Wide temperature range stable rudder surface flutter suppression variable damper valve for aviation

Abstract

The utility model belongs to aerospace technology field, and wide temperature range stable rudder surface flutter suppression variable resistance valve for aviation belongs to aerospace technology field. Hexagonal thin nut and plug are installed at both ends of valve body respectively, and the hexagonal thin nut is used for threaded installation adjusting rod, and the plug is used for installing spring, and adjusting rod and spring jointly act on valve core from both ends, so that valve core is in the middle position, feedback mechanism adopts pressure sensor, is installed at oil port of valve body, is used for measuring pressure change when fluid passes through variable resistance valve. The variable resistance valve can adjust the damping force in real time according to different flight conditions and rudder surface flutter state. Through feedback mechanism, damping force and valve core position are monitored in real time, and combined with the flight parameters provided by the flight control system, the control mechanism can accurately adjust the position of the valve core, so as to change the size of the throttle, realize the continuous and adaptive adjustment of the damping force. Compared with the traditional fixed damping technology, the best damping effect can be provided under various flight conditions, and the rudder surface flutter is effectively inhibited.

Description

Technical Field

[0001] This invention belongs to the field of aerospace technology, specifically relating to a variable damping valve for suppressing flutter on aerospace control surfaces with a wide temperature range. Background Technology

[0002] Control surface flutter is a common problem in the aerospace field, which can lead to structural damage or even loss of control of aircraft. Existing damping valves are unstable in extreme temperature environments and lack adaptive adjustment capabilities, making it difficult to meet the flutter suppression requirements under complex operating conditions. Therefore, there is an urgent need for a variable damping valve that can maintain stable performance under extreme temperatures, possesses nonlinear damping characteristics, and can adaptively adjust. Summary of the Invention

[0003] The main objective of this invention is to provide a variable damping valve that is suitable for a wide temperature range and has stable performance. By optimizing the structural design, material selection, and control system, it can ensure that the performance degradation of the variable damping valve does not exceed 5% under extreme temperature environments. The variable damping valve has a nonlinear damping characteristic structure designed in the valve core, which can realize nonlinear adjustment of the damping force to adapt to the changes in control surface flutter under different flight conditions, thereby improving the stability and safety of the aircraft control surface and overcoming the limitations of existing control surface flutter suppression technologies.

[0004] The technical solution adopted in this invention is: An aviation-grade wide-temperature-range stabilized control surface flutter suppression variable damping valve includes an adjusting rod, a hexagonal thin nut, a valve body, a valve core, a plug, a spring, and a feedback mechanism. The valve core is installed in the valve body, and a hexagonal thin nut and a plug are respectively installed at both ends of the valve body. The hexagonal thin nut is used to thread the adjusting rod, and the plug is used to install the spring. The adjusting rod and the spring act together on the valve core from both ends, keeping the valve core in the neutral position. The feedback mechanism uses a pressure sensor installed at the oil port of the valve body to measure the pressure change of fluid passing through the variable damping valve.

[0005] Compared with the prior art, the present invention has the following advantages: 1. Stable performance The optimized structural design, material selection, and control system of this variable damping valve result in a performance degradation of no more than 5% under extreme temperature conditions, which is significantly better than existing technologies.

[0006] 2. Simple structure and high reliability This variable damping valve features a simple design, is easy to manufacture and maintain, and has high reliability.

[0007] 3. Wide range of applications This variable damping valve can be widely used in aerospace, automotive industry and other fields, providing an efficient solution for vibration control in complex environments.

[0008] 4. Adaptive adjustment of damping force This variable damping valve can adjust the damping force in real time according to different flight conditions and control surface flutter. Through a feedback mechanism that monitors the damping force and valve spool position in real time, and combined with flight parameters provided by the flight control system, the control mechanism can precisely adjust the valve spool position, thereby changing the throttle orifice size and achieving continuous, adaptive adjustment of the damping force. Compared with traditional fixed damping technology, it can provide optimal damping performance under various flight conditions, effectively suppressing control surface flutter.

[0009] 5. Improve flight safety and stability.

[0010] Because variable damping valves can effectively suppress control surface flutter in real time, they avoid problems such as control surface structural damage and flight loss of control caused by flutter, greatly improving the flight safety and stability of the aircraft. Whether in high-speed flight, complex weather conditions, or violent maneuvering, the aircraft's control surfaces can maintain a stable working state, ensuring that the aircraft flies along the predetermined route and attitude.

[0011] 6. Reduce system complexity and cost Compared to the complex sensor, controller, and actuator systems in active control technologies, this variable damping valve employs a relatively simple feedback mechanism, achieving efficient damping regulation while reducing system complexity and cost. Furthermore, since it eliminates the need for additional complex active control algorithms and substantial computational resources, it reduces the probability of system failure and improves reliability.

[0012] 7. Reduce aircraft weight Unlike traditional structural design methods that suppress flutter by increasing structural stiffness, this variable damping valve effectively suppresses control surface flutter without significantly increasing the aircraft's weight. Manufactured using lightweight materials, this valve features a compact structure and requires little installation space. Unlike traditional designs that rely on adding stiffeners or thickening the skin to drastically increase control surface weight, it improves the aircraft's fuel efficiency and payload capacity. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the invention; The components are: 1. Adjusting rod; 2. Hexagonal thin nut; 3. Valve body; 4. Sealing ring one; 5. Sealing ring two; 6. Sealing ring three; 7. Valve core; 8. Sealing ring four; 9. Copper gasket; 10. Plug; 11. Spring. Detailed Implementation

[0014] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0015] like Figure 1 , Figure 2 As shown, this invention provides a wide-temperature-range stabilized control surface flutter suppression variable damping valve for aviation, including an adjusting rod 1, a hexagonal thin nut 2, a valve body 3, a valve core 7, a plug 10, a spring 11, and a feedback mechanism. The valve body 3 serves as the outer shell of the entire variable damping valve, providing installation space and protection for internal components, and also acting as a channel for fluid (usually hydraulic oil) flow. The valve core 7 is installed inside the valve body 3, and the damping force is adjusted by changing the size of the throttling orifice between the valve core 7 and the valve body 3.

[0016] The valve body 3 is equipped with a hexagonal thin nut 2 and a plug 10 at both ends. The hexagonal thin nut 2 is used to thread the adjusting rod 1, and the plug 10 is used to install the spring 11. The adjusting rod 1 and the spring 11 act together on the valve core 7 from both ends, so that the valve core 7 is in the neutral position. The feedback mechanism adopts a pressure sensor, which is installed at the oil port of the valve body 3 to measure the pressure change when the fluid passes through the variable damping valve. By analyzing the signal of the pressure sensor, the actual magnitude of the damping force can be obtained to analyze the changes inside the system. The working status of the variable damping valve can be monitored in real time to achieve precise control.

[0017] The valve body 3 is made of high-strength titanium alloy material with minimal temperature-induced deformation. It is precision cast and machined into a conical shape for easy installation in the valve block. The valve body 3 provides a stable structural foundation for the entire variable damping valve, ensuring its reliability and durability during aircraft operation.

[0018] The valve body 3 is made of titanium alloy, and the sealing rings 4, 5, 6, and 8 are made of fluororubber to ensure stable material performance under extreme temperature conditions.

[0019] The valve core 7 is made of high-strength titanium alloy.

[0020] The valve core 7 has multiple triangular throttling grooves on its surface, which are distributed along the circumference of the valve core 7. When the valve core 7 moves axially within the valve body 3, different throttling grooves align with the oil ports on the valve body 3, thereby changing the throttling area through which the fluid passes and realizing continuous adjustment of the damping force.

[0021] Adjusting rod 1 is made of stainless steel.

[0022] Hexagonal thin nut 2: It is threaded to the adjusting rod 1 and is used for the relative position of the solid valve body 3 and the valve core 7.

[0023] Plug 10: Made of stainless steel, installed inside valve body 3. Valve core 7 acts on the end of plug 10, and spring 11 acts on the hollow part inside plug 10. Plug 10 serves as a fixed end so that adjusting rod 1 and spring 11 can adjust the position of valve core 7.

[0024] Multiple annular grooves are provided on the outer surface of the valve body 3, which are used to install sealing ring 1 4, sealing ring 2 5, sealing ring 3 6 and sealing ring 4 8 respectively.

[0025] Sealing ring 1 (4), sealing ring 2 (5), sealing ring 3 (6), and sealing ring 4 (8) are used to prevent leakage of hydraulic oil between valve body 3 and valve block.

[0026] The oil port of the valve body 3 is connected to the aircraft's control surface drive system via a hydraulic pipeline.

[0027] A copper gasket 9 is provided between the valve body 3 and the plug 10.

[0028] The variable damping valve is connected to the aircraft's control surface drive system via hydraulic lines. Installed in a critical position within the hydraulic circuit of the control surface drive system, the valve ensures that fluid must pass through it during the movement of the control surfaces. This allows the valve to adjust the damping force of the fluid in real time, thereby influencing the motion characteristics of the control surfaces and suppressing control surface flutter. Simultaneously, the variable damping valve is also connected to the aircraft's flight control system via electrical wiring, receiving flight parameter signals such as airspeed, altitude, and attitude from the flight control system to adjust the damping force according to different flight conditions.

[0029] I. Manufacturing and Assembly of Valve Body 3 and Valve Core 7 Valve body 3 manufacturing: Valve body 3 is formed using a precision casting process to ensure the dimensional accuracy and surface finish of the internal flow channels. After casting, valve body 3 undergoes machining, including boring and milling, to ensure the dimensional accuracy and cylindricity of the valve core mounting hole, as well as the positional and shape accuracy of the oil port. A threaded connection structure is machined at the oil port of valve body 3 for connection to hydraulic lines.

[0030] Valve core 7 manufacturing: Valve core 7 is made of high-strength titanium alloy and manufactured using CNC turning and milling processes. On the surface of valve core 7, according to design requirements, multiple evenly distributed triangular throttling grooves are precisely machined in the circumferential direction for small flow rate, high damping regulation, to ensure uniform fluid flow around valve core 7. After machining, valve core 7 undergoes surface hardening treatment to improve its hardness and wear resistance.

[0031] Assembly process: Install the machined valve core 7 into the valve body 3, ensuring that the valve core 7 can move freely axially within the valve body 3. Add a spring 11, a copper washer 9, and a plug 10 to one end of the valve core 7, and an adjusting rod 1 to the other end, then connect a hexagonal thin nut 2 to it. Adjust the valve core 7 to the middle position of the valve body 3 by tightening the hexagonal thin nut 2. Finally, add a sealing ring to the valve body 3 so that it can be connected to the valve block.

[0032] II. Installation and Data Processing of the Feedback Mechanism The pressure sensor is a high-precision sensor suitable for the working pressure range of the hydraulic system. It is installed in a specially machined mounting hole at port 3 of the valve body, and a sealing gasket ensures a good seal to prevent hydraulic oil leakage. The pressure sensor converts the measured pressure signal into an electrical signal and transmits it to the microprocessor. The microprocessor processes this signal and calculates the actual damping force based on fluid mechanics principles and the structural parameters of the variable damping valve.

[0033] III. Connection and Debugging with Aircraft Systems Hydraulic pipeline connection High-pressure hydraulic lines compatible with the aircraft's hydraulic system are selected to connect the variable damping valve's port to the hydraulic circuit of the control surface drive system. During connection, ensure the lines are securely installed to prevent loosening and leakage. Simultaneously, the hydraulic lines are strategically arranged to avoid interference with other aircraft components.

[0034] System debugging During the ground testing phase of the aircraft, the variable damping valve and the aircraft system underwent joint debugging. First, different flight conditions, such as varying speeds, altitudes, and attitudes, were simulated using the flight control system, sending corresponding flight parameter signals to the control mechanism of the variable damping valve. Simultaneously, vibration testing equipment was used to simulate control surface flutter, monitoring the damping force adjustment effect of the variable damping valve. Based on the debugging results, the control algorithm and parameters of the control mechanism were optimized to ensure that the variable damping valve could accurately and effectively adjust the damping force and suppress control surface flutter under various simulated flight conditions. After multiple debugging sessions and achieving the expected results, the variable damping valve was officially applied to the actual flight of the aircraft. During actual flight, the operating status of the variable damping valve and its effect on suppressing control surface flutter were continuously monitored, and the system was further optimized and improved based on actual conditions.

[0035] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A variable damping valve for suppressing flutter on aircraft control surfaces with a wide temperature range, characterized in that: The valve body includes an adjusting rod (1), a hexagonal thin nut (2), a valve body (3), a valve core (7), a plug (10), a spring (11), and a feedback mechanism. The valve core (7) is installed inside the valve body (3). The valve body (3) has a hexagonal thin nut (2) and a plug (10) installed at both ends. The hexagonal thin nut (2) is used to thread the adjusting rod (1), and the plug (10) is used to install the spring (11). The adjusting rod (1) and the spring (11) act together on the valve core (7) from both ends, so that the valve core (7) is in the neutral position. The feedback mechanism uses a pressure sensor, which is installed at the oil port of the valve body (3) to measure the pressure change when the fluid passes through the variable damping valve. The variable damping valve passes through the fluid... The hydraulic line is connected to the control surface drive system of the aircraft. In the hydraulic circuit of the control surface drive system, the variable damping valve is installed in a key position so that the fluid must pass through the variable damping valve during the process of driving the control surface. The variable damping valve adjusts the damping force of the fluid in real time. The variable damping valve is also connected to the flight control system of the aircraft through electrical lines to receive the flight parameter signals sent by the flight control system so as to adjust the damping force according to different flight conditions. The valve core (7) has multiple triangular throttling grooves on its surface, which are distributed along the circumference of the valve core (7). When the valve core (7) moves axially in the valve body (3), different throttling grooves are aligned with the oil port on the valve body (3), thereby changing the throttling area through which the fluid passes.

2. The aviation wide-temperature-range stable control surface flutter suppression variable damping valve according to claim 1, characterized in that: The valve body (3) is made of titanium alloy and is conical.

3. The aviation wide-temperature-range stable control surface flutter suppression variable damping valve according to claim 1, characterized in that: The valve core (7) is made of titanium alloy.

4. The aviation wide-temperature-range stable control surface flutter suppression variable damping valve according to claim 1, characterized in that: Multiple annular grooves are provided on the outer surface of the valve body (3) for installing sealing ring one (4), sealing ring two (5), sealing ring three (6) and sealing ring four (8), respectively.

5. The aviation wide-temperature-range stable control surface flutter suppression variable damping valve according to claim 4, characterized in that: The sealing rings 1 (4), 2 (5), 3 (6) and 4 (8) are made of fluororubber.

6. The aviation wide-temperature-range stable control surface flutter suppression variable damping valve according to claim 1, characterized in that: The oil port of the valve body (3) is connected to the aircraft's control surface drive system via a hydraulic pipeline.

7. The aviation wide-temperature-range stable control surface flutter suppression variable damping valve according to claim 1, characterized in that: A copper gasket (9) is provided between the valve body (3) and the plug (10).

Images