EP0006045B1 - Steuervorrichtung für einen hydraulischen Kreislauf und autonomer Stellmotor, in dem dieser Kreislauf integriert ist - Google Patents

Steuervorrichtung für einen hydraulischen Kreislauf und autonomer Stellmotor, in dem dieser Kreislauf integriert ist Download PDF

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Publication number
EP0006045B1
EP0006045B1 EP79400311A EP79400311A EP0006045B1 EP 0006045 B1 EP0006045 B1 EP 0006045B1 EP 79400311 A EP79400311 A EP 79400311A EP 79400311 A EP79400311 A EP 79400311A EP 0006045 B1 EP0006045 B1 EP 0006045B1
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EP
European Patent Office
Prior art keywords
cylinder structure
base
pump
stage
valve
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
EP79400311A
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English (en)
French (fr)
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EP0006045A1 (de
Inventor
Jacques Benilan
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.)
Les Applications Hydrauliques R Sarrazin Sa Dite Ste
Original Assignee
Les Applications Hydrauliques R Sarrazin Sa Dite Ste
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Publication date
Application filed by Les Applications Hydrauliques R Sarrazin Sa Dite Ste filed Critical Les Applications Hydrauliques R Sarrazin Sa Dite Ste
Priority to AT79400311T priority Critical patent/ATE388T1/de
Publication of EP0006045A1 publication Critical patent/EP0006045A1/de
Application granted granted Critical
Publication of EP0006045B1 publication Critical patent/EP0006045B1/de
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
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/202—Externally-operated valves mounted in or on the actuator
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/18—Combined units comprising both motor and pump
    • 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
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2544—Supply and exhaust type
    • Y10T137/2554—Reversing or 4-way valve systems
    • 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
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2605—Pressure responsive
    • Y10T137/2617—Bypass or relief valve biased open
    • 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
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2605—Pressure responsive
    • Y10T137/2635—Pilot valve operated

Definitions

  • the present invention relates to fluid control devices and in particular those used to carry out the control of so-called “autonomous" jacks, that is to say double acting linear jacks equipped with their own pumping group constituted by a motor and a pump.
  • such equipment comprises, in addition to the motor and the pump, a control unit which is housed in a tank and whose access is therefore difficult, which in particular does not allow adjustments to be made. when the device is in use.
  • certain components are presented independently, in the form of “cartridges and are incorporated into the circuit while being accessible from the outside. These are, however, components which generally fulfill only one function so that, whatever the configuration, the result is a unit which is bulky and of a relatively high cost price.
  • a piloted balancing valve and a non-return valve are combined in the same sub-assembly in a single body.
  • a balancing valve offers well-known drawbacks, and in particular of not allowing speed adjustment, there is no such sub-assembly in the function of controlling the nominal pressure in the circuit.
  • US-A-2 449 482 (Hufferd) describes an autonomous cylinder whose incorporated control device comprises two adjacent assemblies, which operate in combination and which do not allow braking on the fluid return circuit.
  • an indirect control is carried out, from one control assembly to another, which is not very efficient and complicated.
  • the object of this invention is therefore to provide a control device for a fluid circuit, which fulfills several functions, which is compact, economical and allows cartridge mounting. In addition, such a device must be able to easily make the necessary adjustments.
  • the subject of the invention is a control device for a fluid circuit, comprising a body delimiting a housing which passes right through it and in which two subassemblies are arranged coaxially, one of which constitutes a check valve. restraint and braking of a fluid flow, characterized in that the two sub-assemblies respectively constitute a first pressure limiting stage and a second stage forming a check and braking valve and a piloting device is provided arranged in said housing between the pressure limiter stage and the stage forming a check and braking valve, this device acting on the valve shutter and being subjected to the pressure established by the limiter.
  • such a device is associated with a jack, the chamber delimited between the pressure limiting stage and the pilot piston being connected to a source of pressurized fluid and to a first working chamber of this jack, a second of which chamber is connected to the second retaining and braking stage.
  • the invention also relates to an autonomous cylinder comprising a motor, a body forming a reservoir for the fluid, a pump driven by the motor and associated with a control device, and a base on which is fixed a set of cylinder and rod.
  • cylinder characterized in that it comprises two integrated control devices as defined above, incorporated in the base and suitably connected, on the one hand, to the pump and, on the other hand, to the two cylinder working chambers.
  • the pressure relief stage comprises a first insert 10, fixed in the body by screwing, which is hollowed out and has a bottom 11 and a side wall 12.
  • a shutter 14 which, in the example chosen, has a conical shape.
  • This shutter is held in the closed position by a spring 15 bearing against the bottom 16 of a part 17 which is itself screwed in an adjustable manner in the first insert 10.
  • This screw 17 also comprises a skirt 18 received with a tight seal in the insert 10. At its upper part, the latter is closed by a plug 19. It also has a circumferential groove 20 communicating by one or more passages 21 with its internal recess and with a conduit 5 for covering, pierced in the body 1. Seals 22, 23 are provided between this insert and the adjacent wall of the body.
  • the body 1 receives seal around sealing a second insert 30 which may simply be held by the part 10 in abutment against a radial shoulder 8 of the body 3 or may be screwed into the body.
  • This second part is also hollowed out and has a bottom 31 and a side wall 32 which guides a piston 33, the bottom of which directly faces the bottom 11 of the part 10.
  • the latter comprises on its outer face a crosspiece 24 or any other equivalent means. This interval constitutes a chamber 25.
  • the bottom of the second insert is pierced with an orifice 34 and constitutes a seat for a ball 40 of a check valve.
  • the orifice 34 also allows the passage of a pusher 35 integral with the piston 33 or bearing against the bottom of the latter is urged upward looking towards the drawing by a spring 36 itself bearing against the bottom 31 of the part 30.
  • the internal volume of the latter communicates with the volume delimited by the adjacent part of the body by at least one orifice 37.
  • This part of the body is also also connected to the cover by a conduit 6.
  • the end of the pusher 35 adjacent to the check valve 40 has a profile of variable section so as to be able to delimit with the bottom of the part 30 a passage whose free section varies as a function of the axial position of the pusher; the latter may for this purpose have any suitable shape and comprise for example oblique slots 38.
  • a lining 39 is also provided between the bottom 31 and a radial shoulder 3 b of the body 1.
  • the body delimits a stepped bore of smaller section comprising in an intermediate part a radial shoulder 4a on which is supported a spring 41 which acts on the ball 40 to apply it against its seat.
  • the chamber delimited by the body between this shoulder and the second insert is connected to a conduit 7 for the return of fluid.
  • an abutment finger 42 which determines the displacement stroke of the check valve 40 under the action of the pusher 35, the position of this abutment being determined by an adjustment screw 43 comprising a seal. sealing 44.
  • the lower part (in the drawing) of the bore formed in the body is also closed by a tight plug 45.
  • the chamber 25 is connected by a conduit 8, on the one hand, to a source of pressurized fluid (pump 50 in FIG. 2) and, on the other hand, by means of a non-return valve 51 to a working chamber 52 of a jack 53.
  • the duct 7 is assumed to be connected to the second chamber 54 of the jack and therefore receives fluid from this second chamber.
  • the conduits 5 and 6 as well as a pump suction conduit 55, associated with two non-return valves 56, 57 are connected to a fluid reservoir 58.
  • the pump 50 is in two directions of rotation and it is understood that the diagram can be completed to achieve a double-acting control of the jack 53, by a second circuit equivalent to that shown and ensuring the supply of the chamber 54 (from the conduit 59) and the braking of the fluid coming from the chamber 52.
  • the part 30 being blocked in the body 1, and the spider 24 or equivalent means having a radial size such that it does not interfere with this part 30, it is possible, by screwing the part 10 into the body, positively hold the ball 40 away from its seat, which can be particularly advantageous for example to obtain free movement of the associated jack.
  • FIG. 3 There is shown schematically in FIG. 3 a so-called autonomous cylinder, that is to say comprising a motor and a pump incorporated, comprising two control devices according to the invention arranged in the same body which is here constituted by a base 100. These two devices are designated by the references 101 and 102 and one sees on the drawing only the plugs which correspond to the plug 19 in FIG. 1.
  • this base are also provided two housings 103, 104 for pins of axis Y-Y perpendicular to the axis Z-Z of the jack.
  • the latter comprises an electric motor 105, a pump 106 associated with a block of valves 107 which corresponds to the valves 56, 57 in FIG. 2.
  • This pump is surrounded by a cylindrical body 108 and the assembly of the motor, the pump and the body 108 is fixed to the base 10G by means of tie rods 109 or other equivalent fixing members.
  • a drive link is also provided between the output shaft 110 of the motor and the pump.
  • a cylinder assembly proper consisting of a cylinder 111 in which is received a piston 112 secured to a rod 113, the piston and the cylinder defining two chambers 114 and 115.
  • the cylinder 111 is received in a bore 116 of an axial extension 117 of the base. It is also received in a bore 118 of a flange 119 which carries a ring 120 for guiding the rod 113.
  • This assembly is completed by a cylindrical body 121 which is made integral, on the one hand, with the extension 117 of the base and, on the other hand, the flange 119 by means of two elastic rods 122, 123 received in the circumferential grooves of these different parts.
  • the suction of the pump takes place in the part of the reservoir delimited by the body 108, for example, by conduits 127, 128 converging at a point 129 which is as close as possible to the point of intersection between the two axes YY and ZZ.
  • This ensures good circulation of the fluid, improving its cooling, and a correct supply of the pump whatever the variations in position of the jack, thus making the presence of compensators unnecessary in the majority of cases.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Braking Arrangements (AREA)
  • Regulating Braking Force (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Claims (17)

1. Steuervorrichtung für eine Fluidschaltung mit einem Körper (1), der ein Aufnahmeteil (2, 3, 4) abgrenzt, das den Körper vollständig durchsetzt und in dem koaxial zwei Unterbaugruppen angeordnet sind, von denen eine eine Rückschlag- und Bremsklappe für eine Fluidströmung bildet, dadurch gekennzeichnet, daß die beiden Unterbaugruppen jeweils eine erste Stufe zur Druckbegrenzung und eine zweite Stufe bilden, die die Rückschlag- und Bremsklappe bildet, und daß eine Steuervorrichtung (33, 34, 36) vorgesehen ist, die in diesem Aufnahmeteil (3) zwischen der Stufe zur Druckbegrenzung und der die Rückschlag- und Bremsklappe bildenden Stufe angeordnet ist, wobei diese Vorrichtung auf das Absperrorgan (40) der Klappe einwirkt und dem durch den Begrenzer aufgebauten Druck ausgesetzt ist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die beiden vorgenannten Stufen Regeleinrichtungen (17, 43) aufweisen, die von außerhalb des Körpers zugänglich sind.
3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß der im Körper abgegrenzte Aufnahmeteil einen ersten Abschnitt (2) aufweist, in dem ein erstes angesetztes Teil (10) befestigt ist, das einen Sitz (11) für ein Absperrorgan (14) begrenzt, daß dieses angesetzte Teil derart ausgespart ist, daß es das Absperrorgan (14), eine Wiegefeder (15) und ein Organ (17) aufnimmt, das für diese Feder eine Auflagefläche bildet, daß das Innenvolumen dieses angesetzten Teils (10) mit einer Kammer des Körpers in Verbindung steht, die an dem Behälter angebracht ist, und daß Mittel zur Regelung der axialen Position des Organs (17) vorgesehen sind, die die Position dieser Auflagefläche für die Feder Bestimmen.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die in dem Körper begrenzte Aufnahme einen zweiten Abschnitt aufweist, der ein zweites angesetztes Teil (30) aufnimmt, das eine Führungsfläche für einen Steuerkolben (33), eine Auflagefläche für eine Rückstellfeder des Kolbens und einen Sitz (31) für ein' Absperrorgan (40) der zweiten Stufe (4) der Vorrichtung begrenzt.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Boden des Steuerkolbens (33) direkt dem Boden (11) des ersten angesetzten Teils (10) gegenüberliegt und daß Mittel (24) vorgesehen sind, die den Kolben in einem Abstand von dem ersten angesetzten Teil (10) halten.
6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Innenvolumen des zweiten angesetzten Teils (30) über eine Öffnung (37) mit dem benachbarten Teil (3) des Körpers und über eine Leitung (6) mit dem Behälter in Verbindung steht.
7. Vorrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß das im Körper abgegrenzte Teil einen dritten Abschnitt (4) aufweist, der durch die Rückschlagklappe abgeteilt ist und über eine Leitung (7) mit einer Fluidrückführung verbunden ist.
8. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Weg des Absperrorgans für die zweite Stufe wie an sich bekannt durch ein Anschlagorgan (42) begrenzt ist, das von außerhalb des Körpers verstellbar ist.
9. Vorrichtung nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, daß der Steuerkolben (33) wie an sich bekannt ein Stück mit einer Stange (35) bildet, die derart angeordnet ist, daß sie einerseits als Druckstück dient, um das Absperrorgan (40) der zweiten Stufe von seinem Sitz abzurücken, und daß sie andererseits mit dem zweiten angesetzten Teil (30) zusammenarbeitet, um eine Drosselung des variablen Querschnitts für den Fluiddurchgang zu begrenzen.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Weg des Absperrorgans (40) der Rückschlag- und Bremsklappe derart beschaffen ist, daß sich in einem ersten Zeitraum ein für das Fluid praktisch freier Durchgang vor der durch das Druckstück (35) bestimmten Drosselung bildet.
11. Selbständiger Zylinder mit einem Motor (105), einem Körper (108), der einen Vorrat für das Fluid bildet, einer Pumpe (106), die von dem Motor angetrieben wird, und mit einer Steuervorrichtung (107) verbunden ist und mit einer Grundplatte (100), auf der eine Anordnung aus einem Zylinder (111) und einer Zylinderstange (112, 113) befestigt ist, dadurch gekennzeichnet, daß er zwei Steuervorrichtungen (101, 102) nach einem der vorhergehenden Ansprüche aufweist, die in die Grundplatte (100) eingebaut und mit dieser befestigt sind und die auf geeignete Weise einerseits mit der Pumpe (106) und andererseits mit den beiden Arbeitskammern (114, 115) des Zylinders verbunden sind.
12. Zylinder nach Anspruch 11, dadurch gekennzeichnet, daß der den Behälter bildende Körper zwei Abschnitte (108, 121) aufweist, die beidseitig der Grundplatte (100) angeordnet sind und mit in dieser Grundplatte ausgebildeten Durchgängen in Verbindung stehen, wobei einer der Abschnitte wie an sich bekannt die Pumpe umgibt, während der andere die vorstehend genannte Zylinderanordnung (111, 112, 113) umgibt.
13. Zylinder nach einem der Ansprüche 11 und 12, dadurch gekennzeichnet, daß der zweite Abschnitt (121) des Körpers und die Zylinderanordnung auf einer axialen Verlängerung (117) der Grundplatte angebracht und auf dieser Grundplatte mit Hilfe wenigstens eines elastischen Rings (122) befestigt sind.
14. Zylinder nach Anspruch 13, dadurch gekennzeichnet, daß eine Backe (119) zwischen dem Zylinder (111) und dem Körper (121) vorgesehen ist und daß der letztgenannte mittels eines elastischen Rings (123) an dieser Backe befestigt ist.
15. Zylinder nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, daß der Motor (105), die Pumpe (106) und der erste Abschnitt (108) des Behälters auf der Grundplatte mit Hilfe von Zugbolzen (109) befestigt sind und daß die Pumpe und der Behälter zwischen einem Flansch des Motors und einer Fläche der Grundplatte festgeschraubt sind.
16. Zylinder nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, daß sich die Ansaugöffnung der Pumpe (106) in der Nähe der Längsachse (Z-Z) des Zylinders oder wenn diese schwingend um zwei Zapfen gelagert ist, in der Nähe des Schnittpunktes zwischen der Achse (Y-Y) dieser Zapfen und der Längsachse (Z-Z) des Zylinders befindet.
17. Zylinder nach Anspruch 12, dadurch gekennzeichnet, daß in den in der Grundplatte ausgebildeten Durchgängen ständige Filtereinrichtungen angeordnet sind.
EP79400311A 1978-06-01 1979-05-17 Steuervorrichtung für einen hydraulischen Kreislauf und autonomer Stellmotor, in dem dieser Kreislauf integriert ist Expired EP0006045B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79400311T ATE388T1 (de) 1978-06-01 1979-05-17 Steuervorrichtung fuer einen hydraulischen kreislauf und autonomer stellmotor, in dem dieser kreislauf integriert ist.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7816390A FR2427499A1 (fr) 1978-06-01 1978-06-01 Dispositif de commande integre pour circuit de fluide, et ses applications
FR7816390 1978-06-01

Publications (2)

Publication Number Publication Date
EP0006045A1 EP0006045A1 (de) 1979-12-12
EP0006045B1 true EP0006045B1 (de) 1981-11-11

Family

ID=9208947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400311A Expired EP0006045B1 (de) 1978-06-01 1979-05-17 Steuervorrichtung für einen hydraulischen Kreislauf und autonomer Stellmotor, in dem dieser Kreislauf integriert ist

Country Status (7)

Country Link
US (1) US4240255A (de)
EP (1) EP0006045B1 (de)
AT (1) ATE388T1 (de)
CA (1) CA1132440A (de)
DE (1) DE2961303D1 (de)
ES (1) ES481146A1 (de)
FR (1) FR2427499A1 (de)

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GB822165A (en) * 1958-09-15 1959-10-21 Electrol Inc Improvements relating to electro-hydraulic actuators
US3933167A (en) * 1974-02-20 1976-01-20 Tomco, Inc. Pilot operated check valve
CH595561A5 (de) * 1974-08-23 1978-02-15 Boschung Fa M
DE2445699A1 (de) * 1974-09-25 1976-04-08 Meier & Freimuth Ohg Hydraulisch entsperrbares rueckschlagventil
FR2325872A1 (fr) * 1975-01-09 1977-04-22 Villien Bernard Electro-vanne a cinq fonctions integrees pour equipement de circuits hydromecaniques a simple effet
DE2559029C2 (de) * 1975-12-29 1985-10-31 Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 8000 München Bremsventil
DE2707752A1 (de) * 1977-02-23 1978-08-31 Bosch Gmbh Robert Gehaeuse zur aufnahme eines druckbegrenzungsventils und eines druckschaltventils

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3231319A1 (de) * 1982-08-23 1984-02-23 Elektro-Mechanik Gmbh, 5963 Wenden Elektrohydraulische verstellvorrichtung

Also Published As

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ES481146A1 (es) 1980-10-01
ATE388T1 (de) 1981-11-15
FR2427499B1 (de) 1981-11-27
DE2961303D1 (en) 1982-01-14
EP0006045A1 (de) 1979-12-12
FR2427499A1 (fr) 1979-12-28
US4240255A (en) 1980-12-23
CA1132440A (en) 1982-09-28

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