某型飞机螺旋桨动密封结构设计及仿真

Structural Design and Simulation of a Propeller Dynamic Seal of an Aircraft

变桨距螺旋桨是涡轮螺旋桨飞机的重要组成部分,其动密封系统性能直接影响着飞机运行的效率及安全。因此,开展螺旋桨桨根动密封系统的设计与研究具有重要工程实际意义。该文针对螺旋桨变桨距时的往复摆转运动特点,设计出一种橡塑组合密封结构,并采用数值仿真和试验测量相结合的手段,对该组合密封系统开展研究。最终的数值仿真和试验测试表明,所设计的橡塑组合密封系统符合螺旋桨动密封系统的使用要求,未产生泄漏情况,可有效提升螺旋桨密封系统的可靠性,具有重要的工程指导价值。

Variable pitch propellers are an important part of turboprop aircraft,and the performance of their dynamic sealing system directly affects the efficiency and safety of aircraft operation.Therefore,carrying out the design and research of the propeller root dynamic sealing system has important engineering practical significance.In this paper,a rubber-plastic combined sealing structure is designed based on the characteristics of reciprocating swinging motion of the propeller when changing pitch,and the combined sealing system is studied by means of numerical simulation and experimental measurement.The final numerical simulation and experimental testing show that the designed rubber-plastic combination sealing system meets the use requirements of the propeller dynamic sealing system and produces no leakage,which effectively improves the reliability of the propeller sealing system and has important engineering guidance value.