CN114856818A - Variable cycle engine core machine with variable working mode - Google Patents
Variable cycle engine core machine with variable working mode Download PDFInfo
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- CN114856818A CN114856818A CN202210520798.7A CN202210520798A CN114856818A CN 114856818 A CN114856818 A CN 114856818A CN 202210520798 A CN202210520798 A CN 202210520798A CN 114856818 A CN114856818 A CN 114856818A
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- core machine
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- cycle engine
- outer duct
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- 238000007599 discharging Methods 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- 230000000740 bleeding effect Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/057—Control or regulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
- F02K3/02—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber
- F02K3/04—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
- F02K3/075—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type controlling flow ratio between flows
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a variable cycle engine core machine with variable working modes, which comprises: a core machine including an air intake portion and a main body portion; the outer duct is arranged in parallel with the core machine, the air inlet part can be communicated with the inlet end part of the outer duct through the mode selection valve, the main body part is communicated with the middle part of the outer duct through the air discharging device, and the outlet end of the outer duct is provided with an outer duct air discharging device. By opening and closing the mode selection valve and simultaneously matching with the adjustment of the air discharging device and the bypass air discharging device, the conversion of two working modes of single and double bypasses of the core machine and the large-amplitude adjustment of the bypass ratio can be realized.
Description
Technical Field
The invention relates to the technical field of aero-engines, in particular to a variable cycle engine core machine with a variable working mode.
Background
Variable Cycle Engines (VCEs) can vary their thermodynamic cycle parameters, such as pressure ratio, pre-turbine temperature, air flow and bypass ratio, by adjustment of engine variable geometry components to achieve good performance under different operating conditions of the engine. The core engine of the variable cycle engine is the most important component of the variable cycle engine and comprises components and systems with the highest temperature, the highest pressure and the highest rotating speed in the engine, and the performance of the components and the systems has a decisive influence on the engine. In order to better research the working state of the core engine of the variable-cycle engine in the engine, the core engine comprises main components such as a core driving fan (core engine driving fan stage), a gas compressor, a combustion chamber, a high-pressure turbine and the like, and is also provided with a bypass ejector and an outer bypass, the outer bypass can open or close a bypass inlet through a Mode Selection Valve (MSV), the conversion of two working modes of single bypass and double bypass of the core engine is realized, and the adjustment of the bypass ejector can realize the wider adjustment of the bypass ratio of the core engine.
The structural scheme of the existing variable cycle engine only provides the structural scheme of a core machine unit body, and for a 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 mode conversion verification of the core machine can be realized, and test verification of the core machine can be carried out.
The conventional core machine is basically in a single-channel structure type, and can only realize the single-bypass work of the core machine and the adjustment of the bypass ratio in a small range. In order to better simulate the working state of the core machine of the variable-cycle engine in the engine, a novel core machine structure of the variable-cycle engine needs to be established, the conversion work of single and double bypass modes of the core machine can be realized, and meanwhile, the core machine has the large-range adjusting capacity of the bypass ratio. Compared with the conventional core machine, besides the increase of the core driving fan (core machine driving fan stage) for widening the working range, the core machine driving fan needs to be additionally provided with an external culvert passage, an external culvert passage inlet area adjusting device, an external culvert passage outlet area adjusting device, an air discharging device with adjustable back area of the core machine driving fan stage and the like.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide a variable cycle engine core machine with a variable operation mode, so as to meet the requirements of switching the operation modes and adjusting the bypass ratio in a wide range of operation modes of the variable cycle engine core machine.
The embodiment of the specification provides the following technical scheme: a variable cycle engine core machine with variable operating modes, comprising: a core machine including an air intake portion and a main body portion; the outer duct is arranged in parallel with the core machine, the air inlet part can be communicated with the inlet end part of the outer duct through the mode selection valve, the main body part is communicated with the middle part of the outer duct through the air discharging device, and the outlet end of the outer duct is provided with an outer duct air discharging device.
Further, the air inlet part is provided with a first air outlet window communicated with the inlet end part of the bypass, and the mode selection valve comprises a first connecting rod mechanism and a first valve component, wherein the first connecting rod mechanism can drive the first valve component to slide along the circumferential direction of the outer wall of the casing of the air inlet part and control the flow area of the first air outlet window.
Further, the main body portion is provided with a second deflation window, and the deflation means comprises: the gas collecting annular cavity is arranged at the second gas discharging window and can be communicated with the main body part; the inlet end of the air discharging pipe is communicated with the air collecting annular cavity; and the adjusting mechanism is arranged at the outlet end of the air release pipe and can adjust the outlet flow area of the air release pipe.
Furthermore, the main body part and the outlet end of the outer duct are provided with a containing force transmission device.
Furthermore, the containing force transmission device comprises an upper sliding block and a lower sliding block, the upper sliding block is fixedly connected with a casing at the outlet end of the outer duct, the lower sliding block is fixedly connected with the casing of the main body part, and the upper sliding block and the lower sliding block correspond in position and can slide relatively.
Further, the core machine further comprises an intermediate casing, the intermediate casing is provided with a support plate extending in the radial direction, a sealing groove is formed in the end portion of the air inlet portion, and the support plate can be clamped and sealed with the sealing groove.
Further, the core machine comprises a rotor part, and a front bearing device and a rear bearing device which are used for connection are arranged between the rotor part and the main body part.
Further, the outlet end of the outer duct is provided with a third deflation window, the outer duct exhaust device comprises a second link mechanism and a second valve assembly, and the second link mechanism can drive the second valve assembly to slide along the circumferential direction of the outer wall of the outlet end of the outer duct and control the flow area of the third deflation window.
Further, a limiting sliding groove is formed in the third air release window, and the second valve component is arranged in the limiting sliding groove and can slide along the extending direction of the limiting sliding groove.
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: by opening and closing the mode selection valve and simultaneously matching with the adjustment of the air discharging device and the bypass air discharging device, the conversion of two working modes of single and double bypasses of the core machine and the large-amplitude adjustment of the bypass ratio can be realized.
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 diagram of a variable cycle engine core;
FIG. 2 is a schematic illustration of the intake device rear end and mode select valve configuration;
fig. 3 is a schematic view of the structure of the air bleeding device.
Reference numbers in the figures: 1. an air intake device; 2. an intermediary case; 3. a mode selection valve; 4. a core machine driven fan stage; 5. a forepart of the culvert casing; 6. an air release device; 7. a compressor; 8. a main combustion chamber; 9. a back section of the outer culvert casing; 10. a high pressure turbine; 11. a rear bearing case; 12. a culvert force transfer device; 13. an outer culvert exhaust device; 14. a culvert exhaust device; 31. a front support means; 61. a second deflation window; 62. a gas collecting ring cavity; 63. discharging the air pipe; 64. an adjustment mechanism; 111. a rear support device; 121. an upper slide block; 122. a lower slide block; 131. a third deflation window.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 3, an embodiment of the present invention provides a variable cycle engine core machine with a variable operation mode, which includes a core machine and an bypass. The core machine comprises an air inlet part and a main body part; the outer duct is arranged in parallel with the core machine, the air inlet part can be communicated with the inlet end part of the outer duct through the mode selection valve 3, the main body part is communicated with the middle part of the outer duct through the air discharging device 6, and the outlet end of the outer duct is provided with an outer duct air discharging device 13.
By opening and closing the mode selection valve 3 and simultaneously matching with the adjustment of the air bleeder 6 and the bypass exhaust device 13, the conversion of two working modes of single and double bypasses of the core machine and the large adjustment of the bypass ratio can be realized.
The air inlet part is provided with a first air outlet window communicated with the inlet end part of the bypass, and the mode selection valve 3 comprises a first connecting rod mechanism and a first valve component, wherein the first connecting rod mechanism can drive the first valve component to slide along the circumferential direction of the outer wall of the casing of the air inlet part and control the flow area of the first air outlet window.
The mode selection valve 3 adopts the actuating cylinder to push the first connecting rod mechanism and then push the first valve component to slide circumferentially to open and close the first deflation window, and the problem of large requirement on the turnover movement space of the conventional valve is solved.
The main body part is provided with a second bleed window 61, and the bleed device 6 comprises a gas collecting ring chamber 62, a bleed tube 63 and an adjusting mechanism 64. The gas collecting ring cavity 62 is arranged at the second gas discharge window 61 and can be communicated with the main body part; the inlet end of the air discharging pipe 63 is communicated with the air collecting annular cavity 62; the adjustment mechanism 64 is provided at the outlet end of the bleed tube 63 and is capable of adjusting the outlet flow area of the bleed tube 63.
The air flow of the inner culvert channel enters a gas collecting annular cavity 62 through a second gas discharging window 61 on the casing between the core engine driving fan stage 4 and the compressor 7, and a certain number of gas discharging pipes 63 are arranged on the gas collecting annular cavity 62, so that the problem of complex structure of the casing caused by the arrangement of a gas discharging duct after the core engine driving fan stage of the conventional variable cycle engine is solved; the outlet area is adjusted by a set of adjusting mechanism 64 which horizontally pushes, and meanwhile, the horizontally pushing mechanism is simple in structure under the condition of realizing the function, so that the adjustment of the bypass discharge flow is realized, and the bypass ratio of the core engine is adjusted.
The main body part and the outlet end of the outer duct are provided with an inner culvert force transmission device 12. The containing force transmission device 12 comprises an upper slide block 121 and a lower slide block 122, the upper slide block 121 is fixedly connected with a casing at the outlet end of the outer duct, the lower slide block 122 is fixedly connected with the casing of the main body part, and the upper slide block 121 and the lower slide block 122 correspond in position and can slide relatively.
The upper sliding block 121 is connected with the outer culvert casing rear section 9 through a bolt, the lower sliding block 122 is connected with the rear bearing machine casing 11 through a bolt, the upper sliding block 121 and the lower sliding block 122 are in sliding connection, outward transmission of radial load and torque at the rear end of the core machine is achieved, and the problem of force transmission of inner and outer culverts of the double-outer culvert layout core machine is solved.
The core machine further comprises an intermediary casing 2, the intermediary casing 2 is provided with a support plate extending in the radial direction, a sealing groove is formed in the end portion of the air inlet portion, and the support plate can be clamped and sealed with the sealing groove.
The core machine comprises a rotor part, between which a front bearing 31 and a rear bearing 111 are arranged for connection.
The front bearing 31 is arranged in front of the core driven fan stage 4 and the rear bearing 111 is arranged behind the high-pressure turbine 10; the core machine driving fan stage 4, the compressor 7 and the high-pressure turbine 10 form a core machine rotor; the front bearing device 31 adopts a ball bearing to bear all axial force and partial radial force of the rotor; the rear bearing device 111 adopts a rolling rod bearing to bear partial radial force of the rotor; the problems of rotor supporting and force transmission of the core machine are solved.
The outlet end of the outer duct is provided with a third deflation window, the outer duct exhaust device 13 comprises a second link mechanism and a second valve assembly, and the second link mechanism can drive the second valve assembly to slide along the circumferential direction of the outer wall of the outlet end of the outer duct and control the flow area of the third deflation window.
The exhaust area of the bypass exhaust device 13 can be adjusted, the third air release window 131 is arranged on the casing, in the core machine test, the area of the third air release window 131 is adjusted according to the working requirement of the core machine, and the third air release window, the mode selection valve 3 and the air release device 6 work together to realize the mode conversion of the core machine and the adjustment of the bypass ratio.
The third air release window is provided with a limiting sliding groove, and the second valve component is arranged in the limiting sliding groove and can slide along the extending direction of the limiting sliding groove.
The embodiment of the invention can realize the stable work of the core machine under the two working modes of single and double external culvert, and increase the bypass ratio adjusting range of the core machine; the opening and closing of the culvert inlet are realized on the air inlet device, and the refitting of the intermediate casing of the core machine is reduced under the condition of realizing the function; a mode selection valve which slides in the circumferential direction is adopted in the core machine, so that the requirement on the motion space of the valve is reduced; the air bleeding device with a simple structure is adopted, so that the structural design difficulty of a casing and an adjusting mechanism caused by the arrangement of a bleeding duct after the core engine driving fan stage of the conventional variable cycle engine is reduced; set up the orifice plate structure of adjustable area at outer culvert passageway export, when having realized the regulation of core machine culvert flow, reduceed the design degree of difficulty. The variable cycle engine core with the variable working mode provided by the embodiment of the invention fully utilizes the unit body structure of the existing variable cycle engine core, reduces the design difficulty of the variable cycle engine core for experimental verification, shortens the design period of the core and saves the research and development cost.
It should be noted that the variable cycle engine core engine with variable working modes according to the embodiment of the present invention further includes an air intake device 1, an outer culvert casing front section 5, a main combustion chamber 8, and an inner culvert exhaust device 14, and the specific structure and position connection relationship of the above components are the same as those in the prior art, and are not described herein again.
The specific working process is as follows:
the air inlet device 1 introduces an airflow provided by the test run rack into the core machine; when the mode selection valve 3 is opened, one air flow is divided into two air flows in the intermediary casing 2, and the two air flows respectively enter the bypass passage and the bypass passage; an air bleeder 6 with adjustable area is arranged between the core engine driving fan stage 4 and the air compressor 7, and part of air flow entering the inner culvert passage can be led into the outer culvert passage, so that the wider range adjustment of the core engine culvert ratio is realized; a window is arranged on the area-adjustable culvert exhaust device 13, so that the exhaust area can be adjusted; the outer culvert casing rear section 9 is connected with the rear bearing machine casing 11 in a sliding way through an inner culvert force transmission device 12; the core driving fan stage 4, the compressor 7 and the high-pressure turbine 10 are connected to form a shaft, which is supported on the front support device 31 and the rear support device 111.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features, the technical schemes and the technical schemes can be freely combined and used.
Claims (9)
1. A variable cycle engine core machine with variable operating modes, comprising:
a core machine including an air intake portion and a main body portion;
the outer duct is arranged in parallel with the core machine, the air inlet part can be communicated with the inlet end part of the outer duct through a mode selection valve (3), the main body part is communicated with the middle part of the outer duct through an air discharging device (6), and the outlet end of the outer duct is provided with an outer duct air discharging device (13).
2. Variable cycle engine core according to claim 1, wherein the inlet section is provided with a first bleed window communicating with the inlet end of the bypass, the mode selection valve (3) comprising a first linkage able to drive the first valve assembly sliding circumferentially along the outer wall of the casing of the inlet section and controlling the flow area of the first bleed window, and a first valve assembly.
3. Variable cycle engine core according to claim 1, characterized in that said main body is provided with a second bleed window, the bleed means (6) comprising:
a gas collecting annulus (62) disposed at the second bleed window and communicable with the body portion;
an inlet end of the air discharging pipe (63) is communicated with the air collecting annular cavity (62);
and an adjusting mechanism (64) which is provided at the outlet end of the gas release pipe (63) and can adjust the outlet flow area of the gas release pipe (63).
4. The variable cycle engine core with variable operating modes according to claim 1, characterized in that an inner content force transmission device (12) is arranged at the outlet ends of the main body part and the outer duct.
5. The variable cycle engine core machine with variable working modes according to claim 4, wherein the containing force transmission device (12) comprises an upper slide block (121) and a lower slide block (122), the upper slide block (121) is fixedly connected with a casing at the outlet end of the outer duct, the lower slide block (122) is fixedly connected with the casing of the main body part, and the upper slide block (121) and the lower slide block (122) correspond in position and can slide relatively.
6. The variable cycle engine core machine with variable operating modes according to claim 1, characterized in that it further comprises an intermediate casing (2), the intermediate casing (2) being provided with radially extending brackets, the ends of said intake portion being provided with sealing grooves with which said brackets can be snap-sealed.
7. The variable cycle engine core machine with variable operating modes of claim 1, wherein the core machine comprises a rotor portion with front and rear bearings disposed for connection between the rotor portion and the body portion.
8. The variable cycle engine core machine with variable operating mode according to claim 1, characterized in that the outlet end of the bypass is provided with a third bleed window, and the bypass exhaust device (13) comprises a second linkage and a second valve assembly, the second linkage being able to drive the second valve assembly to slide circumferentially along the outer wall of the outlet end of the bypass and to control the flow area of the third bleed window.
9. The variable cycle engine core of claim 8 wherein a check runner is disposed at the third louver, and the second valve assembly is disposed in the check runner and slidable along an extension direction of the check runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210520798.7A CN114856818A (en) | 2022-05-12 | 2022-05-12 | Variable cycle engine core machine with variable working mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210520798.7A CN114856818A (en) | 2022-05-12 | 2022-05-12 | Variable cycle engine core machine with variable working mode |
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| Publication Number | Publication Date |
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| CN114856818A true CN114856818A (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210520798.7A Pending CN114856818A (en) | 2022-05-12 | 2022-05-12 | Variable cycle engine core machine with variable working mode |
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| CN (1) | CN114856818A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115949507A (en) * | 2023-03-09 | 2023-04-11 | 中国航发四川燃气涡轮研究院 | Core machine with air-air heat exchanger and single air source for air supply |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115949507A (en) * | 2023-03-09 | 2023-04-11 | 中国航发四川燃气涡轮研究院 | Core machine with air-air heat exchanger and single air source for air supply |
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