基于应力分布的直升机传动齿轮故障辨识实验

Fault identification experiment of helicopter transmission gear based on stress distribution

直升机设计定型试飞过程中,减速器作为直升机传动系统中非常重要的部件,其性能的优劣对于直升机的安全性有很大的影响。减速器的齿轮传动系统通常是工作在高速、高温、重载等恶劣环境,同时由于传动齿轮本身结构复杂性,易导致轮齿结构会出现断齿、剥落等故障,严重影响直升机传动系统的稳定性和可靠性。本文通过对减速器传动齿轮典型故障辨识,结合有限元分析、齿轮啮合等理论,建立直升机中减速器齿轮传动有限元模型,分析传动齿轮典型故障下应力分布和变化,为直升机传动系统故障监控测试技术提供一种新思路。

n the process of helicopter design finalization flight test,the reducer is a very important component in the helicopter transmission system,and its performance has a great impact on the safety of the helicopter.The gear transmission system of the reducer usually works in high speed,high temperature,heavy load and other harsh environments.At the same time,due to the complexity of the transmission gear itself,it is easy to cause gear tooth structure to break,peel and other failures,which seriously affects the stability and reliability of the helicopter transmission system.In this paper,through the identification of typical faults of the transmission gear of the reducer,combined with the theory of finite element analysis and gear meshing,the finite element model of the reducer gear transmission in the helicopter is established,and the stress distribution and change under the typical fault of the transmission gear are analyzed,which provides a new idea for the fault monitoring and testing technology of the helicopter transmission system.