旋转轴唇型密封圈的寿命预测研究

提出基于ABAQUS软件和疲劳分析软件FE-SAFE预测旋转轴唇形密封圈寿命的方法。以某型号减速器中的输入轴与轴承端盖间的旋转轴唇形密封圈为研究对象，通过构建预紧状态下旋转轴唇形密封圈的有限元模型，获得旋转轴唇形密封圈的过盈量和理论接触宽度与唇口最大接触压力之间的关系曲线；根据ABAQUS获得的应力，并结合材料应力-循环次数曲线，应用疲劳分析软件FE-SAFE,预测不同过盈量和理论接触宽度对旋转轴唇型密封圈循环寿命的影响，并验证预测方法的有效性。结果表明：旋转轴唇型密封圈的循环寿命随过盈量的增大而减小，随理论接触宽度的增大而增加；综合考虑油封的密封能力与循环寿命，当过盈量在0.35～0.45 mm之间、理论接触宽度在0.3～0.5 mm之间取值时，该旋转轴唇型密封圈的循环寿命较高。

Research on Life Prediction of Rotary Shaft Lip Seal Ring

Based on ABAQUS software and fatigue analysis software FE-SAFE,the life prediction method of rotary shaft lip seal ring was proposed.The rotary shaft lip seal ring between the input shaft and the bearing end cap in a reducer was taken as the research object,the finite element model of the rotary shaft lip seal under the pre-tightening condition was constructed,the relationship curves between the interference and theoretical contact width of the oil seal and the maximum contact pressure of the lip were obtained.According to the stress obtained by ABAQUS and the material stress-cycle times curves,the fatigue analysis software FE-SAFE was used to predict the influence of different interference and theoretical contact width on the cycle life of the rotary shaft lip seal,and the effectiveness of the prediction method was verified.The results show that the cycle life of rotary shaft lip seal decreases with the increase of interference,and increases with the increase of theoretical contact width.Comprehensively considering the sealing capacity and cycle life of the oil seal,when the interference value is between 0.35 mm and 0.45 mm and the theoretical contact width is between 0.3 mm and 0.5 mm,the cycle life of this rotary shaft lip seal ring is higher.