发动机低涡轴碰磨故障的装配工艺分析

Assembly Analysis of Collision Failure on Low Pressure Turbine Shaft of Engine

针对航空发动机低压涡轮轴的碰磨故障,从装配工艺性出发,进行结构特点和工艺方法分析,通过定心引导分析、吊装稳定性分析、碰磨风险计算,得出装配过程中低压涡轮轴的碰磨原因。提出增加后支点定心引导、提高定心配合精度等改进措施,实现低压涡轮轴的双支点水平定心引导装配,解决低压涡轮轴表面防腐漆的碰磨脱落问题。

For the collision failure on low pressure turbine shaft of aero-engine, from the assembly process, the structure feature and the process method are analyzed. By the means of centering fixation guidance, hoisting assembly stability and collision risk calculation, the collision reason of low pressure turbine shaft is obtained in the assembly process. The improving measures such as adding up the centering fixation guidance of rear fulcrum and increasing the centering accuracy are proposed to achieve the double fulcrum level centering guidance assembly of low pressure turbine shaft, which solve the problem of corrosion prevention paint falling out on low pressure turbine shaft surface.