A HYDRAULIC VALVE ARRANGEMENT
The present disclosure relates to a hydraulic valve arrangement comprising a first pilot operated proportional directional control valve (10) having a first valve member (11) that is displaceable in a first and a second axial direction (12, 13) for controlling direction of supply and discharge of hy...
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Format: | Patent |
Sprache: | eng ; fre |
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Zusammenfassung: | The present disclosure relates to a hydraulic valve arrangement comprising a first pilot operated proportional directional control valve (10) having a first valve member (11) that is displaceable in a first and a second axial direction (12, 13) for controlling direction of supply and discharge of hydraulic fluid to and from a hydraulic actuator (60), a first proportional electro-hydraulic control valve (30) for controlling displacement of the first valve member (11) in the first axial direction (12), a second proportional electro-hydraulic control valve (40) for controlling displacement of the first valve member (11) in the second axial direction (13), and a second pilot operated proportional control valve (20) having a second valve member (21) configured to be controlled by the first and second proportional electro-hydraulic control valves (30, 40) via a shuttle valve arrangement (50). Individual meter-in and meter-out control of the hydraulic actuator (60) is providable by having the second pilot operated proportional control valve (20) configured to operate as a meter-in valve of the hydraulic actuator (60) and the first pilot operated proportional directional control valve (10) configured to operate as a meter-out valve of the hydraulic actuator (60), or by having the first pilot operated proportional directional control valve (10) configured to operate as a meter-in valve of the hydraulic actuator (60) and the second pilot operated proportional control valve (20) configured to operate as a meter-out valve of the hydraulic actuator (60). The present disclosure also relates to a vehicle comprising a hydraulic actuator (60)and a hydraulic valve arrangement (1) for controlling the motion of the hydraulic actuator (60).
La présente invention concerne un agencement de vannes hydrauliques comprenant une première vanne de commande directionnelle proportionnelle (10) actionnée par pilote et comportant un premier élément (11) de vanne pouvant être déplacé dans une première et une seconde direction axiale (12, 13) afin de commander la direction d'alimentation d'un fluide hydraulique vers un actionneur hydraulique (60) et sa direction d'évacuation à partir de ce dernier, une première vanne de commande électro-hydraulique proportionnelle (30) servant à commander le déplacement du premier élément (11) de vanne dans la première direction axiale (12), une seconde vanne de commande électro-hydraulique proportionnelle (40) servant à commander le déplacement du premier |
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