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    • 39. 发明申请
    • POWER STEERING APPARATUS
    • 动力转向装置
    • US20090120085A1
    • 2009-05-14
    • US12266261
    • 2008-11-06
    • Tamotsu YAMAURA
    • Tamotsu YAMAURA
    • B62D5/06F15B9/14F15B1/04
    • B62D5/062B62D5/065
    • In a hydraulic power cylinder equipped power steering apparatus, a part of each of first and second hydraulic lines, associated with respective hydraulic chambers of the power cylinder, is constructed by a low-rigidity line functioning as a variable volume hydraulic-line section and formed of an elastically-deformable, flexible tube, made of a synthetic rubber. The line length of the low-rigidity line, which is disposed in each of the first and second hydraulic lines, is dimensioned so that each of an apparent modulus Ke of volume elasticity of working fluid in a first hydraulic pressure transmission path and an apparent modulus Ke of volume elasticity of working fluid in a second hydraulic pressure transmission path is set within a specified apparent volume modulus range, defined by an inequality 100 MPa≦Ke≦300 MPa.
    • 在配有液压动力缸的动力转向装置中,与动力缸的各个液压室相关联的每一个第一和第二液压管路的一部分由用作可变容积液压线段的低刚性线构成,并形成 由合成橡胶制成的可弹性变形的柔性管。 设置在第一和第二液压线中的每一个中的低刚度线的线长度的尺寸设定为使得第一液压传递路径中的工作流体的体积弹性的表观模量Ke和表观模量 将第二液压传递路径中的工作流体的体积弹性的Ke设定在由不等式100MPa <= Ke <= 300MPa限定的规定的表观体积模量范围内。
    • 40. 发明授权
    • High-flow direct-drive rotary servovalve
    • 高流量直驱式旋转伺服阀
    • US5597014A
    • 1997-01-28
    • US555574
    • 1995-11-08
    • Ralph L. Vick
    • Ralph L. Vick
    • F15B9/14F15B15/12F15B13/04
    • F15B9/14F15B15/12Y10T137/86654
    • A rotary valve (10) is adapted to be associated with a fluid source (P) and a fluid return (R), and is adapted to control the flows of fluid (via control ports C.sub.1 and C.sub.2) with respect to the opposed chambers of a fluid-powered load. The valve has a body (11) provided with an elongated bore (12). The body has a plurality of passageways (23, 24, 25, 26) communicating spaced locations along the bore with the source, return and load control ports, respectively. A spool member (28) is rotatably mounted in the bore. The spool member has a passage adapted to cooperate with a body passageway so as to define at least one flow-metering port therebetween. The area of this flow-metering port or orifice (34) is a function of the angular displacement of the spool member relative to the body from a null position. The improvement comprises each of the upstream approach walls (32, 35) adjacent the orifice being relieved at an angle (.beta.) of at least 21.degree. with respect to a radial plane so as to cause the flow through the orifice, whether directed inwardly or outwardly, to be substantially radial, thereby to eliminate tangential Bernoulli reaction forces acting on the spool member.
    • 旋转阀(10)适于与流体源(P)和流体回流(R)相关联,并且适于控制流体(经由控制端口C1和C2)相对于相对的腔室 流体动力负载。 阀具有设置有细长孔(12)的主体(11)。 主体具有多个通道(23,24,25,26),其分别沿着孔与间隔开的位置与源,返回和负载控制端口连通。 卷轴构件(28)可旋转地安装在孔中。 卷轴构件具有适于与主体通道配合以便在其间限定至少一个流量计量通道的通道。 该流量计量口或孔口(34)的面积是从零位置相对于主体的卷轴构件的角位移的函数。 改进包括相邻于孔的相邻孔的每个上游进入壁(32,35)以相对于径向平面至少21°的角度(β)释放,以使流动通过孔口,无论是向内还是向内 向外,基本上是径向的,从而消除作用在卷轴构件上的切向伯努利反作用力。