EP0439433B1 - Distributeur à tiroir pneumatique - Google Patents

Distributeur à tiroir pneumatique Download PDF

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Publication number
EP0439433B1
EP0439433B1 EP91810048A EP91810048A EP0439433B1 EP 0439433 B1 EP0439433 B1 EP 0439433B1 EP 91810048 A EP91810048 A EP 91810048A EP 91810048 A EP91810048 A EP 91810048A EP 0439433 B1 EP0439433 B1 EP 0439433B1
Authority
EP
European Patent Office
Prior art keywords
valve
spool
pressure
drive
slide
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.)
Expired - Lifetime
Application number
EP91810048A
Other languages
German (de)
English (en)
Other versions
EP0439433A1 (fr
Inventor
Daniel Bruderer
Peter Iseli
Alois Bieri
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.)
Norgren AG
Walter AG
Original Assignee
IMI Norgren AG
Walter 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 IMI Norgren AG, Walter AG filed Critical IMI Norgren AG
Priority to AT91810048T priority Critical patent/ATE101901T1/de
Publication of EP0439433A1 publication Critical patent/EP0439433A1/fr
Application granted granted Critical
Publication of EP0439433B1 publication Critical patent/EP0439433B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram

Definitions

  • the invention relates to a pneumatic slide valve according to the preamble of independent claim 1.
  • a control valve of this type has become known in the prior art from DE-A-32 21 928 and DE-A-32 16 692.
  • EP-A-0 288 719 has disclosed a control device for a pneumohydraulic power drive, the output variable of which is a feed movement of a piston rod which is carried out with a certain force and speed.
  • this device has become freely programmable. This means that switching points, feed forces etc. are numerical can be specified precisely and thus improve the quality of the drive.
  • the function of the facility remains unchanged; no matter in which function mode it is operated. It is and remains a pneumohydraulic feed drive.
  • the invention has for its object to provide a control valve improved in terms of dynamics and slide stability.
  • the object is achieved by the invention according to claim 1.
  • the slide valve according to the invention can be switched from one operating mode to the other in any working position and shows a significantly higher dynamic and a higher slide stability.
  • the function of the slide valve according to the invention is thus clearly changed by switching the function modes.
  • the pressure control gain can be achieved can be gradually adapted to an optimal overall system dynamic. With very good linearity and minimal hysteresis, the air can be vented very quickly. Good response sensitivity is achieved even at high flow rates.
  • the slide valve according to the invention is further distinguished by a particularly compact design. Finally, this valve avoids undefined intermediate states when switching from one operating mode to the other. Further advantageous features result from the dependent claims and the following description.
  • the 3-way proportional pressure control valve shown in Fig. 1 consists essentially of a valve block 8 with two closure parts 9 and 10, a slide sleeve 6, a longitudinal slide 7 shown here in the middle position, a drive 13 and two sensors 11 and 16.
  • Pressure control valve a valve is understood that regulates the pressure on the consumer side independently of pressure fluctuations in the line network and the size of the air consumption.
  • the drive 13 is a moving coil drive and serves to move the slide 7 to regulate the pressure or the amount in its longitudinal direction.
  • the drive has the function of a converter.
  • the electrical manipulated variable is converted electromagnetically into a proportional force by the converter, which then moves the slide.
  • the drive has a coil 12 which is connected to the slide and moves in an air gap of the iron core 14 of a permanent magnet. If an electrical current flows through the coil 12, a force proportional to the current arises. One coil current direction pulls the coil 12 into the magnet and the other coil current direction pushes the coil out of the magnet.
  • the magnet consists of the closure part 10, an iron core 14 and a permanent magnet 15.
  • a pin 20 attached to the magnet extends through a cylindrical coil carrier 21 and prevents rotation.
  • a small permanent magnet 16 ' is attached to the slide to detect the position of the slide 7. This permanent magnet 16 'protrudes into a bore 9' of the closure part 9. In the bore 9 ', a Hall sensor 16' 'measures the magnetic field surrounding it, which changes in proportion to the slide position.
  • the Hall sensor 16 '' is an analog sensor. It is built on a small ceramic substrate plate. This results in very small dimensions for the position sensor 16 compared to a linear potentiometer with a similar effect.
  • the pressure sensor 11 is an analog, piezoresistive pressure sensor known per se. Under pressure, this sensor produces a change in resistance, which in turn produces an electrical voltage proportional to the change in pressure.
  • the pressure sensor 11 is screwed to the valve block 8 with pins 11 '. The electrical voltage proportional to the change in pressure is made available for processing in accordance with FIGS. 2 and 3 via line 19 to electronics 17.
  • the valve mechanism works as follows: In order to increase the pressure, a voltage jump from, for example, 2 to 8 V is applied to the setpoint input B (FIG. 3). The electronics recognizes that the actual pressure value is too low and sends an electrical current surge into the coil 12, which then moves the slide 7 from the position 4 shown in FIG. 2 to the left into the ventilation position. Shortly before the desired pressure is reached, the electronics energize the coil 12, which pushes the slide back into the central position shown in FIG. 2.
  • the setpoint is reset, for example to 2 V.
  • the sequence is then analogous to that above, except that the slide 7 in FIG. 1 is now pushed to the right into the venting position.
  • the longitudinal slide 7 is air-borne in the metal sealing bush 6.
  • the feed pressure is used, which passes from the longitudinal channel 1b via radial bores 4 in annular grooves 5 and from there between the sealing surfaces of the slide 7 and the bush 6. With insignificant air loss, simple and particularly low-wear storage is achieved.
  • the drive 13, the slide combination 6 and 7, the sensors 11 and 16 and the control electronics 17 form a functional unit that belongs together and also it is possible to switch between the pressure control valve and the proportional directional control valve during operation.
  • the dynamics of the valve are influenced and controlled by several electronic control loops, for example as shown in FIG. 3.
  • 11 denotes a pressure-voltage converter and 16 a position-voltage converter.
  • the comparator A compares the signal of the converter 11 with the electrical pressure setpoint of the input B.
  • a comparator D compares the output of the comparator A with the signal of the converter 16 and causes the slide 7 in the valve 13 to be displaced via the drive 13 of the valve E. one way or another.
  • the converter 11 and the comparator A are switched off. As can be seen, there are no mechanical, but only electronic feedbacks in this valve.
  • the inlet pressure P1 at 1 is preferably less than or equal to 12 bar and the working pressure P2 between 0 and 10 bar.
  • the supply voltage at C is 24 V DC and the electrical pressure setpoint is between 0 and 10 V DC or 4 and 20 mA.
  • An application example for the pressure control valve according to the invention is the ink metering of a printing press.
  • the pressure at outlet 2 of the valve acts on the piston surface of the cylinder of a metering slide and generates one Pressure spring counteracting positioning force and thus a certain position of the metering slide.
  • the ink layer thickness can be adjusted by changing the pressure setpoint on the pressure control valve.
  • Other examples include the uniform unwinding of a paper roll with a controlled brake cylinder, the constant pressure of a roller in a rolling mill, and the control of impacts and changes in mass in an air suspension with a rubber ball.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Pens And Brushes (AREA)
  • Braking Systems And Boosters (AREA)
  • Multiple-Way Valves (AREA)
  • Servomotors (AREA)

Claims (4)

  1. Distributeur à tiroir pneumatique, avec un entraînement (13) par lequel le tiroir (7) est déplaçable axialement, par l'intermédiaire d'un circuit de réglage, en vue de la régulation de la pression d'air, caractérisé en ce que le distributeur présente un détecteur de pression (11), destiné à relever la pression de service, et un détecteur de position (16), destiné à relever et à régler la position du tiroir, et en ce qu'il est commutable, pendant le fonctionnement, par l'intermédiaire du circuit de réglage présentant au moins deux boucles de régulateur, de telle manière qu'il fonctionne comme soupape de dosage proportionnel ou comme soupape de réglage de pression proportionnelle et que l'entraînement (13), le tiroir (7) et les détecteurs (11, 16) ainsi que l'électronique de réglage (17) constituent une unité de fonctionnement.
  2. Distributeur à tiroir suivant la revendication 1, caractérisé en ce que l'entraînement (13) est un entraînement à bobine submergée à position réglée.
  3. Distributeur à tiroir suivant la revendication 1 ou 2, caractérisé en ce que le distributeur présente une combinaison de tiroir à obturation métallique avec un fourreau de tiroir (6) et un tiroir (7) y monté à air.
  4. Distributeur à tiroir suivant l'une des revendications 1 à 3, caractérisé en ce que la dynamique du distributeur est influencée et contrôlée par plusieurs boucles de régulateur électronique et qu'il est prévu uniquement des retours électroniques.
EP91810048A 1990-01-23 1991-01-22 Distributeur à tiroir pneumatique Expired - Lifetime EP0439433B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91810048T ATE101901T1 (de) 1990-01-23 1991-01-22 Pneumatisches schieberventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH209/90 1990-01-23
CH20990 1990-01-23

Publications (2)

Publication Number Publication Date
EP0439433A1 EP0439433A1 (fr) 1991-07-31
EP0439433B1 true EP0439433B1 (fr) 1994-02-23

Family

ID=4181751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810048A Expired - Lifetime EP0439433B1 (fr) 1990-01-23 1991-01-22 Distributeur à tiroir pneumatique

Country Status (3)

Country Link
EP (1) EP0439433B1 (fr)
AT (1) ATE101901T1 (fr)
DE (1) DE59101036D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218320A1 (de) * 1992-06-03 1993-12-09 Siemens Ag Verfahren und Einrichtung zur Prüfung einer durch ein Medium angetriebenen Armatur
GB2301461A (en) * 1994-02-04 1996-12-04 Microhydraulics Inc Hydraulic valves
AU1572495A (en) * 1994-02-04 1995-08-21 Microhydraulics, Inc Hydraulic valves
US5500580A (en) * 1994-09-19 1996-03-19 Hr Textron Inc. Integrated compliance servovalve
JP4099749B2 (ja) * 2002-01-17 2008-06-11 Ｓｍｃ株式会社 エアサーボバルブ
US6792902B2 (en) 2002-04-22 2004-09-21 Borgwarner Inc. Externally mounted DPCS (differential pressure control system) with position sensor control to reduce frictional and magnetic hysteresis
DE102017106449A1 (de) 2017-03-24 2018-09-27 Böllhoff Verbindungstechnik GmbH Mehrstufige Fügevorrichtung und Fügeverfahren dafür
FR3100855A1 (fr) * 2019-09-12 2021-03-19 Centre National De La Recherche Scientifique Electrovanne à actionneur fluidique proportionnel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216692A1 (de) 1982-05-05 1983-11-10 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Elektropneumatisches servoventil
DE3221928A1 (de) 1982-06-11 1983-12-15 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Elektropneumatische vorsteuerstufe fuer ein pneumatisches servoventil
AU1587183A (en) * 1982-07-02 1984-01-05 Sperry Corp. Hydraulic valve with dual feedback control
DE3347000A1 (de) * 1983-12-24 1985-07-04 Robert Bosch Gmbh, 7000 Stuttgart Elektrohydraulische einrichtung zur steuerung eines doppeltwirkenden hydromotors
DE3710178A1 (de) 1987-04-01 1988-10-20 Antriebs Steuerungstech Ges Steuereinrichtung fuer einen pneumo-hydraulischen kraftantrieb
DE3804744A1 (de) * 1988-02-16 1989-08-24 Danfoss As Steuereinrichtung fuer einen hydraulischen stellmotor
DE3818264A1 (de) * 1988-05-28 1989-12-07 Rexroth Mannesmann Gmbh Verfahren und vorrichtung zum steuern eines antriebszylinders

Also Published As

Publication number Publication date
ATE101901T1 (de) 1994-03-15
EP0439433A1 (fr) 1991-07-31
DE59101036D1 (de) 1994-03-31

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