受限空间离心真空泵进气管道气动优化设计  

Aerodynamic Optimization Design of Intake Pipe of Centrifugal Vacuum Pump in Confined Space

作　　者：齐大伟[1] 李传旭 陈德江[1] 赵顺洪 QI Dawei;LI Chuanxu;CHEN Dejiang;ZHAO Shunhong(Hypersonic Aerodynamics Institute of China Aerodynamics Research and Development Center,Mianyang 621000,China;Chengdu Huaxi Chemical Technology Co.,Ltd.,Chengdu 610000,China)

机构地区：[1]中国空气动力研究与发展中心超高速空气动力研究所,四川绵阳621000 [2]成都华西化工科技股份有限公司,四川成都610000

出　　处：《真空》2025年第2期35-41,共7页Vacuum

摘　　要：针对受限空间条件下大型离心真空泵并联运行入口流量难以均匀分配的问题,采用数值模拟方法对离心真空泵入口四路五通管道进行气动分析,获得了进气流动均匀、流动压力损失小、流量分配均匀的气动结构,并通过实际应用进行了验证。结果表明:采用相贯锥面一分二、二分四进行分流是受限空间条件下较为有效的四路五通分流策略;在前后进气口路径长短差异较大,难以同时满足流动均匀性和流阻匹配条件下,以降低流阻为主,可设计整流装置来匹配流阻差异;优化后气动结构主管道与各进气口压差及流量实际测试结果与计算结果一致,设计方法有效且可行。Aiming at the problem that the inlet flow of large-scale centrifugal vacuum pump is difficult to distribute uniformly in parallel operation in confined space,the aerodynamic analysis of four-way and five-way inlet pipes of centrifugal vacuum pump is carried out by numerical simulation analysis.The aerodynamic structure with uniform inlet flow,small flow pressure loss and uniform flow distribution is obtained,and it is verified by practical application.The results show that the strategy of dividing intersecting cone into two and then dividing into four is an effective four-way and five-way diversion strategy in confined space.Under the condition that the length of the front and rear air inlet paths is quite different,it is difficult to meet the flow uniformity and flow resistance matching at the same time,so the rectifier is designed to match the flow resistance difference.The practical test results of pressure difference between the main pipeline and inlets of optimized pneumatic structure and their flow rate are consistent with the calculated results,indicating that the design method is effective and feasible.

关 键 词：受限空间 离心真空泵 五通管道 气动结构 

分 类 号：TH452[机械工程—机械制造及自动化]