全金属硬密封双向零泄漏三偏心蝶阀设计与分析OA北大核心CSTPCD
Design and analysis of all-metal hard sealing bidirectional zero-leakage triple eccentric butterfly valve
针对传统三偏心蝶阀承受一定压差或全压差的反向压力等问题,研究设计了一种全金属硬密封双向零泄漏三偏心蝶阀.该蝶阀为长寿命节能型,其采用三偏心原理设计,解决了传统偏心蝶阀在开启10°、关闭瞬间密封面仍处于滑动接触摩擦的缺陷,实现了蝶阀在开启瞬间密封面即分离、关闭接触即密封的效果.首先,对所设计蝶阀的不平衡力矩和允许压差进行了理论分析,并通过流体流动仿真分析了蝶阀开度不同时阀腔内流体的压力、速度和流动迹线,得到了蝶阀出入口的最大压力和最大速度随阀门开度的变化曲线.然后,通过热应力仿真分析得到了蝶阀的热力温度和合力热流量云图,并分析了蝶阀的热应力、热应变、安全系数的分布情况以及其最大热应力随流体温度的变化曲线,验证了蝶阀的热应力满足要求.最后,开展了蝶阀阀体耐压试验和正反向高压密封试验.试验结果表明,蝶阀阀体无可见渗漏和变形,且实测泄漏量均为零,说明该蝶阀的耐压强度和密封性能均满足使用要求.研究结果为三偏心蝶阀接触和摩擦的减少、开启力矩的降低以及使用寿命的延长提供了依据,所提出的全金属硬密封结构为三偏心蝶阀的双向零泄漏密封研究提供了新思路.
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.
余瑞明;马云艳;池伟;沈宇忠
上海理工大学 机械工程学院,上海 200093浙江力诺流体控制科技股份有限公司,浙江温州 325200
轻工业
硬密封双向零泄漏三偏心蝶阀热应力仿真密封试验
hard sealingbidirectional zero-leakagetriple eccentric butterfly valvethermal stress simulationsealing test
《工程设计学报》 2024 (004)
511-520 / 10
国家自然科学基金资助项目(51975379);上海市自然科学基金资助项目(19ZR1435500);上海理工大学发展基金资助项目(2020KJFZ137)
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