Steering control valve with contoured control surfaces
    1.
    发明公开
    Steering control valve with contoured control surfaces 失效
    Steuerventil mit gekerbtenSteuerflächenfüreine Lenkung。

    公开(公告)号:EP0585107A1

    公开(公告)日:1994-03-02

    申请号:EP93306706.8

    申请日:1993-08-24

    申请人: TRW INC.

    IPC分类号: B62D5/083

    摘要: A valve for controlling flow of hydraulic fluid. The valve includes a valve sleeve (82) and a valve core (80). The core (80) is disposed within the sleeve (82). The core (80) and sleeve (82) are relatively rotatable. Each of said core (80) and sleeve (82) has an axially extending land (192,220) and an axially extending groove (110,122).
    The core (80) and sleeve (82) have relative rotational positions such that the lands (192,220) overlap to define a flow gap for flow of hydraulic fluid from the groove (110) in the sleeve (82) to the groove (122) in the core (80). The flow gap has a minimum cross-sectional flow area adjacent to the groove (122) in the core (80). The minimum cross-sectional flow area constantly varies as the core (80) and sleeve (82) relatively rotate. The land (192) on the sleeve (82) has a notch (202) immediately adjacent to, and downstream of the minimum cross-sectional flow area which provides an abrupt increase in cross-sectional flow area for suppressing valve noise due to cavitation.

    摘要翻译: 用于控制液压油流量的阀。 阀包括阀套(82)和阀芯(80)。 芯(80)设置在套筒(82)内。 芯部(80)和套筒(82)可相对旋转。 所述芯部(80)和套管(82)中的每个具有轴向延伸的平台(192,220)和轴向延伸的凹槽(110,122)。 芯部(80)和套筒(82)具有相对的旋转位置,使得焊盘(192,220)重叠以限定用于使液压流体从套筒(82)中的凹槽(110)流到凹槽(122)的流动间隙, 在核心(80)。 流动间隙具有与芯部(80)中的凹槽(122)相邻的最小横截面流动面积。 当芯(80)和套筒(82)相对旋转时,最小横截面流动面积不断变化。 套筒(82)上的平台(192)具有与最小横截面流动区域紧邻并且在最小横截面流动区域下游的切口(202),其提供了横截面流动面积的突然增加,用于抑制由气蚀引起的阀门噪声。