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    • 2. 发明授权
    • Aligning and seal ring retracting apparatus for plug type valve
    • 塞式阀的对位和密封环回缩装置
    • US4978102A
    • 1990-12-18
    • US426825
    • 1989-10-26
    • Thomas L. SchuchartDavid B. Berrong
    • Thomas L. SchuchartDavid B. Berrong
    • B23P21/00F16J9/22F16K3/24
    • F16J9/22F16K3/243Y10T137/86791
    • A valve plug assembly for use in a steam throttle valve includes a valve body and a removable guide ring attached to one end of the valve body. An outer edge portion is removed from the guide ring at the interface with the valve body so that a circumferential groove is defined about the valve plug when the guide ring is assembled to the valve body. A slot is formed in one wall of the groove, preferably in the guide ring, and a wear ring inserted in the slot. The wear ring extends above the wall surface and terminates in an angled bearing surface. A pressure seal ring is formed with a mating bearing surface and is placed in the groove prior to assembly of the valve plug. The angular taper on the mating bearing surfaces causes some retraction of the pressure seal ring in response to sudden valve plug movement in the closed direction.
    • 用于蒸汽节流阀的阀塞组件包括阀体和连接到阀体一端的可移除导向环。 外部边缘部分在与阀体的界面处从引导环移除,使得当导向环组装到阀体时围绕阀塞限定周向凹槽。 在槽的一个壁中,优选地在导向环中形成槽,以及插入槽中的耐磨环。 磨损环在壁表面上方延伸并终止于成角度的轴承表面。 压力密封环形成有配合轴承表面,并且在组装阀塞之前放置在凹槽中。 配合轴承表面上的角度锥度导致压力密封环响应于在闭合方向上突然的阀塞运动而导致一些回缩。
    • 4. 发明授权
    • Anti-wedging pressure seal ring apparatus
    • 防楔式密封圈装置
    • US4899983A
    • 1990-02-13
    • US298443
    • 1989-01-18
    • David B. BerrongThomas L. Schuchart
    • David B. BerrongThomas L. Schuchart
    • F01D17/10F16J9/22
    • F16J9/22
    • A valve plug having a valve plug housing shaped to fit in a bonnet cylinder of steam control valves has a pressure seal ring groove for holding a pressure seal ring therein. The pressure seal ring groove has a pair of walls and a bottom surface end and antiwedging relief groove formed in one wall of the pressure seal ring groove adjacent the bottom surface thereof to prevent the wedging of a pressure seal ring between a valve plug and a bonnet cylinder bore wall. The pressure seal ring wears a step in the contact surface to allow the wedging which can otherwise prevent the valve from closing as required for turbine overspeed protection. The valve plug housing pressure seal ring groove can be annular groove having an annular pressure seal ring therein and the relief groove can be annular groove formed in one wall of the pressure seal ring groove adjacent the pressure seal ring along the seal ring contact surface of the pressure seal ring. The relief groove has a pair of sidewalls and a bottom surface with one wall forming an extension to the pressure seal ring groove bottom surface so that wear on the pressure seal ring groove wall enlarges the width of the pressure seal groove to prevent a step forming therein and wedging of the pressure seal ring between the valve plug and the bonnet cylinder bore.
    • 具有形成为安装在蒸汽控制阀的发动机罩缸中的阀塞壳体的阀塞具有用于在其中保持压力密封环的压力密封环槽。 压力密封环槽具有形成在压力密封环槽的与其底表面相邻的一个壁中的一对壁和底表面端部和反向止动槽,以防止阀塞和阀盖之间的压力密封环的楔入 气缸孔壁。 压力密封环在接触表面磨损一步,以允许楔入,否则会阻止阀门关闭,以满足涡轮超速保护要求。 阀塞壳体压力密封环槽可以是其中具有环形压力密封环的环形槽,并且所述释放槽可以是形成在压力密封环槽的一个壁中的环形槽,所述环形槽沿着压力密封环的密封环接触表面 压力密封圈。 该释放槽具有一对侧壁和底面,一个壁形成与压力密封环槽底面的延伸,使得压力密封环槽壁上的磨损扩大了压力密封槽的宽度,以防止在其中形成台阶成形 并且在阀塞和发动机罩缸孔之间楔入压力密封环。