水轮机涡轮螺栓多通道超声波应力智能监测系统

详细信息

Intelligent stress monitoring system based on multi-channel ultrasonic wave for turbine bolts

1. State Grid Zhejiang Jinshuitan Power Plant, Lishui 323000, China;
2. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China

摘要: 水轮机上下蜗壳连接35CrMo钢螺栓,利用35CrMo钢螺栓的超声波声时比与轴向应力之间满足良好的线性关系这一规律,依据FPGA技术及数据算法,构建了一套24通道的超声波应力智能监测系统。该测定系统由一台超声波仪、24个压电式探头、一台通道转换器、一台显示和控制工控机组成,可同时检测24个螺栓的实时弹性应力,实现实时应力的测定。利用该系统进行了实际轴向应力的测定,结果表明,其误差完全可以满足工程要求。
- 超声波检测 /
- 轴向应力 /
- 35CrMo /
- 水轮机
Abstract: The upper and lower volutes of the water turbine are connected with 35CrMo steel bolts. By utilizing the linear relationship between the ultrasonic acoustic-time ratio of 35CrMo steel bolts and axial stress, a 24 channels ultrasonic stress intelligent monitoring system was constructed based on FPGA technology and data algorithms. The system consisted of an ultrasonic instrument, 24 piezoelectric probes, a channel converter, a display and control industrial computer, It can simultaneously detect the real-time elastic stress of 24 bolts, achieving real-time stress measurement. And the actual axial stress was measured using this system, and the results showed that the error could fully meet the engineering requirements.
- ultrasonic testing /
- axial stress /
- 35CrMo /
- water turbine

[1]	惠晶.新能源发电与控制技术[M].2版.北京:机械工业出版社,2012.
[2]	骆国防.电网设备超声检测技术与应用[M].上海:上海交通大学出版社,2021.
[3]	刘元秀,张光蓉.俄罗斯萨彦-舒申斯克水电站事故及启示[J].四川水力发电,2013,32(5):133-139.
[4]	江泽涛.温度对超声波波速及应力测量的影响[J].无损检测,1999,21(6):245-248.
[5]	贺玲凤,刘军.声弹性技术[M].北京:科学出版社,2002.
[6]	陈远林.基于声弹性效应的航空发动机螺栓连接装配应力测量方法研究[D].哈尔滨:哈尔滨工业大学,2021.