EP1390959A2 - Ensemble magnetique - Google Patents

Ensemble magnetique

Info

Publication number
EP1390959A2
EP1390959A2 EP02740320A EP02740320A EP1390959A2 EP 1390959 A2 EP1390959 A2 EP 1390959A2 EP 02740320 A EP02740320 A EP 02740320A EP 02740320 A EP02740320 A EP 02740320A EP 1390959 A2 EP1390959 A2 EP 1390959A2
Authority
EP
European Patent Office
Prior art keywords
magnet arrangement
arrangement according
closure part
armature
displacement sensor
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.)
Granted
Application number
EP02740320A
Other languages
German (de)
English (en)
Other versions
EP1390959B1 (fr
Inventor
Klaus HÖFLING
Hans-Georg Schubert
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.)
Bosch Rexroth AG
Original Assignee
Bosch Rexroth AG
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 Bosch Rexroth AG filed Critical Bosch Rexroth AG
Publication of EP1390959A2 publication Critical patent/EP1390959A2/fr
Application granted granted Critical
Publication of EP1390959B1 publication Critical patent/EP1390959B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F2007/1684—Armature position measurement using coils
    • 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
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8225—Position or extent of motion indicator
    • Y10T137/8242—Electrical

Definitions

  • the invention relates to a magnet arrangement for an electromechanical drive, in particular for a fluidic valve, according to the preamble of claim 1.
  • Such a magnet arrangement is part of a hydraulic directional control valve from the publication "Novel, Cost-Effective Actuators for Proportional Valves in Fluid Technology", magazine “O + P Oil Hydraulics and Pneumatics” 43 (1999) No. 4, pages 252 to 258.
  • a control piston In the housing of a directional valve, a control piston is axially displaceably mounted, which controls the size of the pressure medium flow flowing through the directional valve.
  • a pole tube is screwed into the housing from both sides.
  • a coil is slid over each pole tube.
  • a cylindrical armature is guided in each of the two pole tubes and exerts a force deflecting the control piston when current is applied to the coil surrounding it.
  • a displacement transducer is connected to one armature and converts the position of the armature into an electrical output signal which is a measure of the position of the armature. Since the control piston of the directional control valve is non-positively coupled to the armature, the electrical output signal of the displacement sensor is also a measure of the position of the control piston.
  • the displacement sensor has a stationary part in the form of a coil arrangement and a movable part, the core. The core is held on a core carrier, which on the of the Spool facing away from the armature is held.
  • the pole tube is closed on the side of the displacement transducer by a closure part which is provided with an axial recess. A pressure pipe is led out of the pole pipe through this recess.
  • the part of the pressure tube which projects beyond the closure part in the axial direction is concentrically enclosed by a coil arrangement which forms the fixed part of the displacement transducer.
  • the coil arrangement is arranged in its own housing. This housing is held on the pole tube by a clamping bracket which engages in an outer annular groove of the closure part. In addition, toothing is provided which prevents the housing from rotating relative to the pole tube.
  • the core of the displacement sensor moves in the area of the pressure tube enclosed by the coil arrangement.
  • the housing of the stationary part of the displacement sensor lies against the coil and secures the coil in the axial direction.
  • This type of attachment of the coil is more complex than the attachment of the coil by a nut, which engages in an external thread on the closure part, which is common in a pole tube without a displacement sensor, and increases the variety of parts.
  • the arrangement of the displacement sensor in the axial extension of the pole tube makes the directional valve provided with the displacement sensor susceptible to vibrations, which in extreme cases can lead to the displacement of the displacement sensor.
  • the invention has for its object to provide a magnet arrangement of the type mentioned, in which the Risk of damage due to vibrations is significantly reduced.
  • the magnet arrangement Since the entire displacement sensor is arranged within the closure part of the pole tube, the magnet arrangement has a very compact structure, in which the displacement sensor is also protected against mechanical damage. No separate housing is required for the stationary part of the displacement sensor. In addition, measures for fastening such a housing to the pole tube are omitted.
  • the closure parts containing the fixed part of the displacement sensor can be manufactured and tested on their own.
  • FIG. 1 shows a section through a magnet arrangement designed according to the invention
  • FIG. 2 shows the area of the closure part of the magnet arrangement shown in FIG. 1 in an enlarged view
  • FIG. 3 shows a section through a further closure part with a closure part for a magnet arrangement according to the invention
  • Figure 4 shows a section through a third closure part
  • Figure 5 shows a section through that shown in Figure 4
  • FIG. 6 shows a section through a fourth closure part for a magnet arrangement according to the invention.
  • FIG. 7 shows a section through a further closure part with a closure part, the closure part and the closure part being connected to one another via a screw drive.
  • FIG. 1 shows a section through a magnet arrangement 10 with a pole tube 11, an armature 12 guided in the pole tube 11 and a closure part 13.
  • the pole tube 11 is screwed into a housing 14 of a fluidic valve, which is only shown schematically.
  • a plunger 15 is formed on the armature 12 on the side facing the housing 14 and deflects a control piston of the valve, not shown here.
  • the magnet coil 16 is between the housing 14 and a nut 17, which is screwed into an external thread 18 of the connector. engages closing part 13, held.
  • a spring 19 is arranged between the armature 12 and the closure part 13. The spring 19 ensures a defined position of the armature 12 when the magnet coil 16 is not energized.
  • the spring 19 can be omitted if a defined position of the armature 12 when the solenoid 16 is not energized is provided in another way. If the solenoid 16 is energized, the armature 12 is deflected accordingly.
  • a core holder 21 provided with a core 20 is arranged on the side of the armature 12 facing the closure part 13.
  • the core 20 forms the movable part of a displacement sensor.
  • the displacement transducer converts the position of the armature 12 into an electrical signal, which is a measure of the position of the armature 12.
  • the closure part 13 is provided with a recess 24 which is closed by a closure part 25. Details of the connection of the end part 25 with the closure part 13 are not shown in detail. Both parts can e.g. B.
  • FIG. 2 shows a section of the magnet arrangement 10 shown in FIG. 1 in an enlarged representation.
  • the collar 30 is supported on an annular surface 31 of the closure part 13 facing the armature 12.
  • a circumferential weld seam 32 ensures a pressure-tight connection between the collar 30 of the pressure tube 29 and the closure part 13.
  • the weld seam 32 can be dispensed with if a pressure-tight connection is established in another way between the collar 30 and the closure part 13.
  • the free end of the pole tube 11 is crimped into a first annular groove 33 of the closure part 13.
  • a sealing ring 34 is arranged between the closure part 13 and the pole tube 11 in a further annular groove 35. So that the magnet coil 16 can be pushed onto the pole tube 11, the outer diameter dis of the external thread 18 is selected to be slightly smaller than the outer diameter du of the pole tube 11.
  • Two winding ends, designated 37 and 38, are shown of the winding ends of the coils 28a, 28b and 28c arranged on the carrier 36. The winding ends 37, 38 are directly with in the simplest case
  • Pins 41, 42 of the plug 26 connected. It is also possible, as shown schematically in FIG. 2, to hold a circuit board 39 on the connecting pins 41, 42 of the plug 26, which is equipped with electrical components 44, 45 of an electrical evaluation circuit. In this case the winding ends 37, 38 are connected to the input of the evaluation circuit and the output of the evaluation circuit to the connection pins 41, 42.
  • FIG. 3 shows a further closure part 50 with a closure part 51.
  • the circuit board 39 is held on the carrier 36 for the coils 28a, 28b and 28c of the stationary part of the displacement transducer.
  • the carrier 36 is pushed over a pressure tube 53, which is in turn held on the closure part 50.
  • the pressure pipe 53 is provided with a collar 54.
  • the collar 54 is supported on the annular surface 31 of the closure part 50.
  • the collar 54 is provided on the side facing the armature 12 with a recess 55 which is designed as a guide for the spring 19 shown in FIG. 1.
  • the collar 54 is connected to the closure part 50 in a pressure-tight manner by a circumferential weld seam 32.
  • the circuit board 39 is provided with soldering points 57 and 58, with which the winding ends 37 and 38 are connected.
  • An electrical cable 60 is guided in the axial direction through the end part 51. In the passage area, the cable 60 is surrounded by a grommet 61.
  • a tubular extension 62 which extends the end part 51 is formed on the end part 51 as an additional kink protection.
  • the individual lines 63, 64 of the cable 60 are connected to further soldering points 65, 66 of the printed circuit board 39.
  • the soldering points 57, 58 are connected to the soldering points 65, 66.
  • the printed circuit board 39 is shown schematically by an electronic component 44, 45 Evaluation circuit connected, the input of which is connected to the soldering points 57, 58 and the output of which is connected to the soldering points 65, 66.
  • FIG. 4 shows a third closure part 67, in which a closure part designed as a plate 68 is screwed to the closure part 67.
  • the plug 26 is formed with the connecting pins 41, 42.
  • the circuit board 39 is held mechanically on the connecting pins 41, 42.
  • the carrier 36 is held on the printed circuit board 39. From the plate 68, the connector pins
  • the circuit board 39 with the schematically illustrated electrical components 44, 45 of an evaluation circuit is arranged in a recess 70 of the plate 68.
  • the winding ends 37, 38 of the coils 28a, 28b, 28c are connected to the input of the evaluation circuit.
  • the connection pins 41, 42 of the plug 26 are electrically connected to the output of the evaluation circuit.
  • the plate 68 is held on the closure part 67 by screws distributed over the circumference, of which two screws 77, 78 are visible in FIG.
  • FIG. 5 shows a section along the line B-B shown in FIG. 4.
  • screws 77 and 78 two further screws 79 and 80 are visible in this illustration. There are also two more in this cut
  • FIG. 6 shows a further closure part 87.
  • the end part of the closure part 87 is produced, as described below, by casting with plastic.
  • the pressure pipe 53 projects into the recess 24 of the closure part 87 and is connected to it in a pressure-tight manner.
  • the carrier 36 with the coils 28a, 28b, 28c is pushed over the pressure tube 53.
  • the circuit board 39 is held on the carrier 36.
  • the connection pins 41, 42 are held mechanically on the printed circuit board 39.
  • This structure is inserted into a multi-part tool, shown only schematically, which consists of a base plate 90, two mold halves 91a, 91b and an insert 92.
  • the mold halves 91a, 91b enclose a space 94 which determines the later shape of the end part and the plug molded onto it.
  • the mold halves 91a, 91b are divided along a plane running through the central axis of the closure part 87 in such a way that the closure part provided with the end part and the plug can be removed from the mold.
  • Via a channel 95 which is only shown schematically, the space 94 and the recess 24 are filled with liquid plastic during casting. So that the plastic mass can be distributed uniformly in the mold, riser bores are provided in the tool and / or in the closure part 87 in the usual way. They are not shown in FIG. 6.
  • FIG. 7 shows a closure part 100, to which a closure part 101 is connected via a screw connection.
  • the pressure tube 29 protrudes into the cylindrical recess 24 of the closure part 100. Its collar 30 is supported on the end face of the closure part 100 facing the armature of the magnet arrangement.
  • the recess 24 of the closure part 100 is provided with an internal thread 104 and the closure part 101 with a corresponding external thread 105.
  • the internal thread 104 of the closure part 100 and the external thread 105 of the closure part 101 form a screw drive which rotates the closure part 101 relative to the closure part 100 in reshaped an axial movement between the two parts.
  • the circuit board 39 is held on the end part 101.
  • the carrier 36 with the coils 28a, 28b and 28c, which form the fixed part of the displacement sensor, are held on the printed circuit board 39.
  • the region of the end part 101, in which the carrier 36 with the coils 28a to 28c is located, is arranged within the recess 24 of the closure part 100.
  • the carrier 36 surrounds the pressure tube 29 concentrically.
  • a lock nut 108 which is provided with an internal thread 107, is screwed onto the external thread 105 of the end part 101 and prevents the end part 101 from being inadvertently rotated during operation of the displacement sensor. prevented over the closure member 100.
  • the lock nut 108 is screwed against the closure part 100, its internal thread 107 being supported on the external thread 105 of the end part 101 and which with the
  • the core In order to adjust the displacement transducer, the core is held in a position that is stationary with respect to the valve housing and the end part 101 is rotated relative to the closure part 100 and thus with respect to the valve housing until the electrical output signal present at the connecting pins 41, 42 has assumed a desired value , As described above, this position is secured against unintentional rotation by tightening the lock nut 108.
  • switching signals can be generated from the continuous output signal of the displacement transducer if necessary, which signal the reaching of the control piston of a control valve determined by the threshold values.
  • the combination of the electrical signals can be both outside the closure part and inside the closure part, for. B. by the arrangement of additional electronic components on the circuit board 39.
  • the switching signals are available in addition to the continuous output signal of the displacement transducer and can be processed independently in control and / or monitoring devices.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Actuator (AREA)

Abstract

L'invention concerne un ensemble magnétique pour entraînement électromécanique, comprenant un induit cylindrique guidé dans un tube polaire, la position de l'induit étant convertie en signal électrique. A cet effet, un capteur de déplacement composé d'une partie fixe et d'une partie mobile est relié à l'induit. Une face de l'induit est façonnée de manière à transmettre le mouvement de l'induit, l'autre face étant reliée à la partie mobile du capteur de déplacement. Le tube polaire est pourvu, côté capteur de déplacement, d'une pièce de fermeture. Un évidement axial disposé dans cette pièce de fermeture permet le passage d'un tube de pression vers l'extérieur. Dans ce tube de pression, qui est entouré d'un élément fixe du capteur de déplacement, se déplace la partie mobile du capteur de déplacement. Afin d'éviter un endommagement du capteur de déplacement par des vibrations, la partie fixe du capteur de déplacement est logée dans un évidement de la pièce de fermeture. Des ensembles magnétiques de ce type sont utilisés notamment pour le retour électrique en position sur des soupapes actionnées par un fluide.
EP02740320A 2001-05-17 2002-05-08 Ensemble magnetique Expired - Lifetime EP1390959B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10124007 2001-05-17
DE10124007 2001-05-17
PCT/DE2002/001652 WO2002093592A2 (fr) 2001-05-17 2002-05-08 Ensemble magnetique

Publications (2)

Publication Number Publication Date
EP1390959A2 true EP1390959A2 (fr) 2004-02-25
EP1390959B1 EP1390959B1 (fr) 2011-12-14

Family

ID=7685120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02740320A Expired - Lifetime EP1390959B1 (fr) 2001-05-17 2002-05-08 Ensemble magnetique

Country Status (4)

Country Link
US (1) US7093613B2 (fr)
EP (1) EP1390959B1 (fr)
DE (1) DE10220405A1 (fr)
WO (1) WO2002093592A2 (fr)

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Publication number Priority date Publication date Assignee Title
US7537022B2 (en) * 2005-11-09 2009-05-26 Honeywell International Inc. Valve actuator assembly
GB0707376D0 (en) * 2007-04-17 2007-05-23 Penny & Giles Controls Ltd Inductive sensors
JP5453442B2 (ja) 2008-10-31 2014-03-26 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 電磁石
DE102009041159B4 (de) 2009-09-14 2022-12-08 Magnet-Schultz Gmbh & Co. Kg Wegsensoreinheit und Anordnung mit der Wegsensoreinheit
DE102010010187B4 (de) * 2010-03-03 2012-07-26 Pierburg Gmbh Elektromagnetventil
DE102011006071A1 (de) * 2011-03-24 2012-09-27 Ina - Drives & Mechatronics Gmbh & Co. Ohg Antriebseinrichtung für ein Ventil, Ventil zur Steuerung eines Gas- und/oder Flüssigkeitsstroms
DE202014102940U1 (de) * 2014-06-27 2014-07-23 Bürkert Werke GmbH Ventil mit einem Stößel und einem Sensor
DE102017121094A1 (de) * 2017-09-12 2019-03-14 Bürkert Werke GmbH & Co. KG Ventilsteuerkopf
DE102019104192A1 (de) * 2019-02-19 2020-08-20 Eto Magnetic Gmbh Magnetaktorvorrichtung, magnetisch betätigbares Ventil, Verfahren mit der Magnetaktorvorrichtung und Verfahren zur Herstellung der Magnetaktorvorrichtung
CN112945426B (zh) * 2021-01-29 2022-02-01 西南石油大学 振弦传感器及应力位移测试方法
DE102022117083A1 (de) 2022-07-08 2024-01-11 Svm Schultz Verwaltungs-Gmbh & Co. Kg Hubbegrenzung für einen Elektromagneten, Elektromagnet und Verfahren

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Also Published As

Publication number Publication date
WO2002093592A3 (fr) 2003-02-20
US20040129318A1 (en) 2004-07-08
US7093613B2 (en) 2006-08-22
DE10220405A1 (de) 2002-11-21
EP1390959B1 (fr) 2011-12-14
WO2002093592A2 (fr) 2002-11-21

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