机械密封摩擦副界面热流固耦合分析

The thermal fluid and solid coupling analysis on the friction surface of mechanical seal

在符合工况的试验条件下,以对流换热数值计算理论为基础,利用FLUENT完成对流换热系数的数值计算。通过流固耦合分析,得到流固交界面的第二边界条件分布,将所求值作为边界条件,代入热传导方程,利用ANSYS软件计算得到密封端面温度场的分布规律。利用数值法求解对流换热系数,得到各项重要参数对换热过程的影响,补充了实验法的不足。研究了介质流量、转速两个重要参数对对流换热系数及密封环摩擦副界面温度场分布的影响,为改善机械密封端面工作情况提供了一种新的研究方法。

Under the experimental conditions with convective heat transfer numerical calculation based on the theory,it applies numerical methods to realize fluent calculation of convective heat transfer coefficient.The thermal fluid and solid coupling analysis obtains the distribution of accurate fluid-solid interface in a second boundary condition.Taking the obtained value as the boundary condition,it analyzes the heat conduction equation,simulates seal face temperature field in ANSYS.Comparing experimental and numerical methods for solving the convective heat transfer coefficient,it obtains a realistic conditions and more accurate temperature distribution.Based on the seal ring friction interface loads at different temperatures,it simulates different media flow velocity,temperature distribution and thermal deformation distribution at different speed,and the temperature of the seal cavity media distribution.