【摘要】 为了提高氢氧发动机静密封的可靠性，解决低温（２０Ｋ）、高压（２４ＭＰａ）、高真空（１０－３Ｐａ）环境中的静密封问题，设计了专用低温恒温器，用氦质谱检漏仪测定液氢温度下不同内压时试验法兰的密封性，取得了圆满成功。更多还原

【Abstract】 This paper presents the construction of an apparatus to test the heliumleak of a steady seal device, with a sensitivity of 0. 5 X 10 10 pa .m3/s using a mass spectrometer. The temperature of steady seal device was controlled to 20 K and the pressure inside thedevice was applied up to 24 MPa. The testing results are also presented in this paper.更多还原