EP0038757A1 - Circuit de distribution de fluide sous pression - Google Patents

Circuit de distribution de fluide sous pression Download PDF

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Publication number
EP0038757A1
EP0038757A1 EP81400619A EP81400619A EP0038757A1 EP 0038757 A1 EP0038757 A1 EP 0038757A1 EP 81400619 A EP81400619 A EP 81400619A EP 81400619 A EP81400619 A EP 81400619A EP 0038757 A1 EP0038757 A1 EP 0038757A1
Authority
EP
European Patent Office
Prior art keywords
conduit
communication
distributors
circuit
distributor
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Withdrawn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
EP81400619A
Other languages
German (de)
English (en)
French (fr)
Inventor
Pierre Christian Fillion
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.)
Poclain SA
Original Assignee
Poclain 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 Poclain SA filed Critical Poclain SA
Publication of EP0038757A1 publication Critical patent/EP0038757A1/fr
Withdrawn legal-status Critical Current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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/413—Flow control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/421—Flow control characterised by the type of actuation mechanically
    • F15B2211/423—Flow control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups

Definitions

  • Pressurized fluid distribution circuits are already known, in which a use circuit can be supplied by a source of pressurized fluid which is specially assigned to it, and, possibly, by one or more other sources which are not assigned to it. permanently affected, but which may be affected for specific periods of time.
  • the invention proposes an arrangement which makes it possible to achieve this object, this in a simple, reliable and inexpensive manner, by means of two drawer distributors grouped in a single body and comprising a single drawer.
  • the bodies of the first and second distributors, as well as their movable members are integral with each other, respectively, while each of said first and second distributors is of the progressive type, allowing a gradual passage between the configurations corresponding to these first and second positions, and, that the control devices of the first and second distributors are coupled to one another, so as to produce a time difference in the passage of each of these distributors from its second to its first position.
  • the distributor assembly 21 in which the distributors are integrated, is shown in diagrammatic section.
  • Ten distinct grooves are formed in the body 22 and open into bore 23: these are, successively, from left to right, the grooves 26, 27, 28, 29, 30, 31, 32, 33, 34 and 35.
  • the drawer 24 itself comprises four grooves 36, 37, 38 and 39, also listed in this order, successively, from left to right.
  • the non-return valve 43 allows the passage of the fluid only from the groove 30 towards the groove 33.
  • first and second positions which have just been defined correspond to the positions of the same order of the schematic distributors with only two positions 3 and 7 in FIG. 1.
  • the distributor 3, in its first position isolates one on the other the conduits 2 and 15, putting them on the contrary in communication in its second position, while the distributor 7, in its first position, isolates the conduits 6 and 17, on the contrary putting these conduits in communication in its second position.
  • the pressurized fluid coming from the pumps 1 and 4 through the conduits 2 and 5/6 arrives in the grooves 30 and 31, and escapes from these grooves towards the adjacent grooves 29 and 32, to finally return to the tank via the conduits 15 and 17, respectively.
  • the axial faces delimiting the first direct shoulder 49 and the second opposite shoulder 52 are oriented in opposite directions, in a similar manner to the axial faces delimiting the first opposite shoulder 50 and the second direct shoulder 51.
  • the pumps 1 and 4 When the distributors 3 and 7 are placed in their second positions, the pumps 1 and 4 are connected to the reservoir 16. The displacement of the slide 24 towards its first extreme position will progressively reduce the passages between the grooves 30 and 29 on the one hand, and, the grooves 31 and 32, on the other hand. Thus, the flow rates of the pumps 1 and 4, initially discharged into the tank 16, will they be directed to the circuit 9. If the communication with the tank 16 was interrupted, simultaneously, for the pipe 2 and for the pipe section 6, the entire flow of pumps 1 and 4 would be directed to circuit 9, preventing any precise operation.
  • the communication with the reservoir 16 is reduced, then eliminated for the conduit 2, while being maintained for the section 6 (space 58).
  • the circuit 9 is only supplied by the only pump 1, therefore with a flow which can be low, and which is, in any case, less than the sum of the flow rates of pumps 1 and 4, so that the desired precision can be obtained.
  • the progressivity slots 53 perform their already known function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Pipeline Systems (AREA)
EP81400619A 1980-04-22 1981-04-17 Circuit de distribution de fluide sous pression Withdrawn EP0038757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8009011 1980-04-22
FR8009011A FR2480871A1 (fr) 1980-04-22 1980-04-22 Circuit de distribution de fluide sous pression

Publications (1)

Publication Number Publication Date
EP0038757A1 true EP0038757A1 (fr) 1981-10-28

Family

ID=9241216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400619A Withdrawn EP0038757A1 (fr) 1980-04-22 1981-04-17 Circuit de distribution de fluide sous pression

Country Status (2)

Country Link
EP (1) EP0038757A1 (enExample)
FR (1) FR2480871A1 (enExample)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044786A (en) * 1976-07-26 1977-08-30 Eaton Corporation Load sensing steering system with dual power source

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044786A (en) * 1976-07-26 1977-08-30 Eaton Corporation Load sensing steering system with dual power source

Also Published As

Publication number Publication date
FR2480871A1 (fr) 1981-10-23
FR2480871B1 (enExample) 1983-10-21

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE GB IT

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19821004

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FILLION, PIERRE CHRISTIAN