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JP2011137547A Negative control type hydraulic system 有权
标题翻译：负控制型液压系统
公开(公告)号：JP2011137547A
公开(公告)日：2011-07-14
申请号：JP2010292412
申请日：2010-12-28
申请人： Volvo Construction Equipment Ab , ボルボコンストラクションイクイップメントアーベー
发明人： CHOENG HAE KYUN
IPC分类号： F15B11/08 , F15B11/00
CPC分类号： E02F9/2232 , E02F9/2285 , E02F9/2296 , F04B49/08 , F15B11/055 , F15B2211/20546 , F15B2211/3116 , F15B2211/625 , F15B2211/6355
摘要： PROBLEM TO BE SOLVED: To provide a negative control type hydraulic system eliminating the necessity of using a pilot pump, preventing power loss and eliminating the necessity of using a load pressure generator between a hydraulic pump and a control valve. SOLUTION: The negative control type hydraulic system includes: the hydraulic pump connected to an engine; a hydraulic actuator connected to the hydraulic pump; switching valves controlling a flow of working fluid supplied to the hydraulic actuator; pilot signal pressure generating means installed on a downstream side of a center bypass passage of the hydraulic pump; an operation lever outputting signal pressure in proportion to a manipulation amount; and a pressure reducing valve installed in a pilot flow passage having one end branched and connected to the center bypass passage and the other end connected to an input port of the operation lever, and controlling working fluid supplied through the pilot flow passage when the operation lever is manipulated so that the working fluid from the hydraulic pump can be used as the signal pressure according to the manipulation of the operation lever. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种负控制型液压系统，消除了使用先导泵的必要性，防止功率损耗并且消除了在液压泵和控制阀之间使用负载压力发生器的必要性。解决方案：负控制型液压系统包括：液压泵连接到发动机; 连接到液压泵的液压致动器; 控制供给液压致动器的工作流体的流动的切换阀; 导向信号压力产生装置，安装在液压泵的中心旁路通道的下游侧; 操作杆，与操作量成比例地输出信号压力; 以及安装在先导流路中的减压阀，其一端分支连接到中心旁通通道，另一端连接到操作杆的输入端口，并且当操作杆操作时控制通过先导流路供给的工作流体被操作，使得来自液压泵的工作流体可以用作根据操作杆的操纵的信号压力。版权所有（C）2011，JPO＆INPIT

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