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介绍应用比例节流阀和单片机实现旁路节流比例调压控制技术.通过压力传感器或负荷传感器构成大闭环负反馈,PID调节控制比例节流阀的排油量,实现系统压力的实时控制.消除了用传统比例溢流阀控制时的起始压力死区.研制成功了无压力控制死区的YDS-1液压式水泥压力试验机定速负荷控制装置,经国家技术监督局授权单位鉴定,精度达一级.
The application of proportional throttling valve and SCM to realize bypass throttling proportional pressure regulating technology is introduced.The large closed-loop negative feedback is formed by pressure sensor or load cell, PID regulates the oil discharge of proportional throttling valve and realizes the real-time control of system pressure. Elimination of the initial proportional pressure relief valve when the dead zone control.Development of a pressure-controlled dead zone YDS-1 hydraulic cement pressure test machine speed load control device, authorized by the State Bureau of Technical Supervision identification, Accuracy of one.