控制棒水压驱动机构单缸步进动态过程

Single cylinder stepping motion for the control rod hydraulic drive mechanism

针对控制棒水压驱动机构单个水压缸的步进性能,通过实验获得了水压缸步进的动态过程。结合水压缸的结构特点,分析了步进过程的动态机理和特征动态参数随配重的变化规律。结果表明:水压缸步升动态流量峰值是由于水压缸内套步升到上止点,内套上升导致缸内容积增大而引入的附加流量达到最大值所致,该点与步升压力动态曲线拐点相对应;步降动态流量峰值是由于水压缸内套步降到下止点,内套下落而引起的出缸流量达到最大值所致。该分析为水压缸步进动态过程理论建模以及水压缸密封结构泄漏流阻的研究提供了依据。

The dynamic stepping motion of a hydraulic cylinder for the control rod hydraulic drive mechanism (CRHDM) was tested experimentally. The structural characteristics of the hydraulic cylinder were used to analyze the stepping motion mechanism and relate the loading to the dynamic process parameters. The results show that the peak in the step-up flow curve corresponds to the inflexion point in the dynamic pressure curve when the inside cylinder reaches the top and the additional flow induced by the step-up movement reaches a maximum. The peak in the step-down flow curve occurs when the inside cylinder reaches the bottom and the flow out of the cylinder caused by the step-down movement reaches a maximum. The results will facilitate analysis of the movement process and study of the flow resistance of the hydraulic cylinder seal structure.