干耦合超声检测技术在某火箭发动机喷管在役检测中的应用

摘要

应用干耦合超声检测方法对某火箭发动机喷管进行了在役检测试验,验证了干耦合超声检测技术对该火箭发动机喷管的在役检测能力.结果表明,干耦合超声检测方法能够有效地检测出该型号发动机喷管中φ 20 mm以上的脱粘缺陷,满足在役检测要求.自动与手动,两种检测方法的检测能力相当,但在操作方式和工作效率等方面各有优劣.%In order to study the feasibility of the in-service dry coupling ultrasonic test technology for rocket jet,the principle of the dry coupling ultrasonic testing was analyzed,and both the manual and automatic testing methods were applied to test the rocket jet specimen and the rocket jet parts in service.The results show that the debond defect,whose normal size is larger than 20mm,can be found using the two kinds of the dry coupling ultrasonic testing methods.It satisfies the quality request of the rocket jet being tested in service.It is the same to the manual testing and automatic testing in the ability of finding defect.And there is difference between the two testing methods in the operation and efficiency.The study is useful for testing rocket jet in service.