我厂~#3锅炉引风机为双吸式Y5—53型,叶轮直径为1.89m;电动机为JSQ 184—6型,电压6kV,转速960rpm。该风机自1977年投运以来经常超电流,锅炉在额定工况运行时,电流经常是42～d5A(额定电流为40A),最高达到过47A;导叶挡板只要开到40—50%,引风机电流就超过了。后来,我们虽在风机间隙、烟道及预热器漏风等多方面找原因来解决,,但终未得到消除。 I plant ~ # 3 boiler induced draft fan for the double suction Y5-53 type, impeller diameter of 1.89m; motor type JSQ 184-6, voltage 6kV, speed 960rpm. The fan has been put into operation since 1977, often over-current, the boiler operating in rated conditions, the current is often 42 ~ d5A (rated current of 40A), the highest reached 47A; guide baffle open as long as 40-50% Fan current exceeds. Later, though we looked for the reasons in many aspects such as the fan gap, the flue and the preheater air leakage, we finally solved it.