CN111058946A - Compressor bypass air entraining device and system - Google Patents
Compressor bypass air entraining device and system Download PDFInfo
- Publication number
- CN111058946A CN111058946A CN201911236276.9A CN201911236276A CN111058946A CN 111058946 A CN111058946 A CN 111058946A CN 201911236276 A CN201911236276 A CN 201911236276A CN 111058946 A CN111058946 A CN 111058946A
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- rod
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- push rod
- push
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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
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
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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
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/32—Inducing air flow by fluid jet, e.g. ejector action
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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
-
- 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 invention belongs to the design technology of a bypass air-entraining system of an aircraft engine compressor, and particularly relates to a bypass air-entraining device and a bypass air-entraining system of the compressor, which comprise an actuating cylinder 1, a push rod 2, a connecting rod 3 and an air-entraining cover plate 4, wherein the air-entraining cover plate 4 is opened and closed to control the flow of an air-entraining channel; the novel bypass air entraining device of the air compressor can meet the requirements of different air entraining amounts of the engine in different working states by controlling the air entraining flow, so that the low rotating speed performance of the air compressor is improved; meanwhile, the led-out gas can be led into the afterburner to generate thrust, the temperature of the airflow of the bypass air-entraining pipe is lower than that of the main stream fuel gas, and the led-out gas can also be used for cooling the afterburner to prolong the service life of the afterburner.
Description
Technical Field
The invention belongs to the design technology of a bypass bleed air system of an aircraft engine compressor. Mainly relates to a bypass air-entraining device and a bypass air-entraining system of a compressor.
Background
Along with the increase of the flight Mach number, the stagnation temperature at the inlet of the engine is continuously increased, and the converted rotating speed of the gas compressor is reduced. The reduction of the compressor converted rotational speed brings about a reduction in the engine converted flow, resulting in a reduction in the engine thrust. Meanwhile, the reduction of the converted rotating speed of the compressor can also cause the reduction of the stable working margin of the compressor. In order to solve the problem, the high-speed turbine engine puts requirements on the compressor for high-flow interstage bleed air under the condition of high Mach number. In order to meet the requirements of different flight Mach numbers on the air entraining system, a bypass air entraining device needs to be designed.
Aiming at the research of an interstage bleed air device of a compressor, bleed air structures are widely applied to compressor parts of a conventional aircraft engine at present, but most of the bleed air structures are used for leading out gas required for cooling and sealing, bleed air pipes are generally adopted for communication, bleed air is achieved through pressure balance, the bleed air quantity is small generally, and the bleed air quantity cannot be adjusted. And the partial bleed mechanism with valves can only control the opening and closing of bleed air and can not adjust the bleed air quantity. Early aircraft engines were generally designed with an interstage bleed band of the compressor, which was turned on at low speed of the compressor to ensure stable starting of the aircraft engine. The air-bleeding belt has large air-bleeding amount and has a switching function, but the gas led out by the air-bleeding belt cannot be recycled, so that the turbine power of the engine is greatly wasted, and the air-bleeding belt has not been applied to modern advanced aero-engines along with the development of the technology.
Disclosure of Invention
The purpose of the invention is as follows: the bypass bleed structure of the aircraft engine can control the bleed flow.
The technical scheme of the invention is as follows:
a bypass air entraining device of a gas compressor comprises an actuating cylinder 1, a push rod 2, a connecting rod 3 and an air entraining cover plate 4, wherein the air entraining cover plate 4 is opened and closed to control the flow of an air entraining channel, a piston rod of the actuating cylinder 1 is connected with the front end of the push rod 2, the rear end of a pull rod 3 is hinged with the movable end of the air entraining cover plate 4, the other end of the air entraining cover plate 4 is fixed on a gas compressor casing, the rear end of the push rod 2 is connected with the front end of the pull rod 3 in a circumferential rotatable mode, and the pull rod 3 can rotate around the connecting part of the rear end of the push rod 2 and the front end of the pull.
Preferably, in the bypass bleed air device of the compressor, a piston rod of the actuating cylinder 1 extends out to push the push rod 2 to move along the horizontal direction, and the pull rod 3 rotates around a connecting part of the rear end of the push rod 2 and the front end of the pull rod 3 under the influence of the movement of the push rod 2 to pull the bleed air cover plate 4 to move towards the closing direction;
the piston rod of the actuating cylinder 1 retracts to push the push rod 2 to move along the horizontal direction, and the pull rod 3 rotates around the connecting part of the rear end of the push rod 2 and the front end of the pull rod 3 under the influence of the movement of the push rod 2 to push the bleed cover plate 4 to move towards the opening direction.
Preferably, in the compressor bypass air entraining device, a piston rod of the actuating cylinder 1 extends out to push the push rod 2 to move along the horizontal direction, and the pull rod 3 is influenced by the movement of the push rod 2 to rotate around a connecting part of the rear end of the push rod 2 and the front end of the pull rod 3 to push the air entraining cover plate 4 to move towards the opening direction;
the piston rod of the actuating cylinder 1 retracts to push the push rod 2 to move along the horizontal direction, and the pull rod 3 rotates around the connecting part of the rear end of the push rod 2 and the front end of the pull rod 3 under the influence of the movement of the push rod 2 to pull the bleed cover plate 4 to move towards the closing direction.
Preferably, the compressor bypass air entraining device further comprises a slide rod 5, the connecting part of the rear end of the winding push rod 2 and the front end of the pull rod 3 is positioned on the slide rod 5, the push rod 2 and the slide rod 5 are positioned at the same horizontal position, and when the push rod 2 moves horizontally, the connecting part of the rear end of the push rod 2 and the front end of the pull rod 3 moves along the slide rod 5.
Preferably, in the compressor bypass air entraining device, the sliding rod 5 is movable in the horizontal direction, the rear end of the push rod 2 is connected with the front end of the pull rod 3 through the sliding rod 5, the rear end of the push rod 2 is connected with one end of the sliding rod 5, and the pull rod 3 is hinged on the sliding rod 5.
Preferably, the compressor bypass air entraining device further comprises a sliding block 6, the rear end of the push rod 2 is connected with the front end of the pull rod 3 through the sliding block 6, the rear end of the push rod 2 is connected to one end of the sliding block 6, the pull rod 3 is hinged to the sliding block 6, and the sliding block 6 can reciprocate along the sliding rod 5.
Preferably, the compressor bypass bleed air device further comprises a linkage ring 7, and a piston rod of the actuating cylinder 1 is connected with the front ends of the push rods 2 through the linkage ring 7 to control the movement of the bleed air cover plates 4.
Preferably, in the compressor bypass bleed air device, the actuating cylinders 1 are connected with the front ends of the push rods 2 through the linkage ring 7 to control the movement of the bleed air cover plates 4.
The invention also provides a bypass bleed air system employing a compressor bypass bleed air arrangement as hereinbefore described, the bleed air passage inlet being located at the compressor interstage location and the outlet being located at the afterburner inlet.
The invention has the beneficial effects that:
the bypass air entraining device is driven by hydraulic pressure and is realized by a mechanical transmission mode; the driving mechanism can be arranged outside the engine or outside the engine, so that the influence of the high-temperature and high-pressure environment in the engine on the device is reduced to the maximum extent, and the reliability is higher; according to the requirements, the air-entraining device is opened/closed, and the functions of air entraining/non air entraining of the engine or air entraining adjustment are realized; the device has simple structure and light weight, and can reduce the influence on the outline of the engine as far as possible by optimizing the placement position of the air entraining device and the structure size of the air entraining pipe.
Drawings
Figure 1 is a schematic diagram of a bypass bleed air apparatus switch mechanism;
figure 2a is a block diagram of the bypass bleed air apparatus switch mechanism in the closed condition;
figure 2b is a structural view of the bypass bleed air apparatus switch mechanism in an open state;
figure 3 is a schematic diagram of the switch mechanism of the bypass bleed air arrangement with the rams arranged in the other direction;
figure 4 is a block diagram of the switch mechanism of the bypass bleed air apparatus with the slide bar;
FIG. 5a is a schematic diagram of a single group structure of a bypass air-entraining device with a linkage ring;
figure 5b is a schematic view of a linkage arrangement for a bypass bleed air device with a linkage ring;
FIG. 6 is a schematic diagram of the application of the bypass bleed air arrangement to the turbine engine;
wherein: the device comprises an actuator cylinder 1, a push rod 2, a pull rod 3, a bleed air cover plate 4, a slide rod 5, a slide block 6 and a linkage ring 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
The bypass bleed air device switch mechanism is composed of an actuating cylinder 1, a push rod 2, a connecting rod 3, a bleed air cover plate 4 and a connecting piece with a special structure. The tail part of the actuating cylinder 1 is hinged and fixed on a casing of the gas compressor, a piston rod of the actuating cylinder is connected with a push rod 2, the push rod 2 is connected with a pull rod 3 through a movable structure, the pull rod 3 can do circumferential motion around a connecting part of the pull rod 4, the pull rod 3 is hinged with the movable end of a gas-guiding cover plate 4, and the other end of the gas-guiding cover plate 4 is hinged and fixed on the casing of the gas compressor, as shown in figure 1.
When the air-bleed regulation is needed, fuel oil (or lubricating oil) drives a piston rod 1 of the actuating cylinder, the reciprocating motion of the piston rod 1 is converted into the rotary motion of the air-bleed cover plate 4 around a hinged point of the air compressor casing through a four-bar mechanism, and the opening and the closing of an air-bleed passage are controlled through the rotation of the air-bleed cover plate, so that the air-bleed flow is regulated.
When air entraining is not needed, a piston rod of the actuating cylinder 1 extends out, and the switch mechanism drives the air entraining cover plate 4 to rotate around the hinged fixed point until the air entraining cover plate 4 completely covers the air entraining channel, and at the moment, the air entraining switch device is in a closed state, as shown in fig. 2 a; when air is required to be introduced, the piston rod 1 of the actuating cylinder retracts, the switch mechanism drives the air introduction cover plate 4 to rotate around the hinged fixed point, and air flow passes through the air introduction flow path, as shown in fig. 2 b.
Meanwhile, the actuating cylinder 1 can be arranged on the other side of the casing of the air compressor according to the condition, so that when a piston rod of the actuating cylinder 1 extends out, the air-entraining cover plate 4 is opened; so that when the ram 1 piston rod is retracted the bleed cover 4 is closed as shown in figure 3.
In order to improve the reliability of the operation of the switch mechanism of the bypass air entraining device, the push rod 2 needs to be ensured to move along a straight line, the additional acting force transmitted by the air entraining cover plate is offset, and the connecting part of the push rod 2 and the pull rod 3 can be ensured to move along the slide rod 5 through the connecting or limiting structure, so that the movement of the mechanism is restrained, and the reliable operation of the switch mechanism of the bypass air entraining device is ensured.
In the case of fig. 5a and 5b, which are examples of applications of a typical bypass bleed air arrangement, the bleed air flow paths can generally be provided as a number of bleed air ducts which are distributed uniformly in the circumferential direction, in which case the bleed air switch arrangement is arranged at the connection of the early bleed air ducts to the casing. In this example, the push rod 2 and the pull rod 3 are connected through a slide block 6 and slide along the slide rod 5 during operation. In order to reduce the cross-sectional area of the engine, the bleed air duct can be designed as a special-shaped pipe. Meanwhile, in order to ensure the consistency of actuation of the bleed switches on different bleed pipelines, a linkage ring can be arranged to be connected with push rods of a plurality of bleed switch devices, a plurality of actuating cylinders are arranged as required, and piston rods of the actuating cylinders are connected with the linkage ring. In this example, the piston rods of the actuating cylinders 1 are hinged to the linkage rings 7, the linkage rings 7 are hinged to the push rods 2, the linkage rings 7 are driven by the groups of actuating cylinders 1 during operation, and the linkage rings drive the push rods 2 of the groups of bleed air switch devices to move, so that the bleed air cover plates are driven to open and close. The number of the bleed air switch devices and the actuating cylinders is comprehensively determined by mainly considering factors such as airflow, the stress of the bleed air cover plate, the driving force of the actuating cylinders and the like, and meanwhile, the size limit of the engine is also one of the design constraints. While the synchronization and consistency of the groups of bleed air switch devices is ensured by the link ring 7.
FIG. 6 illustrates an exemplary use of a bypass bleed air arrangement and flow path for a turbine engine, where appropriate between compressor stages of the engine, typically at the stator vane outlets, by providing a bypass bleed air flow path through which air flow is directed to be directed as desired into an afterburner. In order to utilize the structural space as much as possible, when the bleed air flow path is arranged, the bleed air flow path is divided into a plurality of channels, and a bleed air switch device is arranged on each bleed air channel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The bypass air entraining device of the air compressor is characterized by comprising an actuating cylinder, a push rod, a connecting rod and an air entraining cover plate, wherein the air entraining cover plate is opened and closed to control the flow of an air entraining channel, a piston rod of the actuating cylinder is connected with the front end of the push rod, the rear end of a pull rod is hinged with the movable end of the air entraining cover plate, the other end of the air entraining cover plate is fixed on a casing of the air compressor, the rear end of the push rod is connected with the front end of the pull rod in a circumferential rotatable mode, and the pull rod can rotate around the connecting part of the rear end of the push rod and the front end of.
2. The compressor bypass air entraining device according to claim 1, wherein the piston rod of the actuating cylinder extends out to push the push rod to move along the horizontal direction, and the pull rod rotates around the connecting part of the rear end of the push rod and the front end of the pull rod under the influence of the movement of the push rod to pull the air entraining cover plate to move towards the closing direction;
the piston rod of the actuating cylinder 1 retracts to push the push rod to move along the horizontal direction, and the pull rod rotates around the connecting part of the rear end of the push rod and the front end of the pull rod under the influence of the movement of the push rod to push the air entraining cover plate to move towards the opening direction.
3. The compressor bypass air entraining device according to claim 1, wherein the piston rod of the actuating cylinder extends out to push the push rod to move along the horizontal direction, and the pull rod is influenced by the movement of the push rod to rotate around the connecting part of the rear end of the push rod and the front end of the pull rod to push the air entraining cover plate to move towards the opening direction;
the piston rod of the actuating cylinder retracts to push the push rod to move along the horizontal direction, and the pull rod rotates around the connecting part of the rear end of the push rod and the front end of the pull rod under the influence of the movement of the push rod to pull the air entraining cover plate to move towards the closing direction.
4. The compressor bypass air entraining device according to claim 2 or 3, characterized by further comprising a slide rod, wherein the connecting part around the rear end of the push rod and the front end of the pull rod is positioned on the slide rod, the push rod and the slide rod are positioned at the same horizontal position, and when the push rod moves horizontally, the connecting part between the rear end of the push rod and the front end of the pull rod moves along the slide rod.
5. The compressor bypass air entraining device according to claim 4, characterized in that the slide rod is movable in the horizontal direction, the rear end of the push rod is connected with the front end of the pull rod through the slide rod, the rear end of the push rod is connected with one end of the slide rod, and the pull rod is hinged on the slide rod.
6. The compressor bypass air entraining device according to claim 4 further comprising a sliding block, wherein the rear end of the push rod is connected with the front end of the pull rod through the sliding block, the rear end of the push rod is connected with one end of the sliding block, the pull rod is hinged on the sliding block, and the sliding block can reciprocate along the sliding rod.
7. The compressor bypass bleed air apparatus of claim 4 further comprising a linkage ring, wherein the piston rod of the actuator cylinder is connected to the forward ends of the push rods via the linkage ring to control movement of the bleed cover plates.
8. The compressor bypass bleed air apparatus of claim 7 wherein the plurality of rams are connected to the forward ends of the plurality of pushrods by a linkage ring to control movement of the plurality of bleed cover plates.
9. A bypass bleed air system employing a compressor bypass bleed air arrangement as claimed in any one of claims 1 to 8 wherein the bleed air passage inlet is located at the compressor interstage and the outlet is located at the afterburner inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911236276.9A CN111058946A (en) | 2019-12-05 | 2019-12-05 | Compressor bypass air entraining device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911236276.9A CN111058946A (en) | 2019-12-05 | 2019-12-05 | Compressor bypass air entraining device and system |
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| CN111058946A true CN111058946A (en) | 2020-04-24 |
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| CN201911236276.9A Pending CN111058946A (en) | 2019-12-05 | 2019-12-05 | Compressor bypass air entraining device and system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212014A (en) * | 2020-09-18 | 2021-01-12 | 中国航发沈阳发动机研究所 | Valve design method for adaptively adjusting ventilation mode of aero-engine |
| CN112797027A (en) * | 2021-04-06 | 2021-05-14 | 中国航发上海商用航空发动机制造有限责任公司 | Gas compressor and gas release mechanism thereof |
| CN112855392A (en) * | 2020-12-31 | 2021-05-28 | 厦门大学 | TBCC air inlet channel adjusting mechanism design method based on slider-crank principle |
| CN115614155A (en) * | 2022-08-30 | 2023-01-17 | 中国航发四川燃气涡轮研究院 | Bleed extension board and contain intermediary's quick-witted casket of bleed extension board |
| CN115680903A (en) * | 2022-08-31 | 2023-02-03 | 中国航发四川燃气涡轮研究院 | Recyclable bypass bleed air control method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212014A (en) * | 2020-09-18 | 2021-01-12 | 中国航发沈阳发动机研究所 | Valve design method for adaptively adjusting ventilation mode of aero-engine |
| CN112855392A (en) * | 2020-12-31 | 2021-05-28 | 厦门大学 | TBCC air inlet channel adjusting mechanism design method based on slider-crank principle |
| CN112797027A (en) * | 2021-04-06 | 2021-05-14 | 中国航发上海商用航空发动机制造有限责任公司 | Gas compressor and gas release mechanism thereof |
| CN115614155A (en) * | 2022-08-30 | 2023-01-17 | 中国航发四川燃气涡轮研究院 | Bleed extension board and contain intermediary's quick-witted casket of bleed extension board |
| CN115614155B (en) * | 2022-08-30 | 2024-04-16 | 中国航发四川燃气涡轮研究院 | Air-entraining support plate and intermediate case containing same |
| CN115680903A (en) * | 2022-08-31 | 2023-02-03 | 中国航发四川燃气涡轮研究院 | Recyclable bypass bleed air control method |
| CN115680903B (en) * | 2022-08-31 | 2024-05-03 | 中国航发四川燃气涡轮研究院 | Recoverable bypass bleed air control method |
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Application publication date: 20200424 |