基于热传导角的机械密封环温度分布计算方法

Calculation Method of Mechanical Seal Temperature Distribution Based on Heat Conduction Angle

机械密封端面温度分布是影响机械密封性能的一个重要因素,端面温度近似解析计算能够很容易地分析温度对密封的影响。热量以热传导形式在动静环内部传递,在动静环与介质接触区域以对流传热形式进行传递,同时考虑明确定义的热传导角,热量在动静环上的分配,基于热传导理论,获得一种确定动静环内部温度分布的计算方法。对比分析解析计算结果与数值模拟结果,表明近似解析解与数值模拟计算结果的温度平均误差均随端面距离和半径的增加呈下降趋势。

The temperature distribution on the end faces of the mechanical seal is an important factor which affects the sealing performance. The approximate analytical calculation of the end face temperature can analyze the effect of tempera- ture on sealing performance easily. In the inner parts of the rotor and static rings, heat transfers in the form of heat conduction,while in the contacting area of the rings and the medium, heat transfers in the form of convection. Considering the clearly defined heat conducting angle, and heat distribution in the rotor and static rings, a formula calculating the inner temperature distribution of the rotor and static rings was derived based on the heat conducting theory. The calculating re- suits were compared with the numerical simulation results. The results show that as the end faces distance and the radius increase, the average errors of the temperature between the approximate analytical calculation and the numerical simulation results will decrease.