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    • 5. 发明授权
    • Valve seating control device with variable area orifice
    • 具有可变面积孔的阀座控制装置
    • US06302370B1
    • 2001-10-16
    • US09383987
    • 1999-08-26
    • John A. SchwoererEdward T. Leitkowski
    • John A. SchwoererEdward T. Leitkowski
    • F16K3112
    • F01L13/065F01L9/02F01L13/06F01L2760/00F16K47/023
    • A system for decelerating a linearly displaceable valve undergoing a closing motion is disclosed. The system includes a housing, a first hydraulic fluid chamber provided in said housing, and a slave piston for displacing the valve in response to the supply of hydraulic fluid to the first hydraulic fluid chamber. Deceleration of the valve may be accomplished by selectively throttling the release of hydraulic fluid in the first chamber to a second chamber. The hydraulic pressure in the second chamber opposes the closing motion of the valve, thereby slowing it gently for a valve seating event. Progressive throttling is used to maintain nearly constant hydraulic pressure in the second chamber during the seating event. The progressive throttling may be accomplished by selection of an appropriate throttling orifice size and shape, as well as an appropriate throttling profile for the orifice.
    • 公开了一种用于使经过闭合运动的线性位移阀减速的系统。 该系统包括壳体,设置在所述壳体中的第一液压流体室和用于响应于向第一液压流体室供应液压流体而使阀移动的从动活塞。 阀的减速可以通过选择性地节流将第一室中的液压流体释放到第二室来实现。 第二室中的液压与阀的关闭运动相反,从而缓慢地对阀座进行减速。 逐行节流用于在座位活动期间保持第二室中几乎恒定的液压。 可以通过选择适当的节流孔尺寸和形状以及孔的适当节流曲线来实现渐进式节流。