中文摘要：

建立了机械密封热一结构耦合计算的数学模型并给出详细的求解边界条件，推导了密封端面开口间隙与端面液膜压力的函数关系。利用离散节点加载的方法完成了对应工况下端面液膜压力的加载，给出了弹簧作用力的交变函数表达形式，通过与载荷时间结合的动力学瞬态分析，获得了密封端面的温度和压力等特性参数。结果表明，瞬态分析中密封端面各特性在多数时刻点仍表现出与稳态相似的特征，端面局部接触且其处于高温区，静环与动环端面分离并呈一定形式的锥形开口形状；随时间变化的弹簧比压，改变了密封装置的受力状况。使端面的温度、接触压力等特性呈现出交变的瞬态特征。

英文摘要：

In the article, one mathematical model with given boundary conditions in detail was established to solve the question about the transient thermal-structure coupling characteristics of the mechanical seals end faces. The function expression was derived between the opening gap and fluid film pressure on the seals end faces. The fluid film pressure under the corresponding condition was loaded by the way of the discrete nodes loading in the computational program. The spring force was expressed in the form of some given alternative function. Combined with the time-history dynamic and transient analysis, some characteristics such as temperature and pressure and other parameters were achieved. The results indicate that in most of computational time, seals end faces characteristics investigated in the transient analysis are similar to those in the steady analysis. There are contact areas and higher temperature exiting on the local seals end faces. The seals end faces of static ring and rotating ring separates each other and present the shape of some form of tapered opening. With the time-varying spring ratio pressure which changes the force loaded on the sealing device, seals end faces characteristics such as temperature and contact pressure and so on are all alternate and transient, too.