| 摘要 |
PURPOSE: A hydraulic circuit for construction equipment with a swing device is provided to optimize the relative speed of a swing device by variously controlling the torque of the device. CONSTITUTION: A hydraulic circuit for construction equipment with a swing device comprises variable capacity first and second hydraulic pumps(1,2), a boom cylinder(3), a boom control valve(6), a variable capacity swing motor(19), a swing control valve(13), a variable relief valve, boom joysticks(15), a swing joystick(16), and a main relief valve(17). The boom control valve controls the boom cylinder. The swing control valve controls the swing motor. The boom joysticks supply control pressure to the swing control valve. The swing joystick supplies control pressure to the swing control valve. The main relief valve returns hydraulic fluid to a hydraulic tank. |
