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。
A new type of electro hydraulic digital relief valve, which is a pilot pressure control component directly controlled by digital information is introduced.
介绍的新型电液数字溢流阀是一种数字信息直接控制的导控式压力控制元件。
To overcome the shortcomings of steam driven hammer, such as energy wasting and serious vibration, the new type program controlled hydraulic hammers are developed.
针对蒸—空模锻锤存在的浪费能源、振动噪音大等缺点，开发了用于蒸—空模锻锤更新换代的新型程控液压模锻锤。
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