谐波螺旋传动式核动力装置用截止阀的设计

Design of Harmonic Screw-driven Stop Valve for Nuclear Power Units

谐波螺旋式阀门采用双波谐波螺旋传动,实现由圆周运动向直线运动的转化,实现阀门的启闭。阀体与连接法兰的密封为体盖密封。在该截止阀的设计中,采用了阀杆导向装置,达到导向的目的。截止阀的柔性元件的径向变形值可以调节,保证柔性螺纹套的环槽与螺杆上的螺纹的接合深度。柔性螺纹套和带有螺杆的阀杆均置于柔性密闭壳体中。柔性轴承由薄壁的外座圈和内座圈组成,内外座圈的端面有环状轨道,其中置有用保持架隔开的滚动体,另外在螺杆与阀杆相互位置的固定设计时,采用了销联接。

The harmonic screw type valve is driven by the double wave harmonic screw. It can transform circle movement to line movement for closing and opening the valve. The body and flange were airproofed by shell. The stern guiding device was used in the stop valve for guide. Radial distortion of the flexible component in the stop valve would be adjusted so as to ensure the joint depth between flexible screw thread trepanning circular groove and screw thread on the screw. Both flexible whorl cover and stern with screw were placed in flexible sealing shell. Flexible rolling bearing was composed of an outer ring and an inter ring. There was a raceway groove on the surface of the outer ring and the inter ring. The rolling elements in the groove are separated by cage, and the screw and stern were fixed by pin.