摘要
压缩机叶轮叶根易出现疲劳裂纹、气孔等内部缺陷。基于超声脉冲反射法原理,利用相控阵超声检测技术,采用声线模型对缺陷检测位置进行分析,并通过声场分布模拟以及缺陷检测模拟优化实验方案,最后利用聚焦扫描对人工预置平底孔缺陷进行检测。检测结果表明:利用相控阵超声检测技术在叶轮内腔对叶根进行检测,缺陷信号明显,缺陷定位精度高,定位误差仅为0.19%。
Compressor impeller blade root was easy to occur fatigue cracks, holes and other inter- nal defects. Based on the principles of ultrasonic pulse reflection and phased array ultrasonic method, the testing positions of blade root defects were analysed by voice model, and the experimental plan was optimized with sound field simulation and defect testing simulation. An experiment of artificial flat bottom hole defect testing was made by focus scanning. The results show an evident defect signal of blade root is found by phased array ultrasonic testing when scanning through impeller internal. The defect location error is only 0.19% which shows a high accuracy.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2015年第18期2436-2441,共6页
China Mechanical Engineering
基金
国家重点基础研究发展计划(973计划)资助项目(2011CB013403
2011CB013405)
关键词
叶轮
叶根
相控阵超声
缺陷检测
impeller
blade root
phased array ultrasonic
defect testing
