EP0111637A1 - Système pour capter et régler la vitesse du piston d'un cylindre - Google Patents

Système pour capter et régler la vitesse du piston d'un cylindre Download PDF

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Publication number
EP0111637A1
EP0111637A1 EP83109166A EP83109166A EP0111637A1 EP 0111637 A1 EP0111637 A1 EP 0111637A1 EP 83109166 A EP83109166 A EP 83109166A EP 83109166 A EP83109166 A EP 83109166A EP 0111637 A1 EP0111637 A1 EP 0111637A1
Authority
EP
European Patent Office
Prior art keywords
piston
pressure medium
speed
throttle
pressure
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.)
Ceased
Application number
EP83109166A
Other languages
German (de)
English (en)
Inventor
Hans Friedrich Dipl.-Ing. Meyer
Werner Dannenberg
Rolf Heise
Hans Jürgen Ing-grad. Pfeifer
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.)
Wabco Westinghouse Steuerungstechnik and Co GmbH
Original Assignee
Wabco Westinghouse Steuerungstechnik and Co 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 Wabco Westinghouse Steuerungstechnik and Co GmbH filed Critical Wabco Westinghouse Steuerungstechnik and Co GmbH
Publication of EP0111637A1 publication Critical patent/EP0111637A1/fr
Ceased 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 device for detecting and regulating the speed of the piston of a working cylinder according to the preamble of patent claim 1.
  • Devices of this type are required, for example, in industrial use of working cylinders in order to be able to keep the speed of the piston approximately constant even when the piston rod is subjected to changing loads. It is conceivable for this purpose to determine the speed of the working piston by means of a sensor device arranged in the region of the piston rod and an evaluation and control circuit connected to the sensor device, to compare the actual speed value with a predetermined desired speed value and with to control a pressure control valve based on a signal derived from the difference value.
  • the pressure control valve must be arranged between the pressure medium source and the inlet valve upstream of the pressure medium chamber of the working cylinder.
  • Such a device has the disadvantage that with a rapidly decreasing load on the piston rod, in particular after a previous pressure increase in the pressure medium chamber of the working cylinder, the working piston cannot be decelerated quickly enough and thus the piston speed cannot be influenced in this phase.
  • the invention is therefore based on the object of providing a device of the type mentioned at the outset which makes it possible to maintain a predetermined piston speed or to achieve a predetermined course of the piston speed even with changing loading of the piston rod.
  • the invention offers the advantage in particular of achieving an almost constant piston speed both with rapidly changing loads on the piston rod and with fluctuations in the working pressure.
  • the figure shows a working cylinder with a device for generating piston speed-dependent signals and a throttle valve device with the pressure medium outlet valves of the pressure medium chambers of the Ar beitszylinders is connected.
  • the working cylinder shown in the figure consists essentially of a cylinder 1, in which a piston 4 provided with a circumferential seal 3 is arranged.
  • the piston 4 is connected to a piston rod 9 which is led out of the cylinder 1 through a recess provided in the cylinder cover 7.
  • a sealing ring 8 surrounding the piston rod 9 is mounted in the recess.
  • the piston 4 divides the working cylinder 9 into a first pressure medium chamber 10 on the piston rod side and a second pressure medium chamber 2 opposite the first pressure medium chamber 10 on the other side of the piston 4.
  • the first pressure medium chamber 10 has a pressure medium connection 41, which is connected via a first pressure medium line 40 to a first valve device 34, consisting of a first - inlet and outlet valve, is connected.
  • a pressure medium connection 39 leading to the second pressure medium chamber 2 is connected to a second valve device 35, consisting * of inlet and outlet valves.
  • the inputs of the valve devices 34, 35 are connected to a pressure medium source 33 via pressure medium lines 45, 44.
  • the outlet valve of the first valve device 34 and the outlet valve of the second valve device 35 are connected via a shuttle valve 32 to a common pressure medium line 31, 30.
  • a first branch line 18 leads from the pressure medium line 30 to a first switchable throttle 22, 26.
  • a second branch line 19 leads to a second switchable throttle 23, 27, a third branch line 20 leads to a third switchable throttle 24, 28 and a fourth branch line 21 leads to a fourth switchable throttle 25, 29.
  • the switchable throttles each consist of a simple directional valve with a downstream throttle.
  • the valve devices 34, 35 can be combined into a single multi-way valve device.
  • the switchable chokes 22, 26, 27, 24, 28, and 25, 29 are via control lines 16, 17, 15, 14 with the outputs an electronic evaluation and control circuit 12 connected.
  • a first input of the electronic evaluation and control circuit 12 is connected via a signal line 11 to a sensor 6, which is arranged in the cylinder cover 7 of the working cylinder 1 perpendicular to the piston rod 9.
  • the sensor 6 and the piston rod 9 are designed such that when the piston rod 9 drives past a pole piece of the sensor 6, signals are generated which represent the instantaneous speed of the piston 4 and the piston rod 9, respectively.
  • the piston rod 9 sensed by the sensor 6 can, for example, have a thread 5 and be surrounded by a jacket made of non-magnetizable material.
  • a second input 13 of the electronic evaluation and control circuit is used to enter target values.
  • the TARGET speed value is compared with the ACTUAL speed value and, when a difference between the two values occurs, a control signal is generated which is applied to one or more of the switchable chokes.
  • the valve devices 34, 35 connected to the pressure medium source are connected via control lines 37, 36 to a switching device, not shown here.
  • the first pressure medium chamber 10 is via the pressure medium connection 41, the outlet valve of the 3/2-way valve 34, the Shuttle valve 32 and the downstream throttles 22, 26, 23, 27, 24, 28, 25, 29 vented to the atmosphere.
  • the magnetic field building up between the piston rod 9 and the pole piece of the sensor 6 alternately becomes stronger and weaker as the piston rod 9 passes the sensor 6, depending on whether there is an increase or a decrease in the thread mentioned above under the pole piece of the sensor 6.
  • the sensor 6 outputs an output voltage, which can be sinusoidal, for example.
  • This output voltage passes through the signal line 11 to the evaluation circuit of the electronic evaluation and control circuit 12.
  • the evaluation circuit is designed, for example, in such a way that it generates a pulse when the magnetic field reaches a strength which can only be achieved when an increase in the thread length passes the pole piece of the sensor. 6 occurs.
  • the pulses occurring per unit of time are counted by the evaluation circuit and the speed of the piston 4 or the piston rod 9 is thus determined.
  • the ACTUAL speed determined in this way is compared with a TARGET speed given to the evaluation circuit via line 13. If the ACTUAL speed value exceeds the TARGET speed value, an output signal is generated.
  • one or more throttles are controlled via lines 17, 16, 15, 14.
  • the pressure reduction in the first pressure medium limiter 10 is throttled until the ACTUAL -Speed corresponds to the TARGET speed.
  • the pressure reduction in the first pressure medium limiter 10 is throttled until the ACTUAL -Speed corresponds to the TARGET speed.
  • four switchable throttles with the same throttle cross-section it is possible to obtain up to four different throttle cross-sections by simultaneously controlling several throttles. If the throttles have different throttle cross sections, considerably more different effective throttle cross sections can be set in a known manner for venting the pressure medium chambers of the working cylinder.
  • a constant pressure in one of the two pressure medium chambers 10 or 2 and throttled pressure reduction in the other Pressure medium chamber 2 or 10 it is also possible to achieve different constant piston speeds, regardless of whether the piston rod 9 and thus the piston 4 are loaded more or less.

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)
  • Fluid-Pressure Circuits (AREA)
EP83109166A 1982-12-16 1983-09-16 Système pour capter et régler la vitesse du piston d'un cylindre Ceased EP0111637A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823246537 DE3246537A1 (de) 1982-12-16 1982-12-16 Einrichtung zum erfassen und regeln der geschwindigkeit des kolbens eines arbeitszylinders
DE3246537 1982-12-16

Publications (1)

Publication Number Publication Date
EP0111637A1 true EP0111637A1 (fr) 1984-06-27

Family

ID=6180807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109166A Ceased EP0111637A1 (fr) 1982-12-16 1983-09-16 Système pour capter et régler la vitesse du piston d'un cylindre

Country Status (2)

Country Link
EP (1) EP0111637A1 (fr)
DE (1) DE3246537A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0525547A1 (fr) * 1991-07-17 1993-02-03 Pioneer Electronic Corporation Système de contrôle hydraulique pour un actionneur
EP0708250A3 (fr) * 1994-10-20 1998-05-20 Smiths Industries Public Limited Company Systèmes hydrauliques
WO2000014413A1 (fr) * 1998-09-04 2000-03-16 Delaval Holding Ab Dispositif de protection permettant de controler le mouvement d'un verin pneumatique
CN102356241A (zh) * 2009-03-18 2012-02-15 美卓造纸机械公司 液压致动器设备和纤维幅材机的幅材卷和/或卷取轴的处理设备
CN102606562A (zh) * 2012-03-20 2012-07-25 王凡 双作用气缸垂直负载的定位控制机构
DE102011013187A1 (de) 2011-03-05 2012-09-06 Festo Ag & Co. Kg Abluftnutzschaltung
WO2017076965A1 (fr) * 2015-11-06 2017-05-11 Pleiger Maschinenbau Gmbh & Co. Kg Procédé et dispositif de commande d'une unité d'entraînement à actionnement hydraulique d'un élément de robinetterie
DE102017109828A1 (de) * 2017-05-08 2018-11-08 Pintsch Bubenzer Gmbh Fluidsteuerung, Bremslüftgerät, Bremsanordnung
EP4379218A1 (fr) * 2022-12-01 2024-06-05 Zöller-Kipper GmbH Arrangement hydraulique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1267987A (en) * 1968-09-13 1972-03-22 Bergwerksverband Gmbh Hydraulic thrust-piston mechanism
US3700396A (en) * 1971-06-16 1972-10-24 Abex Corp Electro-hydraulic flow control circuit
DE2908583A1 (de) * 1979-03-05 1980-09-18 Wabco Fahrzeugbremsen Gmbh Einrichtung zur endabbremsung des arbeitskolbens eines doppeltwirkenden arbeitszylinders
DE3213135A1 (de) * 1981-04-24 1982-11-04 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Elektrohydraulischer stellantrieb

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH396643A (de) * 1962-03-02 1965-07-31 Westinghouse Bremen Ges Mbh Pneumatische Regeleinrichtung zur wahlweisen Einstellung und zur Konstanthaltung der Abtriebsdrehzahl von Kraftmaschinen und regelbaren Getrieben bei veränderlicher Abtriebsleistung
DE2156972C3 (de) * 1971-11-17 1975-09-04 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Einrichtung mit einem Ventil zur Beeinflussung der Drehzahl einer ein Kraftfahrzeug antreibenden Kraftmaschine
DE2419474A1 (de) * 1974-04-23 1975-11-13 Smg Sueddeutsche Maschinenbau Steuerung fuer hydraulische schweisspressen
DE3130056C2 (de) * 1981-07-30 1983-11-17 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Steuerventilanordnung für einen Druckmittel-Arbeitszylinder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1267987A (en) * 1968-09-13 1972-03-22 Bergwerksverband Gmbh Hydraulic thrust-piston mechanism
US3700396A (en) * 1971-06-16 1972-10-24 Abex Corp Electro-hydraulic flow control circuit
DE2908583A1 (de) * 1979-03-05 1980-09-18 Wabco Fahrzeugbremsen Gmbh Einrichtung zur endabbremsung des arbeitskolbens eines doppeltwirkenden arbeitszylinders
DE3213135A1 (de) * 1981-04-24 1982-11-04 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Elektrohydraulischer stellantrieb

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ÖLHYDRAULIK UND PNEUMATIK, Band 18, Nr. 4, 1974 H. BEER "Aufbau und Ausführungsarten elektrohydraulischer Servoantriebe", Seiten 313-318 *
Patent Abstracts of Japan Band 5, Nr. 25, 14. Februar 1981 & JP-A-55-152901 *
SOVIET Inventions Illustrated Sektion Q57, Week D36, 14. Oktober 1981 & SU-A-787741 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5313871A (en) * 1991-07-17 1994-05-24 Pioneer Electronic Corporation Hydraulic control system utilizing a plurality of branch passages with differing flow rates
EP0525547A1 (fr) * 1991-07-17 1993-02-03 Pioneer Electronic Corporation Système de contrôle hydraulique pour un actionneur
EP0708250A3 (fr) * 1994-10-20 1998-05-20 Smiths Industries Public Limited Company Systèmes hydrauliques
WO2000014413A1 (fr) * 1998-09-04 2000-03-16 Delaval Holding Ab Dispositif de protection permettant de controler le mouvement d'un verin pneumatique
US6405632B1 (en) 1998-09-04 2002-06-18 Delaval Holding Ab Protection device for controlling the motion of a pneumatic actuator
CN102356241A (zh) * 2009-03-18 2012-02-15 美卓造纸机械公司 液压致动器设备和纤维幅材机的幅材卷和/或卷取轴的处理设备
DE102011013187B4 (de) * 2011-03-05 2012-10-04 Festo Ag & Co. Kg Abluftnutzschaltung
DE102011013187A1 (de) 2011-03-05 2012-09-06 Festo Ag & Co. Kg Abluftnutzschaltung
CN102606562A (zh) * 2012-03-20 2012-07-25 王凡 双作用气缸垂直负载的定位控制机构
WO2017076965A1 (fr) * 2015-11-06 2017-05-11 Pleiger Maschinenbau Gmbh & Co. Kg Procédé et dispositif de commande d'une unité d'entraînement à actionnement hydraulique d'un élément de robinetterie
US20180328386A1 (en) * 2015-11-06 2018-11-15 Pleiger Maschinenbau Gmbh & Co. Kg Method and device for controlling a hydraulically actuated drive unit of a valve
US10731675B2 (en) * 2015-11-06 2020-08-04 Pleiger Maschinenbau Gmbh & Co. Kg Method and device for controlling a hydraulically actuated drive unit of a valve
RU2731353C2 (ru) * 2015-11-06 2020-09-01 Пляйгер Машиненбау Гмбх Унд Ко. Кг Способ и устройство для управления гидравлически активируемым приводным узлом арматуры (варианты)
DE102017109828A1 (de) * 2017-05-08 2018-11-08 Pintsch Bubenzer Gmbh Fluidsteuerung, Bremslüftgerät, Bremsanordnung
EP4379218A1 (fr) * 2022-12-01 2024-06-05 Zöller-Kipper GmbH Arrangement hydraulique

Also Published As

Publication number Publication date
DE3246537A1 (de) 1984-06-20

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19840409

AK Designated contracting states

Designated state(s): AT BE CH DE FR IT LI NL SE

17Q First examination report despatched

Effective date: 19860323

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19860719

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HEISE, ROLF

Inventor name: MEYER, HANS FRIEDRICH, DIPL.-ING.

Inventor name: DANNENBERG, WERNER

Inventor name: PFEIFER, HANS JUERGEN, ING-GRAD.