EP0238368B1 - Speisesystem für Druckflüssigkeit - Google Patents

Speisesystem für Druckflüssigkeit Download PDF

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Publication number
EP0238368B1
EP0238368B1 EP87400216A EP87400216A EP0238368B1 EP 0238368 B1 EP0238368 B1 EP 0238368B1 EP 87400216 A EP87400216 A EP 87400216A EP 87400216 A EP87400216 A EP 87400216A EP 0238368 B1 EP0238368 B1 EP 0238368B1
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EP
European Patent Office
Prior art keywords
fluid
tank
feed system
distributor
pressurized
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
EP87400216A
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English (en)
French (fr)
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EP0238368A1 (de
Inventor
Michel Barousse
Jean-Pierre Parissenti
Roger Morvan
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.)
Airbus Group SAS
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Airbus Group SAS
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Filing date
Publication date
Application filed by Airbus Group SAS filed Critical Airbus Group SAS
Publication of EP0238368A1 publication Critical patent/EP0238368A1/de
Application granted granted Critical
Publication of EP0238368B1 publication Critical patent/EP0238368B1/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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • 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
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/2937—Gas pressure discharge of liquids feed traps [e.g., to boiler]
    • Y10T137/2947—Gas pressure controlled by amount of liquid in trap
    • Y10T137/2965—Float responsive
    • 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
    • Y10T137/85978—With pump
    • Y10T137/86131—Plural
    • Y10T137/86163—Parallel
    • 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
    • Y10T137/86187—Plural tanks or compartments connected for serial flow
    • Y10T137/86196—Separable with valved-connecting passage

Definitions

  • the present invention relates to a pressurized fluid supply system intended to be temporarily connected to a fluidic system supplying user devices.
  • such a fluidic system mainly consists of a fluid generator circuit and a fluid distributor circuit to which the user devices are connected.
  • aircraft comprise a fluidic system comprising a circuit for generating pressurized fluid and a circuit for distributing the fluid supplying user devices such as, for example, flight controls, the train of landing, braking devices, etc ...
  • the pressurized fluid generator circuit of one of the three systems comprises, in summary, at least one hydraulic pump connected to an engine of the aircraft by which the pump rotor is rotated.
  • the pump thus transmits the fluid, coming from a supply line, at a given pressure to the distributor circuit comprising the devices.
  • a fluid outlet pipe coming from the user devices is connected, through a filter, to a tarpaulin itself connected, by means of a pipe, to the fluid generating circuit.
  • the user devices are able to be requested by the pilot.
  • the first process consists, schematically, of supplying the distributor circuit of the aircraft directly from a ground supply system (US-A-3,748,898). It comprises a hydraulic pump connected on the one hand, upstream, to a hydraulic unit and on the other hand, downstream, to a console for controlling and regulating the pressurized fluid.
  • This console is connected to the distributor circuit of the aircraft and the return of the user devices takes place directly, through the circuit filter to a tank of the ground supply system, on which the pump is connected.
  • the tarpaulin of the aircraft in this process, is not connected and is isolated from the ground supply system due to the overpressures that it would be liable to possibly causing it to burst.
  • the second process consists, schematically, in connecting each distributor circuit of the aircraft to a park bench (US-A-3,418,843).
  • each sheet of the aircraft is connected to the entire circuit by being put under constant pressure during the time necessary for testing and checking the user devices.
  • This process overcomes some of the disadvantages of the first process, but nevertheless raises difficulties related to noise, congestion in particular of the work areas, and the costs of implementing this process.
  • a park bench is required for each circuit or fluid system of each aircraft.
  • the present invention aims to overcome the drawbacks mentioned above and relates to a pressurized fluid supply system temporarily replacing the pressurized fluid generator circuit, and allowing, from a hydraulic power plant on the ground to use the cover of the fluid distributor circuit by continuously modulating the volume of fluid contained in said cover by injecting an auxiliary volume.
  • the pressurized fluid supply system intended to be temporarily connected to a fluidic system consisting of a pressurized fluid generator circuit and a distributor circuit for said fluid, said distributor circuit comprising user devices, an output of which is connected to an input of a tank itself connected to the fluid generator circuit, said fluid generator circuit being intended to deliver the fluid under pressure to an input of said user devices, said supply system temporary being able to replace said fluid generating circuit, is remarkable in that it is capable of being connected on the one hand, by a supply line, to the input of said user devices and on the other hand, by a return line, at an outlet from said cover, and, in that it comprises auxiliary fluidic means, connected to said tank of said fluid distributor circuit, capable of delivering an annexed fluid under pressure into said tank, when the level of fluid contained in said tank reaches a predetermined threshold capable of being reached during the requesting said user devices, means for detecting said level of fluid arranged on said cover ensuring the actuation of said auxiliary fluid means.
  • the auxiliary fluid means comprise a pressure valve connected to a source of pressurized fluid through a filter, a fluid pressure gauge associated with said valve and a solenoid valve disposed on a pipe connecting an outlet of said valve to said cover of the pressurized fluid distributor circuit.
  • said detection means consist of a level detector connected to the electrodistributor of the auxiliary fluid means.
  • said level detector allows on the one hand, when the fluid level rises in said tank and reaches said threshold to switch said solenoid valve in an open position corresponding to the injection of annexed fluid under pressure into said tank and d on the other hand, when the level of fluid drops in said tank and goes back through said threshold, to tilt said solenoid valve in a closed position corresponding to the stop of injection of annexed fluid under pressure into said tank.
  • an electrical switch is advantageously located on the pipe of said auxiliary fluid means.
  • said detection means comprise an electrical contactor for the high level of fluid contained in said tank, preventing the supply of fluid to the user devices in the event of a rise in the level of the fluid in the tank beyond a value predetermined.
  • FIG. 2 represents a practical embodiment of the supply system associated with the fluidic system.
  • FIG. 3 represents the electrical circuit annexed to said supply system.
  • the fluidic system represented by FIG. 1 and intended for example for an aircraft consists of a first circuit 1 generator of pressurized fluid and a second circuit 2 distributor of said fluid.
  • a first circuit 1 generator of pressurized fluid for example, a first circuit 1 generator of pressurized fluid
  • a second circuit 2 distributor of said fluid for example, a second circuit 2 distributor of said fluid.
  • aircraft comprising, in general, three fluidic systems arranged in parallel.
  • the generator circuit 1 comprises a pump 3 of hydraulic type coupled to a turbine 4 of a motor 5 by means of a connection 6.
  • the pump 3 thus delivers, by a fluid line 7, the hydraulic fluid under pressure to an inlet 8 of the distributor circuit 2 constituted by user devices 9 or designated by technicians, services, such as, for example, flight controls and control surfaces, landing gear, braking members. All of these easements 9 represented by a rectangle, is connected by an outlet 10 to an inlet 11 of a tank 12 by means of a pipe 14, on which is placed a filter 15 of the fluid.
  • the tank 12, which contains a volume of hydraulic fluid is connected by an outlet 17 to the pump 3 of the generator circuit 1 by means of a fluid line 18.
  • the pump 3 thus sucks the fluid from the tank and discharges it under pressure in the easements 9 of the distributor circuit 2 thanks to the rotation. of the rotor driven by the turbine.
  • the object of the invention is a supply system temporarily replacing the generator circuit 1 of pressurized fluid for the reasons mentioned previously in the preamble.
  • This supply system is schematically constituted, in FIG. 1, by a source of pressurized fluid 20, external to the fluidic system of the aircraft and of which an outlet 21 is connected by a fluid line 22 to the inlet 8 of the circuit distributor through a valve 24 allowing switching between the passage of the fluid from the generator circuit 1 and the passage of the fluid from the supply system and vice versa.
  • Line 14 connecting the easements 9 to the cover 11 is retained.
  • the outlet 17 of the tank 12 comprises a valve 26, which has the same function as the previous one and thus allows the switching of the fluid from the tank to the generator circuit 1 or to an inlet 27 of the source of pressurized fluid 20 by a fluid line 28.
  • This supply system thus replacing the generator circuit 1 advantageously comprises auxiliary fluid means 30 capable of delivering a volume of annexed fluid under pressure in the tank 12, when the level of fluid 32 contained in the tarpaulin, reaches a predetermined threshold capable of being reached when the various easements 9 are solicited.
  • These fluidic means 30 avoid an overpressure in the tarpaulin, because the large volume of fluid in return for the easements, which could then explode and cause considerable incidents.
  • These means 30 are connected, via an outlet 33 to an inlet 34 of the tank 12, by means of a pipe or pipe 35 and are actuated by means of detection 36 of the level of the fluid 32, arranged on the cover 12.
  • the detection means 36 deliver by an electrical connection 38, an electrical signal, which authorizes the sending of annexed fluid under pressure into the enclosure of the tank 12, allowing the discharge of the fluid overflow through the pipe 28 of the supply system.
  • the annexed fluid under pressure is a neutral gas.
  • FIG. 2 shows the fuselage 40 (in broken lines) of an aircraft which rests on the ground 41 (in broken lines) of a hangar for assembling and / or maintaining these devices.
  • the generator circuit no longer appears since it has been replaced by the pressurized fluid system of the invention and which is supplied by a hydraulic unit 20.
  • This hydraulic unit 20 consists of the assembly of a reservoir 43 and a hydraulic pump 44 connected by a pipe 46 to a solenoid valve 48 arranged in a console 47 for controlling and regulating said fluid; a pipe 45 ensures the return of the fluid to the reservoir 43.
  • the pipe 22 is composed of two parts 22a and 22b connected to each other by means of a self-sealing valve 50 or park plug, provided in the fuselage 40 of the aircraft.
  • a self-sealing valve 50 or park plug provided in the fuselage 40 of the aircraft.
  • the part of the distributor circuit 2 of the aircraft connecting the easements 9 to the cover 12, via the pipe 14, remains unchanged, which eliminates the risks of deterioration of the fittings and introduction of air into the pipes internal circuits of the aircraft.
  • the fluid line 28 for return or suction, connecting the outlet 17 of the tank 12 through the valve 26 to the inlet 27 of the console 47 is composed, like the line 22, of two parts 28a and 28b connected together by a self-sealing valve 51.
  • a switch 53 On the part 28b of the pipe 28 located between the self-sealing valve 51 and the console 47 are interposed a switch 53, a pressure limiter 54 and a calibrated non-return valve 55.
  • the auxiliary fluidic means 30 consist of a source of fluid 60, advantageously a neutral gas, of a pressure valve 61 with which a pressure gauge 62 is associated and connected to the source 60 through a filter 64 and of an electro distributor 63 connected to the pressure gauge 62.
  • the outlet pipe 35 is then connected to the inlet 34 of the cover 12 of the distributor circuit 2 of the aircraft.
  • this pipe 35 consists of two parts 35a and 35b connected together by a pressure relief valve 65 depressurization arranged in the fuselage 40 of the aircraft.
  • the detection means 36 located on the cover 12 are constituted in particular by a microswitch contactor controlled by a float 66 resting on the level 32 of fluid contained in the cover.
  • This microswitch 36 is connected, by the electrical link 38 previously mentioned, to the solenoid valve 63.
  • Safety members have been interposed on the part 35a of the pipe 35 located between the valve 65 and the auxiliary fluid means 30, such as a pressure limiter 68 and a contactor 69.
  • the operation of the supply system is carried out as follows: after having connected the various delivery or fluid supply lines 22, suction or return of the fluid 28 and of the auxiliary fluid means 30 on the distributor circuit 2 of the aircraft and carried out the starting of the hydraulic pump 44, the supply from the hydraulic unit 20 can be carried out.
  • the operator activates the start-up of the supply system, after having checked and checked the various safety features of the system, from the control and regulation console 47.
  • the two-position solenoid valve 48 placed in the console, switches and allows the passage of the pressurized fluid discharged by the pump 44 in the piping 46, in the fluid line 22, which then ensures the supply of the easements 9. It has been represented symbolically in FIG. 2, some of these easements such as landing gear, flight controls and braking systems.
  • the operator can then from the cockpit of the aircraft control the operation of one or more of the easements so as to verify and control their operation.
  • the pressurized fluid returns to the tank 12 through the line 14 through the filter 15.
  • the level of fluid 32 rises in the tank, the significant supply of fluid from the return of the easements 9.
  • the float 66 of the microswitch level detector 36 resting on the fluid level 32 also rises until it reaches a corresponding position at a predetermined threshold and equal to a given volume of fluid in the cover 12.
  • an electrical signal, delivered by the microswitch 36 is sent by the electrical connection 38 to the solenoid valve 63, which switches and injects the neutral gas delivered by the annexed fluid source 60 into the tank 12 via the pipe 35, this neutral gas having a pressure greater than the pressure of the fluid contained in the tank.
  • the annex gas entering the tank pushes the hydraulic fluid through the return line 28 and the float, having continued to rise by a certain height due to the significant addition of fluid previously mentioned, descends and returns by the threshold of the level detector 36 then closing the microswitch, which has the consequence of cutting the electrical connection 38 and causing the solenoid valve 63 to switch to the closed position.
  • the pressurized gas supply is then cut off.
  • the hydraulic fluid flows and is evacuated via the return and suction line 28 through the tared non-return valve 55, which opens under pressure which is greater than its initial setting, up to the whole. of the reservoir 43 and of the pump 44 via the line 45 connected to the console 47.
  • the level 32 of the fluid, contained in the tank, continues to drop until the pressure there reaches the setting value of the non-return valve 55 which then closes the flow of the fluid from the pipe 28 to the pipe 45.
  • This non-return valve 55 maintains the filling with hydraulic fluid of line 28 of the supply system and of line 14 and of the distributor circuit 2 of the aircraft.
  • the pressure limiter 54 arranged on the discharge line 28, and the pressure limiter 68, arranged on the line 35, prevent too high a return in pressure on the one hand, of the hydraulic fluid to the reservoir 43 and on the other share, from gas to source 60.
  • the supply system As soon as the tests and controls are completed, the supply system, according to the invention, is disconnected after having put the valves 24 and 26 in communication with the generator circuit of the aircraft. The latter's hydraulic system is then operational.
  • FIG. 3 represents the electrical circuit of the supply system according to the invention, endowed with operating safety.
  • the circuit supplied by a low voltage source, comprises an on-off switch 75 arranged on the console 47 and the output 76 of which is connected, on the one hand, to a control lamp 77 for energizing the power supply system by a link 78 and on the other hand, to the switch 69 by a link 79.
  • This switch is located on the auxiliary fluid means between the solenoid valve 63 and the pressure gauge 62, associated with the valve 61.
  • the purpose of the switch is to prohibit the actuation of the supply system in the event of a lack pressure in the fluid means for supplying neutral gas, by acting on the solenoid valve 48 located in the console 47, which controls the supply of hydraulic fluid to the system via line 22.
  • the switch switches position and prohibits the operation of the system.
  • the operator is then warned by a flashing indicator lamp 80 and by an audible warning device 81, arranged in parallel and connected to said switch by, respectively, a link 82 and a link 83.
  • the switch 69 occupies the position illustrated and is in relation, by an electrical connection 84, with a relay 85, with which is associated the microswitch or contactor 36 disposed on the cover 12.
  • the relay 85 is able to control a switch 86 connected to the solenoid valve 63 of the auxiliary fluid means 30 by an electrical connection 87.
  • the microswitch 36 is in the closed position, which means that the level 32 of fluid contained in the cover 12 is below the trigger threshold of the microswitch controlled by the float 66. Consequently, the switch is open since '' it is repelled by the relay 85 and does not trigger the start-up of the solenoid valve 63.
  • the microswitch 36 opens and the relay 85 no longer acts against the switch 86.
  • the latter closes, causes the current from the switch 69 to pass through the link 87 and the tilting of the solenoid valve 63, which then allows the injection of the neutral gas under pressure into the tank 12 until the float goes back through said threshold so as to close the microswitch 36 and to open the switch 86 via the relay 85, cutting off the gas supply.
  • the detection means 30 comprise a contactor 90 of the high level of the fluid maximum tolerated in the tarpaulin.
  • This contactor 90 is connected to the output of the switch 69 by a link 91 and to the input of the switch 53 disposed on the fluid return line 28.
  • the switch 53 shown in the operating position, is connected to the electro-distributor 48 for supplying pressurized hydraulic fluid, preventing the case of overpressure in the return circuit 28.
  • This switch 53 then switches and immediately causes the position of the solenoid valve 48 to change, which cuts off all fluid supply to the easements 9.
  • the pressurized fluid contained in the tank can then be evacuated towards the tank 43 through the tared non-return valve 55 of the pipe 28.
  • the switch 53 is connected to a flashing lamp 92, which warns the operator that the pressure is too high.
  • the opening of the high level contactor 90 immediately causes the position of the solenoid valve 48 to change, which cuts off all fluid supply to the services 9.

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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)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Claims (12)

1. Speisesystem (20) für ein Druckfluid zur zeitweisen Verbindung mit einem Fluidsystem (1, 2), das aus einem Erzeugerkreis (1) für ein Druckfluid besteht und aus einem Verteilerkreis (2) für dieses Fluid, wobei der Verteilerkreis Verbraucher (9) beinhaltet, deren Ausgang (10) mit dem Eingang eines Behälters (12) verbunden ist, der wiederum mit dem Fluid-Erzeugerkreis (1) zur Lieferung des Druckfluids mit einem Eingang (8) der Verbraucher (9) verbunden ist, und wobei das Speisesystem (20) geeignet ist, den Fluid-Erzeugerkreis (1) zu ersetzen, dadurch gekennzeichnet, daß das Speisesystem geeignet ist, einerseits über eine Speiseleitung (22) mit den Eingängen (8) der Verbraucher (9) und andererseits über eine Rückleitung (28) mit einem Ausgang (17) des Behälters (12) verbunden zu sein, und, daß das Speisesystem Fluid-Hilfsmittel (30) aufweist, die mit dem Behälter (12) des Fluidverteilerkreises (2) verbunden und geeignet sind, dem Behälter (12) ein Ersatz-Druckfluid zuzuführen, wenn das im Behälter enthaltene Fluid-Niveau (32) an einen vorbestimmten, während der Beanspruchung durch die Verbraucher (9) erreichbaren Schwellwert gelangt, und daß das Speisesystem an dem Behälter (12) angeordnete Anzeigemittel (36) zur Anzeige des Fluid-Niveaus (32) aufweist, die ein In-Betriebsetzen der Fluid-Hilfsmittel (30) sicherstellen.
2. Speisesystem für ein Druckfluid nach Anspruch 1, dadurch gekennzeichnet, daß die Fluid-Hilfsmittel (30) ein Druckventil (61) beinhalten, das über einen Filter (64) mit einer Druckfluidquelle (60) verbunden ist, ferner ein mit dem Druckventil (61) verbundenes Manometer (62) zur Messung des Fluid-Drucks und einen Magnetschieber (63), der auf einer Leitung (35) angeordnet ist, die einen Ausgang des Ventils (61) mit dem Behälter (12) des Verteilerkreises für das Druckfluid verbindet.
3. Speisesystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Anzeigemittel aus einem Niveau-Detektor (36) bestehen, der mit dem Magnetschieber (63) der Fluid-Hilfsmittel (30) verbunden ist.
4. Speisesystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Niveau-Detektor (36) einerseits eine Bewegung des Magnetschiebers (63) in eine geöffnete Position ermöglicht, in der Ersatzfluid unter Druck in den Behälter (12) eingespritzt wird, wenn das Fluid-Niveau (32) in dem Behälter (12) ansteigt und den Schwellwert erreicht, und andererseits, wenn das Fluid-Niveau (32) in dem Behälter (12) sich absenkt und den Schwellwert unterschreitet, eine Bewegung des Magnetschiebers (63) in eine geschlossene Position, wodurch die Einspritzung von Ersatzdruckfluid in den Behälter gestoppt wird.
5. Speisesystem nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Leitung (35), die den Magnetschieber (63) und den Einlaß des Behälters (12) verbindet, ein Überdruck-Ablaßventil (65) aufweist.
6. Speisesystem nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß es einen elektrischen Schalter (69) aufweist, der auf der Leitung (35) für die Fluid-Hilfsmittel (30) angeordnet ist und bei einem Abfall des von der Druckfluidquelle (60) abgegebenen Drucks die Förderung des Fluids zu den Verbrauchern (9) unterbindet.
7. Speisesystem nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Anzeigemittel ferner einen elektrischen Kontaktgeber (90) für ein hohes Fluid-Niveau des in dem Behälter enthaltenen Fluids beinhalten, wobei der elektrische Kontaktgeber (90) die Förderung von Fluid zu den Verbrauchern (9) unterbindet, wenn das Fluid-Niveau in dem Behälter über einen vorbestimmten Wert ansteigt.
8. Speisesystem nach einem der vorstehenden Ansprüche und nach Anspruch 5, dadurch gekennzeichnet, daß auf der Fluid-Leitung (35) zwischen dem Magnetschieber (63) und dem Überdruck-Ablaßventil (65) ein Druckbegrenzer (68) angeordnet ist.
9. Speisesystem nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das von der Druckquelle (60) abgegebene Fluid ein neutrales Gas ist.
10. Speisesystem nach Anspruch 1, dadurch gekennzeichnet, daß es ein mit einer Hydraulikzentrale (20) verbundenes Bedienungspult (47) zur Steuerung und Regelung des Fluids aufweist, das einerseits über die Leitung (22) zur Speisung oder Stauung des unter Druck stehenden Fluids mit dem Eingang (8) des Verbrauchers (9) verbunden ist und andererseits über die Leitung (28) zur Rückführung oder zum Ansaugen von Fluid mit dem Ausgang (17) des Behälters (12).
11. Speisesystem nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Speiseleitungen (22) und die Rückleitungen (28) für das Fluid jeweils ein selbstdichtendes Ventil (50, 51) aufweisen.
12. Speisesystem nach einem der Ansprüche 1, 10, 11, dadurch gekennzeichnet, daß auf der Rückleitung (28) des vom Behälter (12) abgegebenen Fluids ein elektrischer Schalter (53), ein Druckbegrenzer (54) und ein vorbelastetes Rückschlagventil (55) in Reihe angeordnet sind.
EP87400216A 1986-02-26 1987-01-30 Speisesystem für Druckflüssigkeit Expired EP0238368B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8602635 1986-02-26
FR8602635A FR2594970B1 (fr) 1986-02-26 1986-02-26 Systeme d'alimentation en fluide sous pression

Publications (2)

Publication Number Publication Date
EP0238368A1 EP0238368A1 (de) 1987-09-23
EP0238368B1 true EP0238368B1 (de) 1989-06-28

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EP87400216A Expired EP0238368B1 (de) 1986-02-26 1987-01-30 Speisesystem für Druckflüssigkeit

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Country Link
US (1) US4735380A (de)
EP (1) EP0238368B1 (de)
JP (1) JPS62209202A (de)
CA (1) CA1281262C (de)
DE (1) DE3760282D1 (de)
FR (1) FR2594970B1 (de)

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Also Published As

Publication number Publication date
DE3760282D1 (en) 1989-08-03
US4735380A (en) 1988-04-05
JPS62209202A (ja) 1987-09-14
CA1281262C (fr) 1991-03-12
FR2594970A1 (fr) 1987-08-28
FR2594970B1 (fr) 1988-06-10
EP0238368A1 (de) 1987-09-23

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