Bird-like wing feather membrane flap structure air release valve device and control method

Abstract

The application discloses a gas release valve device and a control method of a bird wing membrane flap structure, which comprises a shell, a piston, a left end bionic gas release valve, a middle bionic gas release valve and a right end bionic gas release valve, and the upper and lower end faces of the shell are respectively provided with an exhaust port and an air inlet. The bionic gas release valve device is connected by the left end bionic gas release valve, the right end bionic gas release valve and the middle bionic gas release valve through the piston and a connecting column, the piston can slide in the piston pin seat, and the opening and closing control of the gas release valve is realized. The gas release valve device is inspired by the bird wing membrane flap structure, a pressure difference exists on both sides of the gas release valve, the membrane flap structure is bent, when the pressure difference exceeds a critical value, the long and short flaps of the membrane flap are separated to form an air duct, the gas is discharged, and the effect of protecting the airplane engine is achieved. The gas release valve device is simple in structure, stable and reliable, low in cost and easy to popularize.

Description

Technical Field

[0001] This invention relates to the field of civil aviation technology, and in particular to a venting valve device and control method with a bird-inspired wing feather flap structure. Background Technology

[0002] The compressor in an aircraft gas turbine engine uses high-speed rotating blades to perform work on the air and increase its pressure. However, if the compressor experiences surge, it will cause serious damage to the components in a short period of time. For engine safety, the compressor must never operate in the surge zone. The engine stability control system can effectively prevent compressor surge, and it mainly includes the Variable Stator Vane System (VSV) and the Variable Bleed Valve System (VBV).

[0003] In existing technology, the VBV adjustable bleed valve control subsystem controls the opening or closing of the bleed valve through the VSV feedback signal of the adjustable stator vane control subsystem. However, the signal processing and transmission process introduces a certain time delay. This design results in lag in engine stability control, making it difficult for the bleed valve to open immediately. This causes the VBV system and engine to be under high pressure for a period of time, accelerating component aging and affecting engine operational stability. Simultaneously, the VBV system receives control signals from the VSV system and issues commands to open and close the bleed valve. The VBV system relies on the electronic control system for operation. If the electronic control system experiences a power outage or other malfunction, the bleed valve will fail to open properly, causing a sharp rise in internal engine pressure, potentially leading to overall engine failure. Furthermore, the VBV system itself can also experience mechanical failures, such as valve jamming or flexible shaft slippage.

[0004] Therefore, existing technologies still need further improvement and development. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a venting valve device with a bird wing feather flap structure. The venting valve opens and closes through the mechanical properties of the structure itself, which has a significant effect on solving the above problems. This invention can be mounted on the exhaust port of an aircraft engine. When the VBV adjustable venting valve control subsystem fails, it can automatically open when the engine is overpressured without relying on the control signal, protecting the parts, preventing aging, ensuring engine safety, and improving efficiency, energy saving and emission reduction by controlling the flow rate.

[0006] The technical solution of the present invention is as follows:

[0007] A venting valve device with a bird wing feather flap-like structure, comprising:

[0008] The housing has an exhaust port and an air inlet on its upper and lower end faces, respectively.

[0009] A left-end bionic venting valve is disposed inside the housing. One side of the left-end bionic venting valve is inserted and connected to one side of the housing. The other side of the left-end bionic venting valve is provided with a first piston cavity and a first bionic flap unit with a bird wing flap structure that can be opened by active driving force or by automatic airflow exceeding critical pressure.

[0010] A central bionic venting valve is located in the middle of the housing and connected to the left-end bionic venting valve. One side of the central bionic venting valve is provided with a first piston slider that is movably connected to the first piston chamber, and a second bionic flap unit with a bird wing feather flap structure that can be controlled to open by active driving force or by automatic airflow exceeding a critical pressure. The other side of the central bionic venting valve is provided with a second piston chamber and a third bionic flap unit with a bird wing feather flap structure that can be controlled to open by active driving force or by automatic airflow exceeding a critical pressure.

[0011] The right-end bionic vent valve is located on the other side of the housing and is connected to the middle bionic vent valve. The side of the right-end bionic vent valve connected to the middle bionic vent valve is provided with a second piston slider that is movably connected to the second piston cavity, and a fourth bionic flap unit with a bird wing flap structure that can be opened by active driving force or by automatic airflow exceeding the critical pressure.

[0012] A piston, located at the other end of the housing, is connected to the right-end bionic venting valve. It is used to receive external active driving force to actively drive and control the opening and closing of the left-end bionic venting valve, the middle bionic venting valve, and the right-end bionic venting valve.

[0013] The aforementioned bird wing feather flap structure venting valve device, wherein the first piston cavity consists of two parts respectively located at the two ends of the left bionic venting valve side, the first piston cavity is a rectangular piston cavity, and the first piston cavity is recessed to accommodate the reciprocating movement of the first piston slider.

[0014] The aforementioned venting valve device with a bird-like wing feather flap structure, wherein the first bionic flap unit includes: a first connecting post base and a first bionic flap elongated petal alternately arranged between the two first piston cavities, the first bionic flap elongated petal being configured with a bird-like wing feather flap structure.

[0015] The aforementioned bird-inspired wing flap structure for venting valves, wherein there are two first piston sliders, which are respectively disposed at both ends of one side of the central bionic venting valve, and a first locking block is provided at the end of the first piston slider.

[0016] The second biomimetic flap unit includes: a first connecting post slide cover disposed between two first piston sliders and inserted into and connected to the first connecting post base, and a first biomimetic flap short flap; the first biomimetic flap short flap adopts a bird wing feather flap structure.

[0017] The second piston cavity consists of two parts, one on each side of the other end of the central bionic vent valve. The second piston cavity is a rectangular piston cavity, and a second concave cavity is provided within the second piston cavity.

[0018] The third biomimetic flap unit includes: a second connecting post base and a second biomimetic flap long flap alternately arranged between the two second piston cavities, wherein the second biomimetic flap long flap adopts a bird wing feather flap structure.

[0019] The aforementioned bird-inspired wing flap structure deflation valve device, wherein the second piston slider of the right-end bionic deflation valve is two, respectively disposed at both ends of one side of the right-end bionic deflation valve, and a second locking block is provided at the end of the second piston slider;

[0020] The fourth biomimetic flap unit includes: a second connecting post slide cover that is inserted and connected to the second connecting post base and disposed between the two second piston sliders; the second biomimetic flap short flap adopts a bird wing feather flap structure.

[0021] The aforementioned bird-inspired wing flap structure venting valve device has one end of the piston configured to be flush with the right-end bionic venting valve, and the other end of the piston is provided with a piston rod for receiving external active driving force, the piston rod protruding from the outside of the housing.

[0022] The aforementioned venting valve device with a bird-like wing feather flap structure, wherein the housing comprises:

[0023] An upper outer shell is provided on the upper end face of the housing, and the air outlet is provided on the opening of the upper outer shell;

[0024] The lower outer shell is provided on the lower end face of the housing, and the air inlet is provided on the opening of the lower outer shell;

[0025] The front outer shell is located on the front end face of the housing.

[0026] The rear outer casing is located on the rear end face of the housing.

[0027] The left end shell is located on the left end face of the housing.

[0028] And the right end shell located on the right end face of the housing.

[0029] The aforementioned bird-inspired wing flap structure venting valve device, wherein the inner side of the left end outer shell is provided with a connecting post that is inserted and connected to the left end bionic venting valve;

[0030] A piston guide sleeve is provided on the outer side of the right end of the outer casing to guide the piston rod.

[0031] The aforementioned air release valve device with a bird-inspired wing feather flap structure, wherein the stiffness of the short flap of the bionic membrane is less than the stiffness of the long flap of the bionic membrane.

[0032] The left-end bionic venting valve, the middle bionic venting valve, and the right-end bionic venting valve are made of aerospace aluminum alloy material.

[0033] The upper shell, the lower shell, the front shell, the rear shell, the left shell, and the right shell are made of aerospace aluminum alloy.

[0034] The piston and piston rod are made of cast iron.

[0035] A control method for a venting valve device with a bird-inspired wing feather flap structure as described in any of the preceding claims, comprising the steps of:

[0036] The initial state of the vent valve device is such that when the pressure difference is insufficient to separate the short and long bionic membrane valves of each bionic membrane valve unit, the short and long bionic membrane valves remain tightly fitted.

[0037] When the compressor is under high pressure and above a predetermined value and the vent valve does not receive a signal from the adjustable stator blade control subsystem, the short and long bionic membrane valves of the bionic membrane valve unit in the vent valve device will bend to one side under the action of pressure difference. When the short and long bionic membrane valves bend beyond a certain angle, the opposite short and long bionic membrane valves will separate from each other in the direction perpendicular to the vent valve, and an air passage for gas flow will be formed between the inlet and outlet. At this time, the vent valve will activate the adaptive function to balance the air pressure.

[0038] When the signal from the adjustable stator blade control subsystem is transmitted to the adjustable vent valve control subsystem, the manual opening mode will be activated. The piston of the vent valve will be driven by the hydraulic system, and the bionic membrane valve unit array will be opened sequentially along the direction of force. The corresponding short and long bionic membrane valves will separate horizontally to form a gap, allowing gas to pass freely between the exhaust port on the upper shell and the inlet port on the lower shell.

[0039] This invention provides a venting valve device with a bird-wing feather-inspired membrane flap structure, which can automatically open or close using pressure differential and is adaptive. The adjustable venting valve control subsystem (VBV) has a hysteresis characteristic, exhibiting a short-term high-pressure response before each opening. The venting valve can automatically open the bionic membrane flap first to balance the pressure differential in time, avoiding pressure concentration and preventing component aging and damage due to instantaneous high pressure, thus extending component lifespan. When the adjustable venting valve control subsystem (VBV) malfunctions and cannot open in time, the venting valve of this invention acts as a protective mechanism, automatically opening the bionic membrane flap to ensure the safety of the engine and its own structure, avoiding serious safety accidents. Flow rate is controlled by adjusting the spacing between different parts of the venting valve and the degree of separation between the long and short membrane flaps in the horizontal direction, improving efficiency and saving energy.

[0040] This invention, inspired by bird wing feather flap structure, designs an engine bleed valve device suitable for aircraft VBV systems that integrates automatic and manual opening. It has a simple structure, low cost, and is easy to promote. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the wing flap structure of birds.

[0042] Figure 2 This is an isometric view of a venting valve device with a bird-like wing feather flap structure according to an embodiment of the present invention.

[0043] Figure 3 This is an exploded structural diagram of a venting valve device with a bird-like wing flap structure according to an embodiment of the present invention.

[0044] Figure 4 This is a top view of a venting valve device with a bird-like wing feather flap structure according to an embodiment of the present invention.

[0045] Figure 5 This is a bottom view of a venting valve device with a bird-like wing feather flap structure according to an embodiment of the present invention.

[0046] Figure 6 This is an isometric side view of a biomimetic venting valve device with a bird wing flap structure according to an embodiment of the present invention, when the valve is closed.

[0047] Figure 7 This is a top view of the biomimetic venting valve of a bird wing flap structure according to an embodiment of the present invention, when the valve is closed.

[0048] Figure 8 This is an isometric side view of the opening of a biomimetic venting valve device with a bird wing feather flap structure, according to an embodiment of the present invention.

[0049] Figure 9 This is a cross-sectional view of the AA section of a venting valve device with a bird wing flap structure according to an embodiment of the present invention, when the valve is closed.

[0050] Figure 10 This is a BB cross-sectional view of a venting valve device with a bird wing flap structure according to an embodiment of the present invention, when the valve is closed.

[0051] Figure 11 This is a CC cross-sectional view of a biomimetic venting valve device with a bird wing flap structure according to an embodiment of the present invention, when the valve is opened.

[0052] Figure 12 This is a schematic diagram of the opening of the vent valve structure of a bird-inspired wing flap structure according to an embodiment of the present invention.

[0053] Figure 13 This is a DD cross-sectional view of a venting valve device with a bird wing flap structure according to an embodiment of the present invention. Detailed Implementation

[0054] This invention provides a venting valve device and control method with a bird-inspired wing feather flap structure. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0056] Organisms in nature provide innovative ideas and inspiration for solving engineering problems. For example, bird wing twigs have membranous flaps, such as... Figure 1 As shown, Figure 1This is a schematic diagram of the flap structure of a bird's wing feather. The flaps of the barbule overlap sequentially from the base to the tip of the barbule, forming a stable, elastic structure that blocks airflow. The wing feather flap structure functions similarly to a one-way valve. When airflow moves from the back to the belly of the wing feather, it is open to allow air to pass through; when airflow moves from the belly to the back, it is closed to trap air. Under pressure, the flap bends towards the back. If the pressure continues to increase beyond a threshold, the flap separates from the adjacent barbule, creating a gap that allows airflow to release pressure and prevents the wing feather shaft and barbules from breaking under overpressure. Based on the principles of biomimetic engineering, the bird's wing feather flap structure is introduced into the design of a novel biomimetic venting valve, providing the inventors of this application with a completely new approach to developing a venting valve device with unique mechanical properties.

[0057] Therefore, the venting valve device of the present invention, with a bird wing feather flap structure, is applicable to the Variable Bleed Valve System (VBV) of aircraft and belongs to the field of civil aviation. The venting valve device includes: upper and lower outer shells, front and rear outer shells, a piston, a right outer shell, a left biomimetic venting valve, a middle biomimetic venting valve, a right biomimetic venting valve, and a left outer shell. The upper and lower outer shells, front and rear outer shells, left and right outer shells are connected to the left and right outer shells. The biomimetic venting valve device consists of the left, right, and middle biomimetic venting valves connected by a piston and a connecting column. The piston can slide in a piston pin seat to control the opening and closing of the venting valve. The venting valve device of the present invention is inspired by the bird wing feather flap structure. A pressure difference exists on both sides of the venting valve, causing the flap structure to bend. When the pressure difference exceeds a critical value, the long and short flaps separate to form an air passage, promoting gas discharge and achieving the effect of protecting the aircraft engine. The venting valve device of the present invention has a simple structure, is stable and reliable, has low cost, and is easy to promote.

[0058] Example 1

[0059] Embodiment 1 of the present invention provides a venting valve device with a bird wing feather flap structure, comprising:

[0060] The housing 100 has an exhaust port 1-3 and an air inlet 1-2 respectively provided on its upper and lower end faces;

[0061] A left-end biomimetic vent valve 7 is disposed within the housing 100. One side of the left-end biomimetic vent valve 7 is inserted and connected to one side of the interior of the housing 100. The other side of the left-end biomimetic vent valve 7 is provided with a first piston cavity 71 and a first biomimetic flap unit 7-1, which is equipped with a bird wing flap structure that can be controlled to open by active driving force or by automatic airflow exceeding a critical pressure.Figure 12 As shown;

[0062] A central bionic venting valve 6 is located in the middle of the housing 100 and connected to the left-end bionic venting valve 7. One side of the central bionic venting valve 6 is provided with a first piston slider 62 movably connected to the first piston cavity 71, and a second bionic flap unit 6-1 with a bird wing flap structure that can be controlled to open by active driving force or by automatic airflow exceeding a critical pressure. Figure 12 As shown; on the other side of the central bionic venting valve 6, a second piston chamber 12 is provided, and a third bionic flap unit 6-2 with a bird wing flap structure that can be controlled to open by active driving force or by automatic airflow exceeding critical pressure is provided; in a preferred embodiment of the present invention, two central bionic venting valves 6 are arranged in sequence, but in other examples, the number of central bionic venting valves 6 can be increased as needed;

[0063] The right-end bionic vent valve 5 is located on the other side of the housing 100 and is connected to the middle bionic vent valve 6. The side of the right-end bionic vent valve 5 connected to the middle bionic vent valve 6 is provided with a second piston slider 51 that is movably connected to the second piston chamber 12, and a fourth bionic flap unit 5-3 with a bird wing flap structure that can be opened by active driving force or by automatic airflow exceeding the critical pressure.

[0064] Piston 3 is located at the other end of the housing 100 and is connected to the right-end bionic venting valve 5. It is used to receive external active driving force to actively drive and control the opening and closing of the left-end bionic venting valve 7, the middle bionic venting valve 6, and the right-end bionic venting valve 5.

[0065] Among them, such as Figure 3 As shown, the first piston cavity 71 consists of two parts, one end of which is respectively provided on the left side of the bionic vent valve 7. The first piston cavity 71 is a rectangular piston cavity. The first piston cavity 71 has a recessed first concave cavity 711 for accommodating the reciprocating movement of the first piston slider 62, which facilitates the insertion of the first piston slider 62 and its reciprocating movement inside.

[0066] The first biomimetic flap unit 7-1 includes a first connecting post base 72 and a first biomimetic flap long flap 73 alternately arranged between the two first piston cavities 71. The first biomimetic flap long flap 73 adopts a bird wing feather flap structure.

[0067] In a preferred embodiment of the present invention, there are two first piston sliders 62, which are respectively disposed at both ends on one side of the central bionic vent valve 6. A first locking block 621 is provided at the end of the first piston slider 62, which can act as a piston, ensure the reliable connection between the piston slider and the piston cavity, and prevent the first piston slider 62 from falling out of the first piston cavity 71.

[0068] The second biomimetic flap unit 6-1 includes: a first connecting post slide cover 63 disposed between two first piston sliders 62 and inserted into and connected to the first connecting post base 72, and a first biomimetic flap short flap 64; the first biomimetic flap short flap 64 adopts a bird wing feather flap structure.

[0069] The venting valve device described in this embodiment of the invention features biomimetic long and short flaps inspired by the structure of wing flaps in birds. When a pressure difference exists across the venting valve device, the biomimetic long and short flaps bend. When the pressure difference exceeds a critical value, the biomimetic long and short flaps separate to form an air passage, facilitating gas discharge and thus protecting the aircraft engine. 。

[0070] Furthermore, the second piston cavity 12 consists of two parts, each located at one end of the other side of the central bionic vent valve 6. The second piston cavity 12 is a rectangular piston cavity, and a second concave cavity 67 is provided within the second piston cavity 12.

[0071] like Figure 3 and Figure 12 As shown, the third bionic membrane flap unit 6-2 includes: a second connecting post base 65 and a second bionic membrane flap long flap 66 alternately arranged between the two second piston cavities 12, wherein the second bionic membrane flap long flap 66 adopts a bird wing feather membrane flap structure.

[0072] The venting valve device with a bird-like wing feather flap structure described in this invention, such as... Figure 3 and Figure 12 As shown, there are two second piston sliders 51 of the right-end bionic vent valve 5, which are respectively set at both ends of one side of the right-end bionic vent valve 5, and a second locking block 511 is provided at the end of the second piston slider 51; it can act as a piston, and can ensure the reliable connection between the piston slider and the piston cavity, and can also prevent the second piston slider 51 from falling out of the second piston cavity 12.

[0073] like Figure 3 and Figure 12As shown, the fourth bionic membrane flap unit 5-3 includes: a second connecting post slide cover disposed between two second piston sliders 51 and inserted into and connected to the second connecting post base 65, and a second bionic membrane flap short flap; the second bionic membrane flap short flap adopts a bird wing feather membrane flap structure.

[0074] In this embodiment of the invention, the venting valve device with the bird-like wing flap structure is provided in which one end of the piston 3 is configured to be flush with the right-end bionic venting valve 5, and the other end of the piston 3 is provided with a piston rod 31 for receiving external active driving force, and the piston rod 31 protrudes out of the outer side of the housing 100.

[0075] Furthermore, the venting valve device with a bird-like wing feather flap structure described in the embodiments of the present invention, such as... Figure 2 and Figure 3 As shown, the housing 100 includes:

[0076] An upper outer shell 1 is provided on the upper end face of the housing 100, and the air outlet 1-3 is provided on the opening of the upper outer shell 1;

[0077] The lower outer shell 1-1 is provided on the lower end face of the housing 100, and the air inlet 1-2 is provided on the opening of the lower outer shell;

[0078] The front outer shell 2 is disposed on the front end face of the housing 100.

[0079] The rear outer casing 2-1 is located on the rear end face of the housing 100.

[0080] The left end outer shell 8 is located on the left end face of the housing 100.

[0081] And a right-end outer shell 4 is provided on the right end face of the housing 100. The left-end outer shell 8 has a connecting post 81 inside which is inserted and connected to the left-end bionic venting valve 7; the left-end outer shell 8 is fixedly connected to the left-end bionic venting valve 7 through the connecting post 81, so that the connection is more reliable and convenient.

[0082] Furthermore, a piston guide sleeve 41 is provided on the outer side of the right end housing 4 to guide the piston rod 31. The piston guide sleeve 41 can further increase the direction of movement of the piston rod 31 and extend the service life of the piston rod 31.

[0083] In a preferred embodiment of the invention, the stiffness of the short bionic membrane flap is less than that of the long bionic membrane flap; the stiffness of the first and second short bionic membrane flaps is less than that of the first and second long bionic membrane flaps. This is because the short bionic membrane flap has a smaller pressure-receiving area, while the long bionic membrane flap has a larger pressure-receiving area. This ensures that when both the short and long bionic membrane flaps are simultaneously under high pressure (above a predetermined value) in the compressor, they will bend to one side under the pressure difference, automatically opening the bionic membrane flap and ensuring the safety of the engine and its own structure, thus preventing serious safety accidents.

[0084] In this embodiment of the invention, preferably, the left-end bionic venting valve, the middle bionic venting valve 6, and the right-end bionic venting valve 5 are made of aerospace aluminum alloy; the upper shell, the lower shell, the front shell, the rear shell, the left shell, and the right shell are made of aerospace aluminum alloy; and the piston and piston rod are made of cast iron.

[0085] like Figure 2 and Figure 3 As shown in the figure, this embodiment of the invention provides a venting valve device with a bird-like wing flap structure. The upper outer shell 1, lower outer shell 1-1, front outer shell 2, and rear outer shell 2-1 are fixedly connected. The upper outer shell has an air inlet 1-2 and an exhaust outlet. The upper outer shell 1, lower outer shell 1-1, front outer shell 2, and rear outer shell 2-1 are connected to the right outer shell 4 of the piston end. The upper outer shell 1, lower outer shell 1-1, front outer shell 2, and rear outer shell 2-1 are connected to the left outer shell 8. The upper outer shell 1, lower outer shell 1-1, front outer shell 2, rear outer shell 2-1, piston 3, right outer shell 4, and left outer shell 8 constitute a biomimetic venting valve housing. In this embodiment of the invention, preferably, the outer shell of the biomimetic vent valve is a cuboid structure with a length L1 of 200mm, a width L2 of 150mm, and a height H1 of 30mm; wherein, the upper outer shell 1 and the lower outer shell 1-1 have rectangular inlet and outlet ports, preferably, the rectangular inlet and outlet ports have a length L4 of 110mm, a width L3 of 100mm, and rounded corners with a radius d1 of 10mm; the rounded corners serve two purposes: 1) to improve the uniformity of the vented airflow, and 2) to avoid stress concentration at the four corners of the outlet ports 1-3, thereby improving the service life of the parts.

[0086] The upper outer shell 1, lower outer shell 1-1, front outer shell 2, rear outer shell 2-1, left outer shell 8, and right outer shell 4 are made of aerospace-grade aluminum alloy. The aluminum alloy material can be, but is not limited to, 7050-T7451, 7050-7351, 7050-T7452, 7050-T6, or 7090-T6. Air inlets 1-2 are formed on the upper outer shell 1 and lower outer shell 1-1 by stamping. The shells are fixed together by threaded connection or welding. A hydraulic linkage sleeve is located at the center of the right outer shell 4.

[0087] like Figure 3 and Figure 5 As shown, the left-end bionic venting valve 7 and the left-end outer shell 8 are connected. Preferably, the connecting post 81 on the left-end outer shell 8 is connected to the left-end bionic venting valve 7. In this embodiment of the invention, preferably, the length L5 of the connecting post 81 is 30mm, the length L7 of the venting valve is 110mm, the width L8 is 150mm, and the height H2 is 20mm. In this embodiment of the invention, preferably, the bionic venting valve is made of aerospace aluminum alloy material, and the aluminum alloy material model can be, but is not limited to, 7050-T7451, 7050-7351, 7050-T7452, 7050-T6, and 7090-T6. Figure 3 and Figure 5 As shown, the right-end bionic venting valve 5 and piston 3 are fixedly connected. The piston can slide L6 60mm inside the bionic venting valve housing. The piston 3 and piston rod (hydraulic connecting rod) are made of cast iron material. Cast iron models include but are not limited to HT100, HT150, HT200, HT250, HT300, and HT350.

[0088] Among them, such as Figure 3 , Figure 5 and Figure 8 As shown, the left-end bionic vent valve 7 has a first piston cavity 71 at each end on one side (right side) for the first piston slider 62 to move. A first connecting post base 72 and a first bionic membrane flap long flap 73 are alternately arranged between the first piston cavities 71 at both ends. The first piston cavity 71 has a rectangular structure.

[0089] The central bionic venting valve 6 has two ends on one side (left side) with first piston sliders 62 that cooperate with the second piston chamber 12 for piston connection. Between the two ends of the first piston sliders 62, there is a first connecting post cover 63 that is inserted and connected to the first connecting post base 72, and a first bionic membrane flap short flap 64. The other side (right side) of the central bionic venting valve 6 has two ends with second piston chambers 12, and a second connecting post base 65 and a second bionic membrane flap long flap 66 are alternately arranged between the two ends of the second piston chambers 12. Preferably, in this embodiment of the invention, there are two central bionic venting valves 6, and the two central bionic venting valves 6 are connected sequentially.

[0090] like Figures 2 to 13 As shown, the right-end bionic venting valve 5 has two second piston sliders 51 at both ends on one side (inner side), and a second connecting post slide cover 15 and a second bionic membrane flap short flap 52 are arranged between the two ends of the second piston sliders 51; the left-end bionic venting valve 7, the two middle bionic venting valves 6, and the right-end bionic venting valve 5 are connected in sequence by pistons and connecting posts to form a bionic venting valve. The bionic venting valve can slide in the horizontal direction (X-axis), and the pistons and connecting posts provide sufficient flexibility to control the opening and closing of the venting valve.

[0091] In this embodiment of the invention, the biomimetic membrane flap long and short flaps adopt the membrane flap structure that imitates the wing feathers of birds. The biomimetic membrane flap long and short flaps are interlaced and partially overlapped to form a biomimetic membrane flap structure. This structure can automatically open or close when there is a certain pressure difference on both sides of the membrane flap. The size and number of biomimetic membrane flaps can be adjusted according to the exhaust performance requirements of different engine models.

[0092] Furthermore, in embodiments of the present invention, such as Figures 3 to 9 As shown, the length L9 of the first piston chamber 71 for piston-slider movement, arranged before and after the left-end biomimetic vent valve 7, is 30mm. Figure 7 As shown, the first piston slider 62 can slide 20mm within it. In a preferred embodiment of the invention, the first piston cavity 71 is made of die-cast aluminum alloy, and three first connecting post bases 72 and three long L-shaped supports are alternately arranged between the two first piston cavities. 10 20mm, width L 12 The first bionic membrane flap 73 has a thickness of 32mm and a length of D2 of 2mm. The upper end of the first connecting column base 72 is set in a convex shape and is made by milling, and is welded to one side of the left bionic vent valve 7.

[0093] Furthermore, such as Figures 2 to 11 As shown, three first connecting post slide covers 63 are provided between the first piston sliders 62 fixedly connected to the front and rear parts of one side of the central bionic vent valve 6, and the distance L between every two first connecting post slide covers 63 is... 13 32mm and 3 long L 11 15mm, width L 12 The first biomimetic membrane flap 64 has a diameter of 32mm and a thickness of D1 2mm. Three second connecting column bases 65 and three long L-shaped sections are alternately arranged between the front and rear portions of the second piston chambers 12 on the other side (right side) of the central biomimetic vent valve 6. 10 It is 32mm long and L wide. 12 The length of the second bionic membrane flap is 66 mm, with a height of 20 mm and a height of D2 of 2 mm.

[0094] In one embodiment, the second piston slider 51, which is fixedly connected to the front and rear ends of the right-side biomimetic vent valve 5, is provided with three second connecting post slide covers 15 and three long L-shaped slide covers. 11 It is 15mm long and L wide. 12 The second biomimetic membrane flap 52 has a diameter of 32mm and a thickness D1 of 2mm. A groove is provided at the lower part of the second connecting post sliding cover 15. This groove is milled and welded to the right-end biomimetic venting valve 5. In this embodiment, when the biomimetic venting valve is fully open, the distance L between the right-end 5, the middle biomimetic venting valve 6, and the left-end biomimetic venting valve 7 is... 13 The thickness D3 of the bottom plate of the bionic venting valve at the right end 5, the middle bionic venting valve 6, and the left end 7 is 60mm. Two middle bionic venting valves 6 are set in the horizontal direction. The bionic venting valve has a total of 9 bionic membrane flap units, each of which consists of a long bionic membrane flap and a short bionic membrane flap. In this embodiment, preferably, the long and short bionic membrane flaps are made of elastic rubber material. According to the critical pressure required for the opening of the bionic venting valve, the available rubber materials include, but are not limited to, styrene-butadiene rubber, epichlorohydrin rubber, polyisoprene rubber, and hydrogenated nitrile rubber. The elasticity of the rubber material used for the short bionic membrane flap should be less than that of the long bionic membrane flap to ensure the airtight performance of the bionic venting valve when it is not opened. The long and short bionic membrane flaps are made by 3D printing and fixed to the bionic venting valve by adhesive.

[0095] In this invention, two central bionic venting valves 6 are arranged in the middle of the device along the X-axis. The two central bionic venting valves 6 are connected by a piston structure formed by a piston cavity and a piston slider, and a sliding connection structure formed by a first connecting column slide cover 63 and a second connecting column base 65. A left-end bionic venting valve 7 and a right-end bionic venting valve 5 are respectively placed on both sides of the two centrally connected bionic venting valves 6. There are 3 bionic membrane flap units in each row (Y-axis direction), and 3 bionic membrane flaps are arranged in each column (X-axis direction) of this invention. There are a total of 3x3 bionic venting valves, that is, 9 bionic membrane flap units.

[0096] Piston 3 is connected to the right-end bionic venting valve 5. The piston rod 31 of piston 3 is connected to the hydraulic system via the right-end housing 4, driving the bionic venting valve to open or close. As piston 3 is driven, the three rows of bionic membrane flap basic units in the middle open sequentially, realizing the opening or closing operation of the venting valve. Simultaneously, bionic membrane flaps in different rows open sequentially. Furthermore, flow rate can be controlled by selectively opening only certain membrane flaps.

[0097] The invention principle and working process are as follows:

[0098] This invention mimics the flap structure in bird wing feathers, creating a venting valve device with a bird-feather flap structure. The biomimetic flap structure allows the venting valve to adaptively open or close, solving the hysteresis problem of the adjustable venting valve control subsystem (VBV). The biomimetic flap structure consists of opposing biomimetic short and long flaps. The short flaps have less stiffness than the long flaps, ensuring a tight fit when the pressure difference is insufficient to separate the short and long flaps, thus maintaining good airtightness of the overall device. In the horizontal direction (X-axis), the piston drives the biomimetic venting valve to slide relative to each other, increasing the distance between the various parts of the valve. The short and long flaps separate horizontally, forming an air passage in the middle for free gas flow, enabling active control of the venting valve's opening and closing. Furthermore, the adaptive opening function of this venting valve does not require an additional control system, avoiding venting valve malfunctions caused by poor lubrication of the mechanical structure.

[0099] The air release valve device with a bird wing feather flap structure according to an embodiment of the present invention operates as follows:

[0100] When the compressor is under high pressure and the vent valve does not receive a signal from the VSV system, the bionic flap unit in the vent valve device with the bird wing flap structure of this invention will bend to one side under the action of pressure difference. When the bending exceeds a certain angle, the opposing short and long bionic flaps will separate from each other in a direction perpendicular to the vent valve, forming an air passage between the inlet 1-2 and the outlet. At this time, the vent valve activates its adaptive function to balance the air pressure. Because the stiffness of the lower flexible plate is less than that of the upper flexible plate, the lower flexible plate will adhere to the upper flexible plate during bending until a gap is created between the two plates, thus maintaining good airtightness.

[0101] When the signal from the adjustable stator vane control subsystem (VSV) is transmitted to the adjustable vent valve control subsystem (VBV), the manual opening mode will be activated. The piston 3 of the vent valve will be driven by the hydraulic system. The diaphragm array will open sequentially along the direction of force. The diaphragm will separate in the horizontal direction to form a gap. Gas can freely pass between the exhaust port on the upper housing and the inlet ports 1-2 on the lower housing.

[0102] When the adjustable vent valve control subsystem (VBV) malfunctions and the vent valve cannot open normally, the adaptive nature of the vent valve device with the bird wing flap structure involved in this invention can be utilized to bend the bionic flap under the drive of pressure difference to form a gap, allowing gas to flow normally and ensuring the safety of the machine.

[0103] As can be seen from the above, the present invention provides a venting valve device with a bird-like wing flap structure, which can automatically open or close using pressure differential and has self-adaptability. The adjustable venting valve control subsystem (VBV) has hysteresis, with a short-term high-pressure response before each opening. The venting valve can automatically open the bionic flap first to balance the pressure differential in time, avoid pressure concentration, prevent damage to components due to instantaneous high pressure aging, and extend component life. When the adjustable venting valve control subsystem (VBV) malfunctions and cannot open in time, the venting valve of the present invention, as a protection mechanism, can automatically open the bionic flap to ensure the safety of the engine and its own structure, avoiding serious safety accidents. The flow rate is controlled by adjusting the intervals between different parts of the venting valve and the degree of separation of the long and short flaps in the horizontal direction, improving efficiency and saving energy.

[0104] This invention, based on a bird wing feather flap structure, designs an engine venting valve device suitable for aircraft VBV systems that integrates automatic and manual opening. It is simple in structure, low in cost, and easy to promote.

[0105] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A venting valve device with a bird wing feather flap-like structure, characterized in that, include: The housing has an exhaust port and an air inlet on its upper and lower end faces, respectively. A left-end bionic venting valve is disposed inside the housing. One side of the left-end bionic venting valve is inserted and connected to one side of the housing. The other side of the left-end bionic venting valve is provided with a first piston cavity and a first bionic flap unit with a bird wing flap structure that can be opened by active driving force or by automatic airflow exceeding critical pressure. A central bionic venting valve is located in the middle of the housing and connected to the left-end bionic venting valve. One side of the central bionic venting valve is provided with a first piston slider that is movably connected to the first piston chamber, and a second bionic flap unit with a bird wing feather flap structure that can be controlled to open by active driving force or by automatic airflow exceeding a critical pressure. The other side of the central bionic venting valve is provided with a second piston chamber and a third bionic flap unit with a bird wing feather flap structure that can be controlled to open by active driving force or by automatic airflow exceeding a critical pressure. The right-end bionic vent valve is located on the other side of the housing and is connected to the middle bionic vent valve. The side of the right-end bionic vent valve connected to the middle bionic vent valve is provided with a second piston slider that is movably connected to the second piston cavity, and a fourth bionic flap unit with a bird wing flap structure that can be opened by active driving force or by automatic airflow exceeding the critical pressure. A piston, located at the other end of the housing, is connected to the left-end bionic venting valve. It is used to receive external active driving force to actively drive and control the opening and closing of the left-end bionic venting valve, the middle bionic venting valve, and the right-end bionic venting valve.

2. The venting valve device with a bird-like wing feather flap structure according to claim 1, characterized in that, The first piston cavity consists of two parts, each located at one end of the left bionic vent valve. The first piston cavity is a rectangular piston cavity, and a first concave cavity is provided in the first piston cavity to accommodate the reciprocating movement of the first piston slider.

3. The venting valve device with a bird-like wing feather flap structure according to claim 1, characterized in that, The first biomimetic flap unit includes: a first connecting post base and a first biomimetic flap long flap alternately arranged between the two first piston cavities, wherein the first biomimetic flap long flap adopts a bird wing feather flap structure.

4. The venting valve device with a bird-like wing feather flap structure according to claim 3, characterized in that, There are two first piston sliders, which are respectively set at both ends of one side of the bionic venting valve in the middle, and a first locking block is provided at the end of the first piston slider. The second biomimetic flap unit includes: a first connecting post slide cover disposed between two first piston sliders and inserted into and connected to the first connecting post base, and a first biomimetic flap short flap; the first biomimetic flap short flap adopts a bird wing feather flap structure. The second piston cavity consists of two parts, one on each side of the other end of the central bionic vent valve. The second piston cavity is a rectangular piston cavity, and a second concave cavity is provided within the second piston cavity. The third biomimetic flap unit includes: a second connecting post base and a second biomimetic flap long flap alternately arranged between the two second piston cavities, wherein the second biomimetic flap long flap adopts a bird wing feather flap structure.

5. The venting valve device with a bird-like wing feather flap structure according to claim 4, characterized in that, The second piston slider of the right-end bionic venting valve is two, respectively set at both ends of one side of the right-end bionic venting valve, and a second locking block is provided at the end of the second piston slider; The fourth biomimetic flap unit includes: a second connecting post slide cover that is inserted and connected to the second connecting post base and disposed between the two second piston sliders; the second biomimetic flap short flap adopts a bird wing feather flap structure.

6. The venting valve device with a bird-like wing feather flap structure according to claim 5, characterized in that, One end of the piston is configured to be flush with the left-end bionic vent valve, and the other end of the piston is provided with a piston rod for receiving external active driving force, and the piston rod protrudes from the outside of the housing.

7. The venting valve device with a bird-like wing feather flap structure according to claim 6, characterized in that, The housing includes: An upper outer shell is provided on the upper end face of the housing, and the exhaust port is provided on the opening of the upper outer shell; A lower outer shell is provided on the lower end face of the housing, and the air inlet is provided on the opening of the lower outer shell; The front outer shell is located on the front end face of the housing. The rear outer casing is located on the rear end face of the housing. The left end shell is located on the left end face of the housing. And the right end shell located on the right end face of the housing.

8. The venting valve device with a bird-like wing feather flap structure according to claim 7, characterized in that, The inner side of the left end shell is provided with a connecting post that is inserted and connected to the left end bionic venting valve. A piston guide sleeve is provided on the outer side of the right end of the outer casing to guide the piston rod.

9. The venting valve device with a bird-like wing feather flap structure according to claim 7, characterized in that, The stiffness of the short bionic membrane flap is less than that of the long bionic membrane flap. The left-end bionic venting valve, the middle bionic venting valve, and the right-end bionic venting valve are made of aerospace aluminum alloy material. The upper shell, the lower shell, the front shell, the rear shell, the left shell, and the right shell are made of aerospace aluminum alloy. The piston and piston rod are made of cast iron.

10. A control method for a venting valve device with a bird-like wing feather flap structure as described in any one of claims 1-9, characterized in that, Including the following steps: The initial state of the vent valve device is such that when the pressure difference is insufficient to separate the short and long bionic membrane valves of each bionic membrane valve unit, the short and long bionic membrane valves remain tightly fitted. When the compressor is under high pressure and above a predetermined value and the vent valve does not receive a signal from the adjustable stator blade control subsystem, the short and long bionic membrane valves of the bionic membrane valve unit in the vent valve device will bend to one side under the action of pressure difference. When the short and long bionic membrane valves bend beyond a certain angle, the opposite short and long bionic membrane valves will separate from each other in the direction perpendicular to the vent valve, and an air passage for gas flow will be formed between the inlet and outlet. At this time, the vent valve will activate the adaptive function to balance the air pressure. When the signal from the adjustable stator blade control subsystem is transmitted to the adjustable vent valve control subsystem, the manual opening mode will be activated. The piston of the vent valve will be driven by the hydraulic system, and the bionic membrane valve unit array will be opened sequentially along the direction of force. The corresponding short and long bionic membrane valves will separate horizontally to form a gap, allowing gas to pass freely between the exhaust port on the upper shell and the inlet port on the lower shell.

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