CN113530705A - Retractable limiting device for outer adjusting piece of adjustable jet pipe of aircraft engine - Google Patents
Retractable limiting device for outer adjusting piece of adjustable jet pipe of aircraft engine Download PDFInfo
- Publication number
- CN113530705A CN113530705A CN202110950529.XA CN202110950529A CN113530705A CN 113530705 A CN113530705 A CN 113530705A CN 202110950529 A CN202110950529 A CN 202110950529A CN 113530705 A CN113530705 A CN 113530705A
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- China
- Prior art keywords
- adjusting sheet
- support
- bracket
- outer lower
- outer upper
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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
- 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
- F02K1/11—Varying effective area of jet pipe or nozzle by means of pivoted eyelids
Abstract
The invention discloses a retraction limiting device for an external adjusting piece of an adjustable jet pipe of an aircraft engine, which comprises: a plurality of outer upper adjusting sheets fixed on the support ring at intervals in the circumference; an outer lower adjusting sheet is covered between every two adjacent outer upper adjusting sheets, the front end of each outer lower adjusting sheet is fixed on the support ring, and the outer lower adjusting sheet covers the gap between the two adjacent outer upper adjusting sheets; the lower part of the gap between two adjacent outer lower adjusting sheets is the partial surface of the outer upper adjusting sheet; the adjustable spray pipe is characterized by further comprising a limiting assembly for expanding the outer upper adjusting sheet and the outer lower adjusting sheet in a radial maximum diameter state, and the limiting assembly can ensure that the outer lower adjusting sheet cannot be separated from a ready limiting gap between the outer upper adjusting sheet and the outer lower adjusting sheet in the process of expanding the adjustable spray pipe from a minimum diameter state to a maximum diameter state. The outer lower adjusting sheet and the outer upper adjusting sheet form a complete enveloping surface all the time, and a reliable maximum diameter nozzle state can be obtained, so that the safety and reliability of the working process of the adjustable spray pipe are ensured.
Description
Technical Field
The invention relates to a retraction limiting device for an external adjusting piece of an adjustable jet pipe of an aircraft engine, and belongs to the technical field of aircraft engines.
Background
The adjustable jet pipe of the aircraft engine is one of main structures of an engine exhaust system, and the adjustable design of different sizes and calibers of an outlet of the tail jet pipe is realized through a control mechanism, so that the thrust adjustment requirement of the engine within a certain range is realized. The outer adjusting sheet of the engine adjustable nozzle is divided into an outer upper adjusting sheet and an outer lower adjusting sheet, and the outer upper adjusting sheet and the outer lower adjusting sheet are retracted and moved along with the change of the working state of the engine. The adjustable nozzle needs to ensure that the outer upper adjusting sheet and the outer lower adjusting sheet form a circular envelope surface in the retraction movement process, the rectification effect on external air flow is realized, the engine can be ensured to obtain the required throat working diameter, and the different thrust adjusting requirements of the engine are met.
At present, the motion tracks of the outer upper adjusting sheet and the outer lower adjusting sheet are not limited, when the envelope surface formed by expanding the outer upper adjusting sheet and the outer lower adjusting sheet from the minimum diameter is in the maximum diameter nozzle state due to the air injection pressure sprayed after combustion, the overlapped edge part of the outer upper adjusting sheet and the outer lower adjusting sheet can be separated, the envelope surface is incomplete, the reliable maximum diameter nozzle state cannot be obtained, and the safety performance of the working process of the adjustable spray pipe is unreliable.
Disclosure of Invention
In order to solve the technical problem, the invention provides a retraction limiting device for an outer adjusting plate of an adjustable jet pipe of an aircraft engine.
The invention is realized by the following technical scheme.
The invention provides a retraction limiting device for an external adjusting piece of an adjustable jet pipe of an aircraft engine, which comprises: a plurality of outer upper adjusting sheets which are distributed and fixed on the supporting ring at intervals in the circumference, and the front end of each outer upper adjusting sheet is fixed on the supporting ring;
an outer lower adjusting sheet is covered between every two adjacent outer upper adjusting sheets, the front end of each outer lower adjusting sheet is fixed on the support ring, and the outer lower adjusting sheet covers the gap between the two adjacent outer upper adjusting sheets; the lower part of the gap between two adjacent outer lower adjusting sheets is the partial surface of the outer upper adjusting sheet;
the adjustable spray pipe is characterized by further comprising a limiting assembly for expanding the outer upper adjusting sheet and the outer lower adjusting sheet in a radial maximum diameter state, and the limiting assembly can ensure that the outer lower adjusting sheet cannot be separated from a ready limiting gap between the outer upper adjusting sheet and the outer lower adjusting sheet in the process of expanding the adjustable spray pipe from a minimum diameter state to a maximum diameter state.
The limiting assembly comprises a bracket G and a bracket F; two brackets G with upwarping arc tail hook structures are fixed on opposite side edges of the outlet section of the outer lower adjusting sheet; the axial position of the outer upper adjusting sheet corresponding to the support G is fixed with a support F of which two ends are L-shaped, one end L-shaped of the support F circumferentially spans between two supports G of the outer lower adjusting sheet, and the other end L-shaped of the support F circumferentially spans between two supports G of the adjacent outer lower adjusting sheet, so that the distance between two ends of the support F is the maximum state that the two adjacent outer lower adjusting sheets can radially expand.
When the adjustable nozzle is expanded to the maximum diameter state, the L-shaped structures at the two ends of the support F are matched with the support G to realize limiting, the overlapped edge parts of the outer upper adjusting sheet and the outer lower adjusting sheet are always overlapped without separation, a complete enveloping surface is always formed, and the reliable maximum diameter nozzle state can be obtained, so that the safety and reliability of the working process of the adjustable nozzle are ensured.
The front end of the outer upper adjusting sheet is fixed on the support ring through a screw; the front end of the outer lower adjusting sheet is fixed on the support ring through a screw.
The rear end of the outer upper adjusting sheet is fixed with a bracket C and a bracket E which are distributed at intervals in the axial direction; and the bracket C and the bracket E extend out of the lower part of the gap between the two adjacent outer lower adjusting sheets.
And the bracket C and the bracket E are welded and fixed with the outer upper adjusting sheet.
The support C and the support E are connected with a motion executing mechanism, and the motion executing mechanism can be pulled up and put down through the support C and the support E, so that the outer upper adjusting sheet can be radially folded and unfolded in the radial direction of the support ring.
And the bracket C and the bracket E are both provided with through holes for being connected with the motion executing mechanism through bolts.
The part surface of the outer upper adjusting sheet positioned in the gap between two adjacent outer lower adjusting sheets is fixedly provided with a bracket A, a bracket B and a bracket D which are distributed at intervals along the axial direction, and the bottom surfaces of the two sides of the bracket A, the bracket B and the bracket D are provided with gaps with the top surface of the outer upper adjusting sheet; the two side edges of the outer lower adjusting sheet along the axial direction are inserted into the gaps between the support A, the support B, the support D and the outer upper adjusting sheet, the side edge of the outer lower adjusting sheet corresponds to the fixed positions of the support A, the support B and the support D, and the side edge of the outer lower adjusting sheet is radially limited when the adjustable spray pipe contracts to the minimum movement position.
The bracket G can be riveted or welded on the outer lower adjusting sheet through rivets; and the bracket F is welded or riveted on the outer upper adjusting sheet.
The invention has the beneficial effects that: the limiting assembly can ensure that the outer lower adjusting sheet does not fall off from a ready limiting gap between the outer upper adjusting sheets in the expanding motion process of the adjustable spray pipe from the minimum diameter state to the maximum diameter state, and the outer lower adjusting sheet and the outer upper adjusting sheet always form a complete enveloping surface to obtain a reliable maximum diameter nozzle state, so that the safe and reliable performance of the adjustable spray pipe in the working process is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a rear portion of FIG. 1;
FIG. 3 is a schematic view of the mounting structure of the outer upper adjustment tab and the bracket F;
FIG. 4 is a schematic view of the mounting structure of the outer lower adjustment tab and the bracket G;
in the figure: 1-a support ring; 2-scaffold a; 3-scaffold B; 4-scaffold C; 5-scaffold D; 6-scaffold E; 7-scaffold F; 8-external lower regulating sheet; 9-outer upper regulating sheet; 10-scaffold G; 11-rivet.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1-4.
The invention relates to a retraction limiting device for an external adjusting piece of an adjustable jet pipe of an aircraft engine, which comprises: a plurality of outer upper adjusting sheets 9 are circumferentially distributed and fixed on the support ring 1 at intervals, and the front end of the left side of each outer upper adjusting sheet 9 is fixed on the support ring 1 through a screw;
the rear ends of the outer upper adjusting pieces 9 are fixedly welded with supports C4 and supports E6 which are distributed at intervals in the axial direction, through holes are formed in the supports C4 and the supports E6 and used for being connected with a movement executing mechanism through bolts, the movement executing mechanism can be pulled up and put down through the supports C4 and the supports E6, and the outer upper adjusting pieces 9 are radially retracted and extended in the radial direction of the support ring 1;
an outer lower adjusting sheet 8 is covered between every two adjacent outer upper adjusting sheets 9, the front end of the left side of each outer lower adjusting sheet 8 is fixed on the support ring 1 through a screw, and the outer lower adjusting sheet 8 covers the gap between the two adjacent outer upper adjusting sheets 9; the lower part of the gap between two adjacent outer lower adjusting sheets 8 is the partial surface of the outer upper adjusting sheet 9 for the extension of a bracket C4 and a bracket E6;
the partial surfaces of the outer upper adjusting sheets 9 positioned in the gap between two adjacent outer lower adjusting sheets 8 are fixedly welded with brackets A2, brackets B3 and brackets D5 which are distributed at intervals along the axial direction, and gaps are reserved between the bottom surfaces of the two sides of the brackets A2, the brackets B3 and the brackets D5 and the top surfaces of the outer upper adjusting sheets 9; the two side edges of the outer lower adjusting piece 8 along the axial direction are inserted into gaps between the bracket A2, the bracket B3, the bracket D5 and the outer upper adjusting piece 9, the side edge of the outer lower adjusting piece 8 corresponds to the welding fixing positions of the bracket A2, the bracket B3 and the bracket D5, and the outer lower adjusting piece 8 can obtain radial limit when the adjustable spray pipe is contracted to the minimum movement position;
in order to realize the expansion movement process of the adjustable nozzle from the minimum diameter state to the maximum diameter state, the outer lower adjusting sheet 8 is not separated from the existing limit clearance between the outer upper adjusting sheet 9 and the bracket A2, the bracket B3 and the bracket D5; two brackets G10 with upwarping arc tail hook structures are fixed on opposite side edges of the outlet section of the outer lower adjusting plate 8, and the bracket G10 can be riveted or welded on the outer lower adjusting plate 8 through rivets 11; a bracket F7 with L-shaped two ends is welded or riveted at the axial position of the outer upper adjusting sheet 9 corresponding to the bracket G10, one end L of the bracket F7 circumferentially spans between two brackets G10 of the outer lower adjusting sheet 8, and the other end L of the bracket F7 circumferentially spans between two brackets G10 of the adjacent outer lower adjusting sheet 8, so that the distance between two ends of the bracket F7 is the maximum state that the two adjacent outer lower adjusting sheets 8 can radially expand.
When the adjustable nozzle is expanded to the maximum diameter state, the L-shaped structures at the two ends of the support F7 are matched with the support G10 to realize limiting, the overlapped edge parts of the outer upper adjusting sheet 9 and the outer lower adjusting sheet 8 are always overlapped without separation, a complete enveloping surface is always formed, and the reliable maximum diameter nozzle state can be obtained, so that the safety and reliability of the working process of the adjustable nozzle are ensured.
Claims (10)
1. The utility model provides an aeroengine adjustable spray tube outer adjustment piece receive and releases stop device which characterized in that includes: a plurality of outer upper adjusting sheets (9) are circumferentially distributed and fixed on the support ring (1), and the front end of each outer upper adjusting sheet (9) is fixed on the support ring (1);
an outer lower adjusting sheet (8) is covered between every two adjacent outer upper adjusting sheets (9), the front end of each outer lower adjusting sheet (8) is fixed on the support ring (1), and the outer lower adjusting sheet (8) covers the gap between every two adjacent outer upper adjusting sheets (9); the partial surface of the outer upper adjusting sheet (9) is arranged below the gap of the two adjacent outer lower adjusting sheets (8);
the adjustable nozzle is characterized by further comprising a limiting assembly for expanding the outer upper adjusting sheet (9) and the outer lower adjusting sheet (8) in a radial maximum diameter state, and the limiting assembly can ensure that the outer lower adjusting sheet (8) cannot be separated from a ready limiting gap between the outer upper adjusting sheet (9) in the process of expanding the adjustable nozzle from a minimum diameter state to a maximum diameter state.
2. The aero-engine variable nozzle outer vane retraction and extension limiting device as claimed in claim 1, wherein: the limiting assembly comprises a support G (10) and a support F (7); two brackets G (10) with upwarping arc tail hook structures are fixed on opposite side edges of the outlet section of the outer lower adjusting sheet (8); the support F (7) with L-shaped two ends is fixed at the axial position of the outer upper adjusting sheet (9) corresponding to the support G (10), one L-shaped end of the support F (7) circumferentially spans between two supports G (10) of the outer lower adjusting sheet (8), and the other L-shaped end of the support F (7) circumferentially spans between two supports G (10) of the adjacent outer lower adjusting sheet (8), so that the distance between two ends of the support F (7) is the maximum state of radial expansion of the two adjacent outer lower adjusting sheets (8).
3. The aero-engine variable nozzle outer vane retraction and extension limiting device as claimed in claim 2, wherein: the front end of the outer upper adjusting sheet (9) is fixed on the support ring (1) through a screw; the front end of the outer lower adjusting sheet (8) is fixed on the support ring (1) through a screw.
4. The aero-engine variable nozzle outer vane retraction and extension limiting device as claimed in claim 3, wherein: the rear end of the outer upper adjusting sheet (9) is fixed with brackets C (4) and E (6) which are distributed at intervals in the axial direction; the bracket C (4) and the bracket E (6) extend out of the lower part of the gap between the two adjacent outer lower adjusting sheets (8).
5. The aero-engine variable nozzle outer vane retraction and extension limiting device as claimed in claim 4, wherein: and the bracket C (4) and the bracket E (6) are welded and fixed with the outer upper adjusting sheet (9).
6. The aero-engine variable nozzle outer vane retraction and extension limiting device as claimed in claim 4, wherein: the support C (4) and the support E (6) are connected with a movement executing mechanism, and the movement executing mechanism can be pulled up and put down through the support C (4) and the support E (6), so that the outer upper adjusting sheet (9) can be radially folded and unfolded in the radial direction of the support ring (1).
7. The aero-engine variable nozzle outer vane retraction and extension limiting device as claimed in claim 6, wherein: and the bracket C (4) and the bracket E (6) are provided with through holes for being connected with the motion executing mechanism through bolts.
8. The aero-engine variable nozzle outer vane retracting and limiting device as claimed in claim 2 or 6, wherein: the part surface of the outer upper adjusting sheet (9) positioned in the gap between two adjacent outer lower adjusting sheets (8) is fixedly provided with a bracket A (2), a bracket B (3) and a bracket D (5) which are axially distributed at intervals, and the bottom surfaces of the two sides of the bracket A (2), the bracket B (3) and the bracket D (5) have gaps with the top surface of the outer upper adjusting sheet (9); outer lower adjustment flap (8) insert support A (2), support B (3), support D (5) and outer clearance of last adjustment flap (9) along axial both sides limit in, the side of outer lower adjustment flap (8) corresponds with the fixed department of support A (2), support B (3), support D (5), outer lower adjustment flap (8) side obtains radially spacing when adjustable spray tube shrink to minimum motion position.
9. The aero-engine variable nozzle outer vane retraction and extension limiting device as claimed in claim 8, wherein: the support G (10) can be riveted or welded on the outer lower adjusting sheet (8) through a rivet (11).
10. The aero-engine variable nozzle outer vane retraction and extension limiting device as claimed in claim 8, wherein: and the bracket F (7) is welded or riveted and fixed on the outer upper adjusting sheet (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110950529.XA CN113530705A (en) | 2021-08-18 | 2021-08-18 | Retractable limiting device for outer adjusting piece of adjustable jet pipe of aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110950529.XA CN113530705A (en) | 2021-08-18 | 2021-08-18 | Retractable limiting device for outer adjusting piece of adjustable jet pipe of aircraft engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113530705A true CN113530705A (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110950529.XA Pending CN113530705A (en) | 2021-08-18 | 2021-08-18 | Retractable limiting device for outer adjusting piece of adjustable jet pipe of aircraft engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113530705A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017199A (en) * | 2021-11-15 | 2022-02-08 | 中国航发沈阳发动机研究所 | Mechanical area limit limiting method for double-ring control axisymmetric converging-diverging spray pipe |
| CN114352434A (en) * | 2022-01-27 | 2022-04-15 | 北京盈天航空动力科技有限公司 | Adjustable tail spray pipe structure of micro turbojet engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017199A (en) * | 2021-11-15 | 2022-02-08 | 中国航发沈阳发动机研究所 | Mechanical area limit limiting method for double-ring control axisymmetric converging-diverging spray pipe |
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| CN114352434A (en) * | 2022-01-27 | 2022-04-15 | 北京盈天航空动力科技有限公司 | Adjustable tail spray pipe structure of micro turbojet engine |
| CN114352434B (en) * | 2022-01-27 | 2023-01-17 | 北京盈天航空动力科技有限公司 | Adjustable tail spray pipe structure of micro turbojet engine |
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Application publication date: 20211022 |
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