大型低温压缩机碳纤维叶片样件设计及性能研究

Design and performance testing of carbon fiber strengthened composites blade for cryogenic compressor

针对某低温风洞压缩机叶片性能需求,确立了叶片树脂配方和固化工艺,设计并制造了0.6缩比低温碳纤维叶片样件,进行了挥舞刚度、叶根联接强度、高低温固有频率及低温疲劳性能等测试。结果表明:低温碳纤维叶片77 K低温冲击韧性优于70 kJ/m2,叶根联接强度优于1.5倍最大离心力载荷,疲劳寿命高于10万次挥舞加载循环,在77~323 K的宽温域内具有良好的综合力学性能。提出的低温碳纤维叶片设计准则、基体材料、制造工艺和测试方法满足大型低温压缩机碳纤维叶片研制需求。

Aimming at the performance requirements of a cryogenic wind tunnel compressor blade,the resin formula and curing process of the vanes were established,and the O.6 ratio cryogenic carbon fiber blade was designed and manufactured.The brandishing stiffness,blade root joint strength,high and low temperature natural frequency and cryogenic fatigue performance were tested.The results show that the carbon fibre strengthened composites prototype has good cryogenic performance,including preceded 70 kJ/m²impacting toughness on 77 K temperature,upper 1.5 times maximun centrifugal force blade root strength and more than 100 thousands cryogenic fatigued life,and it has good comprehensive mechanical properties in a wide temperature range of 77~323 K.The design criteria,matrix material,manufacturing process and testing method of the cryogenic carbon fiber blades proposed meet the development requirements of large cryogenic compressor carbon fiber blades.