|
相信大家在日常检查中经常会碰到结构或部件的损伤，损伤形状各种各样的，一查手册，手册上关于各种损伤情况的放行标准和修复方法期限均不相同，判断错误，你就Game Over了。下面就来聊聊这些损伤到底是怎么区分的，之间有啥区别？以发动机叶片损伤为例：
Cracks(裂缝） Separation of the metal-Always appears as a dark jagged line 金属的分离通常以黑色锯齿形线的形式出现 • It is caused by Heat and/or Vibration •它是由热和/或振动引起的 overstressing metal until it separates-fatigue 过度应力金属直到它分离-疲劳 • A crack will not change by varying light intensity •裂缝不会因为光线的改变而改变强度 • It can be Axial, Radial and Circumferential •它可以是轴向、径向和周向的 • Its length is the most important value for inspectors •对检查者来说它的长度是最重要的。
Nicks（刻痕） • Are V shaped • 是V形 • The bottom of the Nick will stay bright while the sides are dark •底部的划痕将保持明亮，而侧边是黑色 • Sides will gradually darken when lowering intensity. •降低光照强度时两侧会逐渐变暗 • It may be caused by FOD or DOD •可能由FOD或DOD引起 • It can leads cracks •它会导致裂缝 • Its depth is the most important value for inspector •对检查者来说它的深度是最重要
Dent（压坑） • Are U shaped
U型的 • It can be caused by FOD/DOD •可能由FOD/DOD引起 • The entire surface will uniformly brighten & dim when changing the light intensity •当改变光照强度时，整个表面将均匀地变亮和变暗 • Its depth is the most important value for inspector •对检查者来说它的深度是最重要
Tears(撕裂） • A force greater than the metal can withstand •遭遇了一个比金属能够承受的更大的力 • It can be caused by FOD or DOD •可能由FOD或DOD引起 • Usually associated with cracks •通常与裂缝有关 • Its length is the most important value for inspector •对检查者来说它的长度是最重要的值
Burn(烧伤） • Charred metal •烧焦的金属 • Usually on HPT nozzles and Combustion •通常位于高压涡轮出口和燃烧室 • Black HPT nozzle all the way around suspect over temperature. 高压涡轮出口发黑一般是怀疑超温导致 • Its area is the most important value for inspector •对检查者来说它的面积是最重要。
Tip Curl(叶尖卷边）
• Associated with HPC blades •与高压压气机叶片有关 • It can be cause by the contact between tip and shroud •可能是由于叶尖与机匣接触造成的 • Its length are the important value for inspector
•对检查者来说它的长度是最重要的
Missing Materail(材料缺失） • Material missing •材料丢失 • It can be caused by the FOD/DOD or overtemperature •可能是FOD/DOD或温度过高造成的 • Its length or depth are the most important value for inspector
•对检查者来说它的长度或深度是最重要的
| 
VSV作动环衬套损伤放行标准和更换注意事项
安定面配平的几种方式
7B发动机部件总结
液压A、B系统串油的原理
发表于 2020-4-21 11:27:33
