Oil distribution valve for detecting and correcting PID parameters of temperature and pressure of high-pressure cavity
By detecting and correcting the PID parameters of the oil separator valve based on the temperature and pressure of the high-pressure chamber, the problem of the lack of automatic reset and temperature compensation of the oil separator valve is solved, realizing fast and stable PID control and improving the control stability and reliability of the aero-engine fuel regulator.
Patent Information
- Application Number
- CN202511472880.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2026-01-27
AI Technical Summary
The fuel distribution valves of existing aero-engine fuel regulators lack automatic reset functions, temperature compensation, and real-time PID parameter adjustment capabilities, resulting in insufficient control stability and reliability.
An oil separator valve was designed to detect and correct PID parameters based on the temperature and pressure of the high-pressure chamber. Data is collected by temperature, pressure and differential pressure sensors, and PID closed-loop control is used to achieve automatic temperature compensation and rapid stabilization, thus shortening the valve core stabilization time.
It improves the control stability and system reliability of the oil distribution valve, meeting the technical requirements of modern aero-engine electronic control systems.
Smart Images
Figure CN121408296A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of aero-engine technology and relates to an oil distribution valve of an aero-engine fuel regulator, specifically an oil distribution valve that detects and corrects PID parameters for high-pressure chamber temperature and pressure. Background Technology
[0002] A key development trend in aero-engine fuel control systems is the shift from traditional mechanical-hydraulic control to a fully electronic and digital control system. The digitalization of avionics control systems is an inevitable development. Aero-engine control systems are highly complex, composed of numerous intricate subsystems and sub-subsystems. These systems require the control of electro-hydraulic conversion elements, including oil distribution valves.
[0003] Oil separator valves are widely used due to their simple structure, concise control principle, good linearity, fast response speed, and ease of control.
[0004] The fuel distribution valves currently used in aircraft engine fuel regulators have the following disadvantages: 1. The oil separator valve does not have an automatic reset function.
[0005] 2. The oil separator valve does not have a temperature compensation function.
[0006] 3. The stabilization time of the oil separator valve core is relatively long.
[0007] When performing PID control, the PID parameters cannot be adjusted in real time according to changes in temperature and pressure, which may cause the target control to diverge and oscillate.
[0008] These shortcomings increase the burden on the engine fuel electronic control system, reduce system reliability and stability, and fail to meet the technical requirements of modern aero-engine electronic control systems. Summary of the Invention
[0009] To address the aforementioned issues, this invention provides an oil separator valve that detects and corrects PID parameters based on the temperature and pressure of the high-pressure chamber. By utilizing the oil separator valve for PID control, automatic temperature compensation is provided for the fuel regulator of the aero-engine, shortening the stabilization time of the oil separator valve core.
[0010] The technical solution of the present invention is as follows: An oil distribution valve for detecting and correcting PID parameters based on the temperature and pressure of a high-pressure chamber includes a valve body, an oil distribution valve, and an actuator (A115). A linear displacement sensor (A100) is located on the left side of the valve body, and a control chamber (A111) is located on the right side of the valve body. The large end (A113) of the oil distribution valve is located to the left of the control chamber (A111), and constant pressure oil (A107) flows through the left side of the control chamber (A111). The small end (A117) of the oil distribution valve is located to the left of the constant pressure oil (A107). The left end of the small end (A117) of the oil distribution valve is connected to the linear displacement sensor (A100) via a return spring. A return oil chamber and a high-pressure chamber are provided between the small end (A117) of the oil distribution valve and the valve body, wherein the high-pressure chamber is located in the middle of the axial direction. The return oil chambers are located on both sides of the axial direction. The right side connected to the high-pressure chamber is the C2 rod chamber (A105), which is connected to the rod chamber (A116) of the actuator (A115). The left side connected to the high-pressure chamber is the C3 rodless chamber (A103), which is connected to the rodless chamber (A114) of the actuator (A115). It also includes a differential pressure sensor (A112), which measures the pressure difference between the control chamber (A111) and the constant pressure oil (A107). It also includes a temperature sensor (A101) and a pressure sensor (A118), which are connected to and measure the high-pressure chamber.
[0011] Furthermore, the small end (A117) of the oil distributor is provided with a cap at the corresponding position of the rod chamber (A105) of C2 and the rodless chamber (A103) of C3; when the small end (A117) of the oil distributor is in the left position, the rodless chamber (A103) of C3 is connected to the high-pressure chamber, and the rod chamber (A105) of C2 is connected to the return oil chamber; when the small end (A117) of the oil distributor is in the right position, the rodless chamber (A103) of C3 is connected to the return oil chamber, and the rod chamber (A105) of C2 is connected to the high-pressure chamber.
[0012] Furthermore, the oil separator valve is subjected to PID closed-loop control by acquiring data from the temperature sensor (A101), pressure sensor (A118), and differential pressure sensor (A112).
[0013] Furthermore, the PID integral parameters in PID closed-loop control are: I1 = I2 * ((1 + A1 * (π * T + A2) / (Tc + T0))) + (1 + A3 / π * P * P - 0.01 * P + A4))), where I1 is the integral coefficient of the closed-loop control of the oil separator valve, I2 is the integral coefficient without temperature and pressure input, A1, A2, A3 and A4 are engineering experience coefficients, T is the current actual temperature of the high-pressure chamber, Tc is the ambient temperature value, T0 is the absolute zero value, and P is the current actual pressure of the high-pressure chamber; D1=D2*(1+B1 / (P*P+B2*P+B3)), where D1 is the differential coefficient of the closed-loop control of the oil separator valve, D2 is the differential coefficient without temperature and pressure input, B1, B2 and B3 are engineering experience coefficients, and P is the actual value of the differential pressure sensor.
[0014] Furthermore, A1 is 0.03118, A2 is 0.01258, A3 is 0.00918, A4 is 0.002147, B1 is 0.0035, B2 is 3, and B3 is 0.01.
[0015] Furthermore, the linear displacement sensor (A100) obtains the displacement of the small end (A117) of the oil distributor valve (A117) through the linear displacement sensor core (A119) extending to the small end (A117) of the oil distributor valve, and uses it as a feedback signal for position control.
[0016] Furthermore, the pressure in the return oil chambers on both sides of the small end (A117) of the oil distribution valve is equal.
[0017] Furthermore, the control chamber (A111) is connected to the low-pressure oil passage (A109) through a high-speed solenoid valve (A108), and the output flow of the high-speed solenoid valve (A108) is controlled by a pulse width modulation signal to adjust the pressure of the control chamber (A111).
[0018] Furthermore, the left and right movement of the oil distributor valve is jointly determined by the pressure of the constant pressure oil (A107), the force-bearing area of the large end (A113) of the oil distributor valve, and the pressure of the control chamber (A111). The constant pressure oil pressure * the force-bearing area of the large end of the oil distributor valve on the constant pressure oil side = the control chamber pressure * the force-bearing area of the large end of the oil distributor valve on the control chamber side. There is an area difference between the left and right sides of the large end (A113) of the oil distributor valve.
[0019] The beneficial effects of this application are as follows: 1. This invention utilizes the PID parameter correction principle to achieve the function of correcting the PID parameters of the oil separator valve by sampling the pressure and temperature of the high-pressure chamber, thus solving the problem of poor control stability of the oil separator valve.
[0020] 2. Based on PID parameter design, this invention achieves the technical effect of increasing the stability of the oil separator valve control in feedback control. Attached Figure Description
[0021] Figure 1 This is a block diagram of an oil separator valve for detecting and correcting PID parameters of the high-pressure chamber temperature and pressure according to the present invention. Figure 2 This invention relates to an oil separator valve assembly diagram for detecting and correcting PID parameters of the high-pressure chamber temperature and pressure.
[0022] In the diagram: A100—Linear displacement sensor, A101—Temperature sensor, A102—Return oil chamber, A103—C3 rodless chamber, A104—C1 high-pressure chamber, A105—C2 rod chamber, A106—Return oil chamber, A107—Constant pressure oil, A108—High-speed solenoid valve, A109—Return oil chamber, A110—Return oil chamber, A111—Control chamber, A112—Differential pressure sensor, A113—Large end of oil distributor valve, A114—Rodless chamber of actuator cylinder, A115—Actuator cylinder, A116—Rod chamber of actuator cylinder, A117—Small end of oil distributor valve, A118—Pressure sensor, A119—Linear displacement sensor core. Detailed Implementation
[0023] This section describes embodiments of the present invention, used to explain and illustrate the technical solutions of the present invention. Unless otherwise specified, the embodiments and features described herein can be combined with each other.
[0024] 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 directions or positional relationships, are based on the orientation or positional relationships in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or case 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 of the 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 implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include more than one of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0025] 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 fixed connections, detachable connections, or integrated connections; they can refer to mechanical connections or point connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0026] Example 1: An oil distributor valve for detecting and correcting PID parameters based on the temperature and pressure of a high-pressure chamber includes a valve body, an oil distributor valve, and an actuator cylinder A115. A linear displacement sensor A100 is located on the left side of the valve body, and a control chamber A111 is located on the right side of the valve body. The large end A113 of the oil distributor valve is located to the left of the control chamber A111. A constant pressure oil A107 flows through the left side of the control chamber A111. The small end A117 of the oil distributor valve is located to the left of the constant pressure oil A107. The left end of the small end A117 is connected to the linear displacement sensor A100 via a return spring. A return oil chamber and a high-pressure chamber are provided between the small end A117 of the oil distributor valve and the valve body, wherein the high-pressure chamber is located on the shaft. To the center, the return oil chambers are located on both sides of the axial direction. The right side connected to the high-pressure chamber is C2 rod chamber A105, which is connected to the rod chamber A116 of the actuator A115. The left side connected to the high-pressure chamber is C3 rodless chamber A103, which is connected to the rodless chamber A114 of the actuator A115. It also includes a differential pressure sensor A112, which measures the pressure difference between the control chamber A111 and the constant pressure oil A107. It also includes a temperature sensor A101 and a pressure sensor A118, which are connected to and measure the high-pressure chamber.
[0027] Furthermore, the small end A117 of the oil distributor is provided with a cover corresponding to the rod chamber A105 of C2 and the rodless chamber A103 of C3; when the small end A117 of the oil distributor is in the left position, the rodless chamber A103 of C3 is connected to the high-pressure chamber, and the rod chamber A105 of C2 is connected to the return oil chamber; when the small end A117 of the oil distributor is in the right position, the rodless chamber A103 of C3 is connected to the return oil chamber, and the rod chamber A105 of C2 is connected to the high-pressure chamber.
[0028] Furthermore, the oil separator valve is subjected to PID closed-loop control by acquiring data from temperature sensor A101, pressure sensor A118, and differential pressure sensor A112.
[0029] Furthermore, the PID integral parameters in PID closed-loop control are: I1 = I2 * ((1 + A1 * (π * T + A2) / (Tc + T0))) + (1 + A3 / π * P * P - 0.01 * P + A4))), where I1 is the integral coefficient of the closed-loop control of the oil separator valve, I2 is the integral coefficient without temperature and pressure input, A1, A2, A3 and A4 are engineering experience coefficients, T is the current actual temperature of the high-pressure chamber, Tc is the ambient temperature value, T0 is the absolute zero value, and P is the current actual pressure of the high-pressure chamber; D1=D2*(1+B1 / (P*P+B2*P+B3)), where D1 is the differential coefficient of the closed-loop control of the oil separator valve, D2 is the differential coefficient without temperature and pressure input, B1, B2 and B3 are engineering experience coefficients, and P is the actual value of the differential pressure sensor.
[0030] Furthermore, A1 is 0.03118, A2 is 0.01258, A3 is 0.00918, A4 is 0.002147, B1 is 0.0035, B2 is 3, and B3 is 0.01.
[0031] Furthermore, the linear displacement sensor A100 obtains the displacement of the small end A117 of the oil distributor valve through the linear displacement sensor core A119 extending to the small end A117 of the oil distributor valve, and uses it as a feedback signal for position control.
[0032] Furthermore, the pressure in the return oil chambers on both sides of the small end A117 of the oil distribution valve is equal.
[0033] Furthermore, the control chamber A111 is connected to the low-pressure oil channel A109 via the high-speed solenoid valve A108, and the output flow of the high-speed solenoid valve A108 is controlled by the pulse width modulation signal to adjust the pressure of the control chamber A111.
[0034] Furthermore, the left and right movement of the oil distributor valve is jointly determined by the pressure of the constant pressure oil A107, the force-bearing area of the large end A113 of the oil distributor valve, and the pressure of the control chamber A111. Among them, the constant pressure oil pressure * the force-bearing area of the large end of the oil distributor valve on the constant pressure oil side = the control chamber pressure * the force-bearing area of the large end of the oil distributor valve on the control chamber side. There is an area difference between the left and right sides of the large end A113 of the oil distributor valve.
[0035] Example 2: The present invention comprises: A100 linear displacement sensor, A101 temperature sensor, A102 low-pressure oil circuit (also called return oil chamber), A103 C3 rodless chamber, A104 C1 high-pressure oil inlet (also called high-pressure chamber), A105 C2 rod chamber, A106 low-pressure oil circuit (also called return oil chamber), A107 constant pressure oil, A108 high-speed solenoid valve, A109 low-pressure oil circuit (also called return oil chamber), A110 low-pressure oil circuit (also called return oil chamber), A111 control chamber, A112 differential pressure sensor, A113 large end of oil distributor valve, A114 rodless chamber of actuator cylinder, A115 actuator cylinder, A116 rod chamber of actuator cylinder, A117 small end of oil distributor valve, A118 pressure sensor, and A119 linear displacement sensor core, etc.
[0036] In the oil separator valve described in this invention, which detects and corrects PID parameters for high-pressure chamber temperature and pressure: 1. A100 linear displacement sensor: In this invention, its function is to sense the movement distance of the oil separator valve and convert the distance signal into an electrical signal output. The A100 linear displacement sensor detects the displacement of the oil separator valve as a feedback signal for position control.
[0037] 2. A101 Temperature Sensor: Sensing the temperature of the high-pressure oil circuit. The higher the temperature of the high-pressure oil circuit, the greater the viscosity of the oil, the greater the motion damping of the oil distributor valve, and the easier it is for the oil distributor valve to stabilize during closed-loop control. The higher the temperature, the shorter the stabilization time; the lower the temperature, the longer the stabilization time. In the closed-loop control of the oil distributor valve, the integral of the high-pressure chamber temperature and the PID coefficient has the following mathematical relationship: I1=I2*(1+0.03118*(3.14*T+0.01258) / (25+273)). Where I1 is the integral coefficient of the closed-loop control of the oil distributor valve, I2 is a commonly used integral coefficient, 0.01157 is an engineering experience coefficient, T is the current actual temperature of the high-pressure chamber, 25 is the ambient temperature value, and 273 is the absolute zero value.
[0038] 3. A102 connects to the low-pressure oil circuit: also called the low-pressure chamber: the low-pressure chamber in the aircraft generator control system, is the low-pressure oil outlet of the oil distributor valve. The pressure at A102 is equal to the pressure at A106. Since the piston inside the oil distributor valve has the same area at A102 and A106, the forces acting on the piston at A102 and A106 are in equilibrium.
[0039] 4. A103C3 Rodless Chamber: In aircraft generator control systems, the oil separator valve is typically used for position control, and the actuator is usually the control unit. The actuator has two chambers: a rodless chamber (exiting when the rod is raised) and a rod chamber (exiting when the rod is raised). The A103C3 rodless chamber is the rodless chamber. Depending on control requirements, the rodless and rod chambers may move towards either the rod chamber or the rodless chamber.
[0040] 5. A104C1 High-pressure oil inlet: also called high-pressure chamber: is the energy source for driving the actuator cylinder. The direction of movement of the actuator cylinder is controlled by controlling the differential pressure between the rodless chamber (A103C3) and the rod chamber (A105C2).
[0041] 6. A105C2 Rod-type Chamber: In aircraft generator control systems, the oil separator valve is typically used for position control, and the actuator is usually the control unit. The actuator has two chambers: a rodless chamber (raised when there is no rod) and a rod-type chamber (raised when there is a rod). The A105C2 has a rodless chamber. Depending on control requirements, the rodless and rod-type chambers may move towards either the rod-type or rodless chamber.
[0042] 7. A106 connects to the low-pressure oil circuit: also called the return oil chamber: the low-pressure chamber in the aircraft generator control system, which is the low-pressure oil outlet of the oil distributor valve. The pressure of A102 is equal to that of A106. Since the piston inside the oil distributor valve has the same area at A102 and A106, the forces acting on the piston at A102 and A106 are in equilibrium.
[0043] 8. A107 Constant Pressure Oil: The movement of the distributor valve is determined by the constant pressure chamber pressure, the distributor valve's contact area within the constant pressure chamber, the control chamber pressure, and the control chamber's contact area. When the distributor valve forces are balanced, the following mathematical relationship holds: Constant pressure chamber pressure * constant pressure chamber distributor valve contact area = control chamber pressure * control chamber contact area. Without changing the structural area, changing the relative magnitude of the constant pressure chamber pressure or the control chamber pressure will control the distributor valve to move left or right. With a fixed structure and constant constant pressure chamber pressure, changing the control chamber pressure will control the distributor valve to move left or right. In this invention, A107 constant pressure oil is a fixed pressure value.
[0044] 9. A108 High-Speed Solenoid Valve: The working principle of the A108 high-speed solenoid valve is that the output flow rate is directly related to the duty cycle of the A108 high-speed solenoid valve. In this invention, the output flow rate of the A108 high-speed solenoid valve is controlled by a pulse width modulation signal. By changing the duty cycle of the pulse width modulation signal, the output flow rate of the A108 high-speed solenoid valve is controlled, thereby controlling the pressure in the control chamber.
[0045] 10. A109 connects to the low-pressure oil circuit: also called the return oil chamber, the low-pressure chamber in the aircraft generator control system, which serves as the oil outlet of the high-speed solenoid valve.
[0046] 11. A110 is connected to the low-pressure oil circuit: also called the return oil chamber, which is the low-pressure and high-pressure chamber in the aircraft generator control system. In this invention, A110 is connected to the low-pressure oil circuit: also called the return oil chamber, which serves as a fixed oil outlet of the A111 control chamber, and the oil outlet is connected to the low-pressure chamber.
[0047] 12. A111 Control Chamber: The movement of the oil distributor valve is determined by the pressure of the constant pressure chamber, the force-bearing area of the constant pressure chamber oil distributor valve, the pressure of the control chamber, and the force-bearing area of the control chamber. When the oil distributor valve forces are balanced, the following mathematical relationship exists: Constant pressure chamber pressure * Constant pressure chamber oil distributor valve force-bearing area = Control chamber pressure * Control chamber force-bearing area. Without changing the structural area, changing the relative magnitude of the constant pressure chamber pressure or the control chamber pressure will control the oil distributor valve to move left or right. With a fixed structure and constant constant pressure chamber pressure, changing the control chamber pressure will control the oil distributor valve to move left or right. In the closed-loop control system of the oil distributor valve, in this invention, the A111 control chamber represents a relatively variable value.
[0048] 13. A112 Differential Pressure Sensor: In this invention, the A112 differential pressure sensor senses the pressure difference between the A107 constant pressure oil and the A111 control chamber. The direction of the pressure difference corresponds to the movement direction of the oil distributor valve. Because the pressure change is real-time, the response is fast. In the closed-loop control system of the oil distributor valve, the differential pressure sensor in this part corresponds to the differential parameters of the closed-loop control. The mathematical relationship in the A112 differential pressure sensor is: D = D * (1 + 0.0035 / (P * P + 3 * P + 0.01)). Where D is the differential coefficient of the closed-loop control of the oil distributor valve, 0.0035 is an empirical coefficient, P is the actual value of the differential pressure sensor, and 3 and 0.01 are empirical coefficients.
[0049] 14. A113 oil distributor valve large end: The left and right ends of the A113 oil distributor valve form an area difference. Usually, the side with the smaller area and the constant pressure oil form the constant pressure chamber pressure of the oil distributor valve. The side with the larger area and the control chamber pressure of the A113 oil distributor valve large end usually form the constant pressure chamber pressure of the oil distributor valve.
[0050] 15. A114 Actuator Rodless Chamber: In aircraft generator control systems, the oil distribution valve is typically used for position control, and the actuator is usually the carrier for this control. The actuator has two chambers: a rodless chamber for rodless operation and a rod chamber for rod operation. Examples include the A103C3 rodless chamber and the A114 actuator rodless chamber.
[0051] 16. A115 Actuator: The object controlled by the oil distributor valve. While maintaining a constant pressure in the pressure chamber, the movement of the actuator is controlled by adjusting the pressure in the control chamber of the oil distributor valve.
[0052] 17. A116 Actuator Rod-Mounted Chamber: In aircraft generator control systems, the throttle valve is typically used for position control, and the actuator is usually the carrier for this control. The actuator has two chambers: a rodless chamber for rodless operation and a rod-mounted chamber for rod-mounted operation. The A105C2 has both a rodless chamber and the A116 actuator rod-mounted chamber.
[0053] 18. Small end of A117 oil distributor valve: The small end of A117 oil distributor valve is rigidly connected to a linear displacement sensor. When the oil distributor valve moves, the iron core of the linear displacement sensor will move, thus converting the valve's movement into the movement of the linear displacement sensor's iron core.
[0054] 19. A118 Pressure Sensor: Sensing the pressure of the high-pressure oil circuit. The higher the pressure in the high-pressure oil circuit, the greater the motion damping of the distributor valve, and the shorter the settling time of the distributor valve during closed-loop control. The lower the pressure in the high-pressure oil circuit, the smaller the motion damping of the distributor valve, and the longer the settling time required for the distributor valve during closed-loop control. In the closed-loop control of the distributor valve, the high-pressure chamber pressure and the integral in the PID coefficients have the following mathematical relationship: I1 = I2 * (1 + 0.00918 / (3.14 * P * P - 0.01 * P + 0.002147)). Where I is the integral coefficient of the closed-loop control of the oil distribution valve, 0.00918 is the engineering experience coefficient, and P is the current actual pressure of the high-pressure chamber.
[0055] 20. A119 Linear Displacement Sensor Core: The A119 linear displacement sensor core is used to connect the oil distribution valve, thereby enabling the oil distribution valve and the linear displacement sensor core to move synchronously in real time.
[0056] 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. An oil separator valve for detecting and correcting PID parameters based on the temperature and pressure of a high-pressure chamber, characterized in that, The valve includes a valve body, a distributor valve, and an actuator (A115). A linear displacement sensor (A100) is located on the left side of the valve body, and a control chamber (A111) is located on the right side. The large end (A113) of the distributor valve is located to the left of the control chamber (A111). Constant pressure oil (A107) flows through the left side of the control chamber (A111), and the small end (A117) of the distributor valve is located to the left of the constant pressure oil (A107). The left end of the small end (A117) is connected to the linear displacement sensor (A100) via a return spring. A return oil chamber and a high-pressure chamber are located between the small end (A117) of the distributor valve and the valve body. The high-pressure chamber is located in the middle of the axial direction, and the return oil chambers are located on both sides of the axial direction. The right side of the connection is C2 rod chamber (A105), which is connected to the rod chamber (A116) of the actuator (A115). The left side of the high-pressure chamber is C3 rodless chamber (A103), which is connected to the rodless chamber (A114) of the actuator (A115). It also includes a differential pressure sensor (A112), which measures the pressure difference between the control chamber (A111) and the constant pressure oil (A107). It also includes a temperature sensor (A101) and a pressure sensor (A118), which are connected to and measure the high-pressure chamber.
2. The oil separator valve for detecting and correcting PID parameters of high-pressure chamber temperature and pressure according to claim 1, characterized in that, The small end (A117) of the oil distributor valve is covered at the corresponding positions of the rod chamber (A105) of C2 and the rodless chamber (A103) of C3. When the small end (A117) of the oil distributor valve is in the left position, the rodless chamber (A103) of C3 is connected to the high-pressure chamber, and the rod chamber (A105) of C2 is connected to the return oil chamber. When the small end (A117) of the oil distributor valve is in the right position, the rodless chamber (A103) of C3 is connected to the return oil chamber, and the rod chamber (A105) of C2 is connected to the high-pressure chamber.
3. The oil separator valve for detecting and correcting PID parameters of high-pressure chamber temperature and pressure according to claim 1, characterized in that, Data is collected from temperature sensor (A101), pressure sensor (A118), and differential pressure sensor (A112) to perform PID closed-loop control on the oil separator valve.
4. The oil separator valve for detecting and correcting PID parameters of high-pressure chamber temperature and pressure according to claim 3, characterized in that, The integral parameter of the PID in PID closed-loop control is: I1 = I2 * ((1 + A1 * (π * T + A2) / (Tc + T0))) + (1 + A3 / π * P * P - 0.01 * P + A4))), where I1 is the integral coefficient of the closed-loop control of the oil separator valve, I2 is the integral coefficient without temperature and pressure input, A1, A2, A3 and A4 are engineering experience coefficients, T is the current actual temperature of the high-pressure chamber, Tc is the ambient temperature value, T0 is the absolute zero value, and P is the current actual pressure of the high-pressure chamber; D1=D2*(1+B1 / (P*P+B2*P+B3)), where D1 is the differential coefficient of the closed-loop control of the oil separator valve, D2 is the differential coefficient without temperature and pressure input, B1, B2 and B3 are engineering experience coefficients, and P is the actual value of the differential pressure sensor.
5. The oil separator valve for detecting and correcting PID parameters of high-pressure chamber temperature and pressure according to claim 4, characterized in that, A1 is 0.03118, A2 is 0.01258, A3 is 0.00918, A4 is 0.002147, B1 is 0.0035, B2 is 3, and B3 is 0.
01.
6. The oil separator valve for detecting and correcting PID parameters of high-pressure chamber temperature and pressure according to claim 1, characterized in that, The linear displacement sensor (A100) obtains the displacement of the small end (A117) of the oil distributor valve (A117) through the linear displacement sensor core (A119) extending to the small end (A117) of the oil distributor valve, and uses it as a feedback signal for position control.
7. The oil separator valve for detecting and correcting PID parameters of high-pressure chamber temperature and pressure according to claim 1, characterized in that, The pressure in the return oil chambers on both sides of the small end (A117) of the oil separator valve is equal.
8. The oil separator valve for detecting and correcting PID parameters of high-pressure chamber temperature and pressure according to claim 1, characterized in that, The control chamber (A111) is connected to the low-pressure oil passage (A109) through a high-speed solenoid valve (A108). The output flow of the high-speed solenoid valve (A108) is controlled by a pulse width modulation signal to adjust the pressure of the control chamber (A111).
9. The oil separator valve for detecting and correcting PID parameters of high-pressure chamber temperature and pressure according to claim 1, characterized in that, The left and right movement of the oil distributor valve is determined by the pressure of the constant pressure oil (A107), the force-bearing area of the large end of the oil distributor valve (A113), and the pressure of the control chamber (A111). The constant pressure oil pressure * the force-bearing area of the large end of the oil distributor valve on the constant pressure oil side = the control chamber pressure * the force-bearing area of the large end of the oil distributor valve on the control chamber side. There is an area difference between the left and right sides of the large end of the oil distributor valve (A113).