针对某型6 MW燃气轮机进口可转导叶（IGV）驱动机构经常卡涩且动作精度低的问题，分析了IGV驱动机构中气动、液压驱动和电缸驱动三种方法的优劣。根据实际情况选用最合适的电动驱动机构实施改造，采用电缸及相关控制系统，将燃气轮机实际运行数据及出厂数据作为IGV动作的基本依据。对比改造前后IGV动作情况和燃气轮机实际运行数据，电缸驱动IGV动作误差小于0.5°，改造后实际稳定运行超过2 100 h。

Aiming at the problem that the inlet guide vane (IGV) driving mechanism of a certain 6 MW gas turbine is often jammed with poor motion accuracy,the advantages and disadvantages of pneumatic,hydraulic and electric cylinder driving methods in IGV driving mechanism are analyzed.According to the actual situation of this type gas turbine,the most appropriate electric driving mechanism is selected for the transformation,by using the electric cylinder and related control system,the actual operation data and factory data of gas turbine are used as the fundamental basis of IGV operation.Comparing the IGV operation situations and the actual operation data of gas turbine before and after the transformation,it is confirmed that the IGV motion error driven by electric cylinder is less than 0.5°,and the actual stable operation time after the transformation is more than 2 100 hours.

TK472