真空室压升法测量液态工质漏率可行性分析
Feasibility analysis of liquid leak rate testing with vacuum method
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摘要: 文章旨在探讨压升法测量液态工质漏率的可行性，研究液体泄漏的试验方法。首先根据液体饱和蒸气压的理论分析，得出液体挥发引起的定容压力增量；之后通过微进样系统，采用真空室静态升压方法，分别以全氟三乙胺和乙二醇水溶液为研究对象进行试验分析，研究得出漏入液体量V与压力变化ΔP成线性关系，与理论分析计算结果相符合，证明了压升法测液态工质漏率的可行性；最后提出了微量采样系统进行比对测量液态工质漏率的压升试验方法及计算公式。研究结果表明，压升法可有效地测量液态工质漏率，为液体的流动试验研究提供参考依据。Abstract: This paper studies the feasibility of testing liquid leak rate with the vacuum method. Based on the theoretical analysis of the saturated vaporization pressure, the constant-volume pressure increment is obtained. Then by using a micro infusing system and a vacuum method, i.e. the static pressure rise method, the liquid leak testing is carried out for C2H4(OH)2 and (C2F5)3N. The results show that there is a linear relationship between the leaking liquid volume V and the pressure increment ΔP, as in agreement with the theoretical calculation, which shows the feasibility of the vacuum method for testing liquid leak rate. The static pressure rise method with a micro infusing system for calibration is proposed and the calculation formula is obtained. It is shown that this method is effective for testing liquid leak rate, as a tool in the liquid flowing test study.
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Keywords:
- static pressure rise method
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