大型汽轮发电机转子护环热套应力测试技术研究

Stress Determination about Heat Sleeve of Rotor Retaining Ring in Large Turbogenerator

本文简要介绍了高温应变测量原理和技术在大型汽轮发电机转子护环热套应力测试中的成功应用.在现场测试工作中摸索出的热应力测试技术和方法是行之有效的,而且获得了满意的试验成果,探明了护环热套应力随温度变化的分布规律,为护环热强度性能和损伤机理的深入研究提供了实验依据.这一成功的测试技术,具有较大的工程意义.

The technique and its principle of high temperature strain measurement are introduced to determine heat sleeve stress about rotor retaining ring of large turbogenerator.This method is very effective and has been applied in site measurement with satisfactory experimental results.The relation between heat sleeve stress and temperature is found.These can be served for further study of heat strensth and damage mechanism of retaining ring.