| 摘要 |
PURPOSE: A sudden turning prevention hydraulic system for a construction machine is provided to prevent the reduction of working speed by employing a circular circuit in which a main pump is connected to the junction of a straight driving valve in driving and front operation. CONSTITUTION: A sudden turning prevention hydraulic system for a construction machine comprises main pumps(100,101), a first pump(105), a second pump(110), a turning control valve(115), a straight driving valve(125), and a turning hydraulic line(116). The main pumps drive a driving motor and a front working machine. The first pump drives a turning motor. The second pump provides pilot signal pressure. The turning control valve comprises a hydraulic line connected to the first pump and controls the turning motor through a plurality of positions. The straight driving valve comprises a junction position(126) and a connection location(127). The turning hydraulic line connects the running control valve to a hydraulic line connecting the first pump and the straight driving valve.
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