EP0377544A1 - Distributeur proportionnel pour la commande de récepteurs hydrauliques - Google Patents

Distributeur proportionnel pour la commande de récepteurs hydrauliques Download PDF

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Publication number
EP0377544A1
EP0377544A1 EP90420007A EP90420007A EP0377544A1 EP 0377544 A1 EP0377544 A1 EP 0377544A1 EP 90420007 A EP90420007 A EP 90420007A EP 90420007 A EP90420007 A EP 90420007A EP 0377544 A1 EP0377544 A1 EP 0377544A1
Authority
EP
European Patent Office
Prior art keywords
piston
rod
spring
receiver
loaded
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Withdrawn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
EP90420007A
Other languages
German (de)
English (en)
French (fr)
Inventor
Maurice Tardy
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0377544A1 publication Critical patent/EP0377544A1/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Withdrawn legal-status Critical Current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
    • 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
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation 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
    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/163—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation
    • 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
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control valve
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Definitions

  • the present invention relates to a proportional distributor for controlling hydraulic receivers.
  • proportional distributors for controlling hydraulic receivers.
  • An advantage of the proportional distributor is that it allows independence of simultaneous movements in the different receivers.
  • this type of device has limits, since this independence of movement no longer exists when the sum of the flow rates of the receivers used simultaneously is greater than the flow rate of the pump.
  • the flow preferably going to the least loaded receiver.
  • Figure 1 of the accompanying schematic drawing shows a partial view in section of a proportional distributor.
  • the distributor is arranged symmetrically with respect to the axis Y′Y.
  • the main drawer of the distributor is mounted in a bore formed in the body 3 , this bore comprising a certain number of annular grooves, while the drawer 2 also comprises annular grooves opening into its wall.
  • this distributor is intended to supply a receiver designated by the general reference 4 , which can be constituted for example by a jack.
  • the body 3 has a second bore inside which a compensator slide 5 is slidably mounted subject to the load of a spring 6 .
  • the hydraulic fluid is conveyed by a pump 7 from a reservoir 8 .
  • n of receivers is equal to 2.
  • the least loaded receiver receiving a flow rate Q1 will receive the entire flow rate necessary for it.
  • the most loaded receiver will receive a flow of a value Q - Q1, which is less than Q2, the theoretical flow required for this second receiver.
  • the document FR. A. 2,587,419 relates to a device allowing the reduction of the flow rate of the least loaded receptor (s), by reducing the calibration of the pressure balance of the compensators. This reduction in the calibration is obtained by implementing a correction pressure, of value less than the pressure of the busiest user, generated by a valve which should be controlled, depending on the direction of variation sought for correction pressure. It is a complex and expensive solution, which cannot be mounted on existing facilities.
  • the object of the invention is to provide a proportional distributor with which it is possible to have simultaneity of movements, whatever the relative loads of the receivers.
  • the proportional distributor which it concerns comprising means reducing the flow rate of the least loaded receiver (s) as a function of the load of the most loaded receiver (s), is characterized in that these means use the pressure of the or the most loaded receivers 24, which is applied directly to each compensator slide 5 supplying the receivers 4, 24, and which acts against the action of the spring 6.
  • each compensator drawer consist of a rod coaxial with this drawer and bearing on the face thereof opposite to that on which the calibration spring acts, and whose free end is equipped with a piston on which the pressure of the fluid supplying the most loaded receiver is applied.
  • the rod acting on the compensator slide is surrounded by a spring bearing, on the one hand, in a bore formed in the body and, on the other hand, on the face of the piston opposite to that on which the pressure of the fluid supplying the most loaded receiver acts.
  • a spring bearing on the one hand, in a bore formed in the body and, on the other hand, on the face of the piston opposite to that on which the pressure of the fluid supplying the most loaded receiver acts.
  • the rod acting on the compensator slide is surrounded by a spring bearing, on the one hand, in the bottom of a bore formed in the body and, on the other hand, on a washer disposed inside this bore, traversed by the rod and whose movement towards the piston is limited by a stop, the distance between the washer and the stop being such that during the displacement of the piston and the rod, the piston first comes to bear against the washer and before possibly moving the latter axially against the action of the spring.
  • this threshold corresponding to the abutment of the piston against the washer actuated by the spring.
  • the means intended to limit the action of the fluid pressure on the rod consist of a hydraulically driven piston.
  • the compensator drawer is equipped, on its face opposite to that associated with a calibration spring, with a rod on which is capable of acting against the action of the spring taring the core of an electromagnet.
  • At least one element with a "or" function for supplying power to the piston placed at the end of the rod from the busiest fluid circuit. If the number of receivers is n, the number of elements with "or" function is n - 1. In all cases, this is a simple, reliable and inexpensive installation, which can also be mounted on existing devices.
  • FIG. 2 represents a system similar to that of FIG. 1 in which the same elements are designated by the same references as above.
  • the system comprises a first receiver 4 which can be considered to be the least loaded. It is supplied with fluid by a flow Q1 supplied under a pressure P1.
  • the second receiver 24 is the busiest receiver; the pump supplies it with a flow rate Q2 under a pressure P2.
  • each compensator drawer 5 is supported, coaxially with the latter, a rod 16 whose end face forms a piston 17 of section s, on which the pressure P2 is applied of the busiest receiver 24 .
  • the selection of this pressure is carried out by means of a member 18 with "or" function.
  • Selecting section s allows you to adjust the level of correction.
  • FIG. 3 represents an alternative embodiment in which a spring 19 coaxially surrounding the rod 16 and housed inside a bore 20 bears, on the one hand, on the bottom of the bore and, on the other hand part, against the face of the piston 17 opposite to that against which the fluid pressure is exerted.
  • the opposing force of the spring 19 makes it possible to modify the correction law resulting from the pressure P2 on the piston 17 .
  • the spring 19 housed inside the bore 20 , bears not directly against the piston 17 , but against a washer 21 freely traversed by the rod 16 and whose the movement towards the piston 17 is limited by a circlip 22 .
  • the piston 17 comes into contact with the washer 21 , it encounters an additional opposing force equal to the preload value of the spring 19 .
  • FIG. 5 represents an alternative embodiment in which at mid-length of the rod 16 is disposed a piston 23 mounted inside a chamber 25 inside which a fluid pressure Pc is established. This fluid pressure generates a force antagonistic to that exerted by the fluid under a pressure P2 on the piston 17 .
  • FIG. 6 represents an alternative embodiment in which the force opposing the calibration spring is provided by an electromagnet 26 acting on the end of the rod 16 opposite to that secured to the compensator drawer 5 .
  • the core of the electromagnet is immersed in the fluid supplied by the conduit 27 , which allows balancing of the forces due to the pressure.
  • Each distributor element can have a correcting device defined as a function of the receiver which it supplies.
  • the invention brings a great improvement to the existing technique by providing a proportional distributor of simple design and making it possible to benefit from a simultaneity of movements in different receivers whatever the relative loads thereof. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Coating Apparatus (AREA)
EP90420007A 1989-01-06 1990-01-04 Distributeur proportionnel pour la commande de récepteurs hydrauliques Withdrawn EP0377544A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900566A FR2641583A1 (fr) 1989-01-06 1989-01-06 Distributeur proportionnel pour la commande de recepteurs hydrauliques
FR8900566 1989-01-06

Publications (1)

Publication Number Publication Date
EP0377544A1 true EP0377544A1 (fr) 1990-07-11

Family

ID=9377834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90420007A Withdrawn EP0377544A1 (fr) 1989-01-06 1990-01-04 Distributeur proportionnel pour la commande de récepteurs hydrauliques

Country Status (2)

Country Link
EP (1) EP0377544A1 (zh)
FR (1) FR2641583A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672944A1 (fr) * 1991-02-15 1992-08-21 Bennes Marrel Distributeur proportionnel et ensemble de commande d'une pluralite de recepteurs hydrauliques comportant pour chaque recepteur un tel distributeur.
EP0638730A1 (en) * 1993-06-24 1995-02-15 Voac Hydraulics Boras Ab Control means for a hydraulic motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2548290A1 (fr) * 1983-06-14 1985-01-04 Linde Ag Installation hydraulique comportant une pompe et au moins deux equipements utilisateurs d'energie hydraulique alimentes par cette pompe
DE3522450A1 (de) * 1985-06-22 1987-01-02 Bosch Gmbh Robert Hydraulische einrichtung zum betaetigen eines verstellteils
FR2587419A1 (fr) * 1985-09-13 1987-03-20 Rexroth Mannesmann Gmbh Dispositif de commande pour au moins deux consommateurs de fluide hydraulique alimentes par au moins une pompe
DE3713824A1 (de) * 1987-04-24 1988-11-03 Rexroth Mannesmann Gmbh Ventilanordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2548290A1 (fr) * 1983-06-14 1985-01-04 Linde Ag Installation hydraulique comportant une pompe et au moins deux equipements utilisateurs d'energie hydraulique alimentes par cette pompe
DE3522450A1 (de) * 1985-06-22 1987-01-02 Bosch Gmbh Robert Hydraulische einrichtung zum betaetigen eines verstellteils
FR2587419A1 (fr) * 1985-09-13 1987-03-20 Rexroth Mannesmann Gmbh Dispositif de commande pour au moins deux consommateurs de fluide hydraulique alimentes par au moins une pompe
DE3713824A1 (de) * 1987-04-24 1988-11-03 Rexroth Mannesmann Gmbh Ventilanordnung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672944A1 (fr) * 1991-02-15 1992-08-21 Bennes Marrel Distributeur proportionnel et ensemble de commande d'une pluralite de recepteurs hydrauliques comportant pour chaque recepteur un tel distributeur.
EP0500419A1 (fr) * 1991-02-15 1992-08-26 Marrel Distributeur proportionnel et ensemble de commande d'une pluralité de récepteurs hydrauliques comportant pour chaque récepteur un tel distributeur
US5222426A (en) * 1991-02-15 1993-06-29 Marrel Proportional distributor and control system for a plurality of hydraulic receivers incorporating a distributor of this kind for each receiver
EP0638730A1 (en) * 1993-06-24 1995-02-15 Voac Hydraulics Boras Ab Control means for a hydraulic motor
US5501136A (en) * 1993-06-24 1996-03-26 Voac Hydraulics Boras Ab Control system for a hydraulic motor

Also Published As

Publication number Publication date
FR2641583A1 (fr) 1990-07-13
FR2641583B1 (zh) 1994-04-22

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