Anti-surge valve control mechanism and control method

Abstract

This invention belongs to the technical field of aero-engine bleed air device design, specifically relating to an anti-surge valve control mechanism, comprising: a controller, an angular displacement sensor, a valve adjustment assembly, and a valve. The valve adjustment assembly includes: a valve seat, a rotating shaft, a drive shaft, and a housing. The rotating shaft is mounted on the valve seat, forming four actuating chambers between the rotating shaft and the valve seat, with two opposing actuating chambers being interconnected. The valve seat is located within the housing, which has a pressure regulating port and a constant pressure port. One of two adjacent actuating chambers is connected to the constant pressure port, and the other is connected to the pressure regulating port. The controller controls the oil intake through the pressure regulating port to rotate the rotating shaft. The rotating shaft is fixedly connected to the drive shaft, which is connected to the valve. The valve opening is adjusted by rotating the shaft. The angular displacement sensor detects the valve opening in real time and feeds back to the controller. This invention provides continuously adjustable outlet flow, high control precision, and improved sensitivity and response time of the anti-surge valve control.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine bleed air device design technology, and relates to the design of a control mechanism for an aero-engine compressor bleed air anti-surge valve. Background Technology

[0002] To prevent surge during takeoff and landing of aero engines, it is necessary to adjust the bleed gas volume of the high-pressure compressor to improve the surge margin of the high-pressure compressor during engine acceleration. The bleed gas anti-surge valve control mechanism of the aero engine compressor is responsible for regulating the outlet gas flow of the anti-surge valve. Traditional aero engine bleed gas anti-surge valves are mostly linear motion control mechanisms with pneumatic and fuel control. The driving force cannot directly drive the valve, resulting in a complex control mechanism structure and multiple potential failure modes, which seriously affects the reliability of the anti-surge valve. In particular, when the anti-surge valve encounters complex alternating pressure and temperature, the switching rocker arm mechanism of the linear motion control mechanism may jam. Summary of the Invention

[0003] The purpose of this invention is to provide an anti-surge valve control mechanism to solve the technical problems mentioned above.

[0004] Technical solution: In one aspect, the present invention proposes an anti-surge valve control mechanism, the control mechanism comprising: a controller, an angular displacement sensor, a valve adjustment assembly, and a valve;

[0005] The valve adjustment assembly includes: a valve seat, a rotating shaft, a drive shaft, and a housing. The rotating shaft is mounted on the valve seat, forming four actuating chambers between the rotating shaft and the valve seat. Two opposing actuating chambers are interconnected. The valve seat is located inside the housing, which has a pressure regulating port and a constant pressure port. One actuating chamber in two adjacent actuating chambers is connected to the constant pressure port, and the other actuating chamber is connected to the pressure regulating port. The oil inlet of the pressure regulating port is controlled by a controller to achieve the rotation of the rotating shaft. The rotation is fixedly connected to the drive shaft, which is connected to the valve. The opening degree of the valve can be adjusted by rotating the shaft. An angular displacement sensor detects the opening degree of the valve in real time and feeds it back to the controller.

[0006] Furthermore, the housing is also provided with an oil guide groove. When the valve is in the closed state, the oil guide groove enables the four actuation chambers to communicate with each other through the throttling holes on the two adjacent control chambers. In this state, the fuel cooling flow can be effectively increased, and the heat dissipation performance of the entire structure can be improved.

[0007] Furthermore, a one-way valve is installed between the constant pressure port and the pressure regulating port to prevent the two sets of oppositely arranged actuation chambers from communicating and to ensure the required sealing pressure at both ends of the rotating shaft.

[0008] Furthermore, an oil drain port is provided on the housing to quickly guide fuel leaking from the four actuation chambers back to the fuel tank, preventing fuel leakage.

[0009] Furthermore, a temperature control valve is installed between the oil leak port and the constant pressure port. When the ambient temperature reaches a certain set value, the temperature control valve automatically opens to increase the fuel flow and improve the heat dissipation performance of the entire structure.

[0010] In another aspect, this invention also proposes an anti-surge valve control method. The controller receives the real-time feedback signal of the butterfly plate position in the anti-surge valve channel from the angular displacement sensor and determines the actual rotation angle A of the butterfly plate. The controller also acquires the aircraft altitude and determines the actual butterfly plate rotation angle A1 that needs to be adjusted for anti-surge based on the flight status. If the butterfly plate opening A is different from A1, the controller adjusts the pressure at the pressure regulating port of the anti-surge valve in a closed loop, so that the pressure regulating port and the constant pressure port produce different pressure differences. The rotating shaft drives the anti-surge valve butterfly plate to rotate a certain angle to ensure that the butterfly plate opening reaches A1. The rotation angle of the butterfly plate determines the flow area of ​​the butterfly valve channel. The throttling effect of this flow area plays the role of regulating the outlet flow of the anti-surge valve.

[0011] Technical effects of the present invention:

[0012] This invention relates to an improvement on the control mechanism of the bleed air butterfly valve for aero-engine compressors. It proposes a novel control mechanism and method for an aero-engine compressor bleed air anti-surge valve. The rotating rotor shaft of the control mechanism is directly connected to the valve shaft, acting on the valve to drive its movement. The control structure is simple and reliable. This control mechanism incorporates a one-way valve to prevent fuel from flowing between components during pressure changes in the fuel chamber. An internal temperature control valve automatically opens when the ambient temperature reaches a specified level, increasing fuel flow and rapidly dissipating heat generated by temperature rise. This prevents excessive temperature rise in the control mechanism, which could affect the reliability of its components and extend the reliability of the anti-surge valve.

[0013] The outlet flow of the anti-surge valve control mechanism of the above invention is controlled by a closed-loop controller, the outlet flow is continuously adjustable, the control accuracy is high, and the sensitivity and response time of the anti-surge valve control are improved. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the anti-surge valve control mechanism of the present invention;

[0016] Figure 2 This is a schematic diagram showing the anti-surge valve in the open state during a specific implementation of the present invention;

[0017] Figure 3 This is a schematic diagram of the anti-surge valve in the closed state during a specific implementation of the present invention;

[0018] The components include: channel 1, butterfly plate 2, shaft 3, actuating housing 4, first sealing ring 5, one-way valve 6, temperature control valve 7, angular displacement sensor 8, second sealing ring 9, sealing block 10, upper valve seat 11, upper valve seat sealing ring 12, one-way valve 13, rotating shaft 14, lower valve seat 15, lower valve seat sealing ring 16, and sealing block 17. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0021] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] This invention proposes a novel control mechanism for an anti-surge valve of an aero-engine compressor bleed air. The mechanism directly acts on the valve via a rotating mechanism, driving its movement. The control structure is simple and reliable. This invention relates to improvements to the control mechanism of an aero-engine compressor bleed air butterfly valve, aiming to extend the reliability of the anti-surge valve and enhance its control sensitivity and response time.

[0023] Figure 1This is a schematic diagram illustrating an anti-surge valve control mechanism and its control method according to a specific embodiment of the present invention.

[0024] refer to Figure 1 The anti-surge valve control mechanism consists of a channel 1, a butterfly plate 2, a shaft 3, an actuator housing 4, a first sealing ring 5, a one-way valve 6, a temperature control valve 7, an angular displacement sensor 8, a second sealing ring 9, a sealing block 10, an upper valve seat 11, an upper valve seat sealing ring 12, a one-way valve 13, a rotating shaft 14, a lower valve seat 15, a lower valve seat sealing ring 16, and a sealing block 17. In the closed state, the butterfly plate 2 divides the channel 1 into two sections, blocking the butterfly valve inlet and outlet, preventing intake pressure from reaching the outlet. (Reference) Figure 2 When the butterfly plate 2 of the butterfly valve rotates at a certain angle, a flow channel is formed between the butterfly plate 2 and the channel 1, and the intake pressure can be directed to the outlet. The flow area of ​​this flow channel is related to the rotation angle of the butterfly plate 2. The larger the rotation angle of the butterfly plate 2, the larger the outlet flow rate; the smaller the rotation angle of the butterfly plate 2, the smaller the outlet flow rate.

[0025] refer to Figure 3 When the pressure at the regulating port is less than the pressure at the constant pressure port, since the actuating chambers A and C are interconnected, the internal pressures of the actuating chambers A and C simultaneously push the rotating shaft 14 to rotate toward the closed position. The rotating shaft 14 drives the shaft 3 and the butterfly plate 2 to the closed position. At this time, the actuating chambers A, C, B, and D are interconnected through the throttle holes A and B, and the anti-surge valve control mechanism is in the closed state.

[0026] refer to Figure 2 When the pressure at the regulating port is greater than the pressure at the constant pressure port, since actuating chambers D and B are interconnected, the internal pressures of actuating chambers D and B simultaneously push the rotating shaft 14 to rotate towards the open position. The rotating shaft 14 drives shaft 3 and butterfly plate 2 to the open position. At this time, actuating chambers A and C, and actuating chambers B and D, are not interconnected, and the anti-surge valve control mechanism is in the open state. The opening angle of butterfly plate 2 is fed back to the controller via an angular displacement sensor. The controller controls the pressure at the regulating port to open butterfly plate 2 to a specific angle, meeting the system's venting requirements. In some specific implementations, the rotating shaft and drive shaft are fixed together by a pin to ensure consistent rotational transmission; the controller, angular displacement sensor, and valve adjustment assembly can be integrated into the same control housing to reduce overall structural weight and space volume.

[0027] refer to Figure 1 When the anti-surge valve is in the open or closed state, as the temperature inside or outside the anti-surge valve rises and reaches the set value, the internal temperature control valve 7 of the anti-surge valve control mechanism opens and flows out of the anti-surge valve through the oil leakage port, increasing the flow capacity of the oil inside the anti-surge valve and preventing the internal temperature of the anti-surge valve from rising too high.

[0028] The innovative design features of this invention are mainly reflected in the following aspects:

[0029] Key innovative design features: The air bleed valve control mechanism for aero-engines utilizes a controller that receives voltage signals from an angular displacement sensor regarding the butterfly plate position within the valve channel. This controller then adjusts the pressure at the valve's regulating port in a closed-loop manner, causing the shaft to rotate at a specific angle. The regulating port and the constant pressure port are connected via a throttling orifice, ensuring fluid flow within the valve control mechanism. By adjusting the pressure at the regulating port, the controller creates a pressure difference between the regulating and constant pressure ports. This pressure difference causes the shaft to rotate, pushing the butterfly plate of the valve to rotate at a specific angle. The rotation angle of the butterfly plate determines the flow area of ​​the valve channel, and the throttling effect of this flow area regulates the outlet flow rate of the valve.

[0030] Secondary innovative design point 1: The rotation angle of the anti-surge valve plate is fed back to the controller via an angular displacement sensor. The controller adjusts the pressure difference between the regulating port and the constant pressure port to ensure that the anti-surge valve plate angle reaches the system's set value. If the anti-surge valve plate angle is less than the set value, the controller increases the pressure at the regulating port, driving the shaft to rotate in the opening direction of the valve plate; if the anti-surge valve plate angle is greater than the set value, the controller decreases the pressure at the low pressure port, driving the shaft to rotate in the closing direction of the valve plate.

[0031] Secondary innovative design point 2: When the anti-surge valve is in the closed state, the pressure regulating port and the constant pressure port are connected through the throttling hole, so that the oil is in a state of flow inside the anti-surge valve.

[0032] Secondary innovative design point 3: When the anti-surge valve is in the open state, it closes the throttling orifice between the pressure regulating port and the constant pressure port to ensure the pressure difference between the pressure regulating port and the constant pressure port.

[0033] Secondary innovative design point 4: When the internal temperature of the anti-surge valve or the ambient temperature reaches the set value, the internal temperature control valve of the anti-surge valve control mechanism opens to increase the flow capacity of the oil and prevent the internal temperature of the anti-surge valve from rising too high.

[0034] Secondary innovative design point 5: When a certain pressure of oil is introduced into the constant pressure port, the one-way valve on the constant pressure port side opens and the one-way valve on the pressure regulating port side closes, ensuring that the sealing block maintains a seal under a certain pressure.

[0035] Secondary innovative design point 6: When a certain pressure of oil is introduced into the pressure regulating port, the one-way valve on the side of the pressure regulating port opens and the one-way valve on the side of the constant pressure port closes, ensuring that the sealing block maintains a seal under a certain pressure.

[0036] Secondary innovative design point 7: The angular displacement sensor has a double margin design. During the operation of the anti-surge valve, the dual-channel coils are energized simultaneously to provide the controller with the channel butterfly plate angular position signal.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A surge-proof valve control mechanism, characterized in that, The control mechanism includes: a controller, an angular displacement sensor, a valve adjustment assembly, and a valve; The valve adjustment assembly includes: a valve seat, a rotating shaft, a drive shaft, and a housing. The rotating shaft is mounted on the valve seat, forming four actuating chambers, with two opposing chambers communicating with each other. The valve seat is located inside the housing, which has a pressure regulating port and a constant pressure port. One actuating chamber in two adjacent chambers is connected to the constant pressure port, and the other is connected to the pressure regulating port. The controller controls the oil flow rate through the pressure regulating port to rotate the rotating shaft. This rotation is fixed to the drive shaft, which is connected to the valve. The valve opening is adjusted by rotating the shaft. An angular displacement sensor detects the valve opening in real time and sends feedback to the controller. The housing also has an oil guide groove. When the valve is closed... In the closed state, the oil guide groove enables the four actuating chambers to communicate with each other through the throttling orifices on the two adjacent control chambers; a one-way valve is provided between the constant pressure port and the pressure regulating port to prevent the two sets of opposite actuating chambers from communicating and to ensure the pressure required for sealing at both ends of the rotating shaft; an oil leakage port is also provided on the housing to quickly guide the fuel leaked from the four actuating chambers back to the fuel tank to prevent fuel leakage; a temperature control valve is also provided between the oil leakage port and the constant pressure port. When the ambient temperature reaches a certain set value, the temperature control valve automatically opens to increase the fuel flow and improve the heat dissipation performance of the entire structure; the rotating shaft and the drive shaft are fixed together by a pin; the controller, angular displacement sensor, and valve adjustment assembly can be integrated into the same control housing.

2. A method for controlling an anti-surge valve, applicable to the anti-surge valve control mechanism as described in claim 1, characterized in that, The controller receives the real-time feedback signal of the butterfly plate position in the anti-surge valve channel from the angular displacement sensor to determine the actual rotation angle A of the butterfly plate. The controller also obtains the aircraft altitude and determines the actual butterfly plate rotation angle A1 that needs to be adjusted for anti-surge based on the flight status. If the butterfly plate opening A is different from A1, the controller adjusts the pressure at the pressure regulating port of the anti-surge valve in a closed loop, so that different pressure differences are generated between the pressure regulating port and the constant pressure port. The rotating shaft drives the anti-surge valve butterfly plate to rotate a certain angle to ensure that the butterfly plate opening reaches A1. The rotation angle of the butterfly plate determines the flow area of ​​the butterfly valve channel. The throttling effect of this flow area plays the role of regulating the outlet flow of the anti-surge valve.

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