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汽轮机转子表面温度是对其进行高温蠕变损伤分析及转子热应力、热疲劳分析的关键数据之一,为解决精确测量汽轮机转子表面温度的难题,通过理论与试验相结合研究了热电偶和光纤等接触式测量、红外辐射式非接触测量等不同方法的特点,及转子旋转、振动对红外方式测温的影响.结果表明:采用传统热电偶等接触式方式测量转子表面温度存在响应时间长、信号引出困难等固有缺陷;红外测温响应速度快,能够在一定程度上较准确地测量汽轮机转子的表面温度并且能长期对转子表面温度进行在线监测,转子的旋转及振动对红外测温系统影响很小.
Turbine rotor surface temperature is one of the key data to analyze creep damage at high temperature and thermal stress and thermal fatigue of rotor. To solve the problem of accurately measuring the rotor surface temperature of steam turbine, the thermocouple and fiber Such as contact measurement, infrared radiation non-contact measurement, and the influence of rotor rotation and vibration on the infrared temperature measurement.The results show that: the traditional thermocouple and other contact methods to measure the rotor surface temperature has a long response time, Signal lead-out difficulties and other inherent defects; infrared temperature measurement response speed, to a certain extent, more accurately measure the turbine rotor surface temperature and long-term rotor surface temperature on-line monitoring, rotor rotation and vibration on the infrared temperature measurement system Very small.