真空测量装置的流导对测量真空度的影响
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摘要
夹层真空度是影响低温容器真空绝热性能的主要因素。真空度测量结果不仅与真空规管本身的测量精度有关,还与真空测量装置的流导有关。搭建了真空测量系统,设计两种不同流导的真空测量装置,模拟高真空多层绝热低温容器真空测量系统的实际工况,测量这两种装置下的真空度并进行分析。结果表明真空测量装置的流导大小对该装置的真空度测量有较大影响,流导大的测量装置需要较短的抽气时间就能保证该装置上规管的测量值有较好的精度。结果可为低温容器真空测量系统的设计、试验和使用提供参考。
The interlayer vacuum is the main factor that affects the vacuum insulation performance of the cryogenic vessel. The result of vacuum measurement is not only related to the measurement accuracy of the vacuum gauge,but also to the flow conductance of the vacuum measurement structure. The vacuum measurement system was built and two different flow conductance of the vacuum measurement structure were designed. In the experiment,the actual situations of the vacuum measurement system were simulated in the high vacuum multilayer insulated cryogenic vessel. The vacuum under the two structures were measured and analyzed. The results show that the flow conductance of the vacuum measurement structure greatly affects its vacuum measurement. Large flow conductance of the structure can ensure better accuracy of the result measured by the vacuum gauge on this structure in shorter pumping time. The analysis results provide certain references to design,experiment and usage of the vacuum measurement system of the cryogenic vessel.
The interlayer vacuum is the main factor that affects the vacuum insulation performance of the cryogenic vessel. The result of vacuum measurement is not only related to the measurement accuracy of the vacuum gauge,but also to the flow conductance of the vacuum measurement structure. The vacuum measurement system was built and two different flow conductance of the vacuum measurement structure were designed. In the experiment,the actual situations of the vacuum measurement system were simulated in the high vacuum multilayer insulated cryogenic vessel. The vacuum under the two structures were measured and analyzed. The results show that the flow conductance of the vacuum measurement structure greatly affects its vacuum measurement. Large flow conductance of the structure can ensure better accuracy of the result measured by the vacuum gauge on this structure in shorter pumping time. The analysis results provide certain references to design,experiment and usage of the vacuum measurement system of the cryogenic vessel.
引文
[1]谢高峰.高真空多层绝热低温容器完全真空丧失实验及传热机理研究[D].上海:上海交通大学,2011:1-4.
[2]姚小静,赵路宁,韩伟,等.真空绝热压力容器定期检验评定方法研究[J].低温与特气,2014,32(3):10-13.
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[4]朱武,干蜀毅.真空测量与控制[M].安徽:合肥工业大学出版社,2008:107-112.
[5]达道安.真空设计手册(第3版)[M].北京:国防工业出版社,2006:102-132.
[2]姚小静,赵路宁,韩伟,等.真空绝热压力容器定期检验评定方法研究[J].低温与特气,2014,32(3):10-13.
[3]詹家立.低温绝热压力容器真空规管存在的问题及解决措施[J].大科技,2014(12):318-319.
[4]朱武,干蜀毅.真空测量与控制[M].安徽:合肥工业大学出版社,2008:107-112.
[5]达道安.真空设计手册(第3版)[M].北京:国防工业出版社,2006:102-132.