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    • 15. 发明申请
    • METHODS AND APPARATUS TO ENABLE BOOM BOUNCE REDUCTION AND PREVENT UN-COMMANDED MOTION IN HYDRAULIC SYSTEMS
    • 实现液压系统降低动力和防止未命令运动的方法和设备
    • WO2016011193A1
    • 2016-01-21
    • PCT/US2015/040636
    • 2015-07-15
    • EATON CORPORATION
    • WANG, MengRANNOW, Michael Berne
    • E04G21/04
    • F15B21/008B66C13/066E04G21/0454F15B11/003F15B11/042F15B11/0445F15B19/005F15B2211/30515F15B2211/3057F15B2211/329F15B2211/355F15B2211/50509F15B2211/5059F15B2211/526F15B2211/6313F15B2211/632F15B2211/634F15B2211/6658F15B2211/855F15B2211/8616F15B2211/8636F15B2211/8752F16K31/426
    • A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second independent control valves (700, 800), and first and second blocking valves (350, 450). The actuator includes first and second corresponding chambers. In a first mode, the second counter-balance valve is opened by the first control valve, and the first counter-balance valve is opened by the second control valve. In a second mode, at least one of the counter-balance valves is closed. A meter-out control valve (800, 700) may be operated in a flow control mode, and/or a meter-in control valve (700, 800) may be operated in a pressure control mode. Boom dynamics reduction may occur while the boom is in motion (e.g., about a worksite). By opening the counter-balance valves, sensors at the control valves may be used to characterize external loads. The control valves may respond to the external loads and at least partially cancel unwanted boom dynamics. The system may further detecting faults in actuators with counter-balance valves and prevent any single point fault from causing a boom falling event and/or mitigate such faults.
    • 在提供平衡阀保护的同时提供悬臂(30)的起重臂动力学的液压系统(600)和方法包括液压致动器(110),第一和第二平衡阀(300,400),第一和第二平衡阀 第二独立控制阀(700,800)以及第一和第二阻塞阀(350,450)。 致动器包括第一和第二相应的腔室。 在第一模式中,第二反平衡阀由第一控制阀打开,第一反平衡阀由第二控制阀打开。 在第二模式中,至少一个平衡阀关闭。 输出控制阀(800,700)可以以流量控制模式操作,和/或计量控制阀(700,800)可以在压力控制模式下操作。 在动臂运动时(例如,围绕工地),可能会发生动力学下降。 通过打开平衡阀,控制阀上的传感器可用于表征外部负载。 控制阀可以响应外部负载,并且至少部分地消除不期望的起重臂动力。 该系统可以进一步检测具有反平衡阀的致动器中的故障,并且防止任何单点故障引起吊杆下落事件和/或减轻这种故障。