Hydraulic Load-Sensing Control Arrangement
    3.
    发明申请
    Hydraulic Load-Sensing Control Arrangement 有权
    液压负荷传感控制装置

    公开(公告)号:US20150013319A1

    公开(公告)日:2015-01-15

    申请号:US14382252

    申请日:2013-02-27

    申请人: Robert Bosch GmbH

    IPC分类号: F15B13/02

    摘要: A hydraulic load-sensing control arrangement for a first and second hydraulic consumer has a variable displacement pump having load-sensing regulation, to which the highest respective load-sensing pressure of consumers is reported. The first consumer has the highest load pressure in normal operation and therefore the highest load-sensing pressure dependent on the load pressure. A pressure reducing valve is arranged in the pressure medium flow path between the variable displacement pump and the first consumer. A spring force from a regulating spring and a regulating pressure dependent on the load pressure of the first consumer are applied in the opening direction of a valve gate in this pressure reducing valve and pressure is applied directly downstream from the pressure reducing valve in the closing direction thereof. A pressure equivalent of the spring force of the regulating spring and the regulating pressure are greater than a pressure of the variable displacement pump.

    摘要翻译: 用于第一和第二液压消耗器的液压负载感测控制装置具有具有负载感测调节的可变排量泵,报告消费者的最高各自的负载感测压力。 第一消费者在正常运行中具有最高的负载压力,因此最高负载感测压力取决于负载压力。 在可变排量泵和第一使用者之间的压力介质流动路径中设置减压阀。 在该减压阀的阀门的打开方向上施加来自调节弹簧的弹簧力和取决于第一消耗器的负载压力的调节压力,并且在关闭方向上直接在减压阀的下游施加压力 其中。 与调节弹簧的弹簧力和调节压力相当的压力大于可变排量泵的压力。

    WORK MACHINE
    5.
    发明申请
    WORK MACHINE 有权
    工作机器

    公开(公告)号:US20140208734A1

    公开(公告)日:2014-07-31

    申请号:US14239361

    申请日:2012-12-11

    发明人: Hiroshi Horii

    IPC分类号: F15B13/02 F15B7/00

    摘要: Provided is a load sensing system for controlling a discharge pressure of the hydraulic pump so as to render a differential pressure obtained by subtracting a maximum load pressure among the hydraulic actuators from a discharge pressure of the hydraulic pump to be a constant pressure, and there are provided: a first load pressure flow passage which introduces load pressures of the hydraulic actuators to be outputted to a PLS transmission line which transmits the maximum load pressure among the hydraulic actuators at the time of activating the hydraulic actuators; and a second load pressure flow passage which is a flow path for introducing the load pressures of the hydraulic actuators to be outputted to the PLS transmission line during operation after activations of the hydraulic actuators, and wherein a flow rate of the pressure oil therein is reduced than that in the first load pressure flow passage.

    摘要翻译: 提供了一种用于控制液压泵的排出压力的负载感测系统,以便通过从液压泵的排出压力减去液压致动器中的最大负载压力而获得的压差为一定压力,并且存在 提供:第一负载压力流路,其将要输出的液压致动器的负载压力引导到在启动液压致动器时在液压致动器之间传递最大负载压力的PLS传输线; 以及第二负载压力流路,其是在液压致动器激活之后的操作期间将用于输出到PLS传输线的液压致动器的负载压力引入的流路,并且其中压力油的流量减小 比第一负载压力流通道中的流量高。

    HYDRAULIC SYSTEM HAVING AN EXTERNAL PRESSURE COMPENSATOR
    7.
    发明申请
    HYDRAULIC SYSTEM HAVING AN EXTERNAL PRESSURE COMPENSATOR 有权
    具有外压补偿器的液压系统

    公开(公告)号:US20100107623A1

    公开(公告)日:2010-05-06

    申请号:US12605465

    申请日:2009-10-26

    IPC分类号: F15B13/042

    摘要: A hydraulic system for a machine is disclosed. The hydraulic system has a source of pressurized fluid and a fluid actuator with a first chamber. The hydraulic system also has a first valve configured to selectively fluidly communicate the source with the first chamber. The first valve further includes a first element movable between a flow passing, at which fluid from the source flows to the first chamber, and a flow blocking position, at which fluid from the source is blocked from the first chamber and a second element configured to selectively drain a control passageway associated with the first element to cause the first element to move. The hydraulic system further has a proportional pressure compensating valve configured to control a pressure of a fluid directed between the source and the first valve dependent upon the pressure of the control passageway.

    摘要翻译: 公开了一种用于机器的液压系统。 液压系统具有加压流体源和具有第一室的流体致动器。 液压系统还具有构造成选择性地将源与第一室流体连通的第一阀。 第一阀还包括第一元件,第一元件可以在通过流体之间移动,流体从源流出到第一室,流动阻挡位置在该流动阻挡位置处,来自源的流体被阻挡在第一室中,第二元件被配置为 选择性地排出与第一元件相关联的控制通道以使第一元件移动。 液压系统还具有比例压力补偿阀,该比例压力补偿阀被配置为根据控制通道的压力来控制引导在源和第一阀之间的流体的压力。

    HYDRO-PNEUMATIC SYSTEM WITH PRESSURE LIMITING VALVE
    8.
    发明申请
    HYDRO-PNEUMATIC SYSTEM WITH PRESSURE LIMITING VALVE 有权
    带压力限位阀的水力气动系统

    公开(公告)号:US20100104456A1

    公开(公告)日:2010-04-29

    申请号:US12446611

    申请日:2007-10-25

    IPC分类号: F04B17/00 F16K15/00

    摘要: A hydro-pneumatic system has an air powered motor driving a hydraulic pump with a pressure limiting valve that turns off air flow to the air motor when a hydraulic pressure output by the pump at a sense port of the valve reaches a certain limit. A valve element of the valve has spring, hydraulic and pneumatic sections, with an unbalanced area of the hydraulic section in a sealed pressure chamber of a cartridge that is part of the valve housing. The pneumatic section extends out one end of the cartridge to fill a bore between the air inlet and outlet ports when the pneumatic section is extended, and allow air to pass when it is retracted.

    摘要翻译: 液压气动系统具有驱动液压泵的空气动力马达,该液压泵具有压力限制阀,当在阀的感应端口处的泵输出的液压压力达到一定限度时,该压力限制阀将空气流向空气马达。 阀的阀元件具有弹簧,液压和气动部分,在作为阀壳体的一部分的盒的密封压力室中具有液压部分的不平衡区域。 当气动部分延伸时,气动部分延伸出筒的一端以填充空气入口和出口之间的孔,并允许空气在其缩回时通过。

    Anti-Saturation Valve Assembly for Load Sensing Hydraulic System
    9.
    发明申请
    Anti-Saturation Valve Assembly for Load Sensing Hydraulic System 有权
    用于负载传感液压系统的抗饱和阀组件

    公开(公告)号:US20080245064A1

    公开(公告)日:2008-10-09

    申请号:US11658134

    申请日:2005-07-22

    申请人: Isidoro Livraghi

    发明人: Isidoro Livraghi

    IPC分类号: F15B11/00 F15B11/16

    摘要: An anti-saturation valve assembly (51) for use in a hydraulic system having priority (17) and auxiliary (25) load circuits, the priority circuit providing a priority load signal (19). The anti-saturation valve assembly includes a pressure sensor portion (61) which senses a decrease between pump pressure (23) and the priority load signal (19), and generates a force on a pressure reducing portion (63) to reduce, correspondingly, a pilot pressure (59): The reduced pilot pressure to a pilot valve (35) results in reduced flow to a pilot-operated main control valve (27) in the auxiliary load circuit (25), thus providing anti-saturation protection for the circuit, without throttling a main flow path and wasting substantial hydraulic power.

    摘要翻译: 一种用于具有优先级(17)和辅助(25)负载电路的液压系统的抗饱和阀组件(51),所述优先电路提供优先级负载信号(19)。 抗饱和阀组件包括压力传感器部分(61),其感测泵压力(23)和优先级负载信号(19)之间的减小,并且在减压部分(63)上产生力, 先导压力(59):向先导阀(35)的先导压降低导致辅助负载回路(25)中先导操作的主控制阀(27)的流量减少,从而为 电路,而不会节流主流路并浪费大量的液压功率。

    Hydraulic system for a working machine that comprises a special consumer
    10.
    发明申请
    Hydraulic system for a working machine that comprises a special consumer 审中-公开
    包括特殊消费者的工作机液压系统

    公开(公告)号:US20030140626A1

    公开(公告)日:2003-07-31

    申请号:US10332855

    申请日:2003-01-14

    IPC分类号: F16D031/02

    摘要: A hydraulic system for excavators or other working machines, comprising a branching device for feeding special consumers with particularly high power consumption. The special consumer is supplied with priority until a maximum supply level is reached, which is lower than the maximum output of the hydraulic source. The remaining output difference is made available without restriction to the other consumers in the hydraulic system, wherein the distribution of the remaining flow of hydraulic fluid is not influenced. Thus, the operating ability of the machine equipped with the hydraulic system is maintained completely and in the standard manner. Any possible slow-down of the adjustment movement of a consumer is reflected proportionally in the movements of all other consumers, so that the ratios of the operating speeds or reaction speeds of the individual consumers among themselves remain the same.

    摘要翻译: 一种用于挖掘机或其他工作机械的液压系统,包括用于给特殊消费者提供特别高的功率消耗的分支装置。 特殊消费者优先供应,直到达到最大供应水平,低于液压源的最大输出量。 剩余的输出差异在液压系统中不受其他消费者限制的情况下可用,其中液压流体的剩余流量的分布不受影响。 因此,配备有液压系统的机器的操作能力完全地以标准方式保持。 消费者的调整运动的任何可能的减速反映在所有其他消费者的运动中成比例地反映,使得个体消费者的运行速度或反应速度之间的比例保持不变。