SE9002494L - Anordning vid hydraulmotor foer styrning av densamma - Google Patents

Anordning vid hydraulmotor foer styrning av densamma

Info

Publication number
SE9002494L
SE9002494L SE9002494A SE9002494A SE9002494L SE 9002494 L SE9002494 L SE 9002494L SE 9002494 A SE9002494 A SE 9002494A SE 9002494 A SE9002494 A SE 9002494A SE 9002494 L SE9002494 L SE 9002494L
Authority
SE
Sweden
Prior art keywords
hydraulic
pump
pressure
hydraulic motor
hydraulic circuit
Prior art date
Application number
SE9002494A
Other languages
Unknown language ( )
English (en)
Other versions
SE9002494D0 (sv
SE466712B (sv
Inventor
Bo Andersson
Original Assignee
Bo Andersson
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 Bo Andersson filed Critical Bo Andersson
Priority to SE9002494A priority Critical patent/SE466712B/sv
Publication of SE9002494D0 publication Critical patent/SE9002494D0/sv
Priority to DK91850176.8T priority patent/DK0468944T3/da
Priority to DE69105851T priority patent/DE69105851T2/de
Priority to ES91850176T priority patent/ES2075412T3/es
Priority to EP91850176A priority patent/EP0468944B1/en
Priority to AT91850176T priority patent/ATE115686T1/de
Priority to US07/734,644 priority patent/US5287794A/en
Priority to JP3182336A priority patent/JP2923379B2/ja
Publication of SE9002494L publication Critical patent/SE9002494L/sv
Publication of SE466712B publication Critical patent/SE466712B/sv

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01Locking-valves or other detent i.e. load-holding devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003Systems with load-holding valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01Locking-valves or other detent i.e. load-holding devices
    • F15B13/015Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401Valve members; Fluid interconnections therefor
    • F15B13/0405Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/2053Type of pump
    • F15B2211/20546Type of pump variable capacity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/30505Non-return valves, i.e. check valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/3056Assemblies of multiple valves
    • F15B2211/30565Assemblies 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
    • F15B2211/3057Assemblies 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 having two valves, one for each port of a double-acting output member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/315Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31523Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
    • F15B2211/31529Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having a single pressure source and a single output member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/32Directional control characterised by the type of actuation
    • F15B2211/329Directional control characterised by the type of actuation actuated by fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/35Directional control combined with flow control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/40Flow control
    • F15B2211/405Flow control characterised by the type of flow control means or valve
    • F15B2211/40515Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/40Flow control
    • F15B2211/41Flow control characterised by the positions of the valve element
    • F15B2211/413Flow control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/40Flow control
    • F15B2211/415Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41581Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a return line
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/40Flow control
    • F15B2211/42Flow control characterised by the type of actuation
    • F15B2211/428Flow control characterised by the type of actuation actuated by fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/40Flow control
    • F15B2211/46Control of flow in the return line, i.e. meter-out control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/60Circuit components or control therefor
    • F15B2211/605Load sensing circuits
SE9002494A 1990-07-24 1990-07-24 Anordning vid hydraulmotor foer styrning av densamma SE466712B (sv)

Priority Applications (8)

Application Number Priority Date Filing Date Title
SE9002494A SE466712B (sv) 1990-07-24 1990-07-24 Anordning vid hydraulmotor foer styrning av densamma
DK91850176.8T DK0468944T3 (da) 1990-07-24 1991-06-25 Arrangement til styring af hydrauliske motorer
DE69105851T DE69105851T2 (de) 1990-07-24 1991-06-25 Einrichtung zur Steuerung hydraulischer Motoren.
ES91850176T ES2075412T3 (es) 1990-07-24 1991-06-25 Dispositivo para controlar motores hidraulicos.
EP91850176A EP0468944B1 (en) 1990-07-24 1991-06-25 An arrangement for controlling hydraulic motors
AT91850176T ATE115686T1 (de) 1990-07-24 1991-06-25 Einrichtung zur steuerung hydraulischer motoren.
US07/734,644 US5287794A (en) 1990-07-24 1991-07-23 Hydraulic motor with inlet fluid supplemented by fluid from contracting chamber
JP3182336A JP2923379B2 (ja) 1990-07-24 1991-07-23 水圧モータ制御装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9002494A SE466712B (sv) 1990-07-24 1990-07-24 Anordning vid hydraulmotor foer styrning av densamma

Publications (3)

Publication Number Publication Date
SE9002494D0 SE9002494D0 (sv) 1990-07-24
SE9002494L true SE9002494L (sv) 1992-01-25
SE466712B SE466712B (sv) 1992-03-23

Family

ID=20380042

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9002494A SE466712B (sv) 1990-07-24 1990-07-24 Anordning vid hydraulmotor foer styrning av densamma

Country Status (8)

Country Link
US (1) US5287794A (sv)
EP (1) EP0468944B1 (sv)
JP (1) JP2923379B2 (sv)
AT (1) ATE115686T1 (sv)
DE (1) DE69105851T2 (sv)
DK (1) DK0468944T3 (sv)
ES (1) ES2075412T3 (sv)
SE (1) SE466712B (sv)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207059A (en) * 1992-01-15 1993-05-04 Caterpillar Inc. Hydraulic control system having poppet and spool type valves
US5220862A (en) * 1992-05-15 1993-06-22 Caterpillar Inc. Fluid regeneration circuit
US5415076A (en) * 1994-04-18 1995-05-16 Caterpillar Inc. Hydraulic system having a combined meter-out and regeneration valve assembly
JPH08174299A (ja) * 1994-12-20 1996-07-09 Hirohisa Tanaka 油圧プレス装置のラム駆動用油圧シリンダの駆動制御方法
US5520262A (en) * 1995-04-28 1996-05-28 Caterpillar Inc. Electrohydraulic steering system
US5622095A (en) * 1995-06-28 1997-04-22 Foster; Raymond K. Hydraulic drive and control system
DE19607479A1 (de) * 1996-02-28 1997-09-04 Iveco Magirus Hydrauliksystem
DE29713294U1 (de) 1997-07-25 1997-09-25 Heilmeier & Weinlein Hydraulische Steuervorrichtung für ein Kipperfahrzeug
DE19931142C2 (de) * 1999-07-06 2002-07-18 Sauer Danfoss Holding As Nordb Hydraulische Ventilanordnung mit Verriegelungsfunktion
US6691604B1 (en) * 1999-09-28 2004-02-17 Caterpillar Inc Hydraulic system with an actuator having independent meter-in meter-out control
US7121189B2 (en) * 2004-09-29 2006-10-17 Caterpillar Inc. Electronically and hydraulically-actuated drain value
US7204084B2 (en) * 2004-10-29 2007-04-17 Caterpillar Inc Hydraulic system having a pressure compensator
US7146808B2 (en) * 2004-10-29 2006-12-12 Caterpillar Inc Hydraulic system having priority based flow control
US7441404B2 (en) 2004-11-30 2008-10-28 Caterpillar Inc. Configurable hydraulic control system
DE102005010637B4 (de) * 2005-03-08 2007-02-01 Bosch Rexroth Aktiengesellschaft Verfahren zum Schutz vor Einklemmen und Einklemmschutzvorrichtung
US7204185B2 (en) * 2005-04-29 2007-04-17 Caterpillar Inc Hydraulic system having a pressure compensator
US7243493B2 (en) * 2005-04-29 2007-07-17 Caterpillar Inc Valve gradually communicating a pressure signal
US7302797B2 (en) * 2005-05-31 2007-12-04 Caterpillar Inc. Hydraulic system having a post-pressure compensator
US7194856B2 (en) * 2005-05-31 2007-03-27 Caterpillar Inc Hydraulic system having IMV ride control configuration
US7210396B2 (en) * 2005-08-31 2007-05-01 Caterpillar Inc Valve having a hysteretic filtered actuation command
US7331175B2 (en) * 2005-08-31 2008-02-19 Caterpillar Inc. Hydraulic system having area controlled bypass
US7614336B2 (en) * 2005-09-30 2009-11-10 Caterpillar Inc. Hydraulic system having augmented pressure compensation
US20100043418A1 (en) * 2005-09-30 2010-02-25 Caterpillar Inc. Hydraulic system and method for control
US7320216B2 (en) * 2005-10-31 2008-01-22 Caterpillar Inc. Hydraulic system having pressure compensated bypass
DE602006006676D1 (de) * 2006-09-01 2009-06-18 Parker Hannifin Ab Ventilanordnung
JP4318266B2 (ja) * 2007-03-30 2009-08-19 エムエーエヌ・ディーゼル・フィリアル・アフ・エムエーエヌ・ディーゼル・エスイー・ティスクランド 大型2サイクルディーゼルエンジン用のカム駆動燃料噴射システム
US7621211B2 (en) * 2007-05-31 2009-11-24 Caterpillar Inc. Force feedback poppet valve having an integrated pressure compensator
US8479504B2 (en) 2007-05-31 2013-07-09 Caterpillar Inc. Hydraulic system having an external pressure compensator
US20080295681A1 (en) * 2007-05-31 2008-12-04 Caterpillar Inc. Hydraulic system having an external pressure compensator
KR101445729B1 (ko) * 2007-07-02 2014-10-07 파커 하니핀 매뉴팩쳐링 스웨덴 아베 유체 밸브 장치
US7827787B2 (en) 2007-12-27 2010-11-09 Deere & Company Hydraulic system
GB0912540D0 (en) 2009-07-20 2009-08-26 Bamford Excavators Ltd Hydraulic system
US8631650B2 (en) 2009-09-25 2014-01-21 Caterpillar Inc. Hydraulic system and method for control
US9127437B2 (en) 2010-12-15 2015-09-08 Caterpillar Inc. Flow regeneration hydraulic circuit
CH705150A1 (de) * 2011-06-30 2012-12-31 Liebherr Machines Bulle Sa Ventilanordnung für ein hydraulisches Steuerungssystem.
JP5785846B2 (ja) * 2011-10-17 2015-09-30 株式会社神戸製鋼所 油圧制御装置及びこれを備えた作業機械
US20180112686A1 (en) * 2016-10-26 2018-04-26 Hydraforce, Inc. Hydraulic actuator system of vehicle having secondary load-holding valve with tank connection

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE26028E (en) * 1963-05-16 1966-05-17 Pilot operated control valve mechanism
US3470792A (en) * 1967-08-02 1969-10-07 Cessna Aircraft Co Maximum pressure control apparatus for hydraulic actuators
US3433131A (en) * 1967-08-22 1969-03-18 Ingebret Soyland Control systems for hydraulic power units
JPS5032378A (sv) * 1973-07-24 1975-03-29
US4250794A (en) * 1978-03-31 1981-02-17 Caterpillar Tractor Co. High pressure hydraulic system
JPS5614603A (en) * 1979-07-17 1981-02-12 Kobe Steel Ltd Control circuit for actuator
US4362018A (en) * 1980-06-12 1982-12-07 Kobe Steel, Ltd. Hydraulic rotation control circuit
JPH0246801B2 (ja) * 1981-06-29 1990-10-17 Uchida Yuatsu Kiki Kogyo Kk Shokoshirindanoseigyokairosochi
JPS5821005A (ja) * 1981-07-27 1983-02-07 Hitachi Constr Mach Co Ltd 油圧回路の制御装置
US4611528A (en) * 1981-11-12 1986-09-16 Vickers, Incorporated Power transmission
US4437385A (en) * 1982-04-01 1984-03-20 Deere & Company Electrohydraulic valve system
DE3770178D1 (de) * 1986-01-30 1991-06-27 Komatsu Mfg Co Ltd Hydraulikdruck-steuerung.
US4811650A (en) * 1987-08-28 1989-03-14 Vickers, Incorporated Power transmission

Also Published As

Publication number Publication date
DE69105851T2 (de) 1995-05-11
SE9002494D0 (sv) 1990-07-24
EP0468944A1 (en) 1992-01-29
ES2075412T3 (es) 1995-10-01
EP0468944B1 (en) 1994-12-14
ATE115686T1 (de) 1994-12-15
DK0468944T3 (da) 1995-05-15
JPH04262072A (ja) 1992-09-17
DE69105851D1 (de) 1995-01-26
JP2923379B2 (ja) 1999-07-26
SE466712B (sv) 1992-03-23
US5287794A (en) 1994-02-22

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