INDEPENDENT FLOW RATE CONTROLLING HYDRAULIC SYSTEM FOR PRESSURE CONTROL OF EXCAVATOR AND INDEPENDENT HYDRAULIC PRESSURE CONTROLLING METHOD USING THE SAME
    1.
    发明申请
    INDEPENDENT FLOW RATE CONTROLLING HYDRAULIC SYSTEM FOR PRESSURE CONTROL OF EXCAVATOR AND INDEPENDENT HYDRAULIC PRESSURE CONTROLLING METHOD USING THE SAME 审中-公开
    独立流量控制液压系统用于压力控制和独立液压控制方法

    公开(公告)号:US20150082782A1

    公开(公告)日:2015-03-26

    申请号:US14555973

    申请日:2014-11-28

    IPC分类号: F15B11/16 E02F9/22

    摘要: An independent flow rate controlling hydraulic system for pressure control of an excavator, in which a hydraulic system of the excavator can be variably controlled via independent flow rate control. The hydraulic system includes a plurality of actuators which actuate a working apparatus, a pressure control-type hydraulic pump which feeds working fluid to the actuator, first and second electronic proportional control valves which are disposed at a piston-side inlet flow path and a load-side inlet flow path connected from the hydraulic pump to the actuators, third and fourth electronic proportional control valves which are disposed at a piston-side outlet flow path and a load-side outlet flow path connected from the actuators to a hydraulic tank, and a control unit which variably controls areas of the flow paths by controlling the first, second, third and fourth electronic proportional control valves depending on an amount by which a control stick is manipulated.

    摘要翻译: 用于挖掘机的压力控制的独立流量控制液压系统,其中挖掘机的液压系统可以通过独立的流量控制被可变地控制。 液压系统包括多个致动器,致动器致动工作装置;压力控制型液压泵,其将工作流体输送到致动器;第一和第二电子比例控制阀,其设置在活塞侧入口流动路径和负载 从液压泵连接到致动器的第三和第四电子比例控制阀,设置在从致动器连接到液压缸的活塞侧出口流动路径和负载侧出口流动路径上的第三和第四电子比例控制阀,以及 控制单元,其通过根据控制棒的操作量控制第一,第二,第三和第四电子比例控制阀来可变地控制流路的区域。