一种排除带凸肩风扇叶片榫头故障的新方法

探索了一种采取黏弹性橡胶阻尼器抑制带凸肩风扇工作叶片共振的新途径,通过应用于某型机风扇第1级叶片,在叶片结构不变的条件下排除了其榫头断裂故障。在发动机上的验证结果表明:根部橡胶阻尼器减振结构对叶片榫头出现最大振动应力的振型的抑制效果明显,从而拓展了黏弹性材料的应用领域。

New Technique for Eliminating Fault of Tenon of Fan Blade with Mid-Span Shroud

A viscoelastic rubber damper is developed to damp resonance of the fan blade with mid - span shroud. The technique has been applied to the first stage fan blade in a turbofan engine, and therefore the fracture of blade tenon is avoided under existing structure conditions. The results of engine test indicate that the root rubber damper produces significant effects in damping the mode of maximum vibration stress of the tenon, thus the usage of the viscoelastic material is expanded.