船舶尾轴机械初始力变形对密封温度场的影响分析

Analysis of the effect of initial force deformation of ship stern shaft machinery on sealing temperature field

在船舶尾轴密封温度场中,应用传统分析方法无法考虑初始力变形对温度场影响,导致分析结果存在严重误差,为弥补传统分析方法的不足,在传统方法的基础上进行优化。对尾轴上的端面变形结构进行计算,在此结构上建立密封环初始力变形方程,由此得出影响密封温度场的因素,在不同因素的影响下,利用有限元方法对密封空间中的温度场进行计算。使用优化分析方法进行实验,发现初始力变形程度越强,密封温度场内的温度越高,平均误差值与传统分析方法相比低了4.3。

In the temperature field of ship stern shaft seal,the influence of initial force deformation on temperature field can not be considered by traditional analysis method,which results in serious errors in the analysis results.In order to make up for the shortcomings of traditional analysis method,the traditional analysis method is optimized on the basis of traditional method.The end deformation structure of the stern shaft is calculated,and the initial force deformation equation of the sealing ring is established on the structure.The factors affecting the temperature field of the sealing ring are obtained.Under the influence of different factors,the temperature field in the sealing space is calculated by finite element method.The results show that the higher the initial force deformation is,the higher the temperature in the sealing temperature field is,and the average error is 4.3 lower than that of the traditional analysis method.