WO2016162328A1 - Linear displacement transducer for a valve slide of a, in particular continuously adjustable, hydraulic valve and hydraulic valve having the linear displacement transducer - Google Patents

Linear displacement transducer for a valve slide of a, in particular continuously adjustable, hydraulic valve and hydraulic valve having the linear displacement transducer Download PDF

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Publication number
WO2016162328A1
WO2016162328A1 PCT/EP2016/057415 EP2016057415W WO2016162328A1 WO 2016162328 A1 WO2016162328 A1 WO 2016162328A1 EP 2016057415 W EP2016057415 W EP 2016057415W WO 2016162328 A1 WO2016162328 A1 WO 2016162328A1
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WO
WIPO (PCT)
Prior art keywords
valve
housing
hydraulic valve
measuring coil
linear transducer
Prior art date
Application number
PCT/EP2016/057415
Other languages
German (de)
French (fr)
Inventor
Stefan DUBRAU
Thorsten Beck
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2016162328A1 publication Critical patent/WO2016162328A1/en

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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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • 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
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F16K31/061—Sliding valves
    • F16K31/0613—Sliding valves with cylindrical slides
    • 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
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
    • F16K31/0679—Electromagnet aspects, e.g. electric supply therefor with more than one energising coil
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/202—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element
    • 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
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool 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
    • 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
    • F15B2013/0409—Position sensing or feedback of the valve member

Definitions

  • the invention relates to a linear transducer according to the preamble of
  • Linear position sensors in particular those which are suitable for detecting the travel of a valve slide of a continuously adjustable slide valve, require an adjustment of the displacement transducer to a middle position and / or zero position of the displacement transducer
  • Valve spool depending on whether a double-acting or single-acting operation of the valve spool is present.
  • Known solutions see for example before adjusting devices that increase a structural length of the transducer, which in turn results in a further increase in a structural length of the slide valve with the transducer.
  • the invention is based on the object to provide a linear transducer for a valve spool one, in particular continuously adjustable, hydraulic valve with reduced space requirements.
  • This object is achieved by a linear displacement transducer having the features of patent claim 1.
  • a further object of the present invention is to provide a hydraulic valve which, despite the use of a linear displacement transducer for a valve slide of a, in particular continuously adjustable, hydraulic valve has a small footprint.
  • Patent claim 8 Advantageous developments of the invention are described in the subclaims.
  • Middle position or a zero position contains a housing and a longitudinally displaceably mounted in the housing measuring coil.
  • the linear transducer according to the present invention includes an actuator and a spring element.
  • the measuring coil is longitudinally displaceable by means of the adjusting device against a spring force of the spring element and thus adjustable in its relative longitudinal position to the valve spool.
  • the adjusting device is designed as a closure cover of the housing. This will make a linear
  • Position transducer made available with a small footprint, since the inventively designed adjusting device not only does not protrude beyond the housing, but also allows the use of a compact housing.
  • the linear transducer has an at least partially, in particular predominantly, arranged in the housing sensor pressure tube on which the measuring coil is mounted longitudinally displaceable. This further contributes to the compact design of the
  • Linear transducer since the sensor pressure tube not only supports the measuring coil, but also provides in its interior space for a one-piece or multi-piece extended valve spool whose movement is detectable in the sensor pressure tube of the measuring coil.
  • the sensor pressure tube in particular with its one end, pressed into a bottom of the housing and sealed fluid-tight.
  • a stable position of the sensor pressure tube is ensured and protected the housing interior from the ingress of fluid.
  • the sensor pressure tube has a high pressure resistance and is thus suitable for high pressure applications.
  • the measuring coil is supported by the spring element against the housing.
  • the spring element may have one or more resilient elements, for example, be formed as a coil spring or a plate spring package.
  • closure lid has an inwardly projecting
  • Sensor pressure tube recorded, in particular that which is opposite to the pressed-one end in the ground.
  • the sensor pressure tube is supported at both ends and thereby stabilized.
  • the housing by means of the closure lid tight, in particular fluid-tight, closed. In this way, the housing interior, in particular the
  • the closure lid is fixable in its position, in particular with at least one grub screw, which can be screwed radially on the circumference of the closure lid in the housing and can clamp a portion of the closure lid.
  • at least one grub screw which can be screwed radially on the circumference of the closure lid in the housing and can clamp a portion of the closure lid.
  • An inventive hydraulic valve in particular continuously adjustable, with a
  • Valve slide contains a linear transducer according to one of claims 1 to 7.
  • the measuring coil is adjustable by means of the closure lid, in particular to a
  • Equipped according to the invention Linear Wegaufford.
  • the advantage of the compact transducer can be used as in the above-mentioned slide valve.
  • a valve bore of the hydraulic valve by means of the housing, in particular by means of its bottom, fluid-tight manner closed.
  • the housing in particular by means of its bottom, fluid-tight manner closed.
  • the housing of the displacement transducer in particular its bottom, a projection projecting into the valve bore and / or a sealing means.
  • the sealing means which is formed for example as an O-ring or as a sealant, for fluidic sealing of the valve bore to the housing between the housing and
  • the linear displacement sensor can be releasably attached to the hydraulic valve, in particular the housing is screwed to the hydraulic valve.
  • the linear transducer is at another end of the linear transducer
  • Hydraulic valve arranged as a solenoid for the valve spool.
  • the measuring coil has a magnetic shield, so that the linear displacement sensor can be mounted close to the lifting magnet.
  • the solenoid is double-acting and the valve spool has a central position.
  • FIG. 1 shows a longitudinal section of a three-dimensional front view of a
  • FIG 2 shows an inventive continuously adjustable hydraulic valve with a valve spool, in which the transducer according to Figure 1 is used. Detailed description of the illustrated embodiments
  • Position transducer 1 has a housing 2, in the bottom 4 of which a sensor pressure tube 6 is pressed in at one end and sealed in a fluid-tight manner.
  • a measuring coil 8 is mounted longitudinally displaceable, wherein the measuring coil 8 is provided here with a magnetic shield 9.
  • the measuring coil 8 is supported on the housing 2 via a spring element 10, in this case a cup spring package.
  • a closure lid 12, by means of which the housing is tightly closed, has an inwardly projecting
  • valve spool 16 of a (not shown here) hydraulic valve is accommodated, wherein the valve spool 16 - extended accordingly - may be made in one piece, or with a valve attached to the valve slide 16 corresponding extension, preferably an armature 17, can be made in several pieces.
  • the movement in the sensor pressure tube 6 movable valve slide 16 and the armature 17 causes with its movement a change in the magnetic field of the measuring coil 8, which is detectable and forwarded to a detection / evaluation and thus interpreted as Wegußer path of the valve spool 16.
  • the armature 17 has a rod core, which upon movement of the
  • the closure lid 12 is designed as an adjusting device, by means of which
  • Measuring coil 8 against a spring force of the spring element 10 is longitudinally displaceable.
  • the closure lid is fixable in position with grub screws 18.
  • the measuring coil 8 is moved against the spring force of the spring element 10 along the sensor pressure tube 6 in the direction of the bottom 4 when screwing the closure cover 12 over the tube extension 14.
  • linear displacement transducer 1 is at a continuously adjustable
  • Valve spool 16 used, as shown in Figure 2 the measuring coil 8 is advantageously set to a center position of the valve spool 16. This is preferably the middle position when the valve spool 16 is not actuated, which is also shown in FIG.
  • the middle position results from an interaction of a first spring 24 and a second spring 26 which act counter to one another on an actuating element 28 of the valve slide 16 and set in the de-energized state of the solenoid 22 just the center position of the valve spool 16.
  • an inlet 30 of the hydraulic valve 20 is closed by means of the valve spool 16 and thus a
  • Spring 24 is a fluid connection made from the inlet 30 to the first outlet 32 and a fluid connection from the second outlet 34 to a (not shown) pressure medium sinks.
  • the valve spool 16 is arranged in a valve bore 36 of the hydraulic valve 20.
  • the valve bore 36 is closed in a fluid-tight manner by means of the housing 2, in particular by means of its bottom 4, the base 4 having an extension 38 projecting into the valve bore 36.
  • Hydraulic valve 20 is a sealing means 40, here an O-ring, arranged for sealing the valve bore 36 to the housing 2.
  • the linear transducer 1 is arranged at another end of the hydraulic valve 20 than the solenoid 22, so that a magnetic shield of the measuring coil 8 is not required.
  • a linear transducer for a hydraulic valve in particular continuously adjustable and slide-type, wherein by means of the adjusting device contained in the displacement transducer, a measuring coil of the transducer to a central position of the
  • Valve spool is adjustable in the hydraulic valve.
  • the actuator is as a

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

The invention relates to a linear displacement transducer for a valve slide (16) of a, in particular continuously adjustable, hydraulic valve (20), wherein the valve slide (16) has in particular a central position or a zero position. The linear displacement transducer has a housing (2), a measuring coil (8) mounted in the housing (2) such that it can be longitudinally moved, a setting device (12) and a spring element (10), wherein the measuring coil (8) can be longitudinally moved against a spring force of the spring element (10) by means of the setting device (12). The setting device is configured as a closure cover (12) of the housing (2). The invention also relates to a hydraulic valve, which is in particular continuously adjustable, having a valve slide (16) and having a linear displacement transducer, wherein the measuring coil (8) can be adjusted by means of the closure cover (12), in particular to a central position or a zero position of the valve slide (16).

Description

Linearer Wegaufnehmer für einen Ventilschieber eines, insbesondere stetig verstellbaren, Hvdraulikventils und Hvdraulikventil mit dem linearen Wegaufnehmer  Linear position transducer for a valve slide of a, in particular continuously adjustable, Hvdraulikventils and Hvdraulikventil with the linear position transducer
Beschreibung description
Gebiet der Erfindung Field of the invention
Die Erfindung betrifft einen linearen Wegaufnehmer gemäß dem Oberbegriff des The invention relates to a linear transducer according to the preamble of
Patentanspruchs 1 und ein Hydraulikventil mit dem linearen Wegaufnehmer gemäß dem Oberbegriff des Patentanspruchs 8. Patent claim 1 and a hydraulic valve with the linear displacement sensor according to the preamble of claim 8.
Hintergrund der Erfindung Lineare Wegaufnehmer, insbesondere solche, die dazu geeignet sind, den Verfahrweg eines Ventilschiebers eines stetig verstellbaren Schieberventils zu erfassen, erfordern eine Justierung des Wegaufnehmers an eine Mittelstellung und/oder Nullstellung des Background of the Invention Linear position sensors, in particular those which are suitable for detecting the travel of a valve slide of a continuously adjustable slide valve, require an adjustment of the displacement transducer to a middle position and / or zero position of the displacement transducer
Ventilschiebers, je nachdem, ob eine doppeltwirkende oder einfachwirkende Betätigung des Ventilschiebers vorliegt. Bekannte Lösungen sehen dafür beispielsweise Stelleinrichtungen vor, die eine bauliche Länge des Wegaufnehmers vergrößern, was wiederum in einer weiteren Erhöhung einer baulichen Länge des Schieberventils mit dem Wegaufnehmer resultiert. Valve spool, depending on whether a double-acting or single-acting operation of the valve spool is present. Known solutions see for example before adjusting devices that increase a structural length of the transducer, which in turn results in a further increase in a structural length of the slide valve with the transducer.
Insbesondere bei Hydraulikventilen in Blockbauweise ist dies nachteilig, da sich dadurch vorgegebene Rastermaße nicht einhalten lassen oder zumindest verschieben. This is disadvantageous, in particular in the case of hydraulic valves in block construction, since predetermined grid dimensions can not be maintained or at least displaced.
Offenbarung der Erfindung Dem gegenüber liegt der Erfindung die Aufgabe zu Grunde, einen linearen Wegaufnehmer für einen Ventilschieber eines, insbesondere stetig verstellbaren, Hydraulikventils mit verringertem Platzbedarf zu schaffen. Diese Aufgabe wird gelöst durch einen linearen Wegaufnehmer mit den Merkmalen des Patentanspruchs 1 . Disclosure of the invention In contrast, the invention is based on the object to provide a linear transducer for a valve spool one, in particular continuously adjustable, hydraulic valve with reduced space requirements. This object is achieved by a linear displacement transducer having the features of patent claim 1.
Eine weitere Aufgabe der vorliegenden Erfindung ist es, ein Hydraulikventil zur Verfügung zu stellen, das trotz Verwendung eines linearen Wegaufnehmers für einen Ventilschieber eines, insbesondere stetig verstellbaren, Hydraulikventils einen geringen Platzbedarf aufweist. A further object of the present invention is to provide a hydraulic valve which, despite the use of a linear displacement transducer for a valve slide of a, in particular continuously adjustable, hydraulic valve has a small footprint.
Diese Aufgabe wird gelöst durch ein Hydraulikventil mit den Merkmalen des This object is achieved by a hydraulic valve with the features of
Patentanspruchs 8. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben. Patent claim 8. Advantageous developments of the invention are described in the subclaims.
Ein erfindungsgemäßer linearer Wegaufnehmer für einen Ventilschieber eines, insbesondere stetig verstellbaren, Hydraulikventils, wobei der Ventilschieber insbesondere eine An inventive linear transducer for a valve spool of a, in particular continuously adjustable, hydraulic valve, wherein the valve spool in particular a
Mittelstellung oder eine Nullstellung hat, enthält ein Gehäuse und eine in dem Gehäuse längsverschiebbar gelagerte Mess-Spule. Weiter enthält der lineare Wegaufnehmer gemäß der vorliegenden Erfindung eine Stelleinrichtung und ein Federelement. Die Mess-Spule ist mittels der Stelleinrichtung gegen eine Federkraft des Federelements längsverschiebbar und damit in ihrer relativen Längsposition zum Ventilschieber einstellbar. Die Stelleinrichtung ist als ein Verschlussdeckel des Gehäuses ausgebildet. Dadurch wird ein linearer Middle position or a zero position, contains a housing and a longitudinally displaceably mounted in the housing measuring coil. Further, the linear transducer according to the present invention includes an actuator and a spring element. The measuring coil is longitudinally displaceable by means of the adjusting device against a spring force of the spring element and thus adjustable in its relative longitudinal position to the valve spool. The adjusting device is designed as a closure cover of the housing. This will make a linear
Wegaufnehmer mit geringem Platzbedarf zur Verfügung gestellt, da die erfindungsgemäß ausgebildete Stelleinrichtung nicht nur nicht über das Gehäuse hinausragt, sondern auch weiterhin die Verwendung eines kompakten Gehäuses erlaubt. Position transducer made available with a small footprint, since the inventively designed adjusting device not only does not protrude beyond the housing, but also allows the use of a compact housing.
Weiter vorteilhaft ist die Verwendung einer sehr kompakten und sehr kurz bauenden Another advantage is the use of a very compact and very short-building
Mess-Spule. Dies trägt weiter dazu bei, das Gehäuse baulich kompakt zu halten und unterstützt somit weiter die eine Aufgabe der Erfindung, einen linearen Wegaufnehmer mit verringertem Platzbedarf zu schaffen. Vorteilhafterweise weist der lineare Wegaufnehmer ein zumindest teilweise, insbesondere überwiegend, in dem Gehäuse angeordnetes Sensor-Druckrohr auf, auf dem die Mess-Spule längsverschiebbar gelagert ist. Dies trägt weiter zu der kompakten Bauweise des Measuring coil. This further helps to keep the housing structurally compact and thus further supports the one object of the invention to provide a linear transducer with reduced footprint. Advantageously, the linear transducer has an at least partially, in particular predominantly, arranged in the housing sensor pressure tube on which the measuring coil is mounted longitudinally displaceable. This further contributes to the compact design of the
erfindungsgemäßen linearen Wegaufnehmers bei, da das Sensor-Druckrohr nicht nur die Mess-Spule lagert, sondern auch in seinem Inneren Platz bietet für einen einstückig oder mehrstückig verlängerten Ventilschieber, dessen Bewegung in dem Sensor-Druckrohr von der Mess-Spule detektierbar ist. Linear transducer according to the invention, since the sensor pressure tube not only supports the measuring coil, but also provides in its interior space for a one-piece or multi-piece extended valve spool whose movement is detectable in the sensor pressure tube of the measuring coil.
Vorteilhafterweise ist das Sensor-Druckrohr, insbesondere mit seinem einen Ende, in einen Boden des Gehäuses eingepresst und fluiddicht abgedichtet. Somit ist eine stabile Position des Sensor-Druckrohrs gewährleistet und das Gehäuseinnere vor eindringendem Fluid geschützt. Advantageously, the sensor pressure tube, in particular with its one end, pressed into a bottom of the housing and sealed fluid-tight. Thus, a stable position of the sensor pressure tube is ensured and protected the housing interior from the ingress of fluid.
Weiter vorteilhaft weist das Sensor-Druckrohr eine hohe Druckfestigkeit auf und ist somit für Hochdruckanwendungen geeignet. Further advantageously, the sensor pressure tube has a high pressure resistance and is thus suitable for high pressure applications.
Vorteilhafterweise ist die Mess-Spule über das Federelement gegen das Gehäuse abgestützt. Das Federelement kann ein oder mehrere federnde Elemente aufweisen, beispielsweise als eine Schraubenfeder oder ein Tellerfederpaket ausgebildet sein. Advantageously, the measuring coil is supported by the spring element against the housing. The spring element may have one or more resilient elements, for example, be formed as a coil spring or a plate spring package.
Weiter vorteilhaft weist der Verschlussdeckel einen nach innen abstehenden Further advantageously, the closure lid has an inwardly projecting
schulterförmigen Rohrfortsatz auf, mit dem der Verschlussdeckel an der Mess-Spule anliegt. Durch das Zusammenspiel des an der Mess-Spule anliegendem Rohrfortsatzes mit der federnden Abstützung der Mess-Spule an dem Gehäuse ist gewährleistet, dass bei einer axialen Bewegung des Verschlussdeckels die Mess-Spule dieser Bewegung folgt und so auf platzsparende Art und Weise auf insbesondere eine Mittelstellung oder eine Nullstellung des Ventilschiebers des Hydraulikventils, für den der Wegaufnehmer geeignet ist, einstellbar ist. shoulder-shaped tube extension, with which the closure lid rests against the measuring coil. The interaction of the voltage applied to the measuring coil tube extension with the resilient support of the measuring coil on the housing ensures that with an axial movement of the closure lid, the measuring coil follows this movement and so in a space-saving manner in particular a middle position or a zero position of the valve spool of the hydraulic valve, for which the displacement sensor is suitable, is adjustable.
Weiter vorteilhaft ist in dem schulterförmigen Rohrfortsatz ein anderes Ende des Another advantage is in the shoulder-shaped tube extension another end of the
Sensor-Druckrohrs aufgenommen, insbesondere dasjenige, das dem in den Boden eingepressten einen Ende gegenüberliegt. Somit ist das Sensor-Druckrohr an beiden Enden gestützt und dadurch stabilisiert. Vorteilhafterweise ist das Gehäuse mittels des Verschlussdeckels dicht, insbesondere fluiddicht, verschließbar. Auf diese Weise ist das Gehäuseinnere, insbesondere die Sensor pressure tube recorded, in particular that which is opposite to the pressed-one end in the ground. Thus, the sensor pressure tube is supported at both ends and thereby stabilized. Advantageously, the housing by means of the closure lid tight, in particular fluid-tight, closed. In this way, the housing interior, in particular the
Mess-Spule, vor Verschmutzung geschützt und vor diesbezüglicher Measuring coil, protected against contamination and before related
Funktionsbeeinträchtigung bewahrt. Functional impairment preserved.
Vorteilhafterweise ist der Verschlussdeckel in seiner Position fixierbar, insbesondere mit mindestens einer Madenschraube, die radial am Umfang des Verschlussdeckels in das Gehäuse eingeschraubt sein kann und einen Abschnitt des Verschlussdeckels klemmen kann. Somit ist eine unbeabsichtigte Veränderung der Position des Verschlussdeckels und damit einer unbeabsichtigten Veränderung der Einstellung der Mess-Spule verhindert. Advantageously, the closure lid is fixable in its position, in particular with at least one grub screw, which can be screwed radially on the circumference of the closure lid in the housing and can clamp a portion of the closure lid. Thus, an unintentional change in the position of the closure lid and thus an unintentional change in the setting of the measuring coil is prevented.
Ein erfindungsgemäßes Hydraulikventil, insbesondere stetig verstellbar, mit einem An inventive hydraulic valve, in particular continuously adjustable, with a
Ventilschieber enthält einen linearen Wegaufnehmer nach einem der Ansprüche 1 bis 7. Die Mess-Spule ist mittels des Verschlussdeckels einstellbar, insbesondere auf eine Valve slide contains a linear transducer according to one of claims 1 to 7. The measuring coil is adjustable by means of the closure lid, in particular to a
Mittelstellung oder eine Nullstellung des Ventilschiebers. Dadurch wird ein Hydraulikventil mit Ventilschieber geschaffen, das bei Verwendung des erfindungsgemäßen kompakt bauenden Wegaufnehmers einen geringen Platzbedarf hat. Center position or zero position of the valve spool. As a result, a hydraulic valve with valve slide is created, which has a small footprint when using the compact transducer according to the invention.
Alternativ dazu ist ein, insbesondere stetig verstellbares, Sitzventil mit dem Alternatively, a, in particular continuously adjustable, seat valve with the
erfindungsgemäßen linearen Wegaufnehmer ausrüstbar. Hier ist auch der Vorteil des kompakt bauenden Wegaufnehmers nutzbar wie bei dem oben genannten Schieberventil. Equipped according to the invention Linear Wegaufnehmer. Here also the advantage of the compact transducer can be used as in the above-mentioned slide valve.
Vorteilhafterweise ist eine Ventilbohrung des Hydraulikventils mittels des Gehäuses, insbesondere mittels seines Bodens, fluiddicht verschließbar. Auf diese Weise ist kein extra Bauteil zum Abdichten der Ventilbohrung erforderlich und zudem ist der Wegaufnehmer für den Ventilschieber zugänglich. Advantageously, a valve bore of the hydraulic valve by means of the housing, in particular by means of its bottom, fluid-tight manner closed. In this way, no extra component for sealing the valve bore is required and also the transducer for the valve spool is accessible.
Vorteilhafterweise weist das Gehäuse des Wegaufnehmers, insbesondere sein Boden, einen in die Ventilbohrung hineinragenden Fortsatz und/oder ein Dichtmittel auf. Insbesondere ist das Dichtmittel, das beispielsweise als O-Ring oder als Dichtmasse ausgebildet ist, zur fluidischen Abdichtung der Ventilbohrung zu dem Gehäuse zwischen Gehäuse und Advantageously, the housing of the displacement transducer, in particular its bottom, a projection projecting into the valve bore and / or a sealing means. In particular, the sealing means, which is formed for example as an O-ring or as a sealant, for fluidic sealing of the valve bore to the housing between the housing and
Ventilbohrung angeordnet. Der lineare Wegaufnehmer kann an dem Hydraulikventil lösbar befestigt sein, insbesondere ist das Gehäuse an dem Hydraulikventil angeschraubt. Valve bore arranged. The linear displacement sensor can be releasably attached to the hydraulic valve, in particular the housing is screwed to the hydraulic valve.
Vorteilhafterweise ist der lineare Wegaufnehmer an einem anderen Ende des Advantageously, the linear transducer is at another end of the
Hydraulikventils angeordnet als ein Hubmagnet für den Ventilschieber. Somit ist wegen des Abstandes eine magnetische Abschirmung der Mess-Spule nicht erforderlich und das Hydraulikventil mit dem Wegaufnehmer lässt sich kostengünstig und einfach herstellen. Hydraulic valve arranged as a solenoid for the valve spool. Thus, because of the distance, a magnetic shield of the measuring coil is not required and the hydraulic valve with the transducer can be produced inexpensively and easily.
Vorteilhafterweise weist die Mess-Spule eine magnetische Abschirmung auf, so dass der lineare Wegaufnehmer nahe am Hubmagneten montierbar ist. Advantageously, the measuring coil has a magnetic shield, so that the linear displacement sensor can be mounted close to the lifting magnet.
Vorteilhafterweise ist der Hubmagnet doppeltwirkend und der Ventilschieber weist eine Mittelstellung auf. Kurze Beschreibung der Zeichnungen Advantageously, the solenoid is double-acting and the valve spool has a central position. Brief description of the drawings
Ein Ausführungsbeispiel der Erfindung wird im Folgenden anhand schematischer An embodiment of the invention will be described below with reference to schematic
Zeichnungen näher erläutert. Es zeigen: Figur 1 in einem Längsschnitt eine dreidimensionale Vorderansicht eines Drawings explained in more detail. 1 shows a longitudinal section of a three-dimensional front view of a
erfindungsgemäßen Wegaufnehmers, und according to the invention, and
Figur 2 ein erfindungsgemäßes stetig verstellbares Hydraulikventil mit einem Ventilschieber, bei dem der Wegaufnehmer gemäß Figur 1 zum Einsatz kommt. Detaillierte Beschreibung der dargestellten Ausführungsformen  Figure 2 shows an inventive continuously adjustable hydraulic valve with a valve spool, in which the transducer according to Figure 1 is used. Detailed description of the illustrated embodiments
Das in Figur 1 dargestellte Ausführungsbeispiel eines erfindungsgemäßen linearen The illustrated in Figure 1 embodiment of a linear according to the invention
Wegaufnehmers 1 hat ein Gehäuse 2, in dessen Boden 4 ein Sensor-Druckrohr 6 mit seinem einen Ende eingepresst und fluiddicht abgedichtet ist. Auf dem Sensor-Druckrohr 6 ist eine Mess-Spule 8 längsverschiebbar gelagert, wobei die Mess-Spule 8 hier mit einer magnetischen Abschirmung 9 versehen ist. Die Mess-Spule 8 ist über ein Federelement 10, hier ein Tellerfederpaket, an dem Gehäuse 2 abgestützt. Ein Verschlussdeckel 12, mittels dessen das Gehäuse dicht verschließbar ist, hat einen nach innen abstehenden Position transducer 1 has a housing 2, in the bottom 4 of which a sensor pressure tube 6 is pressed in at one end and sealed in a fluid-tight manner. On the sensor pressure tube 6, a measuring coil 8 is mounted longitudinally displaceable, wherein the measuring coil 8 is provided here with a magnetic shield 9. The measuring coil 8 is supported on the housing 2 via a spring element 10, in this case a cup spring package. A closure lid 12, by means of which the housing is tightly closed, has an inwardly projecting
schulterförmigen Rohrfortsatz 14, mit dem der Verschlussdeckel 12 an der Mess-Spule 8 anliegt. In dem Rohrfortsatz 14 ist das Sensor-Druckrohr 6 mit seinem anderen Ende aufgenommen. shoulder-shaped tube extension 14, with which the closure lid 12 on the measuring coil. 8 is applied. In the tube extension 14, the sensor pressure tube 6 is received with its other end.
In dem Sensor-Druckrohr 6 ist ein Endabschnitt eines Ventilschiebers 16 eines (hier nicht dargestellten) Hydraulikventils aufgenommen, wobei der Ventilschieber 16 - entsprechend verlängert - einstückig ausgeführt sein kann, oder mit einer an dem Ventilschieber 16 befestigten entsprechenden Verlängerung, bevorzugt einem Anker 17, mehrstückig ausgeführt sein kann. Der in dem Sensor-Druckrohr 6 bewegliche Ventilschieber 16 beziehungsweise der Anker 17 bewirkt mit seiner Bewegung eine Veränderung in dem Magnetfeld der Mess-Spule 8, die detektierbar und an eine Erfassungs-/Auswerteeinrichtung weiterleitbar und somit als zurückgelegter Weg des Ventilschiebers 16 interpretierbar ist. An einem Endabschnitt weist der Anker 17 einen Stabkern auf, der bei Bewegung des In the sensor pressure tube 6, an end portion of a valve spool 16 of a (not shown here) hydraulic valve is accommodated, wherein the valve spool 16 - extended accordingly - may be made in one piece, or with a valve attached to the valve slide 16 corresponding extension, preferably an armature 17, can be made in several pieces. The movement in the sensor pressure tube 6 movable valve slide 16 and the armature 17 causes with its movement a change in the magnetic field of the measuring coil 8, which is detectable and forwarded to a detection / evaluation and thus interpreted as zurückgelegter path of the valve spool 16. At one end portion, the armature 17 has a rod core, which upon movement of the
Ankers 17 die Veränderung in dem Magnetfeld der Mess-Spule 8 verstärkt. Der Verschlussdeckel 12 ist als eine Stelleinrichtung ausgebildet, mittels der die Armature 17, the change in the magnetic field of the measuring coil 8 amplified. The closure lid 12 is designed as an adjusting device, by means of which
Mess-Spule 8 gegen eine Federkraft des Federelements 10 längsverschiebbar ist. Der Verschlussdeckel ist in seiner Position mit Madenschrauben 18 fixierbar.  Measuring coil 8 against a spring force of the spring element 10 is longitudinally displaceable. The closure lid is fixable in position with grub screws 18.
Im dargestellten Ausführungsbeispiel wird beim Hineinschrauben des Verschlussdeckels 12 über den Rohrfortsatz 14 die Mess-Spule 8 gegen die Federkraft des Federelements 10 entlang des Sensor-Druckrohrs 6 in Richtung des Bodens 4 verschoben. Beim In the illustrated embodiment, the measuring coil 8 is moved against the spring force of the spring element 10 along the sensor pressure tube 6 in the direction of the bottom 4 when screwing the closure cover 12 over the tube extension 14. At the
Herausschrauben des Verschlussdeckels 12 wird wegen der Federkraft des Unscrewing the cap 12 is due to the spring force of
Federelements 10 die Mess-Spule 8 entlang des Sensor-Druckrohrs 6 in Richtung des Verschlussdeckels 12 verschoben. Somit ist eine Längsposition der Mess-Spule 8 auf platzsparende Art und Weise einstellbar. Spring element 10, the measuring coil 8 along the sensor pressure tube 6 in the direction of the closure lid 12 is moved. Thus, a longitudinal position of the measuring coil 8 can be adjusted in a space-saving manner.
Wird der erfindungsgemäße lineare Wegaufnehmer 1 bei einem stetig verstellbaren If the linear displacement transducer 1 according to the invention is at a continuously adjustable
Hydraulikventil 20 mit doppeltwirkendem Hubmagneten 22 für die Betätigung des Hydraulic valve 20 with double-acting solenoid 22 for the actuation of
Ventilschiebers 16 verwendet, so wie in Figur 2 dargestellt, wird die Mess-Spule 8 vorteilhafterweise auf eine Mittelstellung des Ventilschiebers 16 eingestellt. Bevorzugt handelt es sich dabei um die Mittelstellung bei unbetätigtem Ventilschieber 16, die auch in Figur 2 gezeigt ist. Die Mittelstellung ergibt sich aus einem Zusammenwirken einer ersten Feder 24 und einer zweiten Feder 26, die einander entgegengerichtet auf ein Betätigungselement 28 des Ventilschiebers 16 wirken und in unbestromtem Zustand des Hubmagneten 22 eben die Mittelstellung des Ventilschiebers 16 einstellen. In der Mittelstellung ist ein Zulauf 30 des Hydraulikventils 20 mittels des Ventilschiebers 16 geschlossen und somit eine Valve spool 16 used, as shown in Figure 2, the measuring coil 8 is advantageously set to a center position of the valve spool 16. This is preferably the middle position when the valve spool 16 is not actuated, which is also shown in FIG. The middle position results from an interaction of a first spring 24 and a second spring 26 which act counter to one another on an actuating element 28 of the valve slide 16 and set in the de-energized state of the solenoid 22 just the center position of the valve spool 16. In the middle position, an inlet 30 of the hydraulic valve 20 is closed by means of the valve spool 16 and thus a
Fluidverbindung zwischen dem Zulauf 30 und einem ersten Ablauf 32 und/oder einem zweiten Ablauf 34 unterbrochen. Mittels des erfindungsgemäßen Wegaufnehmers 1 ist, wie zu Figur 1 beschrieben, die Mess-Spule 8 auf die Mittelstellung einstellbar. Bei Betätigung des Ventilschiebers 16 mittels des Hubmagneten 22 gegen die erste  Fluid communication between the inlet 30 and a first outlet 32 and / or a second outlet 34 interrupted. By means of the displacement transducer 1 according to the invention, as described for Figure 1, the measuring coil 8 can be adjusted to the center position. Upon actuation of the valve spool 16 by means of the solenoid 22 against the first
Feder 24 ist eine Fluidverbindung vom Zulauf 30 zum ersten Ablauf 32 hergestellt und eine Fluidverbindung vom zweiten Ablauf 34 zu einer (nicht dargestellten) Druckmittelsenke. Bei Betätigung des Ventilschiebers 16 mittels des Hubmagneten 22 gegen die zweite Feder 26 ist eine Fluidverbindung vom Zulauf 30 zum zweiten Ablauf 34 hergestellt und eine  Spring 24 is a fluid connection made from the inlet 30 to the first outlet 32 and a fluid connection from the second outlet 34 to a (not shown) pressure medium sinks. Upon actuation of the valve spool 16 by means of the solenoid 22 against the second spring 26, a fluid connection from the inlet 30 to the second outlet 34 is made and a
Fluidverbindung vom ersten Ablauf 32 zu der Druckmittelsenke. Fluid connection from the first drain 32 to the pressure medium sink.
Der Ventilschieber 16 ist in einer Ventilbohrung 36 des Hydraulikventils 20 angeordnet. Die Ventilbohrung 36 ist mittels des Gehäuses 2, insbesondere mittels seines Bodens 4, fluiddicht verschließbar, wobei der Boden 4 einen in die Ventilbohrung 36 hineinragenden Fortsatz 38 aufweist. Zwischen dem Gehäuse 2 - insbesondere dem Boden 4 - und demThe valve spool 16 is arranged in a valve bore 36 of the hydraulic valve 20. The valve bore 36 is closed in a fluid-tight manner by means of the housing 2, in particular by means of its bottom 4, the base 4 having an extension 38 projecting into the valve bore 36. Between the housing 2 - in particular the bottom 4 - and the
Hydraulikventil 20 ist ein Dichtmittel 40, hier ein O-Ring, zum Abdichten der Ventilbohrung 36 zu dem Gehäuse 2 angeordnet. Hydraulic valve 20 is a sealing means 40, here an O-ring, arranged for sealing the valve bore 36 to the housing 2.
Der lineare Wegaufnehmer 1 ist an einem anderen Ende des Hydraulikventils 20 angeordnet als der Hubmagnet 22, so dass eine magnetische Abschirmung der Mess-Spule 8 nicht erforderlich ist. The linear transducer 1 is arranged at another end of the hydraulic valve 20 than the solenoid 22, so that a magnetic shield of the measuring coil 8 is not required.
Offenbart ist ein linearer Wegaufnehmer für ein Hydraulikventil, insbesondere stetig verstellbar und in Schieberbauweise, wobei mittels der in dem Wegaufnehmer enthaltenen Stelleinrichtung eine Mess-Spule des Wegaufnehmers auf eine Mittelstellung des Disclosed is a linear transducer for a hydraulic valve, in particular continuously adjustable and slide-type, wherein by means of the adjusting device contained in the displacement transducer, a measuring coil of the transducer to a central position of the
Ventilschiebers in dem Hydraulikventil einstellbar ist. Die Stelleinrichtung ist als ein Valve spool is adjustable in the hydraulic valve. The actuator is as a
Verschlussdeckel eines Gehäuses des Wegaufnehmers ausgebildet. Weiter ist ein Cover formed a housing of the transducer. Next is one
Hydraulikventil mit einem solchen Wegaufnehmer offenbart. Bezugszeichenliste Hydraulic valve disclosed with such a transducer. LIST OF REFERENCE NUMBERS
1 Linearer Wegaufnehmer 1 linear transducer
2 Gehäuse  2 housings
4 Boden  4 floor
6 Sensor-Druckrohr  6 sensor pressure tube
8 Mess-Spule  8 measuring coil
9 Abschirmung  9 shielding
10 Federelement / Tellerfedern  10 spring element / disc springs
12 Stelleinrichtung / Verschlussdeckel 12 adjusting device / closure cover
14 Rohrfortsatz 14 pipe extension
16 Ventilschieber  16 valve spool
17 Anker / Stabkern  17 anchor / bar core
18 Madenschraube  18 grub screw
20 Hydraulikventil  20 hydraulic valve
22 Hubmagnet  22 lifting magnet
24 erste Feder  24 first spring
26 zweite Feder  26 second spring
28 Betätigungselement des Ventilschiebers 28 actuator of the valve spool
30 Zulauf 30 inlet
32 erster Ablauf  32 first sequence
34 zweiter Ablauf  34 second course
36 Ventilbohrung  36 valve bore
38 Fortsatz  38 extension
40 Dichtmittel  40 sealants

Claims

Patentansprüche claims
1. Linearer Wegaufnehmer für einen Ventilschieber (16) eines, insbesondere stetig 1. Linear transducer for a valve spool (16) one, especially steadily
verstellbaren, Hydraulikventils (20), wobei der Ventilschieber (16) insbesondere eine Mittelstellung oder eine Nullstellung hat, mit einem Gehäuse (2), einer in dem  adjustable, hydraulic valve (20), wherein the valve slide (16) in particular has a middle position or a zero position, with a housing (2), one in the
Gehäuse (2) längsverschiebbar gelagerten Mess-Spule (8), einer Stelleinrichtung (12) und einem Federelement (10), wobei die Mess-Spule (8) mittels der  Housing (2) longitudinally displaceably mounted measuring coil (8), an adjusting device (12) and a spring element (10), wherein the measuring coil (8) by means of
Stelleinrichtung (12) gegen eine Federkraft des Federelements (10) längsverschiebbar ist, wobei die Stelleinrichtung als ein Verschlussdeckel (12) des Gehäuses (2) ausgebildet ist.  Adjusting device (12) against a spring force of the spring element (10) is longitudinally displaceable, wherein the adjusting device is designed as a closure cover (12) of the housing (2).
2. Linearer Wegaufnehmer nach Anspruch 1 , mit einem zumindest teilweise in dem 2. Linear transducer according to claim 1, with an at least partially in the
Gehäuse (2) angeordneten Sensor-Druckrohr (6), auf dem die Mess-Spule (8) längsverschiebbar gelagert ist.  Housing (2) arranged sensor pressure tube (6) on which the measuring coil (8) is mounted longitudinally displaceable.
3. Linearer Wegaufnehmer nach Anspruch 2, wobei das Sensor-Druckrohr (6) in einen Boden (4) des Gehäuses (2) eingepresst und fluiddicht abgedichtet ist. 3. Linear transducer according to claim 2, wherein the sensor pressure tube (6) in a bottom (4) of the housing (2) is pressed and sealed fluid-tight.
4. Linearer Wegaufnehmer nach einem der Ansprüche 1 bis 3, wobei die Mess-Spule (8) über das Federelement (10) gegen das Gehäuse (2) abgestützt ist. 4. Linear transducer according to one of claims 1 to 3, wherein the measuring coil (8) via the spring element (10) is supported against the housing (2).
5. Linearer Wegaufnehmer nach einem der vorhergehenden Ansprüche, wobei der 5. Linear transducer according to one of the preceding claims, wherein the
Verschlussdeckel (12) einen nach innen abstehenden schulterförmigen  Closure lid (12) has an internally projecting shoulder-shaped
Rohrfortsatz (14) aufweist, mit dem der Verschlussdeckel (12) an der Mess-Spule (8) anliegt.  Pipe extension (14), with which the closure cover (12) against the measuring coil (8).
6. Linearer Wegaufnehmer nach einem der vorhergehenden Ansprüche, wobei das 6. Linear transducer according to one of the preceding claims, wherein the
Gehäuse (2) mittels des Verschlussdeckels (12) dicht verschließbar ist.  Housing (2) by means of the closure cover (12) is tightly closed.
7. Linearer Wegaufnehmer nach einem der vorhergehenden Ansprüche, wobei der 7. Linear transducer according to one of the preceding claims, wherein the
Verschlussdeckel (12) in seiner Position fixierbar ist. Closure cover (12) is fixable in position.
8. Hydraulikventil, insbesondere stetig verstellbar, mit einem Ventilschieber (16) und mit einem linearen Wegaufnehmer nach einem der Ansprüche 1 bis 7, wobei die 8. Hydraulic valve, in particular continuously adjustable, with a valve spool (16) and with a linear transducer according to one of claims 1 to 7, wherein the
Mess-Spule (8) mittels des Verschlussdeckels (12) längsverschiebbar ist,  Measuring coil (8) by means of the closure cover (12) is longitudinally displaceable,
insbesondere auf eine Mittelstellung oder eine Nullstellung des Ventilschiebers (16).  in particular to a middle position or a zero position of the valve slide (16).
9. Hydraulikventil nach Anspruch 8, wobei eine Ventilbohrung (24) des Hydraulikventils mittels des Gehäuses (2), insbesondere mittels seines Bodens (4), fluiddicht verschließbar ist. 9. A hydraulic valve according to claim 8, wherein a valve bore (24) of the hydraulic valve by means of the housing (2), in particular by means of its bottom (4), fluid-tight manner is closed.
10. Hydraulikventil nach Anspruch 9, wobei das Gehäuse (2), insbesondere sein 10. Hydraulic valve according to claim 9, wherein the housing (2), in particular be
Boden (4), einen in die Ventilbohrung (24) hineinragenden Fortsatz (26) und/oder ein Dichtmittel (28) aufweist.  Base (4), one in the valve bore (24) protruding extension (26) and / or a sealing means (28).
1 1. Hydraulikventil nach einem der Ansprüche 8 bis 10, wobei der lineare Wegaufnehmer an einem anderen Ende des Hydraulikventils angeordnet ist als ein Hubmagnet (22) für den Ventilschieber (16). 1 1. A hydraulic valve according to one of claims 8 to 10, wherein the linear displacement sensor is arranged at another end of the hydraulic valve as a solenoid (22) for the valve spool (16).
12. Hydraulikventil nach Anspruch 1 1 , wobei der Hubmagnet (22) doppeltwirkend ist und wobei der Ventilschieber (16) eine Mittelstellung aufweist. 12. A hydraulic valve according to claim 1 1, wherein the solenoid (22) is double-acting and wherein the valve slide (16) has a central position.
PCT/EP2016/057415 2015-04-10 2016-04-05 Linear displacement transducer for a valve slide of a, in particular continuously adjustable, hydraulic valve and hydraulic valve having the linear displacement transducer WO2016162328A1 (en)

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CN114787547A (en) * 2020-03-09 2022-07-22 金子产业株式会社 Electromagnetic valve

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CN111120721A (en) * 2020-01-22 2020-05-08 中国核动力研究设计院 Valve position measuring system and valve position sensor for safety valve of voltage stabilizer

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CN114787547A (en) * 2020-03-09 2022-07-22 金子产业株式会社 Electromagnetic valve
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