EP0605425B1 - Ein positionsanzeiger für einen hydraulischen stellmotor - Google Patents

Ein positionsanzeiger für einen hydraulischen stellmotor Download PDF

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Publication number
EP0605425B1
EP0605425B1 EP92910183A EP92910183A EP0605425B1 EP 0605425 B1 EP0605425 B1 EP 0605425B1 EP 92910183 A EP92910183 A EP 92910183A EP 92910183 A EP92910183 A EP 92910183A EP 0605425 B1 EP0605425 B1 EP 0605425B1
Authority
EP
European Patent Office
Prior art keywords
setting motor
control
volumeter
conduit
control conduits
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.)
Revoked
Application number
EP92910183A
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English (en)
French (fr)
Other versions
EP0605425A1 (de
Inventor
Peter Gamborg Gr N
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.)
NORDISK MARINE HYDRAULIK DANMARK AS
Original Assignee
NORDISK MARINE HYDRAULIK DANMARK AS
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Publication date
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Application filed by NORDISK MARINE HYDRAULIK DANMARK AS filed Critical NORDISK MARINE HYDRAULIK DANMARK AS
Publication of EP0605425A1 publication Critical patent/EP0605425A1/de
Application granted granted Critical
Publication of EP0605425B1 publication Critical patent/EP0605425B1/de
Anticipated expiration legal-status Critical
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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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2838—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT with out using position sensors, e.g. by volume flow measurement or pump speed

Definitions

  • the invention relates to a hydraulically operating position indicator for remote indication of the position of the movable member in a double-acting, fluid-pressurized hydraulic setting motor having the same stroke volume in both directions and being connected with two control conduits for the supply and removal of pressure fluid to actuate the movable member for movement in an opening direction or in a closing direction, the position indication being performed by a volumeter positioned remote from the setting motor and having a measuring volume corresponding to the stroke volume of the setting motor.
  • the invention aims at providing a remote indicator system eliminating or considerably diminishing the above mentioned problems of indication errors.
  • a hydralically operating position indicator of the above type is characterized in that a multi-way valve is provided for connecting the two control conduits, in one and the other of two operating positions corresponding to opening and closing, respectively, with a pressure conduit and a tank conduit or, in a neutral state, connecting both of said control conduits with the tank conduit in a free flow communication therewith, the volumeter being coupled to said multi-way valve in such a manner that in both operating positions the volumeter is connected into the control conduit connected with the tank conduit, means being provided for firmly retaining the volumeter in its latest occupied position in said neutal state, and the two control conduits being connected with the working chamber of the setting motor on either side of the movable element member over pilot controlled non-return valve arrangements which in the neutral state prevent pressure fluid from passing from the setting motor to the control conduits which are unpressurized in this position, whereas each of these non-return valve arrangements in the operating position in which the control conduit associated with the other non-return valve arrangement is fluid-pressur
  • the system When a motion of the movable member of the setting motor in the opening and closing direction is completed and the movable element has occupied the desired position, the system is brought into a neutral state in which both control conduits are coupled to tank and the volumeter is retained in the latest occupied position. Due to the above non-return valve arrangements the setting motor is likewise firmly retained in the occupied position by the movable element. As the volumeter is securely retained in the occupied position, oil flowing through the control conduits due to thermal expansion in the setting motor are unable to influence the volumeter, but are passed directly to tank to which the control conduits have free access in the neutral state. Thus, the system is also temperature-compensated.
  • the retainment of the volumeter in the indicator position may advantageously be obtained by a connection with said multi-way valve such that in the neutral state the volumeter is disconnected from both control conduits.
  • throttle valve arrangements causing some time delay of the disconnection may be associated with said multi-way valve to which the volumeter is connected.
  • the invention offers an advantageous possibility of positioning the pilot operated non-return valve arrangements in the vicinity of the setting motor so that the retainment of the setting motor and thus of a valve operated by it, may be effected immediately at the setting motor and the valve, thereby fulfilling the demands increasingly made by classification societies.
  • a setting motor 6 with a working piston 7 is connected through control conduits A2 and B2 connected with a six-way valve 2 over which the conduits lines A2 and B2 may be connected with control strings A1 and B1 which by means of a solenoid-controlled three-way operating valve 1 may be coupled to a pressure conduit P, and a tank conduit T.
  • the three-way valve 1 In the rest position shown in Fig. 2 the three-way valve 1 is de-energized and brought into a centre-position by springs, not shown.
  • control strings A1 and B1 are connected with the tank conduit T, thereby likewise causing the six-way valve 2 to occupy a centre position by bias stress from springs 11 and 12 therein, so that also the control conduits A2 and B2 are unpressurized.
  • the volumeter 3 is locked in its position in this condition by barring the oil inlets, but such a retainment may also be obtained in another way, e.g. by means of a mechanical locking device which is activated when the control strings by the change-over of the valve 1 to the neutral condition become unpressurized or assume a very low pressure.
  • the valve 2 may thus be a four-way valve instead of the illustrated six-way valve.
  • one magnet 13 of the three-way valve is electrically activated, following which valve 1 changes over to the illustrated position.
  • the pressure from conduit P will actuate one of two activation pistons 15, 16 of the six-way valve 2 so that this valve too shifts.
  • the pressure fluid will now be compressed in the B2 conduit until it attains a magnitude capable of moving the piston 7 towards closing. During this pressure build-up no flow is taking place in A2 as piston 7 has not moved.
  • the oil A2 flows to the six-way valve 2 from which the oil is directed through the volumeter 3 which then indicates the actual position of piston 7.
  • valve 1 In a desired movement of piston 7 towards open position as illustrated in Fig. 3, the other magnet 14 of valve 1 actuated and valve 1 changes its position con-currently with shifting of the six-way valve 2, thereby causing conduit A2 to be connected with pressure conduit P.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mobile Radio Communication Systems (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Actuator (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (6)

  1. Hydraulisch betätigter Stellungsanzeiger zur Fernanzeige der Stellung des beweglichen Elements (7) in einem doppeltwirkenden, von Druckflüssigkeit beaufschlagten hydraulischen Stellmotor (6), der in beiden Richtungen dasselbe Hubvolumen aufweist, und an welchen zwei Steuerleitungen (A, B) für Zufuhr und Wegleiten von Druckflüssigkeit zur Aktivierung des beweglichen Elements (7) in Richtung des Öffnens oder Schliessens angeschlossen sind, wobei die Stellungsanzeige von einem vom Stellmotor fernliegenden Volumenmessgerät (3) mit einer dem Hubvolumen des Stellmotors entsprechenden Kapazität durchgeführt wird, dadurch gekennzeichnet, dass ein Mehrwegventil (2; 17, 18) zum Verbinden der zwei Steuerleitungen (A₂, B₂) in der einen oder der anderen von zwei dem Öffnen bzw. Schliessen entsprechenden Arbeitsstellungen an eine Druckleitung (P) und eine Tankleitung (T), oder in einer neutralen Stellung zum Anschluss beider Steuerleitungen (A₂, B₂) an die Tankleitung (T) in freiem Strömungsverlauf damit vorgesehen ist, und dass das Volumenmessgerät (3) an das Mehrwegventil (2) derart angeschlossen ist, dass in beiden Arbeitsstellungen das Volumenmessgerät in die mit der Tankleitung (T) verbundene Steuerleitung eingekoppelt wird, dass Mittel vorgesehen sind, die in der neutralen Stellung das Volumenmessgerät (3) in der zuletzt eingenommenen Stellung festhalten, und dass die zwei Steuerleitungen (A₂, B₂) mit der Arbeitskammer des Stellmotors (6) auf jeder Seite des beweglichen Elements über hilfsgesteuerte Rückschlagventilvorrichtungen (4) verbunden sind, die in der neutralen Stellung Passage von Druckflüssigkeit vom Stellmotor (6) zu den in dieser Position drucklosen Steuerleitungen (A₂, B₂) verhindern, während jede dieser Rückschlagventilvorrichtungen (4) in der Arbeitsstellung, wo die zu der anderen Rückschlagventilvorrichtung gehörige Steuerleitung von Druckflüssigkeit beeinflusst ist, erst für Rückfuhr von Druckflüssigkeit vom Stellmotor (6) geöffnet werden, nachdem in der betreffenden Steuerleitung ein ausreichender Arbeitsdruck erzeugt worden ist.
  2. Stellungsanzeiger nach Anspruch 1, dadurch gekennzeichnet, dass in Verbindung mit jeder Rückschlagventilvorrichtung (4) ein Sicherheitsventil (5) vorgesehen ist, das in der neutralen Stellung bei Auftreten eines thermisch basierten Überdruckes im Stellmotor auf der einen oder anderen Seite des beweglichen Elements ein Entweichen von Druckflüssigkeit vom Stellmotor (6) zu der zugehörigen Steuerleitung erlaubt.
  3. Stellungsanzeiger nach Anspruch 1, dadurch gekennzeichnet, dass das Mehrwegventil (2; 17, 18) in einem vom Stellmotor (6) fernliegenden Steuerpaneel angeordnet und mit einem Dreiweg-Bedienungsventil (1) seriengeschaltet ist, durch welches die Druckleitung (P) und die Tankleitung (T) zu der einen oder anderen der beiden Steuerleitungen gekoppelt werden kann, und umgekehrt, oder die zwei Steuerleitungen (A₂, B₂) zusammengekoppelt und mit der Tankleitung (T) verbunden werden können.
  4. Stellungsanzeiger nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Volumenmessgerät (3) an das Mehrwegventil (2) auf eine solche Weise gekoppelt ist, dass es in der neutralen Stellung von beiden Steuerleitungen (A₂, B₂) abgeschaltet wird.
  5. Stellungsanzeiger nach Anspruch 4, dadurch gekennzeichnet, dass an das Mehrwegventil Drosselventilvorrichtungen (8, 9) für zeitige Verspätung des Abschaltens des Volumenmessgerätes (3) von den Steuerleitungen (A₂, B₂) angeschlossen sind.
  6. Stellungsanzeiger nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die hilfsgesteuerten Rückschlagventilvorrichtungen (4) in der Nähe des Stellmotors (6) angeordnet sind.
EP92910183A 1991-04-29 1992-04-27 Ein positionsanzeiger für einen hydraulischen stellmotor Revoked EP0605425B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK782/91 1991-04-29
DK91782A DK78291D0 (da) 1991-04-29 1991-04-29 Stillingsindikator for en hydraulisk indstillingsmotor
PCT/DK1992/000133 WO1992019871A1 (en) 1991-04-29 1992-04-27 A position indicator for a hydraulic type setting motor

Publications (2)

Publication Number Publication Date
EP0605425A1 EP0605425A1 (de) 1994-07-13
EP0605425B1 true EP0605425B1 (de) 1995-08-09

Family

ID=8097495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910183A Revoked EP0605425B1 (de) 1991-04-29 1992-04-27 Ein positionsanzeiger für einen hydraulischen stellmotor

Country Status (8)

Country Link
EP (1) EP0605425B1 (de)
JP (1) JPH06507467A (de)
AT (1) ATE126326T1 (de)
DE (1) DE69204072D1 (de)
DK (1) DK78291D0 (de)
FI (1) FI934776A0 (de)
NO (1) NO933698D0 (de)
WO (1) WO1992019871A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9500236A (nl) * 1995-02-08 1996-09-02 Sjoerd Meijer Standaanwijzer voor hydraulische vijzel.
US5617771A (en) * 1996-01-11 1997-04-08 Power Team Div. Of Spx Corp. Auto cycle pump
FR2744498B1 (fr) 1996-02-02 1998-03-06 Ksb Sa Selecteur de circuit hydraulique
DE102004039160A1 (de) * 2004-05-21 2005-12-08 Bosch Rexroth Ag Anzeigeeinrichtung
DE102007042757A1 (de) * 2007-09-07 2009-03-26 Pleiger Maschinenbau Gmbh & Co. Kg Verfahren und Vorrichtung zur Stellungsanzeige von hydraulisch betätigten Armaturen
CN102141061A (zh) * 2010-07-07 2011-08-03 中国船舶重工集团公司第七〇四研究所 液压系统间接测量温度压力补偿装置
IT201900020468A1 (it) * 2019-11-06 2021-05-06 Faster Srl Gruppo idraulico multiconnessione integrato

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3014432A1 (de) * 1980-04-15 1981-10-22 Zimmermann & Jansen GmbH, 5160 Düren Einrichtung zur exakten stellungsrueckmeldung eines zweiseitig beaufschlagbaren arbeitskolbens in einem hydraulik-arbeitszylinder

Also Published As

Publication number Publication date
NO933698L (no) 1993-10-14
EP0605425A1 (de) 1994-07-13
JPH06507467A (ja) 1994-08-25
DE69204072D1 (de) 1995-09-14
DK78291D0 (da) 1991-04-29
ATE126326T1 (de) 1995-08-15
FI934776A (fi) 1993-10-28
WO1992019871A1 (en) 1992-11-12
NO933698D0 (no) 1993-10-14
FI934776A0 (fi) 1993-10-28

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