涡轮转子H形叶片叶尖间隙测量

叶尖间隙是燃气轮机中的一个重要性能参数和安全监测参数。现代燃气轮机中采用H形凹腔冷却涡轮叶片,该叶片具有单叶片双间隙的特点。利用电容式叶尖间隙测量系统,通过改进算法,实现了H形叶片的叶尖间隙测量,并成功应用于H形叶片涡轮级性能试验。试验录取了三种不同设计间隙下的实际叶尖间隙变化数据,分析了叶尖间隙与涡轮性能之间的关系,并对试验中的转子异常运动进行了成功监测。

H-Form Blade Tip Clearance Measurement in Turbine Rotor

Tip clearance is an important parameter of performance and safety monitor in gas turbine.The H-form blade which is characterized with two tips has been used in modern gas turbines.Software that can calculate tip clearance of H-form blade was developed based on hardware of the capacitance tip clearance measure system,and had a good impression in a turbine experiment.Tip clearance data of three different designs were collected in experiments.The relationship between turbine performance and tip clearance was analyzed,and an abnormal state of turbine was monitored successfully in the experiment.