EP0139259B1 - Valve pour la commande de l'écoulement d'un fluide entre une pompe, un réservoir et un dispositif hydraulique à double effet - Google Patents

Valve pour la commande de l'écoulement d'un fluide entre une pompe, un réservoir et un dispositif hydraulique à double effet Download PDF

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Publication number
EP0139259B1
EP0139259B1 EP84111742A EP84111742A EP0139259B1 EP 0139259 B1 EP0139259 B1 EP 0139259B1 EP 84111742 A EP84111742 A EP 84111742A EP 84111742 A EP84111742 A EP 84111742A EP 0139259 B1 EP0139259 B1 EP 0139259B1
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EP
European Patent Office
Prior art keywords
valve
bore
pilot
fact
per
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.)
Expired
Application number
EP84111742A
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German (de)
English (en)
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EP0139259A1 (fr
Inventor
Kenneth Dee Kramer
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.)
Deere and Co
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Deere and Co
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Publication date
Application filed by Deere and Co filed Critical Deere and Co
Priority to AT84111742T priority Critical patent/ATE33877T1/de
Publication of EP0139259A1 publication Critical patent/EP0139259A1/fr
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Publication of EP0139259B1 publication Critical patent/EP0139259B1/fr
Expired 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87193—Pilot-actuated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87193—Pilot-actuated
    • Y10T137/87209—Electric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87217—Motor
    • Y10T137/87225—Fluid motor

Definitions

  • the invention relates to a valve for controlling the fluid connection between a pump, a collecting container and a consumer which can be acted upon from both sides.
  • valve bore in the housing of the valve are a valve bore, at least one inlet connecting the pump to the valve bore, an outlet connecting the valve bore to the reservoir, two connecting the valve bore to the work spaces of the consumer Working channels and a first and a second pressure-dependent, displaceable valve part are provided in the valve bore.
  • the area between the two valve parts is pressurized by the pump, causing the left and right spring-loaded cone valves to be lifted from their seats and a line with one side of the consumer and the pump and another line with the other side of the consumer and with the collecting container get connected.
  • Which of the two lines is connected to the pump and to the collecting tank depends on the position of a control slide, which can take four different positions, which serve to keep the consumer in a floating position, in which both sides of the consumer with the collecting tank are connected and in which the pump pressurizes the area between the valve parts, in each case to connect one side of the consumer to the pump and the other side of the consumer to the collecting container and to do this, both sides of the consumer and also the area between the two valve parts to the Connect the collecting container. In the last position, the consumer piston is blocked. With this combination, the desired function can be achieved, but this requires the control slide, which is an additional component and is susceptible to failure due to possible contamination in the liquid. Adjusting it in four different positions means additional effort.
  • EP-A-0 103 250 which is only to be taken into account with regard to the novelty, has already disclosed a valve in which the control slide has been dispensed with and in which two solenoid valves are used for actuation.
  • This valve also works with two valve parts, which act on cone valves in the opening sense in order to connect the non-pressurized side of the consumer to the collection container. This valve cannot be operated so that the piston in the consumer goes into the floating position.
  • valve for controlling the fluid connection between a pump, a collecting container and a consumer that can be acted on from both sides
  • a manual and a remote control are provided, via which two valve bodies each act on one side of the consumer a neutral position, in which the inflow to and the outflow from the consumer is blocked, can be shifted in a direction in which one side of the consumer is connected to the pump and the other side of the consumer is connected to the collecting container.
  • the valve body is shifted from the neutral position in the opposite direction, the other side of the consumer is connected to the pump and, accordingly, the previously pressurized side of the consumer is connected to the collection container.
  • an inlet leading to the pump, two working channels leading to the consumer and two outlets leading to a collecting container are provided, each of which opens into a valve bore.
  • two valve bodies are displaceable, both of which are under the action of a spring which wants to move one valve body into an end position in which the inflow is interrupted by the pump, while the other spring acts on the second valve body in such a way that it is to be moved into its position connecting the working cylinder with the collecting container. So this valve body must be kept in the neutral position against the action of its spring via the manual or remote control.
  • valve bodies themselves are of complex construction, with two valve sealing surfaces each forming in the area of the inner bores provided in them. In addition, no floating position of the consumer can be achieved with this valve.
  • the object to be achieved with the invention is seen in providing an easy-to-control valve that can perform four functions.
  • valve for controlling the fluid connection between a pump, a collecting container and a consumer which can be acted on from both sides, a valve bore, at least one inlet connecting the pump to the valve bore, and the valve bore to the valve housing in the valve housing Outlet connecting connecting container, two working channels connecting the valve bore with the work spaces of the consumer and in the valve bore a first and a second pressure-dependent, displaceable valve part are provided, in the valve bore a first cone seat valve, the spring-loaded valve body of which rests a first in the neutral position against the first valve part Valve sealing surface for controlling the fluid connection between the outlet and the first working channel and a second in the neutral position against a housing shoulder of the valve bore valve sealing surface for controlling the fluid connection between the inlet and the first working channel, and a second conical seat valve are displaceable, the spring-loaded valve body having a third valve sealing surface in the neutral position against the second valve part for controlling the fluid connection between the outlet and the second working channel and a fourth valve sealing surface in the
  • an additional control spool can be dispensed with, since the pilot pressure generator integrated in the valve can initially achieve three functions, namely blocking the liquid in the workrooms of the consumer when both pilot pressure generators are at rest, and a second function when one of the two pilot pressure generators is actuated, whereby one work space of the consumer is connected to the pump and the other work space is connected to the collecting container.
  • the third function in which the other working space is connected to the pump and the first working space is connected to the collecting container, is achieved when the other pilot pressure generator is actuated and the previously actuated one is returned to its rest or starting position.
  • a fourth function in which the piston of the consumer is in a floating position, is given in a simple manner when both pilot pressure generators are operated together.
  • each valve part is provided with a through hole extending in its longitudinal axis
  • the fluid connection between the outlet and each working channel or both working channels takes place through the through holes, if the valve part or parts of the associated Valve sealing surface of the first or second cone seat valve or both is free. This allows the backflow from the non-pressurized work space of the consumer to be directed in a simple manner to the only outlet leading to the collecting container.
  • a pressing force between the first and second valve part is a spring that pushes apart, it is achieved that the movement of one valve part is resiliently transmitted to the other valve part and the connection to the outlet is always maintained.
  • the single spring presses the valve parts against the cone seat valves when the pilot pressure generators are not actuated, so that in the rest position the first and third valve sealing surfaces are closed and the liquid is prevented from escaping from the work spaces of the consumer.
  • each valve part is provided with a hollow flange and a hollow shaft and the housing in the region of its valve bore is provided with an annular space for receiving the flanges and a cylinder space into which the working channels and the inlet open and which each have a bore are connected to the annular space, which is in communication with the outlet
  • the outlet can open into the central part of the annular spaces and in the cylinder spaces the conical seat valves and the hollow shafts can be sealingly displaceable in the bores
  • each flange and each hollow shaft with the housing interacts to form a pilot room, each of which is connected to one of the pilot pressure generators.
  • each valve part can be provided with a drainage orifice which connects its pilot space to the annular space.
  • the pressure in the pilot space can simply decrease, which means returning the valve parts to the starting position in the case of non-actuated pilot pressure generators and, in the case of an actuated pilot pressure generator, a sensitive opening of the corresponding valve sealing surface dependent on the orifice opening.
  • Each pilot pressure generator can expediently have a pilot channel connected to the respective pilot space and a solenoid-controlled valve, via which the inflow into the pilot spaces can be controlled.
  • the first and third are advantageous Valve sealing surface of the poppet valves can be brought into contact with the end of the associated hollow shaft of the valve parts.
  • each inlet and each working channel are connected to the associated cylinder space via a channel, each cylinder space being offset and forming the housing shoulder in this area, furthermore each cone seat valve can be offset and configured such that there is a fluid connection between allows the channels when the second or fourth valve sealing surface is free from the housing shoulder, each cylinder space having a pilot opening which is permanently connected to the inlet or inlets and which can be closed by means of one of the solenoid-controlled valves.
  • At least the second and fourth valve sealing surfaces of the cone seat valve should also be conical.
  • valve parts and cone seat valves can be movable relative to one another at a back pressure coming from the consumer, so that the first or third valve sealing surface is free. This creates a connection to the collection container, so that additional pressure relief valves can be dispensed with.
  • the ends of the hollow shafts can have a larger diameter than the pins of the stepped conical seat valves, which have first and third valve sealing surfaces.
  • Each cylinder chamber can expediently have a section with a diameter that corresponds to that of the bore and a section with a larger diameter that is separated by the housing shoulder.
  • the valve 10 can be actuated electro-hydraulically and controls the fluid connection between two work spaces 12 and 14 of a consumer 16 in the form of a double-acting cylinder and a pump 18 and a collecting container 20.
  • the valve 10 is essentially formed from two mirror-image halves, so that only one page, the right one, needs to be described in detail. Identical parts on the left-hand side are provided with the same reference symbols and comma in the claims and are only provided with reference symbols in the drawing if this is necessary for better understanding.
  • the valve 10 has a housing 22 with two inlets 24, 24 ′ which conduct liquid from the pump 18 to a valve bore 26 which is provided in the housing 22. Likewise, an outlet 28 is incorporated in the housing 22, which connects the central part of the valve bore 26 to the collecting container 20. Two working channels 30, 30 ′ serve to connect the valve bore 26 and the working spaces 12 and 14 of the consumer 16.
  • valve bore 26 The two ends of the valve bore 26 are closed by pilot pressure generator 34, which will be explained in more detail below.
  • a simple fastening can be done by screwing and in the valve bore 26 housing cartridges 36 are inserted, which are screwed to housing parts 37 of the pilot pressure generator.
  • Each housing cartridge 36 is drilled out in stages so that a bore 40 and an annular space 42 are formed in the cylinder space 38.
  • the annular space 42 has the largest diameter. It is followed by the bore 40 with a relatively small diameter and the cylinder space 38, which initially has a diameter corresponding to the bore 40 and then merges into a part of a larger diameter.
  • 36 channels 44 and 46 and a pilot channel 48 are incorporated into each housing cartridge.
  • the channel 46 connects the working channel 30 with the cylinder space 38 in the area in which it has a diameter corresponding to the bore 40, while the channel 44 connects the inlet 24 with the cylinder space 38 in its area with the larger diameter.
  • the pilot channel 48 establishes a connection between the annular space 42 and a chamber 50, which is formed by one end of the housing cartridge 36 and the opposite part of the housing part 37 of the pilot pressure generator 34.
  • a valve piece 52 is inserted into the chamber 50 and is sealingly connected to one end of the housing cartridge 36 via an O-ring 54.
  • the valve piece 52 closes the cylinder space 38 at one end and has a pilot opening 56 which can be sealed by the valve sealing surface of a valve 58.
  • the valve 58 is part of the pilot pressure generator 34 and is permanently connected to an armature 60 which can be moved via a coil 62 and is under the action of a spring 63 which presses the valve 58 in the direction of the pilot opening 56.
  • the coil 62 can be electrically excited, the pilot opening 56 being free of the valve 58. This controls the valve 58 or the pilot pressure generator 34 solenoid
  • a hollow valve part 64 is inserted, which has a hollow cylindrical flange 66, which is sealingly and displaceably in the annular space 42 and merges into an axially extending hollow shaft 67, which in turn extends from the bore 40 can be sealed and moved.
  • the valve part 64 is in its neutral position with the bottom of its flange 66 not against the bottom of the annular space 42, so that part of the hollow shaft 67 protrudes from the bore 40 and a pilot space 68 is formed between the valve part 64 and the housing cartridge is connected to the chamber 50 via the pilot channel 48.
  • a drainage aperture 70 In the bottom of the flange 66 is a drainage aperture 70 with a small diameter
  • valve parts 64, 64 'located in the area of the outlet 28 in the neutral position with their open sides at a distance from one another are pressed apart by a single, centrally arranged spring 74.
  • a Kegesitzventil 80 is also slidably inserted in the housing cartridge in the region of the cylinder space 38. Specifically, it consists of a valve body 82 with a valve sealing surface designed as a cone, which is referred to as a second valve sealing surface 84 for the right valve half and as a fourth valve sealing surface 84 'for the left valve half.
  • the valve sealing surface merges into a pin 86, which also has a conical valve sealing surface at the end, which can be referred to as the first valve sealing surface 87 for the right valve half and as the third valve sealing surface 87 'for the left valve half.
  • valve sealing surface 87 and 87 ' can bear sealingly against the ends of the hollow shafts 67, whereas the valve sealing surface 84, 84' can sealingly bear against a respective housing shoulder which is formed in the part of the cylinder space 38 in which the diameter of the bore 40 corresponding part merges into the part with the larger diameter.
  • the housing shoulder is designated 89 'for the right valve half and 89' for the left valve half.
  • Valve body 82 and pin 86 have a smaller diameter than the parts of the cylinder space 38 which receive them, so that the pin 86 has a smaller diameter than the bore 40 or the outer diameter of the hollow shaft 67, as a result of which an annular surface remains on the hollow shaft Back pressure from the consumer 16 can be exposed.
  • the pins 86 and valve body 82 can also be designed differently. However, it must be ensured that a liquid connection from the channel 44 to the channel 46 is possible with free valve sealing surfaces 84, 84 'and that the liquid can reach the pilot opening 56 from the channel.
  • An annular flange 90 connected to the cone seat valve 80 is arranged to be displaceable in the part of the cylinder space 38 with the larger diameter next to the cone seat valve and is under the action of a spring.
  • the right spring is designated 92 and the spring on the left valve half is designated 92 '.
  • the ring flange 90 is also to be designed such that a connection from the channel 40 to the pilot opening 56 is always possible, which can be done, for example, by milled longitudinal grooves, which are not shown in the drawing.
  • valve sealing surfaces 84 'and 87, 87' are closed, so that no liquid can be conveyed to the working channels 30, 30 'by the pump 18, since the connection between the channels 44, 44' and 46, 46 'and thus between the inlets 24, 24' and the working channels 30, 30 'is interrupted by the second and fourth valve sealing surfaces 84, 84' bearing against the housing shoulders 89, 89 '.
  • valve sealing surface 87, 87 'becomes free which is due to this, for example takes place that the back pressure acts on the ring surfaces of the corresponding hollow shafts 67, 67 'projecting beyond the diameter of the respective pins 86, 86' and optionally on the transition points (valve sealing surface 84, 84 ') of the body and stem of the cone seat valves 80, 80'.
  • one of the working spaces 12 or 14 of the consumer 16 which is designed in the form of a cylinder which can be acted on from both sides, is now to be pressurized, one of the coils 62, 62 'of the pilot pressure generator 34, 34' is energized, causing the piston or the piston rod of the cylinder to move in or out is extended, whereas the coil of the other pilot pressure generator is not energized.
  • the coil 62 'of the pilot pressure generator 34' on the left valve half energized, then valve 58 'is moved to the left with reference to the drawing and releases pilot port 56'.
  • the pump chamber 68 ' is thereby acted upon by the pump pressure, since then a liquid connection from the inlet 24' via the channel 44 'connected to it, the cylinder chamber 38' in its part with the larger diameter, the pilot opening 56 ', the chamber 50 'and via the pilot channel 48' to the pilot room 68 '.
  • a pressure builds up in the left pilot space 68 ', which shifts the left valve part 64' to the right.
  • the left poppet valve 80 ' cannot follow this movement because the spring 92' is the fourth
  • Valve sealing surface 84 ' presses against the further housing shoulder 89' and thereby keeps the valve sealing surface closed.
  • the third valve sealing surface 87' opens, so that a fluid connection is created between the working space 12 and the collecting container 20, specifically via the working channel 30 ', the channel 46' connected to it Bore 40 ', the through hole 72', the annular space 42 'and the outlet 28.
  • the right valve part 64 is also shifted to the right via the then tensioned spring 74 and the right cone seat valve 80 counteracts the Effect of the right spring 92, since the hollow shaft 67 abuts the pin 86 of the right cone seat valve.
  • the coil 62 is excited to open the right pilot opening 56, after which the processes described above are reversed.
  • the consumer 16 can also be brought into a so-called floating position if both coils 62 and 62 'are excited at the same time. As a result, both pilot spaces 68 and 68 'are pressurized and both valve parts 64, 64' are moved to the center of valve 10. The valve sealing surfaces 87, 87 'become free, while the valve sealing surfaces 84, 84' remain closed. This creates a fluid connection between the two working spaces 12 and 14 to the outlet 28 and thus to the collecting container via the working channels 30, 30 ', the channels 46, 46', the bores 40, 40 'and the through bores 72, 72' in the valve parts 64, 64 'created. In this state, the piston in the consumer 16 can move freely.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Fluid-Driven Valves (AREA)
  • Float Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Vehicle Body Suspensions (AREA)
  • Joints Allowing Movement (AREA)
  • Braking Systems And Boosters (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Servomotors (AREA)

Claims (14)

1. Valve (10) pour la commande de la communication hydraulique entre une pompe (18), un réservoir (20) et un appareil utilisateur (16) pouvant être alimenté des deux côtés ou à double effet, dans laquelle:
- il est prévu, dans le carter ou boisseau (22) de la valve (10), un alésage (26) au moins un orifice d'entrée (24) reliant la pompe (18) à l'alésage (26) de la valve, un orifice de sortie (28) reliant l'alésage (26) de la valve au réservoir (20), deux canaux de travail (30,30') reliant l'alésage (26) de la valve aux chambres de travail (12, 14) de l'appareil utilisateur (16) et, dans l'alésage (26) de la valve, un premier et un second obturateurs (64, 64') déplaçables en fonction de la pression,
- un premier clapet conique (80), dont le corps (82) soumis à l'action d'un ressort comporte un premier siège de clapet (87) pouvant être appliqué, dans la position neutre, contre le premier obturateur (64) pour la commande de la communication hydraulique entre l'orifice de sortie (28) et le premier canal de travail (30) et un second siège de clapet (84) pouvant être appliqué, dans la position neutre, contre un épaulement de boisseau (89) de l'alésage (26) de la valve pour la commande de la communication hydraulique entre l'orifice d'entrée (24) et le premier canal de travail (30), et un second clapet conique (80') sont montés de façon coulissante dans l'alésage (26) de la valve, le corps (82') de ce second clapet, soumis à l'action d'un ressort, comportant un troisième siège de clapet (87') pouvant, dans la position neutre, être appliqué contre le second obturateur (64') pour la commande de la communication hydraulique entre l'orifice de sortie (28) et le second canal de travail (30') et un quatrième siège de clapet (84') pouvant être appliqué, dans la position neutre, contre un autre épaulement de boisseau (89') de l'alésage (26) de la valve pour la commande de la communication hydraulique entre l'orifice d'entrée (24) et le second canal de travail (30'),
- il est prévu un premier et un second générateurs de pression-pilote (34, 34'), qui peuvent être actionnés individuellement de telle façon qu'une pression-pilote peut être engendrée sur l'un des obturateurs (64, 64') de manière à déplacer les premier et second obturateurs (64, 64') et l'un des corps de clapet (82, 82') des clapets coniques (80, 80'), ce qui établit une liaison entre une chambre de travail (12 ou 14) de l'appareil utilisateur (16) et la pompe (18) et entre l'autre chambre de travail (14 ou 12) et le réservoir (20),
- les deux générateurs de pression-pilote (34, 34') peuvent être actionnés en même temps de telle façon qu'une pression-pilote peut être engendrée sur les premier et second obturateurs (64, 64') de manière à déplacer les premier et second obturateurs (64, 64'), de façon que les deux chambres de travail (12, 14) de l'appareil utilisateur (16) soient reliées au réservoir (20), et
- les obturateurs (64, 64') peuvent être écartés par la pression-pilote dérivant de la pression systémique contre l'action d'une force de pression (ressort (74)) du premier siège de clapet (87) et/ou du troisième siège de clapet (87').
2. Valve suivant la revendication 1, caractérisée en ce que chaque obturateur (64, 64') comporte un perçage de passage (72, 72') s'étendant suivant son axe longitudinal, et en ce que la communication hydraulique entre l'orifice de sortie (28) et chaque canal de travail (30, 30') ou les deux canaux de travail s'effectue a travers les perçages de passage (72, 72'), dans la mesure ou l'obturateur ou les obturateurs (64, 64') est écarté ou sont écartés du siège de clapet correspodnant (87 ou 87') du premier ou du second clapet conique (80 ou 80') ou de ces deux clapets.
3. Valve suivant la revendication 1, caractérisée en ce qu'il est prévu, comme force de pression entre le premier obturateur et le second obturateur (64, 64'), un ressort (74) tendant à les écarter par poussée.
4. Valve suivant une ou plusieurs des revendications précédentes, caractérisée en ce que chaque ressort respectif (92, 92') prend appui par une extrémité contre le carter ou boisseau (22) et s'appuie, par autre extrémité, contre un clapet conique (respectivement 80, 80'), de telle façon que les clapets coniques (80, 80') sont sollicités élastiquement l'un vers l'autre.
5. Valve suivant une ou plusieurs des revendications précédentes, caractérisée en ce que chaque obturateur (64, 64') comporte une bride creuse (66, 66') et une tige creuse (67, 67') et le carter ou boisseau (22) comporte, au voisinage de son alésage (26), une chambre annulaire (42, 42') pour la réception des brides (66, 66') et une chambre de cylindre respective (38, 38'), chambres dans lesquelles débouchent les canaux de travail (30, 30') et l'orifice d'entrée (24, 24') et qui sont reliées chacune par un perçage respectif (40, 40') à la chambre annulaire (42, 42') qui est en communication avec l'orifice de sortie (28), l'orifice de sortie (28) débouchant dans la partie médiane de la chambre annulaire (42, 42') et, dans les chambres de cylindre (38, 38'), les clapets coniques (80, 80') et les tiges creuses (67, 67') pouvant coulisser de façon étanche dans les perçages (40,40'), et chaque bride (66, 66') et chaque tige creuse (67, 67') coopérant avec le carter ou boisseau (22) pour former une chambre-pilote (68, 68'), lesquelles chambres sont reliées chacune à l'un des générateurs de pression-pilote (respectivement 34, 34')
6. Valve suivant la revendication 5, caractérisée en ce que chaque obturateur (64, 64') comporte un diaphragme d'écoulement d'échappement (70, 70') qui relie sa chambre-pilote (68, 68') à la chambre annulaire (42,42').
7. Valve suivant la revendication 5, caractérisée en ce que chaque générateur de pression-pilote (34,34') comporte un canal-pilote (48, 48') relié à la chambre-pilote correspondante (68, 68') et une valve commandée par solénoïde (58, 58') par laquelle l'écoulement d'admission dans les chambres-pilotes peut être commandé.
8. Valve suivant une ou plusieurs des revendications précédentes, caractérisée en ce que le premier siège et le troisième siège de clapet (87 et 87') des clapets coniques (80, 80') peuvent être appliqués chacun contre l'extrémité de la tige creuse correspondante (67, 67') des obturateurs (64, 64') respectivement.
9. Valve suivant une ou plusieurs des revendications précédentes, caractérisée en ce que chaque orifice d'admission (24, 24') et chaque canal de travail (30, 30') est relié par un canal respectif (44, 46, 44', 46') à la chambre de cylindre correspondante (38, 38'), chaque chambre de cylindre (38, 38') ayant un profil en gradins et formant dans cette zone les épaulements de boisseau (89, 89'), et, en outre, en ce que chaque clapet conique (80, 80') a un profil en gradins et est agencé de façon à permettre une communication hydraulique entre les canaux (44, 46, respectivement 44', 46'), lorsque le second ou quatrième siège de clapet (84, 84') est écarté des épaulements de boisseau (89, respectivement 89').
10. Valve suivant une ou plusieurs des revendications précédentes, caractérisée en ce que chaque chambre de cylidnre (38, 38') comporte un orifice-pilote (56, 56') relié de façon permanente à l'orifice ou aux orifices d'entrée (24, 24'), lequel orifice-pilote peut être obturé, dans chaque cas, par l'une des valves (58, respectivement 58') commandées par solénoïde.
11. Valve suivant une ou plusieurs des revendications précédentes, caractérisée en ce qu'au moins le second siège et le quatrième siège de clapet (84, 84') des clapets coniques (80, 80') ont une conformation conique.
12. Valve suivant une ou plusieurs des revendications précédentes, caractérisée en ce qu'en cas de contre-pression provenant de l'appareil utilisateur (16), les obturateurs (64, 64') et les clapets coniques (80, 80') peuvent être déplacés l'un par rapport à l'autre, de sorte que le premier ou troisième siège de clapet (87, 87') est dégagé.
13. Valve suivant la revendication 12, caractérisée en ce que les extrémités des riges creuses (67, 67') ont un diamètre plus grand que celui des tétons (86, 86') des clapets coniques (80, 80') à profil en gradins, comportant le premeir et le troisième sièges de clapet (87, 87').
14. Valve suivant la revendication 9, caractérisée en ce que chaque chambre de cylindre (38, 38') comporte un tronçon ayant un diamètre qui correspond à celui du perçage (40, 40') et un tronçon de plus grand diamètre, séparés par l'épaulement de boisseau (89, 89').
EP84111742A 1983-10-07 1984-10-02 Valve pour la commande de l'écoulement d'un fluide entre une pompe, un réservoir et un dispositif hydraulique à double effet Expired EP0139259B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111742T ATE33877T1 (de) 1983-10-07 1984-10-02 Ventil zum steuern der fluessigkeitsverbindung zwischen einer pumpe, einem sammelbehaelter und einem doppelseitig beaufschlagbaren verbraucher.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/539,785 US4506700A (en) 1983-10-07 1983-10-07 Poppet valve with float function
US539785 1983-10-07

Publications (2)

Publication Number Publication Date
EP0139259A1 EP0139259A1 (fr) 1985-05-02
EP0139259B1 true EP0139259B1 (fr) 1988-04-27

Family

ID=24152634

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111742A Expired EP0139259B1 (fr) 1983-10-07 1984-10-02 Valve pour la commande de l'écoulement d'un fluide entre une pompe, un réservoir et un dispositif hydraulique à double effet

Country Status (10)

Country Link
US (1) US4506700A (fr)
EP (1) EP0139259B1 (fr)
JP (1) JPS6098272A (fr)
AT (1) ATE33877T1 (fr)
AU (1) AU560646B2 (fr)
BR (1) BR8405019A (fr)
DE (1) DE3470778D1 (fr)
DK (1) DK479084A (fr)
ES (1) ES536557A0 (fr)
ZA (1) ZA847798B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686775A1 (fr) 1994-05-07 1995-12-13 Robert Bosch Gmbh Dispositif de vanne électropneumatique

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613747A1 (de) * 1986-04-23 1987-10-29 Concordia Fluidtechnik Gmbh 5/3-ventil
EP0580877B1 (fr) * 1991-07-09 1995-08-30 Honeywell Lucifer Sa Dispositif de régulation de pression
GB2310030A (en) * 1996-02-07 1997-08-13 Lucas Ind Plc Fluid pressure operated valve arrangement
US6789563B2 (en) * 2002-06-04 2004-09-14 Maxon Corporation Pneumatic exhaust controller
US6805328B2 (en) * 2002-06-04 2004-10-19 Maxon Corporation Shut-off valve apparatus
KR100849500B1 (ko) 2006-11-29 2008-07-31 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 플로팅 기능이 구비된 더블 체크밸브
KR100915206B1 (ko) * 2007-09-20 2009-09-02 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 플로팅 기능이 구비된 더블 체크밸브
US8444400B2 (en) * 2009-02-13 2013-05-21 Caterpillar Inc. Hydraulic cylinder having piston-mounted bypass valve
JP5702856B2 (ja) * 2010-05-18 2015-04-15 ボルボ コンストラクション イクイップメント アーベー 建設機械用ダブルチェックバルブ
US8590571B2 (en) 2010-07-22 2013-11-26 Bendix Commercial Vehicle Systems Llc Latching valve
US8474487B2 (en) 2010-07-22 2013-07-02 Bendix Commercial Vehicle System Llc Latching valve

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US2700986A (en) * 1951-04-04 1955-02-01 Bendix Aviat Corp Servo type solenoid valve
DE1751902A1 (de) * 1968-08-16 1971-06-03 Marotta Valve Corp Fernsteuerbares hydraulisches oder pneumatisches Antriebssystem
US3587630A (en) * 1969-05-02 1971-06-28 Deere & Co Pressure-compensated flow control valve
DE2639331C2 (de) * 1976-09-01 1982-09-23 Wolfgang 7114 Pfedelbach Steinigen Hydraulische oder pneumatische Drei-Wege-Weiche
GB2076182B (en) * 1980-04-30 1983-09-28 Chubb Fire Security Ltd Fluid control valve
US4437385A (en) * 1982-04-01 1984-03-20 Deere & Company Electrohydraulic valve system
US4461314A (en) * 1982-09-13 1984-07-24 Deere & Company Electrohydraulic valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686775A1 (fr) 1994-05-07 1995-12-13 Robert Bosch Gmbh Dispositif de vanne électropneumatique

Also Published As

Publication number Publication date
JPS6098272A (ja) 1985-06-01
DK479084A (da) 1985-04-08
DE3470778D1 (en) 1988-06-01
ES8601438A1 (es) 1985-10-16
ES536557A0 (es) 1985-10-16
US4506700A (en) 1985-03-26
ZA847798B (en) 1986-05-28
DK479084D0 (da) 1984-10-05
AU560646B2 (en) 1987-04-09
ATE33877T1 (de) 1988-05-15
AU3260284A (en) 1985-04-18
EP0139259A1 (fr) 1985-05-02
BR8405019A (pt) 1985-08-20

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