EP0801232A1 - Hydraulisches Steuerventil für Servosteuerung eines Luftfahrzeugs, insbesondere Hubschraubers - Google Patents

Hydraulisches Steuerventil für Servosteuerung eines Luftfahrzeugs, insbesondere Hubschraubers Download PDF

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Publication number
EP0801232A1
EP0801232A1 EP97400648A EP97400648A EP0801232A1 EP 0801232 A1 EP0801232 A1 EP 0801232A1 EP 97400648 A EP97400648 A EP 97400648A EP 97400648 A EP97400648 A EP 97400648A EP 0801232 A1 EP0801232 A1 EP 0801232A1
Authority
EP
European Patent Office
Prior art keywords
plug
annular element
rotation
balls
locking
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Withdrawn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
EP97400648A
Other languages
English (en)
French (fr)
Inventor
Gérard Devaud
Arnaud Libault De La Chevasnerie
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.)
Societe dApplications des Machines Motrices SAMM SA
Original Assignee
Societe dApplications des Machines Motrices SAMM 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 Societe dApplications des Machines Motrices SAMM SA filed Critical Societe dApplications des Machines Motrices SAMM SA
Publication of EP0801232A1 publication Critical patent/EP0801232A1/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Withdrawn legal-status Critical Current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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8225—Position or extent of motion indicator
    • Y10T137/8242—Electrical
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86638—Rotary valve
    • Y10T137/86646—Plug type

Definitions

  • the present invention relates to a hydraulic distributor intended in particular to equip servos for helicopters and airplanes.
  • French patent 2,460,435 (79 17,184, EP-A 0 021 977, US-A 4 335 745) describes a hydraulic distributor comprising a plug mounted rotatably in a fixed fur housed in a body with the interposition of an annular element between bushel and fur. Bores are provided radially in the fur and in the annular element in the extension of each other, for the entry under pressure and the outlet to the tank of a hydraulic fluid. Passages are provided on the periphery of the annular element to allow the circulation of the fluid from one bore to the other in the event of jamming of the plug in said annular element. Means are provided for locking in rotation, in normal service, the annular element and for allowing the drive of said element in rotation by the plug in the event of jamming of the latter in the annular element.
  • this dispenser has all the desired operational safety.
  • the device for holding the fixed annular element during normal operation of the dispenser and for releasing it in rotation in the event of jamming of the plug comprises, in this anterior dispenser, balls partially engaged in notches formed on one end of the annular element, and which are kept applied in these notches, by means of a plate, by a balance articulated on the body.
  • the end of this balance opposite to the balls is urged by a push device arranged laterally to the body of the distributor and parallel to the plug, this push being permanently urged by a spring so as to exert on the balance a holding torque of the balls in their notches.
  • the pusher cooperates with an electric contactor connected to an alarm lamp, which can be lit when the balls push the balance against the action of the return spring following a rotation of the annular element, in the event of seizure bushel in the latter.
  • Such a locking device is relatively bulky considering the space available at the location of the distributor, in a helicopter or an airplane.
  • the means for locking the annular element in rotation in normal service comprises a push device mounted laterally on the body at one end of the plug and directed perpendicularly to the latter, and this device is provided with elastic means. urging the pusher against a rocker inside the body and the thrust of which applies to locking balls projecting from notches formed in one end of the annular element.
  • Such a device is significantly less bulky than the device of the aforementioned French patent.
  • the invention also aims to provide a distributor equipped with a system for detecting the angular position of the rotary plug, which is compact.
  • the distributor is equipped with at least one inductive detector of the angular position of the rotary plug, comprising a movable core, one end of which is articulated on an arm extending radially to the plug and integral with the latter in rotation, the core being housed in induction windings.
  • the distributor is equipped with two linear inductive sensors, coupled to one another and arranged on either side of the push-button locking system, so that when one of the two cores enters the 'corresponding winding, the second core leaves the associated winding.
  • Figure 1 is an axial sectional view of an embodiment of the hydraulic distributor according to the invention.
  • Figure 2 is a simplified top view of the dispenser of Figure 1 showing the locking device in rotation of the annular element and two inductive sensors of the angular position of the plug, placed on each side of the locking device.
  • FIG. 3 is a side elevation view along the arrow K in FIG. 1.
  • FIG. 4 is a half-sectional mid-elevation view on an enlarged scale with respect to FIG. 3, of an inductive detector of the angular position of the plug.
  • FIG. 5 is a sectional view of the distributor along 5-5 of FIG. 1.
  • the hydraulic distributor shown in the drawings is intended to be part of a hydraulic servo-control device, usable in particular on airplanes or helicopters, of the type described in French patent 2,460,435, the description of which will therefore not be repeated here. .
  • the dispenser comprises a central plug 1 arranged for its greater part inside a body 2 and one end of which protrudes 3 and is adapted to be secured with a control lever as described in the aforementioned French patent.
  • the plug 1 is disposed axially in an annular element forming a liner 4 itself housed coaxially in a concentric sleeve 5 fixed to the body 2 by means of an annular part 6.
  • the fur 5 and the annular part 6 are pierced with two pairs of bores 7, 8 respectively arranged radially and distributed over the periphery of these parts.
  • radial bores 9 are also formed in the annular element 4.
  • bores 7, 8, 9 are part of a hydraulic circuit allowing the entry under pressure and the outlet to the tank of a hydraulic fluid, passages being provided on the periphery of the annular element 4 to allow the circulation of the fluid from one bore to the other in the event of seizure of the plug 1 in the jacket 4.
  • the entire hydraulic circuit of this distributor is described in detail in French patent 2,460,435.
  • the annular element 4 and the plug 1 are mounted, at one of their ends, on ball bearings 11 placed in abutment on shoulders inside the body 2.
  • the means for locking in rotation of the annular element 4, in normal service of the dispenser, comprise a device 12 with pusher 13 mounted laterally on the body 2, at one end of the plug 1, the pusher 13 being directed perpendicularly to the latter.
  • the device 12 comprises a housing 14 containing a helical spring 15 bearing on an annular shoulder 16 of the housing 14 and the opposite end of which exerts an axial thrust on a bell 17 integral with a rod constituting the axial pusher 13.
  • the housing 14 is partially engaged in a corresponding recess in body 2.
  • the end of the pusher 13 requests a rocker lever 30 inside the body, articulated on an axis 18 mounted on the body 2 transversely to the pusher 13.
  • the rocker 30 has two legs 30a forming a fork which surrounds the end of the plug 1.
  • the lugs 30a thus exert on a washer 19 coaxial with the plug 1 a push having an axial component on the plug 1.
  • This push is applied on several balls 21 distributed around the periphery of the end of the annular element 4.
  • An eccentric 45 is mounted on the body 2 substantially at the level of the balls 21 and transversely to the plug 1. This eccentric 45 is used, in a manner known per se, for adjusting the hydraulic zero of the plug 1 via the liner 4.
  • the balls 21, preferably arranged at equal angular intervals around the plug 1, are engaged in corresponding diametric openings 22 arranged in a plate 23 inside the body 2, extending perpendicular to the plug 1, which passes through it through a corresponding central opening .
  • the balls 21 are also partially pressed into notches 24, preferably with a V-shaped profile, formed in the end face of the jacket 4.
  • the locking device which has just been described is notably less bulky than that of the aforementioned French patent, thanks to its arrangement lateral to the plug 1.
  • the bell 17 has its translational travel limited by the bottom 10 of the housing 14 fitted into the body 2.
  • the distributor is also equipped with at least one inductive detector 25 for the angular position of the rotary plug 1, which makes it possible to control the position of the latter.
  • the distributor thus comprises two detectors 25, arranged on either side of the locking device 12 of the rotating sleeve 4 (FIG. 2), these two detectors 25 being coupled one to the other. 'other.
  • Each detector 25 is of the linear type, comprising inductive windings 26, the outlet 46 of which can be seen (FIG. 4), arranged in a housing 27 suitably fixed on the body 2 and provided with an axial core 28, displaceable in translation axial inside the windings 26.
  • Each core 28 is constituted by a tube of which a part 28 has protruded outside the housing 27, the end of this part 28 a being articulated by an axis 29 on an arm 31 extending radially to the plug 1 and integral in rotation with one end of the latter.
  • the two arms 31 are thus secured to the plug 1 and form an appropriate angle between them, defining a widely open V.
  • Each core 28 passes through the end of the corresponding housing 27 through an opening 32 substantially greater than the outside diameter of the core 28. This arrangement reserves for the latter a possibility of clearance. transverse in the housing 27, due to the rotations of its articulation on the associated arm 31 linked to the plug 1.
  • the hydraulic distributor targeted by the invention comprises a device for testing the proper functioning of the locking means 12 of the jacket 4.
  • This test device 33 (visible in FIG. 5) comprises a jack 34 housed in the body 2.
  • the cylinder 34 comprises a cylinder 35 containing a piston 36 provided with a rod 37 perpendicular to the axis of the plug 1, and which is constantly stressed by a helical spring 38 inside the cylinder 35.
  • the rod 37 is thus constantly applied against a lug radial 39 projecting from a collar 41 mounted at the end of the annular element 4 where the locking balls 21 are mounted, and secured in rotation with the jacket 4 by a radial pin 42.
  • the jack 34 is positioned in a cylindrical chamber 43 communicating with the hydraulic supply circuit.
  • this test cylinder device 34 makes it possible to verify that the locking device 12 of the jacket 4 in its normal position allows the rotation of this jacket when a sufficient torque is exerted on it, in the absence of pressurization of the hydraulic chamber 43.
  • the size of the cylinder test device 34 of the distributor according to the invention is much smaller than that of the distributor of the aforementioned patent.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)
EP97400648A 1996-04-03 1997-03-21 Hydraulisches Steuerventil für Servosteuerung eines Luftfahrzeugs, insbesondere Hubschraubers Withdrawn EP0801232A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9604197A FR2747174B1 (fr) 1996-04-03 1996-04-03 Distributeur hydraulique pour servocommandes d'aeronefs, notamment helicopteres
FR9604197 1996-04-03

Publications (1)

Publication Number Publication Date
EP0801232A1 true EP0801232A1 (de) 1997-10-15

Family

ID=9490878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400648A Withdrawn EP0801232A1 (de) 1996-04-03 1997-03-21 Hydraulisches Steuerventil für Servosteuerung eines Luftfahrzeugs, insbesondere Hubschraubers

Country Status (3)

Country Link
US (1) US5899226A (de)
EP (1) EP0801232A1 (de)
FR (1) FR2747174B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19926429A1 (de) * 1999-06-10 2000-12-14 Zf Luftfahrttechnik Gmbh Einrichtung zum gleichzeitigen Verriegeln mehrerer Aktuatoren

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786244B1 (fr) 1998-11-24 2001-01-26 Snecma Vanne de carburant a commande directe pour circuit d'injection de debit carburant
FR2916492B1 (fr) * 2007-05-24 2009-07-17 Eurocopter France Distributeur hydraulique muni d'un dispositif de detection de grippage.
US20140261778A1 (en) * 2013-03-14 2014-09-18 Pentair Valves & Controls UK Limited High Integrity Pressure Protection System (HIPPS) Manifold System and Method
GB2522744B (en) * 2014-11-14 2016-03-16 Blagdon Actuation Res Ltd Servo actuators

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2004355A1 (de) * 1968-03-20 1969-11-21 Bishop Arthur
FR2099895A5 (de) * 1970-06-25 1972-03-17 Trw Inc
FR2352972A2 (fr) * 1976-05-25 1977-12-23 Fairey Hydraulics Perfectionnements aux servo-mecanismes hydrauliques
FR2460435A1 (fr) * 1979-07-03 1981-01-23 Applic Mach Motrices Distributeur hydraulique, destine notamment a equiper des servo-commandes d'avions et d'helicopteres

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482486A (en) * 1967-11-29 1969-12-09 United Aircraft Corp Redundant control method and apparatus
US3529514A (en) * 1969-03-25 1970-09-22 United Aircraft Corp Redundant servomechanism with bypass provisions
US3850196A (en) * 1973-11-05 1974-11-26 Gen Motors Corp Metering rod with position indicating means
FR2549167B1 (fr) * 1983-07-13 1988-01-29 Applic Mach Motrices Distributeur hydraulique destine a equiper une commande d'aeronef
US4619288A (en) * 1985-11-06 1986-10-28 Pneumo Corporation Adjustable transducer and lock mechanism for monitoring valve position
FR2594515B1 (fr) * 1986-02-19 1988-05-06 Snecma Dispositif de transmission a deux degres de liberte en entree et un seul en sortie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2004355A1 (de) * 1968-03-20 1969-11-21 Bishop Arthur
FR2099895A5 (de) * 1970-06-25 1972-03-17 Trw Inc
FR2352972A2 (fr) * 1976-05-25 1977-12-23 Fairey Hydraulics Perfectionnements aux servo-mecanismes hydrauliques
FR2460435A1 (fr) * 1979-07-03 1981-01-23 Applic Mach Motrices Distributeur hydraulique, destine notamment a equiper des servo-commandes d'avions et d'helicopteres

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19926429A1 (de) * 1999-06-10 2000-12-14 Zf Luftfahrttechnik Gmbh Einrichtung zum gleichzeitigen Verriegeln mehrerer Aktuatoren
US6676377B1 (en) 1999-06-10 2004-01-13 Zf Luftfahrttechnik Gmbh Device for simultaneously interlocking a plurality of actuators

Also Published As

Publication number Publication date
FR2747174B1 (fr) 1998-07-10
FR2747174A1 (fr) 1997-10-10
US5899226A (en) 1999-05-04

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