航空发动机高温包覆热电偶研制

为实现高温条件下发动机内部部件的温度测试,研制了1种耐温1500℃的高温包覆热电偶。通过对其进行结构设计、材料选取、包覆工艺的研究,确定了1500℃高温包覆热电偶的材料及制作方法。通过耐高温试验、绝缘电阻试验、相容性试验及检定校准与验证,证明了1500℃高温包覆热电偶的发动机测温工程实用性。将包覆热电偶使用温度提高到1500℃,可以部分代替铠装热电偶,解决发动机内部一些高温部件和复杂结构细径铠装热电偶无法测量的难题。

Investigation on High Temperature Coated Thermocouple for Aeroengine

In order to realize temperature measurement of the internal pans inside engine under high temperature,a high temperature thermocouple with high temperature resistance of 1500℃ was designed.The material and making method of the thermocouple were determined through structural design,material selection and cladding technology.After a series of temperature test,insulation resistance test,compatibility test and calibration and verification test,the practicality of engine temperature measurement engineering was proved.This kind of thermocouple will raise the operating temperature of coated thermocouple to 1500 ℃.It can partially replace armored thermocouple,and solve the problem that can't be measured by some internal high temperature comperature components of engine and small-diameter armored thermocouple with complex structure.