机械密封摩擦副界面温升分析

Analysis of Interface Temperature Rise of Friction Pairs of Mechanical Seals

以接触式机械密封密封环为研究对象,建立摩擦副密封环整体传热模型,通过热-结构耦合模拟与数值计算,得到摩擦副的温度分布以及不同工况条件下摩擦副的变形情况。研究结果表明:密封环最高温度与最大热流密度都集中在密封环靠近摩擦副的内径处;密封介质压力和弹簧比压增大,摩擦副闭合力增大,微凸体接触增加,使得摩擦副变形量增加;随着转速的增加,摩擦副端面逐渐打开,微凸体对开启力的作用减小,使得摩擦副的变形减小。

Taking the contact mechanical seal ring as the research object,the whole heat transfer model of the seal ring was established,the temperature distribution of the friction pair and the deformation of the friction pair under different working conditions were obtained through the heat-structure coupling simulation and numerical calculation.The results show that both the maximum temperature and the maximum heat flux of the sealing ring are concentrated in the inner diameter of the sealing ring near the friction pair;when the specific pressure of seal medium and spring increases,the closing force of the friction pair increases and the contact of micro-convex body increases,which makes the deformation of friction pair increase;with the increase of rotational speed,the end face of the friction pair is gradually opened,and the effect of micro convex body on the opening force decreases,which makes the deformation of friction pair decrease.