CN115614179B - Throat area adjusting mechanism - Google Patents
Throat area adjusting mechanism Download PDFInfo
- Publication number
- CN115614179B CN115614179B CN202211055936.5A CN202211055936A CN115614179B CN 115614179 B CN115614179 B CN 115614179B CN 202211055936 A CN202211055936 A CN 202211055936A CN 115614179 B CN115614179 B CN 115614179B
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- China
- Prior art keywords
- rod
- throat area
- connecting rod
- regulating plate
- piston rod
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- 239000007921 spray Substances 0.000 claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 102100040255 Tubulin-specific chaperone C Human genes 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 108010093459 tubulin-specific chaperone C Proteins 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
- F02K7/10—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof characterised by having ram-action compression, i.e. aero-thermo-dynamic-ducts or ram-jet engines
- F02K7/16—Composite ram-jet/turbo-jet engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/06—Varying effective area of jet pipe or nozzle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/06—Varying effective area of jet pipe or nozzle
- F02K1/15—Control or regulation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention discloses a throat area adjusting mechanism, belongs to the field of dual-channel engine exhaust system movement mechanism design, and solves the technical problem of low throat area adjusting efficiency of a structure in the prior art. Including fixed mounting seat, L type structure setting's regulating plate, actuator cylinder, install upper and lower gyro wheel, the fixed bolster on the receiver, the slide rail, actuating lever, follow-up pull rod the actuator cylinder moves the time, the piston rod drives the one end of actuating lever is in along the horizontal direction removal in the slide rail, through the other end of actuating lever transmits vector force to first connecting rod, drives the front end of regulating plate slides between gyro wheel and last gyro wheel down, through changing the regulating plate position in order to adjust the throat area, and, the drive follow-up pull rod drives the tail end of regulating plate is adjusted the area of position of giving vent to anger in proportion to improve the performance of spray tube, improve the availability factor of air compressor.
Description
Technical Field
The invention belongs to the field of motion mechanism design of a dual-channel engine exhaust system, and particularly relates to a throat area adjusting mechanism.
Background
The dual channel engine is capable of meeting the requirements of an aircraft operating over a wide speed range. For the combined spray pipe of the dual-channel engine, the control and the change of various working modes of the engine must be satisfied, and the throat area of the combined spray pipe is required to be stepless and adjustable so as to be matched with the state of a host; meanwhile, a relatively high thrust coefficient is required in the full envelope range, so that the thrust requirement of the engine is met, the outlet area of the spray pipe is required to be adjustable, and the outlet area of the spray pipe is close to the outlet area required in the process of complete expansion.
At present, besides meeting the engine regulation requirement, the design of the combined spray pipe regulating mechanism also needs to consider the stress load and working environment conditions, and the unreasonable arrangement of the moving mechanism brings adverse conditions of small design space, large load, high environment temperature and the like. For example, the adjusting structure a is arranged in the middle of the double cases, the middle temperature of the double cases is high, the available space is small, and the adjusting efficiency of the adjusting structure a is reduced along with the temperature rise.
Disclosure of Invention
In view of this, the invention provides a throat area adjusting mechanism, which at least partially solves the technical problem of low throat area adjusting efficiency of the structure in the prior art.
The utility model provides an adjustment mechanism of throat area is applicable to the regulation of one side throat area of binary channels spray tube, and installs on the spray tube receiver, including fixed mounting seat, L type structure setting's regulating plate, actuator cylinder, install upper and lower gyro wheel, fixed bolster on the receiver, the slide rail, the actuating lever, follow-up pull rod, the actuator cylinder includes piston rod and barrel, the slide rail is fixed on the receiver, the interval is fixed with first connecting rod and second connecting rod on the regulating plate, just the second connecting rod is installed adjacent tail end's position on the regulating plate sets gradually fixed mounting seat, lower gyro wheel, upper gyro wheel, fixed slide rail, fixed bolster along the air current direction, wherein:
the cylinder body is arranged on the fixed mounting seat, one end of the piston rod is connected with the cylinder body, the other end of the piston rod stretches into the sliding rail to reciprocate, the piston rod is connected with one end of the driving rod in the sliding rail, the other end of the driving rod is hinged with the first connecting rod,
the fixed support is fixedly arranged on the casing, and two ends of the follow-up pull rod are respectively hinged with the fixed support and the second connecting rod;
the lower roller and the upper roller are arranged on the casing, and the front end of the adjusting plate can slide relative to the lower roller and the upper roller;
when the actuating cylinder acts, the piston rod drives one end of the driving rod to move in the sliding rail along the horizontal direction, vector force is transmitted to the first connecting rod through the other end of the driving rod, the front end of the adjusting plate is driven to slide between the lower roller and the upper roller, the throat area is adjusted by changing the position of the adjusting plate 7, and the follow-up pull rod is driven to drive the tail end of the adjusting plate to adjust the area of the air outlet position in proportion, so that the performance of the spray pipe is improved.
The invention has the technical advantages that:
1. the invention provides a swing type movement mechanism scheme of a sliding rail rocker arm and a follow-up pull rod to drive an adjusting plate to move, so that the purpose of stepless throat area (the position state of an exhaust throat reaches a design value from 0) adjustment is realized, and the requirements of different states of an engine are met;
2. the movement mechanism provided by the invention realizes that the outlet area of the spray pipe is adjustable along with the throat area, and by adjusting the length and the fixed installation position of the follow-up pull rod, the thrust performance of the spray pipe is improved in a state of achieving a better area ratio under different working conditions, and compared with the traditional mode, the mode of arranging the middle adjusting plate only controls the throat of the spray pipe, the outlet area cannot be controlled, and the performance of the spray pipe is greatly reduced.
3. According to the moving mechanism provided by the invention, the moving hinge point is arranged in the cavity between the upper part of the combined spray pipe and the engine compartment of the aircraft, so that a large design space is provided, force transmission and component load can be reasonably designed, the moving mechanism is arranged at a position close to the engine compartment, the environmental temperature is relatively low, and the moving reliability is greatly improved.
4. The motion mechanism provided by the invention can realize that the displacement of the actuating cylinder and the throat area of the spray pipe are regulated according to a specified rule through reasonable design, and the linear rule regulation is adopted in the description, so that the control rule of a control system is matched conveniently, and the control precision of the throat area of the spray pipe is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed 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 disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a prior art arrangement of variable geometry;
FIG. 2 is a schematic diagram of an adjusting mechanism for adjusting throat area by the upper plate.
Fig. 3 is a schematic view of the upper adjusting plate in two different positions.
FIG. 4 is a graph of actuator displacement versus nozzle throat area;
wherein:
1. fixing the mounting base; 2. an actuator cylinder; 3. a slide rail; 4. a fixed support; 5. a follow-up pull rod; 6. a large pull rod; 7. an adjusting plate; 8. a lower roller; 9. an upper roller; 10. a first link; 11. a second link; 12. a driving rod; 13. a lower channel; 14. an upper channel; 15. a piston rod.
Detailed Description
Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present disclosure will become readily apparent to those skilled in the art from the following disclosure, which describes embodiments of the present disclosure by way of specific examples. It will be apparent that the described embodiments are merely some, but not all embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
According to the regulating mechanism provided by the invention, the problem of mutual matching of the states of the combined spray pipe and the host machine is realized through the set of mechanism, meanwhile, the outlet area of the spray pipe of the set of mechanism is changed along with the area of the throat, so that the efficiency of the spray pipe in different drop pressure ratios can be improved, and the requirement of an engine on the performance of the spray pipe is met; meanwhile, the set of mechanism is designed in the upper part of the combined spray pipe and the cavity of the aircraft engine compartment, so that a large design space is provided, and force transmission and component load can be reasonably designed; in addition, one side in the design space is close to the engine room with low temperature, and the working environment temperature is low
The throat area adjusting mechanism shown in fig. 2 is suitable for adjusting the throat area on one side of a dual-channel spray pipe, and is installed on a spray pipe casing, TBCC is a combined use of a ramjet engine and a turbine engine, and comprises a fixed installation seat 1, an adjusting plate 7 arranged in an L-shaped structure, a hydraulic actuating cylinder 2, an upper roller 9, a lower roller 8, a fixed support 4, a sliding rail 3, a driving rod 12 and a follow-up pull rod 5 which are installed on the casing in an opposite mode, wherein the actuating cylinder 2 comprises a piston rod 15 and a cylinder body, the sliding rail is fixed on the casing, a first connecting rod 10 and a second connecting rod 11 are fixed on the adjusting plate 7 at intervals, the second connecting rod 11 is installed at a position adjacent to the tail end on the adjusting plate 7, and a fixed installation seat 1, a lower roller 8, an upper roller 9, a fixed sliding rail 3 and a fixed support 4 are sequentially and adjacently arranged along the air flow direction, wherein:
the cylinder body is arranged on the fixed mounting seat 1, one end of the piston rod 15 is connected with the cylinder body, the other end extends into the sliding rail 3 to reciprocate, and is connected with one end of the driving rod 12 in the sliding rail 3, the other end of the driving rod 12 is hinged with the first connecting rod 10,
the fixed support 4 is fixedly arranged on the casing, and two ends of the follow-up pull rod 5 are respectively hinged with the fixed support 4 and the second connecting rod 11;
the lower roller 8 and the upper roller 9 are arranged on the casing, and the front end of the adjusting plate 7 can slide relative to the lower roller 8 and the upper roller 9;
when the actuator cylinder acts, one end of the piston rod 15 drives one end of the driving rod 12 to move in the sliding rail 3 along the horizontal direction, the arrangement of the piston rod is taken as a reference, vector force is transmitted to the first connecting rod 10 through the other end of the driving rod 12, the front end of the adjusting plate 7 is driven to slide between the lower roller 8 and the upper roller 9, the throat area is adjusted by changing the position of the adjusting plate 7, and the tail end of the adjusting plate 7 is driven by the driving follower pull rod 5 to adjust the area of the air outlet position proportionally, so that the performance of the spray pipe is improved. It should be noted that the binary channels include upper and lower regulating plates, and the regulating plate in this case is the upper regulating plate promptly, and lower regulating plate is fixed can. As shown in fig. 3, comprising a lower channel 13 and an upper channel 14, the throat area of the upper channel 14 is intended to be adjusted proportionally by the adjusting plate 7, the adjusting plate 7 being adapted to the throat area proportionally when in different positions.
The scheme for adjusting the area of the air outlet position according to the proportion is that the length of the driving rod 12 is larger than that of the follow-up pull rod 5, the length of the first connecting rod 10 is larger than that of the second connecting rod 11, and the linear relation between the displacement of the driving piston rod of the actuator cylinder and the area of the throat of the spray pipe is satisfied. The specific length is adjusted according to the size of the engine,
as a specific embodiment provided by the scheme, the length of the sliding groove in the sliding rail is a preset length, and the front end position of the adjusting plate 7 is not separated from the lower roller 8 and the upper roller 9, and/or the front end of the adjusting plate 7 is provided with a limiting piece for ensuring that the adjusting plate is not separated from the lower roller 8 and the upper roller 9.
The above is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the disclosure are intended to be covered in the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides an adjustment mechanism of throat area, is applicable to the regulation of one side throat area of binary channels spray tube, and installs on the spray tube receiver, its characterized in that, including fixed mounting seat, L type structure setting's regulating plate, actuator cylinder, install upper and lower gyro wheel, fixed bolster on the receiver, the slide rail, the actuating lever, follow-up pull rod, the actuator cylinder includes piston rod and barrel, the slide rail is fixed on the receiver, the interval is fixed with first connecting rod and second connecting rod on the regulating plate, just the second connecting rod is installed adjacent tail end's position on the regulating plate sets gradually fixed mounting seat, lower gyro wheel, upper gyro wheel, slide rail, fixed bolster along the air current direction, wherein:
the cylinder body is arranged on the fixed mounting seat, one end of the piston rod is connected with the cylinder body, the other end of the piston rod stretches into the sliding rail to reciprocate, the piston rod is connected with one end of the driving rod in the sliding rail, the other end of the driving rod is hinged with the first connecting rod,
the fixed support is fixedly arranged on the casing, and two ends of the follow-up pull rod are respectively hinged with the fixed support and the second connecting rod;
the lower roller and the upper roller are arranged on the casing, and the front end of the adjusting plate can slide relative to the lower roller and the upper roller;
when the actuating cylinder works, the piston rod drives one end of the driving rod to move in the sliding rail along the horizontal direction, vector force is transmitted to the first connecting rod through the other end of the driving rod, the front end of the adjusting plate is driven to slide between the lower roller and the upper roller, the throat area is adjusted by changing the position of the adjusting plate, and the follow-up pull rod is driven to drive the tail end of the adjusting plate to adjust the area of the air outlet position in proportion, so that the performance of the spray pipe is improved.
2. The adjustment mechanism of claim 1, wherein a length of the drive rod is greater than a length of the follower rod.
3. The adjustment mechanism of claim 2, wherein a length of the first link is greater than a length of the second link.
4. The adjustment mechanism of claim 1 wherein the displacement of the actuator cylinder drive piston rod is linear with the nozzle throat area.
5. The adjustment mechanism of claim 1, wherein the length of the runner in the slide rail is a predetermined length, and wherein the front end position of the adjustment plate is such that the runner does not fall off the lower roller and the upper roller.
6. The adjustment mechanism of claim 1, wherein the front end of the adjustment plate is provided with a stop to ensure that it does not fall off the lower and upper rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211055936.5A CN115614179B (en) | 2022-08-31 | 2022-08-31 | Throat area adjusting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211055936.5A CN115614179B (en) | 2022-08-31 | 2022-08-31 | Throat area adjusting mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115614179A CN115614179A (en) | 2023-01-17 |
| CN115614179B true CN115614179B (en) | 2024-04-05 |
Family
ID=84857526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211055936.5A Active CN115614179B (en) | 2022-08-31 | 2022-08-31 | Throat area adjusting mechanism |
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| Country | Link |
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| CN (1) | CN115614179B (en) |
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|---|---|---|---|---|
| DE2254719A1 (en) * | 1971-12-20 | 1973-06-28 | United Aircraft Corp | CONVERGENT / DIVERGENT NOZZLE FOR ONE JET |
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| CN115614179A (en) | 2023-01-17 |
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