EP2302221A1 - Hydraulic circuit with multiple configurations, apllication for a dump truck, and dump truck using such a circuit - Google Patents

Hydraulic circuit with multiple configurations, apllication for a dump truck, and dump truck using such a circuit Download PDF

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Publication number
EP2302221A1
EP2302221A1 EP10173294A EP10173294A EP2302221A1 EP 2302221 A1 EP2302221 A1 EP 2302221A1 EP 10173294 A EP10173294 A EP 10173294A EP 10173294 A EP10173294 A EP 10173294A EP 2302221 A1 EP2302221 A1 EP 2302221A1
Authority
EP
European Patent Office
Prior art keywords
bypass
solenoid valve
controlled
dump truck
hydraulic circuit
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.)
Granted
Application number
EP10173294A
Other languages
German (de)
French (fr)
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EP2302221B1 (en
Inventor
Christian Driesbach
Jean-Jack Menard
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 dEquipement Manutention et Transports SA
Original Assignee
Societe dEquipement Manutention et Transports SA
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Priority to PL10173294T priority Critical patent/PL2302221T3/en
Publication of EP2302221A1 publication Critical patent/EP2302221A1/en
Application granted granted Critical
Publication of EP2302221B1 publication Critical patent/EP2302221B1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F3/00—Vehicles particularly adapted for collecting refuse
    • 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
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/20584—Combinations of pumps with high and low capacity
    • 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
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3138—Directional control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31505—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and a return line
    • F15B2211/31511—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and a return line having a single pressure source
    • 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
    • F15B2211/31529—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having a single pressure source and a single output member
    • 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 invention relates generally to the design of hydraulic power circuits.
  • the invention relates, according to a first aspect, to a hydraulic circuit comprising a reservoir of hydraulic fluid, first and second pumps, and first and second pressurized fluid distribution lines, designed to feed their respective outlets with first and second hydraulic receivers.
  • the two pump hydraulic circuits are generally used to power comparable receivers and intended to be simultaneously placed in an active state or in a state of rest.
  • the present invention aims to provide a hydraulic circuit that meets this need.
  • the hydraulic circuit of the invention is essentially characterized in that the first and second distribution lines are connected to one another by a common node connected to the first pump by a first controlled bypass, in that first and second stop solenoid valves are respectively arranged on the first and second lines between their common node and the respective outputs of these first and second lines, and in that a point of the second line, intermediate between the second solenoid valve and the output of the second line, is connected to the second pump through a second controlled bypass, each controlled bypass being selectively placed in an active position, in which the fluid passing through this bypass feeds at least one receiver, and in a recirculation position, in which the fluid passing through this bypass returns to the reservoir.
  • the invention is particularly useful in the case where the first and second pumps are mechanically coupled to each other.
  • first and second pumps respectively have first and second flow capacities, and that the first flow capacity is greater than the second.
  • this hydraulic circuit further comprises a first non-return valve, blocking towards the first solenoid valve, and disposed between this first solenoid valve and said intermediate point, and a second non-return valve, blocking towards the second controlled bypass, disposed between said intermediate point and second controlled bypass.
  • the invention also relates to the use of a hydraulic circuit as previously described, for the selective actuation of a compacting press and a lifting device fitted to a dump truck driven by a heat engine also designed to operating the pumps, characterized in that the first receiver comprises the compacting press, and in that the second receiver comprises the container lifter.
  • the hydraulic circuit is preferably at least controlled according to a first configuration, in which the first bypass is in the active position, in which the second bypass is in the recirculation position, in which the first solenoid valve is in blocking position, and wherein the second solenoid valve is in the driving position, the hoist being operated while the dump truck is stopped and the engine is idling.
  • the hydraulic circuit can also preferably be at least controlled according to a second configuration, in which the first bypass is in the active position, in which the second bypass is in the recirculation position, in which the first solenoid valve is in the driving position, and in which the second solenoid valve is in position blocking, this second configuration to operate alone compacting press when moving the dump truck.
  • the hydraulic circuit can advantageously also be used while being at least controlled according to a third configuration, in which the first and second bypass are in the active position, and in which the first and second solenoid valves are in the driving position, the compacting press and the container lifter being actuated while the dump truck is stopped and that the engine is running in accelerated mode.
  • the invention also relates to a dump truck characterized in that it uses a hydraulic circuit as previously defined.
  • the invention relates in particular to a hydraulic circuit comprising, in the illustrated embodiment, an RSV reservoir for hydraulic fluid, two pumps P1 and P2, two pressurized fluid distribution lines L1 and L2, and two hydraulic receivers. R1 and R2.
  • this circuit is mounted on a dump truck driven by a heat engine and equipped with a hydraulic compacting press forming the first receiver R1, and a hydraulic container hoist forming the second receiver R2.
  • the pumps P1 and P2 which are themselves driven by the thermal engine of the dump truck and which are connected to the reservoir RSV to draw the hydraulic fluid, are mechanically coupled to one another and are in practice constituted by two pump stages integrated in the same pump body.
  • the first pump P1 has a flow capacity greater than the flow capacity of the second pump P2, the ratio of these flow capacities being, for example, order of 2.
  • the distribution lines L1 and L2 are connected, by their respective ends L1s and L2s, to the receivers R1 and R2 which selectively supply hydraulic fluid under pressure.
  • these distribution lines L1 and L2 are connected to one another by a common node N12, which is itself connected to the first pump P1 by a first controlled bypass BP1.
  • stop solenoid valves EV1 and EV2 are respectively arranged on lines L1 and L2, between the common node N12 of these lines and the respective outputs L1s and L2s of these same lines L1 and L2.
  • the intermediate point P12 of the second line L2 which is arranged between the second solenoid valve EV2 and the output L2s of the second line L2, is connected to the second pump P2 through a second controlled bypass BP2.
  • Each of the controlled by-pass BP1 and BP2 is placed at will either in an active position, in which the fluid passing through this bypass feeds at least one of the receivers R1 and R2, or in a recirculation position, in which the fluid passing through this bypass returns to the RSV tank.
  • bypass BP1 illustrated in the figure is in the active position, while the bypass BP2 is in the recirculation position.
  • the hydraulic circuit further comprises a first non-return valve VAR1, blocking towards the first solenoid valve EV1, and disposed between this first solenoid valve EV1 and the intermediate point PI2, and a second non-return valve VAR2, blocking towards the second controlled bypass BP2, and disposed between the intermediate point PI2 and second controlled bypass BP2.
  • the hydraulic circuit thus designed can, on command, adopt several advantageous configurations.
  • the first bypass BP1 is in the active position
  • the second bypass BP2 is in the recirculation position
  • the first solenoid valve EV1 is in the blocking position
  • the second solenoid valve EV2 is in position bandwidth.
  • the first bypass BP1 is in the active position
  • the second bypass LP2 is in the recirculation position
  • the first solenoid valve EV1 is in the conducting position
  • the second solenoid valve EV2 is in the blocking position.
  • This second configuration allows to operate alone compacting press R1, both while the dump truck rolls than while it is stopped.
  • the first and second bypass BP1 and BP2 are in the active position, and the first and second solenoid valves EV1 and EV2 are in the driving position.
  • the compaction press R1 and the R2 container lifter are actuated together while the dump truck is stopped and the engine is running in accelerated mode.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The circuit has pressurized fluid distribution lines (L1, L2) connected to each other by a common node (N12) that is connected to a pump (P1) by a controlled by-pass (BP1). An intermediate point (PI2) of one of the lines is connected to another pump (P2) through another controlled by-pass (BP2). The by-passes are placed in an active position in which fluid traversing the by-passes respectively feed two receivers (R1, R2), and in a recirculation position in which the fluid traversing the by-passes returns to a hydraulic fluid reservoir (RSV).

Description

L'invention concerne, de façon générale, la conception de circuits hydrauliques de puissance.The invention relates generally to the design of hydraulic power circuits.

Plus précisément, l'invention concerne, selon un premier aspect, un circuit hydraulique comprenant un réservoir de fluide hydraulique, des première et deuxième pompes, et des première et deuxième lignes de distribution de fluide sous pression, conçues pour alimenter par leurs sorties respectives des premier et deuxième récepteurs hydrauliques.More specifically, the invention relates, according to a first aspect, to a hydraulic circuit comprising a reservoir of hydraulic fluid, first and second pumps, and first and second pressurized fluid distribution lines, designed to feed their respective outlets with first and second hydraulic receivers.

Les circuits hydrauliques à deux pompes sont généralement utilisés pour alimenter des récepteurs comparables et destinés à être simultanément placés dans un état actif ou dans un état de repos.The two pump hydraulic circuits are generally used to power comparable receivers and intended to be simultaneously placed in an active state or in a state of rest.

Bien qu'il existe d'innombrables schémas de circuits hydrauliques, il reste difficile de concevoir un circuit hydraulique parfaitement adapté à son application, en particulier lorsque ce circuit doit être capable d'adopter plusieurs configurations à la fois différentes et non nécessairement symétriques.Although there are innumerable diagrams of hydraulic circuits, it remains difficult to design a hydraulic circuit perfectly suited to its application, especially when this circuit must be able to adopt several configurations that are both different and not necessarily symmetrical.

Dans ce contexte, la présente invention a pour but de proposer un circuit hydraulique répondant à ce besoin.In this context, the present invention aims to provide a hydraulic circuit that meets this need.

A cette fin, le circuit hydraulique de l'invention, par ailleurs conforme à la définition générique qu'en donne le préambule ci-dessus, est essentiellement caractérisé en ce que les première et deuxième lignes de distribution sont reliées l'une à l'autre par un noeud commun raccordé à la première pompe par un premier by-pass commandé, en ce que des première et deuxième électrovalves d'arrêt sont respectivement disposées sur les première et deuxième lignes entre leur noeud commun et les sorties respectives de ces première et seconde lignes, et en ce qu'un point de la deuxième ligne, intermédiaire entre la deuxième électrovalve et la sortie de la deuxième ligne, est raccordé à la deuxième pompe à travers un deuxième by-pass commandé, chaque by-pass commandé étant sélectivement placé dans une position active, dans laquelle le fluide traversant ce by-pass alimente au moins un récepteur, et dans une position de recirculation, dans laquelle le fluide traversant ce by-pass retourne au réservoir.For this purpose, the hydraulic circuit of the invention, moreover, conforms to the generic definition that gives the preamble above, is essentially characterized in that the first and second distribution lines are connected to one another by a common node connected to the first pump by a first controlled bypass, in that first and second stop solenoid valves are respectively arranged on the first and second lines between their common node and the respective outputs of these first and second lines, and in that a point of the second line, intermediate between the second solenoid valve and the output of the second line, is connected to the second pump through a second controlled bypass, each controlled bypass being selectively placed in an active position, in which the fluid passing through this bypass feeds at least one receiver, and in a recirculation position, in which the fluid passing through this bypass returns to the reservoir.

L'invention est particulièrement utile dans le cas où les première et deuxième pompes sont mécaniquement couplées l'une à l'autre.The invention is particularly useful in the case where the first and second pumps are mechanically coupled to each other.

Dans une mode de réalisation avantageux, il est en outre judicieux de faire en sorte que les première et deuxième pompes présentent respectivement des première et deuxième capacités de débit, et que la première capacité de débit soit supérieure à la deuxième.In an advantageous embodiment, it is also advisable to ensure that the first and second pumps respectively have first and second flow capacities, and that the first flow capacity is greater than the second.

De préférence, ce circuit hydraulique comporte en outre une première valve anti-retour, bloquante en direction de la première électrovalve, et disposée entre cette première électrovalve et ledit point intermédiaire, ainsi qu'une deuxième valve anti-retour, bloquante en direction du deuxième by-pass commandé, disposée entre ledit point intermédiaire et ce deuxième by-pass commandé.Preferably, this hydraulic circuit further comprises a first non-return valve, blocking towards the first solenoid valve, and disposed between this first solenoid valve and said intermediate point, and a second non-return valve, blocking towards the second controlled bypass, disposed between said intermediate point and second controlled bypass.

L'invention concerne par ailleurs l'utilisation d'un circuit hydraulique tel que précédemment décrit, pour l'actionnement sélectif d'une presse de compactage et d'un lève-conteneurs équipant un camion-benne mû par un moteur thermique également conçu pour actionner les pompes, caractérisée en ce que le premier récepteur comprend la presse de compactage, et en ce que le deuxième récepteur comprend le lève-conteneurs.The invention also relates to the use of a hydraulic circuit as previously described, for the selective actuation of a compacting press and a lifting device fitted to a dump truck driven by a heat engine also designed to operating the pumps, characterized in that the first receiver comprises the compacting press, and in that the second receiver comprises the container lifter.

Dans une telle utilisation, le circuit hydraulique est de préférence au moins commandé suivant une première configuration, dans laquelle le premier by-pass est en position active, dans laquelle le deuxième by-pass est en position de recirculation, dans laquelle la première électrovalve est en position bloquante, et dans laquelle la deuxième électrovalve est en position passante, le lève-conteneurs étant actionné alors que le camion-benne est à l'arrêt et que le moteur thermique tourne au ralenti.In such a use, the hydraulic circuit is preferably at least controlled according to a first configuration, in which the first bypass is in the active position, in which the second bypass is in the recirculation position, in which the first solenoid valve is in blocking position, and wherein the second solenoid valve is in the driving position, the hoist being operated while the dump truck is stopped and the engine is idling.

Dans l'utilisation envisagée, le circuit hydraulique peut de préférence aussi être au moins commandé suivant une deuxième configuration, dans laquelle le premier by-pass est en position active, dans laquelle le deuxième by-pass est en position de recirculation, dans laquelle la première électrovalve est en position passante, et dans laquelle la deuxième électrovalve est en position bloquante, cette deuxième configuration permettant d'actionner seule la presse de compactage lors du déplacement du camion-benne.In the envisaged use, the hydraulic circuit can also preferably be at least controlled according to a second configuration, in which the first bypass is in the active position, in which the second bypass is in the recirculation position, in which the first solenoid valve is in the driving position, and in which the second solenoid valve is in position blocking, this second configuration to operate alone compacting press when moving the dump truck.

Le circuit hydraulique peut avantageusement être aussi utilisé en étant au moins commandé suivant une troisième configuration, dans laquelle les premier et deuxième by-pass sont en position active, et dans laquelle les première et deuxième électrovalves sont en position passante, la presse de compactage et le lève-conteneurs étant actionnés alors que le camion-benne est à l'arrêt et que le moteur thermique tourne en régime accéléré.The hydraulic circuit can advantageously also be used while being at least controlled according to a third configuration, in which the first and second bypass are in the active position, and in which the first and second solenoid valves are in the driving position, the compacting press and the container lifter being actuated while the dump truck is stopped and that the engine is running in accelerated mode.

L'invention concerne encore un camion-benne caractérisé en ce qu'il utilise un circuit hydraulique tel que précédemment défini.The invention also relates to a dump truck characterized in that it uses a hydraulic circuit as previously defined.

D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence au dessin annexé dont la figure unique est un schéma du circuit hydraulique de l'invention, représenté dans sa première configuration.Other features and advantages of the invention will emerge clearly from the description which is given below, by way of indication and in no way limiting, with reference to the appended drawing, the single figure of which is a diagram of the hydraulic circuit of the invention, represented in its first configuration.

Comme annoncé précédemment, l'invention concerne notamment un circuit hydraulique comprenant, dans le mode de réalisation illustré, un réservoir RSV de fluide hydraulique, deux pompes P1 et P2, deux lignes de distribution de fluide sous pression L1 et L2, et deux récepteurs hydrauliques R1 et R2.As previously announced, the invention relates in particular to a hydraulic circuit comprising, in the illustrated embodiment, an RSV reservoir for hydraulic fluid, two pumps P1 and P2, two pressurized fluid distribution lines L1 and L2, and two hydraulic receivers. R1 and R2.

Dans son application privilégiée, ce circuit est monté sur un camion-benne mû par un moteur thermique et équipé d'une presse hydraulique de compactage formant le premier récepteur R1, et d'un lève-conteneurs hydraulique formant le deuxième récepteur R2.In its preferred application, this circuit is mounted on a dump truck driven by a heat engine and equipped with a hydraulic compacting press forming the first receiver R1, and a hydraulic container hoist forming the second receiver R2.

Les pompes P1 et P2, qui sont elles-mêmes entraînées par le moteur thermique du camion-benne et qui sont reliées au réservoir RSV pour y puiser le fluide hydraulique, sont mécaniquement couplées l'une à l'autre et sont en pratique constituées par deux étages de pompe intégrés dans un même corps de pompe.The pumps P1 and P2, which are themselves driven by the thermal engine of the dump truck and which are connected to the reservoir RSV to draw the hydraulic fluid, are mechanically coupled to one another and are in practice constituted by two pump stages integrated in the same pump body.

En outre, comme la figure le montre de façon symbolique par une différence de taille, la première pompe P1 présente une capacité de débit supérieure à la capacité de débit de la deuxième pompe P2, le rapport de ces capacités de débit étant par exemple de l'ordre de 2.In addition, as the figure symbolically shows by a difference in size, the first pump P1 has a flow capacity greater than the flow capacity of the second pump P2, the ratio of these flow capacities being, for example, order of 2.

Les lignes de distribution L1 et L2 sont reliées, par leurs extrémités respectives L1s et L2s, aux récepteurs R1 et R2 qu'ils alimentent sélectivement en fluide hydraulique sous pression.The distribution lines L1 and L2 are connected, by their respective ends L1s and L2s, to the receivers R1 and R2 which selectively supply hydraulic fluid under pressure.

Selon l'invention, ces lignes de distribution L1 et L2 sont reliées l'une à l'autre par un noeud commun N12, qui est lui-même raccordé à la première pompe P1 par un premier by-pass commandé BP1.According to the invention, these distribution lines L1 and L2 are connected to one another by a common node N12, which is itself connected to the first pump P1 by a first controlled bypass BP1.

Par ailleurs, des électrovalves d'arrêt EV1 et EV2 sont respectivement disposées sur les lignes L1 et L2, entre le noeud commun N12 de ces lignes et les sorties respectives L1s et L2s de ces mêmes lignes L1 et L2.Furthermore, stop solenoid valves EV1 and EV2 are respectively arranged on lines L1 and L2, between the common node N12 of these lines and the respective outputs L1s and L2s of these same lines L1 and L2.

Enfin, le point intermédiaire P12 de la deuxième ligne L2, qui est disposé entre la deuxième électrovalve EV2 et la sortie L2s de la deuxième ligne L2, est raccordé à la deuxième pompe P2 à travers un deuxième by-pass commandé BP2.Finally, the intermediate point P12 of the second line L2, which is arranged between the second solenoid valve EV2 and the output L2s of the second line L2, is connected to the second pump P2 through a second controlled bypass BP2.

Chacun des by-pass commandés BP1 et BP2 est placé à volonté soit dans une position active, dans laquelle le fluide traversant ce by-pass alimente l'un au moins des récepteurs R1 et R2, soit dans une position de recirculation, dans laquelle le fluide traversant ce by-pass retourne au réservoir RSV.Each of the controlled by-pass BP1 and BP2 is placed at will either in an active position, in which the fluid passing through this bypass feeds at least one of the receivers R1 and R2, or in a recirculation position, in which the fluid passing through this bypass returns to the RSV tank.

Ainsi, le by-pass BP1 illustré sur la figure est en position active, alors que le by-pass BP2 est en position de recirculation.Thus, the bypass BP1 illustrated in the figure is in the active position, while the bypass BP2 is in the recirculation position.

De préférence, comme le montre encore la figure, le circuit hydraulique comporte en outre une première valve anti-retour VAR1, bloquante en direction de la première électrovalve EV1, et disposée entre cette première électrovalve EV1 et le point intermédiaire PI2, ainsi qu'une deuxième valve anti-retour VAR2, bloquante en direction du deuxième by-pass commandé BP2, et disposée entre le point intermédiaire PI2 et ce deuxième by-pass commandé BP2.Preferably, as shown in the figure, the hydraulic circuit further comprises a first non-return valve VAR1, blocking towards the first solenoid valve EV1, and disposed between this first solenoid valve EV1 and the intermediate point PI2, and a second non-return valve VAR2, blocking towards the second controlled bypass BP2, and disposed between the intermediate point PI2 and second controlled bypass BP2.

Le circuit hydraulique ainsi conçu peut, sur commande, adopter plusieurs configurations avantageuses.The hydraulic circuit thus designed can, on command, adopt several advantageous configurations.

Dans la première configuration, illustrée à la figure, le premier by-pass BP1 est en position active, le deuxième by-pass BP2 est en position de recirculation, la première électrovalve EV1 est en position bloquante, et la deuxième électrovalve EV2 est en position passante.In the first configuration, illustrated in the figure, the first bypass BP1 is in the active position, the second bypass BP2 is in the recirculation position, the first solenoid valve EV1 is in the blocking position, and the second solenoid valve EV2 is in position bandwidth.

Dans ces conditions, le lève-conteneurs R2 se trouve actionné alors que le camion-benne est à l'arrêt et que le moteur thermique tourne au ralenti.Under these conditions, the R2 container lifter is operated while the dump truck is stopped and the engine is idling.

Dans la deuxième configuration, le premier by-pass BP1 est en position active, le deuxième by-pass BP2 est en position de recirculation, la première électrovalve EV1 est en position passante, et la deuxième électrovalve EV2 est en position bloquante.In the second configuration, the first bypass BP1 is in the active position, the second bypass LP2 is in the recirculation position, the first solenoid valve EV1 is in the conducting position, and the second solenoid valve EV2 is in the blocking position.

Cette deuxième configuration permet d'actionner seule la presse de compactage R1, aussi bien pendant que le camion-benne roule que pendant qu'il est à l'arrêt.This second configuration allows to operate alone compacting press R1, both while the dump truck rolls than while it is stopped.

Dans la troisième configuration, les premier et deuxième by-pass BP1 et BP2 sont en position active, et les première et deuxième électrovalves EV1 et EV2 sont en position passante.In the third configuration, the first and second bypass BP1 and BP2 are in the active position, and the first and second solenoid valves EV1 and EV2 are in the driving position.

Dans ces conditions, la presse de compactage R1 et le lève-conteneurs R2 sont actionnés ensemble alors que le camion-benne est à l'arrêt et que le moteur thermique tourne en régime accéléré.Under these conditions, the compaction press R1 and the R2 container lifter are actuated together while the dump truck is stopped and the engine is running in accelerated mode.

Claims (10)

Circuit hydraulique comprenant un réservoir (RSV) de fluide hydraulique, des première et deuxième pompes (P1, P2), et des première et deuxième lignes (L1, L2) de distribution de fluide sous pression, conçues pour alimenter par leurs sorties respectives (L1s, L2s) des premier et deuxième récepteurs hydrauliques (R1, R2), caractérisé en ce que les première et deuxième lignes de distribution (L1, L2) sont reliées l'une à l'autre par un noeud commun (N12) raccordé à la première pompe (P1) par un premier by-pass commandé (BP1), en ce que des première et deuxième électrovalves d'arrêt (EV1, EV2) sont respectivement disposées sur les première et deuxième lignes (L1, L2) entre leur noeud commun (N12) et les sorties respectives (L1s, L2s) de ces première et seconde lignes (L1, L2), et en ce qu'un point (P12) de la deuxième ligne (L2), intermédiaire entre la deuxième électrovalve (EV2) et la sortie (L2s) de la deuxième ligne (L2), est raccordé à la deuxième pompe (P2) à travers un deuxième by-pass commandé (BP2), chaque by-pass commandé (BP1, BP2) étant sélectivement placé dans une position active, dans laquelle le fluide traversant ce by-pass alimente au moins un récepteur, et dans une position de recirculation, dans laquelle le fluide traversant ce by-pass retourne au réservoir (RSV).Hydraulic circuit comprising a reservoir (RSV) of hydraulic fluid, first and second pumps (P1, P2), and first and second lines (L1, L2) for dispensing fluid under pressure, designed to feed through their respective outlets (L1s , L2s) of the first and second hydraulic receivers (R1, R2), characterized in that the first and second distribution lines (L1, L2) are connected to each other by a common node (N12) connected to the first pump (P1) by a first controlled bypass (BP1), in that first and second stop solenoid valves (EV1, EV2) are respectively arranged on the first and second lines (L1, L2) between their common node (N12) and the respective outputs (L1s, L2s) of these first and second lines (L1, L2), and in that a point (P12) of the second line (L2), intermediate between the second solenoid valve (EV2) and the output (L2s) of the second line (L2), is connected to the second pom pe (P2) through a second controlled bypass (BP2), each controlled bypass (BP1, BP2) being selectively placed in an active position, in which the fluid passing through this bypass feeds at least one receiver, and in a recirculation position, in which the fluid passing through this bypass returns to the tank (RSV). Circuit hydraulique suivant la revendication 1, caractérisé en ce que les première et deuxième pompes (P1, P2) sont mécaniquement couplées l'une à l'autre.Hydraulic circuit according to Claim 1, characterized in that the first and second pumps (P1, P2) are mechanically coupled to one another. Circuit hydraulique suivant l'une quelconque des revendications précédentes, caractérisé en ce que les première et deuxième pompes (P1, P2) présentent respectivement des première et deuxième capacités de débit, et en ce que la première capacité de débit est supérieure à la deuxième.Hydraulic circuit according to one of the preceding claims, characterized in that the first and second pumps (P1, P2) respectively have first and second flow capacities, and in that the first flow capacity is greater than the second. Circuit hydraulique suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre une première valve anti-retour (VAR1)D, bloquante en direction de la première électrovalve (EV1), et disposée entre cette première électrovalve (EV1) et ledit point intermédiaire (PI2).Hydraulic circuit according to any one of the preceding claims, characterized in that it further comprises a first non-return valve (VAR1) D, blocking towards the first solenoid valve (EV1), and arranged between this first solenoid valve (EV1 ) and said intermediate point (PI2). Circuit hydraulique suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre une deuxième valve anti-retour (VAR2), bloquante en direction du deuxième by-pass commandé (BP2), et disposée entre ledit point intermédiaire (PI2) et ce deuxième by-pass commandé (BP2).Hydraulic circuit according to any one of the preceding claims, characterized in that it furthermore comprises a second non-return valve (VAR2) blocking towards the second controlled bypass (BP2) and arranged between said intermediate point ( PI2) and this second controlled bypass (BP2). Utilisation d'un circuit suivant l'une quelconque des revendications précédentes, combinée aux revendications 2 et 3, pour l'actionnement sélectif d'une presse de compactage et d'un lève-conteneurs équipant un camion-benne mû par un moteur thermique également conçu pour actionner les pompes (P1, P2), caractérisée en ce que le premier récepteur (R1) comprend la presse de compactage, et en ce que le deuxième récepteur (R2) comprend le lève-conteneurs.Use of a circuit according to any one of the preceding claims, combined with claims 2 and 3, for the selective actuation of a compacting press and a lifting device fitted to a dump truck driven by a heat engine as well. designed to operate the pumps (P1, P2), characterized in that the first receiver (R1) comprises the compacting press, and in that the second receiver (R2) comprises the lifter. Utilisation suivant la revendication 6, caractérisée en ce que le circuit est au moins commandé suivant une première configuration, dans laquelle le premier by-pass (BP1) est en position active, dans laquelle le deuxième by-pass (BP2) est en position de recirculation, dans laquelle la première électrovalve (EV1) est en position bloquante, et dans laquelle la deuxième électrovalve (EV2) est en position passante, le lève-conteneurs (R2) étant actionné alors que le camion-benne est à l'arrêt et que le moteur thermique tourne au ralenti.Use according to Claim 6, characterized in that the circuit is at least controlled according to a first configuration, in which the first bypass (BP1) is in the active position, in which the second bypass (BP2) is in the position of recirculation, wherein the first solenoid valve (EV1) is in the blocking position, and wherein the second solenoid valve (EV2) is in the driving position, the hoist container (R2) being actuated while the dump truck is stopped and the engine is idling. Utilisation suivant l'une quelconque des revendications 6 à 7, caractérisée en ce que le circuit est au moins commandé suivant une deuxième configuration, dans laquelle le premier by-pass (BP1) est en position active, dans laquelle le deuxième by-pass (BP2) est en position de recirculation, dans laquelle la première électrovalve (EV1) est en position passante, et dans laquelle la deuxième électrovalve (EV2) est en position bloquante, cette deuxième configuration permettant d'actionner seule la presse de compactage (R1).Use according to any one of Claims 6 to 7, characterized in that the circuit is at least controlled according to a second configuration, in which the first bypass (BP1) is in the active position, in which the second bypass ( BP2) is in the recirculation position, in which the first solenoid valve (EV1) is in the driving position, and in which the second solenoid valve (EV2) is in the blocking position, this second configuration making it possible to actuate the compacting press (R1) alone. . Utilisation suivant l'une quelconque des revendications 6 à 8, caractérisée en ce que le circuit est au moins commandé suivant une troisième configuration, dans laquelle les premier et deuxième by-pass (BP1, BP2) sont en position active, et dans laquelle les première et deuxième électrovalves (EV1, EV2) sont en position passante, la presse de compactage (R1) et le lève-conteneurs (R2) étant actionnés alors que le camion-benne est à l'arrêt et que le moteur thermique tourne en régime accéléré.Use according to any one of Claims 6 to 8, characterized in that the circuit is at least controlled according to a third configuration, in which the first and second by-pass (BP1, BP2) are in the active position, and in which the first and second solenoid valves (EV1, EV2) are in the driving position, the compaction press (R1) and the container hoist (R2) being actuated while the dump truck is at a standstill and that the engine is running at an accelerated speed. Camion-benne, caractérisé en ce qu'il utilise un circuit hydraulique suivant l'une quelconque des revendications 1 à 5.Dump truck, characterized in that it uses a hydraulic circuit according to any one of claims 1 to 5.
EP10173294.9A 2009-09-23 2010-08-18 Hydraulic circuit with multiple configurations, apllication for a dump truck, and dump truck using such a circuit. Active EP2302221B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10173294T PL2302221T3 (en) 2009-09-23 2010-08-18 Hydraulic circuit with multiple configurations, apllication for a dump truck, and dump truck using such a circuit.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0956570A FR2950400B1 (en) 2009-09-23 2009-09-23 HYDRAULIC CIRCUIT HAVING SEVERAL CONFIGURATIONS, APPLICATION TO A DUMP TRUCK, AND DUMP TRUCK USING SUCH A CIRCUIT.

Publications (2)

Publication Number Publication Date
EP2302221A1 true EP2302221A1 (en) 2011-03-30
EP2302221B1 EP2302221B1 (en) 2013-05-01

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EP10173294.9A Active EP2302221B1 (en) 2009-09-23 2010-08-18 Hydraulic circuit with multiple configurations, apllication for a dump truck, and dump truck using such a circuit.

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EP (1) EP2302221B1 (en)
ES (1) ES2423208T3 (en)
FR (1) FR2950400B1 (en)
PL (1) PL2302221T3 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513967A1 (en) * 1985-04-18 1986-10-23 Mannesmann Rexroth GmbH, 8770 Lohr SAFETY ARRANGEMENT FOR PRIORITY HYDRAULIC CONSUMERS
US5163542A (en) * 1989-03-31 1992-11-17 Kabushiki Kaisha Komatsu Seisakusho Clutch actuating hydraulic circuit
DE4243578A1 (en) * 1992-12-22 1994-06-23 Faun Umwelttechnik Gmbh Hydraulic circuit for garbage truck
US20030198559A1 (en) * 2002-04-19 2003-10-23 Wayne Engineering Corporation Fluid system
JP2007191289A (en) * 2006-01-20 2007-08-02 Kayaba Ind Co Ltd Garbage collecting vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513967A1 (en) * 1985-04-18 1986-10-23 Mannesmann Rexroth GmbH, 8770 Lohr SAFETY ARRANGEMENT FOR PRIORITY HYDRAULIC CONSUMERS
US5163542A (en) * 1989-03-31 1992-11-17 Kabushiki Kaisha Komatsu Seisakusho Clutch actuating hydraulic circuit
DE4243578A1 (en) * 1992-12-22 1994-06-23 Faun Umwelttechnik Gmbh Hydraulic circuit for garbage truck
US20030198559A1 (en) * 2002-04-19 2003-10-23 Wayne Engineering Corporation Fluid system
JP2007191289A (en) * 2006-01-20 2007-08-02 Kayaba Ind Co Ltd Garbage collecting vehicle

Also Published As

Publication number Publication date
EP2302221B1 (en) 2013-05-01
PL2302221T3 (en) 2013-10-31
FR2950400A1 (en) 2011-03-25
FR2950400B1 (en) 2011-09-30
ES2423208T3 (en) 2013-09-18

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