基于泄漏率的垫片参数测试方法优化研究

Experimental research of optimized testing method on the gasket parameters based on leakage rate

垫片系数m和预紧比压y是法兰螺栓连接结构设计中的2个关键参数,ASMEⅧ.1卷和GB/T 150.3给出的都是基于结构强度的工程经验值,未与泄漏率关联。针对现有垫片参数测试方法不足之处进行优化调整,提出了一种更符合国内垫片标准体系和工程应用实际的垫片参数测试方法。通过与现有方法的试验比对,并对8类典型垫片产品进行验证测试,测试结果误差都在1%左右。使用多孔介质模型及Logistic模型对测试结果进行拟合,结果表明,该方法测试结果可靠,拟合情况良好,可供法兰螺栓连接结构设计参考使用。

Maintenance factor m and yield factor y are two key gasket parameters in the design of bolted flange joints.However,the wildly used y and m values in ASMEⅧ.1 and GB/T 150.3 code are derived from engineering experience,which are based on structural strength and are not related to the leakage level.By researching and analyzing the advantages and disadvantages of current testing method on gasket parameters,a new optimized testing method was proposed,which is much more in line with the domestic gasket standard system and engineering application.The comparison experiments and verification tests on the 8 typical kinds of gaskets were carried out,showing that the test results have an error of about 1%.The porous model and Logistic model were used to fit the test results.The results show that the procedure and parameters of the new method are more reasonable.It can be used for reference in the design of bolted flange joints.