CN111207005A - Variable cycle engine mode control mechanism and intermediate casing structure with same - Google Patents
Variable cycle engine mode control mechanism and intermediate casing structure with same Download PDFInfo
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- CN111207005A CN111207005A CN202010092709.4A CN202010092709A CN111207005A CN 111207005 A CN111207005 A CN 111207005A CN 202010092709 A CN202010092709 A CN 202010092709A CN 111207005 A CN111207005 A CN 111207005A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 24
- 238000003754 machining Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 230000000694 effects 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
- 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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- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/26—Double casings; Measures against temperature strain in casings
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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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- 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 application belongs to the field and changes cycle engine mode selection design technique, concretely relates to change cycle engine mode control mechanism, includes: one end of each valve plate connecting rod is correspondingly hinged to one valve plate; the linkage ring is sleeved on the outer casing of the intermediate casing and is hinged with the other end of each valve plate connecting rod; and a piston rod of the actuating cylinder is connected with the linkage ring so as to drive the linkage ring to move along the axial direction, so that each valve plate connecting rod moves, and each valve plate rotates to be synchronously in an opening state or a closing state. And to an intermediate casing structure having the variable cycle engine mode control mechanism.
Description
Technical Field
The application belongs to the field of variable cycle engine mode selection design technology, and particularly relates to a variable cycle engine mode control mechanism and an intermediary casing structure with the same.
Background
The variable cycle aircraft engine medium casing usually comprises an inner duct leading to the core engine and an outer duct leading to the tail nozzle on a flow channel, when large thrust is needed, a valve plate is closed to close the outer duct, so that the outlet airflow of the low-pressure compressor completely flows to the core engine through the inner duct, and at the moment, the engine is in a 'turbojet' working mode, namely a single-duct working mode; when the cruise is carried out, the valve plate is opened to open the outer duct, so that the airflow at the outlet of the low-pressure compressor passes through the inner duct and the outer duct in a certain proportion without being blocked and flows to the core machine and the tail nozzle, and at the moment, the engine is in a turbofan working mode, namely a double-duct working mode.
At present, a mechanism which can efficiently and quickly control the conversion of the variable-cycle aero-engine in a single-duct working mode and a double-duct working mode is lacked.
The present application is made in view of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The application aims to provide a mode control mechanism of a variable-cycle engine and an intermediate casing structure with the mode control mechanism, so that the mode control mechanism can efficiently and quickly control the variable-cycle aero-engine to be switched between a single-duct working mode and a double-duct working mode.
The technical scheme of the application is as follows:
one aspect provides a variable cycle engine mode control mechanism comprising:
one end of each valve plate connecting rod is correspondingly hinged to one valve plate;
the linkage ring is sleeved on the outer casing of the intermediate casing and is hinged with the other end of each valve plate connecting rod;
and a piston rod of the actuating cylinder is connected with the linkage ring so as to drive the linkage ring to move along the axial direction, so that each valve plate connecting rod moves, and each valve plate rotates to be synchronously in an opening state or a closing state.
According to at least one embodiment of the present application, each of the sheet links includes:
one end of the first connecting rod is correspondingly hinged to one valve plate;
one end of the second connecting rod is hinged with the linkage ring, and the other end of the second connecting rod is in threaded fit connection with the other end of the first connecting rod.
According to at least one embodiment of the present application, further comprising:
the mounting seats are used for being arranged on an outer casing of the intermediate casing, a rotating shaft is arranged on each mounting seat, each rotating shaft is used for being correspondingly hinged with one valve plate, and each valve plate can rotate around the corresponding rotating shaft.
According to at least one embodiment of the present application, further comprising:
a plurality of support platforms for mounting on the outer case of the intermediate case for supporting the link ring.
Another aspect provides an intermediate casing structure, including:
the intermediate casing outer casing is provided with a plurality of accommodating grooves;
an intermediate case inner case disposed inside the intermediate case outer case;
one end of each support plate is connected with the inner side of the intermediate casing outer casing, and the other end of each support plate is connected with the intermediate casing inner casing;
a shunt ring arranged between the intermediate casing outer casing and the intermediate casing inner casing;
a plurality of valve plates;
any one of the above-mentioned variable cycle engine mode control mechanisms, it drives to make each valve plate in synchronization:
when the engine is in a closed state, each valve plate is lapped on the shunt ring, so that the variable cycle engine is in a single-duct working mode;
when the variable-cycle engine is in an open state, each valve plate is separated from the diverter ring, and each valve plate is correspondingly accommodated in one accommodating groove, so that the variable-cycle engine is in a double-duct working mode.
According to at least one embodiment of the application, each valve plate is correspondingly located between two adjacent support plates and is in sealing contact with the two support plates in the rotating process.
According to at least one embodiment of the present application, further comprising:
the outlet of the fan outlet casing is butted with the inlet of the intermediate casing outer casing, and an actuating cylinder is fixedly arranged on the fan outlet casing.
According to at least one embodiment of the present application, further comprising:
and the fixed plate is arranged on a linkage ring (8) of the variable-cycle engine mode control mechanism and used for limiting the swing of a piston rod of an actuating cylinder of the variable-cycle engine mode control mechanism.
According to at least one embodiment of the present application, the intermediate outer casing outlet has a first mounting edge;
the outlet of the fan outlet casing is provided with a second mounting edge;
the intermediary cartridge receiver structure further comprises:
and the sealing casing is arranged on the periphery of the outer casing of the intermediate casing, one end of the sealing casing is connected with the first mounting edge, the other end of the sealing casing is connected with the second mounting edge, and a sealing cavity is formed between the sealing casing and the outer casing of the intermediate casing and the fan outlet casing.
According to at least one embodiment of the application, the second mounting edge has a through hole through which the piston rod is arranged;
the intermediary cartridge receiver structure further comprises:
and the stop nut is screwed on the piston rod and is positioned in the sealing cavity, and when each valve plate is in an open state, the stop nut is abutted against the second mounting edge.
Drawings
Fig. 1 is a schematic view illustrating an intermediate casing structure according to an embodiment of the present disclosure, wherein a valve plate is in an open state;
FIG. 2 is a schematic view of an intermediate casing structure according to an embodiment of the present disclosure, with a valve plate in a closed state;
FIG. 3 is a schematic view of FIG. 1 in the axial direction;
FIG. 4 is a top view of FIG. 1;
wherein:
1-an actuator cylinder; 2-a piston rod; 3-a fan outlet casing; 4-intermediary case; 5-sealing the casing;
6-valve plate; 7-valve plate connecting rod; 8-a linkage ring; 9-a mounting seat; 10-a support table; 11-a support plate; 12-a shunt ring; 13-an inner duct; 14-an external duct; 15-sealing the cavity; 16-a locating pin; 17-a stop nut; and 18-fixing piece.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the 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 application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.
The present application is described in further detail below with reference to fig. 1 to 4.
One aspect provides a variable cycle engine mode control mechanism comprising:
a plurality of valve plate connecting rods 7, wherein one end of each valve plate connecting rod 7 is correspondingly hinged to one valve plate 6;
a linkage ring 8, which is sleeved on the outer casing of the intermediate casing 4 and is hinged with the other end of each valve plate connecting rod 7;
the actuating cylinder 1 is characterized in that a piston rod 2 of the actuating cylinder is connected with a linkage ring 8 so as to drive the linkage ring 8 to move along the axial direction, so that each valve plate connecting rod 7 moves, and each valve plate 6 rotates to be in an opening state or a closing state synchronously.
For the variable cycle engine mode control mechanism disclosed in the above embodiment, those skilled in the art can understand that the variable cycle engine mode control mechanism can be arranged on the intermediate casing structure, and by controlling the opening and closing of each valve plate 6 on the intermediate casing 4, the switching between the single-duct working mode and the double-duct working mode of the variable cycle aero-engine can be efficiently and quickly realized.
In some alternative embodiments, each valve plate link 7 includes:
one end of the first connecting rod is correspondingly hinged to one valve plate 6;
one end of the second connecting rod is hinged with the link ring 8, and the other end of the second connecting rod is in threaded fit connection with the other end of the first connecting rod.
For the variable cycle engine mode control mechanism disclosed in the above embodiment, it can be understood by those skilled in the art that each valve plate connecting rod 7 is composed of a first connecting rod and a second connecting rod, and the total length of the first connecting rod and the second connecting rod can be adjusted through relative rotation, that is, the length of each valve plate connecting rod 7 can be adjusted, so as to eliminate the machining error and maintain the synchronism of the valve plates.
In some alternative embodiments, each valve plate connecting rod 7 is provided with a joint bearing at both ends, one end of each valve plate connecting rod is hinged to the coupling ring 8 through the joint bearing, and the other end of each valve plate connecting rod is correspondingly hinged to one valve plate 6 through the joint bearing, so that machining and assembling errors are eliminated by means of the extra degree of freedom provided by the joint bearing, and mechanism clamping stagnation is avoided, as shown in a region C in fig. 4.
In some alternative embodiments, the piston rod 2 of the actuator cylinder 1 is provided with a knuckle bearing, which is connected to the link ring 8 to eliminate machining and assembly errors by virtue of the extra degree of freedom provided by the knuckle bearing, and to avoid jamming of the mechanism, as shown in the area a in fig. 1.
In alternative embodiments, there may be more than one ram 1, wherein an even number of rams 1, greater than 2, may limit the angular and axial deflection of the link ring 6 such that the link ring 6 maintains pure axial movement.
In some optional embodiments, further comprising:
a plurality of mounting seats 9 for being disposed on the outer casing of the intermediate casing 4, each mounting seat 9 having a rotating shaft, each rotating shaft being correspondingly hinged to one valve plate 6, each valve plate 6 being driven by a corresponding valve plate link 7 to rotate around the corresponding rotating shaft, as shown in a region D in fig. 4.
In some optional embodiments, further comprising:
a plurality of supporting platforms 10, for being arranged on the outer casing of the intermediary casing 4 to support the link ring 8, the link ring 8 slides on each supporting platform 10 under the driving of the actuating cylinder 1, wherein a reasonable gap is left between the supporting platform 10 and the link ring 8 to offset the processing and assembling error and prevent the clamping stagnation.
In some alternative embodiments, each support platform 10 may be disposed on a corresponding one of the mounting seats 9.
Another aspect provides an intermediate casing structure, including:
the intermediate casing outer casing, namely the outer casing of the intermediate casing 4, is provided with a plurality of accommodating grooves;
the intermediate casing inner casing, namely the inner casing of the intermediate casing 4, is arranged at the inner side of the intermediate casing outer casing;
one end of each support plate 11 is connected with the inner side of the intermediate casing outer casing, and the other end of each support plate 11 is connected with the intermediate casing inner casing;
a shunt ring 12 disposed between the intermediate casing outer casing and the intermediate casing inner casing;
a plurality of valve plates 6;
any of the above-mentioned variable cycle engine mode control mechanisms, it drives to make each valve plate 6 in synchronization:
in a closed state, each valve plate 6 is lapped on the diverter ring 12, so that the variable cycle engine is in a single-duct working mode;
in the opening state, the valve plates 6 are separated from the flow divider 12, and each valve plate 6 is correspondingly accommodated in one accommodating groove, so that the variable cycle engine is in a double-duct working mode.
For the intermediate casing structure disclosed in the above embodiments, it can be understood by those skilled in the art that the flow channel between the intermediate casing outer casing and the flow dividing ring 12 is an outer duct 14, the flow channel between the intermediate casing inner casing and the flow dividing ring 12 is an inner duct 13, and each valve sheet 6 is driven by the variable cycle engine mode control mechanism to be in:
in a closed state, the outer duct is closed, so that the airflow at the outlet of the low-pressure compressor can flow to the core engine through the inner duct 13 completely, and the variable-cycle aircraft engine works in a single-duct working mode;
when the variable-cycle aircraft engine is in an open state, the outer duct is opened, so that the airflow at the outlet of the low-pressure compressor can flow to the core engine and the tail nozzle in a certain proportion through the inner duct and the outer duct without being blocked, and the variable-cycle aircraft engine works in a double-duct working mode;
the intermediate case structure is based on the conversion between the single-duct working mode and the double-duct working mode of the variable-cycle aero-engine efficiently and quickly realized by any variable-cycle engine mode control mechanism, each valve plate 6 is correspondingly accommodated in one accommodating groove when being in an open state, namely each valve plate 6 can be just correspondingly filled in the accommodating groove on the outer case of the intermediate case when being in the open state, and therefore a good sealing effect can be achieved.
The intermediate casing structure fully considers the problems of working state and environment, structural interfaces of front and rear parts, space limitation, process feasibility and the like of the whole engine, and can realize multi-stage adjustment between a single-duct working mode and a double-duct working mode of the variable-cycle aero-engine for the intermediate state between opening and closing of the valve plate, and has the advantages of small flow loss, compact structure, stability and reliability.
In some alternative embodiments, each valve plate 6 is located between two adjacent support plates 11, and is in sealing contact with the two support plates 11 during rotation.
In some optional embodiments, further comprising:
the outlet of the fan outlet casing 3 is butted with the inlet of the intermediate casing outer casing, and the actuating cylinder 1 is fixedly arranged on the fan outlet casing.
In alternative embodiments, the ram 1 is screwed to the fan outlet casing 3, as shown in the area B in fig. 4.
In some optional embodiments, further comprising:
the fixing piece 18 is arranged on the linkage ring 8 of the variable-cycle engine mode control mechanism and used for adjusting the connecting gap between the piston rod 2 of the actuating cylinder 1 of the variable-cycle engine mode control mechanism and the linkage ring 8 and limiting the radial swing of the piston rod 2 of the actuating cylinder 1 of the variable-cycle engine mode control mechanism, so that eccentric wear and clamping stagnation between the piston rod 2 and the actuating cylinder body of the actuating cylinder can be avoided.
In some alternative embodiments, the intermediate case outer casing outlet has a first mounting edge;
the outlet of the fan outlet casing 3 is provided with a second mounting edge;
the intermediary cartridge receiver structure further comprises:
and the sealing casing 5 is arranged on the periphery of the outer casing of the intermediate casing, one end of the sealing casing is connected with the first mounting edge, the other end of the sealing casing is connected with the second mounting edge, a sealing cavity is formed between the sealing casing and the outer casing of the intermediate casing and the fan outlet casing 3, and when the valve plate 6 is not matched with the accommodating groove on the outer casing of the intermediate casing tightly enough to cause air leakage, the pneumatic loss is reduced.
In some alternative embodiments, the second mounting edge has a through hole through which the piston rod 2 is arranged;
the intermediary cartridge receiver structure further comprises:
and the stop nut 17 is screwed on the piston rod 2 and is positioned in the sealing cavity, and when each valve plate 6 is in an opening state, the stop nut 17 is abutted against the second mounting edge.
For the intermediate casing structure disclosed in the above embodiment, it can be understood by those skilled in the art that when each valve plate 6 is in an open state, the stop nut 17 abuts against the second mounting edge, that is, the stop nut 17 is disposed on the piston rod 2, and when the variable cycle engine mode control mechanism drives each valve plate 6 to rotate so that each valve plate 6 is in the open state, the variable cycle engine mode control mechanism limits each valve plate 6 to rotate one by one, so as to achieve stop positioning of each valve plate; similarly, as can be understood by those skilled in the art, when each valve plate 6 is in the closed state, each valve plate 6 is overlapped on the diverter ring 12, and the diverter ring 12 realizes the stop positioning when each valve plate 6 rotates to be in the closed state.
So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.
Claims (10)
1. A variable cycle engine mode control mechanism comprising:
the valve plate connecting rods (7) are arranged, one end of each valve plate connecting rod (7) is correspondingly hinged to one valve plate (6);
the linkage ring (8) is sleeved on the outer casing of the intermediate casing (4) and is hinged with the other end of each valve plate connecting rod (7);
and a piston rod (2) of the actuating cylinder (1) is connected with the linkage ring (8) so as to drive the linkage ring (8) to move along the axial direction, so that each valve plate connecting rod (7) moves, and each valve plate (6) rotates and is synchronously in an opening state or a closing state.
2. The variable cycle engine mode control mechanism of claim 1,
each of the sheet links (7) includes:
one end of the first connecting rod is correspondingly hinged to a valve plate (6);
one end of the second connecting rod is hinged with the linkage ring (8), and the other end of the second connecting rod is in threaded fit connection with the other end of the first connecting rod.
3. The variable cycle engine mode control mechanism of claim 1,
further comprising:
the valve plate installing device comprises a plurality of installing seats (9) and a plurality of rotating shafts, wherein the installing seats (9) are used for being arranged on an outer casing of an intermediate casing (4), each rotating shaft is arranged on each installing seat (9) and used for corresponding to one valve plate (6) in a hinged mode, and each valve plate (6) can rotate around the corresponding rotating shaft.
4. The variable cycle engine mode control mechanism of claim 3,
further comprising:
a plurality of supports (10) for being arranged on the outer casing of the intermediate casing (4) to support the link ring (8).
5. An intermediate case structure, comprising:
the intermediate casing outer casing is provided with a plurality of accommodating grooves;
an intermediate case inner case disposed inside the intermediate case outer case;
one end of each support plate (11) is connected with the inner side of the intermediate casing outer casing, and the other end of each support plate (11) is connected with the intermediate casing inner casing;
a diverter ring (12) disposed between the intermediate case outer case and the intermediate inner case;
a plurality of valve plates (6);
a variable cycle engine mode control mechanism as claimed in any one of claims 1 to 4, which is actuated to synchronize each of the valve plates (6) in:
when the engine is in a closed state, each valve plate (6) is lapped on the shunt ring (12), so that the variable cycle engine is in a single-duct working mode;
when the variable-cycle engine is in an open state, the valve plates (6) are separated from the flow distribution ring (12), and each valve plate (6) is correspondingly accommodated in one accommodating groove, so that the variable-cycle engine is in a double-duct working mode.
6. The intermediate case structure according to claim 5,
each valve plate (6) is correspondingly positioned between two adjacent support plates (11) and is in sealing contact with the two support plates (11) in the rotating process.
7. The intermediate case structure according to claim 5,
further comprising:
and the outlet of the fan outlet casing (3) is butted with the inlet of the intermediate casing outer casing, and the actuating cylinder (1) is fixedly arranged on the fan outlet casing.
8. The intermediate case structure according to claim 7,
further comprising:
and a fixing piece (18) which is arranged on a linkage ring (8) of the variable-cycle engine mode control mechanism and is used for limiting the swing of a piston rod (2) of an actuating cylinder (1) of the variable-cycle engine mode control mechanism.
9. The intermediate case structure according to claim 7,
the outlet of the outer casing of the intermediate casing is provided with a first mounting edge;
the outlet of the fan outlet casing (3) is provided with a second mounting edge;
the intermediate case structure further comprises:
and the sealing casing (5) is arranged on the periphery of the intermediate casing outer casing, one end of the sealing casing is connected with the first mounting edge, the other end of the sealing casing is connected with the second mounting edge, and a sealing cavity is formed between the sealing casing and the intermediate casing outer casing and the fan outlet casing (3).
10. The intermediate case structure of claim 9, wherein,
the second mounting edge is provided with a through hole, and the piston rod (2) penetrates through the through hole;
the intermediate case structure further comprises:
and the stop nut (17) is screwed on the piston rod (2) and is positioned in the sealing cavity, and when the valve plates (6) are in an opening state, the stop nut (17) is abutted to the second mounting edge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010092709.4A CN111207005A (en) | 2020-02-14 | 2020-02-14 | Variable cycle engine mode control mechanism and intermediate casing structure with same |
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| CN202010092709.4A CN111207005A (en) | 2020-02-14 | 2020-02-14 | Variable cycle engine mode control mechanism and intermediate casing structure with same |
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| CN111636978A (en) * | 2020-06-16 | 2020-09-08 | 南京航空航天大学 | A flow regulating mechanism suitable for turbine-based cycle combined engine |
| CN112648026A (en) * | 2020-12-16 | 2021-04-13 | 中国航发沈阳发动机研究所 | Intermediary cartridge receiver structure |
| CN114017388A (en) * | 2021-11-19 | 2022-02-08 | 中国航发沈阳发动机研究所 | Device for improving working Mach number of aviation turbine engine |
| CN115217985A (en) * | 2022-05-12 | 2022-10-21 | 中国航发四川燃气涡轮研究院 | Sealing structure for mode selection valve assembly |
| CN115977827A (en) * | 2023-02-14 | 2023-04-18 | 北京航空航天大学 | Split structure transmission type rear duct ejector for variable cycle engine |
| CN116305365A (en) * | 2023-04-07 | 2023-06-23 | 中国航发沈阳发动机研究所 | Modularized design method of variable-circulation core machine compressor test piece under semi-restraint |
| CN116399599A (en) * | 2023-04-14 | 2023-07-07 | 中国航发沈阳发动机研究所 | A ground verification test device for a variable cycle aeroengine mode selection mechanism |
| CN116659880A (en) * | 2023-05-19 | 2023-08-29 | 中国航发贵阳发动机设计研究所 | A fan-shaped test device for a mixer with adjustable internal and external area ratio |
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Application publication date: 20200529 |