SELF-BLEEDING, SELF-PRIMING, REVERSIBLE CIRCUIT
    4.
    发明申请
    SELF-BLEEDING, SELF-PRIMING, REVERSIBLE CIRCUIT 审中-公开
    自拍,自拍,可逆电路

    公开(公告)号:US20160319807A1

    公开(公告)日:2016-11-03

    申请号:US15002739

    申请日:2016-01-21

    IPC分类号: F04B17/03 F16K15/18 F16K3/26

    摘要: A hydraulic power unit for controlling a work unit includes a reservoir for storing hydraulic fluid, a hydraulic pump for moving fluid from the reservoir, a prime mover for driving the hydraulic pump, and a manifold for controlling flow between the work unit, pump and reservoir. The manifold includes a spool valve assembly with a spool that is translatable within a spool bore to provide this control. The spool bore is fluidly connected to the work unit via a pair of work passages, to the hydraulic pump via a pair of supply passages, and to the reservoir via a return passage. The manifold is configured to direct fluid flow received from the work unit at either of the work passages to the reservoir while bypassing the pump by preventing fluid flow through the spool bore in a direction from either of the work passages to either of the supply passages.

    摘要翻译: 用于控制工作单元的液压动力单元包括用于存储液压流体的储存器,用于从储存器移动流体的液压泵,用于驱动液压泵的原动机,以及用于控制工作单元,泵和储存器之间的流动的歧管 。 歧管包括具有阀芯的滑阀组件,阀芯可在阀芯孔内平移以提供该控制。 滑阀孔经由一对工作通道经由一对供给通道流体地连接到工作单元,通过一对供给通道连接到液压泵,并且经由返回通道到达储存器。 歧管构造成将通过工作单元接收的流体流引导到储存器,同时通过防止流体在从任一个工作通道到任一个供给通道的方向流过阀芯孔而绕过泵。

    HYDRAULIC SYSTEM
    5.
    发明申请
    HYDRAULIC SYSTEM 有权
    液压系统

    公开(公告)号:US20160090997A1

    公开(公告)日:2016-03-31

    申请号:US14495960

    申请日:2014-09-25

    发明人: Thomas Johnson

    IPC分类号: F15B11/028

    摘要: A hydraulic system is provided, the hydraulic system including a hydraulic load defining a first chamber and a second chamber. Additionally, the hydraulic system includes a pressure source, a fluid storage vessel, a load sense line, and a spool valve. The spool valve fluidly connects the fluid storage vessel to one of the first or second chambers and fluidly connects the pressure source to the other of the first or second chambers. A bypass line is also provided defining a flow path between the hydraulic load and the fluid storage vessel that bypasses the spool valve. Fluid flow may encounter less resistance through the bypass line, such that the hydraulic system may run more efficiently and with a reduced risk for cavitation in the hydraulic load.

    摘要翻译: 提供了液压系统,液压系统包括限定第一室和第二室的液压负载。 此外,液压系统包括压力源,流体存储容器,负载感测线和滑阀。 滑阀将流体存储容器流体地连接到第一或第二腔室中的一个,并将压力源流体地连接到第一或第二腔室中的另一个。 还提供了旁路管线,其限定了绕过滑阀的液压负载和流体存储容器之间的流动路径。 流体流动可能通过旁路管线遇到较小的阻力,使得液压系统可以更有效地运行并且降低液压负载中的空化风险。

    Hydraulic Control Device for Work Machine
    6.
    发明申请
    Hydraulic Control Device for Work Machine 审中-公开
    工作机液压控制装置

    公开(公告)号:US20150300378A1

    公开(公告)日:2015-10-22

    申请号:US14441048

    申请日:2013-11-05

    IPC分类号: F15B11/028 E02F9/22

    摘要: The energy efficiency is increased by reducing the throttle/relief loss in the delivery flow of the hydraulic pump caused by the bleed-off control, while also making it possible to control the delivery pressure of the hydraulic pump according to the operation amount of the control lever unit and improving the operational performance. A controller 6 includes a target pump pressure setting unit 32 which calculates a target pump delivery pressure which increases with the increase in an operation amount signal from an operation amount detector 20A/20B based on the operation amount signal and a pump flow rate upper limit setting unit 33 which calculates a pump flow rate upper limit which increases with the increase in the operation amount signal based on the operation amount signal. The tilt amount of the hydraulic pump 2 is controlled based on the target pump delivery pressure calculated by the target pump pressure setting unit 32, the pump flow rate upper limit calculated by the pump flow rate upper limit setting unit 33, and the delivery pressure of the hydraulic pump 2 detected by a pressure detector 21.

    摘要翻译: 通过减少由排出控制引起的液压泵的输送流量中的节流/减压损失,能够提高能量效率,同时还可以根据控制的操作量来控制液压泵的输送压力 杠杆单元,提高操作性能。 控制器6包括目标泵压力设定单元32,该目标泵压力设定单元32基于操作量信号和泵流量上限设定来计算随着来自操作量检测器20A / 20B的操作量信号的增加而增加的目标泵输送压力 单元33,其基于操作量信号计算随着操作量信号的增加而增加的泵流量上限。 基于由目标泵压力设定单元32计算出的目标泵输送压力,由泵流量上限设定单元33计算的泵流量上限,以及泵流量上限设定单元33的输出压力来控制液压泵2的倾斜量 液压泵2由压力检测器21检测。