CN115614179A - Adjusting mechanism for throat area - Google Patents
Adjusting mechanism for throat area Download PDFInfo
- Publication number
- CN115614179A CN115614179A CN202211055936.5A CN202211055936A CN115614179A CN 115614179 A CN115614179 A CN 115614179A CN 202211055936 A CN202211055936 A CN 202211055936A CN 115614179 A CN115614179 A CN 115614179A
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- China
- Prior art keywords
- adjusting plate
- rod
- throat area
- slide rail
- adjusting
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- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 239000007921 spray Substances 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000008844 regulatory mechanism Effects 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 102100040255 Tubulin-specific chaperone C Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 108010093459 tubulin-specific chaperone C Proteins 0.000 description 1
Images
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
Abstract
The invention discloses a throat area adjusting mechanism, belongs to the field of the design of a motion mechanism of a two-channel engine exhaust system, and solves the technical problem that the throat area adjusting efficiency is low in the prior art. Adjusting plate, actuator cylinder, the upper and lower gyro wheel, the fixing support of installing on the quick-witted casket that include fixed mounting seat, L type structure setting, slide rail, actuating lever, follow-up pull rod when the actuator cylinder moves, the piston rod drives the one end of actuating lever is in the interior horizontal direction that follows of slide rail removes, through the other end of actuating lever passes vector power to first connecting rod, drives the front end of adjusting plate slides between gyro wheel and the last gyro wheel down, through changing the adjusting plate position with regulation throat area, and, drive the follow-up pull rod drives the tail end of adjusting plate is adjusted the area of the position of giving vent to anger in proportion to improve the performance of spray tube, improve the availability factor of compressor.
Description
Technical Field
The invention belongs to the field of the design of a motion mechanism of a double-channel engine exhaust system, and particularly relates to a throat area adjusting mechanism.
Background
The dual channel engine is capable of meeting the demands of aircraft operating over a wide speed range. For a combined nozzle of a double-channel engine, the control and the change of multiple working modes of the engine must be met, and the throat area of the combined nozzle is required to be infinitely adjustable so as to be matched with the state of a host; meanwhile, a higher thrust coefficient is required within a full envelope range to meet the requirement of engine thrust, so that the outlet area of the spray pipe is required to be adjustable and is close to the outlet area required when the spray pipe is fully expanded.
At present, the design of a combined spray pipe adjusting mechanism not only meets the requirement of engine adjustment, but also needs to consider the conditions of stress transmission and working environment, and the unreasonable arrangement of a moving mechanism brings the unfavorable conditions of small design space, large load, high environmental temperature and the like. For example, the adjusting structure a is arranged in the middle of the double-casing, the middle temperature of the double-casing is high, the available space is small, and the adjusting efficiency of the adjusting structure a is reduced along with the increase of the temperature.
Disclosure of Invention
In view of the above, the present invention provides a throat area adjusting mechanism, which at least partially solves the technical problem of low throat area adjusting efficiency of the prior art.
The utility model provides an adjustment mechanism of road throat area is applicable to the regulation of one side passageway throat area of binary channels spray tube, and installs on the spray tube quick-witted casket, regulating plate, pressurized strut, install upper and lower gyro wheel, the fixing support on the quick-witted casket including fixed mounting seat, the setting of L type structure, slide rail, actuating lever, follow-up pull rod, the pressurized strut includes piston rod and barrel, the slide rail is fixed on the quick-witted casket, the interval is fixed with first connecting rod and second connecting rod on the regulating plate, just the second connecting rod is installed the position of neighbour tail end on the regulating plate is adjacent in proper order along the air current direction and is set up fixed mounting seat, lower gyro wheel, last gyro wheel, fixed slide rail, fixing support, 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 extends into the slide rail to reciprocate and is connected with one end of the driving rod in the slide 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 mounted 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, a 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 beneficial effects that:
1. the invention provides a swing type movement mechanism scheme of a sliding rail rocker arm and a follow-up pull rod for driving an adjusting plate to move, so that the purpose that the throat area is stepless (the position state of an exhaust throat is from 0 to a design value) is adjustable is realized, and the requirements of an engine in different states 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 the thrust performance of the spray pipe is improved by adjusting the length and the fixed mounting position of the follow-up pull rod in a state of achieving a better area ratio under different working conditions.
3. According to the movement mechanism provided by the invention, the movement hinge point is arranged in the cavity between the upper part of the combined spray pipe and the aircraft engine cabin, so that a large design space is provided, force transmission and component load can be reasonably designed, the movement mechanism is arranged close to the aircraft cabin, the environmental temperature is relatively low, and the movement reliability is greatly improved.
4. The motion mechanism provided by the invention can realize that the displacement of the actuating cylinder and the area of the throat of the spray pipe are adjusted according to a specified rule through reasonable design, and the linear rule is adopted for adjustment in the description, so that the control rule of a control system is conveniently matched, and the control precision of the area of the throat 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 needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic illustration of a prior art arrangement of variable geometry;
FIG. 2 is a schematic view of an adjusting mechanism for adjusting the throat area of the upper plate.
FIG. 3 is a schematic view of the upper adjustment plate in two different positions.
FIG. 4 is a graph of actuator displacement versus nozzle throat area;
wherein:
1. fixing the mounting seat; 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 drive rod; 13. a lower channel; 14. an upper channel; 15. a piston rod.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be carried into practice or applied to various other specific embodiments, and various modifications and changes may be made in the details within the description and the drawings without departing from the spirit of the disclosure. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended 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 disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects 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. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
According to the adjusting mechanism provided by the invention, the problem that the states of the combined spray pipe and the host machine are matched with each other is realized through the set of mechanism, and 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 at different pressure drop ratios can be improved, and the requirement of an engine on the performance of the spray pipe is met; meanwhile, the mechanism is designed in the upper part of the combined spray pipe and the cavity of the aircraft engine cabin, 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 low-temperature engine compartment, and the working environment temperature is lower
As shown in fig. 2 adjustment mechanism of way throat area, be applicable to the regulation of one side passageway throat area of binary channels spray tube, and install on the spray tube quick-witted casket, TBCC is ramjet and turbine engine's combination use, it includes fixed mounting seat 1, regulating plate 7 that L type structure set up, hydraulic form's pressurized strut 2, relative mode installs last gyro wheel 9 on the quick-witted casket, bottom roller 8, fixing support 4, slide rail 3, actuating lever 12 and follow-up pull rod 5, pressurized strut 2 includes piston rod 15 and barrel, the slide rail is fixed on the quick-witted casket, the interval is fixed with first connecting rod 10 and second connecting rod 11 on regulating plate 7, and the position of second connecting rod 11 installation neighbour tail end on regulating plate 7, adjacent fixed mounting seat 1 sets gradually along the air current direction, bottom roller 8, go up gyro wheel 9, fixed slide rail 3, fixing support 4, wherein:
the cylinder body is arranged on the fixed mounting seat 1, one end of a piston rod 15 is connected with the cylinder body, the other end of the piston rod extends into the slide rail 3 to reciprocate and is connected with one end of a driving rod 12 in the slide rail 3, the other end of the driving rod 12 is hinged with a 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, the piston rod 15 drives one end of the driving rod 12 to move in the horizontal direction in the slide rail 3 by taking the placement of a figure 1 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 follow-up pull rod 5 is driven to drive the tail end of the adjusting plate 7 to adjust the area of the air outlet position in proportion, so that the performance of the spray pipe is improved. The two channels comprise an upper adjusting plate and a lower adjusting plate, the adjusting plate in the scheme is the upper adjusting plate, and the lower adjusting plate is fixed. As shown in fig. 3, the throat area adjusting device comprises a lower channel 13 and an upper channel 14, and aims to adjust the throat area of the upper channel 14 in proportion through an adjusting plate 7, and the throat area is adjusted in proportion when the adjusting plate 7 is at different positions.
The scheme for adjusting the area of the air outlet position in proportion is that the length of the driving rod 12 is larger than that of the follow-up pull rod 5, and the length of the first connecting rod 10 is larger than that of the second connecting rod 11, so that 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 met. The specific length is adjusted according to the size of the engine,
as a specific embodiment provided by the present disclosure, the length of the sliding groove in the sliding rail is a preset length, and the front end position of the adjusting plate 7 does not fall off the lower roller 8 and the upper roller 9, and/or a limiting member is disposed at the front end of the adjusting plate 7 to ensure that the adjusting plate does not fall off the lower roller 8 and the upper roller 9.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present 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 a regulation mechanism of road throat area, is applicable to the regulation of one side passageway throat area of binary channels spray tube, and installs on the spray tube machine casket, its characterized in that, including regulating plate, the pressurized strut that fixed mounting seat, L type structure set up, install upper and lower gyro wheel, fixing support on the machine casket, a slide rail, the actuating lever, the follow-up pull rod, the pressurized strut includes piston rod and barrel, the slide rail is fixed on the machine casket, the interval is fixed with first connecting rod and second connecting rod on the regulating plate, just the second connecting rod is installed the position of neighbour tail end on the regulating plate is adjacent in proper order along the air current direction and is set up fixed mounting seat, lower gyro wheel, last gyro wheel, fixed slide rail, fixing support, 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 extends into the slide rail to reciprocate and is connected with one end of the driving rod in the slide 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 mounted 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 to drive the front end of the adjusting plate 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 as to improve the performance of the spray pipe.
2. The adjustment mechanism of claim 1, wherein a length of the drive rod is greater than a length of the follower link.
3. The adjustment mechanism of claim 2, wherein the length of the first link is greater than the length of the second link.
4. An adjustment mechanism according to claim 1, wherein the displacement of the ram drive piston rod is linear with the nozzle throat area.
5. The adjusting mechanism according to claim 1, wherein the length of the sliding groove in the sliding rail is a preset length, and the front end position of the adjusting plate does not fall off from the lower roller and the upper roller.
6. The adjusting mechanism according to claim 1, wherein a limiting member is disposed at a front end of the adjusting plate to prevent the adjusting plate from falling off the lower roller and the upper roller.
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 true CN115614179A (en) | 2023-01-17 |
| CN115614179B CN115614179B (en) | 2024-04-05 |
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| 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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| CN (1) | CN115614179B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2254719A1 (en) * | 1971-12-20 | 1973-06-28 | United Aircraft Corp | CONVERGENT / DIVERGENT NOZZLE FOR ONE JET |
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2022
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| CN115614179B (en) | 2024-04-05 |
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