锯齿冠低压涡轮工作叶片叶冠防错位设计方法

摘要

针对锯齿冠低压涡轮工作叶片在使用过程中发生的叶冠错位故障,在综合分析各次叶冠错位故障发生原因的基础上,总结了锯齿冠低压涡轮工作叶片叶冠错位模式,绘制了模式图,并针对各种叶冠错位模式提出了1套完整的锯齿冠低压涡轮工作叶片预防叶冠错位的设计方法.在2型发动机上进行应用的结果表明,本方法是切实可行的.%Aiming at the failure of Saw tooth shaped shroud dislocation caused by the operation of low pressure turbine working blade, based on a comprehensive analysis of the causes of each dislocation fault, the dislocation pattern of the saw tooth of pressure turbine working blade was summarized,and the model chart was drawn.Then blad complete design method was proposed to prevent the Saw tooth shaped shroud dislocation of the low pressure turbine.The application results on two different type engine show that this methods is feasible.