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EP0498173A1 - Servo-soupape actionnée par d'incorporés et commandée par une soupape magnétique bistable pour moyens liquides et gazeux - Google Patents

Servo-soupape actionnée par d'incorporés et commandée par une soupape magnétique bistable pour moyens liquides et gazeux Download PDF

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Publication number
EP0498173A1
EP0498173A1 EP92100550A EP92100550A EP0498173A1 EP 0498173 A1 EP0498173 A1 EP 0498173A1 EP 92100550 A EP92100550 A EP 92100550A EP 92100550 A EP92100550 A EP 92100550A EP 0498173 A1 EP0498173 A1 EP 0498173A1
Authority
EP
European Patent Office
Prior art keywords
magnet
valve
servo valve
magnet armature
armature
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
EP92100550A
Other languages
German (de)
English (en)
Other versions
EP0498173B1 (fr
Inventor
Hermann Moldenhauer
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.)
A&K Mueller GmbH and Co KG
Original Assignee
A&K Mueller GmbH and Co KG
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 A&K Mueller GmbH and Co KG filed Critical A&K Mueller GmbH and Co KG
Publication of EP0498173A1 publication Critical patent/EP0498173A1/fr
Application granted granted Critical
Publication of EP0498173B1 publication Critical patent/EP0498173B1/fr
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
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1872—Bistable or bidirectional current devices
    • 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
    • H01F2007/1669—Armatures actuated by current pulse, e.g. bistable actuators

Definitions

  • the invention relates to a servo valve for liquid and gaseous media, which is actuated by the medium and controlled by a bistable solenoid valve, with the features from the preamble of patent claim 1.
  • bistable solenoid valves for servo control is known in many different designs and has the advantage that the lowest possible energy consumption can be used and, for example, direct control from the link level is possible without signal conditioning and the magnetic coil and the magnet armature do not heat up. In most cases it becomes bistable Operation of the solenoid valve achieved with the help of a permanent magnet and a spring matched to this. Solenoid valves are also known which are constructed without a permanent magnet. The bistable mode of operation of these valves is achieved through the use of relatively hard magnetic materials in the magnet system.
  • the coercive field strength of these hard magnetic materials is brought to a value O for a short period of time, depending on the polarity of the magnetic coil, so that the magnet armature of the solenoid valve is either attracted to the pole face or not attracted under the action of a return spring.
  • a valve In the hydraulic field, with the elimination of the permanent magnet, such a valve can no longer be regarded as a magnetic trap for ferritic floating particles in the medium.
  • the invention has for its object to provide a servo valve of the type specified in the preamble of claim 1 so that the electrical control power can be reduced even further with an extremely simple construction, so that a control device fed from a battery can be used to control the bistable solenoid valve .
  • the basic idea of the invention is to use soft magnetic materials in the magnet system of the bistable solenoid valve, for whose magnetic polarity reversal, because of the low coercive field strength, control pulses with very low electrical power are sufficient.
  • the magnet armature cannot withstand the force of a return spring Magnet pole are held.
  • a return spring was therefore dispensed with at all, and the weight of the magnet armature was matched to the holding force in such a way that when the coercive field strength is brought to 0 by the closing pulse, it drops due to its own weight.
  • the invention also includes the operation of the servo valve according to the invention with opening and closing pulses for the bistable solenoid valve, or an electrical control device for generating the opening and closing pulses to which the solenoid valve is connected.
  • the opening and closing pulses for switching the servo valve on and off must be different in a predetermined ratio so that when the magnet armature is detached due to the closing pulse, the magnet system does not re-magnetize, which would result in the magnet armature being tightened again. It has proven to be advantageous if the opening pulses to the closing pulses are designed in a power ratio of essentially 3: 1 to 5: 1, ie only 1/3 to 1/5 of the electrical power required to attract the Magnetic armature must be used. This type of operation is also particularly valuable from a safety point of view if the additional requirement is raised that the valve must still be able to close, even if a power failure occurs during the opening phase.
  • the control device for controlling the solenoid valve is designed such that when the opening pulse is emitted, the electrical energy required to generate the closing pulse is simultaneously taken from the power source and stored.
  • This has the advantage that a closing impulse can still be given if a power failure occurs or the supply battery fails.
  • This coupling between the opening and closing impulse also prevents the solenoid valve from being switched on when the battery is discharged, which could possibly no longer apply the closing impulse. No current is drawn from the battery during the opening phase of the servo valve, not even for the switch-off pulse.
  • the servo valve according to the invention can operate with an extremely low energy requirement for a control cycle of, for example, 10 mWs at 6 bar medium pressure. This energy requirement is approximately 70% below the energy requirement of the known bistable solenoid valve described in DE-OS 38 22 830.
  • the valve shown in Fig. 1 has a valve housing 1 with an inlet connection Z, in which a strainer 13 is arranged, and an outlet connection A.
  • a differential piston 2 is slidably arranged in the axial direction, which at its edges via a rolling membrane 2.2 is connected to the valve housing 1.
  • the differential piston 2 carries on one side a valve disk 2.1, which is opposite a valve seat 3.
  • the inlet connection Z ie the pressure connection, opens into an annular pressure chamber 4 which is connected to the outlet connection A via the valve seat 3.
  • a control chamber 5 is arranged, which is delimited from the pressure chamber 4 by the differential piston 2 and the rolling diaphragm 2.2.
  • the control chamber 5 is connected to the pressure chamber 4 via a control bore 10 arranged eccentrically in the differential piston 2.
  • a return spring 12 for the movement of the differential piston 2 and a spring element 11, which is guided at one end through the control bore 10 into the pressure chamber 4. This spring element 11 is used in a manner known per se to keep the control bore 10 free of foreign bodies.
  • the control room 5 is connected to the drain connection A via a drain channel, which is composed of the sections 6.1, 6.2 and 6.3.
  • the section 6.1 connects the pressure chamber 5 with the solenoid valve chamber 7, which in turn via the solenoid valve seat 9 and Sections 6.2 and 6.3 of the relief channel is connected to the drain connection A.
  • the arranged in the housing 1 solenoid valve chamber 7 with the solenoid valve seat 9 belongs to a bistable solenoid valve, which is designated M in FIG. 1 and which is arranged on the valve housing 1 essentially coaxially with the differential piston 2.
  • the solenoid valve M has a solenoid 16, through which a guide tube 15 is guided, in which a magnet armature 14 is slidably guided, which carries at its end facing the valve housing 1 a magnet armature seal 8 which is opposite the solenoid valve seat 9.
  • the other end of the Magnatanker 14 is opposite a head piece 17, which is fixedly arranged within the guide tube 15.
  • the magnet coil 16 is surrounded by a magnet yoke 18, one leg 18.1, which comprises the lower end face of the magnet coil 16 in FIG. 1, is passed between the magnet coil 16 and the housing 1, while the other leg 18.2 comprises the magnet coil 16 on its upper side.
  • Magnetic armature 14, head piece 17 and magnetic yoke 18 are made of a soft magnetic material with a coercive field strength of less than 400 A / m, whereby the coercive field strength of the magnetic yoke 18 can be somewhat higher than the coercive field strength of the magnetic armature 14 and the head piece 17.
  • the size of the magnet armature 14 is kept very short compared to conventional solenoid valves, so that the working air gap between the magnet armature 14 and the head piece 17, which is otherwise arranged approximately at the level of the transverse center plane of the magnet coil, in this case very clearly below the transverse center plane Q1 of the magnet coil 16 lies.
  • the arrangement is also such that the transverse center plane Q2 of the magnet armature 14 is approximately at the level of the lower leg 18.1 of the magnet yoke 18.
  • the weight of the magnet armature 14 is matched to the holding force of the magnet system in such a way that, after supplying an opening pulse which magnetizes the magnet coil 16, the very light magnet armature 14 is held on the head piece 17 by the coercive field strength via the coil feed 16.1.
  • the solenoid valve M is open, in which the armature seal 8 lifts off the solenoid valve seat 9.
  • the operation of the servo valve which is known per se, is such that, when the relief channel 6.1-6.2-6.3 is open, pressure equalization occurs between the control chamber 5 and the drain connection A and the differential piston 2 lifts off the valve seat 3 due to the pressure in the pressure chamber 4, so that the valve opens.
  • control pulses which cause the magnetization of the magnet system to be reversed can be generated in various ways.
  • a control device (not shown) for generating electrical pulses can generate pulses of the same amplitude and polarity, and the magnetic coil 16 has two windings with opposite winding directions and different electrical resistance, so that when the control pulses are emitted, the opening pulse and the closing pulse each have different pulses Currents flow that produce different magnetizations of opposite polarity.
  • FIG. 2 shows schematically as current pulses I, plotted against time t, an opening pulse I1 and a closing pulse -I2, which have a power ratio of 3: 1 to 5: 1.
  • This power ratio ensures that the closing pulse -I2 does not lead to magnetization of the head piece 17 again in such a way that the magnet armature 14 picks up again and the valve opens again.
  • a hatched area I is indicated in FIG. 2 for the opening pulse, which indicates that the opening pulse has a portion which serves to charge a storage capacitor C1 arranged in the control circuit described below, which ensures the generation of a closing pulse even if the supply voltage fails.
  • FIG. 3 schematically shows a control device STV for generating the opening and closing pulses, which is connected via a switch S to a current source V, for example a battery.
  • the switch S can also be designed as proximity electronics and, for example, on the basis of infrared radiation, ultrasound, radar and the like.
  • the current source supplies the supply voltage for a first control device ST1 for voltage monitoring and a second control device ST2 for pulse generation via supply inputs VE1 +, VE1- or VE2 +, VE2-.
  • a bridge circuit is connected to the current source V1 via the switch S, which is designated overall by B and contains the four controllable switching elements S1, S2, S3 and S4, the control inputs of which are each connected to the signal outputs SA1, SA2, SA3 and SA4 of the second control circuit ST2 are connected for pulse generation.
  • the switching elements S1 to S4 are shown in FIG. 3 as switches. Of course, electronic switching elements, ie switching transistors or IC circuits, can be used at this point.
  • the magnetic coil 16 with its two input terminals 16.1 and 16.2 is located in the bridge branch of the bridge circuit B.
  • a voltage limiter circuit Z for limiting the magnitude of the closing pulse is connected in parallel with the magnet coil 16. Parallel to the entire electronic bridge circuit B there is a second storage capacitor C1 for generating the closing pulse in the event of a failure of the supply voltage, a reverse discharge of the capacitor C1 being prevented via a diode D2.
  • the circuit works as follows: When the switch S is closed, a control signal is emitted by the second control device ST2 via the signal outputs SA1 and SA2, which briefly closes the switching elements S1 and S2, so that the input terminal 16.1 of the magnetic coil 16 briefly on the negative pole and the input terminal 16.2 briefly on the positive pole of the voltage source and a corresponding current pulse flows through the magnet coil 16. During the further closed state of the switch S, all the switching elements S1 to S4 are opened again, so that no further current flows through the magnet coil 16. When the switch S is opened, the second control device ST2 now generates control signals at the signal outputs SA3 and SA4, which briefly close the switching elements S3 and S4.
  • the input terminal 16.1 of the magnet coil 16 is now connected to the positive pole of the voltage source and the input terminal 16.2 is connected to the negative pole of the voltage source, and thus a current pulse flows in the opposite direction through the magnet coil 16.
  • the voltage limiter circuit Z prevents the voltage across the input terminals 16.1 and 16.2 from rising above a certain value, which also limits the amplitude of the closing pulse flowing through the coil. That way it can Power ratio of opening pulse to closing pulse can be set.
  • the storage capacitors C1 and C2 ensure the functioning of the control device, although when the switch S is opened there is no longer a supply voltage. This arrangement has the effect, as can be seen, that even in the event of a complete failure of the power source V, the valve is re-closed by a closing pulse being emitted.
  • the first control device ST1 for voltage monitoring and the second control device ST2 for pulse generation can be constructed in a manner known per se. This is not described further. Of course, it can be provided that the voltage monitoring device emits an alarm signal in the event of a failure of the supply voltage or a drop in the supply voltage below a predetermined value.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Chemical Vapour Deposition (AREA)
  • Electromagnets (AREA)
  • Servomotors (AREA)
EP92100550A 1991-02-08 1992-01-15 Servo-soupape actionnée par d'incorporés et commandée par une soupape magnétique bistable pour moyens liquides et gazeux Expired - Lifetime EP0498173B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4103777A DE4103777A1 (de) 1991-02-08 1991-02-08 Eigenmediumbetaetigtes, durch ein bistabiles magnetventil gesteuertes servoventil fuer fluessige und gasfoermige medien
DE4103777 1991-02-08

Publications (2)

Publication Number Publication Date
EP0498173A1 true EP0498173A1 (fr) 1992-08-12
EP0498173B1 EP0498173B1 (fr) 1995-03-01

Family

ID=6424609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100550A Expired - Lifetime EP0498173B1 (fr) 1991-02-08 1992-01-15 Servo-soupape actionnée par d'incorporés et commandée par une soupape magnétique bistable pour moyens liquides et gazeux

Country Status (7)

Country Link
US (1) US5180138A (fr)
EP (1) EP0498173B1 (fr)
JP (1) JPH04311007A (fr)
AT (1) ATE119310T1 (fr)
DE (2) DE4103777A1 (fr)
DK (1) DK0498173T3 (fr)
ES (1) ES2069321T3 (fr)

Families Citing this family (26)

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AU663990B2 (en) * 1992-11-10 1995-10-26 Caterpillar Inc. Solenoid valve assembly
DE4326838C2 (de) * 1993-08-10 1996-01-11 Interelektrik Ges M B H & Co K Bistabiles Magnetventil
US5687693A (en) * 1994-07-29 1997-11-18 Caterpillar Inc. Hydraulically-actuated fuel injector with direct control needle valve
US5542444A (en) * 1994-11-07 1996-08-06 Abbott Laboratories Valve and method of using
US5738138A (en) * 1997-03-10 1998-04-14 The Horton Company Reduced water hammer control valve
DE19726225B4 (de) * 1997-06-20 2008-02-07 Robert Bosch Gmbh Anordnung mit einem oder mehreren hydraulischen Stellgliedern
IT1308113B1 (it) * 1999-06-02 2001-11-29 Sit La Precisa Spa Gruppo valvolare per la modulazione della pressione di erogazione diun gas.
DE10005015B4 (de) * 2000-02-04 2008-09-18 Robert Bosch Gmbh Verfahren zum Betreiben eines Brennstoffeinspritzventils
DE20219358U1 (de) * 2002-12-13 2004-04-22 A. u. K. Müller GmbH & Co KG Eigenmediumbetätigtes Servo-Magnetventil für Flüssigkeiten, insbesondere für sanitäre Armaturen
DE50303266D1 (de) * 2002-02-19 2006-06-14 Schrott Harald Bistabiles elektromagnetisches Ventil
DE102004050042B3 (de) * 2004-10-08 2006-04-27 J. Schmalz Gmbh Ejektor
US7370651B2 (en) * 2005-04-01 2008-05-13 Ric Investments, Llc Gas conserving device
JP4487845B2 (ja) * 2005-05-02 2010-06-23 株式会社デンソー 電磁弁
EP1749941A1 (fr) * 2005-08-01 2007-02-07 Sanimatic Ag Actuateur hydraulique, notamment pour dispositif de commande de chasse d'eau.
DE202006001009U1 (de) * 2006-01-24 2007-06-06 A. u. K. Müller GmbH & Co KG Eigenmediumbetätigtes durch einen Magnetanker gesteuertes Servoventil
DE102008014099B4 (de) * 2007-03-27 2012-08-23 Mando Corp. Ventil für ein Antiblockierbremssystem
US20090309054A1 (en) * 2008-06-11 2009-12-17 Automatic Switch Company System and method of operating a solenoid valve at minimum power levels
DE102009045773A1 (de) * 2009-10-16 2011-04-21 Prominent Dosiertechnik Gmbh Druckhalteventil
IT1403351B1 (it) * 2010-12-21 2013-10-17 Sit La Precisa Spa Con Socio Unico Dispositivo per il controllo dell'erogazione di un gas combustibile verso un bruciatore, particolarmente per apparecchi riscaldatori di acqua
CN102705519A (zh) * 2012-06-12 2012-10-03 上海尚泰环保配件有限公司 一种带有杯形滑动阀片的电磁脉冲阀
CN206617634U (zh) * 2017-03-27 2017-11-07 上海荣威塑胶工业有限公司 节水阀及喷水玩具
CN206656002U (zh) * 2017-03-27 2017-11-21 上海荣威塑胶工业有限公司 节水阀及喷水玩具
DE202017103194U1 (de) 2017-05-26 2018-08-28 Neoperl Gmbh Sanitärventil
EP3409989B1 (fr) * 2017-05-31 2021-09-15 Hamilton Sundstrand Corporation Servosoupape pneumatique ayant une unité d'entraînement réglable
WO2019004000A1 (fr) 2017-06-26 2019-01-03 株式会社Ｌｉｘｉｌ Électrovanne pilote
CN113069654A (zh) * 2020-01-03 2021-07-06 通用电气精准医疗有限责任公司 磁阻尼器及包括磁阻尼器的单向阀和麻醉呼吸机

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DE3323982A1 (de) * 1983-07-02 1985-01-10 Messerschmitt Boelkow Blohm Bistabile, elektromagnetische betaetigungsvorrichtung
DE3323370A1 (de) * 1983-06-29 1985-01-17 Cornelius Dipl Ing Lungu Impulsgesteuerte hubmagnetantriebe
DE3402768A1 (de) * 1984-01-27 1985-08-01 Thyssen Edelstahlwerke Ag Bistabiles magnetisches stellglied
DE3803938A1 (de) * 1987-02-13 1988-08-25 Lectron Products Einrichtung mit einem bistabilen elektromagnetischen betaetigungsorgan
DE3810154A1 (de) * 1988-03-25 1989-10-05 Kuhnke Gmbh Kg H Elektromagnetventil mit dauermagnethaltung
DE3822830A1 (de) * 1988-07-06 1990-01-11 Mueller A & K Gmbh Co Kg Eigenmediumbetaetigtes, durch ein bistabiles magnetventil servogesteuertes ventil fuer fluessige medien
DE3907057A1 (de) * 1989-03-04 1990-09-13 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes

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DE1650449B2 (de) * 1967-04-26 1971-03-11 Kabushiki Kaisha Meiki Seisakusho Nagova, Aichi (Japan) Elektromagnetisches ventil
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DE3237532A1 (de) * 1982-10-09 1984-04-12 Robert Bosch Gmbh, 7000 Stuttgart Schaltventil
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SU1207318A1 (ru) * 1983-11-21 1987-03-07 Всесоюзный научно-исследовательский и проектно-конструкторский институт промышленных гидроприводов и гидроавтоматики Пропорциональный электромагнит
SU1451358A1 (ru) * 1986-12-18 1989-01-15 Borisov Lev A Электрогидравлическое устройство переключени
JP2742792B2 (ja) * 1988-06-28 1998-04-22 清原 まさ子 電磁制御装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323370A1 (de) * 1983-06-29 1985-01-17 Cornelius Dipl Ing Lungu Impulsgesteuerte hubmagnetantriebe
DE3323982A1 (de) * 1983-07-02 1985-01-10 Messerschmitt Boelkow Blohm Bistabile, elektromagnetische betaetigungsvorrichtung
DE3402768A1 (de) * 1984-01-27 1985-08-01 Thyssen Edelstahlwerke Ag Bistabiles magnetisches stellglied
DE3803938A1 (de) * 1987-02-13 1988-08-25 Lectron Products Einrichtung mit einem bistabilen elektromagnetischen betaetigungsorgan
DE3810154A1 (de) * 1988-03-25 1989-10-05 Kuhnke Gmbh Kg H Elektromagnetventil mit dauermagnethaltung
DE3822830A1 (de) * 1988-07-06 1990-01-11 Mueller A & K Gmbh Co Kg Eigenmediumbetaetigtes, durch ein bistabiles magnetventil servogesteuertes ventil fuer fluessige medien
DE3907057A1 (de) * 1989-03-04 1990-09-13 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes

Also Published As

Publication number Publication date
JPH04311007A (ja) 1992-11-02
EP0498173B1 (fr) 1995-03-01
DK0498173T3 (da) 1995-07-24
ES2069321T3 (es) 1995-05-01
DE4103777A1 (de) 1992-08-13
DE59201479D1 (de) 1995-04-06
US5180138A (en) 1993-01-19
ATE119310T1 (de) 1995-03-15

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