Hydraulic circuit of construction machine
    1.
    发明授权
    Hydraulic circuit of construction machine 有权
    施工机械液压回路

    公开(公告)号:US08151688B2

    公开(公告)日:2012-04-10

    申请号:US12339813

    申请日:2008-12-19

    IPC分类号: F15B13/042 F16D31/02

    摘要: A throttle path for returning a part of pilot oil to a tank is formed by a tank path provided in a valve block of a control valve and a notch provided in a spool thereof. The above path is opened within a section from a vicinity of a stroke where a hydraulic actuator starts moving to right before a stroke end among a spool stroke of the control valve. An opening area of the above path is slowly reduced in accordance with an increase in the stroke at a final phase of the section.

    摘要翻译: 用于使一部分先导油返回到罐的节气门路径由设置在控制阀的阀块中的槽路和设置在其阀芯中的槽口形成。 上述路径在从控制阀的滑阀行程中的行程结束前的液压致动器开始向右移动的行程附近的部分内打开。 根据截面的最后阶段的行程的增加,上述路径的开口面积缓慢减小。

    HYDRAULIC CIRCUIT OF CONSTRUCTION MACHINE
    2.
    发明申请
    HYDRAULIC CIRCUIT OF CONSTRUCTION MACHINE 有权
    建筑机械液压回路

    公开(公告)号:US20090205723A1

    公开(公告)日:2009-08-20

    申请号:US12339813

    申请日:2008-12-19

    IPC分类号: F16K31/12

    摘要: A throttle path for returning a part of pilot oil to a tank is formed by a tank path provided in a valve block of a control valve and a notch provided in a spool thereof. The above path is opened within a section from a vicinity of a stroke where a hydraulic actuator starts moving to right before a stroke end among a spool stroke of the control valve. An opening area of the above path is slowly reduced in accordance with an increase in the stroke at a final phase of the section.

    摘要翻译: 用于使一部分先导油返回到罐的节气门路径由设置在控制阀的阀块中的槽路和设置在其阀芯中的槽口形成。 上述路径在从控制阀的滑阀行程中的行程结束前的液压致动器开始向右移动的行程附近的部分内打开。 根据截面的最后阶段的行程的增加,上述路径的开口面积缓慢减小。