一种汽轮机转子的热应力测试系统

A Test System for Measuring Thermal Stresses in Turbine Rotors

介绍一种测量汽轮机转子热应力的系统。该系统中采用了一种测差法,该方法减小了测量中模数转换器的量化误差的影响,提高了温升率测量的准确度和热应力计算的准确度。同时,该系统把所测的热应力以4～20mA的形式输出,供其它系统分析。

This paper focuses on a new system for measuring turbine rotor thermal stresses. The use of a difference measuring method for the system can reduce the influence of quantization error of A/D converter, thereby increasing the measurement accuracy of the temperature rise rate and enhancing the accuracy of thermal stress calculation. In addition, the system on the basis of a measured thermal stress gives an output in the form of 4 20 mA to other systems for analysis, accumulating relevant data for computing turbine service life later on.