摘要
分析了影响机械密封环端面变形的主要因素,说明了密封环对介质的传热系数及端面热通量的计算方法.对于高速重载机械密封,因密封环端面热通量大,其热变形显著高于力变形.当密封环模型一定时,按正交设计法给出若干端面热通量值作为输入样本,并将有限元法计算得出的端面内径和外径处的相对轴向变形Δz作为输出样本,训练3层BP人工神经网络,对该密封环端面的轴向热变形进行精确预测.正交设计法和人工神经网络方法相结合是密封环端面热通量与热变形之间高度非线性关系分析的有效方法.
The major factors, which correlate with the end face deformation of the mechanical seal ring, were analyzed. The method to calculate the coefficient of heat transfer between seal ring and medium, and the method to calculate the heat flux exerted on the end face were presented. For the high speed and overload mechanical seal, thermal deformation is much more remarkable than the deformation caused by pressure, For a given seal ring model, it is possible to train a three-layer back propagation artificial neural network （BP ANN） to accurately forecast the relative thermal deformation △z between outer diameter and inner diameter on the end face of the seal ring. The input samples were the heat flux values exerted on the end face of the seal ring and giren by the orthogonal design method. The output samples were the values of Az that were calculated by the finite element method. By means of BP ANN and the orthogonal design method, the high degree nonlinear relationship between heat flux and thermal deformation of the end face of the seal ring could be analyzed satisfactorily.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第12期2902-2907,共6页
CIESC Journal
关键词
机械密封
热变形
正交设计法
BP
ANN
mechanical seal
thermal deformation
orthogonal design method
BP ANN
