摘要
为确保液化天然气(LNG)系统的安全性和可靠性,超低温截止阀在失火条件下必须保证泄漏率在合理范围内,所以阀门出厂前需要进行耐火试验,得到试验泄漏率。对超低温截止阀DN25进行耐火试验仿真,同样可以得到密封面的间隙,并计算得到仿真泄漏率。将仿真泄漏率与试验泄漏率进行对比,可以验证仿真的准确性。进一步将可能影响泄漏率的摩擦因数、螺纹预紧力和合金热膨胀因数等因素进行单因素分析,得到摩擦因数对泄漏率影响较大的结论。试验仿真和分析结果有助于减少时间成本和经济成本,可为后续阀门的设计优化提供方向。
To ensure the safety and reliability of liquefied natural gas(LNG)systems,the leakage rate of ultra-low temperature globe valves must be maintained within a reasonable range under fire conditions.Therefore,these valves are required to undergo fire resistance tests before leaving the factory to obtain the experimental leakage rate.Through fire resistance test simulation of a DN25 ultra-low temperature globe valve,the gap at the sealing surface is determined,and the simulated leakage rate is calculated.The accuracy of the simulation is validated by comparing the simulated leakage rate with the experimental leakage rate.Furthermore,a single-factor analysis is conducted on factors that may affect the leakage rate,such as the friction coefficient,thread preload force,and alloy thermal expansion coefficient.The analysis indicates that the friction coefficient has a significant influence on the leakage rate.The test simulation and analysis results contribute to reducing both time and economic costs,and provide direction for the subsequent design optimization of the valves.
作者
曹嘉夫
孙宏伟
杨晨
滕媛媛
CAO Jiafu;SUN Hongwei;YANG Chen;TENG Yuanyuan(The Second Military Representive Office of the Naval Equipment Department in Shanghai,Shanghai 200135,China;Logistic Engineering College,Shanghai Maritime University,Shanghai 201306,China;Shanghai Hudong Marine Valve Manuf.Co.,Ltd.,Shanghai 201913,China)
出处
《机电设备》
2025年第6期57-63,共7页
Mechanical and Electrical Equipment
关键词
液化天然气(LNG)
截止阀
耐火试验
泄漏率
单因素分析
liquefied natural gas(LNG)
cryogenic globe valve
fire resistance test
leakage rate
single factor analysis
