APU在翼水洗工艺初探

航线上APU经常由于其压气机积污而导致APU引气压力和EGT裕度降低,为解决这一现实问题,维修部门除了按照排故手册进行工作之外,水洗APU往往是维修部门特别推荐的方案之一,本文通过对APU水洗必要性的分析,基于目前国内外航空公司和大修厂的水洗APU情况,并结合航空发动机的水洗经验,探讨了APU在翼水洗的方法和程序,在此基础上,结合APU自身结构特点及人为条件,分析APU水洗效果不佳的原因,这对于改善维修部门的维修情况是非常必要和有益的。

Study of Cleaning Technology of APU on Wings

APU contamination on compressor may leads to decrease of the APU bleeding air pressure and EGT margin.The maintenance department should solve these problems with guidance of the troubleshooting manual,in addition,the cleaning of APU is also especially recommended.With necessary analysis to APU cleaning procedures performed by domestic airlines and experiences of aero-engine cleaning in overhaul shop,the paper discusses procedures of cleaning of APU on wings and analyzes its reasons why cleaning is not so effective in consideration of APU and local conditions,which are necessary and beneficial to improve the current status of maintenance.