Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
VALVE UNIT AND VALVE EQUIPMENT
A valve unit according to one embodiment includes valve equipment and control circuitry. The valve equipment includes a spool valve and a poppet-type logic valve. The spool valve switches a direction of supply and discharge of hydraulic oil to and from a hydraulic actuator. The logic valve is located between the spool valve and a hydraulic pump. The control circuitry controls the spool valve and the logic valve, such that if a supply flow rate of the hydraulic oil to the hydraulic actuator is less than a predetermined value, an opening area of a meter-in passage of the spool valve is less than an opening area of the logic valve, whereas if the supply flow rate of the hydraulic oil to the hydraulic actuator is greater than the predetermined value, the opening area of the meter-in passage of the spool valve is greater than the opening area of the logic valve.
VALVE UNIT AND VALVE EQUIPMENT
A valve unit according to one embodiment includes valve equipment and control circuitry. The valve equipment includes a spool valve and a poppet-type logic valve. The spool valve switches a direction of supply and discharge of hydraulic oil to and from a hydraulic actuator. The logic valve is located between the spool valve and a hydraulic pump. The control circuitry controls the spool valve and the logic valve, such that if a supply flow rate of the hydraulic oil to the hydraulic actuator is less than a predetermined value, an opening area of a meter-in passage of the spool valve is less than an opening area of the logic valve, whereas if the supply flow rate of the hydraulic oil to the hydraulic actuator is greater than the predetermined value, the opening area of the meter-in passage of the spool valve is greater than the opening area of the logic valve.
VALVE UNIT AND VALVE EQUIPMENT
AOKI SEIJI (Autor:in) / TODE YOSHIYUKI (Autor:in) / OHIRA MASAHIRO (Autor:in)
01.02.2024
Patent
Elektronische Ressource
Englisch
IPC:
E02F
Baggern
,
DREDGING