复杂空心精铸叶片残芯检测技术

Residual Core Detection Technology for Complex Hollow Precision Casting Blades

空心涡轮发动机叶片中的残芯直接影响叶片的散热,进而影响到发动机的性能和安全,残芯检测技术是发动机制造的关键技术之一。本文针对具有复杂内部气冷通道的航空发动机整铸涡轮工作叶片存在型芯残留难以检测的问题,对冷光源、柔性光纤内窥镜、水流、X射线、中子成像法、工业CT、叶片内腔填充金属粉结合X射线及示踪剂X射线检测技术进行了应用研究及评价。

Residual cores in hollow turbine engine blades directly affect the heat dissipation of the blades,thereby affecting the performance and safety of the engine.Residual core detection technology is one of the key technologies in engine manufacturing.This article focuses on the problem of difficult detection of core residues in integral cast turbine blades of aircraft engines with internal gas cooling channels.The application research and evaluation of cold light sources,flexible fiber optic endoscopes,water flow,X-ray,neutron imaging methods,industrial CT,metal powder filling in the blade cavity combined with X-ray and tracer X-ray detection technology were conducted.