EP0464370A1 - Actuator unit - Google Patents

Actuator unit Download PDF

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Publication number
EP0464370A1
EP0464370A1 EP19910108756 EP91108756A EP0464370A1 EP 0464370 A1 EP0464370 A1 EP 0464370A1 EP 19910108756 EP19910108756 EP 19910108756 EP 91108756 A EP91108756 A EP 91108756A EP 0464370 A1 EP0464370 A1 EP 0464370A1
Authority
EP
European Patent Office
Prior art keywords
bore
pressure tube
adjusting sleeve
housing
magnetic resistance
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
EP19910108756
Other languages
German (de)
French (fr)
Other versions
EP0464370B1 (en
Inventor
Roland Schempp
Jörg Dipl.-Ing. Siebert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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 EP0464370A1 publication Critical patent/EP0464370A1/en
Application granted granted Critical
Publication of EP0464370B1 publication Critical patent/EP0464370B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01F7/081—Magnetic constructions
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material

Definitions

  • the invention relates to an actuating device according to the type of the main claim.
  • a control device known from DE-OS 33 00 437 has the disadvantage that, in particular, proportional magnets emit different forces on the armature or plunger due to production variations and permeability differences under the same electrical conditions. With proportional valves, this leads to different pressures or flow rates.
  • the electronic control must be individually adapted to the associated valve, and if one of the two components, the valve control fails, the electronics must be readjusted or a complete exchange carried out in order to be able to maintain the specified setpoints.
  • the actuating device according to the invention with the characterizing features of the main claim has the advantage that the magnetic force can be varied by the described formation of the iron circuit.
  • By changing the magnetic resistance at constant magnetic flux, which is proportional to the coil current creates a unified assignment of magnetic force to the coil current. Due to the adjustability of the magnetic resistance, it can be adapted to the required setpoints without the electronic control having to be replaced or changed. If one of the two components - valve or control - fails, there is no need to completely replace or readjust the control electronics.
  • a magnet coil 16 is arranged in the bore 14, the outer diameter of which corresponds to the bore 14 and the inner diameter of which is smaller than the diameter of the bore 13.
  • the coil 16 is shorter than the bore 14.
  • the housing 11 is closed on the side opposite the end plate 10 by a magnetically conductive disk 18 which has an aligned bore 19 which corresponds to the inside diameter of the coil 16.
  • the disc 18 is fitted into the housing so that the coil 16 is fixed in its position.
  • the part of the pressure tube 20 protruding from the housing 11 has an external thread 21 for connection to a valve, not shown.
  • the pressure tube 20 is composed of three tube parts 23, 24, 25, of which the tube parts 23 and 25 are made of magnetic material and the tube part 24 is made of non-magnetic material.
  • An axial bore 27 is arranged in the pressure tube part 23 starting from the valve side and merges into an aligned bore 28 of larger diameter in the area of the disk 18.
  • the bore 28 continues in the tubular part 24 and merges into a continuous bore 29 of smaller diameter in the tubular part 25.
  • the end of the bore 29 facing the end plate 10 is designed as a threaded bore 29A.
  • a cylindrical armature 30 is guided with play, which extends via a plunger 32 projecting through the bore 27, for. B. actuated the valve spool of a directional valve.
  • the armature 30 has an axial blind bore 31 in its side facing away from the valve.
  • one end of a compression spring 33 is supported, the opposite end of which rests on an adjusting screw 35 located in the bore 29, 29A.
  • the adjusting screw 35 closes the bore 29 and thus the pressure pipe 20 in a pressure-tight manner with a sealing ring 37 located in an annular groove 36.
  • an adjusting sleeve 39 is arranged, the outer diameter of which is designed as a corresponding thread 39A.
  • the inner diameter of the sleeve 39 corresponds to the coil inner diameter or the pressure tube diameter.
  • the overlap "Ü" between the sleeve 39 and the pressure tube 20 and thus the magnetic resistance opposing the magnetic flux can be changed.
  • the degree of coverage determines the level of the magnetic contact resistance and thus the total resistance. If the coverage becomes zero or negative, strong stray fluxes occur and the magnetic force on the armature drops considerably.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention relates to an electromagnetic actuator unit which has an adjusting sleeve (39) which can be displaced on the pressure tube (20). Said adjusting sleeve (39) allows the magnetic resistance in the iron circuit of the magnet to be changed. In this way, the magnetic force can be calibrated with a constant coil current. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Stelleinrichtung nach der Gattung des Hauptanspruchs. Eine derartige, nach der DE-OS 33 00 437 bekannte Stelleinrichtung hat den Nachteil, daß insbesondere Proportionalmagnete aufgrund von Fertigungsstreuungen und Permeabilitätsunterschieden bei gleichen elektrischen Bedingungen unterschiedliche Kräfte am Anker bzw. Stößel abgeben. Dies führt bei Proportionalventilen zu unterschiedlichen Drücken oder Durchflußmengen. Die elektronische Ansteuerung muß einzeln an das zugehörige Ventil angepaßt werden, und bei Versagen einer der beiden Komponenten Ventil, Ansteuerung muß ein Neuabgleich der Elektronik bzw. ein Komplettaustausch erfolgen, um vorgegebene Sollwerte einhalten zu können.The invention relates to an actuating device according to the type of the main claim. Such a control device known from DE-OS 33 00 437 has the disadvantage that, in particular, proportional magnets emit different forces on the armature or plunger due to production variations and permeability differences under the same electrical conditions. With proportional valves, this leads to different pressures or flow rates. The electronic control must be individually adapted to the associated valve, and if one of the two components, the valve control fails, the electronics must be readjusted or a complete exchange carried out in order to be able to maintain the specified setpoints.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Stelleinrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß durch die beschriebene Ausbildung des Eisenkreises die Magnetkraft variiert werden kann. Durch Veränderung des magnetischen Widerstandes bei gleichbleibender magnetischer Durchflutung, die proportional zum Spulenstrom ist, wird eine vereinheitlichte Zuordnung von Magnetkraft zum Spulenstrom geschaffen. Durch die Einstellbarkeit des magnetischen Widerstandes kann eine Anpassung an geforderte Sollwerte erfolgen, ohne daß die elektronische Ansteuerung ersetzt oder verändert werden muß. Bei Ausfall einer der beiden Komponenten - Ventil oder Ansteuerung - muß kein Komplettaustausch oder Neuabgleich der Ansteuerelektronik erfolgen.The actuating device according to the invention with the characterizing features of the main claim has the advantage that the magnetic force can be varied by the described formation of the iron circuit. By changing the magnetic resistance at constant magnetic flux, which is proportional to the coil current, creates a unified assignment of magnetic force to the coil current. Due to the adjustability of the magnetic resistance, it can be adapted to the required setpoints without the electronic control having to be replaced or changed. If one of the two components - valve or control - fails, there is no need to completely replace or readjust the control electronics.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der nachstehenden Beschreibung und Zeichnung näher erläutert. Letztere zeigt einen Längsschnitt durch einen Proportionalmagneten.An embodiment of the invention is explained in more detail in the description and drawing below. The latter shows a longitudinal section through a proportional magnet.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein mit einer Abschlußplatte 10 einseitig verschlossenes, etwa becherförmiges, magnetisch leitendes Gehäuse 11 eines Proportionalmagneten 12 weist eine von der Abschlußplatte 10 ausgehende mittige Gewindebohrung 13 auf, die in eine achsgleich verlaufende Bohrung 14 größeren Durchmessers übergeht. In der Bohrung 14 ist eine Magnetspule 16 angeordnet, deren Außendurchmesser der Bohrung 14 entspricht, und deren Innendurchmesser kleiner als der Durchmesser der Bohrung 13 ist. Die Spule 16 ist kürzer als die Bohrung 14. Das Gehäuse 11 ist durch eine magnetisch leitende Scheibe 18, die eine dem Innendurchmesser der Spule 16 entsprechende, fluchtende Bohrung 19 aufweist, an der der Abschlußplatte 10 gegenüberliegenden Seite abgeschlossen. Die Scheibe 18 ist so in das Gehäuse eingepaßt, daß die Spule 16 in ihrer Lage fixiert ist.An approximately cup-shaped, magnetically conductive housing 11 of a proportional magnet 12, which is closed on one side with an end plate 10, has a central threaded bore 13 extending from the end plate 10, which merges into a bore 14 of larger diameter which is coaxial. A magnet coil 16 is arranged in the bore 14, the outer diameter of which corresponds to the bore 14 and the inner diameter of which is smaller than the diameter of the bore 13. The coil 16 is shorter than the bore 14. The housing 11 is closed on the side opposite the end plate 10 by a magnetically conductive disk 18 which has an aligned bore 19 which corresponds to the inside diameter of the coil 16. The disc 18 is fitted into the housing so that the coil 16 is fixed in its position.

Durch die Bohrung 19 der Scheibe 18 ragt ein Druckrohr 20 durch die Spule 16 in die Bohrung 13, ohne die Abschlußplatte 10 zu erreichen.Through the bore 19 of the disc 18, a pressure tube 20 projects through the coil 16 into the bore 13 without reaching the end plate 10.

Der aus dem Gehäuse 11 ragende Teil des Druckrohres 20 weist ein Außengewinde 21 zum Anschluß an ein nicht dargestelltes Ventil auf. Das Druckrohr 20 setzt sich aus drei Rohrteilen 23, 24, 25 zusammen, von denen die Rohrteile 23 und 25 aus magnetischem Werkstoff und das Rohrteil 24 aus unmagnetischem Werkstoff bestehen.The part of the pressure tube 20 protruding from the housing 11 has an external thread 21 for connection to a valve, not shown. The pressure tube 20 is composed of three tube parts 23, 24, 25, of which the tube parts 23 and 25 are made of magnetic material and the tube part 24 is made of non-magnetic material.

In dem Druckrohrteil 23 ist von der Ventilseite ausgehend eine axiale Bohrung 27 angeordnet, die im Bereich der Scheibe 18 in eine fluchtende Bohrung 28 größeren Durchmessers übergeht. Die Bohrung 28 setzt sich im Rohrteil 24 fort und geht im Rohrteil 25 in eine durchgehende Bohrung 29 geringeren Durchmessers über. Das der Abschlußplatte 10 zugewandte Ende der Bohrung 29 ist als Gewindebohrung 29A ausgebildet.An axial bore 27 is arranged in the pressure tube part 23 starting from the valve side and merges into an aligned bore 28 of larger diameter in the area of the disk 18. The bore 28 continues in the tubular part 24 and merges into a continuous bore 29 of smaller diameter in the tubular part 25. The end of the bore 29 facing the end plate 10 is designed as a threaded bore 29A.

In der Bohrung 28 ist mit Spiel ein zylindrischer Anker 30 geführt, der über einen durch die Bohrung 27 ragenden Stößel 32, z. B. den Ventilschieber eines Wegeventils betätigt. In seiner ventilabgewandten Seite weist der Anker 30 eine axiale Sackbohrung 31 auf. In dieser stützt sich das eine Ende einer Druckfeder 33 ab, die mit ihrem entgegengesetzten Ende an einer in der Bohrung 29, 29A befindlichen Einstellschraube 35 anliegt. Die Einstellschraube 35 schließt mit einem in einer Ringnut 36 befindlichen Dichtring 37 die Bohrung 29 und damit das Druckrohr 20 druckdicht ab.In the bore 28, a cylindrical armature 30 is guided with play, which extends via a plunger 32 projecting through the bore 27, for. B. actuated the valve spool of a directional valve. The armature 30 has an axial blind bore 31 in its side facing away from the valve. In this, one end of a compression spring 33 is supported, the opposite end of which rests on an adjusting screw 35 located in the bore 29, 29A. The adjusting screw 35 closes the bore 29 and thus the pressure pipe 20 in a pressure-tight manner with a sealing ring 37 located in an annular groove 36.

In einem aus Druckrohr 20 und Gehäuse 11 im Bereich der Gewindebohrung 13 gebildeten Ringraum 38 ist eine Einstellhülse 39 angeordnet, deren Außendurchmesser als entsprechendes Gewinde 39A ausgebildet ist. Der Innendurchmesser der Hülse 39 entspricht dem Spuleninnendurchmesser bzw. dem Druckrohrdurchmesser. An ihrer der Abschlußplatte 10 zugewandten Seite weist sie einen Boden 40 auf, der eine mittige, sechskantige Öffnung 41 hat. Durch diese Öffnung 41 hindurch kann einerseits die Einstellschraube 35 betätigt werden und andererseits die Einstellhülse 39 selbst in der Gewindebohrung 13 durch Drehung verschoben werden.In an annular space 38 formed from pressure pipe 20 and housing 11 in the area of threaded bore 13, an adjusting sleeve 39 is arranged, the outer diameter of which is designed as a corresponding thread 39A. The inner diameter of the sleeve 39 corresponds to the coil inner diameter or the pressure tube diameter. On its side facing the end plate 10, it has a base 40 which has a central, hexagonal opening 41. Through this opening 41, on the one hand, the adjusting screw 35 can be actuated and, on the other hand, the adjusting sleeve 39 itself can be moved in the threaded bore 13 by rotation.

Durch die Verschiebbarkeit der Einstellhülse 39 auf dem Druckrohr 20 kann die Überdeckung "Ü" zwischen Hülse 39 und Druckrohr 20 und somit der dem magnetischen Fluß entgegenstehende magnetische Widerstand geändert werden. Das Maß der Überdeckung bestimmt die Höhe des magnetischen Übergangswiderstandes und damit den Gesamtwiderstand. Wird die Überdeckung Null oder negativ, entstehen starke Streuflüsse, und die Magnetkraft am Anker sinkt erheblich.Due to the displaceability of the adjusting sleeve 39 on the pressure tube 20, the overlap "Ü" between the sleeve 39 and the pressure tube 20 and thus the magnetic resistance opposing the magnetic flux can be changed. The degree of coverage determines the level of the magnetic contact resistance and thus the total resistance. If the coverage becomes zero or negative, strong stray fluxes occur and the magnetic force on the armature drops considerably.

Claims (4)

Elektromagnetische Stelleinrichtung, in deren Gehäuse (11) ein einen Anker (30) eines Elektromagneten aufnehmendes Druckrohr (20) angeordnet ist, der beispielsweise den Steuerschieber eines Wegeventils betätigt` dadurch gekennzeichnet, daß im Eisenkreis des Magneten ein verstellbarer magnetischer Widerstand (39) in Reihe geschaltet ist.Electromagnetic actuating device, in the housing (11) of which an armature (30) of an electromagnet receiving pressure tube (20) is arranged, which actuates, for example, the control slide of a directional control valve`, characterized in that an adjustable magnetic resistance (39) in series in the iron circuit of the magnet is switched. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der verstellbare magnetische Widerstand durch eine über dem freien Ende des Druckrohres (20) verschiebbare Einstellhülse (39) gebildet ist.Device according to claim 1, characterized in that the adjustable magnetic resistance is formed by an adjusting sleeve (39) which can be displaced over the free end of the pressure tube (20). Einrichtung nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, daß die Einstellhülse (39) in einem aus Gehäuse (11) und Druckrohr (20) gebildeten Ringraum (38) angeordnet ist.Device according to claim 1 and / or 2, characterized in that the adjusting sleeve (39) is arranged in an annular space (38) formed from the housing (11) and pressure tube (20). Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Einstellhülse (39) einen mit einer Einstellöffnung (41) versehenen Boden (40) aufweist.Device according to one of claims 1 to 3, characterized in that the adjusting sleeve (39) has a bottom (40) provided with an adjusting opening (41).
EP91108756A 1990-07-06 1991-05-29 Actuator unit Expired - Lifetime EP0464370B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021624 1990-07-06
DE4021624A DE4021624A1 (en) 1990-07-06 1990-07-06 ACTUATOR

Publications (2)

Publication Number Publication Date
EP0464370A1 true EP0464370A1 (en) 1992-01-08
EP0464370B1 EP0464370B1 (en) 1994-08-10

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ID=6409822

Family Applications (1)

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EP91108756A Expired - Lifetime EP0464370B1 (en) 1990-07-06 1991-05-29 Actuator unit

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EP (1) EP0464370B1 (en)
DE (2) DE4021624A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638740B1 (en) * 1993-08-05 1998-01-07 Dana Corporation Magnetic flux breaker for a solenoid in a wrap spring clutch
EP0825369A2 (en) * 1996-08-13 1998-02-25 Honeywell B.V. Adjustment device for the impedance of the magnetic path of an electromagnetic valve
WO2002052586A1 (en) * 2000-12-22 2002-07-04 Robert Bosch Gmbh Electromagnet
US6556113B2 (en) 2001-01-19 2003-04-29 Robert Bosch Gmbh Electromagnetic adjusting device
FR2853020A1 (en) * 2003-03-28 2004-10-01 Sanden Corp REGULATION VALVE DEVICE FOR OSCILLATING PLATE COMPRESSOR WITH VARIABLE CAPACITY
CN101984495A (en) * 2010-08-31 2011-03-09 浙江大学 Stepped disc type ratio electromagnet
CN101984496A (en) * 2010-08-31 2011-03-09 浙江大学 K-type disc proportional electromagnet
EP2325850A1 (en) * 2008-09-11 2011-05-25 Kawasaki Jukogyo Kabushiki Kaisha Oil immersed solenoid
US8138871B2 (en) * 2006-01-17 2012-03-20 Robert Bosch Gmbh Pole tube
US8505874B2 (en) 2008-09-11 2013-08-13 Kawasaki Jukogyo Kabushiki Kaisha Adjusting screw structure of oil immersed solenoid and oil immersed solenoid including the same
EP2911164A1 (en) * 2014-02-22 2015-08-26 HYDAC Electronic GmbH Electromagnetic actuation device
WO2017211787A1 (en) * 2016-06-08 2017-12-14 Festo Ag & Co. Kg Electromagnetic actuating device having an armature-guiding assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300437A1 (en) * 1982-11-10 1984-05-10 Robert Bosch Gmbh, 7000 Stuttgart Actuating device
DE3437106A1 (en) * 1983-10-14 1985-05-02 Equipements Automobiles Marchal S.A., Issy-les-Moulineaux ELECTROMAGNETIC ACTUATOR
DE3829676A1 (en) * 1988-09-01 1990-03-15 Olympia Aeg SUBMERSIBLE MAGNET, AND THE USE THEREOF AS A PRINTING HAMMER IN A PRINTING HAMMER DEVICE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300437A1 (en) * 1982-11-10 1984-05-10 Robert Bosch Gmbh, 7000 Stuttgart Actuating device
DE3437106A1 (en) * 1983-10-14 1985-05-02 Equipements Automobiles Marchal S.A., Issy-les-Moulineaux ELECTROMAGNETIC ACTUATOR
DE3829676A1 (en) * 1988-09-01 1990-03-15 Olympia Aeg SUBMERSIBLE MAGNET, AND THE USE THEREOF AS A PRINTING HAMMER IN A PRINTING HAMMER DEVICE

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638740B1 (en) * 1993-08-05 1998-01-07 Dana Corporation Magnetic flux breaker for a solenoid in a wrap spring clutch
EP0825369A2 (en) * 1996-08-13 1998-02-25 Honeywell B.V. Adjustment device for the impedance of the magnetic path of an electromagnetic valve
EP0825369A3 (en) * 1996-08-13 1998-03-04 Honeywell B.V. Adjustment device for the impedance of the magnetic path of an electromagnetic valve
WO2002052586A1 (en) * 2000-12-22 2002-07-04 Robert Bosch Gmbh Electromagnet
US6724287B2 (en) 2000-12-22 2004-04-20 Robert Bosch Gmbh Electromagnet
US6556113B2 (en) 2001-01-19 2003-04-29 Robert Bosch Gmbh Electromagnetic adjusting device
FR2853020A1 (en) * 2003-03-28 2004-10-01 Sanden Corp REGULATION VALVE DEVICE FOR OSCILLATING PLATE COMPRESSOR WITH VARIABLE CAPACITY
US7273356B2 (en) 2003-03-28 2007-09-25 Sanden Corporation Control valve device for variable capacity type swash plate compressor
US8138871B2 (en) * 2006-01-17 2012-03-20 Robert Bosch Gmbh Pole tube
EP2325850A1 (en) * 2008-09-11 2011-05-25 Kawasaki Jukogyo Kabushiki Kaisha Oil immersed solenoid
EP2325850A4 (en) * 2008-09-11 2011-11-09 Kawasaki Heavy Ind Ltd Oil immersed solenoid
US8350651B2 (en) 2008-09-11 2013-01-08 Kawasaki Jukogyo Kabushiki Kaisha Oil immersed solenoid
US8505874B2 (en) 2008-09-11 2013-08-13 Kawasaki Jukogyo Kabushiki Kaisha Adjusting screw structure of oil immersed solenoid and oil immersed solenoid including the same
CN101984496A (en) * 2010-08-31 2011-03-09 浙江大学 K-type disc proportional electromagnet
CN101984495A (en) * 2010-08-31 2011-03-09 浙江大学 Stepped disc type ratio electromagnet
CN101984496B (en) * 2010-08-31 2012-04-25 浙江大学 K-type disc proportional electromagnet
CN101984495B (en) * 2010-08-31 2012-07-25 浙江大学 Stepped disc type ratio electromagnet
EP2911164A1 (en) * 2014-02-22 2015-08-26 HYDAC Electronic GmbH Electromagnetic actuation device
WO2017211787A1 (en) * 2016-06-08 2017-12-14 Festo Ag & Co. Kg Electromagnetic actuating device having an armature-guiding assembly

Also Published As

Publication number Publication date
DE59102476D1 (en) 1994-09-15
DE4021624A1 (en) 1992-01-09
EP0464370B1 (en) 1994-08-10

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