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.
介绍了该新型程控液压模锻锤结构特点、参数计算、性能分析、插装阀集成开式液压系统和PLC程序控制系统。
In this paper, the structural characteristics, parameters calculation, performance analysis, open loop hydraulic system with integrated plug in valves and PLC control system are presented.
设计了一个盾构掘进机的刀盘驱动液压系统，该系统是开式液压系统，应用电液比例控制技术实现了泵排量实时调节。
A hydraulic drive system of cutter head in shield tunneling machine was designed, which is open type hydraulic system and controlled in open-ring.
设计了一个盾构掘进机的刀盘驱动液压系统，该系统是开式液压系统，应用电液比例控制技术实现了泵排量实时调节。
An improved cutter head drive hydraulic system of the shield tunneling machine was proposed, which achieved energy saving by optimizing the drive power.
工作机构的变速和换向靠调节泵或马达的变量机构实现，避免了开式系统换向过程中所出现的液压冲击和能量损失。
The work of agencies to rely on speed and for adjusting the pump or motor variables agencies to achieve, to avoid the open loop system for the process are the hydraulic impact and energy loss.
是各种开式系统起重液压回路典型而关键的液压元件。
It is the typical and key hydraulic component in every lifting hydraulic pressure loop with open-type System.
开式系统是指液压泵从油箱吸油，油经各种控制阀后，驱动液压执行元件，回油再经过换向阀回油箱。
Open system is the pump suction from the tank, the oil through a variety of control valves, the drive hydraulic actuators, valve oil return back for another fuel tank.
从不同的角度出发，可以把液压系统分成不同的形式。1按油液的循环方式，液压系统可分为开式系统和闭式系统。
From a different point of view, the hydraulic system can be divided into different forms. 1 the way the cycle of oil, hydraulic system can be divided into open systems and closed systems.
从不同的角度出发，可以把液压系统分成不同的形式。1按油液的循环方式，液压系统可分为开式系统和闭式系统。
From a different point of view, the hydraulic system can be divided into different forms. 1 the way the cycle of oil, hydraulic system can be divided into open systems and closed systems.
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