Fretting Cracking Ultrasonic Detection in Generator Teeth
This paper presents an ultrasonic inspection of fretting cracking in generator teeth. Access restriction to the fretting surface to be inspected is applied. The angle between the fretting surface and the top surface of a tooth where ultrasonic transducer rests is varied dependent on the manufacturer and the mode of the power generator. A model has been developed which allows quick calculation of the optimum orientation of an ultrasonic transducer of a specific beam angle for a fretting crack of a specific orientation. This model has been verified by experimental measurements. This work is very useful for the design of an array of transducers for automatic one-pass ultrasonic inspection of rotor tooth fretting cracking.
Fretting cracking phased array transducer transducer array
Xiaoming JIAN Shaun SMALLEY Jim KNOWLES Roland MOSER Karl QUIRK
Phoenix Inspection System Ltd, Warrington, UK R&D Inspection Technologies, ALSTOM Power Service, Switzerland
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
708-715
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）