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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。
Aiming at the stepping performance of a single hydraulic cylinder controlling the rod hydraulic drive mechanism, the dynamic process of hydraulic cylinder stepping was obtained through experiments. Combined with the structural characteristics of the hydraulic cylinder, the dynamic mechanism of the stepping process and the variation of the characteristic dynamic parameters with the weight are analyzed. The results show that the peak value of the dynamic flow rate of the hydraulic cylinder is due to the maximum flow rate of the additional flow induced by the increase of the inner volume of the hydraulic cylinder due to the rise of the inner sleeve to the top dead center, Pressure dynamic curve inflection point corresponds to; step down dynamic flow peak is due to the hydraulic cylinder sleeve step down to bottom dead center, the inner sleeve caused by the drop caused by the maximum cylinder flow due. The analysis provided the basis for the theoretical modeling of hydraulic cylinder stepping dynamic process and the study on leakage flow resistance of hydraulic cylinder seal structure.