DN350锁渣阀密封结构有限元分析

The Finite Element Analysis of the Sealing Structure of Lock Slag Valve DN350

采用有限元分析方法对DN350锁渣阀不同密封面夹角和密封面宽度的密封结构进行开启、闭合过程的仿真模拟。分析讨论了密封面夹角和密封面宽度对密封结构受力的影响,以及密封结构的应力场、应变场分布规律。结果表明,密封面夹角和密封面宽度对密封结构应力场、应变场的分布产生明显影响;密封面夹角45°、密封面宽度17.5mm密封结构为理想结构,最大等效应力为446.08185MPa,位于进口端阀座下方密封面内径,密封结构整体等效应力均低于材料屈服强度450MPa,不会发生塑性变形;最大应变为0.00111,位于进口端阀座下方密封面中径。

The finite element analysis method was used to simulate the opening and closing process of the different sealing angle and the sealing surface width of the DN350 lock slag valve’s sealing structure.The influence of the angle and the width of sealing surface on the force of sealing structure,and the distribution of stress field and strain field of the sealing structure were discussed and analyzed.The result showed that the angle and the width of sealing surface had a significant impact on the distribution of stress field and strain field of the sealing structure.The sealing surface angle of 45°and the sealing surface width of 17.5mm offered the most ideal sealing structure,and the maximum equivalent stress of the ideal sealing structure was 446.08185MPa,locating in the inner diameter of the sealing surface below the inlet valve seat.The overall equivalent stress of the sealing structure was lower than 450MPa,the material yield strength,and there was no plastic deformation.The maximum strain was 0.00111,which located in the middle diameter of the sealing surface below the inlet valve seat.