High-temperature thin-walled component support constraint distributed structure

Abstract

This invention belongs to the field of aero-engine rotor design and provides a distributed support and constraint structure for high-temperature thin-walled components. The structure includes a thin-walled component for an afterburner, a thin-walled nozzle component mounted on the tail end of the afterburner thin-walled component, and a component hinge assembly installed between the outer surface of the tail nozzle thin-walled component and the tail end of the afterburner thin-walled component. An electrically controlled telescopic assembly for the thin-walled component is provided between the outer surface of the afterburner thin-walled component and the outer ring surface of the tail nozzle thin-walled component. In this invention, with the assistance of the electrically controlled telescopic assembly and the hinge assembly, the thin-walled components can be supported and constrained while simultaneously improving their fatigue resistance by reducing friction. Furthermore, the structure of the thin-walled components is non-uniformly distributed along the axial / circumferential directions, achieving a non-coordinated design effect through environmental excitation and the thin-walled components.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine design, specifically relating to a distributed structure for supporting and constraining high-temperature thin-walled components. Background Technology

[0002] Thin-walled structures are composed of thin plates, thin shells, and slender rods, enabling them to withstand large loads with relatively little weight and material. The purpose of the thin-walled structures in aero-engines, such as the afterburner and exhaust nozzle, is to protect the engine core and provide support for externally mounted engine components like fuel pumps, oil pumps, generators, gearboxes, and piping. The internal structures primarily house the stator and combustion chamber, forming an airflow channel together with the rotor assembly. However, these thin-walled components are easily exposed to the engine's high temperatures, making them prone to damage.

[0003] Because the high-temperature thin-walled components of the combustion chamber and the tailpipe are often subjected to high-temperature erosion, they are prone to metal fatigue. In addition, the thin-walled components on the tailpipe can expand and contract, and they form a hinged relationship with the thin-walled components on the combustion chamber. Due to the high temperature and the friction between them, the thin-walled components on the combustion chamber and the tailpipe will experience excessive metal fatigue. Under the influence of metal fatigue, the thin-walled components will fracture, deform, etc., making them unusable. However, by distributing the installation position of the thin-walled components non-uniformly along the axial / circumferential direction, and by utilizing the effect of non-coordination design between environmental excitation and the thin-walled components, the metal fatigue resistance of the thin-walled components and the supporting structure can be improved. Therefore, this invention proposes a high-temperature thin-walled component support constraint distributed structure with high fatigue resistance. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a distributed support and constraint structure for high-temperature thin-walled components, thereby resolving the issues in the prior art. The technical solution adopted by this invention is as follows: The high-temperature thin-walled component support and constraint distributed structure includes a thin-walled component for the afterburner, a connecting part, and a thin-walled component for the tail nozzle; The tail nozzle thin-walled component includes multiple tail nozzle thin-walled plates arranged in a ring around each other. The multiple tail nozzle thin-walled plates together form a hollow structure. The front end of the tail nozzle thin-walled plate is rotatably connected to the tail end of the afterburner thin-walled component. Each tail nozzle thin-walled plate is connected to the afterburner thin-walled component through the connecting part. The connecting portion includes a thin-walled component electronically controlled telescopic assembly and a component hinge assembly; one end of the thin-walled component electronically controlled telescopic assembly is rotatably connected to the outer wall surface of the tail nozzle thin-walled plate, and the other end of the thin-walled component electronically controlled telescopic assembly is rotatably connected to the outer wall surface of the afterburner thin-walled component; one end of the component hinge assembly is rotatably connected to the middle part of the thin-walled component electronically controlled telescopic assembly, and the other end of the component hinge assembly is rotatably connected to the end of the afterburner thin-walled component; The thin-walled component electronically controlled telescopic assembly is used for linear telescopic movement. The radial swing of the tail nozzle thin-walled plate is realized through the component hinge assembly. The multiple tail nozzle thin-walled plates change the inner diameter of the tail nozzle thin-walled component by radial deflection.

[0005] Furthermore, one side of the tail nozzle thin-walled plate is provided with a bayonet, and the other side is provided with a flange adapted to the bayonet. The bayonet of two adjacent tail nozzle thin-walled plates is nested on the flange.

[0006] Furthermore, a protrusion is fixedly connected to the end of the thin-walled tailpipe; The afterburner thin-walled component includes an inner combustion chamber liner, an outer combustion chamber liner fixed to the outer surface of the inner combustion chamber liner, and a plurality of coupling notches arranged in a ring array on the inner wall of the inner cavity of the inner combustion chamber liner. The coupling notches are adapted to the protrusions, and the protrusions are rotatably connected to the coupling notches.

[0007] Furthermore, the thin-walled component electrically controlled telescopic assembly includes an alloy hollow tube, an electrically controlled telescopic rod, and a rotating assembly; The two ends of the electrically controlled telescopic rod are respectively fixedly connected to two alloy hollow tubes, and the ends of the two alloy hollow tubes away from the electrically controlled telescopic rod are respectively connected to the rotating components.

[0008] Furthermore, the rotating assembly includes a bearing, a sleeve, a base, and a rotating shaft; The bearings are fixed on both sides of the top surface of the base. The bearings are rotatably connected to the shaft. The sleeve is rotatably connected to the outer ring surface of the shaft. The outer ring surface of the sleeve is fixedly connected to the two alloy hollow tubes at opposite ends. The bases of the two rotating components are respectively fixedly connected to the tail nozzle thin-walled plate and the afterburner thin-walled component.

[0009] Furthermore, the component hinge assembly includes two connecting plates, with a limit component provided on one end of the two connecting plates that are close to each other, and a hinge component provided on one end of the two connecting plates that are far from each other. The limiting component includes a hollow square tube and two connecting rods inserted inside the hollow square tube. The ends of the two connecting rods that are close to each other are fixedly connected to a limiting plate. An active chamber is opened inside the hollow square tube for the connecting rods to be inserted and passed through. The hinge assembly includes a fixing block. The fixing blocks of the two hinge assemblies are respectively fixed on the outer surface of the tail nozzle thin-walled plate and the afterburner thin-walled component. Bearing seats are installed on both sides of the top surface of the fixing block. A rotating column is rotatably connected to the side of the two bearing seats that are close to each other. A movable sleeve is fitted on the outer ring surface of the rotating column. The outer ring surface of the movable sleeve is fixedly connected to the ends of the two connecting plates that are far apart from each other.

[0010] The present invention has the following beneficial effects: With the assistance of the thin-walled component electronically controlled telescopic assembly and the component hinge assembly, the combustion chamber thin-walled component can be supported and constrained at the same time, and the fatigue resistance of the combustion chamber thin-walled component can be improved by reducing the friction between the tail nozzle thin-walled pieces; in addition, the structure of the tail nozzle thin-walled pieces is non-uniformly distributed along the circumference, and the effect of non-coordinated design is achieved by utilizing environmental excitation and the thin-walled component. Attached Figure Description

[0011] Figure 1 A three-dimensional schematic diagram of the external appearance of a distributed structure for supporting and constraining high-temperature thin-walled components; Figure 2 This is a schematic diagram of the external appearance of a thin-walled component of an afterburner. Figure 3 A schematic diagram of an electrically controlled telescopic assembly for a thin-walled component; Figure 4 for Figure 3 A magnified view of part A in the diagram; Figure 5 A schematic diagram of the hinge assembly between the thin-walled components of the afterburner and the thin-walled components of the tail nozzle. Figure 6 for Figure 5 A magnified view of part B in the diagram; Figure 7 Schematic diagram of the expansion of the support structure for the thin-walled component of the tail nozzle; Figure 8 This is a single three-dimensional schematic diagram of a thin-walled component of the tail nozzle; In the diagram: 1. Thin-walled component of afterburner; 11. Inner liner of combustion chamber; 12. Outer liner of combustion chamber; 13. Coupling notch; 2. Electrically controlled telescopic assembly of thin-walled component; 21. Alloy hollow tube; 22. Electrically controlled telescopic rod; 23. Bearing; 24. Sleeve; 25. Base; 26. Rotating shaft; 3. Thin-walled component of tail nozzle; 31. Thin-walled plate of tail nozzle; 32. Bayonet; 33. Protrusion; 4. Component hinge assembly; 41. Fixing block; 42. Bearing seat; 43. Connecting plate; 44. Hollow square tube; 45. Rotating column; 46. Movable sleeve; 47. Connecting rod; 48. Movable chamber; 49. Limiting plate. Detailed Implementation

[0012] The following will be based on embodiments of the present invention. Figures 1-8 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0013] The high-temperature thin-walled component support and constraint distributed structure includes a thin-walled component 1 for the afterburner, a connecting part, and a thin-walled component 3 for the tail nozzle; The tail nozzle thin-walled component 3 includes a plurality of tail nozzle thin-walled pieces 31 arranged in a ring around each other. The plurality of tail nozzle thin-walled pieces 31 together form a hollow structure. The ends of the tail nozzle thin-walled pieces 31 are rotatably connected to the ends of the afterburner thin-walled component 1. Each tail nozzle thin-walled piece 31 is connected to the afterburner thin-walled component 1 through the connecting part. The connecting part includes a thin-walled component electronically controlled telescopic assembly 2 and a component hinge assembly 4; one end of the thin-walled component electronically controlled telescopic assembly 2 is rotatably connected to the outer wall surface of the tail nozzle thin-walled plate 31, and the other end of the thin-walled component electronically controlled telescopic assembly 2 is rotatably connected to the outer wall surface of the afterburner thin-walled component 1; one end of the component hinge assembly 4 is rotatably connected to the middle part of the thin-walled component electronically controlled telescopic assembly 2, and the other end of the component hinge assembly 4 is rotatably connected to the end of the afterburner thin-walled component 1; The thin-walled component electronically controlled telescopic assembly 2 is used for linear telescopic movement. The radial deflection of the tail nozzle thin-walled piece 31 is achieved through the component hinge assembly 4. The multiple tail nozzle thin-walled pieces 31 change the inner diameter of the tail nozzle thin-walled component 3 through radial deflection.

[0014] When the electrically controlled telescopic assembly 2 of the thin-walled component of the present invention is working, it is constrained by the component hinge assembly 4, thereby generating a tensile force on the thin-walled plate 31 of the tail nozzle, causing the thin-walled plate 31 of the tail nozzle to deflect radially along the hollow structure it constitutes, thereby causing the thin-walled component 1 of the combustion chamber to expand or contract, and its inner diameter to change. Specifically, the electrically controlled telescopic assembly 2 of the thin-walled component is used to perform controlled linear telescopic motion along the axial direction, and the axial linear motion is converted into radial oscillation of the thin-walled plate 31 of the tail nozzle through the component hinge assembly 4. The radial oscillation is the adjustment of the rotation angle along the radial inward and outward directions, so as to precisely control the spatial position and angle of multiple thin-walled plates 31 of the tail nozzle, thereby adjusting and changing the inner diameter of the thin-walled component 3 of the tail nozzle through the collective radial oscillation of the thin-walled plate 31 of the tail nozzle, so as to adapt to the needs of nozzle area adjustment under different engine operating conditions.

[0015] In this invention, with the assistance of the thin-walled component electronically controlled telescopic assembly 2 and the component hinge assembly 4, the combustion chamber thin-walled component 1 can be supported and constrained while also improving the fatigue resistance of the combustion chamber thin-walled component 1 by reducing the friction between the tail nozzle thin-walled pieces 31; furthermore, the structure of the tail nozzle thin-walled pieces 31 is non-uniformly distributed along the circumference, and the effect of non-coordinated design is achieved by utilizing environmental excitation and the thin-walled component.

[0016] Specifically, in this invention, through the cooperation of the thin-walled component electronically controlled telescopic assembly 2 and the component hinge assembly 4, a flexible and adjustable hinge connection can be formed between the tail nozzle thin-walled plate 31 and the afterburner thin-walled component 1. During the movement of the components, the tail nozzle thin-walled plates 31 always maintain a certain gap with each other, avoiding friction and wear caused by direct contact between the thin-walled plates. Furthermore, during thermal expansion or contraction, each thin-walled plate can freely swing radially and have a slight axial displacement to release and disperse the stress concentration caused by temperature gradient and load within the structure, thereby effectively reducing the accumulation of fatigue damage under high-frequency vibration, impact load and thermal load, and significantly improving the overall fatigue resistance of the thin-walled component.

[0017] The hinge assembly 4 of the present invention is installed by the cooperation of the fixing block 41 and the bearing seat 42, and the rotating column 45 drives the movable sleeve 46 to achieve a smooth transition between the connecting plates. During the movement, the linkage between the movable sleeve 46 and the connecting plate 43 can coordinate the movement of each component, so as to maintain a reasonable contact angle and gap between the tail nozzle thin-walled plate 31 and the afterburner thin-walled component 1 in the expansion or contraction state, and fully reduce mechanical friction.

[0018] Furthermore, one side of the tail nozzle thin-walled plate 31 is provided with a bayonet 32, and the other side is provided with a flange adapted to the bayonet 32, and the bayonet 32 ​​of two adjacent tail nozzle thin-walled plates 31 are nested on the flange.

[0019] Furthermore, a protrusion 33 is fixedly connected to the end of the tail nozzle thin-walled plate 31; The afterburner thin-walled component 1 includes an inner combustion chamber liner 11, an outer combustion chamber liner 12 fixed on the outer surface of the inner combustion chamber liner 11, and a plurality of coupling notches 13 arranged in a ring array on the inner cavity sidewall of the inner combustion chamber liner 11. The coupling notches 13 are adapted to the protrusions 33, and the protrusions 33 are rotatably connected to the coupling notches 13.

[0020] Furthermore, the thin-walled component electrically controlled telescopic assembly 2 includes an alloy hollow tube 21, an electrically controlled telescopic rod 22, and a rotating assembly; The two ends of the electrically controlled telescopic rod 22 are respectively fixedly connected to two alloy hollow tubes 21, and the ends of the two alloy hollow tubes 21 away from the electrically controlled telescopic rod 22 are respectively connected to the rotating components.

[0021] Furthermore, the rotating assembly includes a bearing 23, a sleeve 24, a base 25, and a rotating shaft 26; The bearings 23 are fixed on both sides of the top surface of the base 25. The bearings 23 are rotatably connected to the shaft 26. The outer ring surface of the shaft 26 is rotatably connected to the sleeve 24. The outer ring surface of the sleeve 24 is fixedly connected to the two alloy hollow tubes 21 at opposite ends. The bases 25 of the two rotating components are respectively fixedly connected to the tail nozzle thin-walled plate 31 and the outer liner 12 of the combustion chamber thin-walled component 1.

[0022] Furthermore, the component hinge assembly 4 includes two connecting plates 43, with a limiting component provided on one end of the two connecting plates 43 that are close to each other, and a hinge component provided on one end of the two connecting plates 43 that are far from each other. The limiting assembly includes a hollow square tube 44 and two connecting rods 47 inserted inside the hollow square tube 44. The ends of the two connecting rods 47 that are close to each other are fixedly connected to a limiting plate 49. The hollow square tube 44 has an open movable chamber 48 for the connecting rods 47 to be inserted through. The hinge assembly includes a fixing block 41. The two fixing blocks 41 of the hinge assembly are respectively fixed to the outer surface of the combustion chamber liner 11 of the tail nozzle thin-walled plate 31 and the combustion chamber thin-walled component 1. Bearing seats 42 are installed on both sides of the top surface of the fixing block 41. A rotating column 45 is rotatably connected to the side of the two bearing seats 42 that is close to each other. A movable sleeve 46 is sleeved on the outer ring surface of the rotating column 45. The outer ring surface of the movable sleeve 46 is fixedly connected to the ends of the two connecting plates 43 that are far apart from each other.

[0023] In this invention, when the control end of the thin-walled component electronically controlled telescopic assembly 2 retracts the output shaft under the control of the controller, the output shaft will drive the alloy hollow tubes 21 to move closer to each other, and the sleeve 24 will also rotate on the outer surface of the rotating shaft 26. At the same time, restricted by the bearing 23 and the base 25, the rotational force of the sleeve 24 will be converted into a pull on the tail nozzle thin-walled plate 31. At this time, the flange part of the tail nozzle thin-walled plate 31 that was originally coupled with the bayonet 33 will disengage from the bayonet 33, and the tail nozzle thin-walled component 3 will be in an expanded state.

[0024] In this invention, during the process of the thin-walled component electronically controlled telescopic assembly 2 pulling the thin-walled component 3 of the tail nozzle to expand, the two fixed blocks 41 will also move closer to each other and drive the movable sleeve 46 to rotate on the outer ring of the rotating column 45. At this time, the connecting plate 43 will be affected by the rotation of the movable sleeve 46 and move closer to each other, and the connecting plate 43 will push the connecting rod 47 to move in the inner cavity of the movable chamber 48 while moving closer to each other. With the help of the hinge of the component hinge assembly 4, the end of the expanded tail nozzle thin-walled piece 31 that is close to the afterburner thin-walled component 1 does not contact the tail end of the combustion chamber inner liner 11, so that the tail nozzle thin-walled piece 31 and the combustion chamber inner liner 11 do not have too much friction to complete the expansion or contraction effect, thereby improving the fatigue resistance of the tail nozzle thin-walled component 3.

[0025] The working principle of this invention is as follows: When the control end of the electrically controlled telescopic rod 22 retracts the output shaft under the control of the controller, the output shaft will drive the alloy hollow tubes 21 to move closer to each other, and the sleeve 24 will also rotate on the outer surface of the rotating shaft 26. At the same time, restricted by the bearing 23 and the base 25, the rotational force of the sleeve 24 will be converted into a pull on the tail nozzle thin-walled component 3. At this time, the protruding part of the tail nozzle thin-walled plate 31 that was originally coupled with the bayonet 32 ​​will disengage from the bayonet 32, and the tail nozzle thin-walled component 3 will be in an expanded state.

[0026] In the process of the thin-walled component electronically controlled telescopic assembly 2 pulling the thin-walled component 3 of the tail nozzle to expand, the two fixed blocks 41 will also move closer to each other and drive the movable sleeve 46 to rotate on the outer ring of the rotating column 45. At this time, the connecting plate 43 will be affected by the rotation of the movable sleeve 46 and move closer to each other, and the connecting plate 43 will push the connecting rod 47 to move in the inner cavity of the movable chamber 48. With the help of the hinge of the component hinge assembly 4, the end of the expanded tail nozzle thin-walled piece 31 that is close to the afterburner thin-walled component 1 does not contact the tail end of the combustion chamber inner liner 11, so that the expansion / contraction effect is achieved without too much friction between the tail nozzle thin-walled piece 31 and the combustion chamber inner liner 11, thereby improving the fatigue resistance of the thin-walled component.

[0027] Similarly, when the thin-walled component electronically controlled telescopic assembly 2 and the component hinge assembly 4 move in opposite directions, the tail nozzle thin-walled plate 31 will be reassembled, the protruding part on the tail nozzle thin-walled plate 31 will be re-engaged into the slot 32, and the protrusion 33 will also be coupled to the coupling notch 13 on the inner wall of the combustion chamber liner 11.

[0028] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, substitutions, or variations made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A distributed structure for supporting and constraining high-temperature thin-walled components, characterized in that, Including the afterburner thin-walled component (1), the connecting part and the tail nozzle thin-walled component (3); The tail nozzle thin-walled component (3) includes a plurality of tail nozzle thin-walled pieces (31) arranged in a ring around each other. The plurality of tail nozzle thin-walled pieces (31) together form a hollow structure. The front end of the tail nozzle thin-walled piece (31) is rotatably connected to the tail end of the afterburner thin-walled component (1). Each tail nozzle thin-walled piece (31) is connected to the afterburner thin-walled component (1) through the connecting part. The connecting part includes a thin-walled component electronically controlled telescopic assembly (2) and a component hinge assembly (4); one end of the thin-walled component electronically controlled telescopic assembly (2) is rotatably connected to the outer wall surface of the tail nozzle thin-walled plate (31), and the other end of the thin-walled component electronically controlled telescopic assembly (2) is rotatably connected to the outer wall surface of the afterburner thin-walled component (1); one end of the component hinge assembly (4) is rotatably connected to the middle part of the thin-walled component electronically controlled telescopic assembly (2), and the other end of the component hinge assembly (4) is rotatably connected to the end of the afterburner thin-walled component (1); The thin-walled component electronically controlled telescopic assembly (2) is used for linear telescopic movement. The radial swing of the tail nozzle thin-walled piece (31) is achieved through the component hinge assembly (4). The multiple tail nozzle thin-walled pieces (31) change the inner diameter of the tail nozzle thin-walled component (3) by radial deflection.

2. The high-temperature thin-walled component support and constraint distributed structure as described in claim 1, characterized in that, One side of the tail nozzle thin-walled plate (31) is provided with a slot (32), and the other side is provided with a flange that is adapted to the slot (32). The slots (32) of two adjacent tail nozzle thin-walled plates (31) are nested on the flange.

3. The high-temperature thin-walled component support and constraint distributed structure as described in claim 2, characterized in that, The end of the tail nozzle thin-walled plate (31) is fixedly connected to the protrusion (33). The afterburner thin-walled component (1) includes an inner combustion chamber liner (11), an outer combustion chamber liner (12) fixed on the outer surface of the inner combustion chamber liner (11), and a plurality of coupling notches (13) arranged in a ring array on the inner wall of the inner cavity of the inner combustion chamber liner (11). The coupling notches (13) are adapted to the protrusions (33), and the protrusions (33) are rotatably connected to the coupling notches (13).

4. The high-temperature thin-walled component support and constraint distributed structure as described in claim 2, characterized in that, The thin-walled component electrically controlled telescopic assembly (2) includes an alloy hollow tube (21), an electrically controlled telescopic rod (22), and a rotating assembly; The two ends of the electrically controlled telescopic rod (22) are respectively fixedly connected to two alloy hollow tubes (21), and the ends of the two alloy hollow tubes (21) away from the electrically controlled telescopic rod (22) are respectively connected to the rotating components.

5. The high-temperature thin-walled component support and constraint distributed structure as described in claim 4, characterized in that, The rotating assembly includes a bearing (23), a sleeve (24), a base (25), and a rotating shaft (26). The bearings (23) are fixed on both sides of the top surface of the base (25). The bearing (23) is rotatably connected to the shaft (26). The sleeve (24) is rotatably connected to the outer ring surface of the shaft (26). The outer ring surface of the sleeve (24) is fixedly connected to one end of the two alloy hollow tubes (21) that are far apart from each other. The bases (25) of the two rotating components are respectively fixedly connected to the tail nozzle thin-walled plate (31) and the afterburner thin-walled component (1).

6. The high-temperature thin-walled component support and constraint distributed structure as described in claim 1, characterized in that, The component hinge assembly (4) includes two connecting plates (43), with a limit component provided on one end of the two connecting plates (43) that are close to each other, and a hinge component provided on one end of the two connecting plates (43) that are far apart from each other; The limiting assembly includes a hollow square tube (44) and two connecting rods (47) inserted inside the hollow square tube (44). The ends of the two connecting rods (47) that are close to each other are fixedly connected to a limiting plate (49). An active chamber (48) is opened inside the hollow square tube (44) for the connecting rods (47) to be inserted through. The hinge assembly includes a fixing block (41). The fixing blocks (41) of the two hinge assemblies are respectively fixed on the outer surfaces of the tail nozzle thin-walled plate (31) and the afterburner thin-walled member (1). Bearing seats (42) are installed on both sides of the top surface of the fixing block (41). A rotating column (45) is rotatably connected to the side of the two bearing seats (42) that is close to each other. A movable sleeve (46) is sleeved on the outer ring surface of the rotating column (45). The outer ring surface of the movable sleeve (46) is fixedly connected to the ends of the two connecting plates (43) that are far apart from each other.

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