PRESSURE PEAK REDUCTION VALVE FOR EXCAVATOR AND PRESSURE PEAK REDUCTION SYSTEM FOR EXCAVATOR COMPRISING SAME
    3.
    发明申请
    PRESSURE PEAK REDUCTION VALVE FOR EXCAVATOR AND PRESSURE PEAK REDUCTION SYSTEM FOR EXCAVATOR COMPRISING SAME 审中-公开
    用于包括其的挖掘机的用于挖掘机和压力减小系统的压力减小阀

    公开(公告)号:US20160326721A1

    公开(公告)日:2016-11-10

    申请号:US15108311

    申请日:2014-12-12

    摘要: The present disclosure provides a pressure peak reduction valve for an excavator. The pressure peak reduction valve includes at least: a poppet seat which has an inlet port, and at least one communication hole which communicates with a hydraulic tank and is formed in an outer circumferential surface of the poppet seat; a main poppet which slides in the poppet seat; a poppet spring which is provided in the main poppet; a valve seat which has one end portion inserted into the main poppet so as to be in contact with one end portion of the poppet spring; a cone which is provided to be inserted into an openable hole formed at an end portion of the valve seat; an adjustment screw which is provided in the valve seat; and a piston which slides in the adjustment screw.

    摘要翻译: 本公开提供了一种用于挖掘机的压力峰值减小阀。 所述压力峰值减压阀至少包括:具有入口的提升阀座和与所述提升阀座的外周面形成的至少一个与液压箱连通的连通孔; 在提升阀座上滑动的主支座; 提供在主提升阀中的提升阀弹簧; 阀座,其具有插入主提升阀中的一个端部以与提升阀弹簧的一个端部接触; 锥体,其被设置成插入形成在所述阀座的端部处的可打开孔中; 设置在阀座中的调节螺钉; 以及在调节螺钉中滑动的活塞。

    AIRCRAFT HYDRAULIC FLUID HEATING SYSTEM AND METHOD
    5.
    发明申请
    AIRCRAFT HYDRAULIC FLUID HEATING SYSTEM AND METHOD 审中-公开
    飞机液压加热系统及方法

    公开(公告)号:US20160069362A1

    公开(公告)日:2016-03-10

    申请号:US14840073

    申请日:2015-08-31

    IPC分类号: F15B21/04 F24H9/20 F24H1/00

    摘要: An aircraft hydraulic fluid heating system and method are disclosed. In one embodiment, pump characteristics of a hydraulic pump coupled to a reservoir are obtained. Further, total demand of the hydraulic fluid for hydraulically controlled flight controls in the aircraft is determined. Furthermore, the hydraulic fluid in the reservoir is dynamically heated based on the pump characteristics and the total demand of the hydraulic fluid.

    摘要翻译: 公开了一种飞机液压流体加热系统和方法。 在一个实施例中,获得耦合到储存器的液压泵的泵特性。 此外,确定飞机中用于液压控制飞行控制的液压流体的总需求。 此外,基于泵的特性和液压流体的总需求,蓄能器中的液压流体被动态地加热。

    Electro-hydraulic load sense on a power machine
    9.
    发明申请
    Electro-hydraulic load sense on a power machine 审中-公开
    动力机器上的液压负载感

    公开(公告)号:US20020070071A1

    公开(公告)日:2002-06-13

    申请号:US09733110

    申请日:2000-12-08

    发明人: Scott N. Schuh

    IPC分类号: B62D005/06 B62D007/06

    摘要: A power machine includes one or more steerable wheels. The wheels are steerable using a hydraulic actuator to drive steering movement of the wheels. The power machine also includes steering angle sensors which sense the steering angle and provide a signal indicative of the angle at which the wheels are disposed relative to a longitudinal axis of the power machine. A hydraulic control system controls pressure of hydraulic fluid provided to the steering actuators based upon the steer angle position and desired change in position over time sensed by the steer angle sensors.

    摘要翻译: 动力机器包括一个或多个可转向轮。 使用液压执行器来驱动车轮可以驱动车轮的转向运动。 动力机器还包括转向角传感器,其感测转向角并且提供指示相对于动力机器的纵向轴线设置车轮的角度的信号。 液压控制系统基于转向角位置和由转向角传感器感测到的期望的位置变化来控制提供给转向致动器的液压流体的压力。

    Hydraulic control valve system with split pressure compensator
    10.
    发明授权
    Hydraulic control valve system with split pressure compensator 失效
    液压控制阀系统带分压式补偿器

    公开(公告)号:US5791142A

    公开(公告)日:1998-08-11

    申请号:US826184

    申请日:1997-03-27

    摘要: An improved pressure-compensated hydraulic system for feeding hydraulic fluid to one or more hydraulic actuators. A remotely located, variable displacement pump provides an output pressure equal to a control input pressure plus a constant margin. A pressure compensation system requires that a load-dependent pressure be provided to the pump input through a load sense circuit. An isolator transmits the load-dependent pressure to the pump control input, while preventing fluid from leaving the load sense circuit and flowing to the remotely located pump. A valve section, which controls the fluid flow between the pump and actuator, has a pressure compensating valve with a piston and spool controlling a pressure differential across a main control valve orifice by moving within a bore in response to a pressure differential between a pump supply pressure and the load sense pressure. The piston and spool also separate to shut off fluid flow to the actuator when the back pressure from the load exceeds the pump supply pressure.

    摘要翻译: 用于将液压流体供给到一个或多个液压致动器的改进的压力补偿液压系统。 一个位于远端的可变排量泵提供等于控制输入压力加上恒定余量的输出压力。 压力补偿系统要求通过负载检测电路向泵输入提供与负载有关的压力。 隔离器将负载依赖的压力传递到泵控制输入,同时防止流体离开负载感测电路并流到位于远程的泵。 控制泵和致动器之间的流体流动的阀部分具有压力补偿阀,该压力补偿阀具有活塞和阀芯,该活塞和阀芯通过响应于泵供应器之间的压力差在孔内移动而控制主控制阀孔的压力差 压力和负载感压。 当来自负载的背压超过泵的供给压力时,活塞和阀芯也分开以切断到致动器的流体流动。