DISPLACEMENT CONTROLLING DEVICE FOR A VARIABLE DISPLACEMENT TYPE HYDRAULIC PUMP
    3.
    发明申请
    DISPLACEMENT CONTROLLING DEVICE FOR A VARIABLE DISPLACEMENT TYPE HYDRAULIC PUMP 审中-公开
    可变位移式液压泵的位移控制装置

    公开(公告)号:WO1996032593A1

    公开(公告)日:1996-10-17

    申请号:PCT/JP1996001005

    申请日:1996-04-11

    发明人: KOMATSU LTD.

    IPC分类号: F15B11/00

    摘要: A displacement controlling device for a variable displacement type hydraulic pump comprising a cylinder (21) for varying the displacement of a variable displacement type hydraulic pump (2), a control valve (26) for controlling the supply and discharge of discharging pressure of the variable displacement type hydraulic pump to and from the cylinder, a fixed displacement type hydraulic pump (3) driven together with the variable displacement type hydraulic pump by the same engine (1), and a throttle valve (18) provided along a discharge line of the fixed displacement type hydraulic pump, wherein the control valve is changed over by virtue of comparison between a differential pressure between the discharge pressure and a loading pressure and a set differential pressure, which is a differential pressure across the throttle valve so as to control the displacement of the variable displacement type hydraulic pump via the cylinder, whereby the differential pressure is made to be a certain value that matches the set differential pressure.

    摘要翻译: 一种用于可变排量型液压泵的排量控制装置,包括用于改变可变排量型液压泵(2)的排量的缸(21),用于控制变量的排出压力的供给和排出的控制阀(26) 位移型液压泵来自缸体,与同一发动机(1)一起与变量型液压泵一起驱动的固定排量型液压泵(3)和沿着排气管 固定位移型液压泵,其中通过比较排出压力和负载压力之间的压差和设定的压差(其是节流阀两端的压差)来控制控制阀,从而控制排量 通过气缸的可变排量型液压泵,由此将压差设定为一定值 匹配设定的压差。

    VOLUME CONTROL VALVE OF VARIABLE DISPLACEMENT HYDRAULIC ROTATING MACHINE
    4.
    发明申请
    VOLUME CONTROL VALVE OF VARIABLE DISPLACEMENT HYDRAULIC ROTATING MACHINE 审中-公开
    变量液压旋转机的容积控制阀

    公开(公告)号:WO00077403A1

    公开(公告)日:2000-12-21

    申请号:PCT/JP2000/003287

    申请日:2000-05-23

    摘要: A volume control valve of a variable displacement hydraulic rotating machine, wherein, while a spool (19) is set at a small volume position, a hydraulic chamber (22) communicates with a tank port (15C) to receive a pilot pressure only on a pressure receiving part (19G) side and reduce a pressure receiving area and, when a motor driving pressure used as a pilot pressure rises over a specified level, the spool (19) is largely displaced slidably against a return spring (24) to be switched to a large volume position, whereby a pilot pressure from a pilot port (15B) is led through a small hole (23) into the hydraulic chamber (22), and the pressure receiving area of the spool (19) is increased by an area of a pressure receiving part (20A) inside the hydraulic chamber (22) and, because the spool (19) receives the pilot pressure by the pressure receiving part (19G) and the pressure receiving part (20A) inside the hydraulic chamber (22), even if the pilot pressure lowers below the specified level, a hunting can be prevented in which, a volume control valve (11) is switched repeatedly between a large volume position and a small volume position.

    摘要翻译: 一种可变排量液压旋转机的体积控制阀,其中,当阀芯(19)设置在小体积位置时,液压室(22)与罐口(15C)连通,以仅在 压力接收部分(19G)侧并且减小受压面积,并且当用作先导压力的电动机驱动压力上升超过指定水平时,所述线轴(19)能够相对于复位弹簧(24)可滑动地大大移位以被切换 由此来自先导口(15B)的先导压力通过小孔(23)被引导到液压室(22)中,并且卷轴(19)的受压面积增加了一个面积 (22)内的压力接收部(20A)的压力接收部(20A)的压力接收部(20A)的压力接收部(20A)的压力接收部(20A) 即使先导压力低于指定的左右 可以防止在大体积位置和小体积位置之间重复地切换音量控制阀(11)的振荡。