EP0260065B1 - Dispositif de réglage du débit - Google Patents

Dispositif de réglage du débit Download PDF

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Publication number
EP0260065B1
EP0260065B1 EP19870307773 EP87307773A EP0260065B1 EP 0260065 B1 EP0260065 B1 EP 0260065B1 EP 19870307773 EP19870307773 EP 19870307773 EP 87307773 A EP87307773 A EP 87307773A EP 0260065 B1 EP0260065 B1 EP 0260065B1
Authority
EP
European Patent Office
Prior art keywords
fluid
receiving
control device
pivot axis
pivotable member
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
Application number
EP19870307773
Other languages
German (de)
English (en)
Other versions
EP0260065A2 (fr
EP0260065A3 (en
Inventor
Dennis William Parker
David Franz Lakin
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.)
Ultra Hydraulics Ltd
Original Assignee
Ultra Hydraulics Ltd
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 Ultra Hydraulics Ltd filed Critical Ultra Hydraulics Ltd
Publication of EP0260065A2 publication Critical patent/EP0260065A2/fr
Publication of EP0260065A3 publication Critical patent/EP0260065A3/en
Application granted granted Critical
Publication of EP0260065B1 publication Critical patent/EP0260065B1/fr
Expired 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
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C3/00—Circuit elements having moving parts
    • F15C3/10—Circuit elements having moving parts using nozzles or jet pipes
    • F15C3/12—Circuit elements having moving parts using nozzles or jet pipes the nozzle or jet pipe being movable
    • 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
    • F15B13/0436—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 the pilot valves being of the steerable jet type

Definitions

  • This invention relates to fluid control devices and, in particular, fluid control devices which utilise the fluid jet principle.
  • DE-A-2264833 discloses a fluid control device comprising a pivotable member including a fluid jet channel which directs a fluid jet transverse to the pivot axis at a position remote from the pivot axis, a receiving member defining a fluid receiving channel which is positioned so as to receive the fluid jet, and actuating means operable to pivot the pivotable member about the pivot axis so as to alter the position of the fluid jet channel relative to the fluid receiving channel and to thereby vary the quantity of fluid received by the fluid receiving channel.
  • a fluid control device comprising a pivotable member having a planar major face and mounted so as to be pivotable about an axis parallel to the major face, the pivotable member including a fluid jet channel which directs a fluid jet parallel to the major face and transverse to the pivot axis at a position remote from the pivot axis, a receiving member defining a fluid receiving channel which is positioned so as to receive the fluid jet, and actuating means operable to pivot the pivotable member about the pivot axis so as to alter the position of the fluid jet channel relative to the fluid receiving channel and to thereby vary the quantity of fluid received by the fluid receiving channel, whereby the pivotable member and the receiving member are integral parts of a sheet-like element and are formed by cut outs in the element so that the pivotable member lies within the receiving member in the plane of the element and is so connected to the receiving member as to be pivotable relative to the receiving member about the pivot axis which extends in the plane of the element.
  • the pivotable member comprises a layer of substantially non-magnetisable material within which the fluid jet channel extends and a layer of magnetisable material
  • the actuating means comprises electromagnetic means for magnetically interacting with the layer of magnetisable material
  • the fluid jet channel may comprise a nozzle which is incorporated in the pivotable member.
  • the fluid jet channel is a deflector which redirects a fluid jet from a fixed nozzle towards the fluid receiving channel.
  • the pivotable member incorporates two fluid jet channels at positions remote from the pivot axis on opposite sides of the pivot axis, which channels direct two fluid jets parallel to the major face and transverse to the pivot axis in opposite directions, and the receiving member defines two fluid receiving channels, each of which is positioned opposite a respective one of the fluid jet channels to receive fluid therefrom.
  • the fluid jet channels and fluid receiving channels may be U-shaped in cross-section.
  • the actual shape of the U is a manufacturing/performance related criterion.
  • the U-shaped cross-sections are in opposition to one another.
  • the two fluid jet channels are preferably positioned equidistant from the pivot axis along a common line perpendicular to the pivot axis.
  • the receiving member and the pivotable member are integrally formed from a single sheet-like element of a material which has sufficient flexibility to allow limited pivoting of the pivotable member relative to the receiving member by the actuating means but has sufficient torsional resistance to tend to resist such pivoting.
  • a fluid control device comprises a base plate 2, a sheet-like element 3 and an upper element 4.
  • the sheet-like element 3 incorporates cut outs 5 and 6 forming a receiving member 7 surrounding an integral pivotable member 8 connected to the receiving member 7 by connecting portions 9 and 10 of sufficient flexibility to enable the pivotable member 8 to be pivoted through a limited angle about a pivot axis 11 with respect to the receiving member 7 whilst at the same time providing a certain torsional resistance to such pivotal movement.
  • the pivotable member 8 comprises not only a laminar portion 12 integrally formed with the receiving member 7 and made of substantially non-magnetizable material, but also a second laminar portion 13 made of magentizable material which overlies the first laminar portion 12 and is secured thereto mechanically or by adhesive.
  • This second laminar portion 13 constitutes an armature.
  • the upper element 4 incorporates an electromagnet 14 surrounded by suitable encapsulating material 15.
  • the electromagnet 14 incorporates a central permanent magnet 16 and an inverted U-shaped soft iron core 17 having limbs 18 and 19 defining respective opposite poles 20 and 21 disposed adjacent and parallel to a major face 22 of the pivotable member 8 on opposite sides of the pivot axis 11.
  • Each of the limbs 18 and 19 is surrounded by a respective actuating coil 23 or 24.
  • actuating coils 23 and 24 are suitably electrically energised, a variable magnetic field is superimposed upon the magnetic field associated with the permanent magnet 16 and magnetic interaction takes place between the poles 20 and 21 and the magnetizable material of the armature 13 so as to cause the pivotable member 8 to pivot about the pivot axis 11.
  • the portion 12 of the pivotable member 8 has a fluid supply passageway 25 extending therethrough parallel to the major face 22.
  • the passageway 25 comprises a first duct 26 extending along the pivot axis 11 and through the connecting portions 9 and 10, and respective further ducts 27 and 28 extending perpendicularly of the first duct 26 in opposite directions and forming fluid jet nozzles 29 and 30 where they open outwardly at opposite ends of the pivotable member 8.
  • passageways 31 and 32 comprising ducts 33 and 34 extending through the base plate 2 and ducts 35 and 36 in the receiving member 7 open opposite the fluid jet nozzles 29 and 30 and provide fluid receiving orifices 37 and 38 for receiving fluid from the nozzles 29 and 30.
  • the laminar portion 12 is formed with two U-shaped fluid jet channels 61 which act to direct fluid jets from nozzles 62 towards respective U-shaped fluid receiving channels 63.
  • the relationship of the fluid jet channels 61 to the fluid receiving channels 63 is such that they are inverted with respect to each other.
  • the nozzles 62 are mounted in the baseplate 2 of the fluid control device, so that the fluid jets therefrom impinge the fluid jet channel 61 in such a way that they are redirected (deflected) in a direction parallel to the major face 22 towards the nearest respective secondary major face 64, and the respective fluid receiving channel 63.
  • the fluid jet impinges the fluid jet channel, with respect to the direction of flow of the jet, at an acute angle, so that deflection of the jet occurs. It is envisaged that in certain fluid control devices the fluid jet may be deflected through any angle.
  • the nozzles 62 are supplied with fluid via the fluid passages 67 in the base plate 2.
  • the fluid entering the fluid receiving channel 63 passes along a passage 65 to a chamber 66 and from there onto a respective duct 33, 34.
  • Either of the above described forms of fluid control device may be used to form the first stage of a two stage electro-hydraulic servo valve.
  • FIG 8 a two stage electro-hydraulic servo valve is illustrated in which the first stage comprises the fluid control device described with reference to Figures 1 to 5 of the drawings. It should however be stressed that the fluid control device described with reference to Figures 6 and 7 could easily perform the same function.
  • the second stage comprises a spool valve element 41 located in an elongate chamber 42 having a respective end 43 or 44 in communication with each of the ducts 33 and 34 by way of ducts 45 and 46, so that the position of the spool valve element within the chamber is controlled by the relative fluid pressures within the ducts 33 and 34.
  • a feedback wire 40 is secured to the underside of the pivotable member 8 and engages within an annular recess 47 in the spool valve element 41.
  • the spool valve element 41 incorporates two annular recesses 48 and 49 in communication with two service ports 50 and 51 for connection, for example, to opposite sides of a hydraulically actuated piston (not shown).
  • An inlet port 52 is provided for connection to a source (not shown) of hydraulic fluid under pressure, and two return ports 53 and 54 are provided for connection to a reservoir (not shown).
  • Hydraulic fluid supplied to the inlet port 52 passes into a duct 55 having branches 56 and 57 connectable to the recesses 48 and 49 in the spool valve element 41.
  • a small proportion of the hydraulic fluid supplied passes by way of a duct 58 incorporating a restriction 59 to the duct 26 extending along the pivot axis of the pivotable member 8.
  • the spool valve element 41 may be actuated by an electrical control signal with a particularly rapid response time. Also the gaps between the fluid jet nozzles 29 and 30 in the pivotable member 8 and the fluid receiving orifice 37 and 38 in this construction are substantial by comparison with the diameter of the nozzles 29 and 30.
  • the chamber surrounding the pivotable member 8 is maintained at a low pressure relative to the pressure of the jets by virtue of the fact that the chamber is in fluid communication with the return ports 53 and 54 by way of a duct 60 accommodating the feedback wire 40.
  • the feedback wire is replaced by two springs provided at opposite ends of the spool valve element and acting to centre the spool valve element.
  • pivot axis is disposed equidistant from the two ends of the pivotable member, it should be appreciated that the pivot axis may in other embodiments be provided at different points along the pivotable member.
  • the device may include only a single fluid jet nozzle, and the pivot axis may be provided at one end of the pivotable member which will in that case be of cantilever type.
  • One or more receiving orifices may be provided in this single fluid jet nozzle arrangement. Multiple fluid jet nozzle arrangements are also feasible.
  • nozzles and orifices may be such that a shaped relationship between current input to the device to flow output can be generated.
  • the fluid jet nozzles may be formed by nozzle insets introduced into the ends of the ducts in the pivotable member.
  • the receiving orifices may be similarly formed by insets introduced into the ends of the ducts in the receiving member.
  • the ducts in the pivotable member may be formed in the portion made of substantially non-magnetizable material or may even be formed by separate pipes attached to the lower surface of the pivotable member.
  • the ducts may be formed by a laminated construction, for example, by an upper laminate having suitable grooves in its lower surface and a lower laminate having a flat upper surface which is bonded to the lower surface of the upper laminate, or by a three-layer arrangement having an upper laminate with a flat lower surface, a lower laminate with a flat upper surface and an intermediate laminated formed by profiled segments defining the ducts therebetween.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Servomotors (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (9)

  1. Dispositif de réglage à fluide comprenant un élément pivotable (8) ayant une surface majeure plane et étant monté de sorte à pouvoir pivoter autour d'un axe (11) parallèle à la surface majeure, l'élément pivotable (8) comprenant un canal à jet de fluide (29,30;61) qui dirige un jet de fluide parallèlement à la surface majeure et transversalement à l'axe de pivotement (11) vers une position éloignée de l'axe de pivotement (11), un élément récepteur (7) définissant un canal récepteur de fluide (37,38;63) qui est placé de sorte à recevoir le jet de fluide, et un moyen moteur (14) fonctionnant pour tourner l'élément pivotable (8) autour de l'axe de pivotement (11) de sorte à altérer la position du canal à jet de fluide (29,30;61) par rapport au canal récepteur de fluide (37,38;63) et pour ainsi varier la quantité de fluide reçue par le canal récepteur de fluide, l'élément pivotable (8) et l'élément récepteur (7) étant des parties intégrales d'un élément (3) en forme de feuille et étant formés par des découpures (5,6) dans l'élément de sorte que l'élément pivotable (8) se trouve dans l'élément récepteur (7) dans le plan de l'élément et est connecté de telle façon à l'élément récepteur (7) de façon à pouvoir pivoter par rapport à l'élément récepteur (7) autour de l'axe de pivotement (11) qui s'étend dans le plan de l'élément (3).
  2. Dispositif de commande à fluide selon la revendication 1, caractérisé en ce que l'élément pivotable (8) comprend une couche (12) d'une matière substantiellement non magnétisable dans laquelle s'étendent le canal à jet de fluide (29,30;61) et une couche (13) d'une matière magnétisable et que le moyen moteur est un moyen électromagnétique (14) pour réagir magnétiquement avec la couche (13) en matière magnétisable.
  3. Dispositif de commande à fluide selon la revendication 2, caractérisé en ce que le moyen électromagnétique (14) comprend des faces polaires (20,21) disposées adjacentes aux extrémités de l'élément pivotable (8) sur des côtés opposés de l'axe de pivotement (11) et parallèles au plan de l'élément (3).
  4. Dispositif de commande à fluide selon la revendication 1, 2 ou 3, caractérisé en ce que le canal à jet de fluide (29,30) comprend une buse qui est incorporée dans l'élément pivotable (8).
  5. Dispositif de commande à fluide selon la revendication 1, 2 ou 3, caractérisé en ce que le canal à jet de fluide (61) est un déflecteur qui redirige un jet de fluide d'une buse fixe (62) vers le canal récepteur de fluide (63).
  6. Dispositif de commande à fluide selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément pivotable (8) comprend deux canaux à jet de fluide (29,30;61) en deux positions éloignées de l'axe de pivotement (11) et sur des côtés opposés de cet axe, lesdits canaux dirigeant des jets de fluide parallèles à la surface majeure et transversalement à l'axe de pivotement en des directions opposées, et le moyen récepteur (7) définit deux canaux récepteurs de fluide (37,38;63) dont chacun est positionné opposé à l'un des canaux à jet de fluide (29,30;61) respectif pour recevoir le fluide de celui-ci.
  7. Dispositif de commande à fluide selon l'une quelconque des revendications précédentes, caractérisé en ce que le canal à jet de fluide (61) et le canal récepteur de fluide (63) ont une section en forme de U.
  8. Dispositif de commande à fluide selon la revendication 7, caractérisé en ce que les sections en forme de U sont opposées l'une à l'autre.
  9. Dispositif de commande à fluide selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément (3) en forme de feuille duquel l'élément pivotable (8) et le moyen récepteur (7) sont des parties intégrales, est formé d'une matière qui est suffisamment flexible pour permettre un pivotement limité de l'élément pivotable (8) par rapport à l'élément récepteur (7) par le moyen moteur (14), mais a une rigidité suffisante contre la torsion pour résister à un tel pivotement.
EP19870307773 1986-09-06 1987-09-03 Dispositif de réglage du débit Expired EP0260065B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8621532 1986-09-06
GB868621532A GB8621532D0 (en) 1986-09-06 1986-09-06 Fluid control devices

Publications (3)

Publication Number Publication Date
EP0260065A2 EP0260065A2 (fr) 1988-03-16
EP0260065A3 EP0260065A3 (en) 1989-02-22
EP0260065B1 true EP0260065B1 (fr) 1991-11-13

Family

ID=10603809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870307773 Expired EP0260065B1 (fr) 1986-09-06 1987-09-03 Dispositif de réglage du débit

Country Status (4)

Country Link
EP (1) EP0260065B1 (fr)
JP (1) JPS6383406A (fr)
DE (1) DE3774515D1 (fr)
GB (1) GB8621532D0 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031653A (en) * 1990-07-12 1991-07-16 Hr Textron Inc. Differential cylinder pressure gain compensation for single stage servovalve
DE4309695A1 (de) 1993-03-25 1994-09-29 Festo Kg Steuereinrichtung für ein Mehrwegeventil
DE202006006825U1 (de) 2006-04-27 2007-08-30 Bürkert Werke GmbH & Co. KG Ventil mit einem elektromagnetischen Antrieb
FR3024505B1 (fr) * 2014-07-31 2016-08-05 Zodiac Hydraulics Servovalve a ensemble mobile double

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849013A (en) * 1956-07-27 1958-08-26 Askania Regulator Co Multiple jet pipe relay regulator
US3137309A (en) * 1962-04-30 1964-06-16 Link Division General Prec Inc Frictionless zero spring rate seal
US3272077A (en) * 1963-12-23 1966-09-13 Pneumo Dynamics Corp Hydraulic servo valve
GB1206430A (en) * 1966-10-31 1970-09-23 Weston Hydraulics Ltd Electro-hydraulic servo valve
US3457955A (en) * 1967-01-03 1969-07-29 Garrett Corp Aerodynamically balanced valve
US3612103A (en) * 1969-07-01 1971-10-12 Moog Inc Deflectable free jetstream-type two-stage servo valve
US3678951A (en) * 1970-06-15 1972-07-25 Abex Corp Method and apparatus for improved jet pipe valve
US3765437A (en) * 1971-03-31 1973-10-16 Renault Hydraulic free-jet servo-valves

Also Published As

Publication number Publication date
EP0260065A2 (fr) 1988-03-16
DE3774515D1 (de) 1991-12-19
JPS6383406A (ja) 1988-04-14
EP0260065A3 (en) 1989-02-22
GB8621532D0 (en) 1986-10-15

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