降低H型钢轧机液压压下系统故障

Reducing the Failure of Hydraulic Pressing System of H-beam Finishing Mill

长钢轧钢厂H型钢生产线精轧机组液压压下系统采用三通阀—不对称缸控制模式,压下缸活塞杆腔通的恒定低压经常出现压力波动超设定范围故障,造成轧机机组电控TCS系统报警停车。通过对故障进行分析,找到了故障原因,经改进后故障得到了有效消除。

Three-way valve-asymmetric cylinder control mode is adopted i n the hydraulic screwdown system of finishing mill of H-beam production line in Changzhi Iron and Steel Co. Ltd. The constant low pressure of piston rod chamber of screwdown cylinder often occurs pressure fluctuation beyond the set range, which results in the alarm stop of the electronic control TCS system of rolling mill. In this paper, the fault is analyzed and the cause of the fault is found. After improvement, the fault is effectively eliminated.