某型航空发动机燃烧室外套超声检测换能器的设计

DESIGN OF ULTRASONIC TESTING TRANSDUCER FOR THE COMBUSTION CHAMBER COAT OF AN AEROENGINE

用超声表面波法检测某型航空发动机燃烧室外套裂纹,需要设计专用换能器。根据外套壁厚和裂纹位置特点,提出了专用超声换能器的设计关键在于工作频率和晶片倾斜角。由理论分析和试验,给出了最佳灵敏度时换能器的工作频率和晶片倾斜角,实际应用效果良好。

Transducer was important in ultrasonic testing of the combustion chamber coat of an aeroengine. It was pointed out that the keypoint in designing the special transducer was its working frequency and crystal angle according to the coat thickness and flaw location. The working frequency and crystal angle for optimal sensitivity were obtained by theoretic analysis and experiments. Its practical application was satisfactory.