CN115949507A - Core machine with air-air heat exchanger and single air source for air supply - Google Patents
Core machine with air-air heat exchanger and single air source for air supply Download PDFInfo
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- CN115949507A CN115949507A CN202310218516.2A CN202310218516A CN115949507A CN 115949507 A CN115949507 A CN 115949507A CN 202310218516 A CN202310218516 A CN 202310218516A CN 115949507 A CN115949507 A CN 115949507A
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- 238000007789 sealing Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 7
- 230000009466 transformation Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 14
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention provides a core machine with an air-air heat exchanger and a single air source for air supply, which comprises: the inner casing and the outer casing are sleeved at intervals, an inner duct is formed on the inner side of the inner casing, an outer duct is formed between the inner casing and the outer casing, and the inlet of the inner duct and the inlet of the outer duct are both connected with the same gas supply pipeline; and the air-air heat exchanger is arranged in the outer duct, the inlet and the outlet of the air-air heat exchanger are communicated with the inner duct, and the inlet and the outlet of the air-air heat exchanger are sequentially arranged along the gas flowing direction. The embodiment of the invention simulates the working state of a core machine with an air-air heat exchanger in an engine under the condition that a rack does not need to be improved and a single air source supplies air; the unit body structure of the core engine of the existing engine is fully utilized, the design difficulty of rack transformation is reduced, and the design period of the core engine is shortened.
Description
Technical Field
The invention relates to the technical field of aviation gas turbine engines, in particular to a core engine with an air-air heat exchanger and a single air source for air supply.
Background
The gas temperature before the turbine is an important index for measuring the thrust of the aircraft engine. Providing pre-turbine temperature is one of the most effective means of improving the performance of an aircraft engine, and as pre-turbine temperature increases, engine specific thrust increases. Under the condition that the temperature in front of the turbine is increased, the outlet temperature of the compressor is also obviously increased, and under the condition that the working gas temperature and the working cold air temperature of the high-pressure turbine movable blades are simultaneously increased, more cooling capacity needs to be provided to ensure the stable working of the high-pressure turbine movable blades, so that the performance benefit brought by the increase of the temperature in front of the turbine of the engine is reduced; in order to solve the problems, an air-air heat exchanger is additionally arranged on the engine, and the high-pressure turbine cooling air is precooled through the air-air heat exchanger, so that the cooling air temperature of the high-pressure turbine rotor blades is reduced as much as possible under the condition that the temperature in front of the turbine is increased, the cooling air consumption of the high-pressure turbine rotor blades is reduced, and the performance of the engine is better improved.
The structural scheme of the existing engine provides the structural scheme of the core machine unit body, and for the core machine for carrying out test verification, the structural scheme of the core machine which is simple in structural design and small in change amount of the core machine unit body of the engine needs to be provided, so that the test verification requirement of the core machine with the air-air heat exchanger can be met.
The conventional core machine is basically in a single-channel structure type, and if the function and the performance of the air-air heat exchanger are verified on the core machine, a high-pressure air source consistent with the working state point of an engine needs to be independently provided as a cold source, so that great difficulty in rack reconstruction is brought.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide a core machine with an air-air heat exchanger for single air supply, so as to achieve the purpose of implementing test verification of the core machine with the air-air heat exchanger under the condition of single air supply.
The scheme of the invention is a core machine with an air-air heat exchanger and a single air source for air supply, which comprises: the inner casing and the outer casing are sleeved at intervals, an inner duct is formed at the inner side of the inner casing, an outer duct is formed between the inner casing and the outer casing, and the inlet of the inner duct and the inlet of the outer duct are both connected with the same gas supply pipeline; and the air-air heat exchanger is arranged in the outer duct, the inlet and the outlet of the air-air heat exchanger are communicated with the inner duct, and the inlet and the outlet of the air-air heat exchanger are sequentially arranged along the gas flowing direction.
Furthermore, the air-air heat exchanger comprises an air inlet pipeline, a heat exchanger main body and an exhaust pipeline which are sequentially connected, wherein an inlet of the air inlet pipeline is an inlet of the air-air heat exchanger, and an outlet of the exhaust pipeline is an outlet of the air-air heat exchanger.
Further, the intake line includes: the first air guide pipe is connected with the inner casing; and the second air guide pipe is connected with the heat exchanger main body, and the first air guide pipe is connected with the second air guide pipe through a joint component.
Further, the joint assembly includes: the joint body is fixed on the first air guide pipe; and the outer sleeve nut is arranged on the second air entraining pipe, the joint body is connected with the outer sleeve nut in a matching way, and an L-shaped graphite sealing ring is also arranged between the joint body and the outer sleeve nut.
Further, the exhaust line includes: the third air guide pipe is connected with the heat exchanger main body; and the fourth air guide pipe is connected with the inner box, and the third air guide pipe is communicated with the fourth air guide pipe through the adapter pipe.
Furthermore, the exhaust pipeline also comprises a gas collection cavity which is arranged at the outer side of the inner casing, and the adapter tube is connected with the fourth gas guide tube through the gas collection cavity.
Furthermore, an adjustable culvert exhaust device is arranged at the outlet of the outer culvert and can change the outlet area of the outer culvert.
Further, adjustable culvert exhaust apparatus includes: the fixed casing is fixed at the outlet of the outer duct; the adjustable casing is slidably arranged on the outer casing; and the driving component is arranged on the outer casing and is in driving connection with the adjustable casing, and the driving component can drive the adjustable casing to move and change the outlet area between the adjustable casing and the fixed casing.
Further, the driving assembly includes: the first support bracket is fixed on the outer casing; one end of the first support connecting rod is hinged with the first support bracket; one end of the second support connecting rod is hinged with the other end of the first support connecting rod, and the other end of the second support connecting rod is hinged with the adjustable casing; the fixed end of the actuating cylinder is connected with the first support bracket, and the driving end of the actuating cylinder is connected with the other end of the second support connecting rod.
Further, a sealing ring is arranged between the adjustable casing and the outer casing.
Compared with the prior art, the beneficial effects that can be achieved by the at least one technical scheme adopted by the embodiment of the specification at least comprise: the embodiment of the invention simulates the working state of a core machine with an air-air heat exchanger in an engine under the condition that a rack does not need to be improved and a single air source supplies air; the unit body structure of the core engine of the existing engine is fully utilized, the design difficulty of rack transformation is reduced, and the design period of the core engine is shortened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an air-to-air heat exchanger in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of an air inlet part of an air-air heat exchanger in the embodiment of the invention;
FIG. 4 is a schematic view of the structure of an exhaust part of the air-air heat exchanger in the embodiment of the invention;
FIG. 5 is a schematic structural diagram of an adjustable culvert exhaust apparatus in an embodiment of the invention.
Reference numbers in the figures: 12. a back section of the outer culvert casing; 13. an air-to-air heat exchanger; 14. a high pressure turbine vane; 15. a turbine case; 16. a high pressure turbine rotor; 17. a rear bearing case; 18. a culvert force transfer device; 19. an adjustable culvert exhaust device; 20. a culvert air exhausting device; 131. an air intake line; 132. a heat exchanger main body; 133. an exhaust line; 131-1 and a first air guide pipe; 131-2, a joint body; 131-3, an L-shaped graphite sealing ring; 131-4, a nut is sleeved; 131-5 and a second air guide pipe; 133-1 and a third air guide pipe; 133-2, a switching tube; 133-3, a gas collection cavity; 133-4 and a fourth air entraining pipe; 191. a first support bracket; 192. a first support link; 193. a second support link; 194. an actuator cylinder; 195. an adjustable case; 196. a seal ring; 197. fixing a casing;
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. 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.
As shown in fig. 1 to 5, the embodiment of the present invention provides a core machine with an air-to-air heat exchanger for supplying air by a single air supply, which includes an inner casing, an outer casing and an air-to-air heat exchanger 13. The outer casing is sleeved at intervals on the outer side of the inner casing, an inner duct is formed on the inner side of the inner casing, an outer duct is formed between the inner casing and the outer casing, and the inlet of the inner duct and the inlet of the outer duct are both connected with the same gas supply pipeline; the air-air heat exchanger 13 is arranged in the outer duct, the inlet and the outlet of the air-air heat exchanger 13 are both communicated with the inner duct, and the inlet and the outlet of the air-air heat exchanger 13 are sequentially arranged along the gas flow direction.
The embodiment of the invention simulates the working state of a core machine with an air-air heat exchanger in an engine under the condition that a rack does not need to be improved and a single air source supplies air; the unit body structure of the core engine of the existing engine is fully utilized, the design difficulty of rack transformation is reduced, and the design period of the core engine is shortened.
Specifically, the air-air heat exchanger 13 includes an air inlet pipeline 131, a heat exchanger main body 132, and an exhaust pipeline 133, which are connected in sequence, where an inlet of the air inlet pipeline 131 is an inlet of the air-air heat exchanger 13, and an outlet of the exhaust pipeline 133 is an outlet of the air-air heat exchanger 13. And the air intake duct 131 and the air exhaust duct 133 are circumferentially distributed at a plurality of places according to the cooling air flow amount.
As shown in fig. 3, air intake conduit 131 includes a first bleed air conduit 131-1, a second bleed air conduit 131-5, and a fitting assembly. The first bleed air pipe 131-1 is connected with the inner casing; the second bleed air pipe 131-5 is connected with the heat exchanger main body 132, and the first bleed air pipe 131-1 and the second bleed air pipe 131-5 are connected by a joint assembly.
The joint assembly in this embodiment includes: a fitting body 131-2 and a housing nut 131-4. The joint body 131-2 is fixed on the first bleed air pipe 131-1; the outer sleeve nut 131-4 is arranged on the second air entraining pipe 131-5, the connector body 131-2 is connected with the outer sleeve nut 131-4 in a matched mode, and an L-shaped graphite sealing ring 131-3 is further arranged between the connector body 131-2 and the outer sleeve nut 131-4.
A floating sealing structure is formed between the outer sleeve nut 131-4 and the second bleed air pipe 131-5, and the sealing can be effectively realized under the condition that the sealing is ensured.
As shown in fig. 4, the exhaust duct 133 in the embodiment of the present invention includes a third bleed air pipe 133-1, a transition pipe 133-2, a plenum 133-3, and a fourth bleed air pipe 133-4. The third bleed air duct 133-1 is connected to the heat exchanger main body 132; the fourth bleed air pipe 133-4 is connected with the inner casing, and the third bleed air pipe 133-1 is communicated with the fourth bleed air pipe 133-4 through a switching pipe 133-2. The gas collecting cavity 133-3 is arranged at the outer side of the inner casing, and the adapter tube 133-2 is connected with the fourth bleed air tube 133-4 through the gas collecting cavity 133-3.
The adapter pipe 133-2 and the third air guide pipe 133-1 and the air collecting cavity 133-3 are connected in a ball head connection mode, and axial, circumferential and radial deformation can be compensated under the condition that sealing is guaranteed. The gas collecting cavity 133-3 is of a whole ring structure; the fourth bleed conduit 133-4 is flanged to the mounting edge of the turbine casing 15.
As shown in fig. 1 and 5, an adjustable culvert exhaust device 19 is arranged at the outlet of the outer culvert, and the adjustable culvert exhaust device 19 can change the outlet area of the outer culvert.
Thereby make the exit area of outer duct change according to the demand of difference through setting up adjustable outer culvert exhaust apparatus 19, can realize the regulatory action of cooling gas flow.
Adjustable culvert bleed 19 includes a stationary casing 197, an adjustable casing 195, and a drive assembly. A fixed casing 197 is fixed at the outlet of the outer duct; the adjustable casing 195 is slidably disposed on the outer casing; the driving component is arranged on the outer casing and is in driving connection with the adjustable casing 195, and the driving component can drive the adjustable casing 195 to move and change the outlet area between the adjustable casing 195 and the fixed casing 197.
The adjustable casing 195 is driven by the driving component to move, so that the outlet area between the adjustable casing 195 and the fixed casing 197 is changed, the outlet flow area of the bypass can be changed, and the purpose of adjusting the bypass channel flow is further achieved.
Specifically, the drive assembly includes a first support bracket 191, a first support link 192, a second support link 193, and a ram 194. The first support bracket 191 is fixed on the outer casing; one end of the first support link 192 is hinged to the first support bracket 191; one end of the second support link 193 is hinged with the other end of the first support link 192, and the other end of the second support link 193 is hinged with the adjustable casing 195; the fixed end of the actuator cylinder 194 is connected to the first support bracket 191, and the driving end of the actuator cylinder 194 is connected to the other end of the second support link 193.
The first support bracket 191, the first support link 192 and the second support link 193 form a support system of the adjustable bypass exhaust device 19, and ensure circumferential and radial positioning of the adjustable casing 195.
In operation, the driving end of the actuator 194 moves to the right in fig. 5, thereby driving the other end of the second support link 193 and the adjustable casing 195 to move, and further realizing adjustment of the increase of the outlet area of the bypass channel. Otherwise, the reduction of the outlet area of the culvert channel can be adjusted. In the embodiment, two driving assemblies are arranged at intervals along the circumferential direction.
A sealing ring 196 is disposed between the adjustable casing 195 and the outer casing. The seal between the adjustable casing 195 and the culvert casing aft section 12 is a floating seal, using two seal rings 196 for sealing.
As shown in fig. 1, the embodiment of the present invention further includes a flow tube, a splitter ring, an air inlet outer casing, an air inlet inner casing, an air inlet connecting casing, an air inlet cone, an intermediate casing, an air compressor rotor, an air compressor stator, an outer culvert casing front section, a main combustion chamber, an outer culvert casing rear section 12, a high pressure turbine guide vane 14, a turbine casing 15, a high pressure turbine rotor 16, a rear bearing casing 17, an inner culvert power transmission device 18, and an inner culvert exhaust device 20. The above components are conventional components, and the structure and the position relationship thereof are not described in detail herein.
The flow tube introduces a flow of air flow provided by the test run rack into the core machine; dividing the flow dividing ring into two air flows which respectively enter an outer culvert passage and an inner culvert passage; an air-air heat exchanger 13 is arranged in a main combustion chamber outer culvert passage, a part of air flow entering the inner culvert passage can be introduced into the air-air heat exchanger 13, the introduced air flow is cooled by the air in the outer culvert passage, and the cooled air passes through a turbine casing 15 and a high-pressure turbine guide vane 14 through a pipeline and then enters a high-pressure turbine rotor 16 to cool the high-pressure turbine rotor blade; and an adjustable culvert exhaust device 19 is arranged at the outlet of the culvert passage, and the flow of the culvert passage is adjusted by adjusting the area of the outlet of the culvert passage, so that the cooling air required by the air-air heat exchanger 13 is ensured.
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 (10)
1. A core machine with an air-to-air heat exchanger for supplying air from a single source, comprising:
the inner casing and the outer casing are sleeved at the outer side of the inner casing at intervals, an inner duct is formed at the inner side of the inner casing, an outer duct is formed between the inner casing and the outer casing, and the inlet of the inner duct and the inlet of the outer duct are both connected with the same gas supply pipeline;
and the air-air heat exchanger (13) is arranged in the outer duct, the inlet and the outlet of the air-air heat exchanger (13) are communicated with the inner duct, and the inlet and the outlet of the air-air heat exchanger (13) are sequentially arranged along the gas flowing direction.
2. The core machine with air-air heat exchanger fed by a single air supply according to claim 1, characterized in that the air-air heat exchanger (13) comprises an air inlet pipeline (131), a heat exchanger body (132) and an air outlet pipeline (133) which are connected in sequence, wherein the inlet of the air inlet pipeline (131) is the inlet of the air-air heat exchanger (13), and the outlet of the air outlet pipeline (133) is the outlet of the air-air heat exchanger (13).
3. Core machine with air-to-air heat exchanger fed by a single air supply according to claim 2, characterized in that the air intake circuit (131) comprises:
the first air guide pipe (131-1) is connected with the inner box;
and the second bleed air pipe (131-5) is connected with the heat exchanger main body (132), and the first bleed air pipe (131-1) and the second bleed air pipe (131-5) are connected through a joint component.
4. The core machine with air-to-air heat exchanger for single air supply of claim 3, wherein said joint assembly comprises:
the joint body (131-2) is fixed on the first air guide pipe (131-1);
the outer sleeve nut (131-4) is arranged on the second air guide pipe (131-5), the joint body (131-2) is connected with the outer sleeve nut (131-4) in a matched mode, and an L-shaped graphite sealing ring (131-3) is further arranged between the joint body (131-2) and the outer sleeve nut (131-4).
5. Core machine with air-to-air heat exchanger fed by a single air supply according to claim 2, characterized in that the exhaust duct (133) comprises:
a third bleed air pipe (133-1) connected to the heat exchanger main body (132);
and the fourth air guide pipe (133-4) is connected with the inner box, and the third air guide pipe (133-1) is communicated with the fourth air guide pipe (133-4) through a switching pipe (133-2).
6. The core machine with air-to-air heat exchanger fed by a single air supply according to claim 5, characterized in that the exhaust duct (133) further comprises a gas collecting chamber (133-3) arranged outside the inner casing, the adapter tube (133-2) being connected to the fourth bleed air tube (133-4) via the gas collecting chamber (133-3).
7. Core machine with air-air heat exchanger fed by a single source, according to claim 1, characterized in that the outlet of the outer duct is provided with an adjustable outer duct exhaust (19), the adjustable outer duct exhaust (19) being able to vary the outlet area of the outer duct.
8. Core machine with air-to-air heat exchanger fed by a single source according to claim 7, characterized in that the adjustable bypass exhaust (19) comprises:
a fixed casing (197) fixed at an outlet of the outer duct;
an adjustable case (195) slidably disposed on the outer case;
and the driving component is arranged on the outer casing and is in driving connection with the adjustable casing (195), and the driving component can drive the adjustable casing (195) to move and change the outlet area between the adjustable casing (195) and the fixed casing (197).
9. The core machine with air-to-air heat exchanger for single air supply of claim 8, wherein said drive assembly comprises:
a first support bracket (191) fixed to the outer case;
a first support link (192) having one end hinged to the first support bracket (191);
one end of the second support connecting rod (193) is hinged with the other end of the first support connecting rod (192), and the other end of the second support connecting rod (193) is hinged with the adjustable casing (195);
and the fixed end of the actuating cylinder (194) is connected with the first support bracket (191), and the driving end of the actuating cylinder (194) is connected with the other end of the second support connecting rod (193).
10. The core machine with air-to-air heat exchanger for single air supply gas according to claim 8, characterized in that a sealing ring (196) is provided between the adjustable casing (195) and the outer casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310218516.2A CN115949507A (en) | 2023-03-09 | 2023-03-09 | Core machine with air-air heat exchanger and single air source for air supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310218516.2A CN115949507A (en) | 2023-03-09 | 2023-03-09 | Core machine with air-air heat exchanger and single air source for air supply |
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| CN115949507A true CN115949507A (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310218516.2A Pending CN115949507A (en) | 2023-03-09 | 2023-03-09 | Core machine with air-air heat exchanger and single air source for air supply |
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Cited By (1)
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| CN118088792A (en) * | 2024-04-22 | 2024-05-28 | 成都中科翼能科技有限公司 | Bleed air assembly of double-layer runner casing of gas turbine |
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