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WO2024066127A1 - Soupape d'étranglement numérique du type à cartouche à base d'eau, à haute pression et à grand débit et procédé de commande - Google Patents

Soupape d'étranglement numérique du type à cartouche à base d'eau, à haute pression et à grand débit et procédé de commande Download PDF

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Publication number
WO2024066127A1
WO2024066127A1 PCT/CN2022/144410 CN2022144410W WO2024066127A1 WO 2024066127 A1 WO2024066127 A1 WO 2024066127A1 CN 2022144410 W CN2022144410 W CN 2022144410W WO 2024066127 A1 WO2024066127 A1 WO 2024066127A1
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WO
WIPO (PCT)
Prior art keywords
valve
pilot
main valve
main
core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/144410
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English (en)
Chinese (zh)
Inventor
赵继云
王浩
曹超
王云飞
黄笛
韩静
张鹤
李冉
夏智禹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
Original Assignee
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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Application filed by China University of Mining and Technology CUMT, China University of Mining and Technology Beijing CUMTB filed Critical China University of Mining and Technology CUMT
Publication of WO2024066127A1 publication Critical patent/WO2024066127A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
    • F16K31/383—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston

Definitions

  • the invention relates to a high-pressure, large-flow, high-water-based plug-in digital throttle valve and a control method thereof, belonging to the field of hydraulic components.
  • the motor-driven plug-in flow servo valve (CN103291678B) can meet the needs of high pressure and large flow, but because its pilot is a slide valve, it will cause serious leakage under pure water conditions;
  • the plug-in water pressure digital throttle valve (CN114593100A) with independent load port control uses a stepper motor plus a ball screw as a drive, which leads to a complex structure, the introduction of more nonlinear factors, and dead zones and zero drift caused by friction and wear.
  • the flow valve in the prior art has problems with the pilot part and the problem of driving the pilot part.
  • the present application uses a high-speed switching valve to drive two two-position two-way ball valves as a pilot, and proposes a high-pressure, large-flow, high-water-base digital throttle valve.
  • the valve not only has a simple structure, small leakage, and strong anti-pollution ability, but also can well meet the working conditions of high pressure, large flow, and high water base.
  • the present invention provides a high-pressure, high-flow, high-water-based plug-in digital throttle valve and a control method, which has a simple structure, small leakage, rapid response and strong anti-pollution ability, and can meet the working conditions of high pressure and high flow.
  • a high-pressure, large-flow, high-water-based plug-in digital throttle valve comprises a main valve and a pilot valve, wherein the main valve comprises a main valve core and a main valve seat, wherein the main valve core is embedded in the main valve seat, and the two are coaxially arranged; a flow channel c is provided on the central axis of the main valve core, a main valve core damping hole is installed near the inlet of the main valve core of the flow channel c, and a main valve push rod is installed at the outlet of the flow channel c, that is, one end of the main valve push rod is connected to the top of the main valve core, and the other end of the main valve push rod is covered with a main valve spring adjusting nut, and a main valve spring is sleeved on the main valve push rod located between the main valve spring adjusting nut and the top of the main valve core;
  • the circumferential wall near the top of the main valve core protrudes outward to form a boss, which divides the chamber between the main valve core and the main valve seat from the inlet of the flow channel c to the outlet of the flow channel c into the main valve control lower chamber and the main valve control upper chamber.
  • the high water base liquid flows from the inlet of the main valve core through the damping hole of the main valve core, the flow channel c and the main valve push rod into the main valve upper chamber to achieve pressure balance with the main valve core;
  • the pilot valve body is connected to the main valve.
  • the pilot valve controls the pressure of the main valve control lower chamber to overcome the main valve spring force, thereby controlling the axial displacement of the main valve core in the main valve seat to achieve the adjustment of the output flow of the main valve.
  • a groove is provided in the portion of the main valve spring adjusting nut facing the other end of the main valve push rod, and the other end of the main valve push rod is embedded in the groove.
  • a main valve core displacement sensor is also arranged between the other end of the main valve push rod and the groove, and the main valve core displacement sensor is connected to the main valve spring adjusting nut through a thread; one end of the main valve push rod is connected to the top of the main valve core through a thread;
  • the pilot valve comprises two two-position two-way cartridge ball valves with the same structure, namely a pilot valve I and a pilot valve II, and the pilot valve I and the pilot valve II are inserted into the pilot valve body by threads;
  • the pilot valve I or pilot valve II includes a coaxially arranged high-speed on-off valve, an upper pilot valve core, an upper pilot valve spring, a ball valve seat, a ball valve core, a ball valve reset seat, a ball valve reset spring, a pilot cartridge valve body and a pilot valve screw plug;
  • the upper pilot valve core is coaxially installed in the pilot cartridge valve body.
  • the ball valve seat and the pilot valve screw plug are connected to the pilot cartridge valve body through threads.
  • a boss is coaxially arranged at the bottom of the ball valve reset seat, and a ball valve reset spring is embedded in the boss.
  • the ball valve reset spring and the boss are coaxially arranged.
  • the ball valve reset seat can be slidably installed on the top of the pilot valve screw plug.
  • the ball valve core is installed on the top of the ball valve reset seat, and the ball valve core can roll on the top of the ball valve reset seat.
  • the ball valve reset seat is pressed against the conical surface of the ball valve seat under the action of the ball valve reset spring to form a line seal.
  • the space where the ball valve seat, the ball valve core, the ball valve reset seat and the pilot valve screw plug are located forms a pilot oil inlet chamber
  • a trapezoidal groove is provided on the top of the ball valve reset seat, and the ball valve core is embedded in the trapezoidal groove;
  • the middle circumferential wall of the upper pilot valve core protrudes outward to form an annular platform
  • the diameter of the annular platform is larger than the diameter of the central hole of the pilot cartridge valve body
  • one end of the upper pilot valve spring is sleeved by the bottom end of the upper pilot valve core, that is, the top end of the upper pilot valve spring is in contact with the bottom surface of the annular platform of the upper pilot valve core, and the other end of the upper pilot valve spring is in contact with the top of the ball valve seat;
  • the space where the upper pilot valve core and the upper pilot valve spring are located forms a main valve control chamber
  • the space between the top of the upper pilot valve core and the pilot cartridge valve body forms a pilot control chamber
  • a high-speed switch valve is installed on the top of the pilot cartridge valve body, and the oil inlet of the high-speed switch valve is connected to the pilot control chamber;
  • the pilot oil inlet port of the pilot valve II is connected to the pilot oil inlet chamber of the pilot valve II through the flow channel e;
  • the main valve control chamber of the pilot valve II is connected to one end of the flow channel d, while the other end of the flow channel d is connected to the oil inlet chamber of the pilot valve I;
  • the pilot control chamber is connected to the pilot oil inlet chamber through the pilot damping hole I and the flow channel i; in the pilot valve I, the pilot control chamber is connected to the pilot oil inlet chamber of the pilot valve II through the flow channel h, the pilot damping hole II and the flow channel j;
  • the main valve control chamber of pilot valve II is connected to the main valve control lower chamber through flow channel a; one end of the main valve control chamber of pilot valve I is connected to the main valve control upper chamber through flow channel b, and the other end is connected to the pilot oil return port through flow channel f;
  • the oil return port of the pilot valve I high-speed switch valve and the oil return port of the pilot valve II high-speed switch valve are connected to the pilot oil return port of the pilot valve through the flow channel g and the flow channel f in sequence;
  • a control method based on the high-pressure, high-flow, high-water-based plug-in digital throttle valve when the digital throttle valve is in a no-flow output state, the high-speed switch valves of the pilot valve I and the pilot valve II are normally open, the high-water-based emulsion in the pilot control chamber flows back to the emulsion tank through the high-speed switch valve, the ball valve core is pressed against the ball valve seat under the action of the ball valve return spring, and the pilot valve I and the pilot valve II are in a closed state;
  • the pressures of the main valve control upper chamber and the main valve control lower chamber are both zero, the main valve core fits the main valve seat under the action of the main valve spring, and the displacement of the main valve core is zero;
  • the displacement of the main valve core opening is calculated according to the relationship between the valve port flow and displacement, and the displacement signal is converted into a duty cycle signal of the high-speed switch valves of pilot valves I and II.
  • the pressure of the pilot control chambers of pilot valves I and II is controlled by controlling the proportion of the switch time in a single cycle of the high-speed switch valves. Under the action of the pilot control chamber pressure, the upper pilot valve core moves along the central axis toward the ball valve core, pushing the ball valve core open.
  • the emulsion flows from the pilot oil inlet chamber of pilot valve II through the main valve control chamber, and a part of it flows into the main valve control lower chamber, and the other part flows back to the pilot oil return port through flow channel d, the pilot oil inlet chamber of pilot valve I, the main valve control chamber, and flow channel f, that is, back to the emulsion tank;
  • the amount of emulsion flowing into the lower control chamber of the main valve is controlled by controlling the duty ratio of the high-speed switch valve of the pilot valve II, and the amount of emulsion flowing out of the lower control chamber of the main valve is controlled by controlling the duty ratio of the high-speed switch valve of the pilot valve I.
  • the amount of emulsion actually flowing into the lower control chamber of the matching main valve is controlled by controlling the duty ratio of the two high-speed switch valves respectively, thereby controlling the pressure of the lower control chamber of the matching main valve. Under the action of the pressure, the main valve core moves along the central axis toward the main valve push rod.
  • the main valve core displacement signal measured by the main valve core displacement sensor is compared with the expected main valve core displacement signal, and the error signal is input into the controller to accurately control the displacement of the main valve core;
  • the duty ratio of the high-speed switch valve of pilot valve I and pilot valve II is changed respectively, and the opening of the ball valve core of pilot valve I and pilot valve II is adjusted, thereby controlling the pressure of the lower chamber of the main valve, so that the main valve core moves along the central axial direction, thereby achieving the purpose of controlling the displacement of the main valve.
  • the present invention has the following beneficial effects:
  • the high-pressure, high-flow, high-water-base plug-in digital throttle valve provided by the present invention has a main valve of a cone valve structure, and a pilot valve and a high-speed switch valve are both ball valve structures, which can be well sealed in high-water-base or pure water media without leakage;
  • the high-pressure, high-flow, high-water-based plug-in digital throttle valve provided by the present invention adopts a high-speed switch valve as a drive, is cheap, has a large pilot output force, does not require the introduction of mechanical structures such as levers or ball screws, and avoids the introduction of more nonlinear factors and zero drift caused by friction and wear.
  • the high-pressure, high-flow, high-water-based plug-in digital throttle valve provided by the present invention has a main valve, a pilot valve and a pilot valve drive all adopting a plug-in structure, with a large output flow, a compact structure, good sealing and easy installation;
  • the high-pressure, high-flow, high-water-based plug-in digital throttle valve provided by the present invention has a two-position, two-way valve as its pilot valve, which is simple in structure, easy to process and assemble, has a simple control algorithm, and is low in cost;
  • the high-pressure, high-flow, high-water-based plug-in digital throttle valve provided by the present invention adopts two two-position, two-way ball valves to control the pressure of the main valve control lower chamber (two symmetrical chambers in the main valve, the lower one is defined as the main valve control lower chamber) to achieve the control of the main valve displacement.
  • the control method is simple and the response speed is fast.
  • FIG1 is a hydraulic principle diagram of a preferred embodiment provided by the present invention.
  • FIG2 is a partial cross-sectional view of the front view of the overall structure provided by the present invention.
  • Fig. 3 is a cross-sectional view of the overall structure of Fig. 2 provided by the present invention.
  • FIG4 is a B-B cross-sectional view of the pilot valve in FIG3 provided by the present invention.
  • FIG5 is a C-C sectional view of the pilot valve in FIG3 provided by the present invention.
  • FIG. 6 is a schematic diagram of the process of opening the pilot valve provided by the present invention.
  • FIG. 7 is a schematic diagram of a control method provided by the present invention.
  • 1 is the main valve core
  • 2 is the main valve seat
  • 3 is the main valve body
  • 4 is the main valve control lower chamber
  • 5 is the main valve control upper chamber
  • 6 is the flow channel a
  • 7 is the flow channel b
  • 8 is the main valve spring
  • 9 is the main valve push rod
  • 10 is the main valve core displacement sensor
  • 11 is the main valve spring adjustment nut
  • 12 is the pilot valve
  • 13 is the flow channel c
  • 14 is the main valve core damping hole
  • 15 is the pilot valve I
  • 16 is the pilot valve II
  • 17 is the flow channel d
  • 18 is the flow channel e
  • 19 is the flow channel f
  • 20 is the pilot valve body
  • 21 is flow channel g
  • 22 is high-speed switching valve
  • 23 is pilot control chamber
  • 24 is upper pilot valve core
  • 25 is upper pilot valve spring
  • 26 is main valve control chamber
  • 27 is ball valve seat
  • 28 is ball valve core
  • 29 is pilot oil inlet chamber
  • 30 is ball valve reset
  • the current flow valves mostly use sliding valves as valve cores. This is because the traditional hydraulic system with mineral oil as the medium has problems such as pollution and flammability. Therefore, water hydraulics are gradually replacing oil hydraulics in the fields of food processing, seawater desalination, metallurgy, coal mining, etc. However, the viscosity of water medium is lower than that of mineral oil, and it is easy to leak. Therefore, its control valve can only use the structure of ball valve and cone valve. If a sliding valve is used, there will be serious leakage and the flow valve cannot work. Then the first thing to solve in this application is to control the leakage of the main valve.
  • a pilot valve is set to amplify the power, and then the amplified power is used to drive the main valve. Then the setting of the pilot valve is also the most important thing.
  • the next problem to be solved in this application is to select a suitable pilot valve to facilitate control while ensuring no leakage.
  • the main valve of this application adopts a symmetrical cylinder plug-in structure, which is the hydraulic principle diagram provided by this application as shown in Figure 1. It is a cone valve with two symmetrical control chambers, and can be used in water hydraulic systems due to its good sealing performance.
  • the pilot valves on the market generally use high-response servo valves to drive the main valve. High-response servo valves are all slide valves, so they cannot be used in water hydraulic systems. Therefore, the pilot valve 12 used in this application in Figure 1 is a two-position, two-way normally open ball valve, which controls the flow and pressure of the lower chamber 4 by controlling the main valve to achieve the purpose of controlling the displacement of the main valve.
  • the pilot valve is at most four two-position two-way valves (or two two-position three-way valves, these two schemes are completely equivalent in principle).
  • Two valves are used to control the main valve to control the upper chamber 5
  • two valves are used to control the main valve to control the lower chamber, so that the main valve spool can quickly open the valve port and quickly close the valve port.
  • the response is very fast, there are some disadvantages, such as complex structure, high cost, and difficult control.
  • the cleverness of the present application lies in the use of two two-position two-way valves to directly control the main valve to control the lower chamber and the main valve spring 8 force coordination, so as to achieve control of the main valve. This design method makes the valve structure simple, easy to control, and greatly simplifies processing and assembly.
  • FIG. 2 is a front view of the entire digital throttle valve, including a main valve and a pilot valve.
  • the main valve body 3 of the main valve includes a main valve core 1 and a main valve seat 2.
  • the main valve core is embedded in the main valve seat, and the two are coaxially arranged.
  • a flow channel c13 is opened on the central axis of the main valve core.
  • a main valve core damping hole 14 is installed at the flow channel c near the entrance of the main valve core.
  • a main valve push rod 9 is installed at the outlet of the flow channel c, that is, one end of the main valve push rod is connected to the top of the main valve core, and the other end of the main valve push rod is covered with a main valve spring adjusting nut 11.
  • a main valve spring is sleeved on the main valve push rod located between the main valve spring adjusting nut and the top of the main valve core.
  • the circumferential wall near the top of the main valve core protrudes outward to form a boss, dividing the chamber between the main valve core and the main valve seat from the inlet of the flow channel c to the outlet of the flow channel c into the main valve control lower chamber and the main valve control upper chamber.
  • the high-water base liquid flows from the inlet of the main valve core through the damping hole of the main valve core, the flow channel c and the main valve push rod into the main valve upper chamber to achieve pressure balance with the main valve core;
  • the pilot valve body is connected to the main valve, and the pilot valve controls the pressure of the main valve control lower chamber to overcome the main valve spring force, thereby controlling the axial displacement of the main valve core in the main valve seat to achieve flow regulation.
  • a groove is provided in the part of the main valve spring adjusting nut facing the other end of the main valve push rod, and the other end of the main valve push rod is embedded in the groove.
  • a main valve core displacement sensor is also arranged between the other end of the main valve push rod and the groove, and the main valve core displacement sensor is connected to the main valve spring adjusting nut through a thread; one end of the main valve push rod is connected to the top of the main valve core through a thread.
  • pilot valve I15 and pilot valve II16 are inserted into the pilot valve body 20 by threads; as shown in FIG4 , pilot valve I or pilot valve II includes a coaxially arranged high-speed switch valve 22, an upper pilot valve core 24, an upper pilot valve spring 25, a ball valve seat 27, a ball valve core 28, a ball valve reset seat 30, a ball valve reset spring 31, a pilot cartridge valve body 32 and a pilot valve screw plug 33; the upper pilot valve core is coaxially installed in the pilot cartridge valve body, and the upper pilot valve core is connected to the pilot cartridge valve at the bottom end.
  • the ball valve seat and the pilot valve plug are connected to the pilot cartridge valve body through threads, and a boss is coaxially arranged at the bottom of the ball valve reset seat, in which a ball valve reset spring is embedded, and the ball valve reset spring is coaxially arranged with the boss;
  • the ball valve reset seat can be slidably installed on the top of the pilot valve plug, and a trapezoidal groove is provided on the top of the ball valve reset seat, and the ball valve core is embedded in the trapezoidal groove, and the ball valve core can roll on the top of the ball valve reset seat, and the ball valve reset seat is pressed against the conical surface of the ball valve seat under the action of the ball valve reset spring to form a line seal;
  • the space where the ball valve seat, the ball valve core, the ball valve reset seat and the pilot valve plug are located forms a pilot oil inlet chamber 29.
  • the middle circumferential wall of the upper pilot valve core protrudes outward to form an annular platform.
  • the diameter of the annular platform is larger than the diameter of the central hole of the pilot cartridge valve body, which can limit the upper pilot valve core; one end of the upper pilot valve spring is sleeved by the bottom end of the upper pilot valve core, that is, the top end of the upper pilot valve spring is in contact with the bottom surface of the annular platform of the upper pilot valve core, and the other end of the upper pilot valve spring is in contact with the top of the ball valve seat; in the pilot cartridge valve body, the space where the upper pilot valve core and the upper pilot valve spring are located forms a main valve control chamber 26.
  • the main valve control chamber formed in the pilot valve here is for subsequent communication with the main valve control lower chamber to control the pressure of the main valve control lower chamber.
  • pilot cartridge valve body In the pilot cartridge valve body, the space between the top of the upper pilot valve core and the pilot cartridge valve body forms a pilot control chamber 23;
  • a high-speed switching valve is installed on the top of the pilot cartridge valve body, and the oil inlet of the high-speed switching valve is connected to the pilot control chamber.
  • a high-speed switching valve is used as the drive in the present application.
  • stepper motor or servo motor + ball screw or nut pair the motor outputs rotational motion, which is then converted into linear motion by the screw or nut to drive the valve core
  • voice coil motor with lever amplification mechanism to directly drive the pilot valve core
  • control with a high-speed switching valve displacement control is achieved by controlling the pressure in the upper chamber of the valve core
  • high-speed switching valves are low-cost, so the cost can be significantly reduced if high-speed switching valves are used.
  • high-speed switching valves are a type of digital valve with the characteristics of low cost, low power consumption, simple structure and reliable operation.
  • pilot oil inlet port P p is connected to the pilot oil inlet chamber of pilot valve II through flow channel e18;
  • the main valve control chamber of pilot valve II is connected to one end of flow channel d17, and the other end of flow channel d is connected to the oil inlet chamber of pilot valve I;
  • pilot valve II the pilot control chamber is connected to the pilot oil inlet chamber through pilot damping hole I35 and flow channel i36;
  • pilot valve I the pilot control chamber is connected to the pilot oil inlet chamber of pilot valve II through flow channel h34, pilot damping hole II37 and flow channel j38, and flow channel h34 connects flow channel i36 and flow channel j38, and the connection position is located below pilot damping hole I35 and pilot damping hole II37;
  • the main valve control chamber of pilot valve II is connected to the main valve control lower chamber through flow channel a6; one end of the main valve control chamber of pilot valve I is connected to the
  • the present application provides a control method based on the high-pressure, high-flow, high-water-based plug-in digital throttle valve.
  • the digital throttle valve When the digital throttle valve is in a no-flow output state, the high-speed switch valves of the pilot valve I and the pilot valve II are normally open, and the high-water-based emulsion in the pilot control chamber flows back to the emulsion tank through the high-speed switch valve.
  • the ball valve core is pressed against the ball valve seat under the action of the ball valve return spring, and the pilot valve I and the pilot valve II are in a closed state; the pressure of the upper chamber controlled by the main valve and the lower chamber controlled by the main valve are both zero, and the main valve core is fitted with the main valve seat under the action of the main valve spring, and the displacement of the main valve core is zero.
  • FIG7 is a core principle diagram of the control method of the present application.
  • the displacement of the main valve core opening is calculated according to the relationship between the valve port flow and the displacement, and the displacement signal is converted into a duty cycle signal of the high-speed switch valves of the pilot valves I and II.
  • the pressure of the pilot control chambers of the pilot valves I and II is controlled by controlling the proportion of the switch time in a single cycle of the high-speed switch valves.
  • the upper pilot valve core moves along the central axis toward the ball valve core under the action of the pilot control chamber pressure, pushing the ball valve core open.
  • the emulsion flows from the pilot oil inlet chamber of the pilot valve II through the main valve control chamber, and a part of it flows into the main valve control lower chamber, and the other part flows back to the pilot oil return port through the flow channel d, the pilot oil inlet chamber of the pilot valve I, the main valve control chamber, and the flow channel f, that is, returns to the emulsion tank;
  • the amount of emulsion flowing into the lower control chamber of the main valve is controlled by controlling the duty cycle of the high-speed switching valve of the pilot valve II, and the amount of emulsion flowing out of the lower control chamber of the main valve is controlled by controlling the duty cycle of the high-speed switching valve of the pilot valve I.
  • the duty cycles of the two high-speed switching valves are respectively controlled to control the amount of emulsion actually flowing into the lower control chamber of the matching main valve, thereby controlling the pressure of the lower control chamber of the matching main valve ( Figure 6 is a schematic diagram of the state when the pilot valve is opened).
  • the main valve core moves along the center axis toward the main valve push rod; at this time, the main valve core displacement signal measured by the main valve core displacement sensor 10 is compared with the expected main valve core displacement signal, and the error signal is input into the controller to accurately control the displacement of the main valve core.
  • the duty ratio of the high-speed switch valve of the pilot valve I and the pilot valve II is changed respectively, and the opening of the ball valve core of the pilot valve I and the pilot valve II is adjusted, thereby controlling the pressure of the lower chamber of the main valve, so that the main valve core moves along the central axial direction, thereby achieving the purpose of controlling the displacement of the main valve.
  • the high-pressure, large-flow, high-water-based plug-in digital throttle valve and control method provided in this application not only have the characteristics of simple structure, small leakage, rapid response and strong anti-pollution ability, but also can meet the working conditions of high pressure and large flow.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

L'invention concerne une soupape d'étranglement numérique de type cartouche à base d'eau à haute pression et à grand débit et haute pression et un procédé de commande, la soupape d'étranglement comprenant une soupape principale et des soupapes pilotes. La soupape principale utilise une structure de type cylindre symétrique et est pourvue d'une chambre de commande supérieure et d'une chambre de commande inférieure qui sont symétriques. Les soupapes pilotes utilisent une structure d'une paire de clapets à bille normalement fermés de type cartouche à deux voies à deux positions ; chaque soupape pilote utilise une soupape de commutation à grande vitesse normalement ouverte en tant que pilote et commande, à l'aide d'un signal MLI, la quantité de flux s'écoulant dans ou hors de la chambre de commande inférieure de soupape principale, de façon à commander la pression de la chambre de commande inférieure de soupape principale et à surmonter une force de ressort de la soupape principale, en poussant ainsi l'élément de soupape principal à se déplacer ; et un capteur de déplacement est utilisé pour obtenir une commande précise en boucle fermée sur un déplacement de la soupape principale. La soupape principale est une soupape conique, et les soupapes pilotes et le pilote sont tous des clapets à bille, de sorte que ledit papillon des gaz présente une bonne étanchéité et aucune fuite sous un milieu à base d'eau élevée ou d'eau pure. Les soupapes pilotes utilisent deux soupapes à deux voies à deux positions qui sont de structure simple et dont le traitement, l'assemblage et la commande sont faciles ; la soupape de commutation à grande vitesse est utilisée en tant que pilote, qui est peu coûteux et hautement résistant à la pollution, et présente une grande force de sortie ; et des structures mécaniques, telles que des leviers ou des vis à billes n'ont pas besoin d'être introduites.
PCT/CN2022/144410 2022-09-26 2022-12-31 Soupape d'étranglement numérique du type à cartouche à base d'eau, à haute pression et à grand débit et procédé de commande Ceased WO2024066127A1 (fr)

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CN119712643A (zh) * 2024-12-27 2025-03-28 北京天玛智控科技股份有限公司 一种电机驱动型水基比例换向阀及其控制方法
CN119749842A (zh) * 2024-11-25 2025-04-04 中航工业南京伺服控制系统有限公司 具有断电保持功能的双控式飞机停放刹车控制阀及控制方法
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CN119878865B (zh) * 2025-01-20 2025-10-03 华电煤业集团数智技术有限公司 一种电机控制型高水基大流量数字比例阀
CN119670582B (zh) * 2025-02-20 2025-06-10 肯佐控制设备（上海）有限公司 一种基于实时数据分析的电动阀门运行优化方法及系统

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