| 摘要 |
An oil pressure control apparatus of an excavator is provided to prevent the fluid of a swing hydraulic motor and an option hydraulic motor from being excessively supplied by differently forming the pumps supplying power to the swing hydraulic motor and the option hydraulic motor. In an oil pressure control apparatus of an excavator includes a first hydraulic pump(110), a second hydraulic pump(120), and a third hydraulic pump(130). A boom control valve(112) supplying a hydraulic pressure to a boom actuator and a right travel control valve(111) are connected to the first hydraulic pump in parallel. A rotation option control valve(121), a grip option control valve(124), and a left travel control valve(127) are connected to the second hydraulic valve in parallel. A swing control valve(131) supplying a hydraulic pressure to a swing hydraulic motor is connected to the third hydraulic pump. |
