JOINING CIRCUIT FOR HYDRAULIC DEVICE

PROBLEM TO BE SOLVED: To eliminate such problems that the use of a pair of spool type directional control valves for a joining circuit causes the installation site of a hydraulic valve device to be larger and work requiring accuracy to be more cumbersome.SOLUTION: The joining circuit includes a dire...

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Bibliographische Detailangaben
Hauptverfasser:	KANENAWA HIRONARI, IMOTO SHUHEI, MINE GENTA, YASUTOMI TAKEHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR DREDGING FIXED CONSTRUCTIONS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS FOUNDATIONS HEATING HYDRAULIC ENGINEERING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SOIL SHIFTING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To eliminate such problems that the use of a pair of spool type directional control valves for a joining circuit causes the installation site of a hydraulic valve device to be larger and work requiring accuracy to be more cumbersome.SOLUTION: The joining circuit includes a directional control valve 8 for joining discharge oil from a first pump 2 and that from a second pump 4 and supplying/discharging them to an actuator 6, and a controller 10. The directional control valve includes a center bypass oil path 14 connected to discharge oil paths of the first pump and the second pump, a first parallel supply oil path 16 connected to the discharge oil path of the first pump, and a second parallel supply oil path 20 connected to the discharge oil path of the second pump and connected to the first parallel oil path via a poppet type flow control valve 18. The poppet type flow control valve controls a flow so as to be a predetermined amount depending on a signal from the controller.