我院杨世祥工程师于1983年开始研究数字阀,1984年初又设计了一种新型的数字阀。这种新型数字阀结构简单、体积小、精度高、安装维护方便,运行过程中系统无冲击、无振动,阀无噪声、无外漏,抗污染能力强。该阀的主要性能如下:试验用液压缸内径63mm额定流量60L/min额定压力21MPa最大速度350mm/s重复定位精度±0.05～0.1mm脉冲当量0.2、0.5mm油液过滤精度20μm工作介质矿物油、乳化液我们用这种新数字阀与液压缸组成一个 Yang Shixiang engineers in our hospital began to study digital valves in 1983, and in early 1984 designed a new type of digital valve. The new digital valve has the advantages of simple structure, small size, high precision, convenient installation and maintenance, no impact during operation, no vibration, no noise, no leakage and strong anti-pollution ability. The main performance of the valve are as follows: Hydraulic cylinder diameter 63mm Rated flow rate 60L / min Rated pressure 21MPa Maximum speed 350mm / s Repeat positioning accuracy ± 0.05 ~ 0.1mm Pulse equivalent 0.2,0.5mm Oil filtration precision 20μm Working medium mineral oil, Emulsion We use this new digital valve and hydraulic cylinder to form one