WO2012167960A1 - Régulateur de pression numérique pneumatique et dispositif de commande d'élément réglé comportant ce régulateur - Google Patents

Régulateur de pression numérique pneumatique et dispositif de commande d'élément réglé comportant ce régulateur Download PDF

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Publication number
WO2012167960A1
WO2012167960A1 PCT/EP2012/054337 EP2012054337W WO2012167960A1 WO 2012167960 A1 WO2012167960 A1 WO 2012167960A1 EP 2012054337 W EP2012054337 W EP 2012054337W WO 2012167960 A1 WO2012167960 A1 WO 2012167960A1
Authority
WO
WIPO (PCT)
Prior art keywords
pneumatic
pressure regulator
valves
digital
actuator
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
PCT/EP2012/054337
Other languages
German (de)
English (en)
Inventor
Ville Hopponen
Arto Ikonen
Pekka Vantola
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.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
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 Metso Paper Oy filed Critical Metso Paper Oy
Priority to DE112012002371.4T priority Critical patent/DE112012002371A5/de
Publication of WO2012167960A1 publication Critical patent/WO2012167960A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0426—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling the number of pumps or parallel valves switched on
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • G05D16/2033—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged in series
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40592—Assemblies of multiple valves with multiple valves in parallel flow paths

Definitions

  • the invention relates to a digital pneumatic pressure regulator for controlling pressure and / or flow of a working fluid in a machine for producing a fibrous web, in particular a paper or board machine. Furthermore, a pneumatic actuator control arrangement is provided with at least one digital pneumatic pressure regulator according to the invention.
  • actuating cylinders are widely used as actuating and control means. These adjusting cylinders are preferably driven pneumatically or hydraulically, so that adjusting forces can be adjusted and applied with high accuracy.
  • a working fluid such. As air, gas, pneumatic fluid, hydraulic fluid, water, different gases or emulsions of the previous fluids, etc., used, which is pressurized by a pump.
  • a pneumatic cylinder, hydraulic cylinder, pneumatic motor or hydraulic motor is usually controlled by a proportional control valve (proportional valve), which can be driven electrically, hydraulically or pneumatically.
  • Such a control valve has a spool or spool reciprocable in a valve housing which, in response to its location in the valve housing, can adjust a desired pressure at the outlet by controlling the pressure of the working fluid delivered by the pump.
  • the mobility of the control piston in the valve housing necessarily requires a certain clearance or gap between the control piston and valve housing, so that a leakage of working fluid within the control valve is unavoidable.
  • the gap size may not too tight, otherwise the valve will be too susceptible to contamination in the working fluid.
  • a digital pneumatic pressure regulator consists of a series of valves connected in parallel, which only have an OPEN / CLOSE function; These are simple on / off switching valves (so-called 2/2 way valves or one-way valves) that can allow or interrupt fluid flow and are referred to in this application as directional control valves, digital valves or simply valves.
  • the valves are all connected to a common supply line on the one hand and to a common outlet line on the other hand.
  • the valves themselves may be conventional solenoid valves, i. Be valves with electromagnetic drive. Such electromagnetically actuated valve is z. As described in EP 1 052 441 A2. Other forms of drive can be chosen.
  • valves By connecting or installing throttle elements to the valves or by the design of the valves themselves, it is ensured that the valves have different flows when they are open. For example, if four valves are provided, then the flow rates Q in the individual passages selectively releasable from the associated valve may be in the ratio of 1: 2: 4: 8, and so on; for a larger number of valves this series will continue accordingly.
  • valves are either open or closed, ie, to maintain a desired pressure in a closed (and thus stationary) system, the valves of the pressure regulator are simply closed and there are no leakage currents inside the valves.
  • This is a clear difference to the conventional proportional valve, which is always flowed through by a working fluid flow. This constantly costs energy eg for pumps, actuators, etc. in the paper or board machine.
  • An electrical power supply circuit of the respective valves of the digital pneumatic pressure regulator for example for electromotive, electromagnetic valve actuation, usually has a load circuit and a control circuit.
  • the actuatable actuator of the respective valves is acted upon by the load current.
  • the load circuit generally includes a main power source, an electrical fuse, a relay, a main contactor, a motor protection switch, and the valve as a load, with electrical leads connecting these elements to each other in the load circuit.
  • the electrical lines and contacts in the load circuit can be dimensioned so that the high currents occurring can be controlled.
  • the load circuit is to be distinguished from a control circuit.
  • the control circuit includes the necessary logic (eg, I / O control cards as control devices) for controlling the main circuit and a control voltage source, and is connected to control voltage terminals of the relay with the relay in the control circuit.
  • the relay is activated by appropriate control (control) commands of the input / output control boards via the control circuit and thus can switch the load circuit to obtain the desired valve position.
  • the components of the digital pneumatic pressure regulator (voltage sources, valves, electrical circuits of the circuits, etc.) are usually arranged in a housing (pressure regulator block).
  • the object of the invention is achieved with a digital pneumatic pressure regulator for controlling pressure and / or flow of a working fluid in a machine for producing a fibrous web, in particular a paper or paperboard machine, having the features of claim 1. Furthermore, a pneumatic actuator control arrangement with at least one pressure regulator according to the invention and with at least one pneumatic actuator in claim 8 is shown.
  • a digital pneumatic pressure regulator for controlling pressure and / or flow of a working fluid in a machine for producing a fibrous web, in particular a paper or board machine.
  • the pressure regulator has at least two directional control valves and input / output control units assigned to the respective directional control valves whose control signal output power is adjusted such that an actuator of the respective directional control valves can be actuated by the respective control signal output power in order to change a valve position.
  • the following explanations always refer to a paper or board machine; However, this term is expressly to include all types of machines for the production of fibrous webs, so in particular also board machines, fibreboard machines and the like.
  • a digital pneumatic pressure regulator is used instead of a conventional proportional valve, with the position of an actuator to be controlled by the regulator unchanged, the internal leakage current in the regulator will be zero.
  • the positioning movements eg during start-up processes, web breaks and new threading of the web, reel change or maintenance measures, which are usually carried out by means of cylinders acting on the components to be adjusted in the paper or board machine, comprise a movement process of a cylinder and / or optionally . a pressure build-up to z. B. to generate any mechanical compressive forces.
  • the inventors have now found that in the digital pneumatic pressure regulator having at least two directional control valves and input / output control units associated with the respective directional control valves, the respective control signal output power of the input / output control units (eg, input / output control cards) assigned to the valves is sufficient to actuate the actuator of the respective directional valves, so that the valve position is changed.
  • a separate power electronics for signal amplification is not required or can be dispensed with the installation of relays, since the valves are connected to outputs of their associated I / O control units, so that no other electrical components, the control signal output power of inputs / Can actively change output control unit, between the respective associated input / output control unit and the valve are arranged.
  • valves of the digital pneumatic pressure regulator z For example, 2/2 solenoid valves from FESTO, preferably the MHE2 series, may be used as quick-acting valves.
  • the principle of digital pneumatics can also be used for flow regulators.
  • large valves with large cross-sections are used to control the considerable volume flows of the working fluid whose control accuracy is limited.
  • digital pneumatic valve arrangements the flows of working fluids can be controlled very precisely and responsively by opening or closing the valves with the corresponding flow rates, as described above.
  • the digital hydraulic controller arrangements described above are generally operated with pneumatic fluid (eg air) as the working fluid.
  • the working fluid may also be an aqueous emulsion or even simple water.
  • the viscosity of oil is temperature dependent.
  • the throttle effect shows a significant dependence on the viscosity of the working fluid.
  • the temperature has only a slight influence on the viscosity, so that the temperature sensitivity of the system is low. Thus, it is not necessary to consider the temperature of the working fluid at the place of use of the digital pneumatic controller.
  • the input / output control unit may be electrically connected directly to the directional control valve.
  • the input / output control units are connected directly to the directional control valves or they are connected via electrical cables to the directional control valves.
  • the term "direct” includes both the arrangement in which the output terminals of the input / output control unit are coupled (plugged, screwed, clamped, etc.) to the input ports of the directional control valve, and the arrangement in which the output terminals of the input / output control unit are Output control unit are connected via electrical cables to the input terminals of the directional control valve.
  • the electrical cables can be accommodated and guided in a terminal block housing. This is particularly advantageous if long distances (conduction paths) between the input / output control unit and the valve to be controlled available.
  • the electrical cables can be summarized, picked up and arranged at predetermined locations within a paper or board machine.
  • Each directional control valve is preferably a 2/2 way valve and thus a through valve.
  • Each directional control valve may be a shuttle valve having a drive coil that has a relatively low coil control pick-up power (eg, up to 5W).
  • a pneumatic actuator control arrangement is provided with at least one digital pneumatic pressure regulator according to the invention and with at least one pneumatic actuator comprising an actuator housing with at least one chamber, the digital pneumatic pressure regulator being associated with at least one of the actuator chambers of the pneumatic actuator to control the pressure and / or flow of a working fluid to adjust the chamber.
  • valves have different flow rates when opened. For example, if six valves are provided, the flow rates Q in the individual, each of the associated valve selectively releasable passages in the ratio of z. For example, 1: 2: 4: 8: 16: 32; for a larger number of valves this series will continue accordingly.
  • the control of the directional control valves can be carried out on the basis of mathematical models.
  • the valves of the pressure regulator can be switched on the basis of the models to the desired Adjusting pressure and / or flow of a working fluid in the actuator chambers of the pneumatic actuator.
  • the pneumatic actuator may be a pneumatic hose or a pneumatic cylinder, which comprises a cylinder housing as a actuator housing and a movable piston in the cylinder housing.
  • the pneumatic actuator control assembly has a measuring unit provided on the pneumatic cylinder to determine the position of the piston in the cylinder housing.
  • the measurement unit may include at least one of a displacement sensor, a temperature sensor, a pressure sensor, and a flow sensor to directly or indirectly sense the actual position of the piston in the cylinder.
  • the positions of the valves of the digital pneumatic pressure regulator can thus be determinable or regulated on the basis of the measurement result of the measuring unit.
  • each pneumatic actuator is pneumatically connected via a directional control valve to the at least one digital pneumatic pressure regulator in order to provide a pneumatic multiplex arrangement.
  • the pneumatic actuator control arrangement is preferably used in a winding stopper.
  • a pneumatic multiplex arrangement is to be understood as a selection switching network in which the at least one digital pneumatic pressure regulator is pneumatically connected to the pneumatic actuators via a respective directional control valve associated with a respective pneumatic actuator of the plurality of pneumatic actuators so that the number of input signals of the pressure regulator (ie different pressures and / or flows) by switching the respective directional valves to the respective pneumatic actuators as needed can be switched.
  • a single or multiple digital pneumatic pressure controllers can provide the desired switching state (load condition, position, force application, etc. of the pneumatic actuators to be provided) of the pneumatic actuators. All types of parallel and serial switching states on the pneumatic actuators can be switched with this multiplex arrangement.
  • the at least one digital pneumatic pressure regulator may provide (control) a common or different coil-specific (load-dependent) selected pressure on each actuator.
  • the digital pneumatic pressure regulator may be used to reduce the number of components used, since, for example, a digital pneumatic pressure regulator is sufficient to control the pressure and / or flow at several actuators simultaneously or individually.
  • FIG. 1 shows a schematic structure of a section of a pneumatic actuator control arrangement with a digital pneumatic pressure regulator according to the invention
  • FIG. 2 shows a schematic structure of a portion of a pneumatic actuator control assembly having a digital pneumatic pressure regulator according to the invention pneumatically connected by way valves to pneumatic actuators to form a pneumatic multiplexing assembly.
  • the pneumatic actuator 4 has an actuator housing 3, in which a lower (cylinder bottom side) chamber 5 and an upper (cylinder head side) chamber 6 are arranged.
  • the upper chamber 6 is a chamber in which a piston of the pneumatic actuator 4 is received.
  • the pneumatic actuator 4 is in the present embodiment, a pneumatic cylinder having an actuator housing 3 (cylinder housing) and as an actuator in the cylinder housing movable piston.
  • a piston rod 41 of the pneumatic actuator (piston) 4 is disposed in the upper chamber 6 (cylinder head side chamber).
  • the piston 4 is slidably received in the usual way in the cylinder housing (actuator housing) 3 to be movable back and forth in this.
  • a measuring unit 7 (shown in the figure as a linear sensor (displacement sensor or Wegumblensensor)) is provided at the pneumatic actuator 4.
  • the measuring unit 7 serves to unambiguously determine the position of the pneumatic actuator 4 (piston position within the cylinder housing 3).
  • the positions of valves 11 (directional control valves) of the digital pneumatic pressure regulator 1 can be determined (not shown) based on the measurement results of the measuring unit.
  • the digital pneumatic pressure regulator 1 is connected to the common working fluid line 2 and connected via this with the cylinder bottom side chamber 5 to control by switching directional control valves 11, a pressure and / or flow of a working fluid in the cylinder bottom chamber 5.
  • the pressure regulator 1 has eight directional control valves 11 (ON / OFF valves, switching valves or through valves) and eight throttle elements 12.
  • the working fluid line 2 and thus the valves 11 are filled with a working fluid (for example pneumatic fluid, air, etc.).
  • the directional control valves 11 have input / output control units assigned to the respective directional control valves (not shown).
  • the respective control signal output power of the input / output control units (eg, input / output control cards) associated with the valves 11 is sufficient to operate the actuator of the respective directional control valves so that the valve position is changed.
  • a separate power electronics for signal amplification is not required or can be dispensed with the installation of relays, since the valves 11 are connected to outputs of their associated input / output control units, so that no other electrical components, the control signal output of the input / output control unit can actively change between the respective associated I / O control unit and the valve are arranged. Therefore, fewer electrical components are required to control the valves 11.
  • the coil control power of the valves 11 is low (for example, 1 to 5 W at an operating voltage of 12 or 24 V), it can be ensured that the safety of the electric circuit is high. Furthermore, the response of the circuit is improved, since the signal output of the input / output control unit corresponds to the signal input of the valve or corresponds to this. Since the input / output control units and the associated valves 11 may be the only components of the digital controller 1, the size (dimensions) of the entire controller is reduced. Further, the magnitude of the electromagnetic field generated at the actuator of the respective directional control valve 11 by the relatively small control signal output can be reduced. For the valves 11 of the digital pneumatic pressure regulator 1 z. B.
  • 2/2 solenoid valves from FESTO preferably the MHE2 series
  • FESTO preferably the MHE2 series
  • the throttle elements 12 By installing the throttle elements 12 to the directional control valves 11 is ensured that the valves 11 have different flow rates when they are open.
  • the throttling elements 12 allow the flow rates Q of the working fluid in the correspondingly associated valves 11 to be in the ratio of 1: 2: 4: 8: 16: 32: 64: 128. This ratio is not fixed to it and it can arbitrary flow rate ratios are determined by means of the throttle elements 12.
  • the directional control valves are thus connected pneumatically via the working fluid line 2, as shown schematically in FIG. 1, to the cylinder bottom side chamber 5.
  • a desired pressure (and / or flow) and thus a desired position of the pneumatic actuator 4 within the actuator housing 3 can be achieved by corresponding switching of the valves 11 of the digital pneumatic pressure regulator 11, as is also explained at the beginning of the description.
  • FIG. 2 shows a schematic structure of a section of a pneumatic actuator control arrangement with a digital pneumatic pressure regulator according to a second exemplary embodiment of the invention.
  • the digital pneumatic pressure regulator 1 is correspondingly connected to four pneumatic actuators 4 via the working fluid line 2 and via several (here: four) directional control valves 8.
  • the working fluid line 2 is divided according to the number of the respective pneumatic actuators 4 in associated fluid lines (hienvier).
  • a digital-pneumatic multiplex arrangement can be provided in which the digital-pneumatic pressure regulator 1 is assigned to the respective pneumatic actuators 4 via the working fluid line and the respective directional control valves 8.
  • the pressure and / or flow which is set by the digital pneumatic pressure regulator 1 can be provided in the pneumatic actuator (s) 4, whose directional valves 8 are in their open position.
  • All types of parallel and serial switching states on the pneumatic actuators 4 can be switched with this multiplex arrangement. That is, in this multiplex arrangement, a one or more digital pneumatic pressure regulators 1 provide the desired switching state (load state, position, force application, etc.). All types of parallel and serial switching states on the pneumatic actuators can be switched with this multiplex arrangement.
  • the measuring unit 7 is shown as a linear sensor (displacement sensor).
  • This measurement can also be made by indirect measurement, e.g. be implemented by a temperature sensor, pressure sensor and flow sensor to indirectly determine the position of the pneumatic actuator 4 in the actuator housing 3 (not shown).
  • the positions of the valves 11 of the digital pneumatic regulator 1 can be controlled accordingly on the basis of the measurement results (not shown).
  • the pneumatic actuator control assembly according to the invention may be used in a winding stopper in a paper or board machine.
  • the pneumatic actuator 4 is preferably used as an actuating cylinder or pneumatic hose in a paper or board machine as actuation and control means in order to be able to set actuating forces by means of the digital pneumatic regulator 1 according to the invention with high accuracy.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'invention porte sur un régulateur de pression numérique-pneumatique (1) destiné à commander la pression et/ou le débit d'un fluide de travail dans une machine destinée à la production d'une bande de matière fibreuse, en particulier d'une machine à papier ou à carton, comprenant au moins deux distributeurs (11) et des unités de commande d'entrée et de sortie associées aux distributeurs (11) respectifs, dont la conduite de sortie de signal de commande est calculée de sorte que, sous l'effet de la puissance de sortie du signal de commande respectif, un entraînement de réglage des distributeurs (11) puisse être actionné pour modifier une position de distributeur. L'invention concerne en outre un système de commande de l'organe de réglage pneumatique possédant au moins un régulateur de pression numérique-pneumatique (1) selon l'invention (1), et au moins un organe de réglage pneumatique (4). L'organe de réglage pneumatique comprend un boîtier d'organe de réglage (3) possédant au moins une chambre (5, 6). Le régulateur de pression numérique-pneumatique (1) est associé à au moins l'une des chambres (5, 6) de l'organe de réglage pneumatique (4) pour régler la pression et/ou le débit d'un fluide de travail dans la chambre (5, 6).
PCT/EP2012/054337 2011-06-06 2012-03-13 Régulateur de pression numérique pneumatique et dispositif de commande d'élément réglé comportant ce régulateur Ceased WO2012167960A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112012002371.4T DE112012002371A5 (de) 2011-06-06 2012-03-13 Digitalpneumatischer druckregler zur steuerung von druck und/oder durchfluss eines arbeitsfluids in einer maschine zur herstellung einer faserstoffbahn, insbesondere einer papier- oder kartonmaschine, und pneumatikstellgliedsteuerungsanordnung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011076997.8 2011-06-06
DE201110076997 DE102011076997A1 (de) 2011-06-06 2011-06-06 Digitalpneumatischer Druckregler zur Steuerung von Druck und/oder Durchfluss eines Arbeitsfluids in einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonmaschine, und Pneumatikstellgliedsteuerungs- Anordnung

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WO2012167960A1 true WO2012167960A1 (fr) 2012-12-13

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PCT/EP2012/054337 Ceased WO2012167960A1 (fr) 2011-06-06 2012-03-13 Régulateur de pression numérique pneumatique et dispositif de commande d'élément réglé comportant ce régulateur

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WO (1) WO2012167960A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114754047A (zh) * 2022-04-28 2022-07-15 江苏大学流体机械温岭研究院 一种斐波那契编码型开关阀组调控的离合压力系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763560A (en) * 1984-05-25 1988-08-16 Tokyo Precision Instruments Co., Ltd. Method and apparatus of controlling and positioning fluid actuator
DE69207474T2 (de) * 1991-05-02 1996-08-22 Eaton Corp., Cleveland, Ohio System zur Steuerung von Stellgliedern für Vorrichtungen wie Kupplungen
EP1052441A2 (fr) 1999-05-14 2000-11-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Soupape électromagnétique
DE102009026604A1 (de) * 2009-05-29 2010-12-09 Metso Paper, Inc. Hydraulikzylinderbaugruppe für eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonmaschine
DE102010035747A1 (de) * 2010-08-28 2012-03-01 Festo Ag & Co. Kg Ventileinheit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763560A (en) * 1984-05-25 1988-08-16 Tokyo Precision Instruments Co., Ltd. Method and apparatus of controlling and positioning fluid actuator
DE69207474T2 (de) * 1991-05-02 1996-08-22 Eaton Corp., Cleveland, Ohio System zur Steuerung von Stellgliedern für Vorrichtungen wie Kupplungen
EP1052441A2 (fr) 1999-05-14 2000-11-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Soupape électromagnétique
DE102009026604A1 (de) * 2009-05-29 2010-12-09 Metso Paper, Inc. Hydraulikzylinderbaugruppe für eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonmaschine
DE102010035747A1 (de) * 2010-08-28 2012-03-01 Festo Ag & Co. Kg Ventileinheit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114754047A (zh) * 2022-04-28 2022-07-15 江苏大学流体机械温岭研究院 一种斐波那契编码型开关阀组调控的离合压力系统及方法

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DE112012002371A5 (de) 2014-02-27

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