A high-frequency, high-flow fuel regulating valve and its control method

Abstract

The present invention discloses a high-frequency, high-flow fuel regulating valve and a control method thereof. The high-frequency, high-flow fuel regulating valve comprises a valve body, a valve core, a valve sleeve, a multi-dimensional discrete magnetostrictive actuator, and a voice coil motor. The valve core and valve sleeve are both movable and jointly determine the valve opening. The voice coil motor drives the valve sleeve to achieve large-stroke control of the valve and perform low-frequency average flow regulation. The multi-dimensional discrete magnetostrictive actuator drives the valve core to achieve small-stroke control of the valve and perform high-frequency transient flow regulation. The multi-dimensional discrete magnetostrictive actuator utilizes an induction coil to achieve closed-loop position control and a temperature sensor to achieve thermal error compensation. The voice coil motor utilizes an eddy current displacement sensor to achieve closed-loop position control. The present invention is applicable to the field of active combustion control of aircraft engines and can simultaneously meet the requirements of aircraft engines for suppressing high-frequency combustion oscillations and regulating low-frequency average fuel flow.

Description

Technical Field

[0001] The present invention relates to a high-frequency and large-flow fuel regulating valve and a control method thereof, belonging to the technical field of hydraulic servo control. Background Art

[0002] With the development of modern aircraft engines, low emissions and high efficiency have become two key requirements, leading to the widespread application of lean burn technology. However, while this technology achieves energy conservation and emission reduction, it can also introduce combustion oscillations, a serious threat to aircraft engine operational safety. Active combustion control through fuel flow regulation can effectively suppress combustion oscillations, but existing fuel regulating valves cannot meet the high-frequency fuel regulation requirements of active combustion control, as the regulation frequency often reaches 1000Hz. Furthermore, the fuel regulating valve is a key component of aircraft engine control systems, responsible for regulating the average fuel flow rate during normal engine operation. Its performance is directly related to aircraft engine performance indicators. Improving the frequency response and load capacity of mechanical converters is a prerequisite for improving the frequency response of fuel regulating valves. Currently, the development of advanced manufacturing and microelectronics technologies, as well as the research and development of converters based on new functional materials, has made the realization and application of new high-frequency electromechanical converters a reality.

[0003] Giant Magnetostricitive Material (GMM) has excellent properties such as fast response speed, high energy transfer density, and large output force. The Giant Magnetostricitive Actuator (GMA) is a new type of motor converter based on GMM and a fundamental device for GMM application research. Compared with traditional motor converters and motor converters driven by other smart materials, GMA has significant advantages such as fast response, large output force, high energy conversion density, and high output displacement accuracy. The National Aeronautics and Space Administration (NASA) conducted application research on GMM as early as the last century and developed a number of fuel regulating valves for active combustion control of aircraft engines using its high-frequency characteristics.

[0004] NASA published a high-frequency fuel modulation valve for active combustion control in aeroengines (Saus J, Delaat J, Chang C, et al. Performance Evaluation of a High-Bandwidth Liquid Fuel Modulation Valve for Active Combustion Control [C] / / 50th AIAAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. 2012: 1274). The valve's drive mechanism utilizes a GMA (Giant Magnetostrictive Material) based on Terfenol-D and a stepper motor. The GMA drives the valve core for high-frequency fuel modulation, while the stepper motor drives the cam for average flow control. Experimental results show that the valve has a bandwidth of 600 Hz and a fuel regulation capacity of 500 lbm / hr (4.84 L / min).

[0005] NASA's Reference 2 (Saus JR, Thomas R. An overview of high-bandwidth liquid fuel flow modulators developed for active combustion control research [R]. Cleveland: NASA John H. Glenn Research Center, 2018) discloses another high-frequency fuel control valve for active combustion control in aircraft engines. This valve also uses a combination of a giant magnetostrictive material (GMA) (Terfenol-D) and a stepper motor as its drive mechanism. The GMA drives the valve core for high-frequency fuel regulation, while the stepper motor drives the cam for average flow control. Experimental results show that this fuel control valve has a bandwidth of 1000 Hz and a fuel regulation capacity of 90 lbm / hr (0.872 L / min).

[0006] The GMAs used in both of these fuel regulating valves utilize a single-coil drive system. This system modulates the input current of a controllable constant current source while simultaneously adding a DC bias to the drive current. This bias magnetic field is also generated by the single coil. This drive method requires a high number of coil turns, resulting in a significant decrease in frequency response, as well as high requirements for the controllable constant current source, resulting in significant heat generation. Furthermore, the displacement of the GMM is approximately 2‰ of its length. To achieve sufficient output displacement, the resulting GMAs are often very large. Consequently, to achieve adequate fuel regulation capacity, the lengths of the two fuel regulating valves mentioned above reach 457.2mm and 445.6mm, respectively. In order to enable the GMA to obtain a sufficiently large output displacement within a limited volume, Zhu Yuchuan of Nanjing University of Aeronautics and Astronautics disclosed a new giant magnetostrictive rod-rod composite drive motor converter in document 3 (Giant magnetostrictive rod-rod composite drive electromechanical converter and its working method, Zhu Yuchuan, Nanjing University of Aeronautics and Astronautics, Chinese Patent No.: ZL201110191959.4). The motor converter has two giant magnetostrictive rods arranged radially, and force and displacement are transmitted through a Z-shaped force transmission cylinder, thereby achieving micro-displacement amplification. However, due to the radial arrangement of the magnetostrictive stack, the inner diameter of the coil increases. With the same number of turns, the coil volume increases, the inductive reactance increases, and its temperature control is achieved by an additional temperature control device.

[0007] The stepper motors used in the two aforementioned fuel regulating valves are large, have poor precision, low frequency response, and low output force. The cam mechanisms they drive are prone to jamming when adjusting average flow, and their stability and reliability are compromised. Voice coil motors (VCMs), on the other hand, offer small size, high output force, and large output displacement, and have been widely used in direct-drive servo valve systems in recent years.

[0008] In summary, although the existing fuel regulating valves for active combustion control of aircraft engines have met the standards in terms of frequency response, they are large in size and generate severe heat, and cannot yet meet the aircraft engine's requirements for high efficiency, small size and high power-to-weight ratio. Summary of the Invention

[0009] The object of the present invention is to provide a novel high-frequency and high-flow fuel regulating valve with compact structure, small volume, large flow, high bandwidth, high precision, high thermal stability and self-sensing, and its working method.

[0010] To achieve the above objectives, the present invention provides, on one hand, a high-frequency, high-flow fuel regulating valve, comprising a multi-dimensional discrete magnetostrictive actuator, a hydraulic valve system, and a voice coil motor;

[0011] The multi-dimensional discrete magnetostrictive actuator includes a pre-pressure applying device, a discrete bias magnetic field applying device, an axial discrete electromagnetic excitation device and an axial-radial two-dimensional discrete magnetostrictive stack;

[0012] The preload applying device comprises an aluminum housing, a preload end cap and an anti-twist output rod are mounted on the upper end of the aluminum housing, a disc spring is mounted between the preload end cap and the anti-twist output rod, the lower end surface of the disc spring contacts the surface of the anti-twist output rod, and the upper end surface of the disc spring contacts the lower surface of the preload end cap;

[0013] The discrete bias magnetic field applying device comprises a magnetic inner shell, a magnetic base is installed at the lower end of the aluminum outer shell, annular permanent magnets and large magnetic rings are alternately installed between the magnetic inner shell and the magnetic base, and a temperature sensor is installed in the magnetic base;

[0014] The axial discrete electromagnetic excitation device comprises a discrete coil frame, an axial discrete excitation coil is mounted on the outside of the discrete coil frame, and an induction coil is mounted between the excitation coil and the discrete coil frame;

[0015] The axial-radial two-dimensional discrete magnetostrictive stack comprises four axially stacked outer annular magnetostrictive rods, an outer magnetic conductive ring is mounted above the outer magnetic conductive ring, an outer U-shaped sleeve is mounted above the outer magnetic conductive ring, a lower magnetic conductive body is mounted below the outer U-shaped sleeve, four axially stacked inner annular magnetostrictive rods are mounted above the lower magnetic conductive body, an inner magnetic conductive ring is mounted above the inner annular magnetostrictive rod, an inner U-shaped sleeve is mounted above the inner magnetic conductive ring, an upper magnetic conductive body is mounted below the inner U-shaped sleeve, and four axially stacked cylindrical magnetostrictive rods are mounted above the upper magnetic conductive body;

[0016] The hydraulic valve system includes a valve body, an inlet pipe joint is installed on one side of the valve body, an outlet pipe joint is installed on the other side of the valve body, a valve sleeve is arranged inside the valve body, a valve core is installed inside the valve sleeve, and a spring is arranged below the valve sleeve;

[0017] The voice coil motor includes a tile-shaped permanent magnet, a coil frame is installed inside the tile-shaped permanent magnet, a voice coil motor excitation coil is arranged between the tile-shaped permanent magnet and the coil frame, a lower magnetic isolation washer is arranged below the tile-shaped permanent magnet, an upper magnetic isolation washer is arranged above the tile-shaped permanent magnet, a magnetic conductive top cover is installed above the upper magnetic isolation washer, an eddy current displacement sensor is arranged inside the magnetic conductive top cover, a connecting screw is connected between the coil frame and the eddy current displacement sensor, and the connecting screw is connected to a connecting nut.

[0018] As an optimal technical solution, the anti-twist output rod and the valve core are threadedly connected, and the multi-dimensional discrete magnetostrictive actuator drives the valve core through the anti-twist output rod to achieve high-frequency small opening control of the valve port.

[0019] As a preferred technical solution, the connecting screws, connecting nuts and valve sleeves are all threadedly connected, and the voice coil motor drives the valve sleeve through the coil skeleton to achieve low-frequency large-opening control of the valve port.

[0020] As an optimal technical solution, the magnetic upper cover and the valve body are threadedly connected, and the bottom of the magnetic upper cover is in contact with the coil frame. The valve cover amount is adjusted by rotating the magnetic upper cover to push the coil frame to adjust the initial position of the valve sleeve.

[0021] In another aspect, the present invention further provides a control method for a high-frequency, high-flow fuel regulating valve based on any of the above-mentioned technical solutions. This control method adjusts the average flow rate by driving a valve sleeve via a voice coil motor based on a reference signal, adjusts the high-frequency transient flow rate by driving a valve core via a multi-dimensional discrete magnetostrictive actuator based on a pressure oscillation signal, implements closed-loop control of the valve sleeve position via an eddy current displacement sensor, implements closed-loop control of the valve core position by sensing the magnetic induction intensity inside the actuator via multiple independent axially discrete induction coils, and implements thermally induced displacement error compensation via sensing the internal temperature of the actuator via a temperature sensor. The specific process is as follows:

[0022] Average flow regulation: Based on the target flow, the controller generates a control signal to drive the voice coil motor excitation coil, which generates a Lorentz force in the constant magnetic field of the tile-shaped permanent magnet to push the valve sleeve. After balancing with the spring force, a certain valve opening is obtained to achieve average flow regulation;

[0023] Transient flow regulation: Based on the high-frequency combustion oscillation signal, the active controller generates an anti-phase suppression signal to drive the discrete excitation coils of the multi-dimensional discrete magnetostrictive actuator to generate an excitation magnetic field. This, in conjunction with the bias magnetic field generated by the annular permanent magnet, drives the magnetostrictive stack to deform, pushing the output rod to generate a high-frequency displacement output, driving the valve core to adjust the valve opening in real time, thus achieving transient flow regulation.

[0024] Thermal error compensation: The temperature sensor senses the temperature in real time, and the controller calculates and generates compensation signals in real time to correct the outputs of the voice coil motor and multi-dimensional discrete magnetostrictive actuator respectively to achieve thermal error compensation.

[0025] In the above control method, preferably, the magnetic induction intensity inside the actuator is sensed in real time by the induction coil to calculate the valve core movement position in real time, thereby realizing the position feedback control of the valve core.

[0026] In the above control method, preferably, the position feedback control of the valve sleeve is achieved by sensing the movement position of the valve sleeve in real time through an eddy current displacement sensor.

[0027] In the above control method, preferably, the internal temperature of the multi-dimensional discrete magnetostrictive actuator is sensed in real time by a temperature sensor, and the performance degradation degree and thermally induced displacement of the multi-dimensional discrete magnetostrictive actuator are calculated in real time by a controller to achieve thermally induced error compensation of the fuel regulating valve.

[0028] In the above control method, preferably, the power consumption of the fuel regulating valve is reduced by switching between working mode 1, working mode 2, working mode 3, and working mode 4;

[0029] There are four discrete excitation coils 25; the four discrete excitation coils 25 are coaxially arranged, and from bottom to top are coil I, coil II, coil III, and coil IV;

[0030] When switching to working mode 1, coils I to IV work in sequence, and the order is: ① Coil I works, coils II to IV do not work; ② Coil II works, coils I, III, and IV do not work; ③ Coil III works, coils I, II, and IV do not work; ④ Coil IV works, coils I to III do not work;

[0031] When switching to working mode 2, coils I and III work alternately with coils II and IV. The order is: ① coils I and III work, coils II and IV do not work; ② coils II and IV work, coils I and III do not work;

[0032] When switching to working mode 3, coils I to IV stop working in sequence, and the order is as follows: ① Coil I stops working, and coils II to IV work; ② Coil II stops working, and coils I, III, and IV work; ③ Coil III stops working, and coils I, II, and IV work; ④ Coil IV stops working, and coils I to III work;

[0033] When switching to working mode 4, coil I, coil II, coil III and coil IV work simultaneously.

[0034] In the above control method, preferably, when the combustion oscillation amplitude is less than 25% of the saturated output capacity of the multi-dimensional discrete magnetostrictive actuator, the actuator intelligently switches to working mode 1; when the combustion oscillation amplitude is 25% to 50% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 2; when the combustion oscillation amplitude is 50% to 75% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 3; when the combustion oscillation amplitude is 75% to 100% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 4.

[0035] The present invention provides a high-frequency, high-flow fuel regulating valve and an operating method thereof. Different from ordinary fuel regulating valves, this fuel regulating valve fully utilizes the respective characteristics of a magnetostrictive actuator and a voice coil motor, adopts a multi-dimensional discrete magnetostrictive stack configuration, and has the significant feature of decoupling average flow regulation from transient flow regulation. It has the following significant advantages: small size, compact structure, large flow, wide bandwidth, low heat generation, high control accuracy, high thermal stability, and self-induction. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The overall structure of a high-frequency, high-flow fuel regulating valve provided by one embodiment of the present invention

[0037] Figure 2A cross-sectional view of the structure of a high-frequency, high-flow fuel regulating valve provided by one embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the structure of an axial discrete electromagnetic excitation device provided in one embodiment of the present invention;

[0039] Figure 4 A schematic diagram of an axial-radial two-dimensional discrete giant magnetostrictive stack according to an embodiment of the present invention;

[0040] Figure 5 A structural diagram of an anti-twist output rod provided in one embodiment of the present invention;

[0041] Figure 6 A structural diagram of a tile-shaped permanent magnet provided in one embodiment of the present invention;

[0042] Figure 7 A structural diagram of an annular permanent magnet provided in one embodiment of the present invention;

[0043] Figure 8 A diagram showing the structure of a valve core according to an embodiment of the present invention;

[0044] Figure 9 A structural diagram of a valve sleeve provided in one embodiment of the present invention;

[0045] Figure 10 A structural diagram of a valve body provided in one embodiment of the present invention;

[0046] Figure 11 The working sequence of the excitation coil of the actuator in working mode 1 to working mode 4 provided in one embodiment of the present invention;

[0047] The reference numbers in the figure are: 1-valve body, 2-watt type permanent magnet, 3-voice coil motor excitation coil, 4-coil skeleton, 5-lower magnetic isolation gasket, 6-valve core, 7-valve sleeve, 8-inlet pipe joint, 9-spring, 10-pre-tightening end cover, 11-aluminum shell, 12-magnetic inner shell, 13-annular permanent magnet, 14-large magnetic ring, 15-discrete coil skeleton, 16-magnetic base, 17-outer annular magnetostrictive rod, 18-outer U-shaped sleeve, 19-lower magnetic, 20-temperature sensor Sensor, 21-upper magnetic conductor, 22-inner U-shaped sleeve, 23-inner annular magnetostrictive rod, 24-cylindrical magnetostrictive rod, 25-axial discrete excitation coil, 26-induction coil, 27-outer magnetic conductor ring, 28-inner magnetic conductor ring, 29-anti-twist output rod, 30-disc spring, 31-valve body-aluminum shell connecting screws, 32-outlet pipe joint, 33-connecting nut, 34-connecting screws, 35-upper magnetic isolation washer, 36-magnetic upper cover, 37-eddy current displacement sensor. DETAILED DESCRIPTION

[0048] In order to more intuitively and clearly describe the structural principles and working methods in the examples of the present invention, the embodiments will be introduced below in conjunction with relevant drawings. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] This embodiment provides a high-frequency, high-flow fuel regulating valve and a control method thereof, which can simultaneously achieve regulation of average fuel flow and regulation of high-frequency transient flow in a relatively small volume.

[0050] like Figure 1 and Figure 2 As shown, this embodiment provides a high-frequency, high-flow fuel regulating valve, including a multi-dimensional discrete magnetostrictive actuator, a hydraulic valve system, and a voice coil motor. The multi-dimensional discrete magnetostrictive actuator includes a pre-pressure applying device, a discrete bias magnetic field applying device, an axial discrete electromagnetic excitation device, and an axial-radial two-dimensional discrete magnetostrictive stack.

[0051] Furthermore, the preload applying device comprises an aluminum housing 11, the upper end of which is provided with a preload end cap 10 and an anti-twist output rod 29. The structure of the anti-twist output rod 29 is as follows: Figure 5 A disc spring 30 is installed between the pre-tightening end cover 10 and the anti-twist output rod 29 , the lower end surface of the disc spring 30 contacts the surface of the anti-twist output rod 29 , and the upper end surface of the disc spring 30 contacts the lower surface of the pre-tightening end cover 10 .

[0052] Furthermore, the discrete bias magnetic field applying device includes a magnetic inner shell 12, a magnetic base 16 is installed at the lower end of the aluminum outer shell 11, and an annular permanent magnet 13 and a large magnetic ring 14 are alternately arranged between the magnetic inner shell 12 and the magnetic base 16. The structure of the annular permanent magnet 13 is as follows: Figure 7 As shown. A temperature sensor 20 is provided in the magnetic base 16;

[0053] Furthermore, the axial discrete electromagnetic excitation device includes a discrete coil skeleton 15 , an axial discrete excitation coil 25 is mounted on the outside of the discrete coil skeleton 15 , and an induction coil 26 is provided between the excitation coil 25 and the discrete coil skeleton 15 .

[0054] Furthermore, the axial-radial two-dimensional discrete magnetostrictive stack includes four outer annular magnetostrictive rods 17 stacked axially, an outer magnetic conductive ring 27 is installed above the outer annular magnetostrictive rods 17, an outer U-shaped sleeve 18 is provided above the outer magnetic conductive ring 27, a lower magnetic conductive body 19 is provided at the lower portion of the outer U-shaped sleeve 18, four inner annular magnetostrictive rods 23 are axially stacked above the lower magnetic conductive body 19, an inner magnetic conductive ring 28 is installed above the inner annular magnetostrictive rods 23, an inner U-shaped sleeve 22 is provided above the magnetic conductive ring 28, an upper magnetic conductive body 21 is installed at the lower portion of the inner U-shaped sleeve 22, and four cylindrical magnetostrictive rods 24 are axially stacked above the upper magnetic conductive body 21.

[0055] Furthermore, the hydraulic valve system includes a valve body 1, the structure of the valve body 1 is as follows Figure 10 As shown, the inlet pipe joint 8 is installed on the left side of the valve body 1, and the outlet pipe joint 32 is installed on the right side of the valve body 1. A valve sleeve 7 is provided inside the valve body 1. The structure of the valve sleeve 7 is as shown in FIG. Figure 9 As shown; the valve sleeve 7 is provided with a valve core 6, the structure of the valve core 6 is as shown Figure 8 As shown, a spring 9 is provided below the valve sleeve 7 .

[0056] Furthermore, the voice coil motor includes a tile-shaped permanent magnet 2, and the structure of the tile-shaped permanent magnet 2 is as follows: Figure 6 As shown, a coil skeleton 4 is provided inside the tile-type permanent magnet 2, a voice coil motor excitation coil 3 is installed between the tile-type permanent magnet 2 and the coil skeleton 4, a lower magnetic isolation gasket 5 is provided below the tile-type permanent magnet 2, an upper magnetic isolation gasket 35 is provided above the tile-type permanent magnet 2, a magnetic conductive upper cover 36 is installed above the upper magnetic isolation gasket 35, an eddy current displacement sensor 37 is provided inside the magnetic conductive upper cover 36, a connecting screw 34 is connected between the coil skeleton 4 and the eddy current displacement sensor 37, and a connecting nut 33 is provided below the connecting screw 34.

[0057] The present invention also discloses a control method for a high-frequency, high-flow fuel regulating valve. The method uses a voice coil motor to drive a valve sleeve based on a reference signal to adjust the average flow rate. A multi-dimensional discrete magnetostrictive actuator drives a valve core based on a pressure oscillation signal to adjust the high-frequency transient flow rate. A displacement sensor is used to achieve closed-loop control of the valve sleeve position. Multiple independent induction coils with axial discrete distribution sense the internal magnetic induction intensity of the actuator to achieve closed-loop control of the valve core position. A temperature sensor senses the internal temperature of the actuator to achieve thermally induced displacement error compensation. The specific process is as follows:

[0058] Average flow regulation: According to the target flow, the controller sends a control signal to drive the voice coil motor excitation coil, which generates a Lorentz force in the constant magnetic field of the tile-shaped permanent magnet 2 to push the valve sleeve 7. After the force is balanced with the spring 9, a certain valve opening is obtained to achieve average flow regulation.

[0059] Transient flow regulation: Based on the high-frequency combustion oscillation signal, the active controller generates an anti-phase suppression signal to drive the discrete excitation coil 25 of the multi-dimensional discrete magnetostrictive actuator to generate an excitation magnetic field. This, in conjunction with the bias magnetic field generated by the annular permanent magnet 14, drives the magnetostrictive stack to deform, pushing the output rod 29 to generate a high-frequency displacement output, driving the valve core 6 to adjust the valve opening in real time, thus achieving transient flow regulation.

[0060] Thermal error compensation: The temperature sensor 20 senses the temperature in real time, and the controller calculates and generates compensation signals in real time to correct the outputs of the voice coil motor and the multi-dimensional discrete magnetostrictive actuator respectively to achieve thermal error compensation.

[0061] The present invention uses the induction coil 26 to sense the magnetic induction intensity inside the actuator in real time, thereby calculating the movement position of the valve core 6 in real time and realizing position feedback control of the valve core 6 .

[0062] The present invention uses the eddy current displacement sensor 37 to sense the movement position of the valve sleeve 7 in real time, thereby realizing position feedback control of the valve sleeve 7 .

[0063] The present invention uses a temperature sensor 20 to sense the internal temperature of the multi-dimensional discrete magnetostrictive actuator in real time, and uses a controller to calculate the performance degradation degree and thermally induced displacement of the multi-dimensional discrete magnetostrictive actuator in real time, thereby achieving thermally induced error compensation of the fuel regulating valve.

[0064] In the specific control process, the power consumption of the fuel regulating valve is reduced by switching between working mode 1, working mode 2, working mode 3 and working mode 4;

[0065] like Figure 4 As shown, in this embodiment, there are four discrete excitation coils 25; the four discrete excitation coils 25 are coaxially arranged, and from bottom to top are coil I, coil II, coil III, and coil IV;

[0066] When switching to working mode 1, coils I to IV work in sequence, and the order is: ① Coil I works, coils II to IV do not work; ② Coil II works, coils I, III, and IV do not work; ③ Coil III works, coils I, II, and IV do not work; ④ Coil IV works, coils I to III do not work;

[0067] When switching to working mode 2, coils I and III work alternately with coils II and IV. The order is: ① coils I and III work, coils II and IV do not work; ② coils II and IV work, coils I and III do not work;

[0068] When switching to working mode 3, coils I to IV stop working in sequence, and the order is as follows: ① Coil I stops working, and coils II to IV work; ② Coil II stops working, and coils I, III, and IV work; ③ Coil III stops working, and coils I, II, and IV work; ④ Coil IV stops working, and coils I to III work;

[0069] When switching to working mode 4, coil I, coil II, coil III and coil IV work simultaneously.

[0070] As for how to select Mode 1 to Mode 4, the following principles are adopted:

[0071] When the combustion oscillation amplitude is less than 25% of the saturated output capacity of the multi-dimensional discrete magnetostrictive actuator, the actuator intelligently switches to working mode 1; when the combustion oscillation amplitude is 25% to 50% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 2; when the combustion oscillation amplitude is 50% to 75% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 3; when the combustion oscillation amplitude is 75% to 100% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 4.

[0072] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A high-frequency, high-flow fuel regulating valve, characterized by: Includes multi-dimensional discrete magnetostrictive actuators, hydraulic valve systems, and voice coil motors; The multi-dimensional discrete magnetostrictive actuator includes a pre-pressure applying device, a discrete bias magnetic field applying device, an axial discrete electromagnetic excitation device and an axial-radial two-dimensional discrete magnetostrictive stack; The preload applying device comprises an aluminum housing (11), a preload end cover (10) and an anti-twist output rod (29) are installed on the upper end of the aluminum housing (11), a disc spring (30) is installed between the preload end cover (10) and the anti-twist output rod (29), the lower end surface of the disc spring (30) contacts the surface of the anti-twist output rod (29), and the upper end surface of the disc spring (30) contacts the lower surface of the preload end cover (10); The discrete bias magnetic field applying device comprises a magnetic inner shell (12), a magnetic base (16) is installed at the lower end of the aluminum outer shell (11), annular permanent magnets (13) and large magnetic rings (14) are alternately installed between the magnetic inner shell (12) and the magnetic base (16), and a temperature sensor (20) is installed in the magnetic base (16); The axial discrete electromagnetic excitation device comprises a discrete coil frame (15), an axial discrete excitation coil (25) is installed outside the discrete coil frame (15), and an induction coil (26) is installed between the excitation coil (25) and the discrete coil frame (15); The axial-radial two-dimensional discrete magnetostrictive stack comprises four outer annular magnetostrictive rods (17) stacked axially, an outer magnetic ring (27) is installed above the outer annular magnetostrictive rod (17), an outer U-shaped sleeve (18) is installed above the outer magnetic ring (27), a lower magnetic conductor (19) is installed at the lower portion of the outer U-shaped sleeve (18), four inner annular magnetostrictive rods (23) stacked axially are installed above the lower magnetic conductor (19), an inner magnetic ring (28) is provided above the inner annular magnetostrictive rod (23), an inner U-shaped sleeve (22) is installed above the inner magnetic ring (28), an upper magnetic conductor (21) is provided at the lower portion of the inner U-shaped sleeve (22), and four cylindrical magnetostrictive rods (24) stacked axially are installed above the upper magnetic conductor (21); The hydraulic valve system comprises a valve body (1), an inlet pipe joint (8) is installed on one side of the valve body (1), an outlet pipe joint (32) is installed on the other side of the valve body (1), a valve sleeve (7) is arranged inside the valve body (1), a valve core (6) is installed inside the valve sleeve (7), and a spring (9) is arranged below the valve sleeve (7); The voice coil motor comprises a tile-shaped permanent magnet (2), a coil frame (4) is installed inside the tile-shaped permanent magnet (2), a voice coil motor excitation coil (3) is arranged between the tile-shaped permanent magnet (2) and the coil frame (4), a lower magnetic isolation washer (5) is arranged below the tile-shaped permanent magnet (2), an upper magnetic isolation washer (35) is arranged above the tile-shaped permanent magnet (2), a magnetic conductive upper cover (36) is installed above the upper magnetic isolation washer (35), an eddy current displacement sensor (37) is arranged inside the magnetic conductive upper cover (36), a connecting screw (34) is connected between the coil frame (4) and the eddy current displacement sensor (37), and the connecting screw (34) is connected to a connecting nut (33).

2. The high-frequency, high-flow fuel regulating valve according to claim 1, characterized in that: The anti-twist output rod (29) and the valve core (6) are threadedly connected, and the multi-dimensional discrete magnetostrictive actuator drives the valve core (6) through the anti-twist output rod (29) to achieve high-frequency small opening control of the valve port.

3. The high-frequency, high-flow fuel regulating valve according to claim 1, characterized in that: The connecting screw (34), the connecting nut (33) and the valve sleeve (7) are all threadedly connected, and the voice coil motor drives the valve sleeve (7) through the coil skeleton (4) to achieve low-frequency large-opening control of the valve port.

4. The high-frequency, high-flow fuel regulating valve according to claim 1, characterized in that: The magnetic upper cover (36) is threadedly connected to the valve body (1), and the bottom of the magnetic upper cover (36) is in contact with the coil skeleton (4). The magnetic upper cover (36) is rotated to push the coil skeleton (4) to adjust the initial position of the valve sleeve (7) to adjust the valve port covering amount.

5. A control method for a high-frequency, high-flow fuel regulating valve according to any one of claims 1 to 4, characterized in that: Based on the reference signal, the voice coil motor drives the valve sleeve to adjust the average flow rate. Based on the pressure oscillation signal, the multi-dimensional discrete magnetostrictive actuator drives the valve core to adjust the high-frequency transient flow rate. The eddy current displacement sensor is used to achieve closed-loop control of the valve sleeve position. Multiple independent induction coils with axial discrete distribution sense the internal magnetic induction intensity of the actuator to achieve closed-loop control of the valve core position. The temperature sensor senses the internal temperature of the actuator to achieve thermal displacement error compensation. The specific process is as follows: Average flow rate regulation: According to the target flow rate, the controller gives a control signal to drive the voice coil motor excitation coil, which generates a Lorentz force in the constant magnetic field of the tile-shaped permanent magnet (2) to push the valve sleeve (7). After the force is balanced with the spring (9), a certain valve opening is obtained to achieve average flow rate regulation; Transient flow regulation: Based on the high-frequency combustion oscillation signal, the active controller generates an anti-phase suppression signal to drive the discrete excitation coil (25) of the multi-dimensional discrete magnetostrictive actuator to generate an excitation magnetic field, which acts together with the bias magnetic field generated by the annular permanent magnet (13) to drive the magnetostrictive stack to produce deformation, push the anti-twist output rod (29) to generate a high-frequency displacement output, and drive the valve core (6) to adjust the valve opening in real time to achieve transient flow regulation; Thermal error compensation: The temperature sensor (20) senses the temperature in real time, and the controller solves and generates compensation signals in real time to respectively correct the outputs of the voice coil motor and the multi-dimensional discrete magnetostrictive actuator to achieve thermal error compensation.

6. The control method according to claim 5, characterized in that: The magnetic induction intensity inside the actuator is sensed in real time by the induction coil (26), so as to calculate the movement position of the valve core (6) in real time and realize position feedback control of the valve core (6).

7. The control method according to claim 5, characterized in that: The moving position of the valve sleeve (7) is sensed in real time by the eddy current displacement sensor (37), thereby realizing position feedback control of the valve sleeve (7).

8. The control method according to claim 5, characterized in that: The internal temperature of the multi-dimensional discrete magnetostrictive actuator is sensed in real time by a temperature sensor (20), and the performance degradation degree and thermal displacement of the multi-dimensional discrete magnetostrictive actuator are calculated in real time by a controller, thereby realizing thermal error compensation of the fuel regulating valve.

9. The control method according to claim 8, characterized in that: The power consumption of the fuel regulating valve is reduced by switching between working mode 1, working mode 2, working mode 3 and working mode 4; There are four discrete excitation coils (25); the four discrete excitation coils (25) are coaxially arranged and are coil I, coil II, coil III, and coil IV from bottom to top; When switching to working mode 1, coils I to IV work in sequence, and the order is: ① Coil I works, coils II to IV do not work; ② Coil II works, coils I, III, and IV do not work; ③ Coil III works, coils I, II, and IV do not work; ④ Coil IV works, coils I to III do not work; When switching to working mode 2, coils I and III work alternately with coils II and IV. The order is: ① coils I and III work, coils II and IV do not work; ② coils II and IV work, coils I and III do not work; When switching to working mode 3, coils I to IV stop working in sequence, and the order is as follows: ① Coil I stops working, and coils II to IV work; ② Coil II stops working, and coils I, III, and IV work; ③ Coil III stops working, and coils I, II, and IV work; ④ Coil IV stops working, and coils I to III work; When switching to working mode 4, coil I, coil II, coil III and coil IV work simultaneously.

10. The control method according to claim 9, characterized in that: When the combustion oscillation amplitude is less than 25% of the saturated output capacity of the multi-dimensional discrete magnetostrictive actuator, the actuator intelligently switches to working mode 1; when the combustion oscillation amplitude is 25% to 50% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 2; when the combustion oscillation amplitude is 50% to 75% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 3; when the combustion oscillation amplitude is 75% to 100% of the saturated output capacity of the actuator, the actuator intelligently switches to working mode 4.

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