填料密封预紧应力与磨损量和泄漏量的映射模型

核电因其辐射性,对相关设备密封要求高。填料密封是广泛用于核电机械中孔轴配合之间的动密封方式。填料密封的预紧力越大,密封效果越好,但磨损速度也会增大,使用寿命随之降低。因此通过研究预紧力与密封介质泄漏率和密封材料磨损率之间的关系,建立不同预紧应力对密封介质泄漏和密封材料磨损的映射关系模型,基于实验数据对该模型关键参数进行识别,得到磨损量和泄漏量的最终模型,通过实验对修正模型的准确性进行了验证。

Mapping model of packing seals preload on wear and leakage

Nuclear power has high requirements for related equipmentdue to its radioactivity. Packing seal is a dynamic sealing method widely used in nuclear power machinery between holes and axles. The greater preload force on the packing seal, the better the sealing effect, but the wear rate will increase, shortening the service life. Therefore, the study of the influence of preload on wear and leakage has been analyzed in this paper. The mapping model for determining the relationship between preload and the leakage rate, as well as the service life were established. The key parameters of the model were identified based on experimental data. The final model of wear and leakage was obtained. Finally,the accuracy of the revised model was verified by experiments.