EP1254316B1 - Dispositif de commande pour servomoteur hydraulique - Google Patents

Dispositif de commande pour servomoteur hydraulique Download PDF

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Publication number
EP1254316B1
EP1254316B1 EP20010900472 EP01900472A EP1254316B1 EP 1254316 B1 EP1254316 B1 EP 1254316B1 EP 20010900472 EP20010900472 EP 20010900472 EP 01900472 A EP01900472 A EP 01900472A EP 1254316 B1 EP1254316 B1 EP 1254316B1
Authority
EP
European Patent Office
Prior art keywords
valve
piston
control device
bore
housing
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 - Lifetime
Application number
EP20010900472
Other languages
German (de)
English (en)
Other versions
EP1254316A1 (fr
Inventor
JÖrg Linser
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.)
Robert Bosch Automotive Steering GmbH
Original Assignee
ZF Lenksysteme GmbH
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 ZF Lenksysteme GmbH filed Critical ZF Lenksysteme GmbH
Publication of EP1254316A1 publication Critical patent/EP1254316A1/fr
Application granted granted Critical
Publication of EP1254316B1 publication Critical patent/EP1254316B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
    • 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
    • F15B13/0433—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 the pilot valves being pressure control valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • Y10T137/87201—Common to plural valve motor chambers
    • 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

Definitions

  • the invention relates to a control device according to the Art defined in the preamble of claim 1.
  • a control device is known from the US patent 3,714,868. This well-known facility works according to the closed center principle.
  • the present invention is based on the object to create a control device that is suitable for to work according to the principle of the open center, however Leakage largely avoided. It should also be constructed simply be, work reliably and without great manufacturing effort can be produced.
  • the object underlying the invention is achieved by one, also the characteristic features of the main claim having generic control device solved.
  • the bore is arranged so that when under system pressure the piston is pressed against the housing, the bore in the piston is closed to prevent leakage.
  • the invention enables a function independent of the size be ensured.
  • the control device according to the invention can be used for various applications and easily adaptable to changing requirements. she can used for example for a hydraulic servomotor be, especially if its control after the Open center principle works.
  • the invention enables a modular structure of the in particular electrohydraulic control device, so that many parts can be used multiple times as far as Manufacturing and assembly work considerable advantages brings. Because of the simple Standard seals that can be used not high regarding tolerances and surface quality Make demands on the components. In addition, on the use of special materials is dispensed with, what regarding heat and surface treatment of Advantage is. At the same time, there remains a high degree of flexibility for get different use cases. A particularly safe one Function is ensured by the fact that no moving Parts can be assembled. Will the invention Control device for one hydraulic servomotor used, this can after the Principle of the open or the closed center controlled become.
  • the force that regulates the throttle point can mechanical, electrical, electromagnetic, hydraulic or be applied pneumatically.
  • the pistons have special Sealing elements on that in addition to their sealing function Can take over storage properties. You are preferred made of resistant and low-wear materials, such as for example, Teflon.
  • the piston of the active controlled valve at least one bore is integrated, which serves to supply pressure medium to a pressure chamber, which is connected to the passive valve via a line is.
  • the single figure shows a control device according to the invention, which controls a hydraulic servomotor.
  • In the bore 5 is one with a Spring 11 loaded piston 12 axially movable.
  • the piston 12 has a stepped outer diameter.
  • a sealing element 13 in the piston 12 separates the bore 5 in two pressure chambers 14, 15.
  • the sealing element 13 serves simultaneously still for low-friction guidance of the piston 12.
  • Die Spring 11 is supported on a fixedly connected to the housing 4, disc-shaped element 16.
  • the disk-shaped Element 16 has a throttle point 17 with a throttle needle axially displaceable by a positioning force 18 interacts and thus a change in volume flow allows.
  • the pressure medium flowing through the throttle point 17 flows through a further pressure chamber 24 and over a line 23 back to the tank.
  • the throttle needle 18 pushed into the throttle point 17.
  • the print medium through a bore 19 arranged in the piston 12 flow; due to the smaller cross section of the Throttle point 17 there is a pressure build-up in the Pressure room 14. From a defined pressure in pressure room 14 there is a balance of forces between the end faces 20 and 21 acting pressure forces.
  • the spring 11 has the task of the piston 12 in the neutral position against the Slide housing 4 that by throttling the volume flow of the print medium in an annular gap 22 a predetermined Pressure difference can arise when entering a throttle effect at the throttle point 17 a compressive force on the end face 21 of the piston 12 causes the overcomes the friction of the sealing element 13.
  • a throttle needle 29 must close a throttle point 30, whereby an annular gap 31 is closed.
  • the pressure medium flows through a bore 32 into a pressure chamber 33 and from there via a line 34 into a pressure chamber 35, which is formed by a piston 36 axially displaceable in the bore 7 and the housing 4.
  • the piston 36 which is loaded by a spring 37, closes an annular gap 38.
  • a piston 42 of the hydraulic servomotor 41 is displaced and the pressure medium is passed on from a second pressure chamber 43 to the line 10 in the housing 4 via a line 44.
  • the pressure medium can flow out to the tank 2 via an open annular gap 45, which is formed between the housing 4 and a piston 46 which is axially displaceable in the bore 8 and is loaded by a spring 47.
  • a pressure chamber 50 which is formed by the housing 4 and the piston 46 loaded by a spring 47, is operatively connected to the pressure chamber 14 via a line 25.
  • An actively controlled valve 48 thus also controls a passive valve 49 at the same time.
  • a bore 52 can also be provided in the piston 46 of the passive valve 49 in order to return the pressure medium to the pressure chamber 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Servomotors (AREA)
  • Fluid-Driven Valves (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (5)

  1. Dispositif de commande pour un servomoteur hydraulique (41), comprenant deux vannes (48, 49) qui présentent à chaque fois des pistons (12, 46) aux diamètres étagés logés de manière mobile dans le sens axial et chargés par des ressorts (11, 47), présentant les caractéristiques suivantes :
    a) la première vanne (48) peut être commandée par une force de réglage et son piston (12), combiné avec un élément (16) qui présente un point d'étranglement (17), forme un premier espace de compression (14) dans un boítier (4),
    b) le piston (46) de la deuxième vanne (49) forme, avec le boítier (4), un deuxième espace de compression (50) qui se trouve en liaison hydraulique avec le premier espace de compression (14) par le biais d'une conduite (25) de manière à ce que la deuxième vanne (49) puisse être commandée simultanément avec la première vanne (48),
    caractérisé par les caractéristiques suivantes :
    c) le dispositif de commande fonctionne selon le principe du centre ouvert,
    d) le piston (12) de la première vanne (48) et/ou le piston (46) de la deuxième vanne (49) présente un orifice (19 ou 52) qui sert à acheminer le fluide de pression vers l'espace de compression correspondant (14 ou 50),
    e) l'orifice (19 ou 52) dans le piston (12 ou 46) est disposé de telle manière que lorsque le piston (12 ou 46) est comprimé contre le boítier (4), l'orifice (19 ou 52) est fermé pour éviter les fuites.
  2. Dispositif de commande selon la revendication 1,
    caractérisé en ce que la première vanne (48) peut être commandée par le biais d'un point d'étranglement (17) muni d'un pointeau d'étranglement (18).
  3. Dispositif de commande selon la revendication 1,
    caractérisé en ce que la force de réglage peut être produite de manière mécanique, électrique, électromagnétique, hydraulique ou pneumatique.
  4. Dispositif de commande selon la revendication 1,
    caractérisé en ce que les pistons (12, 46) présentent des éléments d'étanchéité (13, 51) qui servent en même temps à l'étanchéification et au soutien.
  5. Dispositif de commande selon l'une quelconque des revendications précédentes, caractérisé en ce que
    deux trajets de conduite (9, 10) parallèles l'un à l'autre sont prévus entre une arrivée (3) d'un fluide de pression hydraulique et un réservoir (2),
    une vanne de commande du type de la première vanne (48) est à chaque fois prévue initialement dans les deux trajets de conduite, vus dans la direction de l'écoulement du . fluide de pression qui se produit pendant le fonctionnement, laquelle est suivie d'une vanne commandée simultanément du type de la deuxième vanne (49), et
    la vanne (49) commandée simultanément qui est à chaque fois disposée dans l'un des trajets de conduite est commandée simultanément par la vanne (48) qui commande de l'autre trajet de conduite.
EP20010900472 2000-02-11 2001-01-20 Dispositif de commande pour servomoteur hydraulique Expired - Lifetime EP1254316B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10006141A DE10006141A1 (de) 2000-02-11 2000-02-11 Elektrohydraulische Steuervorrichtung
DE10006141 2000-02-11
PCT/EP2001/000628 WO2001059305A1 (fr) 2000-02-11 2001-01-20 Dispositif de commande pour servomoteur hydraulique

Publications (2)

Publication Number Publication Date
EP1254316A1 EP1254316A1 (fr) 2002-11-06
EP1254316B1 true EP1254316B1 (fr) 2003-08-27

Family

ID=7630613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010900472 Expired - Lifetime EP1254316B1 (fr) 2000-02-11 2001-01-20 Dispositif de commande pour servomoteur hydraulique

Country Status (5)

Country Link
US (1) US6712091B2 (fr)
EP (1) EP1254316B1 (fr)
JP (1) JP4619605B2 (fr)
DE (2) DE10006141A1 (fr)
WO (1) WO2001059305A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10006141A1 (de) 2000-02-11 2001-09-06 Zf Lenksysteme Gmbh Elektrohydraulische Steuervorrichtung
DE10251127B4 (de) * 2002-11-02 2008-11-06 Zf Lenksysteme Gmbh Steuereinrichtung
JP5232177B2 (ja) * 2007-02-28 2013-07-10 レイセオン カンパニー 作動装置を能動的および受動的に作動させる対立する流体制御システム
US7779863B2 (en) * 2007-06-29 2010-08-24 Raytheon Sarcos, Llc Pressure control valve having an asymmetric valving structure
US8291934B2 (en) * 2010-01-20 2012-10-23 Eaton Corporation Proportional valve assembly
DE102012017714A1 (de) * 2012-09-07 2014-03-13 Hoerbiger Automatisierungstechnik Holding Gmbh Geregelte Proportional-Dreiwegeventileinheit

Family Cites Families (20)

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Publication number Priority date Publication date Assignee Title
DE1095203B (de) * 1957-03-16 1960-12-15 Yale & Towne Mfg Co Hubstapler mit einer Klammer fuer Rollen od. dgl.
US3714868A (en) 1970-09-23 1973-02-06 Marotta Scientific Controls Valve system for proportional flow control for fluid-operated motor
AT314926B (de) * 1970-10-05 1974-04-25 Kurt Friebe Anordnung mehrerer Ventilstufen zum programmierten Steuern von Druckluft
US3838710A (en) * 1972-11-03 1974-10-01 Vapor Corp Hydraulic valve
US4111226A (en) * 1977-08-01 1978-09-05 Ross Operating Valve Co. Multiple function four poppet valve system
JPH0115963Y2 (fr) * 1980-08-29 1989-05-11
US5331883A (en) * 1981-09-28 1994-07-26 Bo Andersson Hydraulic valve means
US4437385A (en) * 1982-04-01 1984-03-20 Deere & Company Electrohydraulic valve system
LU87045A1 (de) 1987-11-12 1988-05-03 Hydrolux Sarl Hydraulischer steuerblock
DE3812116C2 (de) 1988-04-12 1998-11-19 Bosch Gmbh Robert Elektrohydraulisches Wegeventil
JP2844743B2 (ja) * 1989-11-14 1999-01-06 東陶機器株式会社 逆流防止装置
DE9202938U1 (de) * 1992-03-05 1992-05-07 Herion-Werke Kg, 7012 Fellbach Sicherheitsventil
DE4422742C2 (de) 1994-06-29 1997-02-06 Rexroth Mannesmann Gmbh Hydraulisches Wegeventil, das insbesondere von einem Proportionalmagneten betätigbar ist
DE4446144A1 (de) * 1994-12-23 1996-06-27 Bosch Gmbh Robert Hydraulische Steuerung in Monoblockbauweise aus mindestens zwei verketteten elektromagnetisch betätigbaren Proportionalwegeventilelementen
DE19500749C2 (de) 1995-01-12 2000-12-07 Danfoss As Drei- oder Mehr-Wege-Ventil
JPH094747A (ja) 1995-06-22 1997-01-07 Aisin Seiki Co Ltd 電磁比例式圧力弁
DE19535898A1 (de) 1995-09-27 1997-04-03 Joerg J Prof Dipl Ing Linser Lenkventil mit geschlossener Mitte und variablem Abschneideffekt für Fahrzeughilfskraftlenkungen
DE19536553A1 (de) 1995-09-30 1997-04-03 Eckehart Schulze Elektrohydraulische Steuerventilanordnung
DE19634319A1 (de) * 1996-08-24 1998-02-26 Bosch Gmbh Robert Elektrohydraulische Steuervorrichtung
DE10006141A1 (de) 2000-02-11 2001-09-06 Zf Lenksysteme Gmbh Elektrohydraulische Steuervorrichtung

Also Published As

Publication number Publication date
DE10006141A1 (de) 2001-09-06
WO2001059305A1 (fr) 2001-08-16
US20030010194A1 (en) 2003-01-16
EP1254316A1 (fr) 2002-11-06
US6712091B2 (en) 2004-03-30
JP4619605B2 (ja) 2011-01-26
DE50100555D1 (de) 2003-10-02
JP2003525399A (ja) 2003-08-26

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