航空发动机高导叶片水流量测试系统改进研究

Research on Improving Testing System for the Water Flow of Aeroengine High-pressure Turbine Guide-vanes

针对某型航空发动机高导叶片水流量测量稳定性和准确性较差的现状,对水流量测试系统中的试验器增加了闭环控制系统和当量回路,将密封垫由进气孔边缘局部封严改为叶片上下缘板整体橡胶垫封严,夹具由原来的两个进水口改为四个进水口,并对空气导管装配工艺进行了优化。对改进后的测试系统进行了测试试验,结果表明:改进后的测试系统测试压力稳定、密封效果好,重复测量误差和测量分散度均满足高导叶片水流量测量设计要求,并有效提高了测试效率。

A testing system was improved as for the poor stability and accuracy in the water flow test of one aeroengine high-pressure turbine guide-vane. A closed-loop control system and one equivalent circuit were added to the testing device,the seal changed from partial seal around the air intakes to the overall seal covering the up and down edge of the blade,the fixture had four intakes instead of the original two,and the assembly process of air duct was optimized. The testing system after being improved was tested,and it proves that the testing pressure stability and good sealing are achieved,and the repeated measuring error and the dispersion degree of measuring both meet the design requirements as well as testing efficiency is effectively improved.