流量控制阀K形金属密封圈结构参数优化

Optimization of Structural Parameters for K-shaped Metal Sealing Ring of Flow Control Valve

流量控制阀K形金属密封圈结构参数较多,且不同结构参数对密封性能影响程度存在较大差异。以密封面接触压力、密封面有效接触长度及最大Mises应力为约束条件,采用正交试验设计研究影响K形金属密封圈密封性能结构参数之间的主次关系,确定了唇部长度、悬臂内张角与悬臂厚度3个因素作为响应曲面法的设计变量;通过正交试验和回归分析得到接触压力、最大等效应力及有效接触长度与设计参数关系的二次回归方程,并基于响应面法对密封结构进行优化分析。优化后K形金属密封圈的接触压力增加了8.09%,有效接触长度增加了14.73%,最大等效应力减少了13.44%,表明优化后K形金属密封圈密封面接触压力分布更加均匀,有效提高了金属密封圈的密封性能。

There are many structural parameters for the K-shaped metal sealing ring of the flow control valve,and there are significant differences in the degree of influence of different structural parameters on the sealing performance.Taking the contact pressure of the sealing surface,the effective contact length of the sealing surface,and the maximum Mises stress as constraint conditions,orthogonal experimental design was used to study the influence of structural parameters on the sealing performance of K-shaped metal sealing rings.Three factors,namely lip length,cantilever internal angle,and cantilever thickness,were determined as design variables for the response surface method.The quadratic regression equations of the relationship between contact pressure,maximum equivalent stress,effective contact length and design parameters was obtained through orthogonal experiments and regression analysis,and the sealing structure was optimized and analyzed based on the response surface method.After optimization,the contact pressure of the K-shaped metal sealing ring increases by 8.09%,the effective contact length increases by 14.73%,and the maximum equivalent stress decreases by 13.44%,indicating that the contact pressure distribution on the sealing surface of the K-shaped metal sealing ring is more uniform after optimization,and the sealing performance of the metal sealing ring is effectively improved.