Roller nut-type control rod drive
    1.
    发明授权
    Roller nut-type control rod drive 失效
    滚子式NUT型控制杆驱动

    公开(公告)号:US3822439A

    公开(公告)日:1974-07-09

    申请号:US33485173

    申请日:1973-02-22

    发明人: WALLIN R NULL J SMITH D

    摘要: A control rod drive of the type wherein the load is actuated by a non-rotatable screwshaft driven axially within a sealed tubular enclosure includes a spinning nut assembly consisting of roller nuts mounted on pivoted segment arms and movable into and out of mesh with the screwshaft by energization and deenergization of an induction-type motor. The segment arms form a portion of the rotor so that when the field of stator rotates the roller nuts planetate to drive the shaft. A combined support and convectioncontrolling housing structure for the mechanism is adapted to be attached to the cover of a reactor vessel and includes an upwardly extending torque-taking piston-carrying section connected to the screwshaft and a snubbing cylinder for controlling the rate of descent and absorbing shock in event of scan, and means for parking the screwshaft in a raised position.

    摘要翻译: 这种类型的控制棒驱动器,其中负载由在密封的管状外壳内轴向驱动的不可旋转的螺旋轴驱动,包括旋转螺母组件,该旋转螺母组件由安装在枢转的段臂上的滚子螺母组成,并可通过 感应式电动机的通电和断电。 分段臂形成转子的一部分,使得当定子的磁场旋转滚子螺母行星体以驱动轴时。 用于机构的组合的支撑和对流控制壳体结构适于附接到反应堆容器的盖子,并且包括连接到螺杆轴的向上延伸的扭矩捕获活塞承载部分和用于控制下降速率的缓冲气缸 并且在扫描时吸收冲击,以及用于将螺钉轴停放在升高位置的装置。

    Method and apparatus for cleaning heated surfaces
    2.
    发明授权
    Method and apparatus for cleaning heated surfaces 失效
    清洗加热表面的方法和装置

    公开(公告)号:US3782336A

    公开(公告)日:1974-01-01

    申请号:US3782336D

    申请日:1971-10-21

    发明人: NELSON J

    CPC分类号: F28G9/00 F28G1/163

    摘要: A method and apparatus for deslagging high temperature water walls of boilers while steaming, utilizing a jet of water applied in such manner as to develop sufficient mechanical energy to dislodge the slag without chilling the wall to a harmful degree.

    摘要翻译: 一种用于在蒸汽时将锅炉的高温水壁脱气的方法和装置,利用施加的水流,以产生足够的机械能来移走炉渣,而不会使壁部产生有害的程度。