介绍泵直接传动的锻造液压机工作原理，对其控制机理、数学模型、控制策略进行了研究，并成功地应用于生产实践中。
The principle of forging hydraulic press by pump direct drive is introduced in this paper, the math model, control method and strategy are also described.
因此，它比泵直接传动的压机升压快，但是在使工件产生变形时作的功都是相等的。
So hydraulic press driven by pump-accumulator can boost pressure more quickly than driven directly by pump, but the work is equal when the two types of presses make work pieces deformed.
本文对液压锤使用的闭式液压系统性能进行了分析，在此基础上提出了泵直接传动的开式液压系统。
Based on the analysis to close loop hydraulic system of hydraulic hammer, this paper provides on open loop hydraulic system.
泵的传动通过弹性联轴器由电机直接驱动，从电机方向看，泵均为逆时针方向旋转。
The pump is driven by motor through flexible coupling. View from motor end, the rotating direction of pump is counter clockwise.
传动：泵通过弹性联轴器由电机直接驱动，从电机端看泵，泵为顺时针方向旋转。
Drive: pump is directly driven by motor through flexible coupling. View from motor end, the rotating direction of pump is clockwise.
传动：泵通过弹性联轴器由电机直接驱动，从电机端看泵，泵为顺时针方向旋转。
Drive: pump is directly driven by motor through flexible coupling. View from motor end, the rotating direction of pump is clockwise.
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