家用燃气器具气密性试验原理及其应用概要

Summary of Soundness Test Principle and Application for Domestic Gas Appliances

归纳了流体密封和气密性试验的技术原理和主要分类,并以差压法为例分析燃气器具生产过程试验,指出对于试验要求范围内的燃气器具泄漏类型,一般情况下气体泄漏流动过程处于粘滞流状态,在试验条件符合强化试验原则时,设备压力降与试验压力之间存在近似线性关系,论证了在不同试验压力下检测结果的差异,从而提出了确定试验条件的基本准贝1J。同时,也讨论了密封效果随燃气压力升高而增强的自紧式密封结构的特殊情况,这类结构采取降低试验压力的措施可以更有效检出泄漏_.指出适当提高试验压力是提高准确度的主要措施,以及不满足强化试验原则的应对建议.最后,介绍了上述研究成果在燃气器具制造过程的运用经验。

In this paper,the technical principle and main classification of fluid seal and air tightness test are summarized.Taking the differential pressure method as an example to analyze the production process of gas appliances,it is pointed out that under the condition of strengthening test,the gas leakage flow process is in a viscous flow state,and there is an approximate linear relationship between the equipmenfs pressure drop and the test pressure.The difference in test results under test pressure provides a basic criterion for determining test conditions.It is pointed out that the appropriate increase of test pressure is the main measure to improve the accuracy.At the same time,the special case of the self-tight seal structure whose sealing effect is enhanced with the increase of gas pressure is also discussed.Leakage can be detected more effectively in such structures by taking measures to reduce the test pressure.It is pointed out that it should not meet the recommendations of the intensive test principle.Finally,the application experience of the above research results in gas appliances manufacturing process is introduced.