工程设计学报2024，Vol.31Issue(4)：511-520,10.DOI:10.3785/j.issn.1006-754X.2024.03.180
全金属硬密封双向零泄漏三偏心蝶阀设计与分析
Design and analysis of all-metal hard sealing bidirectional zero-leakage triple eccentric butterfly valve
摘要
Abstract
Aiming at the problems of the traditional triple eccentric butterfly valve to withstand a certain differential pressure or reverse pressure of full differential pressure,an all-metal hard sealing bidirectional zero-leakage triple eccentric butterfly valve is studied and designed.The valve is long-life and energy-saving,and it adopts the triple eccentric principle to solve the defect that the sealing surface of the traditional eccentric butterfly valve is still in sliding contact friction at the moment of opening 10º and closing,which realizes the effect that the sealing surface of the butterfly valve separates at the moment of opening and seals at the moment of closing contact.Firstly,the unbalanced torque and allowable differential pressure of the designed butterfly valve were analyzed theoretically,and the pressure,velocity and flow trace of the fluid in the butterfly valve chamber with different openings were analyzed through fluid flow simulation.The variation curves of the maximum pressure and maximum velocity at the inlet and outlet of butterfly valve with the valve opening were obtained.Then,the thermal temperature and resultant heat flow cloud maps of the butterfly valve were obtained through thermal stress simulation analysis,and the distribution of thermal stress,thermal strain and safety factor of the butterfly valve as well as the variation curve of its maximum thermal stress with fluid temperature were analyzed,which verified that the thermal stress of the butterfly valve met the requirements.Finally,the butterfly valve body pressure test and positive and negative high-pressure sealing test were carried out.The test results showed that there was no visible leakage and deformation of the butterfly valve body,and the measured leakage was zero,indicating that the compressive strength and sealing performance of the butterfly valve met the use requirements.The research results provide a basis for the reduction of contact and friction,the decrease of opening torque and the extension of service life of triple eccentric butterfly valves,and the proposed all-metal hard sealing structure provides a new idea for the research of bidirectional zero-leakage sealing of triple eccentric butterfly valves.关键词
硬密封/双向零泄漏/三偏心蝶阀/热应力仿真/密封试验Key words
hard sealing/bidirectional zero-leakage/triple eccentric butterfly valve/thermal stress simulation/sealing test分类
轻工纺织引用本文复制引用
余瑞明,马云艳,池伟,沈宇忠..全金属硬密封双向零泄漏三偏心蝶阀设计与分析[J].工程设计学报,2024,31(4):511-520,10.基金项目
国家自然科学基金资助项目(51975379) （51975379）
上海市自然科学基金资助项目(19ZR1435500) （19ZR1435500）
上海理工大学发展基金资助项目(2020KJFZ137) （2020KJFZ137）
