CN114233402B - Stator blade with blade edge plate sealing structure - Google Patents
Stator blade with blade edge plate sealing structure Download PDFInfo
- Publication number
- CN114233402B CN114233402B CN202010941345.2A CN202010941345A CN114233402B CN 114233402 B CN114233402 B CN 114233402B CN 202010941345 A CN202010941345 A CN 202010941345A CN 114233402 B CN114233402 B CN 114233402B
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- sealing
- blade edge
- blade
- sealing strip
- edge plate
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- 238000007789 sealing Methods 0.000 title claims abstract description 103
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/005—Sealing means between non relatively rotating elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a blade edge plate sealing structure which is arranged between two adjacent blade edge plates, wherein the blade edge plate sealing structure comprises a sealing strip, the upper part of the sealing strip is of a V-shaped structure, the lower part of the sealing strip is of a hemispherical structure, two sides of the sealing strip are provided with assembling grooves formed by the V-shaped structure and the hemispherical structure, the shape of the end parts of the blade edge plates is matched with the assembling grooves, and the two adjacent blade edge plates are in sealing connection by the sealing strip. The invention adopts a sealing strip structure for sealing, thereby reducing the processing precision and the processing cost; the sealing effect is good, the gas leakage is reduced, and the engine efficiency is improved.
Description
Technical Field
The invention relates to the field of aeroengines, in particular to a stator blade with a blade edge plate sealing structure.
Background
Fig. 1 is a schematic diagram of a prior art fan booster stage. Fig. 2 is a schematic structural view of an outer culvert stator vane.
As shown in fig. 1 and 2, in the field of aeroengines, an axial-flow aeroengine comprises an outer culvert runner 10 and an inner culvert runner 11, wherein after being pressurized by rotor blades of a fan rotor 13, outer culvert airflow flows to the tail of the engine after passing through a circle of outer culvert stator blades 12 in the circumferential direction, so that thrust is provided, and a fan pressurizing stage structure is shown in fig. 1. The outer culvert stator blade 12 is connected with the intermediate casing 14 and the outer ring 15 through bolts, plays roles in supporting force transmission and airflow guiding, and the outer culvert stator blade 12 consists of a blade body 121, a flange plate 122 and a mounting edge 123.
Fig. 3 is a schematic structural view of a circumferential gap of an edge plate of an outer stator blade.
As shown in fig. 3, to meet the installation requirements, a circumferential gap a exists between the blade platform and the platform. The gas pressurized by the rotor blade has pressure difference inside and outside the flow passage, and leakage can be generated through the circumferential gap a, so that the working efficiency and stability of the engine are reduced, the fuel consumption is increased, and the cost is increased.
In order to reduce the circumferential gap of the outer stator blade and reduce the gas leakage loss, the current common schemes have the following two types:
the first scheme is to improve the dimensional accuracy of the outer culvert stator flange plate and reduce the circumferential gap of the flange plate. The dimensional accuracy of the blade edge plate is improved, the processing difficulty is increased, the product qualification rate is reduced, and the processing cost is increased; because the volume of the part is larger, the part is easy to deform after processing, the qualification rate of the product is further reduced, meanwhile, the dimension of the flange plate with higher dimension precision can increase the assembly difficulty, the assembly efficiency is reduced, and the cost is increased; due to the existence of the circumferential gap, the sealing effect is poor, gas leakage is caused, and the engine efficiency is reduced.
The second scheme is to increase the thickness of the flange plate for the blade, and the edge is provided with a U-shaped groove structure.
Fig. 4 (a) is a side view of the blade axis in the second embodiment. Fig. 4 (b) shows a top view of the blade in the second embodiment. FIG. 4 (C) is a cross-sectional view of the U-shaped slot of the blade taken along line C-C in FIG. 4 (b). Fig. 5 (a) is an assembly schematic of the second variant. Fig. 5 (B) is an enlarged schematic view of the portion B in fig. 5 (a).
As shown in fig. 4 (a) to 4 (c), a sealing strip is assembled in the U-shaped groove 124 of the flange to perform a sealing function, and the assembled assembly is schematically shown in fig. 5 (a).
In the first and second schemes, the U-shaped groove structure is designed, so that the thickness of the flange plate needs to be increased to meet the strength requirement, the weight of parts is increased, and the efficiency of the engine is reduced. Meanwhile, the U-shaped groove structure is difficult to process, the precision requirement is high, and the cost is increased.
Fig. 6 (a) is a schematic structural diagram of a sealing strip in the prior art. Fig. 6 (b) is a schematic diagram of a sealing strip in the prior art.
As shown in fig. 6 (a) and 6 (b), in addition, the sealing strip 16 needs to be assembled from back to front in the assembling process, the flange surface is in an irregular shape, the assembling difficulty is increased, and the assembling efficiency is reduced. The sealing strip is limited in structural size, easy to fall off and lose efficacy in working state, and is bad in reliability and safety of an engine. And when maintenance is changed, the nacelle structure needs to be disassembled, and the maintenance cost is high.
In view of this, those skilled in the art have developed a stator vane having a vane rim plate sealing structure in an effort to overcome the above-described technical problems.
Disclosure of Invention
The invention aims to overcome the defects of difficult assembly, low assembly efficiency and the like of a sealing structure in the prior art that a circumferential gap exists between blade edge plates, and provides a stator blade with a blade edge plate sealing structure.
The invention solves the technical problems by the following technical proposal:
The utility model provides a blade edge plate seal structure, its characterized in that, blade edge plate seal structure installs between two adjacent blade edge plates, blade edge plate seal structure includes the strip of sealing, the upper portion of strip of sealing is V-arrangement structure, and the lower part is hemispherical structure, the both sides of strip of sealing pass through V-arrangement structure with the assembly recess that hemispherical structure formed, the shape of the tip of blade edge plate with assembly recess matches, and adjacent two blade edge plates pass through strip sealing connection of sealing.
According to one embodiment of the invention, the middle part of the sealing strip is provided with a deformation groove.
According to one embodiment of the present invention, the compression deformation amount of the hemispherical structure is (2l+l0)/L0;
wherein L0 represents the width of the middle portion of the sealing strip; l represents the width of the outwardly extending portion of the hemispherical structure along the middle portion of the sealing strip.
According to one embodiment of the invention, the hemispherical structure is subjected to a lower pressure than is required for compression upwards than for compression downwards.
According to one embodiment of the invention, the shape of the deformation groove is elliptical.
According to one embodiment of the invention, the radius of the arc of the upper end of the deformation groove is larger than the radius of the arc of the lower end of the deformation groove.
According to one embodiment of the present invention, the height from the arc of the upper end of the deformation groove to the upper end surface of the hemispherical structure is greater than the height from the arc of the lower end of the deformation groove to the upper end surface of the hemispherical structure.
According to one embodiment of the invention, the upper end face of the blade edge plate is flush with the upper end face of the V-shaped structure.
According to one embodiment of the invention, the lower end face of the blade edge plate is flush with the upper end face of the hemispherical structure.
According to one embodiment of the invention, each end of the V-shaped structure and the hemispherical structure is rounded.
The invention has the positive progress effects that:
The stator blade with the blade edge plate sealing structure has the following advantages:
1. The sealing strip structure is sealed, so that the processing precision is reduced, and the processing cost is reduced;
2. The sealing effect is good, the gas leakage is reduced, and the engine efficiency is improved;
3. the structure without a U-shaped groove increases the strength and fatigue life of parts, enhances the reliability and prolongs the service life of the engine;
4. The weight of parts is reduced, the fuel consumption rate is reduced, and the engine efficiency is improved;
5. easy installation, raise the efficiency, later-stage is convenient for change and maintenance, reduce cost of maintenance.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings in which like reference characters designate like features throughout the drawings, and in which:
fig. 1 is a schematic diagram of a prior art fan booster stage.
Fig. 2 is a schematic structural view of an outer culvert stator vane.
Fig. 3 is a schematic structural view of a circumferential gap of an edge plate of an outer stator blade.
Fig. 4 (a) is a side view of the blade axis in the second embodiment.
Fig. 4 (b) shows a top view of the blade in the second embodiment.
FIG. 4 (C) is a cross-sectional view of the U-shaped slot of the blade taken along line C-C in FIG. 4 (b).
Fig. 5 (a) is an assembly schematic of the second variant.
Fig. 5 (B) is an enlarged schematic view of the portion B in fig. 5 (a).
Fig. 6 (a) is a schematic structural diagram of a sealing strip in the prior art.
Fig. 6 (b) is a schematic diagram of a sealing strip in the prior art.
FIG. 7 (a) is a schematic view of a stator blade in a blade edge plate sealing structure according to the present invention.
FIG. 7 (b) is a schematic diagram of a stator blade in a blade edge plate sealing structure according to the present invention.
Fig. 7 (c) is a sectional view taken along line D-D in fig. 7 (b).
FIG. 8 (a) is a schematic view of the sealing strip in the blade edge sealing structure of the present invention.
FIG. 8 (b) is a schematic cross-sectional view of a sealing strip in a blade edge panel sealing structure according to the present invention.
FIG. 9 (a) is a schematic view showing a state in which the blade edge plate sealing structure of the present invention is used for a stator blade.
Fig. 9 (b) is a cross-sectional view taken along line E-E in fig. 9 (a).
[ Reference numerals ]
Outer culvert flow channel 10
Connotation flow channel 11
Outer culvert stator blade 12
Fan rotor 13
Intermediate case 14
Outer ring 15
Blade body 121
Edge plate 122
Mounting edge 123
Edge plate U-shaped groove 124
Sealing strip 16, 200
Blade edge plate 100
V-shaped structure 210
Hemispherical structure 220
Fitting groove 230
Deformation groove 240
Radius R1 of upper end arc
Radius R2 of arc at lower end
The height H1 from the arc of the upper end part of the deformation groove to the upper end surface of the hemispherical structure
The height H2 from the arc of the lower end part of the deformation groove to the upper end surface of the hemispherical structure
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Furthermore, although terms used in the present invention are selected from publicly known and commonly used terms, some terms mentioned in the present specification may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
FIG. 7 (a) is a schematic view of a stator blade in a blade edge plate sealing structure according to the present invention. FIG. 7 (b) is a schematic diagram of a stator blade in a blade edge plate sealing structure according to the present invention. Fig. 7 (c) is a sectional view taken along line D-D in fig. 7 (b). FIG. 8 (a) is a schematic view of the sealing strip in the blade edge sealing structure of the present invention. FIG. 8 (b) is a schematic cross-sectional view of a sealing strip in a blade edge panel sealing structure according to the present invention. FIG. 9 (a) is a schematic view showing a state in which the blade edge plate sealing structure of the present invention is used for a stator blade. Fig. 9 (b) is a cross-sectional view taken along line E-E in fig. 9 (a).
As shown in fig. 7 (a) to 9 (b), the present invention discloses a blade edge sealing structure, wherein the blade edge sealing structure is installed between two adjacent blade edges 100, the blade edge sealing structure comprises a sealing strip 200, the upper portion of the sealing strip 200 is a V-shaped structure 210, the lower portion is a hemispherical structure 220, two sides of the sealing strip 200 are assembled into a groove 230 through the V-shaped structure 210 and the hemispherical structure 220, the shape of the end portion of the blade edge 100 is matched with the groove 230, and the two adjacent blade edges 100 are connected in a sealing manner through the sealing strip 200.
Further, a deformation groove 240 is formed in the middle of the sealing strip 200. The shape of the deformation groove 240 is preferably elliptical here. The upper end arc radius R1 of the deformation groove 240 is greater than the lower end arc radius R2 of the deformation groove 240. The height H1 from the upper end arc of the deformation groove 240 to the upper end surface of the hemispherical structure 220 is greater than the height H2 from the lower end arc of the deformation groove 240 to the upper end surface of the hemispherical structure 220.
Further, the compression deformation amount of the hemispherical structure 220 preferably satisfies the relationship (2l+l0)/L0. Wherein L0 represents the width of the middle portion of the sealing strip; l represents the width of the outwardly extending portion of the hemispherical structure along the middle portion of the sealing strip.
Here, the hemispherical structure 220 is subjected to a pressure required for upward compression that is less than a pressure required for downward compression. The upper end surface of the blade edge plate 100 is flush with the upper end surface of the V-shaped structure 210. The lower end surface of the blade platform 100 is flush with the upper end surface of the hemispherical structure 220. Each end of the V-shaped structure 210 and the hemispherical structure 220 is rounded.
According to the structural description, the sealing strip structure adopted by the sealing structure of the blade edge plate is of a V-shaped structure, the upper side of the sealing strip structure is matched with the blade edge plate to prevent the sealing strip from falling down, the lower end of the sealing strip structure is of a hemispherical structure, and the middle part of the sealing strip structure is provided with a deformation groove. For a particular material, different requirements for pressure required for the same deformation in different directions can be achieved. Wherein, the compression deformation of the hemispherical structure is (2L+L0)/L0. Assuming that the required pressure is F1 in upward compression and F2 in downward compression, where F2 is greater than F1, the deformation direction is defined as shown in fig. 8 (b), arrow b indicates downward deformation, and arrow c indicates upward deformation.
And assuming that the pressure F3 is adopted during assembly, the F3 is larger than the F1, and the assembly from top to bottom is realized. In the working state, the pressure F4 caused by the pressure difference and other parameters is far smaller than F2, so that the risk of falling from bottom to top is effectively prevented.
According to the blade edge plate sealing structure, the V-shaped structure is designed on the outer side of the blade edge plate, so that the machining precision is reduced, and the product qualification rate is improved. The blade edge plate adopts a non-U-shaped groove structure, the thickness of the edge plate is reduced, and the weight is reduced. The sealing strip is designed into a V-shaped structure and a hemispherical structure, and the sealing strip can be installed from the upper part of the flange plate by utilizing the characteristic that the pressure required by structural deformation is different, so that the sealing strip is easy to install and maintain and the efficiency is improved. The sealing strip hemispherical structure can be optimally designed according to requirements, different failure pressures can be realized, falling off and failure of the working state can be effectively prevented, and the reliability of the engine is improved. The novel structure is adopted in the blade edge plate sealing structure, so that parts are easy to process, meanwhile, the weight of the parts is reduced, the sealing structure is easy to assemble and maintain, the cost is reduced, the sealing effect between stator blades of an engine is improved, and the efficiency of the engine is improved.
The blade edge plate sealing structure can realize the effects of reducing the weight of the blade, being easy to process and assemble, has excellent sealing effect, can reduce gas leakage and improves the efficiency of the engine. And during maintenance and replacement, the matched parts of the engine are not required to be disassembled, so that the maintenance time is shortened. Of course, the dimension in the application is a specific case of the sealing structure, and according to practical situations, the sealing strips with the same dimension and structure are all in the protection scope of the patent.
In summary, the stator blade with the blade edge plate sealing structure has the following advantages:
1. The sealing strip structure is sealed, so that the processing precision is reduced, and the processing cost is reduced;
2. The sealing effect is good, the gas leakage is reduced, and the engine efficiency is improved;
3. the structure without a U-shaped groove increases the strength and fatigue life of parts, enhances the reliability and prolongs the service life of the engine;
4. The weight of parts is reduced, the fuel consumption rate is reduced, and the engine efficiency is improved;
5. easy installation, raise the efficiency, later-stage is convenient for change and maintenance, reduce cost of maintenance.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (9)
1. The blade edge plate sealing structure is characterized by being arranged between two adjacent blade edge plates, the blade edge plate sealing structure comprises a sealing strip, the upper part of the sealing strip is of a V-shaped structure, the lower part of the sealing strip is of a hemispherical structure, two sides of the sealing strip are provided with assembling grooves formed by the V-shaped structure and the hemispherical structure, the shape of the end parts of the blade edge plates is matched with the assembling grooves, and two adjacent blade edge plates are in sealing connection by the sealing strip;
the compression deformation of the hemispherical structure is (2L+L0)/L0;
wherein L0 represents the width of the middle portion of the sealing strip; l represents the width of the outwardly extending portion of the hemispherical structure along the middle portion of the sealing strip.
2. The blade edge plate sealing structure according to claim 1, wherein a deformation groove is formed in the middle of the sealing strip.
3. The blade edge sealing arrangement of claim 1 wherein the hemispherical structure is subject to a lower pressure than is required in the downward compression.
4. The blade edge panel sealing arrangement of claim 2 wherein the shape of the deformation groove is elliptical.
5. The blade edge sealing arrangement of claim 4, wherein the radius of the arc of the upper end of the deformation groove is greater than the radius of the arc of the lower end of the deformation groove.
6. The blade edge sealing structure of claim 5, wherein the height from the arc of the upper end of the deformation groove to the upper end surface of the hemispherical structure is greater than the height from the arc of the lower end of the deformation groove to the upper end surface of the hemispherical structure.
7. The blade rim sealing structure of claim 1, wherein an upper end surface of the blade rim is flush with an upper end surface of the V-shaped structure.
8. The blade rim sealing structure of claim 1, wherein a lower end surface of the blade rim is flush with an upper end surface of the hemispherical structure.
9. The blade rim sealing structure of claim 1, wherein each end of said V-shaped structure and said hemispherical structure is rounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010941345.2A CN114233402B (en) | 2020-09-09 | 2020-09-09 | Stator blade with blade edge plate sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010941345.2A CN114233402B (en) | 2020-09-09 | 2020-09-09 | Stator blade with blade edge plate sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114233402A CN114233402A (en) | 2022-03-25 |
| CN114233402B true CN114233402B (en) | 2024-07-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010941345.2A Active CN114233402B (en) | 2020-09-09 | 2020-09-09 | Stator blade with blade edge plate sealing structure |
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| CN (1) | CN114233402B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114962338B (en) * | 2022-04-27 | 2024-04-12 | 四川航天中天动力装备有限责任公司 | Split stator casing structure of turbojet engine and assembly method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3462695B2 (en) * | 1997-03-12 | 2003-11-05 | 三菱重工業株式会社 | Gas turbine blade seal plate |
| US6273683B1 (en) * | 1999-02-05 | 2001-08-14 | Siemens Westinghouse Power Corporation | Turbine blade platform seal |
| GB2401658B (en) * | 2003-05-16 | 2006-07-26 | Rolls Royce Plc | Sealing arrangement |
| ES2345303T3 (en) * | 2007-04-05 | 2010-09-20 | Alstom Technology Ltd | SEALING BOARD FOR WINGS OF A TURBOMACHINE. |
| JP2011032985A (en) * | 2009-08-05 | 2011-02-17 | Mitsubishi Heavy Ind Ltd | Rotor blade seal structure and turbine using the same |
| US8939727B2 (en) * | 2011-09-08 | 2015-01-27 | Siemens Energy, Inc. | Turbine blade and non-integral platform with pin attachment |
| CN105156155B (en) * | 2015-07-06 | 2017-06-06 | 西安交通大学 | A kind of movable vane piece blade root platform vibration damping pressure-bearing damping structure |
| US10563531B2 (en) * | 2016-03-16 | 2020-02-18 | United Technologies Corporation | Seal assembly for gas turbine engine |
| CN106593545A (en) * | 2017-01-23 | 2017-04-26 | 中国航发沈阳发动机研究所 | Turbine rotor blade margin plate sealing structure and engine provided with same |
| US11028714B2 (en) * | 2018-07-16 | 2021-06-08 | Raytheon Technologies Corporation | Fan platform wedge seal |
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2020
- 2020-09-09 CN CN202010941345.2A patent/CN114233402B/en active Active
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| CN114233402A (en) | 2022-03-25 |
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