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163 条记录 (耗时 0.014 秒)

    Multiple pressure fluid system
    51.
    发明授权
    Multiple pressure fluid system 失效
    多压力流体系统

    公开(公告)号：US3713291A

    公开(公告)日：1973-01-30

    申请号：US3713291D

    申请日：1970-11-23

    申请人： KUBIK P

    发明人： KUBIK P

    IPC分类号： F15B11/02 ,  F15B15/18

    CPC分类号： F15B11/02 ,  F15B2211/20553 ,  F15B2211/30505 ,  F15B2211/30525 ,  F15B2211/3116 ,  F15B2211/327 ,  F15B2211/50518 ,  F15B2211/50536 ,  F15B2211/5151 ,  F15B2211/5154 ,  F15B2211/528 ,  F15B2211/613 ,  F15B2211/615 ,  F15B2211/6336 ,  F15B2211/6355 ,  F15B2211/7054 ,  F15B2211/755 ,  F15B2211/765

    摘要： A fluid system having a variable displacement fluid direct fluid in a closed loop circuit to a fluid cylinder having a piston and a pair of connecting rods extending from opposite sides of the piston externally of the fluid cylinder. A main directional control valve disposed in the closed circuit between the inlet and outlet of the fluid pump is adapted to selectively direct fluid to one side of the piston within the fluid cylinder, while exhausting fluid from the other side of the piston, to selectively move the piston within the fluid cylinder. The rate of movement of the piston in either direction of movement is controlled by the amount of fluid displaced by the fluid pump. A second directional control valve is adapted to fluid FLUID from a second source of fluid to a pressure responsive displacement control mechanism to selectively vary the displacement of the fluid pump between a maximum and a minimum value. The rate of fluid flow to the pressure responsive displacement control mechanism is selectively varied to control the rate of displacement of the fluid pump and to thereby selectively control the rate of movement of the cylinder piston. A remotely controlled pilot operated pressure relief valve, having an inlet connection in fluid communication with the outlet conduit of the fluid pump upstream from the main directional control valve and an outlet connection in fluid communication with the inlet conduit of the fluid pump between the fluid pump and the main directional control valve, is operable to reduce the normal operating pressure in the outlet conduit, and thus the operating pressure of the fluid in the main fluid cylinder, to a lower predetermined value when the pressure responsive displacement control mechanism is actuated to vary the displacement of the fluid pump toward a minimum value.

    摘要翻译： 一种流体系统，其具有在具有活塞的闭环回路中的可变排量流体直接流体，以及从流体缸的外部的活塞的相对侧延伸的一对连接杆。 设置在流体泵的入口和出口之间的闭合回路中的主方向控制阀适于选择性地将流体引导到流体缸内的活塞的一侧，同时从活塞的另一侧排出流体，以选择性地移动 液压缸内的活塞。 活塞在两个运动方向的移动速度由流体泵移动的流体的量来控制。

    Hydraulic drive control apparatus
    52.
    发明授权
    Hydraulic drive control apparatus 失效

    公开(公告)号：US3625004A

    公开(公告)日：1971-12-07

    申请号：US3625004D

    申请日：1969-11-20

    申请人： EATON YALE & TOWNE

    发明人： HOLZBOCK WERNER G ,  BROWN WADE R

    IPC分类号： F15B11/08 ,  F15B21/08 ,  F15B15/18

    CPC分类号： F15B11/08 ,  F15B21/08 ,  F15B2211/30565 ,  F15B2211/326 ,  F15B2211/327 ,  F15B2211/35 ,  F15B2211/755 ,  F15B2211/765

    摘要： DISCLOSED HEREIN CONTROL APPARATUS FOR A HYDRAULIC DRIVE ARRANGEMENT PROVIDING THE DRIVE ARRANGEMENT WITH STANBY, INTERMITTENT, AND CONTINUOUS MODES OF OPERATION. A FLUID PRESSURE SOURCE, HYDRAULIC MOTOR, AND CONTROL APPARATUS FOR REGULATING FLUID FLOW BETWEEN THE FLUID SOURCE AND THE MOTOR FORM THE DRIVE ARRANGEMENT. THE CONTROL APPARATUS INCLUDES A PLURALITY OF FLOW PATHS THRUGH THE APPARAGUS, A PLURALITY OF VALVES DISPOSED IN THE FLOW PATHS WITH EACH VALVE HAVING A PLURALITY OF OPERATING POSITONS, AND STRUCTURE FOR OPERATING THE VALVES TO MOVE THE VALVES BETWEEN THE VARIOUS OPERATING POSITIONS TO REGULATE FLUID

    FLOW THROUGH THE CONTROL APPARATUS. A MECHANICAL FEEDBACK LOOP OPERABLE IN RESPONSE TO A PREDETERMINED ANGULAR INCREMENTAL ADVANCE OF THE MOTOR CONTROLS THE OPERATING POSITON OF ONE OF THE VALVES WHEREBY THE MOTOR MAY BE UTILIZED FOR THE POSITIONING OF A DRIVEN MEMBER OR LOAD ACCURATELY AND RAPIDLY EITHER IN A SERIES OF PREDETERMINED INCREMENTS OR IN A SINGLE CONTINUOUS OPERATION.

    Actuator Limit Controller
    59.
    发明申请
    Actuator Limit Controller 有权
    执行器限位控制器

    公开(公告)号：US20160025114A1

    公开(公告)日：2016-01-28

    申请号：US14489778

    申请日：2014-09-18

    申请人： Google Inc.

    发明人： Alex Perkins ,  Kevin Blankespoor ,  Alfred Rizzi

    IPC分类号： F15B13/02

    CPC分类号： F15B13/021 ,  F15B9/09 ,  F15B11/048 ,  F15B15/28 ,  F15B15/2815 ,  F15B21/08 ,  F15B2211/30575 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/6654 ,  F15B2211/6656 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/755 ,  F15B2211/7653 ,  F15B2211/8606 ,  G05B19/00

    摘要： In some applications, a piston of a hydraulic actuator may move at high speeds, and large undesired forces may be generated if the piston reaches an end-stop of the hydraulic actuator at a high speed. The undesired forces may, for example, cause mechanical damage in the hydraulic actuator. A controller may receive information indicative of the piston reaching a first position at a first threshold distance from the end-stop, and, in response, may modify a signal to a valve assembly controlling flow of hydraulic fluid to and from the hydraulic actuator. Further, the controller may receive information indicative of the piston reaching a second position at a second threshold distance closer to the end-stop of the hydraulic actuator, and, in response, the controller may further modify the signal to the valve assembly so as to apply a force on the piston in a away from the end-stop.

    摘要翻译： 在一些应用中，液压致动器的活塞可以高速运动，并且如果活塞以高速到达液压致动器的终端，则可能产生大的不期望的力。 例如，不期望的力可能导致液压致动器中的机械损坏。 控制器可以接收指示活塞到达终端的第一阈值距离处的第一位置的信息，并且作为响应，可以将信号修改为控制液压流体流向和从液压致动器流出的阀组件。 此外，控制器可以接收指示活塞到达靠近液压致动器的停止的第二阈值距离处的第二位置的信息，并且作为响应，控制器可以进一步修改到阀组件的信号，以便 在活塞上远离终点站施加力。

    Hydraulic control system having swing motor recovery
    60.
    发明授权
    Hydraulic control system having swing motor recovery 有权
    液压控制系统具有回转马达回收

    公开(公告)号：US09086081B2

    公开(公告)日：2015-07-21

    申请号：US13718922

    申请日：2012-12-18

    申请人： Caterpillar Inc.

    发明人： Jiao Zhang ,  Pengfei Ma ,  Tonglin Shang ,  Rustu Cesur ,  Bryan J. Hillman ,  Peter Spring ,  Lawrence J. Tognetti ,  Randal N. Peterson ,  Dayao Chen

    IPC分类号： F15B21/14

    CPC分类号： F15B21/14 ,  F15B1/024 ,  F15B2211/625 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/7058 ,  F15B2211/75 ,  F15B2211/755 ,  F15B2211/88

    摘要： A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control valve configured to control fluid flow between the pump, the swing motor, and the tank. The hydraulic system may also have an accumulator configured to selectively receive pressurized fluid discharged from the swing motor and selectively supply pressurized fluid to the swing motor, at least one accumulator valve, and a controller. The controller may be configured to receive input indicative of a difference between desired and actual speeds of the swing motor, and determine if the swing motor is accelerating or decelerating based on the difference. The controller may also be configured to control the at least one accumulator valve to cause the accumulator to selectively receive or supply pressurized fluid only when the swing motor is accelerating or decelerating.

    摘要翻译： 公开了一种用于机器的液压控制系统。 液压控制系统可以具有罐，泵，回转马达和构造成控制泵，回转马达和罐之间的流体流动的至少一个控制阀。 液压系统还可以具有蓄能器，其被配置为选择性地接收从回转马达排出的加压流体，并且选择性地将加压流体供应到回转马达，至少一个储能阀和控制器。 控制器可以被配置为接收指示回转马达的期望速度和实际速度之间的差异的输入，并且基于该差异来确定回转马达是加速还是减速。 控制器还可以被配置成控制至少一个蓄能阀，使得蓄能器仅在回转马达正在加速或减速时有选择地接收或供应加压流体。