CN114991991B - Stress application vibration-proof heat shield with cold air adjustable function - Google Patents
Stress application vibration-proof heat shield with cold air adjustable function Download PDFInfo
- Publication number
- CN114991991B CN114991991B CN202210601993.2A CN202210601993A CN114991991B CN 114991991 B CN114991991 B CN 114991991B CN 202210601993 A CN202210601993 A CN 202210601993A CN 114991991 B CN114991991 B CN 114991991B
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- Prior art keywords
- vibration
- hole
- heat shield
- proof heat
- adjusting
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- 238000002156 mixing Methods 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 7
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
-
- 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
-
- 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
- F02C7/12—Cooling of plants
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
Abstract
The invention provides a stress application vibration-proof heat shield with a cold air adjustable function, which comprises: the double-layer vibration-proof heat shield is provided with impact plates and divergent plates which are arranged at intervals, the impact plates are provided with corrugated structures, and the wave crests of the corrugated structures are provided with variable blending holes; the adjusting valve is rotatably arranged at the outer side of the impact plate and can be in contact fit with the wave crest of the corrugated structure, and an adjusting hole which is communicated with the variable blending hole in a fit manner is formed in the adjusting valve; and the driving assembly is connected with the adjusting valve and can drive the adjusting valve to rotate relative to the corrugated structure and change the flow area between the adjusting hole and the variable blending hole. Through setting up drive assembly and adjustment valve, can realize the change of the flow area between adjustment hole and the variable blending hole to make afterburning vibration-proof heat screen have the air conditioning function, and then can be applicable to the great variable cycle engine cooling design of duct ratio change.
Description
Technical Field
The invention relates to the technical field of aeroengines, in particular to a stress application vibration-proof heat shield with a cold air adjustable function.
Background
With the improvement of the mobility requirements of fighter plane, the gas temperature of the boost outlet of the modern advanced engine can reach more than 2100K, and meanwhile, in order to reduce the fuel consumption rate of the engine, the consumption of engine cooling gas is continuously reduced, and particularly in a variable cycle engine, compared with a conventional engine, the engine has the most remarkable characteristics that the engine is in an engine working envelope, the range of the bypass ratio is larger, if the fixed open pore area is adopted for cooling design, the boost combustion efficiency is greatly changed under different working conditions, and great challenges are brought to the cooling design of the boost vibration-proof heat shield.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide a stress vibration-proof heat shield having a cold air adjusting function, so as to achieve the stress vibration-proof heat shield having the cold air adjusting function.
The embodiment of the specification provides the following technical scheme: a stress application vibration-proof heat shield having a cold air adjustable function, comprising:
the double-layer vibration-proof heat shield is provided with impact plates and divergent plates which are arranged at intervals, the impact plates are provided with corrugated structures, and the wave crests of the corrugated structures are provided with variable blending holes;
the adjusting valve is rotatably arranged at the outer side of the impact plate and can be in contact fit with the wave crest of the corrugated structure, and an adjusting hole which is communicated with the variable blending hole in a fit manner is formed in the adjusting valve;
and the driving assembly is connected with the adjusting valve and can drive the adjusting valve to rotate relative to the corrugated structure and change the flow area between the adjusting hole and the variable blending hole.
Further, the trough of the corrugated structure is provided with an impact hole, the adjusting valve is provided with a fixed blending hole, and the fixed blending hole corresponds to the impact hole in position and is always communicated.
Further, the ratio of the area of the fixed blending orifice to the area of the impingement orifice is greater than or equal to 1.2.
Further, the ratio of the pore diameter of the regulating pore to the pore diameter of the variable blending pore is in the range of 0.8 to 1.2.
Further, a plurality of vibration-proof holes and a plurality of dispersing holes are formed in the dispersing plate, the impact holes and the variable mixing holes at the impact plate are multiple, and the sum of the areas of the multiple impact holes and the multiple variable mixing holes is smaller than the sum of the areas of the multiple vibration-proof holes and the multiple dispersing holes.
Further, the contact surface between the wave crest and the adjusting valve is provided with a wear-resistant coating.
Further, the drive assembly includes:
the actuating cylinder is arranged at the outer side of the boosting cylinder casing;
one end of the rocker arm is connected with the actuating cylinder;
the transmission crank is rotatably arranged on a transmission crank mounting seat of the boosting cylinder casing, one end of the transmission crank penetrates through the boosting cylinder casing and is connected with the other end of the rocker arm, and the other end of the transmission crank is connected with the adjusting valve and can drive the adjusting valve to rotate relative to the double-layer vibration-proof heat shield.
Further, the driving assembly further comprises a sliding block assembly, and the sliding block assembly is arranged on the adjusting valve and connected with the other end of the transmission crank.
Further, the double-layer vibration-proof heat shield also comprises a supporting ring which is arranged between the impact plate and the divergence plate, and two ends of the supporting ring are respectively connected with the impact plate and the divergence plate.
Compared with the prior art, the beneficial effects that above-mentioned at least one technical scheme that this description embodiment adopted can reach include at least: through setting up drive assembly and adjustment valve, can realize the change of the flow area between adjustment hole and the variable blending hole to make afterburning vibration-proof heat screen have the air conditioning function, and then can be applicable to the great variable cycle engine cooling design of duct ratio change.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a double layer vibration-proof heat shield;
FIG. 3 is a schematic structural view of an adjustment mechanism;
fig. 4 is an enlarged schematic view of the structure of the end surface of the vibration-proof heat shield and the adjusting mechanism.
Reference numerals in the drawings: 11. a stressing barrel casing; 12. a double layer vibration-proof heat shield; 13. an adjusting mechanism; 20. an impingement plate; 21. a dispersion plate; 22. a support ring; 23. a bow assembly; 24. a rivet; 25. a front section of the impingement plate; 26. the middle section of the impact plate; 27. the rear section of the impact plate; 28. a corrugated structure; 30. an actuator cylinder; 31. a rocker arm; 32. a drive crank; 33. a slider assembly; 34. adjusting the valve; 40. an impingement hole; 41. a variable blending orifice; 42. vibration-proof holes; 43. a divergent aperture; 44. fixing the blending hole; 45. and adjusting the hole.
Detailed Description
Embodiments of the present application are described in detail below with reference to the accompanying drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 4, the embodiment of the present invention provides a forced vibration-proof heat shield with a cool air adjusting function, including a double-layered vibration-proof heat shield 12, an adjusting shutter 34, and a driving assembly. The double-layer vibration-proof heat shield 12 is provided with impact plates 20 and dispersing plates 21 which are arranged at intervals, the impact plates 20 are provided with corrugated structures 28, and the wave crests of the corrugated structures 28 are provided with variable blending holes 41; the adjusting valve 34 is rotatably arranged on the outer side of the impact plate 20, the adjusting valve 34 can be in contact fit with the wave crest of the corrugated structure 28, and the adjusting valve 34 is provided with an adjusting hole 45 which is in fit communication with the variable blending hole 41; a drive assembly is coupled to the adjustment flap 34 and is capable of driving the adjustment flap 34 in rotation relative to the bellows structure 28, the drive assembly being capable of varying the flow area between the adjustment orifice 45 and the variable blending orifice 41.
By providing the drive assembly and the adjustment flap 34, a change in the flow area between the adjustment aperture 45 and the variable blending aperture 41 can be achieved, thereby providing the stress application vibration isolation heat shield with a cold air adjustment function, and thus being applicable to variable cycle engine cooling designs with large bypass ratio changes.
Wherein, the double-layer vibration-proof heat screen 12 is arranged in the stressing barrel casing 11, and the double-layer vibration-proof heat screen 12 comprises an impact plate 20, a dispersing plate 21, a supporting ring 22, a bow-shaped bracket assembly 23 and a rivet 24; the striking plate 20 includes: the front section 25, the middle section 26 and the rear section 27 of the impact plate are connected through riveting or welding, and the corrugated structure 28 is arranged on the middle section 26 of the impact plate.
As shown in fig. 1 and 4, the wave trough of the corrugated structure 28 is provided with an impact hole 40, and the adjusting shutter 34 is provided with a fixed blending hole 44, and the fixed blending hole 44 corresponds to the position of the impact hole 40 and is always communicated. Providing the fixed blending holes 44 and impingement holes 40 ensures minimal cold air ingress, thereby enabling the forced vibration-proof heat shield to have a basic cooling function.
Preferably, the ratio of the area of the fixed blending bore 44 to the area of the impingement bore 40 is greater than or equal to 1.2 to ensure efficient impingement bore air intake.
The ratio of the aperture of the adjustment hole 45 to the aperture of the variable blending hole 41 is in the range of 0.8 to 1.2. The aperture of the adjustment hole 45 is defined with the aperture of the variable blending hole 41 in order to increase the smoothness at the time of adjustment and to allow the application to cover a wider adjustment range.
The dispersion plate 21 is provided with a plurality of vibration preventing holes 42 and a plurality of dispersing holes 43, and the impact plate 20 is provided with a plurality of impact holes 40 and variable mixing holes 41, and the sum of the areas of the plurality of impact holes 40 and the plurality of variable mixing holes 41 is smaller than the sum of the areas of the plurality of vibration preventing holes 42 and the plurality of dispersing holes 43. The purpose of this is to throttle the impingement plate 20 during operation.
In this embodiment, the contact end surface of the adjusting shutter 34 and the double-layer vibration-proof heat shield 12 is at the crest, so that the friction contact area can be reduced, and thus the risk of the mechanism jamming is reduced, preferably, the contact surface of the crest and the adjusting shutter 34 is provided with a wear-resistant coating, so that the friction resistance can be reduced, and the service life of the heat shield is prolonged.
The adjusting shutter 34 has a full ring structure, and moves spirally during the adjustment.
As shown in fig. 3, the driving assembly includes: a cylinder 30, a rocker arm 31 and a drive crank 32. The actuator cylinder 30 is arranged outside the stressing cylinder housing 11; one end of the rocker arm 31 is connected with the actuator cylinder 30; the transmission crank 32 is rotatably arranged on a transmission crank mounting seat of the booster cylinder casing 11, one end of the transmission crank 32 penetrates through the booster cylinder casing 11 and is connected with the other end of the rocker arm 31, and the other end of the transmission crank 32 is connected with the adjusting valve 34 and can drive the adjusting valve 34 to rotate relative to the double-layer vibration-proof heat shield 12.
Further, the driving assembly further includes a slider assembly 33, and the slider assembly 33 is disposed on the adjustment shutter 34 and connected to the other end of the driving crank 32.
The actuating cylinder 30 is driven by hydraulic pressure, and pushes the rocker arm 31 to rotate around the transmission crank 32, so as to drive the transmission crank 32 to rotate, and then the sliding block assembly 33 drives the regulating valve 34 to spirally move along the axis of the engine; the adjusting valve 34 is a full-ring revolution body structure, is in contact fit with the peak end face of the impact plate 20, and changes the relative position of the variable mixing hole 41 when the adjusting valve 34 moves, so that the function of adjusting the air inlet area is realized.
In this embodiment, the adjusting valve 34 and the driving component form the adjusting mechanism 13, the booster barrel casing 11 is provided with a transmission crank mounting seat, and the booster barrel casing 11 adopts a split structure to facilitate the assembly of the adjusting mechanism 13 and the double-layer vibration-proof heat shield 12.
The double-layered vibration-proof heat shield 12 further includes a support ring 22 provided between the impact plate 20 and the dispersion plate 21, and both ends of the support ring 22 are connected to the impact plate 20 and the dispersion plate 21, respectively. The supporting ring 22 is fixed on the impact plate 20 by welding or riveting, and is used for supporting the channel height between the impact plate 20 and the dispersing plate 21, so as to ensure the cooling structure.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (9)
1. A stress application vibration-proof heat shield with a cold air adjustable function, comprising:
the double-layer vibration-proof heat screen (12) is provided with impact plates (20) and divergent plates (21) which are arranged at intervals, the impact plates (20) are provided with corrugated structures (28), and the wave crests of the corrugated structures (28) are provided with variable blending holes (41);
the adjusting valve (34) is rotatably arranged at the outer side of the impact plate (20), the adjusting valve (34) can be in contact fit with the wave crest of the corrugated structure (28), and the adjusting valve (34) is provided with an adjusting hole (45) communicated with the variable blending hole (41);
and the driving assembly is connected with the adjusting valve (34) and can drive the adjusting valve (34) to rotate relative to the corrugated structure (28) and change the flow area between the adjusting hole (45) and the variable mixing hole (41).
2. The stress-enhanced vibration-proof heat shield with cold air adjustable function according to claim 1, wherein the wave trough of the corrugated structure (28) is provided with an impact hole (40), the adjusting valve (34) is provided with a fixed blending hole (44), and the fixed blending hole (44) corresponds to the impact hole (40) and is always communicated.
3. The forced vibration-proof heat shield with cold air adjustable function according to claim 2, characterized in that the ratio of the area of the fixed blending hole (44) to the area of the impingement hole (40) is greater than or equal to 1.2.
4. The stress-vibration-proof heat shield with cold air adjusting function according to claim 1, wherein the ratio of the aperture of the adjusting hole (45) to the aperture of the variable blending hole (41) is in the range of 0.8 to 1.2.
5. The forced vibration-proof heat shield with cold air adjustable function according to claim 2, characterized in that the divergent plate (21) is provided with a plurality of vibration-proof holes (42) and a plurality of divergent holes (43), the impingement holes (40) and the variable blending holes (41) at the impingement plate (20) are each plural, and the sum of the areas of the plurality of impingement holes (40) and the plurality of variable blending holes (41) is smaller than the sum of the areas of the plurality of vibration-proof holes (42) and the plurality of divergent holes (43).
6. The stress-enhanced vibration-proof heat shield with cold air adjusting function according to claim 1, wherein the contact surface of the peak with the adjusting shutter (34) is provided with a wear-resistant coating.
7. The force-enhancing vibration-resistant heat shield with cold air tunable function of claim 1, wherein the drive assembly comprises:
the actuating cylinder (30) is arranged outside the stressing cylinder casing (11);
one end of the rocker arm (31) is connected with the actuating cylinder (30);
the transmission crank (32) is rotatably arranged on a transmission crank mounting seat of the boosting cylinder casing (11), one end of the transmission crank (32) penetrates through the boosting cylinder casing (11) and is connected with the other end of the rocker arm (31), and the other end of the transmission crank (32) is connected with the adjusting valve (34) and can drive the adjusting valve (34) to rotate relative to the double-layer vibration-proof heat shield (12).
8. The forced vibration-proof heat shield with cold air adjustable function according to claim 7, characterized in that the driving assembly further comprises a slider assembly (33), the slider assembly (33) being provided on the adjusting shutter (34) and being connected to the other end of the transmission crank (32).
9. The stress-enhanced vibration-proof heat shield with cold air adjusting function according to claim 1, wherein the double-layered vibration-proof heat shield (12) further comprises a support ring (22) disposed between the impingement plate (20) and the divergent plate (21), both ends of the support ring (22) being connected to the impingement plate (20) and the divergent plate (21), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210601993.2A CN114991991B (en) | 2022-05-30 | 2022-05-30 | Stress application vibration-proof heat shield with cold air adjustable function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210601993.2A CN114991991B (en) | 2022-05-30 | 2022-05-30 | Stress application vibration-proof heat shield with cold air adjustable function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114991991A CN114991991A (en) | 2022-09-02 |
| CN114991991B true CN114991991B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210601993.2A Active CN114991991B (en) | 2022-05-30 | 2022-05-30 | Stress application vibration-proof heat shield with cold air adjustable function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115992776B (en) * | 2023-03-23 | 2023-06-02 | 中国航发沈阳发动机研究所 | Rear thrust increasing component of engine turbine |
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| CN114991991A (en) | 2022-09-02 |
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