我厂现有4台苏制K4250鼓风机,是供大型高炉冶炼用风的离心式鼓风机,其特性曲线见图1。由图1可见,喘振线的右侧为风机的稳定工况区域,左侧为不稳定工况区域,即喘振区域。当运行工况点落入喘振区域时,鼓风机将发生喘振,在轮叶上会产生很大的脉冲作用应力,危害很大。因而,设置反喘振系统 I plant the existing four sets of Soviet system K4250 blower, for large blast furnace smelting wind centrifugal blower, the characteristic curve shown in Figure 1. As can be seen from Figure 1, the right side of the surge line is the steady operating area of ​​the fan and the left is the unstable operating area, ie the surge area. When the operating conditions fall into the surge region, the blower will surge, the pulse will produce a great role in the blade stress, a great harm. Thus, an anti-surge system is provided