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分析了某型发动机涡轮盘后封严环一次试车后出现表面漆层脱落故障的原因,结合涂覆工艺及发动机工作原理,进行了验证试验。结果表明,该漆层表面处理工艺合理,试片在660～720℃的静态环境条件下不会发生漆层起泡和脱落现象;发动机在运转过程中高温燃油蒸气的附着和气流的冲刷,是导致漆层发生鼓泡和脱落的原因。
The reason of surface paint shedding failure after a test run on the sealing ring of a certain type of engine turbo disk was analyzed. The verification test was carried out based on the coating technology and the working principle of the engine. The results show that the paint surface treatment process is reasonable, the test piece in the static conditions of 660 ~ 720 ℃ does not occur blistering and shedding paint; engine during operation hot fuel vapor adhesion and airflow erosion, is Causes the paint layer to foam and peel off.