会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 48. 发明申请
    • ROTARY VALVE FOR POWER STEERING GEAR
    • 动力转向齿轮旋转阀
    • WO1996034788A1
    • 1996-11-07
    • PCT/AU1996000266
    • 1996-05-03
    • AE BISHOP & ASSOCIATES PTY. LIMITEDUNISEARCH LTD.THOMAS, Andrew, Donald
    • AE BISHOP & ASSOCIATES PTY. LIMITEDUNISEARCH LTD.
    • B62D05/083
    • B62D5/0835B62D5/083Y10T137/86654Y10T137/86662
    • A rotary valve for a hydraulic power steering gear, has a sleeve (11) with slots (19a-b) journalled to an input-shaft (10) with grooves (18a-c), the co-acting sleeve slots and input-shaft grooves defining axially extending orifices. The orifices are ported as a network such that they form primary and secondary hydraulic Wheatstone bridges arranged in parallel, each bridge comprising two limbs each of which incorporate inlet and return orifices communicating to respective inlet and return ports of the valve. The limbs of the primary bridge incorporate means providing hydraulic communication to one of the cylinder port, whereas the limbs of the secondary bridge do not incorporate such means. The return orifice (34a, 34b) in each secondary bridge limb is formed by a metering edge contour on the edge of a secondary return groove (18c) and circumferentially overlapping an adjacent sleeve bore land when the valve is in its neutral position to such an extent such that the return orifice provides a restriction to hydraulic flow for all valve operating angles thereby applying a back pressure to the upstream inlet orifice. The back pressure being sufficient to significantly suppress the generation of cavitation noise in the inlet orifice.
    • 一种用于液压动力舵机的旋转阀,具有套筒(11),其具有轴颈(19a-b),所述槽(19a-b)轴颈连接到具有槽(18a-c)的输入轴(10),所述配合套筒槽和输入轴 限定轴向延伸孔的凹槽。 孔被移植成网络,使得它们形成并联布置的主要和次级液压惠斯通电桥,每个桥包括两个分支,每个分支包括与阀的相应入口和返回端口连通的入口和返回孔。 主桥的四肢包括提供与气缸端口之一的液压连通的装置,而次级桥的四肢不包括这种装置。 每个次级桥梁中的返回孔(34a,34b)由二级回流槽(18c)的边缘上的计量边缘轮廓形成,并且当阀门处于其相对的中间位置 使得返回孔为所有阀操作角度的液压流量提供限制,从而对上游入口孔施加背压。 背压足以显着地抑制入口孔中产生气穴噪声。