A hydraulic-mechanical guide vane adjustment system with high-altitude correction capability

Abstract

This invention provides a hydraulic-mechanical guide vane adjustment system with high-altitude correction capability, belonging to the field of aero-engine technology. It includes: a guide vane control device, a control valve, a program mechanism, a gas-liquid conversion device, and a pressure corrector. The program mechanism includes an actuator cylinder and a feedback assembly, with a three-dimensional cam mounted on the actuator cylinder. The gas-liquid conversion device includes a first adjustment valve and a first diaphragm. The pressure corrector includes a second adjustment valve, a second diaphragm, and an integrated assembly. This hydraulic-mechanical guide vane adjustment system with high-altitude correction capability can achieve guide vane adjustment control when the FADEC is interfered with or malfunctions, and can improve the guide vane adjustment control accuracy by combining ambient pressure and compressor gas pressure.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine technology, and in particular relates to a hydraulic-mechanical guide vane adjustment system with high-altitude correction capability. Background Technology

[0002] Modern high-performance turbofan engines generally employ a Front-Independent Digital Control (FADEC) system as the main control system to adjust the guide vane angle in the compressor to prevent surge and optimize engine performance. However, the FADEC system relies on electronic sensors, computers, and power supply, and is at risk of complete failure when encountering extreme electromagnetic interference or circuit failures.

[0003] To ensure flight safety, existing technologies generally include an additional independent guide vane backup adjustment system to ensure the compressor can continue operating normally when the FADEC is interfered with or malfunctions. However, traditional designs often employ simple fixed geometry or limited-range adjustment mechanisms, which cannot maintain stable and efficient engine operation across the entire flight envelope, and cannot correct the guide vane adjustment effect based on the aircraft's actual flight altitude. Therefore, they cannot meet practical application requirements. Summary of the Invention

[0004] In view of this, the present invention aims to provide a hydraulic mechanical guide vane adjustment system with high-altitude correction capability to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution created by this invention is implemented as follows:

[0006] A hydraulic-mechanical guide vane adjustment system with high-altitude correction capability, comprising:

[0007] A guide vane control device includes a hydraulic actuation component and a transmission component. The hydraulic actuation component is divided into two hydraulic chambers by a piston, and the piston is mechanically connected to the guide vane through the transmission component so that the angle of the guide vane changes with the movement of the piston.

[0008] The control valve has an oil supply chamber and a control chamber inside. The oil supply chamber is connected to the hydraulic oil circuit and is used to supply hydraulic oil to the hydraulic chamber in the guide vane control device. The control chamber is used to adjust the output pressure and output flow of the oil supply chamber.

[0009] The program mechanism includes an actuator cylinder and a feedback component. The actuator cylinder is equipped with a rotatable three-dimensional cam and has an upper chamber and a lower chamber inside. The upper chamber is connected to a hydraulic circuit, and the lower chamber is equipped with an adjusting spring. When there is a pressure difference between the upper and lower chambers, the actuator cylinder can drive the three-dimensional cam to perform lifting and lowering movements, changing the profile lift of the three-dimensional cam. The feedback component is mechanically coupled between the piston and the three-dimensional cam, and is used to make the three-dimensional cam rotate according to the piston's movement.

[0010] A gas-liquid conversion device, comprising a first regulating valve and a first diaphragm, wherein the first regulating valve is connected to a hydraulic oil circuit and is used to supply hydraulic oil to the lower chamber, and the first diaphragm is used to adjust the opening of the first regulating valve according to the ambient pressure.

[0011] A pressure corrector includes a second regulating valve, a second diaphragm, and an integrated assembly. The second regulating valve is connected to the control chamber via a control oil circuit. The second diaphragm outputs a combined force based on ambient pressure and compressor gas pressure. The integrated assembly is mechanically coupled between the second diaphragm, the three-dimensional cam, and the second regulating valve, and is used to adjust the opening of the second regulating valve based on the combined force and the profile lift change of the three-dimensional cam.

[0012] Furthermore, the hydraulic mechanical guide vane adjustment system with high-altitude correction capability also includes a selector, which is used to monitor the working status of the FADEC system and switch the on / off state of the control oil circuit according to the working status of the FADEC system.

[0013] The operating status of the FADEC system includes:

[0014] Power-on and power-off states;

[0015] The switching of the control oil circuit on / off according to the working state of the FADEC system includes:

[0016] The control oil circuit is closed when the FADEC system is powered on, and opened when the FADEC system is powered off.

[0017] Furthermore, the hydraulic mechanical guide vane adjustment system with high-altitude correction capability also includes a constant pressure valve, which is used to provide control oil with constant pressure to the control oil circuit.

[0018] Furthermore, the transmission assembly includes a transmission link, one end of which is hinged to the piston rod of the piston, and the other end is provided with a transmission rocker arm, which is connected to the journal of the guide vane.

[0019] Furthermore, the feedback component includes: a feedback lever, a feedback rack, and a feedback gear; one end of the feedback lever is hinged to the piston rod of the piston, and the other end is hinged to the feedback rack; the feedback gear meshes with the feedback rack, a first transmission gear is also provided on the gear shaft of the feedback gear, and a second transmission gear is also provided on the three-dimensional cam, and the second transmission gear meshes with the first transmission gear.

[0020] Furthermore, the integrated component includes a first integrated lever and a second integrated lever; the first end of the first integrated lever abuts against the profile of the three-dimensional cam via a roller, the second end of the first integrated lever is connected to the first end of the second integrated lever via an integrated spring, and the second end of the second integrated lever is connected to the actuating end of the second diaphragm; an integrated output rod is also provided at the fulcrum position of the second integrated lever, and the integrated output rod is connected to the valve core of the second regulating valve.

[0021] Furthermore, the first membrane box has an adjustment output rod on its actuating end, and the adjustment output rod is connected to the valve core of the first adjustment valve; the gas-liquid conversion device also includes an adjustable nozzle, and the adjustable nozzle is disposed on the connecting pipe between the first adjustment valve and the lower cavity.

[0022] Compared with existing technologies, the hydraulic-mechanical guide vane adjustment system with high-altitude correction capability described in this invention has the following advantages:

[0023] This invention discloses a hydraulic-mechanical guide vane adjustment system with high-altitude correction capabilities. Based on mechanical structure and hydraulic principles, it reliably and independently adjusts the guide vane angle without relying on electronic equipment, software, or external power sources. Therefore, it effectively counters electromagnetic interference and exhibits good adaptability under combat damage and extreme operating conditions. Furthermore, since the environmental pressure varies at different altitudes, and both the gas-liquid conversion device and the pressure corrector respond based on environmental pressure, this system can correct guide vane adjustment according to flight altitude, providing precise guide vane control throughout the engine's entire flight envelope. Additionally, since the compressor gas pressure varies under different operating conditions, and the pressure corrector responds based on compressor gas pressure, this system can also control the guide vanes according to actual operating conditions, preventing drastic fluctuations in engine operating conditions. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 A schematic diagram of the structure of the hydraulic-mechanical guide vane adjustment system with high-altitude correction capability as described in the embodiment of the present invention;

[0026] Figure 2 The diagram shows the structure of the gas-liquid conversion device, the program mechanism, and the pressure corrector described in the embodiments of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Guide vane control device; 11-Piston; 2-Control valve; 3-Program mechanism; 31-Actuator; 311-Upper chamber; 312-Lower chamber; 32-Three-dimensional cam; 331-Feedback lever; 332-Feedback rack; 333-Feedback gear; 334-First transmission gear; 335-Second transmission gear; 4-Gas-liquid conversion device; 41-First regulating valve; 42-First diaphragm; 421-Regulating output rod; 43-Adjustable nozzle; 5-Pressure corrector; 51-Second regulating valve; 52-Second diaphragm; 531-First integrated lever; 532-Roller; 533-Integrated spring; 534-Second integrated lever; 535-Integrated output rod; 6-Selector; 7-Constant pressure valve. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] A hydraulic-mechanical guide vane adjustment system with high-altitude correction capability, the structure of which can be made of Figure 1 and Figure 2 The following is an illustration. In this embodiment, the hydraulic-mechanical guide vane adjustment system with high-altitude correction capability includes: a guide vane control device 1, a control valve 2, a program mechanism 3, a gas-liquid conversion device 4, and a pressure corrector 5. In use, the control valve 2 supplies hydraulic oil to the guide vane control device 1. The guide vane control device 1 feeds back real-time guide vane angle information to the program mechanism 3 and, in response to the hydraulic oil supply effect, performs guide vane angle adjustment. The program mechanism 3, the gas-liquid conversion device 4, and the pressure corrector 5 work together to adjust the hydraulic oil output pressure and flow rate of the control valve 2, thereby matching the guide vane angle adjustment action of the guide vane control device 1 with actual needs.

[0034] Specifically, the guide vane control device 1 includes a hydraulic actuation assembly and a transmission assembly. The hydraulic actuation assembly is internally divided into two hydraulic chambers by a piston 11 (for ease of subsequent description, the two hydraulic chambers on either side of the piston 11 are referred to as the "propulsion chamber" and the "pull-in chamber," respectively. Both the propulsion chamber and the pull-in chamber are connected to the control valve 2 to allow hydraulic oil to enter, and both the propulsion chamber and the pull-in chamber should be connected to the return oil circuit to allow hydraulic oil to be discharged). The piston 11 is mechanically connected to the guide vane via the transmission assembly, so that the angle of the guide vane changes with the movement of the piston 11. Optionally, the transmission assembly in this embodiment includes a transmission link, one end of which is hinged to the piston rod of the piston 11, and the other end is provided with a transmission rocker arm, which is connected to the journal of the guide vane. When the piston 11 moves due to the pressure difference between the two hydraulic chambers, the movement of the piston 11 is transmitted to the guide vane through the transmission link and the transmission rocker arm, thereby adjusting the angle of the guide vane. It should be noted that the specific structure and working principle of the above-mentioned transmission assembly are all existing technologies, which can be correctly understood and applied by those skilled in the art. Meanwhile, the transmission component is not the core inventive point of this application, so it will not be described in detail in this document.

[0035] The control valve 2 has an oil supply chamber and a control chamber, with the oil supply chamber connected to the hydraulic oil circuit. During operation, the oil supply chamber supplies hydraulic oil to the hydraulic chamber in the guide vane control device 1, while the control chamber adjusts the output pressure and flow rate of the oil supply chamber. It should be noted that the oil supply chamber of the control valve 2 selectively supplies hydraulic oil to one hydraulic chamber in the guide vane control device 1 according to the actual guide vane adjustment needs, and guides the hydraulic oil in the other hydraulic chamber back to the oil circuit. For example, when the guide vane needs to open, the oil supply chamber supplies hydraulic oil to the pushing chamber, causing the piston 11 to move in the pushing direction; when the guide vane needs to close, the oil supply chamber supplies hydraulic oil to the pulling chamber, causing the piston to move in the pulling direction.

[0036] The program mechanism 3 includes an actuator cylinder 31 and a feedback component. The actuator cylinder 31 is equipped with a rotatable three-dimensional cam 32. Inside the actuator cylinder 31 are an upper chamber 311 and a lower chamber 312, with the upper chamber 311 connected to a hydraulic circuit and the lower chamber 312 containing an adjusting spring. When a pressure difference exists between the upper chamber 311 and the lower chamber 312, the actuator cylinder 31 can drive the three-dimensional cam 32 to move up and down, changing the profile lift of the three-dimensional cam 32. The feedback component is mechanically coupled between the piston 11 and the three-dimensional cam 32, used to make the three-dimensional cam 32 rotate according to the action of the piston 11. It should be noted that the three-dimensional cam 32 in this embodiment should have a precision-machined cam profile so that the guide vane control effect achieved by this system based on the change in the cam profile lift closely approximates the optimal law of FADEC control, thereby improving the performance of the aero-engine in backup mode.

[0037] Optionally, the feedback assembly may include a feedback lever 331, a feedback rack 332, and a feedback gear 333. One end of the feedback lever 331 is hinged to the piston rod of the piston 11, and the other end is hinged to the feedback rack 332. The feedback gear 333 meshes with the feedback rack 332. A first transmission gear 334 is also provided on the gear shaft of the feedback gear 333, and a second transmission gear 335 is also provided on the three-dimensional cam 32, with the second transmission gear 335 meshing with the first transmission gear 334. In use, the movement of the piston 11 is transmitted to the feedback rack 332 through the feedback lever 331, thereby driving the feedback rack 332 to move. Because the feedback gear 333 meshes with the feedback rack, the feedback gear 333 rotates when the feedback rack 332 moves. Next, the cooperation of the first transmission gear 334 and the second transmission gear 335 can transmit the rotation of the feedback gear 333 to the three-dimensional cam 32, thereby changing the rotation angle of the three-dimensional cam 32 so as to realize the closed-loop feedback of the guide vane angle.

[0038] Because the aircraft experiences different environmental pressures at different flight altitudes, the gas-liquid conversion device 4 includes a first regulating valve 41 and a first diaphragm 42 to enable the system to correct the guide vane adjustment effect according to the flight altitude. The first regulating valve 41 is connected to the hydraulic oil circuit and is used to supply hydraulic oil to the lower chamber 312 of the actuator 31 of the program mechanism 3. The first diaphragm 42 is used to adjust the opening of the first regulating valve 41 according to the environmental pressure, thereby achieving the purpose of regulating the pressure in the lower chamber 312.

[0039] Optionally, to enable the first diaphragm 42 to adjust the opening of the first regulating valve 41, an adjusting output rod 421 may be provided on the actuating end of the first diaphragm 42, and the adjusting output rod 421 should be connected to the valve core of the first regulating valve 41. It should be noted that the first diaphragm 42 in this embodiment is an existing pressure measuring device. When the pressure changes, the actuating end of the first diaphragm 42 (which may be the diaphragm or the diaphragm within the diaphragm) will displace according to the pressure change. At this time, the adjusting output rod 421 will drive the valve core of the first regulating valve 41 to move, thereby changing the opening of the first regulating valve 41.

[0040] When the opening of the first regulating valve 41 changes, the flow rate of hydraulic oil entering the lower chamber 312 will change accordingly, thus changing the hydraulic oil pressure inside the lower chamber 312. Since the lower chamber 312 is equipped with an adjusting spring, the actual pressure of the lower chamber 312 is the sum of the elastic force of the adjusting spring and the hydraulic oil pressure. When the hydraulic oil pressure changes due to the ambient pressure, the original pressure balance between the upper chamber 311 and the lower chamber 312 will be disrupted. Therefore, the actuator 3 will drive the three-dimensional cam 32 to move up and down under the action of the pressure difference between the upper chamber 311 and the lower chamber 312, thereby changing the profile lift of the three-dimensional cam 32.

[0041] In addition, to reasonably control the pressure inside the lower chamber 312, the gas-liquid conversion device 4 may also include an adjustable nozzle 43, and the adjustable nozzle 43 should be installed on the connecting pipe between the first adjusting valve 41 and the lower chamber 312. Before use, the operator can change the opening of the adjustable nozzle 43 according to the actual hardware of the system and the aero-engine, and make the adjusting spring generate an appropriate elastic force to avoid the formation of an unrealistic pressure difference between the upper chamber 311 and the lower chamber 312, and ensure that the lifting stroke of the three-dimensional cam 32 matches its own profile range.

[0042] Because the gas pressure of the compressor varies under different operating conditions, in order to match the guide vane adjustment control effect of this system with the actual operating conditions of the compressor, the pressure corrector 5 includes: a second adjusting valve 51, a second diaphragm 52, and an integrated component. The second adjusting valve 51 is connected to the control chamber via a control oil circuit. The second diaphragm 52 outputs a combined force based on the ambient pressure and the compressor's gas pressure. The integrated component is mechanically coupled between the second diaphragm 52, the three-dimensional cam 32, and the second adjusting valve 51, and is used to adjust the opening of the second adjusting valve 51 according to the combined force and the change in the profile lift of the three-dimensional cam 32.

[0043] It should be noted that the second diaphragm 52 in this embodiment is similar to the first diaphragm 42, both being existing pressure measuring devices. When the gas pressure of the compressor and the ambient pressure change, the displacement of the actuating end of the second diaphragm 52 will generate a combined force, thereby realizing the correlation between pressure change and mechanical action.

[0044] Optionally, the integrated component in this embodiment may include a first integrated lever 531 and a second integrated lever 534. The first end of the first integrated lever 531 abuts against the surface of the three-dimensional cam 32 via a roller 532. The second end of the first integrated lever 531 is connected to the first end of the second integrated lever 534 via an integrated spring 533. The second end of the second integrated lever 534 is connected to the actuating end of the second diaphragm 52. An integrated output rod 535 is also provided at the fulcrum position of the second integrated lever 534, and the integrated output rod 535 is connected to the valve core of the second adjusting valve 51.

[0045] Since the first end of the first integrated lever 531 abuts against the surface of the three-dimensional cam 32 via the roller 532, the change in the lift of the three-dimensional cam 32 inputs a lift-changing force to the first end of the first integrated lever 531. Subsequently, the first integrated lever 531 transmits this lift-changing force to the second integrated lever 534, which combines with the combined force formed by the second diaphragm 52, causing the second integrated lever 534 to actuate. When the second integrated lever 534 actuates, the integrated output rod 535 drives the valve core of the second regulating valve 51 to move, thereby changing the opening of the second regulating valve 51 and causing a change in the pressure inside the control chamber of the control valve 2. This changes the output pressure and output flow of the oil supply chamber of the control valve 2, causing the piston 11 in the guide vane control device 1 to actuate, thus achieving the purpose of guide vane adjustment.

[0046] As an optional implementation of this embodiment, to ensure a stable and reliable supply of control oil in the control circuit, the hydraulic-mechanical guide vane adjustment system with high-altitude correction capability may further include a constant-pressure valve 7. In use, the constant-pressure valve 7 provides control oil with a constant pressure to the control circuit, preventing the control chamber pressure of the control valve 2 from being affected by other factors.

[0047] Furthermore, since modern high-performance turbofan engines generally employ a digital electronic control (FADEC) system as the main control system to adjust the guide vane angle in the compressor, the hydraulic-mechanical guide vane adjustment system with high-altitude correction capability in this embodiment may also include a selector 6 to ensure timely intervention in case of FADEC failure. Specifically, the selector 6 monitors the operating status of the FADEC system and switches the control oil circuit on / off according to the operating status of the FADEC system. Typically, the operating status of the FADEC system includes an energized state and a de-energized state. Correspondingly, the selector 6's switching of the control oil circuit according to the operating status of the FADEC system should include: closing the control oil circuit when the FADEC system is energized, and opening the control oil circuit when the FADEC system is de-energized.

[0048] The working process of the above scheme is briefly described below:

[0049] When the FADEC system loses power, this system will take over the control circuit of the guide vane. Control oil enters the control oil circuit through the constant pressure valve 7. The selector 6 connects the control chamber of the control valve 2 with the second regulating valve 51 in the pressure corrector 5, at which point the system can start working. The current angle information of the guide vane is fed back to the program mechanism 3 by the guide vane control device 1 and the feedback component, thereby changing the rotation angle of the three-dimensional cam 32. The ambient pressure adjusts the opening of the first regulating valve 41 through the first diaphragm 42 of the gas-liquid conversion device 4, changing the pressure in the lower chamber 312. Under the action of the pressure difference between the lower chamber 312 and the upper chamber 311, the three-dimensional cam 32 will perform lifting and lowering motion, changing the profile lift of the three-dimensional cam 32, thereby inputting a lift change force to the integrated component. The second diaphragm 52 of the pressure corrector 5 inputs a combined force to the integrated component based on the gas pressure of the compressor and the ambient pressure. Under the combined action of the lifting change force and the combined force, the integrated component causes the opening of the second regulating valve 51 to change, thereby altering the pressure in the control chamber inside the control valve 2. Subsequently, the hydraulic oil pressure and flow rate supplied by the control valve 2 to the guide vane control device 1 will change, thus causing the piston 11 inside the guide vane control device 1 to actuate, thereby changing the angle of the guide vane and realizing the adjustment and control of the guide vane.

[0050] The effects of the above solution are explained below:

[0051] This embodiment provides a hydraulic-mechanical guide vane adjustment system with high-altitude correction capabilities. Based on mechanical structure and hydraulic principles, it can reliably and independently adjust the guide vane angle without relying on electronic equipment, software, or external power sources. Therefore, it can effectively cope with electromagnetic interference and has good adaptability under combat damage and extreme operating conditions. Furthermore, since the environmental pressure varies at different altitudes, and both the gas-liquid conversion device and the pressure corrector can respond based on environmental pressure, this system can correct guide vane adjustment according to flight altitude, providing precise guide vane control throughout the engine's entire flight envelope. Additionally, since the compressor gas pressure varies under different operating conditions, and the pressure corrector can respond based on compressor gas pressure, this system can also control the guide vanes according to actual operating conditions, avoiding drastic fluctuations in engine operating conditions.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic-mechanical guide vane adjustment system with high-altitude correction capability, characterized in that, include: The guide vane control device (1) includes a hydraulic actuation component and a transmission component. The hydraulic actuation component is divided into two hydraulic chambers by a piston (11), and the piston (11) is mechanically connected to the guide vane through the transmission component so that the angle of the guide vane changes with the movement of the piston (11). The control valve (2) has an oil supply chamber and a control chamber inside. The oil supply chamber is connected to the hydraulic oil circuit and is used to supply hydraulic oil to the hydraulic chamber in the guide vane control device (1). The control chamber is used to adjust the output pressure and output flow of the oil supply chamber. The program mechanism (3) includes an actuator (31) and a feedback component. The actuator (31) is provided with a rotatable three-dimensional cam (32). The actuator (31) has an upper cavity (311) and a lower cavity (312) inside. The upper cavity (311) is connected to the hydraulic oil circuit. The lower cavity (312) is provided with an adjusting spring. When there is a pressure difference between the upper cavity (311) and the lower cavity (312), the actuator (31) can drive the three-dimensional cam (32) to perform lifting and lowering movements, thereby changing the profile lift of the three-dimensional cam (32). The feedback component is mechanically coupled between the piston (11) and the three-dimensional cam (32) to make the three-dimensional cam (32) rotate according to the action of the piston (11). A gas-liquid conversion device (4) includes a first regulating valve (41) and a first diaphragm (42). The first regulating valve (41) is connected to a hydraulic oil circuit and is used to supply hydraulic oil to the lower chamber (312). The first diaphragm (42) is used to adjust the opening of the first regulating valve (41) according to the ambient pressure. The pressure corrector (5) includes: a second regulating valve (51), a second diaphragm (52), and an integrated assembly; The second regulating valve (51) is connected to the control chamber through the control oil circuit; the second diaphragm (52) is used to output a combined force according to the ambient pressure and the gas pressure of the compressor. The integrated component is mechanically coupled between the second diaphragm (52), the three-dimensional cam (32) and the second regulating valve (51), and is used to adjust the opening of the second regulating valve (51) according to the combined force and the profile lift change of the three-dimensional cam (32).

2. The hydraulic-mechanical guide vane adjustment system with high-altitude correction capability according to claim 1, characterized in that: The hydraulic mechanical guide vane adjustment system with high-altitude correction capability further includes a selector (6), which is used to monitor the working status of the FADEC system and switch the on / off state of the control oil circuit according to the working status of the FADEC system. The operating status of the FADEC system includes: Power-on and power-off states; The switching of the control oil circuit on / off according to the working state of the FADEC system includes: The control oil circuit is closed when the FADEC system is powered on, and opened when the FADEC system is powered off.

3. The hydraulic-mechanical guide vane adjustment system with high-altitude correction capability according to claim 1, characterized in that: The hydraulic mechanical guide vane adjustment system with high-altitude correction capability further includes a constant pressure valve (7), which is used to provide control oil with constant pressure to the control oil circuit.

4. A hydraulic-mechanical guide vane adjustment system with high-altitude correction capability according to claim 1, characterized in that: The transmission assembly includes a transmission link, one end of which is hinged to the piston rod of the piston (11), and the other end is provided with a transmission rocker arm, which is connected to the journal of the guide vane.

5. A hydraulic-mechanical guide vane adjustment system with high-altitude correction capability according to claim 1, characterized in that: The feedback assembly includes a feedback lever (331), a feedback rack (332), and a feedback gear (333); one end of the feedback lever (331) is hinged to the piston rod of the piston (11), and the other end is hinged to the feedback rack (332); the feedback gear (333) meshes with the feedback rack (332), a first transmission gear (334) is provided on the gear shaft of the feedback gear (333), and a second transmission gear (335) is provided on the three-dimensional cam (32), and the second transmission gear (335) meshes with the first transmission gear (334).

6. A hydraulic-mechanical guide vane adjustment system with high-altitude correction capability according to claim 1, characterized in that: The integrated component includes a first integrated lever (531) and a second integrated lever (534); the first end of the first integrated lever (531) abuts against the profile of the three-dimensional cam (32) via a roller (532), the second end of the first integrated lever (531) is connected to the first end of the second integrated lever (534) via an integrated spring (533), and the second end of the second integrated lever (534) is connected to the actuating end of the second diaphragm (52); an integrated output rod (535) is also provided at the fulcrum position of the second integrated lever (534), and the integrated output rod (535) is connected to the valve core of the second regulating valve (51).

7. A hydraulic-mechanical guide vane adjustment system with high-altitude correction capability according to claim 1, characterized in that: The first membrane box (42) is provided with an adjustment output rod (421) on its actuating end. The adjustment output rod (421) is connected to the valve core of the first adjustment valve (41). The gas-liquid conversion device (4) also includes an adjustable nozzle (43), and the adjustable nozzle (43) is provided on the connecting pipe between the first adjustment valve (41) and the lower cavity (312).

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