CN111911241B - Axial positioning and cooling sealing structure of guide vane - Google Patents
Axial positioning and cooling sealing structure of guide vane Download PDFInfo
- Publication number
- CN111911241B CN111911241B CN202010760071.7A CN202010760071A CN111911241B CN 111911241 B CN111911241 B CN 111911241B CN 202010760071 A CN202010760071 A CN 202010760071A CN 111911241 B CN111911241 B CN 111911241B
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- Prior art keywords
- hook
- outer ring
- casing
- guide vane
- front side
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- 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
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- 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
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
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- 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
-
- 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
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The application belongs to the field of aeroengine blades, and particularly relates to an axial positioning and cooling sealing structure of a guide blade. The method comprises the following steps: the casing, the guide vane, the fixing ring, the outer ring and the working vane pressing and sealing piece. The cross section of the fixing ring is T-shaped, the fixing ring comprises a front side ring plate and a rear extension arm excircle, the front side ring plate is inserted into an annular groove in the inner wall of the casing, and the side of the front side ring plate is abutted against the second hook of the guide vane, so that the guide vane is axially pressed and positioned; the sealing piece is J-shaped and is arranged on the front side of the outer ring and is matched and connected with the rear side of the guide blade upper edge plate, and the sealing of the connecting position of the front side of the working blade upper edge plate and the rear side of the guide blade upper edge plate is realized. The fixing ring is simple in structure, the accumulated tolerance of the structure is small, and the guide vane is reliable and accurate in fixing and axial positioning; the J-shaped sealing piece can contain the tolerance caused by casting and processing of the guide blade and the outer ring, has good sealing effect, and has the function of guiding in and convenient assembly.
Description
Technical Field
The application belongs to the field of aeroengine blades, and particularly relates to an axial positioning and cooling sealing structure of a guide blade.
Background
In the working process of the turbine, the guide blades bear the action of pneumatic load, a reliable axial positioning mode is needed, the traditional guide blade axial positioning mode is directly fixed on a casing by bolts or is gradually compressed by an outer ring fan block behind an upper edge plate, the guide blades 1 and the casing 5 are tightly clamped by an outer ring 3, the outer ring 3 is axially compressed by a rear casing, and more compression parts are needed for axial positioning of the guide blades in the case of a multi-stage turbine. The casing and the outer ring are pressed step by step, the accumulated tolerance of the structure is large, and the accumulated tolerance of the axial position of the guide blade is large, so that the requirements on design and processing are strict, and the linkage influence is large after the component fails.
Need set up air conditioning structure of obturating between guide vane and outer loop, guarantee that the sprue gas does not leak, conventional air conditioning is sealed mostly to be overlap joint formula non-contact structure of obturating, and 1 air exhaust limit shirt rim a of guide vane constitutes overlap joint formula non-contact structure of obturating with 3 air inlet limit shirt rims b of outer loop, and this structure is sealed the effect not good enough when the design of big expansion ratio turbine. The other mode adopts an overlap contact type sealing structure, grooves are formed in the exhaust edge plate of the guide blade 1 and the side face of the air inlet edge of the outer ring 3, and the sealing sheet 4 is inserted to realize the overlap contact type sealing structure, but the assembly performance is poor and the structural usability is poor.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The application aims at providing an axial positioning and cooling sealing structure of a guide vane to solve at least one problem in the prior art.
The technical scheme of the application is as follows:
an axial positioning and cooling seal structure for a guide vane, comprising:
the inner wall of the casing is sequentially provided with a first casing hook, a second casing hook, a third casing hook and a fourth casing hook from the front side to the rear side, and an annular groove is formed in the inner wall of the casing between the second casing hook and the third casing hook along the circumferential direction;
the guide vane is provided with a guide vane upper edge plate, a guide vane first hook is arranged on the front side of the guide vane upper edge plate, a guide vane second hook is arranged on the rear side of the guide vane upper edge plate, the guide vane first hook is connected with the casing first hook, and the guide vane second hook is connected with the casing second hook;
the cross section of the fixing ring is T-shaped, the fixing ring comprises a front side ring plate and a rear boom excircle, the front side ring plate is inserted into the annular groove in the inner wall of the casing, and the side of the front side ring plate is abutted against the second guide vane hook;
the outer ring is provided with an outer ring upper edge plate and an outer ring lower edge plate, an outer ring first hook is arranged on the front side of the outer ring upper edge plate, an outer ring second hook is arranged on the rear side of the outer ring upper edge plate, an outer ring third hook is arranged on the front side of the outer ring lower edge plate, an outer ring fourth hook is arranged on the rear side of the outer ring lower edge plate, the outer ring first hook clamps the casing third hook and the rear boom excircle of the fixing ring, and the outer ring second hook is connected with the casing fourth hook;
the working blade is provided with a working blade upper edge plate, the front side of the working blade upper edge plate is abutted against the rear side of the guide blade upper edge plate, the front side of the working blade upper edge plate is provided with a working blade first hook, the rear side of the working blade upper edge plate is provided with a working blade second hook, the working blade first hook is connected with the outer ring third hook, and the working blade second hook is connected with the outer ring fourth hook;
and the sealing piece is arranged on the front side of the outer ring and is matched and connected with the rear side of the guide blade upper edge plate, so that the sealing of the connection position of the front side of the working blade upper edge plate and the rear side of the guide blade upper edge plate is realized.
Optionally, the fixing ring is an open ring and is elastically installed in an annular groove on the inner wall of the casing by virtue of the opening.
Optionally, the first outer ring hook and the third casing hook, and the first working blade hook and the third outer ring hook are connected by countersunk screws.
Optionally, a mounting edge is provided at the rear side of the casing.
Optionally, the second hook of the working vane is connected with the fourth hook of the outer ring through a locking ring.
Optionally, the sealing piece is arranged on the front side of the outer ring by welding.
Optionally, the material of the sealing sheet is GH 605.
The invention has at least the following beneficial technical effects:
according to the axial positioning and cooling sealing structure of the guide vane, the design structure of the axial fixing ring of the guide vane is simple, the accumulated tolerance of the structure is small, and the fixing and axial positioning of the guide vane are reliable and accurate; the elastic contact type sealing design of the J-shaped sealing piece is adopted in the cooling sealing structure, the elastic design of the J-shaped sealing piece bent hook section can be guaranteed to be in contact with the guide blade flange plate, the tolerance caused by casting and machining of the guide blade and the outer ring is contained, the sealing effect is good, and the J-shaped design of the bent hook section has a guiding effect and is convenient to assemble.
Drawings
FIG. 1 is a schematic view of a stage-by-stage compression axial positioning structure of a guide vane in the prior art;
FIG. 2 is a schematic diagram of a related art lap-type non-contact seal structure;
FIG. 3 is a schematic view of a prior art lap contact seal configuration;
FIG. 4 is a schematic view of an axial positioning and cooling seal configuration of a guide vane of an embodiment of the present application;
FIG. 5 is an enlarged partial view of an axial positioning and cooling seal configuration of a guide vane of an embodiment of the present application.
Wherein:
1-guide vanes; 2-a working blade; 3-the outer loop; 4-sealing the sheet; 5-a casing; 6-fixing the ring.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are some, but not all embodiments of the disclosure. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.
The present application is described in further detail below with reference to fig. 4 to 5.
The application provides guide vane's axial positioning and cooling structure of obturating includes: the device comprises a casing 5, guide blades 1, a fixing ring 6, an outer ring 3, a working blade 2 and a sealing sheet 4.
Specifically, as shown in fig. 4, a first casing hook, a second casing hook, a third casing hook and a fourth casing hook are sequentially arranged on the inner wall of the casing 5 from the front side to the rear side, and an annular groove is formed in the inner wall of the casing 5 between the second casing hook and the third casing hook along the circumferential direction; guide vane 1 is provided with guide vane top edge plate, and the front side of guide vane top edge plate is provided with guide vane first couple, and the rear side is provided with guide vane second couple, and wherein, guide vane first couple articulates with the first couple of quick-witted casket, and guide vane second couple articulates with quick-witted casket second couple.
Further, the cross section of the fixing ring 6 is T-shaped, the fixing ring 6 comprises a front side ring plate and a rear boom excircle, wherein the front side ring plate is inserted into an annular groove in the inner wall of the casing 5, and the side of the front side ring plate is abutted against the second guide vane hook, so that the axial compression positioning of the guide vane 1 is realized; the outer ring 3 is provided with an outer ring upper edge plate and an outer ring lower edge plate, an outer ring first hook is arranged on the front side of the outer ring upper edge plate, an outer ring second hook is arranged on the rear side of the outer ring upper edge plate, an outer ring third hook is arranged on the front side of the outer ring lower edge plate, and an outer ring fourth hook is arranged on the rear side of the outer ring lower edge plate, wherein the outer ring first hook integrally clamps a casing third hook and a rear boom excircle of the fixed ring 6, and the outer ring second hook is hooked with the casing fourth hook; the working blade 2 is provided with a working blade upper edge plate, the front side of the working blade upper edge plate is abutted against the rear side of the guide blade upper edge plate, the front side of the working blade upper edge plate is provided with a first working blade hook, the rear side of the working blade upper edge plate is provided with a second working blade hook, the first working blade hook is connected with a third outer ring hook, and the second working blade hook is connected with a fourth outer ring hook.
In the axial positioning and cooling of guide vane structure of this application, piece 4 of obturating is the J type, and piece 4 of obturating sets up in the front side of outer loop 3 to be connected with the rear side cooperation of guide vane upper fringe board, realize the sealed of the rear side junction of working vane upper fringe board front side and guide vane upper fringe board.
In an embodiment of the present application, the fixing ring 6 may be configured as an open ring, and is elastically installed in an annular groove on the inner wall of the casing 5 by means of the opening, and the guide vane 1 is axially compressed and positioned by a front side annular plate of the fixing ring 6, so that the accumulated structural tolerance is small, and the axial positioning of the guide vane 1 is reliable and accurate.
In one embodiment of the application, a threaded hole is formed in a position, corresponding to the outer ring first hook and the casing third hook, of the outer ring, a threaded hole is formed in a position, corresponding to the outer ring third hook, of the working blade first hook, the corresponding hook is connected through a countersunk head screw, and the working blade second hook is connected with the outer ring fourth hook through a locking ring, so that the connection reliability is improved. In this embodiment, the rear side of the casing 5 is further provided with a mounting edge for assembling the casing 5.
In one embodiment of the present application, as shown in fig. 5, the sealing sheet 4 is J-shaped, and the material of the sealing sheet 4 is GH 605. The sealing piece 4 can be arranged on the front side of the outer ring 3 through welding, the J-shaped design vertical section is convenient to fix, the bent hook section is elastic, and the bent hook section is in contact connection with the edge plate on the guide blade and used for sealing the air conditioner, and meanwhile, the guiding effect is achieved, and the assembly is convenient.
According to the axial positioning and cooling sealing structure of the guide vane, the design of the axial fixing ring of the guide vane has the advantages of simple structure, small accumulated tolerance of the structure, and reliable and accurate fixing and axial positioning of the guide vane; the elastic contact type sealing design of the J-shaped sealing piece is adopted in the cooling sealing structure, the elastic design of the J-shaped sealing piece bent hook section can ensure that the J-shaped sealing piece is in contact with the upper edge plate of the guide blade, tolerance caused by casting and machining of the guide blade and the outer ring is contained, the sealing effect is good, the J-shaped design of the bent hook section has a guiding effect, and assembly is facilitated. The application is applicable to engine stator design.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. An axial positioning and cooling seal structure for a guide vane, comprising:
the device comprises a casing (5), wherein a first casing hook, a second casing hook, a third casing hook and a fourth casing hook are sequentially arranged on the inner wall of the casing (5) from the front side to the rear side, and an annular groove is formed in the inner wall of the casing (5) between the second casing hook and the third casing hook along the circumferential direction;
the guide vane (1) is provided with a guide vane upper edge plate, a guide vane first hook is arranged on the front side of the guide vane upper edge plate, a guide vane second hook is arranged on the rear side of the guide vane upper edge plate, the guide vane first hook is connected with the casing first hook, and the guide vane second hook is connected with the casing second hook;
the outer ring (3) is provided with an outer ring upper edge plate and an outer ring lower edge plate, an outer ring first hook is arranged on the front side of the outer ring upper edge plate, an outer ring second hook is arranged on the rear side of the outer ring upper edge plate, an outer ring third hook is arranged on the front side of the outer ring lower edge plate, an outer ring fourth hook is arranged on the rear side of the outer ring lower edge plate, and the outer ring second hook is connected with the casing fourth hook;
a rotor blade (2);
the sealing piece (4) is J-shaped, and the sealing piece (4) is arranged on the front side of the outer ring (3) and is matched and connected with the rear side of the guide blade upper edge plate to seal the connection part of the front side of the working blade upper edge plate and the rear side of the guide blade upper edge plate;
the guide vane type air conditioner is characterized by further comprising a fixing ring (6), the cross section of the fixing ring is T-shaped, the fixing ring (6) comprises a front side ring plate and a rear extension arm excircle, the front side ring plate is inserted into an annular groove in the inner wall of the casing (5), the front side ring plate abuts against the guide vane second hook, and the outer ring first hook clamps the casing third hook and the rear extension arm excircle of the fixing ring (6);
working blade (2) are provided with the working blade top flange, working blade top flange front side with the rear side butt of stator blade top flange, the front side of working blade top flange is provided with the first couple of working blade, and the rear side is provided with the working blade second couple, the first couple of working blade with outer loop third couple is connected, the working blade second couple with outer loop fourth couple is connected.
2. The guide vane axial positioning and cooling and sealing structure as claimed in claim 1, characterized in that the fixing ring (6) is a split ring, which is elastically fitted into an annular groove on the inner wall of the casing (5).
3. The axial positioning and cooling sealing structure of guide vanes of claim 1, wherein the first outer ring hook and the third casing hook, and the first working vane hook and the third outer ring hook are connected by countersunk head screws.
4. Guide vane axial positioning and cooling seal structure according to claim 1, characterized in that the rear side of the casing (5) is provided with a mounting edge.
5. The axial positioning and cooling sealing structure for guide vanes according to claim 1, wherein said second hook of said working vane is connected to said fourth hook of said outer ring by a locking ring.
6. Guide vane axial positioning and cooling seal structure according to claim 1, characterized in that the seal sheet (4) is arranged by welding at the front side of the outer ring (3).
7. The guide vane axial positioning and cooling seal structure of claim 1, wherein the seal piece (4) is made of GH 605.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010760071.7A CN111911241B (en) | 2020-07-31 | 2020-07-31 | Axial positioning and cooling sealing structure of guide vane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010760071.7A CN111911241B (en) | 2020-07-31 | 2020-07-31 | Axial positioning and cooling sealing structure of guide vane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111911241A CN111911241A (en) | 2020-11-10 |
| CN111911241B true CN111911241B (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010760071.7A Active CN111911241B (en) | 2020-07-31 | 2020-07-31 | Axial positioning and cooling sealing structure of guide vane |
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| CN (1) | CN111911241B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114165300B (en) * | 2021-10-20 | 2023-06-13 | 中国航发四川燃气涡轮研究院 | Turbine rear bearing floating structure capable of reducing thermal stress |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775139B (en) * | 2012-10-26 | 2015-09-23 | 中航商用航空发动机有限责任公司 | The clearance control system of turbogenerator and the clearance control method of turbogenerator |
| CN204419280U (en) * | 2015-01-06 | 2015-06-24 | 中国航空工业集团公司沈阳发动机设计研究所 | Seal structure between a kind of high and low pressure turbine stator |
| CN205330743U (en) * | 2015-11-19 | 2016-06-22 | 中国燃气涡轮研究院 | Turbine middle level machine casket |
| CN206513408U (en) * | 2017-01-23 | 2017-09-22 | 中国航发沈阳发动机研究所 | A kind of low-pressure turbine guide vane location structure and the engine with it |
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- 2020-07-31 CN CN202010760071.7A patent/CN111911241B/en active Active
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| CN111911241A (en) | 2020-11-10 |
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