The calculation model of hydro - mechanical transient in existence was deeply studied and the conclusion is that , for kaplan turbine and pelton turbine , neglecting differences of dynamic mater pressure along the turbine spiral case during transient may cause some error in the calculation of pressure rise and speed rise 本文深入研究分析了轴流式和冲击式机组过渡过程计算的现有模型，指出现有模型中对蜗壳(进水管)部分的处理方法会给这两种机组的过渡过程计算带来相对较大的偏差。
The stuffs from the nupper of the machine , falling into the high - speed rotating impeller , strike with other stuffs which more around the impeller because of high - speed centrifugal force . after they strike matually , whirling fluid is produced between the impeller andoutercovering . through repeatedly striking and rubbing , the stuffs are crushed into pieces and straightly come out of the lower . the operating process forms into closed circuit , circulate repeatedly and then attains the fineness of the product 制砂机机制砂生产线打砂机砂石料破碎生产线建筑砂生产线制沙机打沙机河南重型机器厂是生产制砂机系列设备的专业厂家， pcl直通冲击式破碎机制砂机用途广泛，其性能已达到国际领先水。该冲击破制砂机是目前最行之有效，实用可靠的碎石机器。
