EP0118344A1 - Digitale Antriebssteuerung - Google Patents

Digitale Antriebssteuerung Download PDF

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Publication number
EP0118344A1
EP0118344A1 EP84400271A EP84400271A EP0118344A1 EP 0118344 A1 EP0118344 A1 EP 0118344A1 EP 84400271 A EP84400271 A EP 84400271A EP 84400271 A EP84400271 A EP 84400271A EP 0118344 A1 EP0118344 A1 EP 0118344A1
Authority
EP
European Patent Office
Prior art keywords
piston
valves
valve
source
disc
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.)
Withdrawn
Application number
EP84400271A
Other languages
English (en)
French (fr)
Inventor
Philippe Guillemot
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.)
MECILEC SA
Original Assignee
MECILEC SA
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 MECILEC SA filed Critical MECILEC SA
Publication of EP0118344A1 publication Critical patent/EP0118344A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves

Definitions

  • the present invention relates to numerically controlled actuators.
  • the prior art knows very many hydraulic (or more generally liquid) or pneumatic (or more generally gas) actuators into which a fluid is introduced under pressure into a cylinder and thus displaces the piston over a translation distance depending on the amount of fluid introduced and pressure (not counting in many cases, temperature).
  • actuators There are also numerous differential actuators in which the quantities and / or the fluid pressures are varied on one side and / or the other of the piston.
  • Other devices with several fluids and / or with multiple cylinders and pistons are also known. These actuators can, depending on their characteristics and the purposes sought, serve as actuators and actuators for actuators.
  • German application 31 04 704 (NYSTROM) describes an actuator having a cylinder and piston assembly defining two chambers connected to a source of pressurized fluid by non-return elements and to the atmosphere by valves with fluid control.
  • This classic system today is slow and imprecise in responses incompatible with computerization and in particular when applied in digital servomechanisms.
  • the present invention therefore relates to actuators, the general principle of which is certainly known, but suitable for digital control by making use in particular of piezoelectric valves, which allows these actuators to be digitally controlled quickly and precisely by digitally actuating l 'organ whose control and adjustment are desired.
  • one or the other of the complementary displacements situated on either side of the piston is fed into a cylinder from a source of constant pressure fluid and non-return valves.
  • the exhaust is controlled on each side by a solenoid valve, preferably numerically controlled, which causes when one of the solenoid valves comes into action the return to the exhaust pressure of the corresponding cylinder capacity and the admission of gas from the source through the non-return valve.
  • a flow limiter inserted in the gas supply allows the speed of return to the supply pressure of the displacement to be adjusted.
  • the cylinder body 31 essentially comprises a cylinder 32 in which slides a piston 33 associated with a rod 34 (simple or as in the figure, symmetrical).
  • the two complementary displacements 35 and 36 separated by the piston 33 are supplied with compressed gas at preferably constant pressure from a source not shown by an adjustable flow limiter 37 and two check valves or the like 38 and 39 bringing the fluid respectively to the displacements 35 and 36.
  • the non-return devices 38 and 39 therefore allow the displacement of the displacements but do not allow the exhaust.
  • This is done using two digital solenoid valves 40 and 41 corresponding respectively to the displacements 35 and 36. These solenoid valves communicate the displacements with a common pipe 42 allowing the escape at 43.
  • the rod 34 can control any device and for example a control valve or butterfly.
  • the two solenoid valves can be of the type shown in FIG. 2.
  • the body 1 is mounted between one of the displacements 35 or 35 and the exhaust 42. This corresponds respectively in FIG. 2 to the indices 2 and 3 (or vice versa).
  • valve itself is essentially constituted by the valve itself 4 whose central hole is normally closed by the ball 5.
  • the valve is formed by a disc with good mechanical properties and sealed, for example made of thin metal. By way of illustration, for a disc whose diameter is of the order of 10 to 30 mm, the disc will have a thickness of the order of 0.10 to 0.40 mm, the ball having a diameter of the order of 1 to 3 mm.
  • the disc 4 separates two cavities, preferably cylindrical coaxial, and of different diameters on the side 2 and on the side 3.
  • the disc 4 is mounted on the section plane right separating the two cavities of different volumes. It rests against a seal 6 inserted in a circular groove and is glued against a toroidal piezoelectric cell 7 held in place by a locking plug 8 and a circular clip 9 which is placed in a corresponding groove in the body 1.
  • a washer 10 d electrical supply is interposed between the piezoelectric toroid 7 and the blocking plug 8. The latter is drilled at 11 to connect the volume 3 and the space 12 between the plug 8 and the disc 4. All of these parts are substantially coaxial.
  • the threaded cylindrical part 13 which carries at its end on the valve side a tubular sleeve 14 in which the ball 5 can move axially.
  • the bottom of the sleeve 14 is made of hard material, for example a small circular anvil 15 on which the ball can bounce.
  • the threaded piece 13 is provided at 16 with any screwing / unscrewing means for adjusting its sinking and therefore the distance between disc 4 and anvil 15 between which the ball moves.
  • a lock nut 17 allows the piece to be locked in position threaded 13.
  • All of the component parts of the valve are preferably made of non-magnetic materials, with the exception of the ball 5 and the screw 18, the central part of which extends at 20 to receive the O-ring magnet 19.
  • Screw 18 and magnet 19 can be made of cobalt and samarium alloys.
  • the screw 18 is drilled at 21 to allow communication between the volume 2 and the space 22 located between the disc 4 and the screw 18.
  • the adjustment of the screw 18 allows that of the magnetic attraction forces acting as a return of the ball 5 against its seat in the disc 4.
  • This seat can be produced for example by electroerosion or by ultrasound which gives sharp edges then we check the edge with a ball of the same diameter as ball 5 to create the seat.
  • the radial vibrations of the toroidal cell 7 are reflected by the bulging of the disc 4 by an axial vibration of the central part of the disc and therefore of the seat of the ball 5 which bounces between this seat entering into vibration and the anvil 15.
  • the position adjustment of the anvil 15 using the threaded part 13 allows to search conditions for entry into resonance of the ball at a harmonic of the frequency of the piezoelectric cell (of the order of 50 kHz) to give an evaluation by way of illustration.
  • the amplitude of vibration of the ball is very low of the order of a few microns (5 to 10 p for example), the accelerations being of the order of a few hundred times that of gravity (250 to 350 g for example ).
  • the opening is controlled by sending a train of pulses modulated at the desired frequency.
  • the flow rate increases with the duration of the modulation pulse train and by varying the relative duration of the modulation pulse trains and the dead times separating the modulation pulse trains.
  • This can be obtained by any conventional circuit, comprising for example an AND gate, receiving on the one hand the excitation frequency and on the other hand the modification slots, followed by the amplifier necessary to have the supply voltage of the piezoelectric cell.
  • the admission of gas into chambers 35 and 36 takes place at constant pressure.
  • the maximum flow rate of the intake is defined by the limiter 37 which makes it possible to set this maximum flow rate at a value slightly lower than the maximum flow rate offered by the valves 40 and 41.
  • valves 40 and 41 By acting on the valves 40 and 41, it is therefore possible to control precise step-by-step movements of the rod 34 and of the devices which it can drive, which in particular makes it possible to perform digital actuation, as soon as pressure differences and no translation of the piston are substantially proportional.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Control Of Fluid Pressure (AREA)
EP84400271A 1983-02-14 1984-02-09 Digitale Antriebssteuerung Withdrawn EP0118344A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8302303 1983-02-14
FR8302303A FR2540945A1 (fr) 1983-02-14 1983-02-14 Actionneurs a commande numerique

Publications (1)

Publication Number Publication Date
EP0118344A1 true EP0118344A1 (de) 1984-09-12

Family

ID=9285879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400271A Withdrawn EP0118344A1 (de) 1983-02-14 1984-02-09 Digitale Antriebssteuerung

Country Status (2)

Country Link
EP (1) EP0118344A1 (de)
FR (1) FR2540945A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366605A1 (de) * 1988-10-25 1990-05-02 GebràœDer Sulzer Aktiengesellschaft Elektrohydraulische oder -pneumatische Stellvorrichtung
FR2641829A1 (fr) * 1989-01-19 1990-07-20 Danfoss As Servomecanisme commande par un fluide
DE19506469C1 (de) * 1995-02-24 1996-04-18 Honeywell Ag Doppeltwirkender elektropneumatischer Stellungsregler
GB2541485A (en) * 2016-04-14 2017-02-22 Libertine Fpe Ltd Actuator module
US10662801B2 (en) 2015-08-21 2020-05-26 Rolls-Royce Plc Actuator control

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119387552B (zh) * 2024-10-30 2025-07-08 肇庆铸技科技有限公司 可自动修正的压铸局部加压控制装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465732A (en) * 1967-10-19 1969-09-09 Physics Int Co Piezoelectric control valve
US3537355A (en) * 1966-12-14 1970-11-03 George N Bliss Fluid-operated servomechanism
DE2446963A1 (de) * 1974-10-02 1976-04-15 Bosch Gmbh Robert Stelleinrichtung
FR2498285A1 (fr) * 1981-01-19 1982-07-23 Missioux Jean Leon Distributeur hydraulique ultra-rapide
DE3104704A1 (de) * 1981-02-10 1982-08-26 Per Henrik Gösta 59030 Borensberg Nyström "servovorrichtung"

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537355A (en) * 1966-12-14 1970-11-03 George N Bliss Fluid-operated servomechanism
US3465732A (en) * 1967-10-19 1969-09-09 Physics Int Co Piezoelectric control valve
DE2446963A1 (de) * 1974-10-02 1976-04-15 Bosch Gmbh Robert Stelleinrichtung
FR2498285A1 (fr) * 1981-01-19 1982-07-23 Missioux Jean Leon Distributeur hydraulique ultra-rapide
DE3104704A1 (de) * 1981-02-10 1982-08-26 Per Henrik Gösta 59030 Borensberg Nyström "servovorrichtung"

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366605A1 (de) * 1988-10-25 1990-05-02 GebràœDer Sulzer Aktiengesellschaft Elektrohydraulische oder -pneumatische Stellvorrichtung
CH675752A5 (de) * 1988-10-25 1990-10-31 Sulzer Ag
US5148735A (en) * 1988-10-25 1992-09-22 Danfoss A/S Electrohydraulic actuator
FR2641829A1 (fr) * 1989-01-19 1990-07-20 Danfoss As Servomecanisme commande par un fluide
DE19506469C1 (de) * 1995-02-24 1996-04-18 Honeywell Ag Doppeltwirkender elektropneumatischer Stellungsregler
US10662801B2 (en) 2015-08-21 2020-05-26 Rolls-Royce Plc Actuator control
GB2541485A (en) * 2016-04-14 2017-02-22 Libertine Fpe Ltd Actuator module
GB2541485B (en) * 2016-04-14 2017-08-23 Libertine Fpe Ltd Actuator module
US11041512B2 (en) 2016-04-14 2021-06-22 Libertine Fpe Limited Actuator module

Also Published As

Publication number Publication date
FR2540945A1 (fr) 1984-08-17

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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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Inventor name: GUILLEMOT, PHILIPPE