CN118088491B - Casing structure for realizing uniform radial clearance of compressor - Google Patents
Casing structure for realizing uniform radial clearance of compressor Download PDFInfo
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- CN118088491B CN118088491B CN202410524958.4A CN202410524958A CN118088491B CN 118088491 B CN118088491 B CN 118088491B CN 202410524958 A CN202410524958 A CN 202410524958A CN 118088491 B CN118088491 B CN 118088491B
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- straight section
- boss
- annular groove
- wall
- mounting edge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of aeroengines, and discloses a casing structure for realizing uniform radial clearance of a compressor.
Description
Technical Field
The invention relates to the technical field of aeroengines, and discloses a casing structure for realizing uniform radial clearance of a compressor.
Background
In order to meet the requirements of the aero-engine on high performance and high thrust-weight ratio, the radial working gap between the compressor casing and the rotor blade is required not to be too large; at the same time, the gap must not be too small from a safety point of view. In order to maintain an effective working gap, the compressor casing on engineering adopts a thin-wall casing structure of low expansion alloy, and as shown in fig. 1, the compressor casing consists of a front mounting edge 1, a middle section 3 and a rear mounting edge 2, wherein the front mounting edge 1 is connected with a low-temperature stator part of the compressor, and the rear mounting edge 2 is connected with a Gao Wenjing stator part. The working temperature of the case is higher, and there is a large difference in the axial temperature (the temperature sequentially increases from the front mounting side 1 to the rear mounting side 2), the temperature of the low-temperature stator part connected with the front mounting side 1 is lower than that of the case, and the temperature of the high-temperature stator part connected with the rear mounting side 2 is higher than that of the case and the thermal expansion coefficient is higher than that of the case. On one hand, due to the fact that temperature loads of the engine case are different along the axial direction, radial deformation of the engine case is inconsistent along the axial direction; on the other hand, as the deformation of the casing and the connected parts is not coordinated, the degree of difference of radial deformation of the casing along the axial direction is increased, so that the radial working clearances of the casing and the air inlet side and the air outlet side of the rotor blade are greatly different, and the performance and the safety of the engine are adversely affected; in addition, the existing compressor casing is too large in local stress and low in cycle fatigue life due to unreasonable in rigidity design, and the use requirement is not met.
Disclosure of Invention
The invention aims to provide a casing structure for realizing uniform radial clearance of a compressor, which can ensure that the front straight section of the casing of the compressor is consistent with radial working clearances of the air inlet side and the air outlet side of a rotor blade, so that the problem of uneven radial working clearances of the casing of the compressor and the air inlet side and the air outlet side of the rotor blade is avoided, the working stress of the casing is reduced, and the service life of the casing is prolonged.
In order to achieve the technical effects, the technical scheme adopted by the invention is as follows:
a casing structure for achieving uniform radial clearance of a compressor, comprising:
the front mounting edge is used for being connected with the low-temperature stator part of the air compressor;
the rear mounting edge is used for being connected with the Gao Wenjing sub-parts;
The straight section is coaxially fixed between the front mounting edge and the rear mounting edge; the straight section comprises a front straight section and a rear straight section, and the front straight section is coaxially and fixedly connected with the end part of the front mounting edge; the rear straight section is coaxially and fixedly connected with the end part of the rear mounting edge;
The boss, the boss sets up on straight section, and is located the junction position of straight section in front and back, the boss radially just bulge to the casing structure outside along straight section.
Further, an annular groove is formed in the inner wall of the front straight section at a position corresponding to the rotor blade, the annular groove is formed in the circumferential direction of the casing structure, a coating is arranged in the annular groove, and the width of the annular groove is as followsProjection length of chord length of blade tip of rotor blade on meridian planeAnd is smaller thanWhereinIs the axial overlap length of the boss and the annular groove.
Further, the radial height H of the boss is more than or equal to the thickness from the inner wall of the annular groove to the outer wall of the front straight section1.5 Times of (2).
Further, the axial overlap length of the boss and the annular grooveAnd less than or equal to 0.5 times the width L of the annular groove.
Further, the coating material has a hardness that is less than the hardness of the rotor blade tip material.
Further, the axial overlap length of the boss and the rear flat sectionLess than the axial length of the rear straight sectionIs 0.3 times as large as the above.
Further, a first rounding part is arranged at the joint of the boss and the outer wall of the front straight section, a second rounding part is arranged at the joint of the boss and the outer wall of the rear straight section, the radiuses of the first rounding part and the second rounding part are more than or equal to 1 millimeter, and the radial height H of the boss and the thickness of the inner wall of the annular groove to the outer wall of the front straight section are smaller thanIs a difference in (c).
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the boss which protrudes towards the outside of the casing structure along the radial direction of the straight section is arranged between the front straight section and the rear straight section, so that the boss is positioned above the casing structure corresponding to the air inlet side of the stator blade on the air outlet side of the rotor blade, and on the premise of ensuring that the rotor structure is unchanged, the radial working gaps between the front straight section and the air inlet side and the air outlet side of the rotor blade of the compressor casing are ensured to be consistent, thereby avoiding the problem that the radial working gaps between the compressor casing and the air inlet side and the air outlet side of the rotor blade are uneven, reducing the working stress of the casing and prolonging the service life.
Drawings
FIG. 1 is a schematic diagram of a prior art thin-walled casing of low expansion alloy;
FIG. 2 is a schematic diagram of a casing structure for realizing uniform radial clearance of a compressor in an embodiment;
FIG. 3 is a schematic view illustrating a positional relationship between a casing structure and rotor blades and stator blades in an embodiment;
Wherein, 1, front installation edge; 2. a rear mounting edge; 3. an intermediate portion; 4. a front straight section; 5. a rear straight section; 6. a boss; 7. an annular groove; 8. a first rounded portion; 9. a second rounded portion; 10. a rotor blade; 11. stator vanes.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Examples
Referring to fig. 2-3, a casing structure for achieving uniform radial clearance of a compressor includes:
the front mounting edge 1 is used for being connected with a low-temperature stator part of the air compressor;
a rear mounting edge 2, the rear mounting edge 2 being adapted to be connected to a Gao Wenjing sub-part;
The straight section is coaxially fixed between the front mounting edge 1 and the rear mounting edge 2; the straight section comprises a front straight section 4 and a rear straight section 5, and the front straight section 4 is coaxially and fixedly connected with the end part of the front mounting edge 1; the rear straight section 5 is coaxially and fixedly connected with the end part of the rear mounting edge 2;
The boss 6, boss 6 sets up on straight section, and is located the junction position of preceding straight section 4 and back straight section 5, boss 6 radially just bulge to the casing structure outside along straight section.
In this embodiment, the boss 6 protruding towards the outside of the casing structure along the radial direction of the straight section is arranged between the front straight section 4 and the rear straight section 5, so that the boss 6 is located above the casing structure corresponding to the air inlet side of the stator blade 11 on the air outlet side of the rotor blade 10, on the premise of ensuring that the rotor structure is unchanged, the bending rigidity of the front straight section 4 of the compressor casing is improved, the bending deformation of the rear straight section 5 acting on the front straight section 4 is reduced, the radial working gaps between the front straight section 4 and the air inlet side and the air outlet side of the rotor blade 10 of the compressor casing can be ensured to be consistent, the problem that the radial working gaps between the compressor casing and the air inlet side and the air outlet side of the rotor blade 10 are uneven is avoided, and meanwhile, the additional bending moment generated due to the uncoordinated deformation of the straight section of the casing is avoided, so that the working stress of the casing is reduced, and the service life is prolonged.
In this embodiment, an annular groove 7 is provided on the inner wall of the front straight section 4 at a position corresponding to the rotor blade 10, the annular groove 7 is provided along the circumferential direction of the casing structure, and a coating is provided in the annular groove 7 to ensure that the rotor blade 10 is not in direct contact with the front straight section 4 during operation, thereby ensuring the safety of the rotor blade 10; in addition, to ensure that the rotor blade 10 does not break under abnormal loads, the coating must be an abradable seal coating having a hardness less than the hardness of the tip material of the rotor blade 10. In this embodiment, the annular groove 7 has a widthProjection length of chord length of tip of rotor blade 10 on meridian planeAnd is smaller thanWhereinFor the axial overlap length of the boss 6 and the annular groove 7, the rotor blade 10 is ensured not to be in direct contact with the casing when the rotor blade 10 axially swings under the conditions of surge and the like, and the safety margin of the rotor blade 10 is improved.
In this embodiment, the axial overlap length of the boss 6 and the annular groove 7Less than or equal to 0.5 times the width L of the annular groove 7, and the axial overlap length of the boss 6 and the rear flat section 5Less than the axial length of the rear straight section 5The radial height H of the boss 6 is more than or equal to the thickness from the inner wall of the annular groove 7 to the outer wall of the front straight section 4Can ensure the rigidity requirement and the stress requirement of the casing structure by 1.5 times.
In this embodiment, a first rounded portion 8 is disposed at the connection between the boss 6 and the outer wall of the front flat section 4, a second rounded portion 9 is disposed at the connection between the boss 6 and the outer wall of the rear flat section 5, and the radii of the first rounded portion 8 and the second rounded portion 9 are equal to or greater than 1 mm, and are smaller than the radial height H of the boss 6 and the thickness from the inner wall of the annular groove 7 to the outer wall of the front flat section 4To reduce stress concentration of the boss 6 and thereby improve the service life of the casing.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The utility model provides a realize even receiver structure of compressor radial clearance which characterized in that includes:
the front mounting edge is used for being connected with the low-temperature stator part of the air compressor;
the rear mounting edge is used for being connected with the Gao Wenjing sub-parts;
The straight section is coaxially fixed between the front mounting edge and the rear mounting edge; the straight section comprises a front straight section and a rear straight section, and the front straight section is coaxially and fixedly connected with the end part of the front mounting edge; the rear straight section is coaxially and fixedly connected with the end part of the rear mounting edge;
The boss is arranged on the straight section and is positioned at the joint of the front straight section and the rear straight section, and the boss protrudes out of the casing structure along the radial direction of the straight section; the inner wall of the front straight section is provided with an annular groove at the corresponding position of the rotor blade, the annular groove is circumferentially arranged along the casing structure, a coating is arranged in the annular groove, and the width of the annular groove is as follows Projection length of chord length of blade tip of rotor blade on meridian planeAnd is smaller thanWhereinThe axial overlap length of the boss and the annular grooveThe width of the annular groove is less than or equal toIs 0.5 times that of the above.
2. The receiver structure according to claim 1, wherein the radial height H of the boss is equal to or greater than the thickness from the inner wall of the annular groove to the outer wall of the front straight section1.5 Times of (2).
3. The receiver structure of claim 1, wherein the coating material has a hardness less than a hardness of a rotor blade tip material.
4. The receiver structure of claim 1, wherein the boss overlaps the rear flat section by an axial lengthLess than the axial length of the rear straight sectionIs 0.3 times as large as the above.
5. The casing structure according to claim 1, wherein a first rounded portion is provided at a junction of the boss and the outer wall of the front flat section, a second rounded portion is provided at a junction of the boss and the outer wall of the rear flat section, radii of the first rounded portion and the second rounded portion are 1mm or more, and are smaller than a radial height H of the boss and a thickness from the inner wall of the annular groove to the outer wall of the front flat sectionIs a difference in (c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410524958.4A CN118088491B (en) | 2024-04-29 | 2024-04-29 | Casing structure for realizing uniform radial clearance of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410524958.4A CN118088491B (en) | 2024-04-29 | 2024-04-29 | Casing structure for realizing uniform radial clearance of compressor |
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| Publication Number | Publication Date |
|---|---|
| CN118088491A CN118088491A (en) | 2024-05-28 |
| CN118088491B true CN118088491B (en) | 2024-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410524958.4A Active CN118088491B (en) | 2024-04-29 | 2024-04-29 | Casing structure for realizing uniform radial clearance of compressor |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762568A (en) * | 2017-09-30 | 2018-03-06 | 中国航发沈阳发动机研究所 | Weld the fancase formed |
| CN117189267A (en) * | 2022-05-30 | 2023-12-08 | 中国航发商用航空发动机有限责任公司 | Blade tip clearance structure and air compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52123967A (en) * | 1976-04-12 | 1977-10-18 | Honda Motor Co Ltd | Slotter for assembling blades for outer shell of runner for fluid joint made of sheet metal and device for fixing the blades |
| GB2245312B (en) * | 1984-06-19 | 1992-03-25 | Rolls Royce Plc | Axial flow compressor surge margin improvement |
| JPH10266896A (en) * | 1997-03-26 | 1998-10-06 | Ishikawajima Harima Heavy Ind Co Ltd | Jet engine compressor casing |
| FR2860039B1 (en) * | 2003-09-19 | 2005-11-25 | Snecma Moteurs | REALIZATION OF THE SEAL IN A TURBOJET FOR THE COLLECTION OF DOUBLE-SIDED JOINTS |
| JP2009167971A (en) * | 2008-01-18 | 2009-07-30 | Ihi Corp | Housing fastening method and supercharger |
| CN101691869A (en) * | 2009-10-14 | 2010-04-07 | 清华大学 | Axial and radial flowing compressor with axial chute processor casing structure |
| CN106968986A (en) * | 2017-05-08 | 2017-07-21 | 中国航发湖南动力机械研究所 | Seam processor box and compressor |
| CN210050103U (en) * | 2019-01-24 | 2020-02-11 | 上海海事大学 | Rotatable inner end wall casing for compressor rotor |
| CN215860973U (en) * | 2021-01-18 | 2022-02-18 | 中国航发商用航空发动机有限责任公司 | Compressor rotor blade |
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- 2024-04-29 CN CN202410524958.4A patent/CN118088491B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762568A (en) * | 2017-09-30 | 2018-03-06 | 中国航发沈阳发动机研究所 | Weld the fancase formed |
| CN117189267A (en) * | 2022-05-30 | 2023-12-08 | 中国航发商用航空发动机有限责任公司 | Blade tip clearance structure and air compressor |
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| Publication number | Publication date |
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| CN118088491A (en) | 2024-05-28 |
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