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液压系统已经在冶金设备中广泛使用,特别是在带钢连扎机上采用电子计算机自动控制的液压压下系统,标志着七十年代的先进水平。因生产的迅速发展,就要求提高速度,严格控制精度,才能获得优质高产。液压系统采用电液伺服机构,大幅度地提高了自动控制程度。为了保证控制系统反应的直线性和灵敏性,必须减小滑阀的间隙,提高制造精度。同时,要求清净度较高的液压油、如稍有污染,滑阀动作就有被卡住而使系统控制失调。另一方面,
Hydraulic system has been widely used in metallurgical equipment, especially in the strip on the machine with a computer-controlled automatic hydraulic pressure system, marking the advanced level of the seventies. Due to the rapid development of production, it is required to increase speed and strictly control the precision so as to obtain high quality and high yield. Hydraulic system using electro-hydraulic servo, a substantial increase in the degree of automatic control. In order to ensure the linearity and sensitivity of the control system reaction, it is necessary to reduce the gap of the slide valve and improve the manufacturing precision. At the same time, require a higher degree of cleanliness of the hydraulic oil, such as slightly polluting, sliding valve movement has been stuck and the system control imbalance. on the other hand,