中国空间科学技术

中国空间科学技术

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压降检漏法的影响因素及改进措施

闫荣鑫;刘平;冯琪;洪晓鹏;师立侠;   

  1. 中国空间技术研究院,中国空间技术研究院,中国空间技术研究院,中国空间技术研究院,中国空间技术研究院 北京100094,北京100094,北京100094,北京100094,北京100094
  • 发布日期:2006-08-25

Factor of Leak Detection for Pressure Decay

Yan Rongxin Liu Ping Feng Qi Hong Xiaopeng Shi Lixia(China Academy of Space Technology,Beijing 100094)   

  • Online:2006-08-25

被引次数

6

摘要： 介绍了压降检漏法的基本原理、漏率的误差分析,分析了常用压降检漏存在的问题。通过增加保压时间,选择高分辨率和高精度的测温计和压力计,可提高测试灵敏度。当被检件中的气体温度低于露点温度时,水蒸汽压影响测试精度。采用直接称重法确定被检件的有效容积,可减少测试误差,通过多次测量平均漏率可降低测试数据的偏差。

关键词: 压力测量, 检漏, 误差分析

Abstract: The principle of pressure decay leak detection and the error of leak detection are(introduced).The problems of pressure decay are investigated.The higher sensitivity can be obtained by increasing time of waiting and by choosing high accuracy thermometer and manometer.The(accuracy) of testing can be affected by water vapor pressure when environment temperature is lower than dew point temperature.The error of testing date can be decreased by measuring effective(volume) of weighing gas directly and meaning several test datum