改造引风机叶轮　提高引风机出力

Transform induced draft fan to improve its output

本文从对高原地区锅炉引风机的性能分析入手，阐述了锅炉引风机叶轮外径增大后风机全风压、风机效率的计算方法，风机叶轮外径增大后风机叶轮转子找平衡的方法。并将理论计算与工程实践结果进行了对比分析。本文所提出的方法可应用于工程实践。

This paper deals with a caculating method of total pressure and efficiency of boiler induced draft fan when the fan's external diameter is extended. It also introduces the method of making balance for the roller of boiler induced draft fan and gives a contrastive analysis between calculating result and engineering practice. The methods can be used for engineering practice.