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Study on Ultrasonic Testing Technology for Motor Bolt in Service

Author: LuYiFeng
Tutor: LiuQingYan
School: East China University of Science and Technology
Course: Safety Technology and Engineering
Keywords: Ultrasonic testing Failure Analysis Motor bolts detection Double-crystal transducer Ultra-thin transducer
CLC: TM31
Type: Master's thesis
Year: 2012
Downloads: 21
Quote: 0
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Abstract


The motor pole stopper bolt a direct impact on the quality of performance and safe operation of the generator , it is necessary to in-service non-destructive testing of the bolts . This paper studies the bolts nondestructive testing technology , especially ultrasonic detection technology . Through the analysis of the structural characteristics of the motor pole stopper bolt and application characteristics , proposed an effective and feasible ultrasonic in service inspection program , and designed a special ultrasound transducer formulate the detection process , to achieve a reliable detection of the bolt cracks class defects . This paper developed by analyzing the characteristics and conditions of the motor bolts , bolt hexagonal space double crystal transducer detection methods and the end face of a small space within the ultra-thin transducer detection methods . Through the the detected experimental results showed that: the former bolt root cracks good sensitivity , but poor thread defects detection effect ; latter good crack detection effect within the thread , but poor roots crack detection signal-to-noise ratio of the bolts . The combination of the two detection methods can effectively found more cracks in the the bolt surface depth 1mm meet bolts testing requirements . The results of the relevant type of testing and R \u0026 D is a good reference value .

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CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,)
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