CN108716423B - Sealing structure for fish mouth between turbine rotor and stator of gas turbine - Google Patents
Sealing structure for fish mouth between turbine rotor and stator of gas turbine Download PDFInfo
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- CN108716423B CN108716423B CN201810431123.9A CN201810431123A CN108716423B CN 108716423 B CN108716423 B CN 108716423B CN 201810431123 A CN201810431123 A CN 201810431123A CN 108716423 B CN108716423 B CN 108716423B
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- fish mouth
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- mouth sealing
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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
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention provides a fish mouth sealing structure between turbine rotors and stators of a gas turbine, which is formed by matching a turbine guider inner ring outlet mounting edge, a turbine rotor inner ring front edge wall surface and an auxiliary fish mouth sealing conical cylinder, wherein the turbine guider inner ring outlet mounting edge is a simple annular flat plate, and bosses are uniformly distributed on one side of the simple annular flat plate in the circumferential direction; a vertical ring plate and a horizontal ring plate are arranged at the maximum radius of the auxiliary fish mouth sealing conical cylinder, a groove is formed in the vertical ring plate and is matched with a boss of an inner ring outlet mounting edge of the turbine guider, the turbine guider is prevented from rotating in the circumferential direction, and the minimum radius of the auxiliary fish mouth sealing conical cylinder is fixed on a static part through a bolt; high pressure gas that seals flows out to the mainstream passageway through fish mouth structure that seals, prevents that high temperature gas from invading inside. The sealing structure improves the sealing effect between the high-pressure turbine guide devices, reduces the processing difficulty of the sealing structure, and also reduces the thermal stress of the rear mounting edge of the inner ring of the high-pressure turbine guide device, thereby improving the performance and the competitiveness of an engine.
Description
Technical Field
The invention relates to the field of turbines of high-temperature components of gas turbines, in particular to a sealing structure, and particularly relates to a novel fish mouth sealing structure between a turbine guider and a turbine rotor.
Background
A gap exists between the high-pressure turbine and the turbine rotor, and a sealing structure is usually designed at the gap to prevent main flow gas from flowing backwards. The gas flows backward to cause serious damage, so that the heat exchange condition of the turbine disc is severe, the expansion amount of the rotor and the stator is inconsistent, the overall efficiency of the engine is reduced, and even serious accidents are caused. The sealing structure has a plurality of types, wherein the sealing effect of the fish mouth sealing structure is good and the fish mouth sealing structure is widely used. But the structure that current fish mouth was sealed is complicated, and the integration processing has increased the technology degree of difficulty, and the fish mouth structure that seals that forms through the mode cooperation of bolt-up can increase thermal stress.
Disclosure of Invention
Aiming at the defects and shortcomings of the existing fish mouth sealing structure, the invention aims to provide a novel fish mouth sealing structure for a turbine rotor-stator of a gas turbine, and by introducing an auxiliary fish mouth sealing conical barrel, the sealing effect of the high-pressure turbine rotor-stator is improved, the processing difficulty of the sealing structure is reduced, the thermal stress of the rear mounting edge of the inner ring of the high-pressure turbine stator is also reduced, and the processing difficulty of a complex structure is also reduced, so that the overall performance and the competitiveness of an engine are improved.
In order to realize the technical aim, the technical scheme adopted by the invention is as follows:
a fish mouth sealing structure between a turbine rotor and a stator of a gas turbine comprises a turbine guider, an auxiliary fish mouth sealing conical cylinder, a turbine rotor and a stator casing, and is characterized in that,
the turbine guider comprises a plurality of turbine guider blades distributed along the circumferential direction of the turbine guider, the outlet wall surface of the inner ring of the turbine guider, the outlet mounting edge sealing hole of the turbine guider and an anti-rotation boss,
the auxiliary fish mouth sealing conical cylinder comprises a vertical annular plate, a horizontal annular plate, an auxiliary fish mouth sealing conical cylinder sealing hole, an anti-rotation groove and an auxiliary fish mouth sealing conical cylinder mounting edge,
the turbine rotor comprises a sealing tongue which is arranged on the front edge of an inner ring of the turbine rotor and protrudes outwards, a turbine disk of the turbine rotor and a plurality of turbine rotor blades which are distributed along the circumferential direction of the turbine disk,
the stator casing is provided with a stator casing mounting edge,
wherein the content of the first and second substances,
the turbine guider inner ring outlet mounting edge is an annular flat plate arranged on the inner side of the wall surface of the turbine guider inner ring outlet, a plurality of anti-rotation bosses are uniformly distributed on the rear side of the annular flat plate along the circumferential direction, and a plurality of turbine guider outlet mounting edge sealing holes are formed in the turbine guider inner ring outlet mounting edge along the circumferential direction;
the vertical annular plate and the horizontal annular plate are arranged at the position with the maximum radius of the auxiliary fish mouth sealing conical cylinder, a plurality of anti-rotation grooves are formed in the vertical annular plate and are matched with the anti-rotation bosses on the outlet mounting edge of the inner ring of the turbine guider one by one to prevent the turbine guider from rotating circumferentially, a plurality of auxiliary fish mouth sealing conical cylinder sealing holes are formed in the vertical annular plate circumferentially, and the auxiliary fish mouth sealing conical cylinder sealing holes are identical to and correspond to the sealing holes of the outlet mounting edge of the turbine guider in circumferential positions one by one; the minimum radius of the auxiliary fish mouth sealing conical barrel is provided with an auxiliary fish mouth sealing conical barrel mounting edge, and the auxiliary fish mouth sealing conical barrel mounting edge is fixedly mounted on the stator casing mounting edge through a fastener;
the sealing tongue at the front edge of the inner ring of the turbine rotor is arranged between the wall surface of the outlet of the inner ring of the turbine guider and the horizontal ring plate of the auxiliary fish mouth sealing conical cylinder to form a fish mouth sealing structure;
the high-pressure sealing gas is divided into two paths, the high-pressure sealing gas is led from the high-pressure compressor all the way, the high-pressure sealing gas of the path passes through the space between the auxiliary fish mouth sealing conical cylinder and the high-pressure turbine rotor disc and passes through the fish mouth sealing structure and then enters the main flow channel, the high-pressure sealing gas of the other path is led from two air flows of the combustion chamber, and the high-pressure sealing gas of the path passes through the sealing holes on the auxiliary fish mouth sealing conical cylinder and the turbine guider outlet mounting edge and passes through the fish mouth sealing structure to flow out of the main flow channel, so that the high-temperature gas is prevented from invading the inside.
Preferably, the auxiliary fish mouth sealing conical cylinder sealing hole and the high-pressure turbine guider outlet mounting edge sealing hole are arranged close to the low radius part.
Optionally, the anti-rotation boss on the turbine guider inner ring outlet mounting edge is matched with the anti-rotation groove on the auxiliary fish mouth sealing conical cylinder one by one, or the anti-rotation boss and the anti-rotation groove are oppositely arranged on the turbine guider inner ring outlet mounting edge and the auxiliary fish mouth sealing conical cylinder.
Preferably, the anti-rotation boss is in clearance fit with the anti-rotation groove, and the clearance dimension is about 0.5 mm.
Optionally, the number of the anti-rotation bosses and the anti-rotation grooves is 2-3.
Preferably, the radial position of the sealing tongue at the front edge of the inner ring of the turbine rotor is closer to the horizontal ring cylinder of the auxiliary fish mouth sealing conical cylinder, so that the high-pressure turbine rotor is prevented from being large in expansion amount under the high-temperature condition and colliding and grinding with a high-pressure turbine guider.
Preferably, the auxiliary fish mouth sealing conical cylinder is of a thin-wall structure, and the thickness of the auxiliary fish mouth sealing conical cylinder is about 0.8 mm.
Optionally, the minimum radius of the auxiliary fish mouth sealing conical cylinder is fixed on the mounting edge of the stator casing in a bolt or sleeve mode.
According to another aspect of the invention, a gas turbine with the fish mouth sealing structure is further provided.
Compared with the prior structure, the fish mouth sealing structure between the turbine rotor and the stator has the following advantages: (1) the fish mouth sealing structure is formed by the auxiliary fish mouth sealing conical barrel, so that the processing difficulty of the integrated fish mouth sealing structure is reduced; (2) the auxiliary fish mouth sealing conical cylinder is fixed on the mounting edge of the stator casing through a structure at the lowest radius part, and is not directly fixed on the mounting edge of the inner ring of the turbine guider through bolts, so that the thermal stress of the mounting edge of the inner ring under the high-temperature condition is reduced; (3) part of the sealing flow flows through a sealing hole matched with the turbine guider inner ring mounting edge and the vertical annular plate for assisting the fish mouth in sealing, so that the sealing effect of the fish mouth in sealing is improved; (4) the auxiliary fish mouth sealing conical barrel can be detached and replaced to adapt to different fluid environments, and the optimal sealing effect is achieved.
Drawings
FIG. 1 is a schematic view of a fish mouth sealing structure between turbine rotors and stators of a gas turbine according to the present invention;
FIG. 2 is a schematic structural view of an auxiliary fish mouth sealing cone;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 2;
FIG. 4 is a schematic view of a high pressure turbine nozzle;
3 fig. 3 5 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 at 3 a 3- 3 a 3 in 3 fig. 3 4 3. 3
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples, which are illustrative of the present invention and are not to be construed as limiting the present invention.
As shown in FIG. 1, the fish mouth sealing structure between the high-pressure turbine stages of the gas turbine comprises a high-pressure turbine guider 1, an auxiliary fish mouth sealing conical barrel 2, a high-pressure turbine rotor 3 and a stator casing 4. As shown in fig. 1 to 3, the high-pressure turbine guider 1 includes a plurality of high-pressure turbine guider blades 104 distributed along the circumferential direction thereof, a high-pressure turbine guider inner ring outlet wall surface 101, a high-pressure turbine guider outlet mounting edge 102, a high-pressure turbine guider outlet mounting edge sealing hole 103, and an anti-rotation boss 105. As shown in fig. 1, 4 and 5, the auxiliary fish mouth sealing conical cylinder 2 comprises a vertical ring plate 201, a horizontal ring plate 202, an auxiliary fish mouth sealing conical cylinder sealing hole 203, an anti-rotation groove 204 and an auxiliary fish mouth sealing conical cylinder mounting edge 205. As shown in fig. 1, the high-pressure turbine rotor 3 includes a sealing tongue 301 disposed at a leading edge thereof and protruding outward, a high-pressure turbine rotor turbine disk 302, and a plurality of high-pressure turbine rotor blades 303 distributed along a circumferential direction thereof; a stator casing mounting edge 401 is arranged on the stator casing 4; the outlet wall surface 101 of the inner ring of the high-pressure turbine guider, the horizontal ring plate 202 of the auxiliary fish mouth sealing conical cylinder and the sealing tongue 301 of the high-pressure turbine rotor are matched to form a fish mouth sealing structure.
The turbine stator turbine guider inner ring outlet mounting edge 102 is a simple annular flat plate arranged on the inner side of the turbine guider inner ring outlet wall surface 101, a plurality of anti-rotation bosses 105 are uniformly distributed on the rear side of the annular flat plate along the circumferential direction, and a plurality of turbine guider outlet mounting edge sealing holes 103 are formed in the turbine guider inner ring outlet mounting edge 102 along the circumferential direction. An auxiliary fish mouth sealing conical cylinder mounting edge 205 is arranged at the minimum radius of the auxiliary fish mouth sealing conical cylinder 2 and can be fixed on a stator casing mounting edge 401 of the stator casing 4 in a bolt fastening mode. The maximum radius department of supplementary fish mouth conical cylinder 2 of obturating is equipped with vertical crown plate 201 and horizontal crown plate 202, and processing has prevented changeing recess 204 on the vertical crown plate 201, prevents changeing recess 204 axial and evenly arranging threely, is equipped with a plurality of supplementary fish mouth conical cylinder sealing holes 203 along circumference on the vertical crown plate 201, and supplementary fish mouth conical cylinder sealing holes 203 and the same and the one-to-one in turbine director export installation limit sealing hole 103's circumferential position. The anti-rotation grooves 204 are matched with the anti-rotation bosses 105 on the outlet mounting edge 102 of the high-pressure turbine guider one by one, so that the auxiliary fish mouth wind pressure cone 2 is matched with the high-pressure turbine guider 1. The auxiliary fish mouth sealing conical cylinder 2 replaces the original bolt fixing mode through an anti-rotation groove mode, and the thermal stress generated by the two parts due to different thermal expansion amounts at high temperature is reduced. In order to improve the sealing effect of the fish mouth, sealing holes are processed on the vertical annular plate 201 of the auxiliary fish mouth sealing conical cylinder and the outlet mounting edge 102 of the high-pressure turbine guider, and the circumferential positions of the two sealing holes are the same and are in one-to-one correspondence.
Dotted arrows are a high-pressure sealing gas i and a high-pressure sealing gas ii respectively, the high-pressure sealing gas i is led from the high-pressure compressor, and the high-pressure sealing gas ii is led from two air flows of the combustion chamber. The high-pressure sealing gas i enters the main flow from the high-pressure compressor through the space between the auxiliary fish mouth sealing conical barrel 2 and the high-pressure turbine rotor disc 302 and through the fish mouth sealing structure, and the sealing effect is achieved. The fish mouth is sealed and is a high-efficient structure of obturating, nevertheless because high pressure turbine interstage circumferential pressure distributes unevenly, and it is high to be close to pressure surface exit pressure, still has the danger of high temperature gas invasion. Through arranging the second stream of gas of obturating to reduce the danger of high temperature gas invasion, high pressure gas ii of obturating draws from two streams of air currents of combustion chamber, and its pressure is higher, and supplementary fish mouth sealing awl section of thick bamboo obturating hole 203 and the position of high pressure turbine guider export installation limit obturating hole 103 are close to high pressure turbine guider pressure surface position, and gas ii of obturating enters into the fish mouth structure of obturating through the hole of obturating, further improves the effect of obturating. The auxiliary fish mouth sealing conical cylinder sealing hole 203 and the high-pressure turbine guider outlet mounting edge sealing hole 103 are close to the low-radius part, the kinetic energy of high-temperature gas is reduced, and the sealing effect is better. The radial position of the sealing tongue 301 at the front edge of the inner ring of the turbine rotor is closer to the horizontal ring cylinder 202 of the auxiliary fish mouth sealing conical cylinder, so that the high-pressure turbine rotor is prevented from being greatly expanded under the high-temperature condition and colliding and grinding with the high-pressure turbine guider 1.
In conclusion, the structure of the mounting edge of the front edge of the gas turbine guider changes the cooling mode, greatly improves the cooling effect on the inner ring and the outer ring of the guider, reduces the using amount of cooling gas, and has positive help effect on improving the performance and the efficiency of an engine.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes in the structure, characteristics and principles of the inventive concept are included in the scope of protection of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. A fish mouth sealing structure between a turbine rotor and a stator of a gas turbine comprises a turbine guider, an auxiliary fish mouth sealing conical cylinder, a turbine rotor and a stator casing, and is characterized in that,
the turbine guider comprises a plurality of turbine guider blades distributed along the circumferential direction of the turbine guider, the outlet wall surface of the inner ring of the turbine guider, the outlet mounting edge sealing hole of the turbine guider and an anti-rotation boss,
the auxiliary fish mouth sealing conical cylinder comprises a vertical annular plate, a horizontal annular plate, an auxiliary fish mouth sealing conical cylinder sealing hole, an anti-rotation groove and an auxiliary fish mouth sealing conical cylinder mounting edge,
the turbine rotor comprises a sealing tongue which is arranged on the front edge of an inner ring of the turbine rotor and protrudes outwards, a turbine disk of the turbine rotor and a plurality of turbine rotor blades which are distributed along the circumferential direction of the turbine disk,
the stator casing is provided with a stator casing mounting edge,
wherein the content of the first and second substances,
the turbine guider inner ring outlet mounting edge is an annular flat plate arranged on the inner side of the wall surface of the turbine guider inner ring outlet, a plurality of anti-rotation bosses are uniformly distributed on the rear side of the annular flat plate along the circumferential direction, and a plurality of turbine guider outlet mounting edge sealing holes are formed in the turbine guider inner ring outlet mounting edge along the circumferential direction;
the vertical annular plate and the horizontal annular plate are arranged at the position with the maximum radius of the auxiliary fish mouth sealing conical cylinder, a plurality of anti-rotation grooves are formed in the vertical annular plate and are matched with the anti-rotation bosses on the outlet mounting edge of the inner ring of the turbine guider one by one to prevent the turbine guider from rotating circumferentially, a plurality of auxiliary fish mouth sealing conical cylinder sealing holes are formed in the vertical annular plate circumferentially, and the auxiliary fish mouth sealing conical cylinder sealing holes are identical to and correspond to the sealing holes of the outlet mounting edge of the turbine guider in circumferential positions one by one; the minimum radius of the auxiliary fish mouth sealing conical barrel is provided with an auxiliary fish mouth sealing conical barrel mounting edge, and the auxiliary fish mouth sealing conical barrel mounting edge is fixedly mounted on the stator casing mounting edge through a fastener;
the sealing tongue at the front edge of the inner ring of the turbine rotor is arranged between the wall surface of the outlet of the inner ring of the turbine guider and the horizontal ring plate of the auxiliary fish mouth sealing conical cylinder to form a fish mouth sealing structure;
the high-pressure sealing gas is divided into two paths, the high-pressure sealing gas is led from the high-pressure compressor all the way, the high-pressure sealing gas of the path passes through the space between the auxiliary fish mouth sealing conical cylinder and the high-pressure turbine rotor disc and passes through the fish mouth sealing structure and then enters the main flow channel, the high-pressure sealing gas of the other path is led from two air flows of the combustion chamber, and the high-pressure sealing gas of the path passes through the sealing holes on the auxiliary fish mouth sealing conical cylinder and the turbine guider outlet mounting edge and passes through the fish mouth sealing structure to flow out of the main flow channel, so that the high-temperature gas is prevented from invading the inside.
2. The fish mouth sealing structure of claim 1, wherein the auxiliary fish mouth sealing cone sealing hole and the turbine guide outlet mounting edge sealing hole are arranged near the low radius.
3. The fish mouth sealing structure of claim 1, wherein the anti-rotation boss is in clearance fit with the anti-rotation groove, and the clearance dimension is about 0.5 mm.
4. The fish mouth sealing structure of claim 1, wherein the number of the anti-rotation bosses and the anti-rotation grooves is 2-3.
5. The fish mouth sealing structure of claim 1, wherein the radial position of the sealing tongue at the leading edge of the inner ring of the turbine rotor is closer to the horizontal ring plate of the auxiliary fish mouth sealing cone.
6. The fish mouth sealing structure of claim 1, wherein the auxiliary fish mouth sealing cone is a thin-walled structure with a thickness of about 0.8 mm.
7. The fish mouth sealing structure of claim 1, wherein the auxiliary fish mouth sealing cone is fixed on the stator casing mounting edge at the minimum radius by means of a bolt or a sleeve.
8. A gas turbine having the fish mouth sealing structure of any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810431123.9A CN108716423B (en) | 2018-05-08 | 2018-05-08 | Sealing structure for fish mouth between turbine rotor and stator of gas turbine |
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| CN201810431123.9A CN108716423B (en) | 2018-05-08 | 2018-05-08 | Sealing structure for fish mouth between turbine rotor and stator of gas turbine |
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| CN108716423A CN108716423A (en) | 2018-10-30 |
| CN108716423B true CN108716423B (en) | 2020-06-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109630210B (en) * | 2018-12-17 | 2021-09-03 | 中国航发沈阳发动机研究所 | Nozzle sealing structure and aircraft engine with same |
| CN109404051B (en) * | 2018-12-29 | 2021-10-26 | 中国科学院工程热物理研究所 | Floating positioning and torque transmission structure of turbine guider |
| CN114526161B (en) * | 2022-04-22 | 2022-07-08 | 成都中科翼能科技有限公司 | Gas turbine's intermediary machine casket and reinforcement structure thereof |
| CN114857142B (en) * | 2022-05-12 | 2023-05-05 | 中国航发四川燃气涡轮研究院 | Connection structure between different material components |
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| JP2007146787A (en) * | 2005-11-29 | 2007-06-14 | Mitsubishi Heavy Ind Ltd | Gas turbine |
| JP2010077868A (en) * | 2008-09-25 | 2010-04-08 | Mitsubishi Heavy Ind Ltd | Rim seal structure of gas turbine |
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| CN107060899A (en) * | 2016-02-10 | 2017-08-18 | 通用电气公司 | Gas-turbine unit with edge seal between rotor and stator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2841591B1 (en) * | 2002-06-27 | 2006-01-13 | Snecma Moteurs | VENTILATION CIRCUITS OF THE TURBINE OF A TURBOMACHINE |
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| JP2007146787A (en) * | 2005-11-29 | 2007-06-14 | Mitsubishi Heavy Ind Ltd | Gas turbine |
| JP2010077868A (en) * | 2008-09-25 | 2010-04-08 | Mitsubishi Heavy Ind Ltd | Rim seal structure of gas turbine |
| CN104704201A (en) * | 2012-08-03 | 2015-06-10 | 通用电气公司 | Systems and apparatus relating to seals for turbine engines |
| CN107060899A (en) * | 2016-02-10 | 2017-08-18 | 通用电气公司 | Gas-turbine unit with edge seal between rotor and stator |
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