摘要
为了满足特殊工况对中线衬胶蝶阀在小开度5%~15%范围内有流量,且能实现快速响应的需求,分析了常规中线衬胶蝶阀的设计原理,并着重对密封副的结构、密封方式和启闭行程等进行了研究。针对其工艺需求及优缺点,利用衬胶阀座可塑性较好的特点,对阀座进行了改进设计,并详述了改进方案的设计思路、细节和优势。采用模拟结合试验验证的方法,对改进结构和常规结构进行流量分析。结果表明,改进结构5%开度的流量系数Cv与常规结构15%开度的Cv相当;改进后的阀门在5%开度即可产生流量,且在15%开度范围内,改进结构的Cv比常规结构高100%~250%;在20%~50%开度范围,2种结构的Cv趋于相同;在50%~100%开度范围内,改进结构的Cv比常规结构低10%~25%;通过将实际阀门流量试验数据与仿真分析的数据进行比较,流量变化趋势一致,特别是在小开度区域,验证了该改进设计的可信度。研究结果可以为中线衬胶蝶阀小开度有流量的相关研究提供参考。
To meet the demand for fast response in the range of 5%~15%small opening by the rubber‑lined centerline‑typebutterfly valve under specific working conditions in the post‑rolling cooling system,the design principle of the conventional type was analyzed,especially in terms of structural sides,sealing modes,opening and closing strokes of the sealing pair.Based on the process requirements and the advantages and disadvantages of the conventional structure,the valve seat design was improved by leveraging the good plasticity of the rubber‑lined valve seat.The design ideas and corresponding advantages were elaborated.Finally,a simulation combined with flow test verification was conducted to compare and analyze the flow rate between the improved structure and the conventional structure.The results indicate that the Cv value of the improved structure at 5%opening is comparable to that of the conventional structure at 15%opening.The improved valve can produce flow at 5%opening,and within the range of 15%opening,the Cv value of the improved structure is 100%~250%higher than that of the conventional structure.Within the range of 20%~50%opening,the Cv values of the two structures tend to be the same,while in the range of 50%~100%opening,the Cv value of the improved structure is 10%~25%lower than that of the conventional structure.Additionally,by comparing actual flow test data with simulation results,the flow trend is consistent,particularly in the small‑opening range,confirming the credibility of the improved design.The findings of this study provide a reference for optimizing the small‑opening and flow rate performance of centerline‑type rubber‑lined butterfly valves.
作者
周位伟
刘柏圻
郝娇山
刘诗梅
张黎
ZHOU Weiwei;LIU Baiqi;HAO Jiaoshan;LIU Simei;ZHANG Li(Chongqing Chuanyi Control Valve Co.,Ltd.,Chongqing 400700,China)
出处
《流体机械》
北大核心
2025年第3期97-103,共7页
Fluid Machinery
基金
重庆市经信委技术创新项目(渝经信科技[2022]16号)。
关键词
中线蝶阀
小开度
阀座
centerline‑type butterfly valve
small opening
valve seat
