WO2015080932A1 - Système de vanne pour commande d'écoulement bidirectionnel - Google Patents

Système de vanne pour commande d'écoulement bidirectionnel Download PDF

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Publication number
WO2015080932A1
WO2015080932A1 PCT/US2014/066539 US2014066539W WO2015080932A1 WO 2015080932 A1 WO2015080932 A1 WO 2015080932A1 US 2014066539 W US2014066539 W US 2014066539W WO 2015080932 A1 WO2015080932 A1 WO 2015080932A1
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WO
WIPO (PCT)
Prior art keywords
valve
port
flow
bore
control
Prior art date
Application number
PCT/US2014/066539
Other languages
English (en)
Inventor
Chad Anthony LARISH
Original Assignee
Eaton Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eaton Corporation filed Critical Eaton Corporation
Publication of WO2015080932A1 publication Critical patent/WO2015080932A1/fr

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Classifications

    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
    • F16K31/1245—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated with more than one 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
    • 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
    • F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
    • F16K31/406—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston

Definitions

  • Valve assemblies are used in various applications.
  • Example of the valve assemblies includes a hydraulic feedback valve system acting as a flow amplifier.
  • the 10 valve body of the hydraulic feedback valve system may operate to amplify a small pilot flow through a feedback passage that forms part of a feedback control circuit.
  • a small proportional valve in the feedback control circuit of the valve system permits handling of large flows passing through the system.
  • Such a hydraulic feedback valve system is primarily used to control flow 15 through the system in one direction.
  • it is desired to have a valve system that is capable of selectively controlling flow in a reverse direction.
  • some valve assemblies have introduced valve arrangements to control flow in a reverse direction, it is only available with relatively significant design changes in the valve bodies.
  • the present disclosure relates generally to a valve system.
  • the valve system includes a valve arrangement for controlling flow both in a normal direction and in a reverse direction.
  • the valve system includes a valve housing, a valve body or spool, and a valve control arrangement.
  • the valve housing defines a valve bore 25 and first and second ports in fluid communication with the valve bore.
  • the valve body is movably accommodated within the valve bore to control fluid communication through the valve bore between the first and second ports.
  • the valve body can move to a closed position within the valve bore where fluid communication is closed between the first and second ports through the valve bore.
  • the valve body is arranged within the 30 valve bore and movable within the valve bore along a longitudinal axis of the valve bore to control fluid communication through the valve bore between the first and second ports.
  • the valve body may move between an open position where the valve body opens fluid communication through the valve bore between the first and second ports, and a closed position where fluid communication through the valve bore between the first and second ports is closed.
  • the valve arrangement can operate in four modes of operation.
  • the first and second modes are operable when an operating pressure at the first port is greater than an operating pressure at the second port.
  • the operating pressure from the first port interacts with the valve body to retain the valve body in the closed position within the valve bore.
  • the position of the valve body within the valve 10 bore is controlled to provide a controlled rate of flow through the valve bore from the first port to the second port.
  • the third and fourth modes are operable when the operating pressure at the second port is greater than the operating pressure at the first port.
  • the operating pressure from the second port interacts with the valve body to retain the valve body in the closed position within the valve bore.
  • the 15 operating pressure from the second port interacts with the valve body to move the valve body away from the closed position (that is, to move into the open position) within the valve bore when the operating pressure of the second port exceeds the operating pressure of the first port by a predetermined amount.
  • flow is permitted through the valve bore from the second port to the first port when the valve body is moved away 20 from the closed position.
  • valve bore extends between first and second ends of the valve bore, and the first port is arranged at the second end of the valve bore and the second port is arranged at a side of the valve bore.
  • the valve body includes a first end adjacent the first end of the valve bore and a second end adjacent the second end of 25 the valve bore, and the first end of the valve body that cooperates with the valve housing defines a control chamber at the first end of the valve bore.
  • the first end of the valve body may include a first land having a first end face and a second land having a second end face.
  • the first land may have a larger diameter than the second land, and the second end face may have a smaller surface area 30 than the first end face.
  • the valve body may also include a valve stem extending between the first and second ends of the valve body, or between the first and second lands of the valve body, and is arranged to be in general alignment with the second port.
  • the second end, or the second land, of the valve body may be configured to selectively close the first port to prevent fluid communication through the valve bore between the first and second ports in the closed position.
  • valve body may define a control flow passage 5 extending through the valve body for providing fluid communication between the first port and the control chamber.
  • the control flow passage may include a flow metering portion adjacent the first end of the valve body for metering flow through the control flow passage based on a position of the valve body within the valve bore.
  • the flow metering portion may be 10 configured to increase a cross-sectional passage area of the control flow passage as the valve body moves toward the control chamber and decrease the cross-sectional passage area of the control flow passage as the valve body moves away from the control chamber.
  • the valve system may include first and second flow paths, each extending from the control chamber to the second port.
  • the valve system 15 may further include a pilot valve positioned along the first flow path.
  • the pilot valve is operable in a first state where the pilot valve closes fluid communication between the control chamber and the second port along the first flow path and in a second state where the pilot valve opens fluid communication between the control chamber and the second port along the first flow path.
  • the pilot valve may be proportionally controlled in the 20 second state to provide a controlled flow rate through the first flow path from the control chamber to the second port.
  • the valve system may include a reversing flow control valve positioned along the second flow path.
  • the reversing flow control valve may be operable in a first state where the reversing flow control valve is open to allow 25 fluid flow therethrough and in a second state where the reversing flow control valve is closed to prevent fluid flow therethrough.
  • the valve system may include a one-way check valve positioned along the second flow path.
  • the one-way check valve is configured and arranged to allow fluid flow through the second flow path in a direction from the second port to the control 30 chamber and prevent fluid flow through the second flow path in a direction from the
  • control chamber to the second path.
  • the pilot valve When the valve system is operating in the first mode of operation, the pilot valve is operated in the first state. In this mode, the operating pressure from the first port pressurizes the control chamber and acts on the first end of the valve body to retain the valve body in the closed position within the valve bore.
  • the pilot valve When the valve system is operating in the second mode, the pilot valve is operated in the second state to reduce the pressure in the control chamber such that the valve body moves away from the closed position within the valve bore and provides a controlled rate of flow through the valve 5 bore from the first port to the second port.
  • the pilot valve When the valve system is operating in the third mode, the pilot valve is operated in the first state, and the reversing flow control valve is operated in the first state. In this mode, the operating pressure from the second port pressurizes the control chamber and acts on the first end of the valve body to retain the valve body in the closed position 10 within the valve bore.
  • the pilot valve When the valve system is operating in the fourth mode, the pilot valve is operated in the first state, and the reversing flow control valve is operated in the second state.
  • the operating pressure from the second port interacts with the valve body to move the valve body away from the closed position when the operating pressure 15 of the second port exceeds the operating pressure of the first port by a predetermined amount, so that flow is permitted through the valve bore from the second port to the first port when the valve body moves away from the closed position.
  • the predetermined amount is associated with a resulting force exerting on the valve body by the operating pressures from the first and second ports.
  • the predetermined amount 20 may be modified by a various factors such as design of the valve system including the shape or dimension of the valve body.
  • FIG. 1 is a schematic, cross-sectional view of an example valve system in a 25 first mode of operation thereof.
  • FIG. 2 is a schematic, cross-sectional view of the valve system of FIG. 1 in a second mode of operation.
  • FIG. 3 is a schematic, cross-sectional view of the valve system of FIG. 1 still in the second mode of operation.
  • FIG. 4 is a schematic, cross-sectional view of the valve system of FIG. 1 in a third mode of operation.
  • FIG. 5 is a schematic, cross-sectional view of the valve system of FIG. 1 in a fourth mode of operation.
  • FIG. 1 is a schematic, cross-sectional view of an example valve system in a first mode according to the present disclosure.
  • the valve system 10 is configured as a 10 hydraulic fluid control valve for controlling a flow of a pressurized fluid between two ports defined in the valve system.
  • the valve system 10 includes a main stage valve 12, a pilot valve 60, a reversing flow control valve 70, and a one-way check valve 80.
  • the main stage valve 12 includes a valve housing 14 that defines a valve 15 bore 16.
  • the valve bore includes a first end 18 and a second end 20 thereof and extends along its longitudinal axis or valve bore axis between the first end 18 and the second end 20.
  • the valve housing 14 also includes a first port 22 located at the first end 18 and a second port 24 located at a side of the valve bore 16.
  • the main stage valve 12 also includes a valve body or spool 26.
  • the valve 20 body or spool 26 is moveably accommodated within the valve bore 16.
  • the spool 26 is configured to be displaceable within the valve bore 16 along the longitudinal axis of the valve bore 16.
  • the relative position of the spool 26 within the valve bore 16 determines a main flow between the first port 22 and the second port 24 in different operational modes as explained below.
  • the spool 26 may be of different types.
  • the spool 26 25 is of the seat valve type or poppet valve type, having a head 28 at a first end of the spool 26 adjacent the first end 18 of the valve bore 16 and a closing member 30 at a second end of the spool 26 adjacent the second end 20 of the valve bore 16.
  • the head 28 and the closing member 30 are configured to be disc-shaped.
  • embodiments of the spool of the present invention may have any types suitable for opening or closing of 30 the main flow.
  • the head 28 of the spool 26 includes a first land 32 having a first end face 36.
  • the closing member 30 of the spool 26 includes a second land 34 having a second end face 38.
  • the first land 32 is configured to have a larger diameter than the second land 34.
  • the second end face 38 has a smaller surface area than the first end face 36.
  • the spool 26 also includes a valve stem 42 extending between the first land 32 and the second land 34 along the longitudinal axis of the valve bore 16.
  • the valve stem 42 can have a smaller diameter than the first land 32 and the second land 34.
  • the valve stem 42 has a groove 43 that surrounds the valve stem 42.
  • the valve stem 5 42 can have different shapes depending on the design of the valve system 10.
  • the main stage valve 12 includes a control chamber 40 that is defined by the valve housing 14 and the first end face 36 of the first land 32 at the first end 18 of the valve bore 16.
  • the second end face 38 of the second land 34 is arranged to face toward the first port 22.
  • the spool 26 includes a control flow passage 50 defined therein for
  • the control flow passage 50 extends through the spool 26 and provides fluid communication between the first port 22 and the control chamber 40.
  • the control flow passage 50 is configured as a feedback duct 52 extending through the spool 26 between an 15 inlet 54 and an outlet 56.
  • the inlet 54 is formed in the second land 34 of the spool 26 at the second end of the spool 26.
  • the outlet 56 is arranged in a peripheral surface of the first land 32 of the spool 26 adjacent the first end of the spool 26.
  • the outlet 56 may be configured as a longitudinal aperture or slot.
  • the feedback control circuit begins from the first port 22 into the inlet 54, extends through the feedback duct 52 to the outlet 20 56, and reaches the control chamber 40 out of the outlet 56. As explained below, the feedback control circuit continues to a pilot valve 60 and further extends from the pilot valve 60 into the second port 24 via a first flow path 62.
  • the outlet 56 together with a metering edge 58 defined by the valve housing 14, forms a variable orifice or flow metering portion adjacent the first end of the 25 spool 26 in the control chamber 40.
  • the flow metering portion operates to meter flow through the control flow passage 50 based on a position of the spool 26 within the valve bore 16.
  • the flow metering portion increases a cross-sectional passage area of the control flow passage 50 as the spool 26 moves toward the control chamber 40, thereby permitting for increased flow between the control chamber 40 and the first port 22.
  • the 30 flow metering portion decreases the cross-section passage area of the control flow passage 50 as the spool 26 moves away from the control chamber 40, thereby decreasing fluid flow between the control chamber 40 and the first port 22.
  • the spool 26 may move between an open position and a closed position within the valve bore 16.
  • the second land 34 of the spool 26 opens fluid communication through the valve bore 16 between the first port 22 and the second port 24.
  • the second land 34 of the spool 26 closes fluid communication through the valve bore 16 between the first port 22 and the second port 24.
  • the outlet 56 5 of the control flow passage 50 is almost, but not entirely, closed.
  • the spool 26 is in the closed position, the outlet 56 is partially exposed over the metering edge 58 to the control chamber 40 (that is, the flow metering portion is open), and thus the control flow passage 50 still remains open and maintains the feedback control circuit.
  • the pilot valve 60 is arranged along the first flow path 62 extending from 10 the control chamber 40 to the second port 24.
  • the pilot valve 60 may operate between a first state and a second state. In the first state, the pilot valve 60 closes fluid
  • the pilot valve 60 In the second state, the pilot valve 60 gradually opens fluid communication along the first flow path 62 and provides a controlled flow rate via the first 15 flow path 62 from the control chamber 40 to the second port 24 (see FIG. 2).
  • the pilot valve 60 may be in the first state (the closed state) when it is in a de- energized state (see FIG. 1), and may be in the second state (the open state) when it is in an energized state (see FIG. 2).
  • an input signal such as an electric current
  • a solenoid in the 20 pilot valve 60 to gradually move a valve spool 64 from the first state as shown in FIG. 1 to the right into the second state, which is a gradually opened state of the pilot valve 60.
  • the pilot valve 60 is configured to open in proportion to the amount of the input signal supplied to the pilot valve 60.
  • the reversing flow control valve 70 is arranged along a second flow path 25 72 extending between the control chamber 40 and the second port 24.
  • the reversing flow control valve 70 may operate between a first state and a second state. In the first state, the reversing flow control valve 70 is open to allow fluid flow from the second port 24 to the control chamber 40 via the second flow path 72. In the second state, the reversing flow control valve 70 is closed to prevent fluid flow through the second flow path 72.
  • the reversing flow control valve 70 may be in the first state (the open state) when it is in a de-energized state, and may be in the second state (the closed state) when it is in an energized state.
  • the one-way check valve 80 is positioned along the second flow path 72.
  • the one-way check valve 80 is configured to allow fluid flow through the second flow path 72 in a direction from the second port 24 to the control chamber 40, and prevents fluid flow via the second flow path 72 in the opposite direction, that is, in a direction from the control chamber 40 to the second port 24.
  • the valve system 10 may operate in 5 four different operating modes.
  • the first and second modes of operation are selectable when a first operating pressure (P1), a pressure of fluid flow at, or from, the first port 22, is greater than a second operating pressure (P2), a pressure of fluid flow at, or from, the second port 24.
  • the third and fourth modes are operable when the second operating pressure (P2) is greater than the first operating pressure (P1).
  • Each of the four operating 10 modes is hereinafter explained.
  • the valve system 10 is operating in the first operating mode where the spool 26 remains in the closed position within the valve bore 16 while the first operating pressure (P1) is greater than the second operating pressure (P2). 15 Therefore, the spool 26 prevents fluid from flowing through the valve bore 16 between the first port 22 and the second port 24.
  • the pilot valve 60 is in the first state where it closes fluid communication between the control chamber 40 and the second port 24 via the first flow path 62.
  • the reversing flow control valve 70 may be either in the first state or in the second state. Although the reversing flow 20 control valve 70 is in the first state (see FIG. 1) where it opens fluid communication
  • the first operating pressure (P1) from the first port (22) pressurizes the control chamber 40 through the control flow passage 50 and acts on the first end face 36 of the spool 26, thereby retaining the spool 26 in the closed position within the valve bore 16.
  • the first operating pressure (P1) in the first 30 port 22 is communicated to the control chamber 40 via the feedback duct 52 of the control flow passage 50 and the outlet 56 exposed over the metering edge 58.
  • the spool 26 remains seated on the first port 22 (that is, the closed position) as illustrated in FIG. 1.
  • FIGS. 2 and 3 illustrate the second mode of operation of the valve system 5 10 of FIG. 1.
  • the spool 26 moves into the open position within the valve bore 16, thereby opening fluid communication via the valve bore 16 between the first port 22 and the second port 24.
  • the first operating pressure (P1) is greater than the second operating pressure (P2)
  • P1 is greater than the second operating pressure (P2)
  • P2 fluid flow occurs from the first port 22 to the second port 24 via the valve bore 16 when the spool 26 is in the open position.
  • the pilot valve 60 is controlled to shift from the first state, in which fluid communication is closed between the control chamber 40 and the second port 24 via the first flow path 62, to the second state.
  • the pilot valve 60 is gradually controlled to provide a controlled flow rate via the first flow path 62 from the control chamber 40 to the second port 24. Therefore, 15 the control chamber 40 is gradually opened to the second port 24 that has a lower pressure (the second operating pressure (P2)) than in the first port 22 with the first operating pressure (P1). The pressure in the control chamber 40 then decreases and causes the spool 26 to move away from its closed position and toward into the control chamber 40 and open the first port 22 to the second port 24 through the valve bore 16.
  • P2 second operating pressure
  • P1 the first operating pressure
  • the pressure in the 20 control chamber 40 will then adjust to a level between the pressures in the first port 22 and the second port 24, resulting in the spool 26 being balanced by equal resulting, opposite forces exerting on the first end face 36 of the spool 26 exposed to the control chamber 40 and on the rest of the surface of the spool 26 exposed to the first and second ports 22 and 24.
  • the pilot valve 60 is further opened, the pressure again decreases in the control 25 chamber 40, resulting in the spool 26 moving further into the control chamber 40.
  • the position of the spool 26 within the valve bore 16 depends on a particular design of the valve system 10 including the outlet 56 of the control flow passage 50 and the degree of opening of the pilot valve 60.
  • the reversing flow control valve 70 may 30 be either in the first state (as shown in FIG. 3) or in the second state (as shown in FIG. 2) because fluid will not flow in any direction between the control chamber 40 and the second port 24 regardless of the state of the reversing flow control valve 70.
  • the second operating pressure (P2) lower than the first operating pressure (P1) and the operation of the one-way check valve 80 prevents fluid flow from the control chamber 40 to the second port 24 although the reversing flow control valve 70 is in the first state (the opened state) as shown in FIG. 3.
  • FIG. 4 illustrates the third mode of operation of the valve system 10 of FIG. 5 1.
  • the third mode is operable when the second operating pressure (P2) is greater than the first operating pressure (P1).
  • the pilot valve 60 is operated in its first state where the pilot valve 60 closes fluid communication between the control chamber 40 and the second port 24 via the first flow path 62, and the reversing flow control valve 70 is operated in its first state where the reversing flow control valve 70 opens fluid
  • the second operating pressure (P2) from the second port 24 pressurizes the control chamber 40 15 through the second flow path 72 and acts on the first end face 36 of the spool 26, thereby retaining the spool 26 in the closed position within the valve bore 16.
  • the second operating pressure (P2) in the second port 24 is communicated to the control chamber 40 via the second flow path 72. Because the second operating pressure (P2) is greater than the first operating pressure (P1), the spool 26 remains seated on the first port 20 22 (that is, the closed position) as illustrated in FIG. 4.
  • FIG. 5 illustrates the fourth mode of operation of the valve system 10 of FIG. 1.
  • the fourth mode is operable when the second operating pressure (P2) is greater than the first operating pressure (P1).
  • the pilot valve 60 is operated in 25 its first state where the pilot valve 60 closes fluid communication between the control chamber 40 and the second port 24 via the first flow path 62
  • the reversing flow control valve 70 is operated in its second state where the reversing flow control valve 70 closes fluid communication between the control chamber 40 and the second port 24 via the second flow path 72.
  • the second operating pressure (P2) from the 30 second port 24 interacts with the surface of the spool 26 exposed to the second operating pressure (P2) from the second port 24 and moves the spool 26 into the open position within the valve bore 16, thereby opening fluid communication via the valve bore 16 between the first port 22 and the second port 24.
  • the second operating pressure (P2) is greater than the first operating pressure (P1) in the fourth mode, fluid flow happens from the second port 24 to the first port 22 via the valve bore 16 when the spool 26 is in the open position.
  • fluid also flows from the control chamber 40 through the control flow passage 50 of the spool 26 to the first port 22.
  • the first flow path 62 and the second flow path 72 are all closed and thus the control chamber 40 is not in fluid communication with the second port 24.
  • the first operating pressure (P1) in the first port 22 is communicated to the control chamber 40 via the control flow passage 50.
  • the first operating pressure (P1) from the first port 22 pressurizes the 10 control chamber 40 through the control flow passage 50 and acts on the first end face 36 of the spool 26.
  • the fourth mode of operation occurs when the second operating pressure (P2) of the second port 24 exceeds the first operating pressure (P1) of the first port (22) by a predetermined amount.
  • the first operating pressure 15 (P1) from the first port 22 presses on the first end face 36 of the spool 26 in a downward direction (in a direction toward the first port 22).
  • the first operating pressure (P1) acts on the second end face 38 of the spool 26 in an upward direction (in a direction away from the first port 22) (in FIG. 5).
  • the second operating pressure (P2) of the second port 24 acts on the surface of the spool 26 that is exposed to 20 the second operating pressure (P2) present within the groove 43 (e.g., the underside of the first land 32 and the top side of the second land 34).
  • the underside of the first land 32 has a larger surface area than the top side of the second land 34. Therefore, the spool 26 will move away from the closed position only when the resulting force in the opposite directions becomes positive in the upward direction (in a direction away from the first port 25 22).
  • such a predetermined amount that causes the spool 26 to move away from the closed position in the fourth mode is determined by various factors such as a particular design of the valve system 10 including the shape or dimension of the spool 26.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)

Abstract

L'invention porte sur un système de vanne pour commander un écoulement dans des directions normale et inverse. Le système de vanne comprend un boîtier de vanne, un corps de vanne et un agencement de commande de vanne. Le boîtier de vanne définit un passage de vanne et des premier et second orifices en communication fluidique avec le perçage de vanne. Le corps de vanne est reçu de façon mobile à l'intérieur du perçage de vanne pour commander une communication fluidique à travers le perçage de vanne entre les premiers et seconds orifices. Le corps de vanne peut se déplacer vers une position fermée dans laquelle une communication fluidique à travers le perçage de vanne entre les premier et second orifices est fermée. L'agencement de vanne fonctionne dans quatre modes de fonctionnement. Dans le premier mode, la pression fonctionnelle à partir du premier orifice interagit avec le corps de vanne de façon à maintenir le corps de vanne dans la position fermée à l'intérieur du perçage de vanne. Dans le deuxième mode, la position du corps de vanne à l'intérieur du perçage de vanne est commandée de façon à produire un débit d'écoulement commandé à travers le perçage de vanne à partir du premier orifice jusqu'au second orifice. Dans le troisième mode, la pression fonctionnelle à partir du second orifice interagit avec le corps de vanne de façon à maintenir le corps de vanne dans la position fermée à l'intérieur du perçage de vanne. Dans le quatrième mode, la pression fonctionnelle à partir du second orifice interagit avec le corps de vanne de façon à éloigner le corps de vanne de la position fermée à l'intérieur du perçage de vanne quand la pression fonctionnelle du second orifice dépasse la pression fonctionnelle du premier orifice d'une quantité prédéterminée, de façon à permettre ainsi un écoulement à travers le perçage de vanne à partir du second orifice jusqu'au premier orifice quand le corps de vanne est éloigné de la position fermée.
PCT/US2014/066539 2013-11-27 2014-11-20 Système de vanne pour commande d'écoulement bidirectionnel WO2015080932A1 (fr)

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US201361909428P 2013-11-27 2013-11-27
US61/909,428 2013-11-27

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WO2020131377A1 (fr) * 2018-12-17 2020-06-25 Parker-Hannifin Corporation Vanne à ouverture souple

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US20090194728A1 (en) * 2008-02-05 2009-08-06 Evan Pickett Wide-Body Pneumatic Valve having Internalized Valve Actuator
US20110284790A1 (en) * 2009-04-06 2011-11-24 Tadaaki Ikeda Pressure-operated control valve
US20120153193A1 (en) * 2010-12-15 2012-06-21 Mks Instruments, Inc. Two-stage, slow-start valve apparatus and method
US20120273074A1 (en) * 2010-01-21 2012-11-01 Smc Kabushiki Kaisha Flow control device

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US20090072180A1 (en) * 2007-09-13 2009-03-19 John Leslie Johnson Double action directional fluid flow valve
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