重载RV减速器的摆线针轮疲劳寿命预测

Fatigue Life Prediction of Cycloid Needle Wheel for Heavy Load RV Reducer

以某型重载RV减速器中的摆线针轮为研究对象,利用有限元分析软件建立轮齿接触等效模型,得到了摆线轮齿面的接触应力分布并分析了其最大接触应力区,基于刚柔耦合动力学建模,得到了最大接触应力区的应力-时间历程。采用疲劳累计损伤理论,基于疲劳寿命专用仿真软件,以有限元结果和载荷谱为输入,分析了摆线针轮在相应外部循环载荷作用下的最终寿命,研究结果表明:摆线轮最大应力部位和危险部位在分度圆附近且靠近端面,最大应力为817 MPa,疲劳寿命为106.673次,等效寿命为5 233 h,为摆线轮的抗疲劳优化设计提供了参考价值。

Taking the cycloid needle wheel ofthe heavy load RV reducer as the research object,the finite element analysis software is used to establish the gear tooth contact equivalent model,and the contact stress distribution of the cycloid wheel tooth surface is obtained and its maximum contact stress area is analyzed.Based on the rigid-flexible coupling dynamics modeling,the stress-time history of the maximum contact stress area is obtained.In terms of the fatigue cumulative damage theory,the final life of the cycloid needle wheel under the corresponding external cyclic load is analyzed with the finite element results via special fatigue life simulation software and load spectrum as input.The results show that the maximum stress position of the cycloid wheel and the dangerous part is near the index circle and close to the end face,the maximum stress is 817 MPa,the fatigue life is 106.673 times,and the equivalent life is 5233 h,which provides the reference value for the anti-fatigue optimization design of the cycloid wheel.