en) | 2022-03-04 | 2022-03-04 | Rotor and stator step type labyrinth sealing structure with axial side teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220453551.3U CN216922228U (en) | 2022-03-04 | 2022-03-04 | Rotor and stator step type labyrinth sealing structure with axial side teeth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216922228U true CN216922228U (en) | 2022-07-08 |
Family
ID=82224522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220453551.3U Expired - Fee Related CN216922228U (en) | 2022-03-04 | 2022-03-04 | Rotor and stator step type labyrinth sealing structure with axial side teeth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216922228U (en) |
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2022
- 2022-03-04 CN CN202220453551.3U patent/CN216922228U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220708 |