基于响应面法的全焊接球阀密封结构参数多目标优化  

Multi-objective optimization of sealing structure parameters of all-welded ball valves based on response surface method

作　　者：高俊峰 李伟 杨玲玲 张建斌 冯玉林 明友 GAO Junfeng;LI Wei;YANG Lingling;ZHANG Jianbin;FENG Yuling;MING You(Hefei General Machinery Research Institute Co.,Ltd.,Hefei 230031,China)

机构地区：[1]合肥通用机械研究院有限公司,安徽合肥230031

出　　处：《机电工程》2023年第11期1718-1726,共9页Journal of Mechanical & Electrical Engineering

基　　金：国家重点研发计划项目(2018YFB2004002)。

摘　　要：针对全焊接球阀密封性欠佳的问题,以NPS16 Class600型球阀为例,对其密封结构的密封性能进行了理论推导、仿真分析和试验验证,并基于响应面法对密封结构参数进行了多目标优化设计。首先,利用试验设计法(DOE)及响应面法(RSM)建立了密封结构的优化模型,对密封结构进行了静力学分析;然后,搭建了试验平台,进行了密封结构的开口度测试,并根据测试结果对仿真分析结果进行了验证;利用ANSYS软件对浮动球球阀密封结构进行了静力学分析,并研究了球体的直径(d_(1))、阀座的厚度(D_(7))、中径(D_(10))、倒角(D_(A))对其密封性能的影响;最后,根据响应面优化(RSO)模块对密封结构参数进行了多目标优化设计,进一步验证了其优化效果及密封性能。研究结果表明:D_(10)对最小间隙值(C_(min))的影响显著性最高,d_(1)对最大等效应力(S_(1max))的影响显著性最高;在密封结构两参数耦合作用下,DA与D7对最小间隙值(C_(min))的影响显著,D_(A)与d_(1)对最大等效应力(S_(1max))的影响显著;优化设计后的密封结构最大变形量降低了57.2%,密封面的接触平均压力提高了7.8%,实现了对浮动球球阀密封结构进行高精密设计的目的。Aiming at the problem of poor sealing of all-welded ball valves,a comprehensive study of sealing performance of NPS16 Class600 ball valve was executed by means of theory,simulation and verified by experiments,and the multi-objective optimization design of sealing structure parameters was carried out based on response surface method.Firstly,the design of experiment(DOE)and response surface method(RSM)methods were used to establish the optimizing equation,and the force of sealing construction was analyzed.Then,by building a test platform,the openness of the sealing structure was tested and the results of the simulation analysis were verified according to the test results.The ANSYS software was used to carry out a static analysis of the sealing structure of the floating ball valve,and the influence of the diameter of the ball(d_(1)),the thickness of the seat(D_(7)),the middle diameter(D_(10))and the chamfer(D_(A))on the sealing performance was studied.Finally,based on the response surface optimization(RSO)module,the main sealing structural parameters were optimized,and the optimization effect and sealing performance were further verified.The results indicate that the effect of D_(10)on the minimum gap value(C_(min))was the most significant.The effect of d_(1)on the maximum equivalent force(S_(1max))has the highest significance.Under the coupling effect of the two parameters of the sealing structure,the effect of D_(A)and D_(7)on the minimum clearance value(C_(min))is significant,and the effect of D_(A)and d_(1)on the maximum equivalent force(S_(1max))is significant.The maximum deformation(D_(emax))of the seal structure after the optimized design is reduced by 57.2%and the average contact pressure of the sealing surface is increased by 7.8%,which can achieve a high-precision design of the sealing structure of the floating ball valve.

关 键 词：液压控制阀 响应面法 试验设计法 全焊接球阀 密封性能 最小间隙值 最大等效应力 

分 类 号：TH137.52[机械工程—机械制造及自动化] TH134